EP2455188B1 - Method and device for blocking a lens - Google Patents

Method and device for blocking a lens Download PDF

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Publication number
EP2455188B1
EP2455188B1 EP10015216.4A EP10015216A EP2455188B1 EP 2455188 B1 EP2455188 B1 EP 2455188B1 EP 10015216 A EP10015216 A EP 10015216A EP 2455188 B1 EP2455188 B1 EP 2455188B1
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EP
European Patent Office
Prior art keywords
lens
block
limiting means
block piece
expelling
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EP10015216.4A
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German (de)
French (fr)
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EP2455188A1 (en
Inventor
Gunter Schneider
Ferdinand Achenbach
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Schneider GmbH and Co KG
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Schneider GmbH and Co KG
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Priority to EP10015216.4A priority Critical patent/EP2455188B1/en
Publication of EP2455188A1 publication Critical patent/EP2455188A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/005—Blocking means, chucks or the like; Alignment devices
    • B24B13/0052—Lens block moulding devices

Definitions

  • the present invention relates to an apparatus for blocking an optical lens according to the preamble of claim 1 and a method for blocking an optical lens according to the preamble of claim 7.
  • An optical lens for example for glasses, should have certain optical properties.
  • the associated desired optical data of the lens are determined, for example, by an optometrist. These data include, for example, the indication of diopters, data on sphere and cylinder, the pantoscopic angle, etc. Furthermore, these desired optical data and the distance and / or the location to an associated eye, especially when installed in a specific eyeglass frame, ie z , As the pantoscopic angle, face shape angle or frame disc angle, pupil distance, etc. included.
  • lenses were used with predetermined optical data, such as diopters available at various levels. Increasingly, however, lenses are used which have the respectively desired, individualized optical data or the associated optical properties. Such lenses are then machined or fabricated depending on the respectively desired optical data, the lenses being machined, preferably by turning and / or milling. For this purpose, the lenses are clamped, which are initially blocked, as explained below.
  • the WO 2011/054665 A1 which is to be considered only in novelty, discloses a method for releasing a lens blocked by a thermoplastic block material.
  • the lens is released from the associated block piece by applying a force to the thermoplastic block material.
  • the EP 2 255 925 A1 which is to be considered only in terms of novelty, discloses a method for blocking a lens and a corresponding device, wherein for blocking differently sized lenses linearly displaceable ring segments are provided with different sized bearing surfaces for the lens.
  • the GB 2 281 525 A which forms the closest prior art for the subject matter of claims 1 and 7, and discloses an apparatus for blocking a lens.
  • the apparatus includes an actuator having a vertically movable slide bar movable between an extended position and a retracted position. The actuator or the slide bar engages the middle of the block piece.
  • the US 3,091,062 A discloses a device for deblocking a lens. After insertion of the blocked lens into the device, a force is manually exerted on the lens via a lever arm, so that this from that in the device separates clamped block piece.
  • the block piece can be ejected separately via a spring after separation from the lens.
  • the DE 10 2008 022 660 A1 discloses a method of processing a lens wherein the lens to be processed is temporarily mounted (blocked) on a so-called block piece as a holder.
  • the block piece When blocking the lens is in particular connected by means of a block material with the block piece. Subsequently, the block piece is ejected by means of a centrally acting ejector. The block piece can then be clamped to work the lens.
  • the present invention relates to the blocking of a lens.
  • blocking is meant the temporary bonding of the lens to an associated block piece, in particular by means of a block material.
  • the block piece thus forms in particular a holder, particularly preferred for later processing of the lens.
  • the present invention has for its object to provide an apparatus and a method for blocking an optical lens, wherein the output of the blocked lens and in particular the release of a blocking means, such as a block ring, simplified or facilitated.
  • One aspect of the present invention resides in that an ejection device acts off-center on a blocked lens indirectly or at least one ejection pulse is exerted off-center on the blocked lens indirectly. In this way, a release of the blocked lens together with the associated block piece or from a device according to the proposal can be achieved, facilitated or supported.
  • the ejector or the ejection pulse acts only indirectly on the lens, on a limiting means for the lens with the block piece connecting block material.
  • the limiting means is in particular a block ring or the like. In this way, a release of the limiting means or block ring can be achieved, facilitated or supported by the blocked lens or the block material.
  • a sequence of ejection pulses is preferably generated which act directly or indirectly on the blocked lens.
  • a vibration or vibration is generated.
  • the release of the blocked lens from or from the blocking device may be achieved, facilitated, or assisted.
  • the loosening or loosening of the limiting means Block or ring of the blocked lens or the block material can be achieved or supported.
  • the ejector force is preferably generated by an ejector device which can be actuated separately from the ejection device.
  • the release and / or ejection preferably takes place by attacking at least one ejection pulse and / or one ejector force in different areas or at different locations. Particularly preferably, both an ejection device and an ejector device are provided. Thus, a release and removal of the blocked lens together with the associated block piece much easier or supported.
  • the proposed solution as well as the mentioned and following aspects of the present invention each allow an improved release and / or removal of the blocked lens, especially if a block material is used for blocking, which adheres or adheres particularly well, in particular stronger than previously commonly used alloys.
  • the figure shows in a very schematic section a proposed device 1 for blocking an optical lens 2.
  • the blocking (temporary joining or fastening) of the lens 2 takes place in particular in order to enable a (later) processing of the line 2.
  • the starting point for the creation or processing of an optical lens 2 is a lens blank. This is machined or in other shaping processing and processed in further processing steps so that the end is a finished optical lens 2 with the desired optical properties.
  • the term "lens" in the context of the present description preferably designates both the lens blank before the necessary processing steps are carried out and at the end the finished lens 2.
  • the lens 2 or the lens blank is preferably made of plastic. However, in principle, any other suitable material to be processed, possibly also glass or mineral glass, can be used. When the finished lens 2 is to be used for a pair of glasses (not shown), which is preferably the case, the lens 2 is also referred to as a spectacle lens in the present invention, even if the lens 2 may not be made of glass.
  • the device 1 is designed to block or connect the lens 2 to an associated block piece 3.
  • the lens 2 is already connected to the block piece 3.
  • This condition associated with the block piece 3 is also referred to as "blocked".
  • the blocking, ie temporary fixing, of the lens 2 on the block piece 3 is preferably effected by a block material 4, in particular a preferably low-temperature melting alloy, such as so-called alloy block material, a resin, an adhesive, a plastic, an adhesive strip or the like.
