摘要
为研究注射料的流动性和模腔形状的复制能力,加工了含有微流道的模具,在微注射系统上进行了微注射实验.应用基于矢量化显式算法的程序,在不同壁面边界条件下,对微注射实验进行了模拟.结果表明:在注射料温度220℃、模具温度40℃、注射流量为20 mm3/s、注射时间1 s、保压时间10 s的注射工艺条件下,聚丙烯能较好的复制长5 mm,宽1.5 mm和厚0.8 mm的微流道形状.采用滑移边界条件的微注射模拟结果与实验结果一致,说明微注射中存在边界滑移速度.
Experiment and simulation were performed to study the feedstock fluidity and replication ability of micro-mould cavity.The experiment was conducted with a specially designed mould on a micro-injection system.The experimental results show that micro-injection parts in a size of 5 mm×1.5 mm×0.8 mm were well replicated under the following injection parameters： the temperatures of polypropylene feedstock and the mould were 220 ℃ and 40 ℃,respectively,the injection flow and time were 20 mm3/s and 1 s,respectively,and the pressure holding time was 10 s.The simulation was performed with different wall boundary conditions using a self-developed simulation program that is based on the fully vectorial explicit algorithm.The simulation results under the wall slip conditions agreed reasonably with those of the experiment,verifying the existence of wall slip.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2010年第4期635-638,共4页
Journal of Southwest Jiaotong University
基金
国家自然科学基金资助项目(10772154)
高等学校博士点专项科研基金新教师基金资助项目(20070613021)
中央高校基本科研业务费专项资金资助(SWJTU09CX067)
关键词
微注射成形
实验
数值模拟
壁面边界条件
micro-injection moulding
experiment
numerical simulation
wall boundary condition
