Patent DE-102011014610-B3 (DE)
Title: Device for applying powder for additive fabrication process, comprises a platform lowered with a drive for a component, and a wall region of the powder reservoir movable with the device, where an area of the bottom is movable
Inventor: EXNER HORST PROF
IPC: B05C19/00
Filed: 2011-03-19
Granted: 2012-05-03
Abstract: The device comprises a platform (3) lowered with a drive for a component, and a partially closable powder reservoir via an opening (2) in direction of a radiation for ordering and compacting the powder in which the platform is lowerable, and a wall region of the powder reservoir movable with the device, where an installation space (9) constructively flows into a powder reservoir (1) in which the platform is positioned during an impact with a radiation so that the platform with the component is completely lowered with the drive into the powder reservoir. The device comprises a platform (3) lowered with a drive for a component, a partially closable powder reservoir via an opening (2) in a direction of the radiation for ordering and compacting the powder in which the platform is lowerable, and a wall region of the powder reservoir movable with the device, where an installation space (9) constructively flows into a powder reservoir (1) in which the platform is positioned during an impact with a radiation so that the platform with the component is completely lowered with the drive into the powder reservoir. An area of the bottom is movable as the movable wall region independent of the platform in direction of a cover area, where the wall region of the powder reservoir consists of a deformable material and is coupled to the wall region of the device so that the wall region is deformable and movable by the device, or the area of the bottom and the wall region containing the deformable material are movable by the device so that the lowered platform and the wall region of the powder are movable into a hollow space formed by lowering the platform in the closed powder reservoir and are partially reached/condensable to a component. The device for moving the wall region comprises a movable member or fluid, and the device is formed so that the member or the fluid of the wall region deforms in a pulsating or peristaltic manner. The wall region of a double wall is provided with a liquid medium between the wall regions of the double wall. The cover area of the powder reservoir is formed in a dome- or pyramid-shaped manner. A cover (10) coupled to a drive mechanism is arranged on the powder reservoir and/or the installation space into the powder reservoir for the opening of a powder layer to be acted upon with the radiation. The cover: consists of a transparent material for the radiation; and is coupled to the drive mechanism for moving the cover on the opening of the powder reservoir and/or the installation space so that after processing the powder reservoir and/or the installation space is closed with an other area of the cover. A movable partition wall is arranged in the powder reservoir so that the installation space is separable from the powder reservoir. The movable wall region or the cover of the powder reservoir is coupled with an arbitrary motion generating device for homogenizing and condensation through coordinated plugging, stamping and pressing movement. A unit of a drive system is arranged into the opening of the powder reservoir placeable and removable from the opening of an additional piston for homogenizing an upper zone of a powder bed. The drive system is a vibration and/or rotation generating drive system for the additional piston.