  • the device 1 for blocking the lens 2, in the illustrated example, preferably has a bearing part 5 for receiving or supporting the block piece 3.
  • the bearing part 5 is preferably pivotally mounted like a dome, in the illustrated example, in particular in or on a preferably dome-like mounting 6 of the device 1.
  • other constructive solutions are possible,
  • the block 2 to be blocked with the lens 2 is held at least partially spaced from the block piece 3 of the device 1, so that the block material 4 fill a gap between the lens 2 and the block piece 3 and thereby connect these two together.
  • This space for the block material 4 is surrounded by a limiting means of the device 1, in particular to prevent unwanted flow of the initially liquid block material 4 from the gap.
  • Said limiting means is preferably at least substantially annular and in particular formed by a block ring 7.
  • the block ring 7 is preferably at least substantially annular disc-like or flange-shaped.
  • the limiting means or the block ring 7 preferably forms a support for the lens 2.
  • the limiting means or the block ring 7 is circumferentially on the lens 2 and / or on the device 1 or storage 6 or a subsequent plate area.
  • the limiting means or the block ring 7 preferably seals off between the lens 2 on the one hand and the device 1 on the other hand so that the preferably initially liquid block material 4, at least during filling, can not escape.
  • the device 1 or the limiting means or the block ring 7 preferably has a corresponding filling opening 7A for the block material 4.
  • this filling opening 7A may, for example, also be formed in the block piece 3 or through the block piece 3.
  • the filling opening 7A is preferably at the top or in an upper area, so that the air can escape during the filling of the block material 4.
  • the device 1 or the bearing part 5, the bearing 6 and / or the block piece 3 can be cooled if necessary, in order to achieve a preferably rapid or faster cooling and thus solidification of the block material 4.
  • the block piece 3 serves in particular as a holder of the lens 2 for a subsequent processing of the lens 2.
  • a receptacle not shown, such as a chuck or the like, clamped, for example, in a workpiece spindle, then the cutting or other shaping processing of the lens 2, in particular by turning and / or milling done.
  • the blocked lens 2 that is to say the lens 2 connected to the block piece 3, forms a unit which is also referred to below as "block" for short.
  • the block piece 3 must be released from the device 1 or its bearing part 5 and also the blocked lens 2 or the block material 4 or the block must be released from the limiting means or block ring 7.
  • the limiting means or the block ring 7 can be placed loosely on the device 1 or around the bearing 6, wherein the device 1 or bearing 6 on the one hand and the limiting means or the block ring 7 on the other hand are preferably formed such that a corresponding coaxial Positioning is achieved or ensured in particular by corresponding axial engagement and / or radial engagement or in any other way.
  • the device 1 comprises an ejector 8 for releasing or assisting the release of the lens 2 blocked by the block piece 3 from the device 1 and / or the limiting means or block ring 7.
  • the ejector 8 attacks off-center on the lens 2 indirectly.
  • At least one ejection pulse, as indicated by arrow A, is produced, which acts off-center on the blocked lens 2 indirectly.
  • the ejector 8 preferably has a plunger 9, which is correspondingly movable, preferably pneumatically or by compressed air, in particular against the force of a return spring, by a double-acting cylinder arrangement or the like.
  • the ejector 8 is thus preferably pneumatically driven or actuated.
  • the ejector 8 or the ejection pulse A acts off-center on the lens 2 indirectly.
  • the ejection device 8 or its plunger 9 or the ejection pulse A directly engages the limiting means or the block ring 7, particularly preferably on the side facing away from the lens 2 Side or in the ejection and / or removal direction.
  • the ejection, impulse and / or removal direction preferably extends transversely, in particular perpendicularly, to the end face of the block piece 3 facing the lens 2 and / or to the side of the lens 2 or a main plane of the lens 2 facing the block piece 3.
  • the said direction preferably extends at least substantially parallel to a clamping or rotational axis of the block piece 3 during a subsequent machining of the lens 2. This axis corresponds to the machining axis B indicated in the figure.
  • the ejection device 8 thus acts directly on the limiting means for the lens 2 or the block ring 7, in order to loosen or release the limiting means or the block ring 7 from the lens 2 blocked by the block piece 3 or from the block material 4.
  • the ejection device 8 or the ejection pulse A preferably engages radially outside the lens 2 on the limiting means or block ring 7 extending radially correspondingly far outward.
  • vibrations or oscillations can thus be generated in a very advantageous manner, which effect or at least support the desired release of the lens 2 or of the block from the device 1 and / or the limiting means or block ring 7 from the block or block material 4.
  • the limiting means or the block ring 7 is preferably formed at least substantially dimensionally stable or rigid and / or particularly preferably made of metal.
  • the ejection device 8 or its plunger 9 or the ejection pulse A preferably exerts a tilting moment on the lens 2, the block, the block piece 3 and / or the limiting means or the block ring 7.
  • the ejector 8 or the ejection pulse A preferably causes a lifting of the blocked lens 2 and the block.
  • a plurality of ejection pulses A or a series of ejection pulses A and / or vibrating or oscillating, in particular of the limiting means or block ring 7, can be produced.
  • the ejector 8 is designed to generate a plurality of ejection pulses A and, a sequence of ejection pulses A and / or actuated.
  • the plurality of ejection pulses A or a sequence of ejection pulses A can basically act or be exerted indirectly on the blocked lens 2 or the block in the sense of the invention, but this takes place off-center and indirectly via the limiting means or the block ring 7.
  • the device 1 preferably has, in addition to the ejection device 8, an ejection device 10, in addition to exerting an ejector force, as indicated by arrow K in the figure, on the block piece 3 and / or centrally on the blocked lens 2 or the block.
  • the ejector device 10 preferably has a plunger 11, which can be moved back and forth accordingly, in particular linearly.
  • the ejector device 10 or its plunger 11 is pneumatically movable or actuated, for example, against the force of a Return spring and / or by a double-acting cylinder or the like.
  • the ejection device 8 and / or the ejector device 10 can also be driven or actuated electrically or electromagnetically as required.
  • the direction of the ejector force K or direction of movement of the plunger 11 preferably runs at least substantially parallel to the ejection pulse A and / or at least substantially parallel to or along the machining axis B.
  • the ejection device 10 or ejector force K is preferably exerted on the blocked lens 2 or the block or block piece 3, in particular by a central recess in the device 1 or in its bearing part 5, from the side facing away from the lens 2.
  • a central recess in the device 1 or in its bearing part 5 from the side facing away from the lens 2.
  • At least one ejection pulse A and then subsequently the ejector force K are exerted.
  • the ejection device 8 is therefore preferably actuated first or in front of the ejector device 10.
  • the two devices 8 and 10 if necessary, also be operated or operated simultaneously.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Description

Die vorliegende Erfindung betrifft eine Vorrichtung zum Blocken einer optischen Linse gemäß dem Oberbegriff des Anspruchs 1 sowie ein Verfahren zum Blocken einer optischen Linse gemäß dem Oberbegriff das Anspruchs 7.The present invention relates to an apparatus for blocking an optical lens according to the preamble of claim 1 and a method for blocking an optical lens according to the preamble of claim 7.

