JP4796711B2 - Blow molding equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a blow molding device, and more particularly, to a blow molding device that takes out a molded product by a take-out device.
[0002]
[Background Art and Problems to be Solved by the Invention]
As a blow molding device, for example, an intermediate molded product such as a preform is conveyed along a conveyance path, and blow molding is performed on the intermediate molded product in the middle of the conveyance path to obtain a final molded product. A device that is taken out by the device is known.
[0003]
In this case, the intermediate molded product is conveyed in an inverted state on the conveyance path, and the take-out device reverses the inverted final molded product and places it on a conveyor outside the device, and the final molded product is carried out independently. Has been done.
[0004]
However, such a take-out device is not only a final molded product, but, for example, in a preform or a two-stage blow molding device for manufacturing a heat-resistant container, an intermediate between a primary blow molded product or a heat treated molded product after primary blow molding, etc. The molded product may be removed.
[0005]
In such a case, if the intermediate molded product is taken out onto the conveyor, the intermediate molded product cannot stand on its own, so it may stagnate on the conveyor and cause line stop or blow molding equipment to stop. It is necessary to take measures such as removing from the printer or attaching another discharge device.
[0006]
An object of the present invention is to provide a blow molding apparatus capable of preventing a line stop or an apparatus stop even when a molded product other than a final molded product is taken out by a take-out device.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the blow molding apparatus of the present invention includes a conveyance path for conveying an intermediate molded product,
At least one blow molding part that is provided in the middle of the conveyance path and blow-molds the intermediate molded product;
A take-out device for taking out the final molded product out of the apparatus from the conveyance path;
The take-out device selects only the final molded product and takes it out to an extraction position. When the intermediate molded product other than the final molded product has been conveyed, the intermediate molded product is discharged to a discharge position. And
[0008]
According to the present invention, only the final molded product is selected by the take-out device and taken out to the take-out position, and when the intermediate molded product other than the final molded product is carried out, the intermediate molded product is discharged to the discharge position. The intermediate molded product other than the final molded product is not supplied onto the take-out position of, for example, a conveyor. Therefore, the intermediate molded product other than the final molded product is stagnated on the conveyor or the like, and the line is stopped or the apparatus is stopped. It is possible to prevent the occurrence of such factors.
[0009]
In the present invention, the final blow-molded part has a discriminating means for discriminating the quality of molding,
When the molding is defective, the take-out device discharges the intermediate molded product to the discharge position.
[0010]
By adopting such a configuration, even if blow molding is performed by the final blow molding section, if molding is defective, the product will stagnate on the conveyor or the like, so an intermediate molded product at the time of molding failure By discharging to the discharge position, it is possible to more reliably prevent a cause such as a line stop or an apparatus stop.
[0011]
In the present invention, the conveyance path conveys the intermediate molded product or the final molded product in an inverted state,
The take-out device includes a gripping member for gripping the inverted intermediate molded product or the final molded product,
Elevating means for elevating the gripping member so that the intermediate molded product or the final molded product can be taken out from the conveyance path;
Reversing means for reversing the gripping member so that the intermediate molded product or the final molded product can be taken out in an upright state;
Advancing and retracting means for enabling the gripping member to advance and retract with respect to the transport path;
The advance / retreat means can stop the gripping member on the take-out position and the discharge position.
[0012]
By adopting such a configuration, the intermediate molded product or the final molded product in an inverted state is gripped by the gripping member, the intermediate molded product or the final molded product is taken out by the lifting means, and inverted by the reversing means. The gripping member can be taken out by the advancing / retreating means and stopped at the take-out position and the discharge position, and the final molded product is taken out on a conveyor or the like at the take-out position and carried out in a self-supporting state. The molded product can be reliably discharged to the discharge position.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0014]
1-3 is a figure which shows the blow molding apparatus concerning one embodiment of this invention.
[0015]
This blow molding apparatus 10 is a two-stage blow molding apparatus that molds a heat-resistant container. As shown in FIG. 3, a supply unit 12, a heating station 14, a transfer unit 16, and a blow molding station 18 are preformed. Are arranged in a straight line along the conveying direction A.
[0016]
The supply unit 12 aligns the preform 22 (see FIG. 2) continuously conveyed in an upright state by the supply rail 20 by the alignment mechanism 26, grips the neck portion 24 by the grip member 28, and reverses the transfer mechanism. Inverted by 30 and supplied to the heating station 14 in an inverted state.
[0017]
The heating station 14 heats the preform 22 supplied from the supply unit 12, conveys the preform 22 along the two first conveyance paths 32, and is conveyed on each first conveyance path 32. The preform 22 is heated by a heating box 34 disposed in each first conveyance path 32 while being rotated by a rotation mechanism (not shown), and is conveyed to the transfer unit 16.
