As nicely as allowing the formation of shapes which are be} tough to machine, the method allows pre-hardened moulds to be formed in order that no warmth therapy is required. Changes to a hardened mould by conventional drilling and milling usually require annealing to melt the mould, followed by warmth therapy to harden it again. EDM is a simple course of in which a formed electrode, often made from copper or graphite, may be very slowly lowered onto the mould surface over a period of many hours, which is immersed in paraffin oil . A voltage applied between device and mould causes spark erosion of the mould surface in the inverse Ceramic Teapots form of the electrode.
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As nicely as allowing the formation of shapes which are be} tough to machine, the method allows pre-hardened moulds to be formed in order that no warmth therapy is required. Changes to a hardened mould by conventional drilling and milling usually require annealing to melt the mould, followed by warmth therapy to harden it again. EDM is a simple course of in which a formed electrode, often made from copper or graphite, may be very slowly lowered onto the mould surface over a period of many hours, which is immersed in paraffin oil . A voltage applied between device and mould causes spark erosion of the mould surface in the inverse Ceramic Teapots form of the electrode.
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