Impact of Recoater Method in Stereolithography: A Comparative Analysis of Print Quality and Material Properties

This study explored a novel vacuum recoating method designed to enhance the manufacturing yield of stereolithography printing by addressing the limitations associated with the conventional blade recoating method. While the blade recoating method is cost-effective and straightforward, it often results in the formation of bubbles within the resin during the recoating process, leading to mechanical defects. These defects pose significant challenges for mass production wherein consistency and yield are crucial. The vacuum recoating method leverages vacuum technology to maintain a bubble-free environment during recoating, thereby significantly enhancing the manufacturing yield and quality of the printed parts. This study compared the vacuum recoating method with the conventional blade recoating method in a vacuum environment, using polymer testing techniques, such as computed tomography (CT) scanning, surface roughness testing, and tensile testing to evaluate the advantages of the vacuum method in terms of manufacturing yield, dimensional accuracy, and internal quality. The findings of this study demonstrate that the vacuum recoating system not only reduces the formation of defects but also enhances production efficiency, making it a valuable innovation for industries that require high precision and reliability in their 3D printed products.