Herbert W. Müllner

Numerical Prediction of the Dimensioning of Tools for the Extrusion Process of Rubber Profiles

In this contribution numerical simulations of realistic extrusion tools will be presented. Generally, the geometry of the desired rubber profile cannot be used for the dimensioning of the tool. The shape of the corresponding tool under consideration of the material behavior needs to be predicted. Therefore, simulations were performed with the finite element based CFD program POLYFLOW under usage of an inverse calculation approach. The underlying material parameters will be provided by a material characterization which is based on capillary‐experiments in combination with extrudate swell measurements. Thus, more realistic simulations of the extrudate swell phenomenon and its influence on the resulting profile geometry are possible. The experimental validation of the new characterization method will be done by means of numerical simulations of the capillary‐experiment.