Powder pressing apparatus and powder pressing method

摘要

A powder pressing apparatus comprises an upper punch (16) and a lower punch for compression of a powder in a cavity formed in a through hole (12) of a die (14). A gap between a side surface of the lower punch (18) and a side surface of the through hole (12) of the die (14) is sealed by a sealing member. A lubricant is supplied with a gas from a nozzle in the side surface of the lower punch (18) to the side surface of the through hole, and the lubricant applied to the side surface of the through hole (12) is spread by an absorbing member (48). The cavity is filled with the powder while the cavity is under suction by a reduced pressure provided from the nozzle in the side surface of the lower punch. During the suction, a filtering member provides filtration for the lower punch not to draw the powder in. <IMAGE>