JP4074409B2 - Injection stretch blow molding equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an injection stretch blow molding apparatus, and more particularly to an injection stretch blow molding apparatus that enables downsizing of the entire apparatus.
[0002]
[Background Art and Problems to be Solved by the Invention]
The applicant of the present application has previously proposed an injection stretch blow molding apparatus as disclosed in JP-A-8-132517.
[0003]
This injection stretch blow molding apparatus includes a preform molding station for injection molding a preform, a transfer station for transferring the preform from the preform molding station, and a blow molding for blow molding the preform received from the transfer station into a container shape. It is an epoch-making thing which achieved miniaturization of the apparatus by arranging the station linearly.
[0004]
On the other hand, further miniaturization has been desired in consideration of ease of handling during transportation.
[0005]
An object of the present invention is to provide an injection stretch blow molding apparatus that can save space in the entire apparatus and achieve further miniaturization.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, an injection stretch blow molding apparatus of the present invention comprises:
A preform molding station for injection-molding a preform, and a blow molding station for stretch-blow molding a container from the preform,
The preform molding station includes an injection molding unit connected to an injection device, a preform take-out unit for taking out the preform, and a rotary conveyance unit that rotates and conveys the preform from the injection molding unit to the preform take-out unit. Have
The injection molding part and the preform take-out part are arranged in parallel in a direction orthogonal to the injection device,
The blow molding station is arranged in parallel with the injection device.
[0007]
According to the present invention, the injection molding part and the preform take-out part of the preform molding station are arranged in parallel in a direction orthogonal to the injection apparatus, and the blow molding station is arranged in parallel with the injection apparatus, thereby Within the width, the space next to the injection device can be used effectively, and blow molding can be performed without extending the blow molding station in the length direction of the injection device, saving space and reducing the size of the entire device. can do.
[0008]
Another injection stretch blow molding apparatus of the present invention is
A preform molding station for injection-molding a preform, and a blow molding station for stretch-blow molding a container from the preform,
The preform molding station includes an injection molding unit connected to an injection device, a preform take-out unit for taking out the preform, and a rotary conveyance unit that rotates and conveys the preform from the injection molding unit to the preform take-out unit. Have
The injection molding part and the preform take-out part are arranged in parallel in a direction orthogonal to the injection device,
The injection molding section performs injection molding of a plurality of preforms in parallel with the injection apparatus, and the rotary conveying means arranges the plurality of injection molded preforms in parallel with the injection apparatus at a preform take-out section. And
The blow molding station is arranged in parallel with the injection device and conveys the preform along the injection device.
[0009]
According to the present invention, a plurality of preforms are injection-molded in parallel with the injection apparatus at the injection molding section of the preform molding station, and the preform is arranged in parallel with the injection apparatus at the preform take-out section by the rotary conveying means. The blow molding can be performed at the lateral position of the injection device without extending the blow molding station in the length direction of the injection device by conveying the preform along the injection device and performing blow molding. The entire space can be saved and downsizing can be achieved.
[0010]
In the present invention, the blow molding station includes a plurality of processing units, and a transport unit that transports a preform or a container to the plurality of processing units,
It is preferable that the conveying means is movable in a blow molding station in a direction parallel to the injection device.
[0011]
In this way, the preform or container can be moved in the direction parallel to the injection apparatus by the conveying means, and a plurality of processes can be performed by a plurality of processing units, and the blower can be blown without increasing the apparatus width. Molding can be performed.
[0012]
In this case, the plurality of processing units include a heating unit that heats the preform taken out from the preform take-out unit, and a blow molding unit that blow-molds the preform heated by the heating unit into a container shape. It is preferable that the container is a container take-out part for taking out the container formed by the blow molding part.
[0013]
By doing in this way, a series of processes of heat treatment, blow molding process, and container removal for the preform can be performed along the injection device.
[0014]
Furthermore, in this case, it is preferable that the transport means can be opened and closed with respect to the preform or the neck of the container across a plurality of processing units.
[0015]
By doing in this way, a preform or a container can be repeatedly conveyed with respect to each process part with a small number of movements.
[0016]
In this case, it is preferable that a receiving member for receiving the preform is disposed in the preform take-out portion, and the receiving member is movable to the heating portion.
[0017]
By doing in this way, a preform can be received by a receiving member from a preform taking-out part, can be moved to a heating part, and can be delivered to a blow molding station.
