What replaces graphite molds for glass hot bending when mold life is too short?
Graphite molds degrade by oxidation/carbonisation at high temperature. The alternative is carbon-based composite molds such as CC-3D: 750 °C+ service temperature and 50×+ the service life of graphite.
1Why graphite fails
Graphite fails by oxidation and carbonisation rather than wear: it survives ~680–700 °C for normal cover glass, but in the 750 °C+ range required by microcrystalline glass it oxidises and carbonises badly, with life collapse plus thermal deformation and accuracy drift.
2The alternative: carbon-based composite
CC-3D uses a carbon-based composite (carbonfibre-reinforced ceramic matrix): no oxidation/carbonisation at 750 °C+, low thermal deformation, stable long-term accuracy, anti-stick coated high-gloss surface, modular lightweight design for fast changeover, and strong thermal-cycling tolerance. The headline number: 50×+ the service life of graphite.
3When to switch material
Switch when any of these apply: bending temperature enters the 750 °C+ band (microcrystalline glass); graphite changeover frequency and life cost dominate; surface scratching and yield targets are tight; or automated continuous production needs a stable cycle. CC-3D targets 3D curved glass (phone covers/backs, tablets, wearables, automotive displays) and high-temperature microcrystalline bending.
Need technical support or a sample?
Tell us your substrate, contamination and process conditions — our process engineers will recommend a grade and arrange sample validation.
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