JP6541113B2 - Three-dimensional blow molding apparatus and method of manufacturing molded product - Google Patents

Description

  The present invention relates to a three-dimensional blow molding apparatus and method for producing a molded article, in which a parison extruded from an injection device is disposed along a transversely placed mold.

  In three-dimensional blow molding, the parison extruded from the injection device is generally manually placed by the operator along the shape of the cavity formed in the transverse mold.

  Recently, a technology is known in which a parison can be arranged along the cavity shape of a horizontally placed mold by making the mold apparatus and the injection apparatus relatively movable (for example, Patent Document) 1).

Registered Utility Model No. 3007380

  However, the above three-dimensional blow molding has the following problems. That is, it is necessary for the worker to arrange the parison along the cavity shape of the mold. In addition, the three-dimensional blow molding apparatus arranges the parison along the shape of the cavity by relatively moving the mold apparatus and the injection apparatus, but at this time, a part that is arranged offset from the parison cavity The operator needs to manually press to adjust the position of the parison.

  For this reason, three-dimensional blow molding increases labor cost and increases manufacturing costs, and there is a possibility that productivity may be affected by the degree of skill of the operator. In the parison, where a thermoplastic resin material is used, the temperature of the parison when the worker carries out the work is high, and the worker needs to wear gloves and the like having heat insulation, and the workability is poor. There is also the problem of. For this reason, three-dimensional blow molding requires a technique capable of automating the arrangement of parisons.

  Then, an object of this invention is to provide the manufacturing method of the three-dimensional blow molding apparatus which can arrange | position a parison in a metal mold | die, and a molded article.

The three-dimensional blow molding apparatus according to the present invention comprises a mold having an upper mold and a lower mold, a die head for pushing a parison in the direction of gravity, a fixture for fixing the parison pushed out from the die head to the lower mold, 1 base, a first connection portion provided on one main surface of the first base portion, and is formed in a rectangular pillar, is openably formed in a direction away and close the opposing surfaces to each other, of the first base portion A first tool having a pair of rod-like members provided on the other main surface side,
The lower connecting member includes a connected portion to which the first connecting portion is detachably connected, and the transfer means for moving the first tool, and the tip of the parison pushed out from the die head by using the fixing tool. by pressing on the parison is fixed with closing the front Symbol a said distance from the distal end of a given said parison that is secured to the lower mold, and the parison is positioned between the pair of rod-like members The first tool is moved to the position to close and hold the parison by closing the pair of rod-like members , and the parison is separated from the die head by moving the first tool by the transport means. and the parison is at a height in contact with the lower mold cavity, by moving the first tool along said lower mold cavity shape, the lower the parison And press the predetermined position of the parison disposed in the cavity of the lower die into the cavity of the lower die using the end faces of the pair of rod-like members, And a control unit that clamps the mold .

The method for producing a molded article according to the present invention comprises the steps of: pushing a parison from a die head in the direction of gravity; and pressing the tip of the parison pushed out of the die head against the lower mold of a mold having upper and lower molds. A step of closing and fixing the parison, a first base, a first connection portion provided on one of the main surfaces of the first base, and a direction formed by forming a rectangular column and facing mutually opposing surfaces A transport means having a connected portion detachably connected to the first connection portion, the first tool having a pair of rod-like members formed openably and closably and provided on the other main surface side of the first base to connect to, a said distance from the distal end of a given said parison that is secured to the lower die, and a step of moving to the position where the parison is disposed between the pair of rod-like members, the one By closing the rod-like member, said the steps of gripping with closing the parison, by moving the first tool by the conveying means, a step of dividing the parison from the die head, the first tool at a height parison in contact with the lower mold cavity, it is moved along said lower mold cavity shape, and a step in which to place the parison in the lower die cavity, is disposed on the lower die cavity And pressing the predetermined position of the parison into the cavity of the lower mold using the end faces of the pair of rod-like members, and clamping the lower mold and the upper mold .

  According to the present invention, it is an object of the present invention to provide a three-dimensional blow molding apparatus capable of arranging a parison in a mold and a method of manufacturing a molded product.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the structure of the three-dimensional blow molding apparatus which concerns on one Embodiment of this invention. The perspective view which shows the lower mold | type used for the three-dimensional blow molding apparatus. The perspective view which shows the structure of the 1st tool detachably attached to the arm used for the three-dimensional blow molding apparatus. The perspective view which shows the structure of the 2nd tool detachably attached to the arm used for the three-dimensional blow molding apparatus. Explanatory drawing which shows the structure of a part of three-dimensional blow molding apparatus. Explanatory drawing which shows the structure of a part of three-dimensional blow molding apparatus. Explanatory drawing which shows the structure of a part of three-dimensional blow molding apparatus. Explanatory drawing which shows the structure of a part of three-dimensional blow molding apparatus. Explanatory drawing which shows the structure of a part of three-dimensional blow molding apparatus. Explanatory drawing which shows the structure of a part of three-dimensional blow molding apparatus. Explanatory drawing which shows the structure of the metal mold | die of the three-dimensional blow molding apparatus. Explanatory drawing which shows the structure of a part of three-dimensional blow molding apparatus. The flowchart which shows the manufacturing process of the molded article using the same three-dimensional blow molding apparatus.

  Hereinafter, a three-dimensional blow molding apparatus 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 12.

