Abstract: A computer-based method of providing control commands of a control command set for manufacturing a three-dimensional object with an additive manufacturing device. The method includes at least the following steps: a step of allocating input data that represent at least a partial surface of the object to be manufactured, where the partial surface has an initial surface texture defined by a set of initial texture parameter values that characterize the geometry of the initial surface texture; a step of determining a set of target texture parameter values that differ from the set of initial texture parameter values, and a step of generating control commands of a control command set to manufacture the partial surface by the additive manufacturing device with a surface texture that is defined by the set of target texture parameter values.

Abstract: Disclosed is a method for providing control data for an additive manufacturing device. The method includes accessing computer-based model data of a section of the object to be manufactured, defining a first portion and an adjoining second portion within the object section, and producing a data model of a region of a layer of the object section. Within the region a first portion cross-section cuts through the first portion and a second portion cross-section cuts through the second portion. An energy input parameter in the data model has, on average, a different value in the first portion cross-section than in the second portion cross-section and the energy beam is moved over the boundary of the first and second portion. Control data corresponding to the data model is provided for the generation of a control data set for the additive manufacturing device.

Abstract: Provided is an antimicrobial non-isotactic polymer based hard or semi-flexible surface in a thermoset and/or thermoplastic resin matrix wherein the active antimicrobial ingredient is copper oxide. Processes for preparing the same and applications thereof are also described.

Abstract: A process for producing a three-dimensional object by selectively layer-by-layer solidification of a powdery material layer at the locations corresponding to the cross-section of the object in a respective layer by exposure to electromagnetic radiation. The powdery material comprises at least one polymer which is obtainable from its melt only in substantially amorphous or completely amorphous form, or a polyblend which is obtainable from its melt only in substantially amorphous or completely amorphous form. The powdery material has a specific melting enthalpy of at least 1 J/g.

Abstract: A rail cover assembly includes first and second cover portions coupled to one another. The first and second cover portions have surface regions made from an antimicrobial material. The first cover portion has opposing and longitudinally-extending L-shaped lips. The second cover portion has opposing longitudinal edges for nesting with the first cover portion's lips.

Abstract: A standard powder bed fusion additive manufacture apparatus is provided with a device to modify the building space, including the powder feed for the building space, yielding a reduction in the active build area, with a concomitant reduction in the adjacent powder supply. A retrofit kit or assembly which is quickly emplaced on the existing equipment with little modification of the regular building space is provided, and is therefore readily removable when the building space is to be returned to its original condition. One advantage is the relatively quick manner in which the building space can be modified. A reduced area build piston is slideably received in a shaft depending from a cover that is emplaceable on the unmodified build area. The build piston moves with the pre-existing build platform. A like arrangement is provided for the feed container.

Abstract: A dual roller powder spreader assembly for use in layerwise manufacture in a powder bed fusion additive manufacture process utilizes in an embodiment tilting of the dual roller assembly such that a lead roller is raised upwardly relative to the powder bed in a sweep. This is accomplished using a mechanical cam-like engagement initiated at each end of the assembly's travel, causing what will then be the lead roller to rise as a whole relative to the now following roller, the latter pushing the powder pile across the powder bed. The tilt process is reversed at each end of travel.

Abstract: An interchangeable chamber (4) is provided for a device for producing a three-dimensional object by selectively layer-wise solidifying of a building material at locations that correspond to the cross-section of the object to be produced in the respective layer, wherein the interchangeable chamber comprises a building space (40) for receiving a building platform (41) on which the three-dimensional object (2) 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 (45) for storing building material and wherein the interchangeable chamber comprises a side wall (401) and a cover (400), wherein the cover (400) is adapted to close the interchangeable chamber (4) at the top such that building material (20) substantially cannot get through the cover out of nor into the interchangeable chamber and the cover is coupled with the side wall, in particular pivotably and/or displaceably coupled.

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: A method for producing a three-dimensional object by layer-wise applying and selectively solidifying a building material in powder form includes the steps of applying a layer of the building material over a working plane and selectively solidifying the layer at positions that correspond to a cross-section of the object to be produced by introducing energy and repeating the steps of applying and selectively solidifying until the object is completed. By doing so, the application step is carried out such that the application device moves at least twice over an area to be coated without an intermediate irradiation, and the step of selectively solidifying is carried out with an irradiation device that emits a radiation suited to solidify the building material.

