404 results about "Thermoplastic composites" patented technology

The invention discloses a composite material performance prediction method based on multi-field coupling multi-scale analysis and a knowledge graph, which integrates microstructure modeling, graph neural network representation learning, cross-scale parameter coupling modeling and robust optimization analysis. The method is suitable for prediction and design of key mechanical properties such as modulus, strength and toughness of a thermosetting / thermoplastic composite material under different working conditions. The method comprises the following steps: firstly, constructing a grain-level tissue knowledge graph based on an electron backscatter diffraction image, secondly, constructing a multi-scale input system comprising a microscopic variable (such as a fiber volume fraction), a mesoscopic variable (such as a layer thickness sequence) and a macroscopic variable (such as a load condition), and finally, performing robust optimization by utilizing a multi-objective evolutionary algorithm to obtain a multi-scale input system. And outputting a material performance prediction result and a knowledge graph associated with the ji structure-process-performance. According to the method, the accuracy and interpretability of performance prediction of the composite material can be remarkably improved, and data-knowledge dual-drive support is provided for design optimization of the high-performance composite material.

The invention belongs to the technical field of thermoplastic composite material ultrasonic welding, and particularly relates to a fabric fiber reinforced thermoplastic composite material energy-conducting-rib-free type continuous ultrasonic welding method which comprises the following steps: S1, cleaning the surface of a to-be-welded part of a fabric fiber reinforced thermoplastic composite material; s2, a workpiece to be welded is fixed to an anvil; s3, selecting an ultrasonic welding head; s4, the initial positions of the pre-pressing structure and the pressure maintaining structure are adjusted; s5, the moving path of the mechanical arm is planned, the posture of the mechanical arm is controlled, and the moving speed of the mechanical arm is set; s6, ultrasonic welding parameters are set; s7, the mechanical arm drives the ultrasonic welding head, the pre-pressing structure and the pressure maintaining structure to move downwards; and S8, the mechanical arm drives the ultrasonic welding head, the pre-pressing structure and the pressure maintaining structure to conduct continuous ultrasonic welding according to the set welding path and welding parameters, and after ultrasonic welding is completed, a power source is turned off. According to the invention, high-quality and high-efficiency connection of the composite material is realized.

The invention belongs to the technical field of uncertainty probability characterization analysis, and discloses a thermoplastic composite material leading edge structure design allowable value probability characterization method and system under a small sample condition, and the method comprises the steps: defining a plurality of candidate probability distribution models; fitting each model based on the original sample data and calculating an AIC value and a BIC value; a dynamic weight factor alpha is calculated according to the sample size n, and then a hybrid information criterion HIC value is calculated; generating a plurality of sample sets through Bootstrap self-service sampling, recalculating the HIC value on each sample set, and counting the selected optimal frequency of each model; and determining an optimal probability distribution model according to the frequency, wherein the optimal probability distribution model is used for representing a design allowable value. According to the method, the dynamic weight factor alpha is introduced, AIC and BIC criteria are effectively unified, optimal balance between prediction precision and model complexity is achieved under the condition of small samples, and engineering practicability and robustness are remarkably improved.

The invention discloses a fiber-reinforced thermoplastic resin-based composite material based on dynamic reversible interface interaction and a preparation method and a recycling method thereof. The fiber-reinforced thermoplastic resin-based composite material comprises a modified thermoplastic resin matrix and a modified fiber reinforcement which are compounded with each other, the modified thermoplastic resin matrix and the modified fiber reinforcement are bonded and connected through dynamic bonds with dynamic reversible interface interaction. Through construction of dynamic reversible interface interaction in the fiber-reinforced thermoplastic resin-based composite material, infiltration compounding and interface bonding between a fiber reinforcement and a high-viscosity thermoplastic resin melt can be enhanced, and interface debonding and total-value recycling of the fiber reinforcement in the composite material recycling process can be effectively promoted; therefore, the bottleneck problems of poor wettability in the forming process, low bonding fastness at a heterogeneous interface, insufficient mechanical properties, low waste recovery value and the like confronted by the development of the fiber-reinforced thermoplastic composite material are effectively solved.

The invention relates to the technical field of sheet conveying production, in particular to a continuous fiber reinforced thermoplastic composite sheet conveying production line which comprises two conveying frames, a conveying belt is arranged between the two conveying frames, and fixing plates are fixedly connected to the left portions of the upper ends of the two conveying frames. The upper ends of the two fixing plates are jointly and fixedly connected with a top plate. According to the continuous fiber reinforced thermoplastic composite sheet conveying production line, the continuous fiber reinforced thermoplastic composite sheet is extruded through the pressing rollers, bubbles possibly generated in the composite sheet in the thermoplastic process can be reduced, and therefore the compactness and structural integrity of the composite sheet are improved; and a spring is arranged in the extrusion mechanism, so that self-adaptive pressing of the composite sheets with different thicknesses can be realized, the equipment can quickly switch corresponding cold source or heat source types according to the materials, thicknesses or process requirements of the different composite sheets, and the adaptability of the production line to diversified production requirements is enhanced.

Embodiments relate to an enhanced method for building walls by primarily reducing the time for assembly. The design is for a molded multi-segment plastic composite construction block that interlocks horizontally, vertically and orthogonally with a clearance-fit, does not require mortar for structural integrity and is self-aligning. The blocks are molded out of natural-fiber reinforced thermoplastic composites with thermal expansion coefficient less than 0.0002 per degree Celsius and compression strength greater than 60 MPa.

The disclosure describes a device, method, and transfer apparatus for stamping thermoplastic composite blanks. The blanks may consist of laminated fibrous plies which may comprise continuous fibers in a thermoplastic polymer matrix. Supporting unidirectional fibers or holding tapes, pre-impregnated with polymer and extending beyond a shaping area's edges may be clamped in jaws, allowing the blank to be suspended and heated without sagging. The transfer system moves the blank between a heating station and a stamping station, where a punch and die may shape it while maintaining calibrated tension to reduce defects such as creasing or delamination. Advanced jaw mechanisms, including pivoting jaws with multiple clamping slots, enable differential tensioning of plies for precise forming of complex geometries. After stamping, excess fiber extensions may be trimmed and may be recycled. This approach eliminates the need for nonrecyclable polyimide films and improves process reliability for thick or heavy blanks.

The invention provides a middle-sized unmanned aerial vehicle structure and function integrated grating oil tank capable of being automatically and integrally formed and a forming method, and relates to the field of unmanned aerial vehicle structure design. The oil tank body is formed by integral compression molding of an upper skin and a lower skin, the grating separation layer is co-cured with the skins through insert injection molding by chopped carbon fiber reinforced thermoplastic resin to form honeycomb grids, and the oil inlet and outlet connector is an aluminum alloy flange and is fixed to the bottom of the oil tank through welding of aluminum alloy and thermoplastic composite materials. Based on the long and short fiber mixed integrated oil tank design and process technology, full-automatic integrated forming of the main bearing shell can be achieved, the oil tank skin guarantees the bearing capacity through the long continuous fiber composite material, the oil tank grating is made of the chopped fiber composite material, and the functions of sequential oil supply, overload resistance, shaking prevention and the like are achieved; and the number of oil tank parts is greatly reduced, and the potential of full-automatic manufacturing is achieved.

The utility model discloses a thermoplastic composite material component laying device. The thermoplastic composite material component laying device comprises a movement system and a laying execution mechanism, the laying execution mechanism comprises a tension unwinding mechanism, a rolling mechanism and a heater; thermoplastic prepreg tows are output and laid by the tension unwinding mechanism according to certain guidance, the output thermoplastic prepreg tows are heated by the heater, and the laid thermoplastic prepreg tows are rolled and solidified by the rolling mechanism to form a thermoplastic composite component; the laying execution mechanism is connected with the motion system, and the laying execution mechanism is driven by the motion system to do multi-degree-of-freedom motion. The device has high action flexibility and high efficiency, and can realize high-efficiency and high-precision laying and forming work.

The invention relates to the technical field of thermoplastic composite material welding, in particular to a composite material continuous ultrasonic welding method based on an interface microstructure, which comprises the following steps: carrying out positioning treatment on the surface of a thermoplastic composite material to be welded, and selecting welding parameters according to the property of the thermoplastic composite material to be welded; a microstructure texture is introduced into a to-be-welded interface of the thermoplastic composite material, and the microstructure texture has parameterized geometric properties; a flexible and continuous energy conduction item is arranged between the microstructure texture and the substrate on the opposite side, and molten resin is in a super-infiltration state in the initial welding stage through the ultrasonic vibration effect; and welding is completed under the set welding parameter condition. The welding performance of the thermoplastic composite material is improved, and a feasible technical path is provided for rapid assembly of complex structures in the future.

