JP2010042605A - Transfer sheet feeding device and manufacturing method of resin molded product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transfer sheet feeding device which easily determines that a transparent transfer layer is transferred to a resin body and formed on the surface of a resin molded product, and to provide a manufacturing method of the resin molded product. <P>SOLUTION: A marking pen 60 is installed in the center of a horizontal member 73 through a marking pen holding member 65, and the marking pen 60 marks a transfer confirming mark 64 on the transfer layer 54 of a transfer sheet 55 before it is fed into an injection molding die 11. In the concrete, the marking pen 60 marks the transfer confirming mark 64 which is linear continuously along the feeding direction of the transfer sheet 55 so as to pass through a portion not superimposed on a portion transferred on the resin body 56 of the transfer layer 54 in a view from the feeding direction of the transfer sheet 55 of the portion of the transfer layer 54 to be transferred to a resin gate 58. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a transfer sheet feeding apparatus, and more particularly to a transfer sheet feeding apparatus for feeding a transfer sheet having a transfer layer transferred simultaneously with injection molding into an injection mold and a method for manufacturing a resin molded product.

  There is a resin molded product in which a transfer layer such as a pattern is transferred to the surface, such as a casing of a mobile phone. This resin molded product is manufactured, for example, by using a transfer sheet feeding device to feed a transfer sheet on which a transfer layer has been formed into an injection mold and transferring the transfer layer onto the resin body at the same time as injection molding. (See, for example, Patent Document 1). The injection mold includes a fixed mold, a movable mold that forms a cavity between the fixed mold and mold clamping, and a clamp that brings the transferred transfer sheet into and out of contact with the movable mold parting surface. ing. The transfer sheet feeding device is a device that feeds a roll-shaped long transfer sheet vertically into the injection mold along the movable parting surface, and is attached to the upper part of the movable plate of the injection molding machine. The unwinding part is formed, and a winding part attached to the lower part of the movable platen.

In the production of the resin molded product, first, in a state where the mold is opened, the transfer sheet fed from the unwinding portion is aligned and brought into contact with the movable parting surface by a clamp. Next, the transfer sheet is arranged along the movable cavity surface by suction. Next, the mold is clamped and the molten resin is injected into the cavity to form the resin main body, and at the same time, the transfer layer is transferred to the resin main body to mold the resin molded product. After the resin molded product is cooled and solidified, the mold is opened and the transfer sheet is released from the movable parting surface by clamping, and the resin molded product is taken out from the injection mold. In this manner, a resin molded product having a pattern transferred to the surface is manufactured. When the resin molded product taken out from the mold is inspected for appearance such as scratches, whether or not the transfer layer has been transferred to the resin main body part is visually determined by the design of the transfer layer being formed on the surface of the resin molded product Judgment is made based on whether or not
JP 2005-343027 A

  In the conventional transfer sheet feeding apparatus and the method for producing a resin molded product as described above, when the transfer layer is composed of a functional layer for surface protection or the like and is transparent, the transfer layer is transferred to the resin main body and resin molded. It is not so easy to determine whether or not the product is formed on the surface of the product as it can be determined at a glance as in the case of the above-described design.

  The present invention has been made to solve the above-described problems, and it is easy to determine that the transparent transfer layer is transferred to the resin body and formed on the surface of the resin molded product. An object of the present invention is to provide a transfer sheet feeding device and a method for producing a resin molded product.

  In order to achieve the above object, according to a first aspect of the present invention, a resin body portion and a resin gate portion connected to the resin body portion are injection-molded, and a transparent transfer layer is formed between the resin body portion and the resin gate portion. A transfer sheet feeding device for feeding a transfer sheet having a transfer layer into an injection mold having a cavity and a gate space connected to the cavity so as to be transferred simultaneously with injection molding. Installed upstream of the molding die in the transfer sheet feeding direction, unwinds the transfer sheet and feeds it into the injection molding die, and installed downstream of the injection molding die in the transfer sheet feeding direction Installed between the take-up portion for winding the transfer sheet fed into the injection mold and the transfer sheet after being unwound and fed into the injection mold. Feed into mold Before, in which a marking member for marking a transfer check mark in the portion which is transferred to the resin gate portion of the transfer layer.

