Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (4): 57-60.

• Mechanical Engineering • Previous Articles     Next Articles

Numerical Simulation of Melt Flow Characteristics in Spiral Mandrel Die for Blown Film

Ma Xiang-jun  Tong Yu-bao  He He-zhi  Qu Jin-ping   

  1. National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology,, Guangzhou 510640, Guangdong, China
  • Received:2008-04-03 Revised:2008-06-25 Online:2009-04-25 Published:2009-04-25
  • Contact: 麻向军（1966-），男，博士，副教授，主要从事材料成型过程的数值模拟研究． E-mail:xjma@scut．edu．cn
  • About author:麻向军（1966-），男，博士，副教授，主要从事材料成型过程的数值模拟研究．
  • Supported by:

    国家自然科学基金资助项目（10590351）

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Abstract:

In order to reveal the flow characteristics of melt in spiral mandrel die for blown film, the melt flow field is investigated via a 3D numerical simulation using the CFD software Polyflow. The results show that （ 1 ） with the gradual fadeaway of spiral groove, the flow direction of the melt in spiral groove changes from the one along the spiral groove into the one along the mandrel axis; （2） though there exists a small circumferential velocity component in the initial area, the melt in annulus clearance mainly flows along the mandrel axis with the increase of clearance thickness ; and （3） the isobar of the melt in groove perpendicular to the groove becomes perpendicular to the mandrel axis, while that in annulus clearance inclining to the mandrel axis becomes perpendicular to the mandrel axis.

Key words: spiral mandrel die, flow field, isobar, numerical simulation