TWI492836B - Blow molding machine - Google Patents

Description

Blow molding machine

The present invention relates to a blow molding machine that can be used by switching between a part of an extension blow molding machine and an injection blow molding machine by replacing parts.

The injection stretch blow molding machine (also referred to as a biaxial stretch blow molding machine) shoots a preform, and the preform is extended by a rod and a blown air (hereinafter referred to as a blow). (blow air) is formed to extend in the direction of the biaxial (horizontal axis and vertical axis) (Patent Documents 1 and 2). The injection stretch blow molding machine is suitable for forming a container for the following materials: a material which is easy to maintain a suitable temperature and a good elongation property in a forming process, for example, PET (polyethylene terephthalate: polyethylene terephthalate) Ester) is the formation of a container of material. However, the injection stretch blow molding machine is not suitable for forming containers of the following materials: crystallization speed such as PE (polyethylene: polyethylene) or PP (polypropylene: polypropylene) is faster than PET, and it is easy to become an extension in the forming process. A container of material that is below the proper temperature and that exhibits poor properties. When manufacturing a thin container made of PE or PP, it becomes more difficult depending on the formation of the injection stretch blow.

Further, in the injection/extension blow molding machine of Patent Document 1, a heating (temperature-adjusting) stage is mounted. Heating (warming) the stage has the following great advantages: it can produce the preform after injection molding. Poor heat history can be appropriately or partially heated to form a bottle of complicated shape. However, in a small container made of PET which does not require such a vertical axis extension, for example, an eye drop container or the like, the heat of the stage is reduced (heat adjustment), and the heat retention of the preform is reduced, and the corner portion of the container cannot be produced. The shape of the situation.

Therefore, when a material such as PE or PP or a small container in which the vertical axis is not required to be stretched even in PET is used, it can be said that the injection blow molding machine is more suitable. The injection blow molding machine shoots the shaped preform, and the preform is transported from the injection forming station to the blow molding station by an injection core. In the blow molding station, the preform is molded only by extending the preform from the blown core mold toward the uniaxial (horizontal axis) direction (Patent Document 3).

Even in the case of containing a different material and forming a small number of batches, in the past, only the injection stretch blow molding machine and the injection blow molding machine were used separately.

(Patent Document 1) Japanese Patent Publication No. Sho 53-22096

(Patent Document 2) Japanese Patent Publication No. 05-77311

(Patent Document 3) Japanese Patent Laid-Open No. 48-44355

When using two blow molding machines with different blow molding methods to form a small number of containers, the cost of the two blow molding machines will be reflected in The price of the container, so there is a limit to reducing the cost of the container. The installation area of the factory equipped with two blow molding machines will also be widened, and the maintenance cost of the two blow molding machines will also be reflected in the price of the container. Moreover, when two blow molding machines are used separately in a small number of small-scale productions, the operation rate of each one of the blow molding machines is also lowered and not efficient.

In some aspects of the present invention, a versatile blow molding machine is provided which can be used by switching between a part of an injection stretch blow molding machine and an injection blow molding machine by replacing parts.

According to still another aspect of the present invention, there is provided a blow molding machine which can prevent deformation of a rotary disk and cause a rotation failure even if it is used for switching to both the extension blow molding machine and the injection blow molding machine.

An aspect of the present invention relates to a blow molding machine having: a lower base; and an upper base that is movable up and down over the lower base; and a rotating disk that is rotatably Supporting the upper base and stopping a plurality of transfer members at a plurality of rotation stop positions; and a plurality of processing stations, the space between the lower base and the upper base being disposed in the plurality of spaces a rotation stop position, wherein the plurality of processing stations include at least an injection molding station having an injection mold and a blow molding station having a blow mold, and the plurality of transfer members, the injection mold, and the front portion are replaced by replacement A blow molding machine for blowing a molded part, which can be used for both the extension blow molding machine and the injection blow molding machine, characterized in that the injection molding station has a lower cylinder which is supported by The lower base, and the upper base is lifted and driven; and an upper cylinder supported by the upper base and lifted and driven to close the mold, when the blow molding machine is used to project the stretch blow molding machine, Each of the plurality of transfer members includes a first neck mold, and the upper base, the rotating disk, and the closed mold disk are lowered by the lower cylinder at the injection molding station, and are fixed after being lowered. The first injection core mold of the mold closing disk is further lowered by the upper cylinder, and the first neck mold and the first injection core mold are closed to the first injection supported on the lower base side. a cavity mold for molding a first preform, wherein when the blow molding machine is used for an injection blow molding machine, each of the plurality of transfer members includes a transfer die unit having a second neck mold and a second shot core mold , In the injection molding station, the upper base, the rotating disk, and the closed mold disk are lowered by the lower cylinder, and the pressure receiving block fixed to the lowered closed mold disk is further provided by the upper cylinder Further, the transfer mold unit is directly pressed, and the transfer mold unit is closed to the second injection cavity mold supported on the lower base side to form the second preform.

According to one aspect of the present invention, a lower base, an upper base, a rotating disk and a plurality of processing stations of a blow molding machine are also used for injection and extension blowing. Both the forming machine and the injection blow molding machine. In order to perform the blow molding of the two types, at least an injection molding station and a blow molding station are provided, and only a part including a plurality of transfer members supported by the rotary disk and a mold disposed in each station may be replaced. Part replacement is a work that is usually performed for the specifications of each of the formed containers. In the aspect of the present invention, in fact, the change of the type of the blow molding machine can be performed by the replacement of the parts.

Even in the conveyance of the preform or the container, a plurality of transfer members that are rotationally conveyed by the rotary disk are used, and two types of blow molding are common. In the injection stretch blow molding machine, the transfer member includes a first neck mold, and the preform is carried by the first neck mold. In the injection stretch blow molding, the first shot core mold may be lifted and lowered only at the injection molding station. In the injection blow molding, the transfer member has a transfer die unit of the second neck mold and the second shot core mold. If the transfer mold unit is carried by the rotary disk, the blow molding can be supplied to the preform from the second injection core mold at the blow molding station.

Here, the upper cylinder is used to lift and close the first injection core mold in the injection stretch blow molding machine, and to use the transfer mold including the second injection core mold, the upper base, and the rotary disk. Injection blow molding machines that are lifted together are generally not required. In the injection blow molding machine, the upper cylinder is not used, and the lower cylinder pulls the upper base, and the mold closing operation of the transfer mold unit can be performed by the upper base passing through the rotary disk. However, as a result, a mold closing force acts on the rotating disk between the upper base and the transfer die unit to deform the rotating disk. The deformation of the rotating disk will become an obstacle when the upper base is rotationally driven, and an abnormal sound or Poor rotation.

In one aspect of the present invention, since the pressure-receiving block is fixed to the mold-closing disk driven by the lower cylinder, and the pressure-bearing block directly presses the transfer mold unit, the upper base or the rotary disk is not fastened. It is possible to prevent a defect caused by the rotation of the deformation of the rotary disk.

In one aspect of the invention, the inner diameters of the cylinders of the lower cylinder and the upper cylinder may be substantially the same, and may be set to the same pressure when the mold is closed.

When the lower cylinder and the upper cylinder are set to the same pressure, if the inner diameters of the two cylinders are substantially the same, the force of the lower cylinder can be offset from the reaction force of the upper cylinder, and the clamping force is only the force of the upper cylinder. . In the injection blow molding machine, a pressure receiving block is fixed to a mold closing disk driven by an upper cylinder, and the pressure receiving block directly presses the transfer mold unit. Therefore, the mold closing force does not act on the upper base or the rotating disk when the mold is closed, and deformation of the rotary disk can be prevented. In the injection stretch blow molding machine, since the first injection core mold is fixed to the mold closing disk driven by the upper cylinder, the mold closing force does not act on the upper base or the rotary disk at the time of mold closing.

In one aspect of the invention, a stopper rod extending from the lower base to the upper portion may be further provided, and the upper base is abutted against the plug rod and closed when the mold is closed. Position support.

The upper base that is pressed by the lower cylinder is balanced by the reaction force of the upper cylinder when the mold is closed, and the pressing force can be released. At this time, the upper base is in contact with the plug rod and is supported at the mold closing position. Therefore, the height position of the upper base when the mold is closed can be determined unambiguously and will not The rotating disk is deformed by pressing the rotating disk by the weight of the upper base or the like.

In one aspect of the invention, there is provided a spacer member interposed between the upper base and the plug rod when the mold is closed, and adjusting the mold closing position of the upper base.

The interval between the upper base and the lower base at the time of mold closing may be different depending on the difference in height dimension of the first injection core mold and the transfer mold unit or the length of the molded article. The interval between the upper base and the lower base at the time of mold closing can be easily adjusted by changing the thickness of the spacer member or the thickness of the spacer member and changing the mold closing position of the upper base.

In one aspect of the invention, the first gap may be provided between the pressure receiving block and the opposing surface of the upper base during the mold closing.

The pressure-bearing block is stopped at a position close to the transfer mold unit after the mold is closed, and the closed mold position of the upper base determined by the plug rod is adjusted without being affected by the pressure block, thereby being able to be in the pressure block The first gap is ensured between the opposing faces of the upper base. Thereby, it is ensured that the pressure from the pressure receiving block does not act on the upper base, and the upper base can be prevented from deforming the rotating disk.

In one aspect of the invention, a second gap may be provided between the upper base and the opposing surface of the rotary disk during the mold closing.

The upper base and the opposite faces of the rotary disk are designed to ensure a gap during the rotation of the rotary disk. Since the force of the pressure block is not transmitted to the upper base, and the upper base can support its own weight by the plug rod, the same clearance as that during the rotary conveyance can be ensured between the opposite faces of the upper base and the rotary disk. .

In one aspect of the invention, the first neck mold system can be split by a pair The mold is configured such that the pair of split molds are openably and closably supported along two L-shaped guides fixed to the rotary disk, and the transfer mold unit includes a hole through which the flange sleeve can be inserted. The flanged sleeve includes an apertured flange and a hollow shaft portion extending from the aperture flange, and the length of the hollow shaft portion is longer than the hole and is inserted into the flanged sleeve. The bolt is fastened to the rotating disk, whereby the transfer die unit can be locked and coupled between the flange and the rotating disk while securing a certain third gap between the transfer die unit and the rotating disk. .

Since the first neck mold is supported by the rotary disk in an openable and closable structure, the rotary disk having a relatively low rigidity is not deformed. On the other hand, the transfer die unit can be bolted to the rotary disk. As described above, when the transfer mold unit is bolted to the rotary disk, the rotary disk having weak rigidity is deformed by the fastening. The flange sleeve is attached between the transfer mold unit and the rotary disk while securing a certain third gap, and the transfer mold unit is locked and coupled between the flange and the rotary disk. Therefore, only the locking coupling force acting on the flange area acts on the rotating disk, the load on the rotating disk becomes small, and the deformation of the rotating disk can be suppressed. Further, it is easy to secure the third gap between the opposing faces of the rotating disk and the upper base.

