JPH0158066B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a core material for an automobile sun visor.

Conventionally, this type of sun visor has been manufactured by punching out a flat flexible synthetic resin foam sheet into a shape that matches the frame core, then applying or dotting adhesive or pasting double-sided adhesive tape on the frame core. The core material was formed by pasting it on the

However, the punching process and gluing process are time-consuming and costly, and if the foam sheet and the frame core are not aligned properly, the shape of the core material is unfavorable. Furthermore, since the foam sheet is punched,
Since the end of the sun visor has a pointed U-shaped cross section, the end has a disadvantage in that it has poor adhesion to a cover material such as vinyl chloride.

The object of the present invention is to eliminate such drawbacks and to obtain a core material for a sun visor that has good molding efficiency and a good shape.

That is, the present invention provides a core material for a sun visor, characterized in that a frame core is interposed between two flexible synthetic resin foam sheets, and a portion of the frame core close to the outer peripheral edge is heated and compression molded. This is a manufacturing method.

The present invention will be explained below with reference to the drawings.

FIG. 1 is a plan view of a core material for a sun visor obtained according to the present invention, and numeral 1 in the figure is a flexible synthetic resin foam sheet. Figure 2 is A of Figure 1.
-A′ cross-sectional view, 1′ and 1″ are flexible synthetic resin foam sheets, 2 is a frame core, and 3 is an adhesive sealing part compressed by more than 97%. 1′ and 1″ are upper and lower overlaps. The frame core 2 is compressed along the outer periphery of the frame core 2, and is adhesively sealed.
This end has a gentle roundness. The material and thickness of the flexible synthetic resin foam sheets 1' and 1'' are not particularly limited, and may be the same or different types.The foam sheets 1',
1'' is sufficient as long as it has a shock absorbing ability, and this is because not only does it feel good in actual use, but it also has the effect of softening the shock in the event of an accident caused by a sudden stop while driving, for example. Examples of the foam sheet include polyurethane, polyethylene,
Examples include foams such as polystyrene, polyvinyl acetate, polyvinyl alcohol, polyvinyl chloride, and polyethylene-vinyl acetate copolymer.

The frame core 2 has a structure as shown in FIGS. 3 and 4, and is made of a rigid hollow round bar of metal or plastic, with reference numeral 5 representing a support portion and reference numeral 6 representing a support rod. The frame core 2 does not necessarily have to be a hollow body, and its cross-sectional shape is not limited to a round shape either. A support rod 6 is inserted into the support portion 5 and fixed therein. The curved portion 4 of the frame core 2 on the outside of the support portion 5 is slightly inclined from the support portion 5 as shown in FIG. 4, and has a greater sunshading effect as a sun visor. FIG. 5 shows an example of the method for manufacturing the sun visor of the present invention. In the figure, 7' is the upper mold, 7'' is the lower mold, and the upright pressing walls 8', 8'' and the horizontal support part 9',
9'', and the pressing walls 8', 8'' are further formed with protrusions 10', 10'' for adhesive sealing.
The frame core 2 is inserted into the molds 7', 7'' at a predetermined position between the flexible synthetic resin foam sheets 1', 1'',
A laminated structure is formed, and the laminated structure is placed between an upper mold 7' and a lower mold 7'' and heated and compressed.The heating temperature is
80-220°C is preferred. In this case, the main body portion of the flexible synthetic resin foam sheets 1', 1'' can be compressed to 0 to 80% of the original thickness of the foam sheet, and the density increases as the compression rate changes. It is possible to easily obtain the desired quality such as shock absorption performance, flexibility performance, physical properties, and texture.
10" and is adhesively sealed by compression molding, and the compression rate of the foam in this area is over 97%. This not only allows the outer periphery of the sun visor to be easily sealed, but also At the same time, unnecessary parts can be cut out, eliminating the need for punching the foam that was previously required.In addition, the core material is fixed by sealing, which not only significantly improves shape retention, but also creates a rounded shape. Since it has a cross section of , the adhesion with the cover material such as vinyl chloride is improved.

As described above, according to the present invention, a core material for a sun visor can be obtained by a simple method of simply sandwiching a frame core between two flexible synthetic resin foam sheets and subjecting them to heat compression molding. This method does not require complicated manufacturing processes unlike conventional methods, and is highly effective in reducing manufacturing costs.

At the same time, it is possible to obtain a high-quality core material for a sun visor that has good shape retention and good adhesion to the cover material.

[Brief explanation of drawings]

FIG. 1 is a plan view of a sun visor core obtained by the present invention, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, FIG. 3 is a plan view of the frame core, and FIG. 4 is a frame core. FIG. 5 is an explanatory diagram of the present invention, and FIG. 6 is an explanatory diagram of a sun visor core material obtained by the embodiment of FIG. 5. 1, 1', 1''... Flexible synthetic resin foam sheet, 2... Frame core, 3... Adhesive sealing portion, 7'... Upper mold, 7''... Lower mold.

Claims (1)

[Claims] 1. A method for manufacturing a core material for a sun visor, which comprises interposing a frame core between two flexible synthetic resin foam sheets, and molding a portion of the frame core close to the outer periphery with heat compression adhesive. .