The invention discloses a forming mold and a preparation method of a surface reinforced thermoplastic composite material, and belongs to the field of high-performance thermoplastic composite material manufacturing, the forming mold comprises an upper mold, a lower mold and a frame; a plane boss is arranged at the bottom of the upper die, a reinforcing rib boss is detachably arranged at the bottom of the plane boss, and transverse lugs used for being locked by a locking mechanism are arranged on the two sides of the plane boss and the reinforcing rib boss respectively. The upper die and the lower die are matched through a frame, and the side face of the lower die is provided with a temperature detection hole used for containing a thermocouple. The surface reinforced thermoplastic composite material with excellent interface performance, dimensional stability and impact resistance can be prepared, the excellent mechanical property of a continuous fiber reinforced composite material and the manufacturing flexibility of a long fiber reinforced composite material can be integrated, and the surface reinforced thermoplastic composite material has a wide application scene.

The invention discloses a continuous ultrasonic welding method based on cooperation of a bionic interlocking microstructure and an energy conduction item. The continuous ultrasonic welding method comprises the following steps: cleaning a to-be-welded surface of a thermoplastic composite material workpiece; the method comprises the following steps: preparing a dual-scale bionic interlocking microstructure with a micron-scale circular convex claw-shaped array and a nano groove on the surface of a workpiece; a microstructure with the specific geometrical morphology is arranged on the surface of the other workpiece; carrying out microstructure etching on the energy conduction item, placing the microstructure energy conduction item between two workpieces, and applying vibration and pressure through a continuously moving ultrasonic welding head after butt joint, so that the interface resin is molten and filled into the bionic microstructure; and a mechanical interlocking interface is formed after pressure maintaining and cooling. Through collaborative design of the bionic microstructure and the energy conduction item, the interface bonding strength is remarkably improved, the problems of uneven energy, weak bonding and the like in traditional welding are solved, and the method is suitable for high-quality connection and repair of composite material components in the fields of aerospace, automobiles and the like.

The present invention relates to a method and device for ultrasonic additive manufacturing of thermoplastic composite materials. The method comprises: applying a certain pressure, and applying ultrasonic vibration as an energy input, to act jointly at an interface between two layers of thermoplastic composite materials of a workpiece; converting mechanical energy into internal energy to heat the interface between the thermoplastic composite materials in an extremely short period of time; tightly bonding the two layers of composite materials by means of an additive manufacturing method that carries out melting under the action of thermo-mechanical coupling to form a strong bond by means of molecular diffusion; and repeating the process above, such that each layer of composite material is bonded to the previous layer by means of ultrasonic vibration, thereby realizing layer-by-layer additive manufacturing of thermoplastic composite materials of the workpiece. On this basis, the preparation of parts having complex contour profiles by ultrasonic additive manufacturing is realized by means of various contours of molds. The present invention realizes additive manufacturing of complex contour profiles by controlling the translation of an ultrasonic additive manufacturing tool head and the rotation of materials. The present invention has the characteristics of good continuity, high additive manufacturing speed, high additive manufacturing energy and uniform energy.

The disclosure describes a device, method, and transfer apparatus for stamping thermoplastic composite blanks. The blanks may consist of laminated fibrous plies which may comprise continuous fibers in a thermoplastic polymer matrix. Supporting unidirectional fibers or holding tapes, pre-impregnated with polymer and extending beyond a shaping area's edges may be clamped in jaws, allowing the blank to be suspended and heated without sagging. The transfer system moves the blank between a heating station and a stamping station, where a punch and die may shape it while maintaining calibrated tension to reduce defects such as creasing or delamination. Advanced jaw mechanisms, including pivoting jaws with multiple clamping slots, enable differential tensioning of plies for precise forming of complex geometries. After stamping, excess fiber extensions may be trimmed and may be recycled. This approach eliminates the need for nonrecyclable polyimide films and improves process reliability for thick or heavy blanks.

A roof structure (10) for a vehicle roof is provided. The roof structure comprises structural members (22-1, 22-2, 22-3, 22-4, 22-4) arranged to define all or part of a roof opening corresponding to a roof panel opening (12) in the vehicle roof, the structural members overlapping along at least part of a periphery of the roof opening, the structural members being joined by a form bond, the structural members comprising a fibre-reinforced thermoplastic composite material.

