EP3913444A1 - Method for manufacturing clock components for timepieces - Google Patents

Method for manufacturing clock components for timepieces Download PDF

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Publication number
EP3913444A1
EP3913444A1 EP20175197.1A EP20175197A EP3913444A1 EP 3913444 A1 EP3913444 A1 EP 3913444A1 EP 20175197 A EP20175197 A EP 20175197A EP 3913444 A1 EP3913444 A1 EP 3913444A1
Authority
EP
European Patent Office
Prior art keywords
base
applique
layer
machined
varnish
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.)
Pending
Application number
EP20175197.1A
Other languages
German (de)
French (fr)
Inventor
Gérard Rossier
Marie Baudoz
François-Xavier Dubus
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.)
Universo SA
Original Assignee
Universo 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 Universo SA filed Critical Universo SA
Priority to EP20175197.1A priority Critical patent/EP3913444A1/en
Priority to US17/233,691 priority patent/US20210356912A1/en
Priority to JP2021072325A priority patent/JP2021181981A/en
Priority to KR1020210063704A priority patent/KR102667030B1/en
Priority to CN202110550650.3A priority patent/CN113687588B/en
Publication of EP3913444A1 publication Critical patent/EP3913444A1/en
Priority to JP2023136979A priority patent/JP2023153383A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • G04B19/10—Ornamental shape of the graduations or the surface of the dial; Attachment of the graduations to the dial
    • G04B19/103—Ornamental shape of the graduations or the surface of the dial; Attachment of the graduations to the dial attached or inlaid numbers
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0002—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe
    • G04D3/0043—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the time-indicating mechanisms
    • G04D3/0048—Watchmakers' 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
    • 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
    • G04B19/10—Ornamental shape of the graduations or the surface of the dial; Attachment of the graduations to the dial
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0069—Watchmakers' or watch-repairers' machines or tools for working materials for working with non-mechanical means, e.g. chemical, electrochemical, metallising, vapourising; with electron beams, laser beams
    • 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
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0002—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe
    • G04D3/0043—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the time-indicating mechanisms
    • G04D3/0051—Watchmakers' 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 time markers
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0074—Watchmakers' or watch-repairers' machines or tools for working materials for treatment of the material, e.g. surface treatment
    • G04D3/0092—Watchmakers' or watch-repairers' machines or tools for working materials for treatment of the material, e.g. surface treatment for components of the time-indicating mechanism, e.g. dials
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/02—Lathes, with one or more supports; Burnishing machines, with one or more supports
    • G04D3/0227—Lathes, with one or more supports; Burnishing machines, with one or more supports for the manufacture of special components for clockworks
    • G04D3/0272—Lathes, with one or more supports; Burnishing machines, with one or more supports for the manufacture of special components for clockworks for components of the time-indicating mechanism, e.g. dials
    • 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
    • G04B45/0076—Decoration of the case and of parts thereof, e.g. as a method of manufacture thereof
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49579—Watch or clock making
    • Y10T29/49583—Watch or clock making having indicia, face, or dial

