Features of the External Heat Solder Iron
1,External heat type soldering iron
Soldering iron head, iron core, shell, wooden handle, power supply lead, plug and other parts of the composition of the iron head installed in the iron core inside, known as the external heat type soldering iron.
2,Components
Soldering iron core is the key component of the soldering iron, the electric wire parallel winding in a hollow porcelain tube, the middle of the mica sheet insulation, and lead to two wires and 220V AC power supply connection.
3, product specifications
External thermal soldering iron specifications are many, commonly used specifications are 25W, 45W, 75W, 100W, etc., the greater the power of the soldering iron head temperature is higher.
The different power specifications of the iron core, its internal resistance is different. 25W iron resistance value is about 2k Ω, 45W iron resistance value is about 1 k Ω, 75W iron resistance value is about 0.6 k Ω, 100W iron resistance value is about 0.5 k Ω.
4, the use of materials
Soldering iron head made of copper material, its role is to store heat and conduct heat, the temperature must be much higher than the temperature of the soldering.
The temperature of the soldering iron is related to the volume, shape and length of the iron tip. When the volume of the iron head is relatively large, the holding time is longer.
In order to adapt to the requirements of different welding objects, the shape of the iron head has the same, generally conical, chisel-shaped, round bevelled and other shapes.
