MANUFACTURE OF TUBE WITH LINING

摘要

PURPOSE:To stick the resin to the same spiral direction as the metallic strip composing to the pipe almost along the metallic strip and to obtain the pipe with lining of rigidity with the uniform resin layer applied on the inner surface of pipe by extruding the molten resin in the sheet form by the same width as the metallic strip toward the downstream side and applying and sticking continuously the resin on the inner circumferencial surface of the pipe. CONSTITUTION:The resin flowing path 512 is formed in the die body 511 and the molten resin is fed to this resin flowing path 512 from the extruder. The molten resin fed to this resin flowing path 512 is extruded in the sheet form from the ejecting nozzle 513 formed at the top of die body 51 at the downstream side (the forward side) than the welding point with the welding torch and applied on the inner circumferencial surface of the metallic pipe 13. The width of this extruded resin is made almost same width as the width of the metallic strip 11.