Actuation magnet for moving a closure needle of a hot-runner nozzle of an injection molding tool
AssigneeKuhnke Automation GmbH & Co. KG
InventorsMathias Jotter, Borgar Pfeiffer, Manfred Rufer, Jens Storjohann, Wolfram Heisen
Life of this patent
Estimating the term…
Abstract
An actuation magnet is provided for moving a closure needle of a hot-runner nozzle of an injection molding tool. The actuation magnet has an armature which is coupled in movement to the closure needle and may be displaced between first and second cores by subjecting at least one coil to current. A permanent magnet is arranged in a manner such that it exerts an additional magnetic force on the armature in at least one, preferably two, movement directions.
Claims8
An actuation magnet (2) for moving a closure needle of a hot-runner nozzle of an injection-molding tool, the actuation magnet comprising an armature (20) coupled in movement to a closure needle (18), the armature being displaceable between first and second cores (10, 12) by subjecting at least one coil (6, 8) to current, and a permanent magnet (32) arranged in a manner such that it exerts an additional magnetic force on the armature (20) in at least one movement direction (B, C).
Dependencies are inferred from the claim text.