. Canadian foundryman (1918). the costly core sand out of oilcores. If it were possible to reclaimthe sand for re-use, it would mean asaving in not only the sand alone, butalso a considerable amount of binder,and furthermore freight charges, timeand labor. The first method of reclaiming thissand is employed where small lightcores are used, such as in radiatorcolumns and similar work. These corescould not be taken out of the castingswhole; but by the process of tumblingthese castings with the cores in exhausttype tumblers, this core sand can beremoved quickly and at very little ex-pense. For th
. Canadian foundryman (1918). the costly core sand out of oilcores. If it were possible to reclaimthe sand for re-use, it would mean asaving in not only the sand alone, butalso a considerable amount of binder,and furthermore freight charges, timeand labor. The first method of reclaiming thissand is employed where small lightcores are used, such as in radiatorcolumns and similar work. These corescould not be taken out of the castingswhole; but by the process of tumblingthese castings with the cores in exhausttype tumblers, this core sand can beremoved quickly and at very little ex-pense. For this purpose a separator is in-stalled on the dust main where all thegood core sand is deposited, while thedust and burnt sand passes on into thedust arrester. Sufficient pressure onthe exhaust fan must be provided to liftthe heavy sand into the separator, andthis suction of a greater velocity thanusual also has the advantage of clean-ing the work faster. The second method is employed onheavier cores, such as are used in auto-. THE AUDITORIUM AT MILWAUKEE WHERE THE AMERICAN OUNDRYMENS ASSOCIATION AND THE AMERICAN INSTITUTE OF METALS WILL BE HELD DURING THE WEEK OF OCT 7. 1918. 150 CANADIAN FOUNDRYMAN Volume IX. mobile castings and similar work. Coresof this nature generally are shaken outand are not broken up to any great ex-tent. The W. W. Sly ManufacturingCo., Cleveland, Ohio, has designed andput on the market a core crushing millas illustrated herewith, into which thecores are fed by hand or some mechani-cal device through the large hollowtrunnion. A light crusher on the insideof the barrel grinds the cores, and the shop for additional ventilation in sum-mer and a saving of heat in cold weath-er; they also increase the sanitary con-ditions in foundries and are highly ap-proved of by factory inspectors in theStates. The above mentioned core sand mill isalso used in steel foundries for the solepurpose of reclaiming nails, wires andother metal out of the used mouldingsand and fou
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