Method of forming a helix, permanent mold for forming a helix, and helix

US12115577B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Franz-Josef Wöstmann · Bremen, DE
• Michael Heuser · Lake Forest, US
• Matthias Busse · Bremen, DE

Key dates

• Filing date: Sep 19, 2019
• Grant date: Oct 15, 2024
• Expiry date: Mar 5, 2041

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02K2213/03
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method for producing a helix includes a step of providing a permanent mold with mold halves which are joined together on a mold parting line. The method additionally has a step of joining together the mold halves of the permanent mold such that the permanent mold has a cavity, which defines the shape of the helix or the shape of a bent-up helix, when the permanent mold is joined together, wherein the helix or the bent-up helix has a flattened profiled winding cross-section which has two opposite flat sides, an outer side and an inner side opposite the outer side, and the mold parting line runs at least partly along the outer side and/or the inner side and/or edges of the profiled winding cross-section.