| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for a synthetic resin lining tube by which a synthetic resin tube is closely joined to both end sections of a metal tube by effectively removing air between both end sections of the metal tube and the synthetic resin tube inside. SOLUTION: A thermally expandable synthetic resin tube 1 is inserted in a metal tube 2 in such a manner that both end sections may protrude from the metal tube 2, and the tubes are placed in a heating furnace, and are heated in order from the central section of the tubes to both end sections, or from one end section to the other end section in order, and the diameter of the synthetic resin tube 1 is expanded, and the synthetic resin tube 1 is closely joined to the metal tube 2 by this manufacturing method of a synthetic resin lining tube, and in such a manufacturing method, a process to suck out and discharge hot air in around both end sections of the synthetic resin tube 1, protruding from the metal tube 2, is provided. |
