Haomei Aluminum

The PCB aluminum drilling entry sheet is suitable for the drilling process in the circuit board factory to act as the upper cover plate. The main function and usage is to prevent the burr and scratch on the surface of PCB board, improve the quality of drilling. Play the role of heat dissipation and cleaning, extend the service life of the drill bit. Guide the bit into the track of the PCB plate to improve the accuracy of the drilling hole position. So the aluminum sheet is widely used in the Printed Circuit Board drill. Therefore, the requirements for aluminum drilling entry sheet are as follows: 1, need a certain surface hardness to prevent the burr on the surface of PCB board, and at the same time not too hard to wear the drill bit. 2, requires large thermal conductivity, can quickly take away the heat of drill bit, decrease the temperature of the bit. 3, it should not only have a certain of elasticity and flexibility, so that the drill bit can deformation at the moment of con...

Aluminum drilling entry sheet refers to aluminum sheet for PCB drilling. PCB drill plate main products are divided into the upper sheet and the lower sheet. The former types include pure aluminum sheet, soft and hard aluminum alloy, bakelite and LE series. The latter includes phenolic board, phenolic resin plate, the veneer wood pulp board, wood pulp board. The purpose of the upper plate is that the PCB can be used to protect the board surface while drilling, at the same time fix the drill, reduce the offset, prevent the burr on the substrate, assist the drill pipe to distribute heat, and to help cleaning of drilling groove. In the above purposes, the cover plate also has five major needs, including enough soft, excellent thickness tolerance, formation, high temperature, low moisture absorption and not easy to deformation. As for the use of the lower PCB plate is to suppress the lower burr, through the PCB board, to protect the drilling machine and to ensure the quality of the subst...