To the printed circuit board(PCB) drilling, the drilling entry aluminum coil for pcb is used to prevent the burrs from being generated on the surface of the printed circuit board and the copper foil on the bottom surface, so that the drilling surface of the printed circuit board is smooth to improve the quality and the yield. Since the use of such an auxiliary material has a certain cost, it is actually necessary to use it for the above reasons, which can greatly improve the yield of the product and reduce the cost.
The effect and advantages of pcb drilling entry aluminum sheet coil are:
1. Buffering force to prevent burrs and scratches on the surface of PCB board.
2. The effect of heat dissipation and drill bit cleaning, because the drill needle friction heat when running at high speed.
3. Bit positioning can guide the drill bit into the track of the PCB board to prevent the needle from being biased to improve the accuracy of the drilling.
The aluminum coil for pcb requires a large thermal conductivity, so that the heat generated during drilling can be quickly taken away and the temperature of the drill tip can be lowered. The aluminum sheet coil of 0.13-0.18 mm thickness should be used as much as possible, it can prevent the drill bit from being broken due to the high temperature of the drill hole caused by the high temperature during drilling.