Dual stage floating ring mold ejection
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United States of America Patent
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-
Aug 12, 2003
Grant Date -
Aug 15, 2002
app pub date -
Dec 8, 1999
filing date -
Dec 8, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
A plastic injection mold is disclosed for molding a cylindrical container having an enlarged annular rim and an annular flange spaced below the rim. The mold includes a core portion and a cavity portion which define therebetween the container to be molded. The core portion includes an inner, annular ejector ring defining a portion of the enlarged container rim. The core portion also includes an outer, annular ejector ring coaxially located adjacent to the inner ejector ring. Axially movable first push rods are connected to the inner ejector ring for moving both rings outwardly to partially eject a molded container upon opening of the mold. The core portion also includes cylinders and pistons connected to the outer ejector ring for separating and moving the outer ejector ring outwardly relative to the inner ejector ring to complete the ejection of the molded container from the mold core.
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