Page 68 - MSAM-1-1

Materials Science in Additive Manufacturing Thixotropic metal 3D printing

Figure 11. Illustration of line width under different extrusion speed. Both unstable and stable lines are presented in different zones. Two different nozzle
diameters are compared: 1.5 mm and 1.0 mm.

Figure 12. Line width distribution at variable nozzle-to-substrate distance from 1 mm to 30 mm.

Table 3. Setup of printing parameters for studying the effects dragged out of the droplet, lowering the printing resolution.
of extrusion speed. It was found that a setup distance between 12 and 22 mm
produces the best printing results. Line widths for 1.5 mm
Printing parameters Values and 1.0 mm nozzles varied slightly as distance increased. The
PID set value (°C) 83°C 1.5 mm nozzle was capable of printing lines up to a distance
Nozzle diameter (mm) 1.5 mm and 1 mm
of 28 mm on the substrate. The 1 mm nozzle, on the other
X-Y platform moving speed (mm/s) 4 mm/s hand, can reach a closer distance, but the material does not
Distance between nozzle tip and substrate (mm) 15 mm adhere to the substrate at the 21 mm distance trail.

4.2.4. Effects of X-Y platform moving speed
around the nozzle outlet will form a large droplet, which
will eventually obstruct the nozzle tip. When the nozzle While the electric linear actuator can produce accurate
tip moves out of the blocked area, additional material is control of the extrusion speed and can improve printing

Volume 1 Issue 1 (2022) 9 http://doi.org/10.18063/msam.v1i1.5