Patent ID: 6401798
Filing Date: 2002-06-11
Classification: B22C,Y10S

Abstract:
A molding sand reclaiming apparatus comprising:an agitation tank including a bottom provided with a plurality of ventilating ports and side walls provided with a charging port for used sand and a discharging port for reclaimed sand; a rotatable shaft disposed horizontally in said agitation tank for being driven by a driving force for rotation about a horizontal axis; a rotatable drum comprising a disk portion coaxially fixed to said rotatable shaft for rotation therewith about said horizontal axis and a cylindrical portion having an inner peripheral face connected to an outer periphery of said disk portion; said cylindrical portion of the rotatable drum extending horizontally beyond said disk portion to provide an open end of said cylindrical portion, a classification tank which communicates with an upper part of said agitation tank and is provided with a dust collecting port; and an air pressure source for supplying compressed air to said plurality of ventilating ports to fluidize the used sand charged in said agitation tank and classify in said classification tank, extraneous matter peeled off from the used sand by the action of said rotatable drum, and produce the reclaimed sand, said rotatable drum being immersed in said fluidized used sand, which enters the drum through said open ends thereof, to provide an accumulation layer of said used sand on said peripheral surface of said cylindrical portion of said drum which acts to produce friction with the fluidized used sand entering the drum and cause separation of said extraneous matter from the used sand.