Yarn spreading and material soaking device and process for forming carbon fiber prepreg cloth

Abstract

The invention discloses a yarn spreading and material soaking device and process for forming carbon fiber prepreg cloth in the technical field of carbon fiber processing, the yarn spreading and material soaking device comprises a bottom plate, a first support and two second supports are arranged above the bottom plate, two transmission rollers are rotationally connected between the two second supports, and the two transmission rollers are used for transmitting the carbon fiber prepreg cloth; a storage box is arranged above the two transmission rollers; a yarn spreading mechanism is arranged on the bracket I and is used for spreading a plurality of groups of carbon fiber bundles into a cloth shape; a driving mechanism is arranged on the storage box and is used for driving the soaking mechanism to operate; according to the device, the resin is uniformly and equivalently smeared through the material soaking mechanism, so that the problems that when the carbon fiber prepreg is smeared with the resin in a dripping mode in the prior art, the resin is not uniformly smeared, the resin on the carbon fiber prepreg is not uniformly distributed, and the quality of the formed carbon fiber prepreg is influenced can be effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon fiber processing, and specifically to a yarn spreading and impregnating device and process for forming carbon fiber prepreg cloth. Background Art

[0002] Prepreg is an intermediate material for manufacturing composite materials and their components, constituting the basic unit of composite materials. The uniformity and stability of its quality are important links to ensure the quality and reliability of composite materials and their components.

[0003] After the carbon fiber prepreg cloth is spread, it needs to be coated with epoxy resin. When the existing carbon fiber prepreg cloth is coated with resin, a relatively common method is to use the natural dripping method. This method is to set a container for storing resin above the moving carbon fiber prepreg cloth, and then open a discharge port below the container. When the carbon fiber prepreg cloth is moving, the resin in the container will naturally drip onto the carbon fiber prepreg cloth, so as to achieve the effect of coating the resin on the carbon fiber prepreg cloth. However, there are some drawbacks in using this method. Since the resin is a fluid with high surface tension and poor overall fluidity, when the resin drips, the amount of resin dripping will decrease as the resin in the container decreases, and the fluidity of the resin is also related to its temperature. When the temperature of the resin decreases, its fluidity will also become poor. Therefore, the resin coated on the carbon fiber prepreg cloth will be distributed unevenly, and the amount of resin distributed at different positions on the carbon fiber prepreg cloth will be different. Summary of the Invention

[0004] The purpose of the present invention is to provide a yarn spreading and impregnating device and process for forming carbon fiber prepreg cloth, so as to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: A yarn spreading and impregnating device and process for forming carbon fiber prepreg cloth, including a bottom plate. Above the bottom plate, there is a support one and two support twos. Between the two support twos, two driving rollers are rotatably connected. The two driving rollers are used to drive the carbon fiber prepreg cloth. Above the two driving rollers, there is a storage tank. The support one is provided with a yarn spreading mechanism, and the yarn spreading mechanism is used to flatten multiple groups of carbon fiber bundles into a cloth shape. The storage tank is provided with an impregnating mechanism, and the impregnating mechanism is used to evenly coat the resin in the storage tank on the carbon fiber prepreg cloth in a quantitative manner. The storage tank is provided with a driving mechanism, and the driving mechanism is used to drive the impregnating mechanism to operate.

[0006] Preferably, the yarn spreading mechanism includes two limiting rods, which are symmetrically distributed on the left and right sides of the first bracket and are both fixedly connected to the bottom plate; the first bracket is slidably connected to the two limiting rods; a cylinder is provided at the bottom of the first bracket, one end of the cylinder is fixedly connected to the bottom plate and the other end is fixedly connected to the first bracket; spreading rollers are provided on the upper and lower sides inside the first bracket, and the two spreading rollers are respectively attached to the upper and lower surfaces of the carbon fiber prepreg; an electric heating wire is provided inside the spreading roller.

[0007] Preferably, the impregnating mechanism includes two impregnating cylinders, which are symmetrically distributed below the front and rear sides of the storage tank and are both fixedly connected to the storage tank; the impregnating cylinder is connected to the storage tank and an opening is provided at the bottom of the impregnating cylinder; a coating cylinder is provided inside the impregnating cylinder, the coating cylinder is hermetically attached to the inner wall of the impregnating cylinder and is rotatably connected to the impregnating cylinder; a plurality of material suction grooves are evenly formed on the surface of the coating cylinder, and the plurality of material suction grooves are arranged in a circumferential array on the surface of the coating cylinder; the distance between adjacent two material suction grooves is equal to the width of the material suction groove; the coating cylinders on the front and rear sides are arranged in a staggered manner; a material suction mechanism is provided inside the coating cylinder, and the material suction mechanism is used for sucking the resin in the storage tank into the material suction groove; a material discharging mechanism is provided inside the coating cylinder, and the material discharging mechanism is used for pushing the resin out of the material suction groove when the material suction groove rotates to the opening position of the impregnating cylinder following the coating cylinder.

