Material volume compensation assembly for a mold tool
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United States of America Patent
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Aug 22, 2006
Grant Date -
Feb 5, 2004
app pub date -
Jul 30, 2003
filing date -
Jul 31, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A carrier assembly controls movement of a movable member within a mold tool to first receive a quantity of molten material, and then displace that molten material back into a mold cavity during solidification of a molded article. The moveable member moves relative to the surface of the mold cavity to compensate for local volume changes in a molded part that occur during solidification to substantially eliminate depressions and sink marks on an outer surface of a plastic injection molded part.
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