Out-of-mold inspection of fibrous preform
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United States of America Patent
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Jun 14, 2005
Grant Date -
Dec 30, 2004
app pub date -
May 26, 2004
filing date -
Jul 3, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A fibrous preform such as a braided or stamped fibrous is inspected for a defect prior to placing the preform in a molding cavity by flowing gas through regions of the preform while it is located outside the molding cavity, measuring gas pressure at the regions, and determining deviations in measured gas parameter among the regions. The deviations of the gas parameter for a particular preform are compared to background data that includes deviations of the gas parameter determined for previously tested performs such that a relatively large deviation for a particular preform is considered to identify that preform as a defective preform as opposed to an acceptable preform.
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