97 results about "Carbon filaments" patented technology

Carbon composites, including carbon fibers, are disclosed and exhibit unique, advantageous mechanical properties, including inter laminar shear strength, compression strength, and resistance to forces applied at angles deviating from parallel to the longitudinal axis of the overall fiber. These improvements allow use of less material while conveying improved strength in myriad practical applications, reducing overall financial cost of fabrication, distribution, and practical utilization of resulting products. These advantages are optimized via utilizing inventive fabrication techniques that incorporate carbon filaments into carbon fibers, preferably incorporating carbon filaments including three-dimensional (3D) graphene platelets into said fibers. The filaments mechanically reinforce both individual fibers, as well as compositions including multiple fibers strung together in a single cord, by “crosslinking” the individual fibers with 3D graphene ligands. The combined result of these inventive efforts includes materials exhibiting superior mechanical strength and reduced mass relative to conventional carbon fibers.

The invention provides a preparation method of high-performance polyacrylonitrile pre-oxidized fibers, and belongs to the technical field of preparation of carbon filaments from polyacrylonitrile. The preparation method comprises the following steps: adding hydroxylated carbon nanotubes into deionized water, performing ultrasonic dispersion, adding a modifier and a catalyst, continuing ultrasonic dispersion, heating to 80-90 DEG C, performing constant-temperature reaction, fully washing with water, and drying to obtain modified carbon nanotubes; dispersing the modified carbon nanotube in an N, N '-dimethylformamide solution, adding an acrylonitrile monomer, hydroxyethyl acrylate and an initiator, copolymerizing to form a carbon nanotube / acrylonitrile copolymer, and spinning to obtain a carbon nanotube / acrylonitrile copolymer fiber; the carbon nano tube / acrylonitrile copolymer fiber is placed in a microwave treatment device, and a plurality of microwave generators are arranged in the microwave treatment device and are used for carrying out segmented pre-oxidation on the carbon nano tube / acrylonitrile copolymer fiber. The problems that an existing polyacrylonitrile fiber pre-oxidation technology is high in energy consumption and low in strength, poor in flame retardance and the like due to the difference between internal and external pre-oxidation effects can be solved.

The invention belongs to the field of lithium ion battery materials, and discloses a carbon source precursor, a phosphate positive electrode material and a preparation method and application of the phosphate positive electrode material, the carbon source precursor comprises glutenin and gliadin, and the mass ratio of the glutenin to the gliadin is (0.65-1): 1. According to the present invention, glutenin and gliadin are subjected to dehydration decomposition and carbonization to form a ring, the three-dimensional network skeleton structure is converted into the uniformly distributed carbon network coating layer, and the phosphate positive electrode material particles dispersed in the three-dimensional network skeleton structure are coated in situ, such that the overgrowth during the grain high-temperature sintering can be easily limited; secondly, a carbon network coating layer formed by carbonization and cyclization of glutenin and gliadin is in a carbon film shape and a carbon filament shape, and the surfaces of crystal grains are uniformly coated with a carbon film; the carbon filaments are uniformly dispersed on the surfaces of the phosphate positive electrode material particles and among the particles to form a carbon network skeleton, so that the electronic conductivity of the phosphate positive electrode material is improved, and the electrochemical performance of the battery is further improved.

The invention discloses a data acquisition and automatic control system for a carbon filament collecting machine, which adopts a modular design and comprises a main control module for connecting and controlling other modules, and a plurality of functional modules such as a display and operation interface module, a real-time monitoring module, a fault detection and early warning module, a shredding control module, a label printing module and a multi-device adaptation module. The system is realized on the basis of an MVVM (Model-View-ViewModel) architecture of a WPF (Wireless Power Function), and has good expansibility and maintainability. The system uses the SQL Server as a database, and the EFCore performs data operation, so that data access is more efficient and flexible. Meanwhile, the system supports parallel operation of a plurality of wire collecting machines, each wire collecting machine is managed through an independent thread, concurrence conflicts are avoided, PLC data can be obtained in real time, wire collecting machine equipment can be dynamically managed, and a proper label template is automatically selected for printing according to batch information.

