入口半径为参数的衣架式模头设计及数值验证  

Design of Coat-Hanger Die with Entrance Radius as Parameter and Its Numerical Verification

作　　者：王和慧[1] 朱文敏[1] 王朝平[2] 陆磐谷[2] 司元祥[2] 

机构地区：[1]华东理工大学机械与动力工程学院,上海200237 [2]高桥石油化工公司,上海201208

出　　处：《塑料》2016年第2期101-105,共5页Plastics

摘　　要：以歧管入口半径为参数,根据模头内从入口到出口各个流线上压力降相等为准则推导出衣架式模头流道的结构尺寸方程。将用UG建立的不同歧管入口半径的流道导入ICEM中划分结构网格,然后在Polyflow有限元软件中进行数值模拟以验证方程的正确性。结果表明:模头流道内的压力和出口处速度均得到了均匀分布,并且在一定范围内歧管入口半径的增加能够显著地降低流道内熔体的压力降,而对出口速度均匀分布及滞留区大小的影响却很小。该方法可为设计人员提供参考。Coat-hanger die cave structure equations were deduced with manifold entrance radius as parameter in accordance with the principle of uniform pressure drop of each streamline. The structure equations were verified by the method of numerical simulation which was done by finite element software Polyflow with structured grid meshed by ICEM, and the models used in the simulation were modeled by UG. The results showed that the uniform pressure distribution in the die eaves and uniform velocity distribution on the outlets were obtained, the increase of radius in certain range could decrease pressure drop dramatically, while had little influence on the uniformity of outlet＇ s velocity and stagnation zone. The work provided design guidance for die designers.

关 键 词：衣架式模头 歧管入口半径 压力降 ICEM POLYFLOW 

分 类 号：TQ330.41[化学工程—橡胶工业]