• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
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  • 优先权
    • 专利摘要:
    The invention relates to a method for manufacturing an articulated bracelet strand (100), formed of at least two links (1, 2, 3), comprising the following steps: generating a 3D file of the bracelet strand; converting the 3D file into a plurality of layers by means of software, each layer representing a cross section of the bracelet strand; forming the bracelet strand layer by layer by means of additive manufacturing. According to the invention, the 3D file comprises at least one internal housing in at least one of the links, said housing being arranged to receive and maintain a hinge element (4), so that said at least two links form a hinged assembly.
    公开号:CH713337A2
    申请号:CH01761/16
    申请日:2016-12-30
    公开日:2018-07-13
    发明作者:Ruegsegger Alain
    申请人:Swatch Group Res & Dev Ltd；
    IPC主号:
    专利说明:

    Description
    FIELD OF THE INVENTION [0001] The invention relates to a method for manufacturing a bracelet, and more specifically to a bracelet with links for a timepiece.
    BACKGROUND OF THE INVENTION [0002] Generally, a bracelet comprises a plurality of links which are manufactured one by one and articulated to one another, the two edges of a link being assembled against the edges of respective adjacent links, transverse passages. traversing at least partially the respective adjacent assembled links to form bearings in which hinge members are engaged and held at both ends of the respective transverse passages.
    EP 2 484 247 discloses such a bracelet comprising an assembled link comprising, on either side, at least two such links equipped, and comprising at least one spacer having two ends arranged to cooperate, at the level of two ends, with two of the links fitted. Such a bracelet is long to manufacture and assemble. Such a bracelet also requires the use of a tool to perform the assembly and adjustment of the length. SUMMARY OF THE INVENTION [0004] One of the objectives of the invention is to overcome the various drawbacks of these known techniques.
    More specifically, an object of the invention is to provide a method of manufacturing a link bracelet to achieve the bracelet at one time to the desired length.
    The invention also aims, at least in a particular embodiment, to provide a manufacturing process that drastically reduces the manufacturing time of a bracelet, which is simple to implement and inexpensive .
    These objectives, as well as others which will appear more clearly later, are achieved according to the invention with the aid of a manufacturing of an articulated bracelet strand, formed of at least two links, comprising the following steps: - generate a 3D file of the bracelet strand; converting the 3D file into a plurality of layers by means of software, each layer representing a cross section of the bracelet strand; - forming the bracelet strand layer by layer by means of additive manufacturing.
    According to the invention, the 3D file comprises at least one internal cavity in at least one of the links, the cavity being arranged to receive a hinge element, so that said at least two links form a captive assembly. and indémontable.
    Thus, the object of the present invention, by its different functional and structural aspects described above, to obtain a bracelet easy and quick to manufacture.
    According to other advantageous variants of the invention: - the hinge means comprises a cylindrical rod receiving an excrescence at each of its ends, each protrusion being arranged to rest in said at least one housing; at least one link comprises a cylindrical bearing arranged to receive said rod of said articulation element; said at least one housing comprises a section of diameter D, and said reach a second section of diameter d smaller than the diameter D of the section of said housing; the method comprises a step of washing the formed bracelet strand, the bracelet strand being immersed in a solution; - additive manufacturing is carried out using Multi-Jet Modeling technology.
    The invention also relates to a bracelet strand obtained by the method according to the invention.
    BRIEF DESCRIPTION OF THE DRAWINGS Other characteristics and advantages of the invention will emerge more clearly on reading the following description of a particular embodiment of the invention, given by way of a simple illustrative and nonlimiting example, and appended figures, among which: FIG. 1 is a sagittal sectional view of a plurality of links hinged together to form a braking strand according to the invention; figs. 2a and 2b are respectively longitudinal sectional views of a bracelet strand according to the invention according to a first and a second embodiment;
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0013] A method of manufacturing a link bracelet strand as well as the bracelet strand resulting from such a method will now be described in the following with reference to FIGS. 1,2a and 2b.
    The invention is described here with the simplified and nonlimiting case of two complementary link elements movable relative to each other, and it is naturally possible to make a bracelet strand according to the invention comprising more of link elements movable between them.
    The assembly of a plurality of articulated links to form a bracelet is illustrated in FIGS. 2a and 2b, where each link is articulated to an adjacent link by a hinge element 4. The latter is held at its ends in housings 10, 20 of diameter D formed in the side links 1 and 2. The middle part of the hinge element 4 passes through a substantially cylindrical bearing surface of diameter d formed in the intermediate link (s) 3 adjacent to the lateral links, the bearing surface having a diameter d smaller than the diameter D of the housing to prevent disassembly.
    As illustrated in FIG. 1, the articulation member 4 comprises, in this example, two protrusions 40 in the form of a cylinder with a cross section. These protuberances 40 are arranged at the ends of the hinge element 4. The hinge element 4 is in the form of a rod 41 having a straight cylindrical section, and is housed in the span 30 formed in the or the intermediate links 3. The rod 41 is held between the two side links 1 and 2, in the housings 10 and 20 respectively formed therein. The ends of the hinge element 4 are arranged to rest in these housings 10, 20. Preferably, the protrusions 40 have dimensions slightly smaller than the dimensions of the housing so as to be pivotable.
    FIG. 2a illustrates a top view of several rows of links of a watch band according to the invention. Each row is constituted in this example of a left link 1, a symmetrical right link 2 and three intermediate links 3. The invention is however not limited to bracelets comprising five links per row, it would be possible to inserting other intermediate links between the left and right links 1 and 2, or more simply, using only one link per row. Similarly, the invention is not limited to the particular shape of the illustrated links.
    The links of each row are held against each other between a portion of the links of the next row. The cylindrical rod 41 crosses all the intermediate links 3 of the row by an opening 30 having a diameter slightly greater than that of the rod 41, so as to allow a play-free pivoting of the rows of links relative to each other.
    A method for the manufacture of such a bracelet strand 1 according to a preferred embodiment will be described in what follows.
    In a first step, a file of the three-dimensional bracelet strand 1 is generated according to the desired dimensions by means of a CAD software.
    In a second step, the three-dimensional file is converted to create a predetermined number of layers of a selected thickness, and may for example be between 16 pm and 27 pm, each layer representing a section. transverse strand 100 of bracelet. Of course, the thickness of the layers can vary depending on the equipment and technology to achieve additive manufacturing.
    According to an optional step of the manufacturing method, the position and the orientation of the bracelet strand is chosen before defining the number and the thickness of the layers.
    Then, the bracelet strand 100 is formed layer by layer by means of additive manufacturing. Preferably, the additive manufacturing is carried out using the Multi-Jet Modeling (MJM) technology which is based on the principle of photo-polymerization of material under the effect of exposure to ultraviolet rays such as a photopolymer resin for example. The print head previously projects a photopolymer resin and a support material on a movable or stationary platen.
    Of course, other additive manufacturing technologies well known to those skilled in the art can be used for the manufacture of such a bracelet strand.
    Thus, the bracelet strand 100 is manufactured by successive jets, layer after layer, from photopolymers on a surface. In addition, the Multi-Jet Modeling technology is used to inject a gel-type removable support material to fill spaces / cavities that do not receive photopolymer material.
    Advantageously, the hinge element 4 is formed at the same time as the links so that the rod 41 and the projections 40 of the hinge element 4 respectively come to rest in the scope 30 formed in the intermediate link (s) 3 and in the housings 10, 20 of the lateral links 1 and 2.
    Finally, once the bracelet strand is completed, it is immersed in a liquid solution so as to eliminate the support material in the case of the Multi-Jet Modeling technology. The support material is usually a gel that is removed by immersing the bracelet strand into a solution.
    Preferably, the solution used is water mixture and basic solution of PH 14 concentration 5%.
    权利要求:
    Claims (7)
    [1]
    With these different aspects of the invention, there is a bracelet strand easily and quickly manufacturable, and whose length can be adapted to the wrist of the user during manufacture. Of course, the present invention is not limited to the example shown and is susceptible of various variations and modifications that will occur to those skilled in the art. claims
    A method of manufacturing an articulated bracelet strand, formed of at least two links, comprising the following steps: generating a 3D file of the bracelet strand; converting the 3D file into a plurality of layers by means of software, each layer representing a cross section of the bracelet strand; - forming the bracelet strand layer by layer by means of additive manufacturing; characterized in that the 3D file comprises at least one inner housing in at least one of the links, said housing being arranged to receive and maintain a hinge member, so that said at least two links form an indémontable articulated assembly.
    [2]
    2. The manufacturing method according to claim 1, wherein said articulation means (4) comprises a cylindrical rod (41) receiving an outgrowth (40) at each of its ends, each outgrowth being arranged to rest in said at least one housing.
    [3]
    3. Manufacturing method according to claim 1 or 2, wherein at least one link comprises a cylindrical seat arranged to receive said rod (41) of said hinge member.
    [4]
    4. Manufacturing method according to one of claims 1 to 3, wherein said at least one housing comprises a section of diameter D, and said scope a second section of diameter d smaller than the diameter D of the section of said housing.
    [5]
    5. Manufacturing method according to claim 1, comprising a step of washing the bracelet strand (100) formed, the bracelet strand being immersed in a solution.
    [6]
    6. The manufacturing method according to one of claims 1 to 5, wherein the additive manufacturing is carried out using the Multi-Jet Modeling technology.
    [7]
    7. Bracelet strand (100) obtained by the process according to claims 1 to 6.
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    同族专利:
    公开号 | 公开日
    CH713337B1|2021-03-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH01761/16A|CH713337B1|2016-12-30|2016-12-30|Method of manufacturing a bracelet strand by additive manufacturing.|CH01761/16A| CH713337B1|2016-12-30|2016-12-30|Method of manufacturing a bracelet strand by additive manufacturing.|
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