Definitions

  • the present invention relates to a method of manufacturing watch components, and more particularly to varnished appliques intended to be attached to the dial of a timepiece by means of fixing feet to replace all or part of the numbers indicating the hours. Such a process can also be used to produce a dial or a bezel.
  • the appliques arranged on the hour circle, or on secondary dials, are most often produced by transfer, or even by screen printing, giving the impression of having been printed.
  • Clockwork appliques are essential elements of a timepiece, in particular a watch, helping to give it a particular appearance.
  • their execution must be particularly careful, very reproducible, and free from any defect in surface finish. Perfect execution is made difficult by the very small size of these appearance components, and their difficult grip. Therefore the reject rate can be high.
  • This production is even more delicate when the wall lights have a coating such as varnish or lacquer, to obtain a particular aesthetic effect.
  • varnished wall lights it is known practice to place the wall light on a support and to apply a layer of varnish to it. It will be understood that, in this case, varnish is deposited both on the applique and on the support. A joint is then formed between the applique and the support by capillary effect, the appearance is then mediocre which is not admissible.
  • An aim of the present invention is to overcome all or part of the drawbacks mentioned above by providing a method making it possible to manufacture high quality watch appliques while ensuring a perfect surface condition of the visible parts.
  • the invention also relates to a watch comprising at least one applique according to the invention.
  • the invention relates to a method of manufacturing a horological applique 1.
  • applique any display or decorative element, intended to be seen by a user, such as a sign, index, number, logo, monogram, or the like, placed on an object, in particular a dial, a flange, a plate, a bridge, or the like.
  • Such an applique 1 usually comprises an upper surface 2 and a periphery 3 intended to be seen by a user, a lower surface 4 for its support on a dial or a structure of a timepiece.
  • this lower surface 4 can be directly glued to such a dial or such a structure, it generally comprises at least one foot 5.
  • Each foot 5 protrudes from this lower surface 4, and more particularly but not limited to a particular orientation in the 'space relative to the lower surface 4, for its attachment to such a dial or such a structure.
  • the upper surface 2 and the periphery 3 of the applique 1 can be more or less complex, and include for example several elementary surfaces such as plane facets, or the like.
  • the machining and / or diamond coating of the upper surface 2 is carried out with a machining and / or diamond coating unit mobile along at least 5 axes relative to the base.
  • the base 10 is made from a metallic material or metallic alloy such as brass, aluminum or a precious metal.
  • the base 10 also serves as a support for the applique 1 during the manufacturing process until the lower surface 4 and the foot 5 are machined.
  • the machining of the upper surface 2 and of the periphery 3 of the applique 1 in the base 10 is carried out from the upper face of the latter, the machining having a predefined depth P.
  • the depth P of the machining is expected to be greater than the final height H of the applique 1.
  • the machined base 10 is washed via an ultrasonic washing, so as to remove all the dust and residues associated with the machining and avoid any defect in the varnish layer.
  • a brightening of the upper surface 2 and of the periphery is carried out. 3 of the applique 1 machined in the base 10 so as to polish the edges of the applique and improve the covering power of the varnish.
  • a new washing step is carried out following brightening, the base is then washed by means of electrolytic washing.
  • the base may receive a surface treatment to promote the strength of the layer of varnish, such treatment may consist of a sandblasting or plasma operation, for example.
  • a new washing step may then be necessary to remove the impurities present.
  • a layer of varnish 13 is deposited on the machined upper face of the base 10 so as to cover the upper face of the base, and implicitly the upper surface 2 and the periphery 3 of the 'applique 1.
  • the layer of varnish is deposited by means of a spraying operation, one could also carry out a soaking of the base.
  • the layer of varnish has a sufficient thickness to cover the applique, typically the thickness is between 20 ⁇ m and 100 ⁇ m.
  • This layer of varnish 13 is then dried in an oven at 80 ° C. for 30 min, then at 140 ° C. for 60 min. Drying in two stages makes it possible to obtain a slow and regular polymerization and thus a better homogeneity of the thickness of the varnish. Obviously, the parameters of this drying step can be made to vary according to the specificities requested by the manufacturer.
  • a layer of glue 14 is deposited on the upper face of the base 10, the layer of glue 14 then being superimposed on the layer of varnish 13 and enveloping the upper surface 2 and the periphery 3 of the applique 1.
  • the adhesive layer 14 is deposited over at least the entire depth of the machining, or even slightly more so as to exceed the plane formed by the upper face of the base.
  • a water-based glue of the Prolaq® type is used to avoid damaging the varnish when dissolving the glue in a later step.
  • the next step consists in drying the deposited layer of glue 14, in order to do this, the base coated with glue is placed in an oven at 45 ° C. for at least 5 hours.
  • the glue layer 14 is machined by means of surfacing for example, so as to obtain a uniform layer, to accelerate the release of the applique at the end of the process, and to form a flat reference surface for the dimensional during machining of the underside
  • the lower surface 4 and the foot 5 of the applique 1 are machined via the lower face 12 of the base 10. This machining is carried out over a depth P 'greater than the thickness E of the base 10 minus the machined depth P of the upper face, ie P '> (EP).
  • the machining of the bracket 1 from the underside of the base is carried out to dimensions slightly greater than the periphery 3 of the bracket 1 so as to separate the bracket from the base, the bracket thus formed n ' being no longer linked to the base 10 and then only being held by the layer of adhesive 14 previously deposited.
  • the base is immersed in an aqueous solution to dissolve the glue and release the applique from the layer of glue.
  • the base 10 is bathed in the solution in a basket in order to be able to easily recover the released applique.
  • the liquid solution used is an alkaline aqueous solution to dissolve the glue, the base 10 being immersed in a succession of leaching baths at 55 ° C for 60 min so as to ensure good dissolution of the glue.
  • the liquid solution used is an alkaline aqueous solution to dissolve the glue, the base 10 being immersed in a succession of leaching baths at 55 ° C for 60 min so as to ensure good dissolution of the glue.
  • other liquid solutions can be used depending on the glue chosen, any as the wash-out time and the temperature of the aqueous solution may vary depending on the glue used.
  • the wall lamp can also receive other decorative treatments such as the deposition of a luminescent material.
  • the applique is packaged on a storage pallet for delivery.
  • the invention also relates to a watch comprising at least one applique 1
  • a watch comprising at least one applique 1
  • the present invention is not limited to the example illustrated and is susceptible of various variants and modifications which will appear to those skilled in the art.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Manufacturing & Machinery (AREA)
  • Adornments (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention se rapporte à un procédé de fabrication d'une applique comportant une surface supérieure et un pourtour destinés à être vus par un utilisateur, une surface inférieure pour son appui sur un cadran ou une structure d'une pièce d'horlogerie et au moins un pied saillant de la surface inférieure, le procédé permettant d'obtenir une applique vernie.The invention relates to a method of manufacturing an applique comprising an upper surface and a periphery intended to be seen by a user, a lower surface for its support on a dial or a structure of a timepiece and the minus one foot protruding from the lower surface, the process making it possible to obtain a varnished wall lamp.

Description

Domaine de l'inventionField of the invention

La présente invention concerne un procédé de fabrication de composants horlogers, et plus particulièrement des appliques vernies destinées à être rapportées sur le cadran d'une pièce d'horlogerie au moyen de pieds de fixation pour remplacer tout ou partie des chiffres indiquant les heures. Un tel procédé peut également servir à la réalisation de cadran ou de lunette.The present invention relates to a method of manufacturing watch components, and more particularly to varnished appliques intended to be attached to the dial of a timepiece by means of fixing feet to replace all or part of the numbers indicating the hours. Such a process can also be used to produce a dial or a bezel.

