In mold making process, We need used EDM method to got required mold cavity shape. Which is better EDM material, copper electrode or graphite electrode? This article will explain their features. Precision EDM(Electrical Discharge Machining) is an indispensable process in die or mold manufacturing process. Electrodes must be used for discharge. There are two kinds of common materials for electrodes, one is copper , the other is graphite . Copper Electrode The difference between copper and graphite as electrodes: Copper is widely used as electrode material in EDM in die and mould factories. Many people think that graphite material will be considered as an alternative only when large electrodes are manufactured and die machining requirements are not high or rough machining process. Now, in Europe, where manufacturing technology is leading, more than 90% of the electrode materials used by mould enterprises are graphite. However, in China...