Three-dimensional printing
US11117318B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2017 |
| Grant date | Sep 14, 2021 |
| Priority date | — |
| Expiry date | Nov 30, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/0017
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In an example of a method for 3D printing, a polymeric or polymeric composite build material is applied. Some of the build material is negatively patterned to define a removable build material portion and a remaining build material portion. The negatively patterning includes selectively applying an anti-coalescing polymer solution including a polymer having a pendant reactive functional group, and selectively applying an anti-coalescing crosslinker solution including a multifunctional crosslinker. The pendant reactive functional group and the multifunctional crosslinker react to form an insoluble gel network among the polymeric or polymeric composite build material in the removable build material portion. Based on a 3D object model, a layer of a final 3D object is formed from at least some of the remaining build material portion. The some of the polymeric or polymeric composite build material in the removable build material portion remains physically separated from the layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.