WO2020004539A1 - Mécanisme d'élimination de liquide résiduel, moule de moulage par soufflage, moule de cavité de soufflage et méthode d'élimination de liquide l'utilisant - Google Patents

Mécanisme d'élimination de liquide résiduel, moule de moulage par soufflage, moule de cavité de soufflage et méthode d'élimination de liquide l'utilisant Download PDF

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Publication number
WO2020004539A1
WO2020004539A1 PCT/JP2019/025564 JP2019025564W WO2020004539A1 WO 2020004539 A1 WO2020004539 A1 WO 2020004539A1 JP 2019025564 W JP2019025564 W JP 2019025564W WO 2020004539 A1 WO2020004539 A1 WO 2020004539A1
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WIPO (PCT)
Prior art keywords
blow
nozzle
liquid
preform
mold
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Ceased
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PCT/JP2019/025564
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English (en)
Japanese (ja)
Inventor
土屋　要一
清典 島田
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Nissei ASB Machine Co Ltd
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Nissei ASB Machine Co Ltd
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Priority to JP2020527625A priority Critical patent/JP7233428B2/ja
Publication of WO2020004539A1 publication Critical patent/WO2020004539A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/46—Component parts, details or accessories; Auxiliary operations characterised by using particular environment or blow fluids other than air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B29C49/12—Stretching rods

Definitions

  • the present invention relates to a residual liquid removing mechanism, a blow mold and a blow cavity mold, and a method for removing liquid using the same.
  • the preform is stretched in the closed cavity.
  • a plurality of air vents (hatched portions) penetrating from the inner side surface to the outer side surface are provided in the blow cavity mold.
  • the preform will burst. Sometimes. When the preform ruptures, the liquid for blow molding is also scattered, and a part thereof is ejected to the outside through the air vent shown in FIG. If the ejected liquid adheres to parts of the blow molding apparatus, the liquid may drop onto the preform and cause the above-described molding problems.
  • the liquid dropped from the blow nozzle or the liquid leaked or scattered to the outside of the container may adhere not only to the preforms and molded products but also to their transport parts.
  • the liquid adhering to the parts to be conveyed also becomes a new cause for causing the above-mentioned troubles in container molding when the liquid falls onto the preform conveyed using the parts.
  • Patent Literature 3 does not disclose a means for removing liquid remaining on other components used in a blow molding apparatus, such as a blow nozzle and a transport component.
  • JP 2016-513032 A Japanese Patent No. 5694154 Japanese Patent No. 6280205
  • An object of the present invention has been made in view of the above-described circumstances, and it is an object of the present invention to prevent a liquid remaining on a part used in a blow molding apparatus from falling onto a preform or a molded product. It is another object of the present invention to provide a blow molding die for efficiently draining liquid remaining in a container and a drainage method using the blow molding die. Still another object of the present invention is to provide a blow cavity mold in which liquid scattered due to rupture of a preform during blow molding is prevented from leaking outside the blow cavity mold.
  • a residual liquid removing mechanism includes at least a part of a blow molding apparatus that blow-molds a preform by introducing at least a liquid into a heated preform.
  • the component is a blow nozzle that ejects a liquid to be introduced into the preform, and the residual liquid removing mechanism according to the first aspect suctions the liquid remaining inside the blow nozzle.
  • the liquid suction means includes a suction pipe connected to the blow nozzle so as to communicate with the inside of the blow nozzle, and a vacuum suction device for sucking liquid remaining inside the blow nozzle through the suction pipe. ing.
  • the blow nozzle includes an air supply port opened to the outside of the blow nozzle, and a hollow passage communicating from the air supply port to the inside of the blow nozzle.
  • the component is a transport component for transporting at least one of the preform and the blow-molded molded product, and at least one of a molding die component.
  • the residual liquid removing mechanism according to the second aspect removes the liquid attached to the component.
  • the component is the transport component
  • the residual liquid removing mechanism according to the second aspect includes an upper surface of the transport component such that liquid attached to the upper surface of the transport component flows down from the top of the component by gravity. It is the gradient formed in the part.
  • the component is a take-out core arranged inside the molded article for removing a blow-molded article from the blow molding apparatus, and the component according to the third aspect.
  • the residual liquid removing mechanism includes air blow means for blowing compressed air to the transport component for removing a liquid attached to the transport component for transporting at least one of the preform and the blow molded article.
  • the component is disposed so as to cover a bottom surface of the molded product and at least a part of a side surface of the molded product in order to remove the blow molded product from the blow molding device.
  • a residual liquid removing mechanism according to a fourth aspect, wherein the residual liquid removing mechanism removes liquid attached to a transport component for transporting at least one of the preform and the blow molded article. Air blow means for blowing compressed air to the component is provided.
  • the method for removing residual liquid in a blow nozzle using a residual liquid removal mechanism is characterized in that the blow nozzle is configured to be openable and closable, and after blowing the preform, the blow nozzle Closing the blow nozzle, removing residual liquid from the closed blow nozzle using the liquid suction means, and allowing air to flow into the blow nozzle from the air supply port through the hollow passage.
  • the air is compressed air.
  • the blow nozzle includes a nozzle body provided with an injection port of a fluid for blow molding containing at least a liquid, an on-off valve of the injection port, and an extension rod inserted through the nozzle body. And the air supply port and the hollow passage are provided in at least one of the nozzle body and the extension rod.
  • the nozzle body is provided with a nozzle tip provided at the tip of the nozzle body so as to be adaptable to the mouth of the preform, and an injection port formed at the nozzle tip.
  • the on-off valve is a large-diameter portion provided on the extension rod, and the large-diameter portion is the extension rod. Closing the injection port when in the retracted position, releases the closing of the injection port when the stretching rod is moved to a position projecting from the.
  • a blow mold for blow molding a preform of the present invention includes: a spray mold for injecting a fluid containing at least a liquid into the inside of the preform; A stretch rod configured to be reciprocally movable to stretch the stretch rod, wherein the stretch rod is a first rod opening formed at a distal end portion of the stretch rod, which is a side located inside the preform. And a second rod opening formed at a base end portion of the extension rod, and formed in the extension rod so as to communicate the first rod opening and the second rod opening. And a rod fluid passage.
  • the blow molding die according to the first aspect of the present invention is configured such that the liquid is discharged from the injection mold in order to drain liquid remaining inside the blow-molded product with the mouth portion arranged upward.
  • a gas supply for injecting gas into the article is connectable to the injection mold, and the second opening of the extension rod sucks residual liquid from the first opening.
  • Liquid suction means can be connected.
  • the gas is injected from the gas supply source in a state in which the injection die is adapted to the blow-molded product with the mouth portion arranged upward. While being supplied to the mold, the liquid suction means sucks the liquid from the second opening of the stretching rod. At this time, a gas is injected from the injection mold into the molded article, and the liquid remaining in the molded article is blown off by applying pressure to the injected gas, and the residual liquid is removed by the first rod of the stretching rod. From the second opening through the rod fluid passage. This enables efficient drainage of the residual liquid.
  • the injection mold since the liquid remaining inside the blow-molded product is disposed with the mouth portion facing downward, the injection mold includes the molding.
  • the liquid suction means adjusts the injection mold.
  • the gas supply source supplies gas to the second opening of the stretching rod.
  • the gas supplied to the second opening is injected into the molded article from the first opening through the rod fluid passage of the extending rod, and remains inside the molded article by the injected gas.
  • the residual liquid is sucked from the injection mold. This enables efficient drainage of the residual liquid.
  • the injection mold as an example is a blow nozzle, and the blow nozzle is formed at the nozzle tip provided at the tip of the nozzle body so as to be adaptable to the mouth of the preform, and at the nozzle tip.
  • the nozzle port is configured to be connectable to a fluid supply unit that supplies at least a fluid containing a liquid, Is configured to be connectable to liquid suction means for sucking and discharging the residual liquid.
  • the nozzle port is configured such that the fluid supply unit and the air supply unit that supplies air are switchably connected.
  • the nozzle port suctions and discharges the residual liquid and a fluid supply unit that supplies at least a fluid containing a liquid.
  • the liquid suction means is configured to be switchably connected, and the second rod opening is configured to be connectable to air supply means for supplying air.
  • the method of blow molding a preform using the blow molding die having a blow nozzle according to the first configuration example of the present invention includes the steps of: setting a temperature-regulated preform in a blow cavity mold; Fitting the nozzle tip of the blow nozzle to the section, moving the stretching rod toward the bottom of the blow cavity mold to stretch the preform, and introducing fluid from the fluid supply means to the nozzle port.
  • the air supply means By ejecting a fluid from the nozzle opening to stretch the preform, the stretched preform is molded into a molded article by the blow cavity mold, and after the molding of the molded article is completed, the air supply means By introducing air into the nozzle port, air is directed from the nozzle opening toward the inside of the molded product.
  • the liquid is sucked, and the liquid suction means is operated to suck the liquid remaining inside the molded article from the first rod opening of the elongated rod to the second rod opening through the rod fluid passage. And draining the liquid.
  • a blow cavity mold of the present invention used for blow molding a preform with a fluid containing at least a liquid has at least a plurality of split dies connected to each other, and the plurality of split dies are provided. Are, in the connected state, a horizontal passage opening on the molding surface of the blow cavity mold, and a vertical passage connected to the horizontal passage, wherein the vertical passage opens on the lower surface of the blow cavity mold. And a passage.
  • each of the plurality of split dies has a connection surface, and two adjacent split dies are connected via each of the connection surfaces, and each of the connection surfaces has a lateral groove and a connection to the lateral groove.
  • a vertical groove is formed, the lateral passage is formed by aligning the two split-type lateral grooves connected to each other via the connection surface, the vertical passage is formed by the connection surface It is formed by aligning the vertical grooves of the two split molds that are connected to each other through the same.
  • a sealing member extending radially outside the vertical groove at least over the length of the vertical groove is provided. I have.
  • drainage means for receiving and draining the liquid flowing down from the opening is provided below the opening of the vertical passage formed on the lower surface.
  • each of the split dies of the blow cavity type is connected or integrally formed in a row in the side direction.
  • FIG. 1 is a schematic view of a blow molding apparatus in which a residual liquid removing apparatus by vacuum suction according to a first embodiment of the present invention is incorporated.
  • FIG. 2 is a schematic view of a blow nozzle for use in the blow molding apparatus shown in FIG. 1, showing a state in which an injection port of the blow nozzle is closed.
  • FIG. 3 is a schematic view of a blow nozzle for use in the blow molding apparatus shown in FIG. 1, showing a state in which an injection port of the blow nozzle is opened.