The filament count of carbon fiber tows is increased by spreading and merging the carbon filaments of a first tow with the carbon filaments of a second tow. The carbon filaments of the first and second tows are spread apart using a gas stream. The spread tows are aligned with each other and contact each other as they pass over the grid in the presence of the same or different gas stream, thereby forming entangled tows. The entangled tows are then formed into a combined tow. The modulus and denier of the carbon filaments in the first and second tows can be the same, or they can be altered to provide a combined tow having a wide range of filament counts and filament combinations.

The utility model relates to an integrated carbon-carbon sagger preform forming and processing device. The integrated carbon-carbon sagger preform forming and processing device comprises a machine frame, an X-axis clamping and rotating mechanism, a Y-axis clamping and rotating mechanism, a lifting mechanism, a cuboid wood mold, an X-axis direction moving type unwinding mechanism, a Y-axis direction moving type unwinding mechanism and a needling mechanism, wherein the X-axis clamping and rotating mechanism, the Y-axis clamping and rotating mechanism, the lifting mechanism and the cuboid wood mold are arranged on the machine frame. By means of clamping and rotating switching of the X-axis clamping and rotating mechanism and the Y-axis clamping and rotating mechanism, integrated winding of carbon filaments on all the faces of the cuboid wood pattern is achieved; the lifting mechanism is used for driving the clamped cuboid wood pattern to ascend and descend, and when the clamped cuboid wood pattern moves to a target position, the needling mechanism is used for needling a carbon-carbon sagger prefabricated body forming material obtained after the surfaces of the cuboid wood pattern are wound with carbon filaments; the X-axis clamping and rotating mechanism and the Y-axis clamping and rotating mechanism are used for driving the cuboid wood pattern to rotate so as to switch different faces of the cuboid wood pattern. The carbon-carbon sagger prefabricated body is integrally formed, splicing is not needed, the mechanical strength is high, and the carbon-carbon sagger prefabricated body is not prone to being damaged.

The utility model discloses a carbon fiber winding device, including cross -motion mechanism, winding mechanism, yarn spreading mechanism etc. The spacing roller of yarn spreading mechanism, deflection roller, flat roll cross -setting, cooperate cross -motion mechanism servo drive screw rod subassembly, realize different K number carbon silk multi -angle tension regulation and accurate flattening, evenly cover 100-500mm bobbin, and winding mechanism passes through the slidable upper slide and the winding shaft recess snap, and adapts to multi -specification bobbin, and yarn spreading roller subassembly matches different carbon silk technology. Servo motor drive, bearing low friction rotation and sensor stroke protection promote the stability of operation, and the clamping of silk piece subassembly, button board etc. Enhance the operation convenience and equipment rigidity. The device solves the problem of traditional equipment tension instability, poor versatility etc., reduces the scrap rate, and improves the winding efficiency, and is suitable for the precision production of high -end equipment manufacturing field high -performance carbon fiber.

Carbon composites, including carbon fibers in a binder matrix, exhibit unique, advantageous mechanical properties, including inter laminar shear strength, compression strength, and resistance to forces applied at various angles. These improvements allow use of less material while conveying improved strength in myriad practical applications, reducing overall financial cost of fabrication, distribution, and practical utilization. These advantages are optimized via utilizing fabrication techniques that incorporate carbon filaments into carbon fibers, preferably incorporating carbon filaments and / or graphene platelets into said fibers, and incorporating the composite fibers, filaments, and / or graphene platelets into a binder matrix. The filaments and graphene platelets mechanically reinforce individual fibers, structures including multiple fibers strung together in a single cord, and the binder matrix, by “crosslinking” the individual fibers and / or fibers and binder matrix, e.g., with filaments and / or graphene ligands. The result includes materials exhibiting superior strength and reduced mass relative to conventional carbon fibers in a binder matrix.

