EP3564758A1 - Herstellungsverfahren von uhrenkomponenten, das eine schmuckbeschichtung mit aventurinquarz umfasst - Google Patents

Herstellungsverfahren von uhrenkomponenten, das eine schmuckbeschichtung mit aventurinquarz umfasst Download PDF

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Publication number
EP3564758A1
EP3564758A1 EP18170444.6A EP18170444A EP3564758A1 EP 3564758 A1 EP3564758 A1 EP 3564758A1 EP 18170444 A EP18170444 A EP 18170444A EP 3564758 A1 EP3564758 A1 EP 3564758A1
Authority
EP
European Patent Office
Prior art keywords
aventurine
manufacturing
support
decorative coating
component according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP18170444.6A
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English (en)
French (fr)
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EP3564758B1 (de
Inventor
Claire McGill
Gregory Kissling
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Omega SA
Original Assignee
Omega SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Omega SA filed Critical Omega SA
Priority to EP18170444.6A priority Critical patent/EP3564758B1/de
Priority to US16/381,850 priority patent/US20190338425A1/en
Priority to CN201910359023.4A priority patent/CN110442008A/zh
Publication of EP3564758A1 publication Critical patent/EP3564758A1/de
Application granted granted Critical
Publication of EP3564758B1 publication Critical patent/EP3564758B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
    • C23D5/00—Coating with enamels or vitreous layers
    • C23D5/08—Applying enamels non-uniformly over the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
    • C23D13/00—After-treatment of the enamelled articles
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/063—Balance construction
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/06—Dials
    • G04B19/12—Selection of materials for dials or graduations markings
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/26—Clocks or watches with indicators for tides, for the phases of the moon, or the like
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B29/00—Frameworks
    • G04B29/02—Plates; Bridges; Cocks
    • G04B29/027—Materials and manufacturing
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B37/00—Cases
    • G04B37/22—Materials or processes of manufacturing pocket watch or wrist watch cases
    • G04B37/225—Non-metallic cases
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B45/00—Time pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effects
    • G04B45/0015—Light-, colour-, line- or spot-effects caused by or on stationary parts

Definitions

  • the present invention relates to a method for manufacturing watch components comprising a decorative coating of aventurine, in particular a method of manufacturing watch dials formed partially of aventurine.
  • dials and discs / display rings for timepieces, the person skilled in the art works this material as one works a semi-precious stone or a quartz crystal, by cutting pieces of aventurine in thin plates which are then glued on metal supports.
  • Such dials and discs / display rings clothe watches of several watch brands, including OMEGA, Jaquet Droz and Bulgari TM watches.
  • dials aventurine as described above has various disadvantages. Indeed, these dials in aventurine are difficult to prepare and assemble. Cutting adventurine pieces into thin slices and cutting the desired profiles in these slices generate a fair amount of waste. Then, the aventurine presents quite often small air bubbles that appear after polishing and make unusable thin platelets obtained. In addition, these thin plates are fragile and therefore brittle. Their handling is perilous and the assembly of these thin plates with their respective supports to make the dials is a delicate operation.
  • patterns and / or indexes on aventurine platelets already presents a risk of cracking them.
  • they may in particular be made of metal by electroforming on an aventurine wafer; but such a method is generally performed on the aventurine wafer before gluing to its support. This process requires various manipulations so that the risk of breaking the wafer is important.
  • patterns and / or indexes of metal, in particular of noble metal by structuring the metal support of the dial so that these patterns and / or indexes are in relief relative to the surface intended to receive by gluing the wafer.
  • patterns and / or indexes of metal in particular of noble metal
  • the present invention aims to provide watch components, in particular dials, having at least one surface covered with aventurine to form a decorative coating, while solving the various problems mentioned in the presentation of the prior art.
  • the manufacturing method according to the invention is remarkable because one thus obtains a decorative coating which perfectly presents the aesthetic characteristics of the aventurine, namely a semi-precious stone aspect with the flicker proper to the aventurine. It is astonishing that the passage through a baking oven does not significantly reduce the flicker from the small copper crystals, as the copper oxidizes easily and then has a dull, green or black color. Tests carried out with enamel powders which were added a granular powder of oxidative metal, especially copper, gave negative results, without flickering. In the case of a copper filings, the copper grains have blackened in the baking oven. Then even with Nonoxidative metals, especially with a gold powder, do not get the remarkable flicker of aventurine. In addition, it is difficult to have a homogeneous distribution of the gold powder in the enamel.
  • the sequence of steps D) and E) of the manufacturing process is repeated several times, so that the decorative coating is formed of a plurality of enamel layers consisting of aventurine and deposited one on the other.
  • the plurality of deposited enamel layers ultimately forms only one layer of enamel having a greater thickness.
  • This decorative coating and has a thickness to give some depth to the decorative coating and to hide the support.
  • the decorative coating has a thickness between 200 and 300 microns (200-300 microns). Such a thickness remains relatively small compared to aventurine platelets as made in the prior art which have a thickness generally between 400 and 500 microns.
  • the present invention thus makes it possible to produce dials having a smaller thickness.
  • a flux is deposited on the obtained aventurine enamel and is baked to form a top layer transparent which is homogeneous and has a regular upper surface.
  • a final step of polishing the decorative coating is performed, this polishing may have a preliminary phase consisting of a stoning to better equalize the upper surface of the decorative coating.
  • the polishing is made easier to perform and the result is generally better when a layer of flux is deposited on the enamel aventurine.
  • the cooled flux layer can be polished to give a perfectly smooth upper surface, while the enamel in aventurine poses a certain problem polishing due to the presence of copper crystals in this enamel aventurine which may be on its surface or near it.
  • an enameling is performed on a rear surface of the support, that is to say on the opposite side to that of the surface intended to receive the decorative coating, this enameling forming a counter-enamel to best retain the initial shape of the support during the formation of one or more layer (s) of enamel to form the decorative coating and prevent the appearance of cracks in the decorative coating when of its realization.
  • a support 4 is made having a rigid base whose general shape defines a disk.
  • This support 4 consists of a material having a melting temperature of greater than 1000 °.
  • a surface 6, intended to receive a decorative coating, is machined in the support of its upper side, that is to say on the visible side of the dial once incorporated into a watch case.
  • the support is metallic, in particular gold or silver, and has patterns 8 to be visible in the finished product, these patterns being integral with the base of the support.
  • the patterns 8 define Roman numerals I to XII.
  • the surface 6 is flat and machined hollow in the support 4.
  • the dial has at least one opening 14 delimited by an inner rim 12 which projects from the surface 6, this support also having an outer rim 10 protruding from the surface 6 and delimiting the outer periphery of this surface.
  • Dial feet 18 are fixed to the support 4 on its lower side.
  • At least one piece of aventurine 20A-20C is provided which is formed of a mass of colored glass containing copper crystals distributed in the mass.
