Method and device for producing a three-dimensional object with an improved surface quality
US11045876B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2016 |
| Grant date | Jun 29, 2021 |
| Priority date | — |
| Expiry date | Jan 16, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/25
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An additive manufacturing process includes applying a layer of a building material on a building support or an already applied and selectively solidified layer and selectively solidifying the applied layer by electromagnetic radiation or particle radiation. All positions in the layer that correspond to a cross-section of the object are scanned by electromagnetic radiation or particle radiation such that at these positions the powder is melted at least at its surface. At least one cross-section includes an inner region and a surface region. The step of applying a layer and the step of selectively solidifying the layer are repeated until all cross-sections of the object are solidified. At least a portion of the surface region is scanned at least twice before scanning of the inner region starts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.