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Wrinkle reduction in uncured composite laminates

A wrinkle, transducer head technology, applied in the field of composite laminate manufacturing, can solve the problems of less effective, time-consuming removal of wrinkles, etc.

Active Publication Date: 2011-08-24
THE BOEING CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This existing technique for removing wrinkles is time consuming and may not be very effective in some cases

Method used

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  • Wrinkle reduction in uncured composite laminates
  • Wrinkle reduction in uncured composite laminates
  • Wrinkle reduction in uncured composite laminates

Examples

Experimental program
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Embodiment Construction

[0065] reference figure 1 The uncured composite laminate material 20 includes a plurality of sheets 22 of fiber-reinforced prepreg material, such as, but not limited to, reinforced carbon fibers supported in an epoxy resin matrix. The reinforcing fibers in the sheet 22 may be woven or knitted and may have any of a variety of fiber orientations. In some cases, some of the sheets 22 may include unidirectional fibers pre-impregnated with resin.

[0066] The laminate material 20 may include, for example, and is not limited to, a layup material 26 formed on a tool (not shown) for forming the laminate material 20 into a desired composite structure. During the layup process-where the sheet 22 is continuously stacked on a tool (not shown), one or more folds 24-also called buckles or buckling-can be on the sheet 22 Some or all of them. In some cases, the wrinkles 24 may only be present in the top sheet of the sheet of laminate 20.

[0067] The wrinkles 24 may be caused by, without limita...

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PUM

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Abstract

Wrinkles are removed from fiber reinforced resin plies of an uncured composite layup by subjecting the wrinkles to vibration and pressure.

Description

Technical field [0001] Generally speaking, the present disclosure relates to the manufacture of composite laminates, and more specifically to methods of reducing wrinkles in uncured laminates. Background technique [0002] In the process of laying up multiple sheets of uncured prepreg to form a composite laminate, sometimes wrinkles may be formed in one or more sheets. Wrinkles may be caused by, but not limited to, the higher friction between the reinforcing fibers caused by sheet deformation and / or adhesion of the uncured resin during the layup process. Wrinkles are undesirable because they can create voids or discontinuities in the cured laminate. [0003] In the past, the wrinkles produced in the uncured layup can be removed by heating and pressing the wrinkles and manually "sweeping out" the wrinkles by using a hand tool intended to smooth the wrinkles. This prior art technique for removing wrinkles is time consuming and may not be effective in some cases. [0004] Therefore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/24D01F11/16
CPCC08J5/24B29C70/30B29C35/0266B29C70/543B29C35/0261C08J5/243C08J5/248
Inventor J·C·古兹曼D·A·麦克卡威尔D·M·罗特尔T·J·沃什布恩K·S·威尔登D·C·达罗
Owner THE BOEING CO
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