| abstract |
The invention concerns a mould insert, in particular for casting and injection moulding machines, made of technical ceramics on an oxide, nitride, carbide or cermet basis or mixtures thereof with a polished scratch-resistant mould surface and its use in a process for the manufacture of plastic parts, in particular for parts with a surface of high optical quality, special lenses, mirrors, compact discs and special moulds for transparent, reflexion, laser and transmission optics, made preferably from transparent plastics, in particular thermosetting or thermoplastic plastics. |