JP5584096B2 - Manufacturing method of resin molded product for vehicle - Google Patents

Description

The present invention relates to a method for manufacturing a resin molded product for a vehicle whose outer surface is covered with a metallic decorative sheet.

  Conventionally, as a method for producing this type of resin molded product for vehicles, a metal-made sheet molded product molded from a metallic decorative sheet is inserted into an injection mold, and the vehicle resin is integrated with the metal-made sheet molded product. A method of molding a molded product is known (for example, see Patent Document 1).

Japanese Patent Laying-Open No. 2005-245331 ([0034], FIG. 5)

  By the way, in the above-described method for manufacturing a resin molded product for a vehicle, the parting line of the injection mold is transferred to the metal-like sheet molded product, and notices that the resin-molded product is a metal-like decorative effect. It was supposed to be reduced.

The present invention has been made in view of the above circumstances, and even if a gap line between structural molds of an injection mold represented by a parting line is transferred to a metal-tone sheet molded product, the transferred gap line is It is an object of the present invention to provide a method for manufacturing a resin molded product for a vehicle that can make the appearance inconspicuous.

  In order to achieve the above object, a method for producing a resin molded article for a vehicle (10) according to the invention of claim 1 comprises a metal-like sheet molded article (20) molded from a metal-like decorative sheet (30). A resin molded product (10) for a vehicle, which is set in a state of being overlapped with the cavity inner surface of an injection mold (64), filled with molten resin in the cavity, and whose outer surface is covered with a metal-like sheet molded product (20). A method for producing a molded resin product for a vehicle (10) to be molded, wherein a concavo-convex pattern region (R3) for transferring a concavo-convex pattern (82) typified by embossing to a metal-tone sheet molded product (20) is injection molded. It is formed on the inner surface of the cavity of the mold (64), and the boundary of the concave / convex pattern region (R3) is formed between the constituent molds (66, 80) of the injection mold (64) represented by the parting line in the cavity. To the gap line (K1) Having the features in place to keep to Itasa.

[Invention of Claim 1]
In the method for manufacturing a resin molded product for a vehicle (10) according to the first aspect of the present invention, the concave / convex pattern region (82) is formed on the cavity inner surface of the injection mold (64), and the concave / convex pattern region (82). Since the boundary line is matched with the gap line (K1) between the structural molds (66, 80) of the injection mold (64), the gap line (K1) is transferred to the metallic-tone sheet molded product (20). Even so, the transferred gap line can be seen as if it is a boundary line between the region where the uneven pattern (82) is transferred and the region where the uneven pattern (82) is not transferred. Thereby, the transferred gap line can be made inconspicuous.

The perspective view of the door handle for vehicles concerning a 1st embodiment. Side view of vehicle door handle Side sectional view of a vehicle door handle The perspective view which looked at the handle body from the back side Rear view of the handle body AA cross section of the handle body (A) Enlarged cross-sectional view taken along the line AA of the handle body, (B) Enlarged side view of the handle body. Perspective view of metal-like sheet molding Side sectional view of metallic decorative sheet Sectional view of metal-tone sheet molding and injection mold Cross section of injection mold with male and female molds closed Sectional view of metal-like sheet molded product inserted in injection mold Cross section of injection mold Sectional drawing of the injection mold which concerns on a modification Sectional drawing of the injection mold which concerns on a modification Sectional drawing of the injection mold which concerns on a modification

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The door handle 10 shown in FIG. 1 has an arch structure extending in the horizontal direction, and has a structure in which a pair of fixed legs 12A and 12B protrude from the both ends in the horizontal direction toward the vehicle door 40. Then, the pair of fixed legs 12A and 12B are fixed in a state of being inserted into through holes formed in the door panel 40P of the vehicle door 40 (see FIG. 2). Further, the middle portion in the longitudinal direction of the door handle 10 is a grip portion 10G which is separated from the vehicle door 40 and can be gripped by a person.

