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

US11007564B2 · 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: Jan 3, 2018
• Grant date: May 18, 2021
• Expiry date: Dec 25, 2038

Classification

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

Abstract

A method for thickening a plastically deformable hollow body wall of a hollow body includes the steps of arranging the hollow body in an outer mold, arranging an inner supporting body inside the hollow body, applying a compressive force to the hollow body wall by means of two application members moving towards one another in an axial direction with a continuous compressing movement, and performing an axial relative movement of the application members performing the continuous compressing movement on the one hand and of the outer mold on the other hand. Due to the compressing movement of the application members, material of the hollow body wall is plasticized and flows into an expansion space of the outer mold, an axial extent of the expansion space increasing due to the axial relative movement of the application members performing the continuous compressing movement and of the outer mold.