APPARATUS FOR CONTINUOUS PRESSING OF TUBES FROM PELLETS Russian patent published in 1994 - IPC

FIELD: pressing of tubes from pellets. SUBSTANCE: method involves filling two passes with heated pellets; providing rotation of rolls 1 and 3, which causes entrainment of pellets by pass walls, reduction and displacement of pellets to stops ( with passes having decreasing height and closing across section in common axis of rolls, i.e. all sides of pass acquire drawing capacity); providing further displacement of blank to stops, with metal of pellets being released and expelled from passes into channels and further delivered into welding chamber 12; providing joining of metal flows in welding chamber 12, welding and extruding through metering hole of die 13 in the form of tube. EFFECT: reduced power consumption and increased mechanical properties of tubes. 5 dwg, 1 tbl