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 filament winding apparatus includes a control unit, a rotation mechanism that rotates a mandrel, a hoop winding head that performs hoop-winding, and a helical winding head that performs helical-winding. The hoop winding head includes bobbins that feed fiber bundles to the mandrel and a circulation mechanism that circulates the bobbins around the mandrel. The control unit controls the rotation and circulation mechanisms such that the mandrel is rotated and the bobbins are circulated in the same direction during helical-winding. It is not necessary to cut fiber bundles after hoop-winding, and wasted fiber is not fed during helical-winding, thereby increasing economy and productivity.
Abstract:
An object of the present invention is to provide a high-quality fiber reinforced resin member that enables a longitudinal yarn to be laid out, without slipping, around an outer periphery of a mandrel having at least a bent portion, thus allowing both the longitudinal yarn and a diagonal yarn to be evenly laid out, and a method of manufacturing the fiber reinforced resin member, as well as an apparatus manufacturing a fiber fabric for the fiber reinforced resin member. A fiber reinforced resin member 1 includes an elongate fiber fabric formed by braiding a plurality of longitudinal yarns Q, . . . extending in a longitudinal direction of the fiber fabric and a plurality of diagonal yarns P, . . . inclined at a predetermined angle to the longitudinal direction, the fiber fabric being impregnated with resin that is then hardened. The fiber reinforced resin member 1 has at least a bent portion 1″. The longitudinal yarns Q, . . . are spirally wound at the bent portion 1″, in a posture in which the longitudinal yarns are inclined at an angle of, for example, 10 to 15 degrees to the longitudinal direction.
Abstract:
A composite pipe including an internal liner and at least one external layer made of a fiber reinforced consolidated thermoplastic material. A heat-resistant material mechanically separates the liner from the at least one external thermoplastic layer. The heat-resistant material forms a non-bonding barrier that is non-bonded to at least one of liner and the adjacent at least one thermoplastic layer. A method and an assembly for producing the composite pipe.
Abstract:
A breathing circuit component includes an inlet, an outlet and an enclosing wall. The enclosing wall defines a gases passageway between the inlet and the outlet. At least a region of the enclosing wall is formed from a breathable material that allows the passage of water vapor without allowing the passage of liquid water or respiratory gases. The breathing circuit component may be the expiratory limb of a breathing circuit.
Abstract:
An arrangement for continuously making reinforced hose-shaped structures (1) having: a conveying unit for continuously driving a row of sequential cylindrical mandrels (5), which are coupled to each other, in a conveying direction (X) and for returning individual mandrels (5) to the manufacturing start; at least one extrusion unit (4) for applying a rubber or plastic layer (2) to the periphery of the mandrels (5); at least one unit for applying at least one reinforcement layer (3); a separating device (13) for cutting the reinforced hose-shaped structures (1) at the connecting location of mutually adjoining mandrels (5) and a strip-off device (14) for stripping off the cut reinforced hose-shaped structures (1) from the individual mandrels (5). The mandrels (5) are rigid and are coupled to each other in such a manner that, in each case, a peripherally-extending cutting zone (S) of a material, which is different to the mandrel (5), is provided between the abutting surfaces of mutually adjoining mandrels (5). The arrangement is so aligned that a vulcanization of the reinforced hose-shaped structures (1) takes place only at after the strip off.
Abstract:
The invention is concerned with a rod shaped constructional element comprising a core of foam material at least one first layer of fibers mounted on said core, said fibers extending in a direction parallel to the axis of said core at least one second layer of fibers mounted on said first layer, said second layer of fibers crossing each other at an angle to said axis; and at least one disc element disposed transversely in said core.
Abstract:
A structural component having a curved wall, such as an aircraft fuselage pipe, has a grid structure formed of box frames produced by winding tapes of fiber reinforced synthetic material, so-called prepregs, onto mold bodies. These mold bodies are then assembled on a mandrel for covering with a planking and curing whereby the tapes are bonded together to form stringers intersecting with ribs in a grid structure and whereby the planking is bonded to the grid structure. The ribs are reinforced by fiber reinforced belt segments of synthetic material inserted into gaps between adjacent short ends of the mold bodies, whereby these belt segments are bonded to the ribs during curing. The belt segments have a width corresponding to a multiple of the width of the stringers and hence protrude radially inwardly. Preferably, an edge reinforcing strip of fiber reinforced material is arranged alongside the radially inner edge of the belt segments. The mandrel carries support rings which are axially displaceable along the mandrel and which carry mold body support plates by radially adjustable members for placing the support plates into a plurality of different positions for assembling, curing and mold body removal.
Abstract:
An improved elongated blade or blade spar comprises successive low-pitch circumferentially wrapped convolutions of a synthetic resin impregnated tape having elongated cut glass and substantially parallel and equal length filaments wherein successive convolutions are overlapped approximately 50% and wherein the axis of the elongated strands lie at an angle of less than 30.degree. from the elongated spar axis. Preferably, resin impregnated filamentary strands are circumferentially wrapped around the mandrel substantially parallel with the direction of the tape wrap between selected tape layers. The improved blade spar mandrel wrapping apparatus includes a split ring support for the mandrel and through which the mandrel extends. The support ring halves may be separated, moved and rejoined during the mandrel wrapping process.
Abstract:
An improved elongated blade or blade spar comprises successive low-pitch circumferentially wrapped convolutions of a synthetic resin impregnated tape having elongated cut glass and substantially parallel and equal length filaments wherein successive convolutions are overlapped approximately 50% and wherein the axis of the elongated strands lie at an angle of less than 30.degree. from the elongated spar axis. Preferably, resin impregnated filamentary strands are circumferentially wrapped around the mandrel substantially parallel with the direction of the tape wrap between selected tape layers. The improved blade spar mandrel wrapping apparatus includes a split ring support for the mandrel and through which the mandrel extends. The support ring halves may be separated, moved and rejoined during the mandrel wrapping process.