[0018]
Further, in this case, the receiving member is preferably a cooling pot.
[0019]
In this way, when molding a relatively thick preform or when molding to reduce the influence of temperature during injection molding, the preform is received by the cooling pot at the preform receiving section and heated. The preform can be cooled during delivery to the section, and can be efficiently cooled.
[0020]
In this case, the heating unit includes a heating box disposed above the conveying unit, and a preform holding unit receives the preform from the receiving member, a heating position in the heating box, and the conveying unit. It is preferable to be able to move up and down between the delivery positions.
[0021]
By doing so, it is possible to prevent the influence of heat from the heating box on the conveying means, and furthermore, by raising and lowering the preform holding means, the raising and lowering operation of the conveying means is eliminated, and the conveying efficiency by the conveying means is increased. Can be improved.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.
[0023]
FIG.1 and FIG.2 is a figure which shows the injection stretch blow molding apparatus which concerns on one embodiment of this invention.
[0024]
FIG. 1 is a plan view of an injection stretch blow molding apparatus according to the present embodiment, and FIG. 2 is a side view seen from the II direction of FIG.
[0025]
As shown in each figure, this injection stretch blow molding apparatus 10 includes a preform molding station 14 for injection molding a preform on a machine base 12, and a blow molding station 16 for stretch blow molding a container from the preform. is doing.
[0026]
As shown in FIG. 1, the preform molding station 14 is provided with an injection device 22 in the longitudinal direction at a position from one side of the machine base 12 in the width direction. An injection molding portion 24 and a preform take-out portion 26 that can be connected to the device 22 are arranged in parallel in a direction orthogonal to the injection device 22.
[0027]
Further, in the blow molding station 16, a heating unit 60, a blow molding unit 62, and a container extraction unit 64 as a plurality of processing units are arranged in a straight line along the injection device 22 in order from the preform extraction unit 26 side. Has been.
[0028]
By adopting such an arrangement, the space next to the injection device 22 is effectively used to reduce the size of the device.
[0029]
Specifically, as shown in FIG. 1, the preform molding station 14 has injection core dies 18 at two locations 180 degrees apart from each other at a rotation angle, and intermittently injects the injection core dies 18 along the rotation conveyance path. And a rotating plate 20 as a rotating and conveying means for reversely conveying.
[0030]
Further, at each stop position of the injection core mold 18, an injection molding part 24 is provided at a position facing the injection device 22, and a preform take-out part 26 is provided facing the injection molding part 24.
[0031]
As shown in FIG. 2, the injection molding unit 24 has an injection cavity mold 28 that is clamped and driven relative to the injection core mold 18, and a plurality of, for example, eight preforms 1 (in FIG. 2). The heating unit 60) is simultaneously injection molded.
[0032]
More specifically, the injection molding unit 24 is provided with a lower mold clamping plate 30 fixed on the machine base 12, and an upper mold clamping plate 32 is disposed above the lower mold clamping plate 30.
[0033]
The upper mold clamping plate 32 can be moved up and down along a plurality of tie bars 34.
[0034]
A fixed plate 36 is provided at the upper end of the tie bar 34, and the upper mold clamping plate 32 is driven up and down by a mold clamping cylinder 38 provided on the fixed plate 36.
[0035]
A rotary plate 20 is rotatably supported on the lower surface of the upper mold clamping plate 32, and the rotary plate 20 can be driven to reverse 180 degrees by a reverse driving means 40 provided on the upper mold clamping plate 32.
[0036]
In the rotating plate 20, two rows of injection core dies 18 arranged in parallel with the injection device 22 and a neck cavity die 42 forming a neck portion of the preform 1 correspond to the injection molding portion 24 and the preform take-out portion 26. Are supported at each position.
[0037]
The injection molding unit 24 is provided with a hot runner mold 44 that is in nozzle touch with the injection device 22, and an injection cavity mold 28 is fixed to the upper portion of the hot runner mold 44.
[0038]
This injection cavity mold 28 has the number of simultaneous moldings in the injection molding part 24, for example, eight cavities.
[0039]
In this embodiment, two injection cavity molds having four cavities are arranged in series.
