A Technical-Economic Study on Optimizing FDM Parameters to Manufacture Pieces Using Recycled PETG and ASA Materials...

This paper presents the results of research on the technical-economic optimization of FDM parameters (L_h-layer height and I_d-infill density percentage) for the manufacture of tensile and compression samples from recycled materials (r) of PETG (polyethylene terephthalate glycol) and ASA (acrylonitrile styrene acrylate) in the context of the transition to a circular economy. To carry out our technical-economic study, the fundamental principle of value analysis was used, which consists of maximizing the ratio between V and C, where V represents the mechanical characteristic (tensile strength or compressive strength) and C represents the production cost. The results of this study showed that, in the case of tensile samples manufactured by recycled PETG (rPETG), the parameter that significantly influences the results of the V ratios is L_h (the height of the layer), while for the samples manufactured additively from recycled ASA (rASA), the parameter that decisively influences the tensile strength is I_d (the infill density percentage). In the case of compression samples manufactured by FDM from recycled PETG (rPETG) and recycled ASA (rASA), the parameter that signified influences the results of the V ratios is I_d (the infill density percentage). Following the optimization of the FDM parameters, using multiple-response optimization, we identified the optimal parameters for the manufacture of parts by FDM from rPETG and rASA: L_h = 0.20 mm and I_d = 100%. The results of this study demonstrated that the use of recycled plastics from PETG and ASA lends itself to a production and consumption model based on a circular economy.