A method of manufacturing a radial flow ceramic turbine rotor

摘要

A method of manufacturing a radial flow turbine rotor is disclosed, which comprises the steps of injection molding a rotor body including a conical shaft (1) and a plurality of blades (2) formed on the periphery of the shaft (1) and at an angle to the axis of the shaft (1) from a ceramic material using a mold having parting lines corresponding to the blade edges such that projections (5) are formed on the blade edges, sintering the molding thus obtained, and grinding the edge surfaces (6) of the blades facing a casing. The blades (2) are thus provided with projections (5) on their inlet and outlet edges (3) and (4) which face a fluid passage.