EP2592499A1 - Schwungmasse - Google Patents

Schwungmasse Download PDF

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Publication number
EP2592499A1
EP2592499A1 EP12190400.7A EP12190400A EP2592499A1 EP 2592499 A1 EP2592499 A1 EP 2592499A1 EP 12190400 A EP12190400 A EP 12190400A EP 2592499 A1 EP2592499 A1 EP 2592499A1
Authority
EP
European Patent Office
Prior art keywords
oscillating mass
heavy metal
mass according
base
lugs
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
Application number
EP12190400.7A
Other languages
English (en)
French (fr)
Other versions
EP2592499B1 (de
Inventor
Laurent Kaelin
Xavier Tinguely
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.)
ETA SA Manufacture Horlogere Suisse
Original Assignee
ETA SA Manufacture Horlogere Suisse
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 ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP12190400.7A priority Critical patent/EP2592499B1/de
Publication of EP2592499A1 publication Critical patent/EP2592499A1/de
Application granted granted Critical
Publication of EP2592499B1 publication Critical patent/EP2592499B1/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
    • G04B5/00—Automatic winding up
    • G04B5/02—Automatic winding up by self-winding caused by the movement of the watch
    • G04B5/16—Construction of the weights
    • G04B5/165—Weights consisting of several parts

Definitions

  • the present invention relates to the oscillating masses for an automatic winding watch.
  • the present invention relates more particularly to such oscillating masses made of plastic or resin.
  • Watch parts made of plastic or synthetic resin are known. These parts can be made by molding processes, which has the advantage of allowing to obtain various shapes sometimes very complicated without any recovery operation. These pieces also have the characteristic of having a density close to 1 and therefore of being light; which is most often an advantage.
  • the characteristic of lightness that the pieces made of plastic can also constitute a serious defect. This is particularly the case when the plastic part is intended to serve as an oscillating weight in an automatic winding. Indeed, in an automatic winding, the winding torque is proportional to the unbalance of the oscillating weight.
  • the patent document US 3,942,317 proposes to make by molding parts having a density greater than 7. These parts are made from a mass of plastic material in which a large amount of particles of a heavy metal have been dispersed.
  • the proposed method is intended in particular to the realization of oscillating masses for winding of automatic watches.
  • a disadvantage of the parts made by this method is that they are brittle. Indeed, tests performed by the Applicant have shown that the oscillating weight has a tendency to break in case of shock on the watch.
  • One possible solution for improving the impact resistance of the oscillating masses produced by the above method is to also add fibers (glass or carbon fibers, for example) to the mass of plastics material loaded with heavy metal particles. .
  • the presence of fibers has the effect, at the same time, to increase the stiffness and improve the impact resistance of plastic parts injected.
  • a disadvantage of this solution is that the simultaneous addition of fibers and heavy metal particles has the effect of significantly increasing the viscosity of the plastic material to be injected. From a certain concentration of fibers and metal particles, the viscosity of the mixture becomes so high that the injection operation of the preparation in a mold can not proceed normally. Thus, it will be understood that practical reasons limit the maximum density, and therefore the unbalance, oscillating masses made of plastic loaded with heavy metal particles.
  • An object of the present invention is to overcome the aforementioned drawbacks by providing a plastic oscillating mass having a density, and more particularly an unbalance, higher than that of known plastic oscillating masses.
  • the present invention achieves this goal by providing an oscillating weight for automatic watch winding according to the appended claim 1.
  • composite material generally refers to a material consisting of a plastic matrix and a reinforcement (preferably in the form of fibers) which provides the mechanical strength.
  • the composite material is first injected into a mold in the liquid state to form the base piece.
  • the peripheral part, at least, of the base part is made of a composite material previously loaded with heavy metal particles; preferably tungsten particles.
  • the heavy metal elements of the invention are then crimped in housings that has the peripheral portion of the base piece.
  • the base piece of the oscillating mass according to the invention is made of composite material loaded with heavy metal particles.
  • the base piece can be made from a composite material without heavy metal particles. The realization of such uncharged variants is not described in detail here, since the skilled person is able to achieve without difficulty such base parts according to the present invention.
