Abstract

In this study, three different die geometries were selected to understand the die characteristics in the film casting extrusion processes. First, large and small-scale T-dies were numerically simulated to observe the scaled-down effect on the flow inside the dies. Second, three different dies–keyhole, linear tapper coat-hanger die (LTCD), and curved tapper coathanger die (CTCD)–were numerically observed and discussed according to the mass flow rate. Finally, the die exit velocity profiles and die characteristics were observed and discussed based on the power-law index for the LTCD die. These numerical simulations and numerical data will aid the optimization of the die design in industrial fields.

Keywords: numerical simulation;extrusion;die characteristics;die design;T-die;LTCD;CTCD;Keyhole Die