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US 8,710,144 B2Granted
Powder for layerwise manufacturing of objects
AssigneeEOS GmbH Electro Optical Systems
InventorsPeter Hesse, Tillmann Paul, Richard Weiss
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AssigneeEOS GmbH Electro Optical Systems
InventorsPeter Hesse, Tillmann Paul, Richard Weiss
Estimating the term…
The invention describes powders for use in the production of spatial structures, i.e. molded bodies, using layer build-up methods, as well as methods for their efficient production. The powders have the special feature that they have good flow behavior, for one thing, and at the same time, have such a composition that the molded body that can be produced with the powder, using rapid prototyping, has significantly improved mechanical and/or thermal properties. According to a particularly advantageous embodiment, the powder has a first component that is present in the form of essentially spherical powder particles, which is formed by a matrix material, and at least one further component in the form of stiffening and/or reinforcing fibers, which are preferably embedded in the matrix material.
In solid freeform fabrication of objects using a powder-based generative rapid prototyping or manufacturing process, an improved powder wherein the improvement comprises, the powder having a first fraction that is present in the form of substantially spherical powder particles as a matrix material, and at least one other fraction in the form of strengthening and/or reinforcing fibers, wherein the medium length L50 of the fibers is not greater than the medium grain size d50 of the spherical powder particles and wherein the powder is supplied in an isolated powder form and not in a liquid medium during the freeform fabrication of objects.
In solid freeform fabrication of objects using a powder-based generative rapid prototyping or manufacturing process, an improved powder wherein the improvement comprises, the powder having a first fraction that is present in the form of substantially spherical powder particles as a matrix material, and at least one other fraction in the form of strengthening and/or reinforcing fibers, wherein the medium grain size d50 of the spherical powder particles is in the range from 20 to 150 μm, and wherein the medium length L50 of the fibers is not greater than the medium grain size d50 of the spherical powder and wherein the powder is supplied in an isolated powder form and not in a liquid medium during the freeform fabrication of objects.
Dependencies are inferred from the claim text.