PROCESS FOR PRODUCING A BALANCE WHEEL FOR A TIMEPIECE

PROCESS FOR PRODUCING A BALANCE WHEEL FOR A TIMEPIECE

A process for producing a metal alloy balance wheel by molding, the process including the following steps: a) making a mold in the negative shape of the balance wheel, b) getting hold of a metal alloy that has a thermal expansion coefficient of less than 25 ppm/° C. and is able to be in an at least...

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Bibliographische Detailangaben
Hauptverfasser: Haemmerli, Alexandre, Winkler, Yves, Helfer, Jean-Luc, Gueissaz, Francois, Di Domenico, Gianni, Winkler, Pascal, Willemin, Michel, Martin, Jean-Claude, Corson, Donald William, Hinaux, Baptiste, Paratte, Lionel, Tombez, Lionel
Format: Patent
Sprache:eng
Schlagworte:
HOROLOGY
MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL
MECHANICALLY-DRIVEN CLOCKS OR WATCHES
PHYSICS
TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
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Beschreibung
Zusammenfassung:A process for producing a metal alloy balance wheel by molding, the process including the following steps: a) making a mold in the negative shape of the balance wheel, b) getting hold of a metal alloy that has a thermal expansion coefficient of less than 25 ppm/° C. and is able to be in an at least partly amorphous state when it is heated to a temperature between its glass transition temperature and its crystallization temperature, c) putting the metal alloy into the mold, the metal alloy being heated to a temperature between its glass transition temperature and its crystallization temperature so as to be hot-molded and to form a balance wheel, d) cooling the metal alloy to obtain a balance wheel made of the metal alloy, e) releasing the balance wheel obtained in step d) from its mold.