中国塑料

中国塑料 ›› 2016, Vol. 30 ›› Issue (09): 48-53 .DOI: 10.19491/j.issn.1001-9278.2016.09.009

• 加工与应用 • 上一篇    下一篇

挤出发泡片材褶皱分析及模拟计算

朱伟林1,何亚东1,罗祎玮2,吴申康1,信春玲1   

  1. 1. 北京化工大学2. 北京化工大学机电工程学院
  • 收稿日期:2016-03-11 修回日期:2016-05-04 出版日期:2016-09-26 发布日期:2016-09-26

Numerical Simulation and Analysis of Corrugation in Foam Sheet Extrusion

  • Received:2016-03-11 Revised:2016-05-04 Online:2016-09-26 Published:2016-09-26

摘要： 结合气泡成核和生长理论模拟分析挤出发泡片材的褶皱生成过程，采用制品出机头口模后单位宽度的增长速率来反映制品褶皱数量，并通过聚苯乙烯挤出发泡实验验证其准确性。结果表明，实验中制品褶皱数量随口模间隙的减小呈先增多后减少的趋势，与模拟计算结果一致；随零切黏度和松弛时间的增大，制品的褶皱数量减少。

关键词: 挤出发泡, 气泡成核, 气泡生长, 褶皱模拟计算

Abstract: In this paper, the formation of corrugation during the processing of foam sheet was analyzed by combining bubble nucleation with growth theory. The accuracy of simulation was also experimentally verified in foam extrusion. It was found that the number of corrugation first increased and then decreased with decreasing die gap. A conclusion was drawn that increasing zero shear viscosity and relaxation time of polymer melt could decrease the amount of corrugations.

Key words: foam extrusion, bubble nucleation, bubble growth, corrugation simulation

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