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2. Plastic welding - Wikipedia

   en.wikipedia.org/wiki/Plastic_welding

   A plastic welding rod, also known as a thermoplastic welding rod, is a rod with circular or triangular cross-section used to bind two pieces of plastic together. They are available in a wide range of colors to match the base material's color. Spooled plastic welding rod is known as "spline".

3. Spin welding of polymers - Wikipedia

   en.wikipedia.org/wiki/Spin_welding_of_polymers

   Spin welding is a form of friction welding used to join thermoplastic parts. The parts to be welded must be round, and in plane with each other. Like all other welding methods this process utilizes heat, time, and pressure to create a weld joint.

4. Plastic weld non-destructive examination - Wikipedia

   en.wikipedia.org/wiki/Plastic_weld_non...

   One area that has driven research on NDE of plastic welds is the use of High-density polyethylene (HDPE) in nuclear power plants. Metal piping has traditionally been used for cooling water piping; however, HDPE offers significant advantages due to its significantly longer service life and its strength to weight ratio. [ 6 ]

5. Welding - Wikipedia

   en.wikipedia.org/wiki/Welding

   Welding thermoplastic with heat is very similar to welding glass. The plastic first must be cleaned and then heated through the glass transition, turning the weld-interface into a thick, viscous liquid. Two heated interfaces can then be pressed together, allowing the molecules to mix through intermolecular diffusion, joining them as one.

6. Radio-frequency welding - Wikipedia

   en.wikipedia.org/wiki/Radio-frequency_welding

   Radio-frequency welding, also known as dielectric welding and high-frequency welding, is a plastic welding process that utilizes high-frequency electric fields to induce heating and melting of thermoplastic base materials. [1] The electric field is applied by a pair of electrodes after the parts being joined are clamped together.

7. Hot gas welding - Wikipedia

   en.wikipedia.org/wiki/Hot_gas_welding

   Hot-gas welding is a manual plastic welding process for joining thermoplastic materials. A hot-gas torch is used to direct hot air to both the joint surface and weld rod, heating the materials to their softening temperature.