Methods and apparatus for making honeycomb extrusion dies

Details Methods and apparatus for making honeycomb extrusion dies Methods and apparatus for making honeycomb extrusion dies

1995-05-15

1997-05-20

Evans, Geoffrey S.

Electric heating

Metal heating

Cutting or disintegrating

219 6914, B23H 110, B23H 702, B23H 900

Patent

active

056309511

ABSTRACT:
A steel honeycomb extrusion die having an array of feedholes extending into a die inlet face and intersecting with an array of discharge slots on the die discharge face is made by a process wherein the slots are cut into blind feedholes by wire EDM slotting while dielectric fluid is provided in or flushed through the feedholes. The resulting improvements in EDM process stability reduce the number of wire electrodes broken during machining of the array, and in feedhole/slot intersection configuration and finish, provide dies with improved extrusion performance and extended service life.

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patent: 5320721 (1994-06-01), Peters
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