In one aspect of the present invention, when the blow molding machine is used in an injection blow molding machine, a rotary joint is provided, and the transfer mold unit includes a passage, and is provided with: a joint connected to the rotary joint And the first pipe and the second pipe of the transfer mold unit, wherein the first pipe is supplied to the passage The fluid, the second pipe is configured to discharge the fluid from the passage, the rotary joint has a fixed shaft body, and a casing disposed around the fixed shaft body and fixed to the rotating disk, the fixed shaft The body includes: a plurality of ring grooves formed on the outer surface; and a first longitudinal hole communicating with one of the plurality of ring grooves; and a second longitudinal direction communicating with the other ring groove of the plurality of ring grooves a hole having a first opening and a second opening, wherein the first opening is connectable to the first pipe and faces the one of the plurality of ring grooves, the second opening The opening portion is connectable to the second pipe, and faces the other ring groove of the plurality of ring grooves.

In this way, the transfer die unit that is rotationally driven together with the rotary disk can transmit the fluid, for example, by warming the medium or blowing air, through the rotary joint. In particular, since the casing that transfers the die unit and the first and second pipes is rotated together with the rotating disk, the relative positional relationship between the casing and the transfer die unit is constant. Therefore, the first and second pipes are not twisted and broken by the rotation of the rotating disk. Further, the blow molding machine having the rotary joint is not a combined machine, and can be applied to a special machine as an injection blow molding machine.

In one aspect of the invention, the pipe supporting member for supporting the first pipe and the second pipe may be further provided, and the pipe supporting member is raised and lowered together with the rotating disk and the rotary joint.

In this way, it is not necessary to lengthen the connection of the rotary joint and the external piping. Ground winding.

Another aspect of the present invention is a blow molding machine having: a lower base; and an upper base that is movable up and down over the lower base; and a rotating disk that is rotatably Supporting the upper base, and stopping a plurality of transfer members at a plurality of rotation stop positions; and a plurality of processing stations, the space between the lower base and the upper base being disposed in the plurality of spaces a rotation stopping position; and a longitudinal closing mechanism for lifting and lowering the upper base, wherein the plurality of processing stations include at least an injection molding station having an injection mold and a blow molding station having a blowing mold, which is replaced by a replacement The plurality of transfer members, the injection mold, and the parts of the blow mold can be used for both the injection stretch blow molding machine and the injection blow molding machine, and the blow molding machine is used for the above-described injection stretch blow molding. In the case of the machine, each of the plurality of transfer members includes a first neck mold, and the first injection mold and the first injection cavity mold that are closed by the first neck mold are used in the injection molding station. Forming the first preform, the first preform is held by the first neck mold, and conveyed to the blow molding station by the rotation conveyance of the rotary disk, and is extended by the blow molding station The longitudinal axis drive of the rod and the blowing from the blow core mold extend the biaxial direction of the first preform disposed in the first blow cavity mold closed by the first neck mold to form a shape First container, When the blow molding machine is used in the injection blow molding machine, each of the plurality of transfer members includes a transfer die unit having a second neck mold and a second shot core mold, and is used in the injection molding station and the transfer. The second injection mold of the mold unit is closed to form the second preform, and the second preform is held by the transfer mold unit and transported to the blow molding station by the rotary conveyance of the rotary disk, and In the blowing forming station, the second preform disposed in the second blowing cavity mold that is closed with the transfer mold unit is stretched and blown by blowing from the second injection core mold The second container is formed.

Even in another aspect of the present invention, as in one aspect of the present invention, as long as the mold or the like is replaced, the lower base of the one blow molding machine, the upper base, the rotary disk, and the plurality of processing stations It can be used for both the injection stretch blow molding machine and the injection blow molding machine. In addition, in the shape of the first container blown by the injection stretch blow molding machine, the first injection cavity can be placed in the injection molding station, and the first blow cavity mold can be placed in the blow molding station. , blown mandrel and extension rod. In the case of the injection blow molding machine, the second blowing cavity mold can be disposed in place of the first blowing cavity mold in accordance with the shape of the second container to be blown, and the blowing core mold is not used. And extension rods.

In another aspect of the present invention, the rotating disk is intermittently rotatable at a rotation angle of 180 degrees, and the plurality of processing stations have first and second stations arranged along a rotational transport direction, and the first The station serves as the injection molding station, and the second station can be used as both the blowing station and the take-out station.

According to this configuration, the blow molding machine can be constructed only by the injection molding station which is indispensable in the injection stretch blow molding machine and the injection blow molding machine, and the two stations of the blow molding station.

In another aspect of the present invention, the rotating disk system may be intermittently driven to rotate at a rotation angle of 90 degrees, and the plurality of processing stations are constituted by first to fourth stations arranged along a rotation conveyance direction. When the blow molding machine is used in the above-described injection stretch blow molding machine, the first station serves as the injection molding station, the second station serves as a preform temperature adjustment station, and the third station serves as the blow molding station. The fourth station serves as a take-out station. When the blow molding machine is used in the injection blow molding machine, the first station serves as the injection molding station, and the second station serves as the blow molding station, and the third station becomes At the take-out station, the fourth station is a cooling station that cools the second shot core mold.

When constructed in this way, the preform having the heat during injection molding can be re-adjusted to a temperature or temperature distribution suitable for blow molding by the temperature-and-temperature distribution of the injection-molding blow molding machine, and the blow molding quality can be improved. . Moreover, by separately providing the take-out station and the blow molding station, it is not necessary to drop the formed container at the take-out station, regardless of whether it is an injection stretch blow molding machine or an injection blow molding machine. A special take-up device that carries the container in the horizontal direction. Further, in the injection blow molding machine, the second shot core mold exposed after the container is taken out can be cooled. Therefore, in the second shot core mold, it is not necessary to internally pass the temperature medium. In the case where the second container that is blown and blown into a shape is a narrow-mouth container, the core pin of the second injection core mold can be formed by a solid rod having no temperature-adjusting medium passage, and can The core pin diameter is formed to be as thin as, for example, 8 mm or less and coincides with the pore diameter of the narrow mouth container.

In another aspect of the present invention, the rotating disk system may be intermittently rotationally driven at a rotation angle of 90 degrees or 180 degrees, and the plurality of processing stations are provided by the first to fourth stations arranged along the rotation conveyance direction. In the above-described injection molding machine, the first station is the injection molding station, the second station is a preform temperature adjustment station, and the third station is formed into the blow molding machine. At the station, the fourth station serves as a take-out station. When the blow molding machine is used in the injection blow molding machine, the first station serves as the injection molding station, and the third station can serve as the blow molding station and take out the same. The station is used, and the rotating disk is not stopped at the second station and the fourth station.

When it is configured in this way, by having four stations in the injection stretch blow molding machine, the blow molding quality can be improved as described above, and on the other hand, the parts can be reduced by the injection blow molding machine in two stations. Count to reduce manufacturing costs.

In another aspect of the present invention, the rotating disk system may be intermittently rotationally driven at a rotation angle of 120 degrees, and the plurality of processing stations are constituted by first to third stations arranged along a rotation conveyance direction. When the blow molding machine is used in the above-described injection stretch blow molding machine, the first station serves as the injection molding station, the second station serves as the blow molding station, and the third station serves as a take-out station, and the blowing is performed. When the molding machine is used in the above-described injection molding machine, the first station serves as the injection molding station, the second station serves as the blowing station, and the third station serves as a take-out station.

In such a configuration, by separately providing the take-out station and the blow molding station, the injection stretch blow molding machine or the injection blow molding machine can be used as long as the container is not dropped at the take-out station, and There is no need for a special take-up device that carries the container out in the horizontal direction.

In another aspect of the present invention, the blow molding mechanism for laterally closing the blow mold in the blow molding station can be used in the above-described injection stretch blow molding machine and the aforementioned injection blow molding machine. .

In the injection stretch blow molding machine and the injection blow molding machine, as long as the position of the blow molding station is not changed, the blow mold closing mechanism can be fixed to the machine side and used for both models.

1. Type of blow molding machine

The two-station, three-station, and four-station rotary conveyance type blow molding machines according to the present invention are shown in Figs. 1 to 4 . Figs. 1 to 4 schematically show the processing stations 1A to 4D which are disposed at a plurality of rotation stop positions at a predetermined rotation angle of the rotary disk 20. One of the blow molding machines of Figs. 1 to 4 can be used as both the injection stretch blow molding machine STR and the injection blow molding machine INJ.

The rotary disk 20 has openings 21 to 24 which permit passage of parts arranged to the processing station or prevent interference with the parts. Figure 1 shows the 2-station type. Figure 2 shows the 3-station type. Figures 3 and 4 show the four-station type. Further, the rotary disk 20 for the two-station type of Fig. 2 does not require the opening 22 at two locations indicated by broken lines. 24, however, it is also possible to have openings 22 and 24 for use in combination with the station type of Figs. 3 and 4. However, when the rotating disk 20 dedicated to the second station of Fig. 1 is used, the radius of the rotating disk 20 can be minimized. The radii of the rotating disks 20 of the two stations, three stations, and four stations are set to D1, D2, and D3, respectively. When two, three, and four stations are respectively set to the dedicated rotating disk 20, D1 < D2 < D3. This is because the smaller the number of stations, the less interference is placed even if adjacent stations are placed close to each other. On the other hand, when two stations, three stations, and four stations are respectively set as the shared rotating disk 20, D1 = D2 = D3.

In the two-station type shown in Fig. 1, two processing stations disposed at two rotation stop positions of the rotation angle of the rotary disk 20 at a rotation angle of 180 degrees are the injection molding station (first station) 1A and the blow molding station. (2nd station) 2A. Even in the case where the blow molding machine is used to eject one of the extension blow molding machine STR or the injection blow molding machine INJ, the forming preform can be ejected at the injection molding station 1A, and the blow molding station 2A will be The preform is blown into a container. The blow molding station 2A is also used as a take-out station for taking out a container from a molding machine.

In the three-station type shown in FIG. 2, three processing stations arranged at three rotation stop positions of a rotation angle of 120 degrees of the rotary disk 20 are injection molding stations (first station) 1B and a blow molding station. (2nd station) 2B, and take-out station (3rd station) 3B. Unlike the first drawing, the take-out station 3B is disposed separately from the blow molding station 2B. In the case where the blow molding machine is used as the injection blow molding machine INJ, the third station 3B of Fig. 3 can also be used as a cooling station for emitting the core mold exposed after the container is taken out.

In the four-station type shown in Fig. 3, the system is provided with a rotating disk. 4 processing stations 1C to 4C of 4 rotation stop positions of a rotation angle of 90 degrees of 20. When the blow molding machine is used as the injection stretch blow molding machine STR, all of the first to fourth stations 1C to 4C are used. In this case, the first station is an injection molding station, the second station 2C is a temperature adjustment station, the third station 3C is a blow molding station, and the fourth station is a take-out station. On the other hand, when the blow molding machine is used as the injection blow molding machine INJ, the first and third stations 1C and 3C are used, and the first station 1C serves as an injection molding station, and the third station becomes a blow molding station. . In this case, the 2nd and 4th stations are not used. Therefore, when the blow molding machine is used as the injection blow molding machine INJ, as in the first drawing, the rotary disk 20 may be stopped at two stop positions of a rotation angle of 180 degrees.

In the four-station type shown in Fig. 4, unlike the third figure, even when the blow molding machine is used to eject one of the extension blow molding machine STR or the injection blow molding machine INJ, it is used. All of the 1st to 4th stations 1C to 4C. When the blow molding machine is used as the injection stretch blow molding machine STR, the first to fourth stations 1D to 4D are the same as the first to fourth stations 1C to 4C of Fig. 3 . When the blow molding machine is used as the injection blow molding machine INJ, the first station 1D serves as an injection molding station, the second station 2D becomes a blow molding station, the third station 3D becomes a take-out station, and the fourth station 4D becomes an injection core mold. Cooling station.

Thus, the present invention uses a blow molding machine as both an injection stretch blow molding machine STR and an injection blow molding machine INJ, thereby reducing the forming cost of a multi-species small-volume production container.

2. 4-station/2-station switching type blow molding machine 2.1. 4-station injection extension blow molding machine

First, Japanese Patent No. 3722671, which is a four-station blow molding machine shown in Fig. 3, will be described with reference to Figs. 5 to 7 as an injection stretch blow molding machine.

As shown in FIGS. 6 and 7, the four-station injection stretch blow molding machine 50 has a machine table 52, a lower base 54, an upper base 56, a traction plate 58 and a cylinder fixing plate 60, and an upper base. The seat 56, the traction plate 58 and the cylinder fixing plate 60 are connected and fixed by a plurality of, for example, four tie bars 62 (see FIG. 5) penetrating the lower base 54.

The machine table 52 has a box shape in which an internal cavity is formed, and the injection device 64 is attached to one of the upper sides thereof. The lower base 54 is in a state of being fixed to the upper side of the other side of the machine base 52. The upper base 56 is disposed above the lower base 54 at a predetermined interval from the lower base 54, and rotatably supports the rotary disk 66 (the rotary disk 20 of FIG. 3) on the lower surface side.

In addition, the upper base 56 is in a state in which the two tie rods 62 are fixed to the middle of the injection device 64 and the upper ends of the two tie bars 62 on the opposite side of the injection device 64.

Then, a plurality of processing stations 1C to 4C shown in FIG. 3 are disposed in a space between the lower base 54 and the upper base 56 on the table 52 and at a plurality of rotation stop positions of the rotary disk 66. As shown in Fig. 5, an injection molding station 68 (corresponding to 1C of Fig. 3) is provided on the side of the injection device 64, and a blow molding station 70 is provided at the opposite position (corresponding to the third 3C) is provided with a temperature adjustment station 72 (corresponding to 2C of FIG. 3) and a take-out station 74 (corresponding to 4C of FIG. 3) at a position intersecting the injection molding station 68 and the blow molding station 70 by 90 degrees. .

As shown in Fig. 6, in the injection molding station 68, the injection cavity mold (first injection cavity mold) 78 is mounted by a hot runner die 76 that performs nozzle contact with the injection device 64. On the lower base 54.

Similarly, as shown in Fig. 6, in the blow molding station 70, a blow cavity mold composed of a split mold which can be closed by a blow mold closing mechanism 82 including a blow mold mold closing cylinder 80 is used. The 1 blow cavity mold 84 is disposed on the lower base 54.

As shown in Fig. 7, in the temperature adjustment station 72, a temperature pot 86 is fixed to the lower base 54.

As shown in Fig. 7, in the take-out station 74, a shooter 88 for taking out a molded article is attached to the lower base 54 (omitted in Fig. 6).

Further, on the lower surface of the rotary disk 66, the positions of the respective stations of the injection molding station 68, the temperature adjustment station 72, the blow molding station 70, and the take-out station 74 are provided, and a plurality of, for example, two neck molds are respectively disposed. 1 neck mold) 90.

The neck mold 90 is composed of a split mold, and the split molds are respectively attached to the neck mold support plate 92 composed of the split plate, and the neck mold 90 can be opened and closed by opening and closing the neck mold support plate 92. In the injection stretch blow molding machine 50, the neck mold 90 and the neck mold support plate 92 capable of opening and closing the neck mold 90 are configured to constitute a transfer member held by the rotary disk 66.

Further, the rotary disk 66 can be intermittently rotated by 90 degrees by the electric motor 94 provided on the upper base 56, and the neck mold 90 can be sequentially transported to the injection molding station 68, the temperature adjustment station 72, and the blower. Forming station 70, take-out station 74.

Further, although the rotation stop position of the rotary disk 66 can be positioned by the positioning mechanism 96, it can be performed only by the positioning means of the servo motor.

Further, the upper base 56 is provided with a temperature-adjusting core mold lifting cylinder 98 for lifting and lowering a temperature-adjusting core mold (not shown) at a corresponding position of the temperature-modulating station 72; and blowing the core mold lifting cylinder 102, The lifting core mold 100 is raised and lowered at a corresponding position of the blow molding station 70; and the extension rod lifting cylinder 106 is configured to lift and lower the extension rod 104; and an eject cam elevating cylinder 110 is taken out. The corresponding position of the station 74 is used to open and lower the eject cam 108 that opens the neck mold support plate 92.

The cylinder fixing plate 60 is fixed above the upper base 56 and located at the upper ends of the two tie bars 62 on the side of the injection molding station 68, and between the cylinder fixing plate 60 and the upper base 56, along two The tie rod 62 is capable of lifting and lowering an injection core mold closing template (broadly, a closed mold disk) 114 to which the injection core mold 112 is mounted. Further, although there is a coolant circulation in the injection core mold 112, the circulation device relating to the coolant is omitted.

Further, the cylinder fixing plate 60 is provided with an injection core mold closed mold cylinder (in a broad sense, an upper cylinder) 116, and the front end of the piston 118 of the injection core mold closed mold cylinder 116 is coupled to the injection core mold closing template. 114.

The traction plate 58 is attached to the machine base 52 and is fixedly connected to the four tie rods 62. Lower end. In the traction plate 58, a neck mold closed cylinder (generally a lower cylinder) 120 as a longitudinal mold closing means is attached below the injection molding station 68, and the piston 122 of the neck mold closed cylinder 120 is attached. Connected to the underside of the lower base 54. Further, the longitudinal closing mechanism of the upper base 56 is constituted by a traction plate 58, a tie rod 62, and a cylinder 120.

Therefore, as shown in Fig. 7, when the neck mold closed cylinder 120 is driven while the traction plate 58 is raised, the tie rod 62 is pulled and lowered as the traction plate 58 is lowered, and the joint is fixed to The upper base 56 of the tie rod 62, as shown in Fig. 6, will have a stroke L1 amount, and the neck mold 90 attached to the rotary disk 66 will descend, for example, at the injection molding station 68, the neck mold 90. The injection concave portion 78 is closed.

Further, on the side of the blow molding station 70, the lower surface of the upper base 56 abuts against the stopper 138 provided at the upper portion of the blow mold closing mechanism 82, and is positioned at the lower limit position of the upper base 56.

Moreover, in the temperature adjustment station 72 and the blow molding station 70, the blow cavity mold 84 can mold the neck mold 90 by the temperature adjustment tank 86 and the blow mold closing mechanism 82.

When the upper base 56 is lowered, the cylinder fixing plate 60 fixed to the upper end of the two tie rods 62 on the side of the injection molding station 68 is also in a state of being lowered by the same stroke L1 as the upper base 56.

In this state, in the injection molding station 68, the injection core mold closing die 114 is driven to lower the stroke L2 by the driving of the core mold closing cylinder 116, whereby the injection core mold 112 and the neck mold 90 are closed. And the molten resin is ejected from the injection device 64 into the injection cavity mold 78 to eject the shaped preform. (first preform) 124.

In this case, since the core mold closed cylinder 116 is integrally lowered as the upper base 56 is lowered, the distance from the upper base 56 can always be kept constant.

Therefore, the lowering stroke L2 of the injection core mold closed cylinder 116 is completed by the minimum stroke from the position where the injection core mold 112 is retracted from the rotary disk 66 to the mold closing position, so that the injection mold closed cylinder can be shortened. The length of 116.

Further, since it is sufficient to emit the core mold closed mold cylinder 116 as long as the mold closing force for closing the injection core mold 112 is obtained, the injection mold closed mold cylinder 116 can be made relatively small.

Here, at the same time as the molding operation of the injection molding station 68, a temperature-adjusting mandrel (not shown) is inserted into the temperature-regulating can 86 at the temperature-regulating station 72 by the temperature-adjusting mandrel lifting cylinder 98, and the preform 124 is performed. The warmth of the tone.

Further, in the blow molding station 70, the blow core mold 100 is lowered by blowing the core mold lifting cylinder 102, and the blow mold core 100 is closed to the neck mold 90, and the lift cylinder 106 is extended by the extension rod. The extension rod 104 is lowered, and air is blown into the blow cavity mold 84 to thereby biaxially stretch the temperature-adjusted preform 124 to form a bottle (first container) 126.

Moreover, in the take-out station 74, by ejecting the cam lift cylinder 110, the eject cam 108 is lowered and transmitted through the neck mold support plate 92 to open the neck mold 90, and the bottle 126 is dropped, and then by the blower 88 The bottle 126 is discharged to the outside of the device. In addition, a pair of divided plates constituting the neck mold supporting plate 92 are always set in a locked state by a spring, whereby the neck mold 90 can be It is in closed mode. Further, the pair of divided plates are provided with wedge-shaped holes (not shown), and are provided at both end portions in the longitudinal direction thereof. The mold opening of the neck mold 90 is carried out in such a manner that the ejecting cam 108 driven by the ejecting cam lifting cylinder 110 is lowered toward the wedge hole and the split plate is opened.

Next, after the completion of each forming step, the blow cavity mold 84 is opened by the blow mold closing mechanism 82, and the upper base 56 is raised by the neck mold closed cylinder 120, and the core mold is closed by the injection mold. The mold cylinder 116, the temperature-adjusting core mold lifting cylinder 98, the blow-up core mold lifting cylinder 102, the extension rod lifting cylinder 106 and the ejecting cam lifting cylinder 110 enable the injection core mold 112, the temperature-adjusting core mold, the blow-molded core mold 100, and the extension When the lever 104 and the eject cam 108 are shunted from the position of the rotary disk 66, the rotary disk 66 will be in a rotatable state.

In this state, the rotary disk 66 can be intermittently driven by the electric motor 94, and the processing of each processing station can be sequentially performed.

Further, an auxiliary mold closing cylinder 128 is provided below the blow molding station 70 of the traction plate 58, and a piston end (not shown) of the auxiliary mold closing cylinder 128 is coupled to the lower base 54 to be ejected. The lifting and lowering of the upper base 56 on the side of the forming station 68 and the side of the blow molding station 70 is good, and the lifting is smoothly performed.

Further, in the machine table 52, a synchronizing means 130 for synchronizing the auxiliary mold closing cylinder 128 and the neck mold closing cylinder 120 is disposed.

