Mold and die shops cut cavities, cores and dies for injection molding, stamping and forging — usually from hardened tool steel, demanding fine finishes on complex 3D surfaces. It's a blend of high-speed machining soft, then hard milling, grinding and EDM after heat treat.
High-speed machining centers with fast, rigid spindles produce the 3D surfaces; sinker and wire EDM cut the sharp internal detail a cutter can't reach; grinding finishes the flats. Controller look-ahead and thermal stability separate a good mold machine from an average one.
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