JPH0267111A - Preparation of car door trim - Google Patents

Abstract

PURPOSE:To enhance a degree of freedom in the shaping of a product without generating the whitening draw-flowing of a skin material at the time of press integration by preliminarily preparing the skin material by preparatory vacuum molding when PVC resin leather is used as the skin material. CONSTITUTION:The outer peripheral part of a skin material 10, wherein base cloth such as a wooly ester knitted fabric is laminated to the rear of PVA leather, is set to a retaining mold 11 and sucked under vacuum at room temp. to crease the molding surface shape of a vacuum mold 12. Subsequently, a composite resin plate 15 composed of a mixture of a propylene resin becoming a core material 16 and a filler is placed on the molding surface of a cold press lower mold 14 in a heated and softened state. The skin material 10, to which the aforementioned vacuum molding is applied, is set to a cold press upper mold 13. The cold press upper and lower molds 13, 14 are engaged and clamped under pressure to integrally bond the skin material to the core material 16.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method of manufacturing a door trim for an automobile, and particularly relates to a method of manufacturing a door trim of a type using synthetic resin leather as a skin material (conventional method). For example, to explain the outline of the process of manufacturing an automobile door trim shown in FIG. 6, as shown in FIG. Install it on 3.

Moreover, on the mold surface of the lower press mold 4, there is a composite resin plate 5 in a heat-softened state that will become the core material! ! It is located (
See Figure 8 p! 4).

Then, the pressing molds 3 and 4 are engaged and pressed as shown in FIG. 9 to form the core material 5' into the desired curved shape, and at the same time, the skin material 1 and the core material 5' are It is about unification.

In another conventional example, the skin was heated and pressed in a vacuum mold to be preformed, and then the skin was set in the press mold to integrate the molten resin.

(Problem to be solved by the invention) However, 1. In the former method, the above-mentioned skin material l,
If PvC leather or the like is used as the skin material 1 in the press process for integrating it with the core material 59, problems such as whitening and streaks may occur in areas with a high expansion rate because the material does not have a heat insulating effect. There was a problem in that the degree of freedom of modeling was severely restricted.

In addition, the latter method requires two molds, which increases the cost of molds and increases the number of man-hours involved in moving work in progress.

The present invention has been made in view of these circumstances, and the purpose of the present application is to improve the moldability of the skin material even when synthetic resin leather (back fabric) such as PvC leather is used as the skin material. An object of the present invention is to provide a method for manufacturing an automobile door trim, which dramatically improves the degree of freedom in shaping the product.

(Means for Solving the Problems) In order to achieve the above object, the present invention maintains the shape of the skin material by preliminarily VaC molding the skin material made of a synthetic resin leather sheet lined with a base fabric at room temperature. a step of setting the preliminary VaC-molded skin material in a cold press mold, and *Ring a thermoplastic composite resin plate in a heated softened state on the cold press lower mold;
By engaging and tightening the upper and lower molds for cold press,
It is characterized by comprising the steps of drawing and forming a thermoplastic composite resin plate into a core material having a desired curved surface shape, and at the same time integrally bonding a skin material to the surface of the core material.

(Function) According to the Moeki means, the synthetic resin leather sheet (back fabric) used as the outer skin material is vacuum formed in advance at room temperature and held in a predetermined shape. When integrated with the skin material, it can sufficiently withstand even sudden tensile forces applied, and problems such as whitening and streaking do not occur in highly expanded areas.

(Description of Examples) Hereinafter, a method for manufacturing an automobile door trim according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 5 are side sectional views showing the manufacturing process of the door trim over time.

First, as the skin material 10, a material obtained by laminating a backing fabric such as woolly ester knitted material on the back side of PVC leather is used. (See Figure 1)
.

Then, vacuum suction is performed at room temperature, and the skin material 10 is prefabricated into the shape of the mold surface of the vacuum mold 12, and the actual product is molded (see FIG. 2).

Next, the skin material 10 subjected to this preliminary VaC molding is set in the upper die 13 for cold press (see FIG. 3).

At this time, a cold press lower mold 14 is located below the cold press upper mold 13, and a filler and polypropylene resin, which will be the material of the core material, are mixed on the mold surface of this cold press lower mold I4. Composite resin board! 5 was softened by heating and placed in H (see Fig. 4).

Thereafter, as shown in FIG. 5, the upper and lower molds 13 and 14 for cold pressing are engaged and clamped to form the composite resin plate 15 into a curved shape, and at the same time, the core material 16 is molded and preformed. The skin material 10 may be molded and integrally attached to the core material 16.

In particular, in the armrest part, which is a problem in the shaping of door trims, when we compare the case where the curvature is applied by preforming as in the present invention and the case where no preforming is applied as in the conventional case, there are differences as shown in the table below. .

(Effects of the Invention) As explained above, according to the method of the present invention, when PvC resin leather (back fabric) is used as the skin material, if the skin material is preliminarily VaC molded, the press can be integrated. No whitening or streaking of the skin material occurs when the product is stopped.
Product appearance is also good.

This has the effect of dramatically improving the degree of freedom in shaping the door trim. Further, according to the present invention, since the molds are the same, there is no movement of work-in-progress, and the number of man-hours and mold costs are reduced.

[Brief explanation of the drawing]

Figures 1 to 5 are cross-sectional views showing the manufacturing process of a door trim according to the present invention, Figure 6 is a perspective view of an automobile door trim, and Figures 7 to 9 illustrate the manufacturing process of a conventional door trim. FIG. Skin material formwork Vacuum forming mold Upper mold for cold press Lower mold core material for cold press Diagram Diagram Diagram Diagram

Claims (1)

[Claims] (1) The process of maintaining the shape of the skin material by preliminarily VaC molding the skin material, which is a synthetic resin leather sheet lined with a base fabric, at room temperature, and setting the skin material that has been preliminarily formed with VaC molding into the upper mold for cold pressing. At the same time, the thermoplastic composite resin plate is shaped into the desired shape by placing the thermoplastic composite resin plate in a heat-softened state on the lower die for cold press, and by engaging and tightening the upper and lower cold press dies. A method for manufacturing an automobile door trim, comprising the steps of drawing and forming a core material having a curved surface shape, and simultaneously attaching a skin material to the surface of the core material.