JP2006175639A - Three-dimensional leather insert-molded product and its molding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable manufacture of a three dimensional insert-molded product of leather or synthetic leather having a"soft feeling", and provide an insert-molded product of leather free from "wrinkles" in a corner part and provided with "stiffness" to the leather by bonding or welding a resin plate to the back of the leather to be inserted. <P>SOLUTION: A liquid droplet discharge control device is constituted of the surface leather or synthetic leather 11 preliminarily molded into a three-dimensional shape, a surface layer comprising the resin plate 13 integrated with a substrate through an adhesive (or thermal welding) 12 and the back injection-molded resin 15 integrated with the resin palate 13 by an adhesive 14 or thermal welding. The method of insert-molding the three-dimensional leather insert molded product comprises the steps of punching the integrated product of the the leather or synthetic leather 11 as the surface layer and the resin plate 13 in a developed shape with respect to a final shape, forming the punched shape into the shape of a three-dimensional leather molded product approximated the final shape by air-pressure forming, vacuum forming or press processing to form a three-dimensionally-shaped leather product, inserting this shaped leather product in an injection mold and injecting the resin in the back thereof. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a three-dimensional leather insert molded article and a molding method thereof.

  Conventionally, a film insert molded product has a film layer 2 such as PET on the surface of the injection-molded resin layer 1 as shown in FIG. 6 (FIG. 6 (a)), and a film layer 2 such as PET on the back side. When applied (FIG. 6B) was common.

  Such a film insert molded product is a film that has patterns, letters, company names, etc. printed on the front and back surfaces (including double-sided printing) of the molded product in a state close to the final shape in advance by vacuum forming or pressure forming. After rough processing, the rough processed film was inserted (set) into an injection mold, and then the resin was injected and molded.

  The conventional insert-molded product thus molded has an image of “hard” or “cold” when it touches PET (polyethylene terephthalate), which is the material of the film layer on the surface, or an injection-molded resin surface. was there. For this reason, for parts that require a soft feeling, leather (leather) or the like is used instead of a material resin such as PET, PC (polycarbonate), ABS (acrylonitrile, butadiene, styrene ternary polymer resin) on the surface layer. There is also an example in which film insert molding is performed.

  There are also examples of 3D-shaped products with leather specifications printed on the insert film like leather, but the image of “hard” or “cold” just exists as if it looks like leather. It was.

  Therefore, even if the leather is inserted, the leather is soft, so there is no “koshi (waist)”, and there is a problem that insert displacement is likely to occur when this is inserted into the injection mold. By inserting leather or synthetic leather in this way, a soft feeling can be obtained in the product, but when it becomes a three-dimensional shape, the flow of the injection molding resin and the resin pressure of the injection molding resin cause the product to become soft as shown in FIG. There was a tendency for wrinkles to come close to corners and design surfaces, and the product defect rate tended to be high. Incidentally, FIG. 7A shows a portion having a concave R (concave curved surface) at the corner, and FIG. 7B shows a portion having a convex R (convex curved surface) at the corner. It is easy to occur.

  Moreover, even if the material such as PET has been printed on the conventional material, even if it looks like leather at first glance, it has not been possible to give the texture of the leather's oldness (or dirt in some cases) when used.

Incidentally, in order to bring out the texture of genuine leather, the molding of a three-dimensional leather molded product in which the leather itself was inserted was molded through the following molding process.
(Step 1) The leather (leather) or synthetic leather used for the surface layer is punched. In this case, leather (leather) or synthetic leather is punched out (trim) in a developed shape for the finished product.
(Step 2) The unfolded leather (leather) or synthetic leather punched in step 1 is inserted into an injection mold.
(Process 3) The resin is injection-molded and integrated with the surface leather or synthetic leather. As a result, leather (leather) or synthetic leather is formed into a desired shape by the injection pressure of the injection molding resin, and the final product should be obtained. However, when the final product is a three-dimensional shape, the corner of the product Generation of wrinkles of leather or synthetic leather was inevitable in the part, that is, the part indicated by reference numeral 23 in FIG.

