Injection molding apparatus having a magnetic valve pin coupling
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United States of America Patent
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Nov 13, 2012
Grant Date -
Sep 6, 2012
app pub date -
Mar 1, 2011
filing date -
Mar 1, 2011
priority date (Note) -
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Abstract
An injection molding apparatus is disclosed having an actuated part that is movable in forward and rearward directions with a magnetic valve pin coupling attached thereto. A valve pin for opening and closing a mold gate is coupled to the magnetic valve pin coupling to be movable with the actuated part. When the actuated part is moved in an opening stroke direction and the valve pin experiences a stopping force, the magnetic valve pin coupling permits the valve pin to become decoupled from the actuated part to prevent continued movement of the valve pin with the actuated part.
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