WO2020008770A1 - Dispositif d'injection de machine à couler sous pression et procédé de coulée - Google Patents

Dispositif d'injection de machine à couler sous pression et procédé de coulée Download PDF

Info

Publication number
WO2020008770A1
WO2020008770A1 PCT/JP2019/021911 JP2019021911W WO2020008770A1 WO 2020008770 A1 WO2020008770 A1 WO 2020008770A1 JP 2019021911 W JP2019021911 W JP 2019021911W WO 2020008770 A1 WO2020008770 A1 WO 2020008770A1
Authority
WO
WIPO (PCT)
Prior art keywords
sleeve
suction
plunger
vacuum
molten metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2019/021911
Other languages
English (en)
Japanese (ja)
Inventor
直樹 石橋
祐一郎 釼
工成 村上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ube Machinery Corp Ltd
Original Assignee
Ube Machinery Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2018237979A external-priority patent/JP7127527B2/ja
Application filed by Ube Machinery Corp Ltd filed Critical Ube Machinery Corp Ltd
Priority to CN201980026253.7A priority Critical patent/CN111989176A/zh
Priority to KR1020207029532A priority patent/KR102677366B1/ko
Publication of WO2020008770A1 publication Critical patent/WO2020008770A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould

Definitions

  • the present invention relates to an injection device that injects a molten metal toward a cavity of a die casting machine by a plunger that can advance and retreat inside a sleeve, and a casting method using the injection device.
  • Patent Document 1 describes a die casting machine that suctions the inside of a sleeve using a vacuum pump.
  • Such a die casting machine includes first to fourth suction devices for suctioning the inside of the sleeve and the cavity of the mold. A first suction device and a second suction device are used for suction inside the sleeve.
  • the first suction device sucks the inside of the sleeve through a hole located near the pouring port into which the molten metal such as an aluminum alloy is injected and ahead of the pouring port.
  • the second suction device sucks a closed space formed between a constricted portion between the tip of the plunger and the flange of the plunger rod and the inner peripheral surface of the sleeve, thereby forming a constricted portion of the tip and an inner peripheral portion of the sleeve.
  • the inside of the sleeve is sucked through a gap between the sleeve and the surface.
  • the suction of the closed space formed by the constriction is performed through a through hole formed in the flange of the plunger rod along the axial direction.
  • Patent Literature 1 after the molten metal is injected into the sleeve, when the plunger advances to a position where the pouring port is closed by the tip of the plunger, first, the first suction device removes the chip in the sleeve through the hole near the pouring port. Also sucks the gas in the space in front. At this time, the gas in the cavity is also sucked through the front space in the sleeve. Next, when the plunger advances to a position where the hole near the pouring port is closed by the tip, the operation shifts to suction by the second suction device.
  • the second suction device suctions the closed space defined between the constricted portion of the plunger and the inner peripheral surface of the sleeve through the axial through hole of the flange of the plunger rod, so that the front of the tip in the sleeve is suctioned. Aspirate space.
  • the suction in the cavity is started by the third suction device.
  • the inside of the cavity is sucked through the sleeve by the first suction device, so that the degree of vacuum in the cavity is prevented from becoming higher than the degree of vacuum in the sleeve. Is suppressed.
  • the suction hole may be closed due to the adhesion of the molten metal, or the molten metal component ( In some cases, the deposition of molten metal scum may cause a decrease in suction efficiency.
  • ⁇ Molten metal rampage '' means that, for example, when the outside air blows in front of the chip from the rear end of the sleeve through the radial gap between the plunger and the sleeve, the molten metal foams and scatters, or the molten metal surface shakes violently.
  • the present invention is an injection device that includes a sleeve into which molten metal is supplied, and a plunger that can advance and retreat inside the sleeve, and injects the molten metal toward a cavity of a die casting machine by the plunger. Is retracted radially inward with respect to the inner peripheral portion of the sleeve, and a suction concave portion continuous in the circumferential direction is defined, so that a space ahead of the front end of the chip and the inside of the suction concave portion can be suctioned.
  • the inside of the sleeve is sucked through the penetrating portions which penetrate the sleeve at the first predetermined position of the sleeve in the retreating direction of the plunger and at the second position separated rearward from the first position. It is possible, and the opening area of the penetration portion at the first location is larger than the opening area of the penetration portion at the second location.
  • “Inside of the suction concave portion” means a space defined between the tip and the sleeve.
  • the first penetrating portion is used for suctioning a space in front, and the second penetrating portion is used for suction inside the suction recess.
  • the present invention is a casting method using an injection device that injects molten metal toward a cavity of a die casting machine by a plunger that can advance and retreat inside a sleeve to which the molten metal is supplied, and a tip of the plunger includes:
