Laminated solenoid plunger for solenoid assembly
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United States of America Patent
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Aug 19, 2008
Grant Date -
Dec 20, 2007
app pub date -
Jun 14, 2006
filing date -
Jun 14, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A solenoid plunger for use in solenoid driven multi-line embossing systems is constructed of magnetic steel laminations that are attached to a center block which is machined to mount a solenoid shaft and anti-rotate pins. The laminations are attached to the center block with screws and vacuum epoxy glued for a very high cycle life. The laminated steel construction dramatically reduces eddy currents, which allows the magnetic field to rise and fall much more quickly than a conventional steel plunger. It also increases the magnetic force in the solenoid. This reduction in solenoid plunger eddy currents and increase of magnetic force in the solenoid structure itself operates to increase embosser throughput. The laminated steel construction further reduces embosser solenoid heating which also contributes to improved embossing control.
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