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1.?脫模困難；
2.?過度充填；
3.?模具溫度過低；
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1.?同一塑件中厚薄相差太大；
2.?存有過度銳角；
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6、制品有毛邊
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檢查原料是否徹底焙干、是否混入雜物、是否混合不同種類的原料、原料粘度影響；
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正確調校注塑機的壓力控制系統及注射速度的調整必須配合所采用的鎖模力；
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模具某些部位是否有磨損、排氣孔是否阻塞、流道設計是否合理；
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注塑機模板之間的平行度是否有偏差、模板拉桿受力分布是否均勻、螺桿止逆環和熔料筒是否磨損。
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1.制品形狀（模具構造）所致材料的流動方式；
2.熔融材料合流性不良；
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原文始發于微信公眾號（艾邦彈性體網）：TPU注塑成型制品缺陷的產生原因與解決方法