Which mold for 750 °C microcrystalline glass bending, and why does graphite carbonise?
Microcrystalline glass bending needs 750 °C+. Graphite oxidises and carbonises badly there; CC-3D carbon-based composite molds do not, and last 50×+ longer.
1Temperature bands: 680–700 °C vs 750 °C+
Normal cover glass bends at ~680–700 °C, where graphite still works; microcrystalline glass needs 750 °C+. Graphite oxidation rises sharply with each step up, so 'graphite works for normal glass' does not mean it works for microcrystalline glass.
2The knock-on effects of carbonisation
Carbonisation affects more than life: changing mold surface condition transfers to the glass (scratches, pits), thermal deformation drifts accuracy and curvature consistency, and frequent changeover breaks production rhythm. High-temperature scenarios need life + accuracy + yield solved together.
3The fit
CC-3D targets 750 °C+ microcrystalline bending (where graphite carbonises): no oxidation/carbonisation at 750 °C+, low thermal deformation, stable accuracy, anti-stick coated surface, and 50×+ graphite life.
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