JPH0556247B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for manufacturing a molding for a vehicle, and particularly to a molding for a vehicle suitable for manufacturing a weather strip belt molding to be attached to a vehicle door. This relates to a manufacturing method.

[Conventional technology]

Figure 6 is a perspective view of the vehicle, Figure 7 is a perspective view of the weather strip belt molding, and Figure 8A.
7 is a sectional view taken along the line AA, and B is a sectional view taken along the line BB in FIG. In the figure, 1 is a vehicle body, and a weather strip belt molding 4 on which a window glass 3 slides is attached to the upper edge of a door 2. The molding 4 has a draining lip 7 integrally extending to one side from a resin part 6 covering a metal plate profile 5 having a substantially U-shape with an opening at the bottom, and an end cap 8 formed at the end. There is. This molding 4 has a notch 10 formed in the tip 9 to prevent interference with door mirrors, etc., or a band-shaped protrusion in order to match the tip 9 with the vehicle body panel, or to diversify the decoration. There are some cases in which the cross-sectional shape of the tip portion 9 changes, such as by widening the surface bright portion 11 consisting of a portion at the tip portion 9.

In the conventional manufacturing method of this type of molding, a profiled material 5 made by roll-forming a metal plate is supplied to an extrusion mold, and a main body part 12 having a resin part 6 and a lip 7 formed thereon by extrusion is shaped into a cross-sectional shape. There is a method of joining different tip portions 9.

[Problem that the invention seeks to solve]

However, in such a conventional molding manufacturing method, there was a problem that a joining line was formed between the main body part 12 and the tip part 9 of the elongated molding 4, impairing the decorativeness. Further, when such moldings are manufactured by press working and injection molding, there is a problem in that the press mold and the injection mold become large and complicated.

The present invention is intended to solve the above-mentioned problems, and provides a method for manufacturing a molding for a vehicle that can manufacture a highly decorative molding with no visible joining lines using a relatively small and simple device. It is an object.

[Means for solving problems]

This invention includes the step of forming a base material having a constant cross-sectional shape by extrusion molding so as to have a resin portion covering the substrate and a core material made of a hard material having a bonding surface and a lip protruding from one side thereof; forming a decorative member having a predetermined decorative surface and a joint surface and whose cross-sectional shape changes along the longitudinal direction; joining the base material and the decorative member at the joint surface and inserting the decorative member into an injection mold; This method of manufacturing a molding for a vehicle includes a step of forming another resin part on a joint part and a part of a decorative member by injection molding.

[Effect]

In the manufacturing method of a molding for a vehicle of the present invention, a core material having a substrate and a joint surface is manufactured by metal plate roll molding or the like, and this is supplied to an extrusion mold to form a resin part and a lip covering the substrate. Extrusion molding is performed to form a base material with a constant cross-sectional shape. On the other hand, a decorative member having a decorative surface and a joint surface and whose cross-sectional shape changes along the longitudinal direction is formed by press-molding a metal plate or the like. Then, the base material and the decorative member are joined at their joint surfaces and inserted into an injection mold, and another resin part is formed at the joined part and a part of the decorative member by injection molding to complete the molding.

In this way, the molding whose cross-sectional shape changes in the longitudinal direction is divided vertically, and the parts whose cross-sectional shape does not change are formed by extrusion molding, and the parts whose cross-sectional shape changes are formed by press molding, etc. By joining and further forming a resin part by injection molding, a molding in which the joining line is not exposed can be manufactured with a simple device.

〔Example〕

Hereinafter, the present invention will be described with reference to embodiments shown in the drawings. Fig. 1 is a perspective view of a base material in an embodiment of the present invention, Fig. 2 shows a decorative member, A is a perspective view cut along the A-A plane in Fig. 7, and B is a perspective view cut along the B-B plane. Figure 3 shows the composite material, A is A-A.
B is a perspective view taken along plane B-B, and FIG. 4 is a sectional view taken along plane A-A showing the injection mold, and the same reference numerals as in FIGS. 6 to 8 are the same. or a significant portion.

As shown in FIG. 1, the method for manufacturing the molding 4 is as follows: First, a core material 21 having a substrate 21a and a bonding surface 21b and having an approximately L-shaped cross section is manufactured by roll molding of a metal plate, and then the core material 21 is molded into an extrusion mold. The resin portion 6a that covers both sides of the substrate 21a and the draining lip 7 that protrudes from one side thereof are extrusion-molded using a soft vinyl chloride resin or the like to form a base material 22 having a constant cross-sectional shape. This base material 22 is cut to a predetermined size, and the draining lip 7 of the tip 9 is cut to form a notch 10.

