JPH1148324A - Preform unloader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve unloading, cooling and receiving, delivering of a preform by simplifying a structure and reducing number of components. SOLUTION: A product receiving unit for receiving a preform 10 from a mold has a plurality of product receiving sleeves 32 and a casing 31 having a plurality of sleeve mounting holes 31f aligned in one row. A cooling water flowing space 31a formed in a film state between an inner periphery of the hole 311f and an outer periphery of the sleeve 32 and formed to communicate the holes 31f with each other is provided in the casing 31. A preform receiving plug 34 having an air hole 34a for introducing the air of predetermined pressure for grasping or unloading the preform from an air passage 24a formed in a support frame 34 to a bottom of each hole 31f is installed at the bottom of the each hole 31f.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing a cylindrical preform molded in an injection molding machine from a mold.
The present invention relates to a preform take-out machine that transfers a preform taken out to a subsequent conveyor while cooling it.

[0002]

2. Description of the Related Art In the manufacturing process of PET bottles and the like,
It is generally known that, first, a large number of preforms are simultaneously injection-molded by an injection molding machine, and thereafter, the body of the preform is heated to a predetermined temperature and blow-molded. In order to move from the injection molding process to the subsequent blow molding process, it is necessary to temporarily remove the preform from the mold of the injection molding machine,
The temperature of the preform immediately after the injection molding is a high temperature of several hundred degrees, and if the preform is taken out of the mold at this temperature and passed to a subsequent process, the preform is deformed.
Therefore, when the preform is taken out of the mold, the preform is once cooled to a temperature at which the preform is not deformed (the glass transition temperature of PET), solidified, and then taken out of the mold.

However, since the preform is formed to have a relatively large thickness, it takes a considerable time to cool the glass from a temperature of several hundred degrees to a glass transition temperature, which causes a reduction in the overall production capacity. . When removing the preform from the mold, as long as the preform can be supported by the mold, the mold does not need to be cooled to the glass transition temperature at the time of removal, and the outer surface of the preform is removed. The mold may be cooled to such a degree that it does not deform. Generally, this degree is cooled at the ambient temperature around the mold. However, when the preform is transferred to a subsequent processing step, the preform is deformed unless the preform is cooled to the glass transition temperature.

For this reason, conventionally, the state in which the preform is supported by the mold when the outer surface is cooled to such an extent that the preform does not deform is maintained without waiting for the preform to be cooled to the glass transition temperature in the mold. There has been proposed a preform removal machine in which a preform is removed from a mold as it is, and the preform is transferred to a subsequent processing step while cooling the preform to a temperature equal to or lower than a glass transition temperature by a rapid cooling mechanism, thereby increasing production capacity.

Japanese Unexamined Patent Publication No. Hei 8-252845 discloses a technique (first conventional technique) relating to such a preform removal machine. In this technique, a plurality of product receiving sleeves are arranged on a frame in accordance with the arrangement of the preforms on the mold, and the preform is supported by the mold via these sleeves. While being taken out of the mold, the preform is conveyed to the next step while cooling the preform by a cooling mechanism provided in the sleeve.

First, when removing the preform from the mold, the preform is housed in the sleeve, and the preform presses the plug provided at the bottom of the mounting hole of the sleeve. Then, the plug and the sleeve mounting hole constitute an on-off valve, and the valve opens when pressed. Then, the vacuum pipe provided inside the frame and the bottom of the preform are connected through an air passage provided in the plug, a suction force acts on the preform, and the preform is sucked by the plug and taken out of the mold. I have.

[0007] The sleeve is formed by fitting both ends of two casings in a watertight manner.
Cooling water is passed through the gap between the two casings from a cooling water passage provided in the frame, so that the preform held in the sleeve is cooled. Further, the frame provided with these sleeves is attached to a transport device, and is transported to the subsequent moving belt side while the preform is taken out from the mold and cooled. Then, a transfer assembly including a gripper grasps the preform held in the sleeve and transfers the preform to the moving belt.

[0008] Further, in the technique relating to a preform removal machine disclosed in Japanese Patent Publication No. 0509803 (second related art), a plurality of cooling water pipes and vacuum pipes similar to the first related art are provided on a frame. A sleeve is arranged,
These sleeves have a double structure, and a spiral cooling passage is provided in the gap. By passing cooling water from a cooling water pipe through the spiral cooling passage, the preform held in the sleeve is cooled.

In this technique, the delivery of the preform to the next step is performed by pulling out the preform fitted in the sleeve by the actuator provided in each sleeve.

