Method and apparatus for containing and ejecting a...

Details Method and apparatus for containing and ejecting a... Method and apparatus for containing and ejecting a...

2005-08-23

2005-08-23

Kastler, Scott (Department: 1742)

Metallurgical apparatus

Means for melting or vaporizing metal or treating liquefied...

With means to discharge molten material

C266S241000

Reexamination Certificate

active

06932938

ABSTRACT:
A container system including a vessel for holding a thixotropic semi-solid aluminum alloy slurry during its processing as a billet and an ejection system for cleanly discharging the processed thixotropic semi-solid aluminum billet. The crucible is preferably formed from a chemically and thermally stable material (such as graphite or a ceramic). The crucible defines a mixing volume. The crucible ejection mechanism may include a movable bottom portion mounted on a piston or may include a solenoid coil for inducing an electromotive force in the electrically conducting billet for urging it from the crucible.During processing, a molten aluminum alloy precursor is transferred into the crucible and vigorously stirred and controlledly cooled to form a thixotropic semi-solid billet. Once the billet is formed, the ejection mechanism is activated to discharge the billet from the crucible. The billet is discharged onto a shot sleeve and immediately placed in a mold and molded into a desired form.

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“Semisolid Metal Process Eliminates Preformed Billets”, by Samuel D. Norville,Die Casting Management,March 1998, pp. 31-33.

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