Metal founding – Process – Including recycling of process material
Patent
1982-02-22
1984-03-13
Hampilos, Gus T.
Metal founding
Process
Including recycling of process material
164412, 241275, 241DIG10, B02C 1912
Patent
active
044361386
ABSTRACT:
A reclamation apparatus comprising a centrifugal apparatus for removing impurities from sand by abrasion and entrainment. The apparatus is used to reproduce old molding sand so as to be useable again in making molds and, comprises a cylindrical body including an old sand feed hopper and a dust attraction opening in its upper part, an open-top rotary drum in its central part and a reclaimed sand discharge opening in its lower part. The old sand supplied through the feed hopper is distributed uniformly along the peripheral portion of the bottom plate of the rotary drum by means of a distributor, and the rotary drum is rotated at a high speed to cause a shearing phenomenon in the layer of sand and cause the sand to scatter over the peripheral wall of the drum. A scattered sand retaining and collision rack formed into a C-shape is provided in the cylindrical body so as to enclose the top of the outer periphery of the drum at a predetermined space or distance therefrom, whereby the scattered sand is partially caused to flow downward through the rack and the space between the drum and the rack while the other part of the sand is caused to flow over the top of the rack causing the sand to fall peripherally around the rack. The fine particles divided and included in the sand are blown off by a jet of air and discharged through the dust attraction opening, thus discharging the reclaimed sand through the lower discharge opening.
REFERENCES:
patent: 2707314 (1955-05-01), Horth
patent: 3175686 (1965-03-01), Rieth
patent: 3834631 (1974-09-01), King
patent: 3970257 (1976-07-01), MacDonald et al.
Batten, Jr. J. Reed
Hampilos Gus T.
Meller Michael N.
Nippon Chuzo Kabushiki Kaisha
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