Research Of Three-Dimensional Printing For Energetic Materials

According to the theory of rapid prototyping technique, the hardware of Three-dimensional Printing (3DP) was made up of the MC400 motion platform, Ultra2400 dispensing system and UVEC-4 UV light source. The controlling program and CAD model processing were designed and compiled by Visual Basic. The technology of graph printing with UV curable resin and the ink that mixed with energetic materials were investigated. The automation technology of loading propellant into the microporous was explored. Both of the researches lay the foundation for Direct-Write and MEMS microporous automation charge technology.The main researches and conclusions are as follows:(1) The initial 3DP system establishment was completed and the controlling program CAD model processing was compiled.(2) The Flowing model of resin in nozzle was set up by FLUENT based on the continuity equation, and the average velocities of 27G and 32G from numerical simulation were 20.6mm/s and 16.4mm/s.(3) The printing accuracy along the print line was properly controlled and the lateral sizes were 0.95mm,0.55mm and 0.30mm respectively. The 27G and 32G needles could meet the general need for accuracy. The graph printing was processed and the printed pattern properly reflected the designed feature input to the computer.(4) The energetic material ink had been applied in three-dimensional printing for 22G needle and each layer was about 0.3mm. During printing the forth layer, the pattern was warped by curing shrinkage stress. The three-dimensional pattern was well established by the four layers.(5) For MEMS microporous, light-cured resin and nitrocellulose are as binder in the energetic ink which meet the requirement of the 3DP rapid prototyping system and the loading experiments providing valuable experience for the following formulations of the energetic material ink.