  • a homogeneous mixture is prepared containing the plastic material, the heavy metal particles, and the reinforcement in the form of fibers; this mixture being in the liquid state.
  • tungsten can be obtained in the form of granules of polyamide 12 (density 1.02) loaded with tungsten powder (density 19.2). These granules are marketed in particular under the trademark Gravi-Tech ® GRV-NJ-110-W by the company PolyOne Corporation. The mixture from which the granules are made has a density of 11.0 and is suitable for injection molding.
  • fibers mixed with polyamide 12 are marketed, for example, the EMS-GRIVORY company under the name Grilamid ® TRVX Natur-50X9. It is also pellets. They consist of approximately 50% (by volume) of glass fibers; the rest being polyamide 12.
  • the mixture according to the invention can be prepared by mixing granules of Grilamid TR ® and Gravi-Tech ® so that the Grilamid preferably constitutes between 2.5% and 5% of the total weight of the product. mixed.
  • This mixture of granules is used to feed the molding reservoir of an installation which may be of the usual type. It will be understood that Grilamid TR ® and Gravi-Tech ® granules have very different densities. Grilamid TR ® granules therefore tend to concentrate in the upper part of the mixture. It is therefore important to ensure that the mixture is homogeneous, so as to ensure good reproducibility of the molded parts.
  • the injection molding of the heavy metal and fiber-filled plastic material allows relatively complicated basic parts to be made in a single shaping operation without the need for rework or finishing operations.
  • injection molding makes it possible to produce the base part of the oscillating mass represented in the figures.
  • This oscillating mass therefore comprises a base part 1 comprising a serge 3 extending over a circular arc of approximately 180 °, and a plate sector 5 connecting the serge 3 to the axis of rotation of the oscillating mass.
  • the serge 3 constitutes the peripheral portion of the base piece, and that the plate sector 5 constitutes the inner part of this piece.
  • the peripheral portion 3 comprises housings 7 in which are crimped pellets 9 of heavy metal.
  • the housings are all placed on the movement side of the oscillating mass, and that the bottom side of the oscillating mass (cf. figure 1b ) has a perfectly smooth surface. This arrangement confers a particularly sober aesthetic to a movement equipped with this oscillating mass.
  • the heavy metal pellets 9 are forced into the cylindrical housings 7 of the base part 1 once it is demolded and cooled.
  • the oscillating weight with the greatest unbalance is obtained by inserting a heavy metal pellet 9 in each of the six housings 7 formed in the peripheral portion. An oscillating mass with a smaller imbalance can be obtained for example by leaving an empty housing 7 at each end. Such an arrangement leads to a total of four heavy metal pellets 9 instead of six.
  • the housings 7 are partially closed by small lugs 11 integral with the peripheral portion 3 of the base piece.
  • the lugs 11 are arranged to resiliently lock the housing once the heavy metal pellets 9 has been inserted by force.
  • each wafer 9 is elastically held by three lugs regularly distributed over the circumference of the housing 7.
  • the number of lugs per housing can be any.
  • a housing 7 could have four lugs spaced 90 °, or two lugs spaced 180 °, or even a single lug.
  • the lugs 11 have at their base an indentation 13 provided to make the lug more flexible.
  • the size of the pin and the presence or absence of indentation at its base depends essentially on the elasticity and flexibility of the composite material used to make the peripheral portion 3 of the piece basic 1.
  • the heavy metal elements could just as well be glued to the bottom of the housing, or kept each in its own. housing by means of a filling acting as a plug to close the housing.
  • the housing 7 could be closed on the heavy metal pellets 9 by means of a single piece of tape.
  • the elements or pellets of heavy metal 9 could be produced by pressing metal powder and by sintering (no mechanical retouching if not a setting in thickness). It is known that the density of pellets obtained by powder pressing and sintering can be very large. In addition, this variant makes it possible to reuse certain powder waste. It is therefore particularly economical.
  • the basic piece may be shaped like a complete disk rather than a disk sector.
  • the serge of the base piece thus extends over 360 °.
  • the heavy metal elements are found only on a limited sector of the serge, so as to give the oscillating mass its imbalance.
  • the peripheral portion 3 and the inner portion 5 of the base part 1 from two different plastics. For example, it is possible to inject the plastic material loaded with tungsten to form the heavy peripheral segment during a first operation. Then, we can inject plastic material loaded only fibers during a second operation to form the inner part of the base part.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
EP12190400.7A 2011-11-08 2012-10-29 Schwungmasse Active EP2592499B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12190400.7A EP2592499B1 (de) 2011-11-08 2012-10-29 Schwungmasse

