Method for machining extrusion dies

Details Method for machining extrusion dies Method for machining extrusion dies

1998-01-07

1999-12-07

Valentine, Donald R.

Electrolysis: processes, compositions used therein, and methods

Electrolytic erosion of a workpiece for shape or surface...

With programmed, cyclic, or time responsive control

205665, 26417712, 425463, B23H 914, B29C 4100, A01J 2100

Patent

active

059977205

ABSTRACT:
In a metal honeycomb extrusion die which incorporates apertures for the conveyance of extrudable material through the die body toward a discharge opening in the face of the die, the aperture sidewalls are shaped by electrochemical machining or the like to develop a periodically varying aperture size, surface shape or surface finish, superimposed on the conventional randomly varying machined aperture sidewall surface, in order to reduce the adverse effects of random surface variations on extrusion process stability and extruded product quality.

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