JPS62156913A - Molding method for interior part for vehicle - Google Patents

Abstract

PURPOSE:To obtain an interior part whose quality is favorable without deforming a hollow member under pressure applicable at the time of foaming of resin performing monolithic molding with foaming resin, by setting up a sealed hollow member or a hollow member whose inside is filled with a pressurizing fluid within a molding tool. CONSTITUTION:A hollow member 3 is set up between a top force 1 and bottom force 2. The hollow member 3 not having an opening part is used as an air conditioning duct and radio case. Then a cavity 5 is formed by joining the top and bottom forces 1, 2 to each other, the inside of the cavity 5 is filled with a foaming material and a resin foam 6 is molded unitarily on the circumference of the hollow member 3 by heating and foaming the foaming material. As resin with which the inside of the cavity 5 is filled, any one is available without limiting to a soft or hard one such as polypropylene, polyurethane or styrol. When monolithic molding has been performed, a molded article is taken out of the top and bottom forces 1, 2 and an opening is formed on a necessary part of the hollow member 3.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for molding interior parts such as vehicle instrument panels.

(Prior art) In general, interior parts such as instrument panels and door linings are made by attaching separately molded resin foam to a plate-shaped foundation, and air conditioning ducts, radio cases, etc. are also molded separately. I plan on installing it later.

However, this would complicate the manufacturing process and require the preparation of a large number of molds, so the applicant has developed an interior product in which a resin foam is directly installed integrally on the outside of a hollow body such as an air conditioning duct. Proposed.

(Problems to be Solved by the Invention) In order to integrally provide the resin foam on the outside of the hollow body as described above, as shown in FIG.
After setting the hollow body (103) in the cavity (102) formed by the cavity (102)
The inside of the hollow body (103) is filled with foam material (104), the foam material is foamed at a predetermined temperature, and a resin foam is integrally molded on the outside of the hollow body (103). Since the foam material is used as it is, there is a risk that a part of the hollow body (103) may be deformed by the pressure generated when the foam material is foamed, as shown in FIG.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides that after setting a hollow body in a sealed state or a hollow body whose opening coincides with a pressurized fluid passage in a mold, The mold is filled with foamed resin material and integrally molded.

(Function) Since a sealed hollow body or a hollow body whose inside is filled with pressurized fluid is set in a mold and integrally molded with foamed resin, even if the foaming pressure during molding is applied to the hollow body. , the hollow body is not deformed by the internal pressure of the hollow body.

(Example) Embodiments of the present invention will be described below with reference to the accompanying drawings.

Figure 1 is a cross-sectional view of the mold (mold) before molding, Figure 2
The figure is a sectional view of the mold during molding, and FIG. 3 is a partially enlarged view of FIG. 2.

First, as shown in Fig. 1, an upper mold (1) and a lower mold (2) are prepared.
A hollow body (3) is set in between. Here, it is assumed that the hollow body (3) does not have an opening, and that the hollow body (3) is used as an air conditioning duct or a radio case.

Next, as shown in FIG. 2, upper and lower molds (1) are formed.

(2) are combined to form a cavity (5), the cavity (5) is filled with a foaming material, and the resin foam (6) is integrally molded around the hollow body (3) by heating and foaming. Here, the resin to be filled into the cavity (5) may be soft resin such as polypropylene, polyurethane, or styrene resin.
It is not limited to hard and is arbitrary.

In this way, the hollow body (3) and resin foam (6) are molded (
If it is integrally molded in 1) and (2), then mold (1).

The molded product is taken out from (2) and openings are formed in necessary parts of the hollow body (3) so that the hollow body (3) can be used as a duct, a case, etc.

FIG. 4 is a sectional view showing another embodiment, FIG. 5 is a perspective view of a molded product molded by a method according to another embodiment, and FIG. 6 is a sectional view taken along line A-A in FIG. 5. In the embodiment, an opening (3a) is formed in a part of the hollow body (3), and a through hole (1a) for pressurized fluid such as pressurized air is formed in the mold (1) in advance. When the hollow body (3) is set between the molds (1) and (2), the opening (3a) should be aligned with the through hole (1a). When the setting is completed, the cavity (5) is filled with foam material, and pressurized fluid is supplied into the hollow body (3) through the through hole (1a) and the opening (3a) to The foam material is heated and foamed while the internal pressure of the body (3) is increased to form a hollow body (3) as shown in FIGS. 5 and 6.
) is obtained, in which a resin foam (8) is integrally molded around the resin foam (8).

Since this molded product has an opening (3a) formed in advance, this opening (3a) can be used as is for use as a case or the like without any post-processing.

(Effects of the Invention) As explained above, according to the present invention, when integrally molding a resin foam and a hollow body that becomes an internal part or an accessory part of an interior component such as a vehicle instrument panel, the hollow body is sealed. Since the hollow body is molded in a state or in a state in which the inside is filled with pressurized fluid, the hollow body is not deformed by the pressure when the resin is foamed, and an interior component of good quality can be obtained.

In addition, the manufacturing process is greatly simplified compared to the conventional method, and only one type of mold is required.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing the hollow body set in the mold, Fig. 2 is a cross-sectional view showing the molded state, Fig. 3 is an enlarged view of the main part of Fig. 2, and Fig. 4 shows another embodiment. 5 is a perspective view of a molded product obtained by the method shown in FIG. 4, FIG. 6 is a sectional view taken along line A-A in FIG. 5, and FIG. 7 is a hollow body in a sealed state. FIG. 3 is a cross-sectional view of a main part of a molded state that would be expected if the In the drawings, (1) and (2) are molds, (3) is a hollow body, (5) is a cavity, and (8) is a resin foam. March 7, 1986 1. Indication of the case Japanese Patent Application No. 60-298663 2, Name of the invention Method for molding vehicle interior parts 3, Person making the amendment Relationship to the case Patent applicant (532) Honda Motor Co., Ltd. 4, Agent Drawings

Claims (2)

[Claims] (1) Set the sealed hollow body in a mold, then fill the mold with a foaming material, foam the foaming material in the mold to integrally mold a resin foam on the outside of the hollow body, and then remove the mold from the mold. A method for molding interior parts for a vehicle, characterized in that a molded product is taken out and an opening is formed in a hollow body. (2) Set the hollow body in the mold so that the opening formed in the hollow body matches the fluid passage hole formed in the mold,
Next, filling the mold with a foaming material while supplying pressurized fluid into the hollow body through the through holes and openings, and foaming the foaming material in the mold to integrally mold a resin foam on the outside of the hollow body,
A method for molding vehicle interior parts, characterized in that the molded product is removed from the mold after this step.