摘要
构建了带有圆柱阵列微结构的微注塑制品3D模型,采用聚丙烯为原料,应用针对不可压缩性流体的三维有限元方法,根据优化的有限元网格实现体积控制来预测熔体的前沿流动。结果表明,基于3D数值模拟方法能很好地模拟出微注塑制品不同填充阶段的流动状态、温度场和速度分布;厚度方向微结构的充填过程滞后于流动前沿径向的推进,不利于微结构区域气体的排出;微圆柱结构充填时能够形成喷泉状流动前沿。
A micro column-structured model of polypropylene was formulated to predict the melt front flow in micro-injection molding process, with the volume controlled by a fixed finite element mesh. The 3D numerical simulation predicted very well the flow field during the micro-injectidn＇ molding. The melt front firstly slipped across the thickness direction of columns array, and then filled into the microstructure. Fountain shape of flow front was set up during the filling of micro columns.
出处
《中国塑料》
CAS
CSCD
北大核心
2011年第11期61-65,共5页
China Plastics
基金
国家教育部博士点基金(20094101110008)
关键词
注塑制品
微结构
三维数值模拟
喷泉状流动前沿
injection molded part
microstructure
three-dimension numerical simulation
fountain shape of flow front
