JPH0631244A - Method of repairing paint film containing dye - Google Patents

Abstract

PURPOSE:To provide a repairing method of a paint film containing a dye capable of minimizing the color difference between the periphery part where repair is not needed and the repairing part due to scars, etc. CONSTITUTION:In the case adhering substances 4 such as dusts, etc., adhere to a coating surface, a repair part of the paint film surface, in other words, a color clear layer 3, together with the adhering substances, 4 is locally abrased using a compact size abrasing apparatus 5 having an abrasing part with a small diameter to form a recessed part (abrased part) 31. A power paint 6 containing the same dye as the dye contained in the color clear layer 3 is injected in the recessed part 31 from an injection apparatus 7 and the power paint 6 packed in the recessed 31 is heated to melt once and then hardened (heat melted and hardened). The narrow range of only the repair part of the outer surface of the hardened power paint 6 is locally abrased by a compact polisher 8 and thus repairing is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing a coating film containing a dye, which is used for coating automobiles and the like and is used for obtaining a coating film having a deep and highly transparent feeling.

[0002]

2. Description of the Related Art Generally, the coating of automobiles and the like is aimed at protecting the vehicle body and improving durability, but in recent years, there has been a strong demand for improving the appearance quality (painting texture) appealing to the senses. ing. In order to improve the painting quality, it is necessary to strengthen the depth, transparency, and depth.As a painting method that gives a high-class feeling, after forming a color base layer using a pigment on top of the base layer, In a method of forming color clear layers having a white / black concealing film thickness of 100 μ or more in a layered manner, in order to suppress scattering on the outermost surface, a color clear layer containing a dye is wet-on-wet on a color base layer containing a pigment. It is known that a layer is applied and then a transparent clear layer is applied (see Japanese Utility Model Laid-Open No. 1-108726).

Conventionally, as shown in FIG. 2, when a clear layer a composed of a transparent clear layer and a color clear layer and a color base layer b are formed on the upper surface of an underlayer c, the coating film is scratched (a). Then, the clear layer a and the color base layer b including the scratches and their peripheral portions are ground until they reach the base layer c, the ground surface d is polished with sandpaper (b), and the ground surface d is covered with a sprayer g or the like. The color base layer e is applied, the clear layer f is applied on the upper surface of the color base layer e (c), and the repaired part and its peripheral part are polished by the polishing tool h to smooth the outer surface of the coating film (d) Repair Method is used.

[0004]

However, in the conventional method of repairing a coating film, as shown in FIG. 2D, since the polishing by the polishing machine h is performed in a wide range,
If the surface of the coating film is a curved surface, and especially if the curvature thereof changes, it is difficult to polish the entire surface to a uniform thickness, and it is easy to produce an excessively cut portion m. Since the color base layer e and the clear layer f are coated so as to cover, the film thickness increasing portion n composed of the clear layer a and the color base layer b and the color base layer e and the clear layer f is likely to be formed, and the excessively cut portion At m, the film thickness of the coating film becomes thin and the color of the coating film becomes lighter than that of the periphery, while in the film thickness increasing portion n, the film thickness of the coating film becomes thicker and the color of the coating film becomes darker than that of the periphery thereof. There was a problem.

An object of the present invention is to provide a method for repairing a coating film containing a dye capable of reducing a color difference between a peripheral portion which does not require repair and a repaired portion due to a scratch or the like.

[0006]

In order to achieve the above object, a method for repairing a coating film containing a dye of the present invention is a method for repairing a coating film having a layer containing at least a dye,
The part to be repaired in the coating film that needs repair is locally polished to form a sharpened part consisting of a recess having a minimum opening area and depth sufficient to remove scratches, etc. After the powder coating material containing the same dye as the contained dye is locally sprayed and filled, and the filled powder coating material is heated and melt-cured,
This is a film that is produced when a repair paint is applied by locally polishing (polishing) the repair part of the paint film so that the thickness of the paint film at the repair part of the paint film is made almost uniform with the thickness of the surrounding parts. Since it is possible to prevent the film thickness from increasing, it is only necessary to carry out local polishing only on the repaired part, it is possible to suppress excessive shaving due to polishing, and it is possible to suppress the color difference between the repaired part and its peripheral part. The color difference, which is the difference, can be reduced.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG.
A coating film comprising an underlayer 1, a color base layer 2 containing a pigment formed on the upper surface of the underlayer 1, and a color clear layer 3 containing a dye formed on the upper surface of the color base layer 2 to a thickness of 40 μm or more. In the case where the adhered matter 4 such as dust adheres to the surface of the coating film or is scratched (a), the surface of the coated film, that is, the color clear, is adhered together with the adhered matter 4 using a small polishing machine 5 having a small abrasive diameter. The repaired portion of the layer 3 is locally polished to form a smooth peripheral wall having a small opening area and a depth (in this embodiment, less than or equal to the thickness of the color clear layer 3) necessary for removing the deposit 4 or scratches. The recess 31 (grinding portion) provided is formed (b).

A powder coating material 6 containing the same dye as that contained in the color clear layer 3 is injected into the recess 31 from an injector 7 or is locally sprayed by a sprayer to obtain powder. The coating material 6 is filled (C), and the powder coating material 6 filled in the recess 31 is heated to be once melted and then cured (heat-melt curing) (D). The outer surface of the hardened powder coating material 6 is locally polished by a small polisher 8 in a narrow area of only the repaired portion (e), and the repair is completed.

With the above-described structure, the recess formed in the repaired portion is filled with the powder coating material and is heated and melt-cured to prevent an increase in the film thickness of the coating film which is caused when the repair coating material is applied. Therefore, only the local polishing (polishing) of the repaired part only needs to be performed. Polishing (polishing)
It is possible to suppress excessive shaving and reduce the color difference between the repaired portion and the peripheral portion.

[0010]

Since the present invention is constructed as described above, it has the following effects. By filling powder coating into the recess formed in the repaired part and heating and melt-curing it, it is possible to prevent an increase in the film thickness of the coating film that occurs when applying the repairing coating. Therefore, it is sufficient to carry out only polishing (polishing), and excessive shaving due to polishing (polishing) can be suppressed. Therefore, it is possible to reduce a color difference, which is a color difference between the repaired portion and the peripheral portion thereof.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a method for repairing a coating film containing a dye according to the present invention.

FIG. 2 is an explanatory diagram of a conventional coating film repairing method.

[Explanation of symbols]

1 Underlayer, 2 Color Base Layer, 3 Color Clear Layer, 4 Adhesion 5 Small Polisher, 6 Powder Coating, 7 Sprayer, 8 Small Polisher

Claims (1)

[Claims] 1. A coating-repairing site requiring repair is locally polished to form a sharpened portion, and a powder coating material containing a dye is locally sprayed to the sharpened portion, and the powder coating material is heated and melted. After being cured, the coating film repaired portion is locally polished to make the coating film thickness of the coating film repaired portion substantially uniform with the coating film thickness of the peripheral portion of the coating film containing a dye. Repair method.