LDPE双腔微管模具优化设计及实验验证  

Optimal Design and Experimental Verification of LDPE Double-lumen Microtube Die

作　　者：方坤 戴文利[1] 敬波[1] 潘建武 FANG Kun;DAI Wenli;JING Bo;PAN Jianwu(Hunan Key Laboratory of Polymer Materials Application Technology,The College of Chemistry,Xiangtan University,Xiangtan 411105,China)

机构地区：[1]湘潭大学化学学院,高分子材料应用技术湖南省重点实验室,湖南湘潭411105

出　　处：《塑料工业》2022年第7期76-80,86,共6页China Plastics Industry

摘　　要：基于管材模具设计理论,初步设计出低密度聚乙烯(LDPE)双腔微管模具流道结构,再利用Ansys-Polyflow逆向求解,固定挤出胀大段形状,求解熔体出口端面形状,并参照计算结果对模具定型段截面形状进行优化设计,得到优化后模具结构,完成LDPE双腔微管挤出成型实验。结果表明,LDPE双腔微管的最佳挤出成型工艺为螺杆转速6.0 r/min,模具温度170℃。在该工艺条件下,经数值模拟优化后的LDPE双腔微管模具制品精密度得到显著提高。Based on the design theory of pipe mold,the flow channel structure of low density polyethylene(LDPE)double-lumen micro-tube die was initially designed.Then Ansys-Polyflow was used to inverse extrusion,fix the shape of the extrusion bulge section,solve the shape of the melt outlet end section,and the design of the die land section shape according to the calculation results was optimized,and the optimized structure of the die was obtained.The extrusion molding experiment was carried out.And the results show that the reasonable extrusion molding process of LDPE double-lmen microtube is the screw speed of 6.0 r/min and the die temperature of 170℃.Under this process condition,the precision of the optimized LDPE double-lumen microtube mold product is significantly improved.

关 键 词：数值模拟 双腔微管 挤出成型 模具设计 

分 类 号：TQ342.11[化学工程—化纤工业]