Metal founding – Including means to directly apply magnetic force to work or... – By electromagnetic means
Patent
1975-03-21
1977-04-12
Shore, Ronald J.
Metal founding
Including means to directly apply magnetic force to work or...
By electromagnetic means
164 49, 164273R, B22D 1110, B22D 2702
Patent
active
040169260
ABSTRACT:
The present invention relates to a rotary magnetic field type stirrer for a continuous metal casting machine which has characteristics as mentioned below. In a two-pole rotary magnetic field type stirrer having poles positioned symmetrically around the central axis of the cast strand in the secondary cooling zone of a continuous casting machine, a pair of electro-magnetic coils each having two or more magnetic poles in the longitudinal direction of the cast strand are placed facing each other with the cast strand inbetween and are so connected as to give opposite polarities to the magnetic poles facing each other, and two or more of such pairs are placed around the central axis of said cast strand, so that a two-pole rotary magnetic field may be generated at two or more locations in the longitudinal direction of the cast strand by causing a single phase alternating current to flow in one pair of said electromagnetic coils and a single phase alternating current of a prescribed phase difference to flow in another pair of electromagnetic coils. By virtue of the above-described arrangement, the unsolidified part of the cast strand is strongly stirred at two or more locations of the cast strand in the secondary cooling zone of the continuous casting machine and the occurrence of defects in the interior of the cast strand is prevented.
REFERENCES:
patent: 2877525 (1959-03-01), Schaaber
patent: 2963758 (1960-12-01), Pestel et al.
patent: 3746074 (1973-07-01), Baumann
patent: 3882923 (1975-05-01), Alberny et al.
Fujita Teruo
Yamada Katsuhiko
Yamada Naohei
Hampilos Gus T.
Shore Ronald J.
Sumitomo Electric Industries Ltd.
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