Pendulum Welding:
The "Pendulum Welding" technique, can be used for short weld runs, or when access is difficult. Fit the standard nozzle (LE100303) on the welding tool.
Set the required welding temperature on the welding tool using the guide provided. This is carried out using the red rotary dial on the end of all Techspan Plastic Welders.
Once up to temperature (from cold, this takes approx. 1.5 minutes), select the correct welding rod (see our previous Tech Tip covering "Plastics Indentification"). Cut the start of the welding rod to a point. This will help with the initial flow of the weld rod. A pendulum motion is used to evenly heat the parent material and the welding rod. Feed the welding rod into the welding area, while curving the tail of the weld rod away from the welding tool. This will help you control the rod feed during welding and will allow the operator to observe the material flow during welding. Welding should be carried out in one continuous run along the length of the area to be welded. Welding speed should be adjusted to the point where you observe a slight 'wash' at the sides of the welding rod. Ensure that your pendulum motion is providing even heating of both the parent material and the welding rod throughout the weld run. When complete, allow the plastic component to cool completely before attempting to trim or clean up the welding area. This is important as the plastic will not be at full strength until completely cool. Triming & sanding can now be carried out if required.
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