The invention relates to the technical field of carbon fiber production tension monitoring, in particular to an online tension monitoring system suitable for a carbon fiber production process, which comprises the following components: a tension detection unit, which comprises GT-S1001B, GT-S1001C, GT-S1001D and GT-S1003 tensiometers arranged at outlets of different temperature zones of an oxidation furnace, the GT-S1004 tensiometer is arranged at an outlet of the low-temperature carbonization furnace, and the GT-S1005 tensiometer is arranged at an outlet of the high-temperature carbonization furnace. According to the on-line tension monitoring system suitable for the carbon fiber production process, the tension of the carbon filaments at different positions is continuously monitored on line, and the process is adjusted in time, so that on one hand, related detection indexes, including strength, modulus, density and the like, of the pre-oxidized filaments and the carbon filaments can be regulated and controlled; on the other hand, the appearance quality of the carbon filaments can be improved, and broken filaments, split filaments and other phenomena are reduced.

The invention relates to the technical field of carbon filament conveying, and discloses an anti-crossing and anti-friction carbon filament conveying device and method based on carbon fiber cloth, the anti-crossing and anti-friction carbon filament conveying device based on the carbon fiber cloth comprises a frame, a plurality of supports arranged at equal intervals in the front-back direction of the frame, and a plurality of bases arranged at equal intervals in the length direction of the supports; the conveying mechanisms are symmetrically arranged on the bases, and each conveying mechanism comprises a rotating shaft rotationally arranged on the corresponding base, a spline shaft fixed to the corresponding rotating shaft, a beam barrel shaft slidably connected to the surface of the corresponding spline shaft in a sleeving mode through the corresponding spline, a yarn barrel installed on the outer surface of the beam barrel shaft and carbon filaments wound around the surface of the yarn barrel. The beam cylinder shaft and the yarn cylinder are pushed to move in the axial direction of the spline shaft, so that the axial movement is dynamically matched with the spiral winding deviation of the carbon filaments, the filament outlet position is corrected in real time, the filament outlet point of the carbon filaments can be kept at a relatively fixed position all the time, and friction between the carbon filaments and the inner wall of a guide hole of the yarn guide frame is reduced.

Composite material part The present invention relates to a part (1) made of composite material comprising a fibrous reinforcement of ceramic or carbon wires (3), a ceramic matrix (5) and an interphase (7) covering the wires and located between the latter and the matrix, the part being characterized in that the interphase comprises a first layer (71) of amorphous boron nitride in contact with the wires and a second layer (72) of crystalline boron nitride covering the first layer. Figure for abstract: Fig. 1.

The present application relates to a skin beautification mirror with a tungsten-filament or carbon-filament light source. The skin beautification mirror comprises: a housing; and a main control board, a light source assembly and a power source assembly, which are mounted in the housing, wherein the light source assembly comprises a tungsten-filament or carbon-filament light source, and a window having a relatively large area is formed on a front end face of the housing. The skin beautification mirror further comprises a transparent substrate, wherein the transparent substrate covers the window to form a light-emergent face having a relatively large area, and the light-emergent face serves as a mirror face; a surface of the transparent substrate is integrally plated with a filter film, so as to form a transparent substrate having a filtering function, and / or a filter is mounted on an inner side of the transparent substrate; and after light generated by the tungsten-filament or carbon-filament light source passes through the filter film and / or the filter and is filtered, light in a predetermined interval waveband is obtained, and the light in the predetermined interval waveband passes through the light-emergent face to irradiate skin. In the present application, by means of the tungsten-filament or carbon-filament light source, full-spectrum light is generated, and in view of the filter film or the filter, light in more interval wavebands can be obtained to irradiate the skin, and thus more skin issues can be solved; moreover, the skin beautification mirror can be used as a beauty makeup mirror or a beauty mirror having a large mirror face, and thus multiple purposes of one machine are achieved and the skin beautification efficiency can be improved.

