The use of compressed air and a spray gun to spray paint to build a rectangular tube is called the spray method, which is characterized by the uniform thickness of the coating film obtained, the appearance is smooth, and the production efficiency is high. The following three processing methods for rectangular pipe spraying are introduced:
During electrostatic spraying, an electrostatic generator is used to generate a high-voltage electric field. The spray gun and the object to be coated are connected to both ends of a high-voltage electric field. Paint sprayed from a spray gun is atomized in a high-voltage electric field and deposited on the surface of a rectangular tube under the action of electrostatic forces. , forming a uniform coating film. When spraying, due to the good atomization effect of the coating, the loss is very small, the utilization rate of the coating can reach 80%-90%, and the quality of the coating film is good, which can realize continuous production. The technical requirements of electrostatic spraying are relatively high, and there are certain process requirements for paint, electrostatic spraying equipment, spraying voltage, the distance between the object being coated and the spray gun, and the flow and setting of the spray gun.
When spraying, the rectangular tube is generally grounded as the anode, and the nozzle is negative high voltage. When the electric field strength is high enough, the air near you
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