Continuous metal tube casting method and apparatus using inner solenoid coil
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United States of America Patent
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Jun 23, 1992
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N/A
app pub date -
Aug 17, 1990
filing date -
Aug 17, 1990
priority date (Note) -
Expired
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Abstract
An electromagnetic, levitation metal pipe casting method and system which provides an improved and simplified combined heat exchanger/levitator/containment coil assembly that comprises a single, outer multi-phase traveling wave coil structure and an inner solenoid coil structure. The outer, multi-phase traveling wave coil structure is positioned radially outside and coaxial with solidifing pipe during the casting process. The inner solenoid coil is positioned coaxial with and inside the pipe being cast. The outer multi-phase traveling wave coil and the inner solenoid coil are operated at substantially different frequencies and excitation current magnitudes. The improved system and method offer several functional and physical advantages over previous known levitation pipe casting systems. The principal improved features are: 1. Simplified operating and control procedures. 2. Simplified inner coil fabrication. 3. Simplified electrical and coolant connections to the inner coil. 4. Use of a single phase power supply for the inner coil instead of a multi-phase power supply.
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