气辅共挤成型机理的数值模拟研究  

Numerical Simulation of the Gas-assisted Co-extrusion

作　　者：蔡奎[1] 周国发[1] 屈娅嘉[1] 钟序光[1] 胡晨章[1] 

机构地区：[1]南昌大学环境科学与工程学院,江西南昌330029

出　　处：《中国塑料》2005年第4期57-61,共5页China Plastics

基　　金：国家自然科学基金(20274016)资助

摘　　要：基于气辅共挤成型特点,提出了其成型工艺,并建立了描述气辅共挤成型过程的理论模型,对其成型机理进行了数值模拟研究。研究结果表明:相对传统共挤成型而言,气辅共挤成型不仅能有效降低口模压降,而且能提高界面的稳定性。数值模拟的结果与国外的实验研究结论相吻合。A model of gas-assisted co-extrusion molding was formulated, from which the numerical simulation was carried out. The results of simulation showed a good agreement with the foreign experimental results. Based on the simulation, a set of technique for the gas-assisted co-extrusion was proposed. Compared with conventional co-extrusion, gas-assisted co-extrusion provided more effective pressure drop and higher interfacial stability.

关 键 词：气辅共挤成型 传统共挤成型 数值模拟 界面不稳定性 口模压降 

分 类 号：TQ320.663[化学工程—合成树脂塑料工业]