[0008] Preferably, the material suction mechanism includes a plurality of first sealing plates, and the plurality of first sealing plates are respectively located in the plurality of material suction grooves; two second sealing plates are provided at the outer upper end of the first sealing plate, the second sealing plate is slidably connected to the first sealing plate and is slidably connected to the inner wall of the material suction groove; first push rods are symmetrically and fixedly connected to the left and right sides at the inner side of the first sealing plate, the first push rods penetrate through the coating cylinder and are slidably connected to the coating cylinder; a second push rod is provided on the first push rod; arc-shaped frames are symmetrically provided at the left and right sides inside the impregnating cylinder, and fixed frames are fixedly connected to the outer sides of the arc-shaped frames on the impregnating cylinder, and the left and right fixed frames are respectively fixedly connected to the left and right arc-shaped frames.

[0009] Preferably, the part of the arc-shaped frame from the bottom side to the position close to the storage tank is in a circular ring shape, the part of the arc-shaped frame excluding the circular ring shape is in a straight line shape, and the straight line part of the arc-shaped frame is tangent to the circular ring part of the arc-shaped frame; the distance between the second push rod and the axis of the coating cylinder is greater than the radius of the circular ring part of the arc-shaped frame; an air extraction cylinder is fixedly connected above the impregnating cylinder, and the air extraction cylinder is connected to the inner cavity of the impregnating cylinder.

[0010] Preferably, the material discharging mechanism includes a plurality of connecting plates, the number of the connecting plates is equal to that of the material suction grooves, and the plurality of connecting plates are circumferentially and arrayed inside the coating cylinder; symmetrically arranged on the left and right sides of each connecting plate are sliding rods, the sliding rods are fixedly connected to the inner wall of the coating cylinder, springs are sleeved on the sliding rods, one end of each spring is fixedly connected to the corresponding sliding rod and the other end is fixedly connected to the corresponding connecting plate; the sliding rods are slidably connected to the connecting plates, and the connecting plates are fixedly connected to the first push rods located on their left and right sides.

[0011] Preferably, a bidirectional threaded rod is arranged inside the coating cylinder, the left and right ends of the bidirectional threaded rod respectively penetrate through the fixing frames on the left and right sides and are rotatably connected to the fixing frames; the bidirectional threaded rod has self-locking property, driving frames are respectively sleeved on the left and right sides of the bidirectional threaded rod, the driving frames are in threaded connection with the bidirectional threaded rod and are slidably connected to the inner wall of the coating cylinder; on the side of the driving frame close to the inner wall of the coating cylinder is arranged a first slider, the first slider is in clearance fit with the driving frame and is slidably connected to the connecting plate; a connecting rod is rotatably connected to the first slider, the other end of the connecting rod is rotatably connected to a second slider, the second slider is slidably connected to the first push rod and is fixedly connected to the second push rod; rotation rings are fixedly connected to both the left and right ends of the bidirectional threaded rod.

[0012] Preferably, the driving mechanism includes two fixing plates, the two fixing plates are respectively fixedly connected to the left and right sides of the storage box and are respectively fixedly connected to the two brackets II; symmetrically rotatably connected to the left and right sides of the storage box are pulley I; symmetrically fixedly connected to the left and right sides of the coating cylinder is pulley II, and pulley II is in a ring shape; fixedly connected to the right fixing plate is a motor, the output shaft of the motor is fixedly connected to the right pulley I; a belt is arranged on pulley I, and the belt is meshed with pulley I and the two pulleys II at the same time.

[0013] Preferably, a driving shaft is arranged inside the storage box, the driving shaft is fixedly connected to the pulley I on the left and right sides and a plurality of stirrers are fixedly connected to the driving shaft, and electric heating wires are arranged inside the stirrers.

