| 摘要 |
PROBLEM TO BE SOLVED: To reduce a cost of an injection device without enlarging the device due to increase of the number of parts. SOLUTION: The injection device is provided with a screw 20, a spline 65, a spline nut 57 transmitting a rotation to the screw 20 via the spline 65, a ball screw nut 62 and a ball screw 66 which is connected with the ball screw nut 62 and makes the screw 20 move back and forth. In this case, if the spline nut 57 having received a rotation is made rotated in a measurement process, the rotation is transmitted to the screw 20 via the spline 65 and then the screw 20 is made retreated.Accordingly, The injection device structure of the electrically driven injection molding machine is simplified, and the injection device can be miniaturized. COPYRIGHT: (C)2004,JPO
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