Rapid forming and manufacturing method for casting sand mold

The invention discloses a rapid molding and manufacturing method for a casting sand mold, which comprises the following steps of: drawing a three-dimensional CAD (Computer Aided Design) model of the sand mold; slicing and layering are conducted according to the sand mold three-dimensional CAD model, detailed section contour information of each layer is obtained, and the slicing layer thickness is set according to the part manufacturing precision requirement; preparing a sand mold printing material; preparing an adhesive material; an adhesive material is sprayed to the surface of the sand mold printing material through a spray head of 3D printing equipment, and then layer-by-layer sand paving printing is carried out; a sand mold blank is obtained; the sand mold blank is subjected to standing, and then impurities are removed; heating the sand mold blank, and then standing and cooling to room temperature; carrying out surface treatment on the sand mold blank, wherein the surface treatment comprises etching and p