JPH0649330B2 - Injection stretch blow molding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an injection stretch blow molding machine capable of continuously carrying out one cycle of molding process by moving a neck mold holding a parison, particularly a neck mold. Of the transportation means of

[Prior Art] As a structure for moving a neck die to each stage that realizes a one-cycle molding process, there are those disclosed in Japanese Patent Publication No. 53-22096 and Japanese Patent Publication No. 40403/64.

In the former type, a neck mold is arranged on all four sides of a circular rotary member, and an injection molding stage, a heating stage, a stretch blow molding stretch stage, and a molded product release stage are arranged at opposite positions. I have set up. The neck mold can be sequentially transferred to each stage by driving the rotating member to rotate intermittently.

On the other hand, the latter shows a first path for transferring the neck mold to various stages for realizing the injection stretch blow molding, and a neck formed in parallel with the first path after the completion of one cycle of the molding process. A second path for returning the mold to the first path. The neck type is an actuator that is transported by the conveyor device through the above two paths and that slides the neck type by one stage.
It has means for transferring between the first paths and an actuator for returning and transferring the neck mold on the second path.

[Problems to be Solved by the Invention] In each of the above-described two conventional techniques, the neck type is circularly moved along a loop-shaped path. However, in developing an apparatus capable of injection stretch blow molding of a parison having a large diameter, the following problems have occurred when the above two conventional techniques are applied as they are.

In order to obtain a molded product having a large parison diameter, the diameter of one neck die must be increased, and at the same time, the arrangement distance of the neck dies in the longitudinal direction must be increased. Therefore, there is no choice but to increase the distance (span) between the tie bars that guides the mold clamping mechanism up and down.

At this time, according to the structure disclosed in Japanese Patent Publication No. 53-22096, the tie bar must be arranged at a position where it does not interfere with a member that is rotationally driven by the rotating member. For this reason, the span of the tie bar must be made longer, and if a mold clamping mechanism of several hundred tons is used to obtain a molded product with a large parison diameter, design it with sufficient strength to withstand the bending moment. Inevitably, there was a problem that the device became large.

On the other hand, according to the configuration disclosed in JP-A-64-40316, the neck mold is slid in and out on the injection molding stage so that the tie bar span is minimized even if the parison diameter increases. You can stop to the limit. However, according to this conventional technique, the first method for performing injection stretch blow molding is used.
In addition to the above-mentioned route, the second route for returning and conveying the neck mold is purposely provided separately, so that the structural problem that the device becomes large cannot be solved by this amount.

Therefore, the object of the present invention is to make the span between the tie bars supporting the mold clamping mechanism as short as possible even when obtaining a molded product having a large parison diameter, thereby making the device compact and reducing the installation area. In order to achieve this, a novel conveying mode such as a neck for realizing one cycle of injection stretch blow molding is adopted, and an injection stretch blow molding machine that can easily realize this conveyance is provided.

[Means for Solving the Problems] The present invention has a plurality of sets of neck molds that circulate with respect to a stage for carrying out at least the steps of injection molding, stretch blow molding and molded product release. An injection stretch blow molding machine in which the molded product release stage is provided at a vertically displaced position in the horizontal movement path of the neck mold connecting the stage and the stretch blow stage, and each neck mold of each set is supported. A neck type moving frame, arranged on the injection forming stage and the stretching and blowing stage,
Between the first and second slide rails that slide and guide the neck type moving frame only in the horizontal direction, the same height position of the rails between the first and second slide rails, and the molded product separation A vertically movable third slide rail that vertically moves to the mold stage position and slides and guides the neck mold moving frame only in the horizontal direction, and slidably supported on the first and second slide rails, respectively. First and second frame drive members that are engaged with the neck type moving frame and horizontally move integrally, and are disengaged by the vertical movement of the third slide rails in the upper and lower two stages. It is characterized in that first and second reciprocating driving means for respectively reciprocatingly driving the first and second frame driving members are provided.

