钢塑共挤模具分流段成形过程数值模拟

NUMERICAL SIMULATION OF PROFILE CO-EXTRUSION PROCESS OF SPLIT-FLOW PART OF POLYMER WITH METAL INSERT

以聚合物挤出过程模拟的罚有限元模型为基础,采用VC++语言自主开发了模拟软件,对Carreau流体在钢塑共挤模具分流段的流动过程进行模拟,获得模具内聚合物熔体的三维速度场分布,采用SUPG方法求解能量方程,在对流项占优的情况下获得温度场的分布,分析不同体积流量对速度的影响。结果表明实例分析给出钢塑共挤模具内流场的一般规律对模具设计具有一定的指导意义。

The mathematic model of the co-extrusion of polymer with metal insert is established by using the penalty finite element method. The simulation program is coded and a co-extrusion process of polymer of Carreau fluid with metal insert is simulated. The distribution of the three-dimensional velocity field of polymer in die cavity is obtained. Through solving the energy equation by SUPG formulation, the temperature field of polymer is obtained while the convective term dominates in energy equation. The influence of various volume fluxes on the velocity field of the polymer is studied. The result shows that the analysis of the example gave the common rule of the co-extrusion process of polymer with metal insert. The simulation results supplied theoretical guidelines for the process and mould design of the co-extrusion of polymer with metal insert.