IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0949808
(2007-12-04)
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등록번호 |
US-7798199
(2010-10-11)
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발명자
/ 주소 |
- Forbes Jones, Robin M.
- Shaffer, Sterry A.
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출원인 / 주소 |
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대리인 / 주소 |
Kirkpatrick & Lockhart Preston Gates Ellis LLP
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인용정보 |
피인용 횟수 :
14 인용 특허 :
125 |
초록
▼
A nucleated casting apparatus including an atomizing nozzle configured to produce a droplet spray of a metallic material, a mold configured to receive the droplet spray and form a preform therein, and a gas injector which can limit, and possibly prevent, overspray from accumulating on the mold. The
A nucleated casting apparatus including an atomizing nozzle configured to produce a droplet spray of a metallic material, a mold configured to receive the droplet spray and form a preform therein, and a gas injector which can limit, and possibly prevent, overspray from accumulating on the mold. The gas injector can be configured to produce a gas flow which can impinge on the droplet spray to redirect at least a portion of the droplet spray away from a side wall of the mold. In various embodiments, the droplet spray may be directed by the atomizing nozzle in a generally downward direction and the gas flow may be directed in a generally upward direction such that the gas flow circumscribes the perimeter of the mold.
대표청구항
▼
We claim: 1. An apparatus for producing a preform by nucleated casting, the apparatus comprising: an atomizing nozzle, wherein said atomizing nozzle produces a droplet spray of a molten metallic material and directs the droplet spray in a first direction, and wherein the first direction includes a
We claim: 1. An apparatus for producing a preform by nucleated casting, the apparatus comprising: an atomizing nozzle, wherein said atomizing nozzle produces a droplet spray of a molten metallic material and directs the droplet spray in a first direction, and wherein the first direction includes a vertically downward component; a mold in which the preform is formed, wherein said mold receives the droplet spray; and a gas injector associated with the mold, wherein said gas injector produces a gas flow in a second direction, and wherein the second direction includes a vertically upward component. 2. The apparatus of claim 1, wherein said mold includes a side wall, wherein said side wall includes a top surface, and wherein the gas flow is configured to redirect at least a portion of the droplet spray away from said top surface. 3. The apparatus of claim 1, wherein said mold includes a side wall, wherein said gas injector includes a plate, and wherein said plate and said side wall define a passage therebetween which directs the gas flow in the second direction. 4. The apparatus of claim 1, wherein said mold defines a perimeter, and wherein the gas flow produced by said gas injector encloses said perimeter. 5. The apparatus of claim 1, wherein said mold comprises a base and a side wall, wherein said side wall selectively rotates about an axis of rotation, wherein said base is movable relative to said side wall along said axis of rotation to control a distance between said atomizing nozzle and said base. 6. The apparatus of claim 1, further comprising a melting and refining apparatus in fluid communication with said atomizing nozzle selected from an electroslag remelting apparatus and a vacuum arc remelting apparatus. 7. The apparatus of claim 1, wherein at least one of said mold and said gas injector includes a polished surface configured to inhibit the accumulation of the droplet spray on said polished surface. 8. The apparatus of claim 7, wherein said polished surface comprises an average surface roughness of approximately 1 micrometer. 9. An apparatus for producing a preform by nucleated casting, the apparatus comprising: a mold in which the preform is formed, wherein said mold includes a side wall; an atomizing nozzle, wherein said atomizing nozzle produces a droplet spray of a molten metallic material; and a gas injector, wherein said gas injector produces a gas flow which redirects at least a portion of the droplet spray away from said side wall. 10. The apparatus of claim 9, wherein said gas injector directs the gas flow in a direction such that the gas flow impinges on the droplet spray. 11. The apparatus of claim 10, wherein said gas injector includes a plate, and wherein said plate and said side wall define a passage therebetween which directs the gas flow in said direction. 12. The apparatus of claim 9, wherein said mold defines a perimeter, and wherein the gas flow produced by said gas injector encloses said perimeter. 13. The apparatus of claim 9, wherein said mold further comprises a base, wherein said side wall selectively rotates about said axis of rotation, wherein said base is movable relative to said side wall along said axis of rotation to control a distance between said atomizing nozzle and said base. 14. The apparatus of claim 9, further comprising a melting and refining apparatus in fluid communication with said atomizing nozzle selected from an electroslag remelting apparatus and a vacuum arc remelting apparatus. 15. The apparatus of claim 9, wherein said gas injector directs the gas flow in a direction such that the gas flow impinges on said side wall. 16. The apparatus of claim 9, wherein at least one of said side wall and said gas injector includes a polished surface configured to inhibit the accumulation of the droplet spray on said polished surface. 17. The apparatus of claim 16, wherein said polished surface comprises an average surface roughness of approximately 1 micrometer. 18. An apparatus for producing a preform by nucleated casting, the apparatus comprising: a mold in which the preform is formed, wherein said mold includes a side wall; atomizing means for producing a droplet spray of a molten metallic material; and redirecting means for redirecting the droplet spray away from said side wall. 19. The apparatus of claim 18, wherein said mold defines a perimeter, and wherein said redirecting means encloses said perimeter. 20. The apparatus of claim 18, wherein at least one of said side wall and said redirecting means includes a polished surface configured to inhibit the accumulation of the droplet spray on said polished surface. 21. The apparatus of claim 20, wherein said polished surface comprises an average surface roughness of approximately 1 micrometer. 22. A method of casting a metallic material, the method comprising: melting a metallic material to provide a molten material; forming a droplet spray of the molten material with an atomizing nozzle; depositing at least a portion of the droplet spray of the molten material within a mold, the mold having a top surface; forming a gas flow with a gas injector; and redirecting at least a portion of the droplet spray with the gas flow to prevent at least a portion of the molten material from accumulating on the top surface. 23. The method of claim 22, wherein redirecting at least a portion of the droplet spray with the gas flow includes impinging at least a portion of the gas flow on the droplet spray. 24. The method of claim 22, wherein redirecting at least a portion of the droplet spray with the gas flow includes impinging at least a portion of the gas flow on the top surface of the mold. 25. The method of claim 22, wherein forming a droplet spray of the molten material includes directing the droplet spray in a direction having a vertically downward component, and wherein redirecting at least a portion of the droplet spray with the gas flow includes directing the gas flow in a direction having a vertically upward component. 26. The method of claim 22, further comprising the step of polishing at least one of the top surface of the mold and a surface of the gas injector to inhibit the accumulation of the droplet spray on the polished surface. 27. The method of claim 26, wherein said polished surface comprises an average surface roughness of approximately 1 micrometer.
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