Patent US4484614A successfully refreshed from Google Patents.
US4484614A
Expired / Lapsed
US
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Method of and apparatus for strip casting
Assignee: Allegheny Ludlum Steel Corp
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Filing: 1982-07-06
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Granted: 1984-11-27
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Expires: 2002-07-06
Abstract
Abstract An apparatus for continuously casting strip material onto a casting surface includes a tundish for receiving and holding molten metal having a nozzle therein. The nozzle comprises an orifice passage defined between a first inside surface and a second inside surface, wherein at least a portion of at least one inside surface comprises an insert disposed against the tundish. A nozzle gap of at least 0.010 inch is maintained, an outer portion of the insert is able to be disposed to within 0.120 inch of the casting surface, and at least a portion of the outside surface of the tundish at the orifice of the nozzle is able to be disposed to within at least about 0.020 inch of the casting surface.
Inventors
- 👤 Robert E. Maringer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:55
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/06; B22D11/005
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
138 words
An apparatus for continuously casting strip material comprising: a tundish for receiving and holding molten metal having a nozzle therein through which molten metal is delivered to a casting surface movable past the nozzle at a speed of from 200 to 10,000 linear surface feet per minute, said nozzle comprising a longitudinally extending orifice passage having substantially uniform cross-sectional dimensions throughout a longitudinal extent thereof, defined between a first inside surface and a second inside surface, an insert disposed in the tundish and movable relative to the tundish, said insert forming at least a portion of one of said inside surfaces, and a minimum gap of at least about 0.010 inch is maintained between said inside surfaces, and said insert having a front edge surface thereof above to be disposed to within 0.120 inch of the casting surface.
Claim 2
Independent Claim
138 words
An apparatus for continuously casting strip material comprising: a tundish for receiving and holding molten metal having a nozzle therein through which molten metal is delivered to a casting surface movable past the nozzle at a speed of from 200 to 10,000 linear surface feet per minute, said nozzle comprising a longitudinally extending orifice passage having substantially uniform cross-sectional dimensions throughout a longitudinal extent thereof, defined between a first inside surface and a second inside surface, an insert disposed in the tundish and movable relative to the tundish, said insert forming at least a portion of one of said inside surfaces, and a minimum gap of at least about 0.010 inch is maintained between said inside surfaces, and said insert having a front edge surface thereof above to be disposed to within 0.120 inch of the casting surface.
Claim 3
Dependent Claim
30 words
An apparatus as set forth in claim 1 wherein the insert is reciprocal toward and from the casting surface on an outside surface of a front wall of the tundish.
Claim 4
Dependent Claim
19 words
An apparatus as set forth in claim 1 wherein the tundish is reciprocal toward and from the casting surface.
Claim 5
Dependent Claim
39 words
An apparatus as set forth in claim 1 wherein pressure is exerted against the insert sufficient to overcome the counter pressure of molten metal bearing against the surface of the insert forming an inside surface of the orifice passage.
Claim 6
Dependent Claim
19 words
An apparatus as set forth in claim 4 wherein the pressure is provided by a weight on the insert.
Claim 7
Dependent Claim
22 words
An apparatus as set forth in claim 4 wherein the pressure is provided by a spring biased device bearing against the insert.
Claim 8
Dependent Claim
20 words
An apparatus as set forth in claim 4 wherein the pressure is provided by clamping the insert to the tundish.
Claim 9
Dependent Claim
17 words
An apparatus as set forth in claim 1 wherein the insert is reciprocal in a lateral direction.
Claim 10
Dependent Claim
15 words
An apparatus as set forth in claim 8 wherein said lateral direction is generally horizontal.
Claim 11
Dependent Claim
15 words
An apparatus as set forth in claim 8 wherein said lateral direction is generally vertical.
Claim 12
Dependent Claim
17 words
An apparatus as set forth in claim 1 wherein the insert is reciprocal in an angular direction.
Claim 13
Dependent Claim
17 words
An apparatus as set forth in claim 1 wherein the insert is reciprocal in an arcuate direction.
