JP5649899B2 - Label supply core device and label supply method - Google Patents

Description

  The present invention relates to a label supply core device for supplying a label to an insert molding die and a label supply method for supplying a label to an insert molding die.

One method of manufacturing a resin product whose surface is decorated with figures, characters, etc. is insert molding, in which a label on which a figure, letters, etc. are drawn is loaded into a mold and then molded by filling the resin. .
Insert molding is widely used today because it is excellent in durability because the label and the resin can be molded integrally, and it is not necessary to provide a decoration step after molding.

  In order to insert-mold such a resin product in which the label and the resin are integrated, the label must be supplied to the mold every time the molding is performed. As described in the above, after the outer shape matches the molded product, the label is wrapped around a pseudo core having a large number of air intake holes and sucked and held, and then inserted into the cavity in the mold in that state In addition to releasing the suction hold, a method in which the mold side sucks the label and attaches the label to the cavity, or as described in Patent Document 2, a large number of fine shapes with a shape similar to the painted surface of the molded product. After adsorbing the film to the electrode plate by vacuum suction to the film carrier having the electrode plate with holes formed therein, the film carrier and the painting corresponding part of the mold are brought close to each other and stopped at a close distance, When the decompression is stopped, , While applying a high electrostatic voltage of charging the same kind of the film to the electrode plate, and a method of film is fixed to the mold surface.

  However, when trying to supply a thin label (thickness of about 30 μm) to the mold by the method as described above, particularly when the label is charged and transferred to the mold as described in Patent Document 2, In some cases, the label sticks to the core and cannot be transferred to the mold, and the label cannot be stably supplied to the mold cavity.

  In addition, due to variations in the dimensional accuracy and mounting accuracy of the core and the like, the proximity between the core and the mold may deteriorate, and the label may not be stably supplied to the mold cavity. In particular, as described in Patent Documents 3 and 4, in order to supply a label to each cavity of a mold to be obtained in large numbers, when a plurality of cores are provided in the same movable part of the supply device, etc. It is difficult to make all the cores approach the mold in the same way, and if all the cores try to stably supply the label to the mold cavity, it takes time to adjust and the workability becomes worse. It was.

Japanese Patent Laid-Open No. 5-285981 Japanese Patent Publication No.46-5072 JP-A-2005-104111 JP 2006-188036 A

  Therefore, the present invention provides a label supply core device that can stably supply even a thin label (for example, about 30 μm thick) to a mold cavity, and can supply a thin label stably to a mold cavity. An object is to provide a label supply method.

In order to solve the above-described problems, a label supply core device according to the present invention has a contact surface for closely attaching a label used for insert molding, and supplies the label to a cavity of an insert molding die. With
The shape of the core for supplying the label is similar to the cavity in the portion (particularly the contact surface) inserted into the cavity, and a clearance is generated so that the label can be interposed between the inner peripheral wall surface of the cavity. The diameter is a truncated pyramid that decreases in diameter, and the contact surface is an outer peripheral surface of the label supply core,
The label supply core is divided into a pusher core and a main core so as to divide the contact surface into a pusher portion on the distal end side and a main portion on the proximal end side ,
After inserting the label supply core held in close contact with the label by a holding means into the cavity, the holding is released, and the pusher core is moved away from the cavity when the label supply core is released from the cavity. And a pressing / peeling mechanism for separating the label from the main part by separating the main core from the pusher core while pressing toward the inner peripheral wall surface side.

In addition, the main core can be brought close to the mold for insert molding regardless of variations in dimensional accuracy and assembly accuracy, and the label can be stably supplied to the cavity. to the mounting plate to move the label supply core, mounted for displacement of the insertion and removal direction, between the main core and the mounting plate, the resilient mechanism for adjusting the expansion and contraction of the clearance between the main core and the wall surface via It is preferable that it is mounted.

In order to solve the above-mentioned problems, the label supply method of the present invention provides a label for supplying a label used for insert molding to a cavity of a mold for insert molding by means of a label supply core having a close contact surface for closely contacting the label. A supply method,
The shape of the core for supplying the label is similar to the cavity in the portion inserted into the cavity, and a clearance that allows the label to be interposed between the inner peripheral wall surface of the cavity is reduced in diameter toward the tip. Is a truncated pyramid,
Close the label feed core holding in close contact with the label on the contact surface by the holding means in the insert molding die, and inserting step of inserting into said cavity,
A releasing step of releasing the holding of the label by the holding means after the inserting step;
When the label supply core is separated from the cavity after the releasing step, the adhesive surface is pressed against the inner peripheral wall surface of the cavity with a pusher core having a pusher portion on the distal end side that is divided from the adhesive surface. the main core having a main portion of the divided proximally away from said pusher core and having a peeling step for peeling the label from the main unit.

