微轮廓挤出成型研究  

RESEARCH ON MICROPROFILE EXTRUSION

作　　者：王洪[1,2] 傅志红[3] Yao Donggang 

机构地区：[1]广东高校半导体照明工程技术研究中心,广州510640 [2]华南理工大学理学院,广州510640 [3]中南大学机电工程学院,长沙410083 [4]School of Polymer, Textile ＆ Fiber Engineering, Georgia Institute of Technology, Atlanta 30332, USA

出　　处：《工程塑料应用》2009年第9期49-51,共3页Engineering Plastics Application

基　　金：广东省教育部产学研结合项目(2007B090400013);广州市科技攻关重点项目(2007Z2-D9101)

摘　　要：在毛细管流变仪上对微轮廓的挤出成型过程中的形变进行了实验研究,所采用的微轮廓口模孔分别为三叶形和椭圆形,试验原材料为纤维级聚丙烯。结果表明,在微轮廓的挤出成型中,挤出物轮廓形状发生了明显的变化,微轮廓尺寸随挤出速度的增加而增大,随挤出温度的升高而增大,随拉伸速度的增加而减小;采用水冷却有利于减小形变;三叶形轮廓的叶片在宽度方向的形变要远大于长度方向,椭圆形轮廓的形变在短轴方向大于长轴方向。The shape change of microprofile in extrusion was investigated using a capillary rheometer. The shapes of die orifice were trilobal and elliptical respectively, and the material was fiber-grade polypropylene. The research result showed that during the extrusion of microprofile, the shape of extrudate deviated greatly from the die orifice. The size of extrudate was increased with the increasing of extruding speed and temperature, while it was decreased with the increasing of drawing speed. Water-cooling was benefit for reducing shape change. Shape change of trilobal leaf in direction of width was much larger than that in the direction of length, and the shape change in the direction of minor diameter was larger than in the direction of major diameter.

关 键 词：微挤出 聚合物微加工 形变 机头口模孔 

分 类 号：TQ320.663[化学工程—合成树脂塑料工业] TP391.41[自动化与计算机技术—计算机应用技术]