[0018]
The transfer unit 16 converts the preform 22 heated by the heating station 14 into a pitch at the time of blow molding by the pitch changing mechanism 36 and transfers the preform 22 to the blow molding station 18 in an inverted state by the transfer mechanism 38. It is supposed to be.
[0019]
In the blow molding station 18, the receiving part 42 is arranged on the short side of the substantially rectangular second transport path 40 having the long side and the short side on the transfer part 16 side, and the primary blow molding part 44 is along one side of the long side. The primary heat treatment section 46, the secondary heat treatment section 48, and the final blow molding section 50 are disposed, and the take-out section 52 is disposed on the other short side facing the receiving section 42.
[0020]
In the second transport path 40, a transport chain 58 having a plurality of transport members 56 attached to four sprockets 54 arranged at the corners of the transport path is spanned, and the transport members 56 are guided to the transport rail 60.
[0021]
And the conveyance chain 58 is intermittently driven, and the conveyance member 56 is intermittently conveyed.
[0022]
Note that a preform support portion 62 that supports the neck portion 24 of the preform 22 in an inverted state is protruded from the transport member 56.
[0023]
The receiving unit 42 receives the preform 22 from the transfer unit 16 onto the conveying member 56, and the receiving conveying member 56 is intermittently stopped at the receiving unit 42.
[0024]
The primary blow molding unit 44 has a primary blow molding mechanism 64 on the second conveyance path 40, and a primary blow molding die 66 is clamped by the primary blow molding mechanism 64, and the preform 22 is biaxially stretch blow molded. Thus, a primary molded product is obtained.
[0025]
The primary heat treatment section 46 has a primary heat treatment mechanism 68 on the second conveyance path 40, and heats the primary molded product by clamping and pressurizing the heated heat treatment mold 70 with the primary heat treatment mechanism 68. ing.
[0026]
The secondary heat treatment section 48 has a secondary heat treatment box 72, and heats the intermediate molded product subjected to the primary heat treatment in the secondary heat treatment box 72.
[0027]
The final blow molding unit 50 has a final blow molding mechanism 74. The final blow molding mechanism 74 is used to clamp the final blow molding die 76, and the intermediate molded product is biaxially stretched by blow molding. Trying to get.
[0028]
The take-out part 52 has a take-out device 80 that takes the final molded product out of the blow molding device 10 from the second transport path 40 in a state of facing the second transport path 40.
[0029]
Further, as shown in FIG. 1 and FIG. 2, a belt conveyor 84 for conveying the final shaped product to the next line is disposed outside the blow molding apparatus 10, and is disposed between the belt conveyor 84 and the take-out device 80. A shooter 82 is disposed at the discharge position.
[0030]
In the next line, there are leak inspection, labeler, cleaning process, etc. In the case of a line that is transported while the container is self-supporting, the container after heat treatment may be obstructed in line transportation due to lying down, etc. In the case of a container after heat treatment even in a line that holds the film, it is expected that a conveyance failure will occur in the apparatus in the subsequent process.
[0031]
The take-out device 80 includes a gripping member 86, an elevating cylinder 88 as elevating means, a reversing actuator 90 as reversing means, and an advancing / retreating cylinder 92 as advancing / retreating means.
[0032]
A pair of gripping members 86 is provided, one set of two, and each pair of gripping members 86 is supported by a frame 94 and is paired with a pair of unillustrated opening / closing rods that are movable in conjunction with each other in opposite directions. And is opened and closed by operating one open / close rod by an open / close cylinder 98.
[0033]
The elevating cylinder 88 is fixed to the lower surface of the frame 94, the tip of the cylinder rod is fixed to the base 100, and the grip member 86 can be moved up and down by moving the frame 94 up and down.
[0034]
The base 100 can be moved forward and backward with respect to the second transport path 40 via the forward / backward rail 102.
[0035]
The reversing actuator 90 is attached to the frame 94 and rotates the gripping member 86 so that the molded product can be reversed from the second conveyance path 40 side to the outside of the apparatus.
[0036]
The advance / retreat cylinder 92 is attached to the machine base 104 side, and enables the base 100 to advance and retreat.
[0037]
And it waits in the state which retracted from the 2nd conveyance path 40 of the extraction part by the advancing / retreating cylinder 92, and the holding member 86 was opened toward the 2nd conveyance path 40.
[0038]
When the conveyance of the molded product is stopped in the second conveyance path 40, the gripping member 86 is advanced by the advance / retreat cylinder 92, is closed by the open / close cylinder 98, and the neck portion 24 of the molded product is gripped.
