Portholes - Import export

In the aluminium industry, the porthole extrusion process is the standard method for the production of extruded tubes and profiles. The process is limited to a number of aluminium alloys. However, most of the commercially available medium strength aluminium alloys such as EN AW-6060 or EN AW-6082 can be extruded by porthole extrusion.

Aluminiumwerk Unna AG is specialised in the production of Aluminium tubes. The Aluminium tubes are extruded on site using two possible methods. These are either Seamless extrusion or Porthole extrusion. It is quite simple to distinguish between the two extrusion methods. In seamless extrusion, a mandrel is positioned and fixed inside the extrusion die, creating the inner contour of the tube. In porthole extrusion, the mandrel is fixed and is supported by a number of integral bridges affixed to the outer portion of the extrusion die.

Aluminiumwerk Unna AG one of the world’s leading manufacturers of aluminium alloy tube. We produce a variety of specialist aluminium alloy products. Our core focus is the production of aluminium alloy tube and tubular profiles. These can be offered as seamless extruded or porthole extruded products. The extruded products can also be cold drawn making it possible to offer a comprehensive range of final dimensions.

Welbee P320E Continuously variable welding inverter for MIG / MAG pulse arc welding and rated output current range from 30 up to 320 A. Excellent welding characteristics for mild steel, stainless steel andaluminum.

Welbee P400: Pulse welding for all arc jobs Realization of a high quality pulse welding by utlizing an optimized waveform control according to various kinds of materials. The arc stability is perfect even in a high-speed welding.

With the properties of the new DT300P digital power source, TIG welding can be significantly simplified: There are numerous options in a compact 30 kg unit. With a multitude of pulse options, the device can be ideally set for different tasks: A controlled heat supply ensures optically clean and even seam structures during low-pulse welding (up to 20Hz) - especially with different material thicknesses. The high arc stability in high-pulse welding (from 20 to 500 Hz), on the other hand, is demonstrated in the lower current range, especially in thin sheet metal applications: welding can be carried out without any problems from a material thickness of 0.3 mm. The robust 80 kHz IGBT inverter stands for reliability and extreme arc stability - even with low currents. The digital control panel, which is designed for rough industrial use, offers many advantages for the user.

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