Abstract: In this paper, a new type of four-platen injection compression clamping units was presented. The first mold closing was actived by the toggle mechanism, and the second was achieved by the pressurized plate. This clamping unit could improve the accuracy of mold closing. Simulations on the pressurized plates and movable plates were carried by finite element analysis software. The simulation showed that the stress and deformation of the pressurized plate and movable plate were limited to the allowable range of clamping units. The stress and deformation were uniformly distributed in the plates, which could improve the forming precision of products.

Key words: injection compression molding, four-platen injection compression, clamping unit, finite element numerical analysis, pressurized plate