China Plastics ›› 2025, Vol. 39 ›› Issue (11): 125-130.DOI: 10.19491/j.issn.1001-9278.2025.11.019

• Machinery and Mould • Previous Articles    

Analysis of screw configuration for a large ϕ 380 twin⁃screw extrusion granulation unit using flow balance algorithm

BI Chao1(), ZHAO Chong1, WU Mingjun2, JI Yao2, TENG Zurong2, ZUO Shibo1, YIN Deju1   

  1. 1.Beijing University of Chemical Technology,Beijing 100029,China
    2.Nanjing High Speed Gear Manufacturing Co Ltd,Nanjing 211103,China
  • Received:2024-11-21 Online:2025-11-26 Published:2025-11-21

Abstract:

This paper reports a screw configuration analysis algorithm designed for large⁃scale twin⁃screw extrusion systems. By leveraging a performance database of screw elements, the algorithm identifies material conveying characteristics to determine the filling state within the extruder. Based on this filling state, it evaluates key operational metrics under specified processing conditions, including: filling degree and pressure distribution, shear⁃induced plastication capability, material backpressure and torque load, drive power consumption, and specific mechanical energy input. The algorithm is applied to analyze a typical screw configuration used in a ϕ380 mm twin⁃screw extrusion granulation unit for polyethylene. The findings provide a robust theoretical foundation for the systematic development and optimization of screw configuration analysis in large⁃scale extrusion processes.

Key words: twin?screw, screw configuration analysis, distribution of the filled rate, distribution of pressure

CLC Number: