A robust ink deposition system for binder jetting and material jetting

Abstract The adaptation of inkjet technology for additive manufacturing (AM) enabled the highest standards of print speed and print resolution in the industry. However, inkjet printheads impose strict limitations on ink properties. Ink compositions ex volatility, rehydration, surface tension, chemical stability, abrasiveness, and electrical properties that deviate from printhead specifications shorten its service life. Frequent and complex maintenance procedures are necessary, but replacement is the only solution to declining print quality, accruing heavy maintenance costs. This is especially limiting for AM as part quality and properties are closely dependent on ink composition. We propose an ink deposition system designed for robustness by implementing modular and dedicated components. The system deposits ink in a continuous jet. We find optimal process parameters and evaluate system performance in comparison to inkjet and material extrusion (ME). The system produces line widths between 0.3 - 0.5 m m , indicating print resolution capabilities are comparable to commercial ME systems.