Methods and apparatuses for injection molding walled structures
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United States of America Patent
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Aug 18, 2016
app pub date -
Oct 15, 2014
filing date -
Oct 15, 2014
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Abstract
A process is provided for making a walled structure using an injection molding apparatus. The apparatus has a molding space formed between a mold cavity and an inner core disposed within the mold cavity. The molding space defines a shape of the structure. The process includes injecting molding material into the molding space, moving or retaining a portion of a movable impression member protruding from the inner core within a portion of the molding space so as to create a recess within an inner wall of the structure, and retracting the impression member into the inner core such that the impression member is cleared from the molding space.
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