Eine optische Linse, beispielsweise für eine Brille, soll bestimmte optische Eigenschaften aufweisen. Die damit einhergehenden gewünschten optischen Daten der Linse werden beispielsweise von einem Augenoptiker bestimmt. Diese Daten umfassen zum Beispiel die Angabe der Dioptrien, Daten zu Sphäre und Zylinder, zum pantoskopischen Winkel etc. Weiter können diese gewünschten optischen Daten auch den Abstand und/oder die Lage zu einem zugeordneten Auge, insbesondere bei Einbau in ein bestimmtes Brillengestell, also z. B. den pantoskopischen Winkel, Gesichtsformwinkel bzw. Fassungsscheibenwinkel, Pupillenabstand, etc. enthalten.An optical lens, for example for glasses, should have certain optical properties. The associated desired optical data of the lens are determined, for example, by an optometrist. These data include, for example, the indication of diopters, data on sphere and cylinder, the pantoscopic angle, etc. Furthermore, these desired optical data and the distance and / or the location to an associated eye, especially when installed in a specific eyeglass frame, ie z , As the pantoscopic angle, face shape angle or frame disc angle, pupil distance, etc. included.

Früher wurden Linsen mit vorbestimmten optischen Daten, beispielsweise mit in verschiedenen Stufen erhältlichen Dioptrien, eingesetzt. Zunehmend werden jedoch Linsen eingesetzt, die die jeweils gewünschten, individualisierten optischen Daten bzw. die damit einhergehenden optischen Eigenschaften aufweisen. Derartige Linsen werden dann in Abhängigkeit von den jeweils gewünschten optischen Daten bearbeitet bzw. gefertigt, wobei die Linsen insbesondere spanend, vorzugsweise durch Drehen und/oder Fräsen, bearbeitet werden. Hierzu werden die Linsen eingespannt, wobei diese zunächst geblockt werden, wie nachfolgend erläutert.Previously, lenses were used with predetermined optical data, such as diopters available at various levels. Increasingly, however, lenses are used which have the respectively desired, individualized optical data or the associated optical properties. Such lenses are then machined or fabricated depending on the respectively desired optical data, the lenses being machined, preferably by turning and / or milling. For this purpose, the lenses are clamped, which are initially blocked, as explained below.

Die WO 2011/054665 A1 , die lediglich hinsichtlich der Neuheit zu berücksichtigen ist, offenbart ein Verfahren zum Lösen einer mittels eines thermoplastischen Blockmaterials geblockten Linse. Die Linse wird vom zugeordneten Blockstück gelöst, indem eine Kraft auf das thermoplastische Blockmaterial ausgeübt wird.The WO 2011/054665 A1 , which is to be considered only in novelty, discloses a method for releasing a lens blocked by a thermoplastic block material. The lens is released from the associated block piece by applying a force to the thermoplastic block material.

Die EP 2 255 925 A1 , die lediglich hinsichtlich der Neuheit zu berücksichtigen ist, offenbart ein Verfahren zum Blocken einer Linse und eine entsprechende Vorrichtung, wobei zum Blocken unterschiedlich großer Linsen linear verschiebbare Ringsegmente mit unterschiedlich großen Auflageflächen für die Linse bereitgestellt werden.The EP 2 255 925 A1 , which is to be considered only in terms of novelty, discloses a method for blocking a lens and a corresponding device, wherein for blocking differently sized lenses linearly displaceable ring segments are provided with different sized bearing surfaces for the lens.

Die GB 2 281 525 A , bildet den nächstliegenden Stand der Technik für den Gegenstand der Ansprüche 1 und 7, und offenbart eine Vorrichtung zum Blocken einer Linse. Die Vorrichtung weist einen Aktuator mit einer vertikal bewegbaren Gleitstange auf, die zwischen einer ausgefahrenen Position und einer eingefahrenen Position bewegbar ist. Der Aktuator bzw. die Gleitstange greift mittig am Blockstück an.The GB 2 281 525 A , which forms the closest prior art for the subject matter of claims 1 and 7, and discloses an apparatus for blocking a lens. The apparatus includes an actuator having a vertically movable slide bar movable between an extended position and a retracted position. The actuator or the slide bar engages the middle of the block piece.

Die US 3,091,062 A offenbart eine Vorrichtung zum Deblocken einer Linse. Nach Einsetzen der geblockten Linse in die Vorrichtung wird über einen Hebelarm manuell eine Kraft auf die Linse ausgeübt, so dass sich diese von dem in der Vorrichtung eingespannten Blockstück trennt. Das Blockstück kann nach dem Trennen von der Linse separat über eine Feder ausgeworfen werden.The US 3,091,062 A discloses a device for deblocking a lens. After insertion of the blocked lens into the device, a force is manually exerted on the lens via a lever arm, so that this from that in the device separates clamped block piece. The block piece can be ejected separately via a spring after separation from the lens.

Die DE 10 2008 022 660 A1 offenbart ein Verfahren zum Bearbeiten einer Linse, wobei die zu bearbeitende Linse auf einem so genannten Blockstück als Halter temporär befestigt (geblockt) wird. Beim Blocken wird die Linse insbesondere mittels eines Blockmaterials mit dem Blockstück verbunden. Anschließend wird das Blockstück mittels eines zentral angreifenden Ausstoßers ausgestoßen. Das Blockstück kann dann eingespannt werden, um die Linse zu bearbeiten.The DE 10 2008 022 660 A1 discloses a method of processing a lens wherein the lens to be processed is temporarily mounted (blocked) on a so-called block piece as a holder. When blocking the lens is in particular connected by means of a block material with the block piece. Subsequently, the block piece is ejected by means of a centrally acting ejector. The block piece can then be clamped to work the lens.

Die vorliegende Erfindung betrifft das Blocken einer Linse. Unter dem "Blocken" ist das temporäre Verbinden der Linse mit einem zugeordneten Blockstück, insbesondere mittels eines Blockmaterials, zu verstehen. Das Blockstück bildet also insbesondere einen Halter, besonders bevorzugt für eine spätere Bearbeitung der Linse.The present invention relates to the blocking of a lens. By "blocking" is meant the temporary bonding of the lens to an associated block piece, in particular by means of a block material. The block piece thus forms in particular a holder, particularly preferred for later processing of the lens.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung und ein Verfahren zum Blocken einer optischen Linse anzugeben, wobei das Ausgeben der geblockten Linse und insbesondere das Lösen von einem Blockmittel, wie einem Blockring, vereinfacht bzw. erleichtert werden.The present invention has for its object to provide an apparatus and a method for blocking an optical lens, wherein the output of the blocked lens and in particular the release of a blocking means, such as a block ring, simplified or facilitated.

Die obige Aufgabe wird durch eine Vorrichtung gemäß Anspruch 1 oder durch ein Verfahren gemäß Anspruch 7 gelöst. Vorteilhafte Weiterbildungen sind Gegenstand der Unteransprüche.The above object is achieved by a device according to claim 1 or by a method according to claim 7. Advantageous developments are the subject of the dependent claims.

Ein Aspekt der vorliegenden Erfindung liegt darin, dass eine Ausstoßeinrichtung außermittig an einer geblockten Linse mittelbar angreift bzw. mindestens ein Ausstoßimpuls außermittig auf die geblockte Linse mittelbar ausgeübt wird. Hierdurch kann ein Lösen der geblockten Linse zusammen mit dem zugeordneten Blockstück bzw. aus einer vorschlagsgemäßen Vorrichtung erreicht, erleichtert oder unterstützt werden.One aspect of the present invention resides in that an ejection device acts off-center on a blocked lens indirectly or at least one ejection pulse is exerted off-center on the blocked lens indirectly. In this way, a release of the blocked lens together with the associated block piece or from a device according to the proposal can be achieved, facilitated or supported.

Die Ausstoßeinrichtung bzw. der Ausstoßimpuls wirkt nur mittelbar auf die Linse, auf ein Begrenzungsmittel für die Linse mit dem Blockstück verbindendes Blockmaterial. Bei dem Begrenzungsmittel handelt es sich insbesondere um einen Blockring oder dergleichen. Hierdurch kann ein Lösen des Begrenzungsmittels bzw. Blockrings von der geblockten Linse bzw. dem Blockmaterial erreicht, erleichtert oder unterstützt werden.The ejector or the ejection pulse acts only indirectly on the lens, on a limiting means for the lens with the block piece connecting block material. The limiting means is in particular a block ring or the like. In this way, a release of the limiting means or block ring can be achieved, facilitated or supported by the blocked lens or the block material.

Es wird vorzugsweise eine Folge von Ausstoßimpulsen erzeugt, die mittelbar oder unmittelbar auf die geblockte Linse wirken. Hierdurch wird insbesondere ein Vibrieren oder Schwingen erzeugt. So kann wiederum das Lösen der geblockten Linse von oder aus der Vorrichtung zum Blocken erreicht, erleichtert oder unterstützt werden. Insbesondere kann so das Lockern oder Lösen des Begrenzungsmittels bzw. Blockrings von der geblockten Linse bzw. dem Blockmaterial erreicht oder unterstützt werden.A sequence of ejection pulses is preferably generated which act directly or indirectly on the blocked lens. As a result, in particular a vibration or vibration is generated. Thus, in turn, the release of the blocked lens from or from the blocking device may be achieved, facilitated, or assisted. In particular, so can the loosening or loosening of the limiting means Block or ring of the blocked lens or the block material can be achieved or supported.

Es wird vorzugsweise zusätzlich zu dem Ausstoßimpuls auch eine Auswerferkraft auf das Blockstück, insbesondere zentral, ausgeübt. Die Auswerferkraft wird vorzugsweise durch eine separat von der Ausstoßeinrichtung betätigbare Auswerfereinrichtung erzeugt. So wird ein Lösen und Entnehmen der geblockten Linse zusammen mit dem zugeordneten Blockstück wesentlich erleichtert oder unterstützt.It is preferably in addition to the ejection pulse and an ejector force on the block piece, in particular centrally exerted. The ejector force is preferably generated by an ejector device which can be actuated separately from the ejection device. Thus, a release and removal of the blocked lens together with the associated block piece much easier or supported.

Vorzugsweise erfolgt das Lösen und/oder Auswerfen durch Angriff mindestens eines Ausstoßimpulses und/oder einer Auswerferkraft in verschiedenen Bereichen oder an verschiedenen Stellen. Besonders bevorzugt sind sowohl eine Ausstoßeinrichtung als auch eine Auswerfereinrichtung vorgesehen. So wird ein Lösen und Entnehmen der geblockten Linse zusammen mit dem zugeordneten Blockstück wesentlich erleichtert oder unterstützt.The release and / or ejection preferably takes place by attacking at least one ejection pulse and / or one ejector force in different areas or at different locations. Particularly preferably, both an ejection device and an ejector device are provided. Thus, a release and removal of the blocked lens together with the associated block piece much easier or supported.

Die vorschlagsgemäße Lösung sowie die genannten und nachfolgenden Aspekte der vorliegenden Erfindung gestatten jeweils ein verbessertes Lösen und/oder Entnehmen der geblockten Linse, insbesondere auch wenn zum Blocken ein Blockmaterial eingesetzt wird, das besonders gut klebt oder haftet, insbesondere stärker als bisher üblicherweise verwendete Legierungen.The proposed solution as well as the mentioned and following aspects of the present invention each allow an improved release and / or removal of the blocked lens, especially if a block material is used for blocking, which adheres or adheres particularly well, in particular stronger than previously commonly used alloys.

Weitere Aspekte, Merkmale, Vorteile und Eigenschaften der vorliegenden Erfindung ergeben sich aus den Ansprüchen und der nachfolgenden Beschreibung eines bevorzugten Ausführungsbeispiels anhand der Zeichnung. Die einzige Figur zeigt:
eine schematische Ansicht einer vorschlagsgemäßen Vorrichtung mit einer geblockten Linse.Other aspects, features, advantages and features of the present invention will become apparent from the claims and the following description of a preferred embodiment with reference to the drawings. The only figure shows:
a schematic view of a proposed device with a blocked lens.

Die Figur zeigt in einem sehr schematischen Schnitt eine vorschlagsgemäße Vorrichtung 1 zum Blocken einer optischen Linse 2. Das Blocken (temporäres Verbinden oder Befestigen) der Linse 2 erfolgt insbesondere, um eine (spätere) Bearbeitung der Line 2 zu ermöglichen.The figure shows in a very schematic section a proposed device 1 for blocking an optical lens 2. The blocking (temporary joining or fastening) of the lens 2 takes place in particular in order to enable a (later) processing of the line 2.

Ausgangspunkt für die Entstehung bzw. Bearbeitung einer optischen Linse 2 ist ein Linsenrohling. Dieser wird spanend oder in einer sonstigen formgebenden Bearbeitung und in weiteren Bearbeitungsschritten so bearbeitet, dass am Ende eine fertige optische Linse 2 mit den gewünschten optischen Eigenschaften steht. Der Begriff "Linse" bezeichnet im Rahmen der vorliegenden Beschreibung vorzugsweise sowohl den Linsenrohling vor Durchführung der notwendigen Bearbeitungsschritte, als auch am Ende die fertige Linse 2.The starting point for the creation or processing of an optical lens 2 is a lens blank. This is machined or in other shaping processing and processed in further processing steps so that the end is a finished optical lens 2 with the desired optical properties. The term "lens" in the context of the present description preferably designates both the lens blank before the necessary processing steps are carried out and at the end the finished lens 2.

Die Linse 2 bzw. der Linsenrohling besteht vorzugsweise aus Kunststoff. Jedoch kann grundsätzlich auch ein sonstiger in geeigneter Weise zu bearbeitender Werkstoff, ggf. auch Glas bzw. Mineralglas, verwendet werden. Wenn die fertige Linse 2 für eine Brille (nicht dargestellt) eingesetzt bzw. verwendet werden soll, was vorzugsweise der Fall ist, wird die Linse 2 bei der vorliegenden Erfindung auch als Brillenglas bezeichnet, selbst wenn die Linse 2 gegebenenfalls nicht aus Glas besteht.The lens 2 or the lens blank is preferably made of plastic. However, in principle, any other suitable material to be processed, possibly also glass or mineral glass, can be used. When the finished lens 2 is to be used for a pair of glasses (not shown), which is preferably the case, the lens 2 is also referred to as a spectacle lens in the present invention, even if the lens 2 may not be made of glass.

