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US 5,439,044 AGranted
Method of regenerating foundry sand
OwnerDietmar Boenischinventor
Life of this patent
Estimating the term…
Abstract
A foundry sand is regenerated in an upright chamber to which air is admitted at the junction between a peripheral wall and between while an abrating rotor is in a horizontal plane close to the bottom to establish a vertical line with columns of fluidized sand outwardly of the orbit of the rotor.
Claims14
A method of regenerating foundry sand, comprising the steps of:
- (a) circulating depleted foundry sand in an upright dry abrading chamber by causing said foundry sand to descend centrally onto a horizontal rotating abrading tool, displacing said foundry sand outwardly with said tool and inducing said foundry sand to rise in said chamber exclusively outwardly of an orbit of said tool to a level of foundry sand in said chamber;
- (b) admitting air to said chamber at a bottom of said chamber exclusively outwardly of said orbit to fluidize a rising column of said foundry sand outwardly of said orbit;
- (c) removing a dust-laden air above said level of said foundry sand in said chamber;
- and
- (d) enabling nonfluidized foundry sand at said level to pass inwardly to a downward dense nonfluidized central stream of said foundry sand descending to said horizontal abrading tool.
2 more elements
Dependencies are inferred from the claim text.