[0014] A spreading and impregnating process for forming carbon fiber prepreg, the specific steps of the process are as follows: Step 1: Thread multiple groups of carbon fiber tows into the spreading mechanism, and then start the spreading mechanism to flatten the multiple groups of carbon fiber tows into a cloth shape; Step 2: When the carbon fiber prepreg is transmitted to the impregnating mechanism position, start the driving mechanism to drive the impregnating mechanism to operate; Step 3: The impregnating mechanism evenly and quantitatively applies the resin in the storage box to the surface of the carbon fiber prepreg.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In the present invention, two rollers rotate. The material suction grooves on the rollers first suck materials from the storage box, and then apply the sucked materials onto the carbon fiber prepreg. By sucking and discharging materials through the material suction grooves, the effects of quantitatively and stably applying resin can be achieved. At least two rollers cooperate alternately to apply coatings on the carbon fiber prepreg, and the resins applied on the carbon fiber prepreg by the two rollers are fused with each other, so that a continuous resin coating can be formed on the carbon fiber prepreg, effectively solving the problems that when the resin is applied to the carbon fiber prepreg in a dripping manner in the traditional method, the resin application is not uniform enough and the resin distribution on the carbon fiber prepreg is uneven. In the present invention, by increasing the distance between the second push rod and the first sealing plate, when the coating cylinder rotates, the distance that the arc-shaped frame pushes the second push rod decreases, which will cause the distance that the first sealing plate moves in the material suction groove to decrease, and the amount of resin sucked by the first sealing plate and the two second sealing plates will decrease, which can achieve the effect of adjusting the amount of resin applied to the carbon fiber prepreg. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the rear view structure of the present invention; Figure 3 is a schematic diagram of the disassembled structure of the present invention; Figure 4 is a schematic diagram of the structure of the material dipping mechanism in the present invention; Figure 5 is a schematic diagram of the disassembled structure of the material dipping mechanism in the present invention; Figure 6 is a schematic diagram of the disassembled structure of the dipping cylinder in the present invention; Figure 7 is a schematic diagram of the sectional structure of the coating cylinder in the present invention; Figure 8 is Figure 7 an enlarged schematic diagram of A in Figure 9 is a schematic diagram of the sectional structure of the coating cylinder from a second perspective in the present invention; Figure 10 is Figure 9 an enlarged schematic diagram of B in Figure 11 is a schematic diagram of the structure of the driving mechanism in the present invention; Figure 12 is a schematic diagram of the structure of the yarn spreading mechanism in the present invention; Figure 13 is a working principle diagram of the coating cylinder in the present invention; Figure 14 is a schematic diagram of the principle of applying resin to the carbon fiber prepreg in the present invention.

[0017] In the attached drawings: 1. Bottom plate; 2. First support; 3. Second support; 4. Driving roller; 5. Storage tank; 6. Limit rod; 7. Cylinder; 8. Yarn spreading roller; 9. Impregnating cylinder; 10. Coating cylinder; 11. Suction trough; 12. First sealing plate; 13. Second sealing plate; 14. First push rod; 15. Second push rod; 16. Arc-shaped frame; 17. Fixed frame; 18. Air extraction cylinder; 19. Connecting plate; 20. Slide bar; 21. Spring; 22. Bidirectional threaded rod; 23. Driving frame; 24. First slider; 25. Connecting rod; 26. Second slider; 27. Rotating ring; 28. Fixed plate; 29. First belt pulley; 30. Second belt pulley; 31. Motor; 32. Belt; 33. Driving shaft; 34. Stirrer; 35. Air extraction port; 36. Suction port; 37. Prepreg; 38. Dot-shaped resin; 39. Continuous resin. Detailed implementation manners