  FIG. 1 is a perspective view showing the configuration of a three-dimensional blow molding apparatus 1 according to an embodiment of the present invention. FIG. 2 is a perspective view showing a lower die 23 a used in the three-dimensional blow molding apparatus 1. FIG. 3 is a perspective view showing the configuration of the first tool 63 a detachably attached to the holding device 51 used in the three-dimensional blow molding apparatus 1. FIG. 4 is a perspective view showing the configuration of the second tool 63 b detachably attached to the holding device 51 used in the three-dimensional blow molding apparatus 1. FIG. 5 is an explanatory view showing a part of the configuration of the three-dimensional blow molding apparatus 1. FIG. 6 is an explanatory view showing a part of the configuration of the three-dimensional blow molding apparatus 1. FIG. 7 is an explanatory view showing a part of the configuration of the three-dimensional blow molding apparatus 1. FIG. 8 is an explanatory view showing a part of the configuration of the three-dimensional blow molding apparatus 1. FIG. 9 is an explanatory view showing a part of the configuration of the three-dimensional blow molding apparatus 1. FIG. 10 is an explanatory view showing a part of the configuration of the three-dimensional blow molding apparatus 1. FIG. 11 is an explanatory view showing the configuration of the mold 23 of the three-dimensional blow molding apparatus 1. FIG. 12 is an explanatory view showing a part of the configuration of the three-dimensional blow molding apparatus 1.

  As shown in FIG. 1, the three-dimensional blow molding apparatus 1 includes a mold apparatus 11, an injection apparatus 12, an operation mechanism 13, and a control unit 14.

  The three-dimensional blow molding apparatus 1 is installed, for example, in a factory. The three-dimensional blow molding apparatus 1 arranges the parison 100 extruded from the injection apparatus 12 along the cavity shape formed in the lower mold 23a of the mold 23 arranged in the mold apparatus 11, and the mold together with the upper mold 23b. By tightening, it is possible to manufacture a hollow molded article 200 having a plurality of bends. The molded product 200 is, for example, a duct used in a car or the like.

  The parison 100 is a thermoplastic resin material formed in a cylindrical shape and in a softened state. The parison 100 is heated in the injection device 12 and pushed out from the die head 41 to the mold device 11 in a softened state. The parison 100 is divided at a predetermined length position from the tip end portion 101a. Here, the predetermined length position is, for example, a position where the length from the tip portion 101a of the parison 100 pushed out from the die head 41 in the direction of gravity is slightly longer than the length of the first cavity 31a. The parison 100 is formed to be able to maintain a hollow shape by supplying a gas to the cylindrically formed internal space. That is, the parison 100 divided at the predetermined length position is divided at the predetermined length position, and the tip end and the inner surface of the opening are closely attached and closed at the division position, whereby the gas is filled. It has a hollow portion 101b.

  The mold apparatus 11 is configured to be able to mold the molded article 200 by clamping the parison 100 supplied from the injection apparatus 12 into the mold apparatus 11. Specifically, the mold apparatus 11 includes a base 21, a mounting table 22, and a mold 23.

  The base 21 is installed on a floor surface of a factory, and is configured such that the mounting table 22 can be installed on the upper surface 21 a.

  The mounting table 22 has two plate-shaped first members 22 a and second members 22 b. The first member 22 a is fixed to the base 21 in a posture in which one main surface faces the upper surface 21 a of the base 21. The second member 22 b is, for example, a plate-like member having a main surface having the same shape as the main surface of the first member 22 a. The second member 22b is provided to face the main surface of the first member 22a, and is disposed so as to overlap the first member 22a. The second member 22 b is configured to be rotatable along the main surface with the center of the main surface of the first member 22 a as an axis. The lower mold 23a of the mold 23 is provided on the main surface of the second member 22b opposite to the main surface facing the first member 22a.

  The mold 23 has a lower mold 23a and an upper mold 23b. The mold 23 is configured to be able to mold the molded article 200 by clamping the lower mold 23 a and the upper mold 23 b. The mold 23 is formed by the lower mold 23 a and the upper mold 23 b, and constitutes a cavity 31 which constitutes a space of the shape of the molded product 200 and a hole 32 which arranges a bracket 110 used for the molded product 200. In addition, the shape of the cavity 31 shown to this embodiment is an example, is not limited to this shape, It forms in various shapes by the shape of the molded article shape | molded.

  The lower mold 23a is disposed laterally on the main surface of the second member 22b. The lower die 23a has a first cavity 31a constituting a part of the cavity 31 on the surface facing the upper die 23b, and a hole 32 attached to the outer peripheral surface of the parison 100 for disposing the outwardly projecting bracket 110 And. The lower die 23 a has a first side surface portion 37 and a second side surface portion 38 facing each other in the arrangement direction of the parison 100. In the present embodiment, as shown in FIG. 1, two lower molds 23a are arranged symmetrically on the main surface of the second member 22b.

  As shown in FIG. 2, in the present embodiment, the first cavity 31 a has a diameter reducing portion 33, a first bending portion 34, a second bending portion 35, and a third bending portion 36. The reduced diameter portion 33 is a portion formed thinner than the outer diameter of the parison 100. The first curved portion 34, the second curved portion 35, and the third curved portion 36 are portions in which a groove forming the first cavity 31a is bent along a surface facing the upper die 23b.

