摘要
对新型聚合物叶片注塑成型机中的屏障混炼塑化单元进行了三维建模,采用网格重叠技术对流体区域进行网格划分。通过对轴向压力分布以及偏心距与剪切速率、拉伸速率关系的研究,分析了该单元成型加工聚合物输送特征。结果表明:新型屏障混炼塑化单元具有良好的正位移输送能力,有利于聚合物熔体的塑化混合,其中由转子转动产生的空隙体积的变化是屏障混炼塑化单元产生拉伸流场的主要原因;随着偏心距的增大,屏障混炼塑化单元的剪切速率和拉伸速率均增大,拉伸流场的作用增强,从而在剪切流场的基础上实现了强拉伸流场。
Three-dimensional model of barrier blending-plasticizing unit for a novel polymer vane injection molding machine was established. Using grid overlapping technique to mesh fluid region, and the polymer transportation characteristics of the unit during the processing was analyzed through the study of axial pressure distribution, and the relation of shearing rate, tensile rate with eccentricity. The results show that the novel barrier blending-plasticizing unit is of better positive displacement transportation ability and suitable to plasticizing and mixing of the polymer melt. The gap volume variation produced by rotor is the main reason causing tensile flow field in barrier blending-plasticizing unit. With the increasing of eccentricity, the shearing rate and tensile rate in barrier blending-plasticizing unit increase, the action of tensile flow field strengthens, and strong tensile flow field is realized on the basis of shearing flow field.
出处
《塑料科技》
CAS
北大核心
2014年第1期106-109,共4页
Plastics Science and Technology
基金
广东省自然科学基金资助项目(S2011010000411)
关键词
屏障混炼塑化单元
成型加工
输送特征
Barrier blending-plasticizing unit
Processing
Transportation characteristics
