Abstract: A cylindrical winding body is formed by winding continuous fibers impregnated with a first thermosetting resin in a circumferential direction, and the first thermosetting resin in the winding body is thermally cured. A pair of dome members is joined to both end portions of the cylinder member. A fiber bundle impregnated with a second thermosetting resin is helically wound around the joined member over the dome members, and the second thermosetting resin in the wound fiber bundle is thermally cured. A thermosetting resin containing a main agent and a granular solid curing agent is used as the first thermosetting resin, the main agent including a resin precursor and the solid curing agent chemically bonding molecules of the resin precursor together.

Abstract: The assembling step is a step of preparing an assembly. The setting step is a step of setting a plurality of holder installation areas along an outer peripheral edge of the peripheral wall. The determining step is a step of determining a first area in which the slit and the peripheral wall are not adjacent to each other in the first area and a second area in which the slit and the peripheral wall are adjacent to each other. The installation step is a step of providing a holder in the first area without providing the holder in the second area.

Abstract: A forming device, system, and method for continuous forming of a semi-finished fiber product. The semi-finished fiber product is supported flatly from a first side and is at least locally restricted in its freedom of movement, for example pressed on and/or guided, on another side opposite the first side. The further restriction occurs in relation to a guiding area at at least one constant location or region past which the semi-finished fiber product is guided. Shaping tools and guiding areas defined thereby are used for support, and hold-down devices and their contact surfaces are used for further restriction. The further restriction is carried out transversely to a feed motion direction of the semi-finished fiber product through the forming device. The further restriction and the flat guidance serve to reduce formation of undulations and folds.

Abstract: A method for manufacturing a composite pressurized-fluid vessel including winding a first polyolefin resin-based tape thereby forming a first layer of the vessel, depositing an intermediate second layer on the first layer, consisting of a material having variable permeability properties depending on the temperature and permeability below a pre-determined temperature threshold and non-permeability above the temperature threshold, winding a second resin-based tape on the intermediate second layer thereby forming a third layer, and cooling the intermediate second layer to a temperature below the temperature threshold while the first and third layers are each kept at a temperature above the melting temperature of their resin. Wherein the tape forming the third layer is based on a different resin from the first layer and during the step of depositing the intermediate second layer.

Abstract: Advanced single vacuum bag (ASVB) fabrication methods and assemblies are provided to manufacture and repair polymer composites whereby a rigid check plate is mounted over an uncured laminate by a thermally collapsible check plate stand. The check plate stand thereby maintains a gap between the check plate and the uncured laminate during first stage processing conditions, yet is capable of thermally collapsing during subsequent second stage processing conditions to thereby allow the check plate to fall into compressive contact with the uncured laminate After the check plate collapses onto the uncured laminate, the compressive force of the check plate will be transferred to the laminate to consolidate the laminate as desired and thereby form an at least partially cured polymer composite structure of high quality.

Abstract: The present disclosure provides a high-efficiency filament helical winding device, which includes a frame body and a plurality of multi-filar guides. The frame body is provided with a through-hole, the plurality of multi-filar guides distributed in a circumference along a center of the through-hole are rotationally connected to the frame body and filament is extended out from each multi-filar guide in the plurality of multi-filar guides, and the frame body is provided with a first driving mechanism that drives each multi-filar guide to rotate.

Abstract: A seam tape applicator for applying self-adhesive seam tapes to the junctions of dimpled waterproofing membranes, wherein the dimpled waterproofing membranes comprise dimpled surfaces, the seam tape applicator comprising: a body; a roller which is rotatably mounted to the body; and a handle which is attached to the body; wherein the roller comprises a roller surface which comprises surface features which complement the dimpled surfaces of the dimpled waterproofing membranes.

Abstract: A three-dimensional component is produced in a simplified molding operation. Expandable substrates, which are referred to as blanks, are created by compressing thermobonded nonwovens after heating the binder material above its melting temperature, and then cooling the compressed nonwovens so that the binder material hardens and holds the fibers of the nonwoven together in a compressed configuration with stored kinetic energy. Boards can be formed by laminating two or more blanks together and/or by laminating the blanks with other materials, including non-expendable materials. A mold for the component to be manufactured can be partially filled with a number of boards (or blanks) in a stacked, vertically, adjacent or even random orientation. In addition, the boards or blanks may be cut to create desired shapes of parts that can be placed in the mold.

Abstract: A controlled shear vacuum forming method that includes forming a three-dimensional (3D) structure from a preform material on a molding tool using restraints during vacuuming to prevent wrinkling. The restraints are withdrawn during vacuuming to allowing the preform material to come into contact with the sidewalls of the molding tool in a gradual manner. Such forming method is particularly suitable for forming wing spars with bent sections and/or curved contours.

Abstract: A surface preparation method (200) for a composite material (104) having an original surface (110), the material (104) comprising fibres (104a) within a matrix (104b), comprises removing (204) a surface portion of the matrix (104b) by plasma ablation so as to reveal and activate (206) a new surface (120) with at least a portion of a plurality of the fibres (104a) exposed thereon, without creating a residual heat-affected zone.

