| CPC B29C 64/386 (2017.08) [B22F 10/366 (2021.01); B22F 10/80 (2021.01); B29C 64/295 (2017.08); B29C 64/393 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 50/02 (2014.12); G05B 19/4155 (2013.01); B22F 10/28 (2021.01); B22F 10/364 (2021.01); B22F 12/10 (2021.01); B29C 64/153 (2017.08); G05B 2219/49031 (2013.01)] | 13 Claims |
|
1. An additive manufacturing method for manufacturing one or more three-dimensional objects in a single build operation by applying a building material containing plastic in a layer by layer manner where the layers correspond to respective cross sections of one or more of the three dimensional objects that are built by solidifying the building material by supplying radiation energy to positions in each layer that are assigned to the respective cross-sections, the method comprising:
providing an energy input unit with at least one beam for inputting energy into the building material in accordance with a set of energy input parameters;
directing the at least one beam to a build surface;
providing a supply of the building material;
providing a recoater device that applies the building material over a build area for at least one of the layers;
accessing computer-based model data of a number of portions of one or more of the three-dimensional objects;
generating a number of data models, each of the data models specifying for at least one of the layers a region to be solidified during the manufacturing of the number of portions,
wherein the region to be solidified is divided into at least a first partial region and at least a second partial region; and
wherein each of the data models specifies a first set of energy input parameters for both the at least first partial region and the at least second partial region, the first set of energy input parameters effecting a solidification scanning that solidifies the building material at positions in the region to be solidified by the energy input unit and each of the data models specifying a second set of energy input parameters for a repetition scanning at positions of the at least second partial region, however not at positions of the at least first partial region;
performing the solidification scanning that solidifies the building material at positions of the at least first partial region and the at least second partial region by the energy input unit, and performing the repetition scanning at the positions of the at least second partial region by the energy input unit, however not at positions of the at least first partial region, wherein the solidification scanning is performed prior to the repetition scanning and without new building material being applied between the solidification scanning and the repetition scanning during manufacturing of the one or more three-dimensional objects;
wherein the second partial region comprises those positions of the region to be solidified that are solidified last in the solidification scanning, or wherein the first partial region comprises a contour of the respective object cross-section and the second partial region comprises an inside of the respective object cross-section located within the contour, or wherein the second partial region comprises a predefined distinguished portion of an object for which a minimum value of a mechanical parameter for a completed object is specified; and
providing the data models as control data in a control data set for manufacturing the one or more three-dimensional objects.
|