Verfahren zur optischen Funktionalisierung einer durchsichtigen Uhrenkomponente

Details

Veröffentlichungs-Nr.

EP2578372

Aktenzeichen

EP11183804

Anmeldetag

4. Oktober 2011

Veröffentlichung

19. März 2014

Erteilung

19. März 2014

Rechtsraum

EP

IPC

B29C45/16G04B39/00G04B45/00

Abstract

The method for production and mechanical and/or optical functionalization of a transparent timepiece component, comprises selecting (AA) a first transparent material consisting of acrylic polymers or a methyl polymethacrylate, selecting (BB) a second molding polymerizable material for the production of a component layer, where the second molding polymerizable material consists of acrylic polymers, and forming (CC) a base body of the component in the first material, where the base body has a volume that is lower than that of the component. The method for production and mechanical and/or optical functionalization of a transparent timepiece component, comprises selecting (AA) a first transparent material consisting of acrylic polymers or a methyl polymethacrylate, selecting (BB) a second molding polymerizable material for the production of a component layer, where the second molding polymerizable material consists of acrylic polymers, forming (CC) a base body of the component in the first material, where the base body has a volume that is lower than that of the component and extends between the lower surface and an intermediate surface connected by an intermediate edge, structuring the mechanical and/or optical functionalization of the intermediate surface during the forming of the base body in a mold, defining (DD) layers to superimpose the base body to obtain a component, producing (EE), for each defined layer, a mold whose contact surface has volume that is lower than final volume of the component, where the mold comprises an edge comprising a bearing surface, positioning the mold at a distance of the intermediate surfaces corresponding to the thickness for the component with respect to the intermediate surface, injecting the second material into a cavity delimited by the contact surface of the mold at a temperature of 100-120[deg] C for 10-20 seconds, polymerizing the second material to obtain the component, removing the mold, and regenerating the operation of formation of a layer with another mold whose interior volume is higher than volume of the intermediate body obtained by the first mold. The transparent timepiece component comprises upper and lower surfaces connected by an edge extending according to a thickness of the component. The method further comprises insolating the intermediate body or the component by an UV radiation through the base body to obtain an improved hardness of the intermediate body or the component, applying a gripping force to the mold and the base body during the injection of the second material in the cavity, and structuring the optical and mechanical functionalization of the intermediate surface by striated sectors according to the thickness of the component. The second material is injected through an injection capillary network. The injection step is carried out at a pressure of higher than 100 MPa. The base body has a thickness 10-50 microns. Independent claims are included for: (1) a timepiece movement; and (2) a timepiece.

Anmelder

Firma

ETA SA Manufacture Horlogère Suisse

Land

🇨🇭 Schweiz

Fachgebiete