[0040]
The eight cavities are arranged in parallel with the injection device 22, and the injection core mold 18 and the neck cavity mold 42 are arranged in parallel with the injection device 22 corresponding to the eight cavities, and the preform is rotated 180 degrees. The take-out portion 26 is also arranged in parallel with the injection device 22.
[0041]
The preform take-out part 26 is provided at a 180 ° rotation position with respect to the injection molding part 24, and the preform 1 conveyed to the preform take-out part 26 is arranged in parallel with the injection device 22. ing.
[0042]
The preform 1 is taken out in a state of being arranged in parallel with the injection device 22.
[0043]
Specifically, in the preform take-out portion 26, the neck portion of the preform 1 is formed by the neck cavity mold 42, and the preform 1 is held by the neck cavity mold 42 and the injection core mold 18 and is rotated by the rotating plate 22. Then, it is conveyed to the preform takeout unit 26.
[0044]
In the preform take-out portion 26, after the injection core mold 18 is partially released, the preform 1 is released from the neck cavity mold 42 so that the preform 1 is taken out.
[0045]
The neck cavity mold 42 is constituted by a split mold, and each split mold is fixed to a neck fixing plate 46 composed of a split plate biased in the closing direction. The preform 46 can be taken out from the neck cavity mold 42 by opening the plate 46 with an opening means.
[0046]
In this embodiment, two neck fixing plates having four neck cavity molds are arranged in series.
[0047]
The preform take-out unit 26 is provided with eight transport cylinders 48 as a receiving member that receives the preform 1 at a position below the preform 1 in a row corresponding to the transport stop position of the preform 1.
[0048]
These conveying cylinders 48 are raised by a lifting device (not shown) and lowered after receiving the preform 1, and the injection device 22 is moved from the preform take-out portion 26 position to the heating portion 61 of the blow molding station 16 on the machine base 12. The preform take-out section 26 can be moved to the heating section 60 in a state where the preform 1 is received in each transport cylinder 48. .
[0049]
The conveying cylinders 48 are divided into four parts, and the four conveying cylinders 48 are divided by the pitch converting mechanism 52 from the pitch at the time of injection molding at the position of the preform take-out part 26 in the heating part 60 during blow molding. The pitch is converted into a pitch.
[0050]
The blow molding station 16 has a height position that does not hinder the movement of the transport cylinder 48, and a transport rail 66 extending from the heating unit 60 through the blow molding unit 62 to the container extraction unit 64 is disposed along the injection device 22. The conveying means 68 is attached to the conveying rail 66 so as to be horizontally movable.
[0051]
The conveying means 68 has a length extending over two processing parts, for example, a heating part 60 and a blow molding part 62, and a blow molding part 62 and a container take-out part 64, and each of the two processing parts has a total of 16 pieces. The preform 1 or the container can be conveyed and supplied.
[0052]
Specifically, as shown in part in FIG. 1, the preform 1 or a pair of plate-like members having semicircular cutouts corresponding to the container position, the plate-like member is a preform. It can be opened and closed with respect to 1 or the container position, and is transported while supporting the lower surface of the flange formed on the neck portion at the close position.
[0053]
Further, the conveying means 68 can be opened and closed with respect to the preform 1 or the neck portion of the container, and can hold and open the preform 1 or the container.
[0054]
In the heating unit 60, a heating box 72 having an infrared heater 70 is disposed above the conveyance rail 66, and a heating core 74 as a preform holding unit can be moved up and down by a heating core lifting cylinder 76.
[0055]
The heating core 74 can be moved up and down between a receiving position A for receiving the preform 1 from the conveying cylinder 48, a heating position B in the heating box 72, and a delivery position C to the conveying means 68. The heating core 74 is inserted into the neck portion of 1, the preform 1 is extracted from the receiving position A, heated to the heating position B and heated while rotating the preform 1, and then lowered to the delivery position C to be transported 68. It is supposed to be handed over to.
[0056]
The blow molding portion 62 is inserted into the blow cavity mold by a blow cavity mold (not shown) having eight container-shaped cavities that can be clamped by a mold clamping mechanism 78, a blow core lifting cylinder 80 and a stretching rod lifting mechanism 82. And eight blow core molds 84 that can be clamped, and at the same time, eight preforms can be blow molded into a container shape.
[0057]
The container take-out portion 64 is capable of raising and lowering eight eject cores 86 by an eject core raising / lowering cylinder 88. When the container is conveyed to the container take-out portion 64 by the conveying means 68, the eject core 86 is moved into the container neck. The container is dropped and can be taken out by opening the conveying means 68 in a state where the container is inserted and positioned.
