Demolding and delensing methods and systems in the...

B - Operations – Transporting – 29 – D

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B29D 11/00 (2006.01)

Patent

CA 2618656

Methods and apparatus for separating mold sections, removing a lens product from the separated mold sections, and transferring the lens product to a processing tray are provided and include contacting assembled mold sections with a warm fluid to break fused portions between the mold sections, and using one or more wedge shaped elements to pry apart and separate the mold sections, one from the other. A vacuum head having multiple vacuum ports is employed for lifting the newly molded lens product from a mold section and for releasing the lens from the vacuum head into a processing tray. A cylinder of flowing air directed around the circumference of the lens is effective to maintain the lens in an unfolded position as the lens is being released into the processing tray. A tray set including multiple trays holding multiple lenses is provided and includes features for enabling visual and/or mechanical distinction of the trays and lenses held thereby.

L'invention concerne des méthodes et un appareil pour séparer des parties de moule, pour retirer un produit de lentille des parties de moules séparées, et pour transférer ce produit de lentille sur un plateau de traitement. Les méthodes de l'invention consistent à mettre en contact les parties de moule assemblées avec un fluide chaud, pour casser les parties fusionnées entre les parties de moule, et, à l'aide d'au moins un élément en forme de coin, écarter et séparer les parties de moule l'une de l'autre. Une tête sous vide présentant plusieurs ports sous vide est utilisée pour retirer le produit de lentille nouvellement moulé de la partie de moule et pour libérer la lentille de la tête sous vide pour la déposer dans un plateau de traitement. Un cylindre d'air en circulation dirigé autour de la circonférence de la lentille est efficace pour maintenir la lentille dans une position dépliée, alors que la lentille est en cours de libération dans le plateau de traitement. Un ensemble de plateaux comprenant plusieurs plateaux comportant plusieurs lentilles présente des caractéristiques permettant une distinction visuelle et/ou mécanique des plateaux et des lentilles se trouvant sur ce plateau.

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