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. 2018 Jul 31;11(8):1322.
doi: 10.3390/ma11081322.

Influence of PLA Filament Conditions on Characteristics of FDM Parts

Ana Pilar Valerga  1 , Moisés Batista  2 , Jorge Salguero  3 , Frank Girot  4   5
Affiliations

Influence of PLA Filament Conditions on Characteristics of FDM Parts

Ana Pilar Valerga et al. Materials (Basel). .

Abstract

Additive manufacturing technologies play an important role in Industry 4.0. One of the most prevalent processes is fused deposition modelling (FDM) due to its versatility and low cost. However, there is still a lack of standardization of materials and procedures within this technology. This work aims to study the relationship of certain operating parameters and the conditions of poly(lactic acid) (PLA) polymer with the results of the manufactured parts in dimensional terms, surface quality, and mechanical strength. In this way, the impact of some material characteristics is analyzed, such as the pigmentation of the material and the environmental humidity where it has been stored. The manufacturing parameter that relates to these properties has been the extrusion temperature since it is the most influential in this technology. The results are quite affected especially by humidity, being a parameter little studied in the literature.

Keywords: FDM; PLA; additive manufacturing; extrusion temperature; humidity; material color; pigmentation.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Flow chart of the experimental Procedure.
Figure 2
Figure 2
(a) Dimensions and trajectories used for monolayer samples [6]; (b) monolayer cross-sectional mesostructure.
Figure 3
Figure 3
Wire cross-section dimensions of fused deposition modelling (FDM) filament extruded and deposited at different temperatures.
Figure 4
Figure 4
Dimensional deviations in relation to the used temperatures and pigments.
Figure 5
Figure 5
Evolution of roughness average (Ra) as a function of temperature and different pigments.
Figure 6
Figure 6
Plot of tensile strength (Tmax) trends as function of variable temperature (T) and relative humidity (H).
See this image and copyright information in PMC

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