[Fran] shows us how to build a plastic friction welder. It’s a method of connecting plastic pieces. While it’s new to us, apparently this type of tool was given to kids about forty years ago ...

Irons, torches, or plastic welder guns provide a point-source of heat for melting solder or filler alloys at a joint or interface. Typically, soldering irons are heated using electrical resistance.

Plastic welding tools can apply heat through methods including simple hot air, focused lasers, and even powerful vibrations. As long as it makes things hot, just about anything goes. There are two ...