Device for the Production of Closed Semi-Finished Profiles Using a Soft Magnet-Polymer Composite Impeders

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This patent discloses a device for producing closed tubular or profile semi-finished products using inductive longitudinal seam welding. The core innovation lies in the use of a soft magnet-polymer composite as the impeder core, replacing traditional ceramic ferrite materials. Instead of a full protective shell, only a localized, typically ceramic, protection is provided at critical points, allowing the impeder core to be larger and more efficient. Additional features include adaptable cooling and modular design of the impeder for better process efficiency and economics.

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• Manufacturing of steel, aluminum, or copper pipes and closed profiles for construction and infrastructure applications
• Production of welded tubular products for automotive, oil & gas, and energy industries
• Fabrication of high-strength, thin-walled metal tubes for industrial machinery
• Mass production lines for profile-welded components in HVAC and appliance industries

BenefitsContent extracted from patent full text and abstract with AI.

• Higher welding speeds, increasing manufacturing throughput and reducing downtime
• Greater energy efficiency, lowering production costs and improving environmental footprint
• Enhanced seam quality and mechanical properties of the welded products
• Longer service life and reduced maintenance due to improved impeder materials and localized protection
• Simpler and cheaper manufacturing of the impeder tool thanks to flexible shaping and reduced material usage for protection
• Ability to handle a wider range of tube sizes and shapes, including small and medium diameters
• Reduced overheating and thermal damage risk during welding due to better cooling and material selection

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Patent Abstract

Die Erfindung betrifft eine Vorrichtung zur Fertigung von geschlossenen Profilhalbzeugen mittels induktivem Längsnahtschweißen, aufweisend einen Impederkern und einen Induktor, der in ein Profilhalbzeug einführbar ist und wobei der Induktor das Profilhalbzeug zumindest bereichsweise während dem Fügeprozess umhüllt und eine Fügezone am Profilhalbzeug bildet, wobei der Impederkern aus einem Weichmagnet-Polymer-Komposit besteht und keine, den Impederkern umhüllende Schutzhülle aufweist, wobei zumindest auf der in Richtung der Fügezone weisenden Seite des Impederkerns eine Schutzkomponente angeordnet ist.