Six Common Methods for Removing Tin in Circuit Board Processing? （Part 1）

How to remove tin in circuit board processing? Generally speaking, there are  6 methods:

1. Blow directly with the 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 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 sucker to disassemble the integrated block. This is a common professional method. The tool used is an ordinary electric soldering iron with a power of 35W or more. 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.

3. Disassembly method of a 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.

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.