JPS5987133A - Injection, stretching and blow molding method and apparatus therefor - Google Patents

Abstract

PURPOSE:To make the titled apparatus small, by moving a parison by a reciprocating gripper apparatus, and providing a plurality of parison temperature regulating sections. CONSTITUTION:A parison 68 is molded in an injection mold attached to a clamping apparatus 16, and is taken out from the injection mold through a moving parison temperature regulating cylinder 22 capable of being moved between the outside and the inside of the clamping apparatus 16, and the temperature of the parison is regulated. Then the parison is taken out from the moving parison temperature regulating cylinder 22, is housed in a stationary parison temperature regulating cylinder 28 once thereby subjecting the parison to the second temperature regulation, and then is taken out to be contained in a blow mold 30, and an orientation rod 66 is extended into the parison 68 while compressed air is blown into the parison to mold a hollow item. Therefore, the area for installation of the apparatus can be reduced and the molding speed can be increased.

Description

Detailed Description of the Invention The present invention provides a method for manufacturing hollow containers using synthetic resin materials such as polyethylene terephthalate and polypropylene.
The present invention relates to an injection stretch blow molding method and an apparatus for implementing this method.

Conventional injection stretch blow blow molding equipment, for example,
There is one shown in No. 7-93125. This injection stretch blow molding apparatus has a parison injection molding section, a parison temperature adjustment section, a parison stretch blow molding section, and a hollow molded product release section arranged in a straight line, and neck molds arranged for each of these sections. are linearly moved sequentially and simultaneously from the parison injection molding section to the hollow molded product mold release section, and when each neck mold is stopped, molding and mold release are performed at each part, and after the hollow molded product is released, the neck mold is During the molding time, the parison is circulated to the parison injection molding section in preparation for the next molding.

However, in the conventional injection stretch blow molding equipment as described above, it is necessary to circulate and move the neck mold, so the equipment for carrying out this method becomes large, and the installation of the equipment requires a large size. needed space. In addition, parison injection molding section, parison temperature adjustment section,
Since a neck mold was required for each of the stretch blow molding part of the parison and the mold release part of the hollow molded product, a large number of expensive neck molds were required, and when the shape of the parison was changed, etc.
It required a great deal of expense. In addition, among the operations of parison injection molding, parison temperature adjustment, parison stretch blow molding, and blow molded product release, parison temperature adjustment required the longest time, so the cycle time required for this injection stretch blow blow molding equipment was The molding speed was regulated by the parison temperature adjustment time, making it difficult to control the molding speed.

The present invention can be applied to conventional injection stretch blow blow molding equipment.
This was done by focusing on the problems mentioned above, and by moving the parison by a gripper device that moves the parison back and forth, the neck mold is provided only in the injection mold, and by providing multiple parison temperature adjustment parts. , aims to solve the above problems.

The present invention will be described below with reference to FIGS. 1 to 3 of the accompanying drawings.

The injection stretch blow molding apparatus according to the present invention includes a protrusion section 2, a mold clamping section 4, an F51 parison temperature control section 6, a second parison temperature control section 8, and a parison stretch blow molding section arranged in a straight line on a bed 1. 10 and a hollow molded product discharge section 12. An injection device 14 is installed in the injection section 2 .

The mold clamping section 4 includes a mold clamping device 16, and an upper injection mold 18 and a lower injection mold 20 that are held in the mold clamping device 16. The injection device 14 is capable of injecting molten resin into the lower injection mold 20 . The first parison temperature adjustment section 6 is provided with a movable parison temperature adjustment cylinder 22 . The movable parison temperature control tube 22 is installed so as to be movable in the horizontal direction on the travel path 24'', and is reciprocated between the first parison humidity control section 6 and the mold clamping section 4 by the action of the air cylinder 26. be able to. The second parison temperature control section 8 has a fixed parison temperature)
■Adjustment tube 28 is fixed. A blow mold 30 is installed in the parison stretch blow molding section 10 . Further, the hollow molded product discharge section 12 has the distance between the tube 22 formed on the horizontal plate 32 and the fixed parison temperature adjustment tube 28, the distance between the fixed parison temperature adjustment tube 28 and the blowing mold 30, and The distances between the blow mold 30 and the discharge holes 34 are all constant and equal distances.

First parison temperature adjustment section 6, second parison temperature adjustment section 8
, parison stretch blow molding section 10 and hollow molded product discharge section 1
A horizontal frame 38 supported with respect to the bed 1 by pillars 36 is provided on one side of the bed 2. The frame 38 has a running path 40 on its upper part, and a temperature adjusting gripper moving stage 42. Gripper moving table 44 for stretch blow molding and gripper moving table 4 for discharge
6 are arranged so as to be movable in the horizontal direction. Gripper moving table 42 for temperature adjustment, gripper moving table 4 for stretch blow molding
4 and the discharging gripper moving table 46 are connected by a connecting rod 47 so as to move together, and the air cylinder 4
8, they reciprocate simultaneously. The temperature adjustment gripper moving table 42 has a temperature adjustment gripper device 52 that can be moved up and down by an air cylinder 50. The temperature regulating gripper device 52 is capable of gripping the parison 68 . The discharging gripper moving table 46 similarly has a discharging gripper device 56 that can be moved up and down by an air cylinder 54. The discharge gripper device 56 is a hollow molded product 7.
0 can be grasped. The stretch blow molding gripper moving table 44 has a stretch blow molding gripper device 60 that can be moved up and down by a hydraulic cylinder 58. This gripper device 60 for stretch blow molding is capable of gripping the parison 68 and also has a blowing pipe 62 for blowing air into the parison 68.
and a stretching rod 66 that can be moved up and down by a hydraulic cylinder 64. In addition, the gripper device 52 for temperature adjustment
and the gripper device 60 for stretch blow molding, and the distance between the crimper device 60 for stretch blow molding and the gripper device R for ejection.
56 is equal to the above-mentioned constant distance, such as between the movable parison temperature control tube 22 and the stationary parison temperature control tube 28 in which the first parison temperature control unit is stopped.

