注塑模具型腔壁面疲劳应力开裂的研究  

Research on Fatigue Stress Craze on Surface of Mould Cavity

作　　者：李思良[1] 

机构地区：[1]广东工业大学材料学院,广东广州510643

出　　处：《中国塑料》2006年第5期88-90,共3页China Plastics

摘　　要：研究具有局部凹陷结构的板状制品注塑模具型腔的熔体充模过程,得出导致型腔壁面疲劳应力开裂的型芯凸块侧推力计算公式。指出采用合理的成型工艺条件、提高模具材料性能和模具的热处理质量等措施只能起到阻缓此类注塑模具型腔壁面疲劳应力开裂产生的作用,而具有局部凹陷结构的板状制品注塑模具型腔壁面疲劳应力开裂的根本解决措施是合理选择进料口位置,或注塑制品结构尽量避免采用具有局部凹陷的结构形式。The process of mould filling for the fiat plastic products with local sunk was investigated; an equation to calculate the side force on core protruding which causes fatigue stress craze on surface of mould cavity was formulated. It was suggested that the fatigue stress craze could be affected by process conditions, mould material, and its heat treatment. Properly choosing the position of feed-in or avoiding the local sunk on the plastic product may be effective measure to get rid of the fatigue stress craze.

关 键 词：注塑模具 型腔壁面 疲劳应力开裂 侧推力 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]