Wax mould for investment casting of dry screw vacuum pump rotor

The utility model discloses a wax mold for investment casting of a dry screw vacuum pump rotor, and belongs to the technical field of investment casting. The pouring gate forming column and the riser forming block are fixedly connected with the wax mold body, the pouring gate forming column is arranged in the axial direction of the wax mold body, one end of the pouring gate forming column is fixedly connected with one end of the wax mold body, the other end of the pouring gate forming column is higher than the wax mold body, and the riser forming block is fixedly connected with the other end of the wax mold body. According to the wax mould for investment casting of the rotor of the dry-type screw vacuum pump, vertical casting of the rotor is achieved, during casting, molten iron enters the cavity from the bottom of the cavity, gas in the cavity is exhausted through the riser at the top, a ceramic mould manufactured through the wax mould for investment casting of the rotor of the dry-type screw vacuum pump can