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首页> 外文期刊>Journal of Applied Polymer Science >Computer simulation of the filling process in gas-assisted injection molding based on gas-penetration modeling
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Computer simulation of the filling process in gas-assisted injection molding based on gas-penetration modeling

机译：基于气体渗透模型的气体辅助注射成型过程的计算机模拟

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摘要

Gas-assisted injection molding can effectively produce parts free of sink marks in thick sections and free of warpage in long plates. This article concerns the numerical simulation of melt flow and gas penetration during the filling stage in gas-assisted injection molding. By taking the influence of gas penetration on the melt flow as boundary conditions of the melt-filling region, a hybrid finite-element/finite-difference method similar to conventional-injection molding simulation was used in the gas-assisted injection molding-filling simulation. For gas penetration within the gas channel, an analytical formulation of the gas-penetration thickness ratio was deduced based on the matching asymptotic expansion method. Finally, an experiment was employed to verify this proposed simulation scheme and gas-penetration model, by comparing the results of the experiment with the simulation. (C) 2003 Wiley Periodicals, Inc. [References: 23]
机译：气体辅助注射成型可以有效地生产出厚壁部分无凹陷痕迹且长板无翘曲的零件。本文涉及气体辅助注射成型填充阶段熔体流动和气体渗透的数值模拟。通过将气体渗透对熔体流动的影响作为熔体填充区域的边界条件，在气体辅助注射成型-填充模拟中使用类似于常规注射成型模拟的混合有限元/有限差分方法。对于气体在气体通道内的渗透，基于匹配渐近膨胀法推导了气体渗透厚度比的解析公式。最后，通过将实验结果与模拟结果进行比较，通过实验验证了该拟议的模拟方案和气体渗透模型。 （C）2003 Wiley Periodicals，Inc. [参考：23]

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