Process for producing an item of jewellery

Abstract

A process for producing an item of jewellery, in which a set stone ( 1 ) is fitted into a previously produced recess ( 9 ) in a cast metal body ( 5 ), wherein a part of the setting ( 2 ) is deformed and the stress produced by deformation holds the setting ( 2 ) together with the stone ( 1 ) fast; the recess ( 9 ) of the metal body ( 5 ) acquires in the casting operation its shape which causes deformation of the setting ( 2 ).

1 . A process for producing an item of jewellery, in which a set stone is fitted into a previously produced recess in a cast metal body, wherein a part of the setting is deformed and the stress produced by deformation holds the setting together with the stone fast, characterised in that the recess ( 9 ) of the metal body ( 5 ) acquires in the casting operation its shape which causes deformation of the setting ( 2 ).  
     
     
         2 . A process according to  claim 1  characterised in that the core ( 6 ) which fills the recess ( 9 ) in the casting operation for the metal body ( 5 ) is removed after the casting step by acid treatment.  
     
     
         3 . A mould insert for the mould used for casting the metal body in the process according to  claim 1  characterised in that its surface is identical to that of the inserted setting.  
     
     
         4 . A mould insert according to  claim 3  characterised by being in the configuration of a core ( 6 ) which is usual for the fine casting of carbon steels using the wax melting-out process and which comprises quartz with additions of zirconium and aluminium oxide.  
     
     
         5 . An item of jewellery which is produced using the process according to  claim 1  characterised in that the setting ( 2 ) of the stone ( 1 ) is non-round, in particular quadrangular.