Process for mixing and extruding ceramic materials

Details Process for mixing and extruding ceramic materials Process for mixing and extruding ceramic materials

1984-04-26

1985-11-05

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264 60, 2642098, 264323, 425204, B29B 110

Patent

active

045512957

ABSTRACT:
This invention is directed to the making of ceramic articles through extrusion utilizing a self-cleaning, intermeshing, co-rotating, twin screw extrusion apparatus. The invention is particularly directed to the extrusion of honeycomb structures wherein the batch consists of cordierite or cordierite-mullite compositions with water and a hydroxypropyl cellulose binder/plasticizer having a viscosity at 20.degree. C. in a 2% aqueous solution between 25,000-100,000 centipoises. Preferably, the hydroxypropyl cellulose will have a viscosity of at least 50,000 centipoises such as to permit a working temperature during operation of the extrusion apparatus of at least 40.degree. C.

REFERENCES:
patent: 3917782 (1975-11-01), Holcombe et al.
patent: 4411856 (1983-10-01), Montierth
patent: 4428758 (1984-01-01), Montierth
patent: 4432918 (1984-02-01), Paisley

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