[0010]

However, in the above-mentioned conventional preform removal machine, since the cooling mechanism is provided independently for each sleeve, the number of parts becomes large and the structure becomes complicated. There is a problem that the cost and the assembly cost increase. Increasing the cooling speed of the preform is an important matter in increasing the production capacity of the entire production line, but when a cooling mechanism is provided independently for each sleeve as in a conventional preform unloader. However, the passage area of the cooling water in the cooling mechanism is limited, and it is difficult to flow a large amount of cooling water. In particular, when a cooling water flow is provided by providing a spiral cooling passage around the sleeve, in addition to the fact that the flow rate of the cooling water cannot be increased,
Since the contact area between the sleeve and the cooling passage is small, the cooling efficiency is low. For this reason, it takes time to cool the preform, which may be an obstacle in increasing the production capacity of the entire production line.

Further, in order to increase the production capacity of the entire production line, the preform cooling speed is increased, and at the same time, the accuracy and speed of taking out the preform from the mold, and the delivery to the subsequent transfer conveyor. Accuracy and speed, and further improvements have been desired for these. The present invention has been made in view of the above problems, and has as its object to provide a preform removal machine having a simple structure, a small number of parts, and excellent preform removal, cooling, and delivery capabilities. I do.

[0012]

In order to achieve the above object, a preform removing machine according to the present invention is a cylindrical preform which is formed by arranging a plurality of preforms in a line at the same time by an injection molding machine. Is removed from the mold, transferred to a conveyor while cooling,
A product receiving unit that receives the preforms arranged in a row at the same time from the mold, and a support frame that supports the product receiving unit, wherein the product receiving unit is provided with the preform on the mold side. A plurality of product receiving sleeves arranged in the axial direction, and a casing having a plurality of sleeve mounting holes arranged in a row, the sleeves being respectively inserted in the sleeve mounting holes. The casing is formed in a film shape between the inner peripheral surface of the sleeve mounting hole and the outer peripheral surface of the sleeve, and is formed so as to communicate between the sleeve mounting holes, and is watertight at both ends of the sleeve. A closed cooling water circulation space, a cooling water inlet for introducing cooling water into the cooling water circulation space, and a cooling water outlet for discharging cooling water from the cooling water circulation space; An air passage which is disposed on an end side, communicates with an air supply / discharge passage formed in the support frame, and introduces air at a required pressure for gripping or removing the preform through the air supply / discharge passage; A preform receiving plug having an air hole for introducing the air for gripping or removing the preform from the air passage to the bottom of each sleeve mounting hole is provided at each of the bottoms of the sleeve mounting holes. It is characterized by.

According to a second aspect of the present invention, there is provided a preform removing machine according to the first aspect, wherein the preforms are simultaneously molded in a plurality of rows by the injection molding machine. A plurality of the product receiving units are provided for each of the preform rows, and each of the product receiving units is connected to the air passage to the air supply / discharge passage in the support frame. The cooling water outlet of one product receiving unit and the cooling water inlet of the other product receiving unit are connected between the adjacent product receiving units of the respective product receiving units. The cooling water flow pipe to be connected is interposed.

According to a third aspect of the present invention, there is provided the preform removal machine according to the first or second aspect, wherein the product receiving unit is continuously provided on the support frame, where the product receiving unit is already provided. A unit addition attachment portion is provided, and the product reception unit for addition is connected to the product reception unit addition attachment portion such that the air passage is connected to the air supply / discharge passage in the support frame. Between the cooling water inlet or the cooling water outlet of the added product receiving unit and the cooling water outlet or the cooling water inlet of the existing product receiving unit adjacent to the added product receiving unit. It is characterized in that the product receiving unit can be added by interposing a water distribution pipe.

According to a fourth aspect of the present invention, there is provided the preform removing machine according to the first to third aspects, wherein the casing is configured to be dividable and the sleeve is inserted into the sleeve. An additional casing having a hole is provided, and the sleeve provided on the casing can be added by interposing the additional casing at a divided portion of the casing.

According to a fifth aspect of the present invention, there is provided the preform removing machine according to the first to fourth aspects, wherein the preform receiving plug is provided at the bottom of the sleeve mounting hole and in the sleeve. An opening / closing valve is provided so as to be movable in the direction of movement of the preform and opens and closes an air hole of the plug in accordance with the movement of the plug in the direction. A biasing member for biasing toward the inlet direction of the sleeve so as to oppose the opening direction, and the opening / closing valve is provided so that the plug can be biased by the biasing force of the biasing member without the preform entering the sleeve. When the preform enters the sleeve, the plug is pressed by the preform and moves toward the bottom of the sleeve. It is characterized in that open with.

According to a sixth aspect of the present invention, there is provided the preform removing machine according to the first to fifth aspects, wherein the injection molding machine is configured to form the preform in a horizontal direction. The support frame has a reciprocating actuator for horizontally moving the product receiving unit when receiving the product, and the product receiving unit is horizontally disposed adjacent to the injection molding machine after receiving the product. A slide actuator that slides onto the preform tray and the product receiving unit that takes out the preform in a horizontal direction is rotated around a horizontal axis,
A rotary actuator for rotating the preform in a vertical direction along the preform support direction of the preform tray is provided.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 to 5 show a preform removing machine as a first embodiment of the present invention. First, the configuration of the entire system will be described along the flow from the removal of a preform from an injection molding machine by a preform removal machine to the transfer to a transport conveyor. FIG. 1 shows an injection molding machine, a preform removal machine, and a transport conveyor. FIG. 2 is a side view as seen from the AA cross section of FIG. 1.

