Jun 01, 1990 · Solving the Twin Screw Extrusion Configuration Problem - a Plasticating Modeling Program. R. Faria, J. Covas, A. Gaspar-Cunha. Materials Science. Co-rotating twin-screw extruders are widely used by polymer materials producers and compounders due to a number of interesting constructive and functional features. In fact, a broad range of polymer.