EP2503415B1 - Decorated enamelled part - Google Patents

Decorated enamelled part Download PDF

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Publication number
EP2503415B1
EP2503415B1 EP12157581.5A EP12157581A EP2503415B1 EP 2503415 B1 EP2503415 B1 EP 2503415B1 EP 12157581 A EP12157581 A EP 12157581A EP 2503415 B1 EP2503415 B1 EP 2503415B1
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EP
European Patent Office
Prior art keywords
layer
enamel
decoration
enamel layer
dial
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EP12157581.5A
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German (de)
French (fr)
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EP2503415A1 (en
Inventor
Frédéric Jeanrenaud
Stewes Bourban
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Rubbatel & Weyermann Sa
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Rubbatel & Weyermann Sa
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Priority to EP11159377A priority Critical patent/EP2503414A1/en
Application filed by Rubbatel & Weyermann Sa filed Critical Rubbatel & Weyermann Sa
Priority to EP12157581.5A priority patent/EP2503415B1/en
Publication of EP2503415A1 publication Critical patent/EP2503415A1/en
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Publication of EP2503415B1 publication Critical patent/EP2503415B1/en
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    • GPHYSICS
    • G04HOROLOGY
    • G04DAPPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0002Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe
    • G04D3/0043Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the time-indicating mechanisms
    • G04D3/0048Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the time-indicating mechanisms for dials
    • AHUMAN NECESSITIES
    • A44HABERDASHERY; JEWELLERY
    • A44CJEWELLERY; BRACELETS; OTHER PERSONAL ADORNMENTS; COINS
    • A44C15/00Other forms of jewellery
    • A44C15/004Jewellery with monograms or other inscription
    • AHUMAN NECESSITIES
    • A44HABERDASHERY; JEWELLERY
    • A44CJEWELLERY; BRACELETS; OTHER PERSONAL ADORNMENTS; COINS
    • A44C27/00Making jewellery or other personal adornments
    • A44C27/001Materials for manufacturing jewellery
    • A44C27/005Coating layers for jewellery
    • A44C27/007Non-metallic coatings
    • GPHYSICS
    • G04HOROLOGY
    • G04BMECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00Indicating the time by visual means
    • G04B19/06Dials
    • G04B19/10Ornamental shape of the graduations or the surface of the dial; Attachment of the graduations to the dial
    • GPHYSICS
    • G04HOROLOGY
    • G04BMECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00Indicating the time by visual means
    • G04B19/06Dials
    • G04B19/12Selection of materials for dials or graduations markings
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24917Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including metal layer
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24926Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including ceramic, glass, porcelain or quartz layer

Description

    Domaine de l'inventionField of the invention
  • L'invention se rapporte à une pièce émaillée pour une pièce d'horlogerie ou de joaillerie et plus précisément, une telle pièce comportant des décors.The invention relates to an enamelled piece for a timepiece or jewelery and more specifically, such a piece having decorations.
  • Arrière plan de l'inventionBackground of the invention
  • Il est connu du document EP 1 640 822 de réaliser des cadrans émaillés à l'aspect haut de gamme à partir d'un substrat en céramique revêtu d'une couche d'émail afin de les fabriquer moins artisanalement. Il devient toutefois nécessaire de former également les index ou graduations selon le même aspect haut de gamme. Actuellement, à titre d'exemple, il n'est pas possible de réaliser des décors selon le même rendu que l'émaillage principal du cadran ni même offrir des décors métalliques au rendu aussi haut de gamme.It is known from the document EP 1 640 822 to make high-end enamelled dials from a ceramic substrate coated with a layer of enamel to make them less artisanal. However, it becomes necessary to also form the indexes or graduations according to the same high-end appearance. Nowadays, for example, it is not possible to make sets with the same rendering as the main enameling of the dial or even to offer metal decors to render as high-end.
  • Le document FR 2432942 décrit une pièce émaillée comprenant deux couches d'émail superposées. Le document EP 1538493 décrit un cadran à substrat céramique revêtu d'une seule couche d'émail.The document FR 2432942 describes an enamelled piece comprising two layers of enamel superimposed. The document EP 1538493 discloses a ceramic substrate dial coated with a single layer of enamel.
  • Résumé de l'inventionSummary of the invention
  • Le but de la présente invention est de pallier tout ou partie les inconvénients cités précédemment en proposant des pièces émaillées, comme par exemple pour un cadran, dont les décors métallisés ou non sont de rendus sensiblement équivalents à l'émaillage principal de la pièce.The object of the present invention is to overcome all or part of the drawbacks mentioned above by proposing enamelled parts, such as for a dial, whose metallized decor or not are rendered substantially equivalent to the main enameling of the piece.
  • A cet effet, l'invention se rapporte à une pièce émaillée pour un cadran comportant un substrat en céramique revêtu d'une première couche d'émail au moins une autre couche d'émail recouvrant partiellement la première couche d'émail caractérisée en ce que ladite au moins une autre couche d'émail est au moins partiellement recouverte d'une couche métallique.For this purpose, the invention relates to an enameled part for a dial comprising a ceramic substrate coated with a first enamel layer, at least one other enamel layer partially covering the first enamel layer, characterized in that said at least one other layer of enamel is at least partially covered with a metal layer.
