US3580328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold for improved control of heat transfer in casting plate or strip products
Assignee: Motors Liquidation Co
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Filing: 1969-05-12
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Granted: 1971-05-25
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Expires: 1989-05-12
Abstract
Abstract An open-ended mold is disclosed for continuously casting metal plate or strip, the mold having a graphite casting cavity liner formed of two parallel plates separated at two of their opposing edges with spacer members so as to define an open ended cavity of substantially rectangular cross section, and two cooled metal jackets each tightly clamped against a liner plate. The two principal directions of heat transfer from the mold cavity defined by the liner are through the respective oppositely disposed graphite plates into the adjacent cooled jackets. Improved control over the rate of heat transfer from the mold cavity is obtained by providing a slight convex curvature or crown of suitable height on either the internal surfaces of each cooled jacket or the adjacent external surfaces of the liner plates so that when a crowned surface is tightly clamped against an adjacent flat surface positive control is maintained over the area of contact between the surfaces during casting despite the inherent tendency of the graphite liners to bow to the mold cavity when in contact with hot metal due to thermal expansion.
Inventors
- 👤 Robert E Eppich
- 👤 Fred J Webbere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:50
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/04; B22D11/045
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
145 words
A mold for the continuous casting of metal comprising a cooled metal jacket disposed in surface to surface contact heat transfer relationship with a graphite mold liner, said liner defining a cavity having a first open end into which molten metal is fed and a second open end from which cast product is withdrawn, said cavity being rectangular in cross section in a plane transverse to the direction of flow of said metal through said cavity, the said contacting surfaces of said jacket and said liner being characterized in that one of said surfaces is substantially flat and the adjacent contacting surface is convex with respect to said flat surface, the curvature of said convex surface being predetermined such that controlled surface to surface contact is maintained between said jacket and said liner for purposes of efficient heat transfer during the operation of said mold.
Claim 2
Dependent Claim
145 words
A mold for the continuous casting of metal comprising a cooled metal jacket disposed in surface to surface contact heat transfer relationship with a graphite mold liner, said liner defining a cavity having a first open end into which molten metal is fed and a second open end from which cast product is withdrawn, said cavity being rectangular in cross section in a plane transverse to the direction of flow of said metal through said cavity, the said contacting surfaces of said jacket and said liner being characterized in that one of said surfaces is substantially flat and the adjacent contacting surface is convex with respect to said flat surface, the curvature of said convex surface being predetermined such that controlled surface to surface contact is maintained between said jacket and said liner for purposes of efficient heat transfer during the operation of said mold.
Claim 3
Dependent Claim
159 words
A mold for continuous casting of elongated metal strip or plate of rectangular cross section comprising a graphite mold insert member having a substantially rectangular outer peripheral surface in a plane transverse to the direction of flow of said cast metal and defining a mold cavity of rectangular cross section, Said cavity having an inlet for the introduction of molten metal and an outlet for the withdrawal of cast product therefrom, and a cooled metallic jacket engaging at least the two sides of greatest area of said rectangular peripheral outer surface, the two engaging surfaces of said jacket and a said side of said insert being characterized in that one of said surfaces is substantially flat and the engaging surface is convex with respect to said flat surface, the curvature of said convex surface being predetermined such that controlled surface to surface contact between said insert and said jacket is maintained for efficient heat transfer during a casting operation.
Claim 4
Dependent Claim
159 words
A mold for continuous casting of elongated metal strip or plate of rectangular cross section comprising a graphite mold insert member having a substantially rectangular outer peripheral surface in a plane transverse to the direction of flow of said cast metal and defining a mold cavity of rectangular cross section, Said cavity having an inlet for the introduction of molten metal and an outlet for the withdrawal of cast product therefrom, and a cooled metallic jacket engaging at least the two sides of greatest area of said rectangular peripheral outer surface, the two engaging surfaces of said jacket and a said side of said insert being characterized in that one of said surfaces is substantially flat and the engaging surface is convex with respect to said flat surface, the curvature of said convex surface being predetermined such that controlled surface to surface contact between said insert and said jacket is maintained for efficient heat transfer during a casting operation.
Claim 5
Dependent Claim
178 words
A mold for continuously casting flat metal plate or strip comprising two rectangular plates of graphite separated by spacer members at two opposite edges of said plates so as to define a mold cavity rectangular in cross section and open at two ends, and a cooled jacket member tightly clamped in heat transfer relationship to the outer surface of each of said plates to thereby provide a path for the efficient removal of heat from said mold cavity through each of said plates into each of said cooled jackets, the engaging surfaces of a said plate and a said jacket being characterized in that one said engaging surface is substantially flat and the other is so convex with respect to said flat surface that in the operation of said mold in a casting process surface contact to a predetermined degree between the said engaging surfaces is maintained for purposes of efficient heat transfer despite the tendency of said plate member to bow into said mold cavity and out of surface contact with said jacket due to thermal expansion.
