| 摘要 |
PROBLEM TO BE SOLVED: To always distribute lubricant oil to whole of a screw part of a ball screw mechanism in an in-line screw type injection molding machine where a screw lead of the screw shaft of the ball screw mechanism rotationally driven by a motor for injecting is set to be not less than the diameter of the screw. SOLUTION: In the in-line screw type injection molding machine, the screw is rotatably and movably forward and backward arranged in a heating cylinder, and the rotation of the motor for injecting is converted into a linear motion by the ball screw mechanism so as to linearly move the screw. The screw lead of the screw shaft of the ball screw mechanism rotationally driven by the motor for injecting is set to be not less than the diameter of the screw and the nut body of the ball screw mechanism screwed with the screw shaft is rotated during the period except injection step. COPYRIGHT: (C)2009,JPO&INPIT
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