- Titel
- Analysis of material degradation and its effect on weld seam strength during serial hot gas welding
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:ch1-qucosa2-953024
- Konferenz
- 77th IIW Annual assembly and International Conference on Welding and Joining 2024. Rhodes, Greece, 07 - 12.July 2024
- Erstveröffentlichung
- 2024
- DOI
- https://doi.org/10.60687/2025-0006
- Abstract (EN)
- In order to achieve short cycle times, gas temperatures of 500 °C or higher are used for welding plastics by means of serial hot gas welding. These temperatures are often distinctly higher than the decomposition temperature of the plastic to be joined. The thermal stresses can lead to chemical degradation and physical aging. This can negatively affect the lifetime of the weld and lead to premature failure. In this study, the fusion layers of polypropylene and polyamide are analyzed in terms of their thermal and thermal oxidative degradation using viscometry and FTIR spectroscopy. The results show that a detection of chain degradation and degradation products in the individual melt layer depths is possible. Furthermore, correlations between the depth of degradation and the weld strength can be identified. This characterization shows the first results of a holistic approach to the influence of thermal degradation in the weld seam as a function of the process parameters and their effects on weld seam properties. With the right joining strategy, it is possible to achieve high weld strength without the use of nitrogen and the associated material degradation. This could result in a significant cost reduction for the industry.
- Freie Schlagwörter (DE)
- Schweißen , Warmgas , Heißgas , Kunststoff , Fügen , Kunststofffügen , Materialschädigung
- Freie Schlagwörter (EN)
- Welding , Hot gas , Plastic , Joining , Plastic joining , Material damage
- Klassifikation (DDC)
- 620
- Normschlagwörter (GND)
- Schweißen , Fügen , Kunststoff
- Herausgeber (Institution)
- Technische Universität Chemnitz, Chemnitz
- Version / Begutachtungsstatus
- publizierte Version / Verlagsversion
- URN Qucosa
- urn:nbn:de:bsz:ch1-qucosa2-953024
- Veröffentlichungsdatum Qucosa
- 28.01.2025
- Dokumenttyp
- Konferenzbeitrag
- Sprache des Dokumentes
- Englisch
- Lizenz / Rechtehinweis
