| 摘要 |
PROBLEM TO BE SOLVED: To enable a material having a high wear resistance to be used by facilitating assembly of a die for forming a die for cutting a tie bar and suppressing the wear of the die at a working time. SOLUTION: Slits 3 corresponding to the number of leads and continued from the inside to the outside are formed on an upper surface 1A of each side forming the die 1. Thus, since a comb-like cutter 2 is formed long continued from the inside to the outside, a stress can be relaxed. Further, since the slits 3 are formed by moving a disc-shape grinding stone in parallel on an upper surface 1A, a damage at a working time is small, the wear resistance is improved, and a material having the low wear resistance can be used. COPYRIGHT: (C)2004,JPO |
