Finite Element Analysis on Extrusion Flow Field of Wood Plastic Composites

Xing-cong LYU; Xiao-long HAO; Yun LI; Rong-xian OU; Xin YI; Qing-wen WANG; Li-chao SUN

doi:10.12326/j.2096-9694.2021085

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Finite Element Analysis on Extrusion Flow Field of Wood Plastic Composites
1.Key Laboratory for Biobased Materials and Energy of Ministry of Education，South China Agricultural University， Guangzhou 510642，Guangdong，China
2.Guangdong Laboratory of Lingnan Modern Agriculture，Guangzhou 510642，Guangdong，China
3.National Forestry and Grassland Administration Key Laboratory of Plant Fiber Functional Materials， Fuzhou 350002，Fujian，China
Vol. 36, Issue 2, Pages: 71-80(2022)
DOI： 10.12326/j.2096-9694.2021085

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吕兴聪,郝笑龙,李昀等.木塑复合材料挤出成型流场的有限元分析[J].木材科学与技术,2022,36(02):71-80.

LYU Xing-cong,HAO Xiao-long,LI Yun,et al.Finite Element Analysis on Extrusion Flow Field of Wood Plastic Composites[J].Chinese Journal of Wood Science and Technology,2022,36(02):71-80.
吕兴聪,郝笑龙,李昀等.木塑复合材料挤出成型流场的有限元分析[J].木材科学与技术,2022,36(02):71-80. DOI： 10.12326/j.2096-9694.2021085.

LYU Xing-cong,HAO Xiao-long,LI Yun,et al.Finite Element Analysis on Extrusion Flow Field of Wood Plastic Composites[J].Chinese Journal of Wood Science and Technology,2022,36(02):71-80. DOI： 10.12326/j.2096-9694.2021085.

摘要

在不同螺杆转速和模具温度条件下制备木塑复合材料，采用旋转流变仪得到不同加工工艺流变参数。利用Polyflow有限元分析软件模拟分析挤出工艺对挤出成型流场的影响。结果表明，随着螺杆转速的增加，压力场波动变化并明显提高，挤出口模的速度场和剪切速率场均明显提高，黏度场逐渐降低，螺杆转速为20 r/min时压力相对平稳；模具温度对速度场和剪切速率场影响较小，但模具温度越高压力场越小。挤出成型流场的有限元分析结果与试验结果基本吻合。

Abstract

Wood plastic composites were manufactured at different screw speeds and mold temperatures. The rheological parameters of different processing steps were obtained by the rotating rheometer. The influence of extrusion process on the flow field was simulated and analyzed by Polyflow finite element analysis software. The results showed that with the increase of the screw speed, the pressure field fluctuated and increased significantly, and velocity and shear rate field of the die increased significantly. The viscosity field decreased gradually. The pressure is relatively stable when the screw speed is 20 r/min. The pressure field decreased when the mold temperature increased. However, the mold temperature had a little effect on the velocity and the shear rate field. The finite element analysis findings were basically consistent with the experimental results.

关键词

木塑复合材料成型工艺模具流场螺杆转速模具温度

Keywords

wood-plastic compositemolding processdie flow fieldscrew speeddie temperature

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