Process for mixing and extruding ceramic materials

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

B - Operations, Transporting

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B

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B28B 3/22 (2006.01) B29C 47/00 (2006.01) B29C 47/38 (2006.01) C04B 35/636 (2006.01) C04B 38/00 (2006.01)

Patent

CA 1260234

Abstract of the Invention 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°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°C.

474082

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