Method for a layer-wise manufacturing of a three-dimensional object

摘要

A method for a layer-wise manufacturing of a three-dimensional object has a first step of providing a layer of a material in powder form or a liquid material on a support or a layer that has already been solidified at selected positions previously and a second step of directing a focussed photon or particle beam (8′) selectively at selected positions of the layer. In the second step, the photon or particle beam is selected such that it brings about a change of the absorption of the material when hitting the layer. After the termination of the second step, a third step is carried out, in which the layer is irradiated by means of electromagnetic radiation (18′) such that the material is homogenously solidified at those positions of the layer that correspond to the cross-section of the object to be formed.

主权项

1. A method for a layer-wise manufacturing of a three-dimensional object, the method comprising the following steps:
a first step of providing a layer of a material in a powder form onto a support or onto a prior layer; a second step of directing a focussed electromagnetic radiation or a focussed particle beam selectively onto selected positions of the layer; wherein, in the second step, the focussed electromagnetic radiation or particle beam is selected such that it induces a change of the absorption of the material when hitting the layer at the selected positions without complete melting or sintering; and after the second step, carrying out a third step, which is discrete from the second step, of completely melting or sintering the layer at those positions of the layer that correspond to the cross-section of the object to be formed using an electromagnetic radiation that is different from the focussed electromagnetic radiation or particle beam of the second step, wherein the first to third steps are repeatedly carried out until the object is completed, and wherein the solidification in the third step is effected at those selected positions at which the focussed electromagnetic radiation or particle beam had been directed in the second step.