[0039]
In this state, the gripping member 86 is raised by the elevating cylinder 88, and the neck portion 24 is detached from the conveying member 56.
[0040]
Next, the gripping member 86 is reversed by the reversing actuator 90 to bring the molded product into an upright state.
[0041]
In this case, when the final blow molding is performed in the final blow molding unit 50, for example, it is assumed that the final blow molding is performed by a signal that the blow air valve of the final blow molding mechanism 74 is turned on. The final molded product 78 can be reliably taken out onto the belt conveyor 84 by moving 86 to the belt conveyor 84 and lowering it with the lifting cylinder 88 and opening the gripping member 86 with the opening / closing cylinder 98.
[0042]
Further, when the final blow molding is not performed in the final blow molding unit 50, for example, when the ON signal of the blow air valve of the final blow molding mechanism 74 is not confirmed, it is determined that the final blow molding has not been performed, and the advance / retreat is performed. If the holding member 86 is opened by the opening / closing cylinder 98 at that position, that is, a position on the shooter 82, without moving the holding member 86 by the cylinder 92, a molded product other than the final molded product 78, for example, a preform shown in FIG. 24, the primary molded product 106, or the intermediate molded product heated by the primary heating unit or the secondary heating unit (not shown) can be reliably discharged to the shooter 82.
[0043]
Accordingly, it is possible to prevent the delivery of the product other than the final molded product 78 on the belt conveyor 84.
[0044]
Further, it is detected whether or not the final blow molding has been performed successfully by a discrimination means for discriminating the quality of the molding provided in the final blow molding section 50, for example, a blow air pressure sensor or a blow air tank pressure sensor. If it is carried out, it may be taken out to the belt conveyor 84 and discharged to the shooter 82 if the molding is defective.
[0045]
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.
[0046]
For example, in the above-described embodiment, the heat-resistant container blow molding apparatus has been described. However, the present invention is not limited to this example, and can be applied to a normal container molding apparatus.
[0047]
Further, the present invention is not limited to the case of conveying in an upright state and taking out in an upright state, but is also applicable to the case of carrying in an upright state and taking out in an upright state.
[0048]
Furthermore, the present invention is not limited to the case where blow molding is performed a plurality of times, and can be applied to a case where the blow molding is performed only once.
[Brief description of the drawings]
1 is an essential part enlarged plan view of FIG. 3 showing a blow molding apparatus according to an embodiment of the present invention.
FIG. 2 is a side view of FIG.
FIG. 3 is a schematic plan view showing a blow molding apparatus according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Blow molding apparatus 40 2nd conveyance path 50 Final blow molding part 52 Taking out part 78 Final molded product 80 Taking out apparatus 82 Shutter 84 Belt conveyor 86 Grasping member 88 Lifting cylinder 90 Reverse actuator 92 Advancing and retracting cylinder

Claims (3)

A conveyance path for conveying the intermediate molded product;
At least one blow molding part that is provided in the middle of the conveyance path and blow-molds the intermediate molded product;
A take-out device for taking out the final molded product out of the apparatus from the conveyance path;
The take-out device determines that the molded product on the conveyance path is the final molded product based on a signal that the blow air valve of the final blow molding unit is turned on, and selects and removes only the final molded product. A blow molding apparatus characterized in that when the intermediate molded product other than the final molded product has been transported to a position, the intermediate molded product is discharged to a discharge position. In claim 1,
The final blow-molded part further has a discriminating means for discriminating the quality of molding,
The conveyance path conveys the intermediate molded product or the final molded product in an inverted state,
The take-out device is
A gripping member for gripping the inverted intermediate molded product or the final molded product;
Elevating means for elevating the gripping member so that the intermediate molded product or the final molded product can be taken out from the conveyance path;
Reversing means for reversing the gripping member so that the intermediate molded product or the final molded product can be taken out in an upright state;
Advancing and retracting means for enabling the gripping member to advance and retract with respect to the transport path;
In the case of molding failure, the take-out device is configured to discharge the defective final molded product to the discharge position without reversing the gripping member by the reversing unit and then moving by the advance / retreat unit. Blow molding equipment. In claim 1 ,
The conveyance path conveys the intermediate molded product or the final molded product in an inverted state,
The take-out device includes a gripping member for gripping the inverted intermediate molded product or the final molded product,
Elevating means for elevating the gripping member so that the intermediate molded product or the final molded product can be taken out from the conveyance path;
Reversing means for reversing the gripping member so that the intermediate molded product or the final molded product can be taken out in an upright state;
Advancing and retracting means for enabling the gripping member to advance and retract with respect to the transport path;
The blow molding apparatus characterized in that the advance / retreat means can stop the gripping member on the take-out position and the discharge position.

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