| 摘要 |
PURPOSE:To effect proper pressure keeping process and permit accurate molding by a method wherein a driving torque is inputted into a screw from a motor for injection after a filling process employing the torque of flywheel to control the driving torque of the motor or the transmitting torque of a solenoid clutch. CONSTITUTION:The torque of a flywheel 36 is inputted into a ball screw 16 and the filling operation of molten resin is effected under a high speed and a high pressure. When a screw 10 is advanced to a predetermined position, a comparator 50 detects that the signal of a screw position detector 48 coincides with a set value by a pressure keeping switching position setter 54, a controller 56 releases a solenoid clutch 34 and connects another solenoid clutch 24 while a driving force for the ball screw 16 is switched from the flywheel 36 to a motor 26 for injection. Under this condition, the driving torque is controlled based on the set value of the pressure keeping setter 38. According to this method, the proper pressure keeping process may be effected, precise molding may be effected and a molded form, having a good quality, may be obtained. |
