EP0006649B1 - Procédé de fabrication d'une boîte de montre et montre obtenue par ce procédé - Google Patents

Procédé de fabrication d'une boîte de montre et montre obtenue par ce procédé Download PDF

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Publication number
EP0006649B1
EP0006649B1 EP79200288A EP79200288A EP0006649B1 EP 0006649 B1 EP0006649 B1 EP 0006649B1 EP 79200288 A EP79200288 A EP 79200288A EP 79200288 A EP79200288 A EP 79200288A EP 0006649 B1 EP0006649 B1 EP 0006649B1
Authority
EP
European Patent Office
Prior art keywords
synthetic material
watch
case
overmolding
organic substance
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.)
Expired
Application number
EP79200288A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0006649A1 (fr
Inventor
Claude Maillard
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.)
Ervin Piquerez SA
Original Assignee
Ervin Piquerez 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 Ervin Piquerez SA filed Critical Ervin Piquerez SA
Priority to AT79200288T priority Critical patent/ATE155T1/de
Publication of EP0006649A1 publication Critical patent/EP0006649A1/fr
Application granted granted Critical
Publication of EP0006649B1 publication Critical patent/EP0006649B1/fr
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0002—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe
    • G04D3/0061—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components for protecting the mechanism against external influences
    • G04D3/0064—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components for protecting the mechanism against external influences for cases
    • 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
    • G04B37/00—Cases
    • G04B37/0008—Cases for pocket watches and wrist watches
    • 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
    • G04B37/00—Cases
    • G04B37/08—Hermetic sealing of openings, joints, passages or slits
    • G04B37/084—Complete encasings for wrist or pocket watches without means for hermetic sealing of winding stem or crown

Definitions

  • the present invention relates to a method of manufacturing a watch case whose interior of the middle has a plastic part, as well as a box obtained by this process.
  • the box can be in one or two pieces, round or shaped.
  • the object of the present invention is to eliminate any machining of taking up the inner surface of the middle part by a coating of synthetic material intended to absorb surface irregularities and whose elasticity is intended to absorb the differences in dimensions between the middle part, d 'on the one hand, and the bottom and the glass, on the other hand, so as to allow a tight fixing of the elements of the box without an auxiliary gasket.
  • the coating of synthetic material is preferably relatively hard, for example 90 shore, so as to ensure very good retention.
  • the method according to the invention is characterized in that the interior of the middle part is roughly used, that the surface thus machined is cleaned, that the cleaned surface is coated with a liquid organic agent adhering to the metal surface and to organic polymers and that the surface thus prepared is coated by overmolding with a synthetic material consisting of an organic polymer.
  • This process makes it possible to use shoulders whose interior is roughly stamped, of standard dimensions and shape, within very wide tolerances.
  • the synthetic material absorbs dimension variations and surface irregularities without further ado.
  • the precision which it is possible to obtain with regard to the dimensions of the overmolded synthetic material makes it possible without other to conform this material, by means of impressions, in such a way that it ensures a tight seal with the glass and with the bottom without the need to provide a seal for these joints. It is furthermore without other possibility to form the overmolded synthetic material so that it performs the function of enlargement circle or casing support.
  • the box shown in Figure 1 consists of a middle-bezel 1, a press-fitted back 2 and a crystal 3. It houses a movement 4 shown schematically. There is shown in dotted lines the location of a control member 5 for the rod which has been provided with a passage in the middle.
  • the interior of the middle part is coated with a synthetic material 7, thermosetting or thermo-plastic or elastomer, for example hard polyvinyl chloride, polyethylene, prolypropylene, a polyamide or a synthetic or natural rubber.
  • the synthetic material has a relatively high hardness of between 80 and 100 shore, preferably 90 shore.
  • the upper part 7a of the synthetic material constitutes a notch in which the glass 3 is fixed in leaktight manner.
  • the lower part 7b of this synthetic material provides a tight seal between the base 2 and the middle part 1.
  • the part 7c forms a flange against which the dial 8 rests.
  • the procedure is as follows: the interior of the middle part 1 is roughly machined, for example by stamping, then the interior surface of the middle part is thoroughly cleaned and the latter is coated with an agent organic liquid intended to ensure the adhesion of the synthetic material to the metal. Then we coat this surface with synthetic material 7 by overmolding, for example by thermomolding by means of impressions, according to a known technique, and the plastic part 7 is given the desired interior shape. After demolding the interior of the middle part is left as it is. The exterior of the middle part is finished according to the usual methods, before or after overmolding, as the case may be.
  • the manufacturing process will be illustrated by a few examples.
  • the raw build is first cleaned by ultrasound in a perchlorethylene bath.
  • a chemical cleaning is then carried out by immersing the middle part in a bath of alkali oxides diluted with water and heated to a temperature of 90 ° C.
  • a mixture of xylene and perchlorethylene is then applied, using a brush or a spray gun, to the inner surface of the middle part, followed by overmolding of hard polyvinyl chloride.
  • the raw middle part of the stamping is cleaned by ultrasound in trichlorethylene, then a chemical cleaning is carried out as in Example 1.
  • the surface of the middle part is cleaned as in Example 1 or II, then a mixture of methyl and ethyl ketone / xylene is applied with a brush or a spray gun, followed by overmolding of the organic polymer.
  • the middle part 9 has an interior surface 9a perfectly cylindrical or prismatic, a flange 10, also forming the notch of ice, and formed entirely of synthetic material of sufficient hardness, for example 90 shore. Thanks to the adhesion of the synthetic material, it can be seen that it is also possible to remove any axial anchoring means.
  • the middle part 11 came in one piece, rough, with a flange 12.
  • This flange 12 has however a certain number, for example 4, 6 or 8, bores or chimneys 13 at birth.
  • this material fills the chimneys and thus connects the synthetic material located above and below the flange 12 ensuring additional retention.
  • FIG. 4 shows an alternative embodiment of FIG. 2.
  • a metal flange 15, round or shaped is fixed on the synthetic material during overmolding.
  • the surface of the flange 15 intended for overmolding is prepared like that of the middle part 9.
  • this flange When the flange is covered with synthetic material according to FIG. 1 or constituted by the synthetic material itself according to FIG. 2, this flange can be metallized.
  • the process according to the invention can be applied to all metals, ferrous or non-ferrous, as well as to their alloys, such as, for example, steel, stainless steel, brass, carbides, borides, nitrides, nickel silver, titanium.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Refrigerator Housings (AREA)
  • Adornments (AREA)
EP79200288A 1978-06-14 1979-06-08 Procédé de fabrication d'une boîte de montre et montre obtenue par ce procédé Expired EP0006649B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79200288T ATE155T1 (de) 1978-06-14 1979-06-08 Verfahren zur herstellung eines uhrgehaeuses und nach diesem verfahren hergestellte uhr.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH648478A CH616808B (fr) 1978-06-14 1978-06-14 Procede de fabrication d'une boite de montre et boite de montre obtenue par ce procede.
CH6484/78 1978-06-14

Publications (2)

Publication Number Publication Date
EP0006649A1 EP0006649A1 (fr) 1980-01-09
EP0006649B1 true EP0006649B1 (fr) 1981-08-12

Family

ID=4310357

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79200288A Expired EP0006649B1 (fr) 1978-06-14 1979-06-08 Procédé de fabrication d'une boîte de montre et montre obtenue par ce procédé

Country Status (4)

Country Link
EP (1) EP0006649B1 (enrdf_load_stackoverflow)
AT (1) ATE155T1 (enrdf_load_stackoverflow)
CH (1) CH616808B (enrdf_load_stackoverflow)
DE (1) DE2960624D1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200021012A1 (it) * 2022-10-12 2024-04-12 Out Of The Box S R L Metodo di produzione di un orologio da polso

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3340314A1 (de) * 1983-03-05 1984-09-13 Gebrüder Junghans GmbH, 7230 Schramberg Armbanduhr mit dichtung
DE8306359U1 (de) * 1983-03-05 1989-05-24 Gebrüder Junghans GmbH, 7230 Schramberg Armbanduhr mit Dichtung
ES2259475T3 (es) * 1998-07-10 2006-10-01 Mallinckrodt Inc. Sintesis de compuestos utiles en la fabricacion de ketorolac.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH250010A (fr) * 1943-03-10 1947-07-31 Colomb Henri Boîte étanche pour montres et appareils de mesure.
CH357679A (fr) * 1959-09-30 1961-10-15 Emir S A Boîte étanche pour montre

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200021012A1 (it) * 2022-10-12 2024-04-12 Out Of The Box S R L Metodo di produzione di un orologio da polso
WO2024079681A1 (en) * 2022-10-12 2024-04-18 Out Of The Box S.R.L. Production method of a wristwatch

Also Published As

Publication number Publication date
EP0006649A1 (fr) 1980-01-09
DE2960624D1 (en) 1981-11-12
ATE155T1 (de) 1981-09-15
CH616808B (fr)
CH616808GA3 (enrdf_load_stackoverflow) 1980-04-30

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