EP1672436B1 - Uhrzifferblatt und Herstellungsverfahren dieses Zifferblattes - Google Patents

Uhrzifferblatt und Herstellungsverfahren dieses Zifferblattes Download PDF

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Publication number
EP1672436B1
EP1672436B1 EP04405784A EP04405784A EP1672436B1 EP 1672436 B1 EP1672436 B1 EP 1672436B1 EP 04405784 A EP04405784 A EP 04405784A EP 04405784 A EP04405784 A EP 04405784A EP 1672436 B1 EP1672436 B1 EP 1672436B1
Authority
EP
European Patent Office
Prior art keywords
mother
pearl
morphology
dial
coating
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.)
Active
Application number
EP04405784A
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English (en)
French (fr)
Other versions
EP1672436A1 (de
Inventor
Roland Dubach
Hilario Gomes
Alexandra Prodromides
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.)
Rolex SA
Original Assignee
Rolex 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
Priority to EP04405784A priority Critical patent/EP1672436B1/de
Application filed by Rolex SA filed Critical Rolex SA
Priority to DE602004012585T priority patent/DE602004012585T2/de
Priority to DE04405784T priority patent/DE04405784T1/de
Priority to US11/300,257 priority patent/US7420884B2/en
Priority to CN200510129664.9A priority patent/CN100582966C/zh
Priority to JP2005365397A priority patent/JP5026698B2/ja
Publication of EP1672436A1 publication Critical patent/EP1672436A1/de
Priority to HK06108173A priority patent/HK1088668A1/xx
Application granted granted Critical
Publication of EP1672436B1 publication Critical patent/EP1672436B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G04B19/12—Selection of materials for dials or graduations markings
    • 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 two methods of manufacturing dials for timepieces, whose visible surface comprises a coating of metallic appearance whose surface state has a morphology characteristic of the apparent morphology of the mother-of-pearl.
  • mother-of-pearl used for the dials is available on the market in the form of thin washers or plates that are polished on the side intended to form the obverse of the dial.
  • the translucent nature of mother-of-pearl reveals its stratified structure, which gives it a characteristic, characteristic morphology, even when its surface is polished.
  • a dial which is constituted by a thin base metal plate on which is glued a thin plate of mother-of-pearl.
  • non-electric coating is applied to the back of this mother-of-pearl plate.
  • the hue of the coating or paint layer and the refraction of the mother-of-pearl combine to produce a particular aesthetic effect.
  • the object of the present invention is to allow to renew the appearance of the surface state of the metal surface of the watch dials, thanks to a new use of mother-of-pearl.
  • this invention first of all relates to a method of manufacturing a dial for a timepiece whose visible surface comprises a coating of metallic appearance whose surface state has a morphology characteristic of morphology.
  • It also relates to a method of manufacturing a dial for a timepiece whose visible surface has a coating of metallic appearance whose surface state has a morphology characteristic of the apparent morphology of the mother-of-pearl according to claim 3, both methods having a common inventive concept, one of directly coating the polished and sandblasted mother-of-pearl plate, the other of coating a replica of the polished and sandblasted mother-of-pearl plate.
  • the coating of metallic appearance can be achieved either directly on the mother-of-pearl, or on a replica made using this mother-of-pearl.
  • the morphology of the metallic-looking coating is unique, since each mother-of-pearl plate is different, while in the other case, the same morphology can be reproduced as many times as desired.
  • the attached single figure is a 1000 x magnified scanning electron micrograph, showing the surface state of a nacre wafer having received a metal coating after having been subjected to the preparatory phase of the method which is the subject of the present invention.
  • the dial for a timepiece according to the present invention can be obtained essentially in two ways, or preferably by coating a previously sandblasted mother-of-pearl plate with metal, or by making a replica of a mother-of-pearl plate previously sand-blasted. using a mold obtained by molding the mother of pearl, as will be explained later.
  • This first step consists in subjecting the surface of the mother-of-pearl intended to form the visible surface of the dial to an operation of sanding in an aqueous medium.
  • the sand used is silicon carbide (SiC) with a mean particle size of 27 ⁇ m, varying between 15 and 50 ⁇ m.