[Operation] According to the present invention, by moving and arranging the neck mold for which the previous process has been completed to one of the stages in which the neck mold does not exist, the neck molds of the other sets are for one process only. It can be transferred and one cycle process can be realized.

When carrying out the neck type conveyance, for example, when the first slide rail has a neck type moving frame, the first reciprocating driving means is driven to horizontally move the first frame driving member. Since the first frame drive member and the neck type moving frame are engaged,
The neck type moving frame can be transferred to, for example, the upper third slide rail. Next, when the upper third slide rail is raised, the engagement with the first frame drive member is released,
The neck type moving frame can be set on another stage on the upper side. At this time, if the lower third slide rail is set at the same height as the first and second slide rails, the neck type moving frame supported by the lower third slide rail is the first movable rail. It can be transferred to the first slide rail by engaging with the frame driving member. By repeating such transfer operation, neck-type circulation movement can be realized.

By the above-mentioned transfer operation, one set of neck molds can be linearly moved with respect to the injection molding stage to carry in and out. Therefore, even if the diameter of the parison is increased, the span between the two tie bars can be minimized and the device can be downsized as compared with the rotary transfer method.

Moreover, while realizing the linear movement of the neck die to the injection molding stage, the neck die conveyance path is not looped, and the neck die is vertically displaced in the middle of the path for horizontally moving the neck die between the two stages. The rest of the stage is placed in the same position. Therefore, the installation area can be significantly reduced as compared with the one in which two moving paths having the entire length for one cycle are arranged in parallel as in JP-A-64-40316. In particular, if it has four stages and two of them are vertically arranged, the installation area for substantially three stages will suffice.

[Examples] Hereinafter, examples to which the present invention is applied will be specifically described with reference to the drawings.

<First Embodiment> The apparatus of the first embodiment has four stages as shown in FIG. 10 (A), and an injection molding stage A and a blow molding stage C are respectively provided at the ends of the horizontal movement path a of the neck mold. And a retractable stage B and a molded product release stage (also referred to as an eject stage) D at positions vertically displaced in the middle of the horizontal movement path a of the neck die Can be delivered.

First, the structure of the injection molding stage A will be described with reference to FIGS. 1 and 2.

The neck mold 10 is openably and closably supported by the neck mold moving frame 12 via a neck mold fixing plate (not shown), and four neck molds 10 are fixed to the net mold moving frame 12 to form one set of neck molds. I am configuring. The number of neck types in one set is not limited to this. And this neck type moving frame 1
2 is supported by a first slide rail 14 whose details will be described later, and allows the first slide rail 14 to move up and down by a drive mechanism (not shown).

A core die 20 is disposed above the neck die 10 so as to face it, and the core die 20 is fixed to a die clamping movable plate 24 which is vertically movable with respect to a tie bar 22. Then, the core mold 20 can be moved up and down by driving the mold clamping device 26.

Below the neck mold 10, a cavity mold 30 and a hot runner mold 32 are fixed to a base 34. Then, by driving the mold clamping device 26, the core mold 20 and the neck mold 10 are arranged inside the cavity mold 30, and the inside of the mold is filled with resin by an injection device such as a screw type, so that the parison is formed. 36 is formed.

Next, the retracting stage B and the ejecting stage D will be described with reference to FIG.

