MONITORING PEI PRODUCTION PARAMETERS ON A CUSTOM-MADE 3D PRINTER: AN INSIGHT INTO PHYSICAL AND MECHANICAL PROPERTIES

This study investigates the impact of production parameters on the quality of 3D-printed polyetherimide (PEI) samples using a custom-made 3D printer. In contrast to traditional optimization approaches, this research emphasizes the variability of outcomes despite maintaining fixed parameters such as nozzle and bed temperatures and slicer options. The study involves real-time monitoring of factors including nozzle, bed, and chamber temperatures, as well as relative humidity during the production process. Each layer was photographed individually to analyze its impact on the final product. Detailed physical and mechanical analyses revealed significant deviations in dimensions and flexural modulus, with a 10% loss in density and nearly 25% loss in flexural modulus in lower-performing samples compared to the best results. Results show correlations between critical parameters and product quality, underscoring the necessity for proper preparation and precise control. Furthermore, the research proposes a new method to geometrically represent the manufacturing process in a time-independent way using collected sensor data in 3D printing. This approach provides valuable insights for future studies aimed at optimizing additive manufacturing processes and enhancing the application of high-performance thermoplastics in high-tech fields such as aerospace and defense industries.