• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a watch component (1), in particular a watchband component, a trim component, a caseband, a bottom, a bezel, a platinum or a bridge, made of composite material, the composite material comprising a foam (2) open-cell aluminum alloy (21) and a plastic material (3), the plastic material filling the cells of the foam. The invention also relates to a method of manufacturing such a component.
    公开号:CH713998A1
    申请号:CH00939/17
    申请日:2017-07-18
    公开日:2019-01-31
    发明作者:Buttet Mathias；Recalcati Sébastien
    申请人:Hublot Sa Geneve；
    IPC主号:
    专利说明:

    Description: [0001] The invention relates to a watch component. The invention also relates to a timepiece mechanism comprising such a component. The invention also relates to a timepiece comprising such a component or such a timepiece. Finally, the invention relates to a process for producing or manufacturing such a component, such a mechanism or such a timepiece.
    In the watchmaking field, different materials can be used to make different components of a timepiece, depending on the specifications of this component and the properties of the materials.
    The production of certain watch components in specific materials must be excluded taking into account functional constraints.
    [0004] For the production of a wristwatch, there is a particular need for light components because the watch is worn by the user. Furthermore, there is a particular need for hypoallergenic components because components of the watch are in direct contact with the wearer's skin.
    Furthermore, components must also be resistant to environmental aggressions (ultraviolet rays, sea water, soap, detergents, perspiration ...).
    The object of the invention is to provide a component which makes it possible to remedy the drawbacks mentioned above and to improve the components known from the prior art. In particular, the invention provides a component which is light, hypoallergenic and resistant to environmental aggressions.
    A component according to the invention is defined by claim 1.
    Different embodiments of the component are defined by dependent claims 2 to 8 and 13.
    A method according to the invention is defined by claim 9.
    Different methods of carrying out the process are defined by dependent claims 10 to 12.
    A mechanism according to the invention is defined by claim 14.
    A timepiece according to the invention is defined by claim 15.
    The appended figures represent, by way of example, an embodiment of a method of manufacturing or producing a timepiece according to the invention.
    [0014] FIG. 1 is a schematic view of a first embodiment of a timepiece according to the invention.
    Figs. 2 to 6 are partial sections illustrating different steps of an embodiment of a process for manufacturing a component according to the invention.
    An embodiment of a timepiece 30 is described below with reference to FIG. 1. The timepiece is for example a watch, in particular a wristwatch. The timepiece comprises a bracelet 25 and a case 20, the case 20 containing a watch movement 10. The strap, the case and the movement are grouped under the generic term "mechanism".
    The movement 10 comprises at least one component 1a, in particular a blank such as a plate or a bridge, made of a particular material described below and / or the housing comprises at least one component 1b made of this particular material and / or the bracelet comprises at least one component 1c made of this particular material.
    An embodiment of the timepiece component 1, 1a, 1b, 1c is therefore in particular a watch strap component, a covering component, a middle part, a caseback, a bezel, a plate or a bridge.
    The component is made of composite material.
    The composite material comprises, as shown in FIG. 6:
    a foam 2 of aluminum alloy with open cells 21, and
    a plastic material 3, the plastic material filling the cells with the foam.
    Preferably, the composite material comprises only the foam 2 of aluminum alloy with open cells 21 and the plastic material 3.
    The foam is of the open cell or open cell type. Thus, from any open cell or cell of the foam, it is possible to find a path, out of the solid matter, which makes it possible to join another open cell or cell of the foam.
    The fact that the foam is open cells does not exclude that some cells can be closed. This can happen in particular depending on the foam production process. By "open cell foam" we therefore mean a foam in which a significant proportion of cells, in particular a majority of cells, is of the "open cell" type.
    The aluminum alloy can be of any kind, provided that a foam can be produced therefrom.
    For example, the aluminum alloy includes:
    CH 713 998 A1
    - between 0.7% and 1.3% by mass of silicon; and or
    - between 0.4% and 1% by mass of manganese; and or
    - between 0.6% and 1.2% by mass of magnesium.
    The aluminum alloy also comprises at least 80%, or even at least 90%, by mass of aluminum.
    For example, the aluminum alloy can be the aluminum alloy 6082 (EN AW-6082) (also designated: AISH MgMn or 3.2315 or H30 or A96082 according to other standards).
    The 6082 aluminum alloy comprises (by mass):
    Aluminum: 95.2% to 98.3%;
    Chrome: at most 0.25%;
    Copper: at most 0.1%;
    Iron: at most 0.5%;
    Magnesium: 0.6 to 1.2%;
    Manganese: 0.4% to 1.0%;
    Silicon: 0.7 to 1.3%;
    Titanium: at most 0.1%;
    Zinc: at most 0.2%;
    the rest: at most 0.15%.
    The foam can be produced by any means.
    Preferably, the size of the cells is less than 2 mm. Advantageously, at least 80% of the cells have a size of between 0.05 mm and 2 mm.
