Patent ID: 8795586

Claim:
A method of producing a powder sintered product, consisting of the steps of: mixing a raw powder and a solid lubricant so as to form a powder for powder metallurgy; charging the powder for powder metallurgy having the raw powder and the solid lubricant incorporated therein into a mold; compacting the powder for powder metallurgy charged into the mold and molding a powder compact while heating the mold to a temperature in a range of 101 to 190° C.; releasing the powder compact out of the mold; and continuously molding the powder compact and sintering the powder compact, wherein the temperature of the mold is set to a value in the range of the boiling point of water or more to the melting point of the solid lubricant or less, and during a period after the raw powder and the solid lubricant are mixed to form the powder for powder metallurgy and before the powder for powder metallurgy is charged into the mold, the powder for powder metallurgy is cooled with a cooling device in which a cooling solution is circulated so as to maintain the temperature of the powder for powder metallurgy within a range of the boiling point of water or below in a situation where the mold is heated to a temperature in a range of 101 to 190° C. and the powder for powder metallurgy receives heat from the mold.