3D Modelling of Thermal Replication for Designing Progressive Glass Moulds

Worldwide, ESSILOR International provides customers with Progressive Addition Lenses (PAL), which replace bifocal lenses. Thermal replication is one process to produce glass moulds for PAL, using sagged glass on a ceramic slumping block. In this paper, thermal replication for producing PAL glass mou...

Full description

Saved in:
Bibliographic Details
Published in:New journal of glass and ceramics 2013-01, Vol.3 (1), p.34-42
Main Authors: Lochegnies, Dominique, Moreau, Philippe, Hanriot, Fabienne, Hugonneaux, Patrick
Format: Article
Language:English
Subjects:
Ceramics
Glass
Modelling
Molds
Moulds
Replication
Three dimensional models
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Worldwide, ESSILOR International provides customers with Progressive Addition Lenses (PAL), which replace bifocal lenses. Thermal replication is one process to produce glass moulds for PAL, using sagged glass on a ceramic slumping block. In this paper, thermal replication for producing PAL glass moulds is developed through 3D modelling and experimentation. Our numerical approach is validated by comparing it with experimentation on the global 3D topology of the sagged glass. It is also validated by using more severe optical comparison criteria, developed by ESSILOR International to analyze the conformity of their products. Through modelling, the thermal replication is analyzed by studying the evolving contact between the sagged glass and the ceramic slumping block during the thermal cycle and the glass flow on the upper side of the sagged glass.
ISSN:2161-7554
2161-7562
2161-7562
DOI:10.4236/njgc.2013.31006