Coated pelletizing extrusion dies and method for making the same
AssigneeKennametal Inc.
InventorsSudhir Brahmandam, Dave Siddle, Irene Spitsberg
Life of this patent
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Abstract
A pelletizing extrusion die comprising a die body contains a plurality of extrusion holes. Each of the extrusion holes is defined by a defining surface of the die body wherein at least a portion of the defining surface has a low-friction coating deposited thereon. A method for applying the low-friction coating to the defining surface wherein the applying step occurs at a temperature equal to less than about 520° C.
Claims16
A pelletizing extrusion die comprising a die body containing a plurality of extrusion holes, and wherein each of the extrusion holes being defined by a defining surface of the die body wherein at least a portion of the defining surface having a low-friction coating deposited thereon.
A pelletizing extrusion die comprising a die body containing a plurality of extrusion holes, and wherein each of the extrusion holes being defined by a defining surface of the die body wherein the defining surface having a low-friction coating deposited thereon.
A method of coating a defining surface of a pelletizing extrusion die body contains a plurality of extrusion holes, and wherein each of the extrusion holes being defined by the defining surface of the die body, the method comprising the steps of:
- applying a low-friction coating to at least a portion of the defining surface at a temperature equal to less than about 520° C.
Dependencies are inferred from the claim text.