Die Vorrichtung 1 ist zum Blocken bzw. zum Verbinden der Linse 2 mit einem zugeordneten Blockstück 3 augebildet.The device 1 is designed to block or connect the lens 2 to an associated block piece 3.

In dem schematischen Schnitt ist die Linse 2 bereits mit dem Blockstück 3 verbunden. Dieser mit dem Blockstück 3 verbundene Zustand wird auch als "geblockt" bezeichnet. Das Blocken, also temporäre Befestigen, der Linse 2 am Blockstück 3 erfolgt vorzugsweise durch ein Blockmaterial 4, insbesondere eine vorzugsweise bei niedriger Temperatur schmelzende Legierung, wie sogenanntes Alloy-Blockmaterial, ein Harz, einen Klebstoff, einen Kunststoff, einen Klebestreifen oder dergleichen.In the schematic section, the lens 2 is already connected to the block piece 3. This condition associated with the block piece 3 is also referred to as "blocked". The blocking, ie temporary fixing, of the lens 2 on the block piece 3 is preferably effected by a block material 4, in particular a preferably low-temperature melting alloy, such as so-called alloy block material, a resin, an adhesive, a plastic, an adhesive strip or the like.

Die Vorrichtung 1 zum Blocken der Linse 2 weist beim Darstellungsbeispiel vorzugsweise ein Lagerteil 5 zur Aufnahme bzw. Lagerung des Blockstücks 3 auf. Das Lagerteil 5 ist vorzugsweise kalottenartig schwenkbar gelagert, beim Darstellungsbeispiel insbesondere in oder an einer vorzugsweise kalottenartigen Lagerung 6 der Vorrichtung 1. Jedoch sind auch andere konstruktive Lösungen möglich,The device 1 for blocking the lens 2, in the illustrated example, preferably has a bearing part 5 for receiving or supporting the block piece 3. The bearing part 5 is preferably pivotally mounted like a dome, in the illustrated example, in particular in or on a preferably dome-like mounting 6 of the device 1. However, other constructive solutions are possible,

Die mit dem Blockstück 3 zu verblockende Linse 2 wird zumindest bereichsweise beabstandet zu dem Blockstück 3 von der Vorrichtung 1 gehalten, so dass das Blockmaterial 4 eine Zwischenraum zwischen der Linse 2 und dem Blockstück 3 ausfüllen und dadurch diese beiden miteinander verbinden kann. Dieser Zwischenraum für das Blockmaterial 4 ist von einem Begrenzungsmittel der Vorrichtung 1 umgeben, insbesondere um ein unerwünschtes Abfließen des zunächst flüssigen Blockmaterials 4 aus dem Zwischenraum zu verhindern. Das genannte Begrenzungsmittel ist vorzugsweise zumindest im Wesentlichen ringartig ausgebildet und insbesondere durch einen Blockring 7 gebildet. Der Blockring 7 ist vorzugsweise zumindest im Wesentlichen ringscheibenartig oder flanschartig ausgebildet.The block 2 to be blocked with the lens 2 is held at least partially spaced from the block piece 3 of the device 1, so that the block material 4 fill a gap between the lens 2 and the block piece 3 and thereby connect these two together. This space for the block material 4 is surrounded by a limiting means of the device 1, in particular to prevent unwanted flow of the initially liquid block material 4 from the gap. Said limiting means is preferably at least substantially annular and in particular formed by a block ring 7. The block ring 7 is preferably at least substantially annular disc-like or flange-shaped.

Das Begrenzungsmittel bzw. der Blockring 7 bildet vorzugsweise ein Auflager für die Linse 2. Insbesondere liegt das Begrenzungsmittel bzw. der Blockring 7 umlaufend an der Linse 2 an und/oder auf der Vorrichtung 1 bzw. Lagerung 6 bzw. einem sich anschließenden Plattenbereich auf.The limiting means or the block ring 7 preferably forms a support for the lens 2. In particular, the limiting means or the block ring 7 is circumferentially on the lens 2 and / or on the device 1 or storage 6 or a subsequent plate area.

Das Begrenzungsmittel bzw. der Blockring 7 dichtet vorzugsweise zwischen der Linse 2 einerseits und der Vorrichtung 1 andererseits ab, so dass das zumindest beim Einfüllen vorzugsweise zunächst flüssige Blockmaterial 4 nicht entweichen kann.The limiting means or the block ring 7 preferably seals off between the lens 2 on the one hand and the device 1 on the other hand so that the preferably initially liquid block material 4, at least during filling, can not escape.

Zum Einfüllen weist beim Darstellungsbeispiel die Vorrichtung 1 bzw. das Begrenzungsmittel bzw. der Blockring 7 vorzugsweise eine entsprechende Einfüllöffnung 7A für das Blockmaterial 4 auf. Diese Einfüllöffnung 7A kann jedoch beispielsweise auch im Blockstück 3 oder durch das Blockstück 3 hindurch gebildet sein.For filling, in the illustrated example, the device 1 or the limiting means or the block ring 7 preferably has a corresponding filling opening 7A for the block material 4. However, this filling opening 7A may, for example, also be formed in the block piece 3 or through the block piece 3.

Beim Darstellungsbeispiel liegt die Einfüllöffnung 7A vorzugsweise oben oder in einem oberen Bereich, so dass beim Einfüllen des Blockmaterials 4 die Luft entweichen kann.In the illustrated example, the filling opening 7A is preferably at the top or in an upper area, so that the air can escape during the filling of the block material 4.

Die Vorrichtung 1 bzw. das Lagerteil 5, die Lagerung 6 und/oder das Blockstück 3 kann bzw. können bedarfsweise gekühlt werden, um ein vorzugsweise schnelles oder schnelleres Abkühlen und damit Verfestigen des Blockmaterials 4 zu erreichen.The device 1 or the bearing part 5, the bearing 6 and / or the block piece 3 can be cooled if necessary, in order to achieve a preferably rapid or faster cooling and thus solidification of the block material 4.

Das Blockstück 3 dient insbesondere als Halter der Linse 2 für eine spätere Bearbeitung der Linse 2. Für die spätere Bearbeitung der Linse 2 wird das Blockstück 3 in eine nicht dargestellte Aufnahme, wie ein Futter oder dergleichen, eingespannt, beispielsweise in eine Werkstückspindel, Anschließend kann die spanende bzw. sonstige formgebende Bearbeitung der Linse 2, insbesondere durch Drehen und/oder Fräsen, erfolgen.The block piece 3 serves in particular as a holder of the lens 2 for a subsequent processing of the lens 2. For the subsequent processing of the lens 2 is the Block piece 3 in a receptacle, not shown, such as a chuck or the like, clamped, for example, in a workpiece spindle, then the cutting or other shaping processing of the lens 2, in particular by turning and / or milling done.