First, the configuration of the injection molding machine will be described. As shown in FIG. 1 or FIG. 2, the injection molding machine 1 has a fixed mold plate 2 having a fixed mold 4 and a movable mold 5. The movable mold plate 3 is clamped in the direction of the fixed mold plate 2 via the tie bar 21, and the injection unit 6 provided on the fixed mold plate 2 is connected to the fixed mold 4. The preform 10 is formed by injecting a molten resin into a mold formed by the movable mold 5 and the movable mold 5. Further, a moving cylinder 18 for moving the movable mold platen 3 for opening and closing the mold other than the mold clamping is provided.

Then, the preform removing machine 7 converts the preform 10 molded by the injection molding machine 1 into
The preform take-out cooling device takes out the preform 10 and cools it, taking out the preform 10 and cooling it. 12 and a preform removal moving mechanism 14 for moving the preform removal cooling device 12 toward the movable mold 5 when the preform 10 is removed.
And a horizontal transport mechanism 15 for horizontally moving the preform removal / cooling device 12 from between the dies 4 and 5 to above the transport conveyor 8.
And a rotation drive mechanism 13 for rotating the preform take-out cooling device 12 by 90 degrees when the preform 10 is transferred.

The conveyor 8 has a tray lift 16 at the transfer position of the preform 10. The preform 10 taken out by the preform take-out machine 7 and cooled is placed on the preform tray 9 on the tray lift 16. And transported to a subsequent process by the transport conveyor 8. The configuration of the entire system is as described above. Next, the preform removal machine of the present embodiment will be described in detail.

First, the preform take-out cooling device 12 for taking out the preform 10 from the mold and cooling it will be described. As shown in FIG. 3, the preform take-out cooling device 12 includes a plurality of product receiving units 23 supporting the support frame 2.
4 and is supported via a rotation shaft 25 provided in the rotation drive mechanism 13 (shown in FIG. 2).

Here, since the preforms 10 are simultaneously molded in a plurality of rows on the mold 5 by the injection molding machine 1, the product receiving units 23 are also arranged in each row of the preforms 10, and Support frames 24 by the number of rows
It is arranged above. In addition, the support frame 24 is provided with an additional mounting portion for the product receiving unit 23 adjacent to the existing portion of the product receiving unit 23, so that the number of preforms simultaneously molded by the injection molding machine 1 is increased. , The product receiving unit 23 can be added in accordance with it.

One side of the product receiving unit 23 (FIG. 3)
In FIG. 3, a cooling water inlet 31d is provided at one end (the lower end in FIG. 3), and the other end (the upper end in FIG. 3) of the other side (the left side in FIG. 3). Is provided with a cooling water outlet 31e. The cooling water inlet 31d and the cooling water outlet 31e of the adjacent product receiving unit 23 are connected by a connecting flexible pipe (cooling water distribution pipe) 27b. A water supply flexible pipe (cooling water flow pipe) 27a and a drainage flexible pipe (cooling water flow pipe) 27c are connected to the outlet 31e, respectively.

The support frame 24 has an air pipe 28
Are connected, and the air supply / discharge passage 2 inside the support frame 24 is
4a (see FIG. 4) to the product receiving unit 23. The air pipe 28 is a flexible pipe for supplying air at a negative pressure for gripping the preform or at a positive pressure for removing the preform. The switching between the negative pressure and the positive pressure is performed by a switching valve 29. Has become.

Here, the configuration of the product receiving unit 23 will be described in detail. 4 and 5 are sectional views taken along the line BB of FIG. 3 showing the internal structure of the product receiving unit 23, and FIG. 5 is a sectional view taken along the line CC of FIG. As shown in FIG. 4 or 5, the product receiving unit 23 includes a product receiving sleeve 32 that houses the preform 10, a casing 31 that covers the sleeve 32, and a preform 10 that is provided at the bottom of the mounting hole of the sleeve 32. It mainly comprises a receiving plug 34.

The casing 31 comprises a base 31A for supporting the sleeve 32 and an outer cover 31B for covering the sleeve 32. A plurality of sleeve mounting holes 31f are formed in the base end 31A in accordance with the vertical arrangement of the preform 10 on the movable mold 5, and the sleeve 3 is correspondingly provided.
1B is provided with an insertion port 31g for inserting the sleeve 32 into the casing 31.

