中国塑料 ›› 2011, Vol. 25 ›› Issue (09): 90-94 .DOI: 10.19491/j.issn.1001-9278.2011.09.019

• 机械与模具 • 上一篇    下一篇

同向双螺杆拉伸元件的设计及混合性能的研究

黄凤春 马秀清 周炳斌 梁文虎   

  1. 北京化工大学
  • 收稿日期:2011-04-13 修回日期:2011-07-07 出版日期:2011-09-26 发布日期:2011-09-26

Design of Elongational Co-rotating Twin-Screw Element and Its Mixing Performance

HUANG Fengchun ZHOU Bingbin LIANG Wenhu   

  • Received:2011-04-13 Revised:2011-07-07 Online:2011-09-26 Published:2011-09-26

摘要: 根据聚合物加工过程的拉伸流动设计了一种非啮合拉伸元件,并将该元件与S形元件的两种构型的混合性能进行了对比分析。通过数值模拟得到了非啮合拉伸元件流场与S形元件流场的出入口压差及累积最大拉伸速率分布。通过实验手段将非啮合拉伸元件与S形元件对聚丙烯(PP)/聚苯乙烯(PS)不相容体系相态结构的影响进行了对比研究。结果表明,非啮合拉伸元件的输送能力不如S形元件,但拉伸效果、分散混合能力均高于S形元件。

关键词: 啮合同向双螺杆挤出机, 分散混合, 拉伸流动, 螺杆元件

Abstract: A non-intermeshing twin-screw element was designed based on the elongational flow in the polymer processing. The mixing performance of the element was compared with that of S type screw element. Cumulated maximum tensile rate distribution and differential pressure between exit and entrance were obtained by simulation for flow field of non-intermeshing elongational element and S type screw element. Moreover, the influence of non-intermeshing elongational element and S type screw element on the phase morphology incompatible polymer blends PP/PS was compared. It was found that the conveying performance of non-intermeshing elongational element was worse, but the elongational and dispersive mixing performances were better than those of S type screw element.

Key words: intermeshing co-rotating twin-screw extruder, dispersive mixing, elongational flow, screw element