Abstract:
3D-printing a manufacturing process known as ”additive manufacturing” because it adds
material in sequential patterns to generate the desired form rather than removing material
to build a part. The process parameters in three-dimensional (3D) fused deposition modeling
(FDM) printing have a significant impact on the printed product; therefore, the parameters
must be carefully selected to improve the properties of the final product. In view of this, the
present paper experimentally and statistically studied the effect of various printing parame ters, namely layer thickness, build orientation, and raster orientation, on printing accuracy,
printing time, tensile strength and flexural strength using Polylactic acid (PLA) filament.
Based on Taguchi’s mixed model fractional factorial design, 27 experiments were set and
the specimens of Polylactic acid are printed on an fused deposition modeling 3D printer and
tested for tensile and 3-point bending (flexural strength) using the shimazu AGS-X universal
testing machine. Thereafter, the optimal combination of the parameters was selected using
Signal-to-Noise ratio (S/N), and Analysis of Variance (ANOVA) is used for indicating the
significant parameters and their effect on tensile and flexural strength. And also High-speed
infrared imaging was performed using the Telops FAST-IR 2K. The results showed that print ing time decreases as layer thickness decrease and also upright building orientation showed
maximum building time. The tensile and flexural strengths of the part were affected by the
selected process parameters, including the build orientation, which showed a maximum result
at the one-edge build orientation for tensile strength, while the flat build orientation for flex ural strength, the layer thickness of 0.08 mm and 0.16 mm showed a maximum for tensile
and flexural strength, respectively, and the raster angle of 0◦/90◦
showed a maximum result.
Finally, the building orientations were statistically significant and had a large effect on the
results, with the building orientation having the greatest effect on tensile strength (88.837%)
and flexural strength (77.347%).
