Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1989-08-09
1991-12-17
Hoag, Willard
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
249 95, 425117, 425121, 425127, B29C 4514, B29C 3910
Patent
active
050733265
ABSTRACT:
Method and apparatus are disclosed for injection molding an article having at least one sub-surface portion. The apparatus includes an article mold having at least one cavity with a wedge-receiving aperture and a wedge insertable within the wedge-receiving aperture for receiving the sub-surface portion of the article. The wedge is movable between a wedged position, wherein the wedge is firmly seated within the wedge-receiving aperture and an unwedged position, wherein the wedge is movable with respect to the article mold to free the sub-surface portion of the article when ejecting the article from the cavity. The sub-surface portion of the article can include a part to be held within the cavity during injection molding, or an injection molded portion of the article forming a normally die locked portion of the article. The apparatus can also include a multi-piece mold cavity removably engageable within aligned apertures of a separable mold base. The multi-piece mold cavity includes tapered sidewalls for self aligning engagement with the sidewalls of the apertures in the mold base. The multi-piece mold cavity is assembled into a single unit at an assembly station prior to insertion into one of the mold base apertures at a molding station, and after injection molding, the multi-piece mold cavity is ejected from the mold base prior to disassembly and ejection of the molded article at a disassembly/article ejection station.
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Craves Roderick M.
Jacobson Mark J.
Korany Franklyn J.
Hoag Willard
Prism Design & Engineering, Inc.
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