Patent ID: 7713454
Filing Date: 2010-05-11
Classification: B22F,B29C,Y02P

Abstract:
1. A method for production of three-dimensional bodies by successive fusing together of selected areas of a powder bed, which parts correspond to successive cross sections of the three-dimensional body, the method comprising: applying a powder layer to a work table, fusing said powder layer by supplying energy from a radiation gun according to an operating scheme determined for the powder layer to said selected area within the powder layer such that the powder in said selected area is fused into a cross section of said three-dimensional body, calculating an energy balance for said selected area by determining whether energy radiated into the selected area is sufficient to maintain a defined working temperature of the selected area; wherein said fusing said powder layer by supplying energy from a radiation gun also includes heating the selected area to the defined working temperature when the calculated energy balance indicates there is insufficient energy to maintain the selected area at said defined working temperature; and where said calculating an energy balance is performed before said fusing.