  As shown in FIG. 3, the door handle 10 includes a handle body 11 and a back cover 14. The handle body 11 is provided with an accommodation recess 17 (see FIG. 4) that is open on the vehicle door 40 side, and the opening of the accommodation recess 17 is closed by the back cover 14. A capacitance sensor 15 is built in an internal space formed between the handle body 11 and the back cover 14. Further, the door handle 10 appears to be composed entirely of the handle main body 11 in appearance (see FIG. 2).

  The capacitance sensor 15 includes, for example, a strip-shaped detection electrode 15D extending along the longitudinal direction of the door handle 10 and a capacitance detection circuit capable of detecting a change in the capacitance of the capacitance sensor 15. 15C and packaged with resin. When a human finger comes into contact with the surface of the door handle 10 facing the vehicle door 40, the capacitance of the detection electrode 15D changes beyond a predetermined reference value. The change is detected by the capacitance detection circuit 15 </ b> C, and human contact with the door handle 10 is detected. Then, for example, the signal processing device 16 provided in the vehicle main body wirelessly checks whether or not a predetermined RFID is present, and if the RFID is present nearby, the vehicle door 40 is unlocked, and a latch mechanism (not shown) The locking of the vehicle door 40 due to is also released.

  As shown in FIG. 4, the accommodating recess 17 of the handle body 11 has a structure in which the recesses 17A and 17B arranged at the front end portion and the rear end portion of the handle body 11 are connected by an accommodating groove 17M. As shown in FIG. 5, the front concave portion 17 </ b> A has a substantially oval cross-sectional shape, and the front end portion of the opening edge and the base end portion of the fixed leg 12 </ b> A described above are integrated. Further, the rear concave portion 17B has a rectangular shape whose cross-sectional shape is elongated in the width direction of the handle body 11, and receives the base end portion of the fixed leg 12B. And the opening edge part of recessed part 17A, 17B among the handle | steering-wheel main bodies 11 is the door attachment surface 18A, 18B contact | abutted with the vehicle door 40. FIG.

  The housing groove 17M is formed along the center portion in the width direction on the back surface of the grip portion 10G of the door handle 10. The accommodating groove 17M is narrower than the recesses 17A and 17B, and the groove side wall 17S of the accommodating groove 17M communicates with the opening edges of the recesses 17A and 17B.

  FIG. 6 shows a cross-sectional view of the handle main body 11 cut at an intermediate position in the longitudinal direction. As shown in the figure, the groove side wall 17S has a curved surface whose outer surface bulges outward, and a side protruding end 17T that protrudes most laterally is provided at an intermediate position in the depth direction of the groove. Have. The side projecting ends 17T are formed along the arch shape of the door handle 10 (see FIG. 2), and are curved outward at both longitudinal ends of the groove side wall 17S (see FIG. 5). Further, a transfer gap line K2 transferred from an injection mold 64, which will be described later, is formed on the side projecting end 17T (see FIG. 7B), which is more than the transfer gap line K2 on the outer surface of the handle body 11. The region located on the door 40 side is a concavo-convex pattern transfer region R2 to which the embossing 82 (see FIG. 13) is transferred from the injection mold 64 (see FIG. 7A).

  Further, the handle body 11 has a part of the outer surface covered with a metallic sheet molded product 20. The metallic-tone sheet molded product 20 is a molded product of the metallic-tone decorative sheet 30 (see FIG. 9), and has an overall shape excluding the door mounting surfaces 18A and 18B among the outer surfaces of the handle body 11. That is, the metallic sheet molded product 20 has an overall shape excluding a region (hereinafter, referred to as a back belt region R1) that closes the opening of the accommodation groove 17M on the exposed surface of the door handle 10 (see FIG. 8). ).

  The metal decorative sheet 30 before being formed into the metal-like sheet molded product 20 has a thickness of, for example, 335 μm, and as shown in FIG. 9, a thermoplastic resin layer 31 and an adhesive layer 32. The metal layer 33, the adhesive layer 35, and the weather resistant resin layer 36 are laminated in order.

