Large fixed pitch propeller casting riser structure and manufacturing method thereof

The invention discloses a large fixed pitch propeller casting riser structure. The large fixed pitch propeller casting riser structure comprises a riser, riser surrounding sand, a core tube and a plurality of splitter plates, wherein the riser surrounding sand surrounds the riser; the core tube is positioned in the center of the riser; the splitter plates are respectively connected with the surrounding sand and the core tube; and the riser is equally divided by the splitter plates to form a plurality of partitions. As a preferred embodiment, each splitter plate comprises an aluminium silicate board on the inner layer and a common carbon steel board on the outer layer. Because the technical scheme is adopted, the invention discloses the large fixed pitch propeller casting riser structure; and the riser is directly divided into a plurality of parts in a riser casting molding process, the feeding effect of the riser is not changed, after being cut off and removed from a large end of a propeller, the riser can be