对截面形状为s-3的加强筋进行工艺参数优化分析，讨论了气辅成型工艺参数对成型质量的影响程度，获得了一组较好的工艺参数组合。以此为参考标准，改变某一个工艺参数而保持其他工艺参数不变，对比研究4种不同截面形状加强筋在气辅成型条件下的成型情况，并考察了单个工艺参数对成型质量的影响趋势情况。

This paper investigates process optimization for the specific rib with section s-3 during the gas-assisted injection molding firstly, which is to get relationship between process parameters and quality evaluations,based on the Taguchi experimental design. Then, in the light of the above process conditions, a comparative study of four different cross-section ribs are done, to investigate trend of the impact of the single process parameter on forming quality, by changing one of the parameters while the others remain unchanged.