Plastic and nonmetallic article shaping or treating: processes – Formation of solid particulate material directly from molten... – By extrusion spraying or gravity fall through orifice
Patent
1996-05-28
1998-05-26
Derrington, James
Plastic and nonmetallic article shaping or treating: processes
Formation of solid particulate material directly from molten...
By extrusion spraying or gravity fall through orifice
264 63, 2643282, C04B 35115
Patent
active
057560153
ABSTRACT:
A method for producing a cylindrical ceramic body having a hollow portion and having an uneven thickness includes the steps of: granulating a ceramic material powder to obtain granules having an average diameter of 50-90 .mu.m and an apparent bulk density of 0.60-0.80 g/cm.sup.3 ; mixing a binder with the granules to obtain a molding material; subjecting the molding material to an injection molding under a pressure of 500 kg/cm.sup.2 or less to obtain a compact; removing a binder from the compact to obtain a binder-removed compact; and firing the binder-removed compact. The method can excellently mold and produce a cylindrical ceramic body which has a hollow portion therein, which is very thin, and which has an uneven thickness.
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Miyazawa Sugio
Ohashi Toshio
Derrington James
NGK Insulators Ltd.
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