  • the suction concave portion is retracted radially inward with respect to the inner peripheral portion of the sleeve, and is defined by a suction concave portion that is continuous in the circumferential direction.
  • the inside of the sleeve can be sucked through the penetrating portions penetrating the sleeve both inside and outside, and the opening area of the penetrating part at the first point is smaller than the opening area of the penetrating part at the second point. And communicating with the inside of the suction recess while reducing the pressure in the front space by suction through the first penetrating portion communicating with the space in front of the front end of the chip. It characterized thereby depressurized by sucking the inside of the suction recess via the through portion of the second positions that.
  • FIG. 2 is a side view in which a part of the die casting machine according to the embodiment of the present invention is broken.
  • FIG. 2 is a diagram schematically showing a system for sucking the inside of a sleeve of an injection device provided in the die casting machine shown in FIG. 1.
  • 6 is a flowchart illustrating an example of a sleeve vacuum process.
  • FIG. 2A is a partially cutaway side view illustrating a main part of the injection device of the die casting machine illustrated in FIG. 1.
  • (B) is a sectional view of the injection device at the position IVb in (a). It is a schematic diagram which shows an example of the penetration part formed in the 1st location and the 2nd location of a sleeve, respectively.
  • A)-(c) is a figure which shows a series of steps of sleeve vacuum suction by the die casting machine shown in FIG.
  • FIG. 1 is a schematic side view (partially including a cross-sectional view) of a die casting machine 100 including an injection device 1 according to an embodiment of the present invention.
  • the die casting machine 100 is directed to a movable plate 4 on which a movable mold 22 is installed, a fixed plate 5 on which a fixed mold 21 is installed, a machine base 8 supporting the movable plate 4 and the fixed plate 5, and a cavity 23.
  • An injection device 1 for injecting molten metal 18 and a control device 3 for controlling the operation of each part of the die casting machine 100 are provided.
  • the die casting machine 100 evacuates the cavity 23 and the inside of the sleeve 11 of the injection device 1 in order to suppress the occurrence of a cast cavities (entrance cavities) due to the entrainment of gas into the molten metal 18.
  • the movable platen 4 moves along the tie bar 7 with respect to the fixed platen 5 so as to be able to advance and retreat.
  • a cavity (product part) 23 is formed therebetween.
  • a casting 18 is manufactured by injecting and filling a cavity 18 with a molten metal 18 such as aluminum or an aluminum alloy.
  • the movable platen 4 includes an extrusion plate 41 to which an extrusion pin 42 is attached.
  • the injection device 1 is provided on the fixed platen 5.
  • the injection device 1 includes a sleeve 11 into which the molten metal 18 is supplied, and a plunger 12 that can advance and retreat with respect to the sleeve 11 inside the sleeve 11.
  • the injection device 1 injects the molten metal 18 toward the cavity 23 by the plunger 12.
  • the front end of the sleeve 11 penetrates through the fixed platen 5 and fits into the hole 10 provided in the fixed mold 21.
  • the rear end side of the sleeve 11 projects outside the fixed platen 5 and extends rearward in the horizontal direction.
  • a pouring port 13 into which the molten metal 18 is injected is provided at a rear end side of the sleeve 11.
  • a hot water storage chamber is formed including the inside of the sleeve 11 and the hole 10 of the fixed mold 21. This hot water storage chamber communicates with the cavity 23 via the runner 24 and the gate 25.
  • the front in the moving direction of the plunger 12 when injecting the molten metal 18, that is, the side closer to the cavity 23 is defined as “front”, and the side farther from the cavity 23 is defined as “rear”. .
  • the plunger 12 generally includes a plunger rod 19 and a plunger tip 20 provided on the front side of the plunger rod 19.
  • the direction in which the plunger 12 moves forward and backward is defined as the moving direction D1.
  • the control device 3 controls the driving of the hydraulic cylinder that moves the plunger 12 forward and backward while detecting the position of the plunger 12 in the forward and backward direction D1 with a sensor or the like.
  • the detection of the position of the plunger 12 is performed, for example, by detecting a mark provided on the piston rod corresponding to the stroke of the hydraulic cylinder with a non-contact sensor.
  • the injection device 1 is provided with a vacuum suction system 2 that suctions the inside of the sleeve 11.
  • the vacuum suction system 2 reduces the pressure inside the sleeve 11 by suction using a vacuum pump 37 and a vacuum tank 36.
  • two through portions (suction ports) 14 and 15 penetrating through the inside and outside of the sleeve 11 are provided so that the gas inside the sleeve 11 can be sucked by the vacuum suction system 2.
  • the sleeves 11 are arranged side by side in the axial direction (D1). These penetrating parts 14 and 15 are formed on the upper part of the sleeve 11 so as to be located above the surface of the molten metal 18 supplied inside the sleeve 11.
  • the penetrating portion 15 penetrates the peripheral wall of the sleeve 11 in the thickness direction at a predetermined first location C1 (FIG. 4A) of the sleeve 11 in the reciprocating direction D1.
  • the penetrating portion 14 penetrates the peripheral wall of the sleeve 11 in the thickness direction at a second location C2 (FIG. 4A) remote from the first location C1.
  • the vacuum suction system 2 depressurizes the inside of the sleeve 11 to a predetermined degree of vacuum by evacuating the gas in the sleeve 11 through the penetrating portions 14 and 15.
  • the vacuum suction system 2 can depressurize the inside of the sleeve 11 and the cavity 23.
  • the die casting machine 100 typically includes another vacuum suction system (not shown) for directly reducing the pressure of the cavity 23 through a suction path provided in a mold.
  • a vacuum suction system is, for example, air from the cavity 23 through one or more connection ports 28 provided in a chill vent 27 (Chill-Vent) provided at the boundary between the fixed mold 21 and the movable mold 22. Is directly sucked.
  • the sucked gas may include, in addition to air, molten metal or vapor of a mold release agent.
  • the control device 3 opens and closes various valves provided in the vacuum suction system of the die casting machine 100 including the vacuum suction system 2 at an appropriate timing, thereby suctioning the inside of the sleeve 11 and the cavity 23 by each system.
  • the state can be controlled.
  • the vacuum suction system 2 includes a vacuum pump 37, a vacuum tank 36, a merging / distribution unit 34, and a suction path 51 individually corresponding to the through portions 14 and 15 of the sleeve 11.
  • Each suction path 51 includes a vacuum filter 31 for evacuation, a pressure gauge for detecting the pressure in the suction path 51, a compound meter, and a pressure gauge from upstream to downstream of the flow of the gas sucked from the sleeve 11.
  • a pressure detecting unit 32 such as a sensor and a selection valve 33 for selectively communicating the penetrating portions 14 and 15 with the vacuum tank 36 are provided.
  • each of the penetrating portions 14 and 15 can be communicated with the vacuum tank 36 in a timely manner. Further, one or both of the penetrating portions 14 and 15 can be communicated with the vacuum tank 36 according to the filling rate of the molten metal into the sleeve 11 and the like.
  • the pressure inside the vacuum tank 36 is reduced by evacuation performed by operating the vacuum pump 37.
  • the gas in the sleeve 11 can be sucked into the vacuum tank 36 in a timely manner by the pressure difference from the vacuum tank 36 while the vacuum pump 37 is continuously operated.
  • the penetrating portions 14 and 15 are selectively communicated with the vacuum tank 36 according to the position of the plunger 12 in the reciprocating direction D1, the state of suction from the penetrating portions 14 and 15, and the like.
  • the selection valves 33 corresponding to the penetrating portions 14 and 15 are controlled so as to be opened and closed according to the pressure in the suction path 51 detected by the pressure detecting portion 32, the position of the plunger 12 in the reciprocating direction D1, and the like. be able to.
  • the pressure difference between the inside of the vacuum tank 36 and the inside of the sleeve 11 is passed through the through portion of the through portions 14 and 15 in which the corresponding selection valve 33 is open.
  • the gas inside the sleeve 11 flows into the suction path 51.
  • the gas flowing into the suction path 51 passes through the vacuum filter 31, the pressure detection unit 32, and the selection valve 33, and joins with the flow from the other suction path 51 in the junction / distribution unit 34, and further, the vacuum / air blow switching valve 35 and the piping. Through 55, it flows into the vacuum tank 36.
  • the pressure (degree of vacuum) of the suction path 51 detected by the pressure detection unit 32 it is preferable to monitor the pressure (degree of vacuum) of the suction path 51 detected by the pressure detection unit 32 to confirm that the evacuation is performed normally. For example, if a part of the penetrating portion or the suction path 51 is closed due to the molten metal scum, or if the opening is narrowed by the accumulation of the molten metal, or the vacuum filter 31 is clogged, even if it is not closed. , The pressure detected by the pressure detector 32 deviates from the normal range to the higher side. In this case, cleaning of the penetrating portion or the suction path 51 where the abnormality has occurred, cleaning or replacement of the vacuum filter 31 and the like may be performed.
  • a pressurized air supply system 9 for performing air blow includes a compressed air source 39 which is a supply source of pressurized air, and a pressurized tank 38 which stores pressure therein by being supplied with air by the compressed air source 39. It has.
  • the vacuum suction system 2 and the pressurized air supply system 9 of this embodiment are configured to include a vacuum / air blow switching valve 35 installed downstream (downstream at the time of vacuum suction) from the merging / distribution unit 34.
  • the vacuum / air blow switching valve 35 switches between the vacuum suction and the air blow by switching the connection destination of the merging / distribution section 34 to the vacuum pipe 55 and the air blow pipe 56.
  • the suction path 51 upstream of the merging / distributing section 34 (upstream at the time of vacuum suction) is common for vacuum evacuation and air blow. Therefore, the air blow and the evacuation can be continuously performed without interrupting the production of the cast product due to the replacement of the pipes to the through portions 14 and 15.
