Metal Additive Manufacturing
With the development of laser-based powder bed fusion, the first technology for metal Additive Manufacturing was established. Today we know more than 18 different metal 3D printing processes, adding new ones almost every day. Many of these processes have their origins in long-established technologies such as build-up welding and metal injection molding. Others are completely new technologies.
The most widespread among the technologies for metal Additive Manufacturing is the Laser-based powder bed fusion. This is reflected in the number of different system providers. Great expectations in terms of reduction of costs and production time are currently aroused by the binder-based systems. While the sintering process largely corresponds to the long-known sintering process, the system providers of this new metal 3D printing technology are mainly distinguished by their part-shaping technology. Also, the base material is different. While granulate and wire materials contain binder and metal powder together, binder jet systems use separate components.
Binder systems aim at the high design freedom of the established technologies for metal Additive Manufacturing. In the case of wire-based processes, on the other hand, high resolution is not the focus. These process create a “near-net shape” blank whose surfaces are machined where smoothness or high resolution features are required. In the case of powder bed and binder systems, on the other hand, only the functional surfaces are reworked since usually the as build surface is already sufficient. However, the build-up welding processes offer significantly higher build-up rates.
In our Technology Map for Metal Additive Manufacturing, we subdivide the procedures based on the ASTM / ISO 52900. However, methods are now known that elude a known classification. Systems from vendors such as Vader and Fabrisonic use completely new approaches to energy input and raw materials. However, these technologies still have a relatively young degree of maturity. In addition, it should be noted that even with the same classification, the procedures may still differ. For example, the technology of 3DEO can only be classified as binder jetting as it incorporates a milling process at the same time.