Talking about the use of powder electrostatic spraying in refrigerator painting

Electrostatic spraying mainly adopts the principle of high-voltage electrostatic corona electric field. The metal diversion cup on the Spray Gun head is connected to high-voltage negative electricity, and the workpiece to be coated is grounded to form a positive electrode. A strong electrostatic field is created between the Spray Gun and the workpiece. If the carrier gas (compressed air) sends the powder coating from the powder supply barrel to the diversion cup of the Spray Gun through the powder delivery pipe, it will cause dense charges around it, and the powder will be negatively charged. Under the influence of air, the powder is evenly adsorbed on the workpiece, and after heating, the powder is melted and solidified (or plasticized) to form a uniform, continuous, flat and smooth coating film. This paper mainly discusses the basic principle of powder electrostatic spraying process and the mechanism of powder coating curing and film formation, and expounds the application of powder electrostatic spraying technology in refrigerator coating, and analyzes the appearance quality of the coating film after curing and film formation.