Purpose

The purpose of this paper is to develop new boundary conditions for simulating the injection molding process of polymer melts.

Design/methodology/approach

The boundary conditions are derived and implemented to simulate real-life air vents (used to allow the air escape from the mold). The simulations are performed in the computational library OpenFOAM® by considering two different fluid models, namely, Newtonian and generalized Newtonian (Bird–Carreau model).

Findings

A detailed study on the accuracy of the solver interFoam for simulating the filling stage is presented, by considering simple geometries and adaptive mesh refinement. The verified code is then used to study the three-dimensional filling of a more complex geometry.

Originality/value

The results obtained showed that the numerical method is stable and allows one to model the filling process, simulating the real injection molding process.

中文翻译：

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用于模拟注塑过程填充阶段的新边界条件

目的

本文的目的是开发新的边界条件，以模拟聚合物熔体的注射成型过程。

设计/方法/方法

导出边界条件并将其实现为模拟现实生活中的通风孔（用于允许空气从模具中逸出）。通过考虑两个不同的流体模型，即牛顿模型和广义牛顿模型（Bird–Carreau模型），在计算库OpenFOAM®中进行了仿真。

发现

通过考虑简单的几何形状和自适应网格细化，详细介绍了求解器interFoam用于模拟填充阶段的精度。然后将经过验证的代码用于研究更复杂几何形状的三维填充。

创意/价值

所得结果表明，该数值方法是稳定的，并且允许人们对填充过程进行建模，从而模拟真实的注射成型过程。