超薄注塑充模中的次相剪切效应

华南理工大学学报(自然科学版) ›› 2012, Vol. 40 ›› Issue (12): 58-63,85.

超薄注塑充模中的次相剪切效应

殷素峰¹阮锋¹王建宇²

1．华南理工大学机械与汽车工程学院，广东广州 510640; 2．东莞市奕东电子有限公司，广东东莞5 23106

收稿日期:2012-05-18 修回日期:2012-08-05 出版日期:2012-12-25 发布日期:2012-11-02
通信作者: 殷素峰(1971-) ，男，博士生，主要从事模具计算机技术及特种塑性成型研究． E-mail:yinsf1971@sina.com
作者简介:殷素峰(1971-) ，男，博士生，主要从事模具计算机技术及特种塑性成型研究．
基金资助:
广东省建设现代化产业体系技术创新滚动计划项目( 2009863024) ; 粤港关键领域重点突破项目( 2009205200001)

Secondary-Phase Shear Effect in Ultra-Thin Injection Molding Process

Yin Su-feng¹Ruan Feng¹Wang Jian-yu²

1. School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China;2. Dongguan Yidong Electronic Co.,Ltd.,Dongguan 523106,Guangdong,China

Received:2012-05-18 Revised:2012-08-05 Online:2012-12-25 Published:2012-11-02
Contact: 殷素峰(1971-) ，男，博士生，主要从事模具计算机技术及特种塑性成型研究． E-mail:yinsf1971@sina.com
About author:殷素峰(1971-) ，男，博士生，主要从事模具计算机技术及特种塑性成型研究．
Supported by:
广东省建设现代化产业体系技术创新滚动计划项目( 2009863024) ; 粤港关键领域重点突破项目( 2009205200001)

摘要/Abstract

摘要： 为克服超薄注塑充模的困难，定义了主、次相剪切的概念，分析了超薄注塑剪切场．根据泊肃叶方程，通过狭缝流变实验，重点讨论了超薄注塑过程中次相剪切对表观黏度、表观剪应力的影响，分析了次相剪切与粘性升温、入口压力的关系，发现次相剪切能有效改善超薄注塑中的熔体充模．文中还提出了超薄导光板的表面微特征混排设计方法，使熔体在流动平面内形成次相剪切，有效提高了制件填充率，验证了次相剪切效应的理论正确性．

关键词: 超薄注塑, 次相剪切, 流变实验, 导光板

Abstract:

In order to overcome the difficulties existing in ultra-thin injection molding,the concepts of primaryphase and secondary-phase shears are defined,and the shear field of ultra-thin injection molding is analyzed. Then,based on the Poiseuille equation,the effects of the secondary-phase shear on the apparent viscosity and the apparent shear stress in the ultra-thin injection molding process are discussed in detail through slit rheological experiments,and the relationship between the secondary-phase shear and the viscous heating on the one hand and the gate pressure on the other is analyzed,finding that the secondary-phase shear effectively improves the melt filling during the ultra-thin injection molding. Moreover,a mixed network method is presented for the design of ultra-thin light guide plates,which helps to form secondary-phase shear in the melt-flowing plane and effectively improves the filling rate of products. The theoretical correctness of the secondary-phase shear effect is finally verified by experiments.

Key words: ultra-thin injection molding, secondary-phase shear, rheological experiment, light guide plate

殷素峰阮锋王建宇. 超薄注塑充模中的次相剪切效应[J]. 华南理工大学学报(自然科学版), 2012, 40(12): 58-63,85.

Yin Su-feng Ruan Feng Wang Jian-yu. Secondary-Phase Shear Effect in Ultra-Thin Injection Molding Process[J]. Journal of South China University of Technology(Natural Science Edition), 2012, 40(12): 58-63,85.