The structure of the internal heating electric soldering iron, how to use the internal heating electric soldering iron?
Internal heating type soldering iron
The iron head of the internal heating electric soldering iron is inserted into the soldering iron core. Depending on the power, it can be used after 2 to 5 minutes of power on. The maximum temperature of the soldering iron tip can reach about 350°C. Commonly used internal heating soldering irons are 20W, 25W, 30W, 50W and so on. Generally, a 20-30W internal heating electric soldering iron is enough for electronic equipment repair.
The structure of the internal heat soldering iron
The internal heating electric soldering iron is composed of a shell, a handle, a soldering iron tip, a soldering iron core, and a power cord. The handle is made of heat-resistant Bakelite, which will not be damaged by the heat of the soldering iron. The tip of the soldering iron is made of copper, and its quality has a lot to do with the quality of the soldering. The soldering iron core is made of a very thin nickel-chromium resistance wire wound on a porcelain tube. Under normal conditions, its resistance value is 1-3kΩ depending on the power. The shell of the soldering iron core is generally made of seamless steel pipe, so it will not be deformed due to overheating. Some fast-heating electric soldering irons are made of brass tubes. Due to the fast heat transfer, it is not suitable to use electricity for a long time, otherwise the handle will be damaged. The binding posts are made of copper screws, which are used to fix the soldering iron core and the power cord.
Use of internal heat soldering iron
Before using a new electric soldering iron, use a multimeter to measure the resistance at both ends of the power cord. If the resistance is zero, it means that the wire is touched internally. You should disassemble it, disconnect the wire and plug in the power again; if there is no resistance, most of them are soldering iron cores. Or the lead wire is broken; if the resistance is around 3kΩ, plug in the power again, pick up the electric soldering iron and dip it in the rosin after a few minutes, it should smoke and make a "squeak" sound under normal conditions, then dip it in tin again, let the tin Dip the soldering iron fully to solder.
