Apparatus for preventing air from contacting molten metal during

Details Apparatus for preventing air from contacting molten metal during Apparatus for preventing air from contacting molten metal during

1984-08-02

1986-03-18

Rolla, Joseph J.

Dispensing

Molten metal dispensing

Flow controllers or assists

222152, B22D 4108

Patent

active

045763178

ABSTRACT:
A sliding closure unit includes at least two refractory plates having therethrough discharge openings, the plates abutting on respective planar sliding surfaces. A generally U-shaped recess is formed in each sliding surface, each recess including a pair of free arms extending toward the other recess. The recesses are dimensioned such that, when the plates are in the open position thereof, the arms of the recesses overlap, thereby forming a connected recessed area encircling the discharge openings. One of the plates has therethrough a channel opening into the recessed area and adapted to be connected to a vacuum source, thereby making it possible to prevent air from contacting molten metal being discharged through the discharge openings.

REFERENCES:
patent: 3523684 (1970-08-01), Cuscino et al.
patent: 3887117 (1975-06-01), Fehling
patent: 3946907 (1976-03-01), Berve
patent: 4076153 (1978-02-01), Tinnes
patent: 4365731 (1982-12-01), Fehling et al.

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