Graphite electrodes are easier to process and process faster than copper electrodes. For example, the processing of graphite by milling process is 2 to 3 times faster than other metal processing and does not require additional manual processing, while the copper electrode requires manual grinding. Similarly, if a high-speed graphite machining center is used to make the electrode, the speed will be faster, the efficiency will be higher, and no dust problem will occur. In these processes, choosing the right hardness tool and graphite can reduce the tool wear loss and electrode breakage. If the milling time of the graphite electrode and the copper electrode graphite electrode is specifically compared, the graphite is 67% faster than the copper electrode. In the general case of electrical discharge machining, the processing using the graphite electrode is 58% faster than the copper electrode. As a result, the processing time is greatly reduced, and the manufacturing cost is also reduced.
Graphite electrodes are different from conventional copper electrodes. Many mold shops usually have different reserves for roughing and finishing of copper electrodes, while graphite electrodes use almost the same amount of reservation, which reduces the number of CAD/CAM and machining times. For this reason alone, Sufficient to improve the accuracy of the mold cavity to a large extent.
Today, most plastic molds use graphite for electrode discharge machining, which eliminates the need for mold cavity polishing and chemical polishing to achieve the desired surface finish. It is impossible to produce such a workpiece by a copper electrode without increasing the time and the polishing process. In addition, graphite is divided into different grades, and the appropriate grade of graphite and spark discharge parameters can be used to achieve the desired processing effect under specific application procedures. If the operator uses the same parameters as the copper electrode on a spark machine using graphite electrodes, Then the result is definitely disappointing. If the material of the electrode is to be strictly controlled, the graphite electrode can be placed in a non-loss state during roughing (less than 1% loss), but the copper electrode is not used.