Societe Nationale Industrielle Et Aerospatiale

Aerospatiale Societe Nationale Industrielle

Societe Nationale Industrielle Aerospatiale

Societe Anonyme Dite: Aerospatiale Societe Nationale Industrielle

Aerospatiale Societe Nationale Ind.

Francois J Monget

Georges J Cahuzac

Gerard Mathieu

Michel Hee

The present invention relates to a method for producing a reinforcement for a composite component, said reinforcement including superposed plies of thread, according to which method:

Method and machine for producing a reinforcement for a composite

Method for laying filaments on a convex axisymmetric surface, especially a hemispherical surface, provided with a circular hole or a dead zone centered on the pole, wherein a regular set of points are defined on a reference circle of the surface, the filament being laid along a geodesic path from one first departure point to one first arrival point on the reference circle, the same laying process being reproduced for a second pair of departure and arrival points so as to lay a set of filaments (so-called a lap) and then the same laying process is repeated via successive shifts until each point of the reference circle is at the same time and solely a single departure and arrival point, so as to obtain a layer, and possibly restarting the process until the desired thickness is obtained.

Method for laying filaments on a convex axisymmetric surface

A method and weaving machine for weaving a thick reinforcing fabric comprising multiple noncleaving layers with a 2.5 D or 3 D type structure. The warp yarns successively move into a yarn joining comb, a calibrating comb and then into a dobby weaving unit, where the warp yarns on n superimposed laps are separated upstream of the calibrating comb, n being equal to (N- 1/2 ) and N being the number of layers of said reinforcement so as to have (N- 1/2 ) warp yarns moving into each tooth of the calibrating comb. Two adjacent yarns of a given tooth of the calibrating comb are threaded into the eyes of two heddles of the same row of two heddle frames of the dobby, so that the displacement planes of two adjacent yarns during formation of the shed form between them a sufficient angle so as to prevent the yarns from catching on one another.

Warp handling arrangement for weaving a multi-dimensional thick fabric

A composite reinforcement element comprising three superimposed and crossed even layers of threads and a continuous thread extending perpendicularly through the three superimposed even layers. The layers are impregnated with a binder and the binder is polymerized after impregnation. The superimposed and crossed even layers are initially maintained assembled, before the impregnation and the polymerization of the binder, by a conjugate action of gripping and friction of the three superposed and crossed even layers of threads on the continuous thread which extends therethrough. The continuous thread forms an internal surface of the composite reinforcement element which protrudes from the superimposed and crossed even layers of threads in the form of open loops which are interconnected on an external surface of the element.

Composite reinforcement elements woven in three dimensions

The machine comprises a frame (1, 2, 3, 4), a rotary mandrel (15) mounted on a horizontal shaft (14), a vertical arm (12) having a detachable work device (20) at the lower end of the arm, and means (M1, M2, M3) for shifting the arm (12) along three orthogonal axes (X, Y, Z).

Machine for manufacturing composite reinforcement elements woven in

A plurality of parallel layers of fibers are laid in two crossed directions on a disposable support mandrel, pins are temprorarily implanted in the mandrel (15) composed of foam material in regions of evolution of its shape and at points where it is desired to change the direction of the fiber, a continuous thread (33) is stretched out between the pins so as to form crossed superimposed layers, and a continuous fiber (50) is introduced by means of a needle (43) through the layers and forms successive open loops (53). The loops (53) are maintained by the elastic pressure exerted by the foam material and the gripping action of said layers. The fibers are impregnated with a binder and the binder is hardened and the mandrel is destroyed.

Process for manufacturing composite reinforcement elements woven in

The invention concerns the production of three-dimensional thread packages. Vertical rods (11) are maintained in a stationary arranged network by engagement through perforated plates (12,13). A thread (10) is deposited from above this network by a shuttle (9) in a sinuous path between upper end portions of the rods (11). The layers of thread thus formed in succession, supported by the perforated plate (12) which undergoes a descending movement, are compacted by a perforated plate (7) which is lowered upon the finishing of each layer. A lacing arrangement (35) replaces the rods (11) by threads after the thread laying phase.

Machine for producing complex objects by multidirectional deposition of

The invention concerns the production of three-dimensional thread packages. Vertical rods (11) are maintained in a stationary arranged network by engagement through perforated plates (12,13). A thread (10) is deposited from above this network by a shuttle (9) in a sinuous path between upper end portions of the rods (11). The layers of thread thus formed in succession, supported by the perforated plate (12) which undergoes a descending movement, are compacted by a perforated plate (7) which is lowered upon the finishing of each layer. A lacing arrangement (35) replaces the rods (11) by threads after the thread layer phase.

Growing community of inventors

Merignac, France

Francois J Monget