The synchronizing means 130 is composed of two racks 132, a rotating shaft 134, and two pinions 136, and the two racks 132 are suspended from each other and disposed on the lower base 54. Forming station 68 side and blowing On the side of the forming station 70, the rotating shaft 134 is disposed between the injection molding station 68 side of the traction plate 58 and the blowing station 70 side. The two pinion gears 136 are fixed to the rotating shaft 134 and are associated with the respective teeth. The strips 132 are engaged. Further, in the injection molding station 68, a stopper rod 140 for assistingly restricting the lowering limit of the upper base 56 is also provided.

2.2 2 station injection blow molding machine

The two-station type injection blow molding machine 200 which is switched by the replacement of the parts by using the basic structure of the four-stage injection stretch blow molding machine shown in Figs. 5 to 7 is referred to Fig. 8 to Figure 11 is used to illustrate.

In the two-station type of injection blow molding machine 200, the four stations of the temperature extension station 72 (2C) and the removal station 74 (4C) of the extension blow molding machine 50 are not used, but only the preforms or the use. The second exit mandrel that supports the preform passes. Since the second shot core mold does not rise when the mold is opened, the temperature adjustment station 72 (2C) or the take-out station 74 (4C) does not interfere when moving toward the blow molding station, so that it is basically not necessary to remove. . It is only necessary to remove it in the case of a member that interferes with the temperature-measuring medium of the second shot core mold or the supply piping of the air (for example, a temperature-regulating tank).

The injection molding station 68 (1C) of the four-stage injection stretching blow molding machine 50 is changed to the injection molding station 251 of the injection blow molding machine 200 shown in Figs. 8 and 9 by replacement of the parts. (1C). The blow molding station 70 (3C) of the four-stage injection stretch blow molding machine 50 is changed to the injection blow shown in Figs. 8 and 9 by the replacement of the mold parts. The blow molding station 202 (3C) of the forming machine 200.

2.2.1. Injection molding station

First, the injection molding station 201 (1C) of the blow molding machine 200 will be described with reference to Figs. 8 and 9.

First, in the rotary disk 66 (20) shown in Figs. 8 and 9, a transfer member (transfer die unit) 210 for injection blowing is attached instead of the neck mold 90 shown in Fig. 7 and A transfer member composed of a neck mold support plate 92. The transfer member 210 may include, for example, a second neck mold 211 composed of a pair of split molds, an exit core mold 212, a neck mold fixing plate 213, a neck mold pressing plate 214, a core mold fixing plate 215, and a core mold pressing plate. 216 and insulation board 217. The neck mold fixing plate 213 is composed of a pair of split plates, and a pair of second neck molds 211 can be fixed. Further, although the neck mold fixing plate 213 is not shown, a passage for the coolant is provided. The neck mold pressing plate 214 is a split plate that opens and closes the neck mold fixing plate 213. The neck mold pressing plate 214 is biased upward by a spring (not shown) so as to be in close contact with the mandrel fixing plate 215. Thereby, the mold closing state of the injection core mold 212 and the neck mold 211 can be set. The injection core mold 212 is held by the core mold pressing plate 216 and the core mold fixing plate 215. The core mold pressing plate 216 is formed with a temperature-adjusting medium supply and discharge passage 216A, and the core mold fixing plate 215 is formed with a blowing supply passage 215A. Here, one of the core mold fixing plate 215 or the core mold pressing plate 216 may be provided, and a temperature regulating medium supply passage and a blowing supply path may be provided. In addition, the details of the injection core mold 212 will be described later using FIG.

Even at the injection molding station 201 (1C) of the injection blow molding machine 200 Among them, the hot runner die 76 that makes nozzle contact with the injection device 64 is also fixed to the lower base 54 and can be shared with the injection stretch blow molding machine 50. The second injection cavity mold 220 of the injection blow molding machine 200 is mounted on the hot runner die 76.

In the eighth drawing, the open state of the upper base 56 at the upper limit position is shown in the same manner as the seventh embodiment, and the ninth figure shows the closed state of the upper base 56 at the lower limit position. In order to selectively realize the injection molding station 68 (1C) of the injection stretch blow molding machine 50 and the injection molding station 201 (1C) of the injection blow molding machine 200 in one blow molding machine, it is necessary to satisfy the following Essentials. First, the dimensions L3 and L4 at the time of mold opening shown in Figs. 7 and 8 are the same in Figs. 7 and 8. Next, the dimension L5 at the time of closing the mold shown in Figs. 6 and 9 is the same in Figs. 6 and 9.

The dimension L4 is the distance from the lower surface of the upper base 56 (the upper surface of the rotary disk 66) to the upper surface of the lower base 54 at the time of mold opening. The dimension L5 is the distance from the lower surface of the upper base 56 (the upper surface of the rotary disk 66) to the upper surface of the lower base 54 when the mold is closed. Since the movement stroke of the upper base 56 is the dimension L1 shown in Fig. 6, the relationship of L5 = L4 - L1 is established. Since the longitudinal mold closing mechanisms 58, 62, 120 are common, the injection molding station 68 (1C) that projects the extension blow molding machine 50 and the injection molding station 201 (1C) that exits the blow molding machine 200 have a size L4, L5 becomes the same. This size L4, L5 is also used for all processing stations, even at the blow molding station. In the present embodiment, since the hot runner die 76 is shared, the upper pedestal at the time of mold opening is reached. The distance L3 from the lower surface of 56 (the upper surface of the rotary disk 66) and the upper surface of the hot runner die 76 is also the same in FIGS. 7 and 8. Further, in a state where the upper base 56 is opened, the first preform 124 of Fig. 7 and the second preform 205 of Fig. 8 are completely released from the respective ejection cavity molds 78, 220, and It can be transported by rotation. In other words, the length of the trunk portion (the total length - the length of the neck portion) of the first and second preforms 124, 205 is smaller than the movement stroke L1 of the upper base 56. However, depending on the model, it can be set to L5 < L4.

Here, the thickness of the transfer member 210 shown in Figs. 8 and 9 is thicker than the transfer member constituted by the neck mold 90 and the neck mold support plate 92 shown in Fig. 7 . Therefore, it is necessary to consider the difference in thickness of the transfer members of the two models, and determine the sizes L3 to L5. At this time, the first container 126 formed by the injection stretch blow molding machine 50 is a beverage bottle or the like and also extends toward the longitudinal axis, so that the total height is large. On the other hand, the second container formed by the injection blow molding machine 200 is a medicine bottle, a cosmetic container, a lactic acid beverage container, a bulb cover, etc., and the total height is smaller than that of the first container 126. Therefore, if the dimensions L3 to L5 are determined based on the total height of the first container 126 formed by the injection stretch blow molding machine 50 and the preform 124 used for use, even in the injection blow molding machine 200 It is also able to satisfy the sizes L3 to L5.

In the injection molding station 201 (1C) of the injection blow molding machine 200, the injection core mold closing cylinder 116 shown in Fig. 6 and the injection core mold closing template 114 connected to the piston 118 may not be used. These components are not subjected to the injection molding operation at the injection molding station 201 (1C). Or the rotation handling action causes obstacles or does not remove. Alternatively, instead of the injection core mold, a pressing (pressure-bearing) block may be provided on the injection core mold closing die plate 114, and the injection core mold closing die plate 114 may be raised and lowered by projecting the core mold closed mold cylinder 116. In this regard, description will be made with reference to Figs. 22 to 28.

2.2.2. Blowing station

Fig. 10, Fig. 12, and Fig. 13 show the closed state of the blow molding station 202 (3C) which is ejected to the blow molding machine 200. Fig. 11 is an enlarged view of a portion A of Fig. 10, showing the details of the injection core mold 212. In the blow molding station 202 (3C), a second blow cavity mold 230 composed of a pair of split molds is disposed. The pair of split molds of the second blow cavity mold 230 are attached to the blow mold closing mechanism 82 shown in Fig. 6. The bottom mold 232 shown in Fig. 10 is integrally opened and closed with one of a pair of split molds constituting the second cavity mold 230.

The injection molding station 201 (1C) shown in Fig. 8 is opened, and the transfer member 210 supporting the second preform 205 is carried into the blow molding station 202 by the 180-degree rotation of the rotary disk 66 (20). (3C). Thereafter, the upper base 56 is lowered, and the second blowing cavity mold 230 is laterally closed by the blowing mold closing mechanism 82 shown in Fig. 6, whereby the closing shown in Fig. 10 can be set. Modal state.

In the closed mode shown in Fig. 10, the second preform 205 can be blown into the second preform 205 by introducing the blow air from the injection core mold 212 held by the transfer member 210. The second container 206 having the shape of the trunk portion and the bottom portion of the cavity mold surface 231 of the second blow cavity mold 230 (Refer to Figure 12). At this time, unlike the injection stretch blow molding machine 50, the extension rod 104 is not used. The extension rod 104 that is projected out of the stretch blow molding machine 50 is removed in the event of interference with the transfer member 210. Since the extension rod 104 is not used, the second preform 205 hardly extends toward the vertical axis but extends in the horizontal axis direction.

As shown in Fig. 11, the second injection core mold 212 has the first core mold pin 212A and the second core mold pin 212B, and an air flow is formed between the first core mold pin 212A and the second core mold pin 212B. Road 212C and air outlet 212D. The air flow path 212C communicates with the air supply path 215A shown in Fig. 10 . The first core die 212A has a trunk shape of the second preform 205, and the upper portion thereof is inserted into the second core pin 212B. Further, the first core die pin 212A has a hollow shape in which the front end is closed, and the temperature adjustment medium circulation flow path 212E provided in the first core die pin 212A and the temperature adjustment medium supply/discharge path 216A shown in FIG. Connected. The second core mold pin 212B has a neck inner surface shape of the second preform 205, and the upper outer surface thereof is in contact with the second neck mold 211. The air blowing port 212D is formed around the inner surface of the lower end of the neck portion of the second preform 205, and blows a high-pressure air blow in the blow molding step.

Figure 12 shows the removal step of the second container 206 at the blow molding station 202 (3C). After the blow molding, the second blow cavity mold 230 can be opened by blowing the mold closing mechanism 82. Thereby, the space in which the neck mold 211, the neck mold fixing plate 213, and the neck mold pressing plate 214 can be lowered can be secured. Here, the upper base 56 is provided with a neck mold lowering cylinder (not shown) for driving the neck mold pressing plate 214 to be driven downward. Driven by the drive of the cylinder The drive lever resists the spring pressure of a spring (not shown) to lower the neck mold pressing plate 214 to be driven away from the lower surface of the mandrel fixing plate 215, and presses the neck mold fixing plate 213 downward. As a result, the container 6 holding the neck portion thereof can be driven from the first core mold pin 212A by the second neck mold 211.

