Abstract: A metering device serves as an equipping or retrofitting kit for a device for producing a three-dimensional object by means of solidifying, layer by layer, a building material in powder form at those positions that correspond to the cross-section of the object to be produced in the respective layer. The metering device has a metering element, which metering element is rotatable about an axis, preferably an axis of its own, particularly preferably about an, in particular its own, longitudinal axis and which is suitable for dispensing the building material in powder form in a metered manner. The metering element is designed to dispense locally different amounts of powder along the direction of the axis.

Abstract: Disclosed is a method for generating an irradiation control data set for creating control data for a device for additive manufacturing of a number of components in a manufacturing process in which at least one layer of a build material is introduced into a process space and the build material of the layer is selectively solidified to form at least one component layer by irradiating at least one section of the layer using a plurality of irradiation resources, wherein layer data are divided into a plurality of work packages, these work packages are put in an order and an irradiation resource is selected taking into account an execution time determined for the irradiation resource to which one of the work packages is assigned taking into account a specified set of evaluation rules, and this is repeated until to a predetermined termination criterion is reached.

Abstract: The invention describes a laser printing system (100) for illuminating an object moving relative to a laser module of the laser printing system (100) in a working plane (180), the laser module comprising at least two laser arrays of semiconductor lasers and at least one optical element, wherein the optical element is adapted to image laser light emitted by the laser arrays, such that laser light of semiconductor lasers of one laser array is imaged to one pixel in the working plane of the laser printing system, and wherein the laser printing system is a 3D printing system for additive manufacturing and wherein two, three, four or a multitude of laser modules (201, 202) are provided, which are arranged in columns (c1, c2) perpendicular to a direction of movement (250) of the object in the working plane (180), and wherein the columns are staggered with respect to each other such that a first laser module (201) of a first column of laser modules (c1) is adapted to illuminate a first area (y1) of the object and a

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 method for the post-treatment of particles carried along in a process gas of a device for the generative manufacturing of three-dimensional objects, wherein the particles are conducted to a filter chamber. An oxidant is added to the particles and that an oxidation reaction of the particles with the oxidant is initiated.

Abstract: Disclosed is a flow device for an additive manufacturing device. The device includes a gas supply line located outside the process chamber to conduct gas to a gas inlet. The gas supply line includes a first line section extending in a first extension direction and a maximum width that extends transverse to the first extension direction and parallel to the build area. A length of the first line section is at least half as large as the maximum value of the width. The first line section also includes a first subsection spaced from the gas inlet and including a first flow conditioning unit and a wall of the first line section. The first flow conditioning unit substantially aligns the gas stream in the first extension direction.

Abstract: A flow device serves for a 3D printer. The device includes a gas conveying device for generating a gas stream and a process chamber with a build area for building the object. The process chamber includes a first gas inlet for introducing a gas stream into the process chamber, and a first gas outlet and a second gas outlet for discharging the gas stream. The first gas outlet is arranged closer to the build area than the second gas outlet in a direction perpendicular to the build area, and the first gas outlet is provided substantially within a lower third of a distance of the build area from a process chamber ceiling a first height range of the process chamber with respect to its extension in a direction perpendicular to the build area and the second gas outlet is provided substantially within the upper four fifths of the distance of the build area from the process chamber ceiling.

Abstract: Plastic powder for use as a building material for manufacturing a three-dimensional object by layer-by-layer melting and solidification by hardening of the building material at the positions corresponding to the cross-section of the three-dimensional object in the respective layer by exposure to radiation, preferably by exposure to NIR radiation, wherein the plastic powder comprises a dry blend of polymer-based particles and particles of a NIR absorber, wherein the NIR absorber comprises carbon black or is carbon black and wherein the weight percentage of carbon black in the total weight of polymer and carbon black particles is in the range of at least 0.02% and at most 0.45%, and/or wherein the carbon black has a mean primary particle diameter in the range of from 15 nm to 70 nm, preferably of at least 26 nm and/or at most 58 nm.

Abstract: A method (V) for producing a three-dimensional object (2) by applying and selectively solidifying a powdery construction material (13) layer by layer includes the steps: a) applying (Z) a layer of the construction material (13) onto a construction field in a working plane (10) by means of a recoating device (14) moving in a moving direction (B) over the working plane, b) selectively solidifying (Y) the applied layer of the construction material (13) at positions, which correspond to a cross-section of the object (2) to be produced, and c) repeating (X) the steps a) and b) until the object is completed. The construction material is stored during step a) in a recoating unit (40a-e) arranged at the recoating device (14) within a space between two recoating elements (42a, 42b) mutually spaced apart from each other in the moving direction of the recoating device.

Abstract: Disclosed is a method for providing control data for an additive manufacture device having a first step of accessing model data, and a second step of generating a data model in which a construction material layer region to be solidified during the production of an object section is specified for a construction material layer. The region to be solidified is divided into a first sub-region and a second sub-region, and a respective solidification scan of the region locations to be solidified is specified in a data model. The scan solidifying the construction material, and a repeated scan, is specified at the locations of the second sub-region but not at the locations of the first sub-region. The energy input parameter during the repeat scan is measured such that the temperature of the construction material lies above a melting temperature. The method further includes a third step of providing data models generated in the second step as control data for integrating into a control data set.

