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: Disclosed is a method for controlling an energy input device of an additive manufacturing device. A beam bundle deflection center is assigned to each of the number of beam bundles from which this beam bundle is directed onto the build plane. Each beam bundle deflection center is assigned a projection center corresponding to a perpendicular projection of the position of the beam bundle deflection center onto the build plane. The directions of the movement vectors of the number of beam bundles when scanning the trajectories are defined such that at each of the solidification points in this section the movement vector has an angle with respect to a connection vector from this solidification point to the projection center of the beam bundle used, which angle is smaller than a predetermined maximum angle ?1.

Abstract: A method for producing a three-dimensional object on a support by applying layer by layer and selectively solidifying a building material in powder form. The method includes lowering the support to a predetermined height below a working plane, applying a layer of the building material in powder form in the working plane, selectively solidifying the applied powder layer at positions corresponding to a cross-section of the object to be produced and repeating the steps of lowering, applying and selectively solidifying until the object is completed. By doing so, the quantity of applied building material in powder form is reduced in a section in an actively controlled way or substantially no building material in powder form is applied in a section in an actively controlled way.

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: Disclosed is a method of providing control data for an additive manufacturing device. The method includes accessing computer-based model data of at least a portion of the object to be manufactured, generating at least one data model of a region of a building material layer to be selectively solidified for manufacturing the at least one object portion. The data model specifies solidification of the building material, and the end point of the at least one solidification path a set of energy introduction parameter values is specified which generates a reference value for the radiation power per unit area in the radiation impact area of the beam bundle on the building material which is lower than the reference value for the radiation power per unit area at other locations of the solidification path, and providing control data corresponding to the generated at least one data model for generating a control data set for the additive manufacturing device.

Abstract: A powder discharge unit for equipping and/or upgrading a device for generatively manufacturing a three-dimensional object by a selective layer-by-layer solidification of building material in powder form includes a powder container for receiving building material in powder form and a filling chamber for filling in building material in powder form into the powder container. The powder discharge unit is configured to fluidise the building material in powder form in the powder container and the building material in powder form in the filling chamber independently of one another.

Abstract: An interchangeable chamber is provided for a 3D printing device, wherein the interchangeable chamber includes a building space for receiving a building platform on which a three-dimensional object can be produced, which building space is designed to be temporarily open in the direction of a top of the interchangeable chamber, as well as optionally a storage container for storing building material and wherein the interchangeable chamber comprises a side wall and a cover, wherein the cover is adapted to close the interchangeable chamber at the top such that building material cannot get through the cover out of nor into the interchangeable chamber and the cover is coupled with the side wall.

Abstract: Disclosed is a method for providing control data for manufacturing a three-dimensional object including accessing computer-based model data of at least one portion of the object, at least one data model specifying the scanning of locations of the region to be selectively solidified, using at least one beam along a first trajectory and a second trajectory substantially parallel thereto, the motion vectors of the beams in the construction plane having mutually opposite directional components during the scan along the two trajectories, and the distance between a starting point of the second trajectory and an end point of the previously scanned first trajectory is less than half a beam width of the beam at the end point of the first trajectory ;and a providing control data of the at least one data model for the generation of a control data set.

Abstract: A method for providing control data for manufacturing at least one three-dimensional object by means of a layer-wise solidification of a building material in an additive manufacturing apparatus is provided. The method includes at least the following steps: a) determining the locations corresponding to the cross section of the at least one object, b) determining at least two different regions to be solidified in said at least one layer, wherein said at least two regions are chosen from the group of: sandwiched region, down-facing region and up-facing region, c) defining a scanning sequence for the beam so as to solidify the building material at least at the locations corresponding to said portion of the cross section of the object, wherein at an interface between a first and a second region differing from each other a scan line of the beam is continuous and at least one beam parameter value is changed.

Abstract: A calibration method serves for calibrating a manufacturing device for additively producing a three-dimensional object by applying layer by layer and selectively solidifying a building material. The manufacturing device comprises at least two scanning units, each of which is capable of directing a beam to different target points in the working plane, which are located within a scanning region assigned to the respective scanning unit, wherein the scanning regions region of the at least two scanning units overlap in an overlap area. At least a first of the at least two scanning units is assigned a first monitoring unit whose monitoring region extends to a target point of the first scanning unit and its proximity, wherein a change of a position of the monitoring region is carried out as a function of a change of a position of the target point.

Abstract: Disclosed is a composition including at least one polymer, wherein the polymer is in the form of a powder, and wherein the polymer includes at least one thermoplastic polymer. The thermoplastic polymer is selected from at least one polyaryletherketone and/or a copolymer and/or a block-copolymer and/or a polymer blend thereof, wherein the composition has a melt volume rate (MVR) of at least 5 cm3/10 min and a process of manufacturing and a use thereof. Also disclosed are a process for the manufacture of a construction element and the construction element thereof.

Abstract: Disclosed are powder mixtures for use in the manufacture of three dimensional objects. In the respective powder mixtures, a first material includes an aluminium alloy or a mixture of elemental precursors thereof, and is in powder form. The second material includes a metal powder of Zr and/or Hf. By the addition of the second material, it is possible to prepare three dimensional objects with high ultimate tensile strength and yield strength by additive manufacturing. Further disclosed are processes for the preparation of corresponding powder mixtures and three dimensional objects, the three dimensional objects themselves, devices for implementing the processes, and uses of the powder mixture.

