JPS58217351A - Manufacture of 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 for manufacturing an automobile interior material having a pattern formed on its surface, and in particular improves the working environment, improves the quality of the resulting product, and facilitates automated production. The present invention relates to a method for producing an interior material for an automobile, which has various advantages such as being able to perform the following steps.

Automotive interior materials are usually produced by sandwiching synthetic resin foams 3 such as those shown in FIG. 1(a) to form a laminate 4, and then forming an outer skin sheet as shown in FIG. 1(b). A desired pattern is formed on the surface of the outer skin sheet by heat-sealing the 49th location, for example, the 41st location on the substrate 1 using a welder, and the folded portion 2a of the outer skin sheet 2 is folded to the back surface of the substrate. The synthetic resin foam 3 is manufactured by fixing it to the edge 1a (edge part) of the back surface of the substrate with an adhesive. Attempts have been made to use foams whose entire surface is treated with an adhesive. However, such a method is uneconomical because the adhesive treated foam is expensive.

Further, after spraying or brushing an emulsion type adhesive or a solvent type adhesive on the 42 openings in FIG. 1(b) of the substrate 1, three layers are laminated as shown in FIG. 1(a). Next, as shown in FIG. 1(b), the 42 openings are heat-sealed using a welder, and then the folded portion 2a is
There is also known a irrigation method in which the substrate is fixed to the end portion 1a of the back surface of the substrate using an adhesive similar to that described above and a coating method similar to that described above. However, this method not only deteriorates the working environment due to the solvent contained in the adhesive, but also makes the quality of the resulting product unstable due to variations in the amount of adhesive applied. Since the process of applying adhesive to the substrate and the process of applying adhesive to the edge 1a of the back surface of the substrate are performed separately, the process is complicated and automatic application is difficult.

Furthermore, there is also a method in which after sandwiching an adhesive sheet between the substrate 1 and the synthetic resin foam 3 in FIG. 1 (al) (not shown), the process of FIG. Although this method wastes adhesive, it is also economically undesirable.The purpose of the present invention is to improve the working environment, improve the quality of the products obtained, and improve production efficiency. Not only is the process simplified and automation possible, but it is also economically inexpensive.
It is an object of the present invention to provide a method for manufacturing an interior material for an automobile, which improves all the drawbacks of the above-mentioned known techniques.

In order to achieve the above object, according to the present invention, a substrate;
A synthetic resin foam and an outer skin sheet are laminated so as to sandwich the synthetic resin foam, and then desired portions of the outer skin sheet are heat fused to the substrate to form a desired pattern on the surface of the outer skin sheet. In the method for manufacturing an automobile interior material, in which the folded part of the outer skin sheet to the back surface of the substrate is fixed to the edge (or peripheral edge) of the back surface of the Ikko board, the outer skin sheet is heat-sealed to the outer skin sheet on the substrate. The hot melt adhesive powder is applied only through a screen with a pattern cut out, and at the same time, the hot melt adhesive powder is electrostatically applied to the edge of the back side of the substrate, and then the applied hot melt adhesive powder is The present invention is characterized in that it uses a substrate which is formed by fixing on the substrate by thermal melting.The present invention will be described in detail below with reference to the accompanying drawings. FIG. 2 shows a manufacturing process diagram of a substrate used in the present invention, and FIG. 3 shows a substrate according to the present invention manufactured by the manufacturing process shown in FIG. b) shows the back side.

First, the manufacturing process of the substrate used in the present invention will be explained using FIG. In FIG. 2, reference numeral 1 denotes a board, specifically, for example, a hard board.