[0058]
In addition, an extraction belt conveyor 90 is provided on the lower side of the container extraction portion 64 so that the container can be extracted outside the apparatus.
[0059]
Next, the operation state of the above-described injection stretch blow molding apparatus 10 will be described.
[0060]
First, in the preform molding station 14, the upper mold clamping plate 32 and the rotary plate 20 are lowered by the driving of the mold clamping cylinder 38 in the injection molding unit 24, and the injection core mold 18 and the neck cavity mold 42 are moved into the injection cavity mold 28. The mold is clamped.
[0061]
In this state, the molten resin is injected from the injection device 22 into the injection cavity mold 28 through the hot runner mold 44 and cooled until the preform 1 can be taken out from the injection cavity mold, and then the upper mold is pressed by the mold clamping cylinder 38. The fastening plate 32 and the rotating plate 20 are raised and the preform 1 is released from the injection cavity mold 28 and taken out.
[0062]
In this case, since the plurality of preforms 1 are injection-molded by the injection cavity mold 28 in parallel with the injection device 22, the removed preforms 1 are also arranged in parallel with the injection device 22. .
[0063]
Next, when the rotating plate 20 is rotated 180 degrees by the reverse driving means 40, the preform 1 is arranged at the position of the preform take-out portion 26.
[0064]
In this state, the preform 1 is arranged in parallel with the injection device 22 in a state of facing the injection molding portion 24.
[0065]
At this time, the other injection core mold 18 and the neck cavity mold 42 are positioned on the injection molding portion 24 side, and are in a state of being ready for the next injection molding.
[0066]
Next, when the upper mold clamping plate 32 and the rotary plate 20 are lowered and the injection molding operation of the next cycle is started, the conveying cylinder 48 is raised in the preform take-out portion 26 and is pushed from the injection core mold 18. The reform 1 is released and accommodated in the transport cylinder 48, the neck cavity mold 42 is opened via the neck fixing plate 46, and the preform 1 is released and held by the transport cylinder 48.
[0067]
Next, when the preform 1 is inserted into the conveying cylinder 48, the conveying cylinder 48 descends and retains the retained heat at the time of injection molding to the heating unit 60 of the blow molding station 14 along the conveying rail 50. It is conveyed as it is.
[0068]
At this time, the conveying cylinder 48 is converted into a wide pitch by four according to the pitch for blow molding by the pitch converting mechanism 52.
[0069]
In the heating unit 60, when the preform 1 is conveyed, the heating core 74 is lowered to the receiving position A by the heating core lifting cylinder 76, inserted into the neck portion of the preform 1, and the preform 1 is held inside, After heating up to the heating position B and rotating, it is lowered to the delivery position C and delivered to the conveying means 68.
[0070]
At this time, the conveying means 68 is in an open state with respect to the preform 1, and when the preform 1 is lowered to the delivery position C, the conveying means 68 is closed and the neck portion of the preform 1 is held. At the same time, the blow molding portion 62 also holds the neck portion of the container held by the blow cavity mold.
[0071]
Thereafter, the heating core 74 rises to the heating position B and enters a state of waiting until the next preform 1 is conveyed.
[0072]
Then, in a state where the blow cavity mold is opened in the blow molding part 62, the conveying means 68 is conveyed to the blow molding part 62 and the container take-out part 64 side, and the heated preform 1 is transferred to the blow molding part 62. A container will be conveyed to the container extraction part 64.
[0073]
Next, in the blow molding part 62, the blow cavity mold is clamped to hold the preform 1 and blow molding is performed. In the container take-out part 64, the eject core 86 is conveyed by the eject core raising / lowering cylinder 88. When the conveying means 68 is opened by being inserted into the neck portion of the container conveyed by 68, the conveying means 68 is opened while preventing the container from being biased to one side.
[0074]
By opening the conveying means 68, the container is dropped downward and carried out of the apparatus by the take-out conveyor 90.
[0075]
Then, when the conveying means 68 is moved to the heating unit 60 side with the conveying means 68 open, the preparation for holding the next preform 1 is completed and the blow molding in the blow molding part 62 is performed. When the neck portion of the container can be gripped and the above steps are repeated, the blow molding and the container can be efficiently taken out from the injection molding of the preform 1 in a space-saving manner.