  If comprised in this way, the transfer confirmation mark will be formed in the resin gate part connected to the resin main-body part taken out from the metal mold | die for injection molding.

  According to a second aspect of the present invention, in the configuration of the first aspect, the portion transferred to the resin gate portion of the transfer layer does not overlap with the portion transferred to the resin main body portion of the transfer layer when viewed from the transfer sheet feeding direction. The marking member is a marking pen, and the marking pen is arranged so that the tip portion is in contact with the transfer sheet, and is continuous linearly along the feeding direction of the transfer sheet so as to pass through the non-overlapping portion. The transfer confirmation mark is marked.

  With this configuration, the linear transfer confirmation mark is transferred to the resin gate portion.

  According to a third invention, in the configuration of the second invention, the marking pen is installed so as to be movable in the width direction of the transfer sheet.

  If comprised in this way, a marking pen will move to the width direction of a transfer sheet.

  According to a fourth invention, in the configuration of the second or third invention, the unwinding portion includes a guide roller for guiding the transfer sheet to be fed to a predetermined position with respect to the injection mold, and the marking pen Is arranged so that the front end portion thereof is in contact with the transfer sheet at a position where the transfer sheet and the guide roller are in contact with each other.

  If comprised in this way, even if it makes a marking pen contact, a transfer sheet will not bend.

  According to a fifth aspect of the invention, the resin main body portion and the resin gate portion connected to the resin main body portion are injection molded, and the transparent transfer layer is transferred to the resin main body portion and the resin gate portion simultaneously with the injection molding. A method for producing a resin molded product produced by feeding a transfer sheet having a transfer layer into an injection mold having a cavity and a gate space connected to the cavity, wherein the mold is opened. , A step of feeding the transfer sheet into the injection mold, and a step of marking a transfer confirmation mark on the portion to be transferred to the resin gate portion of the transfer layer before being fed into the injection mold. The transferred sheet is brought into contact with the parting surface of the injection mold and placed along the cavity surface by suction, and the die is clamped to form the cavity and the gate space. And a step of injecting molten resin into the formed cavity and gate space to form a resin main body portion and a resin gate portion, and simultaneously transferring a transfer layer to the resin main body portion and the resin gate portion to mold a resin molded product. And a step of cooling and solidifying the molded resin molded product, and a step of opening and taking out the resin molded product cooled and solidified.

  With this configuration, a transfer confirmation mark is formed on the gate member connected to the resin molded product taken out from the injection mold.

  As described above, since the transfer confirmation mark is formed on the resin gate portion connected to the resin body portion taken out from the injection mold, the first invention has a transparent transfer layer on the resin body portion. Can be easily confirmed.

  In the second invention, in addition to the effects of the first invention, a linear transfer confirmation mark is transferred to the resin gate portion. Therefore, by adding a simple configuration to the transfer sheet feeding device, It can be easily confirmed that the transparent transfer layer is transferred.

  In the third invention, in addition to the effect of the second invention, the marking pen moves in the width direction of the transfer sheet, so that the position of the marking pen can be easily changed according to the position of the resin gate portion.

  In addition to the effects of the second or third invention, the fourth invention marks the transfer confirmation mark without affecting the running of the transfer sheet because the transfer sheet does not bend even if the marking pen is brought into contact therewith. be able to.

  According to a fifth aspect of the present invention, since a transfer confirmation mark is formed on the gate member connected to the resin molded product taken out from the injection mold, the transparent transfer layer is transferred to the resin main body. A resin molded product can be manufactured easily.

  Next, embodiments of the invention will be described with reference to the drawings.

  FIG. 1 is a front view (1) showing a schematic configuration of a resin molded product, and (2) is a cross-sectional view taken along the line I-I shown in (1).

  Referring to (1) of FIG. 1, a resin molded product 57 and a gate member 59 connected to the resin molded product 57 are formed simultaneously with the transfer sheet feeding device 12 according to the first embodiment of the present invention. It is manufactured by the transfer device 10. The resin molded product 57 is a part of the casing of the mobile phone. The resin molded product 57 has a rectangular shape when viewed from the front, the two resin molded products 57 are aligned at a predetermined interval, and the gate member 59 as a whole has a substantially U shape when viewed from the front. The ends of the gate members 59 are connected so as to connect the short side centers of the same side. In the center of the gate member 59, a continuous linear transfer confirmation mark 64 is formed.