Die geblockte Linse 2, also mit dem Blockstück 3 verbundene Linse 2 bildet eine Einheit, die nachfolgend auch kurz als "Block" bezeichnet wird.The blocked lens 2, that is to say the lens 2 connected to the block piece 3, forms a unit which is also referred to below as "block" for short.

Nach dem Blocken muss der Block bzw. die geblockte Linse 2 entnommen werden. Hierzu muss das Blockstück 3 von der Vorrichtung 1 bzw. deren Lagerteil 5 gelöst und auch die geblockte Linse 2 bzw. das Blockmaterial 4 bzw. der Block von dem Begrenzungsmittel bzw. Blockring 7 gelöst werden. Das Begrenzungsmittel bzw. der Blockring 7 kann lose auf der Vorrichtung 1 bzw. um die Lagerung 6 herum aufgelegt sein, wobei die Vorrichtung 1 bzw. Lagerung 6 einerseits und das Begrenzungsmittel bzw. der Blockring 7 andererseits vorzugsweise derart ausgebildet sind, das eine entsprechende koaxiale Positionierung insbesondere durch entsprechenden axialen Eingriff und/oder radialen Hintergriff oder auf sonstige Art und Weise erreicht oder sichergestellt wird. In dem Fall des vorzugsweise nur lose aufliegenden Begrenzungsmittels bzw. Blockrings 7 muss auch ein Trennen des Blockrings 7 insbesondere von dem Blockmaterial 4 nach dem Verfestigen des Blockmaterials 4 sichergestellt werden. Dies ist grundsätzlich möglich, da das Begrenzungsmittel bzw. der Blockring 7 eine im Wesentlichen konische oder konkave Innenfläche aufweist, die ein Trennen von dem anliegenden Blockmaterial 4 ermöglicht bzw, erleichtert. Nichtsdestotrotz kann dieses Trennen bzw. Lösen jedoch relativ schwierig sein.After blocking, the block or the blocked lens 2 must be removed. For this purpose, the block piece 3 must be released from the device 1 or its bearing part 5 and also the blocked lens 2 or the block material 4 or the block must be released from the limiting means or block ring 7. The limiting means or the block ring 7 can be placed loosely on the device 1 or around the bearing 6, wherein the device 1 or bearing 6 on the one hand and the limiting means or the block ring 7 on the other hand are preferably formed such that a corresponding coaxial Positioning is achieved or ensured in particular by corresponding axial engagement and / or radial engagement or in any other way. In the case of the preferably only loosely placed limiting means or block ring 7, a separation of the block ring 7, in particular of the block material 4 after solidification of the block material 4, must also be ensured. This is possible in principle since the limiting means or the block ring 7 has a substantially conical or concave inner surface, which enables or facilitates separation from the adjoining block material 4. Nevertheless, this separation can be relatively difficult.

Die Vorrichtung 1 weist eine Ausstoßeinrichtung 8 zum Lösen oder Unterstützen des Lösens der mit dem Blockstück 3 geblockten Linse 2 von der Vorrichtung 1 und/oder des Begrenzungsmittels bzw. Blockrings 7 auf. Die Ausstoßeinrichtung 8 greift außermittig an der Linse 2 mittelbar an. Es wird mindestens ein Ausstoßimpuls, wie durch Pfeil A angedeutet, erzeugt, der außermittig an der geblockten Linse 2 mittelbar angreift.The device 1 comprises an ejector 8 for releasing or assisting the release of the lens 2 blocked by the block piece 3 from the device 1 and / or the limiting means or block ring 7. The ejector 8 attacks off-center on the lens 2 indirectly. At least one ejection pulse, as indicated by arrow A, is produced, which acts off-center on the blocked lens 2 indirectly.

Zur Erzeugung des Ausstoßimpulses A weist die Ausstoßeinrichtung 8 vorzugsweise einen Stößel 9 auf, der entsprechend bewegbar ist, vorzugsweise pneumatisch bzw. durch Druckluft, insbesondere gegen die Kraft einer Rückstellfeder, durch eine doppeltwirkende Zylinderanordnung oder dergleichen. Die Ausstoßeinrichtung 8 ist also vorzugsweise pneumatisch antreibbar oder betätigbar.To generate the ejection pulse A, the ejector 8 preferably has a plunger 9, which is correspondingly movable, preferably pneumatically or by compressed air, in particular against the force of a return spring, by a double-acting cylinder arrangement or the like. The ejector 8 is thus preferably pneumatically driven or actuated.

Die Ausstoßeinrichtung 8 bzw. der Ausstoßimpuls A, greift außermittig an der Linse 2 mittelbar an. Ein mittelbares Angreifen erfolgt über das Begrenzungsmittel bzw, den Blockring 7. Besonders bevorzugt greift die Ausstoßeinrichtung 8 bzw. deren Stößel 9 bzw. der Ausstoßimpuls A unmittelbar an dem Begrenzungsmittel bzw. dem Blockring 7 an, und zwar besonders bevorzugt auf der der Linse 2 abgewandten Seite bzw. in die Ausstoß- und/oder Entnahmerichtung.The ejector 8 or the ejection pulse A, acts off-center on the lens 2 indirectly. The ejection device 8 or its plunger 9 or the ejection pulse A directly engages the limiting means or the block ring 7, particularly preferably on the side facing away from the lens 2 Side or in the ejection and / or removal direction.

Die Ausstoß-, Impuls- und/oder Entnahmerichtung verläuft vorzugsweise quer, insbesondere senkrecht, zu der der Linse 2 zugewandten Stimfläche des Blockstücks 3 und/oder zu der dem Blockstück 3 zugewandten Seite der Linse 2 oder einer Hauptebene der Linse 2. Alternativ oder zusätzlich verläuft die genannte Richtung vorzugsweise zumindest im Wesentlichen parallel zu einer Einspann-oder Rotationsachse des Blockstücks 3 bei einer späteren Bearbeitung der Linse 2. Diese Achse entspricht der in der Figur angedeuteten Bearbeitungsachse B.The ejection, impulse and / or removal direction preferably extends transversely, in particular perpendicularly, to the end face of the block piece 3 facing the lens 2 and / or to the side of the lens 2 or a main plane of the lens 2 facing the block piece 3. Alternatively or additionally the said direction preferably extends at least substantially parallel to a clamping or rotational axis of the block piece 3 during a subsequent machining of the lens 2. This axis corresponds to the machining axis B indicated in the figure.

