A feeding device and feeding process for processing carbon fiber reinforced PP composite material

Abstract

The application discloses a kind of carbon fiber reinforced PP composite material processing with feeding device and feeding process, belong to carbon fiber composite material processing technical field, including frame, airflow mixer, compressor and control system, the maintenance platform is fixedly arranged on the frame, carbon fiber bunker and PP bunker are respectively arranged on the maintenance platform, driving assembly is arranged on the maintenance platform, first accurate feeder and second accurate feeder are respectively arranged in the bottom of carbon fiber bunker and PP bunker, the discharge port of first accurate feeder and second accurate feeder is all connected in the top feed port of airflow mixer, the gas inlet end of airflow mixer and the gas delivery end of compressor are communicated with conveying pipe, the present application can effectively protect carbon fiber during mixing and transporting by flexible rubber roll loose, low shear airflow mixing and optimizing flow rate delivery, reduce mechanical damage, maintain fiber aspect ratio, improve the mechanical properties of composite material.

Description

Technical Field

[0001] This invention relates to the field of carbon fiber composite material processing technology, specifically to a feeding device and feeding process for processing carbon fiber reinforced PP composite materials. Background Technology

[0002] Composite materials are multiphase solid materials composed of two or more substances with different physical and chemical properties. Carbon fiber composites are a type of composite material formed by adding carbon fibers as reinforcing components to a resin matrix. Resin matrices are divided into thermosetting and thermoplastic types. Common thermosetting resins include epoxy resins, vinyl ester resins, unsaturated polyester resins, and phenolic resins.

[0003] Currently, in the production of carbon fiber reinforced PP composite materials, the feeding process often uses traditional mechanical feeding devices.

[0004] The above technical conditions also have some drawbacks: carbon fibers are easily subjected to mechanical shear damage during the conveying and mixing process, which leads to fiber breakage and agglomeration, affecting the mechanical properties of composite materials; traditional volumetric or gravity feeding methods have low proportioning accuracy and large fluctuations in the feeding ratio, resulting in poor consistency between product batches.

[0005] Based on this, the present invention designs a feeding device and feeding process for processing carbon fiber reinforced PP composite materials to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a feeding device and feeding process for processing carbon fiber reinforced PP composite materials, so as to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a feeding device for processing carbon fiber reinforced PP composite materials, comprising a frame, an airflow mixer, a compressor, and a control system. A maintenance platform is fixedly installed on the frame, and a carbon fiber hopper and a PP hopper are respectively installed on the maintenance platform. A drive assembly is installed on the maintenance platform. A first precision feeder and a second precision feeder are respectively installed at the bottom of the carbon fiber hopper and the PP hopper. The outlets of the first precision feeder and the second precision feeder are both connected to the top inlet of the airflow mixer. A conveying pipe connects the air inlet of the airflow mixer and the air delivery end of the compressor. A Venturi conveyor is installed at the bottom of the airflow mixer. A connecting pipe is connected to the output end of the Venturi conveyor. A branch pipe is connected to the conveying pipe, and one end of the branch pipe is connected to the air inlet of the Venturi conveyor.

[0008] By adopting the above technical solution, precise proportioning and gentle mixing of carbon fiber and PP particles were achieved. Fiber damage was reduced and production continuity was improved by using an airflow mixer and a Venturi conveyor.

[0009] Preferably, the drive assembly includes a drive motor fixed on the maintenance platform, a first rotating shaft rotatably connected to the carbon fiber hopper, a second rotating shaft rotatably connected to the PP hopper, a transmission shaft fixedly connected to the output shaft of the drive motor, a first pulley coaxially arranged on the transmission shaft, a second pulley coaxially arranged on the first rotating shaft, a transmission belt connecting the first and second pulleys, a third pulley coaxially arranged on the transmission shaft, a fourth pulley coaxially arranged on the second rotating shaft, and a transmission belt connecting the third and fourth pulleys.

[0010] By adopting the above technical solution, the drive component uses belt pulley transmission to achieve synchronous drive of the first and second rotating shafts, ensuring coordinated bridging actions of the carbon fiber hopper and the PP hopper.

[0011] Preferably, the drive assembly further includes two sets of columns fixed on the maintenance platform, with a crossbeam fixedly connected to the two sets of columns, and the top ends of the first rotating shaft, the second rotating shaft, and the transmission shaft are all rotatably disposed at the bottom of the crossbeam.

[0012] By adopting the above technical solutions, the column and beam structure enhances the stability of the rotating shaft and prevents vibration and deviation during rotation.

[0013] Preferably, the diameter ratio of the first pulley to the second pulley is 1:5, and the diameter ratio of the third pulley to the fourth pulley is 5:1.

[0014] By adopting the above technical solution, the pulley diameter ratio is optimized to distribute the rotation speed, so that the rubber roller in the carbon fiber hopper rotates at low speed to gently loosen the fiber, and the rotating disk in the PP hopper rotates at high speed to effectively vibrate and prevent clumping.

[0015] Preferably, multiple sets of rubber rollers are arranged on the first rotating shaft and inside the carbon fiber hopper. The multiple sets of rubber rollers are arranged horizontally. Each rubber roller includes an inner core made of rubber. A silicone layer is provided on the outside of the inner core, and an antistatic layer is also provided on the outside of the silicone layer.

[0016] By adopting the above technical solution, the rubber roller uses a silicone layer and an antistatic layer, which reduces the electrostatic adsorption and mechanical damage of carbon fibers and improves the loosening effect.

[0017] Preferably, the inner side of the PP hopper is provided with multiple sets of springs, and an inner frame is provided on the multiple sets of springs. Sealing rings are provided at the connection between the inner frame and the top and bottom of the PP hopper. Connecting rods are fixedly connected to both sides of the top of the inner frame. Outer rings are fixedly connected to the two sets of connecting rods. Two sets of top blocks are provided on the bottom edge of the outer ring. A rubber block is connected to the bottom of the second rotating shaft. A rotating disk is connected to the bottom of the rubber block. Two sets of bottom blocks are provided on the rotating disk. When the rotating disk rotates, the two sets of bottom blocks can contact the two sets of top blocks respectively.

[0018] By adopting the above technical solution, the spring and inner frame vibration mechanism generate continuous vibration through the collision between the bottom block and the top block, which avoids PP particles from clumping and ensures smooth material feeding.

[0019] Preferably, a transfer pipe is provided at the connection between the first precision feeder and the second precision feeder and the airflow mixer, and both the first precision feeder and the second precision feeder are connected to the control system via signal.

[0020] By adopting the above technical solution, the connection angle between the feeder and the mixer is adjusted by the transfer pipe, which facilitates the equipment layout and enables the control system to adjust the feeding speed in real time.

[0021] Preferably, both the carbon fiber silo and the PP silo are provided with a material injection pipe on one side, and a pneumatic vibrator is also provided on the outside of the carbon fiber silo.

[0022] By adopting the above technical solutions, the injection pipe facilitates material addition, and the pneumatic vibrator assists in the discharge of carbon fiber silos, further preventing bridging.

[0023] Preferably, a ladder is provided on one side of the maintenance platform, and an installation flange is provided between the output end of the venturi conveyor and the connecting pipe.

[0024] By adopting the above technical solutions, the ladder facilitates maintenance personnel's repairs, and the installation of flanges makes the connection pipes flexible to be disassembled and assembled, adapting to different processing equipment.

[0025] A feeding process for processing carbon fiber reinforced PP composite materials includes the following steps: S1. Parameter settings: Set the target weight ratio of PP particles to carbon fiber in the control system; S2, Bridge Breaking and Material Discharge: Start the drive motor and control the first and second rotating shafts to rotate at different speeds. The rubber rollers in the carbon fiber hopper rotate slowly to gently loosen the carbon fiber in the hopper and prevent bridging. The rotating disk in the PP hopper rotates quickly. The bottom block continuously hits the top block, causing the inner frame to vibrate continuously and preventing PP plastic from clumping. S3, Precision Feeding: The first and second precision feeders output PP granules and carbon fibers precisely according to the set ratio based on the instructions of the control system. S4. Gentle mixing: PP particles and carbon fibers enter the airflow mixer together, and dry compressed air supplied by the compressor is introduced at the bottom, so that the two can achieve low-shear, three-dimensional uniform premixing in a fluidized state. S5. Material conveying: Under the action of airflow provided by the compressor, the Venturi conveyor conveys the premixed material to the downstream processing equipment at an optimized, low-damage airflow velocity. S6. Closed-loop control: The control system monitors the actual feed rate of the two feeders in real time and compares it with the set value, dynamically fine-tuning the feeding speed to achieve closed-loop precise control of the ratio.

[0026] In summary, this application has the following beneficial technical effects: 1. By using flexible rubber rollers to loosen the fibers, mixing with low-shear airflow, and optimizing flow rate during transport, carbon fibers can be effectively protected during mixing and transport, reducing mechanical damage, maintaining the fiber aspect ratio, and improving the mechanical properties of the composite material.

[0027] 2. By mixing with airflow, the fibers and resin particles are fully contacted in three-dimensional space, achieving uniform pre-dispersion and avoiding fiber agglomeration in subsequent processing.

[0028] 3. The unique loosening mechanism and vibration assistance completely solve the problems of bridging and clogging, ensuring the stable operation of the production process.

[0029] 4. The precision feeder, combined with the closed-loop control system, achieves high precision and stability in weight distribution, improving batch consistency of products.

[0030] 5. The entire feeding process is fully automated, reducing labor costs and improving production efficiency. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the overall structure of this embodiment; Figure 2 This is a schematic diagram of the premixing and conveying process in this embodiment; Figure 3 This is a schematic diagram of the driving component in this embodiment; Figure 4 This is a schematic diagram of the internal structure of the carbon fiber silo in this embodiment; Figure 5This is a schematic diagram of the layered structure of the rubber roller in this embodiment; Figure 6 This is a schematic diagram of the internal structure of the PP silo in this embodiment; Figure 7 for Figure 6 Enlarged view of the structure at point A in the middle; Figure 8 This is a schematic diagram of the structure of the outer ring and the rotating disk in this embodiment.

[0033] The attached diagram lists the components represented by each number as follows: 1. Frame; 2. Maintenance platform; 3. Carbon fiber hopper; 4. PP hopper; 5. Injection pipe; 6. Drive assembly; 61. Drive motor; 62. First shaft; 63. Second shaft; 64. Transmission shaft; 65. Pulley No. 1; 66. Pulley No. 2; 67. Transmission belt No. 1; 68. Pulley No. 3; 69. Pulley No. 4; 610. Transmission belt No. 2; 611. Column; 612. Crossbeam; 7. First precision feeder; 8. Second precision feeder; 9. 10. Airflow mixer; 11. Venturi conveyor; 12. Compressor; 13. Connecting pipe; 14. Ladder; 15. Transfer pipe; 16. Mounting flange; 17. Conveying pipe; 18. Branch pipe; 19. Rubber roller; 10. Inner core; 11. Silicone layer; 12. Antistatic layer; 13. Pneumatic vibrator; 24. Spring; 25. Inner frame; 26. Sealing ring; 27. Connecting rod; 28. Outer ring; 29. ​​Top block; 20. Rotating disk; 21. Bottom block; 22. Rubber block. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0036] A feeding device for processing carbon fiber reinforced PP composite materials includes a frame 1, an airflow mixer 9, a compressor 11, and a control system. A maintenance platform 2 is fixedly mounted on the frame 1. A carbon fiber hopper 3 and a PP hopper 4 are respectively mounted on the maintenance platform 2. A drive assembly 6 is mounted on the maintenance platform 2 to control the rotation of a rubber roller 18 in the carbon fiber hopper 3. The flexible rubber roller gently agitates the carbon fiber particles during rotation, breaking down the fiber bridges they form. Simultaneously, it also vibrates the inner frame 21 in the PP hopper 4, thereby preventing PP material from clumping and improving the feeding efficiency. A first precision feeder 7 and a second precision feeder 8 are respectively installed at the bottom of the carbon fiber hopper 3 and the PP hopper 4. The outlets of both the first precision feeder 7 and the second precision feeder 8 are connected to the airflow mixer. The top feed inlet of the mixer 9 and the air inlet of the airflow mixer 9 are connected by a conveying pipe 16, which allows dried and filtered compressed air to be introduced into the interior of the airflow mixer 9, so that PP particles and carbon fibers can be mixed gently and evenly in a fluidized state. A venturi conveyor 10 is set at the bottom of the airflow mixer 9, and a connecting pipe 12 is connected to the output end of the venturi conveyor 10. The connecting pipe 12 is connected to an extruder or other processing equipment, which can continuously and stably convey materials for downstream processing. A branch pipe 17 is connected to the conveying pipe 16. One end of the branch pipe 17 is connected to the air inlet of the venturi conveyor 10. Through the operation of a set of compressors 11, the airflow mixer 9 and the venturi conveyor 10 are provided with air source at the same time, which improves the utilization rate of the equipment.

[0037] Furthermore, the drive assembly 6 includes a drive motor 61 fixed on the maintenance platform 2, a first rotating shaft 62 rotatably connected to the carbon fiber hopper 3, and a second rotating shaft 63 rotatably connected to the PP hopper 4. A transmission shaft 64 is fixedly connected to the output shaft of the drive motor 61. A first pulley 65 is coaxially arranged on the transmission shaft 64, and a second pulley 66 is coaxially arranged on the first rotating shaft 62. A transmission belt 67 is driven between the first pulley 65 and the second pulley 66. A third pulley 68 is also coaxially arranged on the transmission shaft 64, and a fourth pulley 69 is coaxially arranged on the second rotating shaft 63. A transmission belt 610 is driven between the third pulley 68 and the fourth pulley 69. The drive motor 61 can simultaneously drive the first rotating shaft 62 and the second rotating shaft 63 to rotate, thereby achieving better control.

[0038] Furthermore, the drive assembly 6 also includes two sets of columns 611 fixed on the maintenance platform 2, with a crossbeam 612 fixedly connected to the two sets of columns 611. The top ends of the first rotating shaft 62, the second rotating shaft 63, and the transmission shaft 64 are all rotatably set at the bottom of the crossbeam 612, which can improve the stability of its operation.

[0039] Furthermore, the diameter ratio of the first pulley 65 to the second pulley 66 is 1:5, and the diameter ratio of the third pulley 68 to the fourth pulley 69 is 5:1. When the drive motor 61 is working, it can drive the first rotating shaft 62 to rotate slowly and drive the second rotating shaft 63 to rotate quickly to meet different needs.

[0040] Furthermore, multiple sets of rubber rollers 18 are arranged horizontally on the first rotating shaft 62 and inside the carbon fiber hopper 3. When the first rotating shaft 62 rotates, the rubber rollers 18 can effectively move the carbon fiber particles inside the carbon fiber hopper 3. Each rubber roller 18 includes an inner core 181 made of rubber. A silicone layer 182 is provided on the outside of the inner core 181. Silicone has soft properties and can gently move the carbon fiber particles. An antistatic layer 183 is also provided on the outside of the silicone layer 182 to avoid generating too much static electricity when moving the carbon fiber particles, thereby protecting the carbon fiber particles and improving the performance.

