CAUSE: Particle size distribution too fine
CORRECTION: Consult with powder suppliers
CAUSE: Moisture in the powder due to improper storage
CORRECTION: Powder must stored dry at processing temperature
CAUSE: Sintering at the baffle plate and the nozzle due to excessive conveying air pressure Damage to nozzles by too high an air pressure of the feed air
CORRECTION: Reduce conveying air
CORRECTION: Check for wear on the injector – collecting nozzle
CAUSE: Poor fluidization in the powder tank due to moist compressed air or blocked fluid plate, fluid tubes
CORRECTION: Check compressed air for contamination, replace fluid plate or fluid pipes