1. Heat dissipation, because the drill needle runs at high speed, friction generates heat
2. Fix the drill needle, reduce the vibration during operation, and prevent the hole diameter and hole position deviation caused by the deviation of drill needle
3. Prevent the drill needle from scratching the surface of PCB
PCB drilling covered with aluminum entry Sheet
Alloy: 1050 1060 1100 h18 h119, the aluminum content is more than 99%, and h18 H19 is the main state,
Thickness: 0.125-0.24mm,
Coil width: About 600mm, sheet width is 1244 / 1245mm
PCB drilling covered with aluminum entry sheet, the surface requirements of aluminum sheet must meet the following two points:
1. The surface of aluminum plate shall be clean and free from cracks and oxidation debris.
No indentation, scratch, roll indentation and other defects are allowed on the surface of aluminum plate.