Next, the operation of the above device will be explained.

First, the upper injection mold 18 and the lower injection mold 20 are connected to the mold clamping device 1.
6, the nozzle of the injection device 14 is brought into contact with the lower injection mold 20, and the molten resin is extruded to form a parison 68. When the molding process is completed, the upper injection mold 18 moves upward. At the same time, the hyperactive parison temperature control tube 22 is injected from the air cylinder 26.
Move down to the side. The molded parison 68 is released and moved) and is housed in the noson temperature control cylinder 22.
Move <The parison temperature control cylinder 22 immediately moves to the parison 68.
At the same time, the mold clamping section 4 moves to the first temperature adjustment section 6. The state after the movement is shown in the first parison temperature control section 6 in FIG. Then 1. <Rison 6
8 is grabbed and lifted by the temperature adjusting gripper device W52 which has been lowered by the operation of the air cylinder 50. Next, the temperature adjustment gripper moving table 42 is moved to the left in FIG. 1 by the operation of the air cylinder 48, and the parison 68 is carried above the second parison temperature adjustment section 8. Next, at 1,1, the temperature adjusting gripper device 52 is lowered, and the nokuri 768 is accommodated in the fixed palin temperature adjusting cylinder 28. This state is shown in the second parin 1 grade J circumference section 8 in FIG. Temperature adjustment of the parison 68 continues within the fixed parison temperature adjustment cylinder 28. During,
The temperature adjusting grip, the damper moving table 42, the stretch blow molding gripper moving table 44, and the ejection gripper moving table 46 return to the state shown in FIG. 1 again. When the temperature adjustment of the parison 68 is completed, the gripper device 60 for stretch blow molding is lowered by the operation of the hydraulic cylinder 58 and lifts the parison 68 in the fixed parison temperature adjustment tube 28. Next, the stretch blow molding gripper moving table 44 moves to the left in FIG. 1 and reaches one of the parison stretch blow molding sections 117). When the gripper moving table 44 for stretch blow molding reaches the 1- side of the parison stretch blow molding section 1o, the gripper device 6o for stretch blow molding moves to accommodate the parison 68 in the blow mold 30. Next, the stretched rondro 6 is inserted into the parison 68 by the operation of the hydraulic cylinder 64, and compressed air is also fed into the blowing pipe 62. Stretch blow blow molding is thereby performed to form the hollow molded product 70. This state is shown in the parison stretch blow molding section 10 in FIG. When the molding is completed, the gripper device 60 for stretch blow molding moves "-y", moves rightward, and returns to the state yQ1 shown in FIG. 1. Next, the discharge gripper device 56 is lowered by the actuation of the air cylinder 54 and grips the hollow molded product 70. Next, the blow mold 3o is opened and the hollow molded product 70 is lifted by the ejection gripper device 56. The lifted hollow molded product 70 reaches the second part of the hollow molded product discharge section 12 by moving the discharge gripper moving table 46 to the left. Next, 1.11 Degawa Gripper device 56 opens and 1.11 [
The hollow molded product 7o is discharged from the drain 34. This condition is acceptable 1
is shown in the hollow molded product 1) r-mounted portion 12 in FIG. This completes the molding of one hollow molded product 70.

It should be noted that the above explanation has focused on one parison 68 and the hollow molded product 70, or the mold clamping section 4, the first parison temperature control section 6, the second parison temperature control section 8, B1) Son stretch blow moldingff.

The operations in 10 and the hollow molded product υ11 and 12 are performed continuously in parallel. That is, injection 1-mold 1
8 and the lower injection mold 2o are molded and tightened to form a parison, and before the parison 68 is taken out as shown in the first parison temperature adjustment section 6 in FIG. 1, a temperature adjustment gripper device 52, The gripper device 60 for stretch blow molding and the gripper device 56 for ejection actually perform one cycle as follows.

That is, the gripper device 52 for temperature adjustment and the gripper device 60 for stretch blow molding are first
They descend from the position and wait while each holding the parison 68. On the other hand, at this time, the discharge gripper device 56 grips and holds the hollow molded product 70 after molding.
in position. When the temperature adjustment of the parison 68 in the fixed parison temperature adjustment tube 28 is completed in this state, the stretch blow molding gripper device 60 loads one load, and at the same time, the temperature adjustment gripper device 52 also grips the parison 68. -h. In this way, the temperature control grill, the bar device 52,
Stretch blow molding) η gripper device rJ, 60 and publication gripper device 56 are all in the raised state, temperature adjustment gripper moving table 42, stretch blow molding gripper moving table 44, and discharge gripper moving table 46 leftward movements are performed. By doing this, the temperature regulating gripper device 52 reaches the second part of the second parison temperature regulating section 8, the stretch blow molding gripper device 60 reaches the second part of the parison stretch blow molding section 10, and the ejection clip also reaches the second part of the parison stretch blow molding section 10. , device 5
6 reaches "-Δ1;" of the hollow molded product discharge section 12. When the leftward movement is completed, the temperature regulating gripper device 52
, the stretch blow molding gripper device 60 and the discharge gripper device 56 are simultaneously lowered. Gripper device 5 for temperature adjustment
2 shows the parison 68 inserted into the fixed parison temperature control cylinder 28! Wait there.

