PURPOSE: To produce a synthetic resin coated metal pipe capable of uniformly heating a metal pipe in which a synthetic resin tube is inserted over the whole of the pipe and becoming uniform in the adhesive strength of the metal pipe and the synthetic resin tube over the whole of the pipe.
CONSTITUTION: A metal pipe 1 having a synthetic resin tube 2 inserted therein or fitted to the outer surface thereof is moved in the direction crossing the pipe axis thereof at a right angle by a conveyor 3 and an electromagnetic induction heating coil 11 is arranged obliquely with respect to the moving direction of the metal pipe 1 to surround the conveyor 3 and the metal pipe 1 and auxiliary heating devices 4 are arranged so as to cover the end parts of the metal pipe 1. The metal pipe 1 is continuously heated from one end thereof to the other end thereof to closely bond the synthetic resin tube 2 to the metal pipe to produce a synthetic resin coated metal pipe wherein at least one of the inner and outer surfaces of the metal pipe is coated with a synthetic resin.
| JP5765436 | Inner surface coated steel pipe |
| JPS62141385 | LAMINATED PIPE |
SUGIMOTO YUJI
OMORI KATSUMI
TODO KUNIO
NAKAJIMA SADATOSHI