The invention relates to a cooking device (10) for cooking food products by means of infrared radiation. The cooking device (10) comprises a chassis (11), a rear housing (12) on the chassis (11), and a fixed upper cooking section (20) on the rear housing (12). The upper cooking section (20) contains a carbon filament (21) that generates infrared radiation and a reflector (22) that directs this radiation towards the food products. The device also has a movable mounting assembly (30) containing a grill (31), a grill carrier (32), and a grease collection tray (34). The mounting assembly (30) moves horizontally between the cooking position (P) under which the upper cooking section (20) is located and the mounting position (Y) from which it is at least partially extended, while the upper cooking section (20) maintains its fixed position. Figure 1

The invention belongs to the technical field of pultrusion carbon plate manufacturing, and particularly relates to an intelligent carbon fiber creel with a fiber filtering system, which comprises a creel body, a cavity is formed in the creel body, a negative pressure device communicated with the interior of the cavity is arranged on the top wall of the creel body, a plurality of winding drum hanging shafts are arranged in the cavity, and a discharge hole, a respirator and an opening and closing door are arranged on one side wall of the cavity. A fiber filter is arranged at the position, corresponding to each discharging hole, outside the cavity on the frame body, and a filter screen is arranged at the position, corresponding to the respirator, outside the cavity; the problems that a brush is installed on a production line to brush away dust on belt fibers, the brushed dust diffuses in a workshop, and in the process that untreated belt fibers are released from a winding drum, chippings (hairiness and carbon filaments) are generated, and consequently the air quality of the workshop is reduced are solved.

Windscreen wiper motor (10), comprising a housing (11), wherein an armature shaft (18) with a commutator (30) is arranged in the housing (11), the commutator interacting with carbon elements (31) arranged in the area of ​​a carbon retaining plate (35), which are electrically connected via electrical connections (36), preferably in the form of carbon strands, to a power supply for the windscreen wiper motor (10) via an interference suppression device (40), wherein the interference suppression device (40) is arranged at least substantially in an interference suppression housing (65) which is connected to the carbon retaining plate (35), wherein the interference suppression device (40) is at least indirectly connected to at least one connector connection element (50) which can be connected to connector contacts on a connector area (27) of the housing (11) which serve for contacting vehicle-side mating connectors,and wherein the at least one connector element (50) is fixedly received in its end position in the interference suppression housing (65), characterized in that the at least one connector element (50) is guided in a mounting direction when inserted into the interference suppression housing (65) by guide elements (72, 73) and is fixed in the end position by a snap-fit ​​connection in the interference suppression housing (65), and that the guide elements (72, 73) have extensions projecting from a base (71) of the interference suppression housing (65) in the direction of the connector element (50), which project positively into the opening cross-section of the connector element (50).

To provide a toothed belt 10 that achieves reduced dust emission and is suitable for high load transmission.SOLUTION: A toothed belt 10 has: a belt body 11 having a back rubber part 11a and a plurality of tooth rubber parts 11b, with the back rubber part 11a and the tooth rubber parts 11b composed of a thermoplastic elastomer composition; a core wire 13 buried in an inner peripheral portion of the back rubber part 11a; a tooth part covering material 14 that covers the plurality of tooth rubber parts 11b; and a side member 22 that is laminated on an end face 11 s of the belt body 11 and forms a belt end face 10 s. The thermoplastic elastomer composition comprises an elastomer component that is TPAE or TPC. The thermoplastic elastomer composition constituting the back rubber part 11a has hardness of 25-70, and the thermoplastic elastomer composition constituting the tooth rubber part 11b has hardness of 40-70, which is equal to or greater than the hardness of the thermoplastic elastomer constituting the back rubber part 11a. The core wire 13 contains a carbon filament and is not exposed from the belt end face 10 s.SELECTED DRAWING: Figure 1

The invention discloses a carbon-carbon heater blank forming device and a processing technology thereof, which belongs to the technical field of carbon-carbon heater manufacturing, and comprises the following steps: step 1: blank forming: adopting a pure mesh structure and a special forming device, firstly installing a forming mold, putting sulfuric acid paper on the mold, and winding carbon cloth, carbon filament, mesh cloth in sequence, then brushing resin on the mesh cloth, fixing it with carbon filament, and repeating the arrangement in the above manner until the outer diameter of the blank is larger than the product diameter by 1‑2 mm, and then winding 1‑10 mm carbon cloth, winding carbon filament every 1‑5 layers in the middle, and finally performing acupuncture; step 2: blank curing: curing temperature is 100‑300° C., and curing time is 1‑10 h; step 3: degumming: temperature is 500‑2000° C., time is 2‑20 h, and heating rate is 10‑100° C. / h; the invention is used to solve the problems of insufficient heat generation and resistance uniformity of traditional heater blanks and low blank manufacturing efficiency.

A toothed belt includes: a belt body having a flat band-shaped back rubber portion and tooth rubber portions placed on an inner circumferential side of the back rubber portion, the back rubber portion and the tooth rubber portions being each composed of a thermoplastic elastomer composition; a cord containing carbon filaments; and a tooth portion covering material provided on an inner circumferential side of the belt body and covering the tooth rubber portions. An elastomer component of the thermoplastic elastomer composition is a TPAE or a TPC, a hardness of the thermoplastic elastomer composition forming the back rubber portion is not less than 25 and not greater than 70, a hardness of the thermoplastic elastomer composition forming the tooth rubber portions is not less than 40 and not greater than 70, and the hardness of the thermoplastic elastomer composition forming the back rubber portion is not greater than the hardness of the thermoplastic elastomer composition forming the tooth rubber portions.

The utility model discloses a carbon filament take-up machine gear disc anti-tooth-disengaging mechanism, and belongs to the technical field of carbon fiber production equipment. The motor wheel set capable of swinging is arranged, the motor wheel set rotates and swings around a long shaft through limitation of the long shaft in the installation process, the tooth gap between a gear disc and a motor gear can be conveniently adjusted, an arc-shaped groove is formed in an installation base, and a locking screw used for locking rotation of the installation base is arranged in the arc-shaped groove; the position of the mounting base can be fixed after the tooth gap is adjusted, meanwhile, the locking screw is arranged in the arc-shaped groove so that the mounting base can be limited to be disengaged from the side away from the gear disc, and therefore the idle gear and the peripheral gear teeth of the gear disc can be engaged all the time without being disengaged.

The invention relates to a preparation method of a BMC (bulk molding compound) composite material based on pyrolyzed recycled carbon fibers, which comprises the following steps: pyrolyzing a pretreated waste carbon fiber composite material in an inert atmosphere to obtain recycled carbon fibers. The method comprises the following steps: ultrasonically cleaning recycled carbon fibers for 20-40 minutes by using acetone, performing vacuum drying, impregnating the recycled carbon fibers for 20-40 minutes by using a 1-3wt% silane coupling agent, and drying to obtain pretreated recycled carbon fibers; the recycled carbon fibers are mixed with an epoxy resin system according to the proportion of 30-45 wt% to prepare a BMC material body. And carrying out compression molding on the BMC material body to obtain the BMC composite material. According to the method, nitrogen protection, acetone ultrasonic cleaning and silane coupling agent activation are adopted, a proper epoxy resin system is selected, and the temperature difference between an upper mold and a lower mold is controlled, so that the recovered carbon filaments are effectively re-compounded. On the basis, the performance of the recycled carbon fibers is further improved by combining four procedures of compound catalytic liquid pretreatment, segmented slow cooling, low-temperature plasma decoking and nano coating repairing.

A method for producing N-type nanocarbon fibers or strips according to the present invention includes: a first step for heating at least a portion of a nanocarbon fiber or strip including a residue of a super acid solution; and a second step for doping a heated portion of the nanocarbon fibers or strips with an N-type dopant.

The utility model discloses a broken carbon filament cleaning device for carbon fiber weaving, which belongs to the technical field of carbon fiber production equipment and comprises a support, a fixing frame, a square supporting rod, a first tension roller, a second tension roller, a sinking and floating roller, a filament suction barrel and a containing chamber. According to the scheme, the double sinking and floating rollers are arranged to be matched with the first tension roller and the second tension roller to achieve cleaning of broken filaments of carbon cloth double-sided fibers, meanwhile, thickened golden velvet cloth is wound on the outer side of sponge to prevent the sponge from being damaged, and therefore the sponge is prevented from being damaged, and the service life of the sponge is prolonged. The yarn suction barrel and the containing chamber are arranged on the two sides of the device to collect falling broken filaments, environmental pollution is prevented, and the production environment is improved.

The automatic carbon fiber yarn winding equipment comprises a yarn roller transport vehicle, a carbon yarn guiding unit, a carbon yarn traction unit, a carbon yarn winding unit and a yarn frame transport vehicle, the yarn roller transport vehicle comprises a sub-control box, a yarn roller air expansion shaft, a carbon yarn placing platform and a carbon yarn pressing mechanism, and the middle of a transport vehicle main frame is connected with the sub-control box; the top of the sub-control box is connected with twelve wire roller air expansion shafts, each wire roller air expansion shaft is controlled by a servo motor, a carbon wire guide column is arranged between the upper row of wire roller air expansion shafts and the lower row of wire roller air expansion shafts, a carbon wire placing platform is arranged on the side, facing the wire outlet direction, of the transport vehicle main frame, and the carbon wire placing platform is connected with a carbon wire pressing mechanism facing the wire outlet direction. A carbon filament guide unit is arranged on the side, facing the filament outlet direction, of the filament roller transport vehicle.

The application belongs to the technical field of pultruded carbon plate manufacturing, and particularly relates to a carbon fiber intelligent creel with a fiber filtering system, which comprises a creel body, a cavity is arranged on the creel body, a negative pressure device is arranged on the top wall of the creel body and communicates with the inside of the cavity, a plurality of drum hanging shafts are arranged in the cavity, a discharge hole, a breather and a switch door are arranged on one side wall of the cavity, a fiber filter is arranged on the creel body outside the cavity and corresponds to each discharge hole, and a filter screen is arranged outside the cavity and corresponds to the breather; the application solves the problems that dust on the fiber is brushed off by installing a brush on the production line, the dust diffuses in the workshop, and scraps (fluff, carbon filaments) are generated in the process of releasing the untreated fiber from the drum, thereby causing the air quality in the workshop to decrease.

The utility model relates to the technical field of arrow shaft manufacturing, in particular to a variable-diameter carbon-coated aluminum arrow shaft which is provided with an aluminum pipe, a carbon fiber layer is arranged on the outer edge of the aluminum pipe, and the carbon fiber layer is sequentially provided with a first cylindrical section, a first circular truncated cone section, a second cylindrical section, a second circular truncated cone section and a third cylindrical section. The carbon fiber layer comprises a spiral winding carbon fiber layer arranged inside and a rolled carbon fiber layer arranged outside. By arranging the spirally wound carbon fiber layer and the rolled carbon fiber layer, the strength of the arrow shaft is improved, the spirally wound carbon fiber layer enables the carbon filaments to be distributed in the transverse direction and the longitudinal direction, and in the flying process of the arrow shaft, the transversely distributed carbon filaments can enhance the transverse external force resisting capacity of the arrow shaft; the longitudinally distributed carbon filaments can improve the strength of the arrow shaft in the axial direction and are not prone to tensile deformation or breakage in the length direction, the impact resistance of the arrow shaft can be enhanced through the multi-layer smooth filament rolling structure, the arrow shaft is protected against damage, and normal use and flight performance of the arrow are guaranteed.

