A conveyor for sand molds, wherein the molds are caused to move from the inlet end to the discharge end by forcing a mold onto the inlet end, thereby pushing a mold from the discharge end, once the conveyor is completely filled with molds. The conveyor is constructed of a plurality of stationary, spaced, longitudinal slats. Positioned intermediate some of the stationary slats are a plurality of movable slats. During operation, a lifting force is applied beneath the movable slats, which force is something less than that required to lift the string of molds off the upper surface of the stationary slats. This results in less force being necessary to move the mold string from the inlet end towards the outlet end of the conveyor, thus reducing the possibility of crushing or breaking the sand molds.