Die Ausstoßeinrichtung 8 greift also an dem Begrenzungsmittel für die Linse 2 bzw. dem Blockring 7 unmittelbar an, um das Begrenzungsmittel bzw. den Blockring 7 von der mit dem Blockstück 3 geblockten Linse 2 bzw. von dem Blockmaterial 4 zu lockern oder zu lösen.The ejection device 8 thus acts directly on the limiting means for the lens 2 or the block ring 7, in order to loosen or release the limiting means or the block ring 7 from the lens 2 blocked by the block piece 3 or from the block material 4.

Beim Darstellungsbeispiel greift die Ausstoßeinrichtung 8 bzw. der Ausstoßimpuls A vorzugsweise radial außerhalb der Linse 2 an dem sich radial entsprechend weit nach außen erstreckenden Begrenzungsmittel bzw. Blockring 7 an. Insbesondere können so in sehr vorteilhafter Weise Vibrationen oder Schwingungen erzeugt werden, die das gewünschte Lösen der Linse 2 bzw. des Blocks von der Vorrichtung 1 und/oder des Begrenzungsmittels bzw. Blockrings 7 von dem Block bzw. Blockmaterial 4 bewirken oder zumindest unterstützen.In the illustrated example, the ejection device 8 or the ejection pulse A preferably engages radially outside the lens 2 on the limiting means or block ring 7 extending radially correspondingly far outward. In particular, vibrations or oscillations can thus be generated in a very advantageous manner, which effect or at least support the desired release of the lens 2 or of the block from the device 1 and / or the limiting means or block ring 7 from the block or block material 4.

Das Begrenzungsmittel bzw. der Blockring 7 ist vorzugsweise zumindest im Wesentlichen formstabil oder steif ausgebildet und/oder besonders bevorzugt aus Metall hergestellt.The limiting means or the block ring 7 is preferably formed at least substantially dimensionally stable or rigid and / or particularly preferably made of metal.

Die Ausstoßeinrichtung 8 bzw. deren Stößel 9 bzw. der Ausstoßimpuls A übt vorzugsweise ein Kippmoment auf die Linse 2, den Block, das Blockstück 3 und/oder das Begrenzungsmittel bzw. den Blockring 7 aus.The ejection device 8 or its plunger 9 or the ejection pulse A preferably exerts a tilting moment on the lens 2, the block, the block piece 3 and / or the limiting means or the block ring 7.

Die Ausstoßeinrichtung 8 bzw. der Ausstoßimpuls A bewirkt vorzugsweise ein Anheben der geblockten Linse 2 bzw. des Blocks.The ejector 8 or the ejection pulse A preferably causes a lifting of the blocked lens 2 and the block.

Gemäß einem auch unabhängig realisierbaren Aspekt der vorliegenden Erfindung können vorzugsweise mehrere Ausstoßimpulse A bzw. eine Folge von Ausstoßimpulsen A und/oder ein Vibrieren oder Schwingen, insbesondere des Begrenzungsmittels bzw. Blockrings 7, erzeugt werden. Vorzugsweise ist die Ausstoßeinrichtung 8 zur Erzeugung mehrerer Ausstoßimpulse A bzw, einer Folge von Ausstoßimpulsen A ausgebildet und/oder betätigbar. So kann das Lösen des Blocks bzw. der geblockten Linse 2 von der Vorrichtung 1 bzw. deren Lagerteil 5 und/oder das Lösen des Begrenzungsmittels bzw. Blockrings 7 von der geblockten Linse 2 bzw. dem Block bzw. dem Blockmaterial 4 erreicht oder zumindest unterstützt werden.According to an independently realizable aspect of the present invention, preferably a plurality of ejection pulses A or a series of ejection pulses A and / or vibrating or oscillating, in particular of the limiting means or block ring 7, can be produced. Preferably, the ejector 8 is designed to generate a plurality of ejection pulses A and, a sequence of ejection pulses A and / or actuated. Thus, the release of the block or the blocked lens 2 from the device 1 or its bearing part 5 and / or the release of the limiting means or block ring 7 from the blocked lens 2 or the block or the block material 4 achieved or at least supported become.

Die mehreren Ausstoßimpulse A oder Folge von Ausstoßimpulsen A kann grundsätzlich im Sinne der Erfindung beliebig auf die geblockte Linse 2 bzw. den Block mittelbar einwirken oder ausgeübt werden, dies erfolgt jedoch außermittig und mittelbar über das Begrenzungsmittel bzw. den Blockring 7.The plurality of ejection pulses A or a sequence of ejection pulses A can basically act or be exerted indirectly on the blocked lens 2 or the block in the sense of the invention, but this takes place off-center and indirectly via the limiting means or the block ring 7.

Die Vorrichtung 1 weist vorzugsweise zusätzlich zu der Ausstoßeinrichtung 8 eine Auswerfereinrichtung 10 auf, um zusätzlich eine Auswerferkraft, wie durch Pfeil K in der Figur angedeutet, auf das Blockstück 3 und/oder zentral auf die geblockte Linse 2 bzw. den Block auszuüben. Die Auswerfereinrichtung 10 weist zur Erzeugung der Auswerferkraft K vorzugsweise einen Stößel 11 auf, der entsprechend, insbesondere linear bzw. hin- und herbewegbar ist. Besonders bevorzugt ist die Auswerfereinrichtung 10 bzw. deren Stößel 11 pneumatisch bewegbar bzw. betätigbar, beispielsweise gegen die Kraft einer Rückstellfeder und/oder durch einen doppeltwirkenden Zylinder oder dergleichen.The device 1 preferably has, in addition to the ejection device 8, an ejection device 10, in addition to exerting an ejector force, as indicated by arrow K in the figure, on the block piece 3 and / or centrally on the blocked lens 2 or the block. To produce the ejector force K, the ejector device 10 preferably has a plunger 11, which can be moved back and forth accordingly, in particular linearly. Particularly preferably, the ejector device 10 or its plunger 11 is pneumatically movable or actuated, for example, against the force of a Return spring and / or by a double-acting cylinder or the like.

Es ist anzumerken, dass die Ausstoßeinrichtung 8 und/oder die Auswerfereinrichtung 10 bedarfsweise auch elektrisch oder elektromagnetisch angetrieben oder betätigt werden kann bzw. können.It should be noted that the ejection device 8 and / or the ejector device 10 can also be driven or actuated electrically or electromagnetically as required.

Die Richtung der Auswerferkraft K bzw. Bewegungsrichtung des Stößels 11 verläuft vorzugsweise zumindest im Wesentlichen parallel zu dem Ausstoßimpuls A und/oder zumindest im Wesentlichen parallel zu oder entlang der Bearbeitungsachse B.The direction of the ejector force K or direction of movement of the plunger 11 preferably runs at least substantially parallel to the ejection pulse A and / or at least substantially parallel to or along the machining axis B.

Die Auswerfereinrichtung 10 bzw. Auswerferkraft K wird vorzugsweise von der der Linse 2 abgewandten Seite auf die geblockte Linse 2 bzw. den Block bzw. das Blockstück 3, insbesondere durch eine zentrale Ausnehmung in der Vorrichtung 1 bzw. in deren Lagerteil 5 hindurch ausgeübt. Jedoch sind auch andere konstruktive Lösungen möglich.The ejection device 10 or ejector force K is preferably exerted on the blocked lens 2 or the block or block piece 3, in particular by a central recess in the device 1 or in its bearing part 5, from the side facing away from the lens 2. However, other constructive solutions are possible.

