Rotary Powder Compression Molding Machine

A rotary powder compression molding machine wherein:

• a turret is rotatably mounted in a frame via a vertical shaft;
• dies each having a die bore are mounted on the turret;
• an upper punch and a lower punch are vertically slidably held above and below each of the dies;
• and with tips of respective of the upper and lower punches being inserted in the die bore, the upper and lower punches are pressed and moved toward each other to compression-mold powder filled in the die bore between a lower end face of the upper punch and an upper end face of the lower punch,
• the rotary powder compression molding machine characterized by comprising powder lubricant jet means for jetting powder lubricant against the end faces of respective of the upper and lower punches and against the die bore prior to filling of the powder into the die bore,
• the powder lubricant jet means comprising:
• a first jet nozzle configured to jet the powder lubricant placed at a powder lubricant jet position substantially toward the end face of the upper punch;
• a second jet nozzle configured to jet the powder lubricant placed at a powder lubricant jet position substantially toward the end face of the lower punch;
• and a charger device configured to charge the powder lubricant electrostatically upon jetting from each of the first and second jet nozzles, the charger device being capable of rendering the powder lubricant to be jetted against each of the lower punch and the die different from the powder lubricant to be jetted against the upper punch in electrostatically charged condition.