  • the aqueous suspension is prepared by mixing 1 liter of SiC with 10 liters of water of the softened urban water network and 400 g of a gel intended to increase the viscosity of the suspension in order to increase the viscosity of the liquid and to maintain the particles of SiC suspended in this liquid.
  • the viscosity of this suspension was measured by placing 100 ml of suspension in a viscosity measuring beaker according to DIN 53 211, provided with a nozzle 4 mm in diameter.
  • the measured flow time is 11 seconds.
  • the suspension is projected against the nacre surface to be treated with a pressure of between 3.10 5 and 5.10 5 Pa, the distance between the projection nozzle of the suspension and the nacre surface to be treated being 10 cm.
  • the mother-of-pearl disks intended to form the dial bottoms are arranged on a working support constituted, in this example, by a turntable.
  • the mother-of-pearl disks of the desired size for the dials of timepieces are distributed on a circle 370 mm in diameter concentric with the axis of rotation of this plate which is driven at the rate of a revolution of the plate in three minutes.
  • This sanding operation is followed by a cleaning operation for three minutes in hard water, one minute in fresh water followed by a cleaning with an alkaline lye of pH 11.
  • the mother-of-pearl used may be white, pearly white or pink mother-of-pearl: PETERIA MARGARITIFERA or MELEAGRINA MARGARITIFERA from Australia and Japan. It can be pink: POTAMILUS PURPURATA from the USA, finally, it can be black: PINCTADA MARGARATIFERA from Polynesia.
  • these substrates can preferably be coated with a layer of pure gold (Au) yellow, platinum (Pt) gray or a gold-copper alloy. (Au-Cu) pink.
  • Au pure gold
  • Pt platinum
  • Au-Cu gold-copper alloy
  • the mother-of-pearl platelets obtained after sanding and cleaning operations are placed on a working support placed in front of a target in a vacuum coating chamber, with the sandblasted faces of the platelets turned towards the target.
  • the surfaces to be coated with wafers intended to form the visible surfaces of the watch dials are first etched. During this stripping operation, the target is separated from the work support carrying the mother-of-pearl wafers by a target mask. This pickling is performed after evacuation of the chamber (8.10 -4 Pa), argon injection (4 Pa) and plasma formation for 10 minutes, the working power used for the plasma being 10 W.
  • the target is then stripped under the same conditions, the working power used for the plasma then being 50 W.
  • the argon pressure is then adjusted to the working pressure (7.10 -1 Pa) and the support of the substrates to be coated is radiofrequency (RF) biased while simultaneously removing the target mask and the radiofrequency deposition is carried out ( RF) for the cathode of the target for 30 minutes.
  • RF radiofrequency
  • the working powers during the deposition operation vary according to the targets (Au, Pt, AuCu) from 30 to 350 W for the targets and from 5 to 150 W for the substrates.
  • the parts are cooled by a circuit of water at ambient temperature, circulating in the support of the parts to be coated, during the entire duration of the deposit.
  • the distance between the target and the substrates is between 4 and 15 cm.
  • the polarization and the plasma are then stopped and the enclosure is cooled by an argon flow.
  • the thickness of the deposited layer may typically vary from 100 nm to 1000 nm (ie 0.1 ⁇ m to 1 ⁇ m). This thickness is chosen to keep as faithfully as possible the morphology of the mother-of-pearl, as revealed by the sanding operation.
  • the result obtained can be seen in the attached figure which refers to a sanded mother-of-pearl substrate coated with a 500 nm pure gold layer.
  • the nacre could be used to make replicas and these replicas would be coated.
  • the disadvantage of this variant is that the resulting product then becomes perfectly standard and that the exclusive character that is obtained in the case where the coated substrate is mother-of-pearl is lost. and which, given the unique surface morphology it achieves, gives this dial the character of a luxury product.
  • the main advantage of the mother of pearl substrate lies in the fact that it allows to obtain, by an industrial process, a dial of metallic appearance whose surface morphology will never be identical from one dial to another, which, obviously, is not the case if one used the alternative method of mother-of-pearl replicas, since one can not make a different mold per dial, each mold being intended to produce an almost unlimited number.
  • replicas Other known techniques for forming replicas would be useful.
  • This mold would be made a replica by injecting or pressing ceramic, such as alumina powder. Let the ceramics dry, unmold, burn the binders contained in the ceramic and sinter.

Claims (4)

  1. Verfahren zur Herstellung eines Uhrzifferblatts, dessen sichtbare Oberfläche eine Beschichtung von metallischem Aussehen umfasst, deren Oberflächenzustand eine Morphologie aufweist, die für die äussere Morphologie von Perlmutt kennzeichnend ist, dadurch gekennzeichnet, dass eine Platte aus Perlmutt einer Sandungsperation unterworfen wird, um ihr einen Oberflächenzustand zu verleihen, der der äusseren Morphologie dieses Perlmutts entspricht, diese Oberfläche gereinigt und mit einer Schicht aus Metall oder einem Metalloxid, -nitrid oder -carbid überzogen wird.
  2. Verfahren nach Anspruch 1, demzufolge die gesandete Perlmuttplatte durch Aufdampfen (PVD) mit Magnetron-Sputtern eines Targets aus zumindest einem Beschichtungselement beschichtet wird.
  3. Verfahren zur Herstellung eines Uhrzifferblatts, dessen sichtbare Oberfläche eine Beschichtung von metallischem Aussehen umfasst, deren Oberflächenzustand eine Morphologie aufweist, die für die äussere Morphologie von Perlmutt kennzeichnend ist, dadurch gekennzeichnet, dass eine Platte aus Perlmutt einer Sandungsoperation unterworfen wird, um ihr einen Oberflächenzustand zu verleihen, der dessen äusserer Morphologie entspricht, diese Oberfläche gereinigt, ein Abdruck dieser Oberfläche abgenommen, eine Replik der Perlmuttplatte gebildet und diese Replik mit einer Schicht aus Metall oder einem Metalloxid, - nitrid oder -carbid überzogen wird.
  4. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Sandungsoperation eine Sandungsoperation in wässrigem Medium ist.
EP04405784A 2004-12-20 2004-12-20 Uhrzifferblatt und Herstellungsverfahren dieses Zifferblattes Active EP1672436B1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE602004012585T DE602004012585T2 (de) 2004-12-20 2004-12-20 Uhrzifferblatt und Herstellungsverfahren dieses Zifferblattes
DE04405784T DE04405784T1 (de) 2004-12-20 2004-12-20 Uhrzifferblatt und Herstellungsverfahren dieses Zifferblattes
EP04405784A EP1672436B1 (de) 2004-12-20 2004-12-20 Uhrzifferblatt und Herstellungsverfahren dieses Zifferblattes
CN200510129664.9A CN100582966C (zh) 2004-12-20 2005-12-14 钟表表盘和用于制造这种表盘的工艺
US11/300,257 US7420884B2 (en) 2004-12-20 2005-12-14 Timepiece dial and processes for manufacturing this dial
JP2005365397A JP5026698B2 (ja) 2004-12-20 2005-12-19 時計部品の文字盤及びこの文字盤の製造方法
HK06108173A HK1088668A1 (en) 2004-12-20 2006-07-21 Watch dial and manufacturing methods for such a dial

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04405784A EP1672436B1 (de) 2004-12-20 2004-12-20 Uhrzifferblatt und Herstellungsverfahren dieses Zifferblattes

Publications (2)

Publication Number Publication Date
EP1672436A1 EP1672436A1 (de) 2006-06-21
EP1672436B1 true EP1672436B1 (de) 2008-03-19

Family

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Family Applications (1)

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EP04405784A Active EP1672436B1 (de) 2004-12-20 2004-12-20 Uhrzifferblatt und Herstellungsverfahren dieses Zifferblattes

