Apparatus for additively manufacturing three-dimensional objects

A system for additively-manufacturing three-dimensional objects, the system comprising:

• a plurality of apparatuses respectively comprising a process chamber configured to additively manufacture three-dimensional objects by successive layerwise selective irradiation and consolidation of layers of a powdered build material;
• a stream generating unit configured to generate a stream of process gas and to circulate the stream of process gas through a corresponding one of one or more streaming paths, the corresponding one of the one or more streaming paths respectively comprising a process chamber inlet and a process chamber outlet such that the process gas flows through the process chamber of a respective one of the plurality of apparatuses, thereby accumulating and removing charged particles therefrom;
• a filter unit disposed along the corresponding one of the one or more streaming paths, the filter unit configured and arranged such that the process gas having accumulated charged particles flows therethrough, the filter unit thereby separating the charged particles from the process gas;
• one or more particle reception chambers respectively coupled to the filter unit and/or a corresponding further filter unit by one or more particle guides, the one or more particle reception chambers configured and arranged to receive charged particles having been separated from the process gas;
• a passivation unit configured and arranged to supply a passivation material to the one or more particle guides and/or the one or more particle reception chambers;
• and
• a driving unit configured to facilitate movement of the one or more particle reception chambers.