A soldering iron core is a product that is widely used in many occasions. It can be divided into several categories, depending on the usage scenario, and the use and product pricing are different. The iron core is small in size, excellent in performance parameters, and fast in temperature rise, so it is more common in the market. Then let's take a look at a few related to the iron core with the small series. They are the introduction of the iron core and the five-step method of using the iron core, the advantages, classification and use of the iron core.
First, the introduction of the iron core
The iron core is a key component of the soldering iron. It is formed by winding the heating wire in parallel on a hollow ceramic tube. The mica sheet in the middle is insulated, and two wires are connected to the 220V AC power supply.
Second, the advantages of the iron core
The utility model has the advantages of simple structure, small volume, fast heating speed, uniform heating, fast heat dissipation, no fire when used in heat, and the heating circuit is completely isolated from the air, and no oxidation occurs.
Third, the classification of the iron core
At present, there are two main types of soldering iron cores: one is a resistance wire wound. The other is a resistor paste firing.
Fourth, the use of the iron core
When soldering a circuit board, be sure to control the time. Too long, the board will be burnt or cause the copper foil to fall off. When removing components from the board, the soldering iron tip can be attached to the solder joints. After the tin on the solder joints is melted, the components are pulled out. The temperature of the soldering iron has a certain relationship with the size, shape and length of the soldering iron. When the size of the tip is relatively large, the hold time is longer.
Five, the use of iron core and steps
1. Prepare for welding.
2. Heat the weldment.
3. Melt the solder.
4. Remove the solder.
5. Remove the soldering iron.
6. The difference between the internal heating type iron core and the external heating type iron core
A: Definition of external thermal soldering iron and internal thermal soldering iron
The definition of the internal heating type soldering iron: the heat element is inside the soldering copper head, or is interpreted as "the tip of the soldering iron is placed outside the heating element", so that heat is transferred from the inside to the soldering iron tip, which has a fast heat, high heating efficiency and small volume. Light weight, low power consumption, smart use, etc. It is suitable for welding small components. However, due to the high temperature of the soldering iron tip, it is easy to oxidize and blacken, the iron core is easy to be broken, and the power is small, only 20W, 35W, 50W and other specifications.
External thermal soldering iron definition
External heat means that the heat is generated outside because the heating resistor is outside the tip. It is suitable for welding large components and for soldering small components. There are 25W, 30W, 50W, 75W, 100W, 150W, 300W and so on.
B: The difference between external heat type electric iron and internal heat type soldering iron
First of all, there is a big difference in the structure of the soldering iron head. The internal heating type iron tip is hollow, because the heating core is built in, the external heating type iron tip is solid, and its heating core is external.
You can see it clearly from the soldering iron construction drawing. The external heating type heating core is separated from the soldering iron head by a heating tube in the middle.
The soldering iron head of the external heating type soldering iron is inside the heating core, and is also called an ordinary electric soldering iron. Soldering ordinary products, there is no requirement for temperature to use an external thermal soldering iron. Since the heating resistor wire is outside the soldering iron tip, most of the heat is radiated to the external space, so the heating efficiency is low and the heating speed is slow. It is generally necessary to preheat for 6 to 7 minutes to weld. Its large size makes it inconvenient to solder small devices. But it has the advantage that the tip is used for a long time and the power is large.
The internal heating type soldering iron, the shape of the iron head used for the internal heating type soldering iron is a hollow tube shape, and the heating element is covered by the soldering iron head, so that the heat thereof is not easily dissipated into the air, so the heat utilization efficiency is high, and the warming time is higher. Short, and the power is generally not too large to meet the requirements, the general internal thermal power is below 50W, common 20W ~ 30W internal heat type soldering iron. There are single handles and soldering stations. The 936 soldering station is a typical internal heat soldering iron, but it is also thermostatic. Now it's a lead-free soldering iron, better than the first two.
The above is a detailed introduction to the relevant text picture information about the iron core, which are the introduction of the iron core and the five-step method of using the iron core, the advantages, classification and use of the iron core. Through introduction, we learned that the iron core can be divided into two types: internal heat type and external heat type. According to different usage scenarios and brand performance differences, there are differences in quotation and so on. Everyone needs to rely on their own when they actually purchase. Demand and budget considerations. 
Editor in charge: Zhao Hongli
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