中国塑料 ›› 2025, Vol. 39 ›› Issue (6): 54-58.DOI: 10.19491/j.issn.1001-9278.2025.06.011

• 加工与应用 • 上一篇    下一篇

非等温环境中异向双螺杆挤出机不同接触状态对聚乳酸流动影响的仿真

程媛媛1,2(), 黄志刚1,2(), 徐珍1,2, 孙晨昊1,2, 吴运涛1,2   

  1. 1.北京工商大学人工智能学院,北京 100084
    2.塑料卫生与安全质量评价技术北京市重点实验室,北京 100048
  • 收稿日期:2024-09-22 出版日期:2025-06-26 发布日期:2025-06-20
  • 通讯作者: 黄志刚(1966—),男,北京工商大学教授,博士,huangzg@btbu.edu. cn
    E-mail:xinyuanicy@163.com;huangzg@btbu.edu. cn
  • 作者简介:程媛媛(1999-),女,北京工商大学在读硕士研究生,xinyuanicy@163.com
  • 基金资助:
    国家自然科学基金面上项目(32172277)

Simulation effects of different contact states of isotropic twin⁃screw extruder on polylactic acid melt flow under non⁃isothermal conditions

CHENG Yuanyuan1,2(), HUANG Zhigang1,2(), XU Zhen1,2, SUN Chenhao1,2, WU Yuntao1,2   

  1. 1.School of Artificial Intelligence,Beijing Technology and Business University,Beijing 100048,China
    2.Plastic Beijing Municipal Key Laboratory of Health and Safety Quality Evaluation Technology,Beijing 100048,China
  • Received:2024-09-22 Online:2025-06-26 Published:2025-06-20
  • Contact: HUANG Zhigang E-mail:xinyuanicy@163.com;huangzg@btbu.edu. cn

摘要:

探索在非等温问题中异向双螺杆挤出聚乳酸时不同接触状态对其流道特性变化的影响。利用Solidworks建立完全啮合、部分啮合和无啮合的3种螺杆模型,在Polyflow分析软件中进行相应的数值模拟,对3种螺杆不同接触状态下的聚乳酸流体温度场、剪切速率场与黏度场进行对比研究。结果表明,在非等温问题中,完全啮合状态下聚乳酸熔体具有高剪切速率与适中的黏度的特点,该特点有利于聚乳酸高效高质地挤出;非等温环境中聚乳酸在完全啮合状态下的挤出效果优于其他2种螺杆接触状态。

关键词: 双螺杆挤出机, 异向啮合, 非等温, 不同接触状态

Abstract:

This article reported an investigation on the impact of various contact conditions on the changes in channel characteristics during the extrusion of polylactic acid (PLA) using an opposite⁃direction twin⁃screw extruder in non⁃isothermal issues. Three screw models, including complete meshing, partial meshing, and no meshing were constructed by a Solidworks® software, and corresponding numerical simulations were carried out by a Polyflow® analysis software. A comparative study was conducted on the pressure field, shear rate field, and viscosity field of the PLA fluid under different contact states of the three screw models. In the non⁃isothermal case, the complete meshing state exhibited high shear rates and moderate viscosity, which was consistent with the efficient extrusion of PLA. In conclusion, the extrusion effect of PLA in the complete meshing state was superior to the other two screw contact states under non⁃isothermal conditions.

Key words: twin?screw extruder, counter?rotation, non?isothermal, various contact states

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