In the slinging operation, the consolidation and ramming are obtained by the impact of sand which falls at a very high velocity.
The overhead impeller head consists of the housing 1 in which the blade 2 rotates at a very high speed. The sand is delivered to the impeller through the opening 3 by means of conveyor buckets. The impeller head by the rotation of the blade throws the sand through the outlet 4 down into the flask over the pattern at a rate ranging from 500 to 2000 kg per min. The density of the sand can be controlled by the speed of the blade.
Mold produced by the method having adequate strength, since hardness is a function of sand velocity, which is controllable in a sand slinger . These machines are most often used for ramming medium-size to large molds.
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