Actuation magnet for moving a closure needle of a hot-runner nozzle of an injection molding tool
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United States of America Patent
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Dec 7, 2010
Grant Date -
Nov 27, 2008
app pub date -
May 22, 2008
filing date -
May 23, 2007
priority date (Note) -
Expired
status (Latency Note)
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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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