| 摘要 |
In this injection device (100), a speed increase cylinder (2) and a pressure increase cylinder (3) that drive an injection cylinder (1) coupled to an injection plunger are coupled in parallel to the injection cylinder (1). The piston (2P) of the speed increase cylinder (2) and the piston (3P) of the pressure increase cylinder (3) are driven in synchronism by a motor (10), a ball screw (11), and a nut (12). A pilot operation check valve (4) and a flow rate adjustment circuit (5) are provided between the bottom chamber (1B) of the injection cylinder (1) and the bottom chamber (2B) of the speed increase cylinder (2). Thus, by the driving force of a single motor (10), the injection device (100) drives the injection cylinder (1) at high speed by both the speed increase cylinder (2) and the pressure increase cylinder (3), and drives the injection cylinder (1) in a high pressure state by only the pressure increase cylinder (3). |
