Due to the exposed parts of the entire vehicle, automobile air intake grilles have the characteristics of being susceptible to moisture, heat, and cold. In order to reduce corrosion and fractures, surface care is one of the indispensable aspects of manufacturing and processing today. Common air intake grille surface treatments The main processes are: ① baking paint, ② spraying process, ③ medium light injection molding, ④ leather texture.

　　1. Metal surface treatment. Baking paint process: Baking paint is a brightly colored paint that is easy to clean and has good moisture-proof performance. Spraying process: Use a spray gun to spray uniform and fine mist droplets on the metal surface. There are two layers of paint, topcoat and protective paint. The specific process is: cleaning → spraying topcoat → drying → cooling → spraying protective paint → curing.

　　2. Surface treatment of engineering plastics. Injection molding: Injection molding air intake grille has a large temperature rise, good fluidity when hardness is high, high surface hardness, large temperature difference, high surface quality and surface strength of the product, omitting other surface processes, thus saving processing costs , energy and material costs. The process flow is to heat the mold before closing the mold, perform injection molding after the mold is closed, and then continue to heat the mold to make the material fluid. After the injection molding is completed, active cooling is performed to reduce cooling time and improve production efficiency. Skin texture: The skin texture treatment process can deal with defects on the product surface and reduce the defect rate of the air intake grille appearance. The surface treatment process can cause diffuse reflection on the surface of the product and eliminate visual fatigue. Surface oxidation method: Surface oxidation method is mainly divided into gas phase oxidation, liquid phase oxidation and electrochemical oxidation. Surface deposition methods can be divided into chemical vapor deposition (CVD), pyrolytic coating and whisker methods.

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