Core locking assembly and method for orientation of...

B - Operations – Transporting – 29 – D

Patent

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B29D 11/00 (2006.01) B29C 33/40 (2006.01) B29C 45/00 (2006.01)

Patent

CA 2592524

An apparatus and method is provided for injection molding an ophthalmic lens mold section having an optical surface and a non-optical surface opposite the optical surface. The apparatus includes a non- optical tool assembly for forming the non-optical surface of the ophthalmic lens mold section. An optical tool assembly is in opposed relation to the non-optical tool assembly and together therewith forms a mold cavity for forming the ophthalmic lens mold section. In the preferred embodiment, the optical tool assembly includes a rotatably mounted core member (56) and an optical insert (58) removably secured the core member. The optical insert has an optical molding surface (62) for forming an optical surface of the ophthalmic lens mold section opposite the non-optical surface thereof. A locking mechanism (122) having, in a preferred embodiment, a locking pin selectively movable between a first position wherein the pin allows rotation of the core member and a second position wherein the pin prevents the core member from rotation.

L'invention concerne un appareil et un procédé destinés au moulage par injection d'une section de moulage de lentille ophtalmique possédant une surface optique et une surface non optique opposée à la surface optique. L'appareil comprend un ensemble d'outil non optique destiné à former la surface non optique de la section de moulage de lentille ophtalmique. Un ensemble d'outil optique est en relation opposée à l'ensemble d'outil non optique et forment ensemble une cavité de moule destinée à former la section de moulage de lentille ophtalmique. Dans un mode de réalisation préféré, l'ensemble d'outil optique comprend un élément noyau (56) monté de façon rotative et un insert optique (58) fixé amovible à l'élément noyau. L'insert optique possède une surface de moulage optique (62) destinée à former une surface optique de la section de moulage de lentille ophtalmique opposée à la surface non optique de celle-ci. Un mécanisme de verrouillage (122) possédant, dans un mode de réalisation préféré, une tige de verrouillage sélectivement mobile entre une première position dans laquelle la tige permet la rotation de l'élément noyau et une seconde position dans laquelle la tige empêche l'élément noyau de tourner.

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