METHOD FOR PRODUCING CEMENTED CARBIDE TOOL

PROBLEM TO BE SOLVED: To effectively achieve near net shape forming to reduce man-hour, costs of equipment, raw materials and the like, and time for construction. SOLUTION: A method for producing a cemented carbide tool composed of a fired body includes a raw material preparation step in order of raw material blending, mixing/granulation, and raw material completion and a forming-sintering-working step in order of CIP forming and sintering finishing. The method includes: during the CIP forming, charging a cemented carbide tool raw material 10 obtained in the raw material preparation step into an internal space S1 of a CIP die frame 1 provided with a core 11 made of a hollow cylindrical rubber and a hollow cylindrical metal outer case 12 arranged so as to surround the radial outside of the core 11 with a cutting edge die 15 for forming cutting edge in the inner circumferential face thereof, the internal space S1 being formed between the core 11 and the outer case 12; introducing a pressurized fluid into a space S2 formed in the radial inner side of the core 11 to expand the diameter of the core 11 in the radial outside to press form the carbide tool raw material 10; and then releasing the resulting formed body from the die. COPYRIGHT: (C)2010,JPO&INPIT