Abstract: Provided is a bushing for manufacturing a three-dimensional composite preform using a tow made of a fiber reinforced polymer. The bushing includes a base plate in which one or more through-holes are formed, and a plurality of spools spaced apart from each other on the base plate. A flat top is formed at an end portion of the spools, and grooves are formed on outer surfaces of the plurality of spools in a circumferential direction thereof.

Abstract: A mold for a centrifugal impeller for a turbomachine is provided. The mold comprises at least one annular insert, wherein the annular insert comprises a plurality of aerodynamic vane inserts configured to reproduce an annular assembly of aerodynamic vanes of a finished centrifugal impeller.

Abstract: A hollow wall composite tube for improving performance in sports shafts and lightweight structural members is disclosed that includes: a constituent tube, for forming the wall, that comprises: a flexible core component, for providing an adjustable shape on which to wind or braid filaments or fabric; and an adjustable shape hollow structure, for reducing weight, providing a path for the core to be evacuated, tightly conformed to the core, and tow, braid filaments or fabric, for providing a reinforcing fiber matrix for saturation with epoxy, spirally wrapped, applied or braided on the constituent tube. Methods of producing contemplated composite tubes are also disclosed.

Abstract: A fiber application tool for a fiber application process designed, in particular, as an AFP, has a fiber contact surface area, which has a fiber contact surface for applying and/or pressing the fibers onto a work surface. The tool further includes an activation device for activating an adhesive, matrix, resin, or binder material provided at the fibers by means of an activation radiation so that the fibers are tacked onto the work surface. The fiber contact surface area for the activation radiation may be transparent and that the activation device may be designed so to guide and/or deliver the activation radiation through the transparent fiber contact surface area to the fibers to be pressed by the fiber contact surface.

Abstract: A perforated composite panel comprises a substrate and an applied layer, the substrate having a first surface and an opposite second surface. A method of forming the perforated composite panel comprises the steps of: i. cutting a plurality of first holes in the substrate; ii. positioning the applied layer against the substrate such that a surface of the applied layer overlays the first surface of the substrate to thereby form the composite panel; iii. locating the composite panel in a fixture, the fixture having one or more datum features; iv. determining the location and axis direction for each of the first holes in the substrate, relative to the or each datum feature; and v. cutting a plurality of second holes in the applied layer, each of the plurality of second holes being coincident and coaxial with a corresponding one of the plurality of first holes.

Abstract: A personal-care applicator comprising at least one stem having a longitudinal axis, a proximal end including a handle, and a distal end opposite to the proximal end, and at least a first plurality of bristles ultrasonically welded to the stem and outwardly extending therefrom according to a first pre-determined pattern, wherein the elongated stem and the at least first plurality of bristles comprise ultrasonically compatible materials, and wherein the bristles are ultrasonically bonded to the stem through a direct ultrasonic bond between a surface of the stem and a lengthwise portion of each of the bristles.

Abstract: A method for making a macro-scale carbon nanotube tube structure includes the following steps. A linear structure and a carbon nanotube structure are provided. The carbon nanotube structure includes at least one carbon nanotube film or at least one carbon nanotube wire. The carbon nanotube structure is wrapped around the linear structure to form a carbon nanotube composite structure. The linear structure is removed from the carbon nanotube composite structure, thereby forming the macro-scale carbon nanotube tube structure.

Abstract: A dome connector for a flywheel rim to shaft attachment is provided. The dome connector includes a helically wound composite band that extends from a first port to a second port. The helically wound composite band has a helical angle in relation to a line perpendicular to a center of axis of the dome connector. The helical angle is selected to at least in part achieve a desired stiffness in the dome connector.

Abstract: A catheter includes a balloon and a shaft having a coaxial portion including an outer tubular member having a bore, a transition neck, an access fitting adjacent the proximate end of the catheter shaft for directing a guidewire into the catheter shaft, an inflation port, a guidewire tubular member disposed coaxially in the outer tubular member, the outer tubular member and guidewire tubular member defining a first, annular inflation/deflation lumen fluid communication with the inflation port, at least one second inflation/deflation lumen separate from and non-coaxial with the guidewire tubular member and having a cross-sectional area less than the cross-sectional area of the first inflation/deflation lumen and opening at a proximate end into the first inflation/deflation lumen and at the distal end of the transition neck.

