Patent ID: 9713856
Date: 2017-07-25
CPC Classifications: B22F,B23K,B29C,Y02P

Claim:
1. Method for producing a moulded body by building up layers of powdered material, comprising the steps of: a) preparing a layer ( b) heating the layer ( c) preparing a next layer of powdered material ( d) heating the most recently prepared layer ( e) repeating steps c) and d), wherein an energy application to the irradiated selected points in step d) is varied per unit of time by a means of radiation according to a respective irradiation point on the most recently prepared layer ( wherein the energy application per unit of time to the respective irradiation point in step d) is selected as a function of a thermal conductivity of a respective defined, immediate, three-dimensional surrounding region ( wherein the irradiation parameters include an energy density of the radiation at the respective irradiation point, a duration of the irradiation at the respective irradiation point, or a combination thereof, wherein the thermal conductivity of the defined, immediate, three-dimensional surrounding region of the respective irradiation point is measured by determining a volume of material already solidified by melting powdered material within the defined, immediate, three-dimensional surrounding region based on the geometry description data of the moulded body, and wherein the energy application per unit of time to the respective irradiation point is selected to be greater as the thermal conductivity of the defined, immediate, three-dimensional surrounding region increases beyond a tolerance range.