Arrière-plan de l'inventionBackground of the invention

Les appliques disposées sur le tour d'heures, ou sur des cadrans secondaires, sont le plus souvent réalisées par décalque, voire par sérigraphie en donnant l'impression d'avoir été imprimés. Les appliques d'horlogerie sont des éléments essentiels d'une pièce d'horlogerie, en particulier d'une montre, en contribuant à lui donner une physionomie particulière. De ce fait, leur exécution doit être particulièrement soignée, très reproductible, et dépourvue de tout défaut d'état de surface. Une exécution parfaite est rendue difficile par la très petite taille de ces composants d'aspect, et par leur préhension difficile. De ce fait le taux de rebut peut être élevé. Cette fabrication est encore plus délicate quand les appliques présentent un revêtement tel que du verni ou de la laque, pour obtenir un effet esthétique particulier. Dans le cas d'applique vernies, il est connu de déposer l'applique sur un support et d'y appliquer une couche de verni. On comprend que, dans ce cas, du verni est déposé à la fois sur l'applique et sur le support. Il se forme alors une jointure entre l'applique et le support par effet de capillarité, l'aspect est alors médiocre ce qui n'est pas admissible.The appliques arranged on the hour circle, or on secondary dials, are most often produced by transfer, or even by screen printing, giving the impression of having been printed. Clockwork appliques are essential elements of a timepiece, in particular a watch, helping to give it a particular appearance. As a result, their execution must be particularly careful, very reproducible, and free from any defect in surface finish. Perfect execution is made difficult by the very small size of these appearance components, and their difficult grip. Therefore the reject rate can be high. This production is even more delicate when the wall lights have a coating such as varnish or lacquer, to obtain a particular aesthetic effect. In the case of varnished wall lights, it is known practice to place the wall light on a support and to apply a layer of varnish to it. It will be understood that, in this case, varnish is deposited both on the applique and on the support. A joint is then formed between the applique and the support by capillary effect, the appearance is then mediocre which is not admissible.

Résumé de l'inventionSummary of the invention

Un but de la présente invention est de pallier tout ou partie des inconvénients cités précédemment en fournissant un procédé permettant de fabriquer des appliques d'horlogerie de grande qualité en assurant un état de surface parfait des parties visibles.An aim of the present invention is to overcome all or part of the drawbacks mentioned above by providing a method making it possible to manufacture high quality watch appliques while ensuring a perfect surface condition of the visible parts.

A cet effet, l'invention concerne un procédé de fabrication d'applique qui comprend les étapes suivantes selon lesquelles :

  • On réalise une embase en un matériau métallique, ladite embase présentant une face supérieure et une face inférieure ;
  • On usine la surface supérieure et le pourtour de l'applique dans l'embase depuis la face supérieure, avec une profondeur prédéfinie-;
  • On lave l'embase usinée ;
  • on dépose une couche de verni, laque ou peinture sur la face supérieure usinée de l'embase de manière à couvrir la face supérieure ;
  • On fait sécher la couche de vernis déposée ;
  • On dépose, sur au moins toute la profondeur de l'usinage, une couche de colle sur la face supérieure de l'embase, ladite couche de colle étant superposée sur la couche de vernis, et on fait sécher la colle ;
  • On usine la surface inférieure et le pied de l'applique par la face inférieure de l'embase avec une profondeur supérieure à l'épaisseur de l'embase moins la profondeur usinée de la face supérieure, l'applique ainsi formée étant maintenue dans la couche de colle ;
  • On plonge l'embase dans un bain pour dissoudre la colle et libérer l'applique ;
  • On conditionne l'applique en vue de sa livraison.
To this end, the invention relates to a method of manufacturing an applique which comprises the following steps according to which:
  • A base is produced from a metallic material, said base having an upper face and a lower face;
  • The upper surface and the periphery of the applique are machined in the base from the upper face, with a predefined depth;
  • The machined base is washed;
  • a layer of varnish, lacquer or paint is deposited on the machined upper face of the base so as to cover the upper face;
  • The deposited layer of varnish is dried;
  • A layer of glue is deposited over at least the entire depth of the machining on the upper face of the base, said layer of glue being superimposed on the layer of varnish, and the glue is dried;
  • The lower surface and the foot of the applique are machined from the lower face of the base with a depth greater than the thickness of the base minus the machined depth of the upper face, the applique thus formed being held in the layer of glue;
  • The base is immersed in a bath to dissolve the glue and release the applique;
  • The applique is packaged for delivery.

Conformément à d'autres variantes avantageuses de l'invention :