Abstract: The invention relates to a geodesic radome comprising shaped panels containing a consolidated plurality of plies, the plies comprising polyolefin tapes, wherein the shaped panels have a compressive strength of between 10 MPa and 100 MPa, an interlaminar shear strength of between 3 MPa and 75 MPa and a thermal expansion of between 1e?6 1/K and 50e?6 1/K.

Abstract: A method in which a fiber material is laid on a mold surface resembling a negative image of a fiber reinforced structure to be produced. Layering the fiber material on the mold surface includes laying rovings of the fiber material on the mold surface or on a fiber material already laid on the mold surface and applying an low pressure to a space between the rovings and the mold surface.

Abstract: A method of manufacturing composite material parts is provided. The method includes tape laying by means of fiber placement on the outer surface of a tape laying tool, such that at least one laminate with a geometry different from the end geometry of the part is obtained and forming the at least one laminate obtained in tape laying by means of a forming tool, such that the laminate acquires the end geometry of the part. The method also includes curing the at least one part.

Abstract: Methods of assembling a stiffened composite structure include loading a stiffener onto an inner mold line layup mandrel; positioning a filler structure on an upper side of a filler location tool; following the loading and the positioning, locating, with the filler location tool, the filler structure within the stiffener cavity of the stiffener; repeating the loading, the positioning, and the locating to load a plurality of stiffeners and filler structures; and following the repeating, affixing a skin segment over the plurality of filler structures and to the plurality of stiffeners to form at least a portion of the stiffened composite structure. Systems for assembling stiffened composite structures include a supply of stiffeners; a supply of filler structures; an inner mold line layup mandrel; and a filler location tool configured to locate a filler structure within the stiffener cavity of a stiffener that is loaded onto the mandrel.

Abstract: Methods of and systems for assembling stiffened composite structures are disclosed. Some methods include loading a stiffener onto an inner mold line layup mandrel and then loading a filler structure within the stiffener cavity of the stiffener. Some methods include loading, with a loading tool, a stiffener charge and a filler structure onto an inner mold line layup mandrel so the respective stiffener charge conforms to a stiffener form of the inner mold line layup mandrel to form a stiffener. Some methods include loading, with a loading tool, a stiffener and a filler structure onto an inner mold line layup mandrel.

Abstract: A plant for manufacturing a rigid pipe for drawing up deep water within an offshore platform includes a floating platform on which a continuous production device is installed in the vertical axis of the pipe, and including: a first stage of winding webs of fibers impregnated with resin around a winding roll for the partial crosslinking thereof, a second stage of complete crosslinking of the resin, a third stage of mounting functional members on the pipe, a fourth stage of inspecting the pipe thus manufactured, and a fifth stage of guiding the pipe.

Abstract: A cylindrical carbon fiber arrow shaft formed with an exterior surface having single or multiple outside diameters and formed with an axial bore having multiple interior diameters. In a preferred embodiment, the exterior surface of the arrow shaft has an increased external diameter at the nock end and tapers to a smaller external diameter at the tip end. The axial bore has an internal diameter at the nock end corresponding to standard arrows having external diameters of 0.295 inches and tapers to a smaller internal diameter at the tip end. Modifying the length, diameter, and wall thickness of the arrow shaft varies the stiffness of the arrow shaft along the length and shifts the center of gravity along the length of the arrow shaft and as well. Utilizing standard internal diameters, nock and tips may be attached without spacers or inserts, thereby decreasing weight of the arrow significantly.

Abstract: The embodiments are directed to a method and apparatus for preferably producing a two layer off-axis composite prepreg material in tape form that has fiber direction at angles such as plus or minus five degrees to the longitudinal direction of the backing paper. The use of such off-axis prepreg composite material tape is primarily for fabricating high length-to-width ration parts such as composite wing stringers or spars for aircraft.

Abstract: The present invention relates to a high-pressure tank made from fiber-reinforced plastic for, in particular, gaseous media, wherein, on its inner wall, the tank is equipped completely or partially with a substantially permeation-tight foil made of metal, wherein the metal has a high elastic range and a low thermal expansion coefficient, and the foil has a thickness of ?0.5 mm. The invention also relates to a method for manufacturing tanks of this type.

Abstract: A method for producing a fiber-reinforced plastic component is specified. In a first step, a positive arrangement is produced by fixing at least one reinforcement ready to be used on a positive core. In a second step, fibers are wound around the positive arrangement, concave regions of the positive arrangement that are formed by the reinforcement being spanned by the fibers. In a third step, the entire area of the fibers is pressed onto the positive arrangement in a negative mould. Finally, the component is cured in the negative mould following the introduction of a cross-linking plastic.

Abstract: A method of forming a homogenous composite pipe of unspecified length from strips of fiber reinforced thermoplastic material is disclosed. A mandrel is arranged stationary in a process direction to extend freely from a first supported end to a second end. A slip-sheath is applied about the mandrel. The thermoplastic material strips are wound about the slip-sheath. A section of the thermoplastic material strip winding is consolidated. The slip-sheath is formed from tape material which is applied longitudinally onto the mandrel surface. The slip-sheath is connected to a puller arranged downstream of the mandrel in the process direction. Consolidated pipe sections are pulled off from the second end of the mandrel in synchronization with the winding and consolidation. An assembly for carrying out the method.

Abstract: A multilayer pipeline (1) which includes at least: an inner fluid-tight ply (11) which consists of a first thermoplastic polymer material; an inner fibre-reinforced thermoplastic polymer ply (14) which includes a wrapped fibre-reinforcement and which surrounds the inner fluid-tight ply; a first intermediate ply (13) which consists of a second thermoplastic polymer material; an outer fibre- reinforced thermoplastic polymer ply (12) which includes a wrapped fibre reinforcement, wherein at least one of the inner fibre-reinforced thermoplastic polymer ply (14) and the outer fibre-reinforced thermoplastic polymer ply (12) includes at least one fibre-containing layer (14a-b, 14c-d; 12a-b, 12c-d) and one reinforcement-free layer (14c, 14f; 12c, 12f). A machine assembly (30) for producing the multilayer pipeline (1) and a method of producing the multilayer pipeline (1) are described as well.

Abstract: A method for creating a layup of reinforcing fibers comprises mounting a face sheet to a spindle of a mandrel tool support, the face sheet having a layup surface for the reinforcing fibers, and counterbalancing the mounted face sheet for stiffness and center of balance.

Abstract: The present invention discloses one or more embodiments of a mobile device capable of automatic enablement of a rear-face data entry. In a preferred embodiment of the invention, the mobile device can automatically detect and determine that a rear-face data entry interface is either facing up or facing the user's line of sight, which prompts activation of the rear-face data interface for immediate enablement of data entry (e.g. typing). If the rear-face data entry interface is either facing down or away from the user's line of sight, the mobile device disables the rear-face data interface for data entry to minimize accidental and undesirable data entry via the rear-face data interface. The preferred embodiment of the invention also incorporates a primary frontal touch-screen display, a secondary rear touch-screen display, a QWERTY keyboard, and display elevation guards on both displays.

Abstract: A method is provided for producing a weight-reduced FRP cylinder which can attain high strength, and also such an FRP cylinder is provided. This FRP cylinder producing method, in which a plurality of prepregs formed by impregnating reinforced fibers with thermosetting resin sheets are wound into a cylinder and thermally cured to be formed as a plurality of FRP layers, includes a simultaneous multilayer winding process in which a torsional rigidity retaining prepreg and a buckling prevention prepreg are continuously wound a plurality of turns with being layered on each other when the plurality of prepregs are wound into a cylinder, wherein the torsional rigidity retaining prepreg includes a layer of fibers oblique to a cylindrical axis direction of the FRP cylinder, and wherein the buckling prevention prepreg includes a layer of fibers orthogonal to the cylindrical axis direction.

Abstract: A method of fabricating a composite vessel encompassing rapid manufacturing that is applicable to composite hydrogen and other gas storage tanks, both for high-pressure cylinders, as well as low-pressure conformal tanks. The process of fabrication includes using a liner, of metal or plastic materials, over which a braided or developed preform is wrapped. The dry fiber wrapped liner is placed in a mold and resin injected into the cavity formed between the liner and the mold outer walls. The liner is flooded with heated and/or cooled pressurized fluid thus enabling complete and independent process control from within the liner for both the resin injection and the cure phases. Fiber placement control is determined through combined biaxial and triaxial braid/preform design, and by wrapping at controlled tension onto the supporting liner. Fiber tension control is further enhanced by the methodology of mold loading whereby tensioning forces are enacted during actual load and close.

Abstract: A cylindrical carbon fiber arrow shaft formed with an increased external diameter of 0.380 inches. This arrow shaft is formed with an axial bore which has a first internal diameter throughout a substantial portion of the shaft length, and a second, smaller, internal diameter throughout the fletching end of the arrow. The second internal diameter corresponds to the internal diameter of standard arrows having external diameters of 0.295 inches. Using this standard internal diameter at the fletching-end of the arrow, standard nooks may be used without the need for any spacer or insert, thereby decreasing fletching-end weight significantly and providing for the proper and more desired location of the center of gravity forward on the arrow.

Abstract: Provided is a filament winding apparatus (1) which moves a liner (2) while rotating the liner (2) and winds a fiber bundle (FB) around the outside peripheral face (2a) of the liner (2), said fiber bundle (FB) being guided by a fiber-feeding guide (44) positioned around the trajectory of the liner (2). The filament winding apparatus has a resin-spraying nozzle (45) for spraying a resin onto the fiber bundle (FB) at a position before the fiber bundle is wound around the liner (2), and the resin-spraying nozzle (45) is disposed so as to spray the resin onto the downstream side of the rotation direction of the liner (2) relative to an imaginary line (VL1) defied by a straight line connecting the spray nozzle (45N) of the resin-spraying nozzle (45) with the rotation axis of the liner (2).

Abstract: Provided is a method capable of easily and inexpensively molding a flanged fiber-reinforced resin hollow part with a non-uniform cross-section and a bent portion with a sufficiently reduced weight and substantially uniform thickness. To this end, a hollow laminate (20) is formed by laminating reinforced fibers (21) and matrix resin (24) on the circumference of a coupled body of a preformed hollow resin core (10) and a second core (15). The second core (15) is pulled out from the hollow laminate (20) and a region of the hollow laminate (20), from the second core (15) was pulled out, is pressed into a flange-shaped portion (26). A pressurization bag (30) is inserted into the hollow resin core (10) and it is then disposed within a shaping mold (40). Heat is applied while at the same time applying pressure to the inside of the pressurization bag (30) in the hollow laminate (20) disposed within the shaping mold, whereby the resin and the reinforced fibers are combined, inclusive of the flange-shaped portion (26).

Abstract: A panel former is provided for producing a panel that is formed from polymer tubing for solar collectors, heat exchangers, and other devices. The panel former can receive the tubing and continuously wrap the tubing around a drum so that support members can be welded to the tubing. After the support members are welded to the tubing, the tubing can be cut along a line substantially parallel to the support members to remove the tubing from the panel former and to form the risers in a panel.

Abstract: An apparatus for the reeling up of fiber bundles, in particular of hollow fiber membrane bundles, and in particular for the manufacture of dialysis filters, includes a reel carrier rotatable around a main axis. The apparatus includes at least two reels which are rotatably supported on the reel carrier, with the axes of rotation of the reels being perpendicular to the main axis of the reel carrier. The apparatus can be used for the wrapping of a fiber bundle with a film, having a receiver of first and second side elements and a flexible channel fastened between them for the reception of the film and the fiber bundle. A drive is provided to move at least the first side element transversely to the channel, and at least one folding device movable transversely to the channel for the folding of the film around the fiber bundle.

Abstract: A system for applying composite fiber to a lay-up tool has a fixed creel for supplying fiber to the fiber placement dispensing head and a fixed arm having a first end attached to the creel and having a second end attached to the dispensing head. The dispensing head is fixed on the end of the arm. A robot having a first and second pivot axis and at least a first wrist supports the lay-up tool. The robot manipulates the tool for application of fiber from the head to the tool. Manipulating the tool instead of the dispensing head allows the path length for the fiber between the creel and head to be fixed in length and orientation during application of fiber to the tool.

Abstract: A tape laminating machine having a compaction roller lays up composite tape over a substrate having a convex radius. The compaction roller folds the tape as it moves over the convex radius, while simultaneously pivoting about a trailing edge of the tape to prevent the compaction roller from lifting off the tape laid just before the convex radius.

Abstract: A steerable kink resistant access device is provided having an elongated body and a steerable portion; methods for manufacturing the kink resistant device are also provided. The access sheath has an outside diameter sufficiently small so that it may be inserted into a body cavity or conduit. The access sheath typically has two internal lumen, a first lumen sized and configured as an access to a surgical site and a second lumen sized and configured to contain a tensioning device that, when acted upon, will deflect the steerable portion. The tensioning device may be directly or remotely attached to an actuation device that operates to control the tensioning and loosening of the tensioning device.

Abstract: A flexible mandrel 100 has a plurality of flexible elements 130 extending between two spaced flanges 110, 120. A means for adjusting the radial position of each of the flexible elements 130 along the length of the mandrel 100 between the flanges 130 enables the plurality of flexible elements 130 to be configured in a variety of symmetrical and asymmetrical forms. Conventional composite fiber or tape laying techniques may then be used to form one-piece, revolute, composite components. The flexible mandrel 100 can then be collapsed and withdrawn from the interior volume 202 of the formed component.

Abstract: A mandrel suitable for forming a hollow part from a heat curable material includes an (a) an elongate central member having a coefficient of expansion which is different than the coefficient of expansion of the cured heat curable material, (b) at least one lateral member disposed at a first location and projecting away from the outer surface of the central member, the lateral member being slidably attached to the central member, and (c) a rigid elongate strut member having a coefficient of expansion substantially similar to the coefficient of expansion of the cured heat curable material. The first end of the strut member is affixed to the lateral member, and the second end of the strut member is affixed spaced apart from the lateral member.

Abstract: A non-compliant fiber-reinforced medical balloon comprises a first fiber layer and a second fiber layer embedded in a continuous matrix of thermally-weldable polymer material defining a barrel wall, cone walls and neck walls. The fibers of the first fiber layer have a pattern of different lengths and are divisible into a first group and a second group based on length. The length of the fibers of the second group varies progressively in accordance to their proximity to the fibers of the first group; the fibers of the second group closest to the fibers of the first group being longer than the fibers of the second group further from the fibers of the first group. The fiber of the second fiber layer winds circumferentially around the longitudinal axis of the balloon substantially over the entire length of the balloon.

Abstract: A composite tie rod comprises an open lattice body formed of interlaced filaments held in a solid matrix. A pair of composite fittings bonded to the ends of the body rigidly connect rod ends with the body. The rod ends form attachment points on the tie rod.

Abstract: A composite reinforcing bar is formed by providing a reinforcing material supply of fiber strands ravings; a resin supply bath, and a puller for pulling the resin-impregnated reinforcing material through the resin bath. The material is wound on a helical holder, while the resin remains unset, rotated about its axis on a drive system so that the material is wrapped the holder which is indexed along it axis and removed when full for curing the resin on the holder while the body remains wrapped thereon. The bar is wrapped with the turns side by side and is then stretched out and held by longitudinal straight bars while the reinforcing structure so formed is embedded in a cast material.

Abstract: Apparatus and methods are provided for making one or more tubular components of medical catheters or other tubular bodies using a strip of polymer material including a length, a width, and a first surface including a lubricious or other coating or surface modification. The strip is directed adjacent an elongate mandrel, such as beading, such that the length of the strip extends along the mandrel and the coating is disposed towards the mandrel. The strip is rolled at least partially around the mandrel such that the coating or surface modification is disposed inwardly towards the mandrel, and one or more strip-constrainment members are wrapped around the rolled strip. The directing, rolling, and wrapping steps may be substantially continuous to create one or more strip-mandrel-constrainment member subassemblies.

Abstract: An implantable prosthesis including a longitudinally compressed generally tubular substrate defining a longitudinal axis, a plurality of expandable segments disposed over the substrate and spaced apart along the longitudinal axis, and a graft member positioned over the segments. The graft member may include a lattice structure. Adjacent expandable segments may be connected by one or more filaments.

Abstract: A method for forming a composite structure, using a mandrel that is later removed from the composite structure, involves production of a mandrel by depositing a particulate mixture, including an aggregate and a binder, into a mold and removing the mandrel from the mold. The mandrel may be treated while still in the mold by heating, curing with an agent, microwave energy, or by some combination thereof. Once finished, the mandrel can be used in manufacturing polymer and/or composite components. The mandrel can also include materials that can be easily removed from the finished composite structure by water, shakeout, chemically dissolving, or by some combination thereof.

Abstract: A method for manufacturing complex hollow composite parts with at least one internal structure formed in situ by laying laminated layers around a removable mandrel assembled inside the part's inner cavity. The inner mandrel is made up of two jig plate assemblies aligned in a parallel manner and space apart where the internal structure is to manufactured. Each jig plate assembly is made up of at least three jig plates stacked in an edge-to-edge manner Located on opposite sides of each jig plate assembly is an elastic envelope filled with spherical objects. When evacuated, the envelope collapses and relaxes and composite material may then laid up inside the inner cavity and around the envelopes. When exposed to a heat, the envelopes expand and in situ and form internal structures inside surface of the cavity. Each envelope and each jig plate assemblies can be easily dissembled and reused.

