A heating device for carbon fiber prepreg yarn production

Abstract

This invention provides a heating device for producing carbon fiber prepreg yarn, belonging to the field of heating in carbon fiber prepreg yarn production. It includes a heating and cutting mechanism, a pushing mechanism, a cooling mechanism, and a winding mechanism. The invention utilizes a pushing mechanism and a spring to reduce the speed of the moving heating tube as it moves from the front to the rear of the heating cylinder, and also reduces its speed as it returns from the rear to the front. This creates a high-temperature zone near the first end cap and a low-temperature zone away from it. The yarn passes through the heating mechanism, undergoing preheating in the low-temperature zone and heating in the high-temperature zone. Dry air in the cooling cylinder then cools the heated yarn. Finally, the winding mechanism winds up the processed yarn. The pushing mechanism, using a pushing rod and a Y-shaped bracket, simultaneously moves the three moving heating tubes, reducing heating errors in the yarn.

Description

Technical Field

[0001] This invention relates to the field of heating technology in the production of carbon fiber prepreg yarn, specifically to a heating device for the production of carbon fiber prepreg yarn. Background Technology

[0002] Prepreg yarn is made by pre-impregnating fibers and resin. Heating during the production of carbon fiber prepreg yarn aims to promote resin curing, forming a robust composite material from the fibers and resin during this process. During heating, the resin cures through a chemical reaction, simultaneously releasing volatiles and creating strong chemical bonds between the matrix, fibers, and resin, thus improving the material's strength and stiffness. Furthermore, heating promotes resin penetration, allowing for a more uniform distribution of resin on the fiber surface, thereby enhancing the material's mechanical properties and durability. Therefore, appropriate heating is necessary in the production of carbon fiber prepreg yarn, but the temperature and time must be carefully controlled to avoid overheating or over-baking, which could negatively impact the material's performance.

[0003] Existing equipment only maintains a constant temperature during the heating process of fiber yarn production, without a gradual temperature increase from low to high. As a result, the fiber yarn does not have a temperature adaptation period when it is heated, which reduces the quality of the formed fiber yarn. After the fiber yarn is heated, there is no device to cool it down, and the fiber yarn at a high temperature is not conducive to the subsequent winding process. Summary of the Invention

[0004] The present invention provides a heating device for fiber yarn production to solve the problems mentioned in the background art.

[0005] This invention provides a heating device for producing carbon fiber prepreg yarn, including a heating mechanism, a pushing mechanism, a cooling mechanism, and a winding mechanism. A pushing mechanism is located in front of the heating mechanism, a cooling mechanism is located behind the heating mechanism, and a winding mechanism is located behind the cooling mechanism. The heating mechanism includes a heating cylinder, fixed heating tubes, guide grooves, movable