The aim of the invention, which relates to a method for producing a 3D structure in a 3D printing method, is that of specifying a solution by means of which an automated correction of the 3D printing data used for the 3D printing method for the 3D structure (30) to be generated is carried out when deviations occur during the manufacturing of the 3D structures (31). This aim is achieved in that: the 3D printing data are data of a target geometry (30) of the 3D structure; the generated 3D structure (31) is three-dimensionally measured after the 3D structure (31) is generated, wherein three-dimensional de facto incomplete data of an actual geometry (31) of the 3D structure are generated which are reproduced in a model (34) that comprises one or more unscanned regions (35); first deviations between points P (37) on a surface of the target geometry of the 3D structure and associated points P' (36) on the surface of the actual geometry (31) of the 3D structure are determined in the scanned regions; further deviations (29) in the unscanned regions (35) of the surface of the generated 3D structure (31) are determined; and corrected 3D printing data (38) are generated by means of these determined first and further deviations (28, 29).
The invention relates to an assembly and a method for applying particulate building material (2) in a 3D printer, with the objective of reducing forces acting on already applied layers of the particulate building material (2) and partially already hardened regions of the particulate building material (2) with the application of a further layer of the particulate building material (2). This objective is achieved by the assembly in that, in front of the smoothing means (9), when viewed in a moving direction (4) of the smoothing means (9), there is a means for discharging excess particulate building material (2) from an accumulation (10) in front of the smoothing means (9). The objective is achieved by the method in that, in a working step of smoothing the particulate building material (2) applied to a surface of the building field (3) by an applicator (1), with said building material collecting in an accumulation (10) in front of a smoothing means (9), the height H (13) of the accumulation (10) is controlled such that particulate building material (2) is partially removed from the accumulation (10).
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
The invention relates to a method for influencing components or assemblies in a 3D printer (1). The aim of the invention is to provide a solution with which an automatic adjustment or a modified actuation of components or assemblies in a 3D printer (1) is achieved. This is achieved in that control data (8) with parameters, by means of which the production of a 3D structure (10) in a 3D printer (1) is controlled, is generated from input data (9) in a processing step (15), and the 3D structure (10) is produced such that a produced 3D structure (10) is measured, wherein the actual measurements are ascertained and stored as data, a comparison is carried out between the specified input data (9) measurements and the data of the actual measurements, and differences are ascertained. In the event that such a difference is ascertained or such a difference exceeds a specified tolerance threshold, at least one parameter of the control data (8) is modified.
B29C 64/165 - Procédés de fabrication additive utilisant une combinaison de matériaux solides et liquides, p.ex. une poudre avec liaison sélective par liant liquide, catalyseur, inhibiteur ou absorbeur d’énergie
B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B22F 10/14 - Formation d’un corps vert par projection de liant sur un lit de poudre
B22F 10/85 - Acquisition ou traitement des données pour la commande ou la régulation de procédés de fabrication additive
B22F 12/90 - Moyens de commande ou de régulation des opérations, p.ex. caméras ou capteurs
The invention relates to a method for discharging particulate building material in a 3D printer, in which method: the building material curtain (6) consisting of particulate building material (2) is optically monitored in a working step in which the particulate building material (2) is discharged in a region of the building material curtain (6) between the applicator (1) and the construction area (4); an image of the building material curtain (6) is generated and/or at least one dimension of the building material curtain (6) is determined; the image and/or the at least one dimension is compared with an associated reference image and/or a predefined reference value and, if the image deviates from the reference image and/or the dimension deviates from the associated reference value, at least one discharge parameter for discharging the particulate building material (2) is changed.
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
B22F 10/85 - Acquisition ou traitement des données pour la commande ou la régulation de procédés de fabrication additive
B22F 12/90 - Moyens de commande ou de régulation des opérations, p.ex. caméras ou capteurs
B29C 64/165 - Procédés de fabrication additive utilisant une combinaison de matériaux solides et liquides, p.ex. une poudre avec liaison sélective par liant liquide, catalyseur, inhibiteur ou absorbeur d’énergie
The invention, which concerns a method for applying particulate building material (3) in a 3D printer, addresses the problem of providing a solution that permits a more uniform application of the particulate building material (3). This problem is solved by optically monitoring the discharged particulate building material (3) by means of an image-recording device (7) in a working step of smoothing the particulate building material (3) in a region of an accumulation (5) of the particulate building material (3); generating an image of the accumulation (5) and determining at least one dimension of the accumulation (5) from the generated image; comparing the image of the accumulation (5) and/or the at least one determined dimension with an associated reference image and/or a predetermined reference value; and changing at least one application parameter for applying the particulate building material (3) if the image of the accumulation (5) deviates from the reference image and/or if the determined dimension deviates from the associated reference value.
