The present disclosure provides three-dimensional (3D) printing systems, apparatuses, software, and methods for safe production of at least one requested 3D object, and for passivation of material accumulated on a filter of the 3D printing system.

A passivation device for passivating filter residues of a filter device arranged in a process gas circuit of an additive manufacturing apparatus includes a reaction unit having an inlet suitable for supplying an oxidant, a coupling unit adapted to be coupled to the filter device for introducing filter residues into the reaction unit, a discharge unit suitable for discharging passivated filter residues from the reaction unit, and an energy supply unit suitable for effecting a reaction between the filter residues and the oxidant in the reaction unit.

A passivation device for passivating filter residues of a filter device arranged in a process gas circuit of an additive manufacturing apparatus includes a reaction unit having an inlet suitable for supplying an oxidant, a coupling unit adapted to be coupled to the filter device for introducing filter residues into the reaction unit, a discharge unit suitable for discharging passivated filter residues from the reaction unit, and an energy supply unit suitable for effecting a reaction between the filter residues and the oxidant in the reaction unit.

Various embodiments of the teachings herein include an apparatus for identifying a smoke event in an electron beam melting installation comprising: a current meter measuring a grounding current; and a processor programmed to identify a smoke event by evaluating the grounding current.

Various embodiments of the teachings herein include an apparatus for identifying a smoke event in an electron beam melting installation comprising: a current meter measuring a grounding current; and a processor programmed to identify a smoke event by evaluating the grounding current.

An additive manufacturing (AM) system includes a housing defining a chamber, a build platform disposed in the chamber at a first elevation, and a lower gas inlet disposed at a second elevation and configured to supply a lower gas flow. The AM system includes a contoured surface extending between the lower gas inlet and the build platform to direct the lower gas flow from the second elevation at the lower gas inlet to the first elevation at the build platform, where the contoured surface discharges the lower gas flow in a direction substantially parallel to the build platform. The AM system also includes one or more gas delivery devices coupled to the lower gas inlet to regulate one or more flow characteristics of the lower gas flow, and a gas outlet configured to discharge the lower gas flow.

An additive manufacturing system with a build chamber has a halide vessel that generates a halide gas and a dissociation chamber with a filament. Metal condensate is contacted with the halide gas to form a gaseous metal halide compound. The gaseous metal halide compound is decomposed to deposit metal on the filament. In an example, titanium reacts with gaseous iodine to form gaseous titanium tetraiodide.

A three-dimensional (3D) printer includes a powder layer forming device (2) uniformly spreading material powder in a molding space (R) in a chamber (1) to form a powder layer (8), and a laser irradiation device (4) irradiating a laser beam (L) on a predetermined irradiation region of the powder layer to form a sintered layer (9). The powder layer forming device includes a recoater head (23) discharging the contained material powder to the molding space, a blade (31, 33) leveling the discharged material powder to a predetermined thickness, and a holding member (35, 37) holding the blade on the recoater head, wherein the blade is flexible, and the blade and the holding member are nonmagnetic and electrically conductive.

An apparatus for laser materials processing including a laser (4) for generating a laser beam and a laser head (5) which is movable along at least one spatial direction and is connected to the laser via a light guide, and which emits a laser beam (7) capable of processing a material. The present invention also relates to an apparatus for selective laser melting or selective laser sintering having an apparatus for laser materials processing.

A lamination molding apparatus which can improve the lamination molding accuracy, is provided. A lamination molding apparatus, including a chamber covering a desired molding region, the chamber being filled with an inert gas of a predetermined concentration; and a molding table provided in the molding region, the molding table being configured so as to be capable of being moved vertically by a driving mechanism; wherein the molding table is configured to be temperature-controllable; and a thermostatic section is provided in between the molding table and the driving mechanism or in the driving mechanism, temperature of the thermostatic section being maintained substantially constant, is provided.