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首页> 外文期刊>Journal of Materials Engineering and Performance >Warpage of Injection-Molded Thermoplastics Parts: Numerical Simulation and Experimental Validation
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Warpage of Injection-Molded Thermoplastics Parts: Numerical Simulation and Experimental Validation

机译：注塑热塑性塑料零件的翘曲：数值模拟和实验验证

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摘要

A mathematical model and the integrated simulation program for predicting part warpage, which arises during injection molding of thermoplastic polymers, were developed. To build the model, the finite element method (FEM) was used and the theory of shells, represented as an assembly of flat elements formed by combining the constant strain triangular element and the discrete Kirchhoff triangular element, was applied. This shell theory is well suited for thin injection molded products of complex shape. Furthermore, in this work, experimental research on fiat plates was performed to study the effect of the plastic material, the mold structure, and certain key processing parameters on warpage. The investigated processing parameters include injection pressure, packing pressure, injection time, packing time, cooling time, and melting temperature. Different examples were presented to examine the developed simulation software, and results predicted from the simulation program were verified in the above experiments and showed reasonable accuracy compared with experiment data.
机译：开发了预测热塑性塑料注塑成型过程中零件翘曲的数学模型和集成仿真程序。为了建立模型，使用了有限元方法（FEM），并应用了壳理论，该壳理论是由恒定应变三角形单元和离散Kirchhoff三角形单元组合而成的平面单元的组合。这种壳理论非常适用于形状复杂的薄注塑产品。此外，在这项工作中，对平板进行了实验研究，以研究塑料材料，模具结构以及某些关键加工参数对翘曲的影响。研究的工艺参数包括注射压力，填充压力，注射时间，填充时间，冷却时间和熔融温度。给出了不同的示例来检查开发的仿真软件，并在上述实验中验证了从仿真程序预测的结果，并与实验数据相比显示出合理的准确性。

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