| 摘要 |
The invention relates to a device for producing molded bodies by layerwise construction from a powder, especially metallic or ceramic material. Said device comprises a process chamber housing, a protective gas feed and discharge system for producing and maintaining a protective atmosphere, especially an argon atmosphere inside the process chamber, a support for the layer construct, an irradiation device for irradiating the material powder layer prepared on the support in a cross-sectional area of the model of the molded body associated with said layer with radiation, especially a focused laser radiation which causes the material powder to melt or optionally sinter in this cross-sectional area under the effect of heat, and a powder layer preparation device for preparing the respective subsequent material powder layer on the layer last irradiated or applied. The inventive device is characterized by at least one lock chamber (45), adjacent to the process chamber (5) and to an area surrounding it and separated therefrom, which chamber comprises doors (47, 53), which can optionally be closed and opened, to the process chamber (105) and a surrounding area. Said lock chamber (45) is connected to a protective gas feed and discharge device (55, 59) so that a protective atmosphere can be produced inside the lock chamber, as required. |
