CH701737B1 - Elastomer clock part i.e. watch strap, fabricating method, involves molding assembly by compression to reticulate elastomer blank and calendered sheet together, and carrying out material removal operation to reveal elastomer blank - Google Patents

Elastomer clock part i.e. watch strap, fabricating method, involves molding assembly by compression to reticulate elastomer blank and calendered sheet together, and carrying out material removal operation to reveal elastomer blank Download PDF

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Publication number
CH701737B1
CH701737B1 CH8362007A CH8362007A CH701737B1 CH 701737 B1 CH701737 B1 CH 701737B1 CH 8362007 A CH8362007 A CH 8362007A CH 8362007 A CH8362007 A CH 8362007A CH 701737 B1 CH701737 B1 CH 701737B1
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CH
Switzerland
Prior art keywords
elastomer
blank
reveal
elements
material removal
Prior art date
Application number
CH8362007A
Other languages
French (fr)
Inventor
Pascal Bourquard
Original Assignee
Biwi 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
Application filed by Biwi Sa filed Critical Biwi Sa
Priority to CH8362007A priority Critical patent/CH701737B1/en
Publication of CH701737B1 publication Critical patent/CH701737B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/20—Making multilayered or multicoloured articles
    • B29C43/203—Making multilayered articles
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C27/00—Making jewellery or other personal adornments
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C5/00—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
    • A44C5/0053—Flexible straps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0009—Cutting out
    • B29C2793/0018—Cutting out for making a hole
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/733—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence
    • B29C66/7332—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence at least one of the parts to be joined being coloured
    • B29C66/73321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence at least one of the parts to be joined being coloured both parts to be joined being coloured
    • B29C66/73322—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence at least one of the parts to be joined being coloured both parts to be joined being coloured both parts to be joined having a different colour
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7375—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured
    • B29C66/73751—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being uncured, i.e. non cross-linked, non vulcanized
    • B29C66/73752—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being uncured, i.e. non cross-linked, non vulcanized the to-be-joined areas of both parts to be joined being uncured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • B29C66/949—Measuring or controlling the joining process by measuring or controlling the time characterised by specific time values or ranges

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Adornments (AREA)

Abstract

The method involves obtaining an elastomer blank, and arranging a calendared sheet (16) made of elastomer to cover the elastomer blank. An assembly is molded by compression to reticulate the elastomer blank and the calendered sheet together, and a material removal operation is carried out to reveal the elastomer blank. The blank is formed with an elastomer element (10), and an opening (12') is formed in the element, where two sides of the element defines an upper face and a lower face. Another elastomer element i.e. multicolored part (14) is arranged in another opening (12).

Description

Domaine techniqueTechnical area

[0001] La présente invention se rapporte au domaine de la fabrication de pièces. Elle concerne, plus particulièrement, un procédé de réalisation d’une pièce en élastomère, qui peut s’appliquer de manière avantageuse au domaine de l’horlogerie, notamment de l’habillage ou à d’autres domaines industriels utilisant le caoutchouc ou divers élastomères. The present invention relates to the field of manufacturing parts. It relates, more particularly, to a method of producing an elastomer part, which can advantageously be applied to the field of watchmaking, in particular of the covering or to other industrial areas using rubber or various elastomers .

Etat de la techniqueState of the art

[0002] Il est connu de fabriquer des pièces telles que des bracelets de montre, en caoutchouc naturel ou synthétique, ou en diverses matières plastiques. Ces bracelets sont généralement réalisés par moulage, le moule comportant éventuellement des structures permettant de faire apparaître sur le bracelet des éléments graphiques, tels qu’une marque ou un logo. Seul le relief permet de discerner la forme ou l’inscription, sans utilisation d’aucune couleur. It is known to manufacture such parts as watch straps, natural or synthetic rubber, or various plastics. These bracelets are generally made by molding, the mold optionally comprising structures for displaying on the bracelet graphic elements, such as a mark or a logo. Only the relief makes it possible to discern the shape or the inscription, without use of any color.