  The upper die 23 b is provided on the opposite side of the operation mechanism 13 of the base 21 via the injection device 12. The upper mold 23 b is provided with a second cavity 31 b formed in a shape of a part of the molded product 200 on the surface facing the lower mold 23 a. The upper mold 23b is combined with the lower mold 23a to form a cavity 31 together with the lower mold 23a.

  The injection device 12 is configured to be able to supply the parison 100 to the mold device 11. The injection device 12 includes a die head 41 and a gas supply unit 42. The die head 41 is, for example, disposed so as to be capable of reciprocating in one direction from the first side surface portion 37 to the second side surface portion 38 of the lower die 23 a at a position facing the second member 22 b.

  The gas supply unit 42 is configured to be able to supply a gas to the internal space of the parison 100 pushed out of the die head 41.

  The operation mechanism 13 includes a gripping device 51, a tool base 52, a bracket base 53, a fixture 54, and a storage unit 55.

  The gripping device 51 includes, for example, as shown in FIG. 1, a transport means comprising a plurality of rotatably formed joints. The gripping device 51 is configured so as to be detachably attachable to a plurality of shaped tools for gripping an object at its tip. The gripping device 51 shown in the present embodiment is a so-called robot arm. The gripping device 51 has a pedestal 61, a transport means 62 and a tool 63.

  The holding device 51 is configured to be able to arrange the parison 100 pushed out in the direction of gravity from the die head 41 along the shape of the first cavity 31 a of the lower die 23 a. In addition, the gripping device 51 is configured to be able to arrange the bracket 110 in the first cavity 31 a before the parison 100 is arranged.

The pedestal 61 is a portion on which the transport means 62 is installed, and is fixed to the tool stand 52. For example, the pedestal 61 is provided adjacent to the base 21.
The transport means 62 has, for example, a plurality of arms and joints. The transport means 62 has a drive for driving the arms and joints. Specifically, the transport means 62 can freely rotate among the structures of the pedestal 61, the lower arm 62a attached to the pedestal 61, the upper arm 62b attached to the lower arm 62a, and the pedestal 61, the lower arm 62a and the upper arm 62b. It has a pivot shaft 62c to be connected, and a drive unit for rotating the lower arm 62a and the upper arm 62b around the pivot shaft 62c. In addition, the transport means 62 has a connected portion 62d rotatably attached to the tip of the upper arm 62b.

  The tool 63 is configured to be attachable to and detachable from the connected portion 62 d provided at the tip of the transfer means 62. For example, a plurality of different tools are used as the tool 63. A plurality of tools 63 may be attached to the connected portion 62 d depending on the application. For example, the tool 63 includes a first tool 63a shown in FIG. 3 and a second tool 63b shown in FIG. Besides the above, it is also possible to use various shaped tools depending on the shape of the molded product 200, the shape of the bracket 110, and the like.

  The first tool 63a is provided on the base 71 and one of the main surfaces of the base 71, and is provided on the other main surface side of the connection portion 72 configured to be attachable to and detachable from the connected portion 62d. And 71 a pair of rod-like members 73 attached openably and closably. The first tool 63 a is configured to be able to grip the parison 100 by closing the pair of rod-like members 73.

  The base 71 is configured, for example, in a rectangular shape. The base 71 is configured to be able to drive the pair of rod-like members 73 by being connected to a drive unit using pneumatic pressure, hydraulic pressure, electricity, or the like.

  In the pair of rod-like members 73, the mutually facing side surfaces 73a of the rods extending in one direction are arranged in parallel. One end side of the pair of rod-like members 73 in the longitudinal direction is provided on the base 71. The pair of rod-like members 73 are configured to be able to approach or separate from each other in the direction orthogonal to the longitudinal direction. The pair of rod-like members 73 can hold the parison 100 disposed between the side surfaces 73a facing each other by closing the side surfaces 73a facing each other, and the inner surface of the parison 100 is closely attached at the holding position. Is configured to be able to close. Further, the pair of rod-like members 73 is formed with an end face 72 b of a size that allows the parison 100 to be moved by pressing the parison 100 against its tip. In the present embodiment, for example, the pair of rod-like members 73 are formed of prismatic members formed long in one direction.

  For example, as shown in FIG. 5, the second tool 63 b is configured to be able to grip the bracket 110 and to arrange the bracket 110 in the hole 32. The second tool 63 b does not interfere with the other bracket 110 when gripping the bracket 110, and the bracket 110 can be easily arranged in the hole 32 provided in the cavity. Specifically, the second tool 63 b is provided on the base 81 and one of the main surfaces of the base 81, the connecting portion 82 configured to be attachable to and detachable from the connected portion 62 d, and the other main surface of the base 81. And a pair of claws 83 attached to the base 81 openably and closably.

  The base 81 is formed, for example, in a rectangular shape. The base 81 is configured to be able to drive the pair of claws 83 by being connected to a drive unit using pneumatic pressure, hydraulic pressure, electricity, or the like.

  The pair of claw portions 83 is a holding portion formed on the other main surface side of the base 81 so as to be able to hold the bracket 110 attached to the outer surface of the parison 100. The pair of claws 83 is configured by arranging in parallel along the longitudinal direction two rod members elongated in one direction, which are formed to be gradually narrowed toward the tip. The pair of claws 83 are configured to be capable of coming into contact with each other in the direction orthogonal to the longitudinal direction. The claw portion 83 has a gripping surface 83a and an inclined surface 83b. The gripping surface 83 a is a surface facing each other of the pair of claws 83. The pair of claws 83 is configured to be able to grip the bracket 110 at the tip of the gripping surface 83a by moving in the direction in which the claws 83 approach each other. The inclined surface 83b is a surface which inclines toward the gripping surface 83a from the middle portion in the longitudinal direction of the claw portion 83 to the tip.