  • Le procédé de fabrication comprend une étape d'avivage de la surface supérieure et du pourtour de l'applique usinée dans l'embase, afin de garantir une dépose homogène de la couche de vernis et s'affranchir des arêtes vives qui laissent apparaitre un éclaircissement de la couleur ;
  • L'avivage est suivi d'une étape de lessivage électrolytique de l'embase afin d'assurer la propreté du support ;
  • La couche de vernis présente une épaisseur comprise entre 20 µm et 100 µm ;
  • La couche de vernis est séchée de préférence à 80°C pendant 30 min, puis à 140°C pendant 60 min ;
  • L'embase est formée d'un matériau métallique tel que le laiton, l'aluminium, le cuivre ou métal précieux ;
  • La couche de colle est séchée en étuve de préférence à 45°C pendant 5 heures ;
  • Le bain de décollage de l'embase est effectué dans un panier ;
  • On réalise une étape de surfaçage de la couche de colle pour obtenir une surface de référence pour le dimensionnel lors de l'usinage de la face inférieure ;
  • L'usinage de l'applique par la face inférieure de l'embase est effectué sous ledit au moins un élément d'habillage et à des dimensions légèrement supérieures au pourtour de l'applique ;
  • Au moins un pied est formé pour l'applique en même temps que l'usinage par la face inférieure de l'embase pour former la face inférieure de l'applique.
In accordance with other advantageous variants of the invention:
  • The manufacturing process includes a step of brightening the upper surface and the periphery of the applique machined in the base, in order to guarantee a homogeneous deposit of the layer of varnish and to overcome the sharp edges which let appear a lightening. color;
  • Brightening is followed by an electrolytic leaching step of the base in order to ensure the cleanliness of the support;
  • The layer of varnish has a thickness of between 20 μm and 100 μm;
  • The varnish layer is preferably dried at 80 ° C for 30 min, then at 140 ° C for 60 min;
  • The base is formed from a metallic material such as brass, aluminum, copper or precious metal;
  • The adhesive layer is dried in an oven, preferably at 45 ° C. for 5 hours;
  • The take-off bath from the base is carried out in a basket;
  • A step of surfacing the adhesive layer is carried out in order to obtain a reference surface for the dimensional during the machining of the lower face;
  • The machining of the wall lamp from the underside of the base is carried out under said at least one covering element and at dimensions slightly greater than the periphery of the wall lamp;
  • At least one foot is formed for the applique at the same time as the machining by the lower face of the base to form the underside of the applique.

L'invention concerne également une montre comprenant au moins une applique conforme à l'invention.The invention also relates to a watch comprising at least one applique according to the invention.

Grâce à ces caractéristiques, un tel procédé de fabrication d'une applique horlogère permet d'obtenir des appliques rapidement tout en ayant un état de surface parfait des parties visibles.Thanks to these characteristics, such a method of manufacturing a horological wall light makes it possible to obtain wall lights quickly while having a perfect surface condition of the visible parts.

Description sommaire des dessinsBrief description of the drawings

D'autres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lecture de la description suivante d'un mode de réalisation particulier de l'invention, donné à titre de simple exemple illustratif et non limitatif, et des figures annexées, parmi lesquelles :

  • Les figures 1 à 6 illustrent différentes étapes du procédé de fabrication conforme à l'invention ;
  • La figure 7 est une vue de dessus d'une embase dont la face supérieure a été usinée ;
  • Les figures 8 et 9 sont respectivement des vues en coupe d'une embase usinée par la face supérieure, et d'une embase ayant reçue une couche de verni ;
  • La figure 10 est une vue en perspective d'une embase usinée par la face supérieure.
Other characteristics and advantages of the invention will emerge more clearly on reading the following description of a particular embodiment of the invention, given by way of simple illustrative and non-limiting example, and the appended figures, among which :
  • The figures 1 to 6 illustrate different steps of the manufacturing process according to the invention;
  • The figure 7 is a top view of a base whose upper face has been machined;
  • The figures 8 and 9 are respectively sectional views of a base machined from the upper face, and of a base having received a layer of varnish;
  • The figure 10 is a perspective view of a base machined from the upper face.

Description détaillée des modes de réalisation préférésDetailed description of the preferred embodiments

L'invention concerne un procédé de fabrication d'une applique 1 d'horlogerie.The invention relates to a method of manufacturing a horological applique 1.

Par « applique » on entend tout élément d'affichage ou de décoration, destiné à être vu par un utilisateur, tel que signe, index, chiffre, logo, monogramme, ou similaire, posé sur un objet, notamment un cadran, un rehaut, une platine, un pont, ou similaire.By "applique" is meant any display or decorative element, intended to be seen by a user, such as a sign, index, number, logo, monogram, or the like, placed on an object, in particular a dial, a flange, a plate, a bridge, or the like.

Une telle applique 1 comporte usuellement une surface supérieure 2 et un pourtour 3 destinés à être vue par un utilisateur, une surface inférieure 4 pour son appui sur un cadran ou une structure d'une pièce d'horlogerie.Such an applique 1 usually comprises an upper surface 2 and a periphery 3 intended to be seen by a user, a lower surface 4 for its support on a dial or a structure of a timepiece.

Si cette surface inférieure 4 peut être directement collée sur un tel cadran ou une telle structure, elle comporte généralement au moins un pied 5. Chaque pied 5 est saillant de cette surface inférieure 4, et plus particulièrement mais non limitativement selon une orientation particulière dans l'espace par rapport à la surface inférieure 4, pour sa fixation sur un tel cadran ou une telle structure.If this lower surface 4 can be directly glued to such a dial or such a structure, it generally comprises at least one foot 5. Each foot 5 protrudes from this lower surface 4, and more particularly but not limited to a particular orientation in the 'space relative to the lower surface 4, for its attachment to such a dial or such a structure.