[0003] Sur certains bracelets plastiques ou thermoplastiques, au lieu que la marque soit disposée en relief, celle-ci est imprimée dessus. Toutefois, la tenue des couleurs n’est pas satisfaisante et le rendu n’est généralement pas acceptable pour des bracelets destinés à équiper des pièces haut de gamme. On some plastic or thermoplastic bracelets, instead of the mark is arranged in relief, it is printed on it. However, the color behavior is not satisfactory and the rendering is generally not acceptable for bracelets for equipping high-end parts.

[0004] D’autres bracelets plastiques ou thermoplastiques sont également formés de plusieurs éléments, de couleurs différentes, disposés côte à côte, ce qui permet de donner un bracelet multicolore. Il n’est toutefois pas possible d’utiliser ces éléments de couleurs différentes pour apposer une marque ou une inscription sur le bracelet. [0004] Other plastic or thermoplastic bracelets are also formed of several elements, of different colors, arranged side by side, which makes it possible to give a multicolored bracelet. However, it is not possible to use these elements of different colors to affix a mark or inscription on the bracelet.

[0005] La présente invention a pour but de pallier les inconvénients ci-dessus lors de l’obtention de pièces en élastomères, telles que des bracelets, mais pas seulement, arborant une inscription ou une marque qui peut être en couleur. L’invention a également pour objectif de permettre la réalisation d’inscriptions présentant une bonne tenue dans le temps et un rendu esthétique agréable. The present invention aims to overcome the disadvantages above when obtaining elastomeric parts, such as bracelets, but not only, bearing an inscription or a mark that can be in color. The invention also aims to allow the realization of inscriptions with good behavior over time and a pleasant aesthetic appearance.

Divulgation de l’inventionDisclosure of the invention

[0006] Pour atteindre ces buts, l’invention concerne un procédé dont les caractéristiques sont mentionnées dans les revendications. To achieve these objects, the invention relates to a method whose characteristics are mentioned in the claims.

Brève description des dessinsBrief description of the drawings

[0007] D’autres caractéristiques de la présente invention apparaîtront plus clairement à la lecture de la description qui va suivre, faite en référence au dessin annexé, dans lequel la fig. 1 représente schématiquement les différentes étapes du procédé. Other features of the present invention will appear more clearly on reading the description which follows, with reference to the accompanying drawing, in which FIG. 1 schematically represents the various steps of the method.

Mode(s) de réalisation de l’inventionMode (s) of realization of the invention

[0008] Dans la description qui va suivre, le procédé selon l’invention est appliqué, à titre d’exemple non limitatif, à la réalisation d’un bracelet de montre. In the following description, the method according to the invention is applied, by way of non-limiting example, to the production of a watch strap.

[0009] Selon un premier mode de réalisation, une première étape consiste à se doter d’un premier élément 10 en élastomère, ayant sensiblement la forme de la pièce que l’on souhaite obtenir. Ce premier élément 10 peut être obtenu, par exemple, en comprimant un élastomère dans un moule ayant la géométrie souhaitée, à une température ne permettant pas à l’élastomère de vulcaniser. According to a first embodiment, a first step is to provide a first element 10 of elastomer, having substantially the shape of the part that is desired. This first element 10 can be obtained, for example, by compressing an elastomer in a mold having the desired geometry, at a temperature that does not allow the elastomer to vulcanize.

[0010] Une ouverture 12 est ensuite ménagée dans le premier élément 10, au moyen d’un outil de découpe. Comme on le comprendra ci-après, l’ouverture 12 est réalisée à un endroit du premier élément 10 où on souhaite faire apparaître une inscription ou un décor. Cette ouverture 12 peut être disposée dans une portion centrale de l’élément 10. On a également représenté en pointillés, une ouverture 12 ́ disposée sur une portion latérale de l’élément 10, de manière à déboucher sur le côté de l’élément 10. Dans l’exemple décrit, l’ouverture est traversante, mais ce n’est pas obligatoire. En outre, l’ouverture peut être disposée en tout endroit du bracelet. An opening 12 is then formed in the first element 10, by means of a cutting tool. As will be understood below, the opening 12 is made at a location of the first element 10 where it is desired to display an inscription or a decoration. This opening 12 can be arranged in a central portion of the element 10. A dotted line 12 is also shown, an opening 12 disposed on a lateral portion of the element 10, so as to open on the side of the element 10. In the example described, the opening is through, but it is not mandatory. In addition, the opening may be disposed at any location of the bracelet.

