JP5643847B2 - Blow molding machine - Google Patents

Description

  The present invention relates to a blow molding machine that can be used by switching between an injection stretch blow molding machine and an injection blow molding machine by exchanging mold parts.

  An injection stretch blow molding machine (also referred to as a biaxial stretch blow molding machine) injection-molds a preform and stretches the preform in a biaxial (horizontal axis and vertical axis) direction with a stretching rod and blow air. Is formed (Patent Documents 1 and 2). The injection stretch blow molding machine is suitable for molding a container made of a material that is easy to maintain an appropriate stretching temperature during the molding process and has good stretch characteristics, for example, PET (polyethylene terephthalate). However, injection stretch blow molding machines, such as PE (polyethylene) and PP (polypropylene), have a faster crystallization rate than PET, tend to be below the proper stretching temperature during the molding process, and have poor stretching properties. Not suitable for molding material containers. In the case of manufacturing a thin container made of PE or PP, molding by injection stretch blow becomes more difficult.

  Further, the injection stretch blow molding machine of Patent Document 1 is equipped with a heating (temperature control) stage. The heating (temperature control) stage has significant advantages such as optimizing an unfavorable thermal history generated in the preform after injection molding, and forming a bottle having a more complicated shape by locally heating the preform. However, in small containers made of PET that do not require much longitudinal stretching, such as eye drop containers, the shape of the container corners cannot be fully produced as a result of the amount of heat retained in the preform being reduced on the heating (temperature control) stage. There was also.

  Therefore, it can be said that an injection blow molding machine is more suitable when using a material such as PE or PP, or when molding a small container that does not require much longitudinal stretching even with PET. The injection blow molding machine performs injection molding of a preform, and conveys the preform from an injection molding station to a blow molding station using an injection core mold. In the blow molding station, a preform is stretched mainly in a uniaxial (horizontal axis) direction only by blow air from an injection core mold to form a container (Patent Document 3).

  Even in the case of forming various types of containers including different materials with a small number of lots produced, conventionally, there has been no choice but to use an injection stretch blow molding machine and an injection blow molding machine.

Japanese Patent Publication No.53-2296 JP 05-77311 A JP 48-44355 A

  Molding small quantities of various types of containers using two blow molding machines with different blow molding methods reflects the cost of the two blow molding machines in the price of the container, so there is a limit in reducing the cost of the container . The installation area of the factory where the two blow molding machines are arranged is increased, and the maintenance cost of the two blow molding machines is reflected in the price of the container. In addition, if two blow molding machines are used separately for high-mix low-volume production, the operation rate of each one blow molding machine is low, which is not efficient.

  Some aspects of the present invention provide a versatile blow molding machine that can be used by switching between an injection stretch blow molding machine and an injection blow molding machine by exchanging parts.

  Some other aspects of the present invention provide a blow molding machine capable of preventing a rotating disk from being deformed and causing poor rotation even when switched between an injection stretch blow molding machine and an injection blow molding machine. To do.

One embodiment of the present invention provides:
The lower base,
An upper base that is raised and lowered above the lower base;
A turntable that is rotatably supported by the upper base and stops a plurality of transfer members at a plurality of rotation stop positions;
A plurality of processing stations disposed at the plurality of rotation stop positions in a space between the lower base and the upper base;
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;
A blow molding machine used for both an injection stretch blow molding machine and an injection blow molding machine by exchanging parts including the plurality of transfer members, the injection mold and the blow mold,
The injection molding station
A lower cylinder supported by the lower base and driving the upper base up and down;
An upper cylinder supported by the upper base and driving the mold clamping machine up and down;
Have
When the blow molding machine is used in an injection stretch blow molding machine, each of the plurality of transfer members includes a first neck mold, and at the injection molding station, the upper base and the turntable are driven by the lower cylinder. And a first injection cavity mold supported on the lower base by lowering the first injection core mold fixed to the lowered mold clamping disk by the upper cylinder and lowering the mold clamping disk The first neck mold and the first injection core mold are clamped to form a first preform,
When the blow molding machine is used in an injection blow molding machine, each of the plurality of transfer members includes a transfer mold unit having a second neck mold and a second injection core mold, and at the injection molding station, The transfer mold unit is configured such that the upper base, the rotating disk, and the mold clamping disk are lowered from the lower cylinder, and a pressure receiving block fixed to the lowered mold clamping disk is further lowered by the upper cylinder. The present invention relates to a blow molding machine that directly presses and molds a second preform by clamping the transfer mold unit to a second injection cavity mold supported on the lower base side.

  According to one aspect of the present invention, a lower base, an upper base, a rotating disk, and a plurality of processing stations of one blow molding machine are used both as an injection stretch blow molding machine and an injection blow molding machine. In order to perform these two types of blow molding, at least an injection molding station and a blow molding station are provided, and a plurality of transfer members supported by a rotating disk and parts including molds arranged at each station are exchanged. It ’s fine. Part replacement is an operation normally performed for each specification of a container to be molded. In one embodiment of the present invention, the model change of the blow molding machine can be practically performed by part replacement.

  The use of a plurality of transfer members that are rotated and conveyed by a turntable is also common to the two types of blow molding in conveying preforms and containers. In the injection stretch blow molding machine, the transfer member includes a first neck mold, and the preform is conveyed by the first neck mold. In injection stretch blow molding, the first injection core mold may be raised and lowered only at the injection molding station. In injection blow molding, the transfer member is a transfer mold unit having a second neck mold and a second injection core mold. If the transfer mold unit is conveyed by the rotating disk, blow air can be supplied from the second injection core mold into the preform at the blow molding station.

  Here, the upper cylinder is used to raise and lower the first injection core mold in the injection stretch blow molding machine, and to move the transfer mold including the second injection core mold together with the upper base and the turntable. It is essentially unnecessary with a blow molding machine. In the injection blow molding machine, the lower cylinder can pull the upper base without using the upper cylinder, and the transfer mold unit can be clamped via the turntable by the upper base. However, if it does so, there exists a possibility that a mold clamping force may act on a rotating disk between an upper base | substrate and a transfer mold unit, and a rotating disk may deform | transform. The deformation of the rotating disk becomes an obstacle when being driven to rotate with respect to the upper base, resulting in abnormal noise and rotation failure.

  In one aspect of the present invention, the pressure receiving block is fixed to the mold clamping disk driven by the lower cylinder, and the pressure receiving block directly presses the transfer mold unit. Therefore, it is possible to prevent defects during rotation due to the deformation of the rotating disk.

  In one aspect of the present invention, the lower cylinder and the upper cylinder have substantially the same cylinder inner diameter and can be set to the same pressure during mold clamping.

  If the lower cylinder and the upper cylinder have the same pressure, if the inner diameters of both cylinders are substantially the same, the force of the lower cylinder is offset by 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 clamping disk driven by an upper cylinder, and this pressure receiving block directly presses the transfer mold unit. Therefore, the mold clamping force does not act on the upper base and the turntable during mold clamping, and deformation of the turntable is prevented. In the injection stretch blow molding machine, since the first injection core mold is fixed to the mold clamping machine driven by the upper cylinder, the mold clamping force does not act on the upper base or the rotating disk during mold clamping.

  In one aspect of the present invention, it further includes a stopper rod extending upward from the lower base, and the upper base can be in contact with the stopper rod and supported at the mold clamping position during the mold clamping.

  When the upper base pressed by the lower cylinder is clamped, the force of the lower cylinder is balanced with the reaction force of the upper cylinder, and the pressing force is released. At that time, the upper base comes into contact with the stopper rod and is supported at the clamping position. Therefore, the height position of the upper base at the time of mold clamping is uniquely determined, and the rotating base is not deformed by pressing the rotating base due to the weight of the upper base.

  In one aspect of the present invention, it may further include a sbaser member that is interposed between the upper base and the stopper rod during the mold clamping and adjusts the mold clamping position of the upper base.

  The space between the upper base and the lower base at the time of mold clamping may vary depending on the difference in height size between the first injection core mold and the transfer mold unit and the length of the molded product. The distance between the upper base and the lower base at the time of mold clamping can be easily adjusted by changing the mold clamping position of the upper base by changing the presence or absence of the sbaser member or the thickness of the sbaser member.

  In one aspect of the present invention, a first clearance can be provided between opposing surfaces of the pressure receiving block and the upper base during the mold clamping.

  The pressure receiving block is stopped at a position in close contact with the clamped transfer mold unit, and the upper base mold clamping position determined by the stopper rod without being affected by the pressure receiving block is adjusted, so that the pressure receiving block and the upper A first clearance can be ensured between the surfaces facing the base. Thereby, it is ensured that the pressure from the pressure receiving block does not act on the upper base, and it is possible to prevent the turntable from being deformed via the upper base.

  In one aspect of the present invention, a second clearance can be provided between the opposing surfaces of the upper base and the turntable during the mold clamping.

  It is designed so that a clearance is secured between the opposing surfaces of the upper base and the turntable when the turntable is rotated and conveyed. The force of the pressure receiving block is not transmitted to the upper base, and the upper base is supported by its own weight by the stopper rod, so that the same clearance as that during the rotation conveyance can be ensured between the opposing surfaces of the upper base and the rotating disk.

  In one aspect of the present invention, the first neck mold is constituted by a pair of split molds, and the pair of split molds are supported so as to be openable and closable along two L-shaped guides fixed to the rotating disk, The transfer mold unit includes a hole through which a flanged sleeve is inserted, and the flanged sleeve includes a holed flange and a hollow shaft part extending from the holed flange, and the length of the hollow shaft part is A bolt that is formed longer than the hole and is inserted into the flanged sleeve is fastened to the rotating plate to secure the third clearance between the transferring mold unit and the rotating plate, while the transfer is performed. A mold unit can be fastened between the flange and the turntable.

  Since the first neck type is supported by the turntable so that it can be opened and closed by the split mold structure, the turntable having relatively low rigidity is not deformed. On the other hand, the transfer mold unit can be bolted to the turntable. As described above, when the transfer mold unit is bolted to the rotating disk, the rotating disk having low rigidity may be deformed by tightening. The flanged sleeve fastens the transfer mold unit between the flange and the turntable while ensuring a certain third clearance between the transfer mold unit and the turntable. Therefore, only the fastening force acting on the flange area acts on the rotating disk, the load on the rotating disk is reduced, and deformation of the rotating disk is suppressed. Moreover, it becomes easy to ensure a 3rd clearance between the opposing surfaces of a turntable and an 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 further provided,
The transfer mold unit includes a passage,
First piping and second piping connected to the rotary joint and the transfer mold unit are further provided, the first piping supplies fluid to the passage, and the second piping supplies the fluid from the passage. Discharge,
The rotary joint is
A fixed shaft,
A housing disposed around the fixed shaft and fixed to the turntable;
Have
The fixed shaft body communicates with a plurality of circumferential grooves formed on an outer surface, a first vertical hole communicated with one of the plurality of circumferential grooves, and another one of the plurality of circumferential grooves. Including a second longitudinal hole,
The housing is connected to the first pipe, the first opening facing the one of the plurality of circumferential grooves, and the second pipe is connected to the other one of the plurality of circumferential grooves. A second opening.

  If it carries out like this, a fluid, for example, a temperature control medium, blow air, etc. can be sucked and discharged by the transfer die unit rotated with a turntable via a rotary joint. In particular, the housing connected to the transfer mold unit via the first and second pipes rotates together with the turntable, so that the relative positional relationship between the housing and the transfer mold unit remains unchanged. Therefore, the first and second pipes are not twisted and broken with the rotation of the turntable. The blow molding machine having the rotary joint can be applied not only to a dual-purpose machine but also to a dedicated machine as an injection blow molding machine.

  In one mode of the present invention, it further has a piping support member which supports the 1st piping and the 2nd piping, and the piping support member can go up and down with the turntable and the rotary joint.

  This eliminates the need to redundantly route the piping connecting the rotary join and the outside.

Another aspect of the present invention is:
The lower base,
An upper base that is raised and lowered above the lower base;
A turntable that is rotatably supported by the upper base and stops a plurality of transfer members at a plurality of rotation stop positions;
A plurality of processing stations disposed at the plurality of rotation stop positions in a space between the lower base and the upper base;
A vertical clamping mechanism for raising and lowering the upper base;
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,
By replacing the parts including the plurality of transfer members, the injection mold and the blow mold, the blow molding machine is used for both an injection stretch blow molding machine and an injection blow molding machine,
When the blow molding machine is used in an injection stretch blow molding machine, each of the plurality of transfer members includes a first neck mold, and is clamped with the first neck mold at the injection molding station. A first preform is molded using an injection core mold and a first injection cavity mold, and the first preform is held by the first neck mold and conveyed to the blow molding station by rotational conveyance of the rotating disk, The first preform disposed in the first blow cavity mold clamped to the first neck mold at the blow molding station is biaxially driven by a longitudinal axis drive of the stretching rod and blow air from the blow core mold. Stretch direction and blow mold the first container,
When the blow molding machine is used in an injection blow molding machine, each of the plurality of transfer members includes a transfer mold unit having a second neck mold and a second injection core mold, and at the injection molding station, A second preform is molded using a transfer mold unit and a second injection cavity mold to be clamped, and the second preform is held by the transfer mold unit, and the blow molding is performed by rotational conveyance of the rotating disk. The second preform placed in a second blow cavity mold that is transported to the station and clamped with the transfer mold unit at the blow molding station is stretched by blow air from the second injection core mold Then, the second container is blow-molded.

  In another aspect of the present invention, as in the case of the first aspect of the present invention, the lower base, the upper base, the turntable, and the plurality of processing stations of one blow molding machine are formed by injection stretch blow molding only by exchanging a mold or the like. It is used for both machine and injection blow molding machine. In addition, according to the shape of the first container blow-molded by an injection stretch blow molding machine, the injection molding station includes a first injection cavity mold, the blow molding station includes a first blow cavity mold, a blow core mold, and the like. A stretching rod is placed. In the case of an injection blow molding machine, the second blow cavity mold is arranged instead of the first blow cavity mold in accordance with the shape of the second container to be blow molded, and the blow core mold and the stretching rod are not used. .

  In another aspect of the present invention, the rotating disk is intermittently driven at a rotation angle of 180 degrees, and the plurality of processing stations include first and second stations arranged along a rotation conveyance direction, and the first The station becomes the injection molding station, and the second station can be used as both the blow molding station and the take-out station.

  If comprised in this way, a blow molding machine can be comprised only with two stations, the injection molding station and blow molding station indispensable to an injection stretch blow molding machine and an injection blow molding machine.

  In another aspect of the present invention, the rotating disk is intermittently driven at a rotation angle of 90 degrees, and the plurality of processing stations include first to fourth stations arranged along a rotation conveyance direction, and the blow molding When the machine is used in an injection stretch blow molding machine, the first station becomes the injection molding station, the second station becomes a preform temperature control station, the third station becomes the blow molding station, and the first station When 4 stations are taken out and the blow molding machine is used as an injection blow molding machine, the first station is the injection molding station, the second station is the blow molding station, and the third station is The take-out station The station may be a cooling station for cooling said second injection core mold.

  When configured in this way, the injection stretch blow molding machine has a temperature control station, so that the preform that retains the heat during injection molding can be readjusted to a temperature and temperature distribution suitable for blow molding, and the blow molding quality can be improved. Can do. In addition, by providing the take-out station separately from the blow molding station, it is sufficient to drop the molded container at the take-out station, whether it is an injection stretch blow molding machine or an injection blow molding machine. A simple take-out device becomes unnecessary. Furthermore, in the injection blow molding machine, the second injection core mold that is exposed after the container is taken out can be cooled. Thus, the second injection core mold need not allow the temperature control medium to pass therethrough. When the second container to be injection blow molded is a narrow mouth container, the core pin of the second injection core type can be formed with a solid rod without a temperature control medium passage, and the core pin diameter is reduced to, for example, 8 mm or less, It is possible to match the aperture.

  In another aspect of the present invention, the rotating disk is intermittently driven at a rotation angle of 90 degrees or 180 degrees, and the plurality of processing stations include first to fourth stations arranged along the rotation conveyance direction, When the blow molding machine is used as an injection stretch blow molding machine, the first station is the injection molding station, the second station is a preform temperature control station, and the third station is the blow molding station. When the fourth station serves as a take-out station and the blow molding machine is used as an injection blow molding machine, the first station serves as the injection molding station, and the third station serves as the blow molding station and the take-out station. And the second stay ® The emission and the fourth station may be so as not to stop the rotating disk.

  With this configuration, the injection stretch blow molding machine has four stations, so that the blow molding quality can be improved as described above, while the injection blow molding machine has two stations to reduce the number of parts. Manufacturing cost can be reduced.

  In another aspect of the present invention, the rotating disk is intermittently driven at a rotation angle of 120 degrees, and the plurality of processing stations include first to third stations arranged along a rotation conveyance direction, and the blow molding When the machine is used in an injection stretch blow molding machine, the first station becomes the injection molding station, the second station becomes the blow molding station, the third station becomes a take-out station, and the blow molding machine When used in an injection blow molding machine, the first station can be the injection molding station, the second station can be the blow molding station, and the third station can be the take-out station.

  With this configuration, by providing the take-out station separately from the blow molding station, it is sufficient to drop the molded container at the take-off station, whether it is an injection stretch blow molding machine or an injection blow molding machine. No special take-out device is required for carrying it out.

  In another aspect of the present invention, a blow mold clamping mechanism for laterally clamping the blow mold at the blow molding station can be used for both 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 between the injection stretch blow molding machine and the injection blow molding machine, the blow mold clamping mechanism can be fixed to the machine base and shared by both models.

FIG. 1 is a plan view showing the relationship between a rotary 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 three-station type blow molding machine and the three stations. FIG. 3 is a plan view showing the relationship between the rotary station of the four-station type blow molding machine and the four stations. FIG. 4 is a plan view showing the relationship between the rotary station of a 4 station / 2 station switching type blow molding machine and the 4 station / 2 station. FIG. 5 is a plan view showing a four-station injection stretch blow molding machine. FIG. 6 is a front view showing a part of the injection stretch blow molding machine of FIG. 7 is a cross-sectional view taken along the line IIV-IIV in FIG. FIG. 8 is a schematic cross-sectional view of the injection molding station provided in the two-station injection blow molding machine when the mold is opened. FIG. 9 is a schematic cross-sectional view at the time of mold clamping of an injection molding station of a two-station injection blow molding machine. FIG. 10 is a schematic cross-sectional view of a blow molding station provided in a two-station injection blow molding machine at the time of mold clamping. FIG. 11 is an enlarged view of a portion A in FIG. FIG. 12 is a schematic cross-sectional view of the blow molding station provided in the two-station injection blow molding machine when the container is taken out. FIG. 13 is a schematic cross-sectional view of a blow molding station provided in a two-station injection blow molding machine during rotational conveyance. FIG. 14 is a view showing a core cooling station provided in a four-station injection blow molding machine. FIG. 15 is a view showing a rotary joint provided in a two-station injection blow molding machine. FIG. 16 is a side view of the blow molding machine showing the rotary joint and the pipe support member. FIG. 17 is a cross-sectional view of the rotary joint. FIG. 18 is a view showing a housing of the rotary joint. FIG. 19 is a diagram illustrating a fixed shaft body of the rotary joint. FIG. 20 is a cross-sectional view of the relay pipe connected to the lower part of the rotary joint. FIG. 21 is a cross-sectional view of a housing having six independent paths. FIG. 22 is a front view showing mold clamping at an injection molding station of an injection stretch blow molding machine. FIG. 23 is a front view showing mold clamping at an injection molding station of an injection blow molding machine. 24 is a partially enlarged view of FIG. FIG. 25 is an explanatory view showing the mold clamping shown in FIG. 23 in comparison with the comparative example. FIG. 26 is an enlarged view of a portion A showing a comparative example portion of FIG. FIG. 27 is an enlarged view of part B showing the embodiment part of FIG. FIG. 28 is an enlarged view showing the mounting structure of the transfer mold unit.

