针对纤维增强PA66(Zytel 70G33L),利用Taguchi方法设计了L9实验矩阵,并采用标准变量分析方法,分析了注射压力、熔体温度、注射流率和保压压力等工艺因素对具有熔接线和无熔接注塑件拉伸强度的影响,预测最优的拉伸强度和工艺条件.研究表明:在所选择的工艺因素中,对熔接线强度影响程度依次为熔体温度(F=70.98%)、保压压力(F=14.12%)、注射速度(F=13.14%)和注射压力(F=0.82%).在优化工艺组合下熔接线强度提高了20%～50%,所预测熔接线的最优拉伸强度为156.44MPa,与具体实验值164.98MPa符合得较好.
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