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Automotive sheet metal spraying line process flow

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With the application of sheet metal more and more widely, the design of sheet metal parts has become a very important part of the product development process. Mechanical engineers are skilled in the design skills of sheet metal parts, and the process flow of sheet metal spraying line is also important, especially in the automotive industry. Car painting refers to coating a layer of paint on the surface of the car to achieve the effect of protecting the car. Car painting is generally used paint. In the automobile factory, the frame and shell are welded, and the next process is painting. In the form of ordinary paint, metallic paint, pearl paint.

With the application of sheet metal more and more widely, the design of sheet metal parts has become a very important part of the product development process. Mechanical engineers are skilled in the design skills of sheet metal parts, and the process flow of sheet metal spraying line is also important, especially in the automotive industry.

Car painting refers to coating a layer of paint on the surface of the car to achieve the effect of protecting the car. Car painting is generally used paint. In the automobile factory, the frame and shell are welded, and the next process is painting. In the form of ordinary paint, metallic paint, pearl paint.

Automobile sheet metal spraying line process: putty scraping, polishing, painting, etc.

Usually, the automobile sheet metal spraying line is generally treated with primer first: sand marks and micropores are filled at the bottom of the workpiece to increase the adhesion of the lower coating and also indicate defects.

Treatment of intermediate primer: prepare a well-lubricated working surface for the topcoat, complete the last process of all primer work, increase the adhesion of the participating layer, and have a certain isolation effect to ensure the quality of the topcoat;

Topcoat spraying: the topcoat is divided into single-layer paint and multi-layer paint, which are solid color layer and decorative maintenance layer respectively.

Pre-treatment: remove the oil, dust and rust on the surface of the workpiece, and form a "phosphating layer" on the surface of the workpiece, which is corrosion-resistant and can increase the adhesion of the spraying layer. Oil removal, rust removal, phosphating and passivation. After pretreatment, the surface of the workpiece is free of oil, rust and dust, and a uniform and rough gray phosphating film that is not easy to rust is formed on the original silver shiny surface, which can prevent rust and increase the adhesion of the sprayed plastic layer.

High temperature curing: the powder coating on the surface of the workpiece is heated to the specified temperature and kept for the corresponding time to melt, level and solidify, so as to obtain the required surface effect of the workpiece. Push the sprayed workpiece into the curing furnace, heat it to a predetermined temperature, and keep it for a corresponding time; open the furnace, take it out, and cool it to get the finished product. After the paint surface is dried and cured, deal with the defects on it, deal with the traces of sandpaper, and deal with the traces of coarse wax to achieve a satisfactory gloss.