| Abstract Scope |
HP’s Multi Jet Fusion (MJF) is a powder-based technology that selectively melts polymer powder, using a fusing agent, in a layer-by-layer fashion to create 3D parts. There are several different voxel properties that can be modulated using MJF including multi-color, ductility, conductivity, among others. Creating mechanically uniform multi-material parts with varying voxel properties throughout is challenging due to the liquid agents used to achieve these different material properties having competing cooling and active absorbing components that effect the temperature of printed parts differently. Here, we balance fusing ability by utilizing a thermal imaging camera and an agent loading sweep thermal profile characterization print for each individual agent. Then we digitally control the ink loading based on this data set and dynamic FLIR imaging to flatten the temperature profile. This ensures uniform fusing throughout multi-agent printed parts, shown by uniform density measurements of multi-color parts. |