Further, after the ejection gripper device 56 ejects the hollow molded product 70 from the ejection hole 34, it waits at 1-FI. When the molding of the hollow molded product 70 in the blow mold 30 is completed,
? The gripper device 52 for adjusting the N degree and the gripper device 60 for stretch blow molding perform LA with the parison 68 and the hollow molded product 70 left in the fixed parison temperature control cylinder 28 and the blow mold 30, respectively. When the temperature adjustment gripper device 52, the stretch blow molding gripper device 60, and the Kudegawa gripper device 56 are all raised, they are moved to the right by the operation of the air cylinder 48.
It returns to the initial position shown in FIG. This allows parison temperature adjustment, parison stretch blow molding, and hollow molded products υ1.
One cycle of output ends. While this one cycle is being executed, the parison 68 is formed in the mold clamping section 4,
The parison 68/o is taken out to the first parison temperature control BB6. Next, each operation is performed continuously without repeating the same steps again.

Below 1. In the injection stretch-blow molding apparatus according to the invention as described, the neck mold is a parison stretch-blow molding γf61
Since it is provided only in the neck mold and there is no need to circulate the neck mold, the device can be made smaller and the installation + (+ mouth k) can be made smaller.In addition, only one neck mold is used for the expensive neck mold. The cost is relatively low even when changing the shape of the parison.Also, since a plurality of parison temperature control tubes (moving parison temperature control tube 22ψ and fixed parison temperature control tube 28) are provided, The parison temperature adjustment time can be known, reducing cycle time and improving efficiency.

In the described embodiment, the fixed parison temperature control cylinder 28 is provided in one stage, but it may be provided in two or more stages as necessary. Further, in the described embodiment, two parisons are passed in parallel, but the number of parisons can be set to any value or low value. If heat treatment of the hollow molded product is necessary, the parison stretch blow molding section 1
A molded product heat treatment section can also be provided between the hollow molded product discharge section 12 and the hollow molded product discharge section 12.

As described above, according to the present invention, the injection stretch blow blow molding method for molding a hollow container using a synthetic resin material involves molding a parison in a dispensing mold that is accessed by a mold clamping device. , the parison is removed from the injection mold and the parison temperature is controlled by a movable parison temperature control cylinder that is movable between the inside and outside of the mold clamping device; The fixed parison temperature control is carried out at least once by placing it in a temperature control cylinder once, or by sequentially placing it in a plurality of fixed parison temperature control tubes, and the parison temperature control is completed. The parison is taken out from the tube and placed in a blow mold, and compressed air is blown into the parison and the stretch iron is stretched to perform stretch blow molding (17). It consists of the above-mentioned steps of taking it out of the mold and transferring it to the hollow molded product #L exit section, and includes the movement of the parison from the moving parison temperature control tube to the fixed parison temperature control tube, and the adjustment of multiple nationally specified parison temperatures. In some cases, the movement of the parison between each identified parison temperature control, the movement of the parison from the parison temperature control cylinder to the blowing mold, and the movement of the hollow molded product from the blowing mold to the hollow molded product discharge section are performed simultaneously in a reciprocating manner. This is done by gripper devices arranged in a moving array, and each cycle of the gripper takes less time than the time required to form the parison in the injection mold and remove it with a moving parison temperature control cylinder. The apparatus for carrying out the above method includes an injection device capable of injecting molten resin, an injection mold for palin molding that receives the molten resin from between the injection folds, and an injection mold. A mold clamping device with several molds in it, a movable parison temperature control tube that can be moved between the inside and outside of the mold clamping device, and a fixed distance from the stopping position of the movable parison temperature control tube outside the mold clamping device. one parison temperature adjustment tube spaced apart from each other by a certain distance, or a plurality of fixed parison temperature adjustment tubes spaced apart from each other by the predetermined distance and arranged in one sequential order, a movable parison temperature adjustment tube, and a fixed parison temperature adjustment tube. a fixed parison temperature control cylinder arranged in alignment with the fixed parison temperature control cylinder, a blowing mold arranged a fixed distance apart from the movable parison temperature control cylinder, a fixed parison temperature control cylinder and the blowing mold arranged in alignment; and a hollow molded product 4 which is placed at a distance from the blowing mold by the predetermined distance.
Jt exit part and movable parison temperature control cylinder outside mold clamping device 7X
A temperature adjustment gripper device that is movable between the 1g stop position and the fixed parison temperature adjustment tt1 and that can grip the parison, and if there are multiple fixed parison temperature adjustment cylinders, each fixed parison temperature adjustment cylinder. A temperature control gripper device that can move between the fixed parison temperature control cylinder and the blowing mold and that can grip the parison, and a blower that blows air into the parison. a gripper device for stretch blow molding with a tube and an extensible drawing rod; a gripper device for extracting movable between the blow mold and the hollow molded product outlet and capable of gripping the hollow molded product; It is characterized by having a mechanism for simultaneously horizontally moving the adjusting gripper device, the stretch blow molding gripper device, and the ejection gripper device, thereby reducing the installation area of the device, mold manufacturing cost, and molding speed. It is possible to obtain the effect of "in the direction of".

