JPH0136766B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing automotive interior materials such as instrument panels and door inner panels, and structural materials such as automotive sunshades, which are made of resin.

When manufacturing conventional automotive sunshields or various interior materials, glass fiber reinforced unsaturated polyester resin (hereinafter referred to as FRP) is used to ensure the rigidity of the product and also to stabilize each dimension. However, the glass fibers are partially exposed on the surface, resulting in a poor appearance.For this reason, patterns such as small recesses (texturing process) are added to the surface of FRP during mold molding, and FRP The surface of the urethane was hard, inflexible, and had very little shock absorption, so there was a problem in that the urethane had to be attached using an adhesive.

The present invention improves the above-mentioned drawbacks,
This is a method for producing sunshades and interior materials for automobiles that are made of FRP as a base material and have excellent appearance and shock absorption properties.

That is, cloth-like or chop-like glass fiber,
Sheet-like FRP impregnated with polyester resin
is inserted into a mold of a certain shape, heated and pressed.
A molded product made of FRP is made, then the mold is opened,
The molded product is molded by adding a liquid thermosetting urethane molding material onto the molded product and further performing heat molding.

Compared to conventional materials, sunshield materials or interior materials manufactured using this method have the following advantages: (1) The glass fibers protruding from the surface of the FRP are covered with the urethane raw material, so the surface is smooth and shock absorption is improved. (2) It eliminates the need for an adhesive process, which was previously required, and can shorten the manufacturing process.

The following is a detailed explanation of Figures 1 to 3 based on the examples.
This will be explained using figures.

1 is FRP mixed with 70% WET of polyester and inorganic filler (calcime carbonate) and 30% WET made of chop-shaped glass fibers, which is made into a sheet shape so that it can be easily molded with a mold. It consists of a mold 2 and a lower mold 3, and 4a and 4b are mold guides. This sheet-like FRP is placed in a mold and heated at about 150° C. for 2 to 3 minutes to form an FRRP molded body 5.

6 is a urethane raw material in which polyol and diisocyanate are mixed in a ratio of approximately 1:1 and diamine is added as a chain extender. After pouring this urethane raw material 6 onto the FRP molded body 5, it is further heated at 150°C in a mold. The molded article 7 of the present invention is manufactured by heating and pressurizing at a temperature of about 2 minutes.

Reference numeral 10 is an automobile sunshade manufactured by the method described above, 8 is an FRP structure, 9 is urethane integrated into the FRP, 8a and 8b are ribs for reinforcing the structure, and this sunshade 10
The size is approximately 850 x 750 mm, and the urethane interior surface 9a is flexible and extremely smooth. That is, when forming using a conventional adhesive, the reinforced part 8 of the FFD 8 is
A concave sink mark 12a is formed in the lower part of a, and the adhesive 12 and the urethane raw material 11 are also deposited in this concave part 1.
2a, a recess 11b is formed on the urethane surface as shown in the figure, but according to the method of the present invention, as shown in A, the recess 8c of the FRP 8 is also filled with urethane 9 by injection, and therefore the inner surface of the mold This smoothness directly becomes the smooth inner surface 9a of the molded body.

When molding a molded product with a concave surface such as Sunshade 10 for automobiles, the upper part is concave.
When FRP molding was performed and urethane was injected into the mold, a smooth surface with a good appearance was obtained.

However, when FRP molding was carried out with the concave state downward, and urethane was injected and molded, the injected urethane raw material was hardened by the heat of the mold, resulting in a ripple-like pattern. The bulge caused by the air remained, and the urethane surface became swollen.

When molding a molded product with such a concave surface, the molding is performed so that the surface is concave upward, and urethane is injected onto the formed FRP molded product to create automobile interior materials and structural materials with excellent appearance. Can be manufactured.

[Brief explanation of drawings]

FIG. 1 shows the manufacturing process according to the present invention.
A is a process diagram of FRP before pressing, B is a process diagram of FRP being pressed, C is a process diagram of opening the mold and adding urethane to the molded body, D is a press process diagram,
Process diagram of integrally molding FRP and urethane, Part 2
The figure is a perspective view of a sunshade manufactured by the method of the present invention, A in FIG. 3 is an enlarged view taken along the line A--A in FIG. 2, and B is an enlarged view taken along the line A-A according to the conventional method. 2, 3...Mold, 5...FRP, 6...Urethane raw material, 7...Integrated interior material, 10...Sunshade, 12...Adhesive.

Claims (1)

[Claims] 1 Glass fiber-reinforced unsaturated polyester resin, which is made by impregnating cloth-like or chop-like glass fibers with polyester resin, is heated and molded using a mold to create an FRP molded body with a concave surface on top, and then molded into a mold. A method for manufacturing automobile interior materials and structural materials, which comprises: opening the mold, and laminating and integrally molding a polyurethane resin on the upper surface of the FRP molded body held in a lower mold.