Amplitude–frequency characteristics of polymer electro-magnetic dynamic tri-screw extrusion

Authors

  • Zeng Guangsheng,

    Corresponding author
    1. Key Laboratory of New Materials and Technology for Packaging of China National Packaging Corporation, Hunan University of Technology, Zhuzhou 412007, China
    2. Key Laboratory of Advanced Materials and Technology for Packaging of Hunan Universities, Hunan University of Technology, Zhuzhou 412007, China
    • Key Laboratory of New Materials and Technology for Packaging of China National Packaging Corporation, Hunan University of Technology, Zhuzhou 412007, China
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  • Jiang Taijun,

    1. Key Laboratory of New Materials and Technology for Packaging of China National Packaging Corporation, Hunan University of Technology, Zhuzhou 412007, China
    2. Key Laboratory of Advanced Materials and Technology for Packaging of Hunan Universities, Hunan University of Technology, Zhuzhou 412007, China
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  • Qu Jinping,

    1. National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology, Guangzhou 510641, China
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  • Liu Yuejun

    1. Key Laboratory of New Materials and Technology for Packaging of China National Packaging Corporation, Hunan University of Technology, Zhuzhou 412007, China
    2. Key Laboratory of Advanced Materials and Technology for Packaging of Hunan Universities, Hunan University of Technology, Zhuzhou 412007, China
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Abstract

The mechanism of plastic forming and processing in electromagnetic dynamic tri-screw extruder is very sophisticated and the investigation of amplitude–frequency characteristic acts as the foundation of equipment design and the optimization of polymer processing parameters. A mathematical and analytical model of plastic forming in such extruder was developed and the results were nondimensional-normalized. To validate the mathematical solutions experiments based on LDPE were carried out and the experimental vibration amplitude and vibration frequency curve was obtained. Three conclusions can be drawn herein: (1) the experimental results hold a good agreement with the calculations, and thus the feasibility of the proposed model is validated; (2) the possibility of resonance closely relates to polymer melt viscosity, rotating speed, and geometry parameters of the screw; (3) resonance of the tri-screw extruder is seldom observed under normal conditions and there exists an inverse correlationship between vibration frequency and amplitude. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci 122:1778–1784, 2011

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