Extrusion-forming jig

Details Extrusion-forming jig Extrusion-forming jig

1988-02-18

1989-05-30

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

Single inlet, plural shaping orifices

164138, 26417711, 26417712, 425DIG29, 427 35, 427 37, B29F 304

Patent

active

048346403

ABSTRACT:
An extrusion-forming jig for extruding a ceramic batch to regulate a sectional shape and external dimensions of a honeycomb structure is formed by the extrusion. The jig includes electric discharge coating layers on surfaces of the jig contacting the ceramic batch. The electric discharge coating layers are made of a cemented carbide such as tungsten carbide. The jig is able to be used for many hours without necessitating replacement.

REFERENCES:
patent: 3905743 (1975-09-01), Bagley
patent: 3912827 (1975-10-01), Komatsu et al.
patent: 4322922 (1982-04-01), Gilliam
patent: 4551603 (1985-11-01), Rocklin
patent: 4653996 (1987-03-01), Ozaki et al.
Krainer, E.; Schindler, A.; Stuhl, J. Metall, 27(2), 121-6, 1973.

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