The utility model belongs to the auxiliary field of waste silk collection in the start-stop and abnormal process of carbon fiber and precursor production, and particularly relates to an automatic waste silk collector in the carbon fiber production process. The device is composed of a set of counter-rotating type roller shafts, gears, a variable frequency motor, a cooling induced draft fan, a ton bag fixing device, an overall framework and a movable pulley block, a clamp-shaped protective cover is installed at the inlet end of each counter-rotating type roller shaft for protection, the situation that hands make contact with the roller shafts to be wound in, and mechanical damage is caused is prevented, and waste silk collection is facilitated through openings in clamp-shaped strips. Through the synergistic effect of mechanical transmission and wind power guiding, the problems of winding and scattering in the carbon fiber waste silk collecting process are effectively solved, and the device has the remarkable advantages of being high in collecting efficiency, high in equipment stability, convenient and fast to operate and maintain and the like.

A low-loss high-precision carbon filament drafting steering device comprises a bottom supporting frame, a frame stabilizing component, a side edge supporting plate, a direction adjusting plate, a carbon filament drafting roller, a filament penetrating hole plate and a drafting transmission mechanism, and through the design of the direction adjusting plate and an adjusting fixing piece, accurate adjustment of drafting force within a large range is achieved. The problems of winding and abrasion of the carbon filaments in the transmission process are effectively solved. Due to the inclined side edge structure, the carbon filaments can be naturally separated, mutual overlapping and winding are avoided, and the orderliness of carbon filament conveying is guaranteed. The adaptability and flexibility of the equipment are remarkably improved, the universality and reliability of the equipment in different production environments are improved, and greater convenience and guarantee are provided for production of enterprises.

A toothed belt in which a core wire is embedded, wherein the core wire is a carbon core wire, the core wire has a core wire diameter of 1.30-1.45 mm, the carbon core wire is a twisted yarn obtained by twisting carbon filaments, the twist of the core wire is single twist, the core wire has a twist number of 30-50 tpm, the core wire has an occupancy rate of 80-95% per belt unit width, the belt has a PLD of 1.25-1.60 mm, and the belt has a nominal pitch of the belt teeth is 11 mm.

The invention relates to the technical field of aircraft accessory processing, in particular to a carbon filament resin infiltration device for an aircraft girder, which comprises an infiltration box fixed on a base, a multi-connecting-rod mechanism for winding and infiltrating a carbon filament with resin is arranged in the infiltration box, and the multi-connecting-rod mechanism is positioned below the liquid level of the resin in the infiltration box; the side wall of the infiltration box is provided with a scraping cylinder used for scraping redundant resin on the surface of the carbon filament, the scraping cylinder is located above the liquid level of the resin, the bottom of the infiltration box is provided with a winding mechanism used for winding the infiltrated carbon filament into a cylinder and a circulating mechanism used for circularly filtering the resin, and the winding mechanism is in transmission connection with the circulating mechanism and the multi-connecting-rod mechanism. According to the carbon filament resin infiltration device for the aircraft girder, resin is more thoroughly immersed in carbon filaments, winding is carried out while the carbon filaments are infiltrated with the resin, time and labor are saved, the production efficiency is improved, the fluidity of the resin is improved while the carbon filaments are wound, and the resin is better combined with the surfaces of the carbon filaments.

The invention provides a method for preparing polyacrylonitrile pre-oxidized fibers in a segmented microwave mode, and belongs to the technical field of manufacturing carbon filaments from polyacrylonitrile. The method comprises the steps that polyacrylonitrile fibers are pretreated, taken out, dried and then placed in a microwave treatment device, a plurality of microwave generators are arranged in the microwave treatment device, the polyacrylonitrile fibers are subjected to segmented pre-oxidation, first-segment pre-oxidation is carried out for 5-10 min at the power of 600-800 W, second-segment pre-oxidation is carried out for 10-20 min at the power of 1000-1200 W, third-segment pre-oxidation is carried out for 20-30 min at the power of 1500-2000 W, and the polyacrylonitrile fibers are subjected to pre-oxidation at the power of 1000-1200 W; the problems that an existing polyacrylonitrile fiber pre-oxidation technology is high in energy consumption and low in strength, poor in flame retardant property, prone to slag falling and the like due to the difference between the internal pre-oxidation effect and the external pre-oxidation effect can be solved.