[0041] Furthermore, multiple sets of springs 20 are installed inside the PP hopper 4, and an inner frame 21 is installed on the multiple sets of springs 20. Sealing rings 22 are installed at the connection between the inner frame 21 and the top and bottom of the PP hopper 4. The sealing rings 22 are made of rubber and have a certain degree of extensibility. Connecting rods 23 are fixedly connected to both sides of the top of the inner frame 21. Outer rings 24 are fixedly connected to the two sets of connecting rods 23. Two sets of top blocks 25 are installed on the bottom edge of the outer rings 24. At the bottom end of the second rotating shaft 63 A rubber block 28 is connected, which is made of hard rubber and has low ductility. A rotating disk 26 is connected to the bottom of the rubber block 28. Two sets of bottom blocks 27 are set on the rotating disk 26. When the rotating disk 26 rotates, the two sets of bottom blocks 27 can contact the two sets of top blocks 25 respectively, so that the outer ring 24 can generate a certain vibration. The vibration is then transmitted to the inner frame 21 through the connecting rod 23, causing the inner frame 21 to vibrate, thereby placing the PP granules to clump in the hopper and further improving the material feeding effect.

[0042] Furthermore, a transfer pipe 14 is provided at the connection between the first precision feeder 7 and the second precision feeder 8 and the airflow mixer 9, which is used to adjust the material conveying angle to facilitate equipment layout. Both the first precision feeder 7 and the second precision feeder 8 are connected to the control system by signal to receive preset proportioning parameters and adjust their feeding speed in real time to maintain a constant feeding ratio.

[0043] Furthermore, a material injection pipe 5 is provided on one side of both the carbon fiber silo 3 and the PP silo 4 for adding materials into the silo. A pneumatic vibrator 19 is also provided on the outside of the carbon fiber silo 3 to provide auxiliary material feeding for the carbon fiber silo 3 and further improve the feeding effect.

[0044] Furthermore, a ladder 13 is provided on one side of the maintenance platform 2 to facilitate maintenance personnel to move onto the maintenance platform 2. An installation flange 15 is provided between the output end of the venturi conveyor 10 and the connecting pipe 12 for disassembly and assembly of the connecting pipe 12, which can be adapted to different usage scenarios.

[0045] The implementation principle of this embodiment is as follows: the entire feeding device achieves low-damage and high-precision feeding of carbon fiber and PP particles through the coordinated work of the drive component 6, the airflow mixer 9 and the venturi conveyor 10.

[0046] First, the target weight ratio of PP granules to carbon fiber is set in the control system. After the drive motor 61 is started, the transmission shaft 64 drives the first rotating shaft 62 and the second rotating shaft 63 to rotate through the pulley system. Since the diameter ratio of the first pulley 65 to the second pulley 66 is 1:5, the first rotating shaft 62 rotates at a low speed, so that the rubber roller 18 in the carbon fiber hopper 3 gently moves the carbon fiber to prevent bridging. At the same time, the diameter ratio of the third pulley 68 to the fourth pulley 69 is 5:1, and the second rotating shaft 63 rotates at a high speed, causing the bottom block 27 on the rotating disk 26 to periodically collide with the top block 25 on the outer ring 24. The inner frame 21 vibrates through the connecting rod 23 to prevent the PP granules from clumping.

[0047] Next, the first precision feeder 7 and the second precision feeder 8 accurately output PP particles and carbon fibers to the airflow mixer 9 according to the instructions of the control system. Dry compressed air supplied by the compressor 11 is introduced into the bottom of the airflow mixer 9, so that the materials are uniformly premixed in a fluidized bed state with low shear and three-dimensional space.

[0048] Then, the premixed material is conveyed to downstream equipment such as a twin-screw extruder by the Venturi conveyor 10 with optimized airflow speed. The entire process is monitored in real time by the control system, which dynamically adjusts the speed to achieve closed-loop control of the proportioning.

[0049] Finally, the stability of the drive assembly 6 and the flexible design of the rubber roller 18 ensure fiber integrity, while the vibration mechanism prevents PP material from clogging, making the entire system efficient and continuous.

