公开(公告)号：US20200164555A1

公开(公告)日：2020-05-28

申请号：US16694317

申请日：2019-11-25

Applicant: Alcon Inc.

Inventor： Thomas Tonn ,  Jan Bernard ,  Halina Heidrich ,  Eduard Jetzlaff ,  Yasin Acikgoez ,  Maricel Teresa Repetto ,  Matthias Schwab

IPC: B29C45/04 ,  B29C45/40

Abstract: An injection molding apparatus for manufacturing an ophthalmic lens mold having a front surface comprising a lens forming portion and a rear surface, comprises a first molding tool and a second molding tool. The first and second molding tools are movable towards and away from each other between a closed position and an open position. In the closed position the first mold forming portion of the first molding tool and the second mold forming portion of the second molding tool define a cavity between them corresponding in shape to the shape of the ophthalmic lens mold. The surface of the second mold forming portion, at least in a central zone thereof, has a surface roughness Sa in the range of 0.3 μm to 2 μm, and a surface roughness Sz in the range of 10 μm to 50 μm.

公开(公告)号：US11794386B2

公开(公告)日：2023-10-24

申请号：US16694317

申请日：2019-11-25

Applicant: Alcon Inc.

Inventor： Thomas Tonn ,  Jan Bernard ,  Halina Heidrich ,  Eduard Jetzlaff ,  Yasin Acikgoez ,  Maricel Teresa Repetto ,  Matthias Schwab

IPC: B29C45/04 ,  B29C45/40 ,  B29K23/00 ,  B29L11/00

CPC classification number: B29C45/0416 ,  B29C45/4005 ,  B29K2023/12 ,  B29L2011/0041

Abstract: An injection molding apparatus for manufacturing an ophthalmic lens mold having a front surface comprising a lens forming portion and a rear surface, comprises a first molding tool and a second molding tool. The first and second molding tools are movable towards and away from each other between a closed position and an open position. In the closed position the first mold forming portion of the first molding tool and the second mold forming portion of the second molding tool define a cavity between them corresponding in shape to the shape of the ophthalmic lens mold. The surface of the second mold forming portion, at least in a central zone thereof, has a surface roughness Sa in the range of 0.3 μm to 2 μm, and a surface roughness Sz in the range of 10 μm to 50 μm.