Vochozka Vladimír, Černý Pavel, Šramhauser Karel, Špalek František, Kříž Pavel, Čech Jiří, Zoubek Tomáš, Bartoš Petr, Kresan Jan, Stehlík Radim
Department of Applied Physics and Technology, Faculty of Education, University of South Bohemia in Ceske Budejovice, Jeronymova 10, 371 15 Ceske Budejovice, Czech Republic.
Department of Technology and Cybernetics, Faculty of Agriculture and Technology, University of South Bohemia in Ceske Budejovice, Studentska 1668, 370 05 Ceske Budejovice, Czech Republic.
Polymers (Basel). 2024 Oct 10;16(20):2862. doi: 10.3390/polym16202862.
The effect of 3D printing parameters by Fused Filament Fabrication (FFF) on the translucency of polylactic acid (PLA) parts was investigated. Six different printing parameters were studied: object orientation, layer height, nozzle temperature, fan speed, extrusion multiplier, and printing speed. The commercially available Plasty Mladeč PLA filament and the Original Prusa MK4 3D printer were used for the experiments. The translucency of the printed samples of 50 × 25 × 1 mm dimensions was measured using a luxmeter in an integrating sphere. A total of 32 sample combinations were created. Each sample was printed ten times. The results show that all investigated parameters significantly affect the optical properties of PLA parts. The best measured translucency values were obtained when printing in portrait mode, with a layer height of 0.30 mm, nozzle temperature of 240 °C, fan speed of 100%, 0.75 set extrusion multiplier, and a speed of 40 mm/s. ANOVA was used to statistically evaluate the effect of each parameter on translucency, and statistically significant differences were found between different combinations of parameters ( < 0.05). Scanning Electron Microscope (SEM) analysis provided detailed images of the surface structure of the printed samples, allowing for a better discussion of the microscopic properties affecting the translucency. The best print setting has an efficiency of 88% compared to the default setting of 65%. The ability of visible light to pass through the print (translucency) improved by 23%.
研究了熔融长丝制造（FFF）的3D打印参数对聚乳酸（PLA）部件透明度的影响。研究了六个不同的打印参数：物体方向、层高、喷嘴温度、风扇速度、挤出倍数和打印速度。实验使用了市售的Plasty Mladeč PLA长丝和Original Prusa MK4 3D打印机。使用积分球中的光度计测量尺寸为50×25×1mm的打印样品的透明度。总共创建了32个样品组合。每个样品打印十次。结果表明，所有研究参数均显著影响PLA部件的光学性能。在纵向模式下打印时，获得了最佳测量透明度值，层高为0.30mm，喷嘴温度为240°C，风扇速度为100%，挤出倍数设置为0.75，速度为40mm/s。使用方差分析（ANOVA）对每个参数对透明度的影响进行统计评估，发现不同参数组合之间存在统计学显著差异（<0.05）。扫描电子显微镜（SEM）分析提供了打印样品表面结构的详细图像，有助于更好地讨论影响透明度的微观特性。与默认设置的65%相比，最佳打印设置的效率为88%。可见光透过打印件的能力（透明度）提高了23%。
