| 摘要 |
PROBLEM TO BE SOLVED: To provide an ejector mechanism of an injection molding machine, which dispenses with an actuator exclusive to an ejector. SOLUTION: This ejector mechanism of the injection molding machine is equipped with: a servomotor 1 for closing/opening a mold; a ball spline 2 which is to be rotated by being coupled to the servomotor 1, a nut 3 which advances/retreats by being screwed to the ball spline 2; a case 7 which is fixed to the nut 3 and elongated longer than the ball spline 2 in such a manner as to surround the ball spline 2; a movable platen 4 which is fixed to the tip side of the case 7; an ejector plate 5 which is built in the back-end side of the movable platen 4; and an ejector pin 6 which is provided in such a manner as to penetrate the movable platen 4 from the ejector plate 5. The movable platen 4 advances when the servomotor 1 runs in the normal direction; the movable platen 4 retreats when the servomotor 1 runs in the reverse direction; and the tip part of the ball spline 2 abuts on the ejector plate 5, so that a molding can be ejected by the ejector pin 6. COPYRIGHT: (C)2004,JPO
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