Ceramic orifice ring

Details Ceramic orifice ring Ceramic orifice ring

1989-08-18

1990-08-21

Woodard, Joye L.

Glass manufacturing

Molten glass dispensing means

Discharge orifice below melt level

6537411, 6537412, 6537413, 222591, C03B 526, C03B 7088

Patent

active

049503219

ABSTRACT:
An orifice ring insert formed of a heat resistant metal such as 50-50 nickel-chrome alloy is dropped into position within the orifice opening in the ceramic orifice ring. The ring is counterbored to receive the flange of the ring with sufficient clearance to permit expansion. A lock nut is threaded to the lower end of the insert. The lock nut has a slope to its upper surface that contacts the bottom of the ceramic orifice ring. This slope takes into consideration the relative thermal expansion rates of the metal insert and ceramic orifice member. The nut stays tight during operation but does not crack the ceramic.

REFERENCES:
patent: 2190296 (1940-02-01), Richardson

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