Pearl white paint spraying process for vehicle bumpers

Abstract

The invention relates to a spraying process for vehicle bumpers, in particular to a pearl white paint spraying process for vehicle bumpers. The process includes the steps of pre-treating, flame treatment, primer spraying, colored floating coat spraying, pearl paint spraying, varnish spraying, and baking. Colored floating coat and pearl paint are subjected to paint ratio adjustment, so that viscosity of the colored floating coat is increased. The development of special spraying process of pearl white paint enables a conventional common automatic spraying line to produce pearl white products, and production efficiency is improved. The film thickness, appearance and performance quality of the pearl white products fully meet the quality requirements of vehicle manufacturers. The spraying qualification rate of the pearl white products reaches 90%, and the target that the spraying qualification rate of commonly used colored paints is not smaller than 88% is achieved.

Description

technical field [0001] The invention relates to an automobile bumper spraying process, in particular to an automobile bumper pearl white spraying process. Background technique [0002] Pearl white is a special color, which needs to be sprayed according to the following standards: pre-treatment - flame treatment - primer spraying - 2 times of intermediate paint spraying - intermediate paint baking - grinding - Wipe - 1 time pearl paint spray - varnish spray - bake. The spraying process of commonly used color paints is: pretreatment - flame treatment - primer spraying - 2 times color paint spraying - varnish spraying - baking. [0003] It can be seen that the main differences are: (1) pearl white needs to be sprayed with two different color paints, while commonly used color paints only need to be sprayed with one color paint; (2) pearl white needs to be baked twice; but the conventional automatic coating line Generally, there is no paint baking furnace, and there is no sandi...

AI Technical Summary

Problems solved by technology

However, if one robot is used to spray a total of one time to reach the thickness of the paint film, the paint film on the surface of the product will be wetter, and the wet film leveling time is only 1 minute, and the orange peel effect of the paint film on the surface of all products is difficult to satisfy

[0005] The standard process is that after the primer paint has been dried, there will be no problem of pearl mica sheet settlement. If a robot is used to spray a total of 1 times to reach the thickness of the paint film, the wet film of the primer paint sprayed on the surface of the product will be very wet , and there is a kind of pearl mica flakes in the pearl paint that will be sprayed later. The pearl mica flakes are heavier than the wet film of the intermediate paint, and will settle into the wet film of the intermediate paint, causing the color of the product to fade and fail.

Images