Core rod for forming a cylindrical green compact, apparatus for forming a cylindrical green compact, and method for forming a cylindrical green compact

A core metal mold for press-powder molding of a cylindrical component, a press-powder molding device and a press-powder molding method are disclosed, in the press-powder molding of the cylindrical component which uses step core metal mold, includes cylindrical shape and an axially protruding protrusion part or a radial recession part at inner circumferential side, corner rupture does not take place even if curvature radius of a step part and the corner of a side part continuous to the step part is reduced. The core metal mold for press-powder molding is used for press-powder molding of the cylindrical component which includes cylindrical shape and the axially protruding protrusion part or the radial step part at the inner circumferential side; at least a part of circumferential surface of the core metal mold body includes the radially protruding step part, the core metal mold body is divided into upper and lower two portions at a surface coplanar to the upper surface of the step part, and the divided surfaces