The rear end 32b of the sleeve 32 inserted into the casing 31 from the insertion opening 31g is fitted in a watertight manner with the sleeve mounting hole 31f, while the flange 32a provided at the tip of the sleeve 32 is The insertion plate 31g is pressed by the holding plate 33 against the insertion opening 31g, and the insertion opening 31g is hermetically sealed. The outer jacket 31B is formed such that the inner peripheral surface thereof communicates with the sleeve mounting holes 31f while maintaining a constant gap from the outer peripheral surfaces of the series of sleeves 32.

Therefore, the casing 31 and the sleeve 3
A cooling water flow space 31a, which is closed in a water-tight manner, is formed between the cooling water discharge space 31a and the cooling water discharge space 31a. By draining, the preform 10 housed in the sleeve 32 can be cooled.

An air passage 31b is formed inside the base 31A of the casing 31 and communicates with an air supply / discharge passage 24a inside the support frame 24. An introduction hole 31c is formed between the air passage 31b and each sleeve mounting hole 31f. In addition, the support frame 2
A hole for the air supply / discharge passage 24a for adding the product receiving unit 23 is also formed in the additional mounting portion 4 as well, but is normally closed by a blind plate or the like (not shown).

The plug 34 is provided in each of the sleeve mounting holes 31f, and receives the preform 10 in the receiving portion 3.
The shape of 4A is formed according to the shape of the bottom surface 10a of the preform 10. Also, from the receiving portion 34A to the bottom 3
4B, the air hole 34a penetrates and the bottom 34
B faces the introduction hole 31c. Therefore, the air of the negative pressure for gripping the preform or the positive pressure for removing the preform introduced from the air pipe 28 is supplied from the air supply / discharge passage 24a inside the support frame 24 to the introduction hole 31c via the air passage 31b. Each sleeve mounting hole 31f extends to the air hole 3
4a acts on the bottom surface 10a of each preform 10. In addition, an air hole 34b that connects the side surfaces at right angles to the air hole 34a is also provided.

Next, the rotary drive mechanism 13 will be described. As shown in FIG. 2, the rotary drive mechanism 13 is composed of a rotary shaft 25 supporting the preform take-out cooling device 12 and a rotary actuator 26. . By rotating the rotation shaft 25 around the axis by the rotation actuator 26, the preform 10 taken out in the horizontal direction by the preform take-out cooling device 12 is rotated in the vertical direction.

The preform removal moving mechanism 14 supports the preform removal cooling device 12 via a rotation drive mechanism 13. The preform 10 is provided with an advance / retreat actuator (not shown).
As shown in FIG. 1, the preform removal cooling device 12 is moved toward the movable mold 5 by a distance F, and the preform 10 supported by the movable mold 5 is inserted into the sleeve 32. .

The horizontal transport mechanism 15 has the preform take-out moving mechanism 14 fixed to a timing belt 15b to be installed therein, and a servomotor (slide actuator).
By operating the timing belt 15b by operating the preform removal cooling device 12, the preform removal cooling device 12 is slid by a distance G from the space between the dies 4 and 5 to the preform tray 9 as shown in FIG. Has become.

Since the preform removal machine according to the first embodiment of the present invention is configured as described above, when the molding of the preform 10 by the injection molding machine 1 is completed, the movable cylinder 18 is driven to move the movable mold. The board 3 is moved by a distance E from the fixed mold board 2. Then, the servo motor 15a provided in the horizontal transport mechanism 15 is driven to drive the preform removal cooling device 12 fixed to the timing belt 15b.
Is moved from the side of the conveyor 8 by a distance G, and enters between the fixed mold 4 and the movable mold 5. When the entry is completed, the sleeve 32 provided in the product receiving unit 23 of the preform removal / cooling device 12 is located on the axis of the preform 10 on the movable mold 5.

When the entry of the preform removal / cooling device 12 by the horizontal transport mechanism 15 is completed, the preform removal / cooling device 12 is driven by driving an unillustrated advance / retreat actuator of the preform removal / movement mechanism 14 to move the movable mold 5. To the side by the distance F. Then, as shown by the dotted line in FIG. 1, the preform 10 on the movable mold 5 is inserted into the sleeve 32, and the preform 10 is protruded by an ejector or the like (not shown) provided in the movable mold 5. The preform 10 is accommodated in the sleeve 32.

When the preform 10 is accommodated in the sleeve 32, the switching valve 29 of the air pipe 28 is simultaneously switched to the preform gripping side. Then, the negative pressure air for gripping the preform introduced from the air pipe 28 flows from the air supply / discharge passage 24a inside the support frame 24 through the air passage 31b to the respective sleeve mounting holes 31f from the introduction hole 31c. A suction force acts on the bottom surface 10a of the preform 10 from the air hole 34a of the plug 34. And this bottom surface 10
The preform 10 is adsorbed on the receiving portion 34A of the plug 34 by the suction force acting on a.

