中国塑料 ›› 2008, Vol. 22 ›› Issue (03): 86-90.DOI: 10.19491/j.issn.1001-9278.2008.03.019

• 机械与模具 • 上一篇    

啮合异向双螺杆不同螺纹元件的数值模拟及其制备PP阻燃电缆的研究

罗兵,龙志斌,何敏   

  1. 北京化工大学机电工程学院,北京100029
  • 收稿日期:2007-11-29 修回日期:1900-01-01 出版日期:2008-03-26 发布日期:2008-03-26

Numerical Simulation of Dit'ferent Screw Elements in A Counter-Rotating Twin Screw Extruder and Their Application in Preparation of Flame-Retarded PP

LUO Bing,LONG Zhi-bin,HE Min   

  1. College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2007-11-29 Revised:1900-01-01 Online:2008-03-26 Published:2008-03-26
  • Contact: LUO Bing

摘要: 首先应用POLYELOW软件对啮合异向双螺杆常规三头螺纹元件和VCR(Various Clearances Rotors)元件进行流场模拟。通过对剪切速率场、压力场、平均剪切速率分布、平均压力分布、停留时间分布、最大剪切速率概率密度分布的对比研究,发现VCR元件和常规三头螺纹元件均有较好的混合能力。分别用带有这两种元件的螺杆组合对即阻燃材料进行挤出实验,制得了力学性能较好的样条,实验结果与模拟预期的结论基本一致。

关键词: 啮合异向双螺杆, 常规三头螺纹元件, 混合元件, 数值模拟, 聚丙烯阻燃材料

Abstract: the flow field of VCR and the triple screw elements in intermeshing counterrotating twin screw extruder was simulated using POLYFLOW software. }Che shear rate field, pressure field, average shear rate distribution, average pressure distribution, residence time distribution, and density distribution of max shear rate distribution were compared and studied. It was concluded that both elements possessed good mixing ability. Flame-retarded PP samples were extruded using extruders of two screw configurations with the two elements. The samples exhibited good mechanical properties with the determined values being agreement with simulation results.

Key words: intermeshing counter-rotating twin screw, normal triple screw element, mixing element, numerical simulation, flame-retarded polypropylene