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Jean-Luc Sebal

Guillaume Cadoux

Disclosed is a switching system for a facility for 3D printing by spraying at least a first powder, including a body defining: at least one first upstream gas conduit configured to receive a gas; at least one first upstream powder conduit configured to receive the first powder; at least one first downstream discharge conduit for discharging the first powder; and a downstream work conduit configured in order to supply a nozzle designed for depositing at least the first powder. The system further includes a distributor that is movable with respect to the body, preferably in rotation about an axis, between a rest position, in which the first upstream powder conduit is fluidly connected, via the distributor, to the first downstream discharge conduit, and at least a first supply position, in which the first upstream powder conduit is fluidly connected, via the distributor, to the downstream work conduit.

Powder feed system and method for 3D printing by powder spraying

A device for metering one or more powder(s) (A, B) to produce a flow () of powder(s) and of a carrier gas at a given volume flow rate, comprises: &#x22c5;at least a first source () suitable for supplying a first flow () comprising a first powder (A) and a first carrier gas (G1) substantially at the given volume flow rate, &#x22c5;a source () of a carrier gas suitable for supplying an adjustment carrier gas flow () substantially at the given volume flow rate, &#x22c5;an outlet junction () for emitting said flow of powder(s) and of carrier gas, &#x22c5;a first proportional valve (), &#x22c5;an adjustment proportional valve (), and &#x22c5;a control system () suitable for controlling at least the first proportional valve and the adjustment proportional valve so that the flow of powder(s) and of carrier gas has a volume flow rate substantially equal to the given volume flow rate.

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Montvalent, France

Jean-Luc Sebal