  • On comprend donc que, de manière préférée selon l'invention, il est possible d'obtenir des pièces émaillées pour un cadran, c'est-à-dire le cadran lui-même ou une partie rapportée sur le cadran ou une partie similaire à un cadran, dont les décors, métallisés ou partiellement métallisés, offrent un rendu global homogène par rapport à l'émaillage principal de la pièce, c'est-à-dire haut de gamme.It is therefore understood that, in a preferred manner according to the invention, it is possible to obtain enamelled pieces for a dial, that is to say the dial itself or a portion attached to the dial or a part similar to a dial, whose decorations, metallized or partially metallized, offer an overall homogeneous performance compared to the main enameling of the piece, that is to say, upscale.
  • Conformément à d'autres caractéristiques avantageuses de l'invention :
    • ladite au moins une autre couche est totalement recouverte d'une couche métallique ;
    • ladite au moins une autre couche est de couleur différente et/ou sensiblement identique à la première couche d'émail ;
    • ladite au moins une autre couche comporte une épaisseur variable afin d'offrir un dégradé de couleur ;
    • ledit décor forme au moins un symbole alphanumérique et/ou un dessin.
    According to other advantageous features of the invention:
    • said at least one other layer is completely covered with a metal layer;
    • said at least one other layer is of different color and / or substantially identical to the first enamel layer;
    • said at least one other layer has a variable thickness to provide a color gradient;
    • said decoration forms at least one alphanumeric symbol and / or a drawing.
  • De plus, l'invention se rapporte à un procédé de décoration d'une pièce émaillée pour un cadran comportant l'étape suivante :
  1. a) former un substrat à base de céramique dont la partie visible est revêtue d'une première couche d'émail ;
  2. b) former sélectivement une autre couche d'émail par-dessus de la première couche d'émail afin de former un décor sur ladite surface visible.
caractérisé en ce qu'il comporte l'étape suivante :
  1. e') recouvrir au moins partiellement ladite une autre couche d'émail d'une couche métallique afin que ledit décor présente une réflexion qui est homogène quelle que soit l'incidence lumineuse.
In addition, the invention relates to a method of decorating an enameled part for a dial comprising the following step:
  1. a) forming a ceramic-based substrate whose visible portion is coated with a first enamel layer;
  2. b) selectively forming another enamel layer over the first enamel layer to form a pattern on said visible surface.
characterized in that it comprises the following step:
  1. e ') at least partially covering said other layer of enamel with a metal layer so that said decoration has a reflection which is homogeneous regardless of the light incidence.
  • Conformément à d'autres caractéristiques avantageuses de l'invention :
    • ladite au moins une autre couche comporte une épaisseur variable afin d'offrir un dégradé de couleur ;
    • l'étape b) comporte les phases c) : imprimer sélectivement, sur ladite première couche d'émail, ledit décor à l'aide d'une solution précurseur de ladite une autre couche d'émail et d) : chauffer la pièce afin transformer la solution précurseur en émail ;
    • la température de transformation de ladite une autre couche d'émail est au moins 100°C moins élevée que celle de la première couche d'émail afin de ne pas détériorer cette dernière lors de chaque étape b) ;
    • la phase c) est réalisée par tampographie ou sérigraphie ;
    • ladite une autre couche est de couleur différente et/ou sensiblement identique à la première couche d'émail .
    According to other advantageous features of the invention:
    • said at least one other layer has a variable thickness to provide a color gradient;
    • step b) comprises phases c): selectively printing, on said first enamel layer, said decoration using a solution precursor of said another enamel layer and d): heating the room to transform the precursor enamel solution;
    • the transformation temperature of the said other enamel layer is at least 100 ° C lower than that of the first enamel layer so as not to damage it during each step b);
    • phase c) is performed by pad printing or screen printing;
    • said another layer is of different color and / or substantially identical to the first enamel layer.
  • Description sommaire des dessinsBrief description of the drawings
  • D'autres particularités et avantages ressortiront clairement de la description qui en est faite ci-après, à titre indicatif et nullement limitatif, en référence aux dessins annexés, dans lesquels :
    • la figure 1 est une représentation d'une première variante d'application selon l'invention ;
    • la figure 2 est une représentation d'une deuxième variante d'application selon l'invention ;
    • la figure 3 est une représentation d'une troisième variante d'application selon l'invention ;
    • la figure 4 est une représentation d'une quatrième variante d'application selon l'invention ;
    • les figures 5 à 7 sont des représentations d'étapes principales d'un procédé de décoration selon l'invention ;
    • la figure 8 est une représentation d'une étape finale du procédé de décoration selon l'invention.
