Secondary die mechanism for wagon tensioners with hooks according to claim 4, characterized in that it is connected by means of a limit bar of said second moving mode. The patent relates to the technical field of metal die-casting and forming and discloses a secondary die-opening mechanism with hooks, forming a cavity inside the combination of moving mode and stator, stator and moving, with an injection hole common to the cavity in the stator, a motion mode tensioner car including a dynamic mode and a second dynamic mode, with a mandrel connected to the second motion mode in the die cavity. In said one dynamic mode with a hook, on the hinge axis of the hook is mounted a torsion barrel, in the second dynamic mode is provided with a table shoulder corresponding to the end of this hook.