Use of core-shell(-shell) particles in the binder jetting process
AssigneeEvonik Roehm GmbH
InventorsThomas HASSKERL, Lukas Friedrich DOESSEL
Life of this patent
Estimating the term…
Abstract
A three-dimensional object is formed by 3D printing, especially by a binder jetting method, in which particulate material in a powder bed is bonded by a printed adhesive. The particulate materials may be inorganic materials, for example sand or a metal powder, or particulate polymeric materials, for example polymethacrylates or polyamides. For this purpose, polymethacrylates may take the form, for example, of suspension polymers, called bead polymers. Powder bed compositions comprising core-(shell)-shell particles can be used for 3D printing, wherein the core-(shell)-shell particles can swell in contact with the binder during the printing operation.
Claims15
A method of producing a three-dimensional object from a powder bed by a binder jetting process, said process comprising:
- repeating multiple times the following
- a) applying a new powder layer on a surface of the powder bed, and
- b) selectively applying a binder and subsequently or simultaneously hardening said binder in the powder bed,
- wherein the powder bed comprises at least two different types of particulate material,
- wherein the first particulate material has a mean diameter between 10 and 500 μm,
- wherein the second particulate material comprises core-shell or core-shell-shell particles having a mean diameter between 100 nm and 1200 nm.
Dependencies are inferred from the claim text.