Thereafter, the split mold constituting the second neck mold 211 is driven open, and the second container 206 can be released from the neck mold 211. Here, the pair of divided plates constituting the neck mold fixing plate 213 are always set in a closed state by the spring, whereby the second neck mold 211 can be in a closed state. Further, in the pair of divided plates, wedge-shaped holes (not shown) are provided at both end portions in the longitudinal direction. The mold opening of the second neck mold 211 is carried out in such a manner that the eject cam driven by the eject cam lifting cylinder disposed in the blow molding station 202 (3C) is lowered toward the wedge hole, and the split plate is opened. .

Here, after the second blowing cavity mold 230 is opened, and before the removal of the second container 206 is performed, as shown in Fig. 12, the take-out device (not shown) is driven, and the rail is driven. The member 240 is drawn out below the second container 206. Therefore, the second container 206 dropped from the neck mold 211 is blocked by the rail member 240. Thereafter, by returning the rail member 240 to its original position, the second container 206 can be taken out to the outside of the apparatus. The second container 206 may be taken out or replaced with an arm member that holds the neck of the second container 206 instead of the rail member 240.

Figure 13 is a view showing the rotational carrying step of the transfer member 210 of the blow molding station 202 (3C). In Fig. 13, by the upper base 56 being reset to the upper limit position, the transfer member 210 can be raised until the first core die 212A does not interfere with the second blow cavity die 230 and the second exit cavity die 220. Height position. Therefore, by rotating the rotary disk 66 (20) in this state, the transfer member 210 can be returned to the injection molding station 201 (1C).

Further, in Fig. 13, the second blowing cavity mold 230 is placed in the next blowing shape, and is moved from the mold opening state shown in Fig. 12 toward the mold closing direction. Thereby, the closing mode and the mold closing time of the second blowing cavity mold 230 are shortened.

As described above, according to the present embodiment, by replacing the parts, one blow molding machine can be switched to both the injection stretch blow molding machine 50 and the injection blow molding machine 200, and it is possible to ensure that it is suitable for a plurality of types. A small amount of production. Further, since the injection stretch blow molding system has the temperature adjustment station 2C and the dedicated take-out station 1D, the molding cycle of the container having the high molded product can be quickly performed. Moreover, since the injection blow molding machine has the smallest two stations, the number of parts is small and it can be manufactured at low cost.

3. 4-station type blow molding machine

The four-station injection stretch blow molding machine is constructed by the four-station type blow molding machine shown in Fig. 4, and is omitted from the injection stretch blow molding machine 50 shown in Figs. 5 to 7 Description.

On the other hand, in the case of constructing a 4-station injection blow molding machine using the four-station type blow molding machine shown in Fig. 4, the injection molding station 1D shown in Fig. 4 is connected to Fig. 8 to The injection molding station 1C shown in Fig. 9 is identical. The blow molding station 2D shown in Fig. 4 corresponds to the blow molding station 3C shown in Figs. 10 and 11. However, as shown in Figure 12 The container take-out step is not carried out, but the mold transfer and the conveyance are directly performed while the transfer member 210 shown in Fig. 13 holds the second container 206.

In the take-out station 3D shown in Fig. 4, the step of taking out the second container 206 shown in Fig. 12 is performed. However, in the take-out station 3D, the second blow cavity mold 230 shown in Fig. 12 does not exist. Further, as a member required to take out the second container 206, a cylinder for driving the neck mold pressing plate 214 to be driven down, an ejecting cam lifting cylinder, and the like are disposed in the take-out station 3D.

The mandrel cooling station 4D shown in Fig. 4 is shown in Fig. 14. In the mandrel cooling station 3D, the transfer member 210 can be conveyed by the rotary disk 66 (20) in a state where the first core die 212A is exposed as shown in Fig. 14. This is because the second container 206 has been taken out at the take-out station 3D on the upstream side of the mandrel cooling station 4D.

In the mandrel cooling station 4D, a rod 251 of, for example, two cylinders 250 fixed to the lower base 54 is supported by a core mold cooling unit 260. The core mold cooling unit 260 is formed with a hole 261 that can be inserted into the size of the first core mold pin 212A held by the transfer member 210, and the number of the holes 261 is the same as the number of the first core mold pins 212A. A refrigerant supply path 262 is formed in the circumferential direction as indicated by a broken line around the hole 261. A plurality of refrigerant outlet holes 263 penetrating from the refrigerant supply path 262 toward the inner circumferential surface of the predetermined hole 261 are formed at equal intervals in the circumferential direction of the hole 261.

When the transfer member 210 is carried into the mandrel cooling station 4D, the mandrel cooling unit 260 stands by at a lower position that does not interfere with the first mandrel pin 212A. After the transfer member is carried in, the two cylinders 250 are driven, but The rod 251 is reciprocally driven in the up and down direction.

The mandrel cooling unit 260 held by the rod 251 reciprocates up and down in a state in which the first mandrel pin 212A is inserted into the plurality of holes 261. During the vertical movement, the refrigerant such as air is discharged from the refrigerant outlet hole 263, whereby the first core die 212A can be cooled. In this manner, the first core die 212A can be sufficiently cooled before the transfer member 210 is returned to the injection molding station 1D.

By arranging the core mold cooling station 4D, the second shot core mold 212 is different from the first shot core mold 90, and it is not necessary to internally pass the temperature medium. Thereby, even a fine-mouth container containing eye drops or mascara can be formed into an injection blow shape. This is because the first core pin 212A of the second injection core mold 212 is formed of a solid rod having no temperature-adjusting medium passage, and the core mold pin diameter is formed to be, for example, 8 mm or less, and can be combined with the fine-mouth container. The caliber is consistent. Further, as a result of not requiring the temperature-adjusting medium supply and discharge path on the transfer member 210, since the structure of the transfer member 210 is simple, the mold cost of the transfer member 210 can be reduced.

Thus, the four-station type of blow molding machine shown in Fig. 4 is superior to the blow molding machine shown in Fig. 3 in that it can be used to eject a container that is blown into a finer mouth, or With a dedicated take-out station 3D, the forming cycle becomes faster.

4. 3-station type blow molding machine

Construct 3 stations using the 3-station blow molding machine shown in Figure 2 The injection stretch blow molding machine removes the temperature adjustment station 2C from the injection stretch blow molding machine shown in Figs. 5 to 7, and implements the rotary disk 66 (20) at a rotation angle of 120 degrees each time. It can be rotated intermittently.

On the other hand, when the three-stage injection blow molding machine is constructed by the three-station type blow molding machine shown in Fig. 2, the injection molding station 1D shown in Fig. 2 and the eighth to ninth drawings are shown. The injection molding stations 1C shown are identical. The blow molding station 2B shown in Fig. 2 is identical to the blow molding station 3C shown in Figs. 10 to 11. However, the container take-out step shown in Fig. 12 is not carried out, but the second container 206 is held in the state of the transfer member 210 shown in Fig. 13, and the mold opening and the rotation conveyance are performed. The blow molding station 2D of Fig. 4 is the same.

In the take-out station 3B shown in Fig. 2, the step of taking out the second container 206 shown in Fig. 2 is carried out. In the take-out station 3B, the mandrel cooling step shown in Fig. 14 can also be carried out. This is because the second container 206 is taken out after the take-out station 3B, and the same state as in the fourteenth figure can be secured. At this time, the rail member 240 of the take-out device shown in FIG. 12 may be disposed in the take-out station 3B so as not to interfere with the cooling unit 260 by the dropped second container 206.

The three-station type blow molding machine shown in Fig. 2 is not suitable for the first container 126 having a complicated shape because the injection molding is performed without performing the temperature adjustment operation of the preform. However, as long as the temperature is not present, Since the three processing stations 1B to 3B can be arranged close to each other, the diameter D2 of the rotating disk 66 (20) can be made smaller than the diameter D3 of the third and fourth drawings, and the size can be reduced. Moreover, the injection blow molding system can be compared with the third figure. The 2-station type also speeds up the forming cycle. Further, when the core mold cooling station of Fig. 14 is provided in the take-out station 3B, the second container 206 having a diameter of 8 mm or less can be formed into a blow shape.

5. 2-station type blow molding machine

The two-station type blow molding machine shown in Fig. 1 is only required to exclude the second and fourth stations 2C and 4C from the four-station/2-station type blow molding machine shown in Fig. 3. Further, in the blow molding station 3A of Fig. 1, the rail member 240 of the take-out device shown in Fig. 12 is disposed, and in addition to being carried out in the case of the injection blow molding machine, it is also possible to blow the blow shape in the injection stretcher. The situation of the machine is carried out.

The two-stage type blow molding machine shown in Fig. 1 is not suitable for the first container 126 having a complicated shape because the injection molding is performed without performing the temperature adjustment operation of the preform. However, as long as there is no temperature adjustment The station and the dedicated take-out station can arrange the two processing stations 1A and 3A close to each other, so that the diameter D1 of the rotating disk 66 (20) can be formed smaller than the diameters D2 and D3 of the second to fourth figures, and It can be miniaturized.

6. Rotating the rotary joint of the blow molding machine

The injection molding station of the two-station type injection blow molding machine 200 that uses the four-station injection stretch blow molding machine 50 shown in Figs. 5 to 7 and that is switched by the replacement of the parts will be used. 201 and blow molding station 202 are shown generally in Fig. 15. As shown in Fig. 15, the rotation of the rotary disk 66 is fixed at two points away from the rotation angle by 180°. The member 210 is delivered.

The two transfer members 210 are provided with temperature-adjusting medium supply and discharge passages 216A as shown in Fig. 8 . As shown in Fig. 15, a temperature adjustment medium supply and discharge passage 216A of two transfer members 210 that are rotationally driven by the rotary disk 66 is provided with a rotary joint 270 for venting the medium, and the rotary joint 270 is rotated. Supported by the tray 66. Each of the two transfer members 210 is coupled to the rotary joint 270 by the first and second pipes 210A and 210B. The temperature adjustment medium can be supplied from the rotary joint 270 to the transfer member 210 by the first pipe 210A, and the temperature adjustment medium can be returned from the transfer member 210 to the rotary joint 270 by the second pipe 210B.

Fig. 16 is a side view of the injection blow molding machine 200, and the lower end of the rotary joint 270 supported by the rotary disk 66 is provided with a pipe support member 290 for supporting the two pipes 291 and 292 to be coupled to the traction plate 58. Since the traction disk 58 and the rotary disk 66 can be integrally lifted and lowered, the rotary joint 270 and the pipe support member 290 can also be integrally moved up and down. One of the pipes 291 supported by the pipe supporting member 290 supplies a temperature-adjusting medium, and the other pipe 292 discharges the temperature-regulating medium.

Next, the details of the rotary joint 270 will be described with reference to Figs. 17 to 20. The rotary joint 270 is disposed inside the cylindrical casing 271 shown in Fig. 18, and the fixed shaft body 280 shown in Fig. 19 is disposed and assembled in the same manner as in Fig. 17. The flange 272 of the housing 271 can be fixed to the rotary disk 66 by bolts, and the housing 271 is rotated integrally with the rotary disk 66. On the other hand, the fixed shaft body 280 is fixed to the relay piping portion 285 and is not rotated.