[0011] Une deuxième étape du procédé consiste à disposer un deuxième élément 14 en élastomère dans l’ouverture 12. Ce deuxième élément 14 est, avantageusement, d’une couleur différente de celle du premier élément 10. De préférence, les deux couleurs choisies pour les deux éléments 10 et 14 présentent un contraste esthétique. Le deuxième élément 14 est dimensionné de manière à avoir la même épaisseur que le premier 10 et à présenter, globalement, les mêmes dimensions que l’ouverture, sans qu’une précision particulière soit nécessaire pour le dimensionnement. Qu’un jeu existe entre les deux éléments ou que le deuxième élément soit légèrement comprimé dans l’ouverture n’a pas d’importance pour la suite du procédé. Le deuxième élément 14 peut être obtenu, comme le premier, par exemple, en comprimant un élastomère dans un moule ayant la géométrie souhaitée, à une température ne permettant pas à l’élastomère de vulcaniser. Le premier et les deuxièmes éléments forment ensemble une ébauche ayant sensiblement la forme de la pièce que l’on souhaite obtenir. A second step of the method consists in arranging a second elastomer element 14 in the opening 12. This second element 14 is advantageously of a different color from that of the first element 10. Preferably, the two chosen colors for the two elements 10 and 14 have an aesthetic contrast. The second element 14 is dimensioned so as to have the same thickness as the first 10 and to have, overall, the same dimensions as the opening, without any particular precision being necessary for the dimensioning. Whether a game exists between the two elements or that the second element is slightly compressed in the opening does not matter for the rest of the process. The second element 14 can be obtained, as the first, for example, by compressing an elastomer in a mold having the desired geometry, at a temperature that does not allow the elastomer to vulcanize. The first and second elements together form a blank having substantially the shape of the part that is desired.

[0012] Les deux côtés du premier élément 10 définissent une première et une deuxième face, la première étant, par exemple, la face supérieure orientée de manière à être visible lorsque le bracelet sera utilisé. Both sides of the first element 10 define a first and a second face, the first being, for example, the upper face oriented so as to be visible when the bracelet will be used.

[0013] Une première feuille 16 calandrée en élastomère, présentant sensiblement la longueur et la largeur du bracelet que l’on souhaite obtenir, est ensuite disposée du côté de la première face de manière à recouvrir l’ébauche. Son épaisseur est comprise entre 0,2 et 1 mm, de préférence entre 0,35 et 0,45 mm. La feuille 16 est obtenue par des opérations de calandrage et de découpage. L’élastomère utilisé pour réaliser cette feuille n’a pas été vulcanisé. A first sheet 16 calendered elastomer, having substantially the length and width of the bracelet that is desired, is then disposed on the side of the first face so as to cover the blank. Its thickness is between 0.2 and 1 mm, preferably between 0.35 and 0.45 mm. The sheet 16 is obtained by calendering and cutting operations. The elastomer used to make this sheet has not been vulcanized.

[0014] Eventuellement, une deuxième feuille calandrée 18 similaire à la première, peut être disposée du côté de la deuxième face de manière à recouvrir l’ébauche. Cette deuxième feuille peut être d’une couleur différente de celle de la première feuille. Optionally, a second calendered sheet 18 similar to the first, may be disposed on the side of the second face so as to cover the blank. This second sheet may be of a different color from that of the first sheet.

