JPS6038194B2 - Integrated coating method for metal parts and synthetic resin parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of painting and adhesively fixing a metal member and a synthetic resin member.

Conventionally, in an automobile body 1 as shown in FIG. 1, the roof panel 3 and the front ender panel 5 are often press-molded separately and joined together, and in this case, the joining seam is treated to maintain tightness and airtightness. The following methods may be used from the viewpoint of appearance and appearance.

That is, as shown in FIG. 2, the end of the roof panel 3 made of metal parts and the rear fender panel 5 is bent toward the passenger compartment, and the two ends are overlapped and connected to the overlapping part 9 by a bushing or the like. groove 11 for attaching the resin molding 7.
After applying a sealant 13 to the seam of the overlapping part 9 in the groove 11, a final (top coat) coating is applied to the car body 1, and then a predetermined amount of adhesive 15 is put into the groove 11 to form a roof panel. 3 and the resin molding 7 of the same color as the paint color of the rear fender panel 5, and then apply the above adhesive 1.
It was fixed by 5.

However, with this conventional mounting method,
It is necessary to apply a sealant 13 to the joints of the overlapping parts 9 with the roof panel 3 and the rear fender panel 5, which is inefficient, and also requires a large number of resin moldings 7 to match the vehicle body color. There is a problem in that the number of parts is large and the number of parts management steps is increased.

Furthermore, in the case of the above-mentioned attachment method, the resin molding 7 is attached to the painted vehicle body, so there is a possibility that the painted surface may be scratched, and if it is scratched, it may cause rust. This was a problem as it caused the occurrence of This invention was created by focusing on the above-mentioned conventional problems, and includes bending the ends of the roof panel and rear fender panel toward the passenger compartment.
It has a structure in which the ends are overlapped and bonded to form a groove, and the resin is bonded to the resin through the thermosetting adhesive disposed in the groove.
After temporarily fixing the molding, the thermosetting adhesive is fused and cured during the car body painting process to fix the resin molding and seal the joint between the roof panel and the fender panel. That is.

The present invention will be explained below based on the drawings.

Note that the same components as those of the conventional example explained in FIGS. 1 and 2 are designated by the same reference numerals, and the explanation thereof will be omitted. Figure 3 shows
A first embodiment of the present invention is shown in which an automobile main body 1 made of a metal material and a resin molding 7 made of a heat-resistant resin material are adhesively fixed and painted in the same color.

3 is a metal roof panel, and 5 is a rear fender panel. The ends of both panel members 3 and 5 are bent toward the passenger compartment, and the ends are overlapped and connected by welding or the like at an overlapping part 9. A groove 11 having a U-shaped cross section is formed for attaching the resin molding 7.

The resin molding 7 is made of a heat-resistant resin material that can be painted, and has an anchor-like shape on its bottom that prevents the resin molding 7 from coming off when it is temporarily attached to a thermosetting adhesive 17, which will be described later. A protrusion 19 is provided.

Further, 21 indicates the paint applied to the resin molding 7, the roof panel 3, and the rear fender panel 5. Next, the procedure for attaching the resin molding 7 to the groove 11 of the vehicle body and painting it will be explained based on FIGS. 3a to 3c.

As shown in FIG. 3a, for example, the overlapping portion 9 between the roof panel 3, which has been coated with an undercoat, and the Yarfuender panel 5 is shown.
As shown in FIG. 3b, a predetermined amount of thermosetting adhesive 17 is applied to the groove portion 11 having the groove portion 11. As shown in FIG.

Then, the resin molding 7 having the protrusion 19 is placed in the groove 11 coated with the adhesive 17, and the protrusion 1
9 is buried in the adhesive 17 and temporarily fixed.

Further, the left and right ends of the resin molding 7 are in contact with the roof panel 3 and the rear fender panel 5, and the resin molding 7 is in contact with the roof panel 3, the rear fender panel 5, and the resin molding 7.
The surfaces of the two surfaces are arranged to be approximately the same plane.

From this state, paint 21 is sprayed on the surfaces of the roof panel 3, the 1' fender panel 5, and the resin molding 7 in the paint spraying process of intermediate coating, and then transferred to the drying process. .

By applying high-temperature drying heat in a drying oven during this drying process, the adhesive 17 applied to the groove 11 is cured, and the automobile body 1 and the resin molding 7 are integrally molded in the same color. This is a top coat, that is, a final coat. In the above case, the resin molding 7 is attached after the undercoating, but the thermosetting adhesive 17 and the resin molding 7 are similarly attached after the intermediate coating is applied, and then hardened by a drying process when the topcoat is applied. The same applies even if it is fixed.

In addition, since the adhesive 17 is applied before the final (top coat) painting, the adhesive 17 also fuses to the joint of the overlapping part 9 between the roof panel 3 and the fender panel 5.
When curing in step 7, it can also be used as a rust-prevention seal for the joint,
This eliminates the need for a rust-preventing sealant and its application process, which were conventionally required.

As described above, the present invention temporarily fixes the resin molding through a thermosetting adhesive applied to the connecting and overlapping part of the roof panel and fender panel, and cures the adhesive during the car body painting process. As a result, the following three effects can be achieved at the same time.

○} Since the adhesive is cured using the heat of the painting process, a separate heating process is not necessary.

(2) The adhesive not only serves to fix both members and the resin molding, but also serves as a watertight and airtight seal at the joint between the two members.

{3' Since the resin molding can also be painted on the car body at the same time, there is no need to prepare a molding in the same color as the car body.

In addition, conventionally, when attaching a resin part to a metal part, there was a possibility of damaging the painted surface of the metal part, but with this invention, after the resin part is attached, it can be painted in the same color in the same process. There is no damage to the painted surface, and the sense of quality can be improved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a car body in which molding is applied to the roof panel of the car body, Fig. 2 is an enlarged sectional view taken along the 0-Ro line in Fig. 1, and Fig. 3 is a first embodiment of the present invention. FIGS. 3a to 3c are sectional views showing the sequence of work steps in the first embodiment of the present invention. (Explanation of main symbols shown in the drawings), 3... Roof panel, 5... Rear view panel, 7...
Resin molding, 17, 17a...Adhesive. Figure 1 Figure 2 Figure 3 Figure 3 (a1 Figure 3 (b) Figure 3 [c'

Claims (1)

[Claims] 1. In a structure in which the ends of the roof panel and rear fender panel are bent toward the passenger compartment and both ends are overlapped and joined to form a groove, resin is applied to the groove through a thermosetting adhesive. After the molding is temporarily fixed, the thermosetting adhesive is fused and cured during the vehicle body painting process to fix the resin molding and seal the joint between the roof panel and the rear fender panel. A method for integrally painting metal parts and synthetic resin parts.