INDUSTRIAL APPLICABILITY The present invention enables insert molding of leather or synthetic leather that can break the image of “hard” or “cold” that was unavoidable in conventional film insert molded products, and insert molding with “soft feeling”. Providing goods,
In addition, leather insert molding, which can only be performed up to the two-dimensional shape of the past, is also possible for the molding of the three-dimensional shape, and provides a highly accurate three-dimensional molded product that does not generate “wrinkles” at the corners of the product. ,
Furthermore, by attaching or welding a resin plate to the back side of the leather to be inserted or synthetic leather, the resin plate has a role as an intermediate cushioning material, and the leather or synthetic leather to be the surface layer has a “waist” to provide more accuracy. Enabling high insert molding,
And by having a “waist”, it is possible to emboss the surface leather or synthetic leather part as well as conventional film inserts,
Furthermore, to provide an insert molded product that can bring out the texture (age) of the leather that becomes the surface layer when a product using leather or synthetic leather is used.
It is an object of the present invention to provide a three-dimensional leather insert molded product and a molding method thereof that enable the above-described various matters.

Therefore, the three-dimensional leather insert molded product of the present invention is
A surface layer composed of leather or synthetic leather previously molded into a three-dimensional shape, and a resin plate adhered to the back surface of the leather or synthetic leather via an adhesive or by heat welding, and a resin constituting the surface layer It consists of the back surface layer which consists of the injection-molded resin layer closely_contact | adhered and integrated to the back surface of the plate through an adhesive or by heat welding.
The resin plate is made of a resin plate such as PET, PC, or urethane (the thickness of which is changed as necessary).
Furthermore, a surface layer composed of leather or synthetic leather pre-formed into a three-dimensional shape, and a resin plate adhered to the leather or synthetic leather via an adhesive or by heat welding, and a resin constituting the surface layer It consists of a back surface layer made of an injection molded resin that is tightly integrated with the back surface of the plate by an adhesive or heat welding, and a pressure layer or vacuum molding or press is formed on the surface layer composed of the leather or the synthetic leather and the resin plate. An embossed part was formed by processing, and the layer of the injection molding resin was not provided at the part on the back layer side corresponding to the embossed part formed on the surface layer.
Furthermore, a surface layer composed of leather or synthetic leather previously molded into a three-dimensional shape, and a resin plate adhered to the back surface of the leather or synthetic leather via an adhesive or by heat welding, and the surface layer The resin plate comprises a back surface layer made of injection molded resin that is tightly integrated with an adhesive or by heat welding on the back surface of the resin plate, and the resin plate having the embossed portion only on the resin plate constituting the surface layer, The leather or synthetic leather side portion corresponding to the embossed portion formed in the above has no embossed portion, and the back surface layer side portion corresponding to the embossed portion has no injection molded resin layer.
And the surface layer comprised by the leather or synthetic leather previously shape | molded by the three-dimensional shape, and the transparent resin plate closely_contact | adhered to the back surface of the said leather or synthetic leather via the adhesive agent or by heat welding, and the said transparent resin It consists of a back surface layer made of an injection-molded resin layer that is closely integrated with the back surface of the plate via an adhesive or by heat welding. An embossed portion is provided only on the transparent resin plate that constitutes the surface layer, and is provided on the transparent resin plate. The embossed part was an LCD transparent window part, and the lower part of the LCD window part was an LCD installation part.
Moreover, the molding method of the three-dimensional leather insert molded product of the present invention includes the following four steps:
(Step 1) A step of laminating the leather layer constituting the surface layer and the resin plate with an adhesive or by heat welding and closely integrating them,
(Step 2) A step of punching the one integrated in Step 1 with a developed shape of a three-dimensional leather molded product,
(Step 3) A step of molding the one punched in Step 2 into a three-dimensional leather molded product shape close to the shape of the product by pressure forming, vacuum forming or hot pressing,
(Step 4) The three-dimensional molded product molded in the step 3 is inserted into an injection molding die, an injection molding resin is injected into the back surface of the molded product, and between the resin plate and the injection molding resin. A step of forming a back surface layer by integrating them by thermal welding of an adhesive or resin interposed therebetween.

By integrating a resin plate on the back of the leather to be inserted or synthetic leather via an adhesive or by heat welding, this serves as an intermediate cushioning material, and "waist" on the leather or synthetic leather that becomes the surface layer It is possible to achieve insert molding with higher accuracy.
And by giving "waist", it became possible to attach a highly accurate embossing to the surface leather or synthetic leather part similarly to the conventional film insert molded product.
Furthermore, when the molded article according to the present invention is used, the surface color of the leather deteriorates (wears), and the natural texture (oldness) of the leather can be brought out.
Thus, it becomes possible to mold a leather or synthetic leather insert molded product that breaks the image of “hard” or “cold” that was unavoidable in conventional molded products, and has a “soft” surface layer 3 Dimensional insert molded product could be obtained.
In addition, high-precision leather or synthetic leather insert molding, which could only be performed up to a two-dimensional shape in the past, can be molded with a high accuracy up to a three-dimensional shape with no “wrinkles” at the corner of the product.

