Injection molding utilizing base-wall-section flow guides
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United States of America Patent
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Jul 22, 2008
Grant Date -
Jun 21, 2007
app pub date -
Feb 12, 2007
filing date -
Jan 15, 2002
priority date (Note) -
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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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