Numerical simulation of meshing co-rotating twin screw extrusion process under non-isothermal conditions

Authors

ZHAO Yulian, School of Material and Mechanical Engineering, Beijing Technology and Business University, Beijing 100048, China; Plastic Beijing Municipal Key Laboratory of Health and Safety Quality Evaluation Technology, Beijing 100048, China
LI Xin, School of Material and Mechanical Engineering, Beijing Technology and Business University, Beijing 100048, China; Plastic Beijing Municipal Key Laboratory of Health and Safety Quality Evaluation Technology, Beijing 100048, China
AN Qi, School of Material and Mechanical Engineering, Beijing Technology and Business University, Beijing 100048, China; Plastic Beijing Municipal Key Laboratory of Health and Safety Quality Evaluation Technology, Beijing 100048, China
HUANG Zhigang, School of Material and Mechanical Engineering, Beijing Technology and Business University, Beijing 100048, China; Plastic Beijing Municipal Key Laboratory of Health and Safety Quality Evaluation Technology, Beijing 100048, China

Abstract

The SolidWorks 3D modeling software was used to construct the meshing co-rotating twin-screw physical model. By changing the rotational speed of the PLA processed by the screw extruder, the non-isothermal flow analysis was used to carry out the corresponding numerical simulation in the polyflow software. Compare the effect of speed on the processing of PLA. The numerical results show that under non-isothermal conditions, the temperature increases linearly in the direction from the inlet to the outlet, that is, in the extrusion direction. On the Z-axis section, the temperature gradually increases outward in the radial direction. By comparing the flow field analysis at different speeds, it can be concluded that with the increase of rotational speed, there is a large temperature difference in the groove. When the rotational speed reaches 240 r/min, the polymer is partially degraded, which is not conducive to production and processing. The correlation between the shear rate field and the viscosity field is further verified by the comparative analysis.

Publication Date

4-28-2019

First Page

76

Last Page

79

DOI

10.13652/j.issn.1003-5788.2019.04.015

Recommended Citation

Yulian, ZHAO; Xin, LI; Qi, AN; and Zhigang, HUANG (2019) "Numerical simulation of meshing co-rotating twin screw extrusion process under non-isothermal conditions," Food and Machinery: Vol. 35: Iss. 4, Article 15.
DOI: 10.13652/j.issn.1003-5788.2019.04.015
Available at: https://www.ifoodmm.cn/journal/vol35/iss4/15

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