| 摘要 |
PURPOSE:To prevent bad shearing of a material and to improve accuracy of diamension of a molded article by driving a cutter at high speed using oil pressure. CONSTITUTION:A hydraulic driven device A and a hydraulic driven device B are connected to each other, and a driven piston 16 to which a shearing cutter is secured is driven by oil pressure of operating oil pushed by a driving piston 14. Accordingly, if the cross-sectional area of the driven piston 16 is set smaller than that of the driving piston 14, the piston 16 is driven at extremely high speed of multiplexing the driving speed of the piston 14 by a reciprocal of the cross-sectional area ratio. Therefore, the material is sheared 17 at high speed, so that the shearing surface is smooth, and the accuracy of dimension is improved. |
