Spin welding is a joining process used to fuse thermoplastic parts together by frictional heating. The process involves one part being held stationary while the other is rotated at high speed, generating frictional heat that melts the mating surface of both parts. As the rotating part slows down and eventually stops, the molten material solidifies, creating a strong bond between the parts.

Spin welding is commonly used for joining cylindrical or round parts, such as pipes, tanks, and housings. It is a fast and efficient method for producing hermetic seals and leak-proof joints. Spin welding is also used for joining dissimilar materials, such as plastics and metals.

The process is versatile and can be used with a wide range of thermoplastics, including polyethylene, polypropylene, PVC, ABS, and polycarbonate. The parts being joined must have similar melting temperatures and be able to withstand the rotational forces and heat generated during the process.

The equipment used for spin welding typically consists of a machine with a rotating spindle that holds one part and a fixture or clamp that holds the other part stationary. The spindle is rotated at high speed, usually between 2000 and 10,000 rpm, and the parts are pressed together with a controlled force. The amount of time the parts are held together depends on the materials being joined and the size of the parts.

Overall, spin welding is a highly effective and efficient method for joining thermoplastic parts with high strength and reliability.