METHOD OF COOLING MATERIAL USING AN EXTRUDER SCREW CONFIGURED FOR IMPROVED HEAT TRANSFER

摘要

A method of cooling material in a screw extruder having a barrel including providing at least one extruder screw having a central shaft. The at least one extruder screw includes at least one screw flight including at least one interruption in the screw flight to form at least one discontinuity by which a portion of the screw flight is circumferentially displaced from the remainder of the screw flight. Material is turned from near the central shaft outwards toward the inner surface of the screw extruder barrel through the at least one discontinuity.