A screen 10'f is placed on the front (upper) side of the substrate 1, and a known electrostatic coating device 11 is placed on the back (lower) side. The screen 10 is formed by cutting out a desired pattern 12, and after placing the hot melt adhesive powder 13 on the screen 10, the hot melt adhesive powder 13 is moved by moving the squeegee 14 in the direction of the arrow. The hot melt adhesive powder 13 falls onto the substrate 1 through the holes in the pattern 12, and is applied to the locations on the substrate 1 that are to be heat-sealed, such as the locations A and A of FIG. At the same time as the above-mentioned application, on the back side of the substrate 1, a part of the edge 1a is applied.
Hot melt adhesive powder 13 (not shown in FIG. 2)
is applied electrostatically by the electrostatic coating device 11 (powder 13
is scattered in the direction of the arrow and is not masked. End 1
0) Electrostatic coating device 11 that reaches and electrically adheres to a
As a coating device, a coating device having a flat plate electrode, for example, BPE manufactured by Prennenstool GmbH (West Germany) is used. Since the electrostatically applied hot melt adhesive powder 13 is charged with static electricity, it will not fall off for a while even on the back side of the substrate 1.During this period, the hot melt adhesive powder 13 described above is subsequently applied. The substrate 1 is moved in the direction of the arrow and guided into the heating furnace 15, where it is heated at a temperature of, for example, 1β0°C to 150°C for about 60 seconds to form the hot melt adhesive powder 1.
3 is fixed on the substrate 1 by thermal melting, as shown in FIG. 3(a),
A substrate 1f as shown in FIG.
20H, etc.), but the present invention is not limited to such adhesives, and any known adhesive may be used.

As shown in FIG.
Then, as shown in FIG. 2a to hot melt adhesive powder 1
The material is fixed to the end portion 1a of the fixed back surface of No. 3 by heat fusion to obtain an automobile interior material having a pattern formed on the surface. In addition, as the outer skin sheet used in the present invention, for example, a synthetic resin sheet such as polyvinyl chloride:'i, a cloth sheet, etc. is used, and as the synthetic resin foam, for example, a polyurethane resin foam, a polyvinyl chloride resin foam, etc. are used. .

As described above, according to the present invention, hot melt adhesive powder is used instead of conventional solvent-type or emulsion-type adhesives when manufacturing boards, so there is no volatilization of solvents, etc., and the work environment is therefore improved. In addition, since the adhesive is applied using a screen and an electrostatic coating device, there is no variation in the amount of adhesive applied, which improves the quality of the resulting product. Since the application can be done simultaneously, the production process is simplified and automation is possible, and because the adhesive can be easily applied only to the required predetermined areas, there is no waste of adhesive.
Furthermore, it is extremely economical from this point of view as there is no need to use expensive adhesive-treated foam as in the past as a synthetic resin foam.

[Brief explanation of the drawing]

FIG. 1(a) shows a sectional view of the interior material for an automobile before heat fusion, FIG. 1(b) shows a sectional view of the material after heat fusion, and FIG. 2 shows a sectional view of the material used in the present invention. The manufacturing process diagram of the board is shown.
FIGS. 3(a) and 3(b) respectively show perspective views of the front and back surfaces of the substrate obtained by the manufacturing process shown in FIG. 2. σ 1...substrate, 1a...edge, 2... Outer skin sheet, 2a...Folded part, 3...Synthetic resin foam, 4...1t1.10...Screen, 12 shell pattern, 13...Hot melt adhesive powder, 41 mouths...・Heat-sealed parts on the substrate or outer skin, patent applicant: Kasai Kogyo Co., Ltd., Kyoritsu Kagaku Sangyo Co., Ltd., Toagosei Kagaku Kogyo Co., Ltd. Answer 1 (σ) (E) 2 blinds 3 vices 3 mochi (0 ,＞ (II in

Claims (1)

[Claims] A substrate, a synthetic resin foam, and an outer skin sheet are laminated so that the synthetic resin foam is sandwiched, and then desired portions of the outer skin sheet are heat-sealed to the substrate to form desired areas on the surface of the outer skin sheet. In the method for manufacturing an automobile interior material, the portion of the outer skin sheet on the substrate is heat-sealed to the outer skin sheet in the method of manufacturing an automobile interior material, in which a folded portion of the outer skin sheet to the back surface of the substrate is fixed to an end portion of the back surface of the substrate. Apply hot melt adhesive powder through a screen with a pattern cut out, and at the same time electrostatically apply the hot melt adhesive powder to the edge of the back side of the substrate, and then apply the applied hot melt adhesive powder to the edge of the back surface of the substrate. 1. A method of manufacturing an interior material for an automobile, characterized in that a substrate is formed by heat melting and fixing on the substrate.