  On the tool stand 52, as shown in FIG. 1, a stand on which the tool 63 not attached to the transfer means 62 is placed, and a gripping device 51 are provided. A table on which the tool 63 which is not attached to the transfer means 62 is placed is provided within the turning range of the connected portion 62 d of the transfer means 62. As a result, the transport means 62 is moved by the control unit 14 so that the tool 63 can be appropriately replaced.

  The bracket base 53 is a base for arranging the brackets 110 arranged in the mold 23 when the molded product 200 is formed. The bracket base 53 is provided, for example, at a position facing the base 21 via the gripping device 51.

  As shown in FIG. 1, the fixture 54 is provided on the main surface of the second member 22b and adjacent to the first side surface portion 37 on one end side of the lower die 23a. The fixing tool 54 closes the opening of the tip portion 101 a of the parison 100 by sandwiching the tip portion 101 a of the parison 100 pushed out from the die head 41 with the first side surface portion 37 of the lower mold 23 a. The front end portion 101a of the lower mold 23a is configured to be fixable to the lower die 23a. The first side surface portion 37 on one end side of the lower die 23a is a side surface portion of the lower die 23a on the injection device 12 side when the parison 100 is pushed out from the die head 41.

  The fixture 54 is configured to be able to fix the distal end portion 101 a of the parison 100 pushed out from the die head 41 to the lower mold 23 a and to close the opening of the distal end portion 101 a of the parison 100. Specifically, the fixture 54 includes an actuator 54a and a pressing plate 54b. The actuator 54 a is configured to be capable of moving the pressing plate 54 b toward the first side surface portion 37. The pressing plate 54 b is fixed to the tip of a rod member provided on the actuator 54 a in a posture in which the main surface faces the first side surface portion 37. The pressing plate 54 b presses the parison 100 inserted between the pressing plate 54 b and the first side surface portion 37 and is configured to be able to close the opening of the tip portion 101 a of the parison 100.

  The storage unit 55 is configured to be able to temporarily store after removing the molded product 200 clamped by the mold apparatus 11 from the mold 23. The storage unit 55 is provided, for example, at a position facing the mold apparatus 11 via the gripping device 51. In the present embodiment, the storage unit 55 is provided adjacent to the bracket base 53.

  The control unit 14 is configured to be able to control the mold device 11, the injection device 12, and the gripping device 51. Specifically, the control unit 14 operates to move the lower mold 23a from the position where the parison 100 is disposed to the position where the upper mold 23b is clamped with the upper mold 23b by rotating the second member 22b of the mold apparatus 11 Control. Further, the control unit 14 is configured to be able to control the mold clamping operation of the mold 23 by opening and closing the lower mold 23 a and the upper mold 23 b.

  Further, the control unit 14 is configured to be able to control the position of the die head 41, the extrusion speed of the parison 100, the extrusion position, the gas supply amount, and the like.

  Further, the control unit 14 arranges the holding device 51 in the lower mold 23a of the bracket 110, holds the parison 100 pushed out of the die head 41, holds the parison 100 held along the shape of the first cavity 31a, and lowers it. An arrangement operation to be arranged at 23a and an operation to partially push the parison 100 arranged at the first cavity 31a can be controlled in accordance with the shape of the first cavity 31a. Further, the control unit 14 can control the operation of taking out the molded article 200 formed after clamping the mold 23 from the lower mold 23 a and transferring the molded article 200 to the storage unit 55 by controlling the gripping device 51. Configured

  The control unit 14 is pushed out from the die head 41 and has a predetermined distance from the tip portion 101a of the parison 100 whose tip is fixed to the lower die 23a, and a position where the parison 100 is disposed between the pair of rod members 73. The first tool 63a is configured to be movable. Further, the control unit 14 holds the parison 100 by closing the pair of rod-like members 73, and at a height at which the parison 100 contacts the first cavity 31a of the lower die 23a, along the shape of the first cavity 31a. The first tool 63a is configured to be movable.

  Next, a method of manufacturing a molded article 200 using the three-dimensional blow molding apparatus 1 configured as described above will be described. In the present embodiment, as shown in FIG. 1, the method for manufacturing the molded article 200 is described below using a configuration in which two lower molds 23a are disposed on the main surface of the second member 22b. However, the arrangement of the lower mold 23a is not limited to this. For example, two or more lower molds 23a can be provided on the main surface of the second member 22b.

  Further, in the present embodiment, as an example of a molded product, a method of manufacturing the molded product 200 having a plurality of bent portions and one bracket 110 attached to the outer circumferential surface of the parison 100 will be described. In addition, the shape of a molded article is not restricted to this, It can manufacture similarly about a molded article without the bracket 110, a molded article provided with the several bracket 110, etc. FIG.

  First, the control unit 14 controls the gripping device 51 to attach the second tool 63 b to the connected portion 62 d. Next, the control unit 14 controls the gripping device 51 and takes one bracket 110 from the bracket table 53. As shown in FIG. 5, the control unit 14 operates the transport means 62 of the gripping device 51, and arranges the bracket 110 gripped in the hole 32 provided in the lower die 23a (step ST1).