  In addition, the main core can be brought close to the mold for insert molding regardless of variations in dimensional accuracy and assembly accuracy, and the label can be stably supplied to the cavity. The clearance is preferably adjusted by expansion and contraction of the elastic mechanism.

The shape of the labels supply core portion is inserted into the cavity (in particular, the adhesion surface) is similar to the cavity, only the clearance of the label can be interposed between the wall surface of the cavity that occurs easily supply of labels It is preferable. As a specific shape, as described above, the shape is a truncated pyramid whose diameter decreases toward the tip .
Further , a base end portion obtained by dividing the label supply core into a base end side and a front end side is a main core, and a front end side portion is a pusher core .

  Although the area of the main part is not particularly limited, it is preferable that the area of the main part is not less than half of the contact surface because the label is easily attached to the wall surface of the cavity.

  Although it does not specifically limit as a press peeling mechanism, A hydraulic cylinder, an air cylinder, a solenoid etc. can be illustrated.

  The holding means is not particularly limited, and examples thereof include suction by suction.

  Although it does not specifically limit as an elastic mechanism, Elastic bodies, such as a coil spring, an air spring, etc. can be illustrated.

  According to the present invention, it is possible to provide a core device for supplying a label that can stably supply even a thin label (for example, about 30 μm thick) to a mold cavity. It is possible to provide a label supply method that can be supplied to the printer.

It is a perspective view of the core apparatus for label supply of Example 1. FIG. It is the side view and sectional drawing of the core apparatus for label supply. It is the top view and sectional drawing of the core apparatus for label supply. It is explanatory drawing at the time of the pusher core action | operation of the core apparatus for label supply. It is explanatory drawing when supplying a label to a cavity by the core apparatus for label supply. It is a perspective view of the attachment plate which attached four label supply core apparatuses of Example 2. FIG. It is a perspective view of the core apparatus for label supply. It is the top view and sectional drawing of the core apparatus for label supply. It is explanatory drawing of clearance adjustment of the core apparatus for label supply, and a metal mold | die. It is explanatory drawing of clearance adjustment of two core apparatuses for label supply, and a metal mold | die.

  A label supply core device 20 according to a first embodiment of the present invention will be described with reference to FIGS.

  The label supply core device 20 is a base end portion obtained by dividing a substantially truncated cone-shaped label supply core 19 whose diameter is reduced toward the front end into a base end side and a front end side. The attached main core 30, the pusher core 40, which is a distal end portion obtained by dividing the label supply core 19 into a proximal end side and a distal end side, and an inner space 50 formed inside the main core 30. The pusher core 40 and the main core 30 are separated from each other by being expanded and contracted. More specifically, the pusher core 40 and the main core 30 are separated from each other by extension, and the pusher core 40 and the main core 30 are contracted by contraction. And a pusher cylinder 45 for abutting with each other.

  The main core 30 has a substantially truncated conical shape with a reduced diameter on the tip side. And it is screwed to the mounting plate 21 by two mounting bolts 22 spaced apart from each other. The two mounting bolts 22 are interposed between the main core 30 and the mounting plate 21, and each is inserted through a spacer 23 having a substantially cylindrical shape and a flange formed on the mounting plate 21 side.

  The main surface 31 which is the outer peripheral surface of the main core 30 has two suction grooves 32 extending in the circumferential direction and continuous over one circumference, and two open grooves extending in the circumferential direction and continuous over the circumference. 33 is recessed. The two suction grooves 32 are each provided with suction pores 36 so as to communicate with one suction path 35 drilled from the base end face 34 of the main core 30. Each of the two open grooves 33 is formed with open pores 38 so as to communicate with only one of the two open passages 37 drilled from the base end face 34 of the main core 30. Since the suction path 35 is connected to a negative pressure device provided outside, by operating this negative pressure device, the pressure in the suction groove 32 can be made negative, and the label 10 is brought into close contact with the label supply core 19. It can be held in close contact with the surface. On the other hand, since the two open paths 37 are connected to a pressure device provided outside, the inside of the open groove 33 can be pressurized by operating this pressure device, and the label supply core 19 can be pressurized. The label that is in close contact with the adhesive surface can be peeled off. The main surface 31 is a main portion that divides the contact surface of the label supply core 19.