Selon l'invention, pour la fabrication d'une telle applique 1, on réalise successivement les étapes suivantes :

  • on réalise une embase 10 en un matériau métallique, l'embase présentant une face supérieure 11 et une face inférieure 12 ;
  • on usine la surface supérieure 2 et le pourtour 3 de l'applique 1 dans l'embase depuis la face supérieure, avec une profondeur P prédéfinie-;
  • on lave l'embase 10 usinée ;
  • on dépose une couche de vernis 13 sur la face supérieure usinée de l'embase 10 de manière à couvrir la face supérieure ;
  • on fait sécher la couche de vernis 13 déposée ;
  • on dépose, sur au moins toute la profondeur de l'usinage, une couche de colle 14 sur la face supérieure de l'embase 10, la couche de colle 14 étant superposée sur la couche de vernis 13, et on fait sécher la colle ;
  • on usine la surface inférieure 4 et le pied 5 de l'applique 1 par la face inférieure 12 de l'embase 10 avec une profondeur P' supérieure à l'épaisseur E de l'embase moins la profondeur P usinée de la face supérieure, l'applique ainsi formée étant maintenue dans la couche de colle ;
  • on plonge l'embase 10 dans un bain pour dissoudre la colle et libérer l'applique 1 ;
  • on conditionne l'applique 1 en vue de sa livraison.
According to the invention, for the manufacture of such an applique 1, the following steps are successively carried out:
  • a base 10 is produced from a metallic material, the base having an upper face 11 and a lower face 12;
  • the upper surface 2 and the periphery 3 of the applique 1 are machined in the base from the upper face, with a predefined depth P;
  • the machined base 10 is washed;
  • a layer of varnish 13 is deposited on the machined upper face of the base 10 so as to cover the upper face;
  • the deposited layer of varnish 13 is dried;
  • a layer of glue 14 is deposited over at least the entire depth of the machining on the upper face of the base 10, the layer of glue 14 being superimposed on the layer of varnish 13, and the glue is dried;
  • the lower surface 4 and the foot 5 of the applique 1 are machined via the lower face 12 of the base 10 with a depth P 'greater than the thickness E of the base minus the machined depth P of the upper face, the applique thus formed being held in the adhesive layer;
  • the base 10 is immersed in a bath to dissolve the glue and release the applique 1;
  • the applique 1 is conditioned for delivery.

L'usinage de la surface supérieure 2 et du pourtour 3 par une machine CNC pour réaliser la surface supérieure 2 et le pourtour 3, peut-être, selon le cas, réalisé sur un outillage unique, ou bien sur une pluralité d'outillages, chacun spécifique à une opération d'usinage d'une surface particulière. L'usinage peut bien évidemment mettre en œuvre différentes technologies, combinées ou non, et non limitativement : fraisage, rectification, électroérosion, laser, ou autre.The machining of the upper surface 2 and of the periphery 3 by a CNC machine to produce the upper surface 2 and the periphery 3, perhaps, depending on the case, carried out on a single tool, or else on a plurality of tools, each specific to a machining operation of a particular surface. Machining can obviously implement different technologies, combined or not, and not limited to: milling, grinding, electroerosion, laser, or other.

Naturellement la surface supérieure 2 et le pourtour 3 de l'applique 1 peut être plus ou moins complexe, et comporter par exemple plusieurs surfaces élémentaires telles que des facettes planes, ou autre. Selon la complexité de la surface supérieure, on réalise l'usinage et/ou le diamantage de la surface supérieure 2 avec une unité d'usinage et/ou de diamantage mobile selon au moins 5 axes par rapport à l'embase.Naturally, the upper surface 2 and the periphery 3 of the applique 1 can be more or less complex, and include for example several elementary surfaces such as plane facets, or the like. Depending on the complexity of the upper surface, the machining and / or diamond coating of the upper surface 2 is carried out with a machining and / or diamond coating unit mobile along at least 5 axes relative to the base.

L'embase 10 est réalisée à partir d'un matériau métallique ou alliage métallique tel que du laiton, de l'aluminium ou un métal précieux. L'embase 10 sert également de support pour l'applique 1 au cours du procédé de fabrication jusqu'à ce que la surface inférieure 4 et le pied 5 soient usinés.The base 10 is made from a metallic material or metallic alloy such as brass, aluminum or a precious metal. The base 10 also serves as a support for the applique 1 during the manufacturing process until the lower surface 4 and the foot 5 are machined.

Selon une caractéristique particulière de l'invention, l'usinage de la surface supérieure 2 et du pourtour 3 de l'applique 1 dans l'embase 10 est effectué depuis la face supérieure de cette dernière, l'usinage ayant une profondeur P prédéfinie. Avantageusement, la profondeur P de l'usinage est prévue supérieure à la hauteur finale H de l'applique 1.According to a particular characteristic of the invention, the machining of the upper surface 2 and of the periphery 3 of the applique 1 in the base 10 is carried out from the upper face of the latter, the machining having a predefined depth P. Advantageously, the depth P of the machining is expected to be greater than the final height H of the applique 1.

Selon une caractéristique particulière de l'invention, après la réalisation de la surface supérieure 2 et du pourtour 3, on lave l'embase 10 usinée via un lavage à ultrason, de façon à éliminer toutes les poussières et résidus liés à l'usinage et éviter tout défaut dans la couche de vernis.According to a particular characteristic of the invention, after producing the upper surface 2 and the periphery 3, the machined base 10 is washed via an ultrasonic washing, so as to remove all the dust and residues associated with the machining and avoid any defect in the varnish layer.