  At this time, the control unit 14 performs an operation by selecting an appropriate second tool 63 b according to the shape of the bracket 110 and attaching it to the connected portion 62 d.

  Next, the control unit 14 operates the gripping device 51 to replace the tool 63. Specifically, the control unit 14 removes the second tool 63 b from the connected portion 62 d and attaches the first tool 63 a to the connected portion 62 d.

  Next, the control unit 14 drives the die head 41 of the ejection device 12 toward the lower die 23a along the main surface of the second member 22b (step ST2).

  When the die head 41 moves to the position between the lower die 23 a and the fixture 54, the control unit 14 temporarily stops the die head 41. The control unit 14 starts the injection operation of the resin material of the injection device 12, and starts the extrusion of the parison 100 from the die head 41 (step ST3).

  At this time, gas is supplied from the gas supply unit 42 to the internal space of the parison 100 pushed out of the die head 41. As shown in FIG. 6, the parison 100 pushed out of the die head 41 is pushed out in the direction of gravity and descends toward the second member 22b.

  When the tip portion 101a of the parison 100 pushed out from the die head 41 reaches the position between the lower die 23a and the fixture 54, the control unit 14 sets the pressing plate 54b of the fixture 54 as shown in FIG. The parison 100 is moved toward the one side surface portion 37, and is fixed by sandwiching the parison 100 between the pressing plate 54b and the first side surface portion 37 (step ST4).

  At this time, the control unit 14 closes the opening on the tip end side of the parison 100 by pressing the tip portion 101a of the parison 100 against the first side surface portion 37 of the lower die 23a using the fixing tool 54, and the lower die 23a. The distal end portion 101 a of the parison 100 is fixed to the

  Next, as shown in FIG. 8, the control unit 14 moves the die head 41 along the X direction. Specifically, the control unit 14 moves the die head 41 along the main surface of the second member 22b from the first side surface 37 side of the lower mold 23a toward the second side surface 38 above the lower mold 23a. It is moved (step ST5).

  At this time, the control unit 14 controls the driving of the injection device 12 to move the die head 41 while pushing the parison 100 out to the lower die 23 a from the die head 41 at a predetermined extrusion speed.

  A part of the parison 100 is disposed along the first cavity 31a of the lower die 23a by such movement of the die head 41 (step ST5).

  Next, the control unit 14 stops the movement of the die head 41 and the pushing operation of the parison 100 at a predetermined stop position (step ST5). Here, the predetermined stop position is, for example, a position closer to the fixing tool 54 than a position where the shape of the first cavity 31a is curved in the Z direction in the lower mold 23a, as shown in FIG. Further, the length of the pushed-out parison 100 at the stop position is set, for example, slightly longer than the entire length of the first cavity 31 a in which the parison 100 is disposed.

  Next, as shown in FIG. 8 and FIG. 9, the control unit 14 causes the transport means 62 to stand by at a predetermined distance from the tip end portion 101 a and at a position facing the parison 100. Start moving. The control unit 14 moves the first tool 63a and sandwiches the parison 100 at a predetermined position, thereby grasping the parison 100 and closing the parison 100 by bringing the inner surface of the parison 100 into close contact (step ST6).

  At this time, the control unit 14 adjusts the gripping force of the pair of rod-like members 73 of the first tool 63a, and presses the parison 100 with a predetermined force at a predetermined position of the parison 100, thereby the end of the parison 100 Block the Thereby, the control unit 14 prevents the gas from leaking out from the inside of the held parison 100.

  Next, the control unit 14 controls the transfer means 62 and moves the first tool 63 a in a direction orthogonal to the axial direction of the parison 100 to take the parison 100 from the die head 41. The control unit 14 controls the operation of the transport means 62 and arranges the parison 100 along the first cavity 31a (step ST7). For example, in the first cavity 31a of the lower die 23a, as shown in FIG. 9, the control unit 14 conveys so that the parison 100 is disposed along the first cavity 31a through the first curved portion 34. Move the means 62. Subsequently, the control unit 14 moves the transport means 62 so that the parison 100 is disposed along the first cavity 31 a through the second bending portion 35. Subsequently, the control unit 14 moves the transfer means 62 so that the parison 100 passes through the third curved portion 36 and is disposed along the first cavity 31 a.

  Thus, as shown in FIG. 10, the control unit 14 controls the conveying means 62 so that the parison 100 passes through the first curved portion 34, the second curved portion 35, and the third curved portion 36. The parison 100 is disposed so as to conform to the shape of the first cavity 31a.

  In addition, the dividing method from the die head 41 of the parison 100 is not restricted to said method. For example, it is also possible to separate the parison 100 from the die head 41 by relatively moving the die head 41 and the first tool 63a.

  Next, the control unit 14 adjusts the arrangement position and the shape of the parison 100 arranged along the shape of the first cavity 31a (step ST8). For example, a first tool 63a is used for this work.

  Specifically, the control unit 14 adjusts the arrangement position and the shape of the parison 100 at the positions shown by the arrows P and Q in FIG. For example, in the reduced diameter portion 33 of the first cavity 31a, the control unit 14 controls the first tool 63a to press the side surface of the parison 100 using the end surface 72b of the rod-like member 73 at the position indicated by the arrow P. Then, the parison 100 is accommodated in the cavity 31.

  Further, in the first bending portion 34, the second bending portion 35, and the third bending portion 36, the control unit 14 controls the first tool 63a, and for example, as shown by the arrow Q, the bending parison 100 is a rod-like member The end face 72b of the third part 73 is pressed into the first cavity 31a.

