ANALISIS PENGARUH NOZZLE TEMPERATURE DAN PRINT SPEED TERHADAP SIFAT MEKANIK PADA HASIL CETAK 3D PRINTING BERFILAMEN TPU 95A DENGAN LAYER HEIGHT 0,2 MM

This study analyzes the effect of nozzle temperature and print speed variations on the mechanical properties of 3D-printed specimens using TPU 95A filament. The tested parameters include nozzle temperatures of 220°C and 230°C, and print speeds of 70 mm/s, 80 mm/s, and 90 mm/s. Constant parameters were set at a 0.2 mm layer height, 100% infill, 60°C bed temperature, and concentric infill pattern. Mechanical tests were conducted to evaluate hardness, tensile strength, elongation at break, and density, following ASTM D2240-15, ASTM D792-20, and JIS K6251:2017 standards. The highest hardness (74.8 Shore A) and maximum tensile strength (28.21 MPa) were achieved at 220°C and 70 mm/s, while the highest elongation at break (137.0%) occurred at 230°C and 90 mm/s. Two-way ANOVA results indicated that nozzle temperature, print speed, and their interaction significantly affected hardness (p-value = 0.000). Print speed contributed the most to hardness variation (91.82%), followed by nozzle temperature (6.89%) and their interaction (1.15%). This research provides valuable insights into optimizing 3D printing parameters to improve the quality of TPU 95A-based printed products.
Keywords: 3D Printing, TPU 95A, Nozzle Temperature, Print Speed, mechanical properties,