Process for producing slabs from poured concrete

A process for producing slabs comprising the steps of hingedly mounting on vertical axes a plurality of spaced apart vertical plates forming side walls with each side wall having at opposite edges and opposite sides an integrally related lateral wall elements with lateral edges adapted to engage confronting surfaces of the respectively adjoining side walls, said hinged mounting being located at the intersection of the lateral wall elements and vertical plates along one side only of such plates, enclosing the spaces between the lateral edges of each of said plates by hingedly swinging the respective side walls into parallel relation and simultaneously bringing the opposite lateral edges at the opposite sides of said respective side walls into confronting contact with the opposing surfaces of adjacent side plates and thereby defining a plurality of spaces between the lateral edges of said plates to form a series of side-by-side compartments, clamping said vertical plates together to maintain the enclosure between the sides of said plates, filling the compartments with concrete substantially hardened therein to form slabs, and then releasing said slabs by serially swinging the vertical plates apart to release the completed slabs by separating such vertical plates.