公开(公告)号：US12083728B2

公开(公告)日：2024-09-10

申请号：US17652729

申请日：2022-02-28

Applicant: ALCON INC.

Inventor： Jan Bernard ,  Michael Stutz ,  Thomas Tonn

IPC: B29C45/84 ,  B29C45/14 ,  B29C45/26 ,  B29C45/80 ,  B29D11/00 ,  B29L11/00 ,  G02B21/00

CPC classification number: B29C45/842 ,  B29C45/14 ,  B29C45/2675 ,  B29C45/80 ,  B29D11/00951 ,  G02B21/0016 ,  B29C2945/76096 ,  B29C2945/76294 ,  B29C2945/76461 ,  B29C2945/76943 ,  B29D11/0048 ,  B29L2011/0041

Abstract: To achieve molding insert is properly mounted to the tooling plate of the injection molding machine, a sensor head comprising confocal sensors is used. The sensor heads are placed on the tooling plate at the respective position to determine whether the desired mold insert has been mounted to that position and whether the desired mold insert has been precisely and accurately mounted to the tooling plate.

公开(公告)号：US20220152958A1

公开(公告)日：2022-05-19

申请号：US17455139

申请日：2021-11-16

Applicant: ALCON INC.

Inventor： Michael Stutz ,  Jan Bernard ,  Giovanni Campanelli ,  Lukas Lomb ,  Matthias Schwab

IPC: B29D11/00

Abstract: A mold unit (22) for molding ophthalmic lenses comprises: an adapter piece (220) comprising an opening (2200) extending around a longitudinal axis (2201); a sleeve (221) fixedly connected to the adapter piece (220) and extending through the opening (2200) of the adapter piece (220); a lens mold (222) rigidly mounted to the sleeve (221); an adjustment ring (224) firmly attached to the sleeve (221) to circumferentially surround a portion of the sleeve (221). The adjustment ring (224) comprises a flat circular outer engagement surface (2244), and the adapter piece (220) comprises at least one clamping block (2211) having a flat inner clamping surface (2214). The flat inner clamping surface (2214) frictionally clamps the flat circular outer engagement surface (2244) to prevent inadvertent rotation of the sleeve (221) relative to the adapter piece (220) but to allow rotation of the sleeve (221) relative to the adapter piece (220) upon the application of a torque higher than a predetermined threshold torque.

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.

公开(公告)号：US12083756B2

公开(公告)日：2024-09-10

申请号：US17398280

申请日：2021-08-10

Applicant: ALCON INC.

Inventor： Matthias Schwab ,  Udo Schuessler ,  Steffen Lieb ,  Eduard Jetzlaff ,  Jan Bernard ,  Halina Heidrich ,  Thomas Tonn

IPC: B29D11/00 ,  B25J15/00 ,  B25J15/06 ,  B29C31/00 ,  B29C33/30 ,  B29L11/00

CPC classification number: B29D11/00538 ,  B25J15/0047 ,  B25J15/0616 ,  B29C31/006 ,  B29C33/303 ,  B29D11/00019 ,  B29D11/00173 ,  B29D11/0023 ,  B29D11/00509 ,  B29D11/00528 ,  B29L2011/0016 ,  B29L2011/0025 ,  B29L2011/0041

Abstract: A method of providing a male mold half for molding a toric contact lens at a predetermined target rotational orientation is disclosed. The method comprises the steps of: —providing the male mold half at a predetermined rotational orientation, —picking the male mold half up with a gripper having a central axis, —rotating the gripper with the male mold half about the central axis of the gripper by a predetermined rotational angle (α) towards the predetermined target rotational orientation, and —releasing the rotated male mold half from the gripper. Prior to picking the male mold half up, the method comprises centering the grippe and the male mold half relative to each other such that the central axis of the gripper and a central axis of the male mold half coincide.

公开(公告)号：US20220274307A1

公开(公告)日：2022-09-01

申请号：US17652729

申请日：2022-02-28

Applicant: ALCON INC.

Inventor： Jan Bernard ,  Michael Stutz ,  Thomas Tonn

IPC: B29C45/84 ,  B29C45/14 ,  B29C45/80

Abstract: A method for verifying whether a molding insert (1a, 1b) is accurately mounted to a tooling plate (2a, 2b) comprises the steps of: a) providing a confocal sensor (3a, 3b); b) arranging the confocal sensor (3a, 3b) such that a confocal sensor reference plane (32a, 32b) as well as a tooling plate reference plane (22a, 22b) are normal to a mounting axis (21a, 21b) of the tooling plate and spaced from each other by a predetermined first distance (d1, e1); c) measuring a second distance (d2, e2) between the confocal sensor reference plane (32a, 32b) and a central impingement location (11a, 11b) on a molding surface (12a, 12b) of the molding insert (1a, 1b); d) based on the measured second distance (d2, e2) as well as based on the predetermined first distance (d1, e1), determining a third distance (d3, e3) of the central impingement location (11a, 11b) relative to the tooling plate reference plane (22a, 22b); e) comparing the third distance (d3, e3) with a predetermined target distance, and f) determining that the molding insert (1a, 1b) is accurately mounted to the tooling plate (2a, 2b) if the difference between the third distance (d3, e3) and the predetermined target distance is less than a threshold difference.

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.