摘要:
A method and apparatus for fabricating a short length carbon fiber preform with a through thickness reinforcement is disclosed herein. The starting media for fabricating a net shape (e.g., annular disc) may meet specific requirements including a sufficient fiber volume and a binding mechanism compatible with the needle-punching process.
摘要:
Provided is a flat fiber-reinforced plastic strand which is produced by curing a twisted resin-impregnated strand and has no disturbed fiber orientation, and a flat fiber-reinforced plastic strand sheet which is produced by using said flat fiber-reinforced plastic strands. According to a method of manufacturing the flat fiber-reinforced plastic strand 2, (a) a twisted resin-impregnated strand f2 in an uncured state, the strand including a plurality of reinforcing fibers f, is fed in a state of tension between a pair of heated steel belts 41A and 41B facing each other and making rotation movements; and (b) the resin-impregnated strand f2 is sandwiched and heated by the steel belts 41A and 41B, and pressurized from both sides of the strand f2 to form a cross section of the strand into a flat shape, and, with the shape being kept, a resin is cured and cooled.
摘要:
A device for producing a composite fiber material in the form of a fiber band impregnated with a polymer includes a transport device for supplying and for transporting a fiber band along a processing path. To preheat the raw fiber band to a processing temperature a preheating device is used. An application device is used for applying the melted polymer on the whole width onto the surface of the raw fiber band. At least one pressure shearing vibration application device is used to apply pressure to the raw fiber band perpendicular to the band plane after the application of the polymer, where the application of pressure is performed by at least one pressure stamp with the simultaneous shearing vibration of the pressure stamp by a vibration movement component (y) in the band plane and transversely to a band running direction. At least one tempering device is used to keep the raw fiber band within a processing temperature range. This results in a production method and a production device with a predefined impregnating quality at the lowest possible production cost.
摘要:
A material preparation device is provided. The material preparation device includes a bias-ply assembly, a feedstock assembly and an application head. The bias-ply assembly is configured to pass a bias-ply backing material along a first path. The feedstock assembly is configured to pass a feedstock along a second path that crosses the first path at a select angle. The feedstock includes resin pre-impregnated fiber reinforced material (pre-preg) having the fibers at a first orientation relative to an edge of the feedstock. The application head is configured to transfer the pre-preg from the feedstock to the bias-ply backing material at a location where the first path crosses the second path to form a bias-ply with the fibers of the pre-preg having a second different orientation relative to an edge of the formed bias-ply.
摘要:
A method and apparatus are used to pre-consolidate and de-bulk a thermoplastic composite ply stack prior to full consolidation and forming to the final part shape. Pre-consolidation and de-bulking is achieved by heating the ply stack to a temperature below the melting point of the thermoplastic in order to soften the plies, and then compress the ply stack.
摘要:
Methods of making a fiber-containing prepregs may include drawing unsized fibers from a batch of molten glass. The method may also include applying a sizing composition to the unsized fibers to form a plurality of sized fibers, where the sizing composition includes a first polymerization agent for polymerizing caprolactam. The method may further include weaving the plurality of sized fibers into a fabric. Another step may include melting a reactive resin composition to form a melted reactive resin composition, where the reactive resin composition may include caprolactam. The melted reactive resin composition may be applied to the fabric. The method may further include heating the fabric and the melted reactive resin composition to a polymerization temperature, where the caprolactam polymerizes to form a fiber-resin amalgam including a polyamide. Another step may be to form the fiber-resin amalgam into the fiber-containing prepreg.
摘要:
The present invention relates to thermoset resin fiber components, composite materials including thermoset resin fiber components, composite articles manufactured using such composite materials and methodologies for manufacturing same. The thermoset resin fiber components may include a single fiber of thermoset resin or a plurality of fibers commingled together. The properties and characteristics of the thermoset resin used are chosen according to the material to be produced therefrom. The thermoset fiber components may be woven into reinforcement fibers to form prepregs. Thermoplastic fibers may be commingled and co-woven with the thermoset fiber components.
摘要:
High tenacity, high elongation multi-filament polymeric tapes as well as ballistic resistant fabrics, composites and articles made therefrom. The tapes are fabricated from multi-filament fibers/yarns that are twisted together, bonded together, compressed and flattened.
摘要:
The invention relates to a method of producing rectifier parts which are made from a laminate composite material comprising reinforcing fibers that are embedded in a heat-polymerized polyimide resin matrix. The aforementioned parts comprise an inner platform, an outer platform and at least one solid blade which connects said platforms. The invention is characterised in that it comprises the following steps consisting in: a) producing the essential parts of the platforms, blades and the blade/platform connecting zones as separate structural elements, by stacking or winding layers of reinforcing fibers which have been impregnated with resin and which are used to form said structural elements, with the exception of the outer layers which form at least the boundary wall of the gas stream through the rectifier; b) imidizing separate structural elements; c) assembling said separate imidized structural elements; d) adding the outer layers of reinforcing fibers which have been impregnated with resin in order to form the part; e) placing the part thus produced in a mould/counter-mould employing compression polymerization; and f) polymerizing the part by subjecting same to compressive stresses.
摘要:
The invention relates to a precursor article of a composite material comprising a polymer matrix and at least one reinforcing wire and/or fibres, said article comprising at least one reinforcing wire and/or fibres and at least one polymer matrix wire and/or fibres. The invention also relates to composite materials comprising a reinforcing material and a thermoplastic matrix and to the articles obtained using said materials.