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: A flow device for an additive manufacturing device (1) for the production of a three-dimensional object (2) by layer-wise selective solidification of a building material in a build area (10) comprises: a process chamber (3), a gas supply device for generating a gas stream in the additive manufacturing device (1), at least one gas inlet (32, 43, 132, 232) for introducing the gas stream into the process chamber (3) and at least one gas outlet (34, 45) for directing the gas stream out of the process chamber (3), and a gas supply line (30), which is provided outside the process chamber (3), in order to conduct gas to the at least one gas inlet (32, 43, 132, 232), the gas supply line (30) comprising at least a first line section (31, 41) which adjoins the gas inlet (32, 43, 132, 232) and which extends a length (L) along a first extension direction of the gas supply line (30), the first extension direction being substantially straight, and wherein the first line section (31, 41) extends a maximum value of a width (

Abstract: A flow device serves for a device (1) for producing a three-dimensional object (2) by a layer-wise selective solidification of a building material (15) at locations corresponding to the cross-section of the object (2) to be produced in the respective layer by irradiation by means of an energetic radiation (22, 22?), the device comprising a gas conveying device for generating a gas stream (50, 51, 52, 53, 54, 55) and a process chamber (3) with a build area (8) for building the object (2). The process chamber (3) comprises at least a first gas inlet (31, 32) for introducing a gas stream into the process chamber (3), and a first gas outlet (34) and a second gas outlet (33) spaced from the first gas outlet (34) for discharging a gas stream from the process chamber (3).