Actuation magnet for moving a closure needle of a hot-runner...

Details Actuation magnet for moving a closure needle of a hot-runner... Actuation magnet for moving a closure needle of a hot-runner...

2008-05-22

2010-12-07

Enad, Elvin G (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

C335S220000, C335S229000, C335S266000

Reexamination Certificate

active

07847661

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.

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