Method for fabrication of perforated composite
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Sep 17, 2002
Grant Date -
N/A
app pub date -
Feb 1, 1996
filing date -
Feb 1, 1996
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A sheet of uncured polymer, which is preferably reinforced with multiple layers of fiber, is staged or partially cured to a state in which the sheet is rigid at room temperature. Multiple apertures are drilled into, and preferably through, the sheet. The apertures are for acoustic or laminar flow control, and include holes having diameters in the range of 0.025 to 0.120 inch. In the case in which the fabricated panels must conform to a particular shape, the perforated, partially cured panels are heated to a temperature at which the panel softens, and conformed to the desired surface. The partially cured, perforated sheets are then cured. In order to prevent closure of the drilled holes during the cure, the perforated panel is sandwiched between two layers of glass fabric and cured on an elastomeric tool surface which expands with increases in temperature, forcing the glass fabric to seal the holes during cure. Release coatings are used to aid panel/liner separation.
First Claim
Other Claims data not available