In this area, third slide rails (details will be described in detail) 18, 18 'capable of supporting the net type moving frame 12 are provided.
However, they are arranged in upper and lower two stages. The upper third slide rail 18 is vertically movable between a position on the horizontal movement path connecting the injection molding stage A and the blow molding stage C and the retracting stage B above it. On the other hand, the lower third slide rail 18 'is
It can move up and down with the eject stage D below it on the horizontal movement path. In order to drive the third slide rails 18 and 18 'of the upper and lower stages, the base 34 is provided with a rail vertical drive cylinder 40, and the rod 4
0a is fixed to the lower third slide rail 18 '. In addition, the upper and lower third slide rails 18,
A spacer rod 42 is fixed between 18 ', and by driving the rail vertical drive cylinder 40,
The upper and lower third slide rails 18, 18 'integrally move up and down. Furthermore, the third slide rails 18, 1
An eject core 44 is supported between 8 '.
This eject core 44 together with a neck mold opening cam (not shown) opens the neck mold 10 and pushes out the molded product 62 after the third slide rail 18 ′ on the lower stage side is set to the eject stage D. Perform an eject action. Then, in order to drive the fixed plate 44b of the eject core 44, an eject operation cylinder 46 is provided on the upper third slide rail 18.

Next, regarding the details of the blow molding stage C,
It will be described with reference to the drawings.

In the blow molding stage C, the neck mold moving frame 12 of the neck mold 10 is supported by a second slide rail 16 (details of which will be described later). A blow mold 50 is arranged below the neck mold 10, and a blow core 52 and a stretch rod 54 are arranged above the neck mold 10. The blow core 52 is attached to the blow core unit movable frame 26 and can be moved up and down by driving a blow core unit cylinder 58. Further, a stretch rod cylinder 60 is provided in the blow core unit movable frame 56, and the stretch rod 54 can be moved up and down independently of the up and down movement of the blow core 52. Then, after the second slide rail 16, the blow core 52 and the stretch rod 54 are integrally moved downward by a vertical driving cylinder (not shown), the blow core unit cylinder 58 is driven to move the blow core 52 and the stretch rod 54. , The inside of the blow mold 50, and the stretch rod 5 after the blow mold 50 is closed.
By performing the stretching operation and the blowing operation of 4, the hollow molded product 62 expanded in the circumferential direction and the axial direction is obtained.

Although the apparatus of this embodiment has four stages, only three sets, which are smaller than the neck type moving frame 12, are arranged. Then, by moving the neck moving frame 12 that has completed the previous process to the stage where the neck moving frame 12 does not exist, another neck moving frame 12 can be transferred by one step.

Next, the moving mechanism of the neck moving frame 12 will be described with reference to FIG.

The first, second and third slide rails 14, 16 and 18 for horizontally guiding the neck type moving frame 12 are
Each is composed of upper rails 14a, 16a, 18a and lower rails 14b, 16b, 18b. And
As shown in FIG. 3 (C) which is an I-I cross section of FIG. 3 (B), the upper rail 18 a of the third slide rail 18 is
A guide groove 18c is formed between the lower rails 18b. On the other hand, protrusions 12a protruding from the end faces are formed at both ends in the width direction of the neck type moving frame 12, and the protrusions 12a can be inserted into the guide grooves 18c.
The guide grooves 14c and 16 similar to the guide groove 18c are provided.
c is also formed in the first and second slide rails 14 and 16, and when the grooves 14c, 16c and 16c, 18c transfer the neck moving frame 12, the neck moving frame 12 moves from the moving source groove. It is arranged so as to be inserted into the groove of the destination before it is separated. A similar groove 18c 'is also formed in the lower third guide rail 18'. Then, the protrusion 12a and each of the guide grooves 14c, 16c, 18c or 1
By engaging with 8c ', the neck type moving frame 12 is moved and guided only in the horizontal direction and is also used for positioning in the vertical direction. Therefore, each slide rail 14, 16, 1
When 8 or 18 'is moved up and down on each stage, the neck type moving frame 12 moves up and down integrally with each rail 14, 16, 18, 18'.

Next, a delivery mechanism of the neck type moving frame 12 horizontally guided by the slide rails 14, 16, 18, 18 'will be described.

