| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection device capable of appropriately using a plurality of electric motors depending on a process progress situation.SOLUTION: An injection device 1 comprises: a plunger 5 extruding a molding material to a cavity CA; an injection electric motor 7; a pressure-boosting electric motor 9; and a coupling mechanism 11 provided among these constituent elements 5, 7, and 9. The coupling mechanism 11 includes: a piston 21 to which a drive force of the pressure-boosting electric motor 9 is transmitted and that can move along with the plunger 5; a cylinder member 25 slidably accommodating the piston 21; a pressurizing member 23 to which the drive force of the pressure-boosting electric motor 9 is transmitted and that can pressurize a liquid on a rear side of the piston 21; and a liquid controller 27 that can supply the liquid to the rear side of the piston 21 when the piston 21 moves forward relatively to the pressurizing member 23 and that can prohibit discharge of the liquid to the rear side of the piston 21 when the pressurizing member 23 moves forward. Furthermore, the liquid doe not fill a front side of the piston 21. |
