1. Processing speed
Generally, the processing speed of graphite can be 2 to 5 times faster than that of copper.
2. Graphite materials are not prone to deformation
It has obvious advantages in electrode processing. The softening point of copper is about 1000 degrees, which is easily deformed due to heat; the sublimation and temperature of graphite is 3650 degrees; the coefficient of thermal expansion is not only 1/30 of copper.
3. Light weight
The density of graphite is only one-fifth of copper. Large electrode electrical discharge machining can effectively reduce the burden of machine tools (EDM) and is more suitable for large mold applications.
4. Less discharge consumption
For example, the C atoms of sparks also contain oil. During the discharge process, high-temperature sparks are generated. C atoms are decomposed into oil to replace the graphite electrode, and a protective film is formed on the surface of the graphite electrode to compensate for the loss.
5. No glitch
After the copper electrode is processed, it needs to be manually researched and trimmed to remove the burrs. However, there is no burr after graphite processing, which saves a lot of enterprise costs, and it is easier to achieve automatic production in China.
6. Graphite materials are easier to grind and polish
Since copper is only 1/5, it is easy to manually grind and polish the cutting resistance of graphite.
7. The cost of graphite material is lower and the price is more stable
Due to the increase in copper prices in recent years, the price of isotropic graphite is now lower than that of copper.