Patent ID: 8992816
Filing Date: 2015-03-31
Classification: B22F,B29C,B29L,B33Y,Y02P

Abstract:
1. A method for producing a three-dimensional object layer by layer using a powdery material which can be solidified by irradiating the powdery material with a beam of charged particles, which method comprises the following steps: applying successive powder layers of the powdery material to a working area; fusing together successive layers of said three-dimensional object by successively irradiating at least a part of the working area where the powdery layers are applied with said beam; detecting lifting of at least a portion of the powdery material from the working area, said detecting being via a powder-lifting detection device configured for generating a detection signal upon the detection of the lifting of said at least a portion of the powdery material from the working area; and based upon the detection of said lifting and upon the generated detection signal, automatically interrupting the irradiation of at least a part of the working area where the powder lifting occurs.