[Brief explanation of drawings]

FIG. 1 is a front sectional view (showing the state at the start of a cycle) of the injection stretch blow molding apparatus according to the present invention, and FIG. 2 is a cross section of the injection stretch blow blow molding apparatus shown in FIG. 1 taken along the line Il-Il. 3 are diagrams showing the state of the injection stretch blow blow molding apparatus shown in FIG. 1 during injection molding and stretch blow molding. ■...Bed, 2...Injection part, 4...y1111
000... First parison temperature control section, 8... Second parison temperature control section, 10... Φ-ring stretch blow molding section, 12... Hollow molded product discharge section, 14... Injection device , 16... type cotton packaging - 118 example... injection mold, 20...
・・Lower injection mold, 22 mm ・・Parison temperature control tube, 24
・◆・Traveling path, 26... Air cylinder, 28ψΦφ Rison temperature control cylinder, 30... Blow mold, 32...
Horizontal plate, 34... Discharge hole, 36.e. Support, 38...
・Frame, 40φ...Travel path, 42...Gripper moving table for temperature adjustment, 44...Gripper moving table for stretch blow molding, 46...Ejection gear 1), Tsuku moving table, 47...
・Connecting rod, 48...Air cylinder 1) cylinder, 50...φ air cylinder, 52...Gripper device for temperature adjustment, 54...
... Air cylinder, 56 ... Gripper device for discharge, 5
8...111 JE cylinder, 60... Stretch blow molding glue lJ,)N device, 62/IIΦ blowing pipe, 64#
・Hydraulic cylinder 1 non-da, 66・Q・extension port, end, 68・
... Nono Son, 70 ... Hollow molded product. Patent applicant Nippon Steel Co., Ltd. Agent Patent attorney Miya
Amendment of Interest Proceedings Di Miko February 10, 1959 Mr. Kazuo Wakasugi, Commissioner of the Patent Office■, Indication of the case Patent Application No. 196776 of 1982, Title of the invention Injection stretch blow blow molding method and apparatus 3, Supplementary Representative: 3rd floor, Tateno Mankisawaji Building 105 Phone: 434-8501 Name: (8534) Go 1: Toshiyuki Miyauchi, Physician 5
, Date of amendment order Vol. 7, Contents of amendment as shown in attached sheet Description 1. Name of invention Injection stretch blow blow molding method and apparatus 2. Claim 1. Injection for molding a hollow container using synthetic resin as material. In a stretch blow blow molding device, a parison is molded in an injection mold that can be accessed by a mold line device, and the parison is injected by a movable parison temperature control tube that can be moved between the inside and outside of the mold clamping device surface. At the same time as taking it out of the mold, the parison temperature control 1 is carried out, and the parison is taken out from the movable parison temperature control tube and placed in a fixed parison temperature control tube once, or Ill/i next placement in a plurality of fixed parison temperature control tubes. By doing so,
The parison temperature is adjusted for at least the second time, and the parison is taken out from the fixed valine/temperature adjustment tube after the parison temperature adjustment is completed, placed in a blowing mold, and stretched with a stretching rod. Blow molding is performed to form a hollow molded product, and the hollow molded product is removed from the blow mold and the hollow molded product is
f-1! Transfer to i'iR, −1. Transfer of the parison from the movable parison temperature control tube to the fixed parison temperature control tube, if there are multiple fixed parison temperature control tubes. Movement of the parison between each fixed parison temperature control cylinder, movement of the parison from the fixed parison temperature control cylinder to the blowing mold, and movement of the parison from the blowing mold to the hollow molded product D1 peak part +
The movement of the 7C molded product is performed by each gripper device arranged in an array so as to reciprocate in the horizontal direction at the same time.The time required for one cycle of each gripper device is to mold a parison in an injection mold and move the parison. An injection stretch blow molding method, characterized in that the time required for ejecting the material by one heat treatment is less than F. 2. An injection device capable of injecting molten resin. Injection for parison molding, in which the molten resin from the molten resin is received from the extrusion device - the mold and the lower injection mold are removed (=J is removed from the mold clamping device, and moved between the inside and outside of the mold clamping device) ii) a movable parison temperature control cylinder, and a parison temperature control cylinder disposed at a fixed distance from a stop position outside the mold clamping device of the movable parison temperature control cylinder; A plurality of identified parisons i= arranged in sequence with 1v distances are arranged in a transverse cutter cylinder, a moving parison temperature adjustment cylinder and a fixed parison temperature adjustment cylinder, and a fixed parison temperature adjustment HD cylinder which is arranged in line with a moving parison temperature adjustment cylinder and a fixed parison temperature adjustment cylinder. The blowing mold 6 is arranged at a certain distance apart from the movable parison temperature control cylinder, the fixed parison temperature control cylinder, and the blowing mold are arranged in line with each other and are spaced apart from the blowing mold by a certain distance i (j). It is possible to move between the hollow molded product discharge section located at There is a gripper device for oil adjustment and a plurality of fixed parison temperature control tubes. Stretch blow molding, which is movable between the fixed parison temperature control tube and the blowing mold, is capable of gripping the parison, and is equipped with a blowing pipe for blowing air into the nozzle, and an extendable stretching opening/end. a gripper device for discharging the molded product, a gripper device for discharging the molded product that is movable between the blow mold and the hollow molded product discharging section, and capable of gripping the hollow molded product, a gripper device for temperature adjustment, and a lymphatic device for stretch blow molding. And the mechanism that moves the emissioned glippa to the simultaneous number of the horses, and the injection extension of the ejaculation and the medium empty molding device. 3. Detailed explanation of the invention This invention is polyethylene telephalettalate, poijf. Synthetic resin such as Ropylene. This invention relates to an injection stretch blow molding force method for manufacturing hollow containers using materials, and an apparatus 6 for carrying out this method.For example, as a conventional injection stretch blow molding apparatus, please refer to JP-A-1983-1999. No. 93125.This injection stretch blow blow molding apparatus has a Nocrison injection molding section 111, a Parison temperature adjustment section 7iR1, a Parison stretch blow molding section, and a blow molded product release section. The setup was to linearly move the 2-ink molds arranged for each of these parts sequentially and simultaneously from the 49-inch extrusion molding part to the hollow molded product mold release part,
