Rotary extruder with internally cooled rotor

摘要

A rotor assembly for use in a rotary extruder, comprising a rotor rotatably mounted inside a barrel by means of drive and free end bearing assemblies; a coaxial longitudinal bore extending into the rotor from its free end; a sleeve within the bore defining a thermally insulated central zone disposed radially inward from the plasticizing surface of the rotor, and cooling zones disposed at each end of the sleeve radially inward from the drive and free end bearing assemblies; a conduit disposed within the sleeve defining a longitudinally extending annulus therebetween; and rotatable means providing fluid communication between a coolant inlet and the interior of the conduit, and between the longitudinally extending annulus and a coolant outlet.