[0015] Ensuite, l’ensemble obtenu est moulé par compression de manière à réticuler ensemble les éléments 10 et 14 et la ou les feuilles 16 et 18. Afin de permettre la réticulation, l’opération de moulage est généralement effectuée pendant 90 à 200 secondes (selon l’épaisseur des éléments), typiquement 150 secondes, à une température comprise entre 160 et 200 °C, de préférence entre 165 et 175 °C, en appliquant une force de fermeture allant de 5 à 100 tonnes. L’homme du métier pourra adapter les différents paramètres en fonction de l’élastomère mis en œuvre et des dimensions de la pièce à obtenir. Ces conditions permettent d’obtenir une réticulation du premier 10 et du deuxième 14 éléments, quel que soit le rapport dimensionnel entre ce dernier et l’ouverture 12. Then, the assembly obtained is compression molded so as to crosslink together the elements 10 and 14 and the or sheets 16 and 18. In order to allow the crosslinking, the molding operation is generally carried out for 90 to 200 hours. seconds (depending on the thickness of the elements), typically 150 seconds, at a temperature between 160 and 200 ° C, preferably between 165 and 175 ° C, applying a closing force ranging from 5 to 100 tonnes. Those skilled in the art will be able to adapt the various parameters according to the elastomer used and the dimensions of the part to be obtained. These conditions make it possible to obtain crosslinking of the first 10 and second 14 elements, regardless of the dimensional relationship between the latter and the opening 12.

[0016] Enfin, de la matière est enlevée au moins de la première feuille calandrée 16, de manière à faire apparaître le deuxième élément 14. Par exemple, cette opération peut être faite par gravage laser ou par usinage, notamment par fraisage. Cette opération permet de faire apparaître, en creux et, éventuellement dans une couleur contrastant avec la couleur extérieure du bracelet, une marque, un dessin, un texte, un logo... de manière particulièrement nette et précise. En disposant le deuxième élément 12 ́ sur la partie latérale du bracelet, il est possible de faire apparaître une ligne colorée sur la tranche du bracelet. Finally, the material is removed at least from the first calendered sheet 16, so as to reveal the second element 14. For example, this operation can be done by laser engraving or machining, including milling. This operation makes it possible to reveal, in hollow and possibly in a color contrasting with the external color of the bracelet, a mark, a design, a text, a logo ... in a particularly clear and precise manner. By arranging the second element 12 on the lateral part of the bracelet, it is possible to reveal a colored line on the edge of the bracelet.

[0017] L’élastomère utilisé pour les éléments et les feuilles calandrées est de même nature chimique. De préférence, il est identique. Si les différentes parties sont réalisées avec des élastomères différents, on les choisira de manière à ce que leur nature chimique permette une réticulation entre eux. The elastomer used for the elements and the calendered leaves is of the same chemical nature. Preferably, it is identical. If the different parts are made with different elastomers, we will choose them so that their chemical nature allows crosslinking between them.

[0018] A titre d’exemple, les élastomères utilisés peuvent être choisis parmi les élastomères généraux, tels que du caoutchouc naturel, du polyisoprène, un copolymère de butadiène et de styrène, connu sous l’abréviation SBR, ou encore, du polybutadiène. Les élastomères peuvent également être choisis parmi les élastomères spéciaux, comme par exemple un copolymère d’isobutylène et d’isoprène, connu sous l’abréviation d’IIR, du polychloroprène, un copolymère d’éthylène et de propylèn-diène, connu sous le nom d’EPDM, ou encore un copolymère d’éthylène et de propylène, connu sous le nom d’EPM. By way of example, the elastomers used may be chosen from general elastomers, such as natural rubber, polyisoprene, a copolymer of butadiene and styrene, known by the abbreviation SBR, or else polybutadiene. The elastomers may also be chosen from special elastomers, such as, for example, a copolymer of isobutylene and isoprene, known by the abbreviation of IIR, polychloroprene, a copolymer of ethylene and propylene-diene, known as EPDM name, or a copolymer of ethylene and propylene, known as EPM.