  • FIG. 4 is a perspective view of a blow molding machine in which the blow molding device shown in FIG. 1 is incorporated.
  • FIG. 5 is a view showing a part of each station of the blow molding machine shown in FIG.
  • FIG. 6 is a schematic diagram showing a pre-process of a process of blow-molding a preform using a blow nozzle according to one embodiment of the present invention. , Blow closing mold closing.
  • FIGS. 7A and 7B are schematic views showing steps of blow molding a preform using a blow nozzle according to an embodiment of the present invention, wherein FIG. 7A shows a state before blow molding, FIG. ) Shows the state when the blow molding is completed.
  • FIG. 8 is a schematic view showing a step subsequent to the step shown in FIG.
  • FIG. 9 is a flowchart showing a process of blow molding a preform using a blow nozzle according to one embodiment of the present invention.
  • FIG. 10 is a flowchart showing more detailed steps of the vertical axis stretching and the horizontal axis stretching of the preform in the flowchart of FIG.
  • FIGS. 11A and 11B are schematic diagrams of a transport plate provided with a residual liquid removing mechanism according to the second embodiment of the present invention. FIG. The plate is open with the neck mold.
  • FIG. 12 is a schematic view of a take-out core provided with a residual liquid removing mechanism according to the third embodiment of the present invention.
  • FIG. 13 is a schematic view for explaining a use mode of the take-out core shown in FIG. 12.
  • (A) shows a state in which the take-out core is inserted and arranged in a molded product in which a mouth portion is held by a neck mold.
  • the state (B) shows a state in which the conveying plate and the neck mold are opened and the molded product is taken out.
  • FIG. 14 is a flowchart showing a flow of removing the residual liquid using the take-out core having the residual liquid removing mechanism according to the third embodiment of the present invention.
  • FIG. 15 is a schematic view of a take-out pot provided with a residual liquid removing mechanism according to the fourth embodiment of the present invention.
  • FIG. 16 is a schematic view for explaining a use mode of the take-out pot shown in FIG. 15, wherein (A) shows a state in which the take-out pot is arranged below a molded product whose mouth is held by a neck mold. , (B) shows a state in which the conveying plate and the neck mold are opened, a molded product is taken out, and conveyed by the take-out pot, and (C) shows a state in which the liquid remaining in the neck mold is removed by the returned take-out pot. .
  • FIG. 17 is a flowchart showing a flow of removing a residual liquid by using a removal pot provided with a residual liquid removing mechanism according to the fourth embodiment of the present invention.
  • FIG. 18 is a schematic view of a mold for blow molding according to a sixth embodiment of the present invention.
  • FIG. 19 is a schematic view of a blow molding die according to the seventh embodiment of the present invention.
  • FIG. 20 is a schematic diagram of a liquid supply / blow circuit and a drain circuit used in the blow nozzle shown in FIG. FIG.
  • FIG. 21 is a schematic view showing a pre-process of a process of blow-molding a preform using a blow nozzle according to a sixth embodiment of the present invention, wherein (A) shows a preform loading process, ) Indicate the closing of the blow split mold.
  • FIGS. 22A and 22B are schematic diagrams illustrating a process of blow-molding a preform using a blow nozzle according to a sixth embodiment of the present invention, wherein FIG. (C) shows the state when blow molding is completed.
  • FIG. 23 is a schematic view showing a step subsequent to the step shown in FIG. 22, where (A) pulls up the extension rod, (B) closes the nozzle opening, and (C) pulls the blow nozzle apart. Each state is shown below.
  • FIG. 22A shows a preform loading process
  • FIG. 22B shows the state when blow molding is completed.
  • FIG. 23 is a schematic view showing a step subsequent to the step shown in FIG. 22, where (A) pulls up the extension
  • FIG. 24 is a flowchart showing a process of blow molding a preform using the blow molding die according to the sixth embodiment of the present invention.
  • FIG. 25 is a schematic diagram of a liquid supply / blow circuit and a drain circuit used in the blow molding die according to the seventh embodiment shown in FIGS. 19 and 25.
  • FIG. 26 is a schematic diagram showing a state when the liquid left in the molded product is drained using the blow molding die according to the seventh embodiment of the present invention.
  • FIG. 27 is a perspective view of a blow molding machine in which the blow molding process using the blow molding die according to the seventh embodiment shown in FIGS. 19 and 25 is incorporated as one step.
  • FIG. 28 is a schematic view showing a modified example of the first rod opening of the elongated rod.
  • FIG. 29 is a front view of one of the split dies and the bottom die that constitute the blow cavity die according to the eighth embodiment of the present invention.
  • FIG. 30 is a perspective view of one of the blow cavity split molds according to the eighth embodiment of the present invention.
  • FIG. 31 is a schematic top view of the blow cavity mold according to the eighth embodiment, in which the horizontal passage and the vertical passage are indicated by broken lines.
  • FIG. 32 is a schematic side view of a blow cavity mold according to the eighth embodiment, in which a horizontal passage and a vertical passage are indicated by broken lines.
  • FIGS. 33A and 33B are schematic diagrams showing each stage when blow molding a preform using the blow cavity mold according to the eighth embodiment, wherein FIG. 33A shows a state before blow molding and FIG. 33B shows a state during blow molding.
  • FIG. 34 is a front view of one of the split dies and the bottom die that constitute the blow cavity die according to the ninth embodiment of the present invention.
  • FIG. 35 is a schematic diagram of a blow molding apparatus for blow molding a preform using a blow cavity mold according to the eighth embodiment of the present invention.
  • FIG. 36 is a schematic diagram of a blow molding apparatus for blow molding a preform using a blow cavity mold according to a tenth embodiment of the present invention.
  • FIG. 37 is a schematic top view of the blow cavity type according to the tenth embodiment of the present invention, in which the horizontal passage and the vertical passage are indicated by broken lines.
  • FIG. 38 is a schematic top view of the blow cavity mold according to the eleventh embodiment of the present invention, in which the horizontal passage and the vertical passage are indicated by broken lines.
  • FIG. 39 is a schematic diagram for explaining a blow cavity mold according to an eleventh embodiment of the present invention.
  • FIG. 40 is a schematic view of a blow cavity mold according to the related art.
  • FIG. 1 is a schematic diagram of a blow molding apparatus 80.
  • the blow molding apparatus 80 has a residual liquid removing mechanism 1A by vacuum suction, which is a residual liquid removing mechanism according to the first embodiment of the present invention. Is incorporated.
  • a blow molding apparatus 80 shown in FIG. 1 blows a pressurized fluid containing at least a liquid to blow-mold a preform set in a blow cavity mold 100, and pressurized fluid is applied to the blow nozzle 1.
  • a supply path 14 connected to the port 6 of the blow nozzle for supplying the pressurized fluid to the blow nozzle 1.
  • the fluid supply unit 13 is configured to introduce a pressurized fluid, which is a mixture of a liquid (for example, water) and compressed air, to the blow nozzle 1, and includes a water supply source 60 and a liquid supply source.
  • a liquid supply circuit 62 for sending out the liquid supplied from the liquid supply 60, a storage unit 64 (a hose or a tank) for storing a predetermined amount of liquid from the liquid supply circuit 62, a high-pressure gas source 66 such as a compressor, and a high-pressure gas
  • An air supply circuit 68 for sending compressed air supplied from the source 66 to the storage unit 64, an air generation unit 70 for generating compressed air in the high-pressure gas source 66, and exhausting excess air from the storage unit 64 and the like.
  • a vacuum pump 74 and a vacuum suction circuit 76 for vacuum suctioning the inside of the blow nozzle 1 via the supply path 14.
  • the fluid supply unit 13 controls the supply of the pressurized fluid sent from the storage unit 64 to the supply path 14 and controls the above-described on-off valve V1 and the supply of compressed air from the air supply circuit 68 to the storage unit 64.
  • Air supply valve V2 a water supply valve V3 for controlling the supply of liquid such as water from the water supply circuit 62 to the storage unit 64, and an air release valve V4 for controlling the exhaust of excess air remaining in the storage unit 64 and the like.
  • a vacuum suction valve V5 for controlling the vacuum suction of the blow nozzle 1 via the vacuum suction circuit 76.
  • the residual liquid removing device 1A is a device that includes the vacuum pump 74, the vacuum suction circuit 76, the vacuum suction valve V5, and the supply path 14 among the above-described components. , Are incorporated in the blow molding device 80.
  • the blow nozzle 1 includes a nozzle body 2 and an extension rod 3 attached to the nozzle body 2 so as to be able to reciprocate in the axial direction with respect to the nozzle body 2.
  • the extension rod 3 is attached to the nozzle body 2 so as to be reciprocally movable in the axial direction with respect to the nozzle body 2 as shown by an arrow A by driving means (motor or the like) not shown.
  • the nozzle body 2 includes a nozzle tip 4 provided at the tip of the nozzle body 2 so as to be adaptable to the mouth of the preform, an ejection port 5 formed at the nozzle tip 4, and a fluid containing at least a liquid. 2, and a fluid passage 7 formed in the nozzle body 2 so as to communicate the port 6 with the injection port 5.
  • the extension rod 3 includes a linear rod body and a closing portion 10 formed near the tip 9 of the rod body.
  • the closing portion 10 is a large-diameter portion formed so as to conform to the inner peripheral wall 12 near the injection port 5, and has a larger radius than the rod body.
  • the linear rod body of the extension rod 3 slidably and liquid-tightly penetrates the through hole 11 of the nozzle body 2, and further passes through a section of the fluid passage 7 reaching the injection port 5. are doing.
  • the outer peripheral wall of the closing part 10 is slidably and liquid-tightly engaged with the inner peripheral wall 12.
  • the extension rod 3 is inserted through the nozzle body 2 so as to be able to reciprocate in the axial direction with respect to the nozzle body 2 as shown by an arrow A, and the predetermined length of the extension rod 3 with respect to the nozzle body 2 shown in FIG. In the position, the closure 10 closes the jet 5 liquid tightly.
  • a groove is formed on the outer peripheral wall of the closing part 10 along the circumferential direction. Then, a seal member such as an O-ring may be arranged in the groove.
  • a seal member such as an O-ring may be arranged in the groove.
  • the above-mentioned fluid supply unit 13 for supplying a pressurized fluid to the blow nozzle 1 is connected to the port 6 via a supply path 14. Therefore, in the state shown in FIG. 3, when the fluid is supplied from the fluid supply unit 13 to the port 6 via the supply path 14, the supplied fluid passes through the gap 8 of the fluid passage 7 and As shown by the arrow B, it is injected to the outside.
  • the fluid supply unit 13 includes an on-off valve V1.
  • the on-off operation of the on-off valve WV1 determines whether or not the pressurized fluid is supplied to the blow nozzle 1, and that the injection in the open state shown in FIG. Whether or not the fluid is ejected from the port 5 is controlled.
  • the fluid flows into the gap 8 of the nozzle body 2 before the extension rod 3 moves toward the bottom mold (when the ejection port 5 is in a closed state). May be stored in advance, and an operation may be performed such that a fluid is introduced into the preform simultaneously with the movement of the stretching rod 3 (while the ejection port 5 is opened). That is, the opening / closing part 10 of the extension rod 3 may be used instead of the fluid on / off valve.
  • the fluid used for blow molding in the present embodiment is a liquid or a mixture of a liquid and a gas.
  • An example of a preferred liquid is water, and an example of a preferred gas is air (compressed air).
  • the liquid and the gas are supplied to the fluid supply unit 13, and the fluid supply unit 13 introduces the mixture of the liquid and the gas into the port 6.
  • the port 6 is connected to the residual liquid removing device 1A provided in the fluid supply unit 13.
  • the on-off valve V1 of the fluid supply unit 13 is closed and the vacuum suction valve V5 is opened to operate the vacuum pump 74, the liquid in the blow nozzle is sucked through the port 6 and the supply path 14.
  • the blow nozzle 1 is provided with a passage for supplying air to the inside of the nozzle when the residual liquid removing device 1A suctions the blow nozzle 1 under vacuum.
  • the extension rod 3 has an air supply port 22 formed at the base end thereof, a rod hollow passage 20 extending from the air supply port 22 in the length direction of the extension rod 3, A large-diameter transverse passage 24 extending transversely at the portion 10 and having both ends open into the fluid passage 7, wherein the hollow rod passage 20 and the large-diameter transverse passage 24 intersect.
  • the nozzle body 2 has an air supply port 28 opening on the upper surface of the nozzle body 2, an air supply port 32 opening on the side surface of the nozzle body 2, and a fluid passage 7 extending from the air supply ports 28 and 32 in the nozzle.
  • Nozzle hollow passages 29 and 30 are opened to the inside. As shown in FIG. 2, when the fluid passage 7 is closed and the vacuum is suctioned from the port 6 by the residual liquid removing device 1A, the pressure inside the nozzle is reduced, so that air is supplied from the air supply ports 22, 28, and 32. Flows through the hollow passages 20, 24, 30 into the nozzle and flows through the fluid passage 7 to the port 6.
  • the residual liquid in the nozzle is blown off by the flow of the air, and is sucked together with the air from the port 6 into the residual liquid removing device 1A.
  • the air supply ports and the hollow passages described above may not be all shown but may be provided only one or two in the drawings. Of course, more than the illustration may be provided.
  • an air blow circuit (not shown) for supplying compressed air may be connected to the air supply ports 22, 28, 32.
  • the air blow circuit includes, for example, a high-pressure gas source, an air supply valve for controlling the supply of compressed air from the high-pressure gas source, and a check valve for preventing the liquid of the molding blow from flowing back to the air blow circuit.
  • a strong air flow is generated in the nozzle, and the residual liquid is blown off more efficiently, and the residual liquid removing device 1A suctions and discharges the residual liquid.
  • the preform to be blow-molded by the blow nozzle 1 is blow-molded by, for example, a blow molding machine 200 shown in FIG. 4 and is taken out as a molded product (hollow container).
  • the blow molding machine in FIG. 4 is a one-step type blow molding machine that intermittently rotates and transports a preform, and includes four main processes. These four steps are an injection molding step, a temperature adjustment step, a blow molding step, and a removal step.
  • the rotary conveying blow molding machine 200 includes an injection molding station 202, a temperature control station 204, a blow molding station 206, and a take-out station 208 for executing the above-described four steps in each of four divided areas of a 360 ° convey area. Is provided.
  • the injection molding station 202 forms a plurality of preforms 50 by injecting a resin material (for example, a synthetic resin or a biodegradable plastic made of PET, PE, or PP) into an injection mold 210 from an injection device (not shown) ( Injection process).
  • a resin material for example, a synthetic resin or a biodegradable plastic made of PET, PE, or PP
  • the plurality of injection-molded preforms 50 are transported to the temperature control station 204 by transporting means (not shown) (not shown) with the mouth portions held by the transporting plate 212.
  • temperature adjustment is performed so that the preform 50 has an appropriate molding temperature before the blow molding (temperature adjusting step).
  • This temperature control step is performed, for example, by placing the preform 50 in the heating pot 214 and inserting the temperature control core 216 inside the preform 50.
  • the preform 50 whose temperature has been adjusted is conveyed to the blow molding station 206 by conveying means (not shown).
  • the preform 50 is loaded into the blow cavity mold 100, and the above-described fluid is introduced into the preform 50 using the blow nozzle 1 according to the present embodiment.
  • the reform 50 is blow-molded into a molded product 52.
  • the blow-molded product 52 is conveyed to a take-out station 208 by conveyance means (not shown). At the take-out station 208, the molded product 52 is taken out of the blow molding machine 200 by take-out means (not shown) (take-out step).
  • Neck mold 200 includes neck split molds 220A and 220B, as best shown in FIG. 5 (D).
  • the neck split dies 220A and 220B are connected, the preform 50 and the molded product 52 are sandwiched therebetween, and can be transported to the stations 202, 204, and 206 together with the transport plate 212.
  • the neck split molds 220A and 220B are separated, and the molded product 52 is no longer held by the neck mold 200, falls down due to gravity, and can be removed from the blow molding machine 200.
  • the transport plate 212 may also be configured to be separable into two plates, and in this case, the neck split dies 220A and 220B may be configured to be separable together with the transport plate 212. Alternatively, the split neck dies 220A and 220B may be configured to be separable on the transport plate 212 that cannot be separated.
  • the above-described blow molding machine 200 is exemplified by a rotary transfer type one-step type (hot parison type) blow molding machine, the blow molding machine 200 to which the present invention can be applied is not limited to this type.
  • a 1.5-step type (cool parison type) or a two-step type (cold parison type) blow molding machine may be used, and a preform may be transported not by a rotary transport by a rotary plate but by a linear transport. I do not care.
  • the temperature-regulated preform 50 is loaded into the blow molding station (206 in FIG. 4) via the movement of the neck mold 220 (step 300).
  • the preform 50 is disposed between blow split molds 100A and 100B which are arranged at an interval.
  • the blow nozzle 1 is arranged above the preform 50 in a state where the injection port 5 is closed by the closing portion 10.
  • blow split molds 100A and 100B are closed (step 301).
  • the setting of the preform 50 in the blow cavity mold 100 is completed.
  • the blow molds with the molds closed form a blow cavity mold 100 integrally, and the opening 55 of the preform 50 is formed in the upper opening 101 of the blow cavity mold 100. Be attached.
  • the inner surface of the blow cavity mold 100 forms a molding surface 102.
  • the blow nozzle 1 is lowered, and the nozzle tip 4 of the blow nozzle 1 is fitted to the mouth 55 of the preform. Specifically, the blow nozzle 1 is fitted to the inner wall surface of the mouth 55 or is fitted to the opening end surface (top surface). Contact is made (step 302). After the nozzle tip 4 of the blow nozzle 1 is adapted to the mouth 55 of the preform 50, the molds of the blow split molds 100A and 100B may be closed.
  • FIG. 7A shows the state when steps 300 and 302 are executed.
  • the state shown in FIG. 7A is a state in which preparation for blow molding is completed.
  • step 304 blow molding is performed by stretching the preform in the longitudinal and transverse directions (step 304 in FIG. 9).
  • the extension rod 3 is lowered, the closing of the injection port 5 by the closing portion 5 is released, and a pressurized fluid including a liquid and a gas is introduced into the port 6. .
  • the preform 51 being formed is mainly stretched in the vertical axis by the stretching rod 3 and in the horizontal axis by the pressurized fluid.
  • the residual liquid in the molded product 52 used for blow molding is drained while the completed product 52 is transported from the blow molding station to the take-out station. This draining is performed by turning the finished product upside down and / or by suctioning residual liquid from the finished product.
  • step 308 is moved away from the bottom of the blow cavity mold 100 (Step 308 in FIG. 9).
  • the state of step 308 is shown in FIG.
  • Step 310 in FIG. 9 the closing part 10 closes the inner peripheral wall 12 near the injection port 5 of the nozzle body 2 in a liquid-tight manner.
  • FIG. 8B shows the state of step 310.
  • Step 311 in FIG. 9 an operation of removing the liquid remaining in the blow nozzle 1 is performed by the residual liquid removing device 1A according to the first embodiment (Step 311 in FIG. 9). Specifically, this liquid removing operation is performed by controlling the vacuum suction valve V5 of FIG. 1 from closed to open and operating the vacuum pump 74. As a result, the liquid remaining in the blow nozzle 1 is sucked from the port 6 to the vacuum suction circuit 76 via the supply path 14 by the negative pressure generated by the vacuum pump 74. At this time, air (compressed air) is simultaneously supplied from the air supply ports 22, 28, 32 through the hollow passages 20, 24, 30 into the depressurized blow nozzle 1.
  • the residual liquid in the nozzle is blown off by the flow of the air, and the liquid is sucked together with the air from the port 6 to the residual liquid removing device 1A. Further, it is possible to prevent the nozzle body 2 from being crushed by the atmospheric pressure due to the pressure of the inflowing air.
  • Step 312 in FIG. 9 The state of step 312 is shown in FIG.
  • the connected blow split molds 100A and 100B are separated, and the state shown in FIG. 6A is obtained, and the preparation for receiving the preform of the next cycle is completed.
  • the vacuum suction operation in step 311 may be continued to step 312 or may be started from step 12.
  • the molded product 52 is removed from the blow cavity mold 100 (Step 314), and is conveyed to the removal station 208 shown in FIG. 4 (Step 316 in FIG. 9). In the removal station 208, the completed molded product 208 is removed as a product.
  • a preform for the next cycle is prepared (step 318 in FIG. 9), the process returns to step 300, and the above-described processing is repeated in the cycle.
  • the preparation of the preform of the next cycle is performed by injecting the preform at the injection station 202 in FIG. 4 and reheating (temperature adjustment) the preform at the temperature control station 204, and may be performed simultaneously with the steps 314 and 316. Good.
  • step 304 in FIG. 9 will be described with reference to the flowchart in FIG.
  • step 304 of FIG. 9 is started by moving (falling) the extension rod 3 toward the bottom of the blow cavity mold 100 from the state of FIG. 7A (step 400). ).