  Referring to (2) of FIG. 1, the resin molded product 57 includes a thin box-shaped resin main body portion 56 whose back surface is opened, and a transfer layer 54 that covers the entire surface of the resin main body portion 56. . The gate member 58 includes a resin gate portion 58 generated by adopting a film gate and a transfer layer 54 that covers the entire surface of the resin gate portion 58. The transfer layer 54 on the resin body 56 and the transfer layer 54 on the resin gate 58 are continuous.

  Next, the simultaneous molding and transfer apparatus 10 to which the transfer sheet feeding apparatus 12 is applied will be described.

  FIG. 2 is a side view showing a schematic configuration of a simultaneous molding transfer apparatus to which the transfer sheet feeding apparatus according to the first embodiment of the present invention is applied, and FIG. 3 is an unwinding portion and a movable mold shown in FIG. FIG. 4 is an enlarged view of a portion A shown in FIG. 1.

  2 and 3, the simultaneous molding and transfer apparatus 10 includes an injection molding machine, an injection molding die 11 and a transfer sheet feeding device 12 installed in the injection molding machine. The simultaneous molding and transferring apparatus 10 uses the transfer sheet feeding apparatus 12 to feed a transfer sheet 55 having a transfer layer 54 onto a base sheet 53 into the injection mold 11 and transfer the transfer layer 54 simultaneously with the injection molding. This is an apparatus for producing a resin molded product 57.

  The injection mold 11 is provided on a fixed mold 17, a movable mold 18 that forms a cavity 24 and a gate space 29 between the fixed mold 17 and clamping, and a parting surface 20 of the movable mold 18. And a clamp 25 for bringing the transfer sheet 55 into contact with and releasing from the contact surface 20. The fixed mold 17 is fixed to the fixed platen 15 of the injection molding machine, and the movable mold 18 is fixed to the movable platen 16 of the injection molding machine. The movable mold 18 moves in the horizontal direction with respect to the fixed mold 17 by a driving means (not shown) of the injection molding machine, and mold clamping and mold opening are performed. The injection mold 11 is injection-molded with a resin body 56 and a resin gate 58 connected to the resin body 56 with the fixed mold 17 and the movable mold 18 being clamped, and a transfer layer. The cavity 24 and the gate space 29 connected to the cavity 24 are configured so that 54 is transferred to the resin main body portion 56 and the resin gate portion 58 simultaneously with the injection molding.

  The movable mold 18 has a cavity surface 23 corresponding to the front surface of the resin molded product 57 and a gate space surface 28 corresponding to the front surface of the gate member 59 at the center of the parting surface 20. A clamp 25 is disposed so as to surround the cavity surface 23 and the gate space surface 28 with a rectangular shape. The clamp 25 includes two cross members arranged so as to straddle the transfer sheet 55, and the vertical members connected so as to bridge the two cross members along the end portion of the transfer sheet while covering the end portions. It is composed of materials. The clamp moves in the mold clamping direction, and the transfer sheet 55 is conveyed between the clamp 25 and the parting surface 20.

  The fixed die 17 has a cavity surface 22 corresponding to the back surface of the resin molded product 57 and a gate space surface 27 corresponding to the back surface of the gate member 59 at the center of the parting surface 19. A concave clamp housing portion 26 is formed around the cavity surface 22 and the gate portion space surface 27 so as to correspond to the outer shape of the clamp so that the clamp 25 is housed when the mold is clamped.

