JPS58203050A - Method of molding interior finish material for automobile - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of molding an interior material for an automobile in which a cushioning material is integrated into the back surface portion.

For example, in automobile interior materials that are molded to match the surface shape of each part of the inner panel of the automobile, such as automobile door trim, dash side trim, body side trim, etc., and are attached to the inner panel, In order to prevent the interior materials from wobbling due to the gaps between the interior materials, a cushioning material is attached to the back of the interior materials in advance, and when the interior materials are attached to the inner panel, there is no need to intervene in this darkness. The interior material is tightly fixed to the inner panel by compressing the cushion material.

However, in order to attach this type of cushioning material to the interior material, the cushioning material is assembled using an adhesive in a separate process after the interior material is molded, so the number of man-hours per piece of interior material is reduced. Moreover, the adhesive tends to deteriorate the working environment.

The present invention has been made in view of the above-mentioned conventional drawbacks, and its object is to integrally assemble the above-mentioned cushioning material at the time of molding the interior material.

In order to achieve the above object, the method of the present invention involves installing a cushioning material in advance on the mold surface of a press molding die for molding interior materials, and then installing a resin plate constituting the interior material in a semi-molten state on this. Then, by pressing this, the cushioning material is integrally fixed to the back surface of the molded interior material.An example of the molding method of the present invention will be described below with reference to the drawings. This will be explained in detail.

1 to 4 show the molding sequence of the present invention. In each figure, 1 is a lower mold having a mold surface 1a having a predetermined curved shape on its upper surface, 2 is an upper mold having a mold surface 2a that engages with the lower mold 1, and these upper and lower molds are respectively 1.2
As shown in FIG. 1, slab urethane or the like is placed at appropriate positions on the mold surface 1a of a press molding die of appropriate dimensions.
A cushion material 3 cut to a certain thickness is fixed in place.

The method for setting the cushion material 3 is not shown in the drawings, but a sheet with a high surface friction such as a positioning bottle or sandpaper is fixed in advance at the installation position of the cushion material 3 on the mold surface 1a. The cushion material 3 can be prevented from moving during molding by laying it in the mold surface 1a or by forming a shallow groove-shaped fixing mold hole at the cushion material installation position on the mold surface 1a.

In FIG. 1, the upper mold 2 is separated from the lower mold 1 by 1 minute and is in the preparation stage for molding. In this state, the cushioning material 3 is fixed as described above, and then the composite resin plate 4 is plasticized by heating in advance. is placed on the lower mold 1.

A sheet material 4a such as a decorative carpet is integrated in advance on the upper surface of this composite resin board 4, and in this state, the composite resin board is heated to near the melting point of the composite resin board 4 using a heating furnace or the like. 4 is placed on the mold surface 1a of the lower mold 1 in a heat-plasticized state (see FIG. 2).

Next, when the upper mold 2 is directly engaged with the lower mold 1 in this installed state, the composite resin plate and the decorative sheet material 4a are press-molded along the cavity shapes of both mold surfaces 1a and 2a. At the same time, the cushioning material 3 placed on the lower surface of the composite resin plate becomes thinner in a flattened state due to the pressure applied, and even in the thinner state, it becomes slightly thicker, so it is difficult to heat plasticize as described above. The composite resin plate 4 is inserted into the molded composite resin plate 4 (see FIG. 3).

Next, when the composite resin plate 4 is cooled and solidified with the upper mold 2 engaged in this manner, the upper mold 2 is placed over the lower mold 1 for 1.11 minutes, and the molded product is placed on the lower mold 1. When the mold is removed from above, the cushioning material 3, which has been flattened and under pressure P1 due to the press forming as described above, expands and recovers again as the pressure is removed, and as a result, it is molded as shown in FIG. It is expanded and recovered while being fixed semi-buried on the back of the item. The bonding between the composite resin plate 4 and the cushioning material 3 is such that the surface of the pores 11 of the cushioning material is
They are joined in a state where they are indented in a concave and convex shape, and the anchoring effect between the two creates a good joint state.

As explained above, depending on the molding method of the automobile interior material according to the present invention, the cushioning material is integrally joined at the same time as the press molding of the interior material as described above. This eliminates the need for processes such as molding the interior material and then gluing the cushioning material together, and also eliminates the need for adhesives, as well as the ability to prevent deterioration of the working environment due to the use of adhesives. has.

[Brief explanation of drawings]

1 to 4 are explanatory cross-sectional views showing the order of the molding method according to the present invention, and FIG. 5 is an enlarged cross-sectional view of the circular line portion in FIG. 4. 1... Lower mold 1a... Mold surface 2... Upper mold 2a... Mold surface 3... Cushion material 4... Composite resin plate (thermoplastic resin plate) Utility model registration applicant

Claims (1)

[Claims] (1) Positioning and fixing a cushioning material with swelling recovery properties at an appropriate position on the mold surface on the lower die of a press molding die;
A step of installing a heated semi-molten thermoplastic resin plate on the mold surface of the lower mold from the -L side of this cushioning material, and then immediately engaging the upper mold onto the lower mold to properly adjust the resin plate. A step of molding the cushioning material into a molded product with a curved surface shape, compressing and flattening the cushioning material, and fixing the cushioning material in a semi-buried manner on the back surface of the molded product, and removing the molded product to restore the cushioning material to swelling. A method of forming automotive interior materials.