Loading patent…
AssigneeSociete Anonyme dite: Aerospatiale Societe Nationale Industrielle
InventorsJean-Louis Darrieux, Christian Picosson, Hugues Canfranc
Estimating the term…
Method for embodying hollow articles made of composite material including at least one access orifice via winding/laying down fibers on an expansible mandrel, the resulting articles and a recoverable and removable mandrel. The method includes placing preimpregnated fibers on an expansible, extractable mandrel having a longitudinal axis by at least one of winding and laying down the preimpregnated fibers on the mandrel, the placing of circumferential fibers of the preimpregnated fibers comprising placing the circumferential fibers at an angle to approach or reach 90.degree. with respect to the longitudinal axis and to form on the mandrel a sinuous line and/or plural, discontinuous elements, so as to enable the preimpregnated fibers to be expanded circumferentially during radial expansion of the mandrel; and expanding the mandrel inside a shaper while polymerizing the preimpregnated fibers.
A method for forming hollow articles made of composite material including at least one access orifice by at least one of winding and laying down fibers on an expansible mandrel, said method comprising:
A method for producing hollow articles made of composite material including at least one access orifice by at least one of winding and laying down fibers on an expansible mandrel, said method comprising:
The method according to claim 53, said method further comprising the step of determining characteristics of the undulations by calculation, such that once the mandrel has fully expanded, the undulations extending over the at least one of a whole turn of the mandrel and a fraction of a turn of the mandrel lose their sinuosity and form a helical path.
Dependencies are inferred from the claim text.