Based on CAE software and using the orthogonal design programs,the relationship of micro-injection molding process parameters such as mold temperature,melt temperature,injection speed,packing pressure,packing time and cooling time etc.and the quality of micro-gear parts was simulated.By using visual analysis and variance analysis method,the simulation results were analyzed.The results showed that when the mold temperature was 40℃,the melt temperature was 225℃,the injection rate was 10 cm3 / s,the holding pr...