| 摘要 |
PROBLEM TO BE SOLVED: To prevent the dimensional change of a tube in the diameter direction thereof caused by the buckling of the tube in a method for winding the tube after extrusion molding around a winding member to heat-treat the same. SOLUTION: A tube 2 after extrusion molding is wound around a winding member 1 having a plurality of tube engaging parts 3 so as to be linearly held between the tube engaging parts 3 and, the tension of the tube at the time of winding is set to a range from 1 g to below yield stress at temp. at the time of tube winding. |
