POWDER PAINTING APPARATUS APPLIED TO INNER SURFACE OF TUBULAR BODY

摘要

PURPOSE:To apply a paint film with a constant thickness to the inner surface of a tubular body, in painting the inner surface of the tubular body with a powder paint, by injecting the powder paint from a powder paint spray nozzle while moving a support pipe having said nozzle mounted to the leading end thereof through a heated pipe. CONSTITUTION:A tubular body B, of which the inner surface must be painted, is heated to 220-240 deg.C and moved to a rightward direction while rotated by a roller 21 and a support pipe having a transport pipe 5 of an epoxy resin type or polyester resin type powder paint A and a compressed air passage 8 provided therein is penetrated into the tubular body B to be painted. At the same time, compressed air passing through an air cooler 9 is supplied into the support pipe through a regulator 10. The air motor 3 provided to the leading end of the support pipe is rotated at 1,000-10,000rpm and the nozzle 4 provided to the leading end thereof is also simultaneously rotated while the powder paint is injected to the inner surface of the tubular body B from the nozzle 4 to form a paint film with a uniform thickness fused and adhered to the inner surface thereof.