[0019] La description ci-dessus a été donnée à titre d’illustration non limitative de l’invention. L’homme du métier pourra l’adapter sans sortir du cadre de l’invention. Ainsi, il est possible de ne disposer qu’une feuille calandrée sur une ébauche venue d’une pièce, c’est-à-dire ne comportant qu’un élément ayant sensiblement la forme de l’objet que l’on souhaite obtenir, la feuille et l’ébauche étant de couleurs différentes. Dans un deuxième temps, la feuille est gravée ou usinée de manière à faire apparaître l’ébauche et ainsi dessiner un motif ou un logo, qui peut apparaître en creux ou en saillie. The above description has been given by way of non-limiting illustration of the invention. The skilled person can adapt without departing from the scope of the invention. Thus, it is possible to have a calendered sheet on a blank coming from a part, that is to say having only one element having substantially the shape of the object that is desired, the sheet and the blank being of different colors. In a second step, the sheet is etched or machined so as to reveal the blank and thus draw a pattern or logo, which may appear hollow or protruding.

[0020] Si une deuxième feuille calandrée est disposée sur la deuxième face du premier élément 10, il est également possible d’y réaliser une opération d’enlèvement de matière pour faire apparaître un motif également de ce côté. If a second calendered sheet is disposed on the second face of the first member 10, it is also possible to perform a material removal operation to reveal a pattern also on this side.

[0021] Une pluralité de deuxièmes éléments, éventuellement de couleurs variées, peut être logée dans l’ouverture 12 ou dans plusieurs ouvertures, afin de faire apparaître un motif multicolore. En pratique, on peut utiliser une pièce 14 multicolore. A plurality of second elements, optionally of various colors, may be housed in the opening 12 or in several openings, in order to reveal a multicolored pattern. In practice, it is possible to use a multicolored piece 14.

[0022] Le procédé selon l’invention peut également être utilisé pour réaliser diverses pièces d’horlogerie, telles que des inserts destinés à être logés dans des couronnes de montre, ou des parties de fonds de boites ou toute autre pièces pouvant être réalisées en élastomères et sur lesquelles il peut être intéressant d’apposer un élément décoratif. The method according to the invention can also be used to produce various timepieces, such as inserts intended to be housed in watch crowns, or parts of can bottoms or any other parts that can be made in accordance with the invention. elastomers and on which it may be interesting to affix a decorative element.

Claims (8)

