Apparatus for injection molding using active material elements
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United States of America Patent
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Nov 13, 2007
Grant Date -
Oct 27, 2005
app pub date -
Apr 23, 2004
filing date -
Apr 23, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Method and apparatus for compressing melt and/or compensating for melt shrinkage in an injection mold are provided. The apparatus includes a cavity mold portion adjacent a cavity plate, a core mold portion adjacent a core plate, a mold cavity formed between the mold portions, and at least one piezoceramic actuator disposed between either or both of the core plate and the core mold portion and the cavity plate and the cavity mold portion. A controller may be connected to the at least one piezoceramic actuator to activate it, thereby causing the mold cavity volume to decrease, compressing the melt.
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