  The transfer sheet feeding device 12 is a device that intermittently feeds the transfer sheet 55 along the parting surface 20 of the movable mold 18 into the injection mold 11 while repeatedly running and stopping from above to below. . The transfer sheet feeding device 12 includes an unwinding unit 30 installed at the top of the movable platen 16, a winding unit 40 installed at the bottom of the movable platen 16, and a marking pen as a marking member attached to the winding unit. 60, a feed direction sensor 50 installed at the upper part of the movable mold 18, and a width direction sensor 51 installed at the upper and lower parts of the movable mold 18. The unwinding unit 30 is installed on the upstream side in the feeding direction of the transfer sheet 55 from the injection molding die 11, and the winding unit 40 is installed on the downstream side in the feeding direction of the transfer sheet 55 from the injection molding die 11. The marking pen 60 is installed from when the transfer sheet 55 is unwound to when it is fed into the injection mold 11.

  The unwinding unit 30 is a device that unwinds the transfer sheet 55 wound in a roll shape and feeds it into the injection mold 11. The unwinding unit 30 includes a bottom plate 74 and a frame 31 having a side plate 75 rising from both ends of the transfer plate 55 in the width direction of the bottom plate 74, and a reel 36, a guide roller 37, and a guide roller 38 that are attached so as to span the side plates 75. And. The reel 36 is rotationally driven while being controlled in speed by a driving means (not shown), and a long transfer sheet 55 wound in a roll shape is set on the reel 36. The transfer sheet 55 unwound from the reel 36 is guided to the guide roller 37 and the guide roller 38 so as to be fed to a predetermined position with respect to the movable mold 18 while being applied with a predetermined tension. The guide roller 37 and the guide roller 38 rotate following the movement of the transfer sheet 55. The frame 31 is installed on the upper part of the movable platen 16 via a connecting member 32 made of a bent plate having an L shape in side view and a slide guide made up of a block 34 and a rail 35. The connecting member 32 is fixed to the movable platen 16, and the rail 35 is fixed to the upper surface of the connecting member 32. A block 34 is fixed to the lower surface of the frame 31. By sliding the block 34 with respect to the rail 35, the frame 31, that is, the unwinding portion 30 can be moved in the width direction of the transfer sheet 55 (direction passing through the paper surface).

  The marking pen 60 is installed in the center of the horizontal member 73 via a marking pen holding member 65. The horizontal member 73 is attached to the upper side of the back of the guide roller 38 so that the side plates 75 of the frame 31 are bridged so as not to rotate. With this marking pen 60, a transfer confirmation mark 64 is marked on the transfer layer 54 as the transfer sheet travels. The portion transferred to the resin gate portion 58 of the transfer layer 54 has a portion that does not overlap the portion transferred to the resin main body portion 56 of the transfer layer 54 when viewed from the feeding direction of the transfer sheet 55. Specifically, it is a portion transferred to the central portion of the gate member 59 formed in a U shape. The marking pen 60 marks a transfer confirmation mark 64 on a portion of the transfer layer 54 to be transferred to the resin gate portion 58 before being sent into the injection mold 11. Specifically, the marking pen 60 marks a continuous linear transfer confirmation mark 64 along the feeding direction of the transfer sheet 55 so as to pass through the non-overlapping portion. The mounting structure of the marking pen 60 will be described later.

  The winding unit 40 is a device that winds up the transfer sheet 55 that has been unwound from the unwinding unit 30 and fed into the injection mold 11. The winding unit 40 includes a frame 41 having side walls on both sides in the width direction of the transfer sheet 55, and a guide roller 47, a guide roller 48, a guide roller 49, and a winding roller that are attached so as to span the side plates of the frame 41. 46. The winding roller 46 is rotationally driven while being torque controlled by a driving means (not shown), and the transfer sheet 55 sent from the unwinding portion 30 through the inside of the injection molding die 11 is wound around the winding roller 46. Taken. The transfer sheet 55 is guided to the take-up roller 46 by a guide roller 47, a guide roller 48, and a guide roller 49 while being given a predetermined tension. The guide roller 47, the guide roller 48, and the guide roller 49 are rotated following the movement of the transfer sheet 55. Similar to the frame 31, the frame 41 is installed at the lower part of the movable platen 16 via a connecting member 42 made of a bent plate having an L shape in side view and a slide guide made of a block 44 and a rail 45. . The frame 41, that is, the winding unit 40 is movable in the width direction of the transfer sheet 55. Further, the positions of the guide roller 47 and the guide roller 38 of the unwinding unit 30 determine the distance between the parting surface 20 of the movable mold 18 and the transfer sheet 55.