    Other particularities and advantages will emerge clearly from the description which is given hereinafter, by way of indication and in no way limiting, with reference to the appended drawings, in which:
    • the figure 1 is a representation of a first variant of application according to the invention;
    • the figure 2 is a representation of a second variant of application according to the invention;
    • the figure 3 is a representation of a third variant of application according to the invention;
    • the figure 4 is a representation of a fourth variant of application according to the invention;
    • the Figures 5 to 7 are representations of main stages of a decoration process according to the invention;
    • the figure 8 is a representation of a final step of the decoration process according to the invention.
  • Description détaillée des modes de réalisation préférésDetailed Description of the Preferred Embodiments
  • L'invention a été développée pour une pièce émaillée d'une pièce d'horlogerie comme un cadran ou une couronne. Bien entendu, la présente invention ne saurait se limiter au domaine de l'horlogerie. D'autres applications sont également envisageables comme, notamment, dans la bijouterie ou la joaillerie pour des boutons de manchettes, des boucles d'oreilles ou des pendentifs.The invention has been developed for an enamelled piece of a timepiece such as a dial or a crown. Of course, the present invention can not be limited to the field of watchmaking. Other applications are also conceivable, such as, for example, jewelery or jewelery for cufflinks, earrings or pendants.
  • Ainsi, à la figure 1, on peut voir un exemple de pièce d'horlogerie 1 dont le cadran 3 comporte la plupart des écueils de fabrication que l'on peut rencontrer. Le cadran 3 comporte ainsi une surface principale P constituant la face visible la plus étendue.So, at the figure 1 , we can see an example of a timepiece 1 whose dial 3 has most of the pitfalls that can be encountered. The dial 3 thus comprises a main surface P constituting the widest visible face.
  • Comme visible à la figure 1, par-dessus la surface P, le cadran 3 peut comporter, rapporté(s), un tour d'heure 2 et/ou un affichage secondaire 4 formé(s) par au moins un index et/ou au moins un symbole alphanumérique.As visible at figure 1 , over the surface P, the dial 3 may comprise, reported (s), a time lapse 2 and / or a secondary display 4 formed (s) by at least one index and / or at least one alphanumeric symbol.
  • Le cadran 3 peut également comporter un affichage secondaire 5 dont la surface visible est montée selon un plan au-dessus de la surface P afin de former une zone surélevée. A l'inverse, le cadran 3 peut également comporter un affichage secondaire 6 dont la surface visible est montée selon un plan au-dessous de la surface P afin de former une zone en creux. Le cadran 3 peut également comporter un guichet 7, c'est-à-dire une ouverture du cadran 3 permettant de montrer une partie du mouvement 8 montée sous le cadran 3, comme une phase de lune 11 dans l'exemple de la figure 1.The dial 3 may also include a secondary display 5 whose visible surface is mounted in a plane above the surface P to form a raised area. Conversely, the dial 3 may also include a secondary display 6 whose visible surface is mounted in a plane below the surface P to form a recessed area. The dial 3 may also include a window 7, that is to say an opening of the dial 3 to show part of the movement 8 mounted under dial 3, like a moon phase 11 in the example of the figure 1 .
  • L'invention se rapporte avantageusement à une pièce émaillée décorée comportant un seul plan P, c'est-à-dire comprenant une surface unique plane ou non, ou plusieurs plans. Selon l'invention, la pièce émaillée comporte un substrat en céramique qui est revêtu d'une première couche d'émail afin d'améliorer l'aspect dudit cadran. Bien entendu, quand on parle d'une couche d'émail dans le présent texte, il faut comprendre un empilement de revêtements du même émail selon une épaisseur comprise entre 0,1 mm et 0,4 mm permettant de donner la coloration plus ou moins soutenue souhaitée.The invention advantageously relates to a decorated enamelled piece having a single plane P, that is to say comprising a single planar surface or not, or several planes. According to the invention, the enameled part comprises a ceramic substrate which is coated with a first layer of enamel to improve the appearance of said dial. Of course, when we speak of an enamel layer in the present text, it is necessary to understand a stack of coatings of the same enamel with a thickness of between 0.1 mm and 0.4 mm making it possible to give the color more or less sustained desired.
  • Avantageusement selon l'invention, la pièce émaillée comporte au moins une autre couche d'émail recouvrant partiellement la première couche d'émail afin de former un décor avec un aspect amélioré similaire à celui de la première couche d'émail. Le terme au moins une autre couche d'émail s'entend comme une ou plusieurs couches. Chaque couche pouvant recouvrir la première couche d'émail et/ou une autre couche d'émail comme cela sera expliqué ci-dessous.Advantageously according to the invention, the enameled part comprises at least one other enamel layer partially covering the first enamel layer in order to form a decoration with an improved appearance similar to that of the first enamel layer. The term at least one other enamel layer is understood as one or more layers. Each layer may cover the first layer of enamel and / or another layer of enamel as will be explained below.
  • Ainsi, de manière avantageuse selon l'invention, chaque au moins une autre couche peut être de couleur différente ou sensiblement identique à la première couche d'émail. En effet, il est parfois souhaité de faire figurer des signatures « secrètes », c'est-à-dire difficilement identifiables au premier coup d'oeil. Cela est rendu possible par l'application d'une deuxième couche d'émail de la forme de la signature 9, comme illustrée à la figure 1, d'une couleur sensiblement identique à celle du premier émail. La signature 9 ne sera alors visible que par l'ombre qu'elle projettera en incidence lumineuse rasante.Thus, advantageously according to the invention, each at least one other layer may be of different or substantially identical color to the first enamel layer. Indeed, it is sometimes desirable to include "secret" signatures, that is to say hardly identifiable at first glance. This is made possible by the application of a second enamel layer of the shape of the signature 9, as illustrated in FIG. figure 1 , a color substantially identical to that of the first enamel. The signature 9 will then be visible only by the shadow that it will project in grazing light incidence.
  • Chaque au moins une autre couche peut également comporter une couche de couleur différente. Ainsi, une première possibilité peut consister à former l'intégralité du décor avec une couche d'un unique deuxième émail tranchant avec la couleur du premier émail. A titre d'exemple, on obtient alors une qualité de rendu proche de la première couche d'émail tout en contrastant nettement le décor par rapport à la première couche d'émail comme visible à la figure 1 pour le tour d'heure 2.Each at least one other layer may also include a different color layer. Thus, a first possibility may consist in forming the entire decoration with a layer of a single second enamel cutting with the color of the first enamel. As an example, we obtain then a quality of rendering close to the first layer of enamel while contrasting the decor clearly with respect to the first layer of enamel as visible in the figure 1 for the hour turn 2.
  • Alternativement à cette première possibilité, des parties du décor peuvent comporter une couche plus épaisse du deuxième émail pour donner l'impression d'un dégradé de couleur. En effet, les parties du décor comportant moins d'épaisseur du deuxième émail, laisseront, par transparence, passer une partie de la couleur du premier émail en donnant l'impression d'une couleur intermédiaire.Alternatively to this first possibility, parts of the decor may have a thicker layer of the second enamel to give the impression of a color gradient. Indeed, the parts of the decor having less thickness of the second enamel, let, through transparency, pass part of the color of the first enamel giving the impression of an intermediate color.
  • A titre d'exemple, la pièce 21 de la figure 3 forme une carte céleste en couche d'émail 25 par-dessus une première couche d'émail blanche 24. Afin de présenter une variation du bleu clair au bleu foncé, une zone 22 comporte une épaisseur moindre du deuxième émail 25 que le reste du décor passant de la zone 22 du bleu clair vers le reste du décor en bleu foncé à partir du même type de couche d'émail 25.For example, Exhibit 21 of the figure 3 forms an enamel layer celestial card 25 over a first layer of white enamel 24. In order to present a variation of light blue to dark blue, an area 22 has a lower thickness of the second enamel 25 than the rest of the decor passing from zone 22 of the light blue towards the rest of the decor in dark blue from the same type of enamel layer 25.
  • Une deuxième possibilité peut consister à former plusieurs couches de couleurs différentes pour offrir une présentation plus raffinée dite « en dégradée ». Le décor 2' illustre à la figure 4 cette deuxième possibilité par au moins une couche d'un émail de couleur intermédiaire, laquelle couche est ensuite elle-même partiellement recouverte de ladite couche de deuxième émail tranchant d'avantage avec la couleur du premier émail. A titre d'exemple, il est ainsi envisageable, pour un premier émail de couleur blanche 4', de former successivement une couche intermédiaire d'émail 6' de couleur grise pour tout le décor 2' et une couche finale d'émail 8' de couleur noire au niveau des parties les plus larges du décor 2'.A second possibility may be to form several layers of different colors to offer a more refined presentation called "degraded". The decor 2 'illustrates the figure 4 this second possibility by at least one layer of an enamel of intermediate color, which layer is then itself partially covered with said layer of second enamel cutting edge with the color of the first enamel. By way of example, it is thus possible, for a first white enamel 4 ', to successively form a gray enamel intermediate layer 6' for all the decoration 2 'and a final layer of enamel 8' black in the widest parts of the decoration 2 '.
  • Selon l'invention, ladite au moins une autre couche est, de manière avantageuse, totalement ou partiellement recouverte d'une couche métallique afin que ledit décor présente une réflexion qui est homogène quelle que soit l'incidence lumineuse.According to the invention, said at least one other layer is, advantageously, totally or partially covered with a metal layer so that said decoration has a reflection that is homogeneous regardless of the light incidence.
  • En effet, si une couche métallique est formée directement sur une pièce émaillée, elle ne reflète pas la lumière et donc ne renvoie sa couleur que selon une seule incidence ce qui présente l'inconvénient d'une pièce émaillée au rendu haut de gamme avec des parties métalliques sombres sauf sous une incidence lumineuse particulière.Indeed, if a metal layer is formed directly on an enamelled piece, it does not reflect the light and therefore returns its color only by a single incidence which has the disadvantage of a high-end enamelled piece with dark metal parts except under a particular luminous incidence.
  • Avantageusement, après une mise en épaisseur réalisée selon l'invention, on forme une couche métallique par-dessus. En effet, la mise en épaisseur rend le décor sensiblement bombé et, une fois revêtu d'une couche de métal, renvoie une partie de sa couleur quelle que soit l'incidence lumineuse. On obtient donc un rendu métallique aussi haut de gamme que la première couche d'émail.Advantageously, after a thickness setting made according to the invention, a metal layer is formed on top. Indeed, the setting thickness makes the decor substantially curved and, once coated with a layer of metal, returns a portion of its color regardless of the light incidence. We thus obtain a metal rendering as high-end as the first layer of enamel.
  • Selon une alternative de ce mode de réalisation, la couche métallique recouvre toute la deuxième couche d'émail afin de présenter un décor totalement métallique comme un tour d'heure 2 de la figure 1 ou les constellations 23 de la figure 3. Bien entendu, il est ainsi possible de former, soit des surfaces entièrement revêtue comme la lune 13 de la figure 2, soit uniquement des contours revêtus comme les étoiles 15 de la figure 2 dont le centre est vide en rendant visible la première couche d'émail 12.According to an alternative of this embodiment, the metal layer covers the entire second layer of enamel in order to present a totally metallic decoration such as a time lapse 2 of the figure 1 or the constellations 23 of the figure 3 . Of course, it is thus possible to form either fully coated surfaces such as the moon 13 of the figure 2 , only contours coated like the stars 15 of the figure 2 whose center is empty by making visible the first layer of enamel 12.
  • Selon l'invention, la couche métallique recouvre partiellement la deuxième couche d'émail afin de présenter un décor comportant une partie métallique et une partie émaillée autre que la première couche d'émail comme la lune 17 de la figure 2 dont le visage est formé par des ajourages de la couche métallique en rendant visible la deuxième couche d'émail 14. Bien entendu, il est aussi possible de former des contours revêtus comme les étoiles 19 de la figure 2 dont le centre est ajouré pour laisser apparente la deuxième couche d'émail 16.According to the invention, the metal layer partially covers the second layer of enamel in order to present a decoration comprising a metal part and an enamelled part other than the first layer of enamel such as the moon 17 of the figure 2 whose face is formed by perforations of the metal layer making visible the second layer of enamel 14. Of course, it is also possible to form contours coated as the stars 19 of the figure 2 whose center is perforated to reveal the second layer of enamel 16.
  • On comprend donc que, de manière préférée selon l'invention, il est possible d'obtenir des pièces émaillées pour un cadran, c'est-à-dire le cadran lui-même ou une partie rapportée sur le cadran ou une partie similaire à un cadran, dont les décors, métallisés ou non, offrent un rendu global homogène par rapport à l'émaillage principal de la pièce, c'est-à-dire haut de gamme.It is thus understood that, in a preferred manner according to the invention, it is possible to obtain enamelled pieces for a dial, that is to say the dial itself or a portion attached to the dial or a part similar to a dial, whose decorations, metallized or not, provide a uniform overall rendering compared to the main enameling of the piece, that is to say top of the line.
  • La fabrication de la pièce émaillée selon l'invention sera mieux comprise en relation avec les figures 5 à 8. Le procédé selon l'invention se rapporte à la décoration d'une pièce émaillée pour un cadran, c'est-à-dire convenant à un cadran. Selon une première étape a) d'un premier mode de réalisation, le procédé consiste à former un substrat 31 en céramique dont la partie visible 32 est revêtue d'une première couche d'émail 33. Comme visible aux figures 5 et 6, la surface visible 32 n'est pas forcément plane et peut également comporter des plans supérieur(s) et/ou inférieur(s) (non représentés) comme expliqué ci-dessus.The manufacture of the enamelled piece according to the invention will be better understood in relation to the Figures 5 to 8 . The method according to the invention relates to the decoration of an enamelled piece for a dial, that is to say, suitable for a dial. According to a first step a) of a first embodiment, the method consists in forming a ceramic substrate 31 whose visible portion 32 is coated with a first enamel layer 33. As visible in FIGS. Figures 5 and 6 , the visible surface 32 is not necessarily flat and may also include upper (s) and / or lower (s) (not shown) as explained above.
  • Selon l'invention, le procédé se poursuit avec une ou plusieurs étape(s) b) consistant à former sélectivement une autre couche d'émail 35, 37, 39, 41, 43, 45 par-dessus de la première couche d'émail 33 afin de former un décor sur ladite surface visible 32 comme illustré à la figure 7. Ainsi, le nombre d'étapes b) dépend, comme expliqué ci-dessus, si on souhaite réaliser un décor avec une couche unique d'émail avec ou non 43, des épaisseurs différentes comme par exemple la signature « secrète » 9 de la figure 1 ou le fond 25 de la carte céleste de la figure 3, si on souhaite réaliser plusieurs décors avec une couche unique d'émail 39 avec, ou non, des épaisseurs différentes comme le tour d'heure 2 de la figure 2, si on souhaite réaliser un décor avec plusieurs couches d'émaux différents 35, 41 avec, ou non, des épaisseurs différentes comme le décor 2' de la figure 4 ou si on souhaite réaliser plusieurs décors avec plusieurs couches d'émail 37, 39, 41, 43, 45 différentes ou non et avec des épaisseurs différentes ou non comme la pièce 11 utilisée pour afficher des phases de lune.According to the invention, the process is continued with one or more step (s) b) of selectively forming another enamel layer 35, 37, 39, 41, 43, 45 over the first layer of enamel 33 to form a decoration on said visible surface 32 as illustrated in FIG. figure 7 . Thus, the number of steps b) depends, as explained above, if one wishes to achieve a decor with a single layer of enamel with or without 43, different thicknesses such as for example the "secret" signature 9 of the figure 1 or the bottom 25 of the celestial map of the figure 3 , if it is desired to make several decorations with a single layer of enamel 39 with or without different thicknesses such as the hour tower 2 of the figure 2 , if it is desired to create a decoration with several different enamel layers 35, 41 with or without different thicknesses, such as the decoration 2 'of the figure 4 or if it is desired to make several decorations with several layers of enamel 37, 39, 41, 43, 45 different or not and with different thicknesses or not as the part 11 used to display moon phases.
  • Préférentiellement selon l'invention, chaque étape b) comporte une première phase c) consistant à imprimer sélectivement, sur ladite première couche d'émail 33, le décor 35, 37, 39, 43, 45 ou sur une autre couche d'émail 35, le décor 41 à l'aide d'une solution précurseur de la future couche d'émail, puis, une deuxième phase d) consistant à chauffer la pièce afin transformer la solution précurseur en émail. Selon l'invention, la solution précurseur est formée de particules, comportant de la poudre d'émail et des pigments pour la future coloration, qui sont en suspension dans un solvant comme de l'huile.Preferably according to the invention, each step b) comprises a first phase c) of selectively printing, on said first enamel layer 33, the decoration 35, 37, 39, 43, 45 or on another layer enamel 35, the decor 41 with a precursor solution of the future enamel layer, then a second phase d) of heating the workpiece to transform the precursor solution into enamel. According to the invention, the precursor solution is formed of particles, comprising enamel powder and pigments for the future coloration, which are suspended in a solvent such as oil.
  • De plus, la température de transformation de la phase d) de chaque couche d'émail 37, 39, 41, 43, 45 supplémentaire est, de manière préférée, au moins 100°C moins élevée que celle de la première couche d'émail 33 afin de ne pas détériorer la première couche d'émail 33 existante lors de chaque étape b). Pour y arriver, on peut, par exemple, utiliser des émaux dits« petit feu » pour les décors 35, 37, 39, 41, 43, 45 et un émail dit « grand feu » pour la première couche 33. A titre d'exemple, l'émail « petit feu » peut par exemple réagir et vitrifier vers 600°C et l'émail « grand feu » autour de 1000°C. Cette différence de températures très supérieure à 100°C est choisie afin que, lors de l'échauffement de l'émail « petit feu », la structure de l'émail « grand feu » ne soit pas ou peu influencée.In addition, the transformation temperature of the phase d) of each additional enamel layer 37, 39, 41, 43, 45 is preferably at least 100 ° C. lower than that of the first enamel layer 33 so as not to damage the first layer of enamel 33 existing during each step b). To achieve this, one can, for example, use so-called "small fire" enamels for decorations 35, 37, 39, 41, 43, 45 and a glaze called "big fire" for the first layer 33. As for example, the enamel "small fire" can for example react and vitrify around 600 ° C and enamel "big fire" around 1000 ° C. This difference in temperature much higher than 100 ° C is chosen so that, during the heating of the enamel "small fire", the structure of enamel "big fire" is not influenced or little.
  • On comprend donc que, suivant le nombre de couches supplémentaires d'émaux 37, 39, 41, 43, 45 à ajouter sur la première couche 33, il préférable que choisir les températures caractéristiques de chacun des émaux ou de réaliser la consécutivité de chaque étape b) de la plus haute température de transformation à la plus basse. Ainsi, cela évitera aux couches d'émaux d'être fragilisées et/ou endommagées. A titre d'exemple, il est préféré d'utiliser un émail 41 qui vitrifie à une température plus basse que l'émail 35, lui-même vitrifiant à une température plus basse que le premier émail 33.It is therefore understood that, depending on the number of additional layers of enamels 37, 39, 41, 43, 45 to be added to the first layer 33, it is preferable to choose the characteristic temperatures of each of the enamels or to achieve the consecutivity of each step. b) from the highest transformation temperature to the lowest. Thus, it will prevent the enamel layers from being weakened and / or damaged. By way of example, it is preferred to use an enamel 41 which vitrifies at a lower temperature than the enamel 35, itself vitrifying at a lower temperature than the first enamel 33.
  • Afin de permettre une précision d'impression suffisante, la phase c) est, de manière préférée, réalisée par tampographie ou sérigraphie pour déposer nettement en contrastant au maximum les couches 35, 37, 39, 41, 43, 45 de couleur différente ou non à la première couche d'émail 33.In order to allow sufficient printing precision, the phase c) is, preferably, carried out by pad printing or screen printing in order to deposit the contrasting layers 35, 37, 39, 41, 43, 45 with a different color to a greater or lesser extent. at the first enamel layer 33.
  • Selon l'invention après les étapes a) et au moins une étape b), le procédé comporte une étape finale e) consistant à recouvrir totalement ladite une autre couche d'émail 39 d'une couche métallique 38 pour former par exemple la lune 13, les étoiles 15 ou les constellations 23 ou e') consistant à recouvrir seulement partiellement ladite une autre couche d'émail 37 d'une couche métallique 36 pour former la lune 17 avec le visage 14 ajouré ou les étoiles 19 avec les centres 16 ajourés.According to the invention after the steps a) and at least one step b), the method comprises a final step e) of completely covering said another layer of enamel 39 with a metal layer 38 to form, for example, the moon 13 , the stars 15 or constellations 23 or e ') consisting of covering only partially said another layer of enamel 37 with a metal layer 36 to form the moon 17 with the openwork face 14 or the stars 19 with the openwork centers 16 .
  • Préférentiellement selon l'invention, l'étape e) ou e') comporte une première phase f) consistant à recouvrir le décor ou seulement une partie à l'aide d'une solution du type colloïdale formée par un solvant et de la poudre métallique en suspension, puis, une deuxième phase g) consistant à chauffer la pièce afin d'évaporer le solvant et former une couche métallique homogène. Selon l'invention, la poudre métallique peut être à base d'un métal précieux comme de l'or ou du platine.Preferably according to the invention, step e) or e ') comprises a first phase f) of covering the decoration or only a part with a solution of the colloidal type formed by a solvent and metal powder in suspension, then, a second phase g) of heating the part to evaporate the solvent and form a homogeneous metal layer. According to the invention, the metal powder may be based on a precious metal such as gold or platinum.
  • Bien entendu, la présente invention ne se limite pas à l'exemple illustré mais est susceptible de diverses variantes et modifications qui apparaîtront à l'homme de l'art. En particulier, on comprend que les formes et dimensions des décors peuvent être totalement différentes sans que cela complique le procédé de fabrication. La portée de l'invention est définie seulement par les revendications annexées.Of course, the present invention is not limited to the illustrated example but is susceptible of various variations and modifications that will occur to those skilled in the art. In particular, it is understood that the shapes and dimensions of the decorations can be completely different without this complicating the manufacturing process. The scope of the invention is defined only by the appended claims.
  • De plus, comme expliqué ci-dessus, l'application de l'invention ne saurait se limiter au domaine de l'horlogerie mais s'applique à la décoration de toute pièce émaillée convenant à un cadran comme, de manière non limitative, un disque décoratif emboîté dans un bouton de manchette, dans une boucle d'oreille ou dans un pendentif.In addition, as explained above, the application of the invention can not be limited to the field of watchmaking but applies to the decoration of any enamelled piece suitable for a dial as, without limitation, a disk decorative embellished in a cufflink, in an earring or in a pendant.
  • Enfin, il est bien évident qu'une dernière couche peut éventuellement être déposée par une tampographie habituelle. A titre d'exemple, si une étape e) a été réalisée au lieu d'une étape e'), cette dernière étape de tampographie habituelle pourrait être utilisée, par exemple, pour dessiner un visage sur la lune 13.Finally, it is obvious that a last layer may optionally be deposited by usual pad printing. For example, if a step e) was performed instead of a step e '), this last usual pad printing step could be used, for example, to draw a face on the moon 13.
  • Claims (15)

    1. Enamelled part (3, 11, 21) for a dial comprising a ceramic substrate (31) coated with a first enamel layer (4', 12, 24, 33) to improve the appearance of said part, at least one other enamel layer (6', 8', 9, 14, 16, 25, 35, 37, 39, 41, 43, 45) partially covering the first enamel layer (4', 12, 24, 33), characterized in that said at least one other enamel layer (6', 8', 9, 14, 16, 25, 35, 37, 39, 41, 43, 45) is at least partially coated with a metallic layer (13, 15, 17, 19, 23, 36, 38) so that said decoration has a homogeneous reflection regardless of the incident light.
    2. Part according to the preceding claim, characterized in that said at least one other layer (39) is totally coated with a metallic layer (13, 15, 23, 38).
    3. Part according to claim 1 or 2, characterized in that said at least one other layer (6', 8', 14, 16, 25, 35, 37, 41, 43, 45) is of a different colour from the first enamel layer (4', 12, 24, 33).
    4. Part according to claim 1 or 2, characterized in that said at least one other layer is of substantially identical colour (9, 39) to the first enamel layer.
    5. Part according to any of the preceding claims, characterized in that said at least one other layer (37, 39) has a variable thickness in order to offer colour shading.
    6. Part according to any of the preceding claims, characterized in that said decoration forms at least one alphanumerical symbol.
