Importance of powder spraying in auto industry
A car is a land vehicle. Its environment, climate, and road conditions are complex and changeable. For this, it needs good weather resistance, corrosion resistance, scratches, and stone resistance. That is, it should be exposed to sunlight, In the environment of rain, wind and sand impact, alternating dry and wet, cold and hot change, salt fog and acid rain corrosion, it has good light retention, color retention, no powdering, no shedding, no foam, no rust. In addition, the powder spraying in auto part industry layer covering the parts surface is a beautiful exterior of the car. For most users, the appearance is often the main factor that determines whether to buy a car. It can be seen that car coating should have two major protection and decoration The focus of the powder spraying process is to achieve the most effective protection and the best beautification effect on the car parts and other assemblies without the low pollution and low cost.
Auto parts powder spraying history
The powder spraying process in auto part industry has experienced more than 100 years of development. The automobile is a land-crossing tool. Its environment and operation methods range from simple brush painting in the original workshop to simple powder spraying to modern industrial powder spraying suitable for mass production. The operation content has also been developed from the initial painting of only a layer of paint on the surface of the workpiece to be protected to the first application of anti-rust paint on the surface of the workpiece and then spraying the topcoat to the current "pretreatment of paint-electrophoresis-intermediate coating- —Topcoat” etc.
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Auto parts powder spraying requirements
The powder coating in auto part industry includes at least four layers of electrophoretic primer, middle coat, color paint and varnish. For the welded parts that require sealing, PVC should also be applied between the electrocoat primer and the intermediate powder spraying. In order to meet the requirements of users for the increasingly high quality and diversified appearance of automobiles, the paint pretreatment and primer cathodic electrophoresis processes of automobile parts coatings have been fully automated, and the intermediate and top coating processes have achieved automatic electrostatic spraying and computer intelligence control. The texture of the car parts coating (appearance decoration, corrosion resistance, scratch resistance, etc.) has been significantly improved, and the parts warranty period has reached and exceeded the overall life of the car.