company news about Factors affecting spraying effect in electrostatic spraying equipment

The coating effect of electrostatic spraying equipment is a hot topic that we are more concerned about, but the coating effect is affected by many factors. 1. The grounding requirement of the electrostatic spray gun is in the electrostatic spraying of the inner panel of the car body. Because the body door eyebrow, window frame and cylinder are small and slender shapes, the spray width is required to be adjusted to a smaller spray width to reduce the overspray of paint mist. The overlap width of the spray pattern should be maintained, and the overlap rate is generally 66% for the medium coating, while the overlap rate is 75% for the color paint layer with high appearance requirements such as silver and gold.

2, the driving force of air pressure electrostatic spraying is the electric field strength, and there is an electrostatic atomization effect in the spraying process, so under the same pipeline painting system conditions, the pressure required by the air electrostatic spray gun is lower than that of the ordinary air spray gun. On the one hand, too high air pressure will affect the normal operation of the turbine generator, on the other hand, it will also affect the electrostatic effect. Too high air pressure will produce a lot of paint fog rebound, weakening the electrostatic effect. The air pressure is generally 0.40 ~ 0.55MPa.

In the robot high-speed rotary cup electrostatic spraying, the shaping air of the electrostatic spraying equipment can only adjust the amplitude of the paint mist flow and push the paint mist to the coated object, but can not atomize the paint droplets generated on the edge of the rotary cup after high speed mechanical atomization again. Therefore, in the robot high-speed rotary cup electrostatic spraying, it is recommended to use the lowest shaping gas flow as far as possible. Too high will also cause serious paint rebound, affecting the coating effect.