METHOD OF EXTRUSION OF SECTIONS OUT OF ALUMINUM ALLOYS Russian patent published in 2003 - IPC

FIELD: plastic metal working. SUBSTANCE: method of extrusion of sections out of aluminum alloys incorporates steps of heating and deformation of cylindrical billets with division of extruded material into separate flows through outlet holes of die and their welding together at outlet from die to a single extruded section, in so doing separate flows of extruded material are formed by two or more cylindrical billets, overlapping by outlet edge of each cylindrical billet the appropriate zone of inlet holes of die, and then their simultaneous pressing-out and further synchronous extrusion with equal force are carried out. EFFECT: extension of service life of dies by 1.5-2 times and reduction of force of extrusion by 4-5 times, that allows composite sections to be manufactured in the shape of hollow panels with multiple internal partitions in low-duty extrusion press. 4 dwg, 1 ex