This is an essential tool for electronic production and electrical maintenance, the main purpose is to weld components and wires, according to the mechanical structure can be divided into internal heating type electric and external heated soldering iron, according to the function can be divided into non suction tin soldering iron and tin soldering iron, according to different purpose is divided into high power electric and small electric power.

Structure introduction:
Soldering iron can be divided into internal and external heated type two kinds:
External heated soldering iron by soldering iron head, iron core, shell, wood handle, power wire, plug and other parts. Due to the welding head is installed inside the heater, so called external heated soldering iron.

Key components in electric soldering iron core, it is the heating wire winding in parallel on a hollow ceramic tube, in the middle of the mica insulation, and draw out the two wire connected to 220 v ac power.

External heated electric specifications of many commonly used 25 w and 45 w, 75 w, 100 w, etc., the greater the power the higher the temperature of welding head.

Internal heating soldering iron by handle, connecting rod, spring clip, iron core, welding head. Because the iron core is installed inside the welding head, so heat fast, thermal efficiency is high, therefore, known as the internal heating soldering iron.

Internal heating of the soldering iron to 20 w, 50 w several commonly used specifications. Because of its high thermal efficiency, 20 w with internal soldering iron is equivalent to about 40 w external heated soldering iron.

Internal heating type electric backend is hollow, used for the socket on the connecting rod, and fixed with a spring clip, when need to replace welding head, must first will spring clip out, at the same time with pliers clamp the front end of the welding head, pull out slowly, remember that not too hard, so as not to damage the link rod.

Directions for use.

Mobile phone repair, often to replace the circuit components, on the need to use the soldering iron, and is also high to the requirement of it. This is because the surface-mount technology on mobile phone components, components of small size, high integration, fine printed circuit, welding plate is small.

If improper selection soldering iron in the welding process is easy to cause man-made fault, such as virtual welding, short circuit, and even bad welding circuit board, so as far as possible choose high-grade some soldering iron, such as constant temperature tempering antistatic soldering iron. In addition, some large devices, such as welding shield, to adopt high power electric, so prepare to an average of more than 60 w coarse soldering iron head.

Method of use:

1, choose suitable solder, should choose welding electronic components with low melting point of solder wire.

2, flux, with 25% of the rosin dissolved in 75% alcohol as flux (weight ratio).

3, soldering iron tin before use, the specific method is: will be electric heat, can be just the molten solder, flux on besmear, evenly coated with solders in the soldering iron head again, make welding head even eat on a layer of tin.

4, welding method, welding plate and pin of components with fine sandpaper clean, besmear flux. Contact with welding head with proper soldering, solder joints, stay all solder melting on the solder joints and immersion element lead head after soldering iron head gently upwards along the components of the pin a leave solder joints.

5, welding time shoulds not be too long, otherwise easily burnt components, tweezers grip the pin if necessary help to heat dissipation.

6, solder joints shall be a sine wave shape, smooth surface should be bright, wuxi, moderate amount of tin.

7, after completion of welding, want to use alcohol clean residual flux on the PCB, in case after the carbonized flux affect the normal work of the circuit.

8, integrated circuit should be the final welding, soldering iron should be reliable grounding, or power after the use of waste heat of welding. Or use special integrated circuit socket, good welding socket and then plug the integrated circuit.

9, soldering iron should be on the iron frame.

Dongguan shuangmao electronics technology co., LTD is a professional development, production and sales of high performance constant temperature soldering station. High-frequency high power welding machine, hot air welding machine, welding head, iron stand, electronic connectors, switch power supply, power adapter, soldering materials of electronic science and technology co., LTD. : brands - SMT double alum, SUOBA speed, ZLONG intelligence​