The preform 10 is the receiving portion 3 of the plug 34
4A, the preform removal / cooling device 12 is retracted from the movable mold 5 by driving the unillustrated advance / retreat actuator of the preform removal / movement mechanism 14 again. It is completely removed from the movable mold 5. Then, the servo motor 15 a provided in the horizontal transfer mechanism 15 is driven to drive the preform removal cooling device 12 on standby on the tray lift 16 from between the fixed mold 4 and the movable mold 5. The slide is moved on the reform tray 9.

On the other hand, cooling water is introduced from a cooling water inlet 31d into a cooling water flow space 31a between the sleeve 32 holding the preform tray 10 and the casing 31. Since the cooling water circulation space 31a is formed in a film shape, a large amount of cooling water flows therethrough.
Since almost the entire outer peripheral surface of 2 is covered with the cooling water circulation space 31a, the preform 10 gripped by the sleeve 32 is rapidly cooled.

Further, since the cooling water inlets and outlets 31d and 31e between the adjacent product receiving units 31 are connected by the connecting flexible pipe 27b, the cooling water introduced from the water supply flexible pipe 27a is used for all the product receiving units 31. And the flexible pipe 27c for drainage
More drained. Therefore, all the preforms 10 held by the respective sleeves 32 are cooled consistently.

The cooling of the preform 10 is performed until the preform take-out cooling device 12 slides on the preform tray 9 by the horizontal transport mechanism 15. At this time, the preform 10 is cooled and its outer diameter is slightly reduced, so that a gap is formed between the preform 10 and the inner peripheral surface of the sleeve 32. However, the bottom surface 10a of the preform 10 Since the preform 10 is adsorbed, there is no possibility that the preform 10 will fall off during transportation.

When the preform take-out cooling device 12 is slid to the position indicated by the dashed line in FIG. 1 or 2, the rotation actuator 26 of the rotation drive mechanism 13 is operated to rotate the rotation shaft 25 by 90 degrees. Then sleeve 3
The preform 10 gripped in the horizontal direction 2 also rotates downward in the vertical direction. When the rotation is completed, the tray lift 16 on which the preform tray 9 is placed is raised, and the support 9a of the preform tray 9 is inserted into the preform 10.

When the insertion of the support portion 9a into the preform 10 is completed, the switching valve 29 of the air pipe 28 is switched to the preform removal side. Then, the receiving portion 34 of the plug 34
The suction force acting on the bottom surface 10a of the preform 10 from A is released, the preform 10 separates from the plug 34, falls naturally, and is delivered to the preform tray 9. At this time, since the outer diameter of the preform 10 is slightly reduced by cooling, the preform 10 can easily fall naturally simply by turning the preform 10 downward. The preform tray 9 that has received the preform 10 is transferred from the tray lift 16 to the transport conveyor 8 and transported to the next step.

As described above, according to the preform removal machine of the present embodiment, since the product receiving unit 23 is configured by inserting the plurality of sleeves 32 into the integrally formed casing 31, the number of parts is reduced. The structure is also simple, so that the cost can be reduced. The cooling water flow space formed between the sleeve 32 and the casing 31 is formed in a film shape so as to communicate with each other between the sleeve mounting holes 31f while keeping a constant gap from the outer peripheral surface of the sleeve 32. Therefore, a large amount of cooling water can be flowed, and a high cooling capacity can be obtained.

Further, a plurality of product receiving units 23 are provided on the support frame 24, and the cooling water outlets 31d and 31e between the adjacent product receiving units 31 are connected by the connecting flexible pipe 27b. By introducing cooling water from the flexible pipe 27a and draining it from the drainage flexible pipe 27c,
All preforms 1 gripped by each sleeve 32
0 can be cooled consistently.

Further, since the support frame 24 is provided with an additional mounting portion for the product receiving unit 23, the blind plate or the like of the additional mounting portion of the support frame 24 is removed, and the air passage 41b is formed in the air supply / discharge passage 24a. The product receiving unit 23 is installed so as to connect the preform 10, and the adjacent product receiving unit 23 is connected to the adjacent product receiving unit 23 by the connecting flexible pipe 27b, so that the product receiving unit 23 can be easily added. Can be increased.

The preform 10 is molded by the injection molding machine 1 in the horizontal direction. The preform removal cooling unit 12 for taking out the preform 10 includes a preform removal moving mechanism 14, a horizontal means 15, and a rotation drive mechanism. 1
3 is attached, so that the supporting portion 9a is oriented vertically.
The preform 10 can be accurately and quickly delivered to the preform tray 9 having

Next, a preform removal machine according to a second embodiment of the present invention will be described. The preform removal machine according to the second embodiment is different from the first embodiment only in the structure of the product receiving unit. Unlike the above, other configurations are the same. Therefore, the product receiving unit of the preform unloader according to the second embodiment will be described. FIG. 6 is a cross-sectional view corresponding to a cross-sectional portion in FIG. 4 showing the configuration of the product receiving unit according to the present embodiment. FIG. 7 is a sectional view showing a state in which the preform is not gripped in the sleeve in FIG. 6.

As shown in FIG. 6, the product receiving unit 40
Is a product receiving sleeve 3 for accommodating the preform 10
2, a casing 41 for covering the sleeve 32, a plug 44 provided at the bottom of the mounting hole of the sleeve 32 for receiving the preform 10, a plug 44 and the base end 4 of the casing 41.
1A and a spring (biasing member) 45 interposed therebetween.

The plug 44 is connected to the base 4 of the casing 41.
Each sleeve mounting hole 41f of 1A is provided so as to be movable in the advancing and retreating direction of the preform 10. An air hole 44a is formed from the receiving portion 44A for receiving the preform 10 to the bottom 44B, and a protrusion 44e is formed on the bottom 44B, and the air hole 44a is formed inside the protrusion 44e. Have been. Further, through holes 44c and 44d which are opened on the side surface and communicate with the air holes 44a are formed at appropriate intervals in the protrusion 44e. In addition,
The main body of the plug 44 also has an air hole 44a opened on the side.
There is provided an air hole 44b communicating with the air hole.

An introduction hole 41c is formed in the sleeve mounting hole 41f of the base end portion 41A, but the projection 44e is adapted to slide into the introduction hole 41c. In the state shown in FIG. The introduction hole 41c is closed by the projection 44e,
The air passage 41b is separated from the sleeve mounting hole 41f. Then, as shown in FIG. 6, when the protrusion 44e projects toward the air passage 41b from the introduction hole 41c, the through hole 44c is located on the air passage 41b side, and the through hole 44d is located on the sleeve attachment hole 41f side. As a result, the air passage 41b and the sleeve mounting hole 41f communicate with each other through the through hole 44c, the air hole 44c, and the through hole 44d.

The spring 45 is connected to the bottom 44 B of the plug 44.
And the base end 41A, and urges the plug 44 toward the distal end of the sleeve 32. Then, the projection 44e of the plug 44 and the introduction hole 41c of the casing 41 are formed.
Together, they constitute an on-off valve. The urging force of the spring is set to be stronger than the suction force of negative pressure air for gripping the preform applied to the head of the protrusion 44e.

Since the preform removal machine according to the second embodiment of the present invention is configured as described above, when the preform 10 is not housed in the sleeve 32, as shown in FIG. The hole 41c is closed by the protrusion 44e, and the through hole 44c is also closed. Therefore, the suction force of the negative pressure air for gripping the preform does not act on the plug 44 itself, and no external air is sucked from the air hole 44a.

Next, when the preform 10 is inserted into the sleeve 32 and the receiving portion 44A of the plug 44 is pressed down by the bottom surface 10a of the preform 10, the projecting portion 44 is formed.
e protrudes toward the air passage 41b from the introduction hole 41c, and a through hole 44c formed in the side surface is opened to the air passage 41b. Then, the air passage 41b and the sleeve mounting hole 41f
Are communicated through the through hole 44c, the air hole 44a, and the through hole 44d, and the negative pressure air for gripping the preform is introduced into the sleeve mounting hole 41f. The suction force by the negative pressure air for gripping acts.

Here, the urging force of the spring 45 is
The suction force is set weaker than the suction force acting on the entire cross section of 4B. Then, the plug 44 is further pulled toward the bottom of the sleeve mounting hole 41f by this suction force, and at the same time, outside air is sucked from the air hole 44a. Then, the bottom surface 10a of the preform 10 is adsorbed to the receiving portion 44A by the suction force, and the preform 10 is held in the sleeve 32.

Conversely, when the preform 10 is transferred to the preform tray 9, the suction force acting on the bottom surface 10a of the preform 10 is released by switching the switching valve 29 to the preform removal side. . Then, the reform 10 naturally falls from the receiving portion 44A and is transferred to the support portion 9a of the preform tray 9. At this time, the suction force acting on the plug 44 is also released, so that the plug 44 is pushed back to the original state by the urging force of the spring 45, and the introduction hole 41c is closed by the projection 44e, and again the connection with the outside is made. The air passage 41b is shut off.

If the biasing force of the spring 45 is too strong, the preform 10 may be deformed when the preform 10 is pressed against the plug 44. Therefore, the biasing force of the spring 45 should be reduced as much as possible. Projection 44e and introduction hole 4
It is desirable that the valve is adjusted to the limit at which the on-off valve constituted by 1c operates as described above, that is, to a level slightly higher than the suction force acting on the head of the projection 44e.