As shown in FIG. 18, a through hole 273 into which the fixed shaft body 280 is inserted is formed in the casing 271. In the through hole 273, O-ring grooves 274A, 274B, and 274C having an inner diameter larger than the inner diameter of the through hole 273 are formed at three places in the vertical direction. The region 275 partitioned by the O-ring and the rotating shaft body 280 disposed in the O-ring grooves 274A and 274B serves as a supply passage, and the region 276 partitioned by the O-ring and the rotating shaft body 280 disposed in the O-ring grooves 274B and 274C becomes Discharge path.

The two first openings 275A and 275B that communicate with the supply passage 275 are opened on the circumferential surface of the casing 271. The first opening 275A communicates with the first pipe 210A that is coupled to one of the transfer members 210, and the first opening 275B communicates with the first pipe 210A that is coupled to the other transfer member 210.

Similarly, the two second openings 276A and 276B that communicate with the discharge passage 276 are opened on the circumferential surface of the casing 271. The second opening 276A communicates with the second pipe 210B that is coupled to one of the transfer members 210, and the second opening 276B communicates with the second pipe 210B that is coupled to the other transfer member 210.

As shown in Fig. 17, the fixed shaft body 280 rotatably supports the casing 271 through the bearings 277A, 277B. As shown in Fig. 19, the fixed shaft body 280 has two ring grooves 281, 282 on the outer peripheral surface corresponding to the supply passage 275 and the discharge passage 276 of the casing 271. The ring groove 281 connects the first longitudinal hole 281A to communicate with the lower end opening, and the ring groove 282 connects the second longitudinal hole 282A to communicate with the lower end opening.

As shown in Figures 17 and 20, the connection to the fixed shaft body is provided. The relay piping portion 285 at the lower end of 280. The relay piping portion 285 has a passage 286 that communicates with the lower end opening of the longitudinal hole 281A of the fixed shaft body 280, and a passage 287 that communicates with the lower end of the longitudinal hole 282A of the fixed shaft body 280. The passage 286 is in communication with a pipe 291 supported by the pipe support member 290. The passage 287 is in communication with a pipe 292 supported by the pipe support member 290.

According to the present embodiment, the two transfer members 210 that are rotationally driven together with the rotary disk 66 can be circulated through the rotary joint 270 to circulate the temperature-regulating medium. In particular, since the casing 271 connected to the two transfer members 210 by the intermediate pipes 210A and 210B rotates together with the rotary disk 66, the relative positional relationship between the casing 271 and the two transfer members 201 does not change. Therefore, the pipes 210A and 210B are not twisted and broken as the rotating disk 66 rotates.

Further, since the pipe support member 290 that supports the connection of the rotary joint 270 and the external pipes 291 and 292 is integrally moved up and down with the rotary joint 270, it is not necessary to wind the pipes 291 and 292 redundantly.

In the above embodiment, although it is a rotary joint for supplying the medium to the two transfer members 210, it is also possible to discharge other fluids. Examples of other fluids include blowing. Although the air blowing may be supplied only through the air supply path 215A as shown in Fig. 8, a path for exhausting the air in the blown container may be provided. Further, as another fluid, for example, a coolant that is supplied to the neck mold 211 of the transfer member 210 shown in Fig. 8 can be cited.

Figure 21 shows the supply and exhaust of a medium with a temperature-adjustable medium. The housing 300 of the rotary joint of the six independent paths for the supply and discharge of the coolant. In the casing 300, six supply/discharge paths 301A to 301F separated by seven O-ring grooves 302 are formed. If the fixed shaft body suitable for the housing 300 is disposed inside, a rotary joint having six independent paths can be provided.

Here, the two paths are the supply and exhaust passages of the temperature-adjusting medium, and the other two paths are the passages of the coolant, and it is necessary to insulate them from each other. Therefore, the two central passages 301C and 301D are regarded as the supply and exhaust passages for blowing in the longitudinal direction, and for example, the passages 301A and 301B for supplying and discharging the temperature-adjusting medium and the passages 301E and 301F for supplying and discharging the coolant can be performed. The air is insulated.

7. Injection molding of the forming station 7.1. Injection-out stretch blow molding machine

Figure 22 is a closed mold showing the injection molding station of the injection stretch blow molding machine. Among the members shown in Fig. 22, members having the same functions as those of Fig. 7 are given the same reference numerals.

In the same manner as in the seventh embodiment, the cylinder fixing plate 60 is fixed to the upper ends of the two tie bars 62 which are raised and lowered by the lower cylinder 120, and the upper cylinder 116 is fixed to the cylinder fixing plate 60. The front end of the piston 118 of the upper cylinder 116 is coupled to the mold closing disk 114. In the mold closing tray 114, the injection core mold fixing plate 112A is fixed by bolts, whereby the core mold 112 can be fixedly projected on the mold closing tray 114.

As shown in FIG. 22, the upper base 56 is provided opposite to one opening 21 (see FIGS. 1 to 4) provided on the rotary disk 20. Opening 56A. First, when the lower cylinder 120 is driven, the upper base 56 and the rotary disk 20 can be lowered through the tie rod 62, and the neck mold 90 supported by the rotary disk 20 can be closed to the injection cavity mold 78. At this time, the injection core mold 112 can also be lowered through the cylinder fixing plate 60, the upper cylinder 116, and the mold closing disk 114. At this time, the core mold 112 is placed in the injection cavity mold 78 so as not to interfere with the upper base 56 and the rotary disk 20 through the openings 56 and 21. Thereafter, the first injection core mold 112 fixed to the lowered mold plate 114 by the upper cylinder 116 is further lowered. Thereby, the neck mold 90 and the exit core mold 112 can be closed to the injection cavity mold 78 supported by the lower base side. The above operation is performed in the same manner in Fig. 7.

7.2. Injection molding of injection molding machine

Fig. 23 is a view showing the injection mold closing of the injection blow molding machine using the mechanism shown in Fig. 22. As described above, since the transfer mold unit (transfer member) 210 shown in FIG. 23 is fixed to the rotary disk 20, the transfer mold unit 210 can be closed only by the lower cylinder 120 without using the upper cylinder 116. . However, in Fig. 23, the upper cylinder 116 is used in the same manner as in Fig. 22 to mold the transfer die unit 210.

Therefore, in place of the injection mold block 112 shown in Fig. 22, the pressure receiving block 400 shown in Fig. 23 is fixed to the mold closing plate 114 by bolts. First, when the lower cylinder 120 is driven, the upper base 56 and the rotary disk 20 are lowered by the tie bars 62, and the transfer die unit 210 supported by the rotary disk 20 is closed. At this time, the pressure receiving block 400 can also pass through the cylinder fixing plate 60. The upper cylinder 116 and the closed mold disk 114 are lowered. At this time, the pressure receiving block 400 is lowered in such a manner as to interfere with the upper base 56 and the rotary disk 20 without passing through the openings 56 and 21.

Thereafter, the pressure receiving block 400 fixed to the lowered mold plate 114 by the upper cylinder 116 is further lowered. Thereby, the pressure receiving block 400 directly presses the transfer mold unit 210, and the transfer mold unit 210 can mold the injection cavity mold 220.

Here, in the case where the upper cylinder 116 is not used, the lower cylinder 120 pulls the upper base 56, and the transfer mold unit 210 is closed by the upper base 56 and transmitted through the rotary disk 20, and is compared with the present embodiment. . When the upper cylinder 116 is not used, a mold closing force acts on the rotary disk 20 between the upper base 56 and the moving die unit 210. Thereby, the rotating disk 20 having a weak rigidity is deformed. The deformation of the rotary disk 20 causes an obstacle when the upper base 56 is rotationally driven, and abnormal noise or poor rotation occurs.

In the present embodiment, since the pressure receiving block 400 is fixed to the mold closing disk 114 driven by the lower cylinder 120 together with the upper base 56, and the pressure receiving block 400 directly presses the moving mold unit 210, The upper base 56 or the rotary disk 20 will be fastened. Therefore, it is possible to prevent the malfunction at the time of rotation due to the deformation of the rotary disk 20.

7.3. Relationship between upper cylinder and lower cylinder

In the present embodiment, the cylinder bores of the lower cylinder 120 and the upper cylinder 116 are substantially the same, and can be set to the same pressure when the mold is closed. In order to The lower cylinder 120 and the upper cylinder 116 are set to the same pressure, and it is only necessary to short-circuit the circuit of the pressure medium such as oil. The pressing force of each of the lower cylinder 120 and the upper cylinder 116 is equal because it is a pressure receiving area × pressure. The respective pressing forces of the lower cylinder 120 and the upper cylinder 116 are downwardly acting.

Here, in the closed mode in which the lower cylinder 120 and the upper cylinder 116 are driven together by the same pressure, the downward pressing force of the lower cylinder 120 and the upward pressing force against the downward pressing force of the upper cylinder 116 may occur. Balanced and offset. Therefore, only the pressing force of the upper cylinder 116 is made to the mold closing force. This can be applied to the injection mold of the injection stretch blow molding machine shown in Fig. 22, and can also be applied to the injection mold closing of the injection blow molding machine shown in Fig. 23.

In the injection blow molding machine, the pressure receiving block 400 is fixed to the mold closing disk 114 driven by the upper cylinder 116, and the pressure receiving block 400 directly presses the transfer mold unit 210. Thereby, the transfer mold unit 210 can be closed. Therefore, the mold closing force does not act on the upper base 56 or the rotary disk 20 at the time of mold closing, and deformation of the rotary disk 20 can be prevented. In the injection stretch blow molding machine, since the injection core mold 112 is fixed to the mold closing disk 114 driven by the upper cylinder 116, the core can be pressed together with the neck mold 90 pressed by the core mold 112. The die 112 is closed. At this time, the mold closing force does not act on the upper base 56 or the rotary disk 20.

7.4. New construction and function of the plug

As mentioned above, the stopper rod 140 shown in Fig. 7 is used for auxiliary The ground limits the lower limit of the upper base 56. In other words, the stopper rod 140 stops the downward movement of the upper base 56 when the mold thickness is erroneously set or the inclination of the upper base 56 is inclined at a predetermined angle or more. Therefore, as shown in the comparative example of Fig. 26 using the stopper rod 140, the gap δ 4 can be secured between the stopper rod 140 and the upper pedestal 56 side at the time of mold closing.

In Figs. 22 and 23, the plunger 410, which is fixed to the lower base 54 and extends upward, is different in construction or purpose from the stopper rod 140 of Fig. 7. The upper end 410B of the stopper rod 410 abuts against the upper base 56 side without a gap when the mold is closed, and supports the upper base 56 at the mold closing position.

The upper base 56 that is driven to be driven by the lower cylinder 120 is balanced by the reaction of the lower cylinder 120 when the mold is closed, and the pressing force can be released. When the mold closing is performed, the upper base 56 abuts against the plug stem 410 and is supported at the mold closing position. Therefore, the height position of the upper base 56 at the time of mold closing can be determined unambiguously, and the rotary disk 20 is not deformed by pressing the rotary disk 20 by the weight of the upper base 56 or the like.

