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1、内螺纹瓶盖注塑模设计摘要:木设计题目为螺纹瓶盖注塑模设计,体现了盖类零件的设计要求、内容及方向,有一定的设计意义。通过对该零件模具的设计,进一步加强了设计者注塑模的基础知识,为设计更复杂的注塑模具做好了铺垫幷吸取了更深刻的经验。本设计运用塑料成型工艺及模具设计的基础知识,首先分析了塑件的成分及性能要求,为选取浇口的类型做好了准备;然后估算了塑件的体积,便于选取注塑机及确定型腔数目;最后分析了塑件的特征,确定模具的设计参数,设计要点,及推出装置的选取。通过分析间断型内螺纹瓶盖的工艺性,可知内螺纹为半圆型螺纹,由于该瓶盖的材料为聚苯乙烯(PS),该材料不宜采用强制脱
2、模。所以塑件采用内抽芯机构进行脱模,由图可知,内螺纹为两个局部段,对应在模具上制成两个内抽的滑块。当动定模分型时,在连接推杆的作用下,八个成型螺纹滑块沿T形槽移出,产生向心的收拢运动。这些滑块始终不脱离型芯座。由于瓶盖的上部分要求严格,所以釆用点浇口浇注系统,脱模后不在修正浇口的痕迹。但采用这种浇口时,常常要在模具上增加一个分型面,以便浇口凝料脱模。关键词:工艺分析塑件成型浇注系统模具结构AnterruptedboxthreadbottlecapdiedesignAbstract:Thisdesigntopiccoversthenotemolddesignfor
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