JPH0220313B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for color matching an automobile body and plastic parts assembled to the body.

(Prior art) Conventionally, as a method for painting the body of an automobile,
For example, as disclosed in Japanese Patent Publication No. 52-63233, in order to prevent deterioration of polishing workability and deterioration of the quality of the top coat due to overspray mist after the intermediate coat on the body surface, the top coat is applied after the intermediate coat is applied. It is known to previously form an intermediate coating layer using a paint of the same color as the top coat.

(Problem to be Solved by the Invention) By the way, when plastic parts are assembled as exterior parts to the body of a car, due to the differences in the materials, even if painted with the same color paint, the effects of the material may not be affected. Therefore, a color difference occurs between the body and the parts. Therefore, in this case as well, in order to reduce the color difference between the body and the parts as much as possible and improve the appearance, this is applied to the entire body after the intermediate coat is applied and before the top coat is applied, as in the conventional example above. It is common practice to form an intermediate coating layer using a paint of the same color as the top coating of the component after the intermediate coating layer is dry. However, in that case, there was a problem in that a large amount of paint was required to coat the entire surface of the body, resulting in increased costs.

Therefore, the idea was to form the above-mentioned intermediate coating layer only on the periphery of the mating surface with the plastic parts of the body when the intermediate coating layer is dry, thereby reducing the amount of paint used and reducing costs. However,
In this case, although the color difference between the periphery of the mating surface and the plastic part is minimized, the boundary between the periphery of the mating surface and other parts of the body is distorted due to the difference in hiding power between the two. A problem occurs in which the image appears sharply.

The present invention has been made in view of the above, and its purpose is to form an intermediate coating layer only on the periphery of the mating surface with the plastic parts of the body after the intermediate coating of the body and before the top coating. At the same time, by forming this intermediate coating layer while the intermediate coating layer is still wet, the concealing property in the periphery of the mating surfaces is improved, and
By blurring the boundary between the peripheral area of the mating surface and other parts of the body, this prevents the influence of the body material from reaching the top coat layer, and the alignment between the body, the plastic parts assembled to the body, and the body. The object of the present invention is to reduce the color difference between the periphery of the surface and other parts as much as possible using a small amount of paint, thereby achieving both cost reduction and improvement in visual effects.

(Means for Solving the Problems) In order to achieve the above object, the solution of the present invention provides a method for color matching the body of an automobile and plastic parts assembled to the body. After painting, while the intermediate coat layer formed by this intermediate coat remains wet, a top coat layer is applied to the periphery of the mating surface with the plastic part by applying a top coat to the plastic part. A paint of the same color is applied to form a color intermediate coating layer. Thereafter, after a drying process, a top coat is applied to the entire surface of the body.

(Function) With the above configuration, in the present invention, by forming a color intermediate coat layer of the same color as the top coat layer of the plastic component around the mating surface of the body with the plastic component, the color intermediate coat layer is coated with the color intermediate coat layer. The film layer enhances the concealment of the area around the mating surfaces of the body, and prevents the influence of the material from reaching the top coat layer, so even if plastic parts are assembled to the body, the mating The color difference between the peripheral part of the surface and the plastic part can be made as small as possible even with a small amount of paint. In addition, since the color intermediate coating layer is applied and formed while the intermediate coating layer of the body is wet, the boundary between the peripheral area of the mating surface and other areas of the body is blurred.
The color difference between the two can be made as small as possible, and the color difference between the body and the plastic parts is alleviated by the interposition of the color intermediate coating layer, resulting in an overall good-looking exterior finish. .

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows an automobile M to be painted by the color matching method of the present invention. At the front end of a front body 1 of the automobile M, there is a soft face type front bumper 2 as a plastic part which is an exterior part of the automobile M. is assembled. This front bumper 2 is made of hard urethane, for example, molded into a predetermined shape using the reaction injecting mold (RIM) method, and its surface is coated with an undercoat with a thickness of 15 μm as shown in Figure 2. Layer 3, intermediate coating layer 4 having a thickness of 35 μm formed by intermediate coating, and top coating layer 5 formed by top coating coating having a thickness of 35 μm are sequentially laminated. The top coat layer 5 uses a paint of the same color as the top coat of the front body 1 (for example, Pure Red).

