When electrostatic powder is sprayed on the aluminum ceiling, powder piles occasionally appear on the ceiling surface. Please let us know the reason. thank you

Your description is not very detailed. Are you talking about irregular bumps like small graves? Some places are also called powder balls, which are generally invisible before curing and will appear after curing.

There are several reasons for the formation, which can be solved by checking one by one and finding the problem point.

1. Whether the air pressure is stable, it can't be big and small.

2. Improper adjustment of spray gun will spit powder, some of which are called powder flushing, which means improper adjustment of atomization air pressure.

3. Is the Venturi tube in the powder pump damaged?

4. Powder will appear when it is wet, but this situation should be rare, because powder will agglomerate and block the gun when it is wet.

Inspection from the above aspects should solve the problem. In addition, a good powder-spraying gunner will have the habit of shaking the muzzle vertically downward every time he sprays. If gunpowder accumulates in the gun, it will shake off, so there is little caking of gunpowder.