Understanding Copper Electrodes (EDM Electrodes) in Injection Molds 2025-07-29
In the world of injection mold manufacturing, precision is everything. When CNC machining reaches its limits—such as with intricate details, deep cavities, or sharp corners—Copper Electrodes (EDM Electrodes or "Tong Gong" in Chinese) come into play. These electrodes are essential for Electrical Discharge Machining (EDM), a process that uses controlled electrical sparks to erode metal and create highly accurate mold cavities.
In this blog, we’ll explore:
✔ What are Copper Electrodes?
✔ Materials Used for EDM Electrodes
✔ Design & Manufacturing Process
✔ Copper vs. Graphite Electrodes
✔ Common Challenges & Solutions
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