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

Alcan International Limited

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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-0633584 (2000-08-07)
발명자 / 주소	Sivilotti, Olivo G. Sutherland, James Gordon Thorburn, Herbert James
출원인 / 주소	Alcan International Limited
대리인 / 주소	Cooper & Dunham LLP
인용정보	피인용 횟수 : 7 인용 특허 : 10

초록
▼

A belt cooling and guiding apparatus for a casting belt of a twin belt caster. The cooling and guiding apparatus comprises 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 belt cooling and guiding apparatus for a casting belt of a twin belt caster provided with 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 molten metal into the casting mold at the entrance of the casting mold; the cooling and guiding apparatus comprising at least one elongated nozzle having a support surface facing a reverse surface of said casting belt, said support surface being bounded by longitudinal outer edges and having a continuous longitudinal slot arranged transversely substantially completely across said casting belt adapted to deliver a cooling liquid to the reverse surface of said belt in the form of a continuous film having a substantially uniform thickness and velocity of flow when considered in the transverse direction of the belt, a drainage opening adapted to remove cooling liquid at a position spaced from said continuous slot, and a vacuum system associated with said drainage opening adapted to apply suction to said drainage opening, wherein said support surface has a bevel adjacent to each of said outer edges, each bevel sloping rearwardly of the nozzle in a direction from said slot towards an adjacent outer edge of the nozzle. 2. The apparatus 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 apparatus 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 apparatus of claim 1, wherein the slot is of constant width along its entire length. 5. The apparatus of claim 1, wherein said slot has a width dimension in said direction of advancement of more than about 0.125 mm. 6. The apparatus 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 apparatus of claim 1, including a filter for filtering particles from the cooling liquid before said liquid passes through said slot. 8. The apparatus 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 apparatus 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 apparatus of claim 9, having from one to three such additional nozzles arranged in succession in the direction of advancement of said belt through the casting apparatus. 11. The apparatus of claim 1, wherein said nozzle is positioned at said reverse surface immediately adjacent to said molten metal entrance of the casting mold. 12. The apparatus 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 apparatus of claim 1, wherein said support surface is planar. 14. The apparatus of claim 1, wherein said bevel extends inwardly from said outer edges towards said slot by a distance of from 2.5 mm to 3.5 mm. 15. The apparatus of claim 1, wherein said nozzle is rigidly mounted adjacent to said reverse surface. 16. In a twin belt cooling and guiding apparatus, a nozzle assembly comprising an elongated support surfac e adapted to support a reverse surface of a casting belt of predetermined width, the support surface having a predetermined length and being bounded by longitudinal outer edges, an elongated longitudinal continuous slot in said support surface having a length substantially the same as said predetermined length of the support surface for delivery of cooling liquid in the form of a continuous film having uniform thickness and velocity of flow along the slot, and a drainage opening for removal of cooling liquid spaced from said continuous slot, wherein said support surface has a bevel adjacent to each of said outer edges, each bevel sloping rearwardly of the nozzle in a direction from said slot towards an adjacent outer edge of the nozzle. 17. The nozzle of claim 16, wherein said drainage opening is an elongated gap in the support surface having a length substantially the same as the length of the support surface. 18. The nozzle of claim 16, wherein the slot is of constant width along its entire length. 19. The nozzle of claim 16, wherein said slot has a width dimension more than about 0.125 mm. 20. The nozzle of claim 16, wherein the slot has a width dimension in the range of 0.125 to 0.15 mm. 21. The nozzle of claim 16, including 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. 22. The nozzle of claim 16, including at least one additional support surface having an elongated continuous slot for delivery of further cooling liquid to said reverse surface. 23. The nozzle of claim 16, wherein said support surface includes a continuous elongated groove having a length substantially the same as the length of said support surface, said groove having a width greater than said slot, and said slot having an outer end terminating in said groove. 24. The nozzle of claim 16, wherein said support surface is planar. 25. The nozzle of claim 16, wherein said bevel extends inwardly from said outer edges towards said slot by a distance of from 2.5 mm to 3.5 l mm.

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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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