[0018] Please refer to Figures 1 - 14 , the present invention provides a technical solution: a yarn spreading and impregnating device and process for forming carbon fiber prepreg, including a bottom plate 1, on which a yarn spreading mechanism for flattening multiple groups of carbon fiber bundles into a cloth shape is provided through a first support 2, and at least two driving rollers 4 for driving the carbon fiber prepreg are arranged on the bottom plate through a second support 3. Above the driving roller 4, a storage tank 5 for storing resin is provided; An impregnating mechanism is provided on the storage tank 5, and the impregnating mechanism is used to evenly apply a fixed amount of resin in the storage tank 5 onto the carbon fiber prepreg; Such as Figures 6 - 10 、 Figures 13 - 14As shown in the figure, the impregnating mechanism includes two impregnating cylinders 9. The two impregnating cylinders 9 are symmetrically distributed below the front and rear sides of the storage tank 5 and are both fixedly connected to the storage tank 5. The impregnating cylinder 9 is connected to the storage tank 5 and there is an opening at the bottom of the impregnating cylinder 9. A coating cylinder 10 is arranged inside the impregnating cylinder 9. The coating cylinder 10 is hermetically fitted to the inner wall of the impregnating cylinder 9 and is rotationally connected to the impregnating cylinder 9. A plurality of material suction grooves 11 are evenly formed on the surface of the coating cylinder 10. The plurality of material suction grooves 11 are arranged in a circular array on the surface of the coating cylinder 10. The distance between two adjacent material suction grooves 11 is equal to the width of the material suction groove 11. The coating cylinders 10 on the front and rear sides are staggeredly distributed. Since the material suction grooves 11 on the coating cylinder 10 are spaced apart, when the material suction grooves 11 on one coating cylinder 10 apply resin to the carbon fiber prepreg, the resin on the carbon fiber prepreg is also spaced apart and the width of the resin distributed on the carbon fiber prepreg is equal to the distance between two adjacent resins. By the staggered distribution of the coating cylinder 10 on the rear side and the coating cylinder 10 on the front side, the material suction grooves 11 on the coating cylinder 10 on the rear side exactly correspond to the vacant parts between two resins on the carbon fiber prepreg. When the coating cylinder 10 on the rear side rotates, the vacant parts on the carbon fiber prepreg can be coated with resin through the plurality of material suction grooves 11 on its surface, achieving the effect of continuously and evenly applying resin to the carbon fiber prepreg. A material suction mechanism is arranged inside the coating cylinder 10. The material suction mechanism is used to suck the resin in the storage tank 5 into the material suction grooves 11. A material discharging mechanism is arranged inside the coating cylinder 10. The material discharging mechanism is used to push the resin out of the material suction grooves 11 when the material suction grooves 11 rotate with the coating cylinder 10 to the opening position of the impregnating cylinder 9. A driving mechanism is arranged on the storage tank 5. The driving mechanism is used to drive the coating cylinder 10 to operate. During operation, multiple groups of carbon fiber tows are threaded into the yarn spreading mechanism, and then the yarn spreading mechanism is started to flatten the multiple groups of carbon fiber tows into a cloth shape. The carbon fiber prepreg in the cloth shape continues to be transmitted backward. When the carbon fiber prepreg is transmitted to the position of the two transmission rollers 4, at this time, the driving mechanism is started. The driving mechanism drives the coating cylinder 10 to rotate, and the impregnating mechanism will evenly and equally apply the resin in the storage tank 5 to the carbon fiber prepreg.

[0019] Specifically: Refer to Figure 14, the two driving rollers 4 rotate clockwise, driving the prepreg 37 from left to right. At the same time, the two coating cylinders 10 rotate counterclockwise at the same speed as the driving rollers 4. After the resin suction grooves 11 on the left coating cylinder 10 are filled with resin, when they successively rotate to the lower side closest to the prepreg 37, the resin is discharged onto the prepreg 37 to form a section of dot-shaped resin 38. As the prepreg 37 continues to be driven, multiple dot-shaped resins 38 are formed on the prepreg at intervals. The interval between two adjacent dot-shaped resins 38 is equal to the width of one dot-shaped resin 38. When the prepreg 37 is driven to the position of the right coating cylinder 10, when the right coating cylinder 10 rotates, new dot-shaped resin 38 is applied at the position between two dot-shaped resins 38 on the prepreg 37 through the multiple resin suction grooves 11 on its surface. The newly applied dot-shaped resin 38 merges with the two dot-shaped resins 38 on the prepreg to form a section of continuous resin 39. As the prepreg 37 continues to be driven, the length of the continuous resin 39 on the prepreg 37 will continuously increase. By evenly and quantitatively applying resin through the dipping mechanism, it can effectively solve the problem that when resin is applied to the carbon fiber prepreg in a dripping manner in the traditional method, the resin application is not uniform enough, the resin distribution on the carbon fiber prepreg is uneven, and thus the quality of the carbon fiber prepreg after molding is affected. It should be noted that if the number of coating cylinders 10 is increased, the width of the dot-shaped resin 38 can be reduced. In short, the number of coating cylinders 10 or the width of the resin suction grooves 11 should be aimed at forming continuous resin 39.