  • the pressure detection unit 32 can detect the pressure at the time of air blow in addition to the pressure at the time of evacuation. When a part of the selection valves 33 is closed, the flow rate of the air in the penetrating portion and the suction path 51 corresponding to the opened selection valve 33 increases, so that the cleaning effect is enhanced.
  • the air blow through the penetrating portions 14 and 15 may be performed in a state in which the molten metal 18 is not stored in the sleeve 11 so as not to be shortly before the hot water is supplied so that the molten metal 18 will not be disturbed by the air blow or hinder the hot water supply. it can.
  • step S104 The process of vacuuming the sleeve by the circuit A (control circuit) from step S104 to step S114 shown in FIG. 3 shows the basic operation of the selection valve 33 corresponding to the through portions 14 and 15, respectively.
  • the penetrating portions 14 and 15 are sequentially closed by the tip 20 of the plunger 12 advanced.
  • the tip 20 sequentially passes through the penetrating portions 14 and 15.
  • the penetrating portion is closed by the second large-diameter portion 202 of the tip 20, the penetrating portion is in a state of not communicating with the front space 75 or the inside of the suction concave portion 120. It cannot be used for a sleeve vacuum sucked from the inside of the recess 120.
  • step S101 shown in FIG. 3 it is confirmed that the inside of the vacuum tank 36 has reached a sufficient degree of vacuum, and a preparation completion signal is output.
  • step S102 after pouring, after the plunger 12 moves forward and exceeds the position at which the pouring port 13 is closed, the operation of pulling the sleeve 11 to a vacuum by the vacuum suction system 2 is started.
  • a predetermined position of the plunger 12 in the advance / retreat direction D1 can be determined as a vacuum start position at which vacuum suction is started.
  • the arrival of the plunger 12 at the set vacuum start position is detected by detecting the stroke of a hydraulic cylinder that drives the plunger 12 with a non-contact sensor or the like.
  • the arrival of the plunger 12 at each set position in the following steps is detected in the same manner.
  • step S103 the vacuum / air blow switching valve 35 is switched to vacuum suction.
  • step S104 the plunger 12 reaches the set position (FIG. 2 / rear penetrating part closing position) for closing the penetrating part 14 (suction port).
  • step S105 the selection valve 33 corresponding to the through portion 14 is closed.
  • step S106 the plunger 12 reaches a set position (FIG. 2 / front penetrating part closing position) for closing the penetrating part 15.
  • the degree of vacuum of the suction path 51 corresponding to the penetrating part 15 is measured using the pressure detecting part 32.
  • step S107 the selection valve 33 corresponding to the through portion 15 is closed.
  • step S108 the vacuum / air blow switching valve 35 is turned off (neutral position).
  • step S109 the selection valves 33 of the respective penetrating portions 14 and 15 are all opened.
  • step S110 the vacuum / air blow switching valve 35 is switched to air blow.
  • step S111 the air is blown into the sleeve 11 through the penetrating portions 14 and 15 by using the pressurized tank 38 by the pressurized air supply system 9 having a part of piping common to the vacuum suction system 2.
  • the selection valves 33 of the through portions 14 and 15 may be all open, or the selection valves 33 may be opened one by one in order.
  • the vacuum / air blow switching valve 35 is turned off (neutral position) (S114).
  • step S112 while the air blow is being performed, the pressure in the suction passages 51 of the penetrating sections 14 and 15 is measured by the pressure detecting section 32, and based on the pressure, whether or not the pipe or the vacuum filter 31 is clogged. Is determined. If clogging occurs, an alarm is issued by a lamp, a buzzer, or the like (step S113).
  • the selection valve 33 is preferably closed while the corresponding penetration is closed by the second large diameter portion 202 of the tip 20.
  • the second large diameter portion 202 passes through the penetrating portion and the penetrating portion communicates with the space 88 around the plunger rod 19 in FIG. May flow from the space 88 into the vacuum tank 36 via the suction portion 51 via the through portion. Since this is not intended, for example, in the step shown in FIG. 6C, it is preferable to close the selection valve 33 corresponding to the penetrating portion 14 closed by the tip 20.
  • the operation of the selection valve 33 described above is only an example. It is preferable that the selection valve 33 be appropriately closed based on not only the disabled state due to the closing of the through portions 14 and 15 but also the disabled state of the suction path 51 and the like caused by the molten metal scum as described above. Alternatively, it is possible to open and close the selection valves 33 respectively corresponding to the penetrating portions 14 and 15 based on manufacturing conditions according to a mold and a product.
  • the molten metal 18 in the sucked sleeve 11 is stored and suppressing the runaway of the molten metal 18, the molten metal 18 is caused by molten metal scum.
  • the inside of the sleeve 11 is stably sucked while avoiding clogging of the penetrating portions 14 and 15 and the suction path 51 and lowering of suction efficiency. Since the entrapment of gas into the molten metal 18 is suppressed by suppressing the runaway of the molten metal 18, the occurrence of entrapment nests is prevented.
  • both the front space 75 and the inside of the suction recess 120 of the plunger tip 20 are formed by using the through portions 14 and 15. Is evacuated.
