Shape quickly technology and sand mold cast union to form fast sand mold to cast a technology. Replace wooden moulding to make sand mold with SLA colophony about or model core, make can burn break prototype to have fact model, the about that make replaces wooden model 1) patternmaking is three-dimensional build model, scale to shrink put, STL format saves, shape quickly: 4) cast nextpage2, be based on SLA disappear the law is cast be based on SL A prototype to disappear foundry technology of law sand mold is the foundry technology method that there is perspective most in be based on foundry technology of SL A archetypal sand mold, theoretic the cast that can get used to any complex structures. Cheng Jian of its pull current issues plan institute to show. Be based on SLA prototype to disappear law sand mold casts manufacturing flow chart 1) prototype is made 2) sand mold is made 3) pouring 4) cast CNC Milling