Patent ID: 7156652
Filing Date: 2007-01-02
Classification: B29C

Abstract:
1. A motor-driven injection molding apparatus comprising: a frame having an upper surface; a mold comprising: a center fixed plate supporting the stationary mold; a movable mold plate having a lower portion with two sides, and an upper edge having a projection extending therefrom, said movable mold plate disposed so as to support the movable mold, movably arranged so as to enable the movable mold and movable mold plate to approach and deviate from said center fixed plate; one or more bearing units affixed to each side of the lower portion of the movable mold plate; a slide guide disposed so as to receive the lower portion of the movable mold plate, and slidably quide said movable mold plate in approaching and deviating directions from the stationary mold and the center fixed plate, said slide guide comprising: two ball screws operable to open and close the mold, said ball screws disposed within the motor-driven injection molding apparatus so as to extend from said center fixed plate toward said movable mold plate, and engage with said movable mold plate at two points on opposing corners of the movable mold plate; an electric side motor in movable connection with the two ball screws, operable so to open and close the mold by rotating said ball screws in both forward and backward directions, thereby moving said movable mold plate toward and away from said center fixed plate; and a motor-driven injection molding mechanism having: wherein the projection on the movable mold plate is diagonally penetrated by one of the two ball screws.