MOLDEO POR VACIADO Y ENVASADO DE LENTES DE CONTACTO

UN MOLDE PARA MOLDEO POR VACIADO DE UNA LENTE DE CONTACTO COMPRENDE UN PRIMER MIEMBRO DE COPA (16) CON UNA SUPERFICIE DE MOLDEO HEMBRA (19). LOS DOS MIEMBROS DE COPA (11, 16) FORMAN UN PISTON Y UN CILINDRO Y SE UTILIZAN EN UN RECIPIENTE DE PRESION (26) PARA APLICAR UNA PRESION DE CARGA PARA DESVIAR...

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Bibliographische Detailangaben
Hauptverfasser:	HAMILTON, RONALD SHADE, SEDEN, WILLIAM EDWARD
Format:	Patent
Sprache:	spa
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CLADDING OR PLATING BY SOLDERING OR WELDING CONTACT LENSES CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR OPTICS PERFORMING OPERATIONS PHYSICS PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SOLDERING OR UNSOLDERING SPECTACLES SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES TRANSPORTING WELDING WORKING BY LASER BEAM WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	UN MOLDE PARA MOLDEO POR VACIADO DE UNA LENTE DE CONTACTO COMPRENDE UN PRIMER MIEMBRO DE COPA (16) CON UNA SUPERFICIE DE MOLDEO HEMBRA (19). LOS DOS MIEMBROS DE COPA (11, 16) FORMAN UN PISTON Y UN CILINDRO Y SE UTILIZAN EN UN RECIPIENTE DE PRESION (26) PARA APLICAR UNA PRESION DE CARGA PARA DESVIAR LAS SUPERVICIES DEL MOLDE (14, 19) PARA MANTENER LA SUPERFICIE EN CONTACTO CON LA LENTE QUE SE ESTA MOLDEANDO. SE ABRE EL MOLDE CON LA SUPERFICIE DEL MOLDE (14) MIRANDO HACIA ARRIBA. SE AGREGA FLUIDO HIDRATANTE (35) AL PRIMER MIEMBRO DE COPA (11) Y SE SELLA UNA CUBIERTA (34) A LA PARTE SUPERIOR DEL PRIMER MIEMBRO DE COPA (11). Contact lens is cast by polymerising a monomer in a cavity between a male mould and a female mould. When the moulds are opened, the lens remains supported on the surface. Cover is sealed onto the flange to form a package. Lens is cast with the male mould (12) facing downwards and female mould, which has an annular wall and flange similar to the wall and flange (22), is fitted piston-like with the male mould. Cavity is sealed properly and that the moulds retract to take up shrinkage when the lens is polymerised in a pressure vessel at, e.g. 0.2-1 bar. Surface is flame polished to ensure that the lens remains attached to the male mould when the moulds separate. Male mould is then inverted to face upwards and form an open container. Saline fluid is poured into the container to hydrate and ease the lens from the mould. Finally a removable lid is applied to the flange.