TY - JOUR TI - The systematical design of plastic spiral extrusion dies and validation of the design methodology by CFD analyses AU - YILMAZ, O. AU - GÖREN, G. AU - BALABAN, M. AU - KIRKKÖPRÜ, K. JO - Sigma Journal of Engineering and Natural Sciences PY - 2013 VL - 31 SP - 335 EP - 349 DO - ER -