  Next, the control unit 14 rotates the second member 22b of the mold apparatus 11 to move the lower mold 23a to the mold clamping position facing the upper mold 23b. As shown in FIG. 11, after stopping the lower mold 23a at the mold clamping position, the control unit 14 performs the mold clamping operation by closing the lower mold 23a and the upper mold 23b (step ST9). In the present embodiment, the control unit 14 is configured to start the operation of arranging the above-mentioned bracket 110 on the other lower die 23a while one lower die 23a is performing the mold clamping operation. Thereby, the three-dimensional blow molding apparatus 1 enables the manufacture of the molded article 200 efficiently.

  Next, as shown in FIG. 12, the control unit 14 separates the upper mold 23b from the lower mold 23a, and brings the mold 23 into an open state. Thereafter, the control unit 14 rotates the second member 22 b to move the lower mold 23 a on which the mold clamping operation is finished to the holding device 51 side.

  At this time, the control unit 14 replaces, for example, the tool 63 attached to the transport means 62 with a tool 63 for taking out the molded article 200.

  Next, the control unit 14 operates the gripping device 51 to take out the molded product 200 from the lower mold 23a and move it to the storage unit 55 (step ST10).

  Thereafter, a plurality of molded articles 200 are manufactured by repeating the same process.

  According to the three-dimensional blow molding apparatus 1 configured as described above, when the parison 100 is taken from the die head 41, the end portion of the parison 100 can be gripped while closing it, so the gas filled in the internal space Never get out. For this reason, the three-dimensional blow molding apparatus 1 is disposed in the mold 23 because there is no risk that the gas will escape from the inside of the parison 100 and the parison 100 will collapse when the parison 100 is disposed in the lower mold 23a. The parison 100 can be shaped as designed.

  Further, according to the three-dimensional blow molding apparatus 1, the parison 100 gripped by the tool 63 can be freely disposed along the shape of the first cavity 31a of the lower mold 23a by controlling the operation of the conveying means 62. is there. For this reason, the three-dimensional blow molding apparatus 1 can freely arrange the parison 100 in accordance with the shape of the complex cavity 31.

  The rod-like member 73 of the first tool 63a attached to the transport means 62 is configured to grip the parison 100 at the central portion of the surfaces facing each other. For this reason, stress is concentrated on a part of the parison 100, there is no possibility that the parison 100 is cut and the parison 100 falls. The rod-like member 73 is configured to close and hold a predetermined length position from the tip end portion 101 a of the parison 100 pushed out from the die head 41. Therefore, the control unit 14 can separate the parison 100 from the die head 41 without leaking the gas from the internal space of the parison 100 by a simple operation of moving the transport means 62 in the direction orthogonal to the axial direction of the parison 100. it can.

  In addition, the three-dimensional blow molding apparatus 1 is configured to be able to adjust the arrangement position and the shape of the parison 100 disposed in the first cavity 31 a at the tip end of the rod-like member 73. Therefore, for example, even when the width of the cavity 31 formed in the mold 23 has the reduced diameter portion 33 whose diameter is smaller than the outer diameter of the parison 100, after the parison 100 is disposed in the first cavity 31a. The parison 100 can be accommodated in the cavity 31 by pushing the parison 100 disposed in the reduced diameter portion 33 toward the first cavity 31 a at the end face 72 b or the side face of the rod-like member 73. Thereby, the three-dimensional blow molding apparatus 1 can reduce the occurrence of burrs of the molded article 200. Moreover, since the three-dimensional blow molding apparatus 1 can store the parison 100 in the cavity 31, the thickness of the reduced diameter portion 33 or the like can be made uniform.

  Further, the three-dimensional blow molding apparatus 1 is configured to push the parison 100 with the end face 72b of the first tool 63a. Thereby, the three-dimensional blow molding apparatus 1 can press the parison 100 with a surface having a predetermined area. For this reason, the three-dimensional blow molding apparatus 1 can suppress stress concentration on the tip and can push the parison 100 toward the cavity 31 without making a hole in the parison 100 disposed in the cavity 31. It is possible to prevent the gas from leaking from the parison 100 at the time of adjustment of the arrangement of 100.

  Similarly, in the curved portions 34, 35, 36, after the parison 100 is disposed in the cavity 31, the burrs of the molded article 200 can be obtained by pushing the outer surface of the curved portions 34, 35, 36 with the tool 63. While preventing generation | occurence | production, the thickness of the molded article 200 can be controlled uniformly. In addition, the position which pushes the parison 100 is not limited to said position, It can adjust suitably with the shape of the 1st cavity 31a.

  Further, the three-dimensional blow molding apparatus 1 is configured to arrange the bracket 110 in the hole in the cavity of the mold 23 using the holding device 51. Thereby, the three-dimensional blow molding apparatus 1 can automate the arrangement of the bracket 110. Moreover, the three-dimensional blow molding apparatus 1 can make the installation angle and the installation position of the bracket 110 uniform. For this reason, the three-dimensional blow molding apparatus 1 can eliminate variations in the installation position of the bracket 110 attached to the molded article 200.

  Further, the three-dimensional blow molding apparatus 1 is configured to arrange the parison 100 and the bracket 110 by using a gripping device 51 configured to be able to replace a plurality of tools 63. Therefore, by replacing the tool 63, molded articles 200 having different shapes can be easily manufactured.

