| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a seal for a screw device capable of restraining weakening of strength of a part generated with a weld line, when injection-molding a seal lip composed of thermoplastic elastomer. <P>SOLUTION: This seal for the screw device is manufactured by using a metal mold 3 having a large number of gates 3a arranged constant in the shortest distance up to the tip of the seal lip and at an equal angle in the peripheral direction, as a metal mold used when injection-molding the seal lip. <P>COPYRIGHT: (C)2009,JPO&INPIT |