1. Types of Blow Molding Machines A two-station, three-station, and four-station rotary conveyance type blow molding machine according to the present invention is shown in FIGS. 1 to 4 schematically show processing stations 1 </ b> A to 4 </ b> D arranged at a plurality of rotation stop positions at a predetermined rotation angle of the turntable 20. Any one of the blow molding machines shown in FIGS. 1 to 4 is also used as an injection stretch blow molding machine STR and an injection blow molding machine INJ.

  The turntable 20 has openings 21 to 24 that allow passage of components arranged facing the processing station or prevent interference with the components. FIG. 1 shows a two-station type. FIG. 2 shows a three station type. 3 and 4 show the 4-station type. 2 does not need the openings 22 and 24 at the two locations indicated by the broken lines, but has the openings 22 and 24 to be used together with the station type of FIGS. You may do it. However, if the turntable 20 dedicated to two stations in FIG. 1 is used, the radius of the turntable 20 can be minimized. The radii of the rotary stations 20 of 2 stations, 3 stations and 4 stations are D1, D2 and D3, respectively. When the dedicated rotary disk 20 is used for each of the second station, the third station, and the fourth station, D1 <D2 <D3. This is because as the number of stations is smaller, interference does not occur even if adjacent stations are arranged closer to each other. On the other hand, if the rotating disk 20 is shared by the 2nd station, the 3rd station and the 4th station, D1 = D2 = D3.

  In the two-station type shown in FIG. 1, two processing stations arranged at two rotation stop positions at a rotation angle of 180 degrees of the turntable 20 are an injection molding station (first station) 1A and a blow molding station (second molding station). Station) 2A. When the blow molding machine is used for either the injection stretch blow molding machine STR or the injection blow molding machine INJ, the preform is injection molded at the injection molding station 1A, and the preform is blow molded into a container at the blow molding station 2A. The blow molding station 2A is also used as a take-out station for taking out containers from the molding machine.

  In the three-station type shown in FIG. 2, three processing stations arranged at three rotation stop positions at a rotation angle of 120 degrees of the turntable 20 are an injection molding station (first station) 1B and a blow molding station (first 2 station) 2B and a take-out station (third station) 3B. Unlike FIG. 1, the take-out station 3B is arranged separately from the blow molding station 2B. When the blow molding machine is used as the injection blow molding machine INJ, the third station 3B in FIG. 3 may also serve as a cooling station for cooling the injection core mold that is exposed after the container is taken out.

  In the 4-station type shown in FIG. 3, four processing stations 1 </ b> C to 4 </ b> C are provided that are arranged at four rotation stop positions at a rotation angle of 90 degrees of the turntable 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 control 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, the first station 1C is an injection molding station, and the third station is a blow molding station. In this case, the second and fourth stations 2C and 4C are not used. Therefore, when the blow molding machine is used as the injection blow molding machine INJ, the turntable 20 may be stopped at two stop positions with a rotation angle of 180 degrees as in FIG.

  In the 4-station type shown in FIG. 4, unlike the case of FIG. 3, even if the blow molding machine is used for either the injection stretch blow molding machine STR or the injection blow molding machine INJ, all of the first to fourth stations 1C to 4C are used. used. When the blow molding machine is used as the injection stretch blow molding machine STR, the first to fourth stations 1A to 4D are the same as the first to fourth stations 1C to 4C of FIG. When the blow molding machine is used as an injection blow molding machine INJ, the first station 1D is an injection molding station, the second station 2D is a blow molding station, the third station 3D is a take-out station, and the fourth station 4D is an injection core type. It becomes a cooling station.

  In this way, the present invention combines a single blow molding machine with the injection stretch blow molding machine STR and the injection blow molding machine INJ, thereby reducing the molding cost of containers produced in a variety of small quantities. It is.

2. 4-station / 2-station switching type blow molding machine 2.1. 4-Station Injection Stretch Blow Molding Machine First, Japanese Patent No. 3722671 using the 4-station blow molding machine shown in FIG. 3 as an injection stretch blow molding machine will be described with reference to FIGS.

  As shown in FIGS. 6 and 7, the four-station injection stretch blow molding apparatus 50 includes a machine base 52, a lower base 54, an upper base 56, a traction plate 58, and a cylinder fixing plate 60. The upper base 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 base 52 has a box shape with an internal cavity, and has an injection device 64 attached to one side of the upper surface thereof. The lower base 54 is fixed to the upper surface of the other side of the machine base 52. The upper base 56 is disposed above the lower base 54 with a predetermined distance from the lower base 54, and rotatably supports a rotating disk 66 (the rotating disk 20 in FIG. 3) on the lower surface side.

  Further, the upper base 56 is connected and fixed to a midway position between the two tie bars 62 on the injection device 64 side and the upper ends of the two tie bars 62 on the opposite side to the injection device 64.

  A plurality of processing stations 1 </ b> C to 4 </ b> C shown in FIG. 3 are arranged in a space between the lower base 54 and the upper base 56 on the machine base 52 and at a plurality of rotation stop positions of the turntable 66. As shown in FIG. 5, an injection molding station 68 (corresponding to 1C in FIG. 3) on the injection device 64 side, a blow molding station 70 (corresponding to 3C in FIG. 3) at the opposite position, an injection molding station 68 and a blow molding station. A temperature control station 72 (corresponding to 2C in FIG. 3) and a take-out station 74 (corresponding to 4C in FIG. 3) are provided at positions intersecting 70 and 90 degrees.

  In the injection molding station 68, as shown in FIG. 6, an injection cavity mold (first injection cavity mold) 78 is attached on the lower base 54 via a hot runner mold 76 that is in nozzle touch with the injection device 64.

  As shown in FIG. 6, the blow molding station 70 includes a blow cavity mold (first blow cavity mold) 84 formed of a split mold that can be clamped by a blow mold clamping mechanism 82 including a blow mold clamping cylinder 80. It is provided on the lower base 54.

  In the temperature control station 72, a temperature control pot 86 is fixed on the lower base 54 as shown in FIG.

  At the take-out station 74, as shown in FIG. 7, a shooter 88 for taking out the molded product is attached on the lower base 54 (not shown in FIG. 6).

  In addition, a plurality of, for example, two neck types (first neck type) are provided on the lower surface of the turntable 66 corresponding to the positions of the injection molding station 68, the temperature control station 72, the blow molding station 70, and the take-out station 74, respectively. ) 90 is provided.

  The neck mold 90 is constituted by a split mold, and each of the split molds is attached to a neck support plate 92 made of a divided plate, and the neck mold 90 can be opened and closed by opening and closing the neck support plate 92. In the injection stretch blow molding machine 50, the neck mold 90 and the neck support plate 92 that supports the neck mold 90 so as to be openable and closable constitute a transfer member held by the rotating disk 66.

  Further, the turntable 66 can be intermittently rotated 90 degrees by an electric motor 94 provided on the upper base 56, and the neck mold 90 is transferred to the injection molding station 68, the temperature control station 72, the blow molding station 70, and the take-out station 74. And can be sequentially conveyed.

  The rotation stop position of the rotary disk 66 is positioned by the positioning mechanism 96, but only the positioning means of the servo motor may be used.

  Further, on the upper base 56, a temperature control core lifting cylinder 98 that moves up and down a temperature control core (not shown) at a position corresponding to the temperature control station 72, and a blow core type lift cylinder 102 that lifts and lowers the blow core mold 100 at a position corresponding to the blow molding station 70. Further, a stretching rod lifting cylinder 106 that lifts and lowers the stretching rod 104, an ejection cam lifting cylinder 110 that lifts and lowers an ejection cam 108 for opening the neck support plate 92 at a position corresponding to the take-out station 74, and the like are provided.

  The cylinder fixing plate 60 is fixed to the upper ends of two tie bars 62 located on the injection molding station 68 side above the upper base 56, and the injection core mold 112 is interposed between the cylinder fixing plate 60 and the upper base 56. An injection core mold clamping plate (clamping machine in a broad sense) 114 to which is attached is attached along the two tie bars 62 so as to be movable up and down. Although a cooling medium is circulated through the injection core mold 112, a cooling medium circulation device is omitted.

  An injection core mold clamping cylinder (upper cylinder in a broad sense) 116 is attached on the cylinder fixing plate 60, and the tip of the piston 118 of the injection core mold clamping cylinder 116 is attached to the injection core mold clamping plate 114. It is connected.

  The traction plate 58 is connected and fixed to the lower ends of the four tie bars 62 in the machine base 52. A neck mold clamping cylinder (lower cylinder in a broad sense) 120 as a saddle mold clamping means is attached to the traction plate 58 at a position below the injection molding station 68, and a piston 122 of the neck mold clamping cylinder 120 is disposed at the lower part. It is connected to the lower surface of the base 54. The saddle type clamping mechanism of the upper base 56 includes a traction plate 58, a tie bar 62, and a cylinder 120.