1. Procédé de réalisation d’une pièce d’horlogerie en élastomère, comportant les étapes suivantes: – se doter d’une ébauche en élastomère, ayant sensiblement la forme de la pièce que l’on souhaite obtenir, – disposer une première feuille calandrée (16) en élastomère de manière à recouvrir l’ébauche, – mouler l’ensemble par compression de manière à réticuler ensemble l’ébauche et la feuille, et – effectuer une opération d’enlèvement de matière de manière à faire apparaître ladite ébauche.1. A method of producing an elastomer timepiece, comprising the following steps: - Have an elastomer blank, having substantially the shape of the part that is desired, - Have a first calendered sheet (16) of elastomer so as to cover the blank, Molding the assembly by compression so as to crosslink together the blank and the sheet, and - Perform a material removal operation so as to reveal said blank. 2. Procédé selon la revendication précédente, caractérisé en ce que l’ébauche comporte: – un premier élément (10), ayant sensiblement la forme de la pièce que l’on souhaite obtenir, ledit élément comportant une ouverture, les deux côtés dudit élément définissant une face supérieure et une face inférieure, et – un deuxième élément (14) en élastomère disposé dans l’ouverture, ledit deuxième élément étant de même épaisseur que le premier.2. Method according to the preceding claim, characterized in that the blank comprises: A first element (10) having substantially the shape of the part that it is desired to obtain, said element having an opening, the two sides of said element defining an upper face and a lower face, and A second elastomer element (14) disposed in the opening, said second element being of the same thickness as the first element. 3. Procédé selon la revendication 2, caractérisé en ce qu’il comporte, avant l’étape de moulage, une étape au cours de laquelle on dispose une deuxième feuille calandrée (18) en élastomère sur la deuxième face, ladite deuxième feuille étant réticulée aux premier et deuxième éléments lors de l’étape de moulage.3. Method according to claim 2, characterized in that it comprises, before the molding step, a step during which there is disposed a second calendered sheet (18) of elastomer on the second face, said second sheet being crosslinked to the first and second elements during the molding step. 4. Procédé selon l’une des revendications 2 à 3, caractérisé en ce que les éléments (10, 14) et les feuilles (16, 18) sont de nature chimique similaire, de manière à pouvoir être réticulés ensemble.4. Method according to one of claims 2 to 3, characterized in that the elements (10, 14) and the sheets (16, 18) are of similar chemical nature, so as to be crosslinked together. 5. Procédé selon la revendication 4, caractérisé en ce que les éléments (10, 14) et les feuilles (16, 18) sont réalisés dans le même élastomère.5. Method according to claim 4, characterized in that the elements (10, 14) and the sheets (16, 18) are made in the same elastomer. 6. Procédé selon l’une des revendications précédentes, caractérisé en ce que l’opération d’enlèvement de matière est réalisée par gravage laser ou par usinage.6. Method according to one of the preceding claims, characterized in that the material removal operation is performed by laser etching or machining. 7. Procédé selon la revendication 2, caractérisé en ce que le premier et les deuxièmes éléments sont de couleurs différentes.7. Method according to claim 2, characterized in that the first and the second elements are of different colors. 8. Procédé selon la revendication 3, caractérisé en ce que lesdits éléments et ladite feuille ne sont pas vulcanisés avant l’étape de moulage.8. Method according to claim 3, characterized in that said elements and said sheet are not vulcanized before the molding step.
CH8362007A 2007-05-24 2007-05-24 Elastomer clock part i.e. watch strap, fabricating method, involves molding assembly by compression to reticulate elastomer blank and calendered sheet together, and carrying out material removal operation to reveal elastomer blank CH701737B1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20130705A1 (en) * 2013-04-30 2014-10-31 Mestel Rss S R L PROCESS OF MANUFACTURE OF A RIGID COMPONENT PROVIDED WITH AN ELASTOMERIC COATING
IT201800010756A1 (en) * 2018-12-03 2020-06-03 Salim Mouhadab PROCESS OF MANUFACTURING OF ORNAMENTAL OBJECTS
EP3718727A1 (en) * 2019-04-05 2020-10-07 Biwi S.A. Production of elastomer parts produced by duplication from a reference standard model
CN111791399A (en) * 2019-04-05 2020-10-20 比维有限公司 Production of repeatedly manufactured elastomeric components based on reference standard dies
CN116001301A (en) * 2022-12-31 2023-04-25 博材智能科技(东台)有限公司 Forming process of multicolor fluororubber watchband

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20130705A1 (en) * 2013-04-30 2014-10-31 Mestel Rss S R L PROCESS OF MANUFACTURE OF A RIGID COMPONENT PROVIDED WITH AN ELASTOMERIC COATING
IT201800010756A1 (en) * 2018-12-03 2020-06-03 Salim Mouhadab PROCESS OF MANUFACTURING OF ORNAMENTAL OBJECTS
EP3718727A1 (en) * 2019-04-05 2020-10-07 Biwi S.A. Production of elastomer parts produced by duplication from a reference standard model
CN111791399A (en) * 2019-04-05 2020-10-20 比维有限公司 Production of repeatedly manufactured elastomeric components based on reference standard dies
JP2020172101A (en) * 2019-04-05 2020-10-22 ビウイ ソシエテ アノニム Manufacture of elastomeric parts made by replication based on the reference standard model
JP7563876B2 (en) 2019-04-05 2024-10-08 ビウイ ソシエテ アノニム Manufacturing of elastomeric parts by duplication based on reference standard models
CN116001301A (en) * 2022-12-31 2023-04-25 博材智能科技(东台)有限公司 Forming process of multicolor fluororubber watchband

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