[특허]Thin sheet casting with electromagnetic pressurization

The United States of America as represented by the United States Department of Energy

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특허 상세정보

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Thin sheet casting with electromagnetic pressurization

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B22D-011/00
미국특허분류(USC)	164/463; 164/502; 164/423
출원번호	US-0420439 (1989-10-12)
발명자 / 주소	Walk, Steven R. Slepian, R. Michael Nathenson, Richard D. Williams, Robert S.
출원인 / 주소	The United States of America as represented by the United States Department of Energy
대리인 / 주소	Dvorscak, Mark P.Fisher, Robert J.Moser, William R.
인용정보	피인용 횟수 : 0 인용 특허 : 10

초록

An apparatus, method and system for the casting of thin strips or strips of metal upon a moving chill block that includes an electromagnet located so that molten metal poured from a reservoir onto the chill block passes into the magnetic field produced by the electromagnet. The electromagnet produces a force on the molten metal on said chill block in the direction toward said chill block in order to enhance thermal contact between the molten metal and the chill block.

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1. A system for the casting of thin strips of metal including: a reservoir for the containment of the molten metal to be cast and having a nozzle from which molten metal be poured, a movable chill block located adjacent the nozzle of said reservoir and capable of removing heat from a molten metal poured from said reservoir onto said movable chill block, and electromagnetic pressurization means adjustably mounted relative to the nozzle and over said movable chill block so that the molten metal poured from said reservoir onto said chill block passes only under said electromagnetic pressurization means and over said chill block, and further wherein said electromagnetic pressurization means produces a standing magnetic wave field that induces currents in the molten metal and chill block, and the current interacts with the magnetic field to generate a force on the molten metal on said movable chill block in the direction toward said chill block. 2. The system of claim 1 in which said electromagnetic pressurization means is an electromagnetic coil, said coil comprising a single-phase high frequency coil. 3. The system of claim 2 in which said electromagnetic coil is a solenoid coil having windings parallel to the direction of movement of said movable chill block. 4. The system of claim 2 in which said electromagnetic coil is a transverse solenoid coil having windings perpendicular to the direction of movement of said movable chill block. 5. The system of claim 2 in which said electromagnetic coil is a meander coil having windings generally perpendicular to the direction of movement of said movable chill block and further in which all the windings of said meander coil are located in a plane parallel to the direction of movement of said movable chill block. 6. The system of claim 2 in which said electromagnetic coil is a flat spiral coil having spiral windings and further in which all the windings of said flat spiral coil are located in a plane parallel to the direction of movement of said movable chill block. 7. The system of claim 1 in which said electromagnetic pressurization means includes: magnetic poles, a core connecting said magnetic poles, and an electromagnetic coil wound around said core. 8. The system of claim 7 in which said magnetic poles are located with respect to said movable chill block so that an electromagnetic field between said poles is perpendicular to the direction of movement of said movable chill block. 9. The system of claim 7 in which said magnetic poles are located with respect to said movable chill block so that an electromagnetic field between said poles is parallel to the direction of movement of said movable chill block. 10. The system of claim 7 in which said electromagnetic pressurization means includes: a flux shield located with respect to said poles so that flux from said electromagnetic pressurization means is concentrated on a molten metal disposed on said movable chill block. 11. The system of claim 10 in which said flux shield comprises a high conductivity copper plate. 12. The system of claim 2 in which said movable chill block comprises a rotating casting wheel. 13. In a system for the casting of thin strips of metal having: a reservoir for the containment of the molten metal to be cast and having a nozzle from which molten metal can flow, and a movable chill block located adjacent the nozzle of the reservoir and capable of removing heat from molten metal poured from the reservoir onto the movable chill block, an improvement comprising: electromagnetic pressurization means adjustably mounted relative to the nozzle and over the movable chill block so that the molten metal poured from the reservoir onto the chill block passes only under said electromagnetic pressurization means and over the chill block, and further wherein said electromagnetic pressurization means produces a standing magnetic wave field that induces currents in the molten metal and chill block, and the current interacts with the magnetic field to generate a force on the molten metal on the chill block in the direction toward the chill block. 14. The improvement of claim 13 in which said electromagnetic pressurization means is an electromagnetic coil, said coil comprising a single-phase high frequency coil. 15. The improvement of claim 14 in which said electromagnetic coil is a solenoid coil having windings parallel to the direction of movement of the movable chill block. 16. The improvement of claim 14 in which said electromagnetic coil is a transverse solenoid coil having windings perpendicular to the direction of movement of the movable chill block. 17. The improvement of claim 14 in which said electromagnetic coil is a meander coil having windings generally perpendicular to the direction of movement of the movable chill block and further in which all the windings of said meander coil are located in a plane parallel to the direction of movement of the movable chill block. 18. The improvement of claim 14 in which said electromagnetic coil is a flat spiral coil having spiral windings and further in which all the windings of said flat spiral coil are located in a plane parallel to the direction of movement of the movable chill block. 19. The improvement of claim 13 in which said electromagnetic pressurization means includes: magnetic poles, a core connecting said magnetic poles, and an electromagnetic coil wound around said core. 20. The improvement of claim 19 in which said magnetic poles are located with respect to the movable chill block so that an electromagnetic field between said poles is perpendicular to the direction of movement of the movable chill block. 21. The improvement of claim 19 in which said magnetic poles are located with respect to the movable chill block so that an electromagnetic field between said poles is parallel to the direction of movement of the movable chill block. 22. The improvement of claim 19 in which said electromagnetic pressurization means includes: a flux shield located with respect to said poles so that flux from said electromagnetic pressurization means is concentrated on a molten metal disposed on the movable chill block. 23. The improvement of claim 22 in which said flux shield comprises a high conductivity copper plate. 24. The improvement of claim 13 in which the movable chill block comprises a rotating casting wheel. 25. A method for the casting of thin strips of metal including: pouring molten metal to be cast from a reservoir onto a moving chill block, removing heat from the molten metal poured from the reservoir onto the moving chill block, producing a standing magnetic field that induces currents in the molten metal and chill block, causing the currents to interact with the magnetic field to generate a force on the molten metal on the chill block in the direction toward the chill block, whereby thermal contact between the moving chill block and the molten metal on the moving chill block can be maintained. 26. The method of claim 25 in which said step of producing a magnetic field is further characterized by: producing a magnetic field having a frequency of approximately 640 kilohertz. 27. The method of claim 25 in which said step of pouring molten metal is further characterized by: pouring molten metal to be cast from a reservoir onto a rotating chill wheel. 28. The method of claim 27 in which said step of pouring molten metal is further characterized by: pouring molten metal to be cast from a reservoir onto a rotating chill wheel that rotates at a speed of approximately 30 feet per second. 29. The method of claim 25 in which said step of pouring molten metal is further characterized by: pouring molten metal to a thickness of up to 0.125 inches from a reservoir onto a moving chill block to be cast.

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특허 상세정보

Thin sheet casting with electromagnetic pressurization

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특허 상세정보

Thin sheet casting with electromagnetic pressurization

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