ELECTRIC FUSION WELDING OF THERMOPLASTIC MATERIALS

摘要

Thermoplastic members are welded together using a welding rod formed of a core (10) of said thermoplastic around which is wrapped in an electrical resistance element (11). The welding rod is positioned between members (12, 13) of the thermoplastic to be welded and electric current is applied to the electric resistance element while pressing the members (12, 13) and the core together to embed the electric resistance element in the thermoplastic causing the plastic to fuse and form a unitary weld. Simultaneously the electrical resistance element (11) is embedded in the weld, mechanically reinforcing and strengthening the connection.