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首页> 外文期刊>Advances in Polymer Technology >Numerical Simulation of Cavity Roughness Effects on Melt Filling in Microinjection Molding
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Numerical Simulation of Cavity Roughness Effects on Melt Filling in Microinjection Molding

机译：显微注射成型中空洞粗糙度对熔体填充影响的数值模拟

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摘要

In microinjection molding, when dimensions of molded parts, and thus the cavity are small, cavity roughness may become significant for the filling of polymer melt. In this paper, cavity roughness effects on filling polymer melt flow into a thin circular cavity were investigated numerically with the aid of a newly developed inlet-velocity iterative procedure. The roughness effects for different mold and melt temperatures, cavity thicknesses, and injection rates were investigated. The trends predicted by the numerical simulation are in good agreement with those obtained from the experiment. When the surface roughness approaches a significant portion (e.g., 10%) of the cavity thickness, the effect of surface roughness becomes extremely pronounced especially at lower mold temperatures and injection velocities.
机译：在微注射模制中，当模制零件的尺寸以及因此的空腔较小时，空腔的粗糙度对于填充聚合物熔体而言可能变得显着。在本文中，借助于新开发的入口-速度迭代程序，数值研究了腔体粗糙度对填充聚合物熔体流入薄圆形腔体的影响。研究了不同模具和熔体温度，型腔厚度和注射速率的粗糙度影响。数值模拟预测的趋势与从实验中获得的趋势非常吻合。当表面粗糙度接近型腔厚度的很大一部分（例如10％）时，特别是在较低的模具温度和较低的注射速度下，表面粗糙度的影响变得非常明显。

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