Abstract: A bat is created using efficient and automated techniques to apply layers of composite materials onto a mandrel. The system includes a plurality of rotating wrapping mechanisms binding stages. Each wrapping mechanism rotates along a central axis while a mandrel is driven through the axis. The rotational motion allows each wrapping mechanism to wrap one or more material strips along the outer surface of the mandrel. Between each wrapping layer, a binding material such as fusible thread may be applied to fuse wrapping layers together. The wrapping may be performed for the bat barrel and bat handle. Each mandrel may form two bats, and multiple mandrels can be connected together to maximize wrapping efficiency. The wrapped mandrels are separated into bat units, a resin transfer molding is performed, and the bats are completed.

Abstract: A self-sealing vascular graft with kink resistance is described. The vascular graft includes a substrate that can be ePTFE, having a self-sealing region that may include several layers of material. The central section of the vascular graft may be constructed differently from surrounding self-sealing regions, in order to provide kink resistance following the clamping of the graft. Also described is a graft with a flared cuff attached to one or both ends, the attachment or transition region including reinforcement beading.

Abstract: The object of the invention is a process for production of a reinforcement (10) for composite material comprising at least two layers (12, 14) intended to be embedded in a polymer matrix, characterized in that at least one (14) of the layers is comprised of continuous filaments (16) in one main direction F and in that these filaments are positioned with variable spacing along this main direction F.

Abstract: Method for producing a fibrous product comprising: passing a texturized yarn (10) through a first passage (12) having a first outlet (14); projecting the texturized yarn (10) from the first outlet (14), inside a chamber (20), so as to fill the chamber (20) with the texturized yarn (10), thereby forming a first segment (31) of the fibrous product; moving the first segment (31) away from the first outlet (14); and forming a second segment (32) of the fibrous product in place of the first segment (31) and contiguously to the first segment (31), as many segments as necessary being contiguously formed by repeating the above steps. Apparatus for implementing the method.

Abstract: A winding machine for winding a fiber texture on an impregnation mandrel, the winding machine including: a takeup mandrel for storing a fiber texture, the takeup mandrel having an axis of rotation; an impregnation mandrel for having superposed layers of the fiber texture stored on the takeup mandrel wound thereon, the impregnation mandrel having an axis of rotation that is substantially parallel to the axis of rotation of the takeup mandrel; at least one electric motor for driving the mandrels in rotation about their respective axes of rotation; and a control unit for controlling the at least one electric motor for driving the mandrels in rotation.

Abstract: This invention provides a method for molding a continuous fiber prepreg part whereby a continuous fiber prepreg part comprising thermoplastic prepreg tape can be molded in a shape that allows the exhibition of desired physical properties without the sacrifice of productivity. Prepreg tape 11 is wound around a plurality of rods 21 so as to form a rolled continuous fiber prepreg part 12, slack is removed from the prepreg tape 11 by shifting the plurality of rods 21 in opposite directions so as to generate tension in the continuous fiber prepreg part 12, the continuous fiber prepreg part 12 is pressed with a press jig 41 so as to mold the prepreg part into the final shape, and the continuous fiber prepreg part 12 is cured by heating and cooling after heating.

Abstract: A method for making a carbon nanotube composite hollow structure is provided. The method includes: passing a linear structure through a hollow rotating shaft and fixing the linear structure on the collecting unit; drawing a carbon nanotube structure from a carbon nanotube array loaded on the face plate, and adhering one end of the carbon nanotube structure to part of the linear structure between the wrapping unit and the collecting unit; forming a first carbon nanotube composite wire collected by the collecting unit by rotating the face plate and pulling the linear structure along a fixed direction such that the carbon nanotube structure wraps around the linear structure; forming a second carbon nanotube composite structure by applying a polymer liquid to the first carbon nanotube composite structure; and forming the carbon nanotube composite hollow structure by removing the linear structure from the second carbon nanotube composite structure.

Abstract: Method to make an arm in a composite material for articulated or telescopic modular structures for the distribution of concrete, which comprises a first step in which one or more layers of fiber (16, 25) are distributed on the external surface (17) of a male-type mold (11) having a cross section defined by at least a substantially flat wall. The section of the male mold (11) reduces, in at least one of its sizes, passing from one of its ends to the other. The fibers (16) may or may not be pre-impregnated with a resinous matrix. The method also comprises a second step in which the male mold (11) is ejected from the product thus obtained, a possible heat treatment being provided, for example in autoclave, before the extraction of the product.