Optimization of plastics injection molding processing parameters based on the minimization of sink marks

In order to avoid the surface sink marks on the automobile dashboard decorative covers, the combined effects of multi-molding process parameters are analyzed by the combination of orthogonal experiments and Moldflow simulation tests. By this method, it can gain the experiment data which can reflect the overall situation using fewer number of simulation test. Furthermore, the effects degree of different molding process parameters for surface sink marks are investigated, and the reasonable gate location and optimized parameter combination is obtained. It can solve the unreasonable appearance of process parameter settings. The mold design above mentioned can fasten the mold developing schedule, thus shorten the cycle of product development, and improve the quality of products and the competitive ability of enterprise.