Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Joachim Johannes Niewels0
Date of Patent
November 13, 2007
0Patent Application Number
108304360
Date Filed
April 23, 2004
0Patent Primary Examiner
Patent 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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