| 摘要 |
PROBLEM TO BE SOLVED: To achieve inexpensive and sure punching with a small-sized and simple structure.SOLUTION: A deformation part 4 is provided on the inward side of a mold space 1a, which is installed in the mold space 1a of a female mold 1 of a punching machine, extended in the depth direction along the inner peripheral surface, and deformed with a resistance to both of a push-in direction into the mold space 1a and a withdrawal direction to the outside of the mold space. The deformation part 4 has a constitution in which a plurality of elastically-deformable deformation pieces 23 extending to the inward of the mold space 1a are provided in the depth direction of the mold space 1a.SELECTED DRAWING: Figure 2 |
