Apparatus for producing work pieces under elevated pressure

摘要: An apparatus (10) for producing three-dimensional work pieces, the comprises a process chamber (12) accommodating carrier (16) and powder application device (14) applying raw material onto (16), an irradiation (18) selectively irradiating electromagnetic or particle radiation applied in order to produce piece made of said by additive layer construction method. The is sealable against ambient atmosphere, adapted be held under elevated pressure which higher than pressure, provided with first gas passageway (38) supplying from source (40) second (42) discharging present within prior (12). (38, 42) are positioned dependence on ratio between specific density supplied such that flown through having disposed below lower density.