中国塑料 ›› 2007, Vol. 21 ›› Issue (3): 58-62.

• 加工与应用 • 上一篇    下一篇

微流道中聚合物熔体的流变特性及其数值模拟

庄俭,王敏杰*,于同敏,宋满仓   

  1. 大连理工大学精密与特种加工教育部重点实验室,辽宁大连116024
  • 出版日期:2007-03-26 发布日期:2021-04-20
  • 基金资助:
    国家自然科学基金资助项目(50275020),“十一五”国家科技支持计划重点项目(2006BAF04B13)

Research on Rheological Behavior of Polymeric Melt in Micro Inj ection Molding

ZHUANG JIAN,WANG MIN-jie*,YU TONG-min,SONG MAN-cang   

  1. Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education,Dalian University of Technology, Dalian 116024,China
  • Online:2007-03-26 Published:2021-04-20

摘要: 在构建表征微尺度下熔体流变特性的勃度模型基础上,通过分析ABS熔体在不同注射温度、不同截面尺寸微流道中的压力分布,对微注射成型过程中聚合物熔体豁度变化对填充过程的影响规律进行了研究。数值模拟结果表明,在微流道中熔体的微尺度豁度小于传统勃度,且随微流道截面特征尺寸的减小而成比例减小;熔体速度分布随微流道截面特征尺寸减小而趋于均匀。

关键词: 微汁射成型, 熔体流动, 微尺度薪度模型, 数值模拟

Abstract: Basedon a viscosity model of polymeric melt representing the rheological characteristics in mi-croscale,the influence ofmelt viscosityon the filling process in micro injection molding was investigated through analyzingthepressuredistributionsof ABS at different inlet temperatures in different mi- crochannels.Numerical simulation showed that the microscale viscosity was lower than the conventional oneand reduced with the decreasing characteristic dimension of microchannel section. In addition, the curves of melt velocity at the sectionofz=5 mm became more smooth with decreasing characteristic di mension of microchannel section

Key words: micro injection molding;melt flowing, microscale viscosity model, numerical simulation

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