Apparatus for forming contoured composite laminates
First Claim
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1. An apparatus for forming a composite prepreg structure, comprising:
- a mandrel having a contoured surface on which a prepreg ply may be placed;
a forming head configured to sweep the prepreg ply onto a first portion of the contoured surface of the mandrel, wherein the forming head includes a tube having a plurality of slots therein, and a plurality of fingers defined between the slots, wherein the fingers are configured to slidably engage and press the prepreg ply against the first portion of the contoured surface of the mandrel; and
a flexible diaphragm covering the prepreg ply and configured to vacuum form the prepreg ply onto a second portion of contoured surface of the mandrel.
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Abstract
A composite prepreg laminate such as a hat type-stringer is formed on a contoured mandrel using a combination of mechanical sweeping and vacuum forming.
61 Citations
34 Claims
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1. An apparatus for forming a composite prepreg structure, comprising:
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a mandrel having a contoured surface on which a prepreg ply may be placed; a forming head configured to sweep the prepreg ply onto a first portion of the contoured surface of the mandrel, wherein the forming head includes a tube having a plurality of slots therein, and a plurality of fingers defined between the slots, wherein the fingers are configured to slidably engage and press the prepreg ply against the first portion of the contoured surface of the mandrel; and a flexible diaphragm covering the prepreg ply and configured to vacuum form the prepreg ply onto a second portion of contoured surface of the mandrel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for forming a contoured composite laminate stringer having a hat cross-section and a pair of flanges, comprising:
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a contoured elongate mandrel on which at least one composite prepreg ply may be placed, the mandrel having a cap section, a pair of web sections and a pair of flange sections; and a plurality of former modules, each of the former modules including a forming head, wherein each of the forming heads includes a tube having a plurality of slots therein and forming fingers located between the slots configured to secure and sweep the prepreg ply onto the cap and web sections of the mandrel. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. An apparatus for forming a contoured composite prepreg laminate, comprising:
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a contoured mandrel on which at least one composite prepreg ply may be formed; a plurality of former modules arranged side-by-side for respectively forming the prepreg ply on the mandrel, each of the former modules including a forming head associated with a section of the mandrel for forming the prepreg ply on the associated section of the mandrel, wherein each forming head includes a tube having a plurality of slots therein, and a plurality of fingers defined between the slots, wherein the fingers are configured to slidably engage and press the prepreg ply against the first portion of the contoured surface of the mandrel; and a mechanism for aligning each of the forming heads with the contour of the associated section of the mandrel. - View Dependent Claims (33, 34)
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Specification