Dispensing – Molten metal dispensing – Flow controllers or assists
Patent
1988-09-27
1990-09-04
Seidel, Richard K.
Dispensing
Molten metal dispensing
Flow controllers or assists
164337, 164437, B22D 3700
Patent
active
049537610
ABSTRACT:
The instant invention is directed to a stopper rod spatial control mechanism for use in combination with a bottom discharge holding reservoir for molten metal having a nozzle. The mechanism comprises a base, an outer tube and an inner tube. The outer tube has a longitudinal axis which is perpendicular to the base. The outer tube is swingably mounted about an axis parallel to and spaced away from the longitudinal axis. The inner tube is telescopically mounted within the outer tube. The inner tube is reciprocally movable along the longitudinal axis and is rotatable about the longitudinal axis. A servomotor is mounted at a lower end of the outer tube. A ball screw is connected to and rotated by the motor. A ball nut is affixed to the inner tube and cooperates with the ball screw. A boom having a first end and a second end is affixed to the inner tube adjacent its first end and rotates with the inner tube about the longitudinal axis. A stopper rod depends from the second end of the boom. A brake is affixed to the base and cooperates with the boom. The stopper rod is aligned with the nozzle by the combined movements of rotating the inner tube about the longitudinal axis and swinging the outer tube about the axis parallel to said longitudinal axis. Once the stopper rod is aligned, the position of the stopper rod is fixed by the brake. Thereafter, reciprocal movement of the stopper rod above the nozzle is controlled by the actuation of the servomotor.
REFERENCES:
patent: 2753606 (1956-07-01), Fogt
patent: 3627180 (1971-12-01), Montgomery
patent: 3762605 (1973-10-01), Seaton
patent: 4196829 (1980-04-01), Seaton
patent: 4410112 (1983-10-01), Fasano et al.
patent: 4744407 (1988-05-01), Fishman et al.
Burk John P.
Fishman Oleg
Prabhu Satyen N.
Tabatabaei Emad
Brown Edward A.
Inductotherm Corp.
Seidel Richard K.
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