Design and realization of multicolor photosensitive resin 3D printer
WANG Chun mei, YANG Wen long
(1.Department of Internet Finance & Information Engineering, Guangdong University of Finance, Guangzhou 
510521, China;2.Guangzhou Guoguang Instrument Co., Ltd., Guangzhou 510800, China)

Abstract: Aiming at the problems of current the three dimensional rapid prototyping technology bases on liquid photosensitive resin to realize mult color printing and raw material recovery, the forming method and curing mechanism of the photosensitive resin were analyzed, the stereo lithography appearance technology and digital light procession technology were deeply researched. A multi color photosensitive resin 3D printer bases on DLP technology was proposed, the working principle and circuit design of high resolution DLP projector were discussed in detail, the overall solution for four color photosensitive resin 3D printing was given, and the automatic recovery of printed materials was designed. The results indicate that the photosensitive resin 3D printing of using DLP technology prints faster than SLA technology, also meet the requirements of high resolution 3D printing; multi color photosensitive resin 3D printer bases on DLP technology can achieve multilayer colors printing and function of automatic recycling raw materials, to meet the requirements of rapid prototyping manufacturing technology, to realize intelligent and automatic 3D printing, the expected target is achieved.

Key words: 3D printing; photosensitive resin; stereo lithography appearance(SLA); digital light procession(DLP); multicolor printing