ELECTROMOTIVE INJECTION DEVICE

摘要

PROBLEM TO BE SOLVED: To suppress the occurrence of deviational load on a ball screw nut in the functional component arrangement structure of an electromotive injection device in which a plurality of ball screw mechanisms are used for forward/reverse traveling of an injection screw. SOLUTION: The electromotive injection device is provided with: a driving motor 8 for driving an injection screw shaft; a plurality of ball screw shafts 12A and 12B disposed parallel to the injection screw shaft; a plurality of injection driving servomotors 11A and 11B directly connecting to the ball screw shafts 12A and 12B for driving; a moving frame 6 which supports an injection screw 7, the driving motor 8 and the servomotors 11A and 11B and moves parallel to the axial direction of the injection screw according to the rotation drive of the shafts 12A and 12B; a fixed frame 4 which supports an injection cylinder 5 and the ball screw nuts 13A and 13B fitted to the shafts 12A and 12B; a plurality of guide rods 21 for slidably supporting the moving frame 6; and a controller for the tuning control of the servomotor 11A and 11B. COPYRIGHT: (C)2005,JPO&NCIPI