  Accordingly, as shown in FIG. 7, when the neck mold clamping cylinder 120 is driven in a state where the traction plate 58 is raised, the tie bar 62 is pulled down and connected to the tie bar 62 as the traction plate 58 is lowered. As shown in FIG. 6, the fixed upper base 56 is lowered by the stroke L 1, and the neck mold 90 attached to the turntable 66 is lowered. For example, at the injection molding station 68, the injection mold 68 The neck mold 90 is clamped.

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

  Further, in the temperature control station 72 and the blow molding station 70, the blow cavity mold 84 is clamped by the temperature control pot 86 and the blow mold clamping mechanism 82 with respect to the neck mold 90.

  When the upper base 56 is lowered, the cylinder fixing plate 60 fixed to the upper ends of the two tie bars 62 on the injection molding station 68 side is simultaneously lowered by the same stroke L1 as the upper base 56.

  In this state, in the injection molding station 68, the injection core mold clamping plate 114 is lowered by the stroke L2 by driving the injection core mold clamping cylinder 116, whereby the injection core mold 112 and the neck mold 90 are clamped. The preform (first preform) 124 is injection-molded by injecting molten resin into the injection cavity mold 78 from the injection device 64.

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

  Therefore, the lowering stroke L2 of the injection core mold clamping cylinder 116 is the minimum stroke from the position where the injection core mold 112 is retracted from the turntable 66 to the mold clamping position. Can be shortened.

  In addition, since the injection core mold clamping cylinder 116 only needs to have a clamping force sufficient to clamp the injection core mold 112, the injection core mold clamping cylinder 116 can be made relatively small.

  Here, at the same time as the molding operation of the injection molding station 68, the temperature control station 72 inserts a temperature control core (not shown) into the temperature control pot 86 by the temperature control core lifting cylinder 98 to control the temperature of the preform 124. I do.

  In the blow molding station 70, the blow core mold 100 is lowered by the blow core mold lifting cylinder 102, the blow core mold 100 is clamped with respect to the neck mold 90, and the stretching rod 104 is lowered by the stretching rod lifting cylinder 106. A preform (temperature controlled) by supplying blow air into the cavity mold 84 is biaxially stretched and blown to form a bottle (first container) 126.

  Further, at the take-out station 74, the eject cam elevating cylinder 110 lowers the eject cam 108 to open the neck mold 90 via the neck support plate 92, the bottle 126 is dropped, and the shooter 88 discharges the bottle 126 out of the apparatus. Like to do. In addition, the neck mold | type 90 is made into the mold-clamping state because a pair of division board which comprises the neck support plate 92 is always set to a closed state with a spring. Further, the pair of split plates are provided with wedge holes (not shown) at both ends in the longitudinal direction. The opening of the neck mold 90 is performed by lowering the eject cam 108 driven by the eject cam raising / lowering cylinder 110 toward the wedge hole and driving the dividing plate to open.

  Next, after completion of each molding step, the blow cavity mold 84 is opened by the blow mold clamping mechanism 82, the upper base 56 is raised by the neck mold clamping cylinder 120, and the injection core mold clamping cylinder 116 and the temperature control core are moved up and down. The injection core mold 112, the temperature control core, the blow core mold 100, the stretching rod 104, and the eject cam 108 are retracted from the position of the rotary disk 66 by the cylinder 98, the blow core type lifting cylinder 102, the stretching rod lifting cylinder 106, and the eject cam lifting cylinder 110. Then, the turntable 66 can be rotated.

  In this state, the rotating plate 66 can be intermittently rotated by the electric motor 94 to sequentially perform processing at each processing station.

  Further, an auxiliary mold clamping cylinder 128 is provided below the blow molding station 70 of the traction plate 58, and the tip of a piston (not shown) of the auxiliary mold clamping cylinder 128 is connected to the lower base 54, and an injection molding station. The up and down movement of the upper base 56 on the 68 side and the blow molding station 70 side is balanced so that the up and down can be performed smoothly.

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

  The synchronization means 130 includes two racks 132 that are respectively suspended from the lower base 54 on the injection molding station 68 side and the blow molding station 70 side, and between the injection molding station 68 and the blow molding station 70 on the traction plate 58. And two pinions 136 that are fixed to the rotation shaft 134 and mesh with the racks 132. The injection molding station 68 is also provided with a stopper rod 140 for assisting in restricting the lowering limit of the upper base 56.

2.2. Two-Station Injection Blow Molding Machine A two-station type injection blow molding machine 200 that can be switched by exchanging parts using the basic structure of a four-station injection stretch blow molding machine 50 shown in FIGS. 11 will be described.

  In the two-station injection blow molding machine 200, the temperature control station 72 (2C) and the take-out station 74 (4C) of the four-station injection stretch blow molding machine 50 are not used, and the preform or the second for supporting the preform is used. Only the injection core mold passes. Since the second injection core mold rises when the mold is opened, it does not interfere with the temperature control station 72 (2C) and the extraction station 74 (4C) when moving to the blow molding station. . However, when there is a member that interferes with the temperature control medium of the second injection core type or the air supply pipe (for example, a temperature control pot), it is necessary to remove it.

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

2.2.1 Injection Molding Station First, the injection molding station 201 (1C) of the injection blow molding machine 200 will be described with reference to FIGS.

  First, in the turntable 66 (20) shown in FIGS. 8 and 9, a transfer member (transfer mold) for injection blow is used instead of the transfer member constituted by the neck mold 90 and the neck support plate 92 shown in FIG. Unit) 210 is attached. The transfer member 210 includes, for example, a second neck mold 211 having a pair of split molds, an injection core mold 212, a neck mold fixing plate 213, a neck mold pressing plate 214, a core fixing plate 215, a core pressing plate 216, and a heat insulating member. A plate 217 can be included. The neck type fixing plate 213 includes a pair of divided plates, and a pair of second neck types 211 are fixed thereto. Although not shown, the neck type fixing plate 213 is provided with a passage for a cooling medium. The neck-type pressing plate 214 guides opening and closing the divided plates of the neck-type fixing plate 213. The neck-type presser plate 214 is urged upward by a spring (not shown) so as to be in close contact with the core fixing plate 215 at all times. Thereby, the clamping state of the injection core mold 212 and the neck mold 211 is set. The injection core mold 212 is held by the core pressing plate 216 and the core fixing plate 215. A temperature control medium supply / discharge passage 216A is formed in the core holding plate 216, and a blow air supply passage 215A is formed in the core fixing plate 215. Here, either one of the core fixing plate 215 and the core holding plate 216 may be provided with a temperature adjusting medium supply / discharge passage and a blow air supply passage. Details of the injection core mold 212 will be described later with reference to FIG.

  Also in the injection molding station 201 (1C) of the injection blow molding machine 200, the hot runner mold 76 that makes nozzle touch with the injection device 64 is fixed to the lower base 54 and can be shared with the injection stretch blow molding machine 50. On the hot runner mold 76, the second injection cavity mold 220 of the injection blow molding machine 200 is mounted.

  Here, FIG. 8 shows a mold opening state in which the upper base 56 is at the upper limit position, as in FIG. 7, and FIG. 9 shows a mold clamping state in which the upper base 56 is in 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 with one blow molding machine, the following It is necessary to meet the requirements. First, the dimensions L3 and L4 at the time of mold opening shown in FIGS. 7 and 8 are the same in FIGS. Next, the dimension L5 at the time of mold clamping shown in FIGS. 6 and 9 is the same in FIGS.

  The dimension L4 is a distance from the lower surface of the upper base 56 (the upper surface of the turntable 66) to the upper surface of the lower base 54 when the mold is opened. The dimension L5 is a distance between the lower surface of the upper base 56 (the upper surface of the turntable 66) and the upper surface of the lower base 54 during mold clamping. 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 vertical mold clamping mechanisms 58, 62, and 120 are shared, the dimension L4 is determined by 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. L5 is the same. These dimensions L4 and L5 apply to all the processing stations and have the same restrictions at the blow molding station. In this embodiment, since the hot runner mold 76 is shared, the distance L3 between the lower surface of the upper base 56 (the upper surface of the turntable 66) and the upper surface of the hot runner mold 76 when the mold is opened is also shown in FIGS. It will be the same. In addition, with the upper base 56 opened, the first preform 124 in FIG. 7 and the second preform 205 in FIG. 8 are completely separated from the respective injection cavity molds 78 and 220 and are rotated and conveyed. Is possible. That is, the lengths of the body portions of the first and second preforms 124 and 205 (full length−the length of the neck portion) are smaller than the movement stroke L1 of the upper base 56. However, depending on the model, L5 <L4 may be set.

  Here, the thickness of the transfer member 210 shown in FIGS. 8 and 9 is larger than that of the transfer member composed of the neck mold 90 and the neck support plate 92 shown in FIG. Therefore, it is necessary to determine the dimensions L3 to L5 in consideration of the difference in thickness between the transfer members of both models. At this time, the first container 126 formed by the injection stretch blow molding machine 50 is stretched also in the vertical axis by a beverage bottle or the like, so that the total height is large. On the other hand, the second container molded by the injection blow molding machine 200 is a medicine bottle, a cosmetic container, a lactic acid beverage container, a light bulb cover, etc., and the overall height is smaller than the first container 126. Therefore, if the dimensions L3 to L5 are determined based on the total height of the first container molded by the injection stretch blow molding machine 50 and the first preform 124 therefor, the injection blow molding machine 200 satisfies the dimensions L3 to L5. It is possible.

  In the injection molding station 201 (1C) of the injection blow molding machine 200, the injection core mold clamping cylinder 116 shown in FIG. 6 and the injection core mold clamping plate 114 connected to the piston 118 are not used. Is also possible. These members do not have to be removed as long as there is no hindrance to the injection molding operation or the rotation conveyance operation at the injection molding station 201 (1C). Alternatively, a pressing (pressure receiving) block may be installed on the injection core mold clamping plate 114 instead of the injection core mold, and the injection core mold clamping plate 114 may be moved up and down by the injection core mold clamping cylinder 116. This point will be described later with reference to FIGS.

