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1. WO2022162100 - BLOCKING PIECE AND METHOD FOR VACUUM BLOCKING A LENS BLANK

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Publication Number WO/2022/162100
Publication Date 04.08.2022
International Application No. PCT/EP2022/051964
International Filing Date 27.01.2022
IPC
B24B 9/14 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
24GRINDING; POLISHING
BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
9Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
02characterised by a special design with respect to properties of materials specific to articles to be ground
06of non-metallic inorganic material, e.g. stone, ceramics, porcelain
08of glass
14of optical work, e.g. lenses, prisms
B24B 13/005 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
24GRINDING; POLISHING
BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
13Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
005Blocking means, chucks or the like; Alignment devices
CPC
B24B 13/005
BPERFORMING OPERATIONS; TRANSPORTING
24GRINDING; POLISHING
BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING
13Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
005Blocking means, chucks or the like; Alignment devices
B24B 9/146
BPERFORMING OPERATIONS; TRANSPORTING
24GRINDING; POLISHING
BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING
9Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
02characterised by a special design with respect to properties of materials specific to articles to be ground
06of non-metallic inorganic material, e.g. stone, ceramics, porcelain
08of glass
14of optical work, e.g. lenses, prisms
146Accessories, e.g. lens mounting devices
Applicants
  • CARL ZEISS VISION INTERNATIONAL GMBH [DE]/[DE]
  • OPTOTECH OPTIKMASCHINEN GMBH [DE]/[DE]
Inventors
  • NOWAK, Gerd
  • HARTMANN, Wito
  • MANDLER, Roland
  • LACK, Oswin
Agents
  • TAUTZ & SCHUHMACHER
Priority Data
21154058.828.01.2021EP
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) BLOCKING PIECE AND METHOD FOR VACUUM BLOCKING A LENS BLANK
(FR) PIÈCE DE BLOCAGE ET PROCÉDÉ DE BLOCAGE SOUS VIDE D'UNE ÉBAUCHE DE LENTILLE
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Abstract
(EN) The invention relates to a blocking piece (10) for vacuum blocking a lens blank (30). The blocking piece (10) comprises a blank contacting element (12) formed of a rigid fluid-permeable material having an upper surface (12a) for contacting the lens blank (30). The blocking piece (10) further comprises a support element (14) having an upper part (14a) tightly enclosing the blank contacting element (12) on a peripheral surface (12a) of the blank contacting element (12) and a lower part (14b) adapted to engage with a clamping device for clamping the blocking piece (10). The blocking piece (10) is adapted to fixate the lens blank (30) to the upper surface (12a) of the blank contacting element (12) by applying a vacuum within the blocking piece (10) to provide a suction through essentially the entire upper surface (12a) of the blank contacting element (12) to suck the lens blank (30) to the upper surface (12a) of the blank contacting element (12). The invention further relates to a method for blocking a lens blank (30) and a use of an element formed of a rigid fluid-permeable material as a part of a blocking piece (10).
(FR) L'invention concerne une pièce de blocage (10) destinée au blocage sous vide d'une ébauche de lentille (30). La pièce de blocage (10) comprend un élément d'entrée en contact avec l'ébauche (12) formé d'un matériau rigide perméable aux fluides ayant une surface supérieure (12a) pour entrer en contact avec l'ébauche de lentille (30). La pièce de blocage (10) comprend en outre un élément de support (14) ayant une partie supérieure (14a) entourant étroitement l'élément d'entrée en contact avec l'ébauche (12) sur une surface périphérique (12a) de l'élément d'entrée en contact avec l'ébauche (12) et une partie inférieure (14b) conçue pour venir en prise avec un dispositif de serrage afin de serrer la pièce de blocage (10). La pièce de blocage (10) est conçue pour fixer l'ébauche de lentille (30) à la surface supérieure (12a) de l'élément d'entrée en contact avec l'ébauche (12) par application d'un vide à l'intérieur de la pièce de blocage (10) afin de fournir une aspiration à travers sensiblement toute la surface supérieure (12a) de l'élément d'entrée en contact avec l'ébauche (12) pour aspirer l'ébauche de lentille (30) vers la surface supérieure (12a) de l'élément d'entrée en contact avec l'ébauche (12). L'invention concerne en outre un procédé de blocage d'une ébauche de lentille (30) et une utilisation d'un élément formé d'un matériau rigide perméable aux fluides en tant que partie d'une pièce de blocage (10).
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