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1. Welding basics
1.1 Interface phenomena. Elements of physics
Welding is a technique for joining materials by fusion, involving a process of adhesion by molecular interdiffusion.
According to theory, the process of welding two polymers can be broken down into five stages:
fusion of surfaces to be welded ;
approaching and contacting the two surfaces ;
surface "wetting";
macromolecule diffusion and entanglement ;
solidification of melts.
On contact with the heating element, the material is brought into a "softened" state.
The appearance of...
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Welding basics
Welding processes
Bibliography
Standards and guidelines
DVS Verlag
- Calculation of thermoplastic tanks and apparatus. Welded joints (1975) - DVS 2205-3 -
- Welding of thermoplastics ; extrusion welding for panels and pipes (1993) - DVS 2207-4 -
- Faults in welded joints in Thermoplastics (1998) - DVS 2202-2 -
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Resource centers
Pôle de plasturgie de l'Est http://www.ppe.asso.fr
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TWI (The Weldind Institute) http://www.twi.co.uk
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