Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Measuring a weight or volume
Patent
1990-09-21
1991-05-07
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Measuring a weight or volume
264 67, 264 86, 264154, 264219, 264301, 264302, 264333, 264338, 425 84, B28B 126, B28B 736, B28B 1112, B29C 4118
Patent
active
050135007
ABSTRACT:
Novel processes have been developed by the present invention for producing hollow ceramic articles. Such ceramic articles are produced by using a water-absorbable mold having water non-permeable faces on an inner surface of the mold at locations corresponding to valve holes. The thickness of a ceramic layer deposited on the inner surface of the mold is controlled by measuring an amount of a lowered liquid surface level of the slurry near a slurry-pouring opening of the mold. Open ends of a hollow ceramic article are formed by cutting corresponding closed ends after deposition of the slurry and firing. A uniform thickness of a slurry deposited onto the inner surface of the mold can be attained by rotating the mold around an arbitrary rotary axis at a rotation speed of 1 to 60 rpm. All ceramic material contained in the slurry fed inside the mold may be deposited on the inner surface of the mold while the mold is being rotated or swung.
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Hamanaka Toshiyuki
Harada Takashi
Hattori Fumio
Kutach Karen D.
NGK Insulators Ltd.
Silbaugh Jan H.
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