Corning Incorporated
EXTRUSION APPARATUS FOR CERAMIC STRUCTURES AND HONEYCOMB FILTERS

Abstract:

An extruder that includes: an extruder barrel with an inlet end and a discharge end; a rotatable screw element disposed axially within the barrel with a screw inlet end proximate the inlet end and a screw discharge end proximate the discharge end of the barrel; a shaft extending axially through the screw element and comprising a central bore with an opening proximate to the inlet end of the barrel and extending through the shaft to a closed terminal end; and a coolant delivery conduit extending axially within the bore comprising a coolant inlet end proximate to the inlet end of the barrel and a coolant discharge end. The closed terminal end of the bore is located at a predetermined distance upstream from the screw discharge end. Further, the coolant discharge end is located within the bore and proximate to the closed terminal end of the bore.