| 摘要 |
PROBLEM TO BE SOLVED: To apply a proper quantity corresponding to the width size of each part of a flange part as an unreasonable extraction quantity to evade undercutting when the width size of the flange part to be an undercut engagement part is changed gradually in the longitudinal direction. SOLUTION: A single drive core 13 driving a shift cylinder 15 shared between sectional slide cores 9 and 10 is mounted on a pair of the sectional slide cores 9 and 10 arranged adjacently. When the drive core 13 is made to take shelter precedingly, one sectional slide core 9 is interlocked with the shelter to be slid to apply the unreasonable extraction quantity S1. At the same time, the other sectional slide core 10 is rotated/slid to apply a gradual change type unreasonable extraction quantity S2. COPYRIGHT: (C)2006,JPO&NCIPI
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