Method for removing organic deposits from sand particles with la

Details Method for removing organic deposits from sand particles with la Method for removing organic deposits from sand particles with la

1994-08-25

1996-01-09

Silbaugh, Jan H.

Cleaning and liquid contact with solids

Processes

Including application of electrical radiant or wave energy...

2191216, 21912166, 21912185, B08B 600, B23K 2600

Patent

active

054825610

ABSTRACT:
A method and system for removing organic deposits from the surface of sand particles. The organic deposits include molding compound and carbonaceous materials which are deposited on sand particles during their use in foundry operations. The organic deposits are exposed to a laser beam having a wavelength which is selectively absorbed by at least a portion of the organic deposits, while being essentially transmitted by the sand particles. The organic deposits are selectively heated by the laser beam resulting in vaporization and/or decomposition of the deposits without significant heating of the underlying sand particles.

REFERENCES:
patent: 4756765 (1988-07-01), Woodroffe
patent: 5024968 (1991-06-01), Engelsberg
patent: 5151134 (1992-09-01), Boquillon et al.
patent: 5151135 (1992-09-01), Magee et al.

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