Hot gas extrusion welding (WE)
Hot gas extrusion welding is preferred over high-speed hot gas welding for wall thicknesses from about 6 mm. With extrusion welding, shorter working times, higher strength and lower internal stress is expected compared to manual welding. This leads to higher process reliability and greater efficiency.
For this, you require a welding shoe corresponding to the welding geometry and a welding filler consisting of the same material as the base material, which is plasticized in the extruder.
First, put joining surfaces into the thermoplastic state using hot air. Immediately press the extrudate onto the surfaces or into the joint using the welding shoe. Depending on the working position, you should apply different intensities of pressure. Welding speed is determined by the quantity of extrudate and by the dimensions of the weld seam. In addition, it must correspond to the prewarming of the base material.