A description will be given with reference to FIG. The three-dimensional leather insert molded product according to the present invention is composed of a back surface layer 15 integrated with a surface layer 10. The surface layer 10 includes a leather or synthetic leather (hereinafter simply referred to as “leather”) 11 molded in a three-dimensional shape in advance, and a resin that is bonded and integrated with the back surface of the leather 11 with, for example, an adhesive 12. It consists of a plate 13.
Further, the back surface layer 15 is composed of an injection molded resin layer that is tightly integrated with the resin plate 13 constituting the front surface layer 10 with an adhesive 14, for example. In this case, it is preferable to use a resin plate such as PET, PC or urethane as the resin plate 13.
In order to integrate the leather 11 and the resin plate 13 with each other through, for example, an adhesive 12, it is preferable to use a thermoplastic resin such as ABS as the adhesive 12. Further, in order to tightly integrate the leather 11 of the surface layer 10 and the resin plate 13, the adhesive 12 can be used instead of the resin 12, and the resin can be adhered by heat welding instead. Further, in the integration of the resin plate 13 and the injection molding resin layer constituting the back surface layer 15, for example, the adhesive 14 is interposed, but thermal welding by the resin temperature at the time of injection molding is possible without using the adhesive.

Next, another embodiment will be described with reference to FIG.
FIG. 2 shows the leather 11 of the surface layer 10 and the resin plate 13 embossed. In FIG. 2, reference numeral 11 denotes leather constituting the surface layer 10, reference numeral 13 denotes a resin plate closely adhered and integrated therewith, and reference numeral 15 denotes an injection-molded resin layer constituting the back surface layer.

  This laminated structure is basically the same as the laminated structure of FIG. However, in FIG. 2, the embossed portion 16 is provided on the leather 11 and the resin plate 13 integrated with the pressure plate, vacuum forming, or pressing. In the injection of the injection molding resin constituting the back layer, the injection molding resin is not injected into the portion 17 corresponding to the embossed portion 16.

  Next, FIG. 3 is similar to the cross-sectional configuration of FIG. 2, but the embossed portion 18 is formed only on the resin plate 13 of the surface layer. The leather 11 of the surface layer surrounds the embossed portion 18 and exists only in the periphery thereof, and the embossed portion 18 formed on the resin plate 13 is exposed.

  In the molding method of the molded product of FIG. 3, first, a cutout portion 19 is provided in which a portion corresponding to the embossed portion 18 of the leather 11 on the surface is cut into a shape in which the embossed portion 18 is exposed. Then, after the leather 11 and the resin plate 13 are integrated through, for example, an adhesive or by heat welding, a slight embossing is performed in advance by pressure forming, vacuum forming, or pressing to form an embossed portion 18 on the resin plate 13. . Thereafter, this is inserted into a mold and injection molding resin is injected. In this case, as in FIG. 2, the injection molding is performed except for the portion 17 corresponding to the embossed portion 18.

  Since the embossed portion 16 or 18 can be formed as shown in FIGS. 2 and 3, it is possible to mold a three-dimensional leather molded product having a display window 21 of an LCD (Liquid Crystal Disk Display Board) as shown in FIG. .

  In FIG. 4, a cutout portion 19 into which the LCD display window portion 21 enters is provided in the leather layer 11 on the surface, and the LCD display window portion 21 is formed in this portion. The LCD display window portion 21 is made of a transparent resin plate 20, and an LCD 22 is provided on the back side of the display window portion 21 (see FIG. 4C). As in FIG. 3, the embossed portion 21 is provided only on the transparent resin plate 20, and the LCD 22 is installed in this space without injection molding resin being injected into the portion on the back side corresponding to the embossed portion 21.

  FIG. 5 is a composite example of FIG. 3 and FIG. 4, and a configuration in which the embossed portion 18 is provided only on the resin plate 13 on the left side of the diagram as in FIG. 3, and the LCD transparent on the right side of FIG. A window portion 21 is provided, and an LCD 22 is provided on the back side thereof. As described above, the surface structure can be divided into a leather range and a portion subjected to normal printing, and various variations in design are possible.

