A method for repairing shrinkage cavities in car topcoat

Abstract

The invention relates to a method for repairing the finish paint defects of a car, in particular to a method for repairing a finish paint shrinkage cavity of the car, which comprises the steps that: a. the shrinkage cavity is cleaned; b. varnish is injected into and fully fills a concave hole of the shrinkage cavity; c. the shrinkage cavity is dried and cured; d. after a paint film is cured, the shrinkage cavity is ground by sandpaper; and e. the shrinkage cavity is polished. Because the scheme is adopted, pits of the shrinkage cavity are fully eliminated, the repaired shrinkage cavity appears the color of the original paint which is consistent with that of the paint of other parts due to the transparency of the varnish, so that color difference is avoided, the appearance effect of the finish paint is not affected, the repairing procedures are simpler, the requirement on the level of an operator is not high, manpower and material cost is saved, and the working efficiency is improved.

Description

technical field [0001] The invention relates to a method for repairing coating defects of car top paint, in particular to a method for repairing shrinkage cavities of car top paint. Background technique [0002] Automotive topcoats are decorative and protective coatings with high requirements on appearance, but there are many factors affecting paint construction. It is inevitable that there will be defects such as "shrinkage cavity" in the paint film caused by cleanliness or local pollution, which will affect the appearance of the paint surface, and even affect the appearance of the paint surface. Surface anti-corrosion effect; therefore, "shrinkage cavity" must be repaired. At present, the "shrinkage cavity" treatment method of the topcoat is to smooth the paint film around the "shrinkage cavity" to the color paint layer. In order to avoid paint mist splashing to other normal paint film areas during repair, it is necessary to cover the area outside the repair, using a spray...

AI Technical Summary

Problems solved by technology

[0002] Automotive topcoat is a decorative and protective coating with high requirements on appearance, but there are many factors affecting paint construction, and it is inevitable that there will be disadvantages such as "shrinkage cavity" of the paint film caused by cleanliness or local pollution, which will affect the appearance of the paint surface, and even affect the appearance of the paint surface. Surface anti-corrosion effect; therefore "shrinkage cavities" must be repaired

At present, the "shrinkage cavity" treatment method of the topcoat is to smooth the paint film around the "shrinkage cavity" to the color paint layer. In order to avoid paint mist splashing to other normal paint film areas during repair, it is necessary to cover the area outside the repair, using a spray gun, etc. Spraying tools are partially sprayed, and then baked and modified, which is not only time-consuming and labor-intensive, but also easily produces color difference. It requires high technical level of repair personnel, increases costs and reduces work efficiency.