Injection molding a lens onto a coated ophthalmic wafer

Details Injection molding a lens onto a coated ophthalmic wafer Injection molding a lens onto a coated ophthalmic wafer

2011-03-15

2011-03-15

Wollschlager, Jeffrey (Department: 1742)

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Composite or multiple layer

C264S001100, C264S001290, C264S001310, C264S001320, C264S001340, C264S001800, C264S002400, C264S002700, C264S513000, C264S255000, C264S259000, C264S265000, C264S338000, C427S135000, C427S162000

Reexamination Certificate

active

07906047

ABSTRACT:
A method of in-mold coating utilizing an injection molding machine oriented to a horizontal parting line. At the beginning of the cycle the mold opens and a charge of liquid coating solution is deposited onto the lower mold insert. A ophthalmic wafer is deposited on the coating to spread it across the insert surface. The mold is closed and a pre-cure phase elapses before the thermoplastic resin is injected into the mold cavity above the wafer. The process provides coated and functionally enhanced lenses upon ejection from the molding machine.

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