Abstract: Limited by the layered printing principle of traditional stereolithography process, the printing speed and printing quality of liquid resin stereolithography 3D printing have been unable to get a breakthrough. Continuous liquid interface production 3D printing technology (CLIP) avoids the existence of physical layer of the printing parts to some extent, which can alleviate the trade-off between printing speed and printing quality in the traditional stereolithography 3D printing process,thus providing the possibility for resin additive manufacturing of high speed, high precision and high quality.In this paper, the 3D printing process and the influence of printing speed on the quality of the printing parts of CLIP in high-speed printing mode (300-1 500 mm/h) are studied in detail. The results show that under the influence of resin viscosity, the layerless printing gradually changes to the layered printing with the increase of printing speed in the high-speed printing mode, and the performance of the printing part is also affected. Ordinary resin can not only obtain the best surface quality (Sa=1.98 μm), but also obtain the best tensile strength(45.6 MPa) at a relatively low print speed, and the results are better than DLP printing.

Key words: photopolymerization, high-speed continuous 3D printing, resin, viscosity, properties of printed parts