Abstract: An additive manufacturing method includes providing a first and second scanners with fields of view that at least partially overlap. The method includes applying a layer of powder-based materials to the part bed and providing a number of laser sources that direct a number of laser beams to the first and second scanners. The laser beams are directed from the scanners to the part bed to selectively fuse the material to produce a layer of a three-dimensional part. The layer is formed by selectively directing laser energy to the material in a selected pattern, and synchronizing the movement of the laser beams to continuously process the selected pattern in each layer of the three-dimensional part. An additive manufacturing system includes first and second laser sources, first and second scanners, and a controller configured to operate the scanners and laser(s) for producing the three-dimensional printed part.

Abstract: A modular system (1) for producing a three-dimensional object (2) by layerwise application and selective solidification of a pulverulent build material (13) contains a first module (30, 34-36; 40, 41) suitable for carrying out a first process used for the production of the three-dimensional object (2), and at least a second and a third module (30, 34-36; 40,41) suitable for carrying out a further process used for the production of the three-dimensional object (2). The first to third modules (30, 34-36; 40, 41) are configured so that the second or the third module, or both, can selectively and replaceably be connected to the first module in such a way that their housings are coupled to one another directly.

Abstract: A method of training a detection system is able to acquire volume image data in an additively manufactured object for the detection of process irregularities, and comprises the steps of: a) receiving process irregularity data referring to a selected location within an additively manufactured reference object in which selected location a predefined process irregularity occurred during the additive manufacture of the object, b) acquiring volume image data of a volume of the reference object comprising at least the selected location by said detection system, c) identifying within the volume image data characteristic data which represent a difference between the volume image data of the selected location in comparison with the volume image data of at least one other location of the reference object and/or of a number of other additively manufactured objects in which no process irregularity has occurred and/or no process irregularity is suspected, d) assigning to the predefined process irregularity the characteris

Abstract: An interchangeable chamber for a device for manufacturing a three-dimensional object by selectively layer-wise solidifying building material, preferably powdery building material, at locations corresponding to the cross-section of the object to be manufactured in the respective layer, includes a container having an upper edge and a lower edge, a wall and a height-adjustable platform provided in the container, wherein the wall of the container has at its inside a first sealing device which adjoins the platform in a sealing position in such a way that the first sealing device and the platform cooperate for sealing the container towards the lower edge.

Abstract: Described is an unpacking device for a construction container of a device for additively fabricating manufacturing products, wherein the construction container has a continuous construction container wall and a height-adjustable build platform mounted therein, along with a method for controlling such an unpacking device. The unpacking device includes at least a receiving chamber, an unpacking chamber, a partition wall between the receiving chamber and unpacking chamber with a transfer opening, a construction container lifting device designed to move a construction container from a construction container receiving position into a construction container unpacking position, a build platform lifting device located in the receiving chamber and designed to move a build platform from a build platform initial position into a build platform unpacking position, and a control device for outputting at least one control signal to the construction container lifting device and build platform lifting device.

Abstract: A three-dimensional object is manufactured by selective sintering by means of electromagnetic radiation, wherein the powder comprises a polymer or copolymer having at least one of the following structural characteristics: (i) at least one branching group in the backbone chain of the polymer or copolymer, provided that in case of the use of polyaryletherketones (PAEK) the branching group is an aromatic structural unit in the backbone chain of the polymer or copolymer; (ii) modification of at least one end group of the backbone chain of the polymer or copolymer; (iii) at least one bulky group within the backbone chain of the polymer of copolymer, provided that in case of the use of polyaryletherketones (PAEK) the bulky group is not selected from the group consisting of phenylene, biphenylene, naphthalene and CH2- or isopropylidene-linked aromatics; (iv) at least one aromatic group non-linearly linking the backbone chain.

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: Disclosed is a method of heat-treating a titanium alloy part resulting from an additive manufacturing procedure, including arranging the titanium alloy part in an oven; heating to a first annealing temperature; maintaining the first annealing temperature for a first annealing duration; heating to a second annealing temperature, wherein the second annealing temperature exceeds the first annealing temperature; and subsequently cooling the titanium alloy part to room temperature. Further disclosed is a titanium alloy part that has been heat-treated using such a method.

Abstract: A method for providing control data for a generative layer construction device has a first step of accessing a data record which, at least for a partial region of an object cross section, specifies in which temporal sequence an energy beam bundle is to be moved in scanning lines over the places of this partial region to scan the buildup material. In a second step, the data record is changed such that in at least one of the layers for the respective partial region of an object cross-section, a check is carried out to determine whether the scan time required to scan the buildup material along a scanning line falls below a predefined minimum duration tmin and either a lower energy density of the energy beam bundle during scanning of the buildup material along this scanning line is specified and/or a wait time is specified before the energy beam bundle is moved along a further scanning line.