Production technology of automobile painting production line

Pretreatment process, priming line process, coating line process.

1. Pretreatment process: In order to obtain high-quality painting effect and good anticorrosion performance, the car body surface must be treated before painting, including removing impurities such as oil stain, rust and scale, and necessary surface chemical treatment and transformation. Through pretreatment process, the adhesion and corrosion resistance of car body coating can be improved, the protective effect of coating can be fully exerted, and the service life of coating can be prolonged.

2. Bottom powder line process: the workpiece enters the spray gun position of the powder spraying room through the conveyor chain to prepare for the spraying operation. The electrostatic generator releases high-voltage static electricity (negative electrode) to the space in the direction of the workpiece through the electrode needle of the spray gun mouth, so that the mixture of powder and compressed air ejected from the spray gun mouth and the air around the electrode are ionized (negatively charged). The workpiece is grounded (grounded) through the hanger and the conveying chain, so that electric field powder is formed between the spray gun and the workpiece, which reaches the surface of the workpiece under the double push of electric field force and compressed air pressure, and a uniform coating is formed on the surface of the workpiece through electrostatic attraction.

3. Spray painting line technology: Spray painting is a surface treatment for covering qualified products and semi-finished products. Spray painting plays the role of rust prevention, corrosion prevention, beauty and symbol. Pretreatment must be carried out before painting. At this time, the painted products should be inspected as a whole, and the repairable defects should be repaired and remedied.