CH403654A - Method of manufacturing a watch dial with raised signs and watch dial obtained by this process - Google Patents

Method of manufacturing a watch dial with raised signs and watch dial obtained by this process

Info

Publication number
CH403654A
CH403654A CH1172462A CH1172462A CH403654A CH 403654 A CH403654 A CH 403654A CH 1172462 A CH1172462 A CH 1172462A CH 1172462 A CH1172462 A CH 1172462A CH 403654 A CH403654 A CH 403654A
Authority
CH
Switzerland
Prior art keywords
signs
mold
base
dial
dial plate
Prior art date
Application number
CH1172462A
Other languages
French (fr)
Inventor
Epitaux Rene
Original Assignee
Huguenin & Cie
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 Huguenin & Cie filed Critical Huguenin & Cie
Priority to CH1172462A priority Critical patent/CH403654A/en
Publication of CH403654A publication Critical patent/CH403654A/en

Links

Classifications

    • 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
    • G04B19/103Ornamental shape of the graduations or the surface of the dial; Attachment of the graduations to the dial attached or inlaid numbers
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Description

  

   <Desc/Clms Page number 1> 
 Procédé de fabrication d'un cadran d'horlogerie à signes en relief et cadran d'horlogerie obtenu par ce procédé Différents procédés permettent de    fabriquer   des cadrans d'horlogerie à signes en relief. On connaît la méthode artisanale par laquelle les appliques de métal noble sont rivées une à une sur la plaque de cadran.    On      connait   d'autres procédés prévoyant le collage des signes sur la plaque de cadran. De nouveaux procédés,    apparus   récemment, préconisent la soudure électrique, par ultrasons ou électronique des    signes   sur une plaque de cadran terminée, le    facettage   ou polissage des signes étant réalisé une fois cette soudure exécutée.

   D'autres    procédés   permettent de réaliser des cadrans par voie galvanique, par exemple en déposant dans un moule, porteur d'empreintes, une pellicule métallique, en renforçant cette pellicule au moyen d'une résine et en fixant cet ensemble sur une plaque de base. Enfin, on connaît un procédé suivant lequel on forme des signes par voie    galvanique   dans les ouvertures d'un moule placé sur le cadran. Ce procédé présente l'inconvénient de nécessiter un    facettage   des signes pour leur donner leur aspect final. 



  Pour éviter le    facettage   on a proposé de former les signes dans un moule que l'on applique ensuite sur le cadran de manière à ce que la base des signes soit située en face d'une ouverture que l'on    remplit   de métal qui vient adhérer au signe et le fixer au cadran grâce à la forme conique de l'ouverture. 



  La présente invention a pour objet un procédé de fabrication d'un cadran à signes en relief par voie galvanique, à l'aide duquel les signes sont fixés directement à la surface du cadran. 



  Ce    procédé,   selon lequel on dépose galvaniquement sur la plaque de cadran, à travers les ouvertures d'un    chablon   ou sur les surfaces laissées libres par un vernis protecteur, un socle métallique dont la surface correspond à la section droite des signes en relief, on forme séparément dans un    moule   de matière plastique des empreintes des signes, on métallise ce moule, on remplit ces empreintes par voie galvanique, on dégage du moule la base des empreintes, on superpose le moule à la plaque de cadran, est caractérisé en ce que l'on rend les signes solidaires de leur socle par un dépôt    galvanique   revêtant les surfaces de jonction et que l'on enlève le moule. 



  La présente    invention   a également pour objet un cadran fabriqué selon ledit procédé. 



  Le dessin annexé représente un exemple de mise en    oeuvre   du procédé selon l'invention. 



  Les    fig.   1 à 5 illustrent des    diverses   phases de ce procédé. 



  Une plaque de cadran 1 est, lors de sa terminaison    (fig.   1) munie par dépôt galvanique de socles 2 de faible hauteur dont la surface correspond exactement à la section droite horizontale des signes qui seront par la suite rapportés. Ces socles sont déposés à travers les ouvertures d'un    gabarit   placé sur le cadran ou encore sur les surfaces laissées    libres   par un vernis protecteur tel qu'une solution cellulosique. Un moule de matière plastique, formé d'une base 3 et d'une semelle 4 porte les empreintes 5 des signes terminés    (fig.   2) et il est préalablement    métallisé.   Un dépôt galvanique 6 suffisamment    épais,   permet de remplir les empreintes des signes.

   L'excédent de matière 6 nécessaire à l'homogénéité des signes 5 est ensuite éliminé par    tournage.   La semelle 4 peut alors être dégagée. Les signes restent solidaires de la base du moule, leurs pieds    (fig.   3) débordant du moule. Les faces 7 des signes sont alors légèrement arrondies soit par tournage soit par brossage. Par un    posage   non    représenté   le moule est    centré   en regard de la plaque de cadran 1 munie des socles 2    (fig.   4). L'en- 

 <Desc/Clms Page number 2> 

 semble    ainsi   formé est plongé dans un bain galvanique.

