2020
DOI: 10.3390/polym12123009 View full text |Buy / Rent full text
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Abstract: We present a heuristic procedure for determining key processing parameters (PPs) in materials-extrusion-based additive manufacturing processes. The concept relies on a design-of-experiment approach and consists of eleven “test objects” to determine the optimal combinations of key PPs values, starting with the PPs for printing the first layer and progressing to more complex geometric features, e.g., “bridges”. In each of the test objects, several combinations of the known PPs’ values are used, and only the valu… Show more

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“…Many researchers have explored a large amount of data on PLA, based on FDM, and if the parameters of PLA and PETG could be cross-referenced, the printing parameters of PETG could be evaluated by the data history of PLA in the future. Bakradze et al [ 24 ] present a heuristic procedure for determining the key processing parameters (PPs) of PA and ABS; the results showed that it is possible to reduce the optimization time down to several hours, as well as to reduce the amount of consumed feedstock material. Tensile tests revealed a strong effect of the amorphous and semi-crystalline nature of the polymer on the results of optimization.…”
Section: Literature Reviewmentioning
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“…Many researchers have explored a large amount of data on PLA, based on FDM, and if the parameters of PLA and PETG could be cross-referenced, the printing parameters of PETG could be evaluated by the data history of PLA in the future. Bakradze et al [ 24 ] present a heuristic procedure for determining the key processing parameters (PPs) of PA and ABS; the results showed that it is possible to reduce the optimization time down to several hours, as well as to reduce the amount of consumed feedstock material. Tensile tests revealed a strong effect of the amorphous and semi-crystalline nature of the polymer on the results of optimization.…”
Section: Literature Reviewmentioning
“…The fixed parameter conditions included an infill density of 20%, a raster angle of 45 • , a layer thickness of 0.2 mm, and a platform temperature of 25 • C. The X, Y, Z labels used for the specimen orientation are shown in Figure 1. The quality of a 3D-printed object depends on the quality of the initial 3D model of the object; therefore, the image acquisition step is essential to the quality of the 3D-printed object [24][25][26]. The three different requirements of printing quality are: (i) low surface roughness, (ii) good mechanical properties, and (iii) short printing time.…”
Section: Printing Procedures and Parametersmentioning
“…In this paper, one of Bakradze et al's [30] optimization strategies were used. The lowsurface-roughness optimization strategy was utilized to provide higher geometrical precision and good mechanical properties.…”
Section: D Printingmentioning
“…This is because the 3D printing process with flexible material is more demanding and cannot be realized with most 3D printers available on the market. Besides, the determination of suitable technological parameters for flexible polymers requires additional, time-consuming optimization studies [ 17 , 18 , 19 ].…”
Section: Introductionmentioning