Induction heated casting channel with graphite sleeve
AssigneePont-A-Mousson S.A.
InventorJoel Pamart
Life of this patent
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Abstract
A fusing furnace casting channel 13 is surrounded by an induction heating coil 17 embedded in a refractory lining 12. A graphite sleeve 20 having a refractory inner coating 16 defines the casting channel. The sleeve serves as a permanent, single turn secondary winding such that the channel may be preheated even when no molten metal is present in the channel, which would ordinarily act as the secondary winding or core. This enables the casting channel to be maintained at a high temperature between successive casting operations.
Claims4
A casting channel apparatus for molten metal including means defining a casting channel (13), a refractory lining (12) surrounding said channel, and a cooled induction heating coil (17) embedded in said lining and surrounding said channel over substantially its entire length, said coil being energized by an aperiodic electrical generator (19), characterized by:
- a multi-segment graphite susceptor sleeve (20) surrounding said channel over said coil wherein said casting channel and graphite sleeve both include a straight portion and an upwardly bent portion (14) leading to a casting orifice (15), the interior of said sleeve being covered with a continuing coating of refractory material defining a flow bed of said channel, said sleeve serving as a permanent secondary to enable the heating of said channel upon energization of said coil even in the absence of molten metal within said channel.
Dependencies are inferred from the claim text.