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Analysis of the Heating Behavior and the Strength of Hot Gas Welded Polyamides with 3D Contours Using an Immersing Nozzle System

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Lectures Notes on Advanced Structured Materials 2

Part of the book series: Advanced Structured Materials ((STRUCTMAT,volume 203))

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Abstract

With the help of computational fluid dynamics (CFD) simulations a nozzle system (top nozzle system) for hot gas welding, which encloses the weld seam during heating, was developed. The significantly more controlled flow behavior of the hot gas improves the processing window, increases the reproducibility and achieves a more efficient heating of the polymer weld seam with inclination angles up to 60°. The heating behavior and weld strength are investigated on three types of plate specimens with varying inclination angles. The investigations are carried out on a series-production hot gas welding system with PA6-GF30 and a PA66-GF35. Stainless steel additive manufactured top nozzle systems for 0°, 15°, 30°, 45° and 60° inclination angles are tested. With the optimized top nozzle system, weld seams with inclination angles of up to 60° can be reproducibly joined thanks to the wide processing window without a significant reduction of the component strength.

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Acknowledgements

In a joint research project from 2019 to 2021 between GMB Kunststoffteile GmbH and Esslingen University of Applied Sciences (Polymer Technologies Department) on hot gas welding (funded by the “Zentrale Innovationsprogramm Mittelstand (ZIM)” from the Federal Ministry for Economic Affairs and Energy—funding code: ZF4166303FH8), the investigated nozzle system—the top nozzle—has been invented and protected [37]. In a further joint research project between GMB Kunststoffteile GmbH, robomotion GmbH, Chemnitz University of Technology (Department of Lightweight Structures and Polymer Technology) and Esslingen University of Applied Sciences (Polymer Technologies Department) on hot gas welding (funded by the “Zentrale Innovationsprogramm Mittelstand (ZIM)” from the Federal Ministry for Economic Affairs and Energy—funding code: KK5052604WO0), the top nozzle system was further developed with the help of CFD simulations for 3D weld contours. The top nozzles for welding geometries with inclination angles of up to 60° were additively manufactured by the Department of Lightweight Structures and Polymer Technology from Chemnitz University of Technology. We also would like to thank Dr.-Ing. Andreas Müller of Celanese for his support in the selection of suitable materials and for making the materials available to us.

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Authors and Affiliations

  1. Polymer Technologies, Faculty of Mechanical and Systems Engineering, Esslingen University of Applied Sciences, Kanalstraße 33, 73728, Esslingen, Germany

    Johannes Schmid, Simon J. Heienbrock, Dennis Mayer, Dennis F. Weißer & Matthias H. Deckert

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  1. Johannes Schmid
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  2. Simon J. Heienbrock
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  3. Dennis Mayer
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  4. Dennis F. Weißer
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  5. Matthias H. Deckert
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Corresponding author

Correspondence to Johannes Schmid .

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Editors and Affiliations

  1. Institute of Mechanics, Otto-von-Guericke-Universität Magdeburg, Magdeburg, Germany

    Holm Altenbach

  2. Department of Materials Engineering, Technische Universität München, Munich, Bayern, Germany

    Leonhard Hitzler

  3. Institut für Mechanik, Universität der Bundeswehr München, Neubiberg, Germany

    Michael Johlitz

  4. Institute for Virtual Product Development, Aalen University of Applied Sciences, Aalen, Baden-Württemberg, Germany

    Markus Merkel

  5. Faculty of Mechanical and Systems Engineering, Esslingen University of Applied Sciences, Esslingen am Neckar, Baden-Württemberg, Germany

    Andreas Öchsner

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Schmid, J., Heienbrock, S.J., Mayer, D., Weißer, D.F., Deckert, M.H. (2024). Analysis of the Heating Behavior and the Strength of Hot Gas Welded Polyamides with 3D Contours Using an Immersing Nozzle System. In: Altenbach, H., Hitzler, L., Johlitz, M., Merkel, M., Öchsner, A. (eds) Lectures Notes on Advanced Structured Materials 2. Advanced Structured Materials, vol 203. Springer, Cham. https://doi.org/10.1007/978-3-031-49043-9_14

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