[0076]
The present invention is not limited to the above-described embodiment, and can be modified into various forms within the scope of the gist of the present invention.
[0077]
For example, in the above-described embodiment, the preforms are injection-molded one by one, and the blow-molding is performed for each one-row preform. However, the present invention is not limited to this. May be injection molded, and blow molding may be performed for each row of preforms.
[0078]
In this case, in the heating unit, the preform can be easily taken out for each row by moving the receiving member in the direction intersecting the transport direction.
[0079]
Moreover, although the number of preforms simultaneously formed is 8, this number can be changed as appropriate.
[0080]
Further, the preform take-out unit is configured to receive the preform by the transport cylinder, but various receiving members such as a holding plate capable of inserting and holding the preform can be used.
[0081]
In this case, by using the receiving member as a cooling pot, it is possible to efficiently cool in the case of a relatively thick preform.
[0082]
Moreover, although the heating part, the blow molding part, and the container extraction part have been shown as the processing part of the blow molding station, it is possible to increase the number of heating parts or omit the heating part freely. is there.
[0083]
Further, in the processing section of the blow molding station, each process may be performed with the preform inverted, and for that purpose, the preform received by the receiving member is inverted by the receiving member and heated in an inverted state. It will be handed over to the department.
[Brief description of the drawings]
FIG. 1 is a plan view of an injection stretch blow molding apparatus according to an embodiment of the present invention.
FIG. 2 is a side view seen from the direction II in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Preform 10 Injection stretch blow molding apparatus 14 Preform molding station 16 Blow molding station 20 Rotating plate 22 Injection apparatus 24 Injection molding part 26 Preform extraction part 48 Conveying cylinder 60 Heating part 62 Blow molding part 64 Container extraction part 68 Conveying means 72 Heating box

Claims (8)

A preform molding station for injection-molding a preform, and a blow molding station for stretch-blow molding a container from the preform,
The preform molding station includes an injection molding unit connected to an injection device, a preform take-out unit for taking out the preform, and a rotary conveyance unit that rotates and conveys the preform from the injection molding unit to the preform take-out unit. Have
The injection molding part and the preform take-out part are arranged in parallel in a direction orthogonal to the injection device,
An injection stretch blow molding apparatus, wherein the blow molding station is arranged in parallel with the injection apparatus. A preform molding station for injection-molding a preform, and a blow molding station for stretch-blow molding a container from the preform,
The preform molding station includes an injection molding unit connected to an injection device, a preform take-out unit for taking out the preform, and a rotary conveyance unit that rotates and conveys the preform from the injection molding unit to the preform take-out unit. Have
The injection molding part and the preform take-out part are arranged in parallel in a direction orthogonal to the injection device,
The injection molding section performs injection molding of a plurality of preforms in parallel with the injection apparatus, and the rotary conveying means arranges the plurality of injection molded preforms in parallel with the injection apparatus at a preform take-out section. And
The blow molding station is arranged in parallel with the injection device and conveys the preform along the injection device. In claim 1 or 2,
The blow molding station has a plurality of processing units, and a conveying unit that conveys a preform or a container to the plurality of processing units,
An injection stretch blow molding apparatus, wherein the conveying means is movable in a blow molding station in a direction parallel to the injection apparatus. In claim 3,
The plurality of processing units include a heating unit for heating the preform taken out from the preform extraction unit, a blow molding unit for blow molding the preform heated by the heating unit into a container shape, and the blow molding unit An injection stretch blow molding apparatus, which is a container take-out portion for taking out a container molded in step (1). In claim 3,
2. The injection stretch blow molding apparatus according to claim 1, wherein the conveying means spans a plurality of processing parts and can be opened and closed with respect to the preform or the neck part of the container. In claim 5,
An injection stretch blow molding apparatus, wherein a receiving member for receiving the preform is disposed in the preform take-out part, and the receiving member is movable to the heating part. In claim 6,
An injection stretch blow molding apparatus, wherein the receiving member is a cooling pot. In claim 6,
The heating unit includes a heating box disposed above the conveying means, and a preform holding means receives a preform from the receiving member, a heating position in the heating box, and a delivery position to the conveying means. An injection stretch blow molding apparatus characterized by being capable of moving up and down.

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