Extrusion of metal honeycombs

Details Extrusion of metal honeycombs Extrusion of metal honeycombs

1994-10-20

1995-11-14

Walsh, Donald P.

Powder metallurgy processes

Forming articles by uniting randomly associated metal particles

Consolidation of powders

419 5, 419 7, 419 35, 419 61, 425110, B22F 702, B29C 4700

Patent

active

054664152

ABSTRACT:
Thick-skinned extruded metal honeycomb structures, and a method and apparatus for making them, are disclosed wherein a plasticized powder metal extrusion batch is extruded though a die assembly comprising a die and annular mask, the mask having a central outlet for extrusion of the skin and honeycomb core and an extrudate reservoir adjacent the central outlet, the die and mask cooperating to form a skinforming gap fed by the die and by the extrudate reservoir, such that batch material supplied from the reservoir and directly from the die combines to form a thickened outer skin which is integral with, and resistant to separation from, the honeycomb core.

REFERENCES:
patent: 4075270 (1978-02-01), Cunningham
patent: 5194719 (1993-03-01), Merkel et al.
patent: 5219509 (1993-06-01), Cocchetto et al.
patent: 5240396 (1993-08-01), Bremyer

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