微壳体塑件充模流动三维数值模拟

Machinery Design & Manufacture(2013)

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Abstract
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。
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Key words
Micro-Viscosity,Mold Filling,3D Steady-State Simulation,Wall-Slip,Pressure and Velocity Distribution,Micro-Shell
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