  The feed direction sensor 50 is a sensor that detects dot-like feed direction marks formed on the transfer sheet 55 at regular intervals according to the transfer layer 54 in a predetermined range to be transferred. When the feed direction sensor 50 detects this feed direction mark, the transfer sheet 55 that is running is aligned with the transfer layer 54 in a predetermined range formed on the transfer sheet 55 and the cavity surface 23 of the movable mold 18. Stop at a predetermined position. Specifically, when the feed direction sensor 50 detects the front end of the feed direction mark, the traveling speed of the transfer sheet 55 is reduced, and when the rear end of the feed direction mark is detected, the transfer sheet 55 is stopped.

  The width direction sensor 51 is a sensor that detects a continuous linear width direction mark formed on the side of the transfer sheet 55 in the longitudinal direction of the transfer sheet 55. A width direction mark is detected by two sensors, a width direction sensor 51 installed at the upper part of the movable mold 18 and a width direction sensor 51 installed at the lower part of the movable mold, and the inclination of the transfer sheet 55 with respect to the feeding direction is adjusted. The Specifically, with the transfer sheet 55 stopped in the feed direction by the feed direction sensor 50, the transfer sheet 55 is moved in the width direction, and the two upper and lower width direction sensors 51 are positioned at one of the width direction marks. When the side edge is detected, the moving speed of the transfer sheet 55 is reduced. When the upper and lower width direction sensors 51 detect the other end of the width direction mark, the movement of the transfer sheet 55 in the width direction is stopped. Since the movement distance of the transfer sheet 55 in the width direction is short, the movement of the transfer sheet 55 may be stopped when the upper and lower width direction sensors 51 first detect one end of the width direction mark.

  The transfer sheet 55 is unwound from the reel 36 of the unwinding section 30, guided by the guide roller 37 and the guide roller 38, and then positioned at a predetermined position by the feed direction sensor 50 and the width direction sensor 51 described above. The stopping and running are repeated along the parting surface 20 of the movable mold 18. Then, it is guided by the guide roller 47, the guide roller 48, and the guide roller 49 and is taken up by the take-up roller 46 of the take-up unit 40. Movement of the transfer sheet 55 in the width direction is performed by movement of the unwinding unit 30 and the winding unit 40.

  The transfer sheet 55 is obtained by forming a transfer layer 54 to be transferred to the resin main body 56 and the resin gate 58 at the same time as injection molding on the base sheet 53. The transfer layer 54 is formed on the entire surface of the base sheet 53. The transfer layer 54 is a transparent layer that constitutes the outer surface of the resin molded product 57. For example, a release layer that protects the outer surface from scratches, an adhesive that improves the adhesion between the resin body 56 and the transfer layer 54. Layer. Further, in order to improve the peelability of the transfer layer 54 from the base sheet 53, a release layer is formed between the base sheet 53 and the transfer layer 54. The release layer is a layer that remains on the base sheet 53 even after the transfer layer 54 is transferred.

  The base sheet 53 is made of a material such as a resin sheet such as polyethylene terephthalate (PET), polypropylene (PP), or acrylic, a metal foil, glassine paper, coated paper, a cellulosic sheet such as cellophane.

  For the release layer, an acrylic (PMMA) resin, a polyester resin, a copolymer such as a vinyl chloride-vinyl acetate copolymer resin, or the like is used. In order to increase the hardness of the release layer and improve the scratch resistance of the resin molded product 57, an ultraviolet curable resin, an electron beam curable resin, or the like is used. The release layer is printed on the substrate sheet by a gravure printing method, a screen printing method, an offset printing method, or the like.

  The resin body 56 is made of a material that matches the purpose of the molded product. For example, acrylonitrile butadiene styrene (ABS), PMMA, polystyrene (PS), styrene acrylonitrile (AS), polycarbonate (PC), polyvinyl chloride (PVC), PP, PET resin and the like.

  For the release layer, a melamine-based resin or the like is used, and for the adhesive layer, a heat-sensitive or pressure-sensitive resin suitable for the material of the resin main body 56, for example, PMMA if the resin main body 56 is PMMA resin. Resin is used. The release layer and the adhesive layer are printed by a gravure printing method, a screen printing method, or the like.