When each neck mold is stopped, molding and mold release are performed at each part (1), and after the hollow molded product has been released, the neck mold is moved during the molding time to the non-injection molding section and then moved to the next part. The molding number is as follows. However, in the conventional injection stretch blow molding apparatus as described above, it is necessary to circulate and move the mold, so the apparatus for carrying out this method becomes large.
In addition, a relatively large space was required to install the equipment. In addition, the mold release part number for the nonorison extrusion molding 81 (parison temperature adjustment ΔL), the ring stretch blow molding part, and the hollow molded product requires a neck mold, respectively, and the precision of the ・j method requires strict material A large number of expensive neck shapes that are difficult to manufacture and require high hardness are required, and if the shape of the neck is changed, a large amount of cost is required. We also offer parison injection molding, parison temperature adjustment,
Among the operations of parison stretch blow molding and blow molding of the blow molded product, parison temperature adjustment required the longest time, so the cycle time of this injection stretch blow blow molding equipment was regulated by the parison temperature adjustment time. ,
It was difficult to control the molding speed. The present invention can be applied to conventional injection stretch blow blow molding equipment.
- This was done in response to the following problems,
It is proposed to solve the above-mentioned problems by installing multiple molds in the injection mold so that the parison moves along with the parison, and by providing multiple parison temperature adjustment sections. It has been the target. The present invention will be explained below with reference to Figures 1 to 3 of the drawings. , a first parison temperature control section 6, a second parison temperature control section 8, a parison stretch blow molding section 1O, and a middle molded product discharge section 12. An injection device 14 is installed in the injection γiH2. The mold clamping section 4 includes a mold clamping device 16 and a
The upper injection mold 18 and the injection mold 20 having a hollow mold 69 are shown in FIG. The injection device 14 is capable of injecting the molten resin into the lower injection mold 20. The first parison temperature adjustment section 6 is provided with a movable parison temperature adjustment cylinder 22 . The movable parison temperature control tube 22 is connected to the traveling path 2.
4F is installed so as to be movable in the horizontal direction, and can be reciprocated between the first parison temperature jK adjusting section 6 and the mold clamping section 4 by the action of the air cylinder 26. A fixed temperature control tube 28 is fixed to the second parison temperature control section 8 . A blow mold 30 is installed in the parison stretch blow molding section 10. Note that the blow mold 30 can be opened and closed left and right by known means. Also,
The hollow molded rice grain volume section 12 is provided with a discharge hole 34 formed in a horizontal plate 32 that partitions the inside of the device from the outside i':R and serves as a safety cover. Note that the distance between the movable parison temperature adjustment tube 22 stopped at the first parison temperature adjustment section 6 and the fixed parison temperature adjustment tube 28, the distance between the fixed parison temperature adjustment tube 28 and the blowing mold 30, and the blowing The distances between the mold 30 and the discharge holes 34 are all constant and equal distances. Above the first parin temperature adjustment part 6, the second parin one-by-one adjustment part 8, the parison stretch blow molding part 10, and the hollow molded product ejection part 12, there is a horizontal column supported with respect to the pend 1 by a column 36. A frame 38 is provided. The frame 38 has a running path 40 in a part thereof, and on this running path 40, a gripper moving table 42 for temperature adjustment, a gripper moving table 44 for stretch blow molding, and a gripper moving table ↓6 for discharging are installed horizontally. It is arranged so that it can be moved in the direction. Temperature adjustment gripper moving table 42, stretch blow molding gripper moving table 44, and discharge gripper moving table 46
are connected by a connecting rod 47 so as to move together, and reciprocate simultaneously by the action of an air cylinder 48. The temperature adjustment gripper moving table 42 is a temperature adjustment gripper device 52 that can be moved up and down by an air cylinder 50.
have. The temperature regulating gripper device 52 can grip the parison 68 . Ejection gripper moving table 4
6 also has a discharge gripper device 56 which can be moved up and down by an air cylinder 54. The discharge gripper device 56 can grip the hollow molded product 70. The stretch blow molding gripper moving table 44 has a stretch blow molding gripper device 60 that can be moved downward by a hydraulic sill 58. This stretch blow molding gripper device 60 is
It is provided with a stretching rod 66 capable of gripping the parison 68 and movable downward by a blow pipe 62 and a hydraulic cylinder 64 for blowing air into the parison 68. A detailed explanation of the chestnuts, pads 52, 56, and 60 will be omitted, but all of them are equipped with a means for opening and closing claws, and are capable of adjusting the temperature of the parison and gripping the hollow molded part. In addition, the temperature adjustment gripper device 52
and the stretch blow molding gripper device 60 and the stretch blow molding gripper device 60 and the ejection gripper device 5
6 is set equal to the above-mentioned constant distance between the movable parison temperature control @ 22 stopped at the first parison temperature control section 6 and the fixed parison temperature control cylinder 28, and then,
The operation of the above device will be explained. First, the upper injection mold 18 and the lower injection mold 2o having neck molds 69 are clamped by the mold clamping device 16, the nozzle of the injection device 14 is brought into contact with the lower injection mold 2o, and the molten resin is extruded into the parison. 68 is molded. When the molding is completed, the upper injection mold 18 is moved to the top 1), and the molded parison 68 is held in the Neck mold 69, and the upper injection mold 18 is moved to the top 1.
do. At the same time, the moving parison temperature control cylinder 22 is moved by the action of the air cylinder 26. 11! I8
Move in the direction of. The molded parison 68 is injected by known means after the mold 69 is opened.
The mold is released from the mold and housed in the moving parison temperature control cylinder 22. The movable parison temperature adjustment tube 22 immediately starts temperature adjustment of the parison 68 and moves from the mold clamping section 4 to the first parison temperature adjustment section 6. The state after the movement is shown in the first parison temperature control section 6 in FIG. Next, parison 6
8 is lifted up by the temperature adjusting gripper device 52 which has been lowered by the operation of the air cylinder 50 and is gripped by the neck portion. Next, the temperature adjusting clipper moving table 4
2 is moved to the left in FIG. 1 by the operation of the air cylinder 48, and the parison 68 is carried above the second parison temperature control section 8. Then, the temperature regulating gripper device 52 is lowered and the parison 68 is accommodated in the fixed parison temperature regulating tube 28 . This state is shown in the second temperature control section 8 in FIG. Temperature adjustment of the parison 68 continues within the fixed parison temperature adjustment cylinder 28. In the meantime, the temperature adjusting gripper moving table 42, the stretch blow molding gripper moving table 44, and the discharge gripper moving table 46 return to the state 1C shown in FIG. When the temperature adjustment of the parison 68 is completed, the gripper device 60 for stretch blow molding is lowered by the operation of the hydraulic cylinder 58, grips the parison 68 in the fixed parison temperature adjustment tube 28, and lifts it up. Next, the stretch blow molding gripper moving table 44 moves to the left in FIG. 1 and reaches the parison stretch blow molding section 1O. The gripper moving table 44 for stretch blow molding is located in the parison stretch blow molding section lO.
Once above the stretch blow molding gripper device 60 is lowered to accommodate the parison 68 within the blow mold 30. Next, the stretching rod 66 is extended into the parison 68 by the operation of the hydraulic cylinder 64, and extends downward while holding the core at the bottom of the parison so that it does not swing. It is also stretched in the transverse direction of feeding. Stretch blow blow molding is thereby performed to form the hollow molded product 70. This state is shown in the parison stretch blow molding section IO in FIG. When the molding is completed, the gripper device 60 for stretch blow molding is separated, moved to the right, and returned to the state shown in FIG. 1. Then, the discharge gripper device 56 descends by actuation of the air cylinder 54 and grips the neck portion of the hollow molded product 70 . The blow mold 30 is then opened and the hollow molded product 70 is lifted by the ejecting gripper device 56. The lifted hollow molded product 70 reaches the second part of the hollow molded product discharge section 12 by moving the discharge gripper moving table 46 to the left. Then, the ejecting gripper device 56 is lowered,
The hollow molded product 70 is discharged from the discharge hole 34. This state jEq is shown in the hollow molded product discharge section 12 in FIG. This completes the molding of one hollow molded product 70. Note that the above explanation has been made with attention to the L parisons 68 and the hollow molded product 70, but the mold clamping section 4, the first parison temperature adjustment section 6, the second parison temperature adjustment section 8,
Parison stretch blow molding section 10 and υ゛ hollow molded product discharge section 1
The operations in 2 are performed continuously in parallel. That is, after the upper injection mold 18 and the lower injection mold 20 are clamped to perform parison molding, and before the parison 68 is taken out as shown in the first parison temperature adjustment section 6 in FIG. The gripper device 52, the gripper device 60 for stretch blow molding, and the crimper device 56 for discharge perform one cycle as follows. That is, the temperature adjusting gripper device 52 and the stretch blow molding gripper device 60 first descend from the initial positions shown in FIG. 1 and wait while each gripping the parison 68. On the other hand, at this time, the discharging gripper device 56 is at the upper position A where it grips and holds the hollow molded product 70 after molding. When the temperature adjustment of the parison 68 in the fixed parison temperature adjustment cylinder 28 is completed in this state, the stretch blow molding crimper device 60 is moved to TR, and at the same time, the temperature adjustment gripper device 52 is also raised while gripping the parison 68. do. In this way, when the temperature adjustment gripper device 52, the stretch blow molding gripper device 60, and the U1 output gripper device 56 are all in the "-H" state, the temperature adjustment gripper moving table 42, the stretch blow molding gripper moving table 44, and the The extraction gripper moving table 46 is moved to the left. By doing this, the temperature regulating gripper device 52
reaches the upper part of the second parison temperature control section 8, and the stretch blow molding gripper device 60 reaches the parison stretch blow molding f4fi.
The upper part of the IO is reached, and the ejecting gripper device 56 reaches a part of the hollow molded part ejecting section 12. When the movement to the left is completed, the temperature adjustment gripper device 52, the stretch blow molding gripper device 6o, and the discharge gripper device R56 are lowered at the same time. The temperature regulating gripper device 52 stands by with the parison 68 inserted into the temperature regulating tube 28. Further, after the ejection clipper device 56 ejects the hollow molded product 70 from the ejection hole 34, the ejection clipper device 56 stands by in the state of "-A". When the molding of the hollow molded product 70 in the blow mold 30 is completed, the temperature adjusting clipper device 52 and the stretch blow molding gripper device δ60 move the parison 68 and the hollow molded product 70 to l! I; I constant temperature control cylinder 28 and blowing mold 3
1-R while leaving it within 0. In this way, when the temperature adjustment clipper A i';52, the stretch blow molding gripper device 60, and the Degawa gripper device 56 are all in the closed state, they are moved to the right by the operation of the air syringe 48. The cycle of parison temperature adjustment, parison stretch blow molding, and hollow molded product ejection is completed.
do. While this 1 cycle is being executed, the parison 68 is molded in the mold clamping section 4, and the parison 68 is taken out to the first parison temperature control section 6. Each operation is then performed sequentially without repeating the same steps again. In the injection stretch blow blow molding apparatus according to the present invention as described above, the neck mold 69 that forms the neck part of the parison 68 is provided only in the mold clamping part 4, and there is no need to circulate the neck mold 69. , it is possible to downsize the device and reduce the installation area. Also, the expensive neck 56