  • the plunger tip 20 has a larger diameter than the plunger rod 19, and pushes out the molten metal 18 stored in the sleeve 11 toward the front when the plunger 12 advances.
  • the plunger rod 19 is fastened to the plunger tip 20 by a tip joint 20D.
  • the plunger tip 20 has a first large-diameter portion 201 located on the front side in the advance / retreat direction D ⁇ b> 1 and a second large-diameter portion located on the rear side in the advance / retreat direction D ⁇ b> 1 and partitions the suction concave portion 120 between the first large-diameter portion 201.
  • the diameter of the plunger tip 20 at the position of the suction recess 120 is smaller than the diameters of the first large diameter portion 201 and the second large diameter portion 202. Therefore, a section between the first large diameter portion 201 and the second large diameter portion 202 in the axial direction (D1) of the plunger tip 20 is referred to as a small diameter portion 203.
  • An outer peripheral portion 203A of the small-diameter portion 203 is formed with a two-sided width 203B (FIG. 4B) that engages with a fastening tool.
  • the suction concave portion 120 is retracted inward in the radial direction D2 with respect to the inner peripheral portion 11A of the sleeve 11, and is continuous in the circumferential direction D3.
  • the suction recess 120 is continuous over the entire circumference of the plunger tip 20. Therefore, a gap having an annular cross section is formed between the inner peripheral portion 11A of the sleeve 11 and the outer peripheral portion 203A of the small-diameter portion 203 corresponding to the suction concave portion 120.
  • the pressure difference (P1-P2) is equal to the atmospheric pressure P0 and the pressure in the front space 75. This is because the difference from P2 (P0 ⁇ P2) is sufficiently small, so that outside air is prevented from flowing into the front space 75 through the inside of the suction recess 120.
  • the suction inside the front space 75 and the suction recess 120 can be performed by one vacuum suction system 2. Both the gas sucked from the front space 75 and the gas sucked from inside the suction recess 120 are sucked by the same vacuum pump 37 via the same vacuum tank 36. Therefore, as compared with a case where a vacuum suction system is separately provided in the front space 75 and the suction concave portion 120, the device cost of the vacuum pump 37, the vacuum tank 36, and the like can be reduced. Also, since the number of vacuum suction systems is small, the number of inspection points for gas leakage (leakage) is small, so that the inspection work efficiency is good.
  • the inside of the suction recess 120 is suctioned, and the outer periphery 20C of the plunger tip 20 (FIG. 4B) and the inner periphery 11A of the sleeve 11 are combined. It is effective to seal the gap between them with an appropriate sealing member, a tip lubricant or the like.
  • the injection device 1 of the present embodiment can suction the inside of the sleeve 11 at the first portion C1 and the second portion C2 of the sleeve 11 in the advance / retreat direction D1 through the penetrating portions 14 and 15 respectively penetrating the sleeve 11.
  • the main feature is that the opening area of the through portion 15 at the first location C1 is larger than the opening area of the through portion 14 at the second location C2.
  • the openings related to the suction efficiency of the front space 75 are provided by arranging the penetrating portions in many places of the sleeve 11 at intervals in the advance / retreat direction D1. It may be difficult to secure a sufficient area. Even in this case, by providing a through portion having a large opening area at any one place, the opening area can be sufficiently increased for vacuum suction in the sleeve 11 and thus vacuum suction of the cavity 23 communicating with the inside of the sleeve 11. Can be secured.
  • the through portion 15 at the first location C1 is referred to as a front through portion 15, and the through portion 14 at the second location C2 is referred to as a rear through portion 14.
  • the front penetration portion 15 is used for suctioning a space 75 in front of the front end 20 ⁇ / b> A of the chip 20.
  • the rear through portion 14 is used for suction inside the suction recess 120.
  • FIG. 5 is a plan view showing an example of the form of the front penetration part 15 and the rear penetration part 14. As shown by a solid line or a two-dot chain line in FIG. 5, the front penetrating portion 15 may have an appropriate form as long as the opening area is larger than that of the rear penetrating portion 14.
  • the front penetration part 15 shown by a solid line in FIG. 5 is a hole having a circular opening. The same applies to the rear penetration portion 14 shown in FIG. Since the opening diameter of the front penetrating part 15 is larger than the opening diameter of the rear penetrating part 14, the opening area A1 of the front penetrating part 15 is larger than the opening area A2 of the rear penetrating part 14. .
  • the front penetrating portion 15 shown by a two-dot chain line in FIG. 5 is formed in an oval shape longer in the circumferential direction D3 of the sleeve 11 than the rear penetrating portion 14 shown in FIG.
  • the opening area A1 of the front penetration part 15 is also larger than the opening area A2 of the rear penetration part 14.
  • the front penetrating portion 15 may have an oval shape that is longer than the rear penetrating portion 14 in the axial direction of the sleeve 11 (the reciprocating direction D1).
  • the front penetration part 15 and the rear penetration part 14 are not limited to the form of a circle or an ellipse, but may be an appropriate form such as an ellipse or a rectangle in consideration of connection with the suction pipe.
