聚合物场协同原理：揭示螺杆结构优化的内在机制，提高热管理和工艺效率
DOI:
https://doi.org/10.18686/cncest.v2i2.166摘要
挤出设备的工艺效率和能耗问题成为制约聚合物挤出行业发展的关键挑战。本文提出了一种全新的聚合物场协同原理，用以指导解决传统挤出设备混合效率和能源利用效率低的问题。文章对Maddock结构、主副螺纹结构、销钉结构、波状结构四种新型非常规螺杆结构进行了有限元分析，并与传统的单螺杆进行了比较。结果表明，新型非常规螺杆流道中产生了更复杂的熔体流动模式，增强了拉伸变形或螺旋流动。在熔体挤出过程中，不同程度的拉伸或螺旋流动提高了混合和热传输效率。其中Maddock元件诱导的螺旋流对流场中的拉伸塑性变形影响最大，同时螺旋流引起了流道内熔体的径向运动，极大地促进了速度场、速度梯度场和温度梯度场之间的协同作用。拉伸或螺旋流动提高了螺杆流道内的径向热量和质量传输效率，从而提高了设备的整体工艺效率。有限元分析的结果证实了聚合物场协同原理的科学性。
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