  • the closed injection port 5 is opened (step 401). Further, as shown in FIG. 7B, the descending stretching rod 3 reaches the bottom of the preform 50, and extends the preform 50 in the vertical axis (Step 402).
  • a fluid is introduced into the nozzle body 2 through the port 6 (Step 403), the fluid is ejected from the ejection port 5 (Step 404), and the preform is stretched in the horizontal axis by the fluid (Step 408).
  • the injected fluid causes the preform to stretch not only in the horizontal axis direction but also in the vertical axis direction, but the vertical axis stretching is mainly performed by the stretching rod 3.
  • the preform 51 stretched in this way is molded by the molding surface 102 of the blow cavity mold 100 (step 404). As shown in FIG. 7 (B), it will be understood that the preform 51 to be stretched reaches the molding surface 102, where it is molded.
  • the vertical axis stretching of step 402 is performed first and the horizontal axis stretching of step 408 is performed first to prevent misalignment of the bottom of the final container, and when the vertical axis stretching is performed first (preliminary stretching), the thickness distribution of the container is adjusted. This is because molding is easy. However, in the case of a thick container for accommodating cosmetics or the like in which the vertical axis stretching is rarely performed, or in a small container for storing pharmaceuticals, etc., the vertical axis and the horizontal axis may be simultaneously performed. It is thought that it is also possible to perform.
  • the operation when the fluid supply unit 13 shown in FIG. 7 is used for introducing the fluid into the blow nozzle 1 in step 403 in FIG. 10 is as follows. That is, the water supply valve V3 is opened with the on-off valve V1, the air supply valve V2, and the vacuum suction valve V5 closed and the air release valve V4 opened, and a predetermined amount of liquid is stored in the storage unit 64. Next, after the storage of the liquid is completed, the water supply valve V3 and the air release valve V4 are closed. Open the air supply valve V2 and pressurize the liquid with compressed air.
  • the on-off valve V1 When the pressure in the storage section 64 reaches a predetermined pressure, the on-off valve V1 is opened, and a mixture (pressurized medium) composed of a liquid and a gas is introduced into the blow nozzle 1 through the supply path 14 and the port 6, and the preform 50 Perform blow molding.
  • the air supply valve V2 is closed and the air release valve V4 is opened to exhaust excess gas on the molded product 52 (container) and the circuit of the fluid supply unit 13. Then, the inside of the molded product 52 (container) is depressurized (another exhaust valve may be installed near the blow nozzle).
  • the on-off valve V1 is closed. The extending rod 3 is raised, and the injection port 5 is closed in a liquid-tight state by the closing portion 10 (steps 308 and 310 in FIG. 9, the states in FIGS. 8A and 8B). After the liquid tightness is completed, the blow nozzle 1 is raised (the state shown in FIG. 8C).
  • the vacuum suction valve V5 is opened, and the vacuum pump 74 removes the residual liquid in the nozzle body. After removing the residual liquid, the molded product is carried out, and the suction valve V5 is closed.
  • the preform 50 can be blown with both the gas and the liquid,
  • the pressure of the medium mixture can be controlled on the basis of the pressure of the gas. That is, the preform can be blow-molded without using a device for directly applying pressure to the liquid, and the system can be simplified.
  • the characteristics of the pressurized medium as a non-compressible fluid (liquid) are superior to a compressible fluid (gas), and improvement in shapeability and moldability can be expected.
  • the mechanism for generating compressed air that is, the air generation unit 70 can be simplified, and the existing air can be blown.
  • the generation unit can be used.
  • the injection port 5 is closed after the completion of the molding blow, and the liquid remaining in the blow nozzle 1 is removed by vacuum suction. Therefore, it is possible to reduce the possibility that the residual liquid in the blow nozzle 1 falls on the preform, and to prevent molding problems beforehand. For example, during the transition from the state of FIG. 6A to the state of FIG. 7A through the state of FIG. 6B, there is no danger of the residual liquid dropping on the temperature-regulated preform in the next cycle. . In particular, the residual liquid is likely to fall because vibration occurs in the mold closing operation shown in FIG. 6B. However, according to the embodiment of the present invention, the residual liquid may fall into the preform even in this case.
  • Prevention can be surely prevented.
  • the residual liquid can be prevented from dropping on the preform before reaching the state immediately before molding shown in FIG. 7A.
  • the opened injection port 5 is opened. Therefore, the possibility that the residual liquid in the blow nozzle 1 falls can be extremely reduced.
  • the residual liquid of the blow nozzle 1 may drop onto a transfer part or a mold of the blow molding machine 200. There is no danger of the liquid dropping onto the preform via the parts and the like.
  • the preform stretching rod 3 is provided with the closing portion 10 in a very simple configuration, and the preform is only reciprocated by the reciprocating movement of the stretching rod 3.
  • the opening and closing operation of the injection port 5 became possible. Therefore, by using the residual liquid removing device 1A according to the present embodiment and the blow nozzle 1 shown in FIGS. 2 and 3 together, it is possible to further promote the effect of the present embodiment.
  • the residual liquid removing device 1A is configured to be incorporated inside the fluid supply unit 13, but is not limited to this example, and may be provided outside the fluid supply unit 13.
  • the vacuum suction circuit 76 may be branched from the supply path 14 extending outside between the fluid supply unit 13 and the blow nozzle 1 and connected to the vacuum pump 74.
  • the blow nozzle 1 to which the residual liquid removing device 1A is connected is not limited to the above example.
  • a blow nozzle in a mode in which the extension portion is not provided with the closing portion 10 (large-diameter portion) is also considered.
  • a plate-like member (not shown) that can completely seal the injection port 5 after the extension rod 3 is completely accommodated in the nozzle body 2 is used as the opening and closing means of the injection port 5.
  • the residual liquid in the nozzle is sucked by the residual liquid removing device 1A, and the blowout port 5 is opened by retracting the plate-like member from the spray port 5 at the time of blow molding.
  • the compressed air is supplied to the blow nozzle and vacuum suction shown in FIG. The residual liquid adhered including the portion can be removed.
  • the residual liquid removing device 1A of the present invention can be applied to a blow nozzle having no stretching rod.
  • the preform is stretched using a mixture of a liquid and a gas or a liquid.
  • the residual liquid removing device 1A can be applied to a blow nozzle in which the opening / closing means of the injection port 5 is not provided. That is, the residual liquid removing device 1A of the present invention provides a means capable of efficiently removing the liquid remaining inside the blow nozzle of any form.
  • FIG. 11 is a schematic diagram when the transport plate of FIGS. 4 and 5 is viewed from the column direction of the preform and the molded product.
  • the transport plate 212 for transporting the preform and the completed product has a neck mold 220 for gripping the preform and the completed product.
  • the transfer plate 212 includes transfer split plates 212A and 212B that can be separated and connected, and the neck mold 220 includes neck split dies 220A and 220B that can be separated and connected.
  • the neck split die 220A is attached to the transport split plate 212A
  • the neck split die 220B is attached to the transport split plate 212B.
  • the neck split die 220B is integrated with each other as shown in FIG. It can operate in an open state as shown in B) or from an open state to a closed state. In the closed state shown in FIG. 11A, the mouth 53 of the completed product 52 can be held by the neck mold 220, and in the open state shown in FIG. , And fall in a container (not shown) arranged immediately below.
  • the upper surface of the conventional transport plate is a flat surface, but in the second embodiment, the transport plate 212 is provided with inclined portions 222A and 222B as one form of a residual liquid removing mechanism on the upper surface.
  • the residual liquid removing mechanism according to the second embodiment includes a drain part 224A, 224B for receiving the liquid that has flowed down from the gradient part 222A, 222B, and drains the liquid received by the drain part to the outside. Drain pipes 226A and 226B for draining.
  • the residual liquid removing mechanism when the residual liquid falls from the blow nozzle pulled up from the transport plate 212 onto the upper surface of the transport plate 212 after the blow molding, the liquid that has fallen is inclined. It flows along 222A and 222B, falls to drains 224A and 224B, and is discharged therefrom through drain pipes 226A and 226B. Therefore, even if the transport plate 212 is sequentially transported to the injection station, the temperature control station, and the blow molding station, it is possible to reduce the possibility that the liquid remaining on the upper surface of the transport plate 212 falls onto the preform, and Inconvenience of molding can be prevented beforehand. Further, even when the liquid scattered from the container burst during the blow molding adheres to the upper surface of the transport plate 212, the same effect as described above can be obtained.
  • FIG. 12 shows a take-out core 228 provided with a residual liquid removing mechanism according to the third embodiment of the present invention.
  • the take-out core is provided at the take-out station 208 and is provided to release the container, which is a completed product, from the transfer plate at a normal position and posture.
  • the take-out core 228 includes a base 230, a shaft 232, and a tip 234.
  • a first air passage 236 and a second air passage 238 are provided so as to penetrate the base 230 at an angle, and are further extended from the base 230 through the shaft 232 in the longitudinal direction.
  • a third air passage 240 reaching the distal end 234 is provided.
  • the distal end 234 is provided with a fourth air passage 242 penetrating the distal end 234.
  • the third air passage 240 crosses the fourth air passage 242, and the third air passage 240 communicates with the fourth air passage 242.
  • the first air passage 236, the second air passage 238, and the third air passage 240 can be connected to a compressed air source and an air circuit (not shown).
  • the first to fourth air passages 236, 238, 240, 242, the compressed air source and the air circuit constitute blow air means (one form of a residual liquid removing mechanism).
  • the transport plate 212 holding the molded product 52 is moved from the blow molding station 206 to the removal station 208 (Step 500).
  • the molded product 52 whose mouth is held by the neck mold 220 attached to the transport plate 212 is disposed (the transport plate 212 and the neck mold 220 are (It is closed as shown in FIG. 13A).
  • the take-out core 228 provided in the take-out station 208 is started to descend (step 502).
  • the descending take-out core 228 passes through the opening 213 of the transport plate 212 and the opening 221 of the neck mold 220 and is inserted into the vicinity of the neck of the mouth 53 of the completed product.
  • the transport split plates 212A and 212B and the neck split dies 220A and 220B are separated (step 506).
  • the molded product 52 falls freely from the separated transport split plates 212A, 212B and the neck split dies 220A, 220B by gravity (step 508).
  • the take-out core 228 prevents the molded product 52 from being slanted or being pulled by one of the conveying members, appropriately dropping the molded product 52, and taking it out at a normal position and posture. It becomes possible.