2.2.2. Blow Molding Station FIGS. 10, 12 and 13 show the mold clamping state at the blow molding station 202 (3C) of the injection blow molding machine 200. FIG. FIG. 11 is an enlarged view of part A of FIG. 10 and shows details of the injection core mold 212. In the blow molding station 202 (3C), a second blow cavity mold 230 including a pair of split molds is disposed. A pair of split molds of the second blow cavity mold 230 is attached to a blow mold clamping mechanism 82 shown in FIG. The bottom mold 232 shown in FIG. 10 is opened and closed integrally with one of the pair of split molds constituting the second blow cavity mold 230.

  The transfer member 210, which is opened at the injection molding station 201 (1C) shown in FIG. 8 and supports the second preform 205, is carried into the blow molding station 202 (3C) by a 180 degree rotation of the turntable 66 (20). Is done. Thereafter, the upper base 56 is lowered, and the second blow cavity mold 230 is laterally clamped by the blow mold clamping mechanism 82 shown in FIG. 6, so that the mold clamping state shown in FIG. 10 is set.

  In the mold clamping state shown in FIG. 10, by introducing blow air from the injection core mold 212 held by the transfer member 210 into the second preform 205, the second preform 205 has the second blow cavity mold 230. It is blow-molded into a second container 206 (see FIG. 12) having a body shape and a bottom shape according to the cavity surface 231. At this time, unlike the injection stretch blow molding machine 50, the stretch rod 104 is not used. The stretching rod 104 of the injection stretch blow molding machine 50 is removed when it interferes with the transfer unit 210. Since the stretching rod 104 is not used, the second preform 205 is stretched in the horizontal axis direction while being hardly stretched in the vertical axis.

  As shown in FIG. 11, the second injection core mold 212 includes a first core pin 212A and a second core pin 212B, and an air flow path 212C and an air outlet are provided between the first core pin 212A and the second core pin 212B. 212D is formed. The air flow path 212C communicates with the blow air supply path 215A shown in FIG. The first core pin 212A has a body shape of the second preform 205, and the upper part thereof is inserted into the second core pin 212B. Further, the first core pin 212A has a hollow shape with the tip closed, and the temperature adjustment medium circulation channel 212E provided in the first core pin 212A communicates with the temperature adjustment medium supply / discharge passage 216A shown in FIG. The second core pin 212 </ b> B has a neck portion inner surface shape of the second preform 205, and an upper outer surface thereof is in contact with the second neck mold 211. The air outlet 212D is formed around the inner surface of the lower end of the neck portion of the second preform 205, and high-pressure blow air is blown out in the blow molding process.

  FIG. 12 shows a process of taking out the second container 206 at the blow molding station 202 (3C). After blow molding, the second blow cavity mold 230 is opened by the blow mold clamping mechanism 82. Thereby, a space in which the neck mold 211, the neck mold fixing plate 213, and the neck pressing plate 214 can descend is secured. Here, a neck lowering cylinder (not shown) for driving the neck pressing plate 214 to descend is disposed on the upper base 56. The driven rod driven by the driving of the cylinder drives the neck pressing plate 214 downward from the lower surface of the core fixing plate 215 against the biasing force of a spring (not shown) and presses the neck fixing plate 213 downward. To do. As a result, the container 6 whose neck is held by the second neck mold 211 is driven to release from the first core pin 212A.

  Thereafter, the split mold constituting the second neck mold 211 is driven to open, and the second container 206 can be released from the neck mold 211. Here, the second neck mold 211 is in a mold-clamping state by the pair of divided plates constituting the neck mold fixing plate 213 being always closed by a spring. Further, the pair of split plates are provided with wedge holes (not shown) at both ends in the longitudinal direction. The mold opening of the second neck mold 211 is performed by lowering the eject cam driven by the eject cam raising / lowering cylinder disposed in the blow molding station 202 (3C) toward the wedge hole and driving the dividing plate to open. The

  Here, after the second blow cavity mold 230 is opened and before the second container 206 is taken out, as shown in FIG. 12, a take-out device (not shown) is driven and the rail member is driven. 240 is drawn below the second container 206. Therefore, the second container 206 dropped from the neck mold 211 is received by the rail member 240. Thereafter, by returning the rail member 240 to the original position, the second container 206 is taken out of the apparatus. The removal of the second container 206 may be an arm member that holds and removes the neck portion of the second container 206 instead of the rail member 240.

  FIG. 13 shows a rotational conveyance process of the transfer member 210 at the blow molding station 202 (3C). In FIG. 13, when the upper base 56 is returned to the upper limit position, the transfer member 210 is raised to a height position at which the first core pin 212 </ b> A does not interfere with the second blow cavity mold 230 and the second injection cavity mold 220. . Therefore, by rotating the turntable 66 (20) in this state, the transfer member 210 can be moved back to the injection molding station 201 (1C).

  In FIG. 13, in preparation for the next blow molding, the second blow cavity mold 230 is moved in the mold closing direction from the mold open state shown in FIG. Thereby, the mold closing time and mold clamping time of the second blow cavity mold 230 are shortened.

  As described above, according to the present embodiment, one blow molding machine can be switched to both the injection stretch blow molding machine 50 and the injection blow molding machine 200 by exchanging the parts, which enables high-mix low-volume production. Appropriate versatility is ensured. In addition, since the injection stretch blow molding has the temperature control station 2C and the dedicated take-out station 1D, the molding cycle for forming a container having high blow quality can be accelerated. In addition, since the injection blow molding machine is 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 Building a 4 station injection stretch blow molding machine with the 4 station type blow molding machine shown in FIG. 4 builds an injection stretch blow molding machine 50 shown in FIGS. Therefore, the description is omitted.

  On the other hand, when a four-station injection blow molding machine is constructed with the four-station type blow molding machine shown in FIG. 4, the injection molding station 1D shown in FIG. 4 matches the injection molding station 1C shown in FIGS. . The blow molding station 2D shown in FIG. 4 corresponds to the blow molding station 3C shown in FIGS. However, the container taking-out process shown in FIG. 12 is not carried out, and the mold opening and the rotary conveyance are carried out while holding the second container 206 on the transfer member 210 shown in FIG.

  In the take-out station 3D shown in FIG. 4, the take-out step of the second container 206 shown in FIG. 12 is performed. However, the second blow cavity mold 230 shown in FIG. 12 does not exist in the take-out station 3D. Further, as members necessary for taking out the second container 206, a cylinder for driving the neck-type presser plate 213 to descend, an eject cam elevating cylinder, etc., need to be arranged in the take-out station 3D.

  The core cooling station 4D shown in FIG. 4 is shown in FIG. As shown in FIG. 14, the transfer member 210 is transported to the core cooling station 3D by the turntable 66 (20) with the first core pin 212A exposed. This is because the second container 206 has already been taken out at the take-out station 3D on the upstream side of the core cooling station 4D.

  In the core cooling station 4D, the core cooling unit 260 is supported by rods 251 of two cylinders 250 fixed to the lower base 54, for example. The core cooling unit 260 has a number of holes 261 large enough to pass through the first core pins 212 </ b> A held by the transfer member 210 so as to match the number of the first core pins 261. A refrigerant supply path 262 is formed in the circumferential direction around the hole 261 as indicated by a broken line. A plurality of refrigerant outlet holes 263 penetrating from the refrigerant supply path 262 toward the inner peripheral surface defining the hole 261 are formed at equal intervals along the circumferential direction of the hole 261.

  When the transfer member 210 is carried into the core cooling station 4D, the core cooling unit 260 stands by at a lower position where it does not interfere with the first core pin 212A. After the transfer member 210 is carried in, the two cylinders 250 are driven to reciprocate the rod 251 along the vertical direction.

  The cooling unit 260 held by the rod 251 reciprocates up and down in a state where the first core pin 212A is inserted into the plurality of holes 261. The first core pin 212A can be cooled by ejecting a refrigerant such as air from the refrigerant ejection hole 213 during the vertical movement. Thus, the first core pin 212A can be sufficiently cooled before returning the transfer member 210 to the injection molding station 1D.

  By disposing the core cooling station 4D, unlike the first injection core mold 90, the second injection core mold 212 does not need to allow the temperature adjusting medium to pass therethrough. Thereby, even if it is a narrow mouth container which accommodates eye drops, mascara, etc., injection blow molding becomes possible. This is because the first core pin 212A of the second injection core mold 212 can be formed of a solid rod without a temperature adjusting medium passage, and the core pin diameter can be reduced to, for example, 8 mm or less to match the diameter of the narrow mouth container. Because. Further, since the temperature control medium supply / discharge passage on the transfer member 210 is not required, the structure of the transfer member 210 is simplified, and the die cost for the transfer member 210 is also reduced.

  As described above, the four-station type blow molding machine shown in FIG. 4 is shown in FIG. 3 in that a narrow-necked container can be injection blow-molded, and because it has a dedicated take-out station 3D, the molding cycle becomes faster. Better than blow molding machines.

4). 3 Station Type Blow Molding Machine The construction of the 3 station injection stretch blow molding machine with the 3 station type blow molding machine shown in FIG. 2 is controlled by the temperature control from the injection stretch blow molding machine 50 shown in FIGS. The station 2C may be deleted and intermittent rotation of the turntable 66 (20) may be performed every rotation angle of 120 degrees.

  On the other hand, when a three-station injection blow molding machine is constructed using the three-station type blow molding machine shown in FIG. 2, the injection molding station 1D shown in FIG. 2 matches the injection molding station 1C shown in FIGS. . The blow molding station 2B shown in FIG. 2 corresponds to the blow molding station 3C shown in FIGS. However, the container removing step shown in FIG. 12 is not carried out, and the mold opening and rotating conveyance are carried out while holding the second container 206 on the transfer member 210 shown in FIG. Same as 2D.

