Method of producing composite extruded aluminum products from aluminum swarf
AssigneeAisin Seiki Kabushiki Kaisha
InventorsMitsuyuki Isogai, Kouiti Tikusa, Yosihiko Nakamura
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Abstract
Particulate aluminum or aluminum alloy swarf or waste is compressed under heat and pressure to form a billet. After subjecting the billet to a subsequent heat treatment at a higher temperature the billets are capable of being extruded by conventional extrusion apparatus. A conventional preheated billet of cast aluminum or aluminum alloy can be placed in the extrusion apparatus between the die plate and the preheated billet of aluminum or aluminum alloy swarf so that upon extrusion through the die orifice the compressed swarf billet and the conventional billet will comprise the core and coating portions of the product respectively.
Claims3
A method of extruding composite products having a core and an external sheath comprising heating a die plate, pressure plate and an extrusion container at a constant temperature, compressing aluminum swarf into a billet having a bulk specific gravity of 1.4 to 201 preheating a billet of cast aluminum and said billet of compressed aluminum swarf to a temperature higher than the temperature of said die plate, pressure plate and extrusion container, placing said billet of cast aluminum in said container adjacent said die plate and placing said billet of compressed aluminum swarf between said billet of cast aluminum and said pressure plate, and forcing said billets through an extrusion orifice in said die plate to form an elongated extrusion having a core of said aluminum swarf and a covering of said cast aluminum.
Dependencies are inferred from the claim text.