| CPC B22F 12/70 (2021.01) [B01D 46/10 (2013.01); B01D 46/121 (2022.01); B33Y 30/00 (2014.12); B33Y 40/00 (2014.12); B01D 45/08 (2013.01)] | 5 Claims |
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1. A three-dimensional powder bed fusion additive manufacturing (PBF-AM) apparatus, comprising:
a stage on which powder is spread;
a vacuum chamber in which the stage is disposed;
a vacuum pump that evacuates gas in the vacuum chamber; and
powder capturing devices disposed on an intake side of the vacuum pump;
wherein
the powder capturing devices comprise:
a plurality of flow path forming units that form continuous gas flow paths from intake units positioned on the vacuum chamber side to exhaust units positioned on the vacuum pump side, and
the plurality of flow path forming units comprise at least:
first flow path forming units having first catching units that cause the powder sucked from the intake units to collide and then catch the powder, the first flow path forming unit comprising a plurality of first plate-shaped units inclined with respect to a reference axis line connecting the intake unit and the exhaust unit; and
second flow path forming units having second catching units that cause the powder passing through the first flow path forming units to collide and then catch the powder, the second flow path forming unit comprising a plurality of second plate-shaped units inclined in a direction opposite to the first plate-shaped units with respect to the reference axis line,
wherein each of the plurality of first plate-shaped units is arranged to form a V-shape with a respective one of the plurality of second plate-shaped units along the reference axis line with a drop unit formed as a slit where each of the plurality of first plate-shaped units meets the respective one of the second plate-shaped units.
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