Foundry molding installation for producing boxless sand molds

Abstract

A foundry molding installation for producing boxless (or flaskless) sand molds comprises a molding machine having a pattern plate (or match plate) for simultaneous molding of upper and lower bodies (or mold halves) and a shifting device for transporting a molded lower body to a transfer station and simultaneously returning to the molding station, for assembly with the upper body therein, a lower body which has been provided with cores. The cores are inserted at core insertion stations along the sides of a rectangular, closed circulation, roller track which is mainly disposed outside the molding machine. At the molding-machine end the track comprises a tandem shifting apparatus having a transfer station in common with that of the shifting device of the molding machine and being movable back and forth, over the shifting device, so as to return a cored lower body from one side of the track to the transfer station while feeding a fresh lower body to the other side of the track. At the other end of the track sides, the circulation of lower bodies is effected by a transfer carriage which runs on rails from one side to the other and incorporates a section of roller track matching that of the sides of the rectangle. The shifting device may be a turntable having recessed seatings for the lower bodies, a lifting apparatus being provided below the turntable for raising the body out of the turntable and into the tandem shifting apparatus.