Method for manufacturing a horological disc and horological disc obtained by its implementation

Patent metadata

Field	Value
Publication number	US-12147200-B2
Application number	US-202217692303-A
Country	US
Kind code	B2
Filing date	Mar 11, 2022
Priority date	Apr 16, 2021
Publication date	Nov 19, 2024
Grant date	Nov 19, 2024

Abstract

A method for manufacturing a horological mobile ( 10 ) including: depositing a first thin layer ( 11 ) with a first material including at least nickel, the periphery of which defines the contour of the geometry of the horological mobile ( 10 ); depositing an intermediate layer ( 12 ), with a second material including at least nickel and phosphorus, so as to cover a face of the first thin layer ( 11 ), the periphery of which corresponds to that of the geometric shape of the first thin layer ( 11 ); depositing a second thin layer ( 13 ) with the first material, so as to cover a face of the intermediate layer ( 12 ), the periphery of which corresponds to that of the geometric shape of the first thin layer ( 11 ), wherein the first and the second thin layer ( 11, 13 ) are poorer in phosphorus than the intermediate layer ( 12 ), or do not contain any phosphorus.

First claim

The invention claimed is:

1. A method for manufacturing a horological mobile ( 10 ), comprising successive steps of:
depositing ( 101 ) a first thin layer ( 11 ) with a first material including at least nickel, according to a geometric shape, the periphery of which defines the contour of the geometry of the horological mobile ( 10 );
depositing ( 102 ) an intermediate layer ( 12 ), with a second material including at least nickel and phosphorus, so as to cover a face of the first thin layer ( 11 ) and so as to have a geometric shape, the periphery of which corresponds to that of the geometric shape of the first thin layer ( 11 ); and
depositing ( 103 ) a second thin layer ( 13 ) with the first material, so as to cover a face of the intermediate layer ( 12 ) and so as to have a geometric shape, the periphery of which corresponds to that of the geometric shape of the first thin layer ( 11 ),
wherein the first and the second thin layer ( 11 , 13 ) being poorer in phosphorus than the intermediate layer ( 12 ), or not containing any phosphorus, and
wherein the first material includes only pure nickel, or only nickel and phosphorus.

2. The method according to claim 1 , wherein the intermediate layer ( 12 ) is superimposed on the first thin layer ( 11 ) and the second thin layer ( 13 ) is superimposed on the intermediate layer ( 12 ), respectively at at least one interface face ( 14 ) contiguous to at least one friction face ( 15 ) of the horological mobile ( 10 ) intended to be in contact with another horological component.

3. The method according to claim 2 , wherein the steps of depositing ( 101 , 102 and 103 ) the first thin layer ( 11 ), the intermediate layer ( 12 ) and the second thin layer ( 13 ) are implemented by LIGA.

4. The method according to claim 1 , wherein the second material consists only of nickel and of phosphorus.

5. The method according to claim 1 , wherein the second material has a proportion by weight of phosphorus between 1% and 15%.

6. The method according to claim 5 , wherein the second material is made from NiP12.

7. The method according to claim 1 , wherein the first material comprises a proportion by weight of phosphorus less than or equal to 9%.

8. The method according to claim 7 , wherein the first material comprise a proportion by weight of phosphorus between 0% and 1%.

9. The method according to claim 1 , wherein the first material comprises boron.

10. The method according to claim 9 , wherein the first material consists only of nickel and of boron.

11. The method according to claim 1 , wherein the first material has a thickness between 0.2 micrometres and 10 micrometres.

12. The method according to claim 1 , wherein a heat treatment is applied to an assembly formed by the first thin layer ( 11 ), by the intermediate layer ( 12 ) and the second thin layer ( 13 ), at a temperature between 100° C. and 500° C., for 1 to 8 hours.

13. The method according to claim 1 , characterised in that it is applied to the manufacturing of an escapement mobile which is an escapement wheel or pallets.

