[특허]Belt-cooling and guiding means for continuous belt casting of metal strip

Novelis Inc.

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특허 상세정보

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Belt-cooling and guiding means for continuous belt casting of metal strip

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B22D-011/06
미국특허분류(USC)	164/431; 164/432
출원번호	US-0846423 (2004-05-14)
발명자 / 주소	Sivilotti, Olivo G. Sutherland, James Gordon Thorburn, Herbert James
출원인 / 주소	Novelis Inc.
대리인 / 주소	Cooper &
인용정보	피인용 횟수 : 2 인용 특허 : 11

초록
▼

A belt cooling and guiding apparatus for a casting belt of a twin belt caster. The cooling and guiding apparatus includes at least one nozzle having a support surface facing a reverse surface of the casting belt (a surface opposite to a casting surface in the casting mold), provided with a continuous slot in the support surface arranged transversely substantially completely across the casting belt. The slot allows for delivery of cooling liquid to the reverse surface of the belt in the form of a continuous film having uniform thickness and velocity of flow when considered in the transverse direction of the belt. This allows for even cooling transversely of the belt. The nozzle arrangement is also provided with a drainage opening for removal of cooling liquid downstream from the continuous slot, and a vacuum system associated with the drainage opening for applying suction to the drainage opening. One or more such cooling nozzles is provided at the entrance of the casting mold where uniform cooling is critical to the characteristics of the cast strip article.