9, only the mold clamping part 4 is used, and even when changing the shape of the parison, it is only necessary to replace the neck mold 69 of the mold clamping part 4, so the cost is relatively low. In addition, a plurality of parison temperature adjustment cylinders (moving parison temperature adjustment cylinder 22 and fixed parison 11. adjustment t, force 28)
Since the parison temperature adjustment cylinder is provided with a temperature control tube, the parison temperature adjustment time for each parison temperature control tube can be shortened, and the overall molding cycle required can be shortened. Although the cylinder 28 is provided in one stage, it may be provided in two or more stages as necessary. In addition, in the described embodiment, two parisons are flown in parallel.
Although the number of pieces is set as individual pieces, the number of pieces can be set arbitrarily. In addition, when heat treatment of the hollow molded product is required, the parison stretch blow molding section 10 and the hollow molded product discharge section 1 are provided.
A molded article heat treatment section may also be provided between the two. As explained above, according to the present invention, the injection stretch blow blow molding method for molding a hollow container using a synthetic resin material is as follows: When the parison is removed from the injection mold, the temperature is adjusted by a movable cylinder that can be moved between the inside and outside of the mold clamping device. 1. Take out the parison from the temperature control cylinder, fix it, and place it once in the temperature control cylinder.
In addition, it is preferable to sequentially accommodate a plurality of fixed parisons in a temperature control tube, etc. After the parison temperature control has been completed, the parison is taken out from the fixed parison temperature control cylinder, housed in a blowing mold, and a stretching rod is inserted into the parison. Consisting of the above-mentioned steps of elongating and blowing compressed air to perform stretch blow blow molding to form a hollow molded product, and taking out the hollow molded product from the blow mold and transferring it to the hollow molded product discharge section,
Moving the parison from the movable parison temperature control tube to the fixed parison temperature control tube, moving the parison between each fixed parison temperature control when there are multiple fixed parison temperature control tubes, etc., and moving the parison from the identified parison temperature control tube to the blowing mold. The movement of the parison from the blowing mold to the hollow molded product exit section is carried out by each gripper device arranged in a line so as to reciprocate at the same time. The time required for one cycle is less than the time required to mold the parison in the 04 shoe mold and take it out by the movable parison temperature control tube.
- The equipment for carrying out the force distribution method consists of an injection device capable of injecting molten resin, a mold clamp with several injection upper molds and injection F molds for parison molding that receive the molten resin from the injection device. a movable parison temperature regulating tube movable between the inside and outside of the mold clamping device; and a movable parison temperature regulating tube disposed at a predetermined distance from a stop position outside the mold clamping device of the movable parison temperature regulating tube. a plurality of fixed parison temperature control tubes or JLs, which are arranged in sequence and arranged at intervals of the predetermined distance, and a movable parison temperature control tube and a fixed parison temperature control tube, and a blow mold disposed at a distance from the fixed parison temperature control cylinder; a movable parison temperature control cylinder, a fixed parison temperature control cylinder, and a blow mold arranged in alignment with the fixed parison temperature control cylinder and the blow mold at the predetermined distance; A gripper device for temperature adjustment that is movable between a separately arranged hollow molded product discharge section, a stopping position outside a mold clamping device for a movable parison temperature adjustment tube, and a fixed parison temperature adjustment tube, and that is capable of gripping a parison. If there is a plurality of defined barring temperature 1 & adjustment cylinders, a gripper device for temperature adjustment that can move between each fixed parison warm melon adjustment cylinder and can grip the parison is used as a gripper device (fixed barin). A gripper device for stretch blow molding that is movable between a temperature control tube and a blow mold, has a gripping capacity of <Rin 7 = T, and is equipped with a blow pipe for blowing air into the parison and an extendable stretch rond. , a discharge clipper device that is movable between the blow mold and the hollow molded product discharge section and capable of gripping the hollow molded product, a temperature adjustment gripper device, a gripper for stretch blow molding, a gripper device, and a telephone outlet. The present invention is characterized by having a mechanism for simultaneously moving the gripper device for use in the wood IP direction,
It is possible to obtain the effects of reducing equipment installation surface roughness, reducing mold manufacturing costs, and increasing molding speed. 4. Brief description of the drawings Figure 1 is a front cross-sectional view of the injection stretch blow blow molding apparatus according to the present invention (showing the state at the start of the cycle), and Figure 2 is a cross sectional view of the injection stretch blow blow molding apparatus shown in Figure 1. FIG. 3 is a sectional view taken along the line rr-u, showing the state of the injection stretch blow molding apparatus shown in FIG. 1 during injection molding and stretch blow molding. l...to, de, 2 life...injection part, 4...mold clamping part, 6
...First parison temperature control section, 8...Second parison temperature control section, 10-...Nonorinon stretch blow molding section, 1
2... Hollow molded product discharge section, 14... Injection device, 16
... Mold clamping device, 18... Injection'' - Mold, 20...
Injection mold, 22...Parison temperature control cylinder, 24...
・Travel path, 26...Air cylinder', 28...Nonorinonn1 fertility adjustment cylinder, 30...Blowing mold, 32...
・Water 5P plate, 34...Drain hole, 36...Strut, 38
. . . Frame, 40 .
・・Connection material, 4th day・・Air cylinder, 50ψ・Air cylinder, 52＠・Gripper device for temperature adjustment, 54・
・Air silling, 56 ・Discharge grill, par device, 5
8...Hydraulic cylinder, 60...Stretch blow molding phase grinding device, 62--Stretch blow molding 76.64...Hydraulic cylinder, 66-Fist stretch blow molding phase grinding device, 68...
・Nokurin 7.69・・O-neck type.