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
The invention, which relates to a method for monitoring a surface profile in a 3D printer, addresses the problem of specifying a solution with which the surface profile of a layer of a particulate construction material on a construction area or of 3D part-structures within a layer of a particulate construction material on the construction area can be sensed simply, rapidly and safely to monitor the quality of the production of a 3D structure, in which method the technical complexity and costs are reduced. This problem is solved in that an optical analysis of the generated image of the surface profile (1) is carried out, and during this analysis it is determined whether 3D part-structures and/or a structure of the particulate construction material (2) applied layer by layer have been produced correctly or incorrectly.
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
B22F 10/80 - Acquisition ou traitement des données
B22F 10/85 - Acquisition ou traitement des données pour la commande ou la régulation de procédés de fabrication additive
B22F 12/90 - Moyens de commande ou de régulation des opérations, p.ex. caméras ou capteurs
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/386 - Acquisition ou traitement de données pour la fabrication additive
B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
The invention, which relates to a method for creating a 3D structure, addresses the problem of specifying a solution with which the layers are built up more reliably and more exactly in a 3D printing method. This object is achieved in that the data of the 3D structure to be created are analysed, during which critical regions within the 3D structure to be created are identified, and in that, if an identified critical region is reached during the creation of the 3D structure, a speed of movement of working means of the 3D printer over the construction area is at least temporarily reduced.
B22F 10/14 - Formation d’un corps vert par projection de liant sur un lit de poudre
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
B22F 10/37 - Commande ou régulation des opérations des caractéristiques du lit de poudre, p.ex. de la densité
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B33Y 50/02 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
8.
METERING UNIT IN A PRINTHEAD OF A 3D PRINTER AND METHOD FOR METERING A FLUID IN A 3D PRINTER
The invention relates to a metering unit (1) in a printhead of a 3D printer and to a method for metering a fluid (5) in a 3D printer. The problem addressed by the invention is that of providing a solution by means of which improved quality and reliability are achieved in the metering of a fluid (5) by means of a metering unit (1). Said problem is solved with respect to the assembly in that a removal channel (8) for removing the fluid (5) from the metering unit (1) in the printhead of the 3D printer is arranged at the metering unit (1) such that the fluid (5) flows through the metering unit (1) and through a fluid exit region (10) outside the nozzle (3). Said problem is solved with respect to the method in that the fluid (5) fed into the metering unit (1) of the 3D printer by means of the feed channel (4) is at least partially led out of the metering unit (1) by means of a removal channel (8), the fluid (5) flowing through the metering unit (1) and through a fluid exit region (10) outside the nozzle (3).
B29C 64/165 - Procédés de fabrication additive utilisant une combinaison de matériaux solides et liquides, p.ex. une poudre avec liaison sélective par liant liquide, catalyseur, inhibiteur ou absorbeur d’énergie
The invention, which concerns an arrangement and a method for generating a layer of a particulate building material in a 3D printer, is based on the problem of providing a solution whereby an increase in the quantity of the material deposited, with the same quality being maintained, and a reduction in the forces acting on the building zone are achieved while the particulate building material is being applied, smoothed and compacted. This problem is solved with respect to the arrangement by having in the arrangement (1) that can be moved over a building zone (5) a first assembly (4a), which has a means (2) for applying the particulate building material (10) onto a building zone (5), and a second assembly (4b), which is arranged spatially at a distance from the first assembly (4a) in the arrangement (1) and has a means (3) for smoothing the particulate building material (10) applied. This problem is solved with respect to the method by providing that, in a first method step, by means of a coater arrangement (1), which is provided over a building zone (5) and can be moved over this building zone (5), the particulate building material (10) is applied on the building zone (5) and that, in a second method step, which follows at a time after the first method step and is independent thereof, a smoothing of the particulate building material (10) applied is performed, wherein the first and second method steps are carried out during a process of moving the coater arrangement (1) over the building zone (5).
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
The invention relates to an assembly and a method for creating a 3D structure, wherein the object of the invention is to provide a solution for an improved compression of a particulate construction material to be applied in layers, as well as for increased speed in the forming of the individual layers. With the assembly, this object is achieved in that a compressor element (2) having a blade with a least one cutting edge is arranged in the compressor assembly (1) for compressing the particulate construction material to be applied in layers, and in that the width of the cutting edge at one end of the cutting edge, which is in contact with particles (11) of a particulate construction material during a compression process, is in a range between 0.1 and 3 times the diameter of a particle of the particulate construction material. With the method, the object is achieved in that the compression of the construction material occurs by means of a compressor element (2) having a blade with a least one cutting edge and arranged in a compressor assembly (1), wherein the width of said cutting edge at one end of the cutting edge, which is in contact with particles (11) of a particulate construction material during a compression process, is in a range between 0.1 and 3 times the diameter of a particle of the particulate material, wherein the compressor element (2) is moved in a linear movement direction (12) by means of a drive element (3).
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B33Y 40/00 - Opérations ou équipements auxiliaires, p.ex. pour la manipulation de matériau
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/188 - Procédés de fabrication additive impliquant des opérations supplémentaires effectuées sur les couches ajoutées, p.ex. lissage, meulage ou contrôle d’épaisseur
brevets