[0050] A feeding process for processing carbon fiber reinforced PP composite materials includes the following steps: S1. Parameter settings: Set the target weight ratio of PP particles to carbon fiber in the control system; S2, Bridge breaking and material feeding: Start the drive motor 61 to control the first rotating shaft 62 and the second rotating shaft 63 to rotate at different speeds. The rubber roller 18 in the carbon fiber hopper 3 rotates slowly to gently loosen the carbon fiber in the hopper and prevent bridging. The rotating disk 26 in the PP hopper 4 rotates quickly. The bottom block 27 continuously hits the top block 25, causing the inner frame 21 to vibrate continuously and avoid PP plastic clumping. S3, Precision Feeding: The first precision feeder 7 and the second precision feeder 8 output PP particles and carbon fibers precisely according to the set ratio based on the instructions of the control system. S4. Gentle mixing: PP particles and carbon fibers enter the airflow mixer 9 together, and dry compressed air supplied by compressor 11 is introduced at the bottom to achieve low-shear, three-dimensional uniform premixing of the two in a fluidized state. S5. Material conveying: Under the action of the airflow provided by the compressor 11, the Venturi conveyor 10 conveys the premixed material to the downstream processing equipment at an optimized, low-damage airflow speed. S6. Closed-loop control: The control system monitors the actual feed rate of the two feeders in real time and compares it with the set value, dynamically fine-tuning the feeding speed to achieve closed-loop precise control of the ratio.

[0051] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0052] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A feeding device for processing carbon fiber reinforced PP composite materials, comprising a frame (1), an airflow mixer (9), a compressor (11), and a control system, characterized in that: A maintenance platform (2) is fixedly installed on the frame (1). A carbon fiber hopper (3) and a PP hopper (4) are respectively installed on the maintenance platform (2). A drive assembly (6) is installed on the maintenance platform (2). A first precision feeder (7) and a second precision feeder (8) are respectively installed at the bottom of the carbon fiber hopper (3) and the PP hopper (4). The outlets of the first precision feeder (7) and the second precision feeder (8) are connected to the top inlet of the airflow mixer (9). A conveying pipe (16) is connected between the air inlet of the airflow mixer (9) and the air delivery end of the compressor (11). A Venturi conveyor (10) is installed at the bottom of the airflow mixer (9). A connecting pipe (12) is connected to the output end of the Venturi conveyor (10). A branch pipe (17) is connected to the conveying pipe (16). One end of the branch pipe (17) is connected to the air inlet of the Venturi conveyor (10).

2. The feeding device for processing carbon fiber reinforced PP composite materials according to claim 1, characterized in that: The drive assembly (6) includes a drive motor (61) fixed on the maintenance platform (2), a first rotating shaft (62) rotatably connected to the carbon fiber hopper (3), and a second rotating shaft (63) rotatably connected to the PP hopper (4). A transmission shaft (64) is fixedly connected to the output shaft of the drive motor (61). A first pulley (65) is coaxially arranged on the transmission shaft (64). A second pulley (66) is coaxially arranged on the first rotating shaft (62). A first transmission belt (67) is driven between the first pulley (65) and the second pulley (66). A third pulley (68) is also coaxially arranged on the transmission shaft (64). A fourth pulley (69) is coaxially arranged on the second rotating shaft (63). A second transmission belt (610) is driven between the third pulley (68) and the fourth pulley (69).

3. The feeding device for processing carbon fiber reinforced PP composite materials according to claim 2, characterized in that: The drive assembly (6) also includes two sets of columns (611) fixed on the maintenance platform (2), and a crossbeam (612) is fixedly connected to the two sets of columns (611). The top ends of the first rotating shaft (62), the second rotating shaft (63) and the transmission shaft (64) are all rotatably set at the bottom of the crossbeam (612).

