What are the structure of powder spraying？

An electrostatic powder spraying system is mainly composed of a powder supply device, one or several sets of electrostatic spray guns and control devices, an electrostatic generator (usually configured in the electrostatic spray gun) and a set of powder recovery device.

Powder supply device
In the powder supply device, the powder is in a fluidized state, which is achieved by the action of compressed air, and then the powder is carried by the high-speed airflow through the siphon effect to form a powder-gas mixture, and then passes through the Venturi powder pump. , The powder delivery pipe, and finally reach the spray gun.
The powder delivered to the spray gun can be controlled. Specifically, the parameters of the powder and air can be adjusted separately, and the powder output and the atomization state of the powder can be changed, so that different coating film thicknesses can be realized to meet the needs of different products. The powder supply device has sufficient capacity, even if the powder pipe of the spray gun is 50 feet long, it can provide sufficient pressure and flow.
The high voltage and low current generated by the static electricity generating device cause the electrode needle located at the front of the spray gun to discharge in the air. When the powder is sprayed through the nozzle of the gun head, the powder particles are charged, and they are transported by electrostatic adsorption and airflow. Double action to reach the surface of the workpiece that has been grounded.
The spray gun can generate enough voltage to ensure the maximum coating effect. The maximum voltage can reach 100kV. When spraying inner corners or deep cavity parts, the spray gun can effectively overcome the Faraday cage effect and ensure that all surfaces of the workpiece that are required to be sprayed can be sprayed. Achieve good coverage and uniform film thickness.

spray gun
The structural design of the spray gun must meet the charging requirements of the powder, and the functional design must meet the spraying requirements of various forms of spraying operations and various shapes of workpieces.
Powder coating is a new process in surface coating technology. It is a coating process in which powder is applied and a film is formed. It can replace traditional paint craftsmanship in many occasions. It has been widely used at home and abroad.