PCB Tech - Six common methods for removing tin in PCB board processing

How to remove tin inPCB board processing? Generally speaking, there are the following 6 methods:
1. Blow directly with hot air gun
This is the most direct, easiest, and fastest method. Use a hot air gun to repeatedly blow the solder around the pins of the IC block for many times, and then slowly pry the IC block with a thin needle or a blade to remove it.

If there is no heat gun, the following methods can be used:
2. The method of disassembling the tin suction device
Use a solder suction device to disassemble the integrated block, which is a common professional method. The tool used is an ordinary suction and soldering electric soldering iron, and the power is above 35W. When disassembling the integrated block, just put the heated dual-purpose electric soldering iron tip on the pins of the integrated block to be disassembled. After the solder joints melt, they will be sucked into the thinner. After the solder of all the pins is sucked, the integrated block will be ready. Can be removed. To
3. Disassembly method of medical hollow needle
Take a few medical hollow needles of 8 to 12 gauge. When using, the inner warp of the needle should just cover the pins of the integrated block. When disassembling, use a soldering iron to melt the pin solder, put the needle on the pin in time, then remove the soldering iron and rotate the needle, and then pull out the needle after the solder solidifies. In this way, the pin is completely separated from the printed board. After doing this for all pins, the integrated block can be easily removed. To
4. Cooperating disassembly method of electric soldering iron brush
The method is simple and easy to implement, as long as there is an electric soldering iron and a small brush. When disassembling the integrated block, heat the electric soldering iron first. When the solder on the pins is melted by the melting temperature, take the opportunity to wipe off the melted solder with a brush. In this way, the pins of the integrated block can be separated from the printed circuit board. This method can be carried out separately or separately. Finally, use sharp tweezers or a small "one" screwdriver to pry off the integrated block.
5. Add solder melting and disassembly method
This method is a labor-saving method, as long as some solder is added to the pins of the integrated block to be disassembled, so that the solder joints of each column of pins are connected, so as to facilitate heat transfer and facilitate disassembly. When disassembling, use an electric soldering iron to heat each column of pins with a sharp tweezers or a small "one" screwdriver to pry, and the two columns of pins are heated alternately until they are removed. Generally, each column of pins can be removed by heating them twice.
6. Multi-strand copper wire suction and disassembly method
It is to use multiple strands of copper core plastic wire, remove the plastic sheath, and use multiple strands of copper core wire (short wire ends can be used). Before use, put the rosin alcohol solution on the multiple copper core wires. After the electric soldering iron is heated, put the multiple copper core wires on the pins of the integrated block and heat them, so that the solder on the pins will be absorbed by the copper wires. The upper part of the solder can be cut off, and the solder on the pins can be completely sucked away by repeating it several times. The braided wire in the shielded wire can also be used if possible. As long as the solder is sucked up, use tweezers or a small "one" screwdriver to gently pry, and the integrated block can be removed.

The above are the six common methods for removing tin in PCB board processing? Introduction, ipcb company also provides PCB board manufacturers, PCB manufacturing technology, etc.