  The inner space 50 of the main core 30 has a straight shape extending from the base end side to the tip end side with substantially the same diameter, and both sides of the base end face 34 and the tip end face 39 of the main core 30 are open. The proximal end opening 51 on the 34 side is formed with a stop 52 that protrudes from the inner wall surface 55 of the inner space 50 over the entire circumference, and is reduced in diameter.

  A substantially cylindrical main guide 25 fixed to the mounting plate 21 is inserted into the base end opening 51. The main guide 25 is formed with a stepped portion 26 in the middle of the length direction, and is a diameter-increased portion 27 having a diameter larger than the stepped portion 26. The diameter-expanded portion 27 is inserted into the proximal end side of the inner space 50. Yes. A substantially annular base end guide bush 56 is interposed between the inner wall surface 55 of the inner space 50 and the enlarged diameter portion 27. The main guide 25 can slide in the inner space 50 along the proximal end guide bush 56. Further, the stop portion 52 prevents the enlarged diameter portion 27 from leaving the inner space 50.

  A distal end guide bush 57 having substantially the same shape as the proximal end guide bush 56 is inserted in the distal end side of the inner space 50. Further, between the proximal guide bush 56 and the distal guide bush 57, a substantially annular interposed ring 58 having an inner diameter substantially the same as the inner diameter of the proximal guide bush 56 and the like is interposed.

  In the pusher cylinder 45, the main body portion 46 is fitted in a hole provided in the approximate center of the distal end surface 28 of the main guide 25. The pusher cylinder 45 is an air cylinder that is extended by pressurized air supplied from the outside through the air passage 24 formed in the main guide 25 from the base end surface 29. A substantially cylindrical support member 48 is attached to the tip of the rod 47 of the pusher cylinder 45. The support member 48 slides in the inner space 50 along the tip guide bush 57 by the expansion and contraction of the pusher cylinder 45. This pusher cylinder 45 is a pressure peeling mechanism.

  The pusher core 40 has a substantially truncated conical shape with a reduced diameter on the distal end side, and is attached to the distal end surface 49 of the support member 48 by two screws 42. The gradient of the pusher surface 41 that is the outer peripheral surface of the pusher core 40 is substantially the same as the gradient of the main surface 31 of the main core 30. The pusher surface 41 is a pusher portion that divides the contact surface of the label supply core 19.

  Next, the pusher cylinder 45 extending and contracting under the control of the pressurized air supplied through the air passage 24 will be described with reference to FIG. 4 to separate and abut the pusher core 40 and the main core 30. When there is no supply of pressurized air to the pusher cylinder 45, the pusher cylinder 45 is urged in a retracting direction by a spring provided therein, and as shown in FIG. 40 and the main core 30 are in contact with each other. On the other hand, when pressurized air is supplied to the pusher cylinder 45, the pusher cylinder 45 is extended by the pressurized air, and the pusher core 40 and the main core 30 are separated as shown in FIG. .

Next, a method of supplying the label 10 to the cavity 13 of the insert molding die 12 using the label supply core device 20 will be described with reference to FIG.
First, as shown in FIG. 5 a, the label 10 rolled using a known method such as a pseudo mold (see Patent Document 4) is wound around the pusher surface 41 of the pusher core 40 and the main surface 31 of the main core 30. The label supply core device 20 that adsorbs and holds the label by suctioning the suction groove 32 by suction in the suction groove 32 is moved while the label 10 is charged, and the insert plate 21 is moved. Move closer to the mold 12. Then, as shown in FIG. 5 b, it is inserted into the cavity 13 of the insert molding die 12 so that the tip abuts against the bottom wall surface 15 of the cavity 13. In this state, the clearance between the pusher surface 41 and the main surface 31 and the peripheral wall surface 14 of the cavity 13 is substantially the same as the thickness of the label 10.
After the insertion into the cavity 13, the suction in the suction groove 32 is stopped.
Thereafter, the inside of the open groove 33 is pressurized and pressurized air is supplied to the pusher cylinder 45. Then, the pusher cylinder 45 is extended by pushing the label 10 against the peripheral wall surface 14 of the cavity 13 by the pusher cylinder 45, and the pusher core 40 and the main core 30 are separated from each other. The main core 30 is moved in a direction away from the cavity 13 by moving in a direction away from the insert molding die 12. Then, as shown in FIG. 5 c, the label 10 is peeled off from the main surface 31 and attached to the peripheral wall surface 14 of the cavity 13.
Thereafter, as shown in FIG. 5 d, the label supply core device 20 is moved in a state where the label 10 is attached to the peripheral wall surface 14 of the cavity 13 by further separating the mounting plate 21 from the insert molding die 12. Separate from the cavity 13.

