Plastic welding is welding for semi-finished plastic materials, the process of uniting softened surfaces of materials, generally with the aid of heat (except solvent welding). Welding of thermoplastics is accomplished in three sequential stages, namely surface preparation, application of heat and pressure, and cooling. Numerous welding methods have been developed for the joining of semi-finished plastic materials. Based on the mechanism of heat generation at the welding interface, welding methods for thermoplastics can be classified as external and internal heating methods.

Hot gas welding, otherwise called hot air welding, is a plastic welding method utilizing heat. An extraordinarily planned warmth weapon, called a hot air welder, creates a fly of hot air that mollifies both the parts to be joined and a plastic filler bar, which must all be of the same or a fundamentally the same as plastic. (Welding PVC to acrylic is a special case to this run the show.)

Hot air/gas welding is a typical creation system for assembling littler things, for example, substance tanks, water tanks, warm exchangers, and pipes fittings.

On account of networks and movies a filler bar may not be utilized. Two sheets of plastic are warmed by means of a hot gas (or a warming component) and after that moved together. This is a snappy welding process and can be performed ceaselessly.