Thermoplastics welding has been growing in importance over the past few decades, holding these days a rank similar to that of metal welding in industrial production and fabrication applications. Hot gas extrusion welding is a semi-mechanical process for joining thermoplastic sheeting and films right through to thick-walled fabrications. Factors governing the quality of the weld seam are not only the craftsmanship and skill of the welder but also the capabilities of the hand extruder employed. The extrudate output, preheat and extrudate temperatures are set on the hand extruder as a function of the weld thickness and the type of welding material employed. The quality of the weld is then determined by the welder via the welding speed and the welding shoe contact pressure applied to the parts to be joined.
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