Active paint spraying method for patterned car door

Abstract

The invention discloses an active paint spraying method for a patterned car door, comprising the following steps of a, polishing the surface of a car body to ensure that the surface of the car body is smooth, clean, dust-free, rust-free and grease-free; b, carrying out flame treatment on the car door or carrying out surface treatment by using an active group capable of realizing corona discharge to improve the surface adsorption capacity of the car door until the thickness of a paint which can be adsorbed by the car door reaches a preset range; c, spraying the car door with a priming paint; d, then, grinding the dried car door to be flat, pasting a colored pattern onto the ground car door, spraying a color on the car door on which the pattern is pasted, keeping the distance between a spray gun and a sprayed surface at 10-15cm in the color spraying process, and keeping the spray gun and the surface of a sprayed object operating at a right angle; and e, spraying an intermediate coating paint, and continuously spraying the intermediate coating paint with a polyurethane finish varnish three times after drying for 0.5-1.5 h, wherein the intermediate coating paint is an aliphatic polyurethane glass flake paint. By using the active paint spraying method, the mechanical property of a coating on the surface of the car body is effectively improved.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a method for spraying an active paint on a door with a pattern. Background technique [0002] The existing method for spraying the surface of the automobile door includes surface treatments such as grinding, static removal and dust removal on the surface of the automobile door, and steps such as spraying primer, scraping putty, scraping dust and spraying color paint to the automobile door. Among them, scraping putty and scraping dust is to remove the uneven part of the surface of the car door by filling or overall treatment after the primer is sprayed on the surface of the car door, so that the surface of the car door is smooth and smooth, so that the paint can be effectively attached to the car. The surface of the car door ensures the appearance quality of the car door surface. [0003] But also there is the following problem: scraping putty and scraping dust all need worker's manual...

AI Technical Summary

Problems solved by technology

[0003] But also there is following problem: scraping putty and scraping dust all need worker's manual repeatedly putty or putty is coated on the automobile door surface, makes the step construction progress of scraping putty and scraping dust slow, causes the period of whole spraying operation to be longer, thereby The existing method of spraying the surface of automobile doors is only suitable for small-scale spraying treatment, and cannot meet the needs of the current large-scale production of automobiles