The design of gating system had an important influence on the mold structure and the molding quality of plastic parts.Three different gating system schemes were designed for the bathroom end cover plastic parts,the matching of gate,and processes of(cool+fill+hold+warp)were analyzed by using Moldflow software.The results indicated that each scheme could make the plastic melt filled the whole cavity in a balanced way to form a complete plastic parts.In addition,the warping deformation of each schemes was relatively small and similar.Weld lines was inevitably found distributed in each scheme.However,a long continuous weld line inside the plastic part,and a ring weld line in the center of the key position(divider hole separator)were appeared in both scheme 1 and 2.That two weld lines had a serious adverse effect on the quality and performance of plastic parts.Based on the CAE analysis results,scheme 3 was selected for production verification,the plastic parts with qualified quality were obtained.
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