On the other hand, as shown in FIG. 2, a decorative member is formed by press forming a metal plate such as stainless steel, and has an approximately L-shaped cross section and a decorative surface 23a and a joint surface 23b, and whose cross-sectional shape changes along the longitudinal direction. 23
form. The decorative surface 23a of the decorative member 23 has
As shown in FIG. 2A, a surface bright portion 11 consisting of a band-shaped protrusion is formed in the main body portion 12;
The surface steel base 11 is formed so as to extend over the entire decorative surface 23a at the tip 9, as shown in FIG. 2B. Further, the end 9a of the tip portion 9 is formed into an inclined shape by drawing.

Next, as shown in FIG. 3, the base material 22 and the decorative member 23 are polymerized at their joint surfaces 21b and 23b, and joined by spot welding 24 or the like to form a composite material 25. Through hole 26
form. Then, as shown in FIG. 4, the composite material 25 is inserted into the injection mold 27 and the mold is clamped, and the molten resin is injected except for the surface bright part 11 of the decorative member 23, and the joint surfaces 21b, 23b and A resin portion 6b covering a part of the decorative surface 23a and an end cap 8 are formed to complete the molding 4. At this time, the resin portion 6b connects both sides of the through hole 26, increasing the adhesion.

The molding 4 thus obtained is the base material 22.
Since the joining portion between the decorative member 23 and the decorative member 23 is covered with the resin portion 6b, the joining line is not exposed, the decorativeness is enhanced, and the sealing is performed to prevent water from entering.

FIG. 5 is a sectional view showing a molding manufactured according to another example, in which the base material 22 and the decorative member 23 are joined by caulking 28. In addition, joining may be performed by riveting or other means.

In the above embodiment, a metal press-molded product was used as the decorative member 23, but it may also be injection molded from hard synthetic resin such as ABS resin, and its surface may be subjected to brightening treatment such as chrome plating or vacuum metallization, or colored coating. You may use the one you made.

〔Effect of the invention〕

According to this invention, injection molding is performed by joining a base material with a constant cross-sectional shape and a decorative member with a variable cross-sectional shape, so that the joining line is not visible and the decorative and sealing properties are high. As a result, it is possible to produce moldings with varying cross-sectional shapes using a simple device.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a base material in one embodiment of the present invention, FIG. 2 shows a decorative member, and A is A in FIG. 7.
- A perspective view cut along the A plane, B a perspective view cut along the B-B plane, Figure 3 shows a composite material, A a perspective view cut along the A-A plane, B a perspective view cut along the B-B plane. FIG. 4 is a cross-sectional view taken along A-A plane showing the injection mold, FIG. 5 is a cross-sectional view showing the molding of another embodiment, FIG. 6 is a perspective view of the vehicle, and FIG. A perspective view of the weather strip belt molding, FIG. 8A is a sectional view taken along line AA in FIG.
It is a sectional view of B. In each figure, the same reference numerals indicate the same or equivalent parts, 4 is the molding, 6, 6a, 6b are the resin parts, 7 is the draining lip, 11 is the surface brightening part, 21 is the core material, 21a is the substrate, 21b, 23b is a joint surface;
22 is a base material, 23 is a decorative member, 23a is a decorative surface,
25 is a composite material, and 27 is an injection mold.

Claims (1)

[Scope of Claims] 1. A base material having a constant cross-sectional shape is formed by extrusion molding so as to have a resin portion covering the substrate and a core material made of a hard material having a bonding surface and a lip protruding from one side thereof. a step of forming a decorative member having a predetermined decorative surface and a joint surface and whose cross-sectional shape changes along the longitudinal direction; and a step of joining the base material and the decorative member at the joint surface and molding the decorative member into an injection mold. A method for producing a molding for a vehicle, comprising the step of inserting the resin part and forming another resin part in the joint part and a part of the decorative member by injection molding. 2. The manufacturing method according to claim 1, wherein the core material is manufactured by roll forming a metal plate. 3. The manufacturing method according to claim 1 or 2, wherein the decorative member is manufactured by press molding of a metal plate or injection molding of a hard synthetic resin.