Impact of inkjet printing parameters and environmental conditions on formation of 2D and 3D binder jetting geometries

While Binder Jet Additive Manufacturing (BJAM) has great potential, its implementation is limited by defects in the finished parts. An improved understanding of how printing parameters impact quality printed parts needed. Prior work on droplet/powder interactions BJAM focused individual lines, this shows that successful layer formation favors larger droplet spacing than viable lines. When layers, first was significantly rougher spread bed indicating significant powder ejection. However, difference eliminated after 1–4 additional layers. These results show prior layers have a strong and imbibition simple or line geometries are not effective for testing parameters. The roughness may contribute to large pores observed between This paper further examines key including thickness, droplet/line spacing, inter-arrival time saturation surface 2D 3D (print frequency) had negligible under conditions tested. Printed behaved similarly at values comparable diameter (44 μm). In contrast, 60 μm, produced substantially lower saturation. Effective generally increases with increased number Ambient humidity exposure during shown outcomes though higher moisture levels from steam dramatically alter Drying before spreading reduced variation All tests were based gas atomized −22 μm 316 SS powder.