Sand mold for forming PU seat foaming mold

The utility model relates to the field of sand molds, in particular to a sand mold for forming a PU (polyurethane) seat foaming mold, which comprises an upper sand mold component and a lower sand mold, the upper sand mold component comprises an upper sand mold seat, a reinforcing plate component and an embedded part, a cavity is arranged at the bottom of the upper sand mold seat, the top of the lower sand mold is arranged in the cavity, and the reinforcing plate component is arranged in the cavity. A reinforcing plate assembly is arranged above the upper sand mold seat, a mold cavity is formed between the upper sand mold seat and the reinforcing plate assembly, the embedded part is arranged in the mold cavity, the reinforcing plate assembly comprises a plurality of transverse reinforcing plates and longitudinal reinforcing plates which are arranged in parallel, and the transverse reinforcing plates and the longitudinal reinforcing plates intersect with each other. The casting mold is simple in structure and s