Mold and method for casting ophthalmic lenses

B - Operations – Transporting – 29 – D

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B29D 11/00 (2006.01) B29C 31/04 (2006.01) B29C 33/00 (2006.01) B29C 33/10 (2006.01) B29D 11/02 (2006.01)

Patent

CA 2440897

This invention relates generally to ophthalmic molds and methods useful for casting ophthalmic moldings. In one aspect, the invention relates to a mold for casting an ophthalmic molding formed from a first mold half detachably affixed to a second mold half, whereby the mold has a top and a bottom; and a cavity formed by the first and second mold halves, wherein the cavity receives a lens forming material through an opening at the bottom of the mold and vents gas and excess lens forming material from an opening at the top of the mold. In another aspect, this invention relates to methods for casting ophthalmic moldings, particularly intraocular lenses.

La présente invention concerne d'une façon générale des moules ophtalmiques et des procédés convenant pour la coulée de moulages ophtalmiques. Par l'un de ses aspects, l'invention se rapporte à un moule pour la coulée d'un moulage ophtalmique. Ce moule, constitué de deux demi-coques reliées l'une à l'autre, distingue un dessus et un fond. Les deux demi-coques définissent entre elles une cavité recevant le matériau de formation de la lentille via un orifice dans le fond du moule, tout en évacuant par un orifice ménagé dans dessus les gaz et l'excédent de matériau destiné à la formation de la lentille. Par un autre de ses aspects, l'invention se rapporte à des procédés en liaison avec la coulée de moulages ophtalmiques, en particulier de lentilles intraoculaires.

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