The abrading dies tough silicone carbide surface will not wear against graphite.  Thus, abrading dies can be reused many

Hausermann
"American leadership in
EDM technology"

Casting Abrading
Dies

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Model placed in lay-up box ready for casting.

Epoxy layer containing silicone carbide being applied to model.

Cooling coils placed in box over epoxy to control shrinkage.

Epoxy backing material cast around cooling coils in box.

Cured abrading die machined square and flat with model still enclosed.

Abrading die separated from model, ready to mount in abrading machine.

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