Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 0-89116-909-1

International Heat Transfer Conference 9
August, 19-24, 1990 , Jerusalem, Israel

NUMERICAL SIMULATION OF SHEET EXTRUSION COOLING USING CHILLING ROLLS

Get access (open in a dialog) DOI: 10.1615/IHTC9.1450
pages 353-358

Abstrakt

Often throughput in sheet extrusion of polymer melts is limited by the ability to cool the extrudate. Chilling rolls are used to create effective heat transfer (cooling) and their design is of great importance in the polymer processing industry. The Finite Element Method (FEM) is used to numerically simulate the flow and heat transfer of a polymer sheet melt of a typical polyethylene being rolled between two chilling cylinders. For a given roll temperature and using the melt viscosity, specific heat, heat of fusion and entering melt temperature, the heat to be removed from the polymer is calculated for a given roll size and minimum gap. The results show whether the chilling rolls are undersized or not and can be used for design purposes to improve heat transfer and increase throughput.