A solenoid for moving a valve pin of a hot runner nozzle of an injection molding tool

A solenoid for moving a valve pin of a hot runner nozzle of an injection molding tool, wherein the actuating magnet having an armature (1) which is coupled for movement with the shut-off needle and by applying current to a coil (10) between a first armature stop (3) and a second armature stop (4) is displaceable and wherein the actuating magnet comprises a first permanent magnet (5) which is arranged such that it exerts, in at least one direction of movement, an additional magnetic force on the armature (1), wherein the first permanent magnet (5) an axially magnetized magnet ring (5) is a second, opposed axially magnetized magnet ring (7) is provided, between the first and second magnetic rings (5, 7), a pole ring (6) is arranged and wherein the armature (1) within the coaxially arranged ring magnets ( 5, 7) and the pole ring (6) is displaceable, characterized in that the magnetic rings (5, 7) and the P olring (6) by a fixing and / or guide tube (9, 61) are held.