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11188261.9A EP2592498A1 (de) 2011-11-08 2011-11-08 Schwungmasse
EP12190400.7A EP2592499B1 (de) 2011-11-08 2012-10-29 Schwungmasse

Publications (2)

Publication Number Publication Date
EP2592499A1 true EP2592499A1 (de) 2013-05-15
EP2592499B1 EP2592499B1 (de) 2020-07-15

Family

ID=47049096

Family Applications (2)

Application Number Title Priority Date Filing Date
EP11188261.9A Withdrawn EP2592498A1 (de) 2011-11-08 2011-11-08 Schwungmasse
EP12190400.7A Active EP2592499B1 (de) 2011-11-08 2012-10-29 Schwungmasse

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP11188261.9A Withdrawn EP2592498A1 (de) 2011-11-08 2011-11-08 Schwungmasse

Country Status (6)

Country Link
US (1) US8882340B2 (de)
EP (2) EP2592498A1 (de)
JP (1) JP6054143B2 (de)
CN (1) CN103092050B (de)
HK (1) HK1185156A1 (de)
RU (1) RU2618442C2 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2551731A1 (de) * 2011-07-28 2013-01-30 Cartier Création Studio S.A. Schwungmasse, die auf die Außenseite eines Uhrwerks geschwenkt ist, und mit einer solchen Schwungmasse ausgestattetes Uhrwerk
CH706000B1 (fr) * 2012-01-13 2023-09-15 Christian Dior Couture Sa Masse de remontage.
JP6144365B2 (ja) 2013-03-28 2017-06-07 ウーテーアー・エス・アー・マニファクチュール・オロロジェール・スイス 複合材料で作られた振動重量体を作る方法
CN105103058B (zh) * 2013-04-10 2018-04-10 斯沃奇集团研究和开发有限公司 用于具有自动上条机构的表的上条装置
USD772095S1 (en) * 2014-07-16 2016-11-22 Richemont International Sa Oscillating weight
JP1605098S (de) * 2016-11-29 2018-05-28
TWD189453S (zh) * 2017-01-19 2018-04-01 哈利溫士頓公司 擺錘
TWD191158S (zh) * 2017-03-02 2018-06-21 哈利溫士頓公司 擺錘
USD853879S1 (en) * 2017-09-15 2019-07-16 Patek Philippe Sa Geneve Corrector for timepieces
EP3674816B1 (de) * 2018-12-24 2022-04-27 The Swatch Group Research and Development Ltd Ausstattung einer uhr oder eines schmuckstücks aus einem schweren verbundmaterial
CH719106A1 (fr) * 2021-11-02 2023-05-15 Officine Panerai Ag Composant horloger ou joaillier monolithique multi-métallique réalisé par frittage.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH249417A (fr) * 1945-03-20 1947-06-30 Bondy S A Montre à remontage automatique par masse oscillante.
CH288208A (de) * 1951-01-23 1953-01-15 Berthoud Robert Schwungkörper, insbesondere für selbstaufziehende Armband-Uhrwerke.
US3942317A (en) 1974-12-03 1976-03-09 Ebauches Bettlach S.A. Component parts for watch movements
EP1445668A1 (de) * 2003-02-04 2004-08-11 Vaucher Manufacture Fleurier SA Schwungmasse
CH695394A5 (fr) * 2002-03-15 2006-04-28 Zenith Internat S A Masse oscillante pour mouvement horloger automatique.
WO2008135817A2 (fr) * 2007-05-08 2008-11-13 Patek, Philippe Sa Composant horloger et son procédé de fabrication
CH700711B1 (fr) * 2007-02-28 2010-10-15 Richemont Int Sa Masse oscillante pour pièce d'horlogerie à remontage automatique.
CH703577A2 (fr) * 2011-03-23 2012-01-13 Christian Dior Couture Sa Masse oscillante pour montre automatique et montre automatique comportant une telle masse.

