Mold-thickness adjustment mechanism for toggle type vertical molding machine

摘要

An inconvenience where using a mold-thickness adjustment mechanism according to a toothed wheels with a large diameter for a toggle type vertical mold-clamping device in which a fixed plate, a pressure-receiving plate and a movable platen or the like is constituted by an oblong plate body is solved by using intermediate toothed wheels engaging with a pair of toothed wheels on a tie-bar side. Ends of four pieces of tie-bar 4 are secured to a fixed plate 1. The other ends are formed into threaded shafts 5, and are clamped and fixed to the pressure-receiving plate 2 by means of adjusting nuts with a toothed wheel 8 on an outer surface of the pressure-receiving plate, which toothed wheels are in position. Toothed wheels 16 with the large diameter for mold-thickness adjustment is provided together with a toothed wheel-driving motor 22 on the side of the pressure-receiving plate on the central portion of an outer surface of a pressure-receiving plate. Intermediate toothed wheels 17 are arranged between the toothed wheels 16 with the large diameter and a pair of toothed wheels 8 and 8 of one side of the pressure-receiving plate to engage each other. A pair of the toothed wheels 8 and 8 is designed to rotate by rotation of the intermediate toothed wheels 17 at same time, whereby a diameter of the toothed wheel 16 with the large diameter is constituted approximately equally to the breadth of the plate body of the pressure-receiving plate 2.