Swiss Aluminium Ltd.

Alusuisse Technology & Management Ltd.

Alcan Technology & Management Ltd.

Prolizenz Ag

Martin Bolliger

Kurt Buxmann

Wolfhart Rieger

Ernst Huber

Ivan Gyongyos

Miroslaw Plata

Pius Schwellinger

Kurt Neufeld

Christophe Bagnoud

Gregoire Arnold

Gr&eacute;goire Arnold

Willi Kerth

An extrusion device for manufacturing a profile from an extrusion block ( ), which is at least in part of metallic material, contains a container ( ) with container bore ( ) to accommodate an extrusion block ( ), a stem ( ), a shaping chamber and/or a shaping die ( ) and a heating facility ( ) arranged between the container bore ( ) and the die ( ). The heating facility ( ) contains a heating chamber ( ) in the form of a hollow metal tube featuring at least a first and a second heating section ( ) with heating chamber walls ( ) and means ( ) for inductively heating the heating chamber walls ( ). The first heating section ( ) exhibits a larger cross-sectional diameter than the&mdash;with respect to the direction of extrusion x&mdash;second heating section ( ), forming thereby a step-like narrowing in cross-section.

Device for manufacturing a metal profile

In a process for the manufacture of a shaped bar consisting of an at least partially metallic material, a preform is shaped to form the shaped bar in the partially solid/partially liquid state and the shaped bar in the partially solid/partially liquid state is guided through a chilled mould for setting. An optionally heatable preform chamber is provided for receiving the preform, an optionally heatable forming chamber is connected to the preform chamber for shaping the preform to form the shaped bar, and a chilled mold is connected to the forming chamber for the setting of the shaped bar. A die can optionally be arranged immediately downstream of the mould for the final shaping process and the device.

Process for extruding a metal section

In an apparatus for the continuous casting of metal, especially with a casting machine having circulating molds, the metal flows as a melt out of a nozzle, if appropriate with a nozzle mouthpiece, between molds and solidifies between side-limiting elements. The mouthpiece has adjoining it on each of its two sides a baffle which is followed in the casting direction by a cooling block. Between the baffle and cooling block there is a gap through which a gas can be blown into a corner region formed by the baffle, cooling block and melt, this gas forming a gas cushion in this corner region. The throughflow width of the molten metal between the baffles located opposite one another can be changed as a result of the movement of the baffles in the direction. The same applies to the width of the cooling blocks located opposite one another.

Apparatus and method for the continuous casting of metal

A nozzle which can be used repeatedly for the supply of liquid metal is made up of individual, hollow, refractory sections fitted together side by side in a metal frame. The hollow elements of the nozzle may feature, in addition to at least one longitudinal channel for the supply of liquid metal, channels to accommodate heating elements also running in the longitudinal direction.

Nozzle for strip casting

A process and nozzle for the continuous casting of molten metal to the mold of a caterpillar track type mold wherein the distance of the nozzle from the moving mold belts is regulated during the casting operation by altering the temperature at a plurality of places inside the nozzle body and/or by creating a pressurized gas cushion at a plurality of locations between the nozzle and the moving mold belts. The nozzle for feeding molten metal to the mold includes heating elements for altering the temperature of the nozzle and, if desired, at least one gas channel for forming a gas cushion between the nozzle and the moving mold belts.

Regulating distance between nozzle and caterpillar type mold in process

A mold for casting metals is provided with a roughened surface so that, on first contact of the mold with the melt, heat transfer is controlled in such a way that the melt comes into contact only with the peaks of the projections on the mold surface and an air gap is formed between the melt and the valleys on the surface. The pattern of roughness on the mold surface comprises a uniform arrangement of pyramidal or blunted-cone shaped projections. Neighboring projections are spaced a distance d of 0.05 to 1 mm apart and have a height h of 0.1d&lt;h&lt;d. The pyramid or blunted con surfaces satisfy the condition of 0.05&lt;.function./d.sup.2 &lt;0.5. A process which does not involve deformation is preferred for producing the rough pattern, for example, a photochemical etching process. The molds are suitable for many casting processes, in particular for continuous D.C. ingot or strip casting with moving molds and caterpillar track type mold belts.

Mould with roughened surface for casting metals

The present invention teaches a multi-stepped process for preparing high strength, improved formability, low earing strip stock which is especially suitable for the manufacture of deep drawn and ironed hollow bodies such as cans or the like. The process of the present invention is carried out in two distinct operations. The first operation comprises continuously casting an aluminum melt into strip form on a strip casting machine so as to produce a desired dendritic arm spacing, hot rolling the continuously cast strip at casting speed in a temperature range between 300.degree. C. and the non-equilibrium solidus temperature of the alloy with the total reduction in excess of 70% and finally coiling the hot strip and allowing it to cool in air to room temperature so as to produce a metal strip having properties favorable for subsequent cold rolling operations. The second operation comprises an improved cold rolling operation in which a brief heat treatment at 350.degree. C. to 500.degree. C. for not more than 90 seconds is introduced between a first and second cold rolling operation.

Process for preparing low earing aluminum alloy strip on strip casting

A process is described for the delivery of molten metal to a caterpillar type mold which is inclined slightly to the horizontal and is used for casting wide strip, especially non-ferromagnetic metals, such as aluminium of aluminium alloys. The metal is fed through a delivery nozzle made of fire resistant material to a head of liquid metal in the mold either under the free surface of this head of metal or through this free surface on the head of liquid metal. Premature contact with the mold wall is avoided and the molten metal is fed in an almost pressureless manner.

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Sierre, Switzerland

Martin Bolliger