The invention belongs to the technical field of fusion connection of a thermoplastic composite material and a metal laminated structure, and discloses a laser fusion temperature and pressure coordinated control process method for the thermoplastic composite material and the metal laminated structure. According to the method, follow-up pressing force application and temperature control in the laser connection process are achieved, follow-up pressing force application is achieved through clamping mechanisms designed at the two ends of a laser welding actuator respectively, and the contact portion of the clamping mechanism on one side and a workpiece is in a single-roller pre-clamping mode; and the contact part of the clamping mechanism on the other side and the workpiece adopts a multi-pressing-roller pressing and pressure maintaining mode. According to the temperature control function, the temperature of a connection interface is fed back in real time through an infrared online sensing system, then the output power of a laser heating head is changed in a self-adaptive mode to dynamically regulate and control energy irradiated on the metal surface, and finally control over the interface temperature of the laminated structure is achieved. According to the method, the problems of poor connection quality and the like caused by poor temperature consistency of connection areas and different pressing forces are solved, and the interface connection effect of the thermoplastic composite and the metal laminated structure is effectively improved.

The application belongs to the field of cutting processing, and discloses a kind of fiber reinforced thermoplastic resin matrix composite peripheral milling temperature prediction method, three heat sources of plastic deformation heat source, rake face and chip friction heat source, friction heat source of relief surface and machined surface are fully considered, and the total heat production of cutting in peripheral milling process is determined accordingly;On this basis, the anisotropic characteristics of the composite material are fully considered, and the distribution ratio of the total heat production of cutting in the tool, the workpiece and the chip is solved;And finally, a thermoplastic composite peripheral milling temperature prediction method is formed, and the accuracy of the calculation method is verified by experiment.The method disclosed by the application is simple in form and practical in function, and can greatly improve the accuracy of thermoplastic composite peripheral milling temperature prediction, thereby helping to promote the development of high-quality milling of thermoplastic composite.

This invention discloses an online mixing thermoplastic composite material injection machine, comprising material tanks A, B, C, and D. The bottom of material tank A is connected to material tank C; the bottom of material tank B is connected to material tank D; and the outlets of material tanks C and D are respectively connected to a mixing head. The mixing head is used to fully mix the raw materials in material tanks C and D, and the mixed raw materials are injected into an online mixing mold. Each of material tanks A, B, C, and D is equipped with a condenser, and a vacuum pump is installed at the outlet of the condenser. The vacuum pump is used to extract air from the material tanks, and the condenser is used to condense the raw materials mixed in the air and return the condensed raw materials to the material tanks. The online mixing thermoplastic composite material injection machine of this invention, by equipping the material tanks with condensers and vacuum pumps, extracts air from the material tanks before heating the raw materials and injects inert gas to protect the raw materials, preventing oxidation during heating and ensuring the quality of the injection-molded products.

The invention provides a thermoplastic composite material 3D printing wire rod and a preparation method thereof. The thermoplastic composite material 3D printing wire rod comprises a fiber matrix, and a first resin layer, a second resin layer and a third resin layer which wrap the fiber matrix and are sequentially stacked from inside to outside; wherein the first resin layer is formed after imidization of a water-soluble thermoplastic polyamide acid resin system, the second resin layer is formed after hot melting and shaping of a suspension prepared from semi-crystalline thermoplastic resin powder, and the third resin layer is formed after melting, pultrusion and shaping of a solution prepared from amorphous thermoplastic resin powder and a nano reinforcing material. Through the multi-layer resin structure design, matching of fiber resin and optimization of layers in the printing process are facilitated, the problems of high porosity and low interface bonding in the thermoplastic composite material 3D printing forming process are solved, and rapid and reliable application of the thermoplastic composite material 3D printing technology in the high-end fields such as aerospace is promoted.

Disclosed herein are multilayer composite laminates comprising continuous fibers and a polymer matrix comprising a poly(arylene sulfide) (PAS) polymer, a polyetherimide (PEI) polymer, and a polyamide-imide (PAI) polymer.

