Technical development of multi-resin three-dimensional printer using bottom-up method

Abstract

The use of multi-resins entails certain challenges due to inter-stain in the intermediate layer of cured resins and misalignment caused by the use of multi-light sources or vat switching. This study proposes a new mechanism for a multi-resin three-dimensional printer that can fabricate physical models consisting of different resins without misalignment using the bottom-up method with a digital projector and a clean modulus that can avoid inter-staining. Experimental results show that the proposed C-arm design offers self-alignment when the platform is switched or during cleaning. The proposed clean modulus can also prevent inter-staining, thus producing a clear boundary layer. The linear and angular dimensions are respectively accurate within 20 μm and 0.2°.