A novel approach on artificial aging of nylon 12 powder for laser powder bed fusion
Abstract
Purpose - This study aims to address challenges in the Laser Powder Bed Fusion process of polymers, focusing on the considerable amount of unsintered powder left post-printing. The objective is to understand the altered properties of this powder and find solutions to improve the process, reduce waste, and explore reusing reprocessed powder.
Design/methodology/approach - A novel methodology is employed to generate reprocessed powder without traditional printing, reducing time, cost, and waste. The approach mimics the aging effects during the printing process, providing insights into particle size distribution and thermal behavior.
Findings - Results reveal insights into artificial aging, showing an 8.2% decrease in particle size (60.256 - 69.183 μm) and a 9.1% increase in particle size (17.378 - 19.953 μm) compared to unsintered powder. Thermal behavior closely mirrors used powders, with variations in enthalpy of fusion (-0.55% to 2.69%) and degree of crystallinity (0.19% to 2.64%). The proposed methodology produces results that differ from those due to printing under 3% from a thermal point of view. The
new process reduces the time needed for aged powder, contributing to cost savings and waste reduction.
Originality/value - The study introduces a novel method for reprocessed powder generation, deviating from traditional printing. The originality lies in artificially aging powders, providing comparable results to actual printing. This approach offers efficiency, time savings, and waste reduction in the Laser Powder Bed Fusion process, presenting a valuable avenue for further research.
Mehr zum Titel
| Titel | A novel approach on artificial aging of nylon 12 powder for laser powder bed fusion |
|---|---|
| Medien | Rapid Prototyping Journal |
| Verlag | Emerald Publishing Limited |
| Heft | ahead-of-print |
| Band | ahead-of-print |
| ISBN | 1355-2546 |
| Verfasser/Herausgeber | Valentina Vendittoli, Wilma Polini, Prof. Dr.-Ing. Michael S. J. Walter, Jakob Paco Cornelius Stacheder |
| Seiten | --- |
| Veröffentlichungsdatum | 09.08.2024 |
| Projekttitel | --- |
| Zitation | Vendittoli, Valentina; Polini, Wilma; Walter, Michael S. J.; Stacheder, Jakob Paco Cornelius (2024): A novel approach on artificial aging of nylon 12 powder for laser powder bed fusion. Rapid Prototyping Journal ahead-of-print (ahead-of-print). DOI: 10.1108/RPJ-12-2023-0430 |