Patent US1669141A successfully refreshed from Google Patents.
Patent US4236570A successfully refreshed from Google Patents.
US4236570A
Expired / Lapsed
US
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Ingot shape control by dynamic head in electromagnetic casting
Assignee: Olin Corp
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Filing: 1979-01-08
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Granted: 1980-12-02
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Expires: 1999-01-08
Abstract
Abstract A method and apparatus is disclosed for electromagnetic casting of metal and alloy ingots of desired shape having portions of small radius of curvature. An open-ended container or hot-top having spaced internal baffles is placed before the electromagnetic induction station of the casting apparatus to provide desired metal flow patterns. Also disclosed is a downspout having nozzle portions which provide preferred directionality to supplied molten metal.
Inventors
- 👤 Gerhart K. Gaule
- 👤 John C. Yarwood
- 👤 Derek E. Tyler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:12
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/01; B22D11/015
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
121 words
In an apparatus for electromagnetic forming of molten metals or alloys into a casting of desired shape having at least one portion of small radius of curvature comprising: means for providing said molten metals or alloys; means comprising a hot-top for receiving said molten metals or alloys, said hot-top including at least one corner and having approximately the same cross-section as said casting; means comprising an electromagnetic casting station for forming said molten metals or alloys as they emerge from said hot-top into said casting; the improvement comprising: means associated with said hot-top adapted for increasing the dynamic pressure of said molten metals or alloys at said hot-top corner by preferentially directing molten metal or alloy flow toward said hot-top corner.
Claim 2
Dependent Claim
121 words
In an apparatus for electromagnetic forming of molten metals or alloys into a casting of desired shape having at least one portion of small radius of curvature comprising: means for providing said molten metals or alloys; means comprising a hot-top for receiving said molten metals or alloys, said hot-top including at least one corner and having approximately the same cross-section as said casting; means comprising an electromagnetic casting station for forming said molten metals or alloys as they emerge from said hot-top into said casting; the improvement comprising: means associated with said hot-top adapted for increasing the dynamic pressure of said molten metals or alloys at said hot-top corner by preferentially directing molten metal or alloy flow toward said hot-top corner.
Claim 3
Dependent Claim
24 words
An apparatus as in claim 1 wherein said hot-top includes at least one internal baffle for preferentially directing said molten metal or allow flow.
Claim 4
Dependent Claim
27 words
An apparatus as in claim 2 wherein said hot-top includes two internal spaced baffles, each of said baffles being located on opposed internal walls of said hot-top.
Claim 5
Dependent Claim
27 words
An apparatus as in claim 2 wherein said hot-top includes four internal spaced baffles, each of said baffles being located on individual internal walls of said hot-top.
Claim 6
Dependent Claim
19 words
An apparatus as in claim 1 wherein said means for pouring comprises downspout means having at least one nozzle.
Claim 7
Dependent Claim
19 words
An apparatus as in claim 2 wherein said means for pouring comprises downspout means having at least one nozzle.
Claim 8
Dependent Claim
17 words
An apparatus as in claim 4 wherein said hot-top is of approximately rectangular shape with four corners.
Claim 9
Dependent Claim
37 words
An apparatus as in claim 7 wherein said means for pouring comprises downspout means having four nozzles, each of said nozzles providing directionality to the molten metal or alloy being poured into said hot-top toward said corners.
Claim 10
Dependent Claim
20 words
An apparatus as in claim 2 wherein said at least one baffle is located at the bottom of said hot-top.
Claim 11
Dependent Claim
24 words
An apparatus as in claim 2 wherein said at least one baffle is located greater than about 1/4" from the bottom of said hot-top.
Claim 12
Dependent Claim
16 words
An apparatus as in claim 9 wherein said hot-top has a height greater than about 3/4".
Claim 13
Dependent Claim
22 words
An apparatus as in claim 2 wherein said at least one baffle has a thickness of from about 1/2" to about 1".
Claim 14
Dependent Claim
32 words
An apparatus as in claim 1 including means for partially closing the inlet end of said hot-top to provide means for removal of undesirable particles from said poured molten metal or alloy.
Claim 15
Dependent Claim
31 words
An apparatus as in claim 13 wherein said means for partially closing the inlet end of said hot-top comprises an open pored ceramic foam filter in spanning engagement with said hot-top.