[0020] As Figures 6 - 10 , Figures 13 - 14 shown, as a further solution of the present invention, the resin suction mechanism includes a first sealing plate 12 slidably arranged in the resin suction groove 11, and several first sealing plates 12 are respectively located in multiple resin suction grooves 11. At the outer end of the first sealing plate 12 on the outer side, there are two second sealing plates 13. The second sealing plates 13 are slidably connected to the first sealing plate 12 and are also slidably connected to the inner wall of the resin suction groove 11. On the left and right sides of the inner side of the first sealing plate 12, there are symmetrically fixed first push rods 14. The first push rods 14 penetrate through the coating cylinder 10 and are slidably connected to the coating cylinder 10. There is a second push rod 15 on the first push rod 14. On the left and right sides of the dipping cylinder 9, there are symmetrically arranged arc-shaped frames 16. On the dipping cylinder 9, at the position outside the arc-shaped frames 16, there are fixed frames 17, and the left and right fixed frames 17 are respectively fixedly connected to the left and right arc-shaped frames 16. The part of the arc-shaped frame 16 from the bottom side to the position close to the storage tank 5 is in a circular ring shape, and the part of the arc-shaped frame 16 excluding the circular ring shape is in a straight line shape. The straight line part of the arc-shaped frame 16 is tangent to the circular ring part of the arc-shaped frame 16. The distance between the second push rod 15 and the axis of the coating cylinder 10 is greater than the radius of the circular ring part of the arc-shaped frame 16. Above the dipping cylinder 9, there is a fixed air extraction cylinder 18, and the air extraction cylinder 18 is connected to the inner cavity of the dipping cylinder 9. During operation, when the carbon fiber prepreg is conveyed to the bottom position of the first coating cylinder 10, the first coating cylinder 10 is started to rotate. When the coating cylinder 10 rotates, a plurality of material suction grooves 11 on its surface follow the rotation of the coating cylinder 10. When the material suction groove 11 rotates to the position where the impregnating cylinder is connected to the storage tank 5, at this time, the second push rod 15 fits against the arc-shaped frame 16. As the coating cylinder 10 continues to rotate, the second push rod 15 starts to move in the direction close to the axis of the coating cylinder 10 under the extrusion of the arc-shaped frame 16. The second push rod 15 drives the first push rod 14 to move, and the first push rod 14 drives the sealing plate one 12 in the material suction groove 11 to move. The sealing plate one 12 drives the two sealing plates two 13 connected to it to move. Under the action of the sealing plate one 12 and the two sealing plates two 13, the resin in the storage tank 5 will be sucked into the corresponding material suction groove 11. As the coating cylinder 10 continues to rotate, when the coating cylinder 10 drives the material suction groove 11 filled with resin to rotate to the directly above position, at this time, the material suction groove 11 is connected to the air extraction cylinder 18. By starting the air extraction cylinder 18, the air bubbles contained in the resin in the material suction groove 11 can be pumped away.

[0021] As Figures 7 - 9 shown, as a further solution of the present invention, the material discharging mechanism includes a plurality of connecting plates 19. The number of connecting plates 19 is equal to the number of material suction grooves 11, and the plurality of connecting plates 19 are circumferentially and arrayedly distributed inside the coating cylinder 10. On the left and right sides of the connecting plate 19, sliding rods 20 are symmetrically arranged. The sliding rods 20 are fixedly connected to the inner wall of the coating cylinder 10, and springs 21 are sleeved on the sliding rods 20. One end of the spring 21 is fixedly connected to the sliding rod 20, and the other end is fixedly connected to the connecting plate 19. The sliding rod 20 is slidably connected to the connecting plate 19, and the connecting plate 19 is fixedly connected to the first push rods 14 located on its left and right sides. During operation, when the coating cylinder 10 rotates to drive the material suction groove 11 filled with resin to rotate to the lowest position, at this time, the material suction groove 11 is exactly in the position closest to the carbon fiber prepreg. The corresponding second push rod 15 is exactly separated from the arc-shaped frame 16 at this time. After losing the limit of the arc-shaped frame 16, under the action of the spring 21, the connecting plate 19 in this position automatically moves downward. The connecting plate 19 drives the two first push rods 14 to move downward. The two first push rods 14 drive the sealing plate one 12 and the two sealing plates two 13 at the lowest position to move downward to the bottom position. The sealing plate one 12 and the two sealing plates two 13 will completely push out the resin in the lowest material suction groove 11, and the resin will fall onto the carbon fiber prepreg. Since the carbon fiber prepreg continues to be conveyed and the material suction grooves 11 on the coating cylinder 10 are spaced apart, the front coating cylinder 10 will coat the resin on the carbon fiber prepreg at intervals. When the carbon fiber prepreg is conveyed to the position below the rear coating cylinder 10, the rear coating cylinder 10 will coat the vacant part of the carbon fiber prepreg with resin.

