How glue gun heating element works? Answered
I've got this little glue gun. On the package it said: 10 watts, AC 120-240V. First of all how is it the same wattage at 120 and 240 volts? I wouldn't think it could be.
Another question. I took it apart expecting to find a coil of nichrome like in a soldering iron. That is not what I found.
Instead I found that the power cord was soldered to two inch long twisty tie wire looking, insulated wires. I dont know what type of wire that would be. It appeared to be brass or copper on the inside coated in what looked like steel though the wire was not magnetic. These two inch long sections of wire had two little paddle contacts on the end and between them was a little rectangular chunk of aluminum. THe contacts and the aluminum chank were wrapped in orange cellophone it looked like. then Sandwiching that were two more flattish rectangular pieces of aluminum. That whole deal was tightly clipped with a steel clip to the alumium housing/nozzle inside of which the glue melts.
My question is-where is the resistor here? Measuring the resistance of the whole glue gun, cold, at the prongs of the plug, the resistance is around 1900 Ohms. I'm seeing some wires hooked to a chunk of aluminum. What am I missing thats creating 1900 Ohms of resistance? It must be that thin cellophane wrapper no? How this type of element works I do not understand. Help?