| 摘要 |
PROBLEM TO BE SOLVED: To provide a blade die for punching which discharges punching scum produced in a scum passage of a punching blade for punching from a scum discharge path while suppressing backflow of the scum in the reverse scum discharge path direction due to wind pressure or press vibration during punching.SOLUTION: In a blade die 11 which is provided with a punching blade tip 12 and a loop-shaped punching blade 12 for punching having a scum path 13 inside the punching blade, there is protruded a scum engagement blade 51 which is directed in the same direction as that of the punching blade tip 12a and provided with a notch blade tip 51a formed in the end edge and notched in the peripheral edge part of the punching scum 31b in punching, in the inner-side surface of the punching blade tip 12 of the punching blade 12 for punching.SELECTED DRAWING: Figure 1 |
