1. annealing: plastic is easy to form internal stress during molding and crack after coating. Annealing treatment or integral surface treatment can be selected to eliminate stress;
2.
Degreasing: the surface of plastic parts is often stained with oil stains, hand sweat and release agent, which will make the adhesion of the coating worse and the coating crack and blister. General plastic parts are cleaned by alcohol in Xiong Hui Electronic Oil Injection Factory, and then the residual lye on the surface of the workpiece should be thoroughly cleaned after chemical degreasing, and finally cleaned by pure water, dried or dried;
3.
Electrostatic precipitation: plastic products are insulators, and the surface resistance is generally1013Ω, which is easy to generate static electricity. After charging, it simply absorbs fine dust in the air and adheres to the surface;
4.
Spraying: the thickness of plastic coating is 15~20μm, and it usually takes 2~3 layers to finish. Dry for15min after the first spraying, and then spray for the second time.