Coating apparatus for application of a layer of powdered build material in an apparatus for layered production of a three-dimensional object

摘要

The coating device (27) for applying a layer of a powdered constituent in a device for producing three dimensional objects by layer-wise hardening of constituent at the places corresponding to the object, comprises a coating element (61) that applies the constituent in form of a layer, and a drive mechanism (59) having a pneumatic system (69), a liquid-brake cylinder that works against the movement of the coating element and oil brake cylinder. The coating element moves via a working level. The pneumatic system moves the coating element by the admission of pressure. The coating device (27) for applying a layer of a powdered constituent in a device for producing three dimensional objects by layer-wise hardening of constituent at the places corresponding to the object, comprises a coating element (61) that applies the constituent in form of a layer, and a drive mechanism (59) having a pneumatic system (69), a liquid-brake cylinder that works against the movement of the coating element and oil brake cylinder. The coating element moves via a working level. The pneumatic system moves the coating element by the admission of pressure. The coating element is formed as blade, whose side turned to the working field applies the constituent on a carrier device. The drive mechanism has a drive shaft and the pneumatic system moves the drive shaft in rotational manner. The rotation of the drive shaft moves the coating element parallel to the working level on a circular path.