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Welding and Joining Processes - Plastic Welding, Plastic Joining, Infrared Plastic Welding (IR PLastic Welding)
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Heat Welding: Plastic welding with heat is simply the process of joining 2 pieces of plastic using a torch and filler material. Typically the torch uses very hot air to melt the material rather than a flame. Filler material can be fed either by hand, or many plastic welders and an automatic feed mechanism which feeds material from a roll.
Materials suitable for plastic heat welding are restricted to thermoplastics. Low melting temperature plastics such as polypropylene, polyethylene, PVC and PET are commonly welded using this process.
Some common applications are the welding of tanks for storing chemical solutions and fabrication of water tanks. Plastic welding is also very useful for plastic repairs and repairs of plastic components such as fairings and automotive interior components.
Solvent welding: In this plastic welding process, 2 plastic parts are joined using a solvent cement. The cement causes the surface of the plastic to become soft and sticky. The 2 parts are brought into contact and the solvent cement fuses the 2 parts together resulting in a very strong bond. Bonds can also be leak proof depending on joint geometry.
A common application for this process is the solvent welding of PVC storm water pipes and electrical conduits.
Infrared Plastic Welding: IR Plastic Welding is another method of plastic joining that works very similar to the heat staking process. The process uses an infrared source such as a tungsten filament to melt the plastic surface of 2 components to be joined and the heater element is retracted and the prts pushed together to form a strong plastic bond.
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