Plus particulièrement, selon une caractéristique particulière de l'invention, on effectue un avivage de la surface supérieure 2 et du pourtour 3 de l'applique 1 usinée dans l'embase 10 de manière à polir les arrêtes de l'applique et améliorer le pouvoir couvrant du vernis.More particularly, according to a particular characteristic of the invention, a brightening of the upper surface 2 and of the periphery is carried out. 3 of the applique 1 machined in the base 10 so as to polish the edges of the applique and improve the covering power of the varnish.

Une nouvelle étape de lavage est effectuée à la suite de l'avivage, l'embase est alors lavée par le biais d'un lessivage électrolytique.A new washing step is carried out following brightening, the base is then washed by means of electrolytic washing.

Selon une variante de l'invention, l'embase peut recevoir un traitement de surface pour favoriser la tenue de la couche de vernis, un tel traitement peut consister en une opération de sablage ou de plasma par exemple. Une nouvelle étape de lavage peut alors être nécessaire pour éliminer les impuretés présentes.According to a variant of the invention, the base may receive a surface treatment to promote the strength of the layer of varnish, such treatment may consist of a sandblasting or plasma operation, for example. A new washing step may then be necessary to remove the impurities present.

Selon une caractéristique particulière de l'invention, on dépose une couche de vernis 13 sur la face supérieure usinée de l'embase 10 de manière à couvrir la face supérieure de l'embase, et implicitement la surface supérieure 2 et le pourtour 3 de l'applique 1. La couche de vernis est déposée par le biais d'une opération de giclage, on pourrait également effectuer un trempage de l'embase. La couche de vernis présente une épaisseur suffisante pour couvrir l'applique, typiquement l'épaisseur est comprise entre 20 µm et 100 µm.According to a particular characteristic of the invention, a layer of varnish 13 is deposited on the machined upper face of the base 10 so as to cover the upper face of the base, and implicitly the upper surface 2 and the periphery 3 of the 'applique 1. The layer of varnish is deposited by means of a spraying operation, one could also carry out a soaking of the base. The layer of varnish has a sufficient thickness to cover the applique, typically the thickness is between 20 μm and 100 μm.

Puis, on sèche cette couche de vernis 13 dans une étuve à 80°C pendant 30 min, puis à 140°C pendant 60 min. Un séchage en deux étapes permet d'obtenir une polymérisation lente et régulière et ainsi une meilleure homogénéité de l'épaisseur du verni. Bien évidemment, les paramètres de cette étape de séchage peuvent être amenés à varier selon les spécificités demandées par le fabricant.This layer of varnish 13 is then dried in an oven at 80 ° C. for 30 min, then at 140 ° C. for 60 min. Drying in two stages makes it possible to obtain a slow and regular polymerization and thus a better homogeneity of the thickness of the varnish. Obviously, the parameters of this drying step can be made to vary according to the specificities requested by the manufacturer.

Selon une caractéristique particulière de l'invention, on dépose une couche de colle 14 sur la face supérieure de l'embase 10, la couche de colle 14 étant alors superposée sur la couche de vernis 13 et enveloppe la surface supérieure 2 et le pourtour 3 de l'applique 1. Avantageusement, la couche de colle 14 est déposée sur au moins toute la profondeur de l'usinage, voire légèrement plus de manière à dépasser le plan former par la face supérieure de l'embase. De préférence, une colle à l'eau de type Prolaq® est utilisée pour éviter d'endommager le vernis lors de la dissolution de la colle dans une étape ultérieure.According to a particular characteristic of the invention, a layer of glue 14 is deposited on the upper face of the base 10, the layer of glue 14 then being superimposed on the layer of varnish 13 and enveloping the upper surface 2 and the periphery 3 of the applique 1. Advantageously, the adhesive layer 14 is deposited over at least the entire depth of the machining, or even slightly more so as to exceed the plane formed by the upper face of the base. Preferably, a water-based glue of the Prolaq® type is used to avoid damaging the varnish when dissolving the glue in a later step.

L'étape suivante consiste à faire sécher la couche de colle 14 déposée, pour se faire l'embase enduite de colle est placée dans une étuve à 45°C pendant au moins 5 heures.The next step consists in drying the deposited layer of glue 14, in order to do this, the base coated with glue is placed in an oven at 45 ° C. for at least 5 hours.

Une fois la couche de colle 14 sèche, une étape optionnelle de mise à niveau est effectuée. La couche de colle est usinée par le biais d'un surfaçage par exemple, de manière à obtenir une couche uniforme, à accélérer la libération de l'applique à la fin du procédé, et à former une surface de référence plane pour le dimensionnel lors de l'usinage de la face inférieureOnce the glue layer 14 dries, an optional leveling step is performed. The glue layer is machined by means of surfacing for example, so as to obtain a uniform layer, to accelerate the release of the applique at the end of the process, and to form a flat reference surface for the dimensional during machining of the underside

Selon une caractéristique particulière de l'invention, on usine la surface inférieure 4 et le pied 5 de l'applique 1 par la face inférieure 12 de l'embase 10. Cet usinage est effectué sur une profondeur P' supérieure à l'épaisseur E de l'embase 10 moins la profondeur P usinée de la face supérieure, soit P' > (E-P).According to a particular characteristic of the invention, the lower surface 4 and the foot 5 of the applique 1 are machined via the lower face 12 of the base 10. This machining is carried out over a depth P 'greater than the thickness E of the base 10 minus the machined depth P of the upper face, ie P '> (EP).

