Methods and systems for post-processing molds are provided. In some embodiments, a method includes using a layer-by-layer build process on a polymeric resin to produce a plurality of aligner molds. The method can include transporting the plurality of aligner molds to a resin removal station. The method can also include applying high pressure air to the plurality of aligner molds to remove residual material from the plurality of aligner molds. The residual material can include excess polymeric resin. The method can further include collecting the excess polymeric resin.