摘要
针对汽车玻璃塑料包边成型生产中易出现黏合撕裂强度不足的问题,文章研究了浇口位置的设定方法,根据生产中玻璃的形态和塑料包边断面的变化情况,建立包边注塑通用简化模型;根据玻璃嵌件的物理特性,设定熔体与玻璃、模具之间的边界条件,建立传递方程;分别运用数值计算和试验方法得到沿流道方向和包边横截面上的温度和压力分布,分析不同浇口位置对黏合撕裂强度的影响。结果表明,在综合考虑玻璃几何形状的前提下,在位于曲率变化较大的位置附近设定浇口,有利于保障压力平衡且减少注射和保压阶段温度的波动,对包边注塑的浇口设计和工艺、模具设计有指导作用。
Aiming at the shortage of tensile strength in boundary injection molding ot vehtcte grass, me design method of gate position is proposed. According to the geometric patterns and the section varie- ties of the glass in production, the universal simplified model of the boundary injection molding is set up. According to the physical behavior of glass, the boundary conditions among the melt, glass and mold cavity are put forward, and the transport equations are set up. Numerical and experimental methods are introduced to obtain the temperature and pressure distributions of melt along the runner and sections respectively, and the influence of different gate positions on the tearing strength is ana- lyzed. The results show that in view of the geometric shape of glass, the gate setting near the position with acute curvature helps pressure equilibrium and temperature fluctuation reduction during the injec- tion and pressing. The research is helpful for the gate design and the processing and mold layout in boundary injection molding.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第1期24-28,共5页
Journal of Hefei University of Technology：Natural Science
基金
福建省高等学校新世纪优秀人才支持计划资助项目(2010-24)
福建省教育厅资助省属高校科研专项资金资助项目(JK2010038)
福建省教育厅科技计划资助项目(JA11189)
福建省企业技术创新专项资金资助项目(2011-702-04)
关键词
包边玻璃
注塑成型
浇口位置
撕裂强度
熔体平衡
glass wrapped with plastic
injection molding
gate position
tearing strength
melt equi-librium