L'usinage de l'applique 1 par la face inférieure de l'embase est effectué à des dimensions légèrement supérieures au pourtour 3 de l'applique 1 de manière à désolidariser l'applique de l'embase, l'applique ainsi formée n'étant plus liée à l'embase 10 et étant alors uniquement maintenue par la couche de colle 14 déposée précédemment.The machining of the bracket 1 from the underside of the base is carried out to dimensions slightly greater than the periphery 3 of the bracket 1 so as to separate the bracket from the base, the bracket thus formed n ' being no longer linked to the base 10 and then only being held by the layer of adhesive 14 previously deposited.

Selon une caractéristique particulière de l'invention, on plonge l'embase dans une solution aqueuse pour dissoudre la colle et libérer l'applique de la couche de colle. Le bain de l'embase 10 dans la solution est réalisé dans un panier pour pouvoir récupérer facilement l'applique libérée.According to a particular characteristic of the invention, the base is immersed in an aqueous solution to dissolve the glue and release the applique from the layer of glue. The base 10 is bathed in the solution in a basket in order to be able to easily recover the released applique.

Dans le cas décrit ici, la solution liquide utilisée est une solution aqueuse alcaline pour dissoudre la colle, l'embase 10 étant plongée dans une succession de bains de lessivage à 55°C pendant 60 min de manière à assurer une bonne dissolution de la colle. Bien évidemment d'autres solutions liquides peuvent être utilisées en fonction de la colle choisie, tout comme le temps de lessivage et la température de la solution aqueuse peuvent varier en fonction de la colle utilisée.In the case described here, the liquid solution used is an alkaline aqueous solution to dissolve the glue, the base 10 being immersed in a succession of leaching baths at 55 ° C for 60 min so as to ensure good dissolution of the glue. . Of course other liquid solutions can be used depending on the glue chosen, any as the wash-out time and the temperature of the aqueous solution may vary depending on the glue used.

Enfin l'applique peut être à nouveau lavée pour enlever d'éventuels résidus de colle, puis séchée. L'applique pourra également recevoir d'autres traitements décoratifs tel que le dépôt d'une matière luminescente.Finally, the applique can be washed again to remove any glue residue, then dried. The wall lamp can also receive other decorative treatments such as the deposition of a luminescent material.

Pour finir, on conditionne l'applique sur une palette de stockage en vue de sa livraison.Finally, the applique is packaged on a storage pallet for delivery.

L'invention concerne également une montre comprenant au moins une applique 1
Bien entendu, la présente invention ne se limite pas à l'exemple illustré et est susceptible de diverses variantes et modifications qui apparaîtront à l'homme de l'art.The invention also relates to a watch comprising at least one applique 1
Of course, the present invention is not limited to the example illustrated and is susceptible of various variants and modifications which will appear to those skilled in the art.

NOMENCLATURENOMENCLATURE

  • 1. Applique,1. Wall lamp,
  • 2. Surface supérieure,2. Upper surface,
  • 3. Pourtour,3. Perimeter,
  • 4. Surface inférieure,4. Bottom surface,
  • 5. Pied5. Foot
  • 10. Embase,10. Base,
  • 11.Face supérieure,11.Top face,
  • 12. Face inférieure,12. Underside,
  • 13. Couche de vernis,13. Coat of varnish,
  • 14. Couche de colle,14. Glue layer,
  • E. Epaisseur embase,E. Base thickness,
  • H. Hauteur applique,H. Wall height,
  • P,P. Profondeur usinages.P, P. Machining depth.

Claims (11)