대표
청구항
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1. A twin belt caster, comprising a pair of rotatably supported endless casting belts, a casting mold formed between moving casting surfaces of confronting generally planar sections of the belts, said sections having reverse surfaces opposite said casting surfaces, the casting mold having a molten metal entrance at one end and a solidified sheet article outlet at an opposite end, and a casting injector for introduction of a molten metal into the casting mold at the entrance of the casting mold, said one end and said opposite end defining a mold region between them; said caster including a cooling and guiding apparatus for at least one of said casting belts, said apparatus comprising at least one nozzle having a support surface positioned adjacent to a reverse surface of said one casting belt, but spaced from said reverse surface by an operating standoff, said support surface having a continuous elongated slot arranged transversely substantially completely across said one casting belt adapted to deliver a cooling liquid to the reverse surface of said belt in the form of an intact continuous moving liquid film, a drainage opening adapted to remove cooling liquid spaced from said continuous slot and to transfer suction to said reverse surface of said casting belt, and a vacuum system associated with said drainage opening adapted to apply suction to said drainage opening, whereby, in use, said moving liquid film and said suction serve to maintain said standoff between said support surface and said reverse surface of said casting belt at predetermined separation while cooling said belt with said liquid.2. The twin belt caster of claim 1, wherein a first of said at least one nozzles taken in the direction of advancement of the said belt through said casting apparatus is positioned immediately adjacent to the entrance of the casting mold.3. The twin belt caster of claim 1, wherein said drainage opening is an elongated gap in the support surface arranged transversely substantially completely across said casting belt.4. The twin belt caster of claim 1, wherein the slot is of constant width along its entire length.5. The twin belt caster of claim 1, wherein said slot has a width dimension in said direction of advancement of more than about 0.125 mm.6. The twin belt caster of claim 1, wherein the slot has a width dimension in said direction of advancement in the range of 0.125 to 0.15 mm.7. The twin belt caster of claim 1, including a filter for filtering particles from the cooling liquid before said liquid passes through said slot.8. The twin belt caster of claim 1, wherein the nozzle includes an elongated chamber communicating with said slot along substantially an entire length of said slot, and at least one passage for supplying said cooling liquid to said chamber.9. The twin belt caster of claim 1, including at least one additional elongated nozzle provided with a support surface having an elongated continuous slot arranged transversely substantially completely across said casting belt for delivery of further cooling liquid to said reverse surface.10. The twin belt caster of claim 9, having from one to three such additional nozzles arranged in succession in the direction of advancement of said belt though the casting apparatus.11. The twin belt caster of claim 1, wherein said nozzle is positioned immediately adjacent to said molten metal entrance of the casting mold.12. The twin belt caster of claim 1, wherein said support surface includes a continuous elongated groove arranged transversely substantially completely across said one of said casting belts, said groove having a width greater than said slot, and said slot having an outer end terminating in said groove.13. The twin belt caster of claim 1, wherein said support surface is planar.14. The twin belt caster of claim 1, wherein said nozzle is rigidly mounted adjacent to said reverse surface.15. The twin belt caster of claim 1, wherein an array of point cooling nozzles is provided downstream of said nozzle provided with said slot.16. A belt cooling and guiding apparatus for a casting belt of a twin belt caster provided with a pair of rotably supported endless casting belts, a casting mold formed between moving casting surfaces of confronting generally planar sections of the belts, said sections having reverse surfaces opposite said casting surfaces, the casting mold having a molten metal entrance at one end and a solidified sheet article outlet at an opposite end, and a casting injector for introduction of a molten metal into the casting mold at the entrance of the casting mold, said one end and said opposite end defining a mold region between them; the cooling and guiding apparatus comprising at least one nozzle having a support surface positioned adjacent to a reverse surface of one of said casting belts, but spaced from said reverse surface by an operating standoff, said support surface having a continuous elongated slot arranged transversely substantially completely across said one casting belt adapted to deliver a cooling liquid to the reverse surface of said belt in the form of an intact continuous moving liquid film, a drainage opening adapted to remove cooling liquid spaced from said continuous slot and to transfer suction to said reverse surface of said casting belt, and a vacuum system associated with said drainage opening adapted to apply suction to said drainage opening, whereby, in use, said moving liquid film and said suction serve to maintain said standoff between said support surface and said reverse surface of said casting belt at a predetermined separation while cooling said belt with said liquid.17. The belt cooling and guiding apparatus of claim 16, wherein a first of said at least one nozzles taken in the direction of advancement of the said belt through said casting apparatus is positioned immediately adjacent to the entrance of the casting mold.18. The belt cooling and guiding apparatus of claim 16, wherein said drainage opening is an elongated gap in the support surface arranged transversely substantially completely across said casting belt.19. The belt cooling and guiding apparatus of claim 16, wherein the slot is of constant width along its entire length.20. The belt cooling and guiding apparatus of claim 16, wherein said slot has a width dimension in said direction of advancement of more than about 0.125 mm.21. The belt cooling and guiding apparatus of claim 16, wherein the slot has a width dimension in said direction of advancement in the range of 0.125 to 0.15 mm.22. The belt cooling and guiding apparatus of claim 16, including a filter for filtering particles from the cooling liquid before said liquid passes through said slot.23. The belt cooling and guiding apparatus of claim 16, wherein the nozzle includes an elongated chamber communicating with said slot along substantially an entire length of said slot, and at least one passage for supplying said cooling liquid to said chamber.24. The belt cooling and guiding apparatus of claim 16, including at least one additional elongated nozzle provided with a support surface having an elongated continuous slot arranged transversely substantially completely across said casting belt for delivery of further cooling liquid to said reverse surface.25. The belt cooling and guiding apparatus of claim 24, having from one to three such additional nozzles arranged in succession in the direction of advancement of said belt though the casting apparatus.26. The belt cooling and guiding apparatus of claim 16, wherein said nozzle is positioned immediately adjacent to said molten metal entrance of the casting mold.27. The belt cooling and guiding apparatus of claim 16, wherein said support surface includes a continuous elongated groove arranged transversely substantially completely across said one of said casting belts, said groove having a width greater than said slot, and said slot having an outer end terminating in said groove.28. The belt cooling and guiding apparatus of claim 16, wherein said support surface is planar.29. The belt cooling and guiding apparatus of claim 16, wherein said nozzle is rigidly mounted adjacent to said reverse surface.30. The belt cooling and guiding apparatus of claim 16, wherein an array of point cooling nozzles is provided downstream of said nozzle provided with said slot.

인용문헌 (11)

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Belt-cooling and guiding means for continuous belt casting of metal strip

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Belt-cooling and guiding means for continuous belt casting of metal strip

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