  • Stocks of such pieces of aventurine manufactured in the Venetian region, particularly in Murano, are available and offered for sale by various specialized companies. These pieces of aventurine can have various dimensions, including several centimeters, and various shapes. They come from blocks of aventurine formed in the crucible of glass production furnaces.
  • At least one piece of aventurine is crushed so as to obtain a granular powder 22.
  • the size of the grains can be variable.
  • the support 4 and the granular powder deposited on the surface 6 are introduced into a baking oven in which this powder the granular material is at least partially melted (that is to say, it enters a so-called viscous state) so as to obtain, after removing the assembly thus obtained from the baking oven and allow the mixture to cool, a layer of Enamel incorporated aventurine which covers the surface 6 of the support and forms a decorative coating 16 which strongly adheres to the support.
  • the temperature during the baking of the granular powder is between about 700 ° and 900 °.
  • the duration of the baking oven is for example about two minutes.
  • the cooling of the assembly out of the baking oven is performed slowly so as to avoid a thermal shock which could cause deformation of this assembly and the appearance of cracks in the enamel layer.
  • the deposit of granular powder of aventurine on the surface 6 consists of an application of this mixture on this surface of the support 4. Such an application can be done with the aid of a brush.
  • the granular powder of aventurine is deposited in the form of liquid paste
  • a drying step of the liquid paste that is to say the mixture consisting of the granular powder and the liquid, after being deposited on the surface 6, this drying step being carried out in a drying oven before the introduction of the support and the granular powder extended on the surface 6 in the baking oven.
  • the temperature in the drying oven is provided between 50 ° and 200 °. The drying time depends on the thickness of the liquid paste deposited, its viscosity and the expected drying temperature.
  • the sequence of steps ranging from the deposition of adventurine granular powder to its slow cooling after melting in the baking oven, is repeated several times so that the decorative coating is finally formed.
  • a plurality of enamel layers consisting of aventurine which are deposited one on the other.
  • the decorative coating presents a thickness between 200 and 300 microns (200-300 microns), this range of values being non-limiting.
  • the internal rim 12 bordering the opening 14 and the outer rim 10 form lateral abutments for the granular powder deposited on the surface 6 during at least a first sequence of steps ranging from the deposition of granular powder of aventurine to its cooling after melting in the baking oven.
  • the patterns 8, in relief inside the surface 6, form lateral stops for the granular powder deposited on this surface during at least the first sequence of steps mentioned above.
  • the manufacturing method according to the invention has the advantage that the decorative coating formed of aventurine precisely matches the contours of the patterns provided inside the decorative coating and also the edge contours bordering the openings, so that it There is no crack between the aventurine enamel and these patterns and edges.
  • the patterns may be relatively complex and have small spaces between them, this thanks to the deposit of a granular powder of aventurine in the manner of an enameling.
  • a flux on the upper layer of enamel aventurine.
  • This flux is fired to form a transparent upper layer of the decorative coating 16.
  • Such a flux is made of a glass which generally melts at a temperature below the melting temperature of the granular powder of aventurine.
  • This fluxing layer makes it possible to better equalize the upper surface of the decorative coating and to make it more even and smooth, in particular by filling small crevices or slight depressions on the surface of the aventurine enamel and / or by covering crystals of copper that can appear on the surface of enamel in aventurine.
  • the flux prevents the possible oxidation of aventurine crystals located on the surface of the enamel in aventurine.
  • the transparent glass surface layer is easier to polish and thus relatively smooth and shiny surfaces can be relatively easily obtained.
  • the polishing of the enamel in aventurine is difficult to realize correctly because copper crystals located on the surface of the enamel or in close proximity of this one are detached during the polishing, which generates porosities on the surface .
  • copper crystals that are removed from the surface during polishing scratch the enamel surface.
  • the flux that does not contain metal crystals does not present such a problem.
  • This final polishing step may have several phases, namely a preliminary phase consisting of a stoning, allowing significant material removal to equalize the upper level of the decorative coating 16, which is followed by one or more polishing phases with less removal. of material and carried out so as to obtain a perfectly smooth and glossy surface. It will be noted that this polishing step also serves to remove enamel that may cover all or part of the patterns 8, these patterns being finally flush with the decorative coating 16 and having glossy upper surfaces.
  • the second embodiment differs from the first embodiment in that an enameling is performed on a surface 38 of the support 4A of the dial 24, on the opposite side to that of the surface 6A intended to receive the coating.
  • decorative 26 this enameling forming a enamel enamel 48.
  • This enamel allows to equalize the tensions in the support so as to limit the deformation of the support during the passages of the assembly, formed by this support and the enamel deposited on both sides of the support, in the baking oven and more particularly during the following cooling.
  • the base of the support has a thickness of 0.55 millimeters while the decorative coating 26 and the enamel enamel 48 each have a thickness of 0.15 millimeters, the dial thus having a total thickness of 0.85 millimeters .