  • Each of the front penetrating part 15 and the rear penetrating part 14 does not necessarily need to be constituted by only one hole.
  • the front penetration part 15 and the rear penetration part 14 can each be comprised from one or more arbitrary numbers of holes.
  • the front penetrating portion 15 can be configured by two or more circular holes having the same diameter as the hole of the rear penetrating portion 14.
  • a set of two or more holes corresponds to the front penetrating portion 15, and the front penetrating portion 15 can have an opening area twice or more the opening area of the rear penetrating portion 14. If the total opening area of the one or more holes constituting the front penetration part 15 is larger than the total opening area of the one or more holes constituting the rear penetration part 14, the front penetration part 15 and the rear penetration part Each can be provided with an appropriate number of holes.
  • the plurality of holes constituting the front through portion 15 can be appropriately arranged regardless of whether they are regular or irregular.
  • a plurality of holes constituting the front through portion 15 may be arranged in the circumferential direction D3 of the sleeve 11.
  • a plurality of holes may be arranged over a predetermined angle range on both sides of the 12 o'clock position, which is the upper end of the sleeve 11, so that each hole is located above the surface of the molten metal 18.
  • the front space 75 is sucked through the front penetrating portion 15, and when the inside of the suction concave portion 120 is sucked through the rear penetrating portion 14, the suction is performed through the front penetrating portion 15 having a larger opening area. It is possible to efficiently reduce the pressure of the front space 75 to a lower pressure than the inside of the suction recess 120. Then, suction of the outside air into the front space 75 is suppressed by suction inside the suction recess 120 through the rear penetration portion 14, thereby preventing the molten metal 18 from rampaging, and thereby the penetration portions 14, 15 and the suction path caused by the molten metal scum.
  • the pressure in the front space 75 can be reduced to a desired degree of vacuum while avoiding the blockage of 51 and a decrease in suction efficiency, thereby suppressing the occurrence of a nest.
  • both the front space 75 and the inside of the suction concave portion 120 may be vacuum-suctioned while the advance of the plunger 12 is temporarily stopped.
  • the vacuum suction inside the suction recess 120 is performed prior to the start of the vacuum suction of the front space 75. It is preferable to start.
  • both the front space 75 and the inside of the suction recess 120 are partitioned by the tip 20 into the sleeve 11 so as not to communicate with the pouring port 13.
  • the front space 75 communicates with the front penetration portion 15, and the inside of the suction recess 120 communicates with the rear penetration portion 14. Therefore, as shown by the solid arrow in FIG. 6A, the vacuum can be sucked from the front space 75 by the vacuum suction system 2 (FIG. 2) through the front penetration portion 15, and the broken line arrow in FIG.
  • suction can be performed from the inside of the suction recess 120 by the vacuum suction system 2 through the rear penetration portion 14.
  • the gap 89 between the first large-diameter portion 201 and the sleeve 11 (FIG. 6C). While sucking the front space 75 from the front through portion 15, the inside of the suction concave portion 120 can also be sucked from the rear through portion 14 through the gap 90. Even after the suction from the front space 75 is completed, the suction from the inside of the suction recess 120 can suppress the inflow of outside air into the front space 75 continuously.
  • suction penetration portions respectively corresponding to the front space 75 and the inside of the suction concave portion 120 are provided at two positions of the first position C1 and the second position C2 of the sleeve 11 in the advance / retreat direction D1. I have. Therefore, at least until immediately before the front penetrating part 15 is closed, as shown by a broken arrow in FIG. 6B, the suction concave part 120 is directly communicated with the inside of the suction concave part 120 through the rear penetrating part 14. What is necessary is to be able to suck continuously from inside.
  • the interruption of the vacuum suction is permissible as long as the time is short enough not to affect the occurrence of a entanglement due to the runaway of the molten metal 18 or the blockage of the penetrating portion or the like by the molten metal scum.
  • at least one of the front space 75 and the inside of the suction recess 120 is partly provided from the start to the end of the sleeve vacuum suction. May be interrupted, or the start and end timings of the sleeve vacuum suction between the front space 75 and the inside of the suction recess 120 may be different.
  • the first large-diameter portion is omitted.
  • the front penetrating part 15 is closed by 201 and the rear penetrating part 14 is closed by the second large diameter part 202, there is no penetrating part communicating with the inside of the concave part 120 for suction. May be interrupted. At this time, even if the molten metal 18 is unraveled, since there is no open through portion other than the penetrating portions 14 and 15, there is no fear that the penetrating portion is closed at least by scattering of the molten metal 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

