A machine for machining workpieces and/or for producing molded bodies by location-selective solidification of material powder to form connected regions by means of a focused laser beam, including: a process chamber which can be closed by a process chamber door and which encloses a process space, a material powder container cabinet, which can be closed by a door, for storing material powder, and a suction system. The suction system has a fan for generating an air flow, a first suction apparatus fluidically connected to the fan by a first waste air duct to suction particles out of the process space, and a second suction apparatus fluidically connected to the fan by a second waste air duct to suction particles out of the material powder container cabinet. The first suction apparatus has means for controlling its suction power and/or the second suction apparatus has means for controlling its suction power.

A gas-recycling device according to an embodiment includes a particle remover, a liquid remover, and a supplier. The particle remover brings a mist of liquid into contact with a gas which includes particles and is discharged from an apparatus, to remove the particles from the gas. The liquid remover removes the liquid from the gas having passed through the particle remover. The supplier supplies the gas to the apparatus.

A gas-recycling device according to an embodiment includes a particle remover, a liquid remover, and a supplier. The particle remover brings a mist of liquid into contact with a gas which includes particles and is discharged from an apparatus, to remove the particles from the gas. The liquid remover removes the liquid from the gas having passed through the particle remover. The supplier supplies the gas to the apparatus.

A mobile additive manufacturing installation (10) comprises a main self-supporting frame, a main manufacturing housing (14) closed in leaktight fashion, at least one main additive manufacturing machine (M1) installed in the main manufacturing housing, a main inerting device (26), a main circulation path (32) in the main manufacturing housing (14), a main airlock (34), and a main device (42) for treatment of the air circulating inside the main manufacturing housing (14). The main treatment device (42) makes it possible to supply the inside of the main manufacturing housing (14) with air withdrawn outside the installation, to withdraw the air present in the main manufacturing housing (14) and in the main airlock (34), and to manage the pressure of the air present in the main manufacturing housing (14) and in the main airlock (34).

We disclose herein a recoating device for an additive manufacturing process, the device comprising: a recoating member for guiding a volume of material to a target area and a support structure on which the recoating member is mounted. The recoating device is configured such that the recoating member moves in a first direction along a longitude of the target area and the recoating member moves in a second direction different to the first direction.

Methods are generally provided for making an object(s) from powder. In one embodiment, the method includes: (a) applying a layer of powder on a build platform; (b) irradiating at least part of a layer of powder to form a build wall defining at least one internal cavity therein; (c) moving at least one of the build platform downward or the build unit upward in a direction substantially normal to the layer of powder; and (d) repeating at least steps (a) through (c) to form the build wall. The build wall defines at least one passageway therein, and wherein the at least one passageway has an inlet and an outlet defined in the layer of powder.

Methods and systems for fabricating a component by consolidating a particulate include a build platform configured to receive the particulate, a particulate dispenser configured to deposit the particulate onto the build platform, and a consolidation device configured to consolidate at least a portion of the particulate to form a component. The methods and systems also include a first actuator assembly configured to induce rotation of the build platform about a rotation axis at a first speed. The rotation axis extends through a center of the build platform. The methods and systems further include a second actuator assembly including an actuator and a shaft extending along the rotation axis. The actuator is configured to cause rotation of the shaft about the rotation axis at a second speed different from the first speed. The shaft is coupled to the build platform and configured to induce linear movement of the build platform along the rotation axis upon rotation of the shaft.

A additive manufacturing system includes a containment housing operable to form a containment chamber with a low pressure operating atmosphere and an additive manufacturing build housing within said containment housing.

A device for metering one or more powder(s) (A, B) to produce a flow (23) of powder(s) and of a carrier gas at a given volume flow rate, comprises: at least a first source (25) suitable for supplying a first flow (27) comprising a first powder (A) and a first carrier gas (G1) substantially at the given volume flow rate, a source (33) of a carrier gas suitable for supplying an adjustment carrier gas flow (35) substantially at the given volume flow rate, an outlet junction (49) for emitting said flow of powder(s) and of carrier gas, a first proportional valve (59), an adjustment proportional valve (75), and a control system (21) 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.

Provided is a metal 3D printer provided with a powder layer formation device for uniformly distributing a metal powder and forming a powder layer for each of a plurality of division layers obtained by horizontally dividing a three-dimensional object, a hermetically sealed chamber, a laser irradiation device for irradiating laser light to a predetermined irradiation region on each of the powder layers and forming a sintered layer, an inert gas supplying device for supplying an inert gas to the chamber and discharging fumes to the outside of the chamber, and a control device for issuing a command to start irradiation of the laser light to the laser light irradiation device after a standby time has elapsed that corresponds to a residual amount of fumes in the chamber, such that irradiation by the laser light at the necessary energy is unaffected.