Swage for casting high-pressure plunger pump solid rotor and casting method for swage

The invention discloses a swage for casting a high-pressure plunger pump solid rotor and a casting method for the swage. The swage comprises an upper swage, a lower swage and a swage core, wherein a cavity for casting the solid rotor is formed among the swage core, the upper swage and the lower swage; the radial wall thickness of the swage core and the thicknesses of the upper swage and the lower swage are 5/18 to 7/18 of the maximum outer diameter of the solid rotor. The casting method comprises the following steps of (1) preheating: preheating the swage to 400-450 DEG C and preserving the heat; (2) pouring: steadily injecting iron liquid of spheroidal graphite cast iron into the cavity of the swage at the pouring temperature of 1,450-1,480 DEG C for 15-20 seconds until the iron liquid is completely solidified, and finishing casting of the solid rotor. According to the swage and the casting method, the radial wall thickness of the swage core and the thicknesses of the upper swage and the lower swage are desi