This invention belongs to the field of aerospace composite material manufacturing technology, specifically relating to a method and equipment for forming thermoplastic composite strain energy rods. First, prepreg is laid up to form a preform, which is then pressed by a flatbed pre-pressing device to form a preform sheet intermediate. Subsequently, the preform intermediate is fed into a hot-pressing module with a central heating and two-end cooling gradient temperature field. It undergoes melting and molding in a high-temperature zone and controlled cooling in a low-temperature zone to achieve final shaping. Finally, the formed rod is cooled and shaped, then pulled out at a uniform speed by a traction device and coiled and collected by a winding device, achieving continuous production. The hot-pressing module of the supporting hot-pressing equipment is equipped with a zoned heating and integrated cooling system, which can precisely construct a gradient temperature field and control the cooling rate. This invention, by using gradient temperature control to precisely regulate the material's crystallization behavior and release internal stress, effectively ensures the straightness, dimensional stability, and consistent deployment performance of the strain energy rod, perfectly meeting the manufacturing requirements of strain energy rods for large deployable structures in spacecraft.

A formation method is provided during which a lightning strike protection and thermoplastic material are arranged on a tool. The lightning strike protection includes a plurality of interconnected conductive elements. A thermoplastic composite structure is arranged over the lightning strike protection and the thermoplastic material with the lightning strike protection and the thermoplastic material between the tool and the thermoplastic composite structure. The tool is heated to provide a heated tool. The thermoplastic material is heated using the heated tool to melt the thermoplastic material and bond the lightning strike protection layer to the thermoplastic composite structure.

The invention provides a welding device and a welding method for a fiber-reinforced thermoplastic composite material, and relates to the technical field of thermoplastic composite material welding. An elastic assembly of a first mounting mechanism is vertically arranged between a bottom plate and a first platform, a first clamping assembly clamps a fiber reinforced thermoplastic composite upper base plate above the first platform, and the first end of the fiber reinforced thermoplastic composite upper base plate is located above the second end of a fiber reinforced thermoplastic composite lower base plate; the first end and the second end jointly clamp the energy guide rib and form a welding area. The welding mechanism is located above the welding area and used for welding the welding area. In the welding process, the elastic assembly can stretch out and draw back in a self-adaptive mode under the action of height change of a welding area or thermal deformation of materials, so that welding inclination angle deviation and deformation generated by a substrate on the fiber-reinforced thermoplastic composite material during welding are compensated, uniform transmission of ultrasonic energy is guaranteed, welding quality fluctuation is greatly reduced, and welding quality is improved.

The utility model belongs to the field of thermoplastic composite material, specifically discloses a paddle. The utility model's paddle uses short fiber reinforced resin as the outer skin, and the core material formed by the cooperation of the inside continuous fiber reinforced unidirectional tape forms the multi-scale fiber reinforced interface at the interface of the outer skin and the core material, improves the high and low temperature impact resistance of the paddle, reduces the risk of low temperature brittle fracture, enhances the interface bonding force of the paddle core material and the outer skin, reduces the influence of interlayer shrinkage stress, reduces the risk such as interface delamination, bulging and paddle deformation, and improves the mounting of the paddle.

A method of repairing a thermoplastic composite material is disclosed herein. The method includes placing the thermoplastic composite material on a supporting anvil, placing an energy transmission material on top of the thermoplastic composite material, and applying an ultrasonic welder to the thermoplastic composite material to consolidate and repair the thermoplastic composite material. Another method of repairing a thermoplastic composite material is disclosed herein. The method includes placing an energy transmission material on a supporting anvil, placing the thermoplastic composite material on top of the energy transmission material, and applying an ultrasonic welder to the energy transmission material to consolidate and repair the thermoplastic composite material.

The invention relates to the technical field of thermoplastic elastomer material production, and discloses a thermoplastic composite material composition, a thermoplastic composite material, and a preparation method and application thereof. The thermoplastic composite material composition contains an SBCs thermoplastic elastomer, polypropylene, filling oil, a carbon-based heat-conducting filler, a carbon-based reinforcing material and a dispersant, the SBCs thermoplastic elastomer contains maleic anhydride modified SEBS, relative to 100 parts by weight of the SBCs elastomer, the content of the filling oil is 50-120 parts by weight, and the content of the carbon-based heat-conducting filler is 50-120 parts by weight. The content of the polypropylene is 20-80 parts by weight, the content of the carbon-based heat-conducting filler is 10-60 parts by weight, the content of the carbon-based reinforcing material is 5-35 parts by weight, and the content of the dispersing agent is 1-10 parts by weight. The thermoplastic composite material obtained by using the composition disclosed by the invention has high thermal conductivity and high strength and is excellent in comprehensive performance.

