Uneven application (bumps)

Compressed air

• air transport pressures set too high (blowing off the powder)

Application equipment

• kinked / pinched powder hose
• poor fluidization of powder coating:
  • too much air (sucks in air)
  • too little air (fails to suck in enough powder)
• worn electrostatic parts (CORONA):
  • ejector block
  • ejector nozzle
  • ejector
  • powder hose
• worn TRIBO parts:
  • ejector block
  • ejector nozzle
  • ejector
  • charging hose
  • powder coating gun

Application equipment setup

• transport air set too low
• charging set too high (especially for repairs/multilayer painting)
• powder coating guns are too close to the sprayed surface

Paint (powder coating)

• the powder is too wet and clogs the transport routes
• the powder is too fine and clogs the transport routes:
  • the recycled material content is too high
  • too fine from production