Influence of PA12 Filament Conditions and Printing Parameters on Mechanical Properties of FDM 3D Printing Parts
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Abstract
This research investigates the moisture conditions in nylon filaments and the influence of printing parameters on the mechanical properties of 3D-printed parts. The findings provide guidance for users in selecting and preparing nylon filaments before 3D printing. The study revealed that printing with low-moisture nylon filaments resulted in higher tensile strength. Specifically, nylon filament with 0% moisture content exhibited the highest tensile strength at 54.05 MPa, while filaments with moisture levels of 1.63% and 3.17% showed progressively lower tensile strengths. Adjusting the melting temperature and printing speed can enhance tensile strength. For nylon with 0% moisture, setting the melting point to 260°C and the printing speed to 30 mm/s resulted the best tensile strength. Similarly, nylon with 1.63% moisture required the same settings, while nylon with 3.17% moisture performed better at a melting temperature of 300°C and a speed of 45 mm/s. Additionally, moisture content significantly affected impact resistance, with higher moisture levels leading to reduced impact strength. Nylon with 0% moisture demonstrated the highest impact resistance at 17.18 kJ, which decreased with increasing moisture content. Adjusting the melting temperature and printing speed can slightly improve impact resistance, particularly for high-moisture filaments. Reducing the melting point to 260°C and increasing the printing speed to 60 mm/s was recommended for such cases. The findings of this study offer practical guidelines for optimizing 3D printing parameters when using nylon filaments with varying moisture levels, ensuring desirable mechanical properties in 3D-printed parts.
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