The invention discloses a composite wing unmanned aerial vehicle wing forming and tooling integrated device and method based on a thermoplastic composite material. A traditional separated forming mold and an assembly tool are integrated, the assembly tool comprises a modular mold unit with a forming molded surface, and positioning grooves used for accurately positioning a wing spar and a wing rib are prefabricated in the molded surface; an electric heating system is arranged in the mold, so that a uniform and controllable temperature field is provided for laying the thermoplastic composite material; and a distributed optical fiber sensor network is embedded and is used for monitoring the temperature and the pressure on line in the whole process. The skin is laid on the heated mold in situ and cooled and formed; placing the internal framework into the positioning groove; and the positioning pin holes in the die are pressed and pressed tightly to finish assembly. According to the method, the standard is unified, multiple positioning errors are eliminated, the manufacturing period is greatly shortened, the tool cost is reduced, the advantages of in-situ melting and integral forming of the thermoplastic composite material are fully played, and the manufacturing precision, the structural performance and the production efficiency of the wing are remarkably improved.

The application provides a thermoplastic composite material rapid forming system and method, and belongs to the technical field of composite material forming. The system comprises a laminated laying device, a three-dimensional positioning device, a rapid preheating device, a special-shaped stamping device and a cutting post-processing device arranged in sequence along the conveying direction of a conveying track. A planar base tray moving along the conveying track is arranged on the conveying track. The planar base tray comprises an edge frame and a central plane, and the central plane is spliced by a plurality of detachable skeleton rods. The three-dimensional positioning device comprises a clamping fixing strip and an up-down surface pre-tightening device. The special-shaped stamping device comprises an upper die and a lower die, and the upper die and the lower die are located above and below the conveying track respectively and can move towards each other. Rapid automatic forming is realized through the linkage design of the planar base tray, the conveying track and the special-shaped stamping device.

The present application relates to the technical field of high polymer composite material, and particularly discloses a liquid nitrogen resistant ultra-low temperature thermoplastic composite film and a preparation method thereof. The film is prepared from the following raw materials: 50-70 parts of thermoplastic polyurethane elastomer, 15-30 parts of polycaprolactone, 2-12 parts of composite reinforcing filler, 2-5 parts of compatibilizer, 1-3 parts of ultra-low temperature toughening agent, and 0.5-1 part of antioxidant. The composite reinforcing filler comprises nanocellulose crystals. The present application also discloses a preparation method of the composite film, which comprises the steps of drying the raw materials, premixing, melt blending and extruding, casting film forming, and annealing treatment. The film has the following advantages: 1) through the optimization design of the thermoplastic polyurethane elastomer, PCL and the composite reinforcing filler, the composite film has excellent flexibility and mechanical strength at the temperature of liquid nitrogen; 2) through the synergistic effect of the composite reinforcing filler, a new gas barrier mechanism is constructed, and the oxygen permeation rate is reduced by more than 80%; and 3) the preparation method is simple and suitable for industrialized mass production.

The invention relates to the technical field of composite material manufacturing, in particular to a continuous fiber reinforced thermoplastic composite material mold pressing feeding device which comprises a supporting frame, a plurality of rollers are rotationally connected into the supporting frame, and one end of each roller extends out of the supporting frame and is coaxially and fixedly connected with a chain wheel. A driving assembly for driving the rollers to rotate is arranged at one end of the supporting frame, and the chain wheels are in chain transmission with the driving assembly; a plurality of L-shaped transverse plates transversely arranged between every two adjacent rollers are arranged on the lower portion of the supporting frame, first motors are installed on the long edges of the L-shaped transverse plates, output shafts of the first motors are coaxially and fixedly connected with a plurality of eccentric wheels, and the ends, away from the first motors, of the output shafts are rotationally connected with the short edges of the L-shaped transverse plates; the sieve plates are located in the motion trail of the eccentric wheel. Vibration dust removal of the fiber material is synchronously completed in the feeding process, so that the fiber surface cleanliness and the resin impregnation uniformity are remarkably improved, and the mechanical property and the surface quality of the finished composite material are improved.