JPS5941089Y2 - Molding - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to molding, and particularly to the material forming the molding.

Generally, an automobile 1 has two side panels 2 as shown in FIG.
A long molding 4 is attached to the front and rear bumpers 3 and the like for decoration and protection purposes.

As shown in Figure 2, conomolding is partially At
A decorative thin-walled member 5 (hereinafter simply referred to as a film) made by laminating a sheet of PvC or the like on the back of a transparent film deposited with a metal such as evaporated metal is adhered thereon. It is a long body, and pressure-sensitive double-sided adhesive tape 8
Deposited by.

Conventionally, the above-mentioned molding is made of non-foamed resin such as PvC, but when the cross-sectional shape of the molding becomes large, the weight increases and a large negative pressure due to weight is applied to the pressure-sensitive double-sided adhesive tape 8. This may cause the tape to peel off, and since non-foamed resin is expensive, the cost of the molding itself increases.

On the other hand, in order to eliminate the above-mentioned drawbacks, it is also conceivable to form a molding using a resin made by foaming PvC or the like.

This makes it possible to achieve weight reduction, but on the other hand, the beauty of the surface is lost due to the generation of air bubbles on the surface, and even though it is theoretically a closed cell foam, in reality it easily absorbs moisture and moisture. Since air bubbles are also generated on the bottom surface, the adhesive strength of the di-tape 8, which has a small practical contact area with the pressure-sensitive double-sided adhesive tape 8, is reduced. The adhesive strength between the parts 5 and 5 also decreases, and the thin part I breaks off during extrusion molding, and it becomes difficult to mold it into an accurate shape as shown in Figure 2, resulting in a loss of marketability. There are drawbacks.

Therefore, the present invention is intended to eliminate the above-mentioned drawbacks, and will be described in detail below using examples.

FIG. 3 is a cross-sectional perspective view of a main part showing an embodiment of the molding according to the present invention. In the figure, the molding 4 has a rectangular cross-section having a stepped portion 9 and a thin overhanging portion 10 protruding from the bottom on both sides. A film 11 is attached to the stepped portion 9, and the pressure-sensitive double-sided adhesive tape 12 is attached to the bottom surface to be attached to the panel 2 of an automobile.

This molding 4 is a foamed resin 1 with a specific gravity of about 0.8.
3, and a thin non-foamed resin 14 surrounding this resin 13 and having a specific gravity of about 1.35.

In this case, the entire projecting portion 10 is formed of non-foamed resin.

Then, one end of the film 11 in the width direction maintains a flat state and penetrates into the corner of the stepped portion 9, and the other end maintains a flat state and penetrates into the corner of the stepped portion 15 obtained by the overhanging portion 10, Both penetrating tips 16 are located only within the non-foamed resin 14 and do not reach the foamed resin 13.

Here, the foamed resin 13, non-foamed resin 14, and film 11 are simultaneously extruded using the same extrusion molding machine.

The resins 13 and 14 are the same resin such as PVC in order to obtain strong bonding force between the two after extrusion molding.

Of course, the resin 13 is subjected to foaming treatment before extrusion molding.

According to the above configuration, the lightweight foamed resin 13 occupies most of the molding, making the entire molding lightweight, but since the outer skin is made of non-foamed resin, the pressure-sensitive double-sided adhesive tape 12 will not peel off easily. , the cost will be lower.

In addition, since the outer surface is made of non-foamed resin 14, gloss can be obtained and an excellent appearance can be achieved. 14, so it does not absorb moisture or water,
Oda pressure-sensitive double-sided adhesive tape 12 and Tedra film 11
Since the substantial contact area with the molding 4 is increased, these members are not easily peeled off from the molding 4, and the non-foamed resin 14
Since it is highly workable, it has an excellent appearance without the occurrence of discontinuous parts in the overhanging part 10 and the whole, and can also reduce the shrinkage rate and prevent peeling at both ends of the molding due to warping of the molding due to long-term use. .

! In addition, since the penetration tip 16 of the film 110 is prevented from reaching the foamed resin 13 and the non-foamed resin 14 is continuous, it is possible to solve the problem of the resin 14 separating at the penetration point of the film 11 and peeling off from the resin. .

In addition, since both ends of the film 11 remain flat and penetrate only into the non-foamed resin 14, the ends may be deformed to return to their original shape during extrusion molding and over time. Therefore, the end portion can be stably integrated with the non-foamed resin 14.

FIG. 4 is a cross-sectional perspective view of main parts showing another embodiment of the molding according to the present invention, and the same parts as in FIG. 3 are designated by the same reference numerals.

In the figure, reference numeral 17 indicates a hollow portion provided in the foamed resin 13, which allows the molding 4 to be further reduced in weight.

Further, reference numeral 18 denotes a thick portion made by thickening a portion of the non-foamed resin corresponding to the penetrating tip 16 of the film 11, thereby making it possible to further increase the strength of the non-foamed resin 14.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing how the molding is installed, Fig. 2 is a cross-sectional perspective view of a main part showing an example of a conventional molding, and Figs. 3 and 4 are main parts showing an embodiment of the molding according to the present invention. It is a cross-sectional perspective view. 9...Stepped portion, 10...Protruded portion, 1
1... Film, 13... Foamed resin,
14...Non-foamed resin.

Claims (3)

[Scope of utility model registration request] (1) Cover the entire outer periphery of the foamed resin with a non-foamed resin layer, cover the surface of the non-foamed resin layer with a decorative thin-walled member, and foam the ends of the decorative thin-walled member while keeping them in a substantially flat state. A molding characterized by penetrating a non-foamed resin layer at a midway point 1 so as not to reach the resin. (2) The molding according to claim 1, which is a registered utility model, in which the thickness of the non-foamed resin corresponding to the penetrating end of the decorative thin member is thicker than other parts. (3) The molding according to claim 1, which uses a synthetic resin film exhibiting metallic luster as a decorative thin member.