4. The feeding device for processing carbon fiber reinforced PP composite materials according to claim 2, characterized in that: The diameter ratio of the first pulley (65) to the second pulley (66) is 1:5, and the diameter ratio of the third pulley (68) to the fourth pulley (69) is 5:

1.

5. The feeding device for processing carbon fiber reinforced PP composite materials according to claim 2, characterized in that: Multiple sets of rubber rollers (18) are arranged on the first rotating shaft (62) and inside the carbon fiber hopper (3). The multiple sets of rubber rollers (18) are arranged horizontally. Each rubber roller (18) includes an inner core (181) made of rubber. A silicone layer (182) is provided on the outside of the inner core (181). An antistatic layer (183) is also provided on the outside of the silicone layer (182).

6. The feeding device for processing carbon fiber reinforced PP composite materials according to claim 2, characterized in that: The inner side of the PP hopper (4) is provided with multiple sets of springs (20), and an inner frame (21) is provided on the multiple sets of springs (20). A sealing ring (22) is provided at the connection between the inner frame (21) and the top and bottom of the PP hopper (4). A connecting rod (23) is fixedly connected to both sides of the top of the inner frame (21). An outer ring (24) is fixedly connected to the two sets of connecting rods (23). Two sets of top blocks (25) are provided on the bottom edge of the outer ring (24). A rubber block (28) is connected to the bottom of the second rotating shaft (63). A rotating disk (26) is connected to the bottom of the rubber block (28). Two sets of bottom blocks (27) are provided on the rotating disk (26). When the rotating disk (26) rotates, the two sets of bottom blocks (27) can contact the two sets of top blocks (25) respectively.

7. The feeding device for processing carbon fiber reinforced PP composite materials according to claim 1, characterized in that: A transfer pipe (14) is provided at the connection between the first precision feeder (7) and the second precision feeder (8) and the airflow mixer (9). Both the first precision feeder (7) and the second precision feeder (8) are connected to the control system via signal.

8. The feeding device for processing carbon fiber reinforced PP composite materials according to claim 1, characterized in that: Both the carbon fiber silo (3) and the PP silo (4) are equipped with a material injection pipe (5) on one side, and a pneumatic vibrator (19) is also provided on the outside of the carbon fiber silo (3).

9. The feeding device for processing carbon fiber reinforced PP composite materials according to claim 1, characterized in that: A ladder (13) is provided on one side of the maintenance platform (2), and an installation flange (15) is provided between the output end of the venturi conveyor (10) and the connecting pipe (12).

10. The feeding process for processing carbon fiber reinforced PP composite materials according to claim 1, characterized in that, Includes the following steps: S1. Parameter settings: Set the target weight ratio of PP particles to carbon fiber in the control system; S2, Bridge breaking and material feeding: Start the drive motor (61) and control the first rotating shaft (62) and the second rotating shaft (63) to rotate at different speeds. The rubber roller (18) in the carbon fiber hopper (3) rotates slowly to gently loosen the carbon fiber in the hopper and prevent bridging. The rotating disk (26) in the PP hopper (4) rotates quickly and the bottom block (27) continuously collides with the top block (25), causing the inner frame (21) to vibrate continuously and avoid PP plastic clumping. S3, Precision feeding: The first precision feeder (7) and the second precision feeder (8) output PP particles and carbon fibers precisely according to the set ratio according to the instructions of the control system. S4. Gentle mixing: PP particles and carbon fibers enter the airflow mixer (9) together, and dry compressed air supplied by the compressor (11) is introduced at the bottom to achieve low-shear, three-dimensional uniform premixing of the two in a fluidized state. S5. Material conveying: The Venturi conveyor (10) conveys the premixed material to the downstream processing equipment at an optimized, low-damage airflow speed under the action of the airflow provided by the compressor (11). S6. Closed-loop control: The control system monitors the actual feed rate of the two feeders in real time and compares it with the set value, dynamically fine-tuning the feeding speed to achieve closed-loop precise control of the ratio.

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