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US 4,614,225 AGranted
Magnetic rotor for the continuous casting of hollow bodies
AssigneeVallourec
InventorsRoland Ernst, Marcel Garnier, Michel Giroutru, Rene Moreau
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AssigneeVallourec
InventorsRoland Ernst, Marcel Garnier, Michel Giroutru, Rene Moreau
Estimating the term…
The process and the device according to the invention relate to the continuous casting of hollow bodies made of metals such as aluminum, copper, steels of all types or other metals or alloys. The process involves introducing the liquid metal into an annular space between an external mold and an internal mandrel, the liquid metal being subjected in the vicinity of the mandrel to the action of a moving magnetic field which drives it upward. This field is created by a magnetic rotor housed in the mandrel comprising a rotating part around which is arranged at least one spiral made of magnetized magnetic material made integral with the rotor by at least one collar. The process is applied, in particular, to the production of blanks intended for the manufacture of seamless tubes.
A magnetic rotor for the continuous casting of hollow bodies, said rotor permitting a moving magnetic field to be produced which traverses the wall of a mandrel inside which the rotor is housed, and wherein said field acts on the liquid metal surrounding the mandrel, creating forces which move this liquid metal, the improvement including a drive means for rotating the rotor about its axis, said rotor comprising a rotatable cylinder formed of a magnetic material, a magnetised magnetic material arranged in at least one spiral around said rotatable cylinder, and including a collar formed of a material containing natural or synethetic fibers, said collar covering the magnetised magnetic material whereby said magnetised magnetic material is made integral with the underlying rotatable cylinder.
A magnetic rotor according to claim 17 wherein the magnetic material is a metal or alloy such as a mild steel or a carbon steel.
Dependencies are inferred from the claim text.