The mold industry makes electrodes from graphite for mold processing. Graphite is flexible and has a high elastic coefficient, so it is suitable for processing into fine shapes. The oxidation of graphite and the pore inside are major obstacles to discharge operations. When the graphite electrode is large in size and large in discharging area, cracks occur in the graphite electrode as critical error. To solve this matter, high-quality graphite materials with fine grain size and impregnant & roasting treatment should be selected.
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