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**缩水是注塑成型最常见的缺陷之一。本文分析各工艺参数对缩水的影响规律和优化方法。保压压力不足时熔体无法补偿冷却收缩一般保压压力为注射压力的50-80%。保压时间应持续到浇口完全冻结为止。模温越高收缩率越大但均匀模温有助于减少局部差异。ABS外壳制品壁厚3mm缩水率约2.**3%通过将保压压力从60MPa提升至80MPa保压时间从3秒延长至6秒缩水率降至0.8%。
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