The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 23, 2020
Filed:
Sep. 11, 2017
Evonik Röhm Gmbh, Darmstadt, DE;
Stephan Wieber, Karlsruhe, DE;
Dirk Poppe, Frankfurt am Main, DE;
Stefan Bernhardt, Offenbach, DE;
Markus Pridöhl, Grosskrotzenburg, DE;
Sven Balk, Frankfurt, DE;
Christian Meier, Darmstadt, DE;
Senada Schaack, Frankfurt am Main, DE;
Thomas Hasskerl, Kronberg, DE;
Evonik Operations GmbH, Essen, DE;
Abstract
The present invention relates to the technical field of 3D printing, especially in the form of the binder jetting method, in which particulate material in a powder bed is bonded by means of a printed adhesive to form a three-dimensional object. 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. The present invention relates to the use of porous particles in the binder jetting process, in particular of porous suspension polymers. These powders for 3-D printing differ from the prior art in that the porosity results in a faster and better absorption of the printed binder by the powder particles. A great advantage of this procedure is additionally that a product with less warpage is formed and that the end product has a better surface appearance.