  • compressed air is supplied from a compressed air source (not shown) into the first air passage 236, the second air passage 238, and the third air passage 240 of the take-out core 228 to separate the compressed split air. It is sprayed on 212A, 212B and the separated neck split molds 220A, 220B (step 510). As shown in FIG. 13B, the compressed air blown from the first air passage 236 and the second air passage 238 removes the liquid remaining on the upper surfaces of the transport split plates 212A and 212B, and removes the third air. The compressed air blown from the air passage 240 through the fourth air passage 242 removes the residual liquid attached to the inner wall surfaces of the neck split dies 220A and 220B.
  • step 512 the transport split plates 212A and 212B and the neck split dies 220A and 220B are closed (step 512), and the transport plate 212 is sequentially moved from the removal station to the injection station, the temperature control station, and the blow molding station (step 514). ), Returning to step 500 and repeating the same processing.
  • the transport plate 212 and the neck mold 220 are sequentially transported to the injection station, the temperature control station, and the blow molding station, the transport plate 212, the neck mold 220, the take-out core 228, etc.
  • This makes it possible to reduce the possibility that the liquid that has adhered or remained will drop onto the preform, thereby preventing the problem of blow molding.
  • the liquid scattered from the container ruptured during blow molding adheres to the transport plate 212, the neck mold 220, the take-out core 228, and the like, the same effect as described above can be obtained.
  • FIG. 15 shows a take-out pot 250 provided with a residual liquid removing mechanism according to the fourth embodiment of the present invention.
  • the take-out pot 250 is an auxiliary device that is arranged at the take-out station 208, grips a container that is a molded product, and transports the aligned container to a conveyor or the like that extends to the next process.
  • the take-out pot 250 includes a vacuum suction passage 252 penetrating the center of the bottom thereof, first and second air passages 254 and 256 penetrating from the bottom to the side wall. It has.
  • the vacuum suction passage 252 can be connected to a vacuum pump (not shown) via a vacuum suction circuit (not shown), and the first air passage 254 and the second air passage 256 are connected to a compressed air source and an air circuit (not shown). It is possible.
  • the first air passage 254, the second air passage 256, the compressed air source and the air circuit constitute blow air means (one form of a residual liquid removing mechanism).
  • the transport plate 212 holding the molded product 52 is moved from the blow molding station 206 to the removal station 208 (step 550).
  • the molded product 52 whose mouth is held by the neck mold 220 attached to the transport plate 212 is disposed (the transport plate 212 and the neck mold 220 are (It is closed as shown in FIG. 16A).
  • the take-out pot 250 provided in the take-out station 208 is arranged below the molded product 52 (step 552).
  • the molded product 52 is released from the separated transport split plates 212A and 212B and the neck split die 220, and is housed in the removal pot 250 (step 558).
  • the take-out pot 250 is moved to a predetermined take-out place (such as a conveyor extending to the next step) in a state in which the take-out pot 250 is housed, and the take-up pot 250 is turned upside down to take out the take-up completed product (step). 560).
  • Step 562 the transport split plates 212A and 212B and the neck split dies 220A and 220B are closed (step 562), and the removal pot 250 from which the molded product has been removed is moved below the original transport plate 212 and the neck die. (Step 564).
  • compressed air is blown from the first air passage 254 and the second air passage 256 of the take-out pot 250, and vacuum is sucked from the vacuum suction passage 252 (step 568).
  • the liquid adhering to the outer wall of the neck mold 220 is blown off by the compressed air, and the liquid is suctioned under vacuum and discharged to the outside.
  • the transport plate 212 is sequentially moved from the removal station to the injection station, the temperature adjustment station, and the blow molding station (step 570), and the process returns to step 550 and repeats the same processing.
  • the transport plate 212 and the neck mold 220 are sequentially transported to the injection station, the temperature control station, and the blow molding station, the liquid adhered or remained on the outer wall of the neck mold 220 Can be reduced, and the trouble of blow molding can be prevented beforehand. Further, even when the liquid scattered from the container burst during the blow molding adheres to the outer wall of the neck mold 220, the same effect as described above can be obtained.
  • a water repellent is applied to a transport component (for example, the transport plate 212, the neck mold 220) or a molded component (for example, the blow cavity mold 100) of a preform or a completed product shown in FIGS. It has a functional coating.
  • the coating having the water-repellent function makes it difficult for the residual liquid to adhere to the component, so that it is possible to reduce problems in forming the proform due to the residual liquid.
  • a further effect of removing the residual liquid can be obtained.
  • FIG. 18 shows a blow molding die 1 ′ according to the sixth embodiment.
  • blow molding die 1 ′ has substantially the same components as those of the blow nozzle 1 according to the first embodiment shown in FIG. 1, the reference numerals of the corresponding components are the same as those of the blow nozzle 1. The detailed description is omitted by using the same reference numerals with ', and only the differences will be described.
  • the stretching rod 3 (FIG. 1) of the blow nozzle 1 according to the first embodiment has the closing part 10
  • the stretching rod 3 ′ according to the present embodiment does not have the closing part. It has a straight rod body.
  • a gap 8 'through which fluid can pass is formed between the rod body and the inner peripheral wall 7' of the blow nozzle 2 'which defines a section of the nozzle fluid passage 7'.
  • the elongated rod 3 ′ has a first rod opening 9 ′ formed at a distal end portion (an end portion on the side where the preform is elongated) of the elongated rod and a second rod opening 9 ′ formed at a proximal end portion of the elongated rod. And a rod fluid passage 12 ′ formed in the extension rod so as to communicate the first rod opening 9 ′ and the second rod opening 10 ′. That is, the rod fluid passage 12 'extends from the first opening 9' to the second opening 10 '.
  • a liquid supply / blow circuit 13 for supplying a pressurized fluid for blow molding (a mixture of liquid and air or compressed air) to the blow nozzle 2 ′ is connected to the nozzle port 6 ′ via a supply path 14. You. Therefore, when the pressurized fluid is supplied from the liquid supply / blow circuit 13 to the nozzle port 6 'via the supply path 14, the supplied fluid passes through the gap 8' of the nozzle fluid passage 7 'and opens the nozzle opening 6'. It is injected from the part 5 'to the outside.
  • a drainage circuit 15 configured to be able to vacuum suck and drain the liquid is connected to the second opening 10 ′ of the extension rod 3 ′.
  • FIG. 20 shows an entire blow molding apparatus 80 for blow molding a preform set in a blow cavity mold 100 using the blow molding mold 1 'shown in FIG.
  • the blow molding device 80 includes a blow nozzle 2 ′ that can be moved up and down by a driving unit (not shown), a blow cavity mold 100 in which a preform to be blow molded is set, a liquid supply / blow circuit 13,
  • a supply path 14 connected to the nozzle port 6' of the blow nozzle and a drainage circuit 15 connected to the extension rod 3 'are provided.
  • the drainage circuit 15 includes a vacuum pump 75 and an on-off valve V5 provided between the vacuum pump 75 and the second opening 10 of the extension rod 3.
  • the liquid supply / blow circuit 13 shown in FIG. 20 is the same as the liquid supply / blow circuit 13 according to the first embodiment described with reference to FIG. 1 except that the residual liquid removing device 1A is omitted. And the detailed description is omitted.
  • the preform 50 whose temperature has been adjusted is carried into the blow molding station (206 in FIG. 4) (step 330).
  • the preform 50 is arranged between the blow split molds 100A and 100B which are arranged at intervals.
  • the blow molding die 1 ′ is disposed above the preform 50.
  • blow split molds 100A and 100B are closed (step 331).
  • the setting of the preform 50 in the blow cavity mold 100 is completed.
  • the blow split molds closed together form a blow cavity mold 100, and an opening 55 of the preform 50 is formed in an upper opening 101 of the blow cavity mold 100. Be attached.
  • the inner surface of the blow cavity mold 100 forms a molding surface 102.
  • the blow molding die 1 ′ is lowered, and the nozzle tip 4 ′ of the blow nozzle 2 ′ is fitted to the mouth 55 of the preform, specifically, fitted to the inner wall surface of the mouth 55 (Ste 332).
  • the blow split molds 100A and 100B may be closed after the nozzle tip 4 'of the blow nozzle 2' is fitted to the mouth 55 of the preform 50.
  • FIG. 22A shows a state where steps 330 and 332 are executed.
  • the state shown in FIG. 22A is a state in which preparation for blow molding is completed.
  • blow molding is performed by stretching the preform in the vertical and horizontal directions (step 334 in FIG. 24).
  • step 334 the extension rod 3 ′ is lowered, and a pressurized fluid containing a liquid and a gas is introduced from the liquid supply / blow circuit 13 to the nozzle port 6 ′, and the nozzle opening is opened.
  • a pressurized fluid is injected from the part 5 '.
  • the preform 51 being formed is mainly stretched in the vertical axis by the stretching rod 3 ′ and in the horizontal axis by the pressurized fluid.
  • the movement of the stretching rod 3 ' is stopped, the introduction of the fluid into the nozzle port 6' is stopped, and the blow molding is completed (step 336 in Fig. 24).
  • the molded product 52 (hollow container) is finally molded by the molding surface 102. At this time, the liquid 56 injected for blow molding remains in the molded product 52.
  • Step 338 compressed air is supplied from the liquid supply / blow circuit 13 to the port 6 'of the blow nozzle 2', and vacuum suction is performed from the second opening 10 'of the stretching rod 3' using the drainage circuit 15 ( Step 338).
  • the compressed air is ejected from the nozzle opening 5 ′, and the residual liquid 56 is flushed to the first opening 9 ′, and the residual liquid 56 flows with the air (compressed air) through the rod fluid passage 12 ′.
  • the residual liquid in the blow nozzle 2 ' is also blown off by the compressed air, and is sucked together with the residual liquid 56 and air in the container by vacuum suction.
  • step 338 is shown in FIG.
  • the compressed air is supplied from the port 6 ', but a circuit for exclusively supplying the compressed air may be separately provided in the blow nozzle 2'.
  • Step 340 the drainage of the liquid remaining in the blow nozzle 2 and the blow cavity mold 100 is completed.
  • the stretching rod 3 is moved away from the bottom of the blow cavity mold 100 (step 341 in FIG. 24).
  • the state of step 341 is shown in FIG.
  • the moving extension rod 3 ' reaches a predetermined position, the movement of the extension rod 3 is stopped.
  • Step 342 in FIG. 24 The state of step 312 is shown in FIG.
  • the connected blow split molds 100A and 100B are separated, and the state shown in FIG. 21A is obtained, and preparation for receiving the preform of the next cycle is completed.
  • the molded product 52 is taken out of the blow cavity mold 100 (Step 344), and is conveyed to the take-out station 208 shown in FIG. 4 (Step 346 in FIG. 24). In the removal station 208, the completed molded product 208 is removed as a product.