[0022] As shown in Figures 6 - 8 the figure, as a further solution of the present invention, a bidirectional threaded rod 22 is provided inside the paint cylinder 10. The left and right ends of the bidirectional threaded rod 22 respectively penetrate through the fixed frames 17 on the left and right sides and are rotatably connected to the fixed frames 17. The bidirectional threaded rod 22 has self-locking property, and driving frames 23 are respectively sleeved on the left and right sides of the bidirectional threaded rod 22. The driving frames 23 are threadedly connected to the bidirectional threaded rod 22 and are slidably connected to the inner wall of the paint cylinder 10. A first slider 24 is provided at a position on the side of the driving frame 23 close to the inner wall of the paint cylinder 10. The first slider 24 has a clearance fit with the driving frame 23 and is slidably connected to the connecting plate 19. A connecting rod 25 is rotatably connected to the first slider 24, and the other end of the connecting rod 25 is rotatably connected to a second slider 26. The second slider 26 is slidably connected to the first push rod 14 and is fixedly connected to the second push rod 15. Rotating rings 27 are fixedly connected to both the left and right ends of the bidirectional threaded rod 22; During operation, when the rotating ring 27 is rotated, the rotating ring 27 will drive the bidirectional threaded rod 22 to rotate. When the bidirectional threaded rod 22 rotates, the driving frames 23 on the left and right sides inside the paint cylinder 10 will be driven to move left and right respectively. When the driving frame 23 (taking the left driving frame 23 as an example) moves, all the corresponding first sliders 24 are driven to slide leftward. When the first slider 24 moves, the second slider 26 will be driven to slide on the first push rod 14 in a direction close to the center of the paint cylinder 10 through the connecting rod 25. The second slider 26 drives the second push rod 15 to move, and the distance between the second push rod 15 and the first sealing plate 12 increases. When the paint cylinder 10 rotates, the distance that the arc-shaped frame 16 pushes the second push rod 15 decreases, resulting in a decrease in the distance that the first sealing plate 12 moves in the resin suction groove 11. The amount of resin sucked by the first sealing plate 12 and the two second sealing plates 13 will decrease, which can achieve the effect of adjusting the amount of resin coated on the carbon fiber prepreg.

[0023] As shown in Figures 5 - 6 and Figure 11 the figure, as a further solution of the present invention, the driving mechanism includes two fixing plates 28. The two fixing plates 28 are respectively fixedly connected to the left and right sides of the storage tank 5 and are respectively fixedly connected to the two second brackets 3. Symmetrically rotatable belt pulleys 29 are provided at the left and right positions of the storage tank 5. Belt pulleys 30 are symmetrically fixedly connected to the left and right positions of the paint cylinder 10, and the belt pulley 30 is in a ring shape. A motor 31 is fixedly connected to the right fixing plate 28, and the output shaft of the motor 31 is fixedly connected to the right belt pulley 29. A belt 32 is provided on the belt pulley 29, and the belt 32 is meshed with both the belt pulley 29 and the two belt pulleys 30 at the same time; A driving shaft 33 is provided inside the storage tank 5. The driving shaft 33 is fixedly connected to the belt pulleys 29 on the left and right sides, and a plurality of stirrers 34 are fixedly connected to the driving shaft 33. Electric heating wires are provided inside the stirrers 34; During operation, starting the motor 31 can drive the left pulley 29 to rotate. The left pulley 29 drives the drive shaft 33 to rotate, and the drive shaft 33 drives the right pulley 29 to rotate synchronously. The left and right pulleys 29 drive the two pulleys 30 on the left and right sides to rotate simultaneously through the belt 32. When the pulley 30 rotates, it drives the paint cylinder 10 to rotate; when the drive shaft 33 rotates, it drives a plurality of agitators 34 connected to it to rotate. Starting the electric heating wire in the agitator 34 can heat the resin in the storage tank 5, and cooperating with the agitation of the agitator 34 can effectively prevent the resin from solidifying.

[0024] As Figure 1 , Figure 12 shown, as a further solution of the present invention, the yarn spreading mechanism includes two limiting rods 6. The two limiting rods 6 are symmetrically distributed on the left and right sides of the support 1 2, and both limiting rods 6 are fixedly connected to the bottom plate 1; the support 1 2 is slidably connected to the two limiting rods 6; a cylinder 7 is provided at the bottom of the support 1 2. One end of the cylinder 7 is fixedly connected to the bottom plate 1 and the other end is fixedly connected to the support 1 2; spreading rollers 8 are provided at the upper and lower positions inside the support 1 2. The two spreading rollers 8 are respectively attached to the upper and lower surfaces of the carbon fiber prepreg; an electric heating wire is provided inside the spreading roller 8; During operation, when multiple groups of carbon fiber tows pass through the two spreading rollers, start the cylinder 7 to drive the support 1 2 to vibrate up and down reciprocally. The support 1 2 drives the two spreading rollers to vibrate up and down, so that the carbon fiber tows can be unfolded; by starting the electric heating wire inside the spreading roller, the carbon fiber prepreg can be preheated.

