Simulation analysis of influence of pitch variation on flow field of twin screw extruder with different direction

Authors

ZHANG Yiming, School of Artificial Intelligence, Being 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 Artificial Intelligence, Being Technology and Business University, Beijing 100048, China;Plastic Beijing Municipal Key Laboratory of Health and Safety Quality Evaluation Technology, Beijing 100048, ChinaFollow
XU Zhen, School of Artificial Intelligence, Being Technology and Business University, Beijing 100048, China;Plastic Beijing Municipal Key Laboratory of Health and Safety Quality Evaluation Technology, Beijing 100048, China
CHENG Yuanyuan, School of Artificial Intelligence, Being Technology and Business University, Beijing 100048, China;Plastic Beijing Municipal Key Laboratory of Health and Safety Quality Evaluation Technology, Beijing 100048, China

Corresponding Author(s)

黄志刚（1966—），男，北京工商大学教授，博士。E-mail: huangzg@btbu.edu.cn

Abstract

Objective: Taking polylactic acid （PLA） as an example, the flow channel distribution of twin-screw extrusion under different pitch was studied. Methods: In Solidworks, two 3D models with variable pitch and constant pitch were drawn according to the theoretical end curve equation and modified. Workbench software was used to generate the required analysis models with the swept mesh method for the two screw configurations, and then Polyflow fluid simulation software was used to simulate the actual situation. After obtaining the post-processing results, FieldView software was used to analyze the final results. The pressure, shear rate and viscosity of polylactic acid fluid under simulated conditions were studied. Meanwhile, the residence time distribution curve RTD was analyzed by Polystat statistical module. Results: Under the same conditions, the pressure, shear rate and viscosity fluctuation of the screw with variable pitch increased, and the axial mixing performance improved, but the self-cleaning ability decreased. Conclusion: The change of pitch has a certain effect on polylactic acid, but too large change of pitch often produces adverse effects. Therefore, it is necessary to design suitable variable pitch screw according to the actual situation to improve the yield and quality.

Publication Date

12-26-2023

First Page

93

Last Page

99

DOI

10.13652/j.spjx.1003.5788.2023.60143

Recommended Citation

Yiming, ZHANG; Zhigang, HUANG; Zhen, XU; and Yuanyuan, CHENG (2023) "Simulation analysis of influence of pitch variation on flow field of twin screw extruder with different direction," Food and Machinery: Vol. 39: Iss. 10, Article 14.
DOI: 10.13652/j.spjx.1003.5788.2023.60143
Available at: https://www.ifoodmm.cn/journal/vol39/iss10/14

