JPH04286630A - Molding method for resin component - Google Patents

Abstract

PURPOSE:To reduce the molding process to a large extent and improve productivity by combinedly carrying out the vacuum molding process and the press molding process. CONSTITUTION:A laminate sheet 10 composed of a skin layer 12 with a foamed layer 12 is molded by a vacuum molding tool 14 to manufacture a molded product. Then, a core material molding sheet 16 is disposed to be positioned on the molded product located on said vacuum molding tool 14. Then the core material molding sheet 16 and the molded product are press molded by combining the vacuum molding tool 14 and a press mold to manufacture a formed product. Then, the formed product is trimmed and manufactured as a finished product.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for molding resin parts, such as a lid member for a console box or a glove box, which are interior parts for automobiles.

0002

2. Description of the Related Art The conventional structure of a glove box lid, which is a type of automobile lid member, is as shown in FIGS. 1 and 2.
It is composed of a lid main body 1 and an inner cover 5,
This lid body 1 includes a core material 2 press-formed from a steel plate, a skin 3 that is adhered to the surface of the core material 2 and vacuum-formed from a soft resin, and the skin 3 and the core material 2. is set in a foaming mold, and a cushion layer 4 is formed by injecting and foaming urethane between the two. The inner cover 5 is made of hard resin and is injection-molded in a shape to be attached to the back side of the lid body 1. When the inner cover 5 is fixed to the back side of the lid body 1 with the mounting screws 6, this inside A hinge member 7 is interposed between the cover 5 and the lid body 1, and the lid body 1, the hinge member 7, and the inner cover 5 are joined together to form the intended glove box lid body 8. be.

0003

[Problems to be Solved by the Invention] However, in the configuration of the glove box lid body 8 having such a structure,
Each process is necessary, including the pressing process of the core material 2, the vacuum forming process of the skin 3, the foam molding process of the cushion layer 4, the injection molding process of the inner cover 5, and the assembly process of the lid body 1 and the inner cover 5. However, not only is the productivity low, but the production cost is also high, which poses a problem in the economic efficiency of the product.

0004

[Means for Solving the Problems] The present invention has been made in view of this problem, and involves forming a primary molded product by vacuum forming a laminate sheet in which a skin layer and a cushion layer are laminated, and then molding the primary molded product. A method of molding a resin part is provided, in which a softened core molded sheet is placed on the molded product, and the primary molded product and the core molded sheet are press-molded to form an integrated secondary molded product.

Therefore, according to this embodiment, the vacuum molding mold used for molding the primary molded product can also be used as a press molding mold, so that the molding equipment can be simplified. Furthermore, since the molding process to obtain the finished product only requires two steps: a vacuum forming process and a press molding process, the molding process can be simplified, making it a highly productive and economical molding method for resin parts. Can be provided.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below based on embodiments shown in the drawings.

In FIGS. 3 to 7, 10 is a sheet material for vacuum forming a primary molded product, and this sheet material 10 is a laminate sheet in which a skin layer 11 and a foam layer 12 are laminated together. This laminate sheet 10
The skin layer 11 is an olefin or vinyl chloride sheet, and the foam layer 12 is made of polypropylene foam (for example, Toray Pef, a product of Toray). After the laminate sheet 10 having such a structure is heated to about 200° C. to 230° C. by the heater 13 to soften it, the softened laminate sheet 10 is placed in a vacuum mold 14.
The laminate sheet 10 is primarily formed by the vacuum action of the vacuum mold 14 (see FIG. 4).

Next, a stampable sheet 16 (this stampable sheet is made of polypropylene resin) is heated and softened at around 200° C. by a heater 15 on top of the primary molded product 10 on the vacuum mold 14. A metal hinge 17 formed in advance is inserted between one side of the laminate sheet 10 and the stampable sheet 16. . Therefore, the laminate sheet 10 and stampable sheet 16 are heated and pressed together using a pressure mold 18 corresponding to the vacuum mold 14 and the vacuum mold 14 to obtain a secondary molded product 19. Further, if it is desired to decorate the inner surface of the molded product 19, the fabric 16-1 or the like may be overlapped and press-molded during pressurization.

Next, by trimming the edges of this secondary molded product 19 with a cutter 20, a finished product 21 shown in FIG. 8, for example, is obtained.

[0010] When producing the finished product 21, if it is desired to make the finished product 21 thicker, a stampable sheet is further inserted between the stampable sheet 16 and the laminate sheet 10 immediately before the pressing step. By stacking them and performing so-called multilayer molding, a finished product 21 having a desired thickness can be press-molded.

Therefore, according to the present embodiment, the step of forming a primary molded product by vacuum forming a heat-softened laminate sheet, and pressurizing the heat-softened stampable sheet to the primary molded product to form a core material. Since the desired molded product can be obtained through the secondary molding process and the final trimming process, the number of molding processes can be significantly reduced compared to the conventional example, and production can be increased.

Furthermore, the molding equipment according to the present invention can mold the desired molded product using two types of molds: a vacuum molding mold and a press mold corresponding to the vacuum molding mold. Sexuality is enhanced.

[0013]

As described above, in the present invention, a primary molded product is obtained from a laminate sheet 10 in which a skin layer 11 and a foamed layer 12 are laminated using a vacuum mold, and then a primary molded product is placed on the vacuum mold. Core material forming sheet 1 on the molded product
6, the molding sheet 16 and the primary molded product are press-molded using a combination of the vacuum forming mold and the press mold to obtain a secondary molded product, and then this secondary molded product is trimmed. Since this is a molding method for resin parts that will be made into finished products, it involves the steps of vacuum forming a heat-softened laminate sheet into a primary molded product, and adding a heat-softened stampable sheet to the primary molded product. The desired molded product can be obtained through a secondary molding process in which the core material is pressed and a final trimming process, so compared to conventional methods, the number of molding processes can be significantly reduced and production can be increased. .

Furthermore, the molding equipment according to the present invention can mold a desired molded product using two types of molds: a vacuum molding mold and a press mold corresponding to this vacuum molding mold, so that the cost of molded products can be improved by reducing the equipment. The effect is that the sex is enhanced.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a conventional molded product.

FIG. 2 is a sectional view of a conventional product.

FIG. 3 is an explanatory diagram of a molded product forming process according to the present invention.

FIG. 4 is an explanatory diagram of a molded product forming process according to the present invention.

FIG. 5 is an explanatory diagram of a molded product forming process according to the present invention.

FIG. 6 is an explanatory diagram of a molded product forming process according to the present invention.

FIG. 7 is an explanatory diagram of a molded product forming process according to the present invention.

FIG. 8 is a perspective view of a molded article according to the present invention.

[Explanation of symbols]

10... Sheet material 11...
Epidermal layer 12...foaming layer
13... Heater 14... Vacuum forming mold
15... Heater 16... Stampable sheet
16-1...Fabric, etc. 17...Hinge
18...Pressure mold 19...Secondary molded product 20...Cutter 21...Finished product

Claims (1)

[Claims] Claim 1: A laminate sheet (10) in which a skin layer (11) and a foam layer (12) are laminated is used in a vacuum mold to obtain a primary molded product, and then the primary molded product is placed on the vacuum mold. A core material forming sheet (16) is placed on top, and the forming sheet (16) and the primary molded product are press-molded using a combination of the vacuum forming mold and the press mold to form a secondary molded product. 1. A method for molding resin parts, the method comprising: obtaining a molded product, and then trimming the secondary molded product to form a finished product.