  In the take-out station 3B shown in FIG. 2, the take-out step of the second container 206 shown in FIG. 12 is performed. In the take-out station 3B, the core cooling process shown in FIG. 14 can also be performed. This is because the same state as in FIG. 14 can be secured after the second container 206 is taken out at the take-out station 3B. At this time, the rail member 240 of the take-out device shown in FIG. 12 may be arranged in the take-out station 3B so that the falling second container 206 does not interfere with the cooling unit 260.

  The three-station type blow molding machine shown in FIG. 2 is not suitable for the first container 126 having a complicated shape because injection stretch blow molding is performed without temperature control of the preform, but there is a temperature control station. Since the three processing stations 1B to 3B can be arranged closer to each other, the diameter D2 of the rotary plate 66 (20) can be made smaller than the diameter D3 of FIGS. 3 and 4, and the size can be reduced. Further, the injection blow molding can speed up the molding cycle as compared with the two-station type of FIG. In addition, if the core cooling station shown in FIG. 14 is added to the take-out station 3B, injection blow molding of the second container 206 having a diameter of 8 mm or less is also possible.

5. Two-station type blow molding machine The two-station type blow molding machine shown in FIG. 1 is configured so that the second and fourth stations 2C and 4C are excluded from the four-station / 2-station switching type blow molding machine shown in FIG. Good. Further, the rail member 240 of the take-out device shown in FIG. 12 is arranged in the blow molding station 3A of FIG. 1 in the case of an injection stretch blow molding machine as well as in the case of an injection blow molding machine.

  The two-station type blow molding machine shown in FIG. 1 is not suitable for the first container 126 having a complicated shape because injection stretch blow molding is performed without temperature control of the preform. Since the two processing stations 1A and 3A can be arranged closer to each other by the absence of the take-out station, the diameter D1 of the turntable 66 (20) can be made smaller than the diameters D2 and D3 in FIGS. Is planned.

6). Rotary Joint of Injection Blow Molding Machine Using the basic structure of the four-station injection stretch blow molding machine 50 shown in FIGS. 5 to 7, the injection molding station 201 of the two-station type injection blow molding machine 200, which can be switched by replacing parts, The blow molding station 202 is shown schematically in FIG. As shown in FIG. 15, a transfer member 210 for injection blow is fixed to the turntable 66 at two positions separated by 180 ° in rotation angle.

  The two transfer members 210 are each provided with a temperature control medium supply / discharge passage 216A as shown in FIG. As shown in FIG. 15, a rotary joint 270 for supplying and discharging the temperature adjustment medium to and from the temperature adjustment medium supply / discharge passage 216 </ b> A of the two transfer members 210 that are rotationally driven by the rotation disk 66 is supported by the rotation disk 66. ing. Each of the two transfer members 210 is connected to a rotary joint 270 by first and second pipes 210A and 210B. The temperature adjustment medium is supplied from the rotary joint 270 to the transfer member 210 through the first pipe 210A, and the temperature adjustment medium is returned from the transfer member 210 to the rotary joint 270 through the second pipe 210B.

  FIG. 16 is a side view of the injection blow molding machine 200. The lower end of the rotary joint 270 whose upper end is supported by the rotary disc 66 is a traction disc via a pipe support member 290 that supports two pipes 291 and 292. 58. Since the traction board 58 and the rotary board 66 are lifted and lowered integrally, the rotary joint 270 and the pipe support member 290 are also lifted and lowered integrally. One pipe 291 supported by the pipe support member 290 supplies a temperature control medium, and the other pipe 292 discharges the temperature control medium.

  Next, details of the rotary joint 270 will be described with reference to FIGS. The rotary joint 270 is assembled as shown in FIG. 17 with a fixed shaft body 280 shown in FIG. 19 arranged inside a cylindrical housing 271 shown in FIG. The flange 272 of the housing 271 is bolted to the turntable 66, and the housing 271 rotates integrally with the turntable 66. On the other hand, the fixed shaft body 280 is fixed to the relay pipe portion 285 and is not rotated.

  As shown in FIG. 18, the housing 271 is formed with a through hole 273 into which the fixed shaft body 280 is inserted. In this through hole 273, O-ring grooves 274A, 274B, 274C having an inner diameter larger than the inner diameter of the through hole 273 are formed at three positions in the vertical direction. A region 275 defined by the O-rings 274 </ b> A and 274 </ b> B and the rotary shaft 280 is a supply passage, and is defined by the O-rings 270 </ b> B and 274 </ b> C and the rotary shaft 280. The region 276 that becomes a discharge passage becomes.

  Two first openings 275 </ b> A and 275 </ b> B communicating with the supply passage 275 are opened on the peripheral surface of the housing 271. The first opening 275A communicates with a first pipe 210A connected to one transfer member 210, and the first opening 275B communicates with a first pipe 210A connected to the other transfer member 210.

  Similarly, two second openings 276 </ b> A and 276 </ b> B communicating with the discharge passage 276 are opened on the peripheral surface of the housing 271. The second opening 276A communicates with a second pipe 210B connected to one transfer member 210, and the second opening 276B communicates with a second pipe 210B connected to the other transfer member 210.

  As shown in FIG. 17, the fixed shaft body 280 rotatably supports the housing 271 via bearings 277A and 277B. As shown in FIG. 19, the fixed shaft body 280 has two circumferential grooves 281 and 282 on the outer peripheral surface corresponding to the supply passage 275 and the discharge passage 276 of the housing 271. The circumferential groove 281 communicates with the lower end opening via the first vertical hole 281A, and the circumferential groove 282 communicates with the lower end opening via the second vertical hole 282A.

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

  According to this embodiment, the temperature control medium can be circulated through the rotary joint 270 to the two transfer members 210 that are rotationally driven together with the turntable 66. In particular, since the housing 271 connected to the two transfer members 210 via the pipes 210A and 210B rotates together with the turntable 66, the relative positional relationship between the housing 271 and the two transfer members 210 remains unchanged. Therefore, the pipes 210 </ b> A and 210 </ b> B are not twisted and broken with the rotation of the turntable 66.

  In addition, since the pipe support member 290 that supports the pipes 291 and 292 that connect the rotary joint 270 and the outside moves up and down integrally with the rotary joint 270, there is no need to route the pipes 291 and 292 redundantly.

  In the above-described embodiment, the rotary joint is used to supply and discharge the temperature control medium to and from the two transfer members 210, but other fluids may be supplied and discharged. An example of the other fluid is blow air. As shown in FIG. 8, the blow air may be supplied through the air supply path 215A, but a path for exhausting the air in the blow molded container can be provided. As another fluid, for example, a cooling medium supplied to and discharged from the neck mold 211 of the transfer member 210 shown in FIG.

  FIG. 21 shows a rotary joint housing 300 having six independent paths capable of supplying / discharging temperature control medium, supplying / discharging blow air, and supplying / discharging cooling medium. In the housing 300, six supply / discharge paths 301A to 301F partitioned by seven O-ring grooves 302 are formed. If a 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 supply / exhaust passages for the temperature control medium, and the other two paths are passages for the cooling medium, which need to be insulated from each other. For this purpose, the two central passages 301C and 301D in the vertical direction are used as blow air supply / discharge passages. For example, the passages 301A and 301B for supplying and discharging the temperature control medium and the passages 301E and 301F for supplying and discharging the cooling medium are provided. Air insulation can be done.

7). Clamping at injection molding station 7.1. Injection Clamping in Injection Stretch Blow Molding Machine FIG. 22 shows mold clamping in an injection molding station of an injection stretch blow molding machine. Of the members shown in FIG. 22, members having the same functions as those in FIG.

  22, similarly to FIG. 7, the cylinder fixing plate 60 is fixed to the upper ends of the two tie bars 62 that are moved up and down by the lower cylinder 120, and the upper cylinder 116 is fixed to the cylinder fixing plate 60. The tip of the piston 118 of the upper cylinder 116 is connected to the mold clamping plate 114. The injection core mold 112 is fixed to the mold clamping plate 114 by fixing the injection core mold fixing plate 112 </ b> A to the mold clamping plate 114 with bolts.

  As shown in FIG. 22, an opening 56 </ b> A is provided in the upper base 56 so as to face one opening 21 (see FIGS. 1 to 4) provided in the turntable 20. First, when the lower cylinder 120 is driven, the upper base 56 and the turntable 20 are lowered via the tie bars 62, and the neck mold 90 supported by the turntable 20 is clamped to the injection cavity mold 78. At this time, the injection core mold 112 is also lowered through the cylinder fixing plate 60, the upper cylinder 116, and the mold clamping disk 114. At this time, the injection core mold 112 is disposed in the injection cavity mold 78 without passing through the openings 56 and 21 and interfering with the upper base 56 and the turntable 20. Thereafter, the first injection core mold 112 fixed to the lowered mold clamping plate 114 is further lowered by the upper cylinder 116. Thereby, the neck mold 90 and the injection core mold 112 can be clamped to the injection cavity mold 78 supported on the lower base side. The above operation is similarly performed in FIG.

7.2. Injection mold clamping in the injection blow molding machine FIG. 23 shows injection mold clamping in the injection blow molding machine using the mechanism shown in FIG. As described above, since the transfer mold unit (transfer member) 210 shown in FIG. 23 is fixed to the turntable 20, the transfer mold unit 210 is clamped only by the lower cylinder 120 without using the upper cylinder 116. It is possible. However, in FIG. 23, the transfer mold unit 210 is clamped using the upper cylinder 116 as in FIG.

