Spin welding
From Plastics Wiki, free encyclopedia
Spin welding Bonds two cylindrical plastic parts together by frictional heat. This method is well suited for joining thermoformed container halves. Injection molded cylindrical parts, etc. Because the actual bond is made through heating and then fusing the mating surfaces, only thermoplastics can be joined by spin welding.
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Process
Friction between the parts results in heating their ends. After a predetermined time the rotation stops and the molten regions of the work pieces are fused together under an axial pressure applied until the joint is cooled down. Spin Welding is similar to Friction Welding (FRW).
Applications
Spin Welding is used for manufacturing aerosol bottles, floats and other circular parts.
Advantages
- Reproducibility;
- Large parts may be welded;
- High quality weld;
- Oxidizing polymers may be welded.
Disadvantages
- At least one of the parts to be welded should have a circular symmetry;
- Minimum rigidity required.
Process: Contact welding • High frequency welding • Hot gas welding • Hot plate welding • Spin welding • Ultrasonic welding • Vibration welding
Equipment: ultrasonic welding machine
See also: Plastic thermoforming • Injection molding • Blow molding • Plastic extrusion • Compression molding • Rotational molding
