EP1538493A1 - Emailliertes Zifferblatt mit eingeschlagenen Füssen und Herstellungsverfahren dafür - Google Patents
Emailliertes Zifferblatt mit eingeschlagenen Füssen und Herstellungsverfahren dafür Download PDFInfo
- Publication number
- EP1538493A1 EP1538493A1 EP03027696A EP03027696A EP1538493A1 EP 1538493 A1 EP1538493 A1 EP 1538493A1 EP 03027696 A EP03027696 A EP 03027696A EP 03027696 A EP03027696 A EP 03027696A EP 1538493 A1 EP1538493 A1 EP 1538493A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dial
- ceramic
- enamelled
- feet
- thickness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title claims description 9
- 239000000919 ceramic Substances 0.000 claims abstract description 23
- 210000003298 dental enamel Anatomy 0.000 claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 238000004026 adhesive bonding Methods 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 5
- 229910001020 Au alloy Inorganic materials 0.000 claims description 3
- 238000004534 enameling Methods 0.000 claims description 3
- 239000003353 gold alloy Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 239000003292 glue Substances 0.000 abstract description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
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
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B19/00—Indicating the time by visual means
- G04B19/06—Dials
- G04B19/12—Selection of materials for dials or graduations markings
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B19/00—Indicating the time by visual means
- G04B19/06—Dials
- G04B19/14—Fastening the dials to the clock or watch plates
Definitions
- the present invention relates to an enamelled dial with driven feet, in particular an enamelled dial for a timepiece.
- the invention also relates to a method for making such a dial, and to fix the feet with a accuracy requiring no retouching for subsequent positioning in housing provided in the plate.
- the enameling of the visible face of the dial was useful, especially to hide a substrate generally made of copper, or copper alloy for aesthetic purposes.
- the face back of the dial is provided with feet to ensure correct positioning of the dial.
- said rear face of the dial has a counter-enamelling, even coarse, to compensate for the tensions resulting from enamelling of the visible side.
- the traditional manufacturing process involves a very large number of steps requiring from the manufacturer a great know-how which does not prevent not in spite of that to have a significant percentage of rejects, as we will understand it below.
- a first step cutting into a thin copper plate, or copper alloys (0.1 mm for a wristwatch, up to 0.4 mm for a pendulum), a template a little larger than the shape of the dial, holes are drilled for the feet of copper dial, then the riveting / welding of the feet is done.
- no openings, such as needles or wickets, are made in the base plate, on the one hand not to weaken it, on the other hand to avoid the well formation during enameling.
- a enamel composition on both sides of the plate by known methods, such as soaking, screen printing or sieving. In the latter case, the face lower is previously coated with glue.
- the dial thus prepared is then baked at a temperature between 750 ° C and 850 ° C depending on the composition enamel. The bending and the lower enamel layer make it possible to control deformations of the dial, due to the difference between the coefficient of expansion of copper and that of enamel, at the end of manufacture.
- this second step is renewed several times time, ie between 2 to 5 times, until the enamel layer has a thickness about 0.7 mm, the thickness needed to mask the appearance as little as possible aesthetics of the copper substrate and to give the dial the mechanical properties desired.
- a surface condition check is performed to eliminate the unwanted inclusions and to fill the pores, and the dial is again subject to a heat treatment.
- the third step consists of tracing the dial indexes, applying a film varnish or enamel very thin with a passage in the oven, then to make a pressing to a temperature determined to give the dial the optimum flatness.
- the fourth step is to retouch on the back of the dial.
- the "technical" enamel layer is roughly upgraded, but retains a granular and porous appearance.
- the feet which may have been distorted during previous manipulations and heat treatments, are first cleared by image of the enamel film that can cover them, then straightened so that they coincide perfectly with the housing provided in the plate. During this stage, Risks of damaging an almost finished product are great. Indeed, the recovery feet can cause either breakage or cracks in the enamel layer, even its partial detachment.
- the present invention therefore aims at overcoming the drawbacks of this prior art, by providing a method of manufacturing an enamelled dial with hunted feet with fewer steps and does not require repositioning feet at the end of manufacture, nor grinding for the setting of the dial.
- the invention relates to an enamelled dial with feet driven from positioning in the turntable of a watch movement, said dial being formed by a first ceramic element, the outer surface of which is coated with one to two layers of enamel and a second element provided with a housing allowing the setting in place precise one foot by driving and / or gluing before assembly of the two elements by gluing and / or welding.
