Method of manufacturing extruded structural profiles from aluminum based metal scraps

A method of manufacturing extruded structural profiles from aluminum based metal scrap materials comprising;

• passing and lapping the aluminum based scrap materials through and between rollers to form a laminated sheet plate,
• breaking the laminated sheet plate into chip materials,
• heating the chip materials to a temperature sufficient to effect a hot press and a hot extrusion,
• charging the heated chip materials into a press housing,
• evacuating the interior of the press housing to exhaust air from between and about the chip materials,
• compacting the chip materials into a substantially cylindrical body in the press housing by applying a pressure force to the chip materials in the press housing in the range of about 0.4 to 2 ton/cm.sup.2, the cylindrical body having a density greater than 70 percent of that of an aluminum material,
• inserting the compacted body of chip materials into an extruder housing,
• disposing a blind die in air-tight relation with the extruder housing,
• evacuating air from in and about the body of chip materials and in the extruder housing while the blind die lies in such air-tight relation with the extruder housing so that the reduced pressure in the housing is in the range of about 20 to 50 mmHg.
• replacing the blind die by an open die having a desired extruder opening therein under the evacuated condition in the interior of the housing,
• compressing the cylindrical body into a semi-solid consolidation body to be deformed in air-tight contact with the extruder housing, and
• extruding the semi-solid consolidation body through the extruder die opening to form the desired shape.