Claim 14
Dependent Claim
23 words
An apparatus as set forth in claim 1 wherein said front edge surface of the insert has a length less than 0.16 inch.
Claim 15
Dependent Claim
25 words
An apparatus as set forth in claim 1 wherein said front edge surface of the insert has a length of from 0.02 to 0.06 inch.
Claim 16
Dependent Claim
29 words
An apparatus as set forth in claim 1 wherein the front edge surface of the insert substantially comprises a line across the tundish at a junction of the insert.
Claim 17
Dependent Claim
29 words
An apparatus as set forth in claim 1 wherein the front edge surface of the insert is able to be disposed to within 0.080 inch of the casting surface.
Claim 18
Dependent Claim
29 words
An apparatus as set forth in claim 1 wherein the front edge surface of the insert is able to be disposed to within 0.020 inch of the casting surface.
Claim 19
Dependent Claim
29 words
An apparatus as set forth in claim 1 wherein the front edge surface of the insert is able to be disposed to within 0.015 inch of the casting surface.
Claim 20
Dependent Claim
29 words
An apparatus as set forth in claim 1 wherein the front edge surface of the insert is able to be disposed to within 0.010 inch of the casting surface.
Claim 21
Dependent Claim
27 words
An apparatus as set forth in claim 13 wherein the front edge surface of the insert is in substantially complete parallelism with the casting surface during casting.
Claim 22
Dependent Claim
31 words
An apparatus as set forth in claim 1 wherein the insert is able to be tilted such that the front edge surface may be disposed toward or from the casting surface.
Claim 23
Dependent Claim
31 words
An apparatus as set forth in claim 1 wherein the insert may be canted such that end portions of the insert may be moved toward and from the casting surface, respectively.
Claim 24
Dependent Claim
87 words
An apparatus as set forth in claim 1 wherein said tundish comprises a front wall and a rear wall with respect to the casting direction, with each wall having inside and outside surfaces with respect to the molten metal holding portion of the tundish, and sidewalls enclosing the front and rear walls of the tundish wherein at least a portion of the outside surface of the rear wall, adjacent the orifice passage is able to be disposed to within at least 0.020 inch of the casting surface.
Claim 25
Dependent Claim
40 words
An apparatus as set forth in claim 23 wherein at least a portion of the outside surface of the rear wall, adjacent the orifice passage is able to be disposed to within at least 0.010 inch of the casting surface.
Claim 26
Dependent Claim
26 words
An apparatus as set forth in claim 1 wherein at least a portion of each inside surface forms part of an insert disposed in the tundish.
Claim 27
Dependent Claim
47 words
An apparatus as set forth in claim 1 wherein the tundish is constructed of a material selected from the group consisting of graphite, alumina graphite, clay graphite, quartz, fiberized kaolin, boron nitride, silicon nitride, silicon carbide, boron carbide, alumina, zirconia, stabilized zirconia silicate, magnesia and combinations thereof.
Claim 28
Dependent Claim
37 words
An apparatus as set forth in claim 1 wherein the insert is constructed of a material selected from the group consisting of boron nitride, silicon nitride, boron carbide, silicon nitride, silicon carbide, zirconia, quartz and combinations thereof.
Claim 29
Independent Claim
230 words
An apparatus for continuously casting strip material comprising: a tundish for receiving and holding molten metal, having a front wall and a rear wall with respect to the casting direction with each wall having inside and outside surfaces with respect to the molten metal holding portion of the tundish, said inside surfaces extending toward and forming an orifice passage through a nozzle through which molten metal is delivered to a casting surface movable past the nozzle at a speed of from 200 to 10,000 linear surface feet per minute, and sidewalls enclosing the front and rear walls of the tundish, an insert disposed against a portion of the outside surface of the front wall a segment of which forms at least a portion of the inside surface of the front wall, said insert movable relative to the tundish and extending beyond the front wall in the direction of the casting surface maintaining a minimum gap of at least 0.010 inch at the orifice passage defined between the inside surface of the rear wall and the insert, said insert having a front edge surface thereof able to be disposed to within 0.120 inch of the casting surface, with at least a portion of the outside surface of the rear wall adjacent the orifice passage of the nozzle able to be disposed to within at least 0.020 inch of the casting surface.
