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  2. Plastic welding - Wikipedia

    en.wikipedia.org/wiki/Plastic_welding

    Hot gas welding, also known as hot air welding, is a plastic welding technique using heat. A specially designed heat gun, called a hot air welder, produces a jet of hot air that softens both the parts to be joined and a plastic filler rod, all of which must be of the same or a very similar plastic. (Welding PVC to acrylic is an exception to ...

  3. Ultrasonic welding of thermoplastics - Wikipedia

    en.wikipedia.org/wiki/Ultrasonic_welding_of...

    The materials to be welded experience similar vibrations to those in plunge welding but shorter in time. [3] Hold force to the newly welded region is provided by previously welded section that has come out of the tooling and cooled down. [1] Scan welding is a type of continuous ultrasonic welding in which case large plates or sheets can be ...

  4. Plastic weld non-destructive examination - Wikipedia

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

    The use of plastic pipe is limited in safety critical applications due to the lack of accepted NDE techniques and acceptance criteria. For butt welded plastic pipe, TestPEP proposed the use three different ultrasonic techniques. TOFD with PAUT probes to inspect the majority of the weld, traditional PAUT to look for flaws in the middle of the ...

  5. Electrofusion welding - Wikipedia

    en.wikipedia.org/wiki/Electrofusion_Welding

    It is most commonly used to join polyethylene (PE) and polypropylene (PP) pipes. Electrofusion welding is the most common welding technique for joining PE pipes. [1] Because of the consistency of the electrofusion welding process in creating strong joints, it is commonly employed for the construction and repair of gas-carrying pipelines. [2]

  6. Hot plate welding - Wikipedia

    en.wikipedia.org/wiki/Hot_plate_welding

    Hot plate welding, referred to as fusion welding in many industries, is commonly used to join plastic pipes. These pipes, as opposed to steel ones, are less likely to rupture during an earthquake. [1] Pipe welding uses special joint configurations, namely butt, socket and saddle/sidewall, each with its own welding procedures.

  7. Implant induction welding of thermoplastics - Wikipedia

    en.wikipedia.org/wiki/Implant_Induction_Welding...

    Implant induction welding is a joining method used in plastic manufacturing. The welding process uses an induction coil to excite and heat electromagnetically susceptible material at the joint interface and melt the thermoplastic. The susceptible material can be contained in a gasket placed between the welding surface, or within the actual ...

  8. 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.

  9. Friction welding - Wikipedia

    en.wikipedia.org/wiki/Friction_welding

    Friction welding (FWR) is a solid-state welding and bonding process that generates heat through mechanical friction between workpieces in relative motion to one another. The process is used with the addition of a lateral force called "upset" to plastically displace and fuse the materials. [1]

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