| 摘要 |
PURPOSE:To form the projection line having pretty cutting face with projecting both end sides in the reverse direction to the medium part with the cutting of a metal plate by forming both end sides of the male die for forming a container face body to a female die and the medium part to a male die and by forming both end sides of the female die to a male die and the medium part to a female die. CONSTITUTION:A male die 1 and female die 2 are arranged in opposition with sandwiching a metal plate 3 and when both dies 1, 2 are approached, the metal plate 3 is bent with being cut by the discrepancy of the male dies each other of both dies 1, 2 and the one end side 4a and the other end side 4b forms the projecting line 4 projecting in the reverse direction to the medium part 4c and no burr is caused on the cutting part of the projecting line 4 and a beautiful cut face is made. |