Claim 30
Independent Claim
230 words
An apparatus for continuously casting strip material comprising: a tundish for receiving and holding molten metal, having a front wall and a rear wall with respect to the casting direction with each wall having inside and outside surfaces with respect to the molten metal holding portion of the tundish, said inside surfaces extending toward and forming an orifice passage through a nozzle through which molten metal is delivered to a casting surface movable past the nozzle at a speed of from 200 to 10,000 linear surface feet per minute, and sidewalls enclosing the front and rear walls of the tundish, an insert disposed against a portion of the outside surface of the front wall a segment of which forms at least a portion of the inside surface of the front wall, said insert movable relative to the tundish and extending beyond the front wall in the direction of the casting surface maintaining a minimum gap of at least 0.010 inch at the orifice passage defined between the inside surface of the rear wall and the insert, said insert having a front edge surface thereof able to be disposed to within 0.120 inch of the casting surface, with at least a portion of the outside surface of the rear wall adjacent the orifice passage of the nozzle able to be disposed to within at least 0.020 inch of the casting surface.
Claim 31
Independent Claim
134 words
A method for continuously casting strip material comprising: providing a continuous surface upon which metal strip is cast from a molten metal holding tundish having a nozzle, the surface being cooled to solidify the metal and moving past the nozzle at a rate of from about 200 to about 10,000 feet per minute; the nozzle having an orifice passage defined between first and second inside surfaces and an insert forming at least a portion of one of the inside surfaces; moving the insert relative to the tundish to adjust the position of the insert to less than about 0.120 inch from the casting surface; continuously delivering molten metal through the nozzle onto the moving continuous casting surface to form a continuous metal strip; and continuously removing the cast strip from the continuous casting surface.
Claim 32
Independent Claim
134 words
A method for continuously casting strip material comprising: providing a continuous surface upon which metal strip is cast from a molten metal holding tundish having a nozzle, the surface being cooled to solidify the metal and moving past the nozzle at a rate of from about 200 to about 10,000 feet per minute; the nozzle having an orifice passage defined between first and second inside surfaces and an insert forming at least a portion of one of the inside surfaces; moving the insert relative to the tundish to adjust the position of the insert to less than about 0.120 inch from the casting surface; continuously delivering molten metal through the nozzle onto the moving continuous casting surface to form a continuous metal strip; and continuously removing the cast strip from the continuous casting surface.
Claim 33
Dependent Claim
27 words
The method as set forth in claim 29 including moving the insert relative to the tundish before the tundish is moved in position toward the casting surface.
Claim 34
Dependent Claim
27 words
The method as set forth in claim 29 including moving the insert relative to the tundish after the tundish is moved in position toward the casting surface.
Claim 35
Dependent Claim
27 words
The method as set forth in claim 29 including moving the insert relative to the tundish while the tundish is moved in position toward the casting surface.
Claim 36
Dependent Claim
17 words
The method as set forth in claim 29 includes moving the insert in a reciprocal lateral direction.
Claim 37
Dependent Claim
18 words
The method as set forth in claim 29 includes moving the insert in a generally horizontal lateral direction.
Claim 38
Dependent Claim
18 words
The method as set forth in claim 29 includes moving the insert in a generally vertical lateral direction.
Claim 39
Dependent Claim
17 words
The method as set forth in claim 29 includes moving the insert in a reciprocal angular direction.
Claim 40
Dependent Claim
17 words
The method as set forth in claim 29 includes moving the insert in a reciprocal arcuate direction.
Claim 41
Dependent Claim
28 words
A method as set forth in claim 29 includes canting the insert such that end portions of the insert may be moved toward and from the casting surface.
Claim 42
Dependent Claim
29 words
A method as set forth in claim 29 includes moving a separate insert forming at least a portion of another inside surface, the movement being relative to the tundish.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-27 | 1988-05-28 | 1988-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-27 | 1992-05-28 | 1992-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-27 | 1996-05-28 | 1996-11-27 | $7700.00 | Window Closed / Lapsed |