Injection molding utilizing base-wall-section flow guides

Details Injection molding utilizing base-wall-section flow guides Injection molding utilizing base-wall-section flow guides

2007-02-12

2008-07-22

Heitbrink, Jill L (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Positioning of a mold part to form a cavity or controlling...

C264S328700, C264S328120, C425S150000, C425S577000

Reexamination Certificate

active

07402267

ABSTRACT:
During injection molding of a plastic product having a base wall and a sidewall, fluid plastic material is injected into a base-wall section of a mold cavity. The base-wall section of the mold cavity includes at least one flow guide that is defined by a first mold part, a second mold part, and a third mold part that is movable relative to the first and second mold parts to either decrease or increase the conduction of injected plastic material through the at least one flow guide. Conduction within the at-least-one flow guide is adjusted dynamically while the injected plastic material is being conducted into the sidewall section of the mold cavity by moving the movable third mold part in response to sensed variations in injection pressures in different portions of the sidewall section of the mold cavity.

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