Features of external heating soldering iron
1. External heating soldering iron
The soldering iron is composed of a soldering iron tip, a soldering iron core, a housing, a wooden handle, power leads, a plug, and other parts. The soldering iron tip is installed inside the soldering iron core, which is called an external heating soldering iron.
2. Constituent components
The soldering iron core is a key component of an electric soldering iron. The heating wire is wound parallel to a hollow ceramic tube, insulated with a mica sheet in the middle, and two wires are connected to a 220V AC power supply.
3. Product specifications
There are many specifications for external heating electric soldering irons, with commonly used specifications including 25W, 45W, 75W, 100W, etc. The higher the power, the higher the temperature of the soldering iron tip.
The internal resistance of soldering iron cores varies depending on their power specifications. The resistance of a 25W soldering iron is about 2k Ω, a 45W soldering iron is about 1k Ω, a 75W soldering iron is about 0.6 k Ω, and a 100W soldering iron is about 0.5 k Ω.
4. Using materials
The soldering iron tip is made of copper material, and its function is to store and conduct heat. The temperature must be much higher than the temperature being soldered.
The temperature of a soldering iron is related to the volume, shape, length, etc. of the soldering iron tip. When the volume of the soldering iron tip is relatively large, the holding time is longer.
To meet the requirements of different welding objects, the shape of the soldering iron tip varies, generally including conical, chiseled, and circular inclined shapes.