In the first and second slide rails 14 and 16, the frame drive plate 70 guided by the guide grooves 14c and 16c,
70 (corresponding to the first and second frame driving members) is provided. Key portions 70a, 70a are formed on both end sides in the width direction of the frame drive plates 70, 70, as shown in an enlarged view of portion a of FIG. 3 (A). On the other hand, similar key portions 12b are also formed at the four corners of the neck type moving frame 12. Then, as shown in the enlarged view of part a, both key parts 70
Due to the engagement of a and 12b, the neck type moving frame 12 is free in the vertical direction with respect to the frame drive plate 70.
In the horizontal direction, it can move integrally with the frame drive plate 70.

Next, the drive mechanism of the frame drive plates 70, 70 will be described.

First, the drive mechanism of the frame drive plate 70 on the injection molding stage A side will be described with reference to FIG. A link mechanism 72 is provided to drive the drive frame plate 70. This link mechanism 72
First link 7 rotatably supported by a fulcrum 73
2a and the second link 72b. And
One end of the driving side first link 72a is fixed to the rotating shaft 74, and one end of the driven side second link 72b is
It is rotatably supported on a fulcrum 70b of the frame drive plate 70. A rack and pinion mechanism is adopted for driving the rotary shaft 74, and the rack 78 is driven in the horizontal direction by driving the cylinder 76, and a pinion 74a meshing with the rack 78 is fixed to the rotary shaft 74. By adopting such a rack and pinion mechanism, it is possible to drive the link mechanism 72 while maintaining a small space. Then, the first and second links 72a, 7
In the state where 2b overlap each other, the neck type moving frame 12
Is set to the injection stage A, and the first and second
When the links 72a and 72b of the third slide rail 1 are completely extended in a straight line, the neck type moving frame 12 is moved to the third slide rail 1
It will be delivered to 8 or 18 '.

Next, the drive mechanism of the frame drive plate 70 in the blow molding stage C will be described with reference to FIG.

Link mechanism 8 for driving the frame drive plate 70
0 is similarly composed of first and second links 80a and 80b. The only difference from the link mechanism 72 is that the moving stroke of the link mechanism 80 is large. In addition, the driving method of the first link 80a on the driving side is different,
The rotary shaft 82 of the first link 80a is configured as an output shaft of the hydraulic rotary actuator 84. The reason why such a hydraulic rotary actuator 84 is used is that the structure is simpler than that of the rack and pinion mechanism, and that the blow molding stage C has a large space for disposing the drive mechanism.

Next, the operation of the apparatus of the above-described embodiment, in particular, the neck moving frame 1 for performing one cycle process of injection stretch blow molding
The carrying operation No. 2 will be described with reference to FIG.

7 (A) In this state, the injection molding of the parison 36 is completed in the injection molding stage A, the ejecting operation of the molded product 62 is completed in the eject stage D, and the blow molding process is being performed in the blow molding stage C. Has become. Also, only the retractable stage B has the neck type moving frame 1
2 does not exist, and therefore, the neck type moving frame 12 on which the parison 36 is finished can be transported toward the retracting stage B. When carrying out this transfer operation, the third slide rail 18 on the upper stage side is set on the same plane as the first slide rail 14 supporting the neck mold moving frame 12 for which the parison molding has been completed. Neck type moving frame 1
2 will be transferred toward the third slide rail 18 on the upper side of the first slide rail 14. For this purpose, the first link 72a in the link mechanism 72 is
It is rotated by 0 ° and is set to a state in which it is extended in a straight line from the state in which the first and second links a and 72b are overlapped.
At this time, since the key portion 70a of the frame driving plate 70 and the key portion 12b of the neck moving frame 12 are engaged, the link mechanism 72 is driven to drive the neck moving frame 12 via the frame driving plate 70. Is pushed out, is guided by the guide groove 14c of the first slide rail 14, and is set on the third slide rail 18. Further, by adopting the link mechanism 72, the moving speed of the neck type moving frame 12 is the fastest when the first link 72a is rotationally driven in the vicinity of 90 degrees, and when it reaches the 180 degree rotational position. Since the moving speed becomes the slowest, the buffering action can be performed by this drive, and the positioning operation becomes easy.

