METHOD FOR PRODUCING IMPELLER APPLIED TO SUPERCHARGER

An impeller comprising a wheel portion extending in an axial direction and a plurality of blades arranged around the wheel portion is produced by assembling a mold divisible into a plurality of parts having a cavity adapted for forming an outer profile of the impeller, injecting a kneaded matter including powder of a metal or a ceramic and binder to mold a green body, degreasing and sintering the green body to obtain a sintered body, embedding the sintered body into a die having a cavity adapted for modifying the outer profile of the impeller, and pressurizing the die to modify the outer profile of the impeller.