Method and device for thickening a plastically deformable hollow body wall of a hollow body, in particular in portions, and manufacturing method and machine for producing a hollow body

US11890667B2 · kind B2 · utility

Assignee

• FELSS Systems GmbH · DE

Inventors

• Werner Michi · Heilbronn, DE
• Joerg Wachter · Keltern, DE
• Dennis Beihofer · Kämpfelbach, DE
• Philipp Grupp · Pforzheim, DE
• Michael Marré · Karlsruhe, DE

Key dates

• Filing date: Apr 16, 2021
• Grant date: Feb 6, 2024
• Expiry date: Dec 5, 2041

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B21K21/12
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

In a method for thickening a plastically deformable hollow body wall of a hollow body, with effective radial support of the unthickened hollow body wall on an outer supporting face of an outer mold and with effective radial support of the hollow body wall on an inner supporting face of an inner supporting body, the hollow body is acted on by a compressive force by two application members at application points by moving the application members towards one another in the axial direction with a compressing movement. The application points on the hollow body are distanced from one another in the axial direction. An expansion space of the outer mold is arranged between the application points. Due to the compressing movement of the application members, material of the hollow body wall between the application points is plasticised in the region of the expansion space of the outer mold, and plasticised material of the hollow body wall flows into the expansion space of the outer mold, thus thickening the hollow body wall.