AGGREGATE FOR POWDER PIECES IMPACT PRESSING Russian patent published in 1995 - IPC

FIELD: powder metallurgy. SUBSTANCE: pressing stamp with die is preliminary heated by inductor up to 350 - 400 C. Metal-ceramic powder is loaded in bunker. Using electric drive, rotor multiplace holder is rotating till its loading opening matches bunker window and is filled with powder. Powder is transferred in pressing stamp. Electrodes of preliminary pressing, using rocking lever, are lowering upper punch in pressing stamp, pushing powder in die. Then power is switched on and from transformer voltage of 100 V (50 hz) is fed to stator windings of electric hummer, block head is lifted and held in extreme upper position by electric magnet. During next switch of power of windings block head moves on guides down with speed of 7 - 25 m/s, making impact on upper punch of pressing stamp. During impact action simultaneous pressing and sintering of pellets takes place. EFFECT: aggregate is safe in operation, simple and allows to have ecologically pure production. 1 dwg