Claims (1)

[Claims] 1. In an injection stretch blow blow molding machine that molds hollow containers using synthetic resin as a monthly charge, a parison is molded in an injection mold that can be accessed by a mold clamping device, and the inside of the mold clamping device and The parison is taken out from the injection mold and the parison humidity is controlled by a movable parison temperature control cylinder that can be moved between the outside and the parison.
The temperature of the parison is adjusted at least once by storing the parison twice or by sequentially storing it in a plurality of fixed parison temperature control cylinders, and then the parison is removed from the fixed parison temperature control cylinder after the parison temperature adjustment has been completed, and the parison is removed from the blowing chamber. The parison is placed in a mold, compressed air is blown into the parison, and the stretch rond is stretched to perform stretch blow blow molding to form a hollow molded product.The hollow molded product is taken out of the blow mold and placed in the hollow molded product υ1 peak. transferring the parison, comprising moving the parison from the moving parison temperature control tube to the fixed parison temperature control tube, moving the parison between the identified parison temperature control tubes or each fixed parison temperature control tube if there are any; , the movement of the parison from the parison temperature control cylinder to the blowing mold, and the movement of the hollow molded product from the blowing mold to the hollow molded product discharge section are simultaneously aligned so as to move back in the horizontal force direction. This is carried out by each gripper device arranged, and the time required for one cycle of each gripper device is less than or equal to the time required to form the parison in the dispensing mold and remove it by the moving parison temperature control tube. Injection stretch blow molding method. 2. An injection device capable of injecting molten resin; a mold clamping device capable of handling a mold and a lower injection mold; a movable parison temperature control tube movable between the inside and outside of the parison temperature control tube; and one parison temperature control tube disposed at a fixed distance from a stopping position outside the mold clamping device of the movable parison temperature control tube or each other. a plurality of fixed parison temperature control tubes arranged in sequence at intervals of a certain distance; and a plurality of fixed parison temperature control tubes arranged at a constant distance from the movable parison temperature control tube and the fixed parison temperature control tube, and the fixed parison temperature control tube and the fixed parison temperature control tube. A blowing mold arranged at a distance from the movable parison temperature regulating tube, a fixed parison temperature regulating tube, and a blowing mold arranged in line with the blowing mold and spaced apart from the monthly blowing mold by the fixed distance. a gripper device for temperature adjustment that is movable between a stop position outside the mold clamping device of the movable parison temperature adjustment tube and the fixed parison temperature adjustment tube and capable of gripping the parison; and the fixed parison temperature adjustment tube. If there are multiple parison temperature control cylinders, a temperature control gripper device that can move between each fixed parison temperature control cylinder and grip the parison, and a temperature control gripper device that can move between the fixed parison temperature control cylinder and the blowing mold and that can grip the parison. A gripper device for stretch blow molding, which is capable of gripping the air, is equipped with a blow pipe for blowing air into the parison, and an extendable stretching iron, and is movable between the blow mold and the hollow molded product discharge section, and An injection stretch blow molding device comprising: a discharge gripper device capable of gripping a hollow molded product; and a mechanism for simultaneously moving the temperature adjustment gripper device, the stretch blow molding gripper device, and the discharge gripper device in a horizontal force direction.