On the other hand, the front body 1 is formed by press-forming a steel plate, and the surface thereof has markings as shown in FIG.
An undercoat layer 6, an intermediate coat layer 7, a color intermediate coat layer 8, and a top coat layer 9 are each formed in a laminated manner. To explain the process, first, an undercoat layer 6 with a thickness of 15 μm is applied and formed for the purpose of rust prevention, and after drying the undercoat layer 6, the top coat is applied. An intermediate coating layer 7 having a thickness of 25 μm is applied by intermediate coating for the purpose of surface conditioning to improve the appearance of the substrate. Then, while this intermediate coating film layer 7 remains wet, it is applied to the front end of the front body 1, that is, the peripheral area A of the mating surface with the front bumper 2 (the area indicated by diagonal lines in the figure) of the front bumper 2. Film thickness with paint of the same color as top coat layer 5 (Pure Red)
A color intermediate coating film layer 8 of 10 μm is applied and formed. After a drying process, a top coat layer 9 with a thickness of 35 μm is applied to the entire surface of the front body 1, including the color intermediate coat layer 8, for the purpose of giving it a beautiful appearance and durability against the environment. Apply and form. The paint for this top coat is also the same color (pure red) as the top coat layer 5 of the front bumper 2. In addition, when forming the color intermediate coating film layer 8, the coating is applied so that the film thickness becomes gradually thinner toward the rear of the vehicle body.

The front body 1 painted in this manner has a color intermediate coating layer 8 of the same color as the top coating layer 5 of the bumper 2 applied to the peripheral area A of the mating surface with the front bumper 2. The color intermediate coating film layer 8 also improves the concealability of the peripheral area A of the mating surface of the front body 1, so that the front body 1
Since the influence of the material is suppressed from reaching the top coat layer 9, the color difference that occurs between the two mating surfaces can be made as small as possible with a small amount of paint. Moreover, the color intermediate coating film layer 8 is formed by coating while the intermediate coating film layer 7 is wet, and the border between the peripheral area A of the mating surface and other areas is blurred, so that both The apparent color difference can be made as small as possible. Therefore, the front body 1 and the front bumper 2 can be finished in a color-matched, good-looking appearance at a low cost.

In the above embodiment, the plastic part is the front bumper 2, but it is of course possible to use other plastic parts.

(Effects of the Invention) As explained above, according to the method of color matching between a body and parts of the present invention, after painting the intermediate coat of the body and before painting the top coat, the intermediate coat film layer remains wet. The color intermediate coating layer formed by applying the same color as the top coat layer of the plastic part around the mating surface of the body to the plastic part reduces the color difference between the mating surface of the body and the plastic part and the color difference between the body and the plastic part. Since the color difference between the periphery of the mating surface and other parts is minimized using a small amount of paint, it is possible to color match the body and plastic parts to create a good-looking appearance at low cost. can.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of an automobile showing the application area of the color intermediate coating layer;
FIG. 2 is a diagram showing the structure of the coating film on the bumper, and FIG. 3 is a diagram showing the structure of the coating film around the surface of the body mating with the bumper. 1...Front body, 2...Front bumper, 5...Top coat layer, 7...Intermediate coat layer,
8...Color intermediate coating layer, 9...Top coating layer, A...periphery of mating surface, M...automobile.

Claims (1)

[Claims] 1. A method for color matching the body of an automobile and plastic parts assembled to the body, in which after the intermediate coating of the body is applied, the intermediate coating film layer formed by the intermediate coating is wet. A paint of the same color as the top coat layer formed by the top coat of the plastic part was applied to the periphery of the mating surface with the above plastic part to form a color intermediate coat layer, and then a drying process was performed. A method for color matching a body and parts, which further comprises applying a top coat to the entire surface of the body.