Method of producing a fibrous layer for the manufacture of a preform of a composite part
First Claim
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1. A method of making a fiber ply for forming a preform of a composite part in the form of a body of revolution having a non-developable surface, the method comprising the steps of:
- defining an annular space with first and second canvases respectively defining an inner periphery and an outer periphery thereof;
placing fibers between the canvases by placing the fibers in the annular space in at least one direction and by holding said fibers on the canvases by stitching;
implementing circular connection stitching in the vicinity of the inner periphery of the annular space; and
cutting out the fiber ply as made in this way in the annular space in order to extract it from the canvases.
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Abstract
The invention provides a method of making a fiber ply for forming a preform of a composite part in the form of a body of revolution having a non-developable surface, the method being characterized in that it comprises the steps consisting in:
- defining an annular space (23) with first and second canvases (20, 21) respectively defining an inner periphery and an outer periphery thereof;
- placing fibers between the canvases (20, 21) by placing the fibers in the annular space in at least one direction and by holding said fibers on the canvases by stitching;
- implementing circular connection stitching in the vicinity of the inner periphery of the annular space (23); and
- cutting out the fiber ply as made in this way in the annular space (23) in order to extract it from the canvases.
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Citations
24 Claims
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1. A method of making a fiber ply for forming a preform of a composite part in the form of a body of revolution having a non-developable surface, the method comprising the steps of:
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defining an annular space with first and second canvases respectively defining an inner periphery and an outer periphery thereof; placing fibers between the canvases by placing the fibers in the annular space in at least one direction and by holding said fibers on the canvases by stitching; implementing circular connection stitching in the vicinity of the inner periphery of the annular space; and cutting out the fiber ply as made in this way in the annular space in order to extract it from the canvases. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of fabricating fiber reinforcement for a composite strength member of a flexible abutment, the method comprising forming a preform by
defining an annular space with first and second canvases respectively defining an inner periphery and an outer periphery thereof; -
placing fibers between the canvases by placing the fibers in the annular space in at least one direction and by holding said fibers on the canvases by stitching; implementing circular connection stitching in the vicinity of the inner periphery of the annular space; cutting out the fiber ply as made in this way in the annular space in order to extract it from the canvases to create a first fiber ply; and forming a second fiber ply by placing on the first fiber ply, while held in shape on a spherical tool, a ply of fibers that are oriented perpendicularly to the fibers of the first ply. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification