Additive manufacturing facility with successive nested confinement chambers

1. An additive manufacturing facility operating in an automated and contained manner, the facility comprising:

a containment chamber inside which is installed a plurality of additive manufacturing machines, each machine comprising a manufacturing chamber and making it possible to manufacture parts in an automated and contained manner inside the chamber;

inside the containment chamber, a supply device and a supply circuit for supplying, in an automated and contained manner, the plurality of additive manufacturing machines with an additive manufacturing powder ready to be used in additive manufacturing, wherein the supply device is contained within a protective chamber provided inside the containment chamber, and wherein a conduit or conduits of the supply circuit pass through a wall of the protective chamber in a sealed manner;

inside the containment chamber, a conveying device for conveying additive manufacturing container/tray assemblies or additive manufacturing trays, the conveying device comprising at least one conveying chamber circulating between the plurality of additive manufacturing machines in order to supply, in an automated and contained manner, the plurality of additive manufacturing machines with clean assemblies or trays and to retrieve, in an automated and contained manner, the assemblies or trays that have been used by the plurality of additive manufacturing machines along with the manufactured parts; and

inside the containment chamber, a cleaning device comprising at least one cleaning chamber for cleaning, in an automated and contained manner, the assemblies or trays in the at least one cleaning chamber.

2. A facility according to claim 1 , wherein the facility further comprises:

a device for controlling air pressure inside the containment chamber;

devices for controlling air pressure inside the manufacturing chambers of the plurality of additive manufacturing machines;

a device for controlling air pressure inside each conveying chamber of the conveying device; and

a device for controlling air pressure inside the at least one cleaning chamber of the cleaning device.

3. A facility according to claim 1 , wherein a ceiling of the containment chamber is equipped with at least one ventilator through which air is introduced into the containment chamber, and

wherein at least one air extractor through which air is extracted from the containment chamber is provided level with a floor of the containment chamber.

4. A facility according to claim 1 , wherein each of the plurality of additive manufacturing machines, along with the cleaning device and the conveying device, are provided with a management interface located outside the containment chamber.

5. A facility according to claim 1 , further comprising, located outside the containment chamber:

(a) a management interface for each of the plurality of additive manufacturing machines, for the cleaning device, and for the conveying device; and

(b) means for supplying air and/or electrical power and/or pneumatic power to the plurality of additive manufacturing machines, the cleaning device, and the conveying device,

wherein (1) computer links connecting the plurality of additive manufacturing machines, the cleaning device, and the conveying device to the management interface, and (2) connections, from the plurality of additive manufacturing machines, the cleaning device, and the conveying device to the means for supplying air and/or electrical power and/or pneumatic power, extend between a top of the plurality of additive manufacturing machines, the cleaning device, and the conveying device and a ceiling of the containment chamber.

6. A method for the containment of an additive manufacturing facility, the facility comprising a containment chamber inside which is installed a plurality of additive manufacturing machines is installed, each of the plurality of additive manufacturing machines comprising a manufacturing chamber and making it possible to manufacture parts in an automated and contained manner inside the manufacturing chamber, the facility further comprising, inside the containment chamber, (a) a supply device and a supply circuit for supplying, in an automated and contained manner, the plurality of additive manufacturing machines with an additive manufacturing powder ready to be used in additive manufacturing, (b) a conveying device for conveying additive manufacturing container/tray assemblies or additive manufacturing trays, the conveying device comprising at least one conveying chamber circulating between the plurality of additive manufacturing machines in order to supply, in an automated and contained manner, the plurality of additive manufacturing machines with clean assemblies or trays and to retrieve, in an automated and contained manner, assemblies or trays that have been used by the plurality of additive manufacturing machines along with the manufactured parts, and (c) a cleaning device comprising at least one cleaning chamber for cleaning, in an automated and contained manner, the assemblies or trays in the at least one cleaning chamber, the containment method comprising:

keeping air inside the containment chamber at a pressure below that of air outside the containment chamber,

wherein the supply device is contained in a protective chamber provided inside the containment chamber, and

wherein air pressure inside the protective chamber is kept below air pressure maintained inside the containment chamber.

7. A method according to claim 6 , wherein air pressure inside each conveying chamber is equal to air pressure inside the manufacturing chamber of each of the plurality of additive manufacturing machines.

8. A method according to claim 6 , wherein a composition of air inside each conveying chamber is kept identical to a composition of air inside the manufacturing chamber of each of the plurality of additive manufacturing machines.

9. A method according to claim 6 , wherein the cleaning device comprises a dry cleaning chamber, and

wherein air pressure inside the dry cleaning chamber is kept below air pressure maintained inside the containment chamber.