Collapsible core assemblies for injection molding devices

摘要

An injection molding assembly comprising a collapsible core assembly, an injection mold press comprising an internal cavity configured to receive the collapsible core assembly, and an actuator configured to insert the collapsible core assembly into the internal cavity of the mold press and method of using the same. The collapsible core assembly may comprise a static core member, a moveable core member coaxial to the static core member and moveable relative to the static core member, and a stripper plate moveable within the collapsible core assembly relative to the static core and configured to eject the molded part. The moveable core member may comprise an external engagement feature disposed at an end of the moveable core member. The external engagement feature may define a geometry operable to matingly engage an internal feature of a molded part supported on the moveable core member upon formation of the molded part.

主权项

1. A collapsible core assembly comprising:
a first retainer plate; a second retainer plate wherein the first and second retainer plates are simultaneously and independently movable; a static core member disposed through the first retainer plate and second retainer plate; a plurality of first extendable members, wherein each one of the plurality of first extendable members is coaxially disposed about the static core member, is pivotally connected to and movable with the first retainer plate and comprises an external engagement feature disposed at a distal end of each first extendable member that is constructed to matingly engage an internal feature of a molded part; a plurality of second extendable members, wherein each one of the plurality of second extendable members is coaxially disposed about the static core member, is pivotally connected to and movable with the second retainer plate and comprises an external engagement feature disposed at a distal end of each second extendable member that is constructed to matingly engage an internal feature of the molded part.