US4479528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strip casting apparatus
Assignee: Allegheny Ludlum Steel Corp
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Filing: 1982-07-02
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Granted: 1984-10-30
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Expires: 2002-07-02
Abstract
Abstract An apparatus for continuously casting metallic strip material includes a tundish, and a nozzle comprising a curvilinear element, with an orifice passage in the element having substantially uniform cross-sectional dimensions throughout the longitudinal extent thereof. Disposed outside the nozzle is a cooled casting surface movable past the nozzle in a direction substantially perpendicular to the longitudinal axis of the orifice passage. First and second inside surfaces of the element define the orifice passage through which molten metal is fed to the casting surface.
Inventors
- 👤 Robert E. Maringer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:55
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/005; B22D11/06
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
234 words
An apparatus for continuously casting metal strip comprising: a tundish for receiving and holding molten metal, a nozzle comprising at least one separate substantially U-shaped curvilinear element disposed in the tundish and opening into the tundish, said curvilinear element having an elongated orifice passage therein defined between a first side portion and a second side portion of the curvilinear element, the orifice passage extending along the length of the U-shaped curvilinear element and approximating the width of the strip to be cast, said orifice passage having substantially uniform cross-sectional dimensions throughout the longitudinal extent thereof, and a cooled casting surface at least as wide as the strip to be cast, disposed at a standoff distance of less than 0.120 inch from the nozzle, movable past a discharge end of the orifice passage in a direction substantially perpendicular to the longitudinal axis of the orifice passage, said first side portion located downstream with respect to the direction of movement of the casting surface and having substantially planar inside surfaces defining the orifice passage, and an outer, lip projecting surface at the discharge end of the orifice passage disposed toward, facing and in complete parallelism with the casting surface for a length of at least 0.01 inch, the outer, lip projecting surface of the first side portion being relieved to define a lip projection at a location beginning at the point of termination of complete parallelism.
Claim 2
Independent Claim
234 words
An apparatus for continuously casting metal strip comprising: a tundish for receiving and holding molten metal, a nozzle comprising at least one separate substantially U-shaped curvilinear element disposed in the tundish and opening into the tundish, said curvilinear element having an elongated orifice passage therein defined between a first side portion and a second side portion of the curvilinear element, the orifice passage extending along the length of the U-shaped curvilinear element and approximating the width of the strip to be cast, said orifice passage having substantially uniform cross-sectional dimensions throughout the longitudinal extent thereof, and a cooled casting surface at least as wide as the strip to be cast, disposed at a standoff distance of less than 0.120 inch from the nozzle, movable past a discharge end of the orifice passage in a direction substantially perpendicular to the longitudinal axis of the orifice passage, said first side portion located downstream with respect to the direction of movement of the casting surface and having substantially planar inside surfaces defining the orifice passage, and an outer, lip projecting surface at the discharge end of the orifice passage disposed toward, facing and in complete parallelism with the casting surface for a length of at least 0.01 inch, the outer, lip projecting surface of the first side portion being relieved to define a lip projection at a location beginning at the point of termination of complete parallelism.
Claim 3
Dependent Claim
53 words
An apparatus as set forth in claim 1 wherein: said second side portion has a substantially planar inside surface substantially parallel to and facing the inside surface of the first side portion at least at a lower portion of said orifice passage, and a bottom surface disposed toward, and facing the casting surface.
Claim 4
Dependent Claim
20 words
An apparatus as set forth in claim 1 wherein the orifice passage is substantially centrally located in the curvilinear element.
Claim 5
Dependent Claim
32 words
An apparatus as set forth in claim 1 wherein the casting surface is movable past the nozzle at a rate of from about 200 to about 10,000 linear surface feet per minute.
Claim 6
Dependent Claim
32 words
An apparatus as set forth in claim 1 wherein the casting surface is movable past the nozzle at a rate of from about 1,800 to about 4,000 linear surface feet per minute.
Claim 7
Dependent Claim
58 words
An apparatus as set forth in claim 3 wherein an inside portion of the orifice passage defined between the inside surface of the first side portion and the inside surface of the second side portion tapers inwardly from the molten metal holding portion of the nozzle to the location where said inside surfaces are parallel to one another.
Claim 8
Dependent Claim
28 words
An apparatus as set forth in claim 1 wherein the standoff distance between the outer, lip projecting surface and the casting surface is less than about 0.080 inch.
Claim 9
Dependent Claim
34 words
An apparatus as set forth in claim 1 wherein the outer, lip projecting surface extends for a length of at least 0.02 inch before the projecting surface is relieved to define the lip projection.
Claim 10
Dependent Claim
35 words
An apparatus as set forth in claim 1 wherein an integral curvilinear surface is provided between the inside surface of the first side portion and the outer, lip projecting surface of the first side portion.
Claim 11
Dependent Claim
34 words
An apparatus as set forth in claim 3 wherein a standoff distance of less than about 0.080 inch is maintained between the bottom surface of the second side portion surface and the casting surface.
Claim 12
Dependent Claim
21 words
An apparatus as set forth in claim 1 wherein the casting surface comprises a peripheral surface of a water cooled wheel.
Claim 13
Dependent Claim
33 words
An apparatus as set forth in claim 12 wherein the wheel is made of a metal selected from the group consisting of copper, copper alloy, aluminum, aluminum alloy, steel, molybdenum and combinations thereof.
Claim 14
Dependent Claim
31 words
An apparatus as set forth in claim 3 wherein at least a portion of the bottom surface of the second side portion is in complete parallelism with the casting surface therebelow.
Claim 15
Dependent Claim
34 words
An apparatus as set forth in claim 1 wherein the distance between the casting surface and the parallel, facing outer, lip projecting surface of the first side portion is less than about 0.025 inch.
Claim 16
Dependent Claim
34 words
An apparatus as set forth in claim 1 wherein the distance between the casting surface and the parallel, facing outer lip projecting surface of the first side portion is less than about 0.010 inch.
Claim 17
Dependent Claim
35 words
An apparatus as set forth in claim 1 wherein the distance between the casting surface and the parallel, facing outer lip projecting surface of the first side portion is from about 0.003 to 0.006 inch.
Claim 18
Dependent Claim
34 words
An apparatus as set forth in claim 1 wherein the distance between the parallel facing inside surfaces defining at least an outer portion of the orifice passage is from about 0.010 to 0.035 inch.
Claim 19
Dependent Claim
33 words
An apparatus as set forth in claim 3 wherein a standoff distance of less than about 0.002 inch is maintained between the bottom surface of the second side portion and the casting surface.
Claim 20
Dependent Claim
29 words
An apparatus as set forth in claim 2 wherein the inside surfaces defining the orifice passage are disposed toward the casting surface at an angle of less than 90°.
Claim 21
Dependent Claim
28 words
An apparatus as set forth in claim 1 wherein the inside surfaces defining the orifice passage are disposed toward the casting surface at an angle of about 45°.
Claim 22
Dependent Claim
48 words
An apparatus as set forth in claim 1 wherein the curvilinear element 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.
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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) | 1987-10-30 | 1988-04-30 | 1988-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-30 | 1992-04-30 | 1992-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-30 | 1996-04-30 | 1996-10-30 | $7700.00 | Window Closed / Lapsed |