  • a preform for the next cycle is prepared (step 348 in FIG. 24), the process returns to step 330, and the above-described processing is repeated in the cycle.
  • the preparation of the preform in the next cycle is performed by injecting the preform in the injection station 202 in FIG. 4 and reheating (temperature adjustment) the preform in the temperature control station 204, and may be performed simultaneously with the steps 344 and 346. Good.
  • step 334 in FIG. 24 is the same as the flowchart in FIG. 10 relating to the first embodiment described above.
  • step 334 in FIG. 24 is started by moving (falling) the extending rod 3 ′ toward the bottom of the blow cavity mold 100 from the state of FIG. (Step 400).
  • the descending stretching rod 3 ' stretches the preform 50 in the vertical axis (step 402).
  • a fluid is introduced into the blow nozzle 2 'through the nozzle port 6' (Step 403), and the fluid is ejected from the nozzle opening 5 '(Step 404), and the preform is stretched in the horizontal axis by the fluid (Step 404). 408).
  • the injected fluid causes the preform to stretch not only in the horizontal axis direction but also in the vertical axis direction, but the vertical axis stretching is mainly performed by the stretching rod 3 ′.
  • the preform 51 stretched in this way is molded by the molding surface 102 of the blow cavity mold 100 (step 404). As shown in FIG. 22 (B), it will be understood that the preform 51 to be stretched reaches the molding surface 102, where it is molded.
  • the vertical axis stretching in step 402 is performed before the horizontal axis stretching in step 408 to prevent misalignment of the bottom of the final container, and the thickness distribution of the container is adjusted when the vertical axis stretching is performed first (preliminary stretching). This is because molding is easy. However, in the case of a thick container for accommodating cosmetics or the like in which the vertical axis stretching is rarely performed, or in a small container for storing pharmaceuticals, etc., the vertical axis and the horizontal axis may be simultaneously performed. It is thought that it is also possible to perform.
  • the operation when the liquid supply / blow circuit 13 shown in FIG. 20 is used for introducing the fluid into the blow nozzle 2 'in step 403 in FIG. 10 is as follows. That is, the water supply valve V3 is opened with the on-off valve V1, the air supply valve V2, and the vacuum suction valve V5 closed and the air release valve V4 opened, and a predetermined amount of liquid is stored in the storage unit 64. Next, after the storage of the liquid is completed, the water supply valve V3 and the air release valve V4 are closed. Open the air supply valve V2 and pressurize the liquid with compressed air.
  • the on-off valve V1 When the pressure in the storage section 64 reaches a predetermined pressure, the on-off valve V1 is opened, and a mixture (pressurized medium) composed of liquid and gas is introduced into the blow nozzle 2 'through the supply path 14 and the nozzle port 6'. The blow molding of the reform 50 is performed.
  • step 338 At the time of supplying compressed air to the blow nozzle 2 in step 338 (FIG. 23 (A)), air is supplied while the on-off valve V1 and the air supply valve V2 are opened, and the water supply valve V3 and the air release valve V4 are closed.
  • the generating unit 70 generates compressed air.
  • the compressed air generated at this time is supplied to the blow nozzle 2 through 68, V2, 64, V1, and 14.
  • the on-off valve V 1 of the drain circuit 15 is opened, and vacuum suction is performed by the vacuum pump 75.
  • the on-off valve V1 is closed, whereby even if the pressurized fluid enters through the first opening 9 ', the on-off valve V1 is shut off by the drain circuit 15, and the liquid leaks to the outside. There is no fear.
  • the air supply valve V2 is closed and the air release valve V4 is opened to open the molded product 52 (container) and excess gas on the liquid supply / blow circuit 13 circuit. Is exhausted, and the inside of the molded product 52 (container) is depressurized (another exhaust valve may be installed near the blow nozzle). After the pressure reduction is completed, the on-off valve V1 is closed.
  • compressed air is injected from the nozzle opening 5 ′ of the blow nozzle 2 ′ with the residual liquid in the molded product (container).
  • vacuum suction is performed from the distal end of the stretching rod 3 ', so that in a blow molding apparatus in which the liquid for blow molding is not directly filled in a container, it is possible to discharge the residual liquid very efficiently.
  • the liquid remaining in the blow nozzle 2 ′ can be drained at the same time. For this reason, the possibility that the residual liquid in the container and the blow nozzle 2 ′ falls on the preform can be reduced, and a molding defect can be prevented.
  • the residual liquid in the blow nozzle 2 ′ is removed from the temperature-adjusted pump in the next cycle. Eliminates the risk of falling into the renovation. In particular, the residual liquid is likely to fall because vibration occurs in the mold closing operation shown in FIG. 21 (B).
  • the residual liquid may fall onto the preform even in this case. Prevention can be surely prevented. Needless to say, in the present embodiment, it is possible to prevent the residual liquid from dropping onto the preform before reaching the state immediately before molding shown in FIG. Furthermore, according to the present embodiment, during the period from FIG. 22 (A) to FIG. 22 (B) (steps 400 to 401 in FIG. 10), before the pressurized fluid is supplied, the opened nozzle opening From 5 ′, the possibility that the residual liquid in the blow nozzle 2 ′ falls can be extremely reduced. In addition, in order to more reliably remove the residual liquid from the blow nozzle 2 ', a mechanism for removing the residual liquid may be separately connected to the blow nozzle 2'.
  • blow-molded product 52 or the blow nozzle 2 from which the residual liquid has been removed is used by the blow molding machine 200 or the like shown in FIG. Also, the liquid remaining in the blow nozzle 2 ′ does not drop, and the liquid does not drop to the preform via the parts or the like.
  • the blow chart shown in FIG. 24 is an example of a case where a rotary transfer type one-step type (hot parison type) blow molding machine 200 is used.
  • the blow chart is a 1.5-step type (cool parison type) or a two-step type (hot parison type).
  • the flow of the process including the drainage step according to the present invention can be arbitrarily and suitably changed depending on the case of using a blow molding machine (cold parison type) or a linear transport type.
  • the circuit configuration in FIG. 20 is also an example, and the present invention is not limited to the example.
  • the blow molding die 1 ′ in the sixth embodiment is a suitable example in the usage method in which the blow molding die 1 ′ is disposed above the blow cavity mold 100 and is inserted into the blow cavity mold 100 when descending.
  • the blow cavity mold is arranged upside down from that of the sixth embodiment, and the blow mold is not used.
  • a usage method is adopted in which the device is disposed below a blow cavity mold and is inserted into the blow cavity mold when ascending.
  • the blow molding die 1b according to the seventh embodiment corresponds to such blow molding.
  • FIG. 19 shows a blow molding die 1b 'according to a seventh embodiment of the present invention.
  • the blow molding die 1b 'according to the seventh embodiment has the same basic configuration as the blow molding die 1' according to the sixth embodiment. , Detailed description is omitted, and different parts will be described in detail.
  • a liquid supply / blow / drain circuit 16 is connected to the port 6 'of the blow nozzle 2' of the blow mold 1b 'according to the seventh embodiment.
  • the liquid supply / blow / discharge circuit 16 includes a liquid supply / blow circuit 13 used in the sixth embodiment, a liquid discharge circuit 17 for vacuum-suctioning and discharging the liquid remaining in the container, It has. Further, an air blow circuit 18 for injecting compressed air into the container is connected to the second opening 10 'of the extension rod 3' of the blow molding die 1b '.
  • the blow molding die 1b 'of the seventh embodiment not only the mixture of liquid and gas is introduced into the blow nozzle via the nozzle port 6', but also the residual liquid in the container is sucked.
  • the compressed air in the drainage is blown through the stretching rod 3 '.
  • the introduction of the mixture into the blow nozzle in the liquid supply / blow circuit 13 and the discharge of the residual liquid in the drain circuit 17 are performed by switching the opening / closing operation by the open / close valves V1 and V6.
  • FIG. 25 shows an internal configuration example of the liquid supply / blow / drain circuit 16 and the air blow circuit 18.
  • a portion of the liquid supply / blow / drain circuit 16 corresponding to the liquid supply / blow circuit 13 has the same configuration as that of the sixth embodiment, and thus detailed description is omitted.
  • the above-described opening / closing valve V6 is provided in a pipe branched from the supply path 14, and a vacuum suction circuit 76 and a vacuum pump 74 are provided downstream of the opening / closing valve V6, and these constitute the drainage circuit 17. ing.
  • the air blow circuit 18 includes a high-pressure gas source 67, an air supply valve V7 for controlling the supply of compressed air from the high-pressure gas source 67 to the extension rod of the blow molding die 1b, and an air supply valve V7.
  • a check valve 77 provided between the rod 3 and the second opening 10. The check valve 77 prevents the liquid from entering the air blow circuit 18 even if the liquid enters the rod fluid path from the first opening 9 during the molding blow.
  • the blow molding die 1b ′ is disposed below the blow cavity die 110 and moves up and down by a driving unit (not shown).
  • the blow molding die 1b ' is inserted into the blow cavity mold 110 when ascending, and is released from the blow cavity mold 110 when descending.
  • the blow molding die 1b according to the seventh embodiment is used in, for example, a blow molding machine 201 shown in FIG.
  • the blow molding machine in FIG. 27 is a 1.5-step type blow molding machine that intermittently rotates and transports a preform, and includes seven main processes. These seven steps are preform injection molding / primary cooling step, secondary cooling step, preform temperature equilibrium / stabilization / pitch adjustment step, reheating step, preform temperature equilibrium / stabilization / special processing step, stretch blow The molding step and the take-out step.
  • the blow molding machine 201 includes an injection molding / cooling / pitch adjusting station 203 having an injection mold 211 of the preform 50 and a transport plate 213, a reheating station 205 having an infrared heating means 215, and a blow molding having a blow cavity mold 110.
  • a station 206 and a take-out station 208 are provided.
  • the blow molding die 1b ′ according to the seventh embodiment is similar to the sixth embodiment except that the positional relationship between the blow molding die and the blow cavity die is upside down from FIG. It can operate according to the flow of FIG.
  • FIG. 26 is a diagram corresponding to FIG. 23A when step 338 of FIG. 24 is executed.
  • the residual liquid 56 remains in the molded product 52.
  • compressed air is introduced from the air blow circuit 18 (FIG. 19) into the second opening 10 ′ of the extension rod 3 ′, and the on-off valve V 1 is closed and the on-off valve V 6 is opened to release the drainage circuit 17 (FIG. 19). , FIG. 25), and vacuum suction is performed from the nozzle port 6 ′.
  • the compressed air is ejected from the first opening 9 ′ to push the residual liquid 56 to the nozzle opening 5 ′, and the residual liquid 56 flows through the nozzle fluid passage 7 ′ together with the air (compressed air).
