Temperature profiles of molten flowing polymers in a channel die

Karkri, M.1, Jarny, Y.2, Mousseau, P.3, Poncet, E.1
1 CNRS UMR 6174 Institut FEMTO-ST - Département CREST, Belfort France
2 UMR CNRS 6607 Ecole Polytechnique de l’Université de Nantes, France
3 UMR CNRS 6144 IUT de Nantes, France

Extrusion is one of the important manufacturing methods in many industries. In order to obtain the desired product quality and characteristics, the knowledge of the thermal state of the die is very important.

In the present study, a two-dimensional conjugate heat transfer model has been developed for non-Newtonian materials being processed in the extrusion die. The modeling equations for the fluid flow in the channel as well as for the heat flow within the melted polymer and the wall regions are solved simultaneously, using FEMLAB software.

The melted polymer is considered as an incompressible pseudo-plastic fluid and the flow is assumed steady and laminar. The aim of this work is to understand the thermal state of a plate extrusion die by the knowledge of the evolution of the thermal field in the channel and in the wall. The results obtained demonstrate the robustness, of FEMLAB.