| 简介 |
PROBLEM TO BE SOLVED : To provide a powder molding method capable of preventing the occurrence of defects such as chips, flaws and cracks in a molded body by using a powder lubricant, thereby performing a continuous molding for a long period of time. SOLUTION : The powder molding method comprises : a process where a powder lubricant is pressure-fed to a cavity 15 composed of a die 11 and a lower punch 14 with a carrier gas; a process where the gas is pressure-fed to the cavity 15, and the surplus powder lubricant is removed to the outside of the cavity 15; a process where a prescribed amount of powder composition is fed into the cavity 15; and a process where the powder composition fed into the cavity 15 is subjected to press molding by an upper punch 13 and the lower punch 14. In the process where the powder lubricant is pressure-fed with the carrier gas, a part of the powder lubricant is passed through a clearance between the die 11 and the lower punch 14. COPYRIGHT : (C)2008, JPO&INPIT |
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