Claim 16
Dependent Claim
28 words
An apparatus as in claim 13 wherein said means for partially closing the inlet end of said hot-top comprises an apertured screen in spanning engagement with said hot-top.
Claim 17
Dependent Claim
134 words
In a process for electromagnetic forming of molten metals or alloys into a casting of desired shape having at least one portion of small radius of curvature comprising: providing a hot-top having approximately the same cross-section as said casting; pouring said molten metal or alloy into said hot-top; providing an electromagnetic casting station; and forming said molten metal or alloy into said casting in said electromagnetic casting station as it emerges from said hot-top, the improvement which comprises: increasing the dynamic pressure of said molten metals or alloys at said portion of small radius of curvature by preferentially directing metal or alloy flow in said forming casting toward said portion of small radius of curvature, whereby a casting of desired shape having said at least one portion of small radius of curvature is formed.
Claim 18
Dependent Claim
134 words
In a process for electromagnetic forming of molten metals or alloys into a casting of desired shape having at least one portion of small radius of curvature comprising: providing a hot-top having approximately the same cross-section as said casting; pouring said molten metal or alloy into said hot-top; providing an electromagnetic casting station; and forming said molten metal or alloy into said casting in said electromagnetic casting station as it emerges from said hot-top, the improvement which comprises: increasing the dynamic pressure of said molten metals or alloys at said portion of small radius of curvature by preferentially directing metal or alloy flow in said forming casting toward said portion of small radius of curvature, whereby a casting of desired shape having said at least one portion of small radius of curvature is formed.
Claim 19
Dependent Claim
44 words
A process as in claim 16 wherein said step of increasing the dynamic pressure of said molten metals or alloys is carried out by providing directionality to the molten metal or alloy being poured toward said forming casting portion of small radius of curvature.
Claim 20
Dependent Claim
49 words
A process as in claim 17 wherein said casting comprises a rectangular slab ingot and said step of increasing the dynamic pressure of said molten metals or alloys is carried out by providing directionality to said molten metal or alloy being poured toward each corner of said forming ingot.
Claim 21
Dependent Claim
52 words
A process as in claim 16 wherein said hot-top is provided with at least one baffle along the internal walls thereof and said step of increasing the dynamic pressure of said molten metals or alloys is carried out by causing metal or alloy to preferentially flow about said at least one baffle.
Claim 22
Dependent Claim
71 words
A process as in claim 16 wherein said casting comprises a rectangular slab ingot, and said hot-top is provided with four spaced baffles, each of said baffles being located on individual internal walls of said hot-top, whereby said step of increasing the dynamic pressure of said molten metals or alloys is carried out by causing metal or alloy to preferentially flow about said baffles toward the corners of said forming ingot.
Claim 23
Dependent Claim
124 words
In a process for electromagnetic forming of molten metals or alloys into a casting of desired shape having at least one portion of small radius of curvature comprising: providing an electromagnetic casting station; pouring said molten metal or alloy into said electromagnetic casting station; forming said molten metal or alloy in said electromagnetic casting station to form said casting; the improvement comprising: increasing the dynamic pressure of said molten metals or alloys at said portion of small radius of curvature by preferentially directing said molten metal or alloy flow toward said portion of small radius of curvature as said molten metal or alloy is poured, whereby a casting of desired shape having said at least one portion of small radius of curvature is formed.
Claim 24
Dependent Claim
124 words
In a process for electromagnetic forming of molten metals or alloys into a casting of desired shape having at least one portion of small radius of curvature comprising: providing an electromagnetic casting station; pouring said molten metal or alloy into said electromagnetic casting station; forming said molten metal or alloy in said electromagnetic casting station to form said casting; the improvement comprising: increasing the dynamic pressure of said molten metals or alloys at said portion of small radius of curvature by preferentially directing said molten metal or alloy flow toward said portion of small radius of curvature as said molten metal or alloy is poured, whereby a casting of desired shape having said at least one portion of small radius of curvature is formed.
Claim 25
Dependent Claim
52 words
A process as in claim 21 wherein said casting comprises a rectangular slab ingot and said step of increasing the dynamic pressure of said molten metals or alloys is carried out by providing directionality to said molten metal or alloy being poured into said hot-top toward the corners of said forming ingot.
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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) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |