Powder removal apparatuses for additive manufacturing apparatuses

A powder removal system comprising:

• a build module configured to use as part of an additive manufacturing apparatus;
• and
• a powder removal apparatus configured to rest upon the build module and for use in removing powder from a three-dimensional printed object in the build module, the powder removal apparatus comprising:
• an extraction housing comprising a sidewall that is sized and configured to extend around a powder bed of the build module and a top wall that is sized and configured to extend between opposite sides of the sidewall and over the powder bed, the sidewall and top wall configured to form a chamber portion of a turbulence chamber between the build module and the extraction housing, the top wall having a vacuum exit opening that is configured to fluidly connect to a vacuum source, the sidewall having a plurality of sidewall inlet flow channels that extend from an inlet opening at an exterior side of the sidewall to an outlet opening at an interior side of the sidewall;
• and
• a side exit channel is configured to extend along the top wall from a collector opening in communication with the chamber portion toward the vacuum exit opening.