异型材挤塑口模的有限元设计

Design of a Die for Extrusion of the Plastics Profile with an Irregular Cross-section with FEM

用有限元方法和Matlab软件对挤出成型中的口模内熔体的二维非牛顿等温流动进行了数值模拟,在基于流率平衡的原则的基础之上,提出了异型材口模成型段的有限元设计方法.本文虽然是以矩形和圆环形组合异型材口模作为示例,但设计原则可应用于其它的各种类型的异型材口模.

By means of finite element method (FEM) and Matlab,the two-dimensioned non-Newtonian and isothermal plastics melt flow in a die for extrusion of the plastics profile with an irregular cross-section was numerically simulated.On the basis of equality of flow rate,a FEM way was proposed to design the die land.Also the cross-section of conjunction of a rectangular and annular was adopted for a case study.