Process for coating of engine cylinder body

Abstract

A process for coating of an engine cylinder body comprises the steps of first cleaning the surface of the engine cylinder body and then spraying primer and finish paint; performing microoxidation after the finish paint is sprayed; after the microoxidation, spraying a layer of mixture formed by evenly mixing the finish paint and finish varnish, wherein the finish paint in the mixture can eliminate defects on the surface of the finish paint sprayed in the preceding step; and performing drying after the drying. According to the process, a coating high in quality can be formed on the surface of the engine cylinder body, and the oxidation resistance of the coating can be improved by microoxidation of the finish paint; by spraying the mixture of the finish paint and the finish varnish, the defects on the surface of the finish paint are effectively covered, and an original effect of the finish paint layer is not affected. The one-time pass rate of spraying is greatly improved, and thus the coating cost is effectively reduced. The process further has the advantages of being simple, easy to operate and low in cost.

Description

technical field [0001] The invention relates to the field of coating, in particular to an engine cylinder body coating process. Background technique [0002] Reducing the cost of painting and improving the quality of painting has always been the theme of the development of painting technology. In the current assembly line production, the passing rate of one-time painting off-line has always been an important issue that plagues production enterprises. In the construction of the painting line, after the topcoat is sprayed, there are pits, bubbles, sweep marks and other defects on the surface of the topcoat, and the oxidation resistance of the topcoat coating is not enough. After spraying the finish varnish and baking it off-line, because of the coating defects, that is, the defects on the surface of the topcoat exist under the surface finish varnish layer, the defects cannot be eliminated by polishing and other rework methods, and the surface quality requirements cannot be me...

AI Technical Summary

Problems solved by technology

In the construction of the painting line, after spraying the topcoat, there are pits, bubbles, sweep marks and other defects on the surface of the topcoat, and the oxidation resistance of the topcoat is not enough

After spraying the finish varnish and baking it off-line, because of the coating defects, that is, the defects on the surface of the topcoat exist under the surface finish varnish layer, the defects cannot be eliminated by polishing and other rework methods, and the surface quality requirements cannot be met, so it needs to be reworked. Rework greatly reduces production efficiency and increases production costs

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