  According to the label supply core device 20, the pusher core 40 is separated from the main core 30 while the label 10 is pressed against the peripheral wall surface 14 of the cavity 13 by the pusher core 40, and the main core 30 is separated from the cavity 13. Since the label 10 is peeled off from the main surface 31 of the main core 30, even a thin label having a thickness of about 30 μm can be reliably attached to the peripheral wall surface 14 of the cavity 13, and the label 10 can be stably It could be supplied to the cavity 13 of the insert molding die 12.

  A label supply core device 60 according to a second embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 6, four label supply core devices 60 are attached to one attachment plate 61, so that the multi-piece insert molding die 11 (in this case, four pieces) can be used. This is used when supplying labels 10 to all (four) cavities 13 at a time. The label supply core device 60 can be used not only when a plurality of label supply core devices 60 are attached to one attachment plate but also when only one is attached to one attachment plate.

  The label supply core device 60 uses a spring guide 65 and a bush 67 instead of the spacer 23 for mounting to the mounting plate 61 so that the main core 30 is mounted so as to be displaceable in a direction orthogonal to the mounting plate 61. Unlike the label supply core device 20 of the first embodiment, the point that the coil spring 62 is interposed as an elastic mechanism between the main core 30 and the mounting plate 61 is different. This is the same as the label supply core device 20. 6 to 10, the same members as those in the label supply core device 20 are denoted by the same reference numerals.

  Specifically, two substantially cylindrical spring guides 65 are separated from each other on the base end surface 34 of the main core 30 and screwed with bolts 66, and each of the mounting plates 61 corresponding to the two spring guides 65 is provided. The main core 30 is attached to the attachment plate 61 so as to be displaceable in a direction orthogonal to the attachment plate 61 by penetrating an annular bush 67 through which the spring guide 65 is inserted. In addition, a coil spring 62 is fitted around each of the two spring guides 65, and the main core 30 is urged by the coil spring 62 in a direction away from the mounting plate 61.

  Since the main core 30 is attached to the attachment plate 61 in this way, the label supply core device 60 is in contact with the bottom wall surface 15 of the cavity 13 as shown in FIG. When the mounting plate 61 is moved in the direction approaching the insert molding die 11 (the direction of the arrow in FIG. 9A), the mounting plate 61 moves along the spring guide 65 as shown in FIG. 9B. Then, the coil spring 62 contracts, the main guide 25 moves in the distal direction with respect to the main core 30, and the pusher cylinder 45 contracts. Therefore, the attachment plate 61 can be brought close to the label supply core device 60 and the insert molding die 11 without changing the positions of the main core 30 and the pusher core 40.

  Next, a case where a plurality (two in this case) of label supply core devices 60 have different distances from the mounting plate 61 to the tip due to variations in component accuracy will be described with reference to FIG.

  As shown in FIG. 10a, since the two label supply core devices 60 have different tip positions due to variations in component accuracy, the label supply core having the longer distance from the mounting plate 61 to the tip is provided. The device 63 is in contact with the bottom wall surface 15 of the cavity 13 of the insert molding die 11 (the pusher surface 41 of the pusher core 40 of the core device 63 for label supply and the main surface 31 of the main core 30 and the peripheral wall surface of the cavity 13). 14 is substantially the same as the thickness of the label 10), the label supply core device 64 having a shorter distance from the mounting plate 61 to the tip contacts the bottom wall surface 15 of the cavity 13. The clearance between the cavity 13 and the peripheral wall surface 14 is also larger than the thickness of the label 10. Therefore, as shown in FIG. 10 b, the label supply core device 63 prevents the label supply core 19 from moving by contracting the coil spring 62 and the pusher cylinder 45. The mounting plate 61 is moved until 64 comes into contact with the bottom wall surface 15 of the cavity 13, and the clearance between the pusher surface 41 and the main surface 31 of the label supply core device 64 and the peripheral wall surface 14 of the cavity 13 is set to the thickness of the label 10. It can be made small so that it is almost the same.