Abstract: In a method of providing a flow for a process chamber of a device for producing a three-dimensional object by layer-wise application and selective solidification of a building material in a build area a process gas is supplied to the process chamber in a lower altitude region of the process chamber, wherein the process chamber includes a gas inlet for introducing the process gas into the process chamber and a gas outlet for discharging the process gas from the process chamber. The gas inlet and the gas outlet are provided in the lower altitude region of the process chamber and the process gas flows in a main flow from the gas inlet to the gas outlet, and wherein a secondary flow is located in a sub-region of the lower altitude region, which sub-region is located above a bottom surface of the process chamber surrounding the build area.

Abstract: An additive manufacturing device for manufacturing a three-dimensional object by selective solidification of a building material layer by layer, including a process chamber having a chamber wall, wherein the chamber wall of the process chamber has at least one elongate opening. The device includes a cover device having a cover area for covering and/or shielding the at least one opening, the extent of the cover area being variable in the longitudinal direction of the opening, and the cover device includes a plurality of individual elements of similar type that are connected to one another in such a way that they are movable relative to one another in the longitudinal direction of the opening.

Abstract: The present invention relates to a method for the production of a three-dimensional object (2) by way of layered solidification of a powder construction material (11) by way of electromagnetic radiation, in particular laser radiation, having the steps: scanning points, which correspond to a cross section of the object (2) to be produced, of an applied layer of the powder construction material (11) with an electromagnetic beam (22) from a radiation source (21) for purposes of selectively solidifying the powder construction material (11), conducting a gas flow (33) across the applied layer during the scanning with the electromagnetic beam (22) and performing an irregularity determination with regard to the presence of a process irregularity with regard to at least one process parameter during the production, wherein during the scanning by way of the electromagnetic beam (22), the scanning process at least one present point of the cross section to be solidified is interrupted on the basis of a result of the irre

Abstract: A calibration method serves for calibrating a manufacturing device for additively producing a three-dimensional object by applying layer by layer and selectively solidifying a building material. The manufacturing device comprises at least two scanning units, each of which is capable of directing a beam to different target points in the working plane, which are located within a scanning region assigned to the respective scanning unit, wherein the scanning regions region of the at least two scanning units overlap in an overlap area. At least a first of the at least two scanning units is assigned a first monitoring unit whose monitoring region extends to a target point of the first scanning unit and its proximity, wherein a change of a position of the monitoring region is carried out as a function of a change of a position of the target point.

Abstract: Powder mixture for the use as building material for manufacturing a three-dimensional object by solidifying the building material layer by layer at the positions corresponding to the cross-section of the three-dimensional object in the respective layer, in particular by exposure to radiation, wherein the powder mixture comprises a first powder and a second powder, wherein the first powder comprises powder particles of a first thermoplastic polymer material and a reinforcement material, wherein the reinforcement material is at least partially embedded in the powder particles of the first powder and/or adhered to the surface of the powder particles of the first powder, wherein the second powder comprises powder particles of a second thermoplastic polymer material which is the same as or different from the first thermoplastic polymer material, wherein the powder particles of the second powder do not comprise the reinforcement material or comprise it only in an amount of at most 50% by weight relative to the amou

Abstract: Disclosed are mixtures for use in additive manufacturing, wherein the powder mixture comprises first and second materials. The first material includes a metal alloy or a mixture of elemental precursors thereof, and is in powder form. The second material includes a reinforcement material comprising powder particles having a particle diameter of from 1 to less than 30 ?m (as determined by laser scattering or laser diffraction). The inventive powder mixtures allows for the processing to three dimensions objects which are free of cracking and which thus have favourable mechanical characteristics. Further disclosed are processes for the preparation of corresponding powder mixtures and three dimensional objects, three dimensional objects prepared accordingly and devices for implementing processes for the preparation of such objects, as well as the use of a corresponding powder mixture to suppress crack formation in a three-dimensional object, which is prepared by additive manufacturing.

Abstract: The invention relates to a method for providing required construction material information in the context of producing at least one three-dimensional object using a generative layer construction device, having the following steps: accessing data of a layer to be applied in a first data set in which for each layer to be applied during the production process, it is indicated whether construction material is to be solidified selectively in the layer and if so, at which locations in said layer the construction material is to be solidified; dividing the area of the layer to be applied into sub-regions; assigning weighting factors to the sub-regions, and ascertaining a construction material quantity to be supplied to the coating device in order to apply the layer, wherein the construction material quantity is ascertained using the weighting factors assigned to individual sub-regions and is provided as required construction material information.

Abstract: A method of manufacturing an object (3) in a build area (22) by means of a successive layer-by-layer solidification of a building material in powder form (18) comprises the steps: a) applying a layer of the building material in powder form (18) having a predetermined thickness d2 onto a layer of the building material already previously applied which has been solidified in a region corresponding to a cross section of the object (3), wherein, for applying the building material (18), a recoater (5, 15) is moved in a direction (B) across the layer already previously applied, and b) selectively solidifying the building material (18) applied in step a) in a region corresponding to a cross section of the object (3), wherein, prior to the application of a layer, for a solidified region having a thickness d1 in the layer applied before, the maximum (MAX) of the product of the extension of this solidified region in movement direction (B) of the recoater (5) and the thickness d1 is determined and during the applicati