JPS58112845A - Molding made of synthetic resin - Google Patents

Abstract

PURPOSE:To increase a shock-absorbing power in an extremely light weight by forming ribs in an internal space in one body and providing a metal molding on the external surface. CONSTITUTION:A molding main body 1 is provided with a flat part 10 in one lengthwise end and an internal space as a whole formed by means of a lengthwise ridge line 11, a side face 12, a slant face 13, and a side part 14. In this internal space, a lengthwise rib 15 and a widthwise rib 16 are respectively provided, and they are formed in one body with foamed synthetic resin forming a skin layer on the external surface. Metal moldings composed of a metal plate with an almost C-shaped profile provided on one part of the external surface of the molding main body 1 are exposed in their foot parts, and both brims of the C-shape are buried in the main body 1, and fixed by the effect of anchoring as the C shape is filled with the resin.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to synthetic resin moldings, particularly moldings for automobiles such as side moldings.

Synthetic resin moldings are used as moldings for automobiles. FIG. 1 is a side view showing a part of the vehicle body, and M is a molding (side molding) attached to the vehicle body B. FIG. molding m
The extrusion molded polyvinyl chloride resin is used by fixing it to the nominal panel of the vehicle body B with double-sided adhesive tape, adhesive, etc.

However, such conventional synthetic resin moldings use solid extrusion molded products, so as the size of the molding increases, the weight increases, which increases material costs and requires adhesive bonding. The problem of peeling occurred, and despite the demand for improved shock absorbing ability, the panel also deformed when subjected to external shock, and the restoring force was small.

This invention was made by focusing on such conventional problems, and in addition to integrally molding the foamed synthetic resin that forms the skin layer so as to form a lip in the internal space,
The purpose is to solve the above problems by providing a metal molding on the outer surface.

This invention includes a molding body that is injection-molded with a foamed synthetic resin that forms a skin layer on the outer surface so as to have a space inside, and a molding body that is integrally formed in the inner space of the molding body in the longitudinal direction and the width direction. The molding is made of synthetic resin and includes a molded lip and a metal molding having a C-shaped cross section on a part of the outer surface of the molding body.

Hereinafter, this invention will be explained based on the drawings. Fig. 2 is a perspective view showing a side molding according to an embodiment of the present invention, Fig. 6 is a front view, Fig. 4 is a partially cutaway perspective view seen from the back, and Fig. 5 is a vertical sectional view showing the installed state. It is.

In the drawings, reference numeral 1 denotes a molding body, which has a flat part 10 formed at one end in the longitudinal direction, and a ridge part 11, a side part 12, a slope part 16, and a side part 14 in the longitudinal direction.
The whole is formed to have an internal space, and a lip 15 is formed in the longitudinal direction of the internal space, and a lip 16 is formed in the width direction of the internal space, and these are integrally molded from a foamed synthetic resin that forms a skin layer on the outer surface. .

Reference numeral 2 denotes a full-area molding made of a metal plate having a C-shaped cross section and provided on a part of the outer surface of the molding body 1, with a base 20 exposed and both side edges 21 of the C-shape buried within the molding body 1. , the inside of the C-shape is filled with resin and fixed by the anchoring effect. 17 is the metal molding holding pin mark when inserting the metal molding 2 into the mold and molding; 18 is the metal molding 20
This is the buried portion at both ends. 6 is the molding body 1
This is the core material buried inside.

The above molding manufacturing method involves holding and positioning the entire area molding 2 in the mold with metal mold holding pins (none of which are shown), inserting a core material 6 such as an aluminum sheet in the same way, and inserting polyol into the mold. and isocyanate are injected into a mold to react and foam, resulting in RIM molding.
on Molding). The resin raw material injected into the mold foams due to the reaction, but since the mold surface is at a low temperature, foaming is suppressed in the areas that come into contact with it and a skin layer is formed, leaving only the inside as a foamed resin layer. Molded in one piece. The molding method does not have to be RIM molding; for example, foaming can be achieved by mixing a foaming agent with a normal injection resin and injecting it.In this case, too, since the mold is at a low temperature, there is no need for outside objects that come into contact with it. A skin layer is formed on the surface.

The molding manufactured in the above manner is attached to the vehicle body B by attaching double-sided adhesive tape 4 to the back side as shown in FIG. 5. Adhesives and other adhesives can also be used as the fixing means.

FIG. 6 is an exploded perspective view showing another embodiment, in which the molding body 1 and the metal molding 2 are separately manufactured and assembled. That is, a long hole 19 for attachment is provided in the molding main body 1, and the resin clip 5 is arranged such that both side edges 21 of the metal molding 2 are located on both sides thereof, and has a T-shaped head 50, a connecting portion 51, and a base 52. The head 50 of the metal molding 2 is passed through the elongated hole 19.
When inserted into the C-shaped interior of and rotated the base 52 by 90 degrees,
The head 50 is locked to both side edges 21, and the entire area molding 2 can be fixed to the molding body 1.

In the above description, the synthetic resin raw material is not particularly limited, and the material of the metal molding 2 is also not limited.

Further, the core material 6 is not necessarily required, and even if provided, the material is not limited. Further, the directions of the lips 15 and 16 do not need to be completely orthogonal, and a slight change in direction is possible. The present invention is applicable not only to side moldings but also to other vehicle moldings.

As explained above, according to the present invention, the foamed synthetic resin forming the skin layer is integrally molded to form a lip in the internal space, and the entire area molding is provided on the outer surface. You can get an effect like this.

■ The entire product is foamed and has a space inside, so it is extremely lightweight and has great shock absorption capacity.

■ Due to the lip and metal molding, it maintains strength against external forces.

■ Due to the inner space and lip, the restoring force against external forces is large.

■ There is no danger as both edges of the metal molding are buried.

■ Using a core material not only increases the strength, but also reduces the effect of lipping (occurrence of sink marks) on the surface of the molding body.

[Brief explanation of drawings]

Fig. 1 is a side view showing a part of a car body, Fig. 2 is a perspective view showing a side molding according to an embodiment of the present invention, Fig. 6 is a front view, and Fig. 4 is a part seen from the back side. FIG. 5 is a vertical sectional view showing an attached state, and FIG. 6 is an exploded perspective view showing another embodiment. In each figure, the same reference numerals indicate the same or equivalent parts, 1 is the molding body, 2 is the metal molding, 3 is the core material, 4 is the double-sided adhesive tape, 5 is the resin clip, 15.16
is a reply. Representative Patent Attorney Sei Yanagihara

Claims (1)

[Scope of Claims] (1) A molding body that is injection-molded with a foamed synthetic resin that forms a skin layer on the outer surface so as to have a space inside, and a molding body that has a space inside the molding body in the longitudinal direction. and a synthetic resin molding comprising a lip integrally molded in the width direction and a metal molding having a C-shaped cross section on a part of the outer surface of the molding body. (2) The metal molding is provided in the longitudinal direction;
The synthetic resin molding according to claim 1, wherein both ends thereof are embedded in the molding body. +31 Gold 174 The synthetic resin molding according to claim 1, wherein the molding is clipped to the molding body. (4) The synthetic resin molding according to claim 1 or 2, wherein the space of the metal molding is filled with foamed synthetic resin and fixed to the molding body. (5) The synthetic resin molding according to any one of claims 1 to 4, wherein a core material is embedded inside the outer surface of the molding body.