As described above, according to the preform removal machine of the present embodiment, the opening / closing valve is constituted by the projection 44e projecting from the plug 44, the introduction hole 41c drilled in the casing 41, and the spring 45. Preform 10
Is not inserted into the sleeve 32, the on-off valve is closed, and the outside and the air passage 41b are shut off. Therefore, even when some of the preforms 10 taken out from the movable mold 5 are missing, the outside air flows from the air holes 44 a of the vacant sleeve 32 into the air passage 41.
Therefore, it is possible to prevent the negative pressure for gripping the preform from being lowered.

It should be noted that the present invention is not limited to the above-described embodiments, and can be implemented with various modifications without departing from the spirit of the present invention. For example, as shown on the left side of FIG. 8, the casing 31 may be configured to be able to be divided into two first casings 50 and a second casing 51. In this case, the casings 50 and 51 are connected by fasteners such as bolts (not shown), the connecting portion 31D is sealed with packing or the like so as to maintain sufficient watertightness and airtightness, and one or more sleeve mounting holes are formed. The additional casing 52 provided is provided separately.

When the casing 31 is configured as described above, as shown on the right side of FIG. 8, the connection of the connecting portion 31D is released to divide the casing 31, and the additional casing 52 is interposed at the divided portion. Thus, the number of the sleeves 32 of the casing 31 can be easily increased. In addition to dividing the casing 31 into two casings 50 and 51 and interposing the additional casing 52, a removable lid is formed at the end of the casing 31 and the lid is removed and added there. It is also possible to connect the casings for use.

[0061]

As described above in detail, according to the preform removing machine of the first aspect of the present invention, a plurality of sleeves are inserted into the integrally formed casing to constitute the product receiving unit. Therefore, the number of parts is small and the structure is simple, so that the cost can be reduced.

The cooling water flow space formed between the sleeve and the casing is formed in a film shape so as to communicate between the sleeve mounting holes while maintaining a constant gap from the outer peripheral surface of the sleeve. Therefore, a large amount of cooling water can be flowed, and a high cooling capacity can be obtained. According to the preform removal machine of the present invention described in claim 2, in addition to obtaining the same effect as the preform removal machine of claim 1, a plurality of product receiving units are provided on the support frame, and Since the one cooling water outlet and the other cooling water inlet between the product receiving units are connected by a cooling water distribution pipe, cooling water is introduced from a cooling water distribution pipe for water supply of the product reception units at both ends, By draining from the drainage cooling water flow pipe, all the preforms held by each sleeve can be cooled consistently.

According to the preform removal machine of the third aspect of the present invention, the same effect as that of the preform removal machine of the first or second aspect can be obtained, and the support frame is used for adding a product receiving unit. Since the mounting part is provided, the product receiving unit is installed so that the air passage is connected to the air supply / discharge path of the support frame, and the product receiving unit is easily connected to the adjacent product receiving unit by the cooling water flow pipe. The number of product receiving units can be increased, and the number of preforms handled can be increased.

According to the preform removal machine of the present invention described in claim 4, in addition to obtaining the same effects as those of the preform removal machine of claims 1 to 3, the casing is configured to be dividable. In addition, since an additional casing having a sleeve mounting hole is provided, the number of sleeves in the product receiving unit can be easily increased by dividing the casing and interposing the additional casing at the divided portion. Thus, the number of preforms handled can be increased.

According to the preform removal machine of the present invention described in claim 5, the same effect as that of the preform removal machine described in claims 1 to 4 can be obtained, and the air hole of the plug can be changed according to the movement of the plug. There is an on-off valve that opens and closes, so if the preform is not inserted into the sleeve,
The on-off valve is closed, and the outside and the air passage are shut off. Therefore, even when some of the preforms removed from the mold are missing, the outside air does not enter the air passage from the air holes of the vacant sleeve, and the required pressure for gripping the preform is prevented from lowering. can do.

According to the preform removing machine of the present invention, the same effect as the preform removing machine of the first to fifth aspects can be obtained. Although the preform is received, the forward / backward actuator, slide actuator, and rotary actuator are attached to the support frame supporting the product receiving unit. Preforms can be delivered.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration of a preform unloader as a first embodiment of the present invention and a positional relationship among an injection molding machine and a conveyor.

FIG. 2 is a side view as viewed from a section AA in FIG. 1;

FIG. 3 is an enlarged view of a part D in FIG. 2 showing a configuration of a preform removal cooling device in the preform removal machine of the first embodiment.

FIG. 4 is a sectional view taken along the line BB of FIG. 3, showing a configuration of a product receiving unit in the preform unloading machine of the first embodiment.

FIG. 5 is a sectional view taken along line CC of FIG. 4;

FIG. 6 is a diagram corresponding to a cross-sectional portion of FIG. 4 showing a configuration of a product receiving unit in the preform removal machine of the second embodiment.

