METHOD FOR FORMING COMPACT FROM POWDER AND MOLD APPARATUS FOR POWDER FORMING

摘要

A method for forming a compact from a powder wherein a forming portion (1A) formed in a mold body (2) is filled with a raw material powder and upper and lower punches (3, 4) are inserted into the forming portion (1A), to thereby form the compact, characterized in that before the portion is filled with th e raw material powder (M), a uniform solution (L) of a lubricant in a solvent is attached to the peripheral surface of the forming portion (1A) and then the solution (L) is subjected to evaporation, to thereby form crystals on the surface of the forming portion (1A) and provide a crystallized layer (B). Th e layer (B) is a coating film of the lubricant closely formed on the periphera l surface of the forming portion (1A) and allows the reduction of the force required for drawing a powder compact (A) out of the forming portion (1A) an d the enhancement of the density of the compact (A) from a powder, which resul ts in the achievement of the continuous and stable production of a compact from a powder having an enhanced density.