摘要
微纳层叠挤出技术通过对高聚物材料微观形态进行调控来提高多方面的性能,例如力学、阻隔性能等。针对目前微纳层叠挤出技术中层叠模具单位体积内层叠单元较少,流量较低的情况,提出了一种将层叠单元进行环向布置的创新设计思想。设计了用于环向布置的层叠单元流道结构,并提出了模具内单组层叠单元环向布置与多组层叠单元环向布置的具体方案。设计表明,在相同体积下该结构可以布置更多的层叠单元,流量是传统设计的4倍。同时,流道长度为传统设计的60%。利用Polyflow软件对层叠单元的流道进行了数值模拟,结果表明流道压力和速度分布均匀,整体压力降较低。
Micro-layer extrusion technology could improve several properties including mechanical and barrier properties by adjusting the micro-morphology of polymer materials. In view of the situation that the present mold used for micro-layer extrusion technology had few laminated unit amount in unit volume,a novel annular laminated mold used for micro-layer extrusion technology was introduced. The runner of the laminated unit used for annular arrangement was designed,the annular arrangement used for single set of laminated unit and multiple sets of laminated unit were introduced. The design shows that the new structure contains more laminated units and the melt flux is four times of the traditional design under the same mold volume. The flow field analysis of laminated unit based on Polyflow is performed,the results reflect that the pressure and velocity distribution of the laminated unit runner are uniform,the pressure drop along the extrusion direction is low.
作者
袁擘
焦志伟
刘东升
杨卫民
伍先安
YUAN Bo;JIAO Zhi-wei;LIU Dong-sheng;YANG Wei-min;WU Xian-an(College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China)
出处
《塑料工业》
CAS
CSCD
北大核心
2019年第4期57-60,共4页
China Plastics Industry
基金
国家重点研发计划(2016YFB0302000)