  Next, the attachment structure of the marking pen 60 will be described.

  FIG. 4 is an enlarged view of a portion A shown in FIG.

  Referring to FIG. 4, the marking pen 60 is a marking member made of, for example, oil-based ink that can mark the transfer layer 53, and a barrel portion 61 having a truncated cone-shaped solid cylindrical shape, and a barrel portion The front end portion 62 is connected to the front end side of 61 and attaches oil-based ink to the marking target. The marking pen 60 is arranged so that the tip end portion 62 contacts the transfer sheet 55 at a position where the transfer sheet 55 and the guide roller 38 contact each other. Therefore, even if the marking pen 60 is brought into contact with the transfer sheet 55, the transfer sheet 55 does not bend, so that the transfer confirmation mark 64 can be marked without affecting the running of the transfer sheet 55.

  The marking pen 60 is held by a marking pen holding member 65 at a position from behind the trunk portion 61. In other words, if it is held rotatably about the axis of the horizontal member 73, the tip end portion 62 is held by the marking pen holding member 65 at a position where it is rotated downward. If the marking pen 60 is held in this way, the weight of the marking pen acts in the direction in which the tip end portion 62 contacts the transfer sheet 55, so that the transfer confirmation mark 64 can be marked stably. Furthermore, if an urging force by a spring is applied in the rotation direction, the transfer confirmation mark 64 can be marked more stably.

  The marking pen holding member 65 has a pinching portion 66 for pinching the horizontal member 73, a pinching portion 67 for pinching the barrel portion 61 of the marking pen 60, and an axis of a target for pinching the pinching portion 66 and the pinching portion 67. And a connecting portion 68 connected so as to be orthogonal to each other. The clamping part 66 surrounds the periphery of the horizontal member 73 and extends so that two flat plate-shaped flanges face each other before entering the entire periphery. A fixing screw 69 is inserted into the two flanges, and the fixing screw 69 is screwed into the fixing nut 70 to tighten the two flanges, thereby holding the horizontal member 73 with a predetermined holding force. By rotating the fixing screw 69 or the fixing nut 70, the facing distance between the two flanges changes, and the clamping force to the horizontal member is adjusted. The clamping part 67 is also configured similarly to the clamping part 66. The connecting portion 68 has a flat plate shape.

  The clamping unit 66 can rotate the marking pen 60 around the axis of the horizontal member 73 if the clamping force is released. If the clamping force is applied again, the clamping unit 66 can be a linear line continuous to the transfer layer 54. The marking pen 60 can be fixed at a position where the tip 62 contacts the transfer sheet 55 with a predetermined pressure at which the transfer confirmation mark 64 is marked. Moreover, the clamping part 66 can be moved along the horizontal member 73 if the clamping force is released, and is fixed at a predetermined position if the clamping force is applied again. Since the horizontal member 73 is installed such that its axial direction matches the width direction of the transfer sheet 55, the marking pen 60 is installed to be movable in the width direction of the transfer sheet 55. Accordingly, the marking pen 60 is aligned with the resin gate 58, that is, when viewed from the transfer sheet 55 feeding direction, the portion of the transfer layer 54 transferred to the resin gate 58 is transferred to the resin body 56. It can be easily changed according to the part that does not overlap with the part to be applied.

  Next, the manufacturing method of the resin molded product 57 using the simultaneous molding transfer apparatus 10 to which the transfer sheet feeding apparatus 12 is applied will be described.

  2 and 3, first, the transfer sheet 55 is fed into the injection mold 11 by the transfer sheet feeding device 12 in a state where the mold is opened. At this time, the transfer confirmation mark 64 is marked on the portion of the transfer layer 54 to be transferred to the resin gate portion 58 by the marking pen 60 before being sent into the injection mold 11. The transfer sheet is arranged so that the cavity surface 23 and the transfer layer 54 in a predetermined range coincide. The transfer sheet 55 is first fed at a high speed, and then at a low speed so that the transfer layer 54 in a predetermined range matches. Next, the transfer sheet 55 is brought into contact with the parting surface 20 by moving the clamp 25 toward the parting surface 20 of the movable mold 18. Then, the transfer sheet 55 is arranged along the cavity surface 23 and the gate space surface 28 by suction.

