Collapsible core of a mold for forming internal features such as threads

摘要

A collapsible core of an injection mold includes relatively movable components arrayed about an imaginary centerline. When in an operational position for molding a new product, the movable components each define a separate segment of the exterior of the core, such as side by side segments of interior features such as a continuous set of threads to be formed in a product being molded. To move between operational and retracted positions, some core components are pivotally connected to a nest of the core, and others are translatably connected to the nest. When a newly molded product is ejected from the mold, ejection movement causes the pivotally connected core components to pivot to disengage the newly formed interior features, and causes the translatably connected components to translate to disengage the newly formed interior features.

主权项

1. A collapsible core assembly comprising first and second sets of thread forming components that cooperate when operationally positioned to form a set of continuously extending female threads within an interior of a product molded around a portion of the core assembly, and that retractively move after forming the threads to different locations where the components are disengaged from the newly formed threads.