Slm Solutions Group Ag

Nikon Slm Solutions Ag

Naveed Iqbal

Andreas Wiesner

Jan Wilkes

Dieter Schwarze

Toni Adam Krol

Christiane Thiel

Lukas Roesgen

Eduard Gieser

Karsten Huebinger

Isabell Huebinger

Christopher Stengel

Birk Hoppe

Arne Neef

Daniel Brück

Simon Steven

Felix Mutz

Zhuo Peng

Hendrik Jargstorf

Torsten Kuntoff

Kevin Kondziella

Meike Husmann

Bärbel Kratz

Maximilian Schniedenharn

Simon Mueller

Isabell HÜBINGER

The application relates to a device for producing three-dimensional workpieces, the device including: a structural surface designed to receive a molding compound; and an irradiation arrangement designed to selectively irradiate the molding compound on the structural surface with electromagnetic radiation, in order to produce a workpiece by means of generative layer construction, where the irradiation device comprises a plurality of irradiation units, the irradiation units being designed to irradiate an individual region of the structural surface respectively associated with the irradiation units, and where the beams emitted by the irradiation units respectively have a cross-sectional surface corresponding to between approx. 2% and approx. 170% of the surface of the respectively associated individual region. The application also relates to the use of such a device and to a method for producing three-dimensional workpieces by means of such a device.

Production of three-dimensional workpieces by means of a plurality of irradiation units

A process chamber housing for an additive manufacturing apparatus comprising a process chamber with a bottom, a ceiling, and sidewalls jointly enclosing a volume of the process chamber, with a gas inlet in a front wall and a gas outlet in a rear wall of the sidewalls. The gas inlet and outlet are positioned at opposite sides of an opening in the bottom and face each other, which allows for an improved removal of smoke out of the process chamber if the gas inlet has a width w, the opening has a width w, and the gas outlet has a width w, such that at least one of the relations (i) w&#x2265;w&#xb1;4 cm and w&#x2265;w&#xb1;4 cm; (ii) w&#x2265;wand/or w&#x2265;w; and (iii) w&#x2265;w+1 cm and/or w&#x2265;w+1 cm is satisfied.

Additive manufacturing apparatus and method for operating the apparatus

An apparatus including a process chamber accommodating a carrier for receiving a raw material powder. An irradiation device of the apparatus is configured to selectively irradiate electromagnetic or particle radiation onto the raw material powder on the carrier in order to produce a work piece by an additive layer construction method, wherein a transmission element allows the transmission of the electromagnetic or particle radiation into the process chamber. The apparatus further includes a gas inlet and a gas outlet for supplying and discharging gas to and from the process chamber which are configured to generate a protective gas stream for protecting the transmission element from being contaminated by impurities present in the process chamber. The gas inlet includes a gas permeable, porous component forming a gas inlet area.

Apparatus for producing a three-dimensional work piece with improved gas flow

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Luebeck, Germany

Naveed Iqbal