Method for producing a foam body having an internal structure

US10946569B2 · kind B2 · utility

Assignee

• Covestro Deutschiand AG · DE

Inventors

• Dirk Achten · Leverkusen, DE
• Rebecca Alina Heil · Düsseldorf, DE
• Rolf Albach · Recklinghausen, DE
• Michael Ehlers · Krefeld, DE
• Dorothee Clasen · Cologne, DE
• Sascha Praet · Cologne, DE
• Adam Pajonk · Munster, DE

Key dates

• Filing date: Apr 21, 2017
• Grant date: Mar 16, 2021
• Expiry date: May 10, 2037

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/249958
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A method for producing a foam body (10) having an internal structure (100, 200, 300), comprising the steps: I) selecting an internal structure (100, 200, 300) to be formed in the foam body (10), the structure comprising a first polymer material; II) providing a foam body (10), the foam body (10) comprising a second polymer material which is different to the first polymer material; III) injecting, by means of an injection means (20), a predefined amount of a melt of the first polymer material or a predefined amount of a reaction mixture (30, 31, 32) which reacts to form the first polymer material at a predefined location inside the foam body (10), corresponding to a volume element of the internal structure (100, 200, 300); IV) repeating step III) for further predefined locations inside the foam body (10), corresponding to further volume elements of the internal structure (10), until the internal structure (10) is formed. The invention also relates to a foam body (10) which has an internal structure (100, 200, 300) and is obtainable by the method according to the invention.