| 摘要 |
PURPOSE:To make a clamping device smaller without being complicated by applying the injection pressure acting on the injection piston in the injection process to clamping force. CONSTITUTION:An injection cylinder 24 of an injection device 12 is formed at about the center of a housing 16 and an injection piston 25 is placed in the injection cylinder and can move forward and backward. A right part 26 of the injection cylinder 24 has a larger diameter than a left part 27 and a locking piston 29 of a locking device 28 is set in the right part of larger diameter against the injection piston 25. In such a constitution as this that the injection cylinder 24 acts as a clamping cylinder, too, and the injection pressure of the pressure oil supplied to the injection cylinder is applied as a clamping force, a clamping force corresponding to the value of the injection pressure can be obtained and a large clamping force can be easily set. |
