A reinforced composite structure that includes multiple regions of different geometric configurations connected together by a transition region. The reinforced composite structure includes reinforcement fibers on at least a portion of the transition region.

FIG. 2 shows a microperforated panel absorber 22 comprising: a microperforated facing 24; a non-perforated facing 26; and a cellular core structure 28 therebetween; the core structure 28 provides a number of primary cells 33 and a number of secondary cells 37; the secondary cells 37 each provide a reduced cell depth in comparison to the primary cells 33. FIG. 9 shows that the number of the primary cells 33 and the number of the secondary cells 37 ensures that sound absorption at frequencies up to and including the peak frequency is substantially maintained and that the sound absorption at frequencies higher than peak frequency is substantially increased relative to a comparable panel absorber in which the secondary cells are effectively replaced by primary cells.

A catalytic support for catalysis processes including a main body, at least one conduit made in said main body, said conduit having an inlet portion made on a first surface of said main body and an outlet portion made on a second surface of said main body, said first surface being opposite said second surface said main body includes a plurality of layers at least partially superposed and mutually adherent, said layers forming a plurality of recesses at the intersections and superposition of said layers, said recesses being configured to house particles of at least one catalyst element.

A method for manufacturing a panel including a plurality of partitions defining cells covered by at least one skin, the skin being formed by draping fibrous structures impregnated with a thermoplastic material on the upper edges of the partitions by automatic placement of fibers, the upper edges of the partitions and the fibrous structures being joined together with the aid of a localized heating device at the moment they are placed in contact, the method wherein the fibrous structures are draped with a draping tension on the interface between each edge of a partition and the deposited fibrous structure applying a shear stress of between 50% and 80% of the maximum shear stress before rupture of the interface.

A manufacturing system to form a honeycomb core and a method of forming the same includes a sheet of fibrous material is fed into a perforation assembly. The sheet of fibrous material is perforated via the perforation assembly to form holes through the sheet of fibrous material. The sheet of fibrous material is cut to form layers. The layers are stacked on top of each other such that the holes of the layers align with each other and strips of adhesive bond the respective layers together to form a perforated stack. A coating is applied to the sheet of fibrous material at the holes. The perforated stack is expanded to form a honeycomb panel. The honeycomb panel is dipped in a solution, and the coating repels the solution. The solution adheres to the honeycomb panel except at the holes where the coating is applied to form the honeycomb core.

A method for manufacturing a sound attenuating panel uses an alveolar-core structure including a first edge and a second edge separated by alveolar cells, the alveolar cells including walls extending from the first and second edges and defining a primary conduit for the circulation of a sound wave that is to be attenuated. The method includes covering the first edge or the second edge of the alveolar-core structure with a compartmentation wall; deforming the compartmentation wall to define at least one secondary conduit for the circulation of a sound wave that is to be attenuated, the secondary conduit extending at least partially within said primary conduit; and creating an opening in the compartmentation wall to permit communication between the primary and secondary conduits.

The present invention is directed to a 3D printed mold for creating three dimensional pulp products from a fibrous pulp slurry. Transverse filaments are integrated into an infill structure with an open-cell pattern. The transverse filaments form channels through the interior matrix of the mold. The open cell infill pattern and channels allow for the movement of vacuumed materials through the interior matrix of the 3D printed mold when vacuum pressure is applied. The product surface of the mold comprises an array of beads formed from the over-extrusion of melted material at the ends of the transverse filaments. The beaded array narrows the opening of the channels created by the transverse filaments, preventing the fibers from entering the matrix of the mold and clogging the flow of materials. This causes the fibers to aggregate on the product surface of the mold, forming the three dimensional pulp product.

A gripper for gripping a honeycomb-shaped part and depositing the part on a target surface includes gripping elements mounted on a support, each of the gripping elements being configured to be inserted into an internal cell of the honeycomb-shaped part. The gripping elements include a gripping surface that is laterally moveable relative to the support so as to come into contact with a side wall element of the internal cell.

A method for manufacturing a panel including a plurality of partitions defining cells covered by at least one skin, the skin being formed by draping fibrous structures impregnated with a thermoplastic material on the upper edges of the partitions by automatic placement of fibers, the upper edges of the partitions and the fibrous structures being joined together with the aid of a localized heating device at the moment they are placed in contact, the method wherein the fibrous structures are draped with a draping tension on the interface between each edge of a partition and the deposited fibrous structure applying a shear stress of between 50% and 80% of the maximum shear stress before rupture of the interface.

A tool for curing and bonding a honeycomb stack with void filler. The tool has a first tool piece with a cavity for receiving layers of unfilled honeycomb material and a second tool piece with a cavity for receiving at least one layer of void-filled honeycomb. The tool also has a compression seal arrangement that creates gas-tight seals between the first tool piece, second tool piece, and a barrier layer positioned between them, with a further seal covering the cavity of the first tool piece to form a gas-tight sealed volume including the first cavity, a pressure plate to cover the cavity of the second tool piece to apply pressure to the void-filled honeycomb, with a further seal to cover the pressure plate to form a gas-tight sealed volume including the second cavity.