A pair of thermoplastic workpieces are spin welded by placing one element in a non-rotatable, reciprocable clamp. Another workpiece is press-fit onto the first workpiece and the clamp is shifted toward a continuously rotatable collet having radially inwardly closable jaws. A mandrel extends from the...http://www.google.fr/patents/US4090898?utm_source=gb-gplus-shareBrevet US4090898 - Methods and apparatus for spin welding thermoplastic workpieces
Methods and apparatus for spin welding thermoplastic workpieces
