| 摘要 |
PROBLEM TO BE SOLVED: To provide a die for an oil seal capable of easily forming a thread groove.SOLUTION: In this die 1 for an oil seal for molding an oil seal 50 including a plurality of thread projections 71 exerting pump action on a seal surface 66 of a seal lip 61, a thread groove 4 for forming the thread projections 71 formed by form-rolling by pressing of a plurality of groove forming projections 11 arranged on a rolling die 10 is formed on a tapered screw formation surface 3 including a seal surface formation region 82 for forming at least the seal surface 66. |