It is sectional drawing of the three-dimensional leather insert molded product concerning this invention. It is a longitudinal cross-sectional view of the molded article provided with the embossed part in the surface layer which consists of surface leather and a resin plate. It is a longitudinal cross-sectional view of the molded product provided with the embossed part only in the resin plate part. (A) is a longitudinal cross-sectional view of the molded article provided with the LCD transparent window part. (B) is a perspective view of the molded product provided with the embossing part and the LCD display window part, (c) is AA arrow sectional drawing of (b). It is a longitudinal cross-sectional view of the molded article provided with the composite shape of FIG. 3 and FIG. It is sectional drawing of a well-known film insert molded product, (a) shows the case where it has an insert film on the surface, (b) shows the case where it has an insert film on the back surface. The cross-sectional structure of a well-known leather insert molded product is shown, (a) is a figure which shows the wrinkle generation | occurrence | production state of the corner of the molded product which has a concave curved surface in a corner and (b) has a convex curved surface in a corner.

Explanation of symbols

10 Surface layer 11 Leather (leather) or synthetic leather (leather)
12 Adhesive (or welding) 13 Resin plate
14 Adhesive (or welding)
16 Embossed part of leather 17 (no injection molding resin) part
18 Embossed part (of resin plate)
19 Leather cutout 20 Transparent resin plate
21 LCD display window 22 LCD
23 (in the corner)

Claims (6)

A surface layer composed of leather or synthetic leather pre-formed into a three-dimensional shape, and a resin plate adhered to the back surface of the leather or synthetic leather;
3. A three-dimensional leather insert molded product comprising a back surface layer made of an injection-molded resin layer tightly integrated with a back surface of a resin plate constituting the surface layer.   The three-dimensional leather insert molded product according to claim 1, wherein the resin plate constituting the surface layer is a resin plate such as PET, PC, or urethane. A surface layer composed of leather or synthetic leather previously molded into a three-dimensional shape, and a resin plate to which the leather or synthetic leather is adhered;
It consists of a back surface layer made of an injection molding resin closely integrated with the back surface of the resin plate constituting the surface layer,
It has an embossed part in the surface layer constituted by the resin plate integrated with the leather or synthetic leather, and the back layer corresponding to the embossed part of the surface layer does not have an injection molding resin layer 3D leather insert molding. A surface layer composed of leather or synthetic leather pre-formed into a three-dimensional shape, and a resin plate adhered to the back surface of the leather or synthetic leather;
It consists of a back surface layer made of an injection molded resin layer closely integrated with the back surface of the resin plate constituting the surface layer,
The resin plate constituting the surface layer has an embossed portion only, the leather or synthetic leather side portion corresponding to the embossed portion formed on the resin plate has no embossed portion, and the back surface corresponding to the embossed portion A three-dimensional leather insert molded product characterized in that it does not have an injection-molded resin layer at the layer side. A surface layer composed of leather or synthetic leather preformed in a three-dimensional shape, and a transparent resin plate in close contact with the back surface of the leather or synthetic leather;
It consists of a back surface layer made of injection molded resin closely integrated with the back surface of the transparent resin plate,
Only the transparent resin plate constituting the surface layer has an embossed part, the embossed part provided on the transparent resin plate is an LCD transparent window part, and the lower part of the LCD transparent window part is an LCD installation part. 3D leather insert molded product. A method for forming a three-dimensional leather insert molding product comprising the following steps 1 to 4.
(Step 1) A step of laminating the leather or synthetic leather constituting the surface layer and the resin plate with an adhesive or heat welding and closely integrating them,
(Step 2) A step of punching out the leather or synthetic leather and the resin plate tightly integrated in Step 1 with a developed shape of a three-dimensional leather molded product,
(Step 3) The step of punching in Step 2 above is formed into a three-dimensional leather molded product shape close to the shape of the final product by pressure forming, vacuum forming or press processing in advance,
(Step 4) The three-dimensional molded product molded in the step 3 is inserted into an injection molding die, an injection molding resin is injected into the back surface of the molded product, and between the resin plate and the injection molding resin. A step of forming a back surface layer by integrating them by thermal welding of an adhesive or resin interposed therebetween.

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