Manufacturing a three-dimensional object layer by layer

US9919476B2 · kind B2 · utility

Assignee

• EOS GmbH Electro Optical Systems · DE

Inventors

• Stefan Paternoster · Andechs, DE
• Jochen Philippi · Munich, DE

Key dates

• Filing date: Jun 27, 2013
• Grant date: Mar 20, 2018
• Expiry date: Jun 27, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31728
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A method for manufacturing a three-dimensional object layer by layer by applying and selectively solidifying a constituent material in powder form layer by layer by supply of energy has the steps: applying a layer (32+33) of the powdery constituent material (11) having a pre-determined height (h) onto a support (6) or a previously at least selectively solidified layer of the constituent material, and supplying energy (14) from an energy source (13) into the applied layer at positions corresponding to the cross sectional area of the object to be manufactured for selectively solidifying the constituent material. The step of applying the layer having the pre-determined height (h) is subdivided into a step of applying a first partial powder layer (32) having a first height (h1) which is smaller than the pre-determined height (h), and a step of at least applying a second partial powder layer (33) having a second height (h2) which is smaller than the pre-determined height (h), wherein the total height. (h1+112+ etc.) of the applied partial powder layers (32, 33, etc.) corresponds to the pre-determined height (h), and between the step of applying the first partial powder layer and the ste…