Country Status (6)

Country Link
US (1) US7420884B2 (de)
EP (1) EP1672436B1 (de)
JP (1) JP5026698B2 (de)
CN (1) CN100582966C (de)
DE (2) DE602004012585T2 (de)
HK (1) HK1088668A1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2365404A1 (de) * 2010-03-12 2011-09-14 The Swatch Group Research and Development Ltd. Zumindest teilweise reliefartig emailliertes Ziffernblatt
CN102334784A (zh) * 2010-07-27 2012-02-01 张康 一种高光泽高透明度的珍珠制备方法
CH707940B1 (fr) * 2013-04-23 2017-12-29 Les Ateliers Horlogers Dior Sa Pièce en nacre monobloc imitant la marqueterie et procédé de fabrication d'une telle pièce.
EP2874024A1 (de) * 2013-11-15 2015-05-20 The Swatch Group Research and Development Ltd. Perlmuttzifferblatt für versteckte Anzeigevorrichtung
CN104980367B (zh) 2014-04-03 2019-04-30 深圳市中兴微电子技术有限公司 一种令牌桶限速方法和装置
JP1577216S (de) * 2015-12-07 2017-05-22
EP3339983B1 (de) * 2016-12-23 2020-07-01 The Swatch Group Research and Development Ltd Perlmuttsubstrat, das mit einer gelben schicht beschichtet ist
EP3521945B1 (de) * 2018-02-05 2021-04-07 Montres Rado S.A. Zifferblatt für uhrwerk, und sein herstellungsverfahren
EP3671365A1 (de) * 2018-12-19 2020-06-24 The Swatch Group Research and Development Ltd Zifferblatt einer uhr
JP7232685B2 (ja) * 2019-03-26 2023-03-03 セイコーインスツル株式会社 時計用文字板及び時計
CN114167526A (zh) * 2020-09-11 2022-03-11 Oppo广东移动通信有限公司 摄像头镜片、制备方法以及具有其的电子设备

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
JPS4864961A (de) * 1971-12-08 1973-09-07
JPS491270A (de) * 1972-04-17 1974-01-08
FR2162349B1 (de) * 1971-12-08 1975-03-07 Orient Watch Co Ltd
JPH0639155B2 (ja) * 1986-02-21 1994-05-25 名幸電子工業株式会社 銅張積層板の製造方法
JPH08252106A (ja) * 1995-03-16 1996-10-01 Iba Kogyo Kk 貝殻製品およびその製造方法
JP2000098059A (ja) * 1998-09-21 2000-04-07 Seiko Epson Corp 時計用文字板及びその製造方法
JP2001311783A (ja) * 1999-06-21 2001-11-09 Tefuko Aomori Kk 模様付プラスチック製時計用文字盤の製造方法および該製法により得られうる文字盤
JP3584908B2 (ja) * 2000-10-18 2004-11-04 セイコーエプソン株式会社 装飾板、および、その製造方法、ならびに、この装飾板を利用する装飾品および時計
JP2002148359A (ja) * 2000-11-08 2002-05-22 Citizen Watch Co Ltd 時計用表示装置及びその製造方法
JP2003268568A (ja) * 2002-01-09 2003-09-25 Citizen Watch Co Ltd 白色被膜を有する装飾品およびその製造方法
FR2857030B1 (fr) * 2003-07-01 2006-10-27 Saint Gobain Procede de depot d'oxyde de titane par source plasma

Also Published As

Publication number Publication date
HK1088668A1 (en) 2006-11-10
US20060133219A1 (en) 2006-06-22
DE602004012585T2 (de) 2009-04-16
CN100582966C (zh) 2010-01-20
CN1794113A (zh) 2006-06-28
US7420884B2 (en) 2008-09-02
EP1672436A1 (de) 2006-06-21
JP5026698B2 (ja) 2012-09-12
JP2006177957A (ja) 2006-07-06
DE04405784T1 (de) 2007-01-04
DE602004012585D1 (de) 2008-04-30

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