The invention belongs to the technical field of
casting, and discloses a rapid mold-free
casting manufacturing method. The method comprises the steps that the temperature of
molding sand is decreased to range from minus 40 DEG C to minus 10 DEG C, a computer controls a working platform to move downwards by a certain distance and lays a layer of frozen bottom sand at the low-temperature environment, then, the working platform moves downwards by one
layer thickness, a layer of low-temperature
molding sand is laid, the computer controls sprayers to spray water or a water solution according to the cross-section shape of the current layer cast mold, and the sand mold is solidified; and printing is performed layer by layer, and a
casting mold is obtained. The invention further provides a 3D printing ice-mold casting sand mold device. The device comprises a low-temperature molding chamber, the liftable working platform, a
powder spreading device and a two-dimensional
motion system. Array nozzles connected with a liquid supply
system are installed on the two-dimensional
motion system and spray water or the water solution. A feeding
system is used for providing low-temperature
molding sand. The
casting mold manufactured by adopting the method has the beneficial effects of being environment friendly, high in manufacturing speed, low in cost, low in gas generating amount, free of deformation and the like and has the popularization and usage value.