  As described above, according to the three-dimensional blow molding apparatus 1 according to the embodiment of the present invention, a molded article can be easily manufactured stably with excellent productivity.

  The present invention is not limited to the above embodiment. For example, the arrangement of the gripping device 51 of the operation mechanism 13, the tool stand 52, the bracket stand 53, and the storage unit 55 is not limited to the above arrangement. It can design suitably in consideration of arrangement of die device 11, arrangement of injection device 12, arrangement of grasping device 51, etc.

  Moreover, the mounting base 22 is not limited to the said embodiment. That is, the mounting table 22 moves the lower mold 23a to the mold clamping position by rotating the mold 23. However, the invention is not limited thereto. For example, the mounting table 22 moves to the mold clamping position by moving along the upper surface of the base. It is also possible to make it move.

  Further, the structure of the gripping device is not limited to the gripping device 51. For example, in the three-dimensional blow molding apparatus 1, it is also possible to use an arm having more joints than the conveying means 62. In addition, as long as the above-described operation can be performed, the gripping device is not limited to the above.

  Moreover, in this embodiment, although it is set as the structure which presses the front-end | tip part 101a of the parison 100 on the 1st side part 37 of the metal mold 23 using the fixing tool 54, it is not limited to this structure. For example, the distal end portion 101a of the parison 100 can be configured to close the opening of the distal end portion 101a and fix the parison 100 to the lower die 23a by sandwiching the distal end portion 101a using the first tool 63a.

  Moreover, in this embodiment, although the parison 100 comprised from one type of resin material is used, it is not restricted to this. For example, it can be used for so-called multilayer blow molding in which molding is performed using a parison in which plural types of resin materials are stacked.

  In the example described above, the configuration in which the parison 100 is disposed in the first cavity 31a by the movement of the die head 41 and the first tool 63a has been described, but the three-dimensional blow molding apparatus 1 The parison 100 may be arranged using the tool 63a. That is, in the step of arranging the parison 100 in the first cavity 31a, the switching position of the die head 41 and the first tool 63a is appropriately set according to the shape of the molded article 200 to be molded.

  Further, the three-dimensional blow molding apparatus 1 is not limited to the configuration in which the parison 100 is disposed in the first cavity 31 a in both of the die head 41 and the first tool 63 a. That is, the three-dimensional blow molding apparatus 1 may have a configuration in which the die head 41 is not moved, and the parison 100 may be disposed in the first cavity 31 a with only the first tool 63 a.

The present invention is not limited to the above embodiment, and can be variously modified in the implementation stage without departing from the scope of the invention. In addition, the embodiments may be implemented in combination as appropriate, in which case the combined effect is obtained. Furthermore, various inventions are included in the above-described embodiment, and various inventions can be extracted by a combination selected from a plurality of disclosed configuration requirements. For example, even if some configuration requirements are deleted from all the configuration requirements shown in the embodiment, the problem can be solved, and if an effect is obtained, a configuration from which this configuration requirement is removed can be extracted as the invention.
Hereinafter, the invention described in the claims at the beginning of the application of the present application is appended.
[1] A mold having an upper mold and a lower mold, a die head for extruding a parison in the direction of gravity, a base, a connecting portion provided on one of the main surfaces of the base, and rectangular prisms formed opposite to each other And a first tool having a pair of rod-like members provided on the other main surface side of the base, and a connected portion to which the connecting portion is detachably connected. Transport means for moving the first tool, and a predetermined distance from the tip of the parison pushed out from the die head and having its tip fixed to the lower die, and the parison has the pair of rod-like members The first tool is moved to a position to be disposed between the members, and the pair of rod-like members is closed to hold the parison, and at a height at which the parison contacts the cavity of the lower mold, the lower mold The key 3D blow molding apparatus and a control unit for moving the first tool along the Activity shape.
[2] The three-dimensional blow molding apparatus according to [1], wherein the control unit controls the transport unit and presses the parison disposed in the cavity toward the cavity with the rod-like member.
[3] A second tool comprising: the connection portion detachably formed on the connection portion; and a holding portion holding the bracket attached to the outer surface of the parison on the other main surface side of the base, The control unit connects the connecting portion of the second tool to the connected portion, holds the bracket by the holder, and inserts the bracket into a hole formed in the cavity by the transport unit. The three-dimensional blow molding apparatus according to [1], wherein the first tool is connected to the connected portion.
[4] The process of pushing a parison from the die head in the direction of gravity, and a predetermined distance from the tip of the parison which is pushed out of the die head and whose tip is fixed to the lower mold of the mold having upper and lower molds. And at a position where the parison is disposed between a pair of rod-like members, a base, a connecting portion provided on one of the main surfaces of the base, and a rectangular column, and separating and facing mutually opposing surfaces The first tool having a pair of rod-like members provided on the other principal surface side of the base by means of a conveying means having a connected portion detachably connected to the connecting portion And a step of holding the parison by closing the pair of rod-like members, and a lower tool having a height at which the first tool contacts the cavity of the lower mold. Method for producing a molded article comprising the step of moving along the tee shape, a.
[5] The method of manufacturing a molded article according to [4], further including the step of controlling the transport means and pressing the parison disposed in the cavity toward the cavity with the rod-like member.
[6] The connection of the second tool having the connection portion detachably formed on the connection portion, and the holding portion holding the bracket attached to the outer surface of the parison on the other main surface side of the base Connecting the first part to the connected part, holding the bracket by the holding part, inserting the bracket into the hole formed in the cavity by the conveying means, and the first tool And [4] the method for manufacturing a molded article according to [4].

