How to mutually position bisecting parts of opposing pairs of shaping tools, especially shaping tools for manufacturing precision parts such as contact lenses

摘要

The present invention proposes in particular a shaping tool for manufacturing precision parts such as contact lenses, wherein the shaping tool has two bisectors with inserts 18, 38 fitted therein and having cavities 50 formed between the inserts. Includes parts. The tool is made of ceramic glass with negligible thermal expansion in a given work area. On both sides of the cavity 50 is determined the shape of the article to be manufactured and placed roundly shaped ceramic glass inserts along the circumference of the positioning plates 16, 36 made of ceramic glass. These positioning plates 16 and 36 are mounted on the ceramic glass mounting plates 14 and 34 respectively.