Patent ID: 6474969
Filing Date: 2002-11-05
Classification: B29B,B29C,Y10S

Abstract:
An extrusion die assembly for use in an underwater pelletizer having an extruder and a water chamber, said die assembly comprising:a) a die plate having an upstream extruder face and a downstream cutting face; b) an inner annular groove formed in one face of said die plate; c) an outer annular groove formed in one face of said die plate; d) a plurality of spaced-apart extrusion orifices extending through said die plate from said extruder face to said cutting face, said orifices arranged in a pattern occupying a space between said inner and outer annular grooves; e) a coiled heating element conned within each of said inner and outer annular grooves, said coiled hearing elements having leads extending outwardly from said die plate for connection to an electrical source; and f) a die cone attached to the central portion of said extruder face of said die plate, said die cone covering and enclosing said inner annular groove but not said extrusion orifices.