Process flow of electrostatic powder spraying production line

Electrostatic powder spraying is a commonly used surface coating technology that can provide various properties such as wear resistance, corrosion resistance, and high temperature resistance for various materials. It is widely used in various fields such as automobiles, construction, household appliances, industrial equipment, and hardware. Modern electrostatic powder spraying production line can achieve automation, multi-color spraying, high efficiency, and high-quality production, becoming one of the important methods for enterprises to improve production efficiency and reduce costs.

Let Attractivechina first introduce the process flow of electrostatic powder spraying, which includes four steps: pretreatment, spraying, baking, and cooling.

1. Pre treatment: Firstly, pre-treatment is carried out, which generally includes three processes: acid washing, phosphating, and cleaning. The function of acid pickling treatment is to remove the oxide layer on the metal surface, making the powder adhere more firmly to the metal surface. The function of phosphating treatment is to form a passivation film by chemical reaction with the metal surface, enhancing its surface adhesion. Cleaning is the final process of pre-treatment, mainly to remove residual chemicals and impurities and ensure the cleanliness of the metal surface.

2. Spraying: The second step is to spray the metal surface. The spraying equipment requires the use of an electrostatic powder spray gun. Its working principle is that the electrostatic powder spray gun generates high voltage at the front of the gun after being energized, and the powder is sprayed from the front of the gun with negative electricity. The charged powder is blown to the surface of the workpiece by high-pressure air, and the workpiece is positively charged, so the powder can be well adsorbed on the surface. When a certain thickness of coating is formed on the surface of the workpiece, electrostatic repulsion is generated by the charge to prevent the powder from continuing to adsorb, which can spray the surface of the workpiece evenly.

3. Baking: After metal spraying, it is necessary to bake and solidify the powder to tightly adhere to the metal surface, forming a smooth and flat protective coating. Heat to the set temperature in a high-temperature curing furnace to melt and level the powder, forming a uniform film layer. Generally speaking, the baking time and temperature depend on the material and performance of the workpiece. The baking time is usually 15-20 minutes, and the baking temperature is between 120 ℃ and 150 ℃.

4. Cooling: The final process is to cool the baked and cured workpiece, making the coating more stable and attached to the metal surface, avoiding problems such as peeling, peeling, and color difference after coating.

In short, the electrostatic powder spraying production line has become one of the important equipment for modern enterprise production, which can improve the utilization rate of coating powder and is more environmentally friendly than traditional spraying processes. Efficient production provides reliable guarantees for enterprises, allowing them to maintain a leading position in fierce market competition. Guangdong Chuangzhi is a manufacturer of painting equipment production lines with 30 years of rich experience in the field of painting. We have a professional design team to solve surface coating problems for your products. Friends with such needs are welcome to consult! For more information about the coating production line, please follow us for the latest information!