FIG. 7 (B) In this state, the neck mold moving frame 12 for which parison molding has been completed is set on the third slide rail 18 on the upper stage side, and the blow molding step C has completed the blow molding process. In the blow molding stage C, the neck mold moving frame 12 of the neck mold 10 supporting the molded product 62 is
It is set on the same plane as the third slide rail 18 on the upper stage side.

FIG. 7 (C) In this state, the upper third slide rail 18 that supports the neck moving frame 12 for which parison molding has been completed is set to the retract stage B, and the neck moving frame 12 for which the eject operation has ended is completed. The third slide rail 18 ′ on the lower stage side that supports the first slide rail 14 and the second slide rail 18 ′.
It is set on the same plane as. This setting can be realized by driving the rail vertical drive cylinder 40 to integrally move the upper and lower third slide rails 18 and 18 'upward. At this time, the third slide rail 18 on the upper stage side is engaged with the frame drive plate 70 by the key portions 12b and 70a, but since it is freely movable in the vertical direction, it does not move upward. There is no problem. In addition, the third slide rail 18 'on the lower stage side
However, when it is set to the above position, the frame drive plate 70
The key portions 12b and 70a are engaged with respect to.

FIG. 7 (D) In this state, the neck mold moving frame 12 after the ejecting operation is horizontally moved to the injection molding stage A, and the neck mold moving frame 12 after the blow molding is completed,
It is set on the lower third slide rail 18 '. When the neck type moving frame 12 is ejected, the first link 72a of the link mechanism 72 is moved to one position.
This is realized by rotating the neck mold moving frame 12 after the blow molding is completed, by rotating the first link 80a of the link mechanism 80 by 180 degrees.

FIG. 7 (E) In this state, at the injection molding stage A,
The injection molding process of the parison 36 is started by driving the mold clamping device 26 and the like. On the other hand, the upper and lower third slide rails 18 and 18 'are integrally driven downward, and the upper third slide rail 18 is set on the same plane as the second slide rail 16. Therefore, in this state, the neck type moving frame 12 supporting the parison 36 is
Can be conveyed to the blow molding stage C, and on the other hand, the ejecting operation can be performed on the neck type moving frame 12 supported by the lower third slide rail 18 '.

FIG. 7 (F) In this state, at the injection molding stage A,
The injection molding operation of the parison 36 continues. On the other hand, the eject operation is performed by driving the eject core 44 with respect to the neck type moving frame 12 supported by the third slide rail 18 ′ on the lower stage side set on the eject stage D. further,
The neck type moving frame 12 supporting the parison 36 is transferred to the second slide rail 16 from the upper third slide rail 18. This transfer operation can be realized by rotating the first link 80a in the link mechanism 80 by 180 degrees.

FIG. 7 (G) This state is the same as the state shown in FIG. 7 (A), and shows the state in which the second parison injection molding step is completed. That is, in the injection molding stage A, the neck mold moving frame 12 on which the injection molding of the parison 36 is completed is set on the same plane as the third slide rail 18 on the upper stage side. On the other hand, in the blow molding stage C, the blow molding process is started. Therefore, after that, the neck mold moving frame 12 set on the blow molding stage C is moved to the third slide rail 18 ′ on the lower stage side as shown in FIGS. Set on,
Then, as shown in FIGS. 6E and 6F, by performing the ejecting operation, one cycle of the injection stretch blow molding step can be completed.

<Second Embodiment> This second embodiment device, as shown in FIG.
The evacuation stage in the apparatus of the first embodiment is the temperature control stage B.
Is replaced with.

In order to realize the temperature control operation of the parison 36, in the second embodiment device, the vertical movement mechanism (see FIG. 4) of the upper and lower third slide rails 18 and 18 'in the first embodiment device is used as the eighth embodiment. A device for changing the temperature as shown and realizing the temperature control operation is provided.