References

[1] 刘玲, 任国庆, 潘鑫, 等. 聚乳酸生产技术及市场分析[J]. 化学工业, 2021, 39（3）: 87-90. LIU L, REN G Q, PAN X, et al. Production technology and market analysis of polylactic acid[J]. Chemical Industry, 2021, 39（3）: 87-90.
[2] 耿孝正. 双螺杆挤出机及其应用[J]. 中国塑料, 2005（2）: 73. GENG X Z. Twin screw extruder and its application[J]. China Plastics, 2005（2）: 73.
[3] 孙瑾亭, 王庆生, 王国栋, 等. 变螺距螺杆真空泵转子温度场和热变形的有限元分析[J]. 真空科学与技术学报, 2017, 37（8）: 791-795. SUN J T, WANG Q S, WANG G D, et al. Finite element analysis of rotor temperature field and thermal deformation of variable pitch screw vacuum pump[J]. Journal of Vacuum Science and Technology, 2017, 37（8）: 791-795.
[4] WANG J, ZHAO X, ZHAO L, et al. Clearance distribution design and thermal deformation analysis of variable-pitch screw rotors for twin-screw vacuum pumps[J]. Vacuum, 2023, 211: 111936.
[5] 许国智. 粒子示踪法研究胶体悬浮液在复合外场下的动态[D]. 广州: 华南理工大学, 2017: 19-21. XU G Z. Study on the dynamics of colloidal suspension under composite external field by particle tracer method[D]. Guangzhou: South China University of Technology, 2017: 19-21.
[6] 陈龙, 董力群, 张亚军, 等. 基于SolidWorks API的异向双螺杆的参数化设计[J]. 中国塑料, 2018, 32（1）: 120-124. CHEN L, DONG L Q, ZHANG Y J, et al. Parametric design of double screw based on SolidWorks API[J]. China Plastics, 2018, 32（1）: 120-124.
[7] 宋俊全, 冯连勋. 啮合导向旋转双螺杆三维实体造型研究[J]. 中国塑料, 2003, 17（3）: 92-96. SONG J Q, FENG L X. Research on 3D solid modeling for the intermeshing counter-rotating twin-screw[J]. China Plastics, 2003, 17（3）: 92-96.
[8] 王少峰, 张媛, 刘美莲, 等. 不同温度状态下啮合异向双螺杆挤出机的流道分布规律[J]. 食品与机械, 2018, 34（10）: 71-74. WANG S F, ZHANG Y, LIU M L, et al. Flow channel distribution of meshing dissimilar twin-screw extruder under different temperature conditions[J]. Food & Machinery, 2018, 34（10）: 71-74.
[9] 韩海川, 刘谨, 李开国, 等. 双螺杆啮合元件与反螺纹元件对流场影响的仿真[J]. 工程塑料应用, 2020, 48（6）: 74-77. HAN H C, LIU J, LI J G, et al. Simulation of influence of twin-screw meshing element and reverse screw element on flow field[J]. Engineering Plastics Application, 2020, 48（6）: 74-77.
[10] 蒋卫鑫, 黄志刚, 赵玉莲, 等. 基于Polyflow田字形网格食品托盘挤出成型分析[J]. 食品与机械, 2017, 33（12）: 86-90. JIANG W X, HUANG Z G, ZHAO Y L, et al. Analysis of extrusion molding of food tray based on Polyflow field pattern Grid[J]. Food & Machinery, 2017, 33（12）: 86-90.
[11] 黄志刚, 蒋卫鑫, 李鑫, 等. 啮合异向双螺杆挤出机仿真研究[J]. 包装学报, 2019, 11（3）: 9-15. HUANG Z G, JIANG W X, LI X, et al. Simulation study on meshing dissimilar twin-screw extruder[J]. Journal of Packaging and Processing, 2019, 11（3）: 9-15.
[12] FORMELA K, CYSEWSKA M. Efficiency of thermomechanical reclaiming of ground tire rubber conducted in counter-rotating and co-rotating twin screw extruder[J]. Polimery, 2014, 59（3）: 231-238.
[13] 杨明山, 赵明. 塑料成型加工工艺设备[M]. 北京: 印刷工业出版社, 2010: 14-16. YANG M S, ZHAO M. Plastic forming processing technology equipment[M]. Beijing: Printing Industry Press, 2010: 14-16.
[14] 张先明. 挤出过程停留时间分布的实验研究和数值模拟[D]. 杭州: 浙江大学, 2008: 10-18. ZHANG X M. Studies on residence time distribution in twin-screw extruders using experimental method and numerical simulation[D]. Hangzhou: Zhejiang University, 2008: 10-18.
[15] 雷雁洲, 王少伟, 吕秦牛, 等. 碳纤维/聚乳酸复合材料的结晶性能和流变特性[J]. 复合材料学报, 2018, 35（6）: 1 402-1 406. LEI Y Z, WANG S W, LU Q N, et al. Crystallization and rheological properties of carbon fiber/polylactic acid composites[J]. Chinese Journal of Composites, 2018, 35（6）: 1 402-1 406.
[16] 孙苗苗, 孙小杰, 王荣, 等. 扩链剂对PGA/PBS共混体系结构及性能的影响[J]. 塑料科技, 2022, 50（4）: 5-9. SUN M M, SUN X J, WANG R, et al. Effect of chain extender on the structure and properties of PGA/PBS blends[J]. Plastic Science and Technology, 2022, 50（4）: 5-9.