  Next, the fixed mold 17 and the movable mold 18 are clamped to form the cavity 24 and the gate space 29. Next, molten resin is injected into the cavity 24 through the gate portion space 29 to form the resin main body portion 56 and the resin gate portion 58, and at the same time, the transfer layer 54 of the transfer sheet 55 is formed on the resin main body portion 56 and the resin gate portion 58. Is transferred to form the resin molded product 57 and the gate member 59. Next, the molded resin molded product 57 is cooled and solidified.

  Next, the mold is opened and the transfer layer is peeled off from the transfer sheet 55. Next, the clamp 25 is moved away from the parting surface 20 of the movable mold 18 to release the contact of the transfer sheet 55 from the parting surface 20. Next, the resin molded product 57 and the gate member 59 shown in FIG. 1 are taken out from the injection mold 11 by a robot or the like (not shown). Next, the gate member 59 is separated from the resin molded product 57 using a gate cutting machine, a hot nipper, or the like. In this way, the transfer sheet 55 having the transparent transfer layer 54 on the base sheet 53 is fed into the mold, and the resin molded product 57 to which the transparent transfer layer 54 is transferred simultaneously with the injection molding is manufactured.

  From the above, in the manufacturing method of the resin molded product 57 using the molding simultaneous transfer apparatus 10 to which the transfer sheet feeding apparatus 12 configured as described above is applied, the resin main body portion taken out from the injection mold 11 is used. Since the transfer confirmation mark 64 is formed on the resin gate portion 58 connected to 56, it can be easily confirmed that the transparent transfer layer is transferred to the resin main body portion 56. And it can confirm easily that the transparent transfer layer is transcribe | transferred to the resin main-body part, and can manufacture a resin molded product. Further, since the linear transfer confirmation mark 55 is transferred to the resin gate portion 58, the transparent transfer layer 54 is formed on the resin main body portion 56 only by adding a simple configuration such as the marking pen 60 to the transfer sheet feeding device 12. It can be easily confirmed that the image is transferred.

  In the above embodiment, the marking pen is fixed to the horizontal member via the marking pen holding member. However, if the transfer confirmation mark can be fixed to the transfer layer, The frame member may be fixed in a flat plate shape by other methods such as fixing to the horizontal member with an adhesive tape.

  Further, in the above embodiment, the marking pen is attached so as to be rotatable and movable in the width direction of the transfer sheet. Of the portions where the marking pen is transferred to the resin gate portion of the transfer layer, transfer is performed. If the transfer confirmation mark is fixed at the position where the transfer confirmation mark is marked on the part that does not overlap the part that is transferred to the resin main body when viewed from the sheet feeding direction, the marking pen may not be rotatable, and the width direction of the transfer sheet It does not have to be movable.

  Furthermore, in the above embodiment, oil-based ink is used for the marking pen, but other inks may be used as long as the transfer confirmation mark can be marked on the transfer layer.

  Furthermore, in the above embodiment, the tip of the marking pen is in contact with the transfer sheet at a position where the guide roller and the transfer sheet are in contact with each other. As long as the guide roller and the transfer sheet are installed before the sheet is fed, the guide roller and the transfer sheet may contact the transfer sheet at other positions.

  Furthermore, in the above embodiment, a marking pen is used as a marking member for marking the transfer confirmation mark, but the transfer confirmation mark that can be visually observed is marked on the portion of the transfer layer that is transferred to the resin gate portion. In other words, there is no need for marking in a continuous line, and other marking members such as a stamp that intermittently stamps in accordance with the running of the transfer sheet may be used.

  Furthermore, in the above embodiment, the transfer sheet feeding device is installed on the movable mold side. However, the injection mold includes a resin main body portion and a resin gate portion connected to the resin main body portion. If the cavity and the gate space connected to the cavity are configured so that the transparent transfer layer is transferred to the resin body and the resin gate at the same time as the injection molding, the transfer sheet is fed. The device may be installed on the fixed mold side. Further, if the cavity and the gate space connected to the cavity are configured as described above, the movable mold and the fixed mold may be interchanged, and the cavity and the gate space connected to the cavity It may be configured in a shape.

