METHOD FOR MOLDING POWDER MOLD PRODUCT

摘要

The present invention relates to a method for molding a powder mold product according to which a powder mold product of uniform quality can be molded with excellent productivity. The present invention includes the steps of: preparing raw material powder 3 (a preparing step); interposing a mold assembly-use lubricant between an outer circumferential face 12s of a first punch (a lower punch 12) and an inner circumferential face 10s of a die 10, the lower punch 12 and the die 10 in this state being relatively shifted to apply the mold assembly-use lubricant to the inner circumferential face 10s of the die 10 (an applying step); and packing the raw material powder 3 into a cavity, a powder mold product 100 being molded by the raw material powder 3 being pressed (a molding step). In the applying step, while the mold assembly-use lubricant is discharged from a supply port 12i provided to the lower punch 12 and the discharged mold assembly-use lubricant is collected from a drain port 12o provided to the lower punch 12, the mold assembly-use lubricant is applied to the inner circumferential face 10s of the die 10.

主权项

1. A method for molding a powder mold product, in which raw material powder is packed into a cavity formed by a first punch and a die capable of being relatively shifted, a powder mold product being molded by the raw material powder in the cavity being pressed by the first punch and a second punch, the method comprising:
a preparing step of preparing the raw material powder; an applying step of interposing a mold assembly-use lubricant between an outer circumferential face of the first punch and an inner circumferential face of the die, the first punch and the die in this state being relatively shifted to apply the mold assembly-use lubricant to the inner circumferential face of the die; and a molding step of packing the raw material powder into the cavity surrounded by the first punch and the die to which the mold assembly-use lubricant has been applied, a powder mold product being molded by the raw material powder being pressed by the first punch and the second punch, wherein in the applying step, while the mold assembly-use lubricant is discharged from a supply port provided to one of the die and the first punch and the discharged mold assembly-use lubricant is collected from a drain port provided to one of the die and the first punch, the mold assembly-use lubricant is applied to the inner circumferential face of the die.