Influence of different screw configurations on the flow field of intermeshing co-rotating twin-screw extruder

Authors

ZHANG Xue-chen, School of Artificial Intelligence, Beijing Technology and Business University, Beijing 100048 , China ；Plastic Beijing Municipal Key Laboratory of Health and Safety Quality Evaluation Technology, Beijing 100048 , China
ZHANG Li-mei, School of Artificial Intelligence, Beijing Technology and Business University, Beijing 100048 , China ；Plastic Beijing Municipal Key Laboratory of Health and Safety Quality Evaluation Technology, Beijing 100048 , China
HUANG Zhi-gang, School of Artificial Intelligence, Beijing Technology and Business University, Beijing 100048 , China ；Plastic Beijing Municipal Key Laboratory of Health and Safety Quality Evaluation Technology, Beijing 100048 , China
Zhong-yao, School of Artificial Intelligence, Beijing Technology and Business University, Beijing 100048 , China ；Plastic Beijing Municipal Key Laboratory of Health and Safety Quality Evaluation Technology, Beijing 100048 , China
LI He, School of Artificial Intelligence, Beijing Technology and Business University, Beijing 100048 , China ；Plastic Beijing Municipal Key Laboratory of Health and Safety Quality Evaluation Technology, Beijing 100048 , China

Abstract

Objective:To explore the influence of different screw configurations of intermeshing co-rotating twin -screw extruder on the flow field and improve the material properties of PLA.Methods:The geometric model of double threaded element was established by using Solidworks software, and the numerical simulation was carried out in Polyflow. The post-processing analysis of the simulation results was carried out with the help of Fieldview software. The shear rate field, pressure field, velocity field, viscosity field and the residence time distribution RTD were compared to obtain the influence of screw groove depth on the flow field.Results:When the center distance was the same, the depth of the screw groove was changed by changing the ratio of the outer diameter to the inner diameter of the threaded element, physical fields and mixing performance had great differences in the flow field of intermeshing co-rotating twin-screw extruder under the same process conditions. Compared with configuration 2, configuration 1 had stronger shear effect, but configuration 2 had better pressure building ability. In the extrusion process, configuration 2 had good axial mixing ability but poor self-cleaning ability, while configuration 1 had poor axial mixing ability and good self-cleaning ability.Conclusion:The change in screw groove depth has certain effects and rules on the mixing performance of the flow field, which can effectively guide the design of threaded element for twin-screw extruder.

Publication Date

7-20-2022

First Page

99

Last Page

103

DOI

10.13652/j.spjx.1003.5788.2022.90130

Recommended Citation

Xue-chen, ZHANG; Li-mei, ZHANG; Zhi-gang, HUANG; Zhong-yao; and He, LI (2022) "Influence of different screw configurations on the flow field of intermeshing co-rotating twin-screw extruder," Food and Machinery: Vol. 38: Iss. 4, Article 17.
DOI: 10.13652/j.spjx.1003.5788.2022.90130
Available at: https://www.ifoodmm.cn/journal/vol38/iss4/17

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