中文摘要：

气体辅助注射成型的工艺参数与最后制件的中空程度有直接的关系。采用计算机模拟技术,分析了熔体温度、模具温度、气体延迟时间、预注射量和进气压力对中空率的影响。得到预注射量和进气压力对中空率的变化最为敏感;熔体温度升到一定范围后对中空率没有影响;对于圆管制件,气体延迟时间对中空率影响不明显的结论。

英文摘要：

The effects of processing parameters of gas-assisted injection molding （GAIM） on the hollow ratio of the pipe parts was studied. The process parameters, such as melt temperature, mold temperature, gas delay time, melt filled volume and gas pressure, were investigated by means of computer aided engieering （CAE） simulation. Numerical examples showed that the hollow ratio was sensitive to melt filled volume and gas pressure. Melt temperature and mold temperature had no influence on the hollow ratio when the temperature reached a specific range. Gas delay time did not have obvious influence on the hollow ratio.