  According to the label supply core device 60, in addition to the effects obtained by the label supply core device 20 of Example 1, the clearance between the label supply core device 60 and the cavity 13 due to variations in component accuracy and the like could be adjusted. Therefore, in particular, the label 10 can be stably supplied to the cavities 13 of the insert molding die 11 to be obtained in large numbers. In addition, since the accuracy and the like when attaching the label supply core device 60 to the mounting plate 61 can be made rough, the setting time of the device for supplying the label 10 to the insert molding die 11 using the label supply core device 60 is also increased. I was able to shorten it.

  In addition, this invention is not limited to the said Example, In the range which does not deviate from the meaning of invention, it can change suitably and can be actualized.

10 Label 11 Mold for insert molding (Many pieces)
DESCRIPTION OF SYMBOLS 12 Insert mold 13 Cavity 14 Perimeter wall surface 19 Label supply core 20 Label supply core apparatus (Example 1)
21 Mounting plate 30 Main core 31 Main surface 32 Suction groove 40 Pusher core 41 Pusher surface 45 Pusher cylinder 60 Core device for label supply (Example 2)
61 Mounting plate 62 Coil spring 65 Spring guide 67 Bush

Claims (4)

For supplying a label having an adhesion surface (31, 41) for closely attaching a label (10) used for insert molding, and supplying the label (10) to a cavity (13) of an insert molding die (11, 12) With a core (19),
The label supply core (19) has a shape similar to that of the cavity (13) in the portion inserted into the cavity (13), and the label is provided between the inner wall surface (14) of the cavity (13). (10) is a truncated pyramid with a diameter that decreases toward the tip, with a clearance sufficient to intervene, and the contact surfaces (31, 41) are outer peripheral surfaces of the label supply core (19),
The label supply core (19) is separated from the pusher core (40) and the main portion by separating the contact surfaces (31, 41) into a pusher portion (41) on the distal end side and a main portion (31) on the proximal end side. Divided into cores (30),
After inserting the label supply core (19) held in close contact with the label (10) by the holding means into the cavity (13), the holding is released, and the label supply core (19) is When separating from the cavity (13), the main core (30) is separated from the pusher core (40) while pressing the pusher core (40) toward the inner peripheral wall surface (14) of the cavity (13). A label supply core device, comprising: a pressure peeling mechanism (45) for peeling the label (10) from the main portion (31). The main core (30), said the cavity mounting plate for moving said label supply core insertion and removal direction of the (13) (19) (61), displacement of possible attached to the insertion and removal direction,
An elastic mechanism (62) for adjusting the clearance between the main core (30) and the inner peripheral wall surface (14) by expansion and contraction is interposed between the main core (30) and the mounting plate (61). The core device for label supply according to claim 1 . The label (10) used for the insert molding is inserted into the cavity of the insert molding die (11, 12) by the label supply core (19) having the contact surfaces (31, 41) for closely contacting the label (10). 13) A label supplying method for supplying to
The label supply core (19) has a shape similar to that of the cavity (13) in the portion inserted into the cavity (13), and the label is provided between the inner wall surface (14) of the cavity (13). (10) is a truncated pyramid with a diameter that decreases toward the tip, with a clearance sufficient to intervene, and the contact surfaces (31, 41) are outer peripheral surfaces of the label supply core (19),
Close the label (10) the contact surface said label supply core holding in close contact with the (31, 41) (19) by the holding means to the insert molding die (11, 12), the cavity An insertion step of inserting into (13);
A releasing step of releasing the holding of the label (10) by the holding means after the inserting step;
A pusher core (40) having a pusher portion (41) on the distal end side obtained by dividing the contact surface (31, 41) when the label supply core (19) is detached from the cavity (13) after the releasing step. A main core (30) having a main portion (31) on the base end side obtained by dividing the contact surface (31, 41) while pressing the label (10) against the inner peripheral wall surface (14) of the cavity (13). A label supplying method comprising: a separation step of separating the label (10) from the main portion (31) away from the pusher core (40). The label supply method according to claim 3 , wherein a clearance between the main core (30) and the inner peripheral wall surface (14) during the insertion step is adjusted by expansion and contraction of an elastic mechanism (62).

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