Knockout Machine is designed to separate sand and castings from mould box. The Knockout Machine consists of a top deck, made out of thick steel plate & having net mesh of bars & flats, which together with top rugged fabricated frame floats on heavy duty springs resting on a supporting structure. The floating top frame is made to shake violently either by an Eccentric shaft drive mechanism or by Vibro-motor system. On the basis drive mechanism it has two types of knockout machine.