Patent ID: 7784526

Claim:
A molding apparatus comprising: a rotary frame mounted on a supporting shaft, for vertical rotation in a vertical plane; a pair of opposing cope and drag flasks mounted on the rotary frame, each flask having a sand-introducing port in a sidewall thereof; flask-moving means for moving the pair of flasks so that the flasks approach each other and are spaced apart for creating molding spaces and for stripping; a sand-introducing device holding molding sand therein, for introducing the molding sand in the pair of opposing flasks through the sand-introducing ports thereof, and squeeze means for defining the molding spaces together with the approaching opposing flasks and a match plate sandwiched therebetween, and for squeezing the molding sand filled in the opposing flasks; wherein the molding sand is introduced into the molding spaces while the molding spaces are tilted about a vertical line, wherein the sand-introducing device includes means for supplying pressurized air and has a body acting as a double-walled pressure tank structure with a wall of the body and an air-permeable porous partitioning plate made of a porous hydrophobic resin defining a chamber therebetween, and wherein while the molding sand in the sand-introducing device is fluidized by pressurized air injected from the pressurized air supplying means into the chamber of the pressure tank structure and through the air-permeable porous partitioning plate, the molding sand is introduced into the molding spaces.