Abstract: An extrusion die for extrusion of metal has a passageway with a bearing section having parallel bearing surface portions in the direction of extrusion which extend inwardly from an inlet opening a variable distance based upon the size of the gap at such portions and a relief section downstream from said bearing section and having relief surface portions tapering away from said bearing surface portions in the direction of extrusion, said relief surface portions following a straight-line path.

Abstract: A method for reclaiming aluminum scrap containing thermal barrier material in a non-polluting manner comprising the steps of comminuting the scrap to relatively short pieces, conveying the comminuted scrap to a storage hopper, feeding the comminuted aluminum scrap product to a fluidized bed furnace, heating the scrap to a predetermined temperature for a sufficient amount of time to reduce the thermal barrier material and any other undesirable material in the scrap to combustible gas and cinder to produce a satisfactory aluminum melt furnace feed product, and then feeding the treated scrap product to an aluminum melt furnace and further processing. The method may be either a batch one or a continuous one.

Abstract: A method for recycling aluminum scrap containing thermal barrier material comprising the steps of comminuting the scrap to short pieces of a predetermined length, conveying the comminuted aluminum scrap to a storage hopper, continuously feeding comminuted aluminum scrap product to an indirect-fired rotary kiln, heating the scrap to a predetermined temperature for a sufficient amount of time to reduce the thermal barrier material in the scrap to combustible gas and cinder and produce a satisfactory aluminum melt furnace feed product, collecting and burning the combustible gases and vapors in a waste heat recovery afterburner to provide sufficient heating values for the scrap heating step, and then feeding the treated scrap to an aluminum melt furnace for melting and further processing.

Abstract: An improved curtain wall or wall system for building construction is provided which employs a unitary thermal barrier or thermal break vertical mullion. The novel unitary vertical thermal barrier mullion comprises metal exterior and interior vertical members uniquely joined together, and an insulating medium, or member further joining and separating the metal members. The members are so constructed that a fail-safe condition is provided which prohibits complete separation of the metal members should the insulating member or medium subsequently lose its structural integrity. The shape of the mullion may be varied without changing the construction providing the fail-safe condition.