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US Patent 9931789 Method and apparatus for producing a large three-dimensional work piece

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Is a
Patent
Patent

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
9931789
Patent Inventor Names
Dieter Schwarze0
Andreas Wiesner0
Henner Schoeneborn0
Date of Patent
April 3, 2018
Patent Application Number
14515259
Date Filed
October 15, 2014
Patent Citations Received
‌
US Patent 11759861 Additive manufacturing build units with process gas inertization systems
‌
US Patent 11938539 Additive manufacturing build units with process gas inertization systems
0
‌
US Patent 11872758 Multi-functional ingester system for additive manufacturing
0
Patent Primary Examiner
‌
Ryan Ochylski
Patent abstract

Method and apparatus for producing a large three-dimensional work piece. In a method for producing a three-dimensional work piece, a layer of raw material powder is applied onto a carrier (16) accommodated within a process chamber (12) by means of a powder application device (14), wherein a plurality of irradiation areas (18a, 18b, 18c, 18d) is defined on a surface of the carrier (16). Electromagnetic or particle radiation is selectively irradiated onto the raw material powder applied onto the carrier (16) by means of an irradiation system (20), the irradiation system (20) comprising a plurality of irradiation units (22), each irradiation unit (22) being associated with one of the irradiation areas (18a, 18b, 18c, 18d) defined on the surface of the carrier (16) and being configured to selectively irradiate electromagnetic or particle radiation onto the raw material powder applied onto the associated irradiation area (18a, 18b, 18c, 18d). Fresh gas is supplied to the process chamber (12) by means of a gas inlet system (30), and gas containing particulate impurities is discharged from the process chamber (12) by means of a gas outlet system (32) such that a gas flow pattern is generated within the process chamber, the gas flow pattern being configured such that each irradiation area (18a, 18b, 18c, 18d) defined on the surface of the carrier (16) is overflown with fresh gas which is supplied to the process chamber (12) via the gas inlet system (30) and which, after having overflown the irradiation area (18a, 18b, 18c, 18d), is discharged from the process chamber (12) as gas containing particulate impurities via the gas outlet system (32).

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