注塑工艺参数对聚丙烯塑料熔体表观黏度的影响  

Effect of Injection Process Parameters on PP Plastic Melt Apparent Viscosity

作　　者：权非 曹阳根[1] 张涛[1] 宁丹[1] 杨尚磊[1] 

机构地区：[1]上海工程技术大学材料工程学院,上海201620

出　　处：《轻工机械》2015年第3期14-16,共3页Light Industry Machinery

基　　金：国家自然科学基金资助(51075256)

摘　　要：为了研究注塑工艺参数对表观黏度的影响,利用内置在阿基米德螺旋线模具中的Kistler压力传感器,采集聚丙烯(PP)塑料注塑过程中的数据信号,通过CoMo Injection软件处理数据,得到熔体填充曲线。分析熔体填充曲线,利用压力差和时间差计算PP塑料熔体在假塑性区的表观黏度和表观剪切速率。结果显示,表观黏度随剪切速率的提高而降低,有明显的剪切变稀现象。熔体温度增加,模具温度升高和注塑压力加大同样能够降低表观黏度。In order to study the influence of the injection molding process parameters on the apparent viscosity,collected the data signals in the process of PP plastic injection molding by using the pressure sensor built-in the Archimedes spiral mould,obtained the melt filling curve by CoMo Injection software. The apparent viscosity and shear rate were calculated by analyzing the pressure difference and time difference in pseudoplastic area. The result shows the apparent viscosity decreases with the increase of shear rate,shear becomes thinning obviously. Increasing melt temperature,mold temperature and injection pressure can also reduce the apparent viscosity.

关 键 词：注塑工艺 聚丙烯 表观黏度 假塑性 

分 类 号：TH162[机械工程—机械制造及自动化]