In FIG. 8, the third slide rail 18 ′ on the lower stage side is realized by the rail vertical driving cylinder 40, which is the same as the first embodiment device. The differences are as follows.

That is, the guide shaft 90 faces vertically upward from the base 34.
There is provided a spacer 92 in which the guide shaft 90 is inserted, and the lower end side of the guide shaft 90 is fixed to the lower third slide rail 18 '. The upper end of the spacer 92 is fixed to a heating pot fixing plate 96 that supports the heating pot 94 for heating the parison 36. On the other hand, the third slide rail 18 on the upper stage side is movably suspended from a top plate 98 fixed to the upper end of the guide shaft 90. That is, there is provided a stopper shaft 102 which is inserted into a hole 98 a provided in the top plate 98 and whose lower end side is fixed to the third slide rail 18 on the upper stage side.
A flange 100 having an outer diameter larger than the hole diameter of the hole 98a is fixed to the upper end side of 2. Therefore, in the third slide rail 18 on the upper stage side, the flange 100 has the top plate 9
The lower limit position is regulated at the position where it comes into contact with 8, and vertical movement is possible only above it. A heating core 104 is arranged on the top plate 98 at a position substantially facing the heating pot 94. The heating operation of the parison 36 is performed by sandwiching the neck mold 10 between the heating core 104 and the heating pot 94. This drive is realized by driving the lower third slide rail 18 'by the rail vertical drive cylinder 40. That is, when the lower third slide rail 18 'is raised, the heating pot fixing plate 96 is also integrally raised. And this heating pot 9
In the middle of the ascending path of 6, the heating pot 94 comes into contact with the neck mold 10 and further raises the heating pot fixing plate 96, whereby the heating pot 94 causes the neck mold 10, the neck mold moving frame 12, and the third stage on the upper stage side. The slide rail 18 is integrally pushed up and moved up to the set position of the heating core 104.

On the other hand, the eject operation cylinder 46 for driving the eject core 44 is supported by fixing its rod 46a to the third slide rail 18 'on the lower stage side. The main body of the cylinder 46, which is a movable portion, is connected to a fixed plate 44b to which the neck-type opening cam 44a is fixed. Therefore, by vertically moving the body of the cylinder 46, the ejector 44 and the neck-type opening cam 44a can be driven through the fixing plate 44b.

The transfer operation of the neck moving frame 12 in the apparatus having such a temperature control stage B is as shown in FIG. The operation of each process shown in FIG. 9 is different from that of FIG. 7 in that the temperature adjustment operation of the parison 36 is performed in the temperature adjustment stage B and the vertical movement drive of the upper third slide rail 18 is performed in the lower step. Side slide rail 18 'is not integrally performed, but is raised through the heating pot 96 at a certain rising point of the lower third slide rail 18', and the upper third slide rail 18 'is raised. The lower limit position of the slide rail 18 is restricted to a predetermined position by the flange 100 and the stopper shaft 102. By performing such driving, the upper and lower third slide rails 18, 18 '
In addition, a space is secured in which a heating pot 94 can be placed in addition to the eject core 44.

As described above, according to the apparatus of the second embodiment, all of the four stages are the execution process stages necessary for injection stretch blow molding, but the temperature adjustment stage B and the eject stage D are
By arranging them vertically, it is possible to implement the above-mentioned four steps substantially in an installation space for three steps.

The present invention is not limited to the above embodiments,
Various modifications can be made within the scope of the present invention.

When the present invention is applied to an injection stretch blow molding machine,
Instead of the second embodiment, the embodiment shown in FIG. 10 (C) can also be used.

FIG. 7C shows a case where only the eject stage B is provided at a position displaced in the vertical direction in the middle of the horizontal movement path a connecting the injection molding stage A and the blow molding stage C. In this case, two sets of the neck type moving frame 12 are provided.

