Powder compression molding machine

摘要

This invention provides a powder compression molding machine including: upper punches and lower punches disposed to face with each other along one central axis; die holes allowing tips of the upper punches and the lower punches to be respectively inserted thereinto, the upper punches and the lower punches being shifted to approach each other with the tips thereof being inserted in the corresponding die holes, so that a powder material filled in the die holes is compressed and molded; and powder lubricant spraying means for spraying a powder lubricant toward the die holes before the powder material is filled therein, wherein the powder lubricant spraying means includes: a downward spray nozzle that sprays the powder lubricant toward the die holes; a powder lubricant retrieving mechanism that retrieves a superfluous powder lubricant out of the powder lubricant sprayed from the powder lubricant spraying means; a charging device that electrostatically charges the powder lubricant sprayed from the downward spray nozzle; and switching means that is connected to the charging device and switches to allow only the powder lubricant sprayed at a timing of reaching each of the die holes to be electrostatically charged.