# US 7,611,666 B2 · Tundish dry vibratable form

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- Number: US 7,611,666 B2
- Document ID: US7611666B2
- Status: Granted
- Kind: B2
- Application number: 12/027,565
- Filed: 2008-02-07
- Published: 2009-08-13
- Granted: 2009-11-03
- Earliest claimed: 2008-02-07
- Assignees: North American Refractories Co.
- Inventors: Teacho Cercone
- Web page: https://patentgrep.com/patent/US7611666B2

## CPC

- B22D 41/02: Linings
- B22D: CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES (shaping of plastics or substances in a plastic state B29C; metallurgical processing, selection of substances to be added to metal C21, C22)

## Abstract

A mold dimensioned to be positioned within a refractory-lined tundish. The mold has an upper wall and a side wall extending downwardly from the upper wall, the side wall having a shape generally conforming to the shape of the internal cavity of the tundish and having a lower end formed to rest on the refractory lining on the bottom wall of the refractory-lined tundish. The upper wall and side wall define an interior chamber. The side wall of the mold and the refractory lining on the sloping wall of the tundish form a gap therebetween. The gap extends around the mold, the mold being dimensioned such that the gap between the side wall of the mold and the refractory lining on the side wall of the tundish is wider at an upper portion of the internal cavity than at a lower portion of the cavity. A heating means extends through the upper wall of the mold for heating the interior chamber of the mold.

## Claims

### Claim 1

In a refractory-lined tundish for holding molten metal, said tundish having a metal shell with a bottom wall and a sloping side wall that define an internal cavity having a predetermined shape, and said tundish having a lining of refractory material on said metal shell, a device for forming a hot-face refractory layer on said refractory lining, said device comprised of:
a mold dimensioned to be positioned within said refractory-lined tundish, said mold having an upper wall and a side wall extending downwardly from said upper wall, said side wall having a shape generally conforming to the shape of said internal cavity of said tundish and having a lower end formed to rest on said refractory lining on the bottom wall of said refractory-lined tundish, said upper wall and side wall defining an interior chamber, said side wall of said mold and said refractory lining on said sloping wall of said tundish forming a gap therebetween, said gap extending around said mold, said mold being dimensioned such that said gap between said side wall of said mold and said refractory lining on said side wall of said tundish is wider at an upper portion of said internal cavity than at a lower portion of said cavity, said mold including spaced-apart slots formed in said lower end of said side wall, said slots dimensioned to receive ends of a dam wall disposed in said tundish, said mold also including flexible seal elements disposed along each side of each of said slots to sealingly engage sides of said dam wall when said mold is disposed in said tundish, and
a heating means extending through said upper wall of said mold for heating the interior chamber of said mold.

### Claim 2 (depends on 1)

A mold as defined in claim 1, wherein said heating means included inlet ports connectable to a source of heated gas, said inlet ports communicating with said interior chamber of said mold to heat said side wall of said mold and the bottom of said tundish.

### Claim 3 (depends on 2)

A mold as defined in claim 2, wherein said mold included outlet ports communicating with said interior chamber for venting the heated gas therefrom.

### Claim 4 (depends on 1)

A mold as defined in claim 1, wherein a movable plate is disposed at the upper end of each of said slots, said plate having a lower edge dimensioned to engage an upper surface of a dam wall in said tundish when said mold is disposed in a tundish.

### Claim 5 (depends on 1)

A mold as defined in claim 1, wherein said flexible seal elements extend into the openings defined by said slots.