초록 ▼

An apparatus for preparing a plastic eyeglass lens includes a coating unit and a lens curing unit. The apparatus is preferably configured to allow the operation of both the coating unit and the lens curing unit. The apparatus may also include a post-cure unit and a controller. The controller is conf

An apparatus for preparing a plastic eyeglass lens includes a coating unit and a lens curing unit. The apparatus is preferably configured to allow the operation of both the coating unit and the lens curing unit. The apparatus may also include a post-cure unit and a controller. The controller is configured to control the operation of the coating unit, the lens curing unit and the post-cure unit. A lens forming composition may include an aromatic containing polyether polyethylenic functional monomer, a photoinitiator, and a coinitiator. The lens forming composition may be cured by the application of activating light or activating light and heat.

대표청구항 ▼

An apparatus for preparing a plastic eyeglass lens includes a coating unit and a lens curing unit. The apparatus is preferably configured to allow the operation of both the coating unit and the lens curing unit. The apparatus may also include a post-cure unit and a controller. The controller is conf

An apparatus for preparing a plastic eyeglass lens includes a coating unit and a lens curing unit. The apparatus is preferably configured to allow the operation of both the coating unit and the lens curing unit. The apparatus may also include a post-cure unit and a controller. The controller is configured to control the operation of the coating unit, the lens curing unit and the post-cure unit. A lens forming composition may include an aromatic containing polyether polyethylenic functional monomer, a photoinitiator, and a coinitiator. The lens forming composition may be cured by the application of activating light or activating light and heat. plate on which said cavity extensions are mounted and each said stripper plate being movable relative to said side, and said cavity plate comprises a first face on which said first cavities are mounted and a second face on which said second cavities are mounted, said turret being rotatable to simultaneously bring one of said at least two sides into alignment with said first face and the other of said at least two sides into alignment with said second face, said mold clamping unit inserting said cores on said first side into said first cavities on said first face and inserting cores on said second side into composite cavities formed by said extension elements and said second cavities on said second face. 6. An injection molding machine according to claim 4 wherein said cavity plate and said core plate are movable with respect to one another between a first position, wherein a first set of said plurality of cores are aligned with said plurality of first cavities and a second set of said plurality of cores are aligned with said plurality of second cavities, and a second position, wherein said first set of said plurality of cores are aligned with said plurality of second cavities and said second set of said plurality of cores are aligned with said plurality of first cavities. 7. An injection molding machine according to claim 6 wherein said core plate is rotatable relative to said cavity plate to move said core plate between said first and second positions. 8. An injection molding machine according to claim 1 wherein at least one of said first and second injection units performs a co-injection operation. 9. An injection molding machine according to claim 1 further comprising means to place an insert into said first cavity, prior to said mold clamping unit closing said mold by inserting said core into said first cavity. 10. An injection molding machine according to claim 1 further comprising means to place an insert into said composite cavity, prior to said mold clamping unit closing said mold by inserting said core into said composite cavity. 11. An injection molding machine according to claim 3 further comprising at least two pairs of sliders mounted to said stripper plate and operable to move laterally with respect to said cores, each slider in one said pair being connected to a respective one slider in each other pair by a tie rod, such that lateral movement of one slider results in corresponding lateral movement of said other respective slider. 12. An injection molding machine according to claim 11 wherein cooling fluid is circulated to said sliders through the tie rods. 13. An injection mold for producing over-molded articles comprising: a cavity plate having first and second cavities mounted thereon, said second cavity having a cavity depth less than the cavity depth of said first cavity; a core plate having a core mounted thereon, said core plate being movable relative to said cavity plate; a cavity extension comprising a pair of cavity elements located about said core, said cavity extension having a depth substantially equal to the difference between the cavity depths of said first cavity and said second cavity and defining a geometric configuration different from that of said first cavity; and cavity extension operating means on said core plate to move said pair of cavity elements between an open position wherein said core can be inserted into said first cavity between said pair of cavity elements and a closed position wherein said pair of cavity elements are combined with said second cavity to form a composite cavity which receives said core. 14. An injection mold according to claim 13 further comprising a stripper plate located between said core plate and said cavity plate when said mold is closed, said stripper plate being moveable with respect to said core plate and said cavity extension elements being mounted to said stripper plate to move therewith, said stripper plate operable to remove a molded article fr