Why doesn't the soldering iron wire stick?
Soldering iron mainly by the handle, power cord, heating core, iron head, mica composition (some precision and a variety of temperature control circuits) in accordance with their heating method can be divided into two categories of endothermic soldering iron and exothermic soldering iron, which corresponds to different occasions of use. The reason why called endothermic iron, because the endothermic iron iron head is hollow, its heating core in the iron head of the internal hollow, so called endothermic iron.
Endothermic soldering iron iron head, the last side of the hollow structure
The external heat type soldering iron iron head is just the opposite of the internal heat type soldering iron, the external heat type soldering iron iron head is solid, generally made of copper material. The heating core of the external hot iron is directly wrapped around the iron head, that is, the iron head is inserted in the interior of the heating core, so it is also called the external hot iron.
Externally heated soldering iron tip, solid structure
Whether it is an internal or external hot soldering iron, their working principle is the same.
A small part of the heat emitted by the heating core is lost to the surrounding air, and most of the heat is still exported to the soldering iron head, the temperature of the iron head can reach 200-450 degrees, which can melt the solder for welding.
Why the soldering iron does not stick to the solder
1, the soldering iron is used for a long time, the internal heating core aging or damage, the heat issued can not reach the melting point of the solder, resulting in the soldering iron head does not stick to the solder.
2, the daily use of the process, after the use of the soldering iron does not have a soldering iron head for tin treatment, resulting in the soldering iron head in the high temperature and air oxidation.