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH317534A (fr) * 1954-05-06 1956-11-30 Bueren Watch Company S A Masse pour montre à remontage automatique
CH334713A (fr) * 1956-12-10 1958-12-15 Piquerez Sa Ervin Pièce d'horlogerie à remontage automatique
CH371993A (fr) * 1961-09-06 1963-09-15 Rolex Montres Masse de remontage oscillante pour pièce d'horlogerie
CH1341368A4 (de) * 1968-09-06 1970-08-31
CH552843A (de) * 1971-07-22 1974-08-15
JPS49126062U (de) * 1973-02-23 1974-10-29
JPS5155656U (de) * 1974-10-26 1976-04-30
JPS5156263A (ja) * 1974-11-11 1976-05-17 Citizen Watch Co Ltd Jidomakiomori
CH703075A4 (de) * 1975-05-30 1977-01-31
JPS6010589B2 (ja) * 1978-05-10 1985-03-18 シチズン時計株式会社 時計部品
JPS5964587U (ja) * 1982-10-20 1984-04-28 セイコーエプソン株式会社 腕時計見切装飾部材
JPS607091U (ja) * 1983-06-28 1985-01-18 セイコーインスツルメンツ株式会社 腕時計用金属メツキプラスチツクケ−ス
IT1247804B (it) * 1991-01-16 1995-01-02 Aldo Arata Struttura di castone per il fissaggio di pietre preziose e simili, su gioielli in genere
EP0957414B1 (de) * 1998-05-07 2003-02-12 Janvier S.A. Schwungmasse für Uhren mit selbstaufziehendem Uhrwerk und damit ausgestattete Uhr
GB0324439D0 (en) * 2003-10-20 2003-11-19 Levingston Gideon R Minimal thermal variation and temperature compensating non-magnetic balance wheels and methods of production of these and their associated balance springs
EP1918789B1 (de) * 2006-10-31 2008-12-24 The Swatch Group Management Services AG Schwingmasse zum Wiederaufladen der Energiequelle eines tragbaren Instruments
US20090229307A1 (en) * 2008-03-11 2009-09-17 Wing Cheuk Kwan Method of decorating an article
EP2482142B1 (de) * 2011-01-27 2013-08-28 ETA SA Manufacture Horlogère Suisse Schwungmasse

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH249417A (fr) * 1945-03-20 1947-06-30 Bondy S A Montre à remontage automatique par masse oscillante.
CH288208A (de) * 1951-01-23 1953-01-15 Berthoud Robert Schwungkörper, insbesondere für selbstaufziehende Armband-Uhrwerke.
US3942317A (en) 1974-12-03 1976-03-09 Ebauches Bettlach S.A. Component parts for watch movements
CH695394A5 (fr) * 2002-03-15 2006-04-28 Zenith Internat S A Masse oscillante pour mouvement horloger automatique.
EP1445668A1 (de) * 2003-02-04 2004-08-11 Vaucher Manufacture Fleurier SA Schwungmasse
CH700711B1 (fr) * 2007-02-28 2010-10-15 Richemont Int Sa Masse oscillante pour pièce d'horlogerie à remontage automatique.
WO2008135817A2 (fr) * 2007-05-08 2008-11-13 Patek, Philippe Sa Composant horloger et son procédé de fabrication
CH703577A2 (fr) * 2011-03-23 2012-01-13 Christian Dior Couture Sa Masse oscillante pour montre automatique et montre automatique comportant une telle masse.

Also Published As

Publication number Publication date
JP2013101117A (ja) 2013-05-23
HK1185156A1 (zh) 2014-02-07
CN103092050B (zh) 2015-11-25
US8882340B2 (en) 2014-11-11
EP2592498A1 (de) 2013-05-15
EP2592499B1 (de) 2020-07-15
US20130114381A1 (en) 2013-05-09
RU2618442C2 (ru) 2017-05-03
CN103092050A (zh) 2013-05-08
JP6054143B2 (ja) 2016-12-27
RU2012147490A (ru) 2014-05-20

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