  DESCRIPTION OF SYMBOLS 1 ... Dimension blow molding apparatus, 11 ... Mold apparatus, 12 ... Injection apparatus, 13 ... Operation mechanism, 14 ... Control part, 21 ... Base, 21a ... Upper surface, 22 ... Mounting base, 22a ... 1st member, 22b ... Second member, 23 mold, 23a lower mold, 23b upper mold, 31 cavity, 31a first cavity 31b second cavity 32 hole, 33 diameter-reduced portion 34 first curve Part 35: Second curved part 36: Third curved part 37: First side part 38: Second side part 41: Die head 42: Gas supply part 51: Gripping device 52: Tool stand 53: bracket base, 54: fixing member, 54a: actuator, 54b: pressing plate, 55: storage unit, 61: pedestal, 62: conveying means, 62a: lower arm, 62b, upper arm, 62c: pivot, 62d: covered Connection part, 63 ... tool, 63a ... first tool, 63 ... 2nd tool, 71 ... base, 72 ... connection part, 83a ... gripping surface, 72b ... end face, 73 ... rod-like member, 81 ... base, 82 ... connection part, 83 ... claw part, 100 ... parison, 101a ... tip part , 101b: hollow part, 110: bracket, 200: molded article.

Claims (5)

A mold having upper and lower molds,
With a die head that pushes the parison in the direction of gravity,
A fixing device for fixing the parison extruded from the die head to the lower mold;
A first base portion, a first connection portion provided on one of the main surfaces of the first base portion, and a rectangular column, which can be opened and closed in directions facing away from and adjacent to each other, the first base portion A first tool having a pair of rod-like members provided on the other main surface side of
Transport means for moving the first tool, having a connected portion to which the first connection portion is detachably connected;
Wherein the distal end of the parison extruded from the die head by pressing the lower mold using the fixture, fixed with closing the parison, before Symbol of the parison that is secured to the lower die the tip from a given a distance, and, said first tool to move to a position where the parison is disposed between the pair of rod-like members, by closing the pair of rod-shaped members, to grip with closing the parison, the The parison is separated from the die head by moving the first tool by the transfer means, and the first tool is formed along the lower mold cavity shape at a height at which the parison contacts the lower mold cavity. the move, placing the parison in said lower die cavity, the predetermined position of the parison disposed in the lower die cavity one And a control unit for using the end face of the rod member is pressed toward the lower mold cavity and clamping the lower mold and the upper mold,
Three-dimensional blow molding apparatus comprising:   The die head is configured to be movable in one direction along the main surface of the mounting table at a position facing the mounting table on which the lower die is provided.
  The lower mold cavity partially extends in the moving direction of the die head,
  The control unit is configured to fix the parison from the die head after the tip of the parison is fixed to the lower mold using the fixing tool and before the parison is gripped by the pair of rod-like members. The three-dimensional blow molding apparatus according to claim 1, wherein the die head is moved while being extruded, and the parison is disposed in the part of the lower mold cavity extending in the moving direction of the die head. The second base portion, provided on one main surface of the second base portion, the second connection section that will be formed freely the second base attached to and detached from the connected part, and the other of the second base portion of the main And a second tool having a holding portion for holding a bracket attached to the outer surface of the parison on the surface side,
The control unit connects the second connection portion of the second tool to the connected portion, holds the bracket by the holding unit, and the bracket is inserted into a hole formed in the cavity by the transport unit. The three-dimensional blow molding apparatus according to claim 1 or 2 , wherein the second tool is inserted from the connected portion, and the first tool is connected to the connected portion. Pushing the parison from the die head in the direction of gravity,
Closing and fixing the parison by pressing the tip of the parison extruded from the die head against the lower mold of a mold having an upper mold and a lower mold;
A first base portion, a first connection portion provided on one of the main surfaces of the first base portion, and a rectangular column, which can be opened and closed in directions facing away from and adjacent to each other, the first base portion the other first tool having a pair of rod-shaped members provided on the main surface side of the connected to the conveying means having a connected part, which is detachably connected to the first connection portion is fixed to the lower die a step wherein a said distance from the tip of a given parison, and, to be moved to a position where the parison is disposed between the pair of rod-like members,
Closing and gripping the parison by closing the pair of rod-like members;
Separating the parison from the die head by moving the first tool by the transport means;
In height the first tool the parison into contact with the lower mold cavity, are moved along said lower mold cavity shape, and a step in which to place the parison in the lower die cavity,
A step of pressing a predetermined position of the parison disposed in the cavity of the lower mold toward the inside of the cavity of the lower mold using the end faces of the pair of rod members, and clamping the lower mold and the upper mold When,
A method of producing a molded article comprising: The second base portion, provided on one main surface of the second base portion, the parison and the second connection section that will be removably formed on the connecting portion, and, on the other main surface side of the second base portion Connecting the second connection portion of the second tool having the holding portion for holding the bracket attached to the outer surface of the second portion to the connected portion;
Holding the bracket by the holder;
Inserting the bracket into a hole formed in the cavity by the transfer means; removing the second tool from the connected portion; and connecting the first tool to the connected portion;
The manufacturing method of the molded article of Claim 4 which comprises.