ValCUN presents Molten Metal Deposition (MMD) technology for aluminum AM

Belgium-based ValCUN has introduced Molten Metal Deposition (MMD), a wire-fed metal extrusion process specifically designed for aluminum additive manufacturing. The technology uses an electrically heated crucible to melt standard aluminum wire feedstock at approximately 700°C, extruding it through a nozzle onto a heated substrate in a single-step, layer-by-layer process. MMD requires no debinding, sintering, or post-process heat treatments like HIP, and parts are described as dimensionally stable and structurally coherent immediately upon removal from the substrate. The Minerva Printer, which commercializes MMD, supports support-free printing with 75° overhangs and bridges over 25 mm, and is compatible with off-the-shelf industrial alloys such as Al 4008, Al 4043, and Al 5082.

MMD addresses a persistent gap in metal AM: the difficulty of processing high-reflectivity, high-thermal-conductivity aluminum alloys without resorting to expensive powder-based systems or specialized, hard-to-validate alloys. Unlike LPBF or binder jetting, MMD eliminates risks of oxidation, contamination, and explosion associated with metal powders, and operates in ambient air or local inert atmosphere without vacuum chambers or inert gas purging. This positions ValCUN in the wire-based DED and extrusion segment, competing with technologies like WAAM and Meltio's wire-laser DED, but with a simpler thermal model that avoids melt-pool dynamics. The use of standardized wire feedstock and the elimination of auxiliary powder management or sintering hardware lower the barrier to entry for manufacturers in aerospace, automotive, and construction, where aluminum is ubiquitous but AM adoption has been limited by material constraints and process complexity.

ValCUN's MMD is a pragmatic step toward making aluminum AM accessible for production environments that prioritize safety, simplicity, and material standardization over extreme resolution or speed. The company must now demonstrate repeatable part quality across multiple alloys and build cycles, and build a customer reference base that validates the technology's reliability for end-use applications. For potential buyers, the key question is whether MMD's trade-offs — lower geometric complexity compared to LPBF, but faster workflow and lower infrastructure cost — align with their specific production needs, particularly for large, support-free aluminum parts where post-processing is minimal.