Abstract: The forming apparatus comprises a forming device with a tubular element adapted to form continuous tow material into a continuous tubular rod. The forming device comprises a fluid compressor for generating pressurized fluid, the fluid compressor being in fluid connection with the tubular element to provide pressurized fluid to the continuous tubular rod to heat or cool the continuous tubular rod. The forming device further comprises several fluid conduits to provide pressurized fluid from the fluid compressor to several injection sites arranged along the transport path, wherein at least two fluid conduits of the several fluid conduits comprise a pressure control unit including a pressure sensor and a pressure influencer.

Abstract: Apparatus for producing bent multi-sided pultruded fibre reinforced plastic reinforcement bar for concrete (commonly known as FRP rebar) comprises multiple resin wetting stages to simultaneously resin impregnate multiple bundles of fibreglass rovings continuously drawn through the resin wetting stages, multiple spiral winding stages arranged to spiral wind warps around the multiple wet rovings, and multiple rotating multi-sided former frames for continuously winding thereon the multiple wet rovings and holding the multiple rovings while curing. A related method is also claimed.

Abstract: Methods of fabricating a multi-region U-shaped composite structure, the methods comprising the steps of laying up a first composite material on a first tool piece to form a first sidewall, laying up the second composite material on a second tool piece tool to form a second sidewall, re-orienting the first tool piece and the second tool piece to a consolidation orientation, laying up the third composite material to form a nose wall, and overlapping at least a portion of the third composite material with at least a portion of the first composite material and at least a portion of the second composite material.

Abstract: An absorbent core comprising substantially continuous zones of one or more high fluid distribution structures and discontinuous zones of fluid absorption structures surrounding the one or more high fluid distribution structures, wherein the one or more high fluid distribution structures are arranged to distribute fluid across the absorbent core at a speed that is faster than the speed of fluid distribution across the absorbent core by said discontinuous fluid absorption structures, and wherein said continuous zones extend along a path that is substantially parallel to at least a portion of the perimeter of the core, said portion of the perimeter of the core comprising at least a portion of the sides of the core and one of the ends of the core.

Abstract: A tacking device may comprise: a handle; a main body extending from a first end of the handle to a second end of the handle; and a plurality of soldering irons, each soldering iron in the plurality of soldering irons extending from a first side of the main body through the main body to a second side of the main body, each soldering iron in the plurality of soldering irons including a piercing end disposed on the second side of the main body.

Abstract: A method for manufacturing absorbent sanitary products, comprising the steps of: forming a first and a second continuous elastic band, which are movable parallel to each other in a machine direction, fixing a plurality of absorbent panels between said first and second continuous elastic bands, arranged in a direction transverse to the machine direction, and spaced apart in said machine direction, wherein each of said elastic bands is formed by means of a method comprising the steps of: continuously feeding a plurality of tensioned elastic threads (30) in said machine direction, continuously feeding a pair of non-elastic webs arranged on opposite sides of said plurality of elastic threads, welding said pair of non-elastic webs to each other by means of a welding pattern comprising anchoring welds and/or containing and guiding welds.

Abstract: A composite barrel is laid up on a rotatable mandrel using laminators that apply composite material on the mandrel. The laminators are arranged on opposite sides of the mandrel and apply composite material to a first region of the mandrel while the mandrel is held stationary in a first rotational position. The mandrel is rotated to a second rotational position where it is held stationary as the laminators apply composite material to a second region of the mandrel to complete the layup. Plies in the first and second regions are spliced together during the layup process.

Abstract: A curable resin composition contains a curable resin that comprises at least one non-aromatic epoxy compound, at least one non-aromatic oxetane compound, or a mixture thereof, one or more curing agents selected from Lewis acid:Lewis base complexes, and a cure accelerating amount of one or more anhydride compounds. A method accelerating the cure of a curable resin composition, comprising adding a cure accelerating amount of one or more anhydride compounds to a curable resin composition comprising a curable resin that comprises at least one non-aromatic epoxy compound or non-aromatic oxetane compound and a curing agent that comprises one or more Lewis acid-base complexes. The composition and method are useful in making fiber reinforced resin matrix composite articles.

Abstract: In an example, a method is described. The method comprises placing a repair patch over a repair area of a structure, the repair patch comprising a repair-patch hole. The method also comprises sealing the repair patch and repair area with a vacuum bag having a seal ring around a periphery of the vacuum bag. The method also comprises evacuating, via an adhesive injection apparatus attached to the repair-patch hole and the seal ring of the vacuum bag, the repair area and an injection channel of the adhesive injection apparatus. The method also comprises forcing adhesive through the evacuated injection channel and into the evacuated repair area.

Abstract: The present disclosure provides a high-efficiency filament helical winding device, which includes a frame body and a plurality of multi-filar guides. The frame body is provided with a through-hole, the plurality of multi-filar guides distributed in a circumference along a center of the through-hole are rotationally connected to the frame body and filament is extended out from each multi-filar guide in the plurality of multi-filar guides, and the frame body is provided with a first driving mechanism that drives each multi-filar guide to rotate.