L'air extérieur ne peut pas entrer dans un manchon aspiré, les problèmes avec le métal fondu sont supprimés, et une aspiration stable à l'intérieur du manchon est réalisée. Le dispositif d'injection (1) d'une machine à couler sous pression (100) est conçu pour permettre l'aspiration d'un évidement d'aspiration (120), qui est divisé par une pointe (20) d'un plongeur (12), et un espace (75) devant l'extrémité avant de la pointe (20). L'intérieur d'un manchon (11) peut être aspiré à travers des parties pénétrantes (14, 15) qui pénètrent chacune dans le manchon (11) de l'intérieur vers l'extérieur à un premier emplacement prescrit (C1) du manchon (11) dans la direction d'avance/recul (D1) du plongeur (12) et à un second emplacement (C2) décalé vers l'arrière par rapport au premier emplacement (C1). La zone d'ouverture de la partie pénétrante (15) au niveau du premier emplacement (C1) est supérieure à la zone d'ouverture de la partie pénétrante (14) au niveau du second emplacement (C2).
PCT/JP2019/021911 2018-07-03 2019-06-03 Dispositif d'injection de machine à couler sous pression et procédé de coulée Ceased WO2020008770A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201980026253.7A CN111989176A (zh) 2018-07-03 2019-06-03 压铸机的注射装置及铸造方法
KR1020207029532A KR102677366B1 (ko) 2018-07-03 2019-06-03 다이캐스트 머신의 사출 장치 및 주조 방법

