Plastic and nonmetallic article shaping or treating: processes – Including step of generating heat by friction
Patent
1974-10-03
1976-11-09
Hoag, Willard E.
Plastic and nonmetallic article shaping or treating: processes
Including step of generating heat by friction
264165, 264171, 264175, 264216, 264310, 264313, B28B 130, B28B 500
Patent
active
039911497
ABSTRACT:
In the manufacture of ceramic substrates by the tape casting process, improved control of thickness variations in the "green" ceramic tape is achieved by using a free-riding roller positioned within a drying chamber at a preselected location at which the cast slip has formed a dry skin yet remains fluidly deformable. The roller pressure is adjusted to a value just sufficient to redistribute the surface of the cast slip into a straight line without changing the cross-sectional area of the tape along the line of roller contact to avoid "bubble" buildup ahead of the roller and rupture of the surface skin.
REFERENCES:
patent: 1477663 (1923-12-01), Poston
patent: 1559948 (1925-11-01), Farris
patent: 2665450 (1954-01-01), Lindquist
patent: 2712154 (1955-07-01), Lindquist
patent: 2966719 (1961-01-01), Park
patent: 3002249 (1961-10-01), Jackson
patent: 3346359 (1967-10-01), Forster et al.
patent: 3398224 (1968-08-01), Spencer
patent: T866029 (1969-09-01), Lowe
Schat et al., "Calendering as a Method of Forming Thin Ceramic Sheets", Proc. Brit. Ceram. Soc., 18 Aug. 1970, pp. 281-292, relied on.
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