14. A method for manufacturing a horological mobile ( 10 ), comprising successive steps of:
depositing ( 101 ) a first thin layer ( 11 ) with a first material including at least nickel, according to a geometric shape, the periphery of which defines the contour of the geometry of the horological mobile ( 10 );
depositing ( 102 ) an intermediate layer ( 12 ), with a second material including at least nickel and phosphorus, so as to cover a face of the first thin layer ( 11 ) and so as to have a geometric shape, the periphery of which corresponds to that of the geometric shape of the first thin layer ( 11 ); and
depositing ( 103 ) a second thin layer ( 13 ) with the first material, so as to cover a face of the intermediate layer ( 12 ) and so as to have a geometric shape, the periphery of which corresponds to that of the geometric shape of the first thin layer ( 11 ),
wherein the first and the second thin layer ( 11 , 13 ) being poorer in phosphorus than the intermediate layer ( 12 ), or not containing any phosphorus, and
wherein the first material comprises a proportion by weight of phosphorus between 6% and 9%.

15. A method for manufacturing a horological mobile ( 10 ), comprising successive steps of:
depositing ( 101 ) a first thin layer ( 11 ) with a first material including at least nickel, according to a geometric shape, the periphery of which defines the contour of the geometry of the horological mobile ( 10 );
depositing ( 102 ) an intermediate layer ( 12 ), with a second material including at least nickel and phosphorus, so as to cover a face of the first thin layer ( 11 ) and so as to have a geometric shape, the periphery of which corresponds to that of the geometric shape of the first thin layer ( 11 ); and
depositing ( 103 ) a second thin layer ( 13 ) with the first material, so as to cover a face of the intermediate layer ( 12 ) and so as to have a geometric shape, the periphery of which corresponds to that of the geometric shape of the first thin layer ( 11 ),
wherein the first and the second thin layer ( 11 , 13 ) being poorer in phosphorus than the intermediate layer ( 12 ), or not containing any phosphorus, and
wherein the first material comprises a proportion by weight of phosphorus between 1% and 6%.

16. A method for manufacturing a horological mobile ( 10 ), comprising successive steps of:
depositing ( 101 ) a first thin layer ( 11 ) with a first material including at least nickel, according to a geometric shape, the periphery of which defines the contour of the geometry of the horological mobile ( 10 );
depositing ( 102 ) an intermediate layer ( 12 ), with a second material including at least nickel and phosphorus, so as to cover a face of the first thin layer ( 11 ) and so as to have a geometric shape, the periphery of which corresponds to that of the geometric shape of the first thin layer ( 11 ); and
depositing ( 103 ) a second thin layer ( 13 ) with the first material, so as to cover a face of the intermediate layer ( 12 ) and so as to have a geometric shape, the periphery of which corresponds to that of the geometric shape of the first thin layer ( 11 ),
wherein the first and the second thin layer ( 11 , 13 ) being poorer in phosphorus than the intermediate layer ( 12 ), or not containing any phosphorus, wherein the first thin layer ( 11 ), the intermediate layer ( 12 ) and the second thin layer ( 13 ) are deposited so that the horological mobile ( 10 ) formed includes, in the orientation and in the direction of growth of deposition of said layers, a gradient of concentration of phosphorus defined by a progressive increase through the first thin layer ( 11 ), a stable state through the intermediate layer ( 12 ) and a decrease through the second thin layer ( 13 ).

Assignees

• Eta Sa Mft Horlogere Suisse

Inventors

• Nicoud Serge
• Roder Sébastien

Classifications

• G04B15/14 Primary

  Component parts or constructional details, e.g. construction of the lever or the escape wheel {(assembly and manufacture of the spring G04B1/145; assembly and manufacture of components, e.g. pinions, spindles G04B13/02; lubrication of clockwork bearings G04B31/008; oils for clockwork bearings in general G04B31/08)} · CPC title

• C25D7/00

  Electroplating characterised by the article coated · CPC title

• C25D3/12

  of nickel or cobalt · CPC title

• G04B31/08

  Lubrication {(self-lubricated plastic bearings G04B31/016; lubrication of the escape wheel G04B15/14; lubrication of synchronous clockworks G04C15/009; lubrication devices and lubricant containers G04D5/00)} · CPC title

• G04B43/007

  Antimagnetic alloys (antimagnetic alloys with temperature compensation G04B17/227; apparatus for antimagnetising G04D9/00; alloys in general C22C) · CPC title