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2018126459 2018-07-03
JP2018-126459 2018-07-03
JP2018-237979 2018-12-20
JP2018237979A JP7127527B2 (ja) 2018-07-03 2018-12-20 ダイカストマシンの射出装置および鋳造方法

Publications (1)

Publication Number Publication Date
WO2020008770A1 true WO2020008770A1 (fr) 2020-01-09

Family

ID=69060640

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/021911 Ceased WO2020008770A1 (fr) 2018-07-03 2019-06-03 Dispositif d'injection de machine à couler sous pression et procédé de coulée

Country Status (1)

Country Link
WO (1) WO2020008770A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57102452U (fr) * 1980-12-15 1982-06-24
JPH02144252U (fr) * 1989-05-09 1990-12-06
JPH0623509A (ja) * 1992-04-27 1994-02-01 Outboard Marine Corp ダイカスト装置用真空弁手段の設計方法およびダイカスト装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57102452U (fr) * 1980-12-15 1982-06-24
JPH02144252U (fr) * 1989-05-09 1990-12-06
JPH0623509A (ja) * 1992-04-27 1994-02-01 Outboard Marine Corp ダイカスト装置用真空弁手段の設計方法およびダイカスト装置

Similar Documents

Publication Publication Date Title
KR102354667B1 (ko) 주조 장치용의 사출 장치 및 주조 방법
JP2020006436A (ja) ダイカストマシンの射出装置および鋳造方法
JP5709873B2 (ja) 真空ダイカスト装置
EP3423251B1 (fr) Insert poreux pour buse d'un système de moulage par injection
JP2019202350A (ja) ダイカストマシン
KR20040028554A (ko) 다이캐스트 제품을 제조하기 위한 장치 및 방법
WO2020008770A1 (fr) Dispositif d'injection de machine à couler sous pression et procédé de coulée
JP3713176B2 (ja) 加圧凝固鋳造方法及び装置
JP2008246503A (ja) 鋳造方法及びダイカストマシン
JP7388037B2 (ja) ダイカストマシンの制御装置、制御パラメータの設定に用いられる指標値を取得する装置および方法
JP4566430B2 (ja) 成形用金型
CN111971135B (zh) 压铸机的注射装置、压铸机、压铸机的真空用配管的构造以及铸造方法
JP7524695B2 (ja) ダイカストマシンの射出装置および鋳造方法
JP2020055033A (ja) ダイカストマシンの真空用配管の構造
JP4085537B2 (ja) ダイカスト鋳造機及びダイカスト鋳造方法
JP2006026698A (ja) ダイカスト金型のキャビティ内圧力測定装置
IT201600125927A1 (it) Gruppo di iniezione per impianti di pressofusione
WO2019225272A1 (fr) Dispositif d'injection pour machine de coulée sous pression, machine de coulée sous pression, structure de tuyau sous vide pour machine de coulée sous pression et procédé de coulée
JPH0238067B2 (ja) Shinkudaikasutochuzohohooyobisonosochi
JP6068930B2 (ja) ダイカスト用金型装置
JP7552320B2 (ja) 鋳造装置
JP2011088319A (ja) 成形機及びスプルの離型方法
JPH0231227Y2 (fr)
JPH09323144A (ja) 横型締・縦射出ダイカストマシン
JP5254135B2 (ja) ダイカストマシンのガス抜き装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19831562

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19831562

Country of ref document: EP

Kind code of ref document: A1