METHOD OF MAKING ARTICLES BY BACKWARD EXTRUSION AND APPARATUS FOR PERFORMING THE SAME Russian patent published in 1997 - IPC

FIELD: backward extrusion. SUBSTANCE: billet is extruded at placing die and compacting disc onto its ends with use of pressure sleeve and hollow plunger. Process is realized in container mounted in rotating extruding head after preliminarily charging to said container unit consisting of die, billet and compacting disc with use of cylindrical mandrel. Article is separated from scraps by cutting off at rotating mandrel. Apparatus for extruding includes one or more containers mounted with possibility of coinciding their axial openings with extrusion axis on extruding turret head. Apparatus is provided with means for assembling said unit consisting of die, billet and compacting disc outside container, reservoirs for receiving scraps, mandrel with shoulder and drive for moving shoulder towards die and for rotating mandrel at cutting off article from scraps. EFFECT: enhanced efficiency of method, improved design of apparatus. 16 cl, 12 dwg