Multi-directional 3D Printing with Strength Retention

In this poster, we proposed a refined scheme and system to realize the multi-directional 3D printing with the strength as the traditional unidirectional 3D printing. With the introduction of the 10.6m CO2 laser, the printing system can heat the interfaces of the already printed components and increase the intermolecular-penetrating diffusion while fabricating the base layers of the next components. Therefore, the interfacial bonding strength between components is augmented. The tensile tests demonstrate that the interfacial bonding strength can be increased by more than 27%, which reaches the strength of the integrated ones. The improved printing system makes it possible to realize multi-directional 3D printing with strength retention.