[Effects of the Invention] As described above, according to the present invention, the molded product release stage is arranged at a vertically offset position in the middle of the horizontal movement path of the neck die connecting the injection forming stage and the stretch blow molding stage. However, by moving and arranging the neck mold whose previous process has been completed on the stage where the neck mold does not exist, it is possible to realize a novel transfer system capable of transferring another neck mold by one process. In realizing this conveyance, the neck type moving frame on the first and second slide rails is reciprocally driven by the first and second reciprocating driving means via the first and second frame driving members. , And it can be transferred to the upper and lower third slide rails in the center thereof, and the vertical movement of the third slide rail causes the engagement between the neck type moving frame and the first and second frame drive members. It can be automatically released and the neck type moving frame can be transferred to another stage. Therefore, it is possible to easily configure the neck-type transfer driving means.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a first embodiment device in which the present invention is applied to an injection stretch blow molding machine, and FIGS. 2 (A) and 2 (B) are schematic cross-sectional views and vertical cross-sections of a parison injection molding device. FIGS. 3 (A), 3 (B), and 3 (C) are a schematic plan view, a front view, and FIG. 3 (B) of the horizontal movement mechanism of the neck type moving frame, respectively.
4A and 4B are schematic front views and side views of the vertical moving mechanism of the neck type moving frame, and FIG. 5 is a link mechanism driving on the injection molding stage side. 6 is a schematic cross-sectional view of the link mechanism drive unit on the blow molding stage side, and FIGS. 7A to 7G are explanatory views of respective process operations in the apparatus of the first embodiment. FIG. 8 is a schematic cross-sectional view of a vertical movement mechanism of a neck type moving frame in the apparatus of the second embodiment of the present invention, and FIGS. 9A to 9G are diagrams of the apparatus of the second embodiment. FIGS. 10A to 10C are schematic explanatory views for explaining the operation of each process, and are schematic explanatory views showing various aspects of the injection stretch blow molding machine to which the present invention is applied. 10 ... Neck type, 12 ... Neck type moving frame, 14 ... First slide rail, 16 ... Second slide rail, 18 ... Third slide rail, 36 ... Parison, 62 ... Molding Articles, 70, 70 ... First and second frame driving members, 72, -78 ... First reciprocating driving means, 80-84 ... Second reciprocating driving means, A ... Injection molding stage, B …… Evacuation stage (or temperature control stage), C …… Blow molding stage, D …… Molded product release stage, a …… Horizontal movement path, b …… Vertical movement path.

Claims (2)

[Claims] 1. A neck having a plurality of sets of neck dies that circulate with respect to a stage for carrying out at least the steps of injection molding, stretch blow molding, and mold release, and the neck connecting the injection molding stage and the stretch blow stage. An injection stretch blow molding machine in which the molded product release stage is provided at a position displaced in the vertical direction in the middle of a horizontal movement path of a mold, the neck mold moving frame supporting each neck mold of each set, and the injection molding. It is arranged on the stage and the stretch blowing stage,
Between the first and second slide rails that slide and guide the neck type moving frame only in the horizontal direction, the same height position of the rails between the first and second slide rails, and the molded product separation A vertically movable third slide rail that vertically moves to the mold stage position and slides and guides the neck mold moving frame only in the horizontal direction, and slidably supported on the first and second slide rails, respectively. First and second frame drive members that are engaged with the neck type moving frame and horizontally move integrally, and are disengaged by the vertical movement of the third slide rails in the upper and lower two stages. An injection stretch blow molding machine, comprising: first and second reciprocating drive means for reciprocally driving the first and second frame driving members, respectively. 2. The first and second reciprocating driving means according to claim 1, wherein one end of the driving link and the driven link are rotatably connected, and the other end of the driven link is the frame. An injection stretch blow molding machine configured to be rotatably connected to a drive member and rotationally drive the other end of the drive link.