Procédé de fabrication d'une applique (1), comportant une surface supérieure (2) et le pourtour (3) destinés à être vus par un utilisateur, une surface inférieure (4) pour son appui sur un cadran ou une structure d'une pièce d'horlogerie et au moins un pied (5) saillant de ladite surface inférieure (3), le procédé comprenant les étapes suivantes selon lesquelles : - On réalise une embase (10) en un matériau métallique, ladite embase présentant une face supérieure (11) et une face inférieure (12) ; - On usine la surface supérieure (2) et le pourtour (3) de l'applique (1) dans l'embase depuis la face supérieure, avec une profondeur P prédéfinie ; - On lave l'embase usinée ; - On dépose une couche de vernie sur la face supérieure usinée de l'embase de manière à couvrir la face supérieure, la surface supérieure (2) et le pourtour (3) de l'applique (1) ; - On fait sécher la couche de vernis déposée ; - On dépose, sur au moins toute la profondeur de l'usinage, une couche de colle (14) sur la face supérieure de l'embase (10), ladite couche de colle étant superposée sur la couche de vernis, et on fait sécher la colle ; - on usine la surface inférieure (4) et le pied (5) de l'applique (1) par la face inférieure (12) de l'embase (10) avec une profondeur P' supérieure à l'épaisseur E de l'embase (10) moins la profondeur P usinée de la face supérieure ; - On plonge l'embase dans un bain d'une solution liquide pour dissoudre la couche de colle (14) et libérer l'applique (1) ; - On conditionne l'applique en vue de sa livraison. A method of manufacturing an applique (1), comprising an upper surface (2) and the periphery (3) intended to be seen by a user, a lower surface (4) for its support on a dial or a structure of a timepiece and at least one foot (5) projecting from said lower surface (3), the method comprising the following steps according to which: - A base (10) is made of a metallic material, said base having an upper face (11) and a lower face (12); - The upper surface (2) and the periphery (3) of the wall light (1) are machined in the base from the upper face, with a predefined depth P; - The machined base is washed; - A layer of varnish is deposited on the machined upper face of the base so as to cover the upper face, the upper surface (2) and the periphery (3) of the wall lamp (1); - The deposited layer of varnish is dried; - Is deposited, over at least the entire depth of the machining, a layer of glue (14) on the upper face of the base (10), said layer of glue being superimposed on the layer of varnish, and dried glue ; - the lower surface (4) and the foot (5) of the wall light (1) are machined from the lower face (12) of the base (10) with a depth P 'greater than the thickness E of the base (10) minus the machined depth P of the upper face; - The base is immersed in a bath of a liquid solution to dissolve the adhesive layer (14) and release the applique (1); - The wall lamp is packaged for delivery. Procédé de fabrication selon la revendication 1, comprenant en outre les étapes suivantes : - Effectuer un ébavurage de la surface supérieure (2) et du pourtour (3) de l'applique (1) usinée dans l'embase (10) ; - Effectuer un lessivage électrolytique de l'embase (10). The manufacturing method according to claim 1, further comprising the following steps: - Deburr the upper surface (2) and the periphery (3) of the bracket (1) machined in the base (10); - Carry out an electrolytic washing of the base (10). Procédé de fabrication selon la revendication 1, dans lequel la couche de vernis (13) présente une épaisseur comprise entre 20 µm et 100 µm.Manufacturing process according to Claim 1, in which the varnish layer (13) has a thickness of between 20 µm and 100 µm. Procédé de fabrication selon l'une des revendications 1 à 3, dans lequel la couche de vernis (13) est séchée à 80°C pendant 30 min, puis à 140°C pendant 60 min.Manufacturing process according to one of claims 1 to 3, in which the varnish layer (13) is dried at 80 ° C for 30 min, then at 140 ° C for 60 min. Procédé de fabrication selon l'une des revendications 1 à 4, dans lequel l'embase (10) est formée d'un matériau métallique tel que le laiton l'aluminium ou un métal précieux.Manufacturing process according to one of claims 1 to 4, wherein the base (10) is formed from a metallic material such as brass, aluminum or a precious metal. Procédé de fabrication selon l'une des revendications 1 à 5, dans lequel la couche de colle (14) est séchée en étuve à 45°C pendant cinq heures.Manufacturing process according to one of claims 1 to 5, in which the adhesive layer (14) is dried in an oven at 45 ° C for five hours. Procédé de fabrication selon l'une des revendications 1 à 6, dans lequel le bain de l'embase est effectué dans un panier.Manufacturing process according to one of claims 1 to 6, in which the base is bathed in a basket. Procédé de fabrication selon l'une des revendications 1 à 7, dans lequel on réalise une étape de surfaçage de la couche de colle pour obtenir une épaisseur uniforme.Manufacturing process according to one of Claims 1 to 7, in which a step of surfacing the adhesive layer is carried out in order to obtain a uniform thickness. Procédé de fabrication selon l'une des revendications 1 à 8, dans lequel l'usinage de l'applique par la face inférieure (12) de l'embase (10) est effectué sous ledit au moins un élément d'habillage et à des dimensions légèrement supérieures au pourtour (3) de l'applique (1).Manufacturing process according to one of claims 1 to 8, in which the machining of the applique via the lower face (12) of the base (10) is carried out under said at least one covering element and at dimensions slightly greater than the perimeter (3) of the wall lamp (1). Procédé de fabrication selon la revendication 9, dans lequel au moins un pied (5) est formé pour l'applique (1) en même temps que l'usinage par la face inférieure de l'embase pour former la face inférieure de l'applique (1)The manufacturing method according to claim 9, wherein at least one foot (5) is formed for the applique (1) at the same time as the machining via the underside of the base to form the underside of the wall lamp (1) Montre comportant au moins une applique (1) réalisée par le procédé selon l'une des revendications 1 à 11.Watch comprising at least one applique (1) produced by the method according to one of claims 1 to 11.
EP20175197.1A 2020-05-18 2020-05-18 Method for manufacturing clock components for timepieces Pending EP3913444A1 (en)

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EP20175197.1A EP3913444A1 (en) 2020-05-18 2020-05-18 Method for manufacturing clock components for timepieces
US17/233,691 US20210356912A1 (en) 2020-05-18 2021-04-19 Method for manufacturing timepiece components for timepieces
JP2021072325A JP2021181981A (en) 2020-05-18 2021-04-22 Method for manufacturing component for timekeeper
KR1020210063704A KR102667030B1 (en) 2020-05-18 2021-05-17 Method for manufacturing timepiece components for timepieces
CN202110550650.3A CN113687588B (en) 2020-05-18 2021-05-17 Method for manufacturing a timepiece component of a timepiece
JP2023136979A JP2023153383A (en) 2020-05-18 2023-08-25 Method of manufacturing timepiece components

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EP3989010A1 (en) * 2020-10-21 2022-04-27 Rolex Sa Applique for a timepiece dial and manufacturing process of such an applique

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CN113687588A (en) 2021-11-23
US20210356912A1 (en) 2021-11-18

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