B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
B29D 11/00 (2006.01) B29C 33/30 (2006.01)
Patent
CA 2375003
The invention relates to a method for moulding an optical lens by means of two moulding shells (10A,10B) and a closing element (11) acting in the periphery thereof. According to the invention, the moulding shells (10A,10B) are placed in holding means (13A,13B). If necessary, one of the holding means (13A,13B) is made to rotate around a centering axis (A) which is common to the unit. The moulding shells (10A,10B) are removed from the holding means (13A,13B) using removing means (14A,14B). The possible inclination of the moulding shells (10A,10B) is verified in relation to a reference plane. If necessary, their position is adjusted in relation to the removing means (14A,14B) which bear them. Both of the moulding shells (10A,10B) are moved towards each other using the removing means (14A,14B) while maintaining their position in relation thereto. The closing element (11) is placed around the moulding shells (10A,10B) and the moulding cavity (12) thus formed is filled. The invention can be used with optical lenses which are made of a polymerizable material.
Il s'agit d'assurer le moulage d'une lentille optique par mise en oeuvre de deux coquilles de moulage (10A, 10B) et d'un élément de fermeture (11) intervenant à la périphérie de celles-ci. Suivant l'invention, on place les coquilles de moulage (10A, 10B) dans des moyens de maintien (13A, 13B), on fait tourner, si nécessaire, l'un de ces moyens de maintien (13A, 13B) autour de l'axe de centrage (A) commun à l'ensemble, on extrait les coquilles de moulage (10A, 10B) des moyens de maintien (13A, 13B) à l'aide de moyens de prélèvement (14A, 14B), on contrôle l'inclinaison éventuelle des coquilles de moulage (10A, 10B) par rapport à un plan de référence, on ajuste, si nécessaire, leur position par rapport aux moyens de prélèvement (14A, 14B) qui les portent, on rapproche les deux coquilles de moulage (10A, 10B) l'une de l'autre à l'aide de ces moyens de prélèvement (14A, 14B) en conservant leur position par rapport à ceux-ci, on dispose l'élément de fermeture (11) autour des coquilles de moulage (10A, 10B), et on assure le remplissage de la cavité de moulage (12) ainsi formée. Application, notamment, aux lentilles ophtalmiques en matière polymérisable.
Bessiere Benoit
Bouslimi Naissan
Lavenir Marianne
Essilor International (compagnie Generale D'optique)
Robic
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