  Further, in the above-described embodiment, the transfer layer is formed on the entire surface of the base sheet. However, if the transfer layer is formed on portions corresponding to the resin main body portion and the resin gate portion, it is not necessary to be formed on the entire surface. .

(1) is a front view showing a schematic configuration of a resin molded product, and (2) is a cross-sectional view taken along the line I-I shown in (1). 1 is a side view showing a schematic configuration of a simultaneous molding and transfer apparatus to which a transfer sheet feeding apparatus according to a first embodiment of the present invention is applied. It is the front view which showed schematic structure of the unwinding part and movable type which were shown in FIG. It is an enlarged view of A part shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Injection mold 12 Transfer sheet feeding apparatus 24 Cavity 29 Gate space 30 Unwinding part 38 Guide roller 40 Winding part 54 Transfer layer 55 Transfer sheet 56 Resin body part 57 Resin molded product 58 Resin gate part 60 Marking pen 62 Tip Part 64 Transfer confirmation mark

Claims (5)

And a cavity so that a resin body portion and a resin gate portion connected to the resin body portion are injection-molded, and a transparent transfer layer is transferred to the resin body portion and the resin gate portion simultaneously with the injection molding. A transfer sheet feeding device for feeding a transfer sheet having the transfer layer into an injection mold having a gate space connected to the cavity,
An unwinding unit that is installed upstream of the injection mold in the feeding direction of the transfer sheet, unwinds the transfer sheet and feeds it into the injection mold;
A winding unit that is installed on the downstream side in the feeding direction of the transfer sheet from the injection mold, and winds up the transfer sheet fed into the injection mold;
It is installed between the time when the transfer sheet is unwound and sent into the injection mold, and before being transferred into the injection mold, it is transferred to the resin gate portion of the transfer layer. A transfer sheet feeding device comprising a marking member for marking a transfer confirmation mark on a portion to be transferred. The portion transferred to the resin gate portion of the transfer layer has a portion that does not overlap with the portion transferred to the resin body portion of the transfer layer, as viewed from the feeding direction of the transfer sheet,
The marking member is a marking pen, and the marking pen is arranged so that a tip portion thereof is in contact with the transfer sheet, and is linearly transferred along the transfer direction of the transfer sheet so as to pass through the non-overlapping portion. The transfer sheet feeding apparatus according to claim 1, wherein a confirmation mark is marked.   The transfer sheet feeding apparatus according to claim 2, wherein the marking pen is installed so as to be movable in a width direction of the transfer sheet. The unwinding portion includes a guide roller that guides the transfer sheet so that the transfer sheet is fed to a predetermined position with respect to the injection mold.
4. The transfer sheet according to claim 2, wherein the marking pen is disposed so that a tip portion thereof is in contact with the transfer sheet at a position where the transfer sheet and the guide roller are in contact with each other. 5. Feeder. And a cavity so that a resin body portion and a resin gate portion connected to the resin body portion are injection-molded, and a transparent transfer layer is transferred to the resin body portion and the resin gate portion simultaneously with the injection molding. A method for producing a resin molded product produced by feeding a transfer sheet having the transfer layer into an injection mold having a gate space connected to the cavity,
With the mold open, the step of feeding the transfer sheet into the injection mold,
Marking the transfer confirmation mark on the portion of the transfer layer to be transferred to the resin gate portion before being sent into the injection mold,
A step of bringing the transferred transfer sheet into contact with the parting surface of the injection mold, and arranging it along the cavity surface by suction;
Clamping the mold in the arranged state to form the cavity and the gate space;
A molten resin is injected into the formed cavity and gate space to form the resin body portion and the resin gate portion, and at the same time, the transfer layer is transferred to the resin body portion and the resin gate portion to obtain a resin molded product. Molding step;
Cooling and solidifying the molded resin molded product;
A method for producing a resin molded product, comprising the step of opening the resin molded product that has been cooled and solidified to open the mold.

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