US4471831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for rapid solidification casting of high temperature and reactive metallic alloys
Assignee: Honeywell International Inc
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Filing: 1983-03-17
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Granted: 1984-09-18
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Expires: 2003-03-17
Abstract
Abstract An apparatus for rapid solidification casting of molten high temperature and/or reactive metallic alloys has a heat extraction crucible for containing the alloy in liquid form. A nozzle forms an integral part of the crucible and allows for ejection of a stream of molten metal. The heat extracting crucible and nozzle are protected from the molten alloy by a shell of the alloy which has solidified and prevents reaction between the molten metal and the heat extracting crucible.
Inventors
- 👤 Ranjan Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:28
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; B22F9/082; B22D; B22D11/00; B22D11/005; B22D11/06; B22D41/00; B22D41/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
141 words
Apparatus for casting metal filaments directly from the melt comprising, in combination; (a) a crucible which is constructed of thermally conductive material for holding a metal charge; (b) means for supplying heat to melt the metal charge contained in said crucible to form a melt of molten metal; (c) at least one cooling passage internal to said crucible for passing a cooling medium therethrough to provide a solidified layer of the melt for preventing interaction between the melt and said crucible; (d) a nozzle forming an integral part of said crucible and enclosing an insulating insert having a passage therethrough for ejection of a stream of molten metal, said passage having a diameter of between about 0.06 and 0.1 in.; (e) means for rapidly quenching the stream of molten metal; and (f) means for controlling the ejection of the molten metal.
Claim 2
Dependent Claim
141 words
Apparatus for casting metal filaments directly from the melt comprising, in combination; (a) a crucible which is constructed of thermally conductive material for holding a metal charge; (b) means for supplying heat to melt the metal charge contained in said crucible to form a melt of molten metal; (c) at least one cooling passage internal to said crucible for passing a cooling medium therethrough to provide a solidified layer of the melt for preventing interaction between the melt and said crucible; (d) a nozzle forming an integral part of said crucible and enclosing an insulating insert having a passage therethrough for ejection of a stream of molten metal, said passage having a diameter of between about 0.06 and 0.1 in.; (e) means for rapidly quenching the stream of molten metal; and (f) means for controlling the ejection of the molten metal.
Claim 3
Dependent Claim
87 words
The apparatus of claim 1 wherein said thermally conductive material is electrically conductive, said means for supplying heat to melt the metal charge is at least one electrode associated with said crucible employed for striking an arc between said electrode and the metal charge contained in said crucible; and said means for rapidly quenching the stream of molten metal is a chill surface provided by a heat extracting member for deposition of molten metal thereon for quenching into filament, together with means for advancing said chill surface.
Claim 4
Dependent Claim
71 words
The apparatus of claim 2 wherein said means for controlling the ejection of the metal stream comprises a shutter which, when closed, blocks the flow of metal through said nozzle and a sealed crucible cover to provide a crucible chamber for controlling the pressure in the crucible chamber, thereby providing a means for increasing the hydrostatic pressure on the melt to assist in the ejection of the melt through said nozzle.
Claim 5
Dependent Claim
16 words
The apparatus of claim 2 wherein said means for supplying heat comprises at least two electrodes.
Claim 6
Dependent Claim
28 words
The apparatus of claim 1 wherein said means for rapidly quenching the stream of molten metal comprises a source of a gas jet for impinging on the stream.
Claim 7
Dependent Claim
14 words
The apparatus of claim 1 further comprising an induction coil for heating the insert.
Claim 8
Dependent Claim
21 words
The apparatus of claim 6 further comprising a graphite susceptor in contact with the insert and magnetically coupled to the coil.
References Cited (Backward Citations)
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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) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |