Back to results
US 12,139,625 B2Granted
Selective superparamagnetic sintering and an ink suitable therefor
AssigneeEvonik Operations GmbH
InventorsOdo Wunnicke, Susanne Leuchs, Tim Hupfeld, Michael Holthausen, Vanessa Vennemann, Dominik Mispelkamp, Maximilian Cornelius, Helmut Mack, Bodo Frings, Thomas Große-Puppendahl, Sylvia Monsheimer, Frank Heindl
Life of this patent
Estimating the term…
Abstract
Methods can be used for producing three-dimensional objects by powder bed fusion, using inks containing superparamagnetic particles and solvents. Sintering is performed by a magnetic field having a frequency of 50 kHz to 5 GHz.
Claims21
A method, comprising:
- fusing a powder bed with an ink,
- wherein the ink comprises:
- superparamagnetic particles, and
- at least one solvent, and
- wherein the powder bed comprises a polymer powder selected from the group consisting of polyamides, polyimides, polyolefins, polyesters, and polyaryl ether ketones.
2 more elements
A method for producing a three-dimensional object by powder bed fusion, the method comprising:
- a. providing a powder in a layer thickness of 30 to 200 μm,
- b. applying an ink by an inkjet method to sites in the powder that are to be sintered,
- c. applying an additional amount of the powder,
- d. repeating b and c, to obtain a layered arrangement, and
- e. selectively sintering the layered arrangement with a magnetic field having a frequency of 50 kHz-5 GHz,
- wherein the ink comprises superparamagnetic particles and at least one solvent, and
- wherein the powder comprises a polymer powder selected from the group consisting of polyamides, polyimides, polyolefins, polyesters, and polyaryl ether ketones.
4 more elements
Dependencies are inferred from the claim text.