According to numerical simulation about inject forming process and Taguchi experimental method,precision molding process simulation experiment of fine-pitch gear was performed.Through the analysis of S/N ratio and ANOVA methods,the effect of mold surface temperature,packing pressure,and packing time as well as the interaction of the three parameters on the volumetric shrinkage were investigated.The results showed that the process parameters of effecting on volumetric shrinkage in descending order were:mold ...