METHOD FOR MANUFACTURING POWDER SINTERED MOLDING, METHOD FOR MANUFACTURING FLUID ELEMENT, POWDER SINTERED MOLDING, AND CORE FOR MANUFACTURING THE POWDER SINTERED MOLDING

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a powder sintered molding, capable of integrally molding the powder sintered molding including a floating member floatably held in a hollow part, and integrally defatting/sintering.SOLUTION: A method for manufacturing a powder sintered molding includes: a floating member forming step of forming a floating member; a core forming step of forming a core 31 including a form corresponding to a hollow part and holding the floating member in a prescribed position in the hollow part; a core installation step of installing the core in a sintered material molding metal mold 32 for forming a sintered material molding 41; a sintered material molding step of filling a sintered material 40 including a heat-meltable binder and sintered powder in the sintered material molding metal mold by melting the binder; a defatting step of heat removing the binder; a core removing step of removing the core; and a sintering step of sintering sintered powder to form a sintered molding. In the floating member forming step, the floating member is formed of a material which is not changed in each of the steps, and in the sintering step, the sintered powder is sintered in a state of making the floating member floatable.