  • an enameling step is thus performed on a surface of the support 4A on the opposite side to that of the surface 6A intended to receive the decorative coating, this enamelling used to form a enamel enamel 48 to retain the initial shape of the support during the passages of the assembly, formed by this support and the enamel deposited on both sides of the support, in the baking oven and more particularly during the subsequent cooling.
  • the support 4A of the dial 24 has several openings, namely an opening 28 for the display of the moon phase and three circular openings 14, 14A and 14B for the passage of the needle cannons provided for the display of various data, in particular the current time, a time interval (chronograph), or calendar data.
  • an opening 28 for the display of the moon phase and three circular openings 14, 14A and 14B for the passage of the needle cannons provided for the display of various data, in particular the current time, a time interval (chronograph), or calendar data.
  • calendar data one can provide in the dial one or more rectangular openings each defining a window showing a calendar data (variant not shown).
  • the openings 28, 14, 14A and 14B have, on the side of the upper face 25 of the dial respectively, flanges 30, 12, 12A and 12B which project of the surface 6A machined in the support 4A.
  • the openings 28, 14, 14A and 14B have, on the side of the lower face 36 of the support 4A, respectively flanges 42, 40, 40A and 40B protruding from the surface 38 machined in the support 4A.
  • the outer periphery of the decorative coating is delimited by an outer rim 10 just as the outer periphery of the enamel is delimited by an outer rim 10A projecting from the surface 38.
  • embossed patterns 32 which form a plurality of pedestals provided to finally receive a plurality of indexes 50 which raised above the upper face 25 of the dial defined in part by the upper surface of the decorative coating 26.
  • These bases are flush with the decorative coating 26.
  • the massive indexes 50 have feet 51 which are introduced into holes provided in the bases , the indexes being fixed by means of a solder or an adhesive 52 made in cavities 34 located under the bases on the side of the lower face 36 of the support 4A.
  • the internal profile 44 of the flange 10A does not correspond to that of the flange 10, but it defines a sinuous path so as to include in the flange 10A the cavities 34. It will also be noted that, so as to limit the final thickness of the dial while having a decorative coating sufficiently thick not to reveal the support and to give some depth to the decorative coating, the thickness of the enamel 48 is provided lower than that of the decorative coating 26, as shown in Figures 8 and 9 .
  • the decorative coating may have a thickness of 0.20 to 0.25 millimeters while the enamel layer has a thickness of 0.15 millimeters.
  • the enamel 48 must not be in sangine, but it may be formed by another more common enamel or by a transparent flux having, preferably, a melting temperature substantially identical to that of the colored glass.
  • the support 4A has two holes 46 on the side of the lower face 36 for two feet for positioning and fixing the dial 24 to a watch movement.
  • the dial 56 is essentially distinguished from the dial 2 of Figures 1 to 3 by two characteristics.
  • the dial 56 has a counter-enamel layer 66, on the side of its rear face, which is deposited and formed in a recess machined in the support 4B so as to define a hollow surface 60 for receiving the enamel enamel .
  • the surface is delimited, as in the second embodiment of the invention, by an outer rim 62 and an inner rim 64 surrounding the central hole 14.
  • the dial 56 has an upper surface 58 (principal surface visible in the watch), defined by the patterns 8B in relief and the upper surface of the decorative coating 16B formed of aventurine, which is curved.
  • the decorative coating 16B is not formed by a flat layer, the surface 6B intended to receive it having portions having a certain inclination relative to the general plane of the dial 56.
  • the dial according to the variant described here has a convex upper surface, which is at least partially defined by the upper surface of said decorative coating.
  • the dial according to the variant described here has a convex upper surface, which is at least partially defined by the upper surface of said decorative coating.
  • the sangine is milled and deposited in the manner of an enameling
  • the granular powder of aventurine mixed with a liquid can thus be deposited on non-flat surfaces in a manner similar to a deposit on flat surfaces, and the baking of this granular powder provides enamel layers consisting of aventurine and each having a relatively constant thickness but non-planar shapes.
  • the final polishing step in particular with diamond, makes it possible to obtain an upper surface 58 having a curved profile that is regular and shiny.
  • the production of decorative coatings with a curved outer surface is a great advantage of the manufacturing method according to the invention.
  • the method of manufacturing a watch component according to the invention does not apply only to a display element, in particular a dial or a disc indicating the moon phase, but also to other watch components.
  • the watch component is a part of a watch case, in particular a bezel, or the watch component is part of a watch movement, in particular a bridge or an oscillating weight.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Astronomy & Astrophysics (AREA)
  • Powder Metallurgy (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
EP18170444.6A 2018-05-02 2018-05-02 Herstellungsverfahren von uhrenkomponenten, das eine schmuckbeschichtung mit aventurinquarz umfasst Active EP3564758B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP18170444.6A EP3564758B1 (de) 2018-05-02 2018-05-02 Herstellungsverfahren von uhrenkomponenten, das eine schmuckbeschichtung mit aventurinquarz umfasst
US16/381,850 US20190338425A1 (en) 2018-05-02 2019-04-11 Method for fabricating timepiece components including a decorative coating of aventurine
CN201910359023.4A CN110442008A (zh) 2018-05-02 2019-04-30 制造包括砂金石装饰覆层的钟表组件的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18170444.6A EP3564758B1 (de) 2018-05-02 2018-05-02 Herstellungsverfahren von uhrenkomponenten, das eine schmuckbeschichtung mit aventurinquarz umfasst