  Therefore, a pressure receiving block 400 shown in FIG. 23 is bolted to the mold clamping plate 114 instead of the injection core die 112 shown in FIG. First, when the lower cylinder 120 is driven, the upper base 56 and the turntable 20 are lowered via the tie bars 62, and the transfer mold unit 210 supported by the turntable 20 is closed. At this time, the pressure receiving block 400 is also lowered through the cylinder fixing plate 60, the upper cylinder 116, and the mold clamping plate 114. At that time, the pressure receiving block 400 passes through the openings 56 and 21 and is lowered without interfering with the upper base plate 56 and the turntable 20.

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

  Here, the case where the lower cylinder 120 pulls the upper base 56 without using the upper cylinder 116 and the transfer mold unit 210 is clamped by the upper base 56 via the turntable 20 is compared with the present embodiment. To do. If the upper cylinder 116 is not used, a mold clamping force acts on the rotating disk 20 between the upper base 56 and the transfer mold unit 210. Thereby, there exists a possibility that the rotating disk 20 with weak rigidity may deform | transform. The deformation of the turntable 20 becomes an obstacle when it is rotationally driven with respect to the upper base 56, and generates abnormal noise and rotation failure.

  In this embodiment, the pressure receiving block 400 is fixed to the mold clamping plate 114 driven by the lower cylinder 120 together with the upper base 56, and the pressure receiving block 400 directly presses the transfer mold unit 210. The base 56 and the turntable 20 are not tightened. Therefore, it is possible to prevent a failure during rotation due to the deformation of the turntable 20.

7.3. Relationship Between Upper Cylinder and Lower Cylinder In this embodiment, the lower cylinder 120 and the upper cylinder 116 have substantially the same cylinder inner diameter, and can be set to the same pressure during mold clamping. In order to set the lower cylinder 120 and the upper cylinder 116 to the same pressure, a circuit of a pressure medium such as oil may be short-circuited. Since the pressing force of each of the lower cylinder 120 and the upper cylinder 116 is equal to the pressure receiving area × pressure, they are equal. The equal pressing force of each of the lower cylinder 120 and the upper cylinder 116 acts downward.

  Here, in a mold clamping state where both the lower cylinder 120 and the upper cylinder 116 are driven at the same pressure, a downward pressing force of the lower cylinder 120 and an upward reaction force that resists the downward pressing force of the upper cylinder 116 are generated. It is balanced and offset. Therefore, only the pressing force of the upper cylinder 116 is used as the mold clamping force. This applies to both the injection mold clamping of the injection stretch blow molding machine shown in FIG. 22 and the injection mold clamping of the injection blow molding machine shown in FIG.

  In the injection blow molding machine, the pressure receiving block 400 is fixed to the mold clamping 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 clamped. Therefore, the mold clamping force does not act on the upper base 56 and the turntable 20 at the time of mold clamping, and deformation of the turntable 20 is prevented. In the injection stretch blow molding machine, since the injection core mold 112 is fixed to the mold clamping disk 114 driven by the upper cylinder 116, the injection core mold 112 can be clamped together with the neck mold 90 pressed by the injection core mold 112. Also at this time, the clamping force does not act on the upper base 56 and the turntable 20.

7.4. New Structure and Function of Stopper Rod As described above, the stopper rod 140 shown in FIG. 7 is for assisting in restricting the lowering limit of the upper base 56. In other words, the stopper rod 140 is for stopping the downward movement of the upper base 56 when an incorrect mold thickness is set or when the inclination of the upper base 56 is more than a predetermined angle. Therefore, as shown in the comparative example of FIG. 26 using the stopper rod 140, a clearance δ4 is secured between the stopper rod 140 and the upper base 56 side during mold clamping.

  22 and 23, the stopper rod 410 whose lower end 410A is fixed to the lower base 54 and extends upward is different in structure and purpose from the stopper rod 140 of FIG. The upper end 410B of the stopper rod 410 abuts the upper base 56 side without a gap during mold clamping so that the upper base 56 can be supported at the mold clamping position.

  When the upper base 56 is driven to be pressed by the lower cylinder 120, the force of the lower cylinder 120 balances with the reaction force of the upper cylinder 116 when the mold is clamped, and the pressing force is released. At the time of clamping, the upper base 56 abuts on the stopper rod 410 and is supported at the clamping position. Therefore, the height position of the upper base 56 at the time of mold clamping is uniquely determined, and the rotary base 20 is not deformed by pressing the rotary base 20 by its own weight or the like.

  In FIGS. 22 and 23, a spacer member 420 may be further provided between the upper base 56 and the upper end 410B of the stopper rod 410 to adjust the mold clamping position of the upper base 56 during mold clamping.

  Here, in FIG. 22 and FIG. 23, the distance L5 between the lower base 54 and the upper base 56 at the time of clamping is the same. However, in the injection stretch blow molding machine shown in FIG. 22 and the injection blow molding machine shown in FIG. 23, it is rather rare that the distance L5 between the upper base 56 and the lower base 54 during mold clamping is equal. The distance L5 may be different between FIG. 22 and FIG. 23 depending on the difference in height between the injection core mold 112 and the transfer mold unit 210 and the length of the molded product.

In such a case, the interval L5 between the upper base 56 and lower base 54 during clamping, the presence or absence of the spacer member 420, by changing the thickness of the spacer member 420, changing the clamping position of the upper base 56 This can be easily adjusted.

The upper end 410B side of the stopper rod 410 is enlarged and shown in FIG. As shown in FIG. 24, the spacer member 420 can be fixed to the upper base 56 by a bolt 431 together with a hollow guide 430 that guides the stopper rod 410 up and down. If the bolt 431 is removed, the distance L5 can be adjusted by removing the spacer member 420 or replacing it with another spacer member 420 having a different thickness. However, in the comparative example of FIG. 26, since the clearance δ4 is secured between the stopper rod 140 and the upper base 56 side during mold clamping, the distance L5 cannot be adjusted even if the spacer member is changed.

7.5. FIG. 25 is an explanatory diagram showing the mold clamping shown in FIG. 23 in comparison with a comparative example. FIG. 26 is an enlarged view of a portion A showing a comparative example portion of FIG. FIG. 27 is an enlarged view of part B showing the embodiment part of FIG.

  First, in the present embodiment, as shown in FIG. 27, the first clearance δ1 can be provided between the opposing surfaces of the pressure receiving block 400 and the upper base 56 during mold clamping. The pressure receiving block 400 is stopped at a position in close contact with the clamped transfer mold unit 210. On the other hand, the mold clamping position of the upper base 56 determined by the stopper rod 410 can be adjusted without being affected by the pressure receiving block 400. Thereby, the first clearance δ1 can be ensured between the opposing surfaces of the pressure receiving block 400 and the upper base 56. Thereby, it is ensured that the pressure from the pressure receiving block 400 does not act on the upper base 56, and it is possible to prevent the turntable 20 from being deformed via the upper base 56. As shown in FIG. 24, the first clearance δ1 is also formed between the opposing surfaces of the neck mold fixed plate 112A and the upper base plate 56 during mold clamping.

  In the comparative example shown in FIG. 26, the pressure receiving block 400A driven by the upper cylinder 116 presses the upper base 56 unlike the pressure receiving block 400 of FIG. Thus, the gap δ between the opposed surfaces of the pressure receiving block 400A and the upper base 56 becomes zero. Therefore, in the comparative example of FIG. 26, the upper base 56 and the turntable 20 are sandwiched between the pressure receiving block 400A and the transfer mold unit 210 during mold clamping. For this reason, an excessive force is applied to the turntable 20, and the turntable 20 having relatively weak rigidity is deformed.

  Next, in the present embodiment, as shown in FIG. 27, a second clearance δ2 can be provided between the opposing surfaces of the upper base 56 and the turntable 20 during mold clamping. Originally, the clearance between the opposed surfaces of the upper base plate 56 and the turntable 20 is designed so that a clearance is secured when the turntable 20 is rotated and conveyed. Otherwise, the rotational drive of the turntable 20 is adversely affected. In the present embodiment, the force of the pressure receiving block 400 is not transmitted to the upper base 56, and the upper base 56 is supported by its own weight by the stopper rod 410. 20 can be ensured between the opposing surfaces. This prevents the turntable 20 from being sandwiched between the upper base 56 and the transfer mold unit 210 and prevents the turntable 20 from being deformed.

  On the other hand, in the comparative example shown in FIG. 26, the upper base 56 and the turntable 20 are sandwiched between the pressure receiving block 400 </ b> A and the transfer mold unit 210 at the time of clamping as described above. Therefore, a clearance δ2 similar to that during rotation conveyance cannot be ensured between the opposing surfaces of the upper base plate 56 and the turntable 20. Therefore, the mold clamping force acts on the turntable 20 and deforms.

7.6. Attachment Structure of Transfer Member The transfer member attached to the turntable 20 is a neck mold 90 in the case of an injection stretch blow molding machine, and a transfer mold unit 210 in the case of an injection blow molding machine.

  The neck mold 90 includes a pair of split molds, and the pair of split molds are supported so as to be openable and closable along two L-shaped guides 500 fixed to the turntable 20, as shown in FIG. On the other hand, as shown in FIG. 28, the transfer mold unit 210 is fixed to the turntable 20.

  FIG. 28 shows a mounting structure of the transfer mold unit 210. The transfer mold unit 210 has a mounting hole 210C. A flanged sleeve 510 is inserted into the mounting hole 210C. The flanged sleeve 510 has a holed flange 511 and a hollow shaft part 512 inserted through the mounting hole 210C. Since the hollow shaft portion 512 is formed to be slightly longer than the mounting hole 210 </ b> C, the bolt 520 inserted through the flanged sleeve 510 is fastened to the turntable 20, so that the space between the transfer mold unit 210 and the turntable 20 is fixed. The transfer mold unit 210 can be fastened between the flange 511 and the turntable 20 while ensuring the constant third clearance δ3. In FIG. 28, a washer 530 is interposed between the head 521 of the bolt 520 and the flange 511 to prevent loosening.

