Spray paint is a method of dispersing paint into uniform and fine mist droplets with the help of air pressure through a spray gun and applying it to the surface of the object to be coated. It can be divided into air spraying, airless spraying and electrostatic spraying. In the process of painting, special attention should be paid to safety to avoid inhalation and skin contact. The composition of electrostatic powder spraying equipment is powder supply bucket (powder supply with compressed air), high-voltage electrostatic generator, electrostatic powder spraying gun. Powder spraying refers to a coating process in which corona discharge is used to make powder coatings adhere to the workpiece. . After powder spraying, after hot melting, curing and other steps, a coating film will be formed on the surface of the workpiece. Powder spraying uses the phenomenon of corona discharge to make the powder coating adsorb on the workpiece. The process of powder spraying is as follows: the powder spray gun is connected to the grounding of the negative electrode workpiece, the powder coating is fed into the spray gun by the powder supply system by means of compressed air gas, and a high voltage generated by a high-voltage electrostatic generator is added to the front end of the spray gun. Intensive charge, when the powder is sprayed from the gun nozzle, it forms a circuit to form charged paint particles, which are attracted to the workpiece with the opposite polarity under the action of electrostatic force. When it reaches a certain thickness, due to the electrostatic repulsion, the adsorption will not continue, so that the entire workpiece can obtain a powder coating of a certain thickness, and then the powder is melted, leveled and solidified by heat, that is, a hard surface is formed on the workpiece surface. coating.