Electric fusion welding of thermoplastic materials

Details Electric fusion welding of thermoplastic materials Electric fusion welding of thermoplastic materials

B - Operations, Transporting

29

C

B29C 65/34 (2006.01) B29C 63/24 (2006.01) B29C 65/00 (2006.01) B29C 70/82 (2006.01) B29D 23/00 (2006.01) B29C 65/36 (2006.01)

Patent

CA 2143935

An improved welding rod having a solid homogeneous core of thermoplastic material and a resistance element comprised of a plurality of wires is presented with a method and apparatus for forming the welding rod. The welding rod is positioned be- tween members of the thermoplastic material to be welded and a current and pressure is applied to the resistance element causing the thermoplastic material of the solid core and the adjacent thermoplastic members to fuse and form a unitary weld. Simultane- ously the electrical resistance element is embedded in the weld, mechanically reinforcing and strengthening the connection. There is also disclosed a method for electric fusion welding of thermoplastic members wherein the welding rod is pre-attached to one of the thermoplastic members.

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