微壳体塑件充模流动三维数值模拟  

3D Numerical Simulation of Micro-Shell Plastic Mold Filling Flow

作　　者：康红梅[1] 杨文剑[1] 王院生[1] 

机构地区：[1]中国地质大学(武汉)机电学院,湖北武汉430074

出　　处：《机械设计与制造》2013年第6期177-179,共3页Machinery Design & Manufacture

基　　金：中国地质大学(武汉)中央高校基本科研业务费(2012079027)

摘　　要：针对微注塑成形中熔体充模流动行为,运用流体分析软件Fluent,对微壳体塑件熔体充模流动进行了三维稳态模拟。建立了微观黏度模型和壁面滑移模型,运用VOF多相流模型,研究了熔体充满型腔时的稳态三维流场,做出切片图分析了压力场和速度场。通过对考虑和不考虑微尺度影响(微观黏度和壁面滑移)的对比和分析,可以看到考虑微尺度因素影响时充模阻力减小约19%,而速度变化不明显。分析表明微尺度黏度对熔体流动影响显著,有利于微注塑熔体充模,而壁面滑移对充模流动影响较小。To study miro-injection plastic melt mold fllling flow,plastic micro-shell mold filling was studied in 3D steady-state simulation with Fluent.Micro-viscosity model and wall-silp model was established.With the multiphase flow model VOF,3D steady-state flow field of melt filling the cavity was discussed,and the pressure and velocity distribution was also studied with section diagram.Comparing considering and discard microscale effect（micro-viscosity and wall-slip）,the mold filling resistance decreases about 18%,and the speed variation is not obvious when considering the microscale factors.The conclusion is that the micro-viscosity influences significantly on the melt flow,and being helpful for micro-injection mold filling,and wall-slip effects slightly on melt filling.

关 键 词：微壳体 充模流动 三维稳态模拟 微尺度黏度 壁面滑移 压力场和速度场 

分 类 号：TH16[机械工程—机械制造及自动化]