   La circulation du courant entre une anode 8 et l'ensemble plaque de cadran et signe figurant la cathode dépose le métal contenu en dissolution acide dans l'électrolyte dans les interstices    existant   entre les socles et les faces bombées des signes. Le métal ainsi déposé est évidemment le même que celui qui a été utilisé pour former les socles et les signes. Le dépôt doit être interrompu dès que les interstices sont remplis pour éviter l'apparition d'une collerette à la base du signe. Dès cet instant, l'ensemble cadran et moule peut être    sorti   de la cuve galvanique. Le moule est éliminé soit par voie mécanique soit par dissolution chimique. Les signes en relief apparaissent alors terminés, facettés ou décorés comme l'étaient les empreintes du moule au début de la fabrication. 



  Le moule pourrait porter en plus des signes horaires, des signes décoratifs ou des marques de fabrique. On pourrait encore réunir sur un même cadran des signes de diverses couleurs en prenant soin d'utiliser pour chaque couleur un moule particulier. 



  Le procédé de fabrication d'un cadran d'horlogerie permet de réaliser par voie électrolytique et galvanique des cadrans à signes en relief terminés. L'homogénéité et la finesse du grain du métal déposé    élec-      trolytiquement   donnent à ces cadrans, par le poli des surfaces, un aspect extrêmement soigné.



   <Desc / Clms Page number 1>
 Method for manufacturing a watch dial with raised signs and watch dial obtained by this process Different processes make it possible to manufacture watch dials with raised signs. We know the traditional method by which the noble metal appliques are riveted one by one on the dial plate. Other methods are known which provide for the gluing of the signs on the dial plate. New methods, which have recently appeared, advocate the electric, ultrasonic or electronic welding of signs on a finished dial plate, faceting or polishing of the signs being carried out once this welding has been carried out.

   Other methods make it possible to make dials by galvanic means, for example by depositing in a mold, bearing impressions, a metal film, by reinforcing this film by means of a resin and by fixing this assembly on a base plate . Finally, a process is known according to which signs are formed by galvanic means in the openings of a mold placed on the dial. This process has the drawback of requiring faceting of the signs to give them their final appearance.



  To avoid faceting, it has been proposed to form the signs in a mold which is then applied to the dial so that the base of the signs is located in front of an opening which is filled with metal which adheres to it. to the sign and attach it to the dial thanks to the conical shape of the opening.



  The present invention relates to a method of manufacturing a dial with signs in relief by galvanic means, with the aid of which the signs are fixed directly to the surface of the dial.



  This process, according to which is galvanically deposited on the dial plate, through the openings of a template or on the surfaces left free by a protective varnish, a metal base whose surface corresponds to the cross section of the signs in relief, we separately forms imprints of the signs in a plastic mold, this mold is metallized, these imprints are galvanically filled, the base of the imprints is released from the mold, the mold is superimposed on the dial plate, is characterized in that the signs are made integral with their base by a galvanic deposit coating the junction surfaces and the mold is removed.



  Another subject of the present invention is a dial manufactured according to said method.



  The appended drawing represents an example of implementation of the method according to the invention.



  Figs. 1 to 5 illustrate the various phases of this process.



  A dial plate 1 is, when it is terminated (FIG. 1) provided by galvanic deposition with low-height bases 2, the surface of which corresponds exactly to the horizontal cross section of the signs which will be subsequently reported. These bases are placed through the openings of a template placed on the dial or on the surfaces left free by a protective varnish such as a cellulosic solution. A plastic mold, formed of a base 3 and a sole 4 bears the imprints 5 of the finished signs (FIG. 2) and it is previously metallized. A sufficiently thick galvanic deposit 6 makes it possible to fill in the imprints of the signs.

   The excess material 6 necessary for the homogeneity of the signs 5 is then removed by turning. The sole 4 can then be released. The signs remain attached to the base of the mold, their feet (fig. 3) protruding from the mold. The faces 7 of the signs are then slightly rounded either by turning or by brushing. By a fitting, not shown, the mold is centered opposite the dial plate 1 provided with the bases 2 (FIG. 4). The en

 <Desc / Clms Page number 2>

 seems so formed is immersed in a galvanic bath.

   The flow of current between an anode 8 and the dial plate and sign assembly representing the cathode deposits the metal contained in acidic dissolution in the electrolyte in the interstices existing between the bases and the domed faces of the signs. The metal thus deposited is obviously the same as that which was used to form the bases and the signs. The deposit must be stopped as soon as the interstices are filled to avoid the appearance of a collar at the base of the sign. From this moment, the dial and mold assembly can be taken out of the galvanic tank. The mold is removed either mechanically or by chemical dissolution. The raised signs then appear finished, faceted or decorated, as were the impressions of the mold at the start of manufacture.



  In addition, the mold could bear hour signs, decorative signs or trade marks. Signs of various colors could also be brought together on the same dial, taking care to use a particular mold for each color.



  The method of manufacturing a watch dial makes it possible to electrolytically and galvanically produce dials with finished relief signs. The homogeneity and fineness of the grain of the electrolytically deposited metal give these dials, through the polished surfaces, an extremely neat appearance.

 

Claims (1)

REVENDICATION I Procédé de fabrication d'un cadran d'horlogerie à signes en relief, selon lequel on dépose galvanique- ment sur la plaque de cadran, à travers les ouvertures d'un chablon ou sur les surfaces laissées libres par .un vernis protecteur, un socle métallique dont la surface correspond à la section droite des signes en relief, on forme séparément dans un moule de matière plastique des .empreintes des signes, on métallise ce moule, on remplit ces empreintes par voie galvanique, on dégage du moule la base des empreintes, on superpose le moule à la plaque de cadran, caractérisé par le fait que l'on rend les signes solidaires de leur socle par un dépôt galvanique revêtant les surfaces de jonction et que l'on enlève le moule. REVENDICATION II Cadran obtenu par le procédé selon la revendication I. CLAIM I A method of manufacturing a clockwork dial with raised signs, according to which galvanically deposited on the dial plate, through the openings of a template or on the surfaces left free by a protective varnish, a metal base, the surface of which corresponds to the cross section of the raised signs, imprints of the signs are formed separately in a plastic mold, this mold is metallized, these impressions are filled galvanically, the base is released from the mold imprints, the mold is superposed on the dial plate, characterized by the fact that the signs are made integral with their base by a galvanic deposit coating the junction surfaces and that the mold is removed. CLAIM II Dial obtained by the process according to claim I. SOUS-REVENDICATION Procédé selon la revendication I, caractérisé par le fait que l'on arrondit légèrement la base des signes avant de poser le moule sur la plaque de cadran, de manière à ce que, dans le bain galvanique, le métal vienne remplir les interstices entre le socle et la base du signe. Ecrits et images opposés en cours d'examen Exposé d'invention suisse N 344 954 Brevet français N 1280 803 SUB-CLAIM Process according to Claim I, characterized in that the base of the signs is slightly rounded before placing the mold on the dial plate, so that, in the galvanic bath, the metal comes to fill the interstices between the plinth and the base of the sign. Opposite writings and images under examination Swiss invention statement N 344 954 French patent N 1280 803
CH1172462A 1962-10-05 1962-10-05 Method of manufacturing a watch dial with raised signs and watch dial obtained by this process CH403654A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH1172462A CH403654A (en) 1962-10-05 1962-10-05 Method of manufacturing a watch dial with raised signs and watch dial obtained by this process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1172462A CH403654A (en) 1962-10-05 1962-10-05 Method of manufacturing a watch dial with raised signs and watch dial obtained by this process

Publications (1)

Publication Number Publication Date
CH403654A true CH403654A (en) 1965-08-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
CH1172462A CH403654A (en) 1962-10-05 1962-10-05 Method of manufacturing a watch dial with raised signs and watch dial obtained by this process

Country Status (1)

Country Link
CH (1) CH403654A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2549341A1 (en) * 2011-07-20 2013-01-23 The Swatch Group Research and Development Ltd. Method for implanting a decoration in a clock casing element deposited by electroplating and casing element manufactured according to said method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2549341A1 (en) * 2011-07-20 2013-01-23 The Swatch Group Research and Development Ltd. Method for implanting a decoration in a clock casing element deposited by electroplating and casing element manufactured according to said method
WO2013011034A1 (en) * 2011-07-20 2013-01-24 The Swatch Group Research And Development Ltd Method for implanting a decoration in a timepiece trim element deposited by electroplating and trim element produced according to this method
JP2014525039A (en) * 2011-07-20 2014-09-25 ザ・スウォッチ・グループ・リサーチ・アンド・ディベロップメント・リミテッド Method for fitting an ornament into an outer element of a watch deposited by electroforming and outer element produced by this method
US9128468B2 (en) 2011-07-20 2015-09-08 The Swatch Group Research And Development Ltd. Method for inserting a decoration in an external timepiece element deposited by electroforming and an external element made in accordance with this method
RU2597575C2 (en) * 2011-07-20 2016-09-10 Те Свотч Груп Рисерч Энд Дивелопмент Лтд Method of decoration incrustation in watch facing element by electroplating and facing element made using said method

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