Spin welding, also referred to as rotary friction welding, is the joining technology of choice when assembling spherically or cylindrically shaped thermoplastic parts.
In spin welding, one part, which has a circular cross section at the weld interface, is rapidly spun against its mating part which is held stationary in a nest fixture.
The resulting heat that is generated by the combination of spinning action and friction brings the plastic material to its melt point and fuses the two parts together, producing a strong and impervious seal.
Hermetic seals are also attainable depending upon the materials used and the weld joint configuration. While spin welding works with all thermoplastics, and can accommodate virtually any diameter part, it is particularly suited for crystalline resins such as polyethylene and polypropylene.