FIG. 7 is a view showing a configuration of a product receiving unit in a state where a preform is not gripped by a sleeve in FIG. 6;

FIG. 8 is a schematic explanatory view for explaining a method of adding a sleeve.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Injection molding machine 2, 3 Mold board 4, 5 Die 7 Preform removal machine 8 Conveyor 9 Preform tray 10 Preform 12 Preform removal cooling device 13 Rotary drive mechanism 14 Preform removal movement mechanism provided with advance / retreat actuator 15 Horizontal transport mechanism 15a Servo motor (slide actuator) 16 Tray lift 23, 40 Product receiving unit 24 Support frame 24a Air supply / discharge channel 26 Rotary actuator 27a, 27b, 27c Flexible pipe (cooling water flow pipe) 31, 41 Casing 31a Cooling Water circulation spaces 31b, 41b Air passages 41c Inlet holes constituting an on-off valve 31d Cooling water inlet 31e Cooling water outlet 31f Sleeve mounting holes 32 Sleeves 34, 44 Plugs 34a, 44a Air holes 44e Protrusions constituting an on-off valve Part 45 spring (biasing member) 52 for expansion casing

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B29C 49/64 B29C 49/64 // B29L 22:00

Claims (6)

[Claims] 1. A preform take-out machine which takes out a plurality of cylindrical preforms, which are formed in a row by an injection molding machine and is simultaneously molded, and transfers the preforms to a conveyor while cooling the same. A product receiving unit for simultaneously receiving the preforms from the mold, and a support frame for supporting the product receiving unit, wherein the product receiving unit is arranged in a direction corresponding to an axial direction of the preform on the mold side. A plurality of product receiving sleeves disposed therein, a plurality of sleeve mounting holes arranged in a line, and a casing in which each of the sleeves is inserted in each of the sleeve mounting holes. The sleeve is formed in a film shape between the inner peripheral surface of the hole and the outer peripheral surface of the sleeve, and is formed so as to communicate between the sleeve mounting holes. A cooling water flow space closed watertight at both ends of the cooling water, a cooling water inlet for introducing cooling water into the cooling water flow space, and a cooling water outlet for discharging cooling water from the cooling water flow space; It is disposed closer to the base end than the circulation space, communicates with an air supply / discharge passage formed in the support frame, and introduces air of a required pressure for gripping or removing the preform through the air supply / discharge passage. A preform receiving plug having an air passage formed at each of the bottoms of the sleeve mounting holes and an air hole for introducing the air for gripping or removing the preform from the air passage to the bottom of each sleeve mounting hole. Characterized by being installed,
Preform removal machine. 2. The preform is configured to be simultaneously molded in a plurality of rows by the injection molding machine, and a plurality of the product receiving units are provided for each of the preform rows. Each of the product receiving units is coupled to the support frame such that the air passage is connected to the air supply / discharge passage in the support frame. The cooling water flow pipe connecting the cooling water outlet of one product receiving unit and the cooling water inlet of the other product receiving unit is interposed therebetween. Renovation take-out machine. 3. A mounting portion for adding a product receiving unit is provided on the support frame so as to be continuous with a portion where the product receiving unit is already provided. A cooling water inlet or a cooling water outlet of the expanded product receiving unit, and a cooling water inlet or outlet of the expanded product receiving unit, wherein the air passage is connected to the air supply / discharge passage in the support frame. The cooling water flow pipe is interposed between the cooling water outlet or the cooling water inlet of the existing product receiving unit adjacent to the product receiving unit, so that the product receiving unit can be added. The preform removal machine according to claim 1 or 2, wherein: 4. An additional casing having the sleeve mounting hole into which the sleeve is inserted, wherein the additional casing has a sleeve mounting hole, and the additional casing is interposed at a divided portion of the casing. The preform removal machine according to any one of claims 1 to 3, wherein the sleeve provided on the casing can be added. 5. The preform receiving plug is provided at the bottom of the sleeve mounting hole so as to be movable in the direction of advance and retreat of the preform into the sleeve, and is adapted to move the plug in the direction. An on-off valve for opening and closing the air hole of the plug in response thereto, and an urging member for urging the plug toward the inlet of the sleeve so as to oppose the direction of entry of the preform, is provided. The on-off valve closes when the plug is in a position moved toward the inlet of the sleeve by the urging force of the urging member without the preform entering the sleeve, and the preform enters the sleeve. The preform removal machine according to any one of claims 1 to 4, wherein the plug is opened when the plug is pressed by the preform and moved to the bottom of the sleeve. 6. The injection molding machine is configured to form the preform in a horizontal direction, and the support frame drives the product receiving unit in a horizontal direction when receiving the product. Reciprocating actuator,
After receiving the product, a slide actuator that slides the product receiving unit onto a preform tray horizontally arranged adjacent to the injection molding machine, and the product receiving unit that takes out the preform in a horizontal direction. 6. A rotary actuator for rotating around a horizontal axis and rotating the preform in a vertical direction along a preform supporting direction of the preform tray. The preform removal machine according to any one of the above.