The invention relates to an arrangement for the layer-by-layer formation of mouldings from a particulate material, comprising at least one process unit which can be guided to and installed in the arrangement, preferably automatically, and which comprises a printing unit and a coating system with a dynamic filling system; or/and a receiving device for a building container; a preferably automatic feeder for the building container; and an adjustment device for offline preparation of the process unit.

Arrangement and method for generating a layer of a particulate building material in a 3D printer in which a quantity of applied material is increased while keeping the quality constant and forces acting on the construction site during application, smoothing and compacting of the particulate building material is reduced. The arrangement includes: a first assembly having a device for applying the particulate building material to a construction site moveable thereover; a second assembly spatially separate from the first assembly and which has a device for smoothing the applied particulate building material. In terms of the method: in a first step, applying the particulate building material to the construction site with the arrangement above and movable over the construction site; and in a second step, following in time and independent of the first step, smoothing the applied particulate building material, the first and second steps performed in a single movement.

A powder-based additive manufacturing installation (10) comprises a powder layering device (14) that can be displaced along a path linking a start zone (A) and an end zone (B). The layering device (14) comprises powder deposition means (18) for depositing powder in a powder deposition zone (D) situated between the start zone (A) and the end zone (B). The installation comprises a cleaning device (40) situated on the path of the layering device (14). The cleaning device (40) comprises a blowing device (42) configured to blow a gas flow onto at least one surface of the powder deposition means (18).

The present disclosure generally relates to methods for additive manufacturing (AM) for fabricating multi-walled structures. A multi-walled structure includes a first wall having a first surface and a second wall having a second surface facing the first surface to define a passage having a width between the first surface and the second surface in a first direction. The multi-walled structure also includes an enlarged powder removal feature connecting the first wall and the second wall. The enlarged powder removal feature has an inner dimension greater than the width in the first direction and at least one open end in a direction transverse to the first width.

In an example, an apparatus includes an image processing system, a print engine, and a vision system. The image processing system generates electronic signals based on a model of an object to be fabricated using an additive manufacturing process. The print engine performs the additive manufacturing process in a plurality of passes based on the electronic signals. The vision system acquires a plurality of thermal images of the plurality of passes and assigns individual passes to individual images based on data acquired during a build of a calibration object by the additive manufacturing process. The print engine may further include a material coater to spread a powder coating material, a plurality of fluid ejection devices to eject a fusing agent, and an emitter to emit energy to fuse the fusing agent and the powder coating material into a layer of the object to be fabricated.

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.

The invention relates to a method and an apparatus for producing three-dimensional models by layering technology, and a recoater with a vacuum closure.

The invention relates to a method and an apparatus for producing three-dimensional models by layering technology, and a recoater with a vacuum closure.

The invention relates to a method and an apparatus for producing three-dimensional models by layering technology, and a recoater with a vacuum closure.

An apparatus (100) for additive manufacturing of a part of an article from a first material comprising particles having a first composition is provided. The apparatus (100) comprises a layer providing means (110) for providing a first support layer from a second material comprising particles having a second composition, wherein the first composition and the second composition are different. The apparatus (100) comprises a concavity defining means (120) for defining a first concavity in an exposed surface of the first support layer. The apparatus (100) comprises a depositing means (130) for depositing a part of the first material in the first concavity defined in the first support layer. The apparatus (100) comprises a levelling means (140) for selectively levelling the deposited first material in the first concavity. The apparatus (100) comprises a first fusing means (150) for fusing some of the particles of the levelled first material in the first concavity by at least partially melting said particles, thereby forming a first part of the layer of the article. In this way, the second material may be thus used to provide a support structure during additive manufacturing of the part of the article.