  Here, since the neck mold 90 is supported by the turntable 20 so as to be openable and closable while having a constant third clearance δ3 by the L-shaped guide 500, the turntable 20 having relatively weak rigidity is not deformed. On the other hand, as shown in the comparative example of FIG. 26, when the transfer mold unit 210 is bolted to the turntable 20, the less rigid turntable is deformed by being tightened on a relatively wide surface of the transfer mold 210, There is a risk of adversely affecting the rotational drive of the rotating disk.

  In that respect, the flanged sleeve 510 shown in FIG. 28 fastens the transfer mold unit 210 with a certain gap δ3 between the flange 511 and the turntable 20, so that it acts on the area of the flange 511. Only the force acts on the turntable 20, and the load on the turntable 20 is reduced. Thereby, deformation of the turntable 20 is suppressed, and it is easy to secure the second clearance δ2 between the facing surfaces of the turntable 20 and the upper base 56.

  In addition, this invention is not limited to embodiment mentioned above, A various deformation | transformation implementation is possible within the range of the summary of this invention.

1A to 1D, 68, 201 Injection molding station, 2B, 2D, 3A, 3C, 3D, 70, 202 Blow molding station, 3B, 4C, 4D, 74 Removal station, 2C, 2D, 72 Temperature control station, 3B, 4D Core cooling station, 20, 66 turntable, 21-24 opening, 50 injection stretch blow molding machine, 52 machine base, 54 lower base, 56 upper base, 58, 62, 120 vertical clamping mechanism, 78 first injection cavity mold , 82 Blow mold clamping mechanism, 84 First blow cavity mold, 90 First neck mold, 92 Transfer member, 100 Blow mold, 104 Stretch rod, 112 First injection core mold, 116 Upper cylinder, 120 Lower cylinder, 124 First Preform, 126 1st container, 200 injection blow molding machine, 205 2nd pref 206, second container, 210 transfer member, 210A, 210B, first and second piping, 210C hole, 211 second neck type, 212 second injection core type, 220 second injection cavity type, 230 second blow cavity Mold, 270 Rotary joint, 271,300 Housing, 275A, 275B First opening, 276A, 276B Second opening, 280 Rotating shaft, 281, 282 Circumferential groove, 281A, 282A First, second vertical hole, 290 Piping support member, 291, 292 Piping, 400 Pressure receiving block, 410 Stopper rod, 420 Spacer member, 500 L-shaped guide, 510 Flange sleeve, 520 bolt, δ1 first clearance, δ2 second clearance, δ3 third clearance

Claims (15)

The lower base,
An upper base that is raised and lowered above the lower base;
A turntable that is rotatably supported by the upper base and stops a plurality of transfer members at a plurality of rotation stop positions;
A plurality of processing stations disposed at the plurality of rotation stop positions in a space between the lower base and the upper base;
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;
A blow molding machine used for both an injection stretch blow molding machine and an injection blow molding machine by exchanging parts including the plurality of transfer members, the injection mold and the blow mold,
The injection molding station
A lower cylinder supported by the lower base and driving the upper base up and down;
An upper cylinder supported by the upper base and driving the mold clamping machine up and down;
Have
When the blow molding machine is used in an injection stretch blow molding machine, each of the plurality of transfer members includes a first neck mold, and at the injection molding station, the upper base and the turntable are driven by the lower cylinder. And a first injection cavity mold supported on the lower base by lowering the first injection core mold fixed to the lowered mold clamping disk by the upper cylinder and lowering the mold clamping disk The first neck mold and the first injection core mold are clamped to form a first preform,
When the blow molding machine is used in an injection blow molding machine, each of the plurality of transfer members includes a transfer mold unit having a second neck mold and a second injection core mold, and at the injection molding station, The transfer mold unit is configured such that the upper base, the rotating disk, and the mold clamping disk are lowered from the lower cylinder, and a pressure receiving block fixed to the lowered mold clamping disk is further lowered from the upper cylinder. A blow molding machine, wherein the second preform is formed by directly pressing and clamping the transfer mold unit to a second injection cavity mold supported on the lower base side. In claim 1,
The lower cylinder and the upper cylinder have substantially the same cylinder inner diameter, and are set to the same pressure when clamping. In claim 2,
A stopper rod extending upward from the lower base;
The blow molding machine according to claim 1, wherein the upper base is in contact with the stopper rod during mold clamping and is supported at a mold clamping position. In claim 1,
A blow molding machine further comprising a spacer member that is interposed between the upper base and the stopper rod during the mold clamping and adjusts the mold clamping position of the upper base. In claim 3 or 4,
A blow molding machine characterized in that a first clearance is provided between opposing surfaces of the pressure receiving block and the upper base during the clamping. In any one of Claims 1 thru | or 5,
A blow molding machine characterized in that a second clearance is provided between opposing surfaces of the upper base and the rotating disk during the mold clamping. In any one of Claims 1 thru | or 6.
The first neck type is composed of a pair of split molds, and the pair of split molds are supported so as to be openable and closable along two L-shaped guides fixed to the turntable.
The transfer mold unit includes a hole through which a flanged sleeve is inserted,
The flanged sleeve includes a holed flange and a hollow shaft part extending from the holed flange, and the length of the hollow shaft part is longer than the hole,
A bolt inserted into the flanged sleeve is fastened to the rotating disk, so that a certain third clearance is secured between the transferring mold unit and the rotating disk, and the transfer mold unit is connected to the flange. A blow molding machine, wherein the blow molding machine is fastened with the rotating disk. In any one of Claims 1 thru | or 7,
When the blow molding machine is used in an injection blow molding machine, a rotary joint is further provided,
The transfer mold unit includes a passage,
First piping and second piping connected to the rotary joint and the transfer mold unit are further provided, the first piping supplies fluid to the passage, and the second piping supplies the fluid from the passage. Discharge,
The rotary joint is
A fixed shaft,
A housing disposed around the fixed shaft and fixed to the turntable;
Have
The fixed shaft body communicates with a plurality of circumferential grooves formed on an outer surface, a first vertical hole communicated with one of the plurality of circumferential grooves, and another one of the plurality of circumferential grooves. Including a second longitudinal hole,
The housing is connected to the first pipe, the first opening facing the one of the plurality of circumferential grooves, and the second pipe is connected to the other one of the plurality of circumferential grooves. A blow molding machine comprising: a second opening. In claim 8,
A third pipe for supplying the fluid from the outside to the rotary joint;
A fourth pipe for discharging the fluid from the rotary joint to the outside;
A pipe support member for supporting the third pipe and the fourth pipe;
Further comprising
The blow molding machine characterized in that the pipe support member moves up and down together with the rotary disk and the rotary joint. In any one of Claims 1 thru | or 9,
When the blow molding machine is used in the injection stretch blow molding machine, the first preform is held by the first neck mold and conveyed to the blow molding station by the rotary conveyance of the rotating disk. The first preform disposed in the first blow cavity mold clamped to the first neck mold at the molding station is biaxially stretched by driving the longitudinal axis of the stretching rod and blow air from the blow core mold. And blow-molding the first container,
When the blow molding machine is used in the injection blow molding machine, the second preform is held by the transfer mold unit and conveyed to the blow molding station by the rotary conveyance of the rotating disk, and the blow molding is performed. The second preform placed in the second blow cavity mold to be clamped with the transfer mold unit at the station is stretched by blow air from the second injection core mold to blow mold the second container. A blow molding machine. In claim 10,
The rotating disk is intermittently rotated at a rotation angle of 180 degrees,
The plurality of processing stations include first and second stations arranged along a rotational conveyance direction, the first station is the injection molding station, and the second station is the blow molding station and the take-out station. A blow molding machine that is also used as a machine. In claim 10,
The rotating disk is intermittently rotated at a rotation angle of 90 degrees,
The plurality of processing stations is composed of first to fourth stations arranged along the rotational conveyance direction,
When the blow molding machine is used for the injection stretch blow molding machine, the first station is the injection molding station, the second station is a preform temperature control station, and the third station is the blow molding station. And the fourth station becomes the take-out station,
When the blow molding machine is used for the injection blow molding machine, the first station becomes the injection molding station, the second station becomes the blow molding station, the third station becomes a take-out station, and the first station 4. Blow molding machine characterized in that four stations serve as cooling stations for cooling the second injection core mold. In claim 10,
The rotating disk is intermittently driven at a rotation angle of 90 degrees or 180 degrees,
The plurality of processing stations is composed of first to fourth stations arranged along the rotational conveyance direction,
When the blow molding machine is used for the injection stretch blow molding machine, the first station is the injection molding station, the second station is a preform temperature control station, and the third station is the blow molding station. And the fourth station becomes the take-out station,
When the blow molding machine is used for the injection blow molding machine, the first station serves as the injection molding station, the third station serves as both the blow molding station and the take-out station, and the second station and The blow molding machine, wherein the rotating disk is not stopped at the fourth station. In claim 10,
The rotating disk is intermittently driven at a rotation angle of 120 degrees,
The plurality of processing stations are composed of first to third stations arranged along the rotation conveyance direction,
When the blow molding machine is used for the injection stretch blow molding machine, the first station is the injection molding station, the second station is the blow molding station, the third station is a take-out station,
When the blow molding machine is used for the injection blow molding machine, the first station is the injection molding station, the second station is the blow molding station, and the third station is the take-out station. A blow molding machine. In claim 10, 11, 12 or 14,
A blow molding machine, wherein a blow mold clamping mechanism for laterally clamping the blow mold at the blow molding station is used for both the injection stretch blow molding machine and the injection blow molding machine.

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