Compression molding die for large-size high-thickness grinding wheel

The utility model relates to a compression molding die for a large-size high-thickness grinding wheel. The die comprises a lower die ring, an upper die ring, a lower die core, an upper die core, an upper die plate and a lower die plate, the upper die ring is arranged at the upper end of the lower die ring; the upper die core is arranged at the upper end of the lower die core; the upper die plate and the lower die plate are each of a disc structure with a through hole in the center. The lower die core and the upper die core penetrate through the through holes of the upper die plate and the lower die plate, the lower die plate is fixedly connected with the inner wall of the bottom of the upper die ring, and cavities for containing grinding wheel forming materials are formed between the innerwalls of the lower die ring and the upper die ring, between the lower die core and the outer wall of the upper die core and between the bottom wall of the upper die plate and the top wall of the lower die plate. When the pre