Impact of Printing Parameters on Green Density Homogeneity in Lithography-based Metal Manufacturing

The need for additive manufactured parts with high dimensional accuracy and high surface quality leads to innovation in sinter-based AM. A promising approach is the emerging lithography-based metal manufacturing (LMM) which combines powder metallurgy and stereolithography. As this is a novel technology, this study aims to investigate the printing parameters: degree of powder filling of the feedstock, layer thickness, coating speed, coating mode and size of the material roll, with the help of a DoE. After the previously published investigation of green part characteristics, the samples are debound and sintered. These parts are analysed with focus on geometrical accuracy and densification. The DoE enables analysis of correlations between printing parameters and densification behaviour. Therefore, it improves the understanding of the technology and enables further optimization.