Abstract: The invention concerns a method for the removal of a part (41, 55) of a particle collecting device (40, 41, 42, 55), which part is loaded with at least highly flammable particles (51). The part (41, 55) is removed from a process gas cleaning device (100) of an additive manufacturing device (1) by means of the following steps. An inert gas (50, 250) which substantially encloses the particles (51) is provided. The part (41, 55) of the particle collecting device (40, 41, 42, 55), is removed from the process gas cleaning device (100), wherein the particles (51) remain enclosed in the inert gas (50, 250).

Abstract: A method of providing a particulate material from an at least substantially metallic and/or ceramic starting material, comprising the following steps: (a) generating the particulate material from the starting material by vaporizing the starting material by introducing energy, preferably radiation energy, in particular by means of at least one laser, into the starting material and subsequently at least partially condensing the vaporized starting material, b) collecting the particulate material in at least one receiving and/or transporting device, in particular at least one container, c) receiving, in particular storing, and/or transporting the particulate material in the receiving and/or transporting device and/or in a further receiving and/or transporting device such that it can be used for a subsequent process, in particular in a state of at least non-permanent passivation, and d) providing the particulate material for the subsequent process.

Abstract: Disclosed is a filter system for an additive manufacturing device for purifying a process gas of the additive manufacturing device wherein, in order to purify a volume of process gas during operation, the filter system has at least one permanent filter. The permanent filter is configured so as to be thermally stable in a manner such that during operation, the permanent filter is stable at a temperature of more than 110° C. Further disclosed is an additive manufacturing device as well as an additive manufacturing process.

Abstract: 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.

Abstract: A method for determining a distance in an additive manufacturing device includes emitting a number of directed beams using a number of beam sources, detecting at least one of the directed beams from a first beam source using a first detector and generating a signal in dependence on the at least one beam impinging on the least one detector, wherein a recoating element is spatially arranged between the first beam source and the first detector, and determining a distance between a boundary of the recoating element and a surface of a building base and/or an article placed on the building base, based on the signal generated by the detector and using an evaluation unit.

Abstract: Method for moderating a reaction of metal particles, in particular metal condensates, preferably from an additive manufacturing process, in particular a laser sintering or laser melting process, wherein the metal particles are combined, in particular mixed, with an at least partially meltable inerting material, wherein the inerting material comprises particles with a particle size of less than or equal to 100 µm.

Abstract: The present invention relates to a method for the post-treatment of particles (51) carried along in a process gas (50) of a device (1) for the generative manufacturing of three-dimensional objects, wherein the particles (51) are conducted to a filter chamber (40). An oxidant (60) is added to the particles (50) and that an oxidation reaction of the particles (50) with the oxidant (60) is initiated.

Abstract: A method of providing a particulate material from an at least substantially metallic and/or ceramic starting material, comprising the following steps: (a) generating the particulate material from the starting material by vaporizing the starting material by introducing energy, preferably radiation energy, in particular by means of at least one laser, into the starting material and subsequently at least partially condensing the vaporized starting material, b) collecting the particulate material in at least one receiving and/or transporting device, in particular at least one container, c) receiving, in particular storing, and/or transporting the particulate material in the receiving and/or transporting device and/or in a further receiving and/or transporting device such that it can be used for a subsequent process, in particular in a state of at least non-permanent passivation, and d) providing the particulate material for the subsequent process.