文档介绍：目录摘要····························································································· 1 关键词·························································································· 1 1 绪论·························································································· 2 毕业设计选题的背景、设计方法、目的和意义···························· 2 设计选题的背景和设计方法··················································· 2 设计的目的和意义·································································· 2 2 塑件工艺性及成型工艺条件························································