AN OPTIMIZATION APPROACH FOR POLYMER SHEETING DIE DESIGN

摘要

An optimization approach for the polymer sheeting die design based on the finite element simulation and genetic algorithm was studied in this paper. The optimization model was established according to the flow balance principle where the outlet flow distribution uniformity was taken as the optimization object and the die structure parameters were the design variables. The results of FEM simulation on the polymer extrusion process were adopted for the calculation of the objective function. The genetic algorithm was used for the fitness evaluation and the search of optimal design variables. The above optimization approach is applied for the optimal design of a fish-tail sheeting die whose result shows that it's feasible and reasonable.