Publications (2)

Publication Number Publication Date
EP3564758A1 true EP3564758A1 (de) 2019-11-06
EP3564758B1 EP3564758B1 (de) 2021-06-30

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US (1) US20190338425A1 (de)
EP (1) EP3564758B1 (de)
CN (1) CN110442008A (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD927328S1 (en) * 2018-12-06 2021-08-10 Cartier International Ag Watch
EP3835880B1 (de) 2019-12-10 2022-08-10 Comadur S.A. Uhrzifferblatt mit füsschen
EP3882715B1 (de) * 2020-03-19 2024-03-13 Omega SA Uhr mit doppelseitiger anzeige
EP3892151A1 (de) 2020-04-06 2021-10-13 Rolex Sa Uhrenkomponente und verfahren zur herstellung einer uhrenkomponente
EP3968097A1 (de) * 2020-09-09 2022-03-16 Nivarox-FAR S.A. Uhrenreihe und ihr herstellungsverfahren
EP4016200A1 (de) * 2020-12-21 2022-06-22 The Swatch Group Research and Development Ltd Verfahren zur herstellung einer digitalen anzeigevorrichtung und digitale anzeigevorrichtung

Citations (2)

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Publication number Priority date Publication date Assignee Title
FR324710A (fr) * 1902-09-24 1903-04-08 Humbert Droz A Une boite de montre
JP2005274358A (ja) * 2004-03-25 2005-10-06 Citizen Watch Co Ltd 表示板構造

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Publication number Priority date Publication date Assignee Title
JP4570424B2 (ja) * 2004-03-29 2010-10-27 大日本印刷株式会社 化粧シート又は化粧板の表面に形成された凹部の着色方法
CH702836B1 (fr) * 2008-06-23 2011-09-30 Omega Sa Pièce décorative réalisée par incrustation et pièce d'horlogerie comprenant une telle pièce.
CH704681B1 (fr) * 2011-03-23 2015-08-14 Rubattel Et Weyermann S A Pièce émaillée décorée pour une pièce d'horlogerie ou de joaillerie et son procédé de fabrication.
CN107379863B (zh) * 2017-07-27 2022-04-15 广州番禺职业技术学院 一种仿掐丝珐琅表盘及其生产方法
CN107329390B (zh) * 2017-07-27 2023-06-16 广州番禺职业技术学院 一种高温珐琅表盘及其制作方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR324710A (fr) * 1902-09-24 1903-04-08 Humbert Droz A Une boite de montre
JP2005274358A (ja) * 2004-03-25 2005-10-06 Citizen Watch Co Ltd 表示板構造

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US20190338425A1 (en) 2019-11-07
CN110442008A (zh) 2019-11-12
EP3564758B1 (de) 2021-06-30

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