  Specifically, the thermoplastic resin layer 31 is made of, for example, a film made of ABS resin (acrylonitrile-butadiene-styrene resin) and has a thickness of, for example, 250 μm. The adhesive layers 32 and 35 are both made of an acrylic resin and have a thickness of 5 μm, for example. The metal layer 33 is formed by evaporating indium on the adhesive layer 32 or the adhesive layer 35 using a physical vapor deposition method such as a sputtering method. The weather resistant resin layer 36 is made of an acrylic resin film having a thickness of 75 μm.

  In order to form the metal tone sheet molded product 20 from the metal tone decorating sheet 30, first, the metal tone decorating sheet 30 is heated and softened. Next, the softened metallic decorative sheet 30 is pressed against a mold that matches the shape of the handle main body 11, and a part of the metallic decorative sheet 30 is formed into the molded metallic sheet 20. And the metallic tone sheet molding 20 is obtained by cutting an unnecessary part out of the metallic decorating sheet 30 with a laser gun, for example.

  Next, a method for manufacturing the door handle 10 will be described. First, the handle body 11 is molded by inserting the metallic sheet molded product 20 into the injection mold 64 shown in FIG. The injection mold 64 includes male and female molds 65 and 66. The female mold 65 is formed with a recess 67 that is recessed in accordance with the shape of the metallic sheet molded product 20. The recess 67 has such a depth that the metallic sheet-formed product 20 can be fitted only to an intermediate position between the front end and the base end of the side wall 56S. The male mold 66 is formed with a hill portion 68 bulging toward the recess 67, and a resin injection path 69 is formed so as to open to a part of the hill portion 68.

  The male mold 66 includes slide molds 80 and 80 that are movable in a direction orthogonal to the mold opening / closing direction of the male and female molds 65 and 66. The slide die 80 has a notch 81 having an arc-shaped molding surface 81M at the end on the female die 65 side. In addition, as shown in an enlarged view in FIG. 13, a texture 82 is formed on the entire molding surface 81 </ b> M of the notch 81 by a texture processing technique such as sandblasting or etching. And the whole molding surface 81M of the notch part 81 is the uneven | corrugated pattern area | region R3 which concerns on this invention.

  In order to mold the handle main body 11 using this injection mold 64, first, the ceiling portion 20T of the metallic tone sheet molded product 20 is fitted into the recess 67 as shown in FIG. Then, the male mold 65 is closed in a state where the slide molds 80, 80 are separated from the hill portion 68, and the hill portion 68 of the male mold 66 is rushed into the metal tone forming sheet 10.

  As shown in FIG. 12, when the slide dies 80, 80 are brought close to the hill portion 68, the side wall 20 </ b> S of the metal tone sheet molded product 20 comes into contact with the notch portion 81 of the slide die 80, and the metal tone sheet molded product 20 A molding space (not shown) is formed between the portion 68. At this time, the side wall 20 </ b> S of the metallic sheet-formed product 20 is addressed to a continuous curved surface constituted by the molding surface 81 </ b> M of the notch 81 and the opening-side end portion of the back surface of the recess 67, and the side wall The outermost protruding end of 20S is located on the gap line K1 (see FIG. 13) between the female mold 65 and the slide mold 80.

  Then, the molding body is filled with a molten resin (for example, a molten resin of PC-PBT alloy) through the injection path 69 in the molding space. At this time, the embossed pattern 82 is transferred to the metallic-tone sheet molded product 20 by the uneven pattern region R3 (that is, the molding surface 81M of the slide die 80). Further, a gap line K1 between the slide mold 80 and the female side mold 66 is transferred to a portion of the metal-like sheet molded product 20 that covers the side protruding end 17T of the handle body 11, and a transfer gap line K2 is formed. The As a result, the embossed pattern 82 is transferred to a portion of the outer surface of the metallic tone sheet molded product 20 that is located closer to the door 40 than the transfer gap line K2, thereby forming an uneven pattern transfer region R2.

