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The 3D printing process has succeeded in the last few years, thanks to the development of fibre resources and a greater focus precision of the laser beam. But this is a complex process in repeatability that still needs more studies and improvement to overcome the lack of standards.
Nippon Gases has developed a chamber, the 3D Cabinet, to drastically reduce having products with defects due to oxygen and moisture presence. By eliminating these two parameters, the process can be stable and standard.
Thanks to this cabinet, the metal powder will be protected. The cabinet design guarantees inerting through a constant flow of inert gas, which is deactivated when the cabinet is open to withdraw metal dust and is reactivated when its door is closed. The cabinet has also heated support surfaces, bringing out moisture in the dust and eliminating it through the controlled inert gas flow.
Thanks to these studies, it was also possible to understand that the presence of both pollutants inside the chamber is directly proportional to the number of defects in the product.
Our R&D centres carried out some studies showing how these two pollutants cause imperfections in the metallurgical structure of products manufactured with the 3D printing process. Thanks to these studies, it was also possible to understand that the presence of both pollutants inside the chamber is directly proportional to the number of defects in the product.
3D Pro Cabinet is a concrete solution to preserve metal powder from atmospheric contamination before the process, at the same time, it provides the necessary guarantees to obtain an effective result throughout the process.
Metal AM process
The influence of gases in the
metal additive manufacturing
3D printing processes can be of different types: PBF, EBM, DED, FDM, and the most recent one WAAM. There are also many different metals, often noble ones, that can also be processed, reason why this is an expensive process. All these different processes have a common characteristic, which is to protect the manufactured product from oxidisation during construction and heat treatment phases.
So, to preserve the metallurgical characteristics of the metal powder essential to obtain the finished product, it is important to use high-quality gas.