引发挤出畸变的扰动源位置及扰动性质分析  

Analysis of the Trouble Origins of Melt Flow in Extrusion

作　　者：吴其晔[1] 李鹏[1] 王宁[1] 刘祥贵[1] 

机构地区：[1]青岛科技大学高分子科学与工程学院,山东青岛266042

出　　处：《现代塑料加工应用》2013年第5期55-59,共5页Modern Plastics Processing and Applications

基　　金：国家自然科学基金(50973050;50273016;50573037)资助

摘　　要：依据对挤出畸变的指纹识别,分析了引发挤出畸变的流场扰动源位置和扰动性质。结果表明:畸变发生在口模外,扰动源却在口模内。具体扰动位置有口模入口区、出口区及熔体-模壁边界处;扰动性质按流体动力学方程分为剪切流扰动、拉伸流扰动及压力流扰动。建立了不同类型畸变与扰动源位置、扰动性质的对应关系。The locations and mechanisms of melt flow trouble origins in extrusion were analysed according to the fingerprint identifications of extrudate distortions. The results show that the extrudate distortions occur outside the die, but the trouble origins are located inside the die, e.g. at die inlet, at die exit and at the boundary of melt and die wall. The trouble mechanisms can be summarized as the shear flow trouble, the draw flow trouble and the pressure flow trouble. The correspondences of different dis- tortions with the locations and mechanisms of melt flow trouble origins are established.

关 键 词：挤出畸变 流场 扰动源 扰动性质 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]