COMPRESSION MOLD FOR PRESSING CYLINDRICAL ARTICLES OF POWDER Russian patent published in 1995 - IPC

FIELD: powder metallurgy. SUBSTANCE: compressed mold represents split elastic female die 3, where holder 2 is installed in guides 1. Powder is filled in the compression mold, and punchers 7 an 8 are installed in. When pressing forces are applied preliminary pressing by puncher 7 occurs, final pressing is performed by punches 6, 7, and 8 and female die 3. Rods 5 released of load are withdrawn out of guides 1 and intermediate cylinder 4. When pressing pressure is released, split elastic female die 3 comes out of the holder under forces of elastic strains, in so doing its size is increased, and that leads to automatic release of pressed article from squeezing stresses. EFFECT: high productivity. 2 cl, 1 dwg