  • the nozzle port 6 ' Through the nozzle port 6 '.
  • the supply of the compressed air and the vacuum suction are continued for a certain period of time, so that the residual liquid in the blow nozzle is also blown off and sucked by the vacuum suction. Further, the pressure reduction inside the blow nozzle 2 ′ and the blow cavity mold 110 during vacuum suction is alleviated by the pressure of the compressed air, and the blow nozzle 2 ′ and the blow cavity mold 110 are prevented from being crushed by the atmospheric pressure.
  • the residual liquid can be discharged very efficiently even in the blow molding in which the blow molding die 1b 'is arranged below the blow cavity mold.
  • FIGS. 29 and 30 show two split molds (1a, 1b) constituting a blow cavity mold according to an eighth embodiment of the present invention used for blow molding a preform with a fluid containing at least a liquid. It is shown.
  • FIGS. 31 and 32 show a blow cavity mold 1 ′′ according to an eighth embodiment in which two split molds 1a and 1b are connected.
  • a component number relating to one of the mold halves is given the reference numeral a, and a corresponding component requirement of the other mold half is given the same reference number b.
  • a and b are assigned to components that are shared by the two split dies and components that are connected to each other by the two split dies to form one component of the blow cavity type. In this case, the same reference numerals as those of the connected components are added with ".”
  • the two split dies 1a and 1b are symmetrically configured and have the same components.
  • the blow cavity mold 1 ′′ according to the embodiment is arranged such that the bottom surface 23 located on the side opposite to the mouth portion 21 (21a, 21b) faces down during blow molding.
  • one split mold 1a has two connecting surfaces 18a, 19a (parting surfaces), and a blow cavity mold is provided between the two connecting surfaces (18a, 19a). It further has a partial molding surface 20a which defines a part of the molding surface of 1 ".
  • the other split mold 1b has coupling surfaces 18b, 19b and is between the two coupling surfaces (18b, 19b). Further has a partial molding surface 20b that defines another part of the molding surface of the blow cavity mold 1 ′′.
  • One connecting surface 18a (18b) of the split mold 1a (1b) has lateral grooves 2a (2b), 3a (3b), 4a (4b), and 5a that open on the molding surface 20a (20b) of the blow cavity mold 1 ′′.
  • (5b) is formed, and the other connecting surface 18a (18b) of the split mold 1a (1b) has lateral grooves 6a (6b), 7a (7b), which open on the molding surface 20a (20b) of the blow cavity mold 1.
  • 8a (8b) and 9a (9b) are formed, preferably the lateral grooves 2a to 9a (2b to 9b) are oriented substantially horizontally when the blow cavity mold 1 "is arranged for blow molding.
  • the number of the lateral grooves is four on one connection surface, but the present invention is not limited to this example, and the number may be less or more than four. Of course.
  • one connecting surface 18a (18b) of the split mold 1a (1b) is connected to the lateral grooves 2a (2b), 3a (3b), 4a (4b), and 5a (5b), and the eighth embodiment.
  • the vertical groove 10a (10b) which forms the opening 14a (14b) is formed in the bottom surface 23 which is the lower surface of the blow cavity mold 1 "at the time of blow molding.
  • the other connecting surface 19a (19b) is formed.
  • a vertical groove 11a (11b) which is connected to the horizontal grooves 6a (6b), 7a (7b), 8a (8b), 9a (9b) and forms an opening 15a (15b) on the bottom surface 23 is formed.
  • the lateral grooves 10a (10b), 11a (11b) extend substantially vertically when the blow cavity mold 1 "is arranged for blow molding.
  • drainage sections 36, 37 for receiving and draining liquid flowing down from the openings.
  • the drainage units 36 and 37 can be configured using, for example, a reservoir that receives the liquid that has flowed down and a drainage passage that allows the liquid accumulated in the reservoir to escape to the outside.
  • At least one longitudinal groove 10a (10b) is provided on one connecting surface 18a (18b) of the split mold 1a (1b) radially outside of the longitudinal groove 10a (10b) (see FIGS. 29 and 30).
  • the sealing groove 12a (12b) extending over the entire height of the split mold
  • the other connecting surface 19a (19b) of the split mold 1a (1b) has at least the length of the vertical groove 11a (11b) radially outside the vertical groove 11a (11b) (FIG. 29, FIG.
  • the sealing groove 13a (13b) extending over the entire height of the split mold) is formed.
  • a sealing member 26 is disposed between the sealing grooves 12a and 12b
  • a sealing member 27 is disposed between the sealing grooves 13a and 13b.
  • the split mold 1a (1b) is formed with an opening 21a (21b) of the blow cavity mold 1 "and a bottom hole 22a (22b) into which the bottom mold 24 is fitted. It has a molding surface 25 at the bottom of the container.
  • the horizontal grooves (2a to 9a) and the horizontal grooves (2b to 9b) are aligned to form the horizontal passages 2 ′′ to 9 ′′.
  • the vertical grooves (10a, 11a) and the vertical grooves (10b, 11b) are respectively aligned to form the vertical passages 10 ′′, 11 ′′.
  • the hollow passage is used as an exhaust passage (air vent) for the air remaining in the blow cavity mold 1 "and a passage for escaping the pressurized medium when the molded product is ruptured during blow molding. .
  • the sealing grooves (12a, 13a) and the sealing grooves (12b, 13b) are aligned with each other to form a sealing passage, and the sealing members 26, 27 are arranged in the passage. Accordingly, even when the preform is blow-molded using a liquid or a gas-liquid mixture as the pressurized medium, the liquid is irregularly scattered to the outside (periphery and inside the apparatus) of the blow cavity mold 1 ". Can be suitably prevented.
  • FIG. 35 shows a configuration example of a blow molding apparatus 100 for blow molding a preform 50 using the blow cavity mold 1 ′′ according to the eighth embodiment.
  • the split dies 1 a and 1 b are fixed to the mold clamping plate 106 via the fixing plate 105. Is connected to a hydraulic actuator 101 via a drive rod 102. By driving the hydraulic actuator 101, the split dies 1a and 1b can move in a horizontal plane (the direction of the arrow Y), thereby closing and opening the blow cavity mold 1 ′′.
  • a roller 110 having a rotation axis in the X direction perpendicular to the Y direction is attached to the block fixed below the fixed plate 105 and the mold clamping plate 106.
  • the roller 110 can roll on the bottom surface of the guide block 104 fixed to the machine base 120 when the blow cavity mold 1 is closed. To prevent the split molds 1a and 1b from rising along the parting line.
  • a bottom die 24 is arranged, and the bottom die 24 is fixed to a bottom die fixing plate 103 connected to a lifting mechanism (not shown) for raising and lowering the bottom die.
  • the above-described drainage units 36 and 37 can be disposed on, for example, the machine base 120.
  • a through-hole (not shown) or the like is provided in the bottom mold fixing plate 103, and the above-described drainage unit is provided in the through-hole. 36 and 37 may be connected.
  • a rotary disk 107 is disposed above the split molds 1a and 1b, and a lip 108 (neck type) is provided on the rotary plate 107, and the preform 50 is held by the lip.
  • a blow nozzle 30 for ejecting a pressurized medium containing at least a liquid can be inserted into the lip mold 108.
  • the split molds 1a and 1b of the blow cavity mold 1 "are closed with the lip mold 108 therebetween, and a blow cavity for blow molding the preform 50 is formed with the bottom mold 24 raised. By injecting the pressurized medium, the preform 50 disposed in the blow cavity can be blow-molded.
  • the operation of the blow cavity mold 1 ′′ according to the eighth embodiment will be described with reference to FIG.
  • (A) before blow molding the preform 50 is set in the mouth 21 of the blow cavity mold 1, and the tip 31 of the blow nozzle 30 is adapted to the preform 50.
  • a pressurized medium 60 which is either a liquid or a mixture of a liquid and a gas (compressed air)
  • a pressurized medium 60 is injected from the nozzle opening 32 of the blow nozzle 30 to stretch the preform.
  • the blow nozzle 30 has a stretching rod (not shown)
  • the vertical stretching using the stretching rod is also performed.
  • the air in the cavity of the blow cavity mold 1 ′′ flows from the horizontally arranged horizontal passages (2 ′′ to 9 ′′) to the vertically arranged vertical passages (2 ′′ to 9 ′′). 10 ", 11") and escape from the openings (14 ", 15”), so that the stretching of the preform 50 is carried out successfully.
  • the blow nozzle 50 detects the rupture by a sensor (not shown), for example. At this point, the injection of the pressurized medium is stopped.
  • the liquid 63 scattered from the ruptured preform 55 flows into horizontally arranged horizontal passages (2 ′′ to 9 ′′), respectively, merges into vertically extending vertical passages (10 ′′, 11 ′′), and vertically. It falls and flows out of the openings (14 ", 15").
  • the liquid 64 that has flowed out is received by the drainage units 36 and 37 and drained. The drained liquid may be collected again as a liquid for blow molding.
  • FIG. 40 As described above, according to the blow cavity mold 1 ′′ according to the eighth embodiment, even if the liquid 62 scattered due to the rupture of the preform flows into the air inlet which also functions as the air vent according to the related art, FIG. As in the prior art shown in FIG. 40, the liquid is collected in the hollow passage without falling around the side surface of the blow cavity mold 1 "and falls downward from the air outlet to be drained / collected. Moreover, since the seal members 26 and 27 are provided on the connecting surfaces of the split dies 1a and 1b radially outside the vertical passage, leakage of liquid to the surroundings can be significantly reduced.
  • the blow cavity mold 1 ′′ shown in FIG. 29 is arranged such that the bottom surface 23 located on the side opposite to the mouth portion 21 faces down during blow molding. Some of them are arranged upside down from those in Fig. 29 at the time of blow molding, and the present invention can be applied to such a blow cavity mold. This will be described below.
  • FIG. 34 shows a blow cavity split mold 1c (1d) according to a ninth embodiment of the present invention.
  • the same reference numbers are used for the constituent elements corresponding to the eighth embodiment, and c is added to the reference number for the constituent elements relating to one split mold, and the corresponding configuration of the other split mold is used. Requirements are given the same reference number with the letter d.
  • both the components c and d are assigned to the components shared by the two split dies and the components that are connected to each other by the two split dies to form one component of the blow cavity type. No, use the same reference number as the concatenated constituent elements or the reference number with "".
  • the two split dies 1c and 1d are configured symmetrically. And have the same configuration requirements.
  • the blow cavity mold according to the ninth embodiment is arranged such that the surface 28 on the side where the mouth portions 21 (21a, 21b) are formed is the lower surface during blow molding.
