FLOW DIRECTING SYSTEM AND METHOD FOR ADDITIVE MANUFACTURING SYSTEM

An additive manufacturing (AM) system (10) includes a housing (18) defining a chamber (20), a build platform (22) disposed within the chamber (20), and an upper gas inlet (76) configured to supply an upper gas flow (72) in a first direction (11) parallel to the build platform (22). The AM system (10) includes a lower gas inlet (84) disposed in the chamber (20) and configured to supply a lower gas flow (92) in a second direction (15) toward a bottom wall (24) of the chamber (20), and a flow directing system (96) configured to receive the lower gas flow (92) and redirect the lower gas flow (92) in the first direction (11) parallel to the build platform (22). The AM system (10) includes one or more gas delivery devices (66, 82) fluidly coupled to the upper and lower gas inlets (76, 84) and configured to regulate one or more flow characteristics of the upper and lower gas flows (72, 92) and a gas outlet (112) configured to discharge the upper and lower gas flows (72, 92) from the chamber (20). 一种增材制造(AM)系统(10)，包括