- This second element oriented movement side can be made ceramic as the first element and have the same dimensions than this one. It can also be made of metal with the same contour than the first element, but with a smaller thickness, or in the form of a block being inserted into a housing formed in the first ceramic element.
- the first ceramic element has a clear hue
- the small number of layers of enamel is enough to have, with a thickness between 0.1 mm and 0.4 mm, a very satisfactory surface condition and conversely allows to have a thicker substrate.
- the thickness of the ceramic substrate is preferably between 0,4 mm, which is a value already allowing to have mechanical properties satisfactory, and 0.7 mm, depending on the embodiment.
- the finished dial has substantially the same thickness as the dials of the prior art, but with a inversion of substrate thickness ratios / enamel layer.
- a dial according to the invention is basically composed of three elements.
- An upper ceramic element 1a having about 0.4 mm thick, is coated with one or two layers of enamel whose total thickness is between 0.1 mm and 0.4 mm. This small number of layers is quite sufficient, given the clear appearance of the ceramic on which the enamel layers are applied.
- the enamelled surface is also applied to decal for hour markers or other signs, then make a glaze.
- a lower element 1b, also ceramic about 0.4 mm thick is provided with a bore 2 intended to receive a cylindrical foot 9 secured by gluing and / or driving before assembling the lower elements 1b and higher 1a by means of an adhesive joint 4 and / or a peripheral weld 6, for example by laser or electronic bombing.
- the two ceramic elements 1a, 1b are obtained from a powder ceramic such as an oxide of aluminum or zirconium, by pressing or by well known CIM (Ceramic Injection Molting) process.
- CIM Chemical Injection Molting
- the control of this process is currently sufficient to produce parts with very close tolerance requiring no further editing, especially since the very small number of layers enamel does not produce edge effects.
- the assembly of the elements 1 a and 1 b is carried out preferably by peripheral welding.
- FIG. 3 corresponds to a second embodiment in which the foot of dial is still set by chase.
- the dial comprises an upper element 1 has in ceramic having a thickness of between 0.4 and 0.7 mm, said element being as previously covered with one to two layers of enamel 3.
- the lower element 8 is formed of a metal plate, for example copper or a gold alloy, of a thickness between 0.1 and 0.3 mm.
- This lower element 8 has holes 2 at the precise locations where the feet 9 must be fixed by driving and / or gluing before assembly of the upper elements 1a and lower 8 by means of an adhesive joint 4.
- This embodiment also makes it possible to have a rear face of the dial very aesthetic by choosing the same metal for the lower element 8 and for the foot 9, by example a gold alloy.
- Fig. 4 shows a third embodiment, which is in fact a variant of the previous embodiment.
- the metal plate constituting the lower element 8 is replaced by a metal block 10 in which the foot 9 is chased / glued, said block 10 being positioned in a housing 13 formed in the upper element 1, either during the manufacture of said element by pressing or by the CIM process, or later by machining.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Insulated Metal Substrates For Printed Circuits (AREA)
- Ceramic Products (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60320805T DE60320805D1 (de) | 2003-12-03 | 2003-12-03 | Emailliertes Zifferblatt mit eingeschlagenen Füssen und Herstellungsverfahren dafür |
EP20030027696 EP1538493B1 (de) | 2003-12-03 | 2003-12-03 | Emailliertes Zifferblatt mit eingeschlagenen Füssen und Herstellungsverfahren dafür |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20030027696 EP1538493B1 (de) | 2003-12-03 | 2003-12-03 | Emailliertes Zifferblatt mit eingeschlagenen Füssen und Herstellungsverfahren dafür |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1538493A1 true EP1538493A1 (de) | 2005-06-08 |
EP1538493B1 EP1538493B1 (de) | 2008-05-07 |
Family
ID=34442940
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20030027696 Expired - Lifetime EP1538493B1 (de) | 2003-12-03 | 2003-12-03 | Emailliertes Zifferblatt mit eingeschlagenen Füssen und Herstellungsverfahren dafür |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1538493B1 (de) |
DE (1) | DE60320805D1 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1940776B (zh) * | 2004-09-22 | 2010-05-05 | 阿苏拉布股份有限公司 | 多层级搪瓷珐琅表盘 |
EP2400354A1 (de) * | 2010-06-22 | 2011-12-28 | The Swatch Group Research and Development Ltd. | Zifferblattfuß einer Uhr |
EP2503414A1 (de) * | 2011-03-23 | 2012-09-26 | Rubattel et Weyermann S.A. | Decorated enamelled part |
CN103576530A (zh) * | 2012-07-19 | 2014-02-12 | 王辉 | 陶瓷表 |
RU2588466C2 (ru) * | 2011-03-23 | 2016-06-27 | Рубаттель Унд Вайерманн С.А. | Декорированная эмалированная деталь |
CN112947029A (zh) * | 2019-12-10 | 2021-06-11 | 柯马杜股份有限公司 | 具有支脚的由非导电材料制成的表盘 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH352962A (de) * | 1957-03-22 | 1961-03-15 | Bloesch Walter | Verfahren zur Herstellung eines Zifferblattes und nach diesem Verfahren hergestelltes Zifferblatt |
US3803832A (en) * | 1972-02-01 | 1974-04-16 | N Shimizu | Dial for wrist watch and a method of making the same |
GB2052113A (en) * | 1979-06-29 | 1981-01-21 | Citizen Watch Co Ltd | A structure for a timepiece and a method of manufacturing the structure |
JPS5881977A (ja) * | 1981-11-09 | 1983-05-17 | Toru Mashida | 装飾基体の製造方法 |
-
2003
- 2003-12-03 DE DE60320805T patent/DE60320805D1/de not_active Expired - Lifetime
- 2003-12-03 EP EP20030027696 patent/EP1538493B1/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH352962A (de) * | 1957-03-22 | 1961-03-15 | Bloesch Walter | Verfahren zur Herstellung eines Zifferblattes und nach diesem Verfahren hergestelltes Zifferblatt |
US3803832A (en) * | 1972-02-01 | 1974-04-16 | N Shimizu | Dial for wrist watch and a method of making the same |
GB2052113A (en) * | 1979-06-29 | 1981-01-21 | Citizen Watch Co Ltd | A structure for a timepiece and a method of manufacturing the structure |
JPS5881977A (ja) * | 1981-11-09 | 1983-05-17 | Toru Mashida | 装飾基体の製造方法 |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 0071, no. 75 (C - 179) 3 March 1983 (1983-03-03) * |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1940776B (zh) * | 2004-09-22 | 2010-05-05 | 阿苏拉布股份有限公司 | 多层级搪瓷珐琅表盘 |
EP2400354A1 (de) * | 2010-06-22 | 2011-12-28 | The Swatch Group Research and Development Ltd. | Zifferblattfuß einer Uhr |
WO2011161080A1 (fr) * | 2010-06-22 | 2011-12-29 | The Swatch Group Research And Development Ltd | Pieds de cadran de piece d'horlogerie |
RU2588466C2 (ru) * | 2011-03-23 | 2016-06-27 | Рубаттель Унд Вайерманн С.А. | Декорированная эмалированная деталь |
EP2503415A1 (de) * | 2011-03-23 | 2012-09-26 | Rubbatel & Weyermann S.A. | Verziertes emailliertes Werkstück |
CN102692861A (zh) * | 2011-03-23 | 2012-09-26 | 鲁***和韦耶曼有限公司 | 装饰的施有珐琅的部件 |
CN102692861B (zh) * | 2011-03-23 | 2015-02-25 | 鲁***和韦耶曼有限公司 | 装饰的施有珐琅的部件 |
US9012016B2 (en) | 2011-03-23 | 2015-04-21 | Rubattel & Weyermann S.A. | Decorated enamelled part |
EP2503414A1 (de) * | 2011-03-23 | 2012-09-26 | Rubattel et Weyermann S.A. | Decorated enamelled part |
CN103576530A (zh) * | 2012-07-19 | 2014-02-12 | 王辉 | 陶瓷表 |
CN112947029A (zh) * | 2019-12-10 | 2021-06-11 | 柯马杜股份有限公司 | 具有支脚的由非导电材料制成的表盘 |
EP3835880A1 (de) | 2019-12-10 | 2021-06-16 | Comadur S.A. | Uhrzifferblatt mit füsschen |
JP2021092551A (ja) * | 2019-12-10 | 2021-06-17 | コマディール・エス アー | 足部を備え非伝導性材料によって作られた表盤 |
CN112947029B (zh) * | 2019-12-10 | 2022-05-24 | 柯马杜股份有限公司 | 具有支脚的由非导电材料制成的表盘 |
US11340556B2 (en) | 2019-12-10 | 2022-05-24 | Comadur Sa | Dial made of non-conductive material with feet |
Also Published As
Publication number | Publication date |
---|---|
EP1538493B1 (de) | 2008-05-07 |
DE60320805D1 (de) | 2008-06-19 |
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