voestalpine has been engaged in pioneering 3D printing with metals for many years. These metals are already being used at its own 3D printing and research centers around the world. Now the steel and technology Group has started operating Europe’s most advanced 3D sand printer for heavy steel castings at its site in Traisen, Lower Austria. The new additive manufacturing technology for the production of sophisticated castings using silica sand reduces production times and is more environmentally friendly than the previous process.
Additive manufacturing has long since become an established production method, particularly in the aerospace, automotive, and toolmaking industries, as well as in the field of medical technologies.
MORE EFFICIENT AND SUSTAINABLE MANUFACTURE OF COMPLEX COMPONENTS
During the process, a 3D printer uses CAD data to directly produce sand molds into which liquid steel is poured. The sand molds are created by the repeated application of 300-micrometer-thick layers of chemically bonded silica sand. Large sand molds can also be printed in several separate sections and then combined.
As a result, complicated wooden models are no longer required, so that molds can be manufactured more quickly and with more near net-shaped contours, particularly for complex castings. This significantly shortens or even eliminates final in-house processing, as well as steps such as welding and forging undertaken on the customer’s premises.
The innovative manufacturing process is primarily used to produce castings for the energy industry, and for the automotive and railway sector. One recent order, for example, was for rotor discs for water turbines. By removing the need for wooden models, integrated sand recycling, and simplified logistics, 3D sand printing is also more sustainable and environmentally friendly than the process it replaces.