In FIGS. 22 and 23, there may be further provided a spacer member 420 which is interposed between the upper base 56 and the upper end 410B of the plug stem 410 during mold closing to adjust the upper base 56. Closed mold position.

Here, in the 22nd and 23rd drawings, the distance L5 between the lower base 54 and the upper base 56 at the time of mold closing is equal. However, in the injection stretch blow molding machine shown in Fig. 22 and the injection blow molding machine shown in Fig. 23, the lower base 54 and the upper base at the time of closing the mold are not required. The separation distance of 56 from L5 is negligible. There is a case where, in the 22nd and 23rd drawings, the separation distance L5 differs depending on the difference in the height dimension of the injection core mold 112 and the transfer mold unit 210, or the length of the molded article.

In this case, the distance L5 between the upper base 56 and the lower base 54 at the time of mold closing is changed by changing the thickness of the spacer member 420 or the thickness of the spacer member 420. Close the mold position, which makes it easy to adjust.

Fig. 24 is an enlarged view showing the upper end 410B side of the stopper rod 410. As shown in Fig. 24, the spacer member 420 is fixed to the upper base 56 by bolts 431 together with the hollow guide 430 for lifting the guide plug 410. When the bolt 431 is removed, the separation distance L5 can be adjusted by removing the spacer member 410 or replacing it with another spacer member 410 having a different thickness. However, in the comparative example of Fig. 26, since the gap δ 4 can be secured between the plug rod 140 and the upper pedestal 56 side at the time of mold closing, the distance L5 cannot be adjusted even if the spacer member is changed.

7.5. Clearance when closing the mold

Fig. 25 is an explanatory view showing a closed mold shown in Fig. 23 in comparison with a comparative example. Fig. 26 is an enlarged view showing a portion A of the comparative example portion of Fig. 25. Fig. 27 is an enlarged view showing a portion B of the embodiment of Fig. 25.

First, in the present embodiment, as shown in Fig. 27, the first room can be placed between the opposing faces of the pressure receiving block 400 and the upper base 56 when the mold is closed. Gap δ 1. The pressure receiving block 400 is stopped at a position in close contact with the transfer mold unit 210 after the mold is closed. On the other hand, the closed mold position of the upper base 56 fixed by the stopper rod 410 can be adjusted without being affected by the pressure receiving block 400. Thereby, the first gap δ 1 can be secured between the opposing faces of the pressure receiving block 400 and the upper pedestal 56. Thereby, it is ensured that the pressure from the pressure receiving block 400 does not act on the upper base 56, and the rotating disk 20 can be prevented from being deformed by the upper base 56. Further, as shown in Fig. 24, the first gap δ1 may be formed between the opposing faces of the neck mold fixed plate 112A and the upper base 56 at the time of mold closing.

In the comparative example shown in Fig. 26, the pressure receiving block 400A driven by the upper cylinder 116 is different from the pressure receiving block 400 of Fig. 27 for pressing the upper base 56. Thus, the gap δ between the opposing faces of the pressure receiving block 400A and the upper pedestal 56 becomes zero. Therefore, in the comparative example of Fig. 26, the upper base 56 and the rotary disk 20 are sandwiched between the pressure receiving block 400A and the transfer die unit 210 at the time of mold closing. Therefore, an excessive force is applied to the rotary disk 20, and the rotary disk 20 having a relatively low rigidity is deformed.

Next, in the present embodiment, as shown in Fig. 27, the second gap δ 2 can be provided between the opposing faces of the upper base 56 and the rotary disk 20 at the time of mold closing. Originally, the opposing faces of the upper base 56 and the rotary disk 20 are designed to ensure a clearance when the rotary disk 20 is rotated. This is because if this is not the case, the rotation of the rotary disk 20 is adversely affected. In the present embodiment, the force of the pressure receiving block 400 is not transmitted to the upper base 56. Since the upper base 56 can support its own weight by the plug rod 410, it can be in the upper base 56 and the rotary disk 20. The second gap δ 2 similar to that during the rotational conveyance is secured between the opposing faces. Thereby, the rotating disk 20 can be prevented The sandwich is sandwiched between the upper base 56 and the transfer die unit 210, and the rotary disk 20 can be prevented from being deformed.

On the contrary, in the comparative example shown in Fig. 26, the upper base 56 and the rotary disk 20 are sandwiched between the pressure receiving block 400A and the transfer die unit 210 when the mold is closed as described above. Therefore, the same gap δ 2 as that during the rotational conveyance cannot be secured between the opposing faces of the upper base 56 and the rotary disk 20. Therefore, it is deformed by the mold closing force acting on the rotary disk 20.

7.6. Installation structure of the transfer member

The transfer member attached to the rotary disk 20 is the neck mold 90 in the case of the injection stretch blow molding machine, and the transfer mold unit 210 in the case of the injection blow molding machine.

The neck mold 90 is composed of a pair of split molds, and as shown in Fig. 24, a pair of split molds are supported by the two L-shaped guides 500 fixed to the rotary disk 20 in an openable and closable manner. On the other hand, as shown in Fig. 28, the transfer die unit 210 is fixed to the rotary disk 20.

Fig. 28 shows the mounting structure of the transfer die unit 210. The transfer mold unit 210 has a mounting hole 210C. A flanged sleeve 510 is inserted through the mounting hole 210C. The flanged sleeve 510 has a perforated flange 511 and a hollow shaft portion 512 that is inserted through the mounting hole 210C. Since the hollow shaft portion 512 is formed to be somewhat longer than the mounting hole 210C, the mold unit 210 and the rotary disk 20 can be transferred by fastening the bolt 520 inserted into the flanged sleeve 510 to the rotary disk 20. A certain third gap δ 3 is ensured between them, and at the same time, the flange 511 and the rotating disk 20 can be locked together. The knot moves the mold unit 210. Further, in Fig. 28, the gasket 530 is interposed between the head portion 521 of the bolt 520 and the flange 511 to prevent locking.

Here, since the neck mold 90 has a constant third gap δ 3 by the L-shaped guide 500 and can be opened and closed by the rotary disk 20, the rotary disk 20 having a relatively low rigidity is not deformed. On the other hand, as shown in the comparative example of Fig. 26, when the transfer die unit 210 is bolted to the rotary disk 20, the rotating disk having weak rigidity is tightened on the relatively wide surface of the transfer die unit 210. Deformation occurs, and there is a problem that adversely affects the rotational drive of the rotating disk.

In this regard, since the flanged sleeve 510 shown in Fig. 28 has a certain gap δ 3 between the flange 511 and the rotary disk 20 to lock the movable mold unit 210, it acts only on the convex portion. The locking coupling force of the area of the rim 511 acts on the rotary disk 20, and the load on the rotary disk 20 becomes small. Thereby, deformation of the rotary disk 20 can be suppressed, and the second gap δ 2 can be easily secured between the opposing faces of the rotary disk 20 and the upper base 56.

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit and scope of the invention.

1A to 1D, 68, 201, 251‧‧ ‧ injection forming station

2B, 2D, 3A, 3C, 3D, 70, 202‧‧‧ blow forming stations

3B, 4C, 4D, 74‧‧‧ withdrawal station

2C, 2D, 72‧‧‧ Wen Ting Station

3B, 4D‧‧‧ mandrel cooling station

20, 66‧‧‧ rotating disk

21 to 24 ‧ ‧ openings

50‧‧‧Injection stretch blow molding machine

52‧‧‧ machine

54‧‧‧Lower base

56‧‧‧Upper pedestal

56A‧‧‧ openings

58‧‧‧ traction board

60‧‧‧ fixed plate

62‧‧‧ tied

64‧‧‧Injection device

58, 62, 120‧‧‧ Longitudinal closed-mode mechanism

76‧‧‧hot runner mold

78‧‧‧1st shot cavity mode

80‧‧‧Blowing mold closed cylinder

82‧‧‧Blowing closed mold mechanism

84‧‧‧1st blown cavity mold

86‧‧‧Temperature cans

88‧‧‧Blowing machine

90‧‧‧1st neck mold

92‧‧‧Neck mold support plate

94‧‧‧Electric motor

96‧‧‧ Positioning mechanism

98‧‧‧Weight-adjustable mandrel lifting cylinder

90, 92‧‧‧Transfer components

100‧‧‧Blowing mould

102‧‧‧Blowing mandrel lifting cylinder

104‧‧‧Extension rod

106‧‧‧Extension rod lifting cylinder

108‧‧‧Ejecting cam

110‧‧‧Ejecting cam lifting cylinder

112‧‧‧1st shot mandrel

114‧‧‧ shot core mold closed template

116‧‧‧Upper cylinder (shot core mold closed mold cylinder)

118, 122‧‧‧ piston

120‧‧‧Lower cylinder (neck mold closed mold cylinder)

124‧‧‧1st preform

126‧‧‧1st container (bottle)

128‧‧‧Auxiliary closed mold cylinder

130‧‧‧Synchronous means

132‧‧‧ rack

134‧‧‧Rotary axis

136‧‧‧ pinion

138‧‧‧stops

140‧‧‧plug

181A, 282A‧‧‧1st and 2nd longitudinal holes

200‧‧‧ shot blow molding machine

205‧‧‧2nd preform

206‧‧‧2nd container

210‧‧‧Transfer components (transfer die unit)

210A, 210B‧‧‧1st and 2nd pipes

210C‧‧‧ hole

211‧‧‧2nd neck mold

212‧‧‧2nd shot mandrel

212A‧‧‧1st core pin

212B‧‧‧2nd core pin

212C‧‧‧Air flow path

212D‧‧‧Air blowout

212E‧‧‧Temperature medium circulation flow path

213‧‧‧Neck mold fixing plate

214‧‧‧Neck mold compression plate

215‧‧‧ mandrel fixing plate

215A‧‧‧Supply Road

216‧‧‧ mandrel compression plate

217‧‧‧Insulation board

220‧‧‧2nd shot cavity mode

230‧‧‧2nd blow cavity mold

232‧‧‧Bottom mode

240‧‧‧ rail components

250‧‧‧ cylinder

251‧‧‧ rod

260‧‧‧Mandrel cooling unit

261‧‧‧ hole

262‧‧‧Refrigure supply road

263‧‧‧Refrigerant export hole

270‧‧‧Rotary joint

271, 300‧‧‧ shell

272‧‧‧Flange

273‧‧‧through holes

274A to 274C‧‧O ring groove

275‧‧‧Supply access (region)

275A, 275B‧‧‧ first opening

276‧‧‧Drainage path (area)

276A, 276B‧‧‧2nd opening

277A, 277B‧‧‧ bearing

280‧‧‧Rotating shaft

281, 282‧‧ ‧ ring groove

281A‧‧‧1st longitudinal hole

282A‧‧‧2nd longitudinal hole

285‧‧‧Relaying Department

286, 287‧‧ ‧ access

290‧‧‧Pipe support members

291, 292‧‧‧ piping

301A to 301F‧‧‧Supply/discharge road

302‧‧‧O ring groove

400, 400A‧‧‧ pressure block

410‧‧‧ plug

410A‧‧‧Bottom

410B‧‧‧Upper

420‧‧‧ spacer components

431, 520‧‧‧ bolts

500‧‧‧L word guide

510‧‧‧with flanged sleeve

511‧‧‧Flange

521‧‧‧ head

530‧‧‧Washers

Radius of D1 to D3‧‧

L1 to L5‧‧‧ dimensions (interval, distance, stroke)

INJ‧‧‧ injection blow molding machine

STR‧‧‧Injection stretch blow molding machine

δ, δ1 to δ4‧‧‧ gap

Fig. 1 is a plan view showing the relationship between a rotating disk of a two-station type blow molding machine and two stations.