Besonders bevorzugt wird zunächst mindestens ein Ausstoßimpuls A und dann nachfolgend die Auswerferkraft K ausgeübt. Die Ausstoßeinrichtung 8 wird vorzugsweise also zuerst oder vor der Auswerfereinrichtung 10 betätigt.Particularly preferably, at least one ejection pulse A and then subsequently the ejector force K are exerted. The ejection device 8 is therefore preferably actuated first or in front of the ejector device 10.

Jedoch können die beiden Einrichtungen 8 und 10 bedarfsweise auch gleichzeitig betätigt oder betrieben werden.However, the two devices 8 and 10, if necessary, also be operated or operated simultaneously.

Beispielsweise ist es aber auch möglich, dass zunächst eine Folge von Ausstoßimpulsen A außermittig auf die geblockte Linse 2 bzw. das Begrenzungsmittel bzw. den Blockring 7 ausgeübt wird und dann während dessen zusätzlich die Auswerferkraft K, insbesondere zentral, ausgeübt wird, um damit dann den Block bzw. die geblockte Linse endgültig von der Vorrichtung 1 abzuheben.For example, it is also possible that first a sequence of ejection pulses A eccentrically on the blocked lens 2 and the limiting means or the block ring 7 is exercised and then during which additionally the Auswerferkraft K, in particular centrally, is exercised in order then the Block or the blocked lens finally lift off the device 1.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Vorrichtungdevice
22
Linselens
33
Blockstückblock piece
44
Blockmaterialblock material
55
Lagerteilbearing part
66
Lagerungstorage
77
Blockringblock ring
7A7A
Einfüllöffnungfill opening
88th
Ausstoßeinrichtungejector
99
Stößeltappet
1010
Auswerfereinrichtungejector
1111
Stößeltappet
AA
Ausstoßimpulsejection pulse
BB
Bearbeitungsachsemachining axis
KK
AuswerferkraftEjection

Claims (11)

  1. Apparatus (1) for blocking an optical lens (2) with a block piece (3),
    having an expelling device (8) for releasing or assisting the release of the lens (2) blocked with the block piece (3), i.e. the unit formed by the block piece (3) and lens (2) connected thereto, from the apparatus (1),
    wherein the expelling device (8) indirectly acts on the lens (2) off-center,
    wherein the apparatus comprises a limiting means (7) for a block material (4) connecting the lens (2) to the block piece (3), and wherein the limiting means (7) has a substantially conical or concave inner surface,
    characterized
    in that the expelling device (8) exerts a tilting moment to the lens (2) and/or the block piece (3) and/or is pneumatically operable, and
    in that the expelling device (8) acts on the limiting means (7) for the block material (4) to loosen or release the limiting means (7) from the lens (2) blocked with the block piece (3) and from the block material (4).
  2. Apparatus according to claim 1, characterized in that the limiting means is at least substantially dimensionally stable or rigid.
  3. Apparatus according to Claim 2, characterized in that the limiting means forms a support of the lens (2) during blocking and/or is at least substantially ring-shaped, in particular forms a block ring (7).
  4. Apparatus according to one of the preceding claims, characterized in that the expelling device (8) is designed and/or operable to generate one or more expelling pulses (A).
  5. Apparatus according to one of the preceding claims, characterized in that the apparatus (1) has an ejector device (10) for exerting an ejector force (K) on the block piece (3).
  6. Apparatus according to claim 5, characterized in that the expelling device (8) can be actuated before or simultaneously with the ejector device (10).
  7. Method for blocking an optical lens (2), wherein a block piece (3) is connected to the lens (2) by means of a block material (4) in an apparatus (1), whereby the lens (2) is blocked, i.e. a unit of block piece (3) and lens (2) connected thereto is formed, which is subsequently released from or out of the apparatus (1) by means of an expelling pulse (A), wherein the expelling pulse (A) indirectly acts on the blocked lens (2) off-center,
    wherein the apparatus comprises limiting means (7) for the block material (4) connecting the lens (2) to the block piece (3), and wherein the limiting means (7) has a substantially conical or concave inner surface (3)
    characterized
    in that the blocked lens (2) is tilted and/or raised by means of the expelling pulse (A), and
    in that the expelling pulse (A) acts on the limiting means (7) for the block material (4) and is transmitted via the limiting means (7) to the blocked lens (2).
  8. Method according to claim 7, characterized in that a sequence of expelling pulses (A) is generated.
  9. Method according to claim 7 or 8, characterized in that by means of the expelling pulse (A) the limiting means is loosened or released.
  10. Method according to claim 7 to 9, characterized in that the limiting means supports the lens (2) during blocking and/or forms a lateral boundary for the block material (4) until its solidification.
  11. Method according to any of claims 7 to 10, characterized in that in addition to the expelling pulse (A), an ejector force (K) is exerted in particular centrally on the block piece (3).
EP10015216.4A 2010-11-23 2010-12-02 Method and device for blocking a lens Active EP2455188B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10015216.4A EP2455188B1 (en) 2010-11-23 2010-12-02 Method and device for blocking a lens

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP10014890 2010-11-23
EP10015216.4A EP2455188B1 (en) 2010-11-23 2010-12-02 Method and device for blocking a lens

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Publication number Priority date Publication date Assignee Title
US9889535B2 (en) * 2012-12-13 2018-02-13 Essilor International (Compagnie Generale D'optique) Method for blocking an optical lens component

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3091062A (en) * 1962-09-17 1963-05-28 Coburn Mfg Company Inc Lens de-blocking device
GB2281525A (en) * 1993-09-07 1995-03-08 Gerber Optical Inc Lens blocking apparatus
EP2255925A1 (en) * 2009-05-27 2010-12-01 Essilor International (Compagnie Générale D'Optique) Lens blocking method and related device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1997586A1 (en) * 2007-05-07 2008-12-03 Essilor International (Compagnie Generale D'optique) lens blocking and deblocking method and related device
DE102008022660A1 (en) 2008-05-07 2009-11-12 Schneider Gmbh & Co. Kg A method of processing a lens blank and lens blank with bonding compound and block piece
EP2319660A1 (en) * 2009-11-09 2011-05-11 ESSILOR INTERNATIONAL (Compagnie Générale d'Optique) Lens deblocking method and related device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3091062A (en) * 1962-09-17 1963-05-28 Coburn Mfg Company Inc Lens de-blocking device
GB2281525A (en) * 1993-09-07 1995-03-08 Gerber Optical Inc Lens blocking apparatus
EP2255925A1 (en) * 2009-05-27 2010-12-01 Essilor International (Compagnie Générale D'Optique) Lens blocking method and related device

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