APPARATUS OF PLASTIC POWDER SIMULTANEOUS COATING ONTO INTERIOR AND EXTERIOR SURFACES OF METAL PIPES AND THEROF EXTERIOR AND INTERIOR PLASTIC COATED METAL PIPES

摘要

The present invention relates to an apparatus for simultaneously coating both sides of a metal pipe with metal powder which includes a frame; a pipe roller which has multiple turning rollers provided in an upper part of the frame; a powder coater which is inserted into a metal pipe rotated by the turning rollers and has a powder spray gun, which moves forward and backward; a plastic powder flame coater which is closely arranged to the outer surface of the metal pipe; at least one plastic powder supplier which is connected to the powder coater and plastic powder flame coater for supplying plastic powder; an air compressor which is connected to at least one plastic powder supplier and powder coater; and a combustion gas supplier which is connected to the plastic powder flame coater. A metal pipe having one open side or both open sides of inlet and outlet, or a metal tank, which forms a flange with a radius greater than or equal to 5 cm in one side or both sides, can be simultaneously plastic powder-coated using the present invention.