Patent ID: 7585165

Claim:
A powder molding die apparatus for powder molding, comprising: a die with a through-hole for forming a side of a compact, the through-hole being defined vertically through an upper surface of the die; a lower punch to be fitted into the through-hole from beneath; an upper punch to be fitted into the through-hole from above; a lubricant applying means for applying a lubricant to the through-hole, said lubricant applying means allowing the lubricant to be applied to the through-hole prior to filling a Fe-based or Cu-based raw powder in the through-hole from above, with the lower punch being fitted therein, so that the upper punch is allowed to be fitted into the through-hole after filling the through-hole with the raw powder to form a compact, wherein the through-hole is surface-treated to have a hydrophilic property and formed so as to have a smaller angle of contact with the lubricant than an angle of contact of the die itself with the lubricant.