ApplicationsThermoplastic welding with hand extrudersThermoplastic welding has been growing in importance over the past few decades, being of similar significance today as metal welding in industrial production and fabrication applications. Hot gas extrusion welding is a semi-mechanical process for joining thermoplastic materials from thin films up to thick walled work pieces.
The quality of the weld seam does not only depend on the craftsmanship and skill of the welder but also on the properties of the hand extruder he uses.
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 assured by the welder via the selected welding speed and the welding shoe contact pressure applied to the parts to be joined.
To achieve optimum welding results, we recommend to consult the applicable guidelines of DVS-Standards or to attend a plastic welding course.
Working mode of the hand extruderDriven by an electric motor (1) the welding rod (2) is fed into the extruder (4) through the rod feeder (3). The welding rod is granulated by the extruder screw und pressed into the melting chamber (5) where it is molten down to a homogenous mass before being discharged through the extruder nozzle. In parallel to the extrusion process, the parts to be joined are heated to welding temperature by hot air supplied through the preheat nozzle (6). The molten extrudate is pressed onto the preheated parts to be joined and formed into a weld seam by the welding shoe (7).
Air supply of the hot air unit (8) of the hand extruder is ensured either by a separate compressor or an integrated blower.
|
NEWS
DownloadsMunsch BrochuresHere you can download our latest brochures.  |
|