| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an injection molding machine which can surely perform drive transmission to a ball screw shaft driven when an injection step is carried out.SOLUTION: An injection molding machine includes: a ball screw mechanism 10 which comprises a rotatably mounted ball screw shaft 8 and a nut body 9 screwed with the ball screw shaft 8; a bearing 12 which supports the ball screw shaft 8; and a forward and backward movable pusher plate 7 which is mounted with the bearing 12 and moves forward according to rotation of the ball screw shaft 8 when an injection step is performed. The injection molding machine further includes: a cylindrical sleeve 13 which is fitted to an outer periphery of the ball screw shaft 8 and arranged between the ball screw shaft 8 and the bearing 12; a lock nut 14 which is fitted to the ball screw shaft 8 to prevent the slipping-off of the sleeve fitted to the outer periphery of the ball screw shaft 8; and a pulley 15 which is mounted to the sleeve 13.</p> |