[0025] As a further solution of the present invention, a yarn spreading and impregnating process for forming carbon fiber prepreg, the specific steps of the process are as follows: Step 1: Thread multiple groups of carbon fiber tows into the yarn spreading mechanism, and then start the yarn spreading mechanism to flatten the multiple groups of carbon fiber tows into a cloth shape; Step 2: When the carbon fiber prepreg is transmitted to the impregnating mechanism position, start the driving mechanism to drive the impregnating mechanism to operate; Step 3: The impregnating mechanism evenly and quantitatively applies the resin in the storage tank to the surface of the carbon fiber prepreg.

Claims

1. A yarn spreading and impregnation device for forming carbon fiber prepreg, comprising a base plate (1) and a yarn spreading mechanism, wherein the yarn spreading mechanism is used to flatten a plurality of groups of carbon fiber bundles into a cloth shape; characterized in that: A bracket one (2) and two bracket twos (3) are provided above the bottom plate (1); two transmission rollers (4) are rotatably connected between the two bracket twos (3); the two transmission rollers (4) are used to transmit the carbon fiber prepreg; a storage box (5) is provided above the two transmission rollers (4); The storage box (5) is provided with a dipping mechanism, the dipping mechanism comprising at least two dipping cylinders (9) fixedly connected to the storage box (5), the dipping cylinders (9) being connected to the storage box (5) and having an opening at the bottom of the dipping cylinders (9); a coating cylinder (10) sealingly fitted with the inner wall of the dipping cylinder (9) is provided in the dipping cylinder (9), and a plurality of suction grooves (11) are evenly provided on the surface of the coating cylinder (10); a suction mechanism is provided in the coating cylinder (10), the suction mechanism is used to suck the resin in the storage box (5) into the suction groove (11); a material return mechanism is provided in the coating cylinder (10), the material return mechanism is used to push the resin out of the suction groove (11) when the suction groove (11) rotates with the coating cylinder (10) to the opening position of the dipping cylinder (9); The storage box (5) is provided with a driving mechanism, and the driving mechanism is used to drive the paint barrel (10) to rotate.

2. The device for spreading and impregnating carbon fiber prepreg according to claim 1, characterized in that: The material suction mechanism comprises a plurality of sealing plates (12), wherein the plurality of sealing plates (12) are respectively located in a plurality of material suction grooves (11); two sealing plates (13) are provided at one end of the upper outer side of the sealing plate (12), wherein the sealing plate (13) is slidably connected to the sealing plate (12) and the sealing plate (13) is slidably connected to the inner wall of the material suction groove (11); a first push rod (14) is symmetrically fixedly connected to the left and right sides of the inner side of the sealing plate (12), wherein the first push rod (14) passes through the coating tube (10) and is slidably connected to the coating tube (10); a second push rod (15) is provided on the first push rod (14); an arc frame (16) is symmetrically provided on the left and right sides of the immersion tube (9), and a fixed frame (17) is fixedly connected to the outer side of the arc frame (16) on the immersion tube (9), and the fixed frames (17) on the left and right sides are respectively fixedly connected to the arc frames (16) on the left and right sides.

3. The device for spreading and impregnating carbon fiber prepreg according to claim 2, characterized in that: The arc frame (16) is in a circular ring shape from the bottom side to the position close to the storage box (5), and the arc frame (16) is in a straight line shape except for the circular ring shape. The straight line shape part of the arc frame (16) is tangent to the circular ring shape part of the arc frame (16); the distance between the second push rod (15) and the axis of the paint cylinder (10) is greater than the radius of the circular ring shape part of the arc frame (16); and the upper position of the immersion cylinder (9) is fixedly connected with a vacuum cylinder (18), and the vacuum cylinder (18) is connected to the inner cavity of the immersion cylinder (9).

4. The device for spreading and impregnating carbon fiber prepreg according to claim 2, characterized in that: The material return mechanism comprises a plurality of connecting plates (19), the number of the connecting plates (19) being equal to the number of the material suction grooves (11), and the plurality of connecting plates (19) being distributed in a circular array inside the paint barrel (10); sliding rods (20) being symmetrically arranged at left and right sides of the connecting plate (19), the sliding rods (20) being fixedly connected to the inner wall of the paint barrel (10), and a spring (21) being sleeved on the sliding rod (20), one end of the spring (21) being fixedly connected to the sliding rod (20) and the other end being fixedly connected to the connecting plate (19); the sliding rod (20) being slidably connected to the connecting plate (19), and the connecting plate (19) being fixedly connected to first push rods (14) located on left and right sides thereof.

