(3) Control of Film thikcness
For spraying technicians, it is understand that if the film too thin, in addition to particles, it will produce poor leveling, severe orange peel, and poor hiding power of the light colors, while the acid and alkali resistance, Salt tolerance,water-tolerant and other performance of coating will be worse. Appropriate increase the thickness of coating can effectively reduce the formation of particles, and not be too thick. Generally, if too thick will affect the size of workpiece, and the properties such as impact resistance, flexibility and adhesion will be reduced. Layer thickness control between 40~120um. We can control the film thickness in the following ways:
a. The number and arrangement of the spray guns in the powder spray booth.
b. The powder output and air pressure of the spray gun (powder out, atomization, fluidization parameters)
c. Running speed. Chain speed.
d. Suspending method and arrangement of coated workpieces.