Fig. 2 is a plan view showing the relationship between the rotary disk of the 3-station type blow molding machine and the three stations.

Fig. 3 is a plan view showing the relationship between the rotary disk of the 4-station type blow molding machine and the four stations.

Fig. 4 is a plan view showing the relationship between the rotating disk of the blow molding machine of the 4-station/2-station switching type and the 4 stations/2 stations.

Fig. 5 is a plan view showing a four-station injection stretch blow molding machine.

Fig. 6 is a front view showing the portion of the ejection and extension blow molding of Fig. 5 broken and displayed.

Fig. 7 is a cross-sectional view taken along line IIV-IIV of Fig. 5.

Fig. 8 is a schematic cross-sectional view showing the mold opening of the injection molding station of the two-stage injection blow molding machine.

Fig. 9 is a schematic cross-sectional view showing the mold closing of the injection molding station of the two-stage injection blow molding machine.

Fig. 10 is a schematic cross-sectional view showing a state in which the blow molding station of the two-stage injection blow molding machine is closed.

Fig. 11 is an enlarged view of a portion A of Fig. 10.

Fig. 12 is a schematic cross-sectional view showing the container taken out of the blow molding station of the two-stage injection blow molding machine.

Fig. 13 is a schematic cross-sectional view showing the rotational conveyance of the blow molding station of the two-stage injection blow molding machine.

Fig. 14 is a view showing a core mold cooling station of an injection blow molding machine installed at four stations.

Fig. 15 is a view showing a rotary joint of an injection blow molding machine installed at two stations.

Figure 16 shows the blow molding of the rotary joint and the pipe support member. Side view of the machine.

Figure 17 is a cross-sectional view showing the rotary joint.

Figure 18 is a view showing the housing of the rotary joint.

Figure 19 is a view showing the fixed shaft of the rotary joint.

Fig. 20 is a cross-sectional view of the relay piping portion connected to the lower portion of the rotary joint.

Figure 21 is a cross-sectional view of the housing with independent 6 paths.

Fig. 22 is a front view showing the mold closing of the injection molding station of the injection stretch blow molding machine.

Figure 23 is a front view showing the mold closing of the injection molding station of the injection blow molding machine.

Fig. 24 is a partially enlarged view of Fig. 23.

Fig. 25 is an explanatory view showing a closed mold shown in Fig. 23 in comparison with a comparative example.

Fig. 26 is an enlarged view showing a portion A of the comparative example portion of Fig. 25.

Fig. 27 is an enlarged view showing a portion B of the embodiment of Fig. 25.

Fig. 28 is an enlarged view showing the mounting structure of the transfer die unit.

21‧‧‧ openings

54‧‧‧Lower base

56‧‧‧Upper pedestal

56A‧‧‧ openings

58.62‧‧‧Longitudinal closed-mode mechanism

60‧‧‧Cylinder fixing plate

114‧‧‧Closed plate

116‧‧‧Upper cylinder

118‧‧‧Piston

120‧‧‧lower cylinder

210‧‧‧Transfer components

220‧‧‧2nd shot cavity mode

400‧‧‧pressure block

410‧‧‧ plug

410A‧‧‧Bottom

410B‧‧‧Upper

420‧‧‧ spacer components

L5‧‧‧ size

Claims (15)

A blow molding machine having: a lower base; and an upper base that is movable up and down over the lower base; and a rotary disk rotatably supported by the upper base and a plurality of transfer members are stopped at a plurality of rotation stop positions; and a plurality of processing stations are disposed between the lower base and the upper base, and are disposed in the plurality of rotation stop positions, and the plurality of processing stations The invention comprises at least an injection molding station having an injection mold and a blow molding station having a blow mold, which can be used for injection stretch blow molding by replacing parts including the plurality of transfer members, the injection mold and the blow mold. And a blow molding machine for shooting both sides of the blow molding machine, characterized in that: the injection molding station has a lower cylinder supported by the lower base and driving the upper base up and down; and an upper cylinder , which is supported by the aforementioned upper base and lifts and drives the closed mold disk, and the foregoing plurality of blow molding machines are used for injection and extension blow molding machines. Each of the feeding members includes a first neck mold, and the upper base, the rotating disk, and the closed mold disk are lowered by the lower cylinder at the injection molding station, and the closed mold is fixed after being lowered. The first shot core of the disc is further lowered by the aforementioned upper cylinder, and The first neck mold and the first injection core mold are closed to a first injection cavity mold supported on the lower base side to form a first preform, and the blow molding machine is used for injection blow molding. In the case of the machine, each of the plurality of transfer members includes a transfer die unit having a second neck mold and a second exit core mold, and the upper base, the rotary disk, and the lower cylinder are disposed in the injection molding station The mold closing plate is lowered, and the pressure receiving block fixed to the lowered mold plate is further lowered by the upper cylinder to directly press the transfer mold unit, and the transfer mold unit is closed at the The second injection cavity mold supported on the lower base side to form the second preform. The blow molding machine according to claim 1, wherein the cylinder diameters of the lower cylinder and the upper cylinder are substantially the same, and are set to the same pressure when the mold is closed. The blow molding machine according to claim 2, further comprising a plug rod extending from the lower base to the upper portion, wherein the upper base abuts against the plug rod during the mold closing The closed mold position is supported. The blow molding machine according to claim 3, further comprising: a spacer member interposed between the upper base and the plug rod when the mold is closed, and adjusting the upper base The aforementioned closed mold position. The blow molding machine according to claim 3, wherein a first gap is provided between the pressure receiving block and the opposing surface of the upper base during the mold closing. The blow molding machine according to any one of claims 1 to 4, wherein, when the mold is closed, a second gap is provided between the opposing faces of the upper base and the rotary disk. The blow molding machine according to any one of claims 1 to 4, wherein the first neck mold is constituted by a pair of split molds, and the pair of split molds are fixed along the rotation. The two L-shaped guides of the disc are supported openably and closably, and the transfer mold unit includes a hole through which the flange sleeve can be inserted, and the flanged sleeve includes an attachment hole flange and the attachment hole flange a hollow shaft portion extending, and the length of the hollow shaft portion is longer than the hole, and a bolt inserted through the flanged sleeve is fastened to the rotating disk, thereby being capable of moving the mold unit at the side A predetermined third gap is secured between the rotating disk and the transfer mold unit is locked and coupled between the flange and the rotating disk. The blow molding machine according to any one of claims 1 to 4, wherein, when the blow molding machine is used for an injection blow molding machine, a rotary joint is provided, the transfer mold unit, The first pipe and the second pipe are connected to the rotary joint and the transfer mold unit, and the first pipe supplies a fluid to the passage, and the second pipe discharges the fluid from the passage. The aforementioned rotary joint has the following: a fixed shaft body; and a casing disposed around the fixed shaft body and fixed to the rotating disk, wherein the fixed shaft body includes: a plurality of ring grooves formed on an outer surface; and communicating with the plurality of a first longitudinal hole of one annular groove of the annular groove; and a second longitudinal hole communicating with the other annular groove of the plurality of annular grooves, the casing having a first opening and a second opening, the first The opening portion is connectable to the first pipe and faces the one of the plurality of ring grooves, and the second opening is connectable to the second pipe, and the plurality of ring grooves are further One ring groove is opposite. The blow molding machine according to claim 8, further comprising: a pipe supporting member that supports the first pipe and the second pipe, the pipe supporting member being together with the rotating disk and the rotary joint Lifting. The blow molding machine according to any one of claims 1 to 4, wherein the first preform is used when the blow molding machine is used in the above-described injection stretch blow molding machine The first neck mold is held and transported to the blow molding station by the rotary conveyance of the rotary disk, and is driven by the longitudinal axis of the extension rod and the blow from the blow core mold at the blow molding station. The first preform that is disposed in the first blowing cavity mold that is closed with the first neck mold is biaxially stretched to form a first container, and the blow molding machine is used for the aforementioned When shooting the blow molding machine, The second preform is held by the transfer mold unit and transported to the blow molding station by the rotary conveyance of the rotary disk, and at the blow molding station, by the second injection core mold The second preform is stretched to form a second container by blowing the second preform disposed in the second blowing cavity mold that is closed with the transfer mold unit. The blow molding machine according to claim 10, wherein the rotary disk is intermittently rotationally driven at a rotation angle of 180 degrees, and the plurality of processing stations have first and second positions arranged along a rotation conveyance direction. In the second station, the first station serves as the injection molding station, and the second station can be used as both the blowing station and the take-out station. The blow molding machine according to claim 10, wherein the rotary disk is intermittently rotationally driven at a rotation angle of 90 degrees, and the plurality of processing stations are arranged by the first to the rotational conveyance direction. In the fourth station, when the blow molding machine is used in the above-described injection stretch blow molding machine, the first station serves as the injection molding station, and the second station serves as a preform temperature adjustment station, and the third station becomes In the blow molding station, the fourth station serves as a take-out station, and when the blow molding machine is used in the injection blow molding machine, the first station serves as the injection molding station, and the second station becomes the blow molding. At the station, the third station serves as a take-out station, and the fourth station serves as a cooling station for cooling the second shot core mold. The blow molding machine according to claim 10, wherein the rotary disk is intermittently rotated at a rotation angle of 90 degrees or 180 degrees. The plurality of processing stations are configured by first to fourth stations arranged along the rotational transport direction, and when the blow molding machine is used for the injection/extension blow molding machine, the first station becomes In the injection molding station, the second station is a pre-form temperature adjustment station, the third station is the blow molding station, the fourth station is a take-out station, and the blow molding machine is used for the injection blow molding machine. In this case, the first station serves as the injection molding station, and the third station can be used as both the blowing station and the take-out station, and the rotating disk is not stopped at the second station and the fourth station. The blow molding machine according to claim 10, wherein the rotary disk is intermittently rotationally driven at a rotation angle of 120 degrees, and the plurality of processing stations are first to ten arranged along a rotational conveyance direction. In the third station, when the blow molding machine is used in the above-described injection stretch blow molding machine, the first station serves as the injection molding station, the second station serves as the blow molding station, and the third station becomes When the blow molding machine is used in the above-described injection blow molding machine, the first station serves as the injection molding station, the second station serves as the blow molding station, and the third station serves as a take-out station. The blow molding machine according to claim 10, wherein the blow molding mechanism for laterally closing the blow mold at the blow molding station is used for the injection stretch blow molding machine. And the aforementioned shot Blow out the forming machine.