不同气体流动模式下的气体辅助注射成型——隐式直接算法在温度场模拟中的应用  

Gas-assisted Injection Molding with Different Flow Patterns of Injection Gas

作　　者：张旭浩[1] 彭义波[1] 张玉清[1] 付晓蓉[1] 杨鸣波[2] 

机构地区：[1]四川大学化学工程学院,四川成都610065 [2]四川大学高分子科学与工程学院,四川成都610065

出　　处：《中国塑料》2016年第6期63-69,共7页China Plastics

基　　金：国家重点基础研究计划(973计划)资助项目(2012CB025902)

摘　　要：对气辅成型冷却过程的温度场进行了数据模拟,通过对持续注射氮气聚合物气体辅助注射成型(GAIM)冷却过程的合理假设,采用结晶温度区间的平均散热代替结晶潜热和第三类对流传热边界条件,使用MATLAB对高密度聚乙烯(PE-HD)GAIM冷却过程进行了数据模拟;通过实验测定了不同注射氮气压力下的流速并验证模拟温度场。结果表明:冷却温度场的模拟和实测值基本吻合,其模拟结果对于制件多层次结构的预测和气辅工艺参数的优化有重要的指导意义。In this paper, temperature distribution of cooling stage of GAIM was studied via numerical simulation. Under some reasonable assumptions during the cooling stage of GAIM, the temperature distribution of PE-HD parts was studied via the numerical simulation using software package MATLAB, which used the average heat instead of crystallization latent heat in crystallization temperature interval and the boundary condition was second category of convective heat transfer boundary condition. The velocity of N2 with different pressure was determined and the simulated temperature field was verified by experiment. The experimental results showed that the simulation value of cooling temperature field was consistent with experiment value.

关 键 词：气体辅助注射成型 注射气体流动模式 持续氮气注入 温度分布 数值模拟 

分 类 号：TQ320.662[化学工程—合成树脂塑料工业]