5. The device for spreading and impregnating carbon fiber prepreg according to claim 4, characterized in that: A bidirectional threaded rod (22) is provided in the paint barrel (10), and the left and right ends of the bidirectional threaded rod (22) respectively penetrate the fixed frames (17) on the left and right sides and are rotatably connected to the fixed frames (17); the bidirectional threaded rod (22) has a self-locking property, and the left and right side parts of the bidirectional threaded rod (22) are respectively sleeved with a driving frame (23), the driving frame (23) is threadedly connected to the bidirectional threaded rod (22), and the driving frame (23) is slidably connected to the inner wall of the paint barrel (10); the driving frame (23) is close to the inner wall of the paint barrel (10) A first slider (24) is provided at the side position, the first slider (24) and the driving frame (23) are clearance-matched and the first slider (24) is slidably connected to the connecting plate (19); a connecting rod (25) is rotatably connected to the first slider (24), the other end of the connecting rod (25) is rotatably connected to the second slider (26), the second slider (26) is slidably connected to the first push rod (14), and the second slider (26) is fixedly connected to the second push rod (15); and a rotating ring (27) is fixedly connected to both left and right ends of the bidirectional threaded rod (22).

6. The device for spreading and impregnating carbon fiber prepreg according to claim 1, characterized in that: The driving mechanism comprises two fixed plates (28), the two fixed plates (28) are respectively fixedly connected to the left and right side parts of the storage box (5), and the two fixed plates (28) are respectively fixedly connected to the two brackets (3); the left and right sides of the storage box (5) are symmetrically connected to the first pulley (29) for rotation; the left and right sides of the paint cylinder (10) are symmetrically fixedly connected to the second pulley (30), and the second pulley (30) is annular; the right fixed plate (28) is fixedly connected to a motor (31), and the output shaft of the motor (31) is fixedly connected to the first pulley (29) on the right side; the first pulley (29) is provided with a belt (32), and the belt (32) is meshed with the first pulley (29) and the two second pulleys (30) at the same time.

7. The device for spreading and impregnating carbon fiber prepreg according to claim 6, characterized in that: A drive shaft (33) is provided in the storage box (5), the drive shaft (33) is fixedly connected to pulleys (29) on the left and right sides, and a plurality of stirrers (34) are fixedly connected to the drive shaft (33), and an electric heating wire is provided in the stirrer (34).

8. The device for spreading and impregnating carbon fiber prepreg according to claim 1, characterized in that: The plurality of material suction grooves (11) are distributed in a circular array on the surface of the paint cylinder (10); the distance between two adjacent material suction grooves (11) is equal to the width of the material suction groove (11); and the paint cylinders (10) on the front and rear sides are staggered.

9. The device for spreading and impregnating carbon fiber prepreg according to claim 1, characterized in that: The yarn spreading mechanism comprises two limit rods (6), the two limit rods (6) are symmetrically distributed at the left and right sides of the bracket one (2), and the two limit rods (6) are fixedly connected to the bottom plate (1); the bracket one (2) is slidably connected to the two limit rods (6); a cylinder (7) is provided at the bottom of the bracket one (2), one end of the cylinder (7) is fixedly connected to the bottom plate (1) and the other end is fixedly connected to the bracket one (2); yarn spreading rollers (8) are provided at the upper and lower sides of the bracket one (2), and the two yarn spreading rollers (8) are respectively bonded to the upper and lower surfaces of the carbon fiber prepreg; and an electric heating wire is provided inside the yarn spreading roller (8).

10. A process for spreading yarn and impregnating carbon fiber prepregs, applicable to a spreading yarn and impregnating device for forming carbon fiber prepregs according to any one of claims 1 to 9, characterized in that: The specific steps of this process are as follows: Step 1: Pass multiple groups of carbon fiber tows into the yarn spreading mechanism, and then start the yarn spreading mechanism to flatten the multiple groups of carbon fiber tows into a cloth shape; Step 2: When the carbon fiber prepreg is transmitted to the position of the impregnation mechanism, the driving mechanism is started to drive the impregnation mechanism to operate; Step 3: The impregnation mechanism applies the resin in the storage box evenly and quantitatively to the surface of the carbon fiber prepreg.

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