Process and tools for manufacturing composite ring frames

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

Reexamination Certificate

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Details

C156S214000, C156S228000, C156S266000, C156S289000, C156S307300, C264S034000, C264S035000, C264S138000, C264S152000

Reexamination Certificate

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07544261

ABSTRACT:
The present invention relates to a process for manufacturing composite ring frames for aeronautical fuselages by means of the application of the RTM technology to two preforms with C- and L-shaped sections manufactured using two tools (21, 55) in the following steps: providing the material; hot-forming planar rectangular laminates (41); hot-forming laminates of right angle section (51) on one part of right angle section of the first tool (21), placing an elastic membrane (55) and applying a temperature and vacuum cycle; hot-forming the preforms into a C shape (11) and L shape (13) on a second curved tool (55) by deforming said laminates of right angle section (51) thereon, and applying a temperature and vacuum cycle. The invention also relates to said tools (21, 55).

REFERENCES:
patent: 5546880 (1996-08-01), Ronyak et al.
patent: 5648109 (1997-07-01), Gutowski et al.
patent: 6355133 (2002-03-01), Williams
patent: 6508909 (2003-01-01), Cerezo Pancorbo et al.
patent: 6735866 (2004-05-01), Nogueroles et al.
patent: 7056402 (2006-06-01), Koerwien et al.
patent: 2004/0074578 (2004-04-01), Dewing
patent: 1547756 (2005-06-01), None

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