Patent ID: 6299430
Filing Date: 2001-10-09
Classification: B01J,B29B,B30B,Y10S

Abstract:
A pellet mill comprising:a ring die defining a die cavity, said ring die having an axis and circumferentially and axially spaced die openings;a carriage mounting a plurality of rollers in said die cavity, said rollers being mounted on shafts carried by said carriage and having axes parallel to said axis of the ring die;a feeder for supplying feed material into said die cavity;a drive for rotating one of said ring die and said carriage relative to another of said ring die and said carriage for extruding feed material in the nips between the ring die and the rollers through the die openings to form pellets;bearings disposed between said shafts and said rollers;cooling medium supply and return passages in each of said shafts generally parallel to said axes thereof; anda cooling medium inlet carried by each said shaft for supplying a cooling medium to said supply passage for cooling said bearings and a cooling medium outlet carried by each said shaft for receiving heated cooling medium from said return passage.