  Next, when the injection mold 64 is cooled and the molten resin is solidified, the slide molds 80 and 80 and the male and female molds 65 and 66 are opened. Thereby, the molding process of the handle body 11 is completed. Although not shown, the injection mold 64 is provided with a plurality of slide molds in addition to the slide molds 80 and 80, and the fixed legs 12A and 12B (see FIG. 4) are molded by the slide molds.

  Next, the electrostatic capacity sensor 15 is accommodated in the accommodating recess 17 of the handle body 11, and the separately manufactured back cover 14 is screwed to the handle body 11 to close the accommodating recess 17. As a result, the capacitance sensor 15 is built in the door handle 10, and the portion of the exposed surface of the door handle 10 excluding the back surface belt-like region R <b> 1 is decorated with a metallic tone in the metallic tone sheet molded product 20.

  Thus, according to this embodiment, the uneven pattern region R3 is formed on the cavity inner surface of the injection mold 64, and the boundary line between the uneven pattern region R3 is defined between the slide mold 80 and the female mold 65. Since the gap line K1 coincides with the gap line K1, the transfer gap line K2 in which the gap line K1 is transferred to the metallic sheet molded product 20 is defined as a boundary line between the area where the wrinkles 82 are transferred and the area where the wrinkles 82 are not transferred. You can show it as if it were. Thereby, the transfer gap line K2 transferred to the metallic tone sheet molded product 20 can be made inconspicuous. In addition, since the texture processing is generally performed also on metal parts, the metallic decoration effect is not reduced by transferring the texture 82.

  Further, in the present embodiment, the transfer gap line K2 can be made inconspicuous by using the concavo-convex pattern transfer region R2 to which the texture 82 is transferred as a slip stopper to the grip portion 10G of the door handle 10. Furthermore, since the concave / convex pattern transfer region R2 is disposed on the back surface of the grip portion 10G, the influence of the concave / convex pattern transfer region R2 on the appearance of the entire door handle 10 can be reduced.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

  (1) In the said embodiment, although the example which applied this invention to the manufacturing method of the door handle 10 was shown, you may apply to manufacturing methods, such as a gear lever, a wheel cap, a door mirror cover, a console, and a door trim, for example.

  (2) The “concavo-convex pattern” according to the present invention may be a geometric pattern such as a rosette pattern or a checkered pattern.

  (3) In the above-described embodiment, the concave / convex pattern region R3 is formed on the entire molding surface 81M of the slide mold 80, but may be formed on a part of the molding surface 81M as shown in FIG.

  (4) In the above embodiment, the texture 82 is formed on the slide mold 80, but the texture 82 may be formed on the female mold 65 as shown in FIG. 15.

  (5) Like the injection mold 64V shown in FIG. 16, the boundary line of the concavo-convex pattern region R3 is made to coincide with the clearance line between the male mold 65 and the female mold 66V, that is, the parting line PL. May be.

DESCRIPTION OF SYMBOLS 10 Vehicle door handle 20 Metal-tone sheet molding 30 Metal-tone decorative sheet 64, 64V Injection mold 65 Female side die 66, 66V Male side die 80 Slide die 81 Notch 81M Molding surface 82 Wrinkles )
K1 gap line K2 transfer gap line PL parting line R2 uneven pattern transfer area R3 uneven pattern area

Claims (1)

The metal-like sheet molded product (20) molded from the metal-like decorative sheet (30) is set in a state of being superimposed on the cavity inner surface of the injection mold (64), and the cavity is filled with a molten resin, A vehicle resin molded product (10) manufacturing method for molding a vehicle resin molded product (10) whose outer surface is covered with a molded sheet molded product (20),
A concavo-convex pattern region (R3) for transferring the concavo-convex pattern (82) typified by a texture to the metal-tone sheet molded product (20) is formed on the cavity inner surface of the injection mold (64), The boundary of the concavo-convex pattern region (R3) is made to coincide with the gap line (K1) between the component molds (65, 80) of the injection mold (64) represented by the parting line in the cavity. A method for producing a resin molded article for a vehicle (10), characterized in that:

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