  • Other configurations are the same as in the eighth embodiment.
  • the liquid 62 scattered from the ruptured preform 55 is formed by horizontal passages (horizontal grooves 2c to 9c and 2d to 9d). Into the vertical passages (the passages formed by the vertical passages 10c and 10d, 11c and 11d), and fall vertically to form the openings (14c and 14d, 15c, 15d). Out of the opening). The outflowing liquid is received by the drainage units 36 and 37, and is drained and collected.
  • the blow cavity molds according to the first and ninth embodiments are for blow molding one molded product with one mold. However, it is also possible to configure the mold so that a single mold blow-molds a plurality of molded articles at a time. This will be described as a tenth embodiment with reference to FIGS. 36 and 37.
  • FIG. 36 is a top view of the blow molding apparatus shown in FIG. 35, in which the split molds 200a and 200b of the blow cavity mold 200 ′′ according to the tenth embodiment are applied.
  • the same components as those of the embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
  • the split molds 200a and 200b are obtained by integrally integrating a plurality of split molds 1a and 1b according to the eighth embodiment in the lateral direction (the number is four in the example of the drawing, but is not limited to this). They are connected and fixed to the fixing plate 105. Drainage units 40, 41, 42, 43, and 44 for draining the liquid that has flowed down are respectively arranged below the boundaries of the adjacent split molds.
  • FIG. 37 is a schematic top view of the blow cavity mold 200 ′′ when the mold dies 200a and 200b are closed.
  • the mold dies 200a and 200b each include a plurality of blow cavities that define each blow cavity surface.
  • Mold sections 201 ", 202", 203 ", 204" are formed.
  • Each of the blow cavity mold sections has a horizontal passage (2 “to 9") and a vertical passage (2) as in the eighth embodiment. 10 ", 11").
  • each vertical passage is not limited to this example.
  • a seal member may be provided on the outer side in the direction, and the tenth embodiment is also applicable to a case where a plurality of blow cavity dies of the ninth embodiment are connected.
  • the plurality of blow cavity dies are integrally connected in the side direction.
  • the plurality of blow cavity dies can be connected in a separable manner. This will be described as an eleventh embodiment with reference to FIGS.
  • the same components as those in the eighth and tenth embodiments are denoted by the same reference numerals, and the detailed description is omitted.
  • the blow cavity mold 300 has blow cavity molds 301, 302, 303, 304 having the same configuration as the blow cavity mold 1 ′′ according to the eighth and ninth embodiments.
  • the blow cavity molds 301, 302, 303, and 304 respectively include a split mold 301a (301b), a split mold 302a (302b), and a split mold.
  • the mold 303a (303b) and the split mold 304a (304b) are separably fixed to the fixing plate 105 by fixing means such as screws.
  • the preform 50 is not limited to a preform injection-molded at the injection molding station 202, and may be a primary blow-molded product obtained by subjecting the preform to primary blow-molding. That is, the blow cavity mold 100 shown in FIGS. 3 to 5 may be a secondary blow cavity mold, and the present invention is applied to blow molding a secondary blow molded product (molded product) from a primary blow molded product. May be applied.
  • the fitting of the nozzle tip 4 to the mouth of the preform in step 302 can be performed by indirectly inserting the nozzle tip 4 directly into the mouth of the preform 50 as shown in FIGS.
  • “fit” includes a mode in which the preform is in contact with the top surface, or a mode in which the preform is not in contact with the preform (for example, a mode in which the preform is in contact with the upper surface of the blow mold or a mode in which the preform is conveyed with a conveying member).
  • blow cavity mold 100 is not limited to the examples shown in FIGS. 3 to 5, and includes a neck mold and a bottom for molding and holding the neck or bottom of the preform 50 in addition to the blow cavity split molds 100A and 100B.
  • a mold may be used.
  • the closing portions 10 and 10b are formed as large diameter portions of the rod body. However, the closing portions are inserted into the fluid passage 7 as well as the closing portions. A mode in which the outer peripheral wall of the nozzle body around the injection port is covered is also conceivable.
  • a mixture of liquid (water) and gas (compressed air) is used as the pressurized medium.
  • liquid (water) that is not the contents (filling material) of the container is used.
  • the present invention can also be applied to drainage in blow molding in which is used as a pressure medium.
  • the preform 50 is not limited to a preform injection-molded at the injection molding station 202, and may be a primary blow-molded product obtained by subjecting the preform to primary blow-molding. That is, the blow cavity mold 100 shown in FIGS. 20 to 5 may be a secondary blow cavity mold, and the present invention is applied to blow molding a secondary blow molded product (molded product) from a primary blow molded product. May be applied.
  • the fitting of the nozzle tip 4 to the mouth of the preform in step 332 includes the indirectly inserting the nozzle tip 4 directly into the mouth of the preform 50 as shown in FIGS.
  • “fit” includes a mode in which the preform is in contact with the top surface, or a mode in which the preform is not in contact with the preform (for example, a mode in which the preform is in contact with the upper surface of the blow mold or a mode in which the preform is conveyed with a conveying member).
  • blow cavity molds 100 and 110 are not limited to the examples of FIGS. 20 to 23, 26, and 27, and in addition to the blow cavity split molds 100A, 100B and 110A, 110B, a neck portion of the preform 50 or A neck mold and a bottom mold for shaping and holding the bottom may be used.
  • the first opening 9 ', the rod fluid passage 12', and the second opening 10 ' are formed in the extension rod 3'.
  • the configuration of the blow nozzle 2 ' can be arbitrarily and suitably changed.
  • the extension rod 3 ' passes through a section of the nozzle fluid passage 7', but the extension rod 3 'is inserted through a solid portion of the rod body 2' to extend the rod. It is also conceivable that the rod 3 'does not pass through the nozzle fluid passage 7'.
  • the pressurized medium and the compressed air are ejected from the common nozzle opening 5, but as long as the pressurized medium and the compressed air can be ejected into the preform, separate openings are formed. It may be provided.
  • the liquid supply / blow circuit 13 for the pressurized medium and the drain circuit 17 are switchably connected to the common port 6 ′ and the nozzle fluid passage. Different ports and nozzle fluid passages may be used as long as the medium can be ejected or the residual liquid in the container can be suctioned.
  • the present invention is not limited to the form of the blow nozzle 2 'as long as it is an injection mold for injecting a fluid containing at least a liquid into the inside of the preform.
  • the number of the first openings 9 ′, the rod fluid passages 12 ′, and the second openings 10 ′ is not limited to one, but may be plural.
  • the orientations and positions of the first opening 9 ′, the rod fluid passage 12 ′, and the second opening 10 ′ can be appropriately configured other than the examples shown in the drawings.
  • the distal end portion of the extension rod in which the first opening 9 ′ is formed has the following modification (FIG. 28B).
  • To (D)) are also conceivable.
  • the first opening is not limited to the examples (A) to (D) in FIG.
  • the blow cavity molds shown in FIGS. 29 to 34 have the bottom mold 24, but do not have the bottom mold 24, and may be configured only with the first and second split molds. It is. Further, a neck mold may be provided instead of the bottom mold 24, and both a bottom mold and a neck mold may be provided in addition to the first and second split molds. In any case, the present invention is applicable.
  • the two split dies are connected.
  • the present invention can be applied to a case where three or more split dies are connected to each other. it can.
  • a horizontal groove and a vertical groove are provided on two adjacent split mold connecting surfaces, respectively.
  • the seal members 26, 27 and the like are arranged in the seal passage formed by connecting the two split dies.
  • the seal member is provided on one or both of the two connecting surfaces that are connected. A member may be attached.
  • a resilient seal member may be accommodated in the groove, and the seal member may be compressed by pressure during connection.
  • split dies 1a and 1b (1c and 1d) are each configured to be symmetrical, but may be configured to be asymmetrical as long as the vertical passage and the horizontal passage are formed.
  • the preform 50 is not limited to the first preformed injection-molded preform, but may be a primary blow-molded product in which the preform is firstly blow-molded. That is, the blow cavity molds 1 ′′ and 1b ′′ shown in FIGS. 29 and 33 may be secondary blow cavity molds, and are used when blow molding a secondary blow molded product (molded product) from a primary blow molded product.
  • the present invention may be applied to
  • the nozzle tip 31 is directly inserted into the mouth of the preform 50. It is also conceivable that the device is mounted through an indirect member or does not touch the device.
  • the horizontal passage and the vertical passage have been described as preferred examples of the configuration in which the blow cavity mold extends in the horizontal direction and the vertical direction when the blow cavity mold is arranged for blow molding, the advantageous effects of the present invention can be obtained. As far as possible, it may be inclined or shifted from the horizontal direction and the vertical direction.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

La présente invention empêche le liquide résiduel de tomber sur une préforme ou un article moulé. Un dispositif d'élimination de liquide résiduel 1A est pourvu : d'une pompe à vide 74 ; d'un circuit d'aspiration sous vide 76 ; d'une valve d'aspiration sous vide V5 ; et d'un canal d'alimentation 14. Le canal d'alimentation 14 est relié à un orifice 6 d'une buse de soufflage. La buse de soufflage 1 est configurée pour pouvoir être ouverte et fermée. Après moulage par soufflage d'une préforme, la buse de soufflage 1 est fermée, la valve d'aspiration sous vide V5 est contrôlée de "fermée" à "ouverte", et la pompe à vide 74 est actionnée. Par cette procédure, le liquide restant dans la buse de soufflage 1 est aspiré, par une pression négative créée par la pompe à vide 74, à partir de l'orifice 6 dans le circuit d'aspiration sous vide 76 par l'intermédiaire du canal d'alimentation 14.
PCT/JP2019/025564 2018-06-27 2019-06-27 Mécanisme d'élimination de liquide résiduel, moule de moulage par soufflage, moule de cavité de soufflage et méthode d'élimination de liquide l'utilisant Ceased WO2020004539A1 (fr)

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JP2023034329A (ja) * 2021-08-30 2023-03-13 株式会社吉野工業所 液体入り容器の製造方法
JP2023034330A (ja) * 2021-08-30 2023-03-13 株式会社吉野工業所 液体入り容器の製造方法

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JP2023034329A (ja) * 2021-08-30 2023-03-13 株式会社吉野工業所 液体入り容器の製造方法
JP2023034330A (ja) * 2021-08-30 2023-03-13 株式会社吉野工業所 液体入り容器の製造方法
JP7594511B2 (ja) 2021-08-30 2024-12-04 株式会社吉野工業所 液体入り容器の製造方法
JP7678731B2 (ja) 2021-08-30 2025-05-16 株式会社吉野工業所 液体入り容器の製造方法

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