    For a given volume of material, the aluminum alloy occupies between 20%, even 10%, and 40%, even 50%, of the volume, typically about 30%. The complement is formed by the alveoli.
    The plastic material completely or almost completely fills the cells of the foam. For example, the plastic material fills at least 80% of the volume of the foam cells. The rest can consist of gas inclusions.
    The plastic material is preferably based on polymer or is a polymer.
    The polymer can be a thermoplastic, in particular a transparent or translucent thermoplastic.
    The polymer is preferably of the acrylic type, in particular polymethyl methacrylate (PMMA). Polymethyl methacrylate has the advantage of easy infiltration into aluminum alloy foam.
    For example, the plastic material can be produced by mixing the product ACRIFIX® 2R 1900 and a product ACRIFIX® CA 0020, the two products being marketed by the company EVONIK.
    The plastic material can include:
    - pigments; and or
    - one or more dyes.
    The pigments can be luminescent or phosphorescent pigments.
    As a result of what has been seen previously, the composite material comprises more than 50% by volume of plastic material and / or the composite material comprises less than 90% by volume of plastic material. Preferably, the composite material preferably comprises about 70% by volume of plastic material.
    An embodiment of a method for manufacturing a timepiece component 1 (corresponding to the references 1a, 1b, 1c used previously) is described below with reference to FIGS. 2 to 6. Figs. 2 to 6 being section type views (therefore in two dimensions), all the links or communications between the cells of the foam are not visible.
    In a first phase, a foam 2 of aluminum alloy with open cells 21 is produced.
    In a second phase, the cells 21 are filled with the plastic material.
    In a first step of the first phase, a mold 5 is provided. The mold is suitable for foundry. It resists for example the melting temperature of the aluminum alloy. Preferably, the mold has a negative shape of the blank of the timepiece component that one wishes to obtain.
    In a second step, the grains of a salt are placed in the mold. The mold is advantageously filled with grains 4 of salt, as shown in FIG. 2. For example, the salt is sodium chloride. This salt is appreciated because it is not harmful. Any other salt can be used. However, the salt must be adapted so as not to melt at the melting temperature of the aluminum alloy. The grains 4 of salt can be more or less compacted, in particular by vibration. The geometric characteristics of the grains (shapes and sizes) as well as the compaction of the grains ultimately determine, for a given volume of composite material, the volume percentage of aluminum alloy in the composite material.
    In a third step, the molten aluminum alloy is poured into the mold. The liquid aluminum alloy fills, in the mold, the interstices formed between the grains 4. We can practice a depression in the mold
    CH 713 998 A1 to favor the filling of the interstices. Likewise, the mold can be vibrated and / or the mold can be manipulated, in particular the mold can be turned over, to promote filling of the interstices.
    In a fourth step, the aluminum alloy is allowed to solidify as shown in FIG. 3. A material made of aluminum alloy with salt inclusions is obtained.
    In a fifth step, the salt inclusions are dissolved. To do this, the material obtained in the previous step is immersed in a solvent for this salt. In the case of sodium chloride, water can be used. To promote and accelerate the dissolution of the salt, the bath can be stirred and / or heated.
    Thus, after dissolution of the salt, a foam 2 of aluminum alloy with open cells 21 as shown in FIG. 4.The cells are in fact formed by the volumes previously occupied by the grains of salts.
    Aluminum foam can of course be obtained alternatively by any other method.
    In a first step of the second phase, a mold is provided 6. The mold is suitable for molding plastics. It can be different from the foundry mold 5. Preferably, the mold has a negative shape from the outline of the timepiece component that it is desired to obtain.
    In a second step, the aluminum foam is placed in the mold.
    In a third step, the plastic material is poured into the liquid phase in the mold. The liquid plastic material fills the open cells in the mold, as shown in FIG. 5. One can practice a depression in the mold to favor the filling of the alveoli. Likewise, the mold can be vibrated and / or the mold can be manipulated, in particular the mold can be turned over, to favor filling of the cells. The liquid plastic material can be prepared by mixing two products, one of these products constituting a hardener.
    In a fourth step, the plastic material is allowed to solidify or harden, in particular polymerize. Depending on the nature of the plastic material, this solidification can be activated or accelerated by heat.
    In a fifth step, the component is removed from the mold and a component or a component blank made of composite material is obtained as shown in FIG. 6.
    In a sixth step, one can still optionally shape the component or apply one or more surface treatments on the component. In particular, the component can be machined and / or the component polished and / or the component sandblasted and / or the component blasted.
    Throughout this document, by "aluminum alloy" means any alloy in which aluminum is predominant or majority in mass. Preferably, the alloy contains at least 80%, or even at least 90%, of aluminum by mass.
    The watch component obtained has many advantages and advantages:
    - It is extremely light: the density of the composite material can be of the order of 1600 kg.m "3, in particular between 1500 kg.m" 3 and 1800 kg.m "3;
    - it has an original appearance: in fact, the component surface is made up of areas made of plastic and areas made of aluminum alloy;
    - its appearance can be radically modified by the addition of dye and / or pigments in the plastic;
    - it has a smooth surface appearance unlike an aluminum alloy foam alone which has pores on the surface;
    - it is hypoallergenic, the aluminum alloy foam alone although hypoallergenic as such having the defect of having pores (alveoli opening at the surface of the component) which become fouled;
    - it is resistant to common environmental aggressions (ultraviolet rays, sea water, soap, detergents, perspiration ...);
    - It has good machinability, especially compared to an aluminum alloy foam not impregnated with plastic material;
    - it is much more mechanically resistant than if it were made of plastic material only.
    权利要求:
    Claims (15)
    [1]
    1. Watch component (1; 1a; 1b; 1c), in particular watch strap component, covering component, middle part, back, bezel, plate or bridge, made of composite material, the composite material comprising a foam (2) of aluminum alloy with open cells (21) and a plastic material (3), the plastic material filling the cells with foam.
    [2]
    2. Watch component according to the preceding claim, characterized in that the aluminum alloy is an aluminum alloy comprising:
    - between 0.7% and 1.3% by mass of silicon; and or
    - between 0.4% and 1% by mass of manganese; and or
    - between 0.6% and 1.2% by mass of magnesium;
    and / or that the aluminum alloy is aluminum alloy 6082.
    CH 713 998 A1
    [3]
    3. Watch component according to one of the preceding claims, characterized in that the plastic material is based on polymer or is a polymer.
    [4]
    4. Watch component according to the preceding claim, characterized in that the polymer is a thermoplastic, in particular a transparent or translucent thermoplastic.
    [5]
    5. Watch component according to claim 3 or 4, characterized in that the polymer is of acrylic type, in particular is polymethyl methacrylate PMMA.
    [6]
    6. Watch component according to one of the preceding claims, characterized in that the plastic material comprises:
    - pigments; and or
    - one or more dyes.
    [7]
    7. timepiece component according to one of the preceding claims, characterized in that the composite material comprises more than 60% by volume of plastic material and / or the composite material comprises less than 80% by volume of plastic material, the composite material comprising preferably about 70% by volume of plastic material.
    [8]
    8. timepiece component according to one of the preceding claims, characterized in that the composite material has a density between 1500 kg.m "3 and 1800 kg.m" 3, in particular of the order of 1600 kg.m " 3.
    [9]
    9. Method for manufacturing a timepiece component (1; 1a; 1b; 1c) according to one of claims 1 to 8, comprising the following steps:
    - provide the foam (2) of aluminum alloy with open cells (21);
    - fill the cells with the plastic material (3) in the liquid phase;
    - harden, in particular polymerize, the plastic material.
    [10]
    10. The manufacturing method according to the preceding claim, comprising an additional step of shaping or processing the timepiece component, this additional step being a machining step and / or a polishing type surface treatment step and / or sandblasting and / or shot blasting type.
    [11]
    11. The manufacturing method according to claims 9 or 10, wherein the step of supplying the foam comprises the following steps:
    - provide a mold (5);
    - fill the mold with grains (4) with a salt, in particular with sodium chloride grains;
    - pour the molten aluminum alloy into the mold;
    - after solidification of the alloy, dissolve the grains of salt.
    [12]
    12. The manufacturing method according to one of claims 9 to 11, in which the step of filling the cells with the plastic material in the liquid phase comprises the following steps:
    - place the aluminum alloy foam in a mold (6);
    - possibly, create an at least partial vacuum in the mold; -to pour the plastic material in liquid phase in the mold.
    [13]
    13. Watch component (1) obtained according to the method of one of claims 9 to 12.
    [14]
    14. Clock mechanism (10, 20, 25), in particular clock movement (10), comprising a component (1, 1a, 1b, 1c) according to one of claims 1 to 8 and 13.
    [15]
    15. Timepiece (30), in particular wristwatch, comprising a mechanism according to the preceding claim or a component according to one of claims 1 to 8 and 13.
    CH 713 998 A1
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    同族专利:
    公开号 | 公开日
    CH713998B1|2021-03-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0268120A1|1986-11-03|1988-05-25|Asulab S.A.|Composite material|
    DE29921776U1|1999-12-10|2000-08-10|Pore M Gmbh|Jewelry, watch, glasses and other decorative parts|
    FR2921281A1|2007-09-26|2009-03-27|C T I F Ct Tech Des Ind De La|Preform made of aggregate elements such as balls and kaolin useful as destructible core for manufacturing an aluminum or aluminum alloy foam with open cells by foundry, where the elements are defined between gaps with a sufficient size|
    WO2015061817A2|2013-10-28|2015-05-07|Erich Neubauer|Material having a multiphase structure|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH00939/17A|CH713998B1|2017-07-18|2017-07-18|Watch component made of composite material and method of manufacturing such a component.|CH00939/17A| CH713998B1|2017-07-18|2017-07-18|Watch component made of composite material and method of manufacturing such a component.|
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