Claim 6
Dependent Claim
178 words
A mold for continuously casting flat metal plate or strip comprising two rectangular plates of graphite separated by spacer members at two opposite edges of said plates so as to define a mold cavity rectangular in cross section and open at two ends, and a cooled jacket member tightly clamped in heat transfer relationship to the outer surface of each of said plates to thereby provide a path for the efficient removal of heat from said mold cavity through each of said plates into each of said cooled jackets, the engaging surfaces of a said plate and a said jacket being characterized in that one said engaging surface is substantially flat and the other is so convex with respect to said flat surface that in the operation of said mold in a casting process surface contact to a predetermined degree between the said engaging surfaces is maintained for purposes of efficient heat transfer despite the tendency of said plate member to bow into said mold cavity and out of surface contact with said jacket due to thermal expansion.
Claim 7
Dependent Claim
225 words
A mold for continuously casting flat metal plate or strip of up to about 8 inches in width and of substantially greater but indefinite length comprising two substantially flat rectangular plates of graphite separated by spacer members at two opposite edges of said plates so as to define a mold cavity rectangular in cross section and open at two ends, the width of said cavity being up to about 8 inches, the height of said cavity being up to about 1 inch, and a cooled metal jacket tightly clamped in heat transfer relationship to the outer surface of each of said plates to thereby provide a path for efficient removal of heat from said mold cavity through each of said plates into each of said cooled jackets, the engaging surfaces of a said plate and a said jacket being characterized in that said surface of said plate is substantially flat and said surface of said jacket is prepared with a slight convex curvature with respect to said flat surface, the maximum height of said convex curvature being about 0.005 inch to 0.020 inch, the location of said maximum height being adjacent the center of said mold cavity whereby in the operation of said mold in a casting process surface contact to a predetermined degree between the said engaging surfaces is maintained for efficient heat transfer.
Claim 8
Dependent Claim
225 words
A mold for continuously casting flat metal plate or strip of up to about 8 inches in width and of substantially greater but indefinite length comprising two substantially flat rectangular plates of graphite separated by spacer members at two opposite edges of said plates so as to define a mold cavity rectangular in cross section and open at two ends, the width of said cavity being up to about 8 inches, the height of said cavity being up to about 1 inch, and a cooled metal jacket tightly clamped in heat transfer relationship to the outer surface of each of said plates to thereby provide a path for efficient removal of heat from said mold cavity through each of said plates into each of said cooled jackets, the engaging surfaces of a said plate and a said jacket being characterized in that said surface of said plate is substantially flat and said surface of said jacket is prepared with a slight convex curvature with respect to said flat surface, the maximum height of said convex curvature being about 0.005 inch to 0.020 inch, the location of said maximum height being adjacent the center of said mold cavity whereby in the operation of said mold in a casting process surface contact to a predetermined degree between the said engaging surfaces is maintained for efficient heat transfer.
Claim 9
Dependent Claim
227 words
A mold for continuously casting flat metal plate or strip of up to about 8 inches in width and of substantially greater but indefinite length comprising two substantially flat rectangular plates of graphite separated by spacer members at two opposite edges of said plates so as to define a mold cavity rectangular in cross section and open at two ends, the width of said cavity being up to about 8 inches, the height of said cavity being up to about 1 inch, and a cooled metal jacket tightly clamped in heat transfer relationship to the outer surface of each of said plates to thereby provide a path for the efficient removal of heat from said mold cavity through each of said plates into each of said cooled jackets, the engaging surfaces of a said plate and a said jacket being characterized in that the said surface of said jacket is substantially flat and the said surface of said plate is prepared with a slight convex curvature with respEct to said flat surface, the maximum height of said curvature being about 0.005 inch to 0.020 inch, the location of said maximum height being adjacent the center of said mold cavity whereby in the operation of said mold in a casting process surface contact to a predetermined degree between the said engaging surfaces is maintained for efficient heat transfer.
Claim 10
Dependent Claim
227 words
A mold for continuously casting flat metal plate or strip of up to about 8 inches in width and of substantially greater but indefinite length comprising two substantially flat rectangular plates of graphite separated by spacer members at two opposite edges of said plates so as to define a mold cavity rectangular in cross section and open at two ends, the width of said cavity being up to about 8 inches, the height of said cavity being up to about 1 inch, and a cooled metal jacket tightly clamped in heat transfer relationship to the outer surface of each of said plates to thereby provide a path for the efficient removal of heat from said mold cavity through each of said plates into each of said cooled jackets, the engaging surfaces of a said plate and a said jacket being characterized in that the said surface of said jacket is substantially flat and the said surface of said plate is prepared with a slight convex curvature with respEct to said flat surface, the maximum height of said curvature being about 0.005 inch to 0.020 inch, the location of said maximum height being adjacent the center of said mold cavity whereby in the operation of said mold in a casting process surface contact to a predetermined degree between the said engaging surfaces is maintained for efficient heat transfer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |