JPH0655294B2 - How to apply a metallic grain pattern - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a coating method for applying a metallic embossed pattern to a surface to be coated such as a vehicle body.

(Prior Art) Conventionally, for example, in the case of coating a metallic metallic grain pattern on a vehicle body, as shown in FIG.
An undercoating paint is applied to the surface 1 to be painted of the vehicle body and baked to form a flat paint coating film 11, and the paint film 11 is provided with textured portions 12A to 12A in a pattern.
This is baked to form 12 textured patterns, then 20μ
Of the aluminum foil 13 to 13 of the above is applied to the flat coating film and the embossed part on the flat coating film and the embossed part, and after drying, the clear paint 15 is applied unevenly and baked to give a predetermined silver metallic color embossed product. Pattern painting part 16
Is formed.

However, the conventional metallic color grain pattern has a large number of coating steps and requires baking treatment three times, which is a complicated process and a problem.

(Problems to be Solved by the Invention) The present invention is intended to solve the above-mentioned conventional problems, and is a metallic color which is obtained by reducing the number of coating steps and baking treatment of a paint and has a good finish. It is to provide a coating method for a grain pattern.

(Means for Solving the Problems) In order to solve the above problems, the means of the present invention is to apply fine metallic particles on the surface to be coated when the surface to be coated such as a vehicle body is coated with a metallic color shibo pattern. Forming a flat coating film with a paint of a predetermined color containing a strip-shaped metal foil, and then forming a grain pattern on the coating film with a paint of the same color as the paint containing a fine flaky metal foil, After drying the embossed pattern, a coating film of a clear paint containing no metal foil is formed on the embossed pattern and the embossed pattern in a concavo-convex shape so that the embossed portions of the embossed pattern are peaks, and subjected to baking treatment. It was done like this.

The painted surface is applied not only to the vehicle body but also to exterior parts such as a top cover and an air spoiler attached to the outer surface of the vehicle. The metal foil is preferably in the form of fine flakes having a diameter of 10 μm or less, such as the metal foil 3 having an outer diameter 1 of 10 μm and m of 7 μm shown by a solid line in FIG. In addition,
As the conventional metal foil, for example, a metal foil 3A having an outer diameter lo of 20 μm and a mo of 15 μm shown in phantom in FIG. 1 has a diameter of about 20 μm. In the present invention, the paint to which the metal foil is added (metallic paint) contains a predetermined color pigment. The mixing amount of the metal foil is the same as in the conventional case. If the mixing amount of the metal foil is small, the metallic luster after baking will be weak.

(Operation) In the present invention, the flat coating film along the surface to be coated of the automobile body and the embossed portion formed on the coating film are formed of the same color paint containing fine flaky metal foil. A clear coating film made of a transparent clear coating material containing no metal foil is formed on the textured portion and the exposed surface of the flat coating film. The light hitting the coated surface is reflected by the coating film of the stock and the fine pieces of the metal foil in the embossed portion through the clear coating film, and exhibits a metallic luster. The clear coating film on the outer surface gives a textured pattern without unevenness.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

First, as shown in FIG. 1, the painted surface 1 of an automobile body
A metallic paint is applied to and dried to form a flat paint film 2. The metallic paint contains, as paint components, a color pigment and metal foils 3 to 3 such as fine flaky aluminum having an outer diameter of 10 μm or less.

Next, as shown in FIGS. 2 and 3, a grain pattern 4 is formed on the paint coating film 2 with the same metallic paint. The texture pattern 4 is formed by appropriate means. After the embossed pattern 4 is dried, the metal foils 3 to 3 and the highly transparent clear paint containing no pigment on the exposed surface of the embossed parts 4A to 4A of the embossed pattern 4 and the flat paint coating film 2 are shown in FIG. As shown in the figure, the clear coating film 5 is coated in an uneven shape by an appropriate means so that each embossed portion 4A of the embossed pattern becomes a mountain portion protruding upward.
Is formed.

Then, after the coating is finished, baking is performed at 80 ° C. for 30 minutes in a baking furnace to obtain an automobile body in which the surface 1 to be coated of the automobile body is coated with the silver metallic color coating portion 6. The finish of the metallic color coating portion 6 of this automobile body was the same as that obtained by the conventional treatment process, and no difference was observed in the adhesion of the coating film and the metallic ray reflection property.

(Effect of the Invention) As described above, according to the present invention, a flat coating film is formed on a surface to be coated with a coating material containing a metal foil, and a fine flaky metal foil is contained on the coating film. A grain pattern is formed with a paint of the same color as the above-mentioned paint, and a clear coating that does not contain a metal foil on the flat coating film and grain pattern is applied in an uneven shape so that the grain portion of the grain pattern becomes a mountain portion. Therefore, it can be implemented with three coating processes and one baking process.
Compared to the case where the coating process is performed four times and the baking process is performed three times, the number of process steps is reduced and it is easier to implement. The coated surface formed by the present invention has a good finish with a metallic grain pattern equivalent to that of the conventional case, and the finishability is not hindered.

[Brief description of drawings]

1 to 4 relate to the present invention, FIG. 1 is an explanatory view showing the size of a metal foil mixed with a paint, FIG. 2 is a cross-sectional view of a coating film having a grain pattern, FIG. FIG. 3 is an enlarged cross-sectional view of the embossed portion, and FIG. 4 is an explanatory view of the coating film structure after baking. FIG. 5 is an explanatory view of a conventional coating film structure. 1 ... Painted surface, 2 ... Paint coating 3 ... Metal foil, 4 ... Texture pattern 4A ... Texture area, 5 ... Clear coating 6 ... Metallic color coating area

Claims (1)

[Claims] 1. A flat coating film is formed on a surface to be coated of a vehicle body or the like with a metallic color embossed pattern by using a coating material of a predetermined color containing fine flaky metal foil. Then, a wrinkle pattern is formed on this coating film with a paint of the same color system as that of the above-mentioned paint containing a metal foil in the form of fine particles, and after the wrinkle pattern is dried, a metal foil is formed on the coating film and the wrinkle pattern. A coating method of a metallic color embossed pattern, characterized by forming a coating film of clear paint that does not contain the above in an uneven shape so that the embossed parts of the embossed pattern become peaks, and baking.