| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for a seal ring capable of suppressing a secular change of a sealing characteristic and thereby improving a sealing property in an endless type or a straight cut type resin seal ring manufactured by cutting a material 1A. SOLUTION: The material 1A is made to creep by performing a heat treatment for the material 1A in a state of the material 1A restricted by a restricting jig 31 having the same inner diameter d2 as an outer diameter d1 of the material 1A. The material 1A is cut after generation of creep. |