    7. Part according to any of claims 1 to 5, characterized in that said decoration forms at least one drawing.
    8. Timepiece characterized in that it includes at least one enamelled part according to any of claims 1 to 7.
    9. Method of fabricating an enamelled part (3, 11, 21) for a dial comprising the following steps:
      a) providing a ceramic based substrate the visible portion (32) of which is coated with a first enamel layer (4', 12, 24, 33);
      b) selectively forming one other enamel layer (6', 8', 9, 14, 16, 25, 35, 37, 39, 41, 43, 45) on top of the first enamel layer (4', 12, 24, 33) so as to form a decoration on said visible surface;
      characterized in that it includes the following step:
      e')at least partially coating said one other enamel layer (6', 8', 9, 14, 16, 25, 35, 37, 39, 41, 43, 45) with a metallic layer (13, 15,17,19, 23, 36, 38) so that said decoration has a homogeneous reflection regardless of the incident light.
    10. Method according to the preceding claim, characterized in that said at least one other layer (6', 8', 9, 14, 16, 25, 35, 37, 39, 41, 43, 45) has a variable thickness so as to offer colour shading.
    11. Method according to claim 9 or 10, characterized in that step b) includes the following phases:
      c) selectively printing said decoration on said first enamel layer using a precursor solution of said one other enamel layer;
      d) heating the part to transform the precursor solution into enamel.
    12. Method according to the preceding claim, characterized in that the transformation temperature of said one other enamel layer is at least 100°C lower than that of the first enamel layer to avoid damaging said first layer in each step b).
    13. Method according to claim 11 or 12, characterized in that phase c) is achieved by pad printing or silk screen printing.
    14. Method according to any of claims 9 to 13, characterized in that said one other layer (6', 8', 14, 16, 25, 35, 37, 41, 43, 45) is a different colour from the first enamel layer.
    15. Method according to any of claims 9 to 13, characterized in that said one other layer (9, 39) is of substantially identical colour to the first enamel layer
    EP12157581.5A 2011-03-23 2012-02-29 Decorated enamelled part Active EP2503415B1 (en)

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    EP12157581.5A EP2503415B1 (en) 2011-03-23 2012-02-29 Decorated enamelled part

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    EP12157581.5A EP2503415B1 (en) 2011-03-23 2012-02-29 Decorated enamelled part

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    EP2503415B1 true EP2503415B1 (en) 2014-09-17

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    CH708654A2 (en) * 2013-10-01 2015-04-15 Rado Montres Sa A method of manufacturing an inlaid ceramic element of a timepiece and timepieces including such elements.
    USD787344S1 (en) * 2014-08-26 2017-05-23 Van Cleef & Arpels SA Watch
    EP3181006A1 (en) * 2015-12-18 2017-06-21 The Swatch Group Research and Development Ltd. Zirconia panel element with selective colouring
    JP1599798S (en) * 2016-11-02 2018-03-19
    US10081164B1 (en) 2017-03-24 2018-09-25 Ford Motor Company Glass substrate with pigmented ceramic enamel layer

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    US2716829A (en) * 1953-02-05 1955-09-06 Huguenin & Cie Time piece dials
    US3086880A (en) * 1961-05-08 1963-04-23 Gladding Mcbean & Co Method of producing a glazed ceramic article and the glazed article
    FR2432942A1 (en) * 1978-08-11 1980-03-07 Zeder Armand Producing enamelled plaques and medallions - by firing one enamel coat before inscribing second coat to reveal base coating
    US5912064A (en) * 1995-04-07 1999-06-15 Citizen Watch Co., Ltd. Dial plate for solar battery powered watch
    JP2938576B2 (en) * 1995-04-07 1999-08-23 シチズン時計株式会社 Solar powered clock dial
    US5972233A (en) * 1996-01-31 1999-10-26 Refractal Design, Inc. Method of manufacturing a decorative article
    JP2003098272A (en) * 2001-07-17 2003-04-03 Casio Comput Co Ltd Electronic equipment, and liquid crystal display
    DE60320805D1 (en) * 2003-12-03 2008-06-19 Asulab Sa Enamelled dial with set feet and manufacturing process for it
    EP1640822B1 (en) 2004-09-22 2012-08-01 Asulab S.A. Multi-level enamelled watch face
    JP2007046984A (en) * 2005-08-09 2007-02-22 Citizen Seimitsu Co Ltd Decorative member, display board provided with the same decorative member, and its manufacturing method
    EP2365404A1 (en) * 2010-03-12 2011-09-14 The Swatch Group Research and Development Ltd. Dial at least partially enamelled with raised pattern

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    US20120244326A1 (en) 2012-09-27
    EP2503415A1 (en) 2012-09-26
    HK1176414A1 (en) 2013-07-26
    RU2012111045A (en) 2013-09-27
    US9012016B2 (en) 2015-04-21
    CN102692861A (en) 2012-09-26
    JP2012202997A (en) 2012-10-22
    JP5350509B2 (en) 2013-11-27
    CN102692861B (en) 2015-02-25

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