| 摘要 |
PROBLEM TO BE SOLVED: To provide a hand push cutter blade for trimming, thereby trimming a pair of gates extended from one end of a hollow cylindrical part forming a part of a casting without chipping in a part of the casting . SOLUTION: This hand push cutter blade 20 for trimming is a two-stage blade composed of a first blade part 21 and a second blade part 22. The first blade part 21 has a pair of first knife edges 21A, the second blade part 22 has a pair of second knife edges 22B, and the first knife edges 21A are flush with the second knife edges 22B. In trimming, first the second knife edges 22B, 22B abut on the radial inward sides 120B, 120B of the gates 120, 120 to form a notch, and subsequently the gates 120, 120 are completely cut by the first knife edges 21A, 21A. COPYRIGHT: (C)2004,JPO
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