Method for producing 3D objects

US10806208B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Thomas Büsgen · Leverkusen, DE
• Dirk Achten · Leverkusen, DE
• Nicolas Degiorgio · Krefeld, DE
• Roland Wagner · Feldkirchen-Westerham, DE
• Thomas Michaelis · Leverkusen, DE
• Maria Elisabeth Beenen-Fuchs · Cologne, DE

Key dates

• Filing date: Apr 21, 2016
• Grant date: Oct 20, 2020
• Expiry date: Mar 28, 2037

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29K2075/00
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a method for producing a three-dimensional object, the outer surface of which has at least one surface section that is generated in that, by means of an additive production method (layer-building forming method), initially a surface section is produced on a flat base plate (5) in two-dimensional form, comprising the following steps: I) applying at least one curable polymer or curable reaction resin with a respective elastic modulus according to DIN 53504 (effective: 18 Apr. 2015) in the cured state, of <250 MPa in fluid form, as material webs onto a flat base plate (5) by means of a layer-building forming method in order to produce a first layer (6); II) applying a second layer (7) onto the first layer (6) by means of the same or another layer-building forming method, like in step I); III) optionally applying between 1 and 48 additional layers according to step II), wherein each new layer is applied onto the respective previous layer; IV) curing the layers; V) releasing the cured surface section from the flat base plate (5); VI) forming the cured surface section into a three-dimensional object; and VII) securing the three-dimensional object.