Abstract: A method for providing control data to an additive manufacturing device includes a first step of accessing computer-based model data of a partial area of a cross-section of the object, and a second step of generating a data model of the sub-region, by specifying a solidification of the building material by at least one energy beam bundle along at least one solidification path. A plurality of solidification path sections are scanned at least twice with an energy beam bundle and the amount of energy to be introduced during the scanning is specified so that either the amount of energy introduced during the first scanning or a subsequent scanning is is too small to cause a solidification of the building material. In a third step, control data corresponding to the data model generated in the second step are provided for generating a control data set for the additive manufacturing device.

Abstract: Disclosed is an additive manufacturing apparatus. The apparatus includes a residual powder chamber with a receiving opening to receive excess powdered material. A region between the construction area and the receiving opening has at least one flow restricting device. A region between a construction area of the apparatus and the residual powder chamber and/or at least a part of the residual powder chamber is preferably covered by at least one cover element leaving the receiving opening free. The surface of the cover element least one flow restricting device for the powdered construction material.

Abstract: A measuring system serves for equipping or retrofitting a device for manufacturing a three-dimensional object by selective layerwise solidification of a building material. The device includes an irradiator for selectively irradiating a layer of the building material applied in a working plane of the device at locations corresponding to a cross-section of the object to be manufactured. The irradiator includes at least two irradiation units, and each irradiation unit can be projected onto a pixel in the working plane and can be at least switched on and off. The measuring system includes at least one camera for determining and evaluating the radiation emitted by the irradiator and/or the position and/or orientation of the irradiation unit(s) in absolute and/or relative to one another, and at least one distance sensor for detecting an extension in a direction (z) perpendicular to the working plane.

Abstract: A control method serves for controlling at least one solidification device of an additive manufacturing device for manufacturing a three-dimensional object by means of an additive layer build method in which at least one object is manufactured by repeated application of a layer of a building material to a build area and by selective solidification of the applied layer at positions corresponding to a cross-section of the object to be manufactured, wherein a gas having a plurality of flow directions which essentially are not aligned in the same direction flows across the build area.

Abstract: The invention relates to a computer-assisted method for examining an input data set of a generative layer building device, including comparing at least one parameter value in a computer-based model of an object that is to be produced using the generative layer building device, to a limiting parameter value which is an extreme value for the parameter able to be obtained in a method for producing the object, and particularly an extreme value for the parameter that can be obtained in a process-stable manner.

Abstract: The invention describes a laser printing system (100) for illuminating an object moving relative to a laser module of the laser printing system (100) in a working plane (180), the laser module comprising at least two laser arrays of semiconductor lasers and at least one optical element, wherein the optical element is adapted to image laser light emitted by the laser arrays, such that laser light of semiconductor lasers of one laser array is imaged to one pixel in the working plane of the laser printing system, and wherein the laser printing system is a 3D printing system for additive manufacturing and wherein two, three, four or a multitude of laser modules (201, 202) are provided, which are arranged in columns (c1, c2) perpendicular to a direction of movement (250) of the object in the working plane (180), and wherein the columns are staggered with respect to each other such that a first laser module (201) of a first column of laser modules (c1) is adapted to illuminate a first area (y1) of the object and a

Abstract: The invention relates to a computer-assisted method for generating a control data set for an additive layer manufacturing device. In a first step, a layer data set is accessed, wherein points are marked in the data model which correspond to an object cross-section and at which the bid-up material should be solidified. In a second step, the layer data set is modified in such a way that for at least a portion of the object cross-section, the number of beams required for solidifying the build-up material inside said portion is determined preferably automatically, according to quality specifications of the portion and/or a manufacturing time of the object. In a third step, the modified layer data set is provided as a control data set for the additive layer manufacturing device.

Abstract: Method for cooling a three-dimensional object manufactured by layer-wise selective solidification of a pulverulent building material and non-solidified building material in which the three-dimensional object is embedded by a treatment with a fluid medium. The fluid medium is constituted by a carrier gas that is specifically enriched with an additional component which comprises a further gas and/or a liquid and/or by a gas mixture from which specifically at least one mixture components is at least partially withdrawn.

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 and device for generating control data for an additive manufacturing device are described, wherein build-up material is built up and selectively solidified. Irradiating the build-up material on a build field with at least one energy beam occurs An impingement surface of the energy beam is moved on the build field in order to melt the build-up material in a target area in and around the impingement surface. For generating the control data, optimization criteria and/or secondary and/or boundary conditions relating to a local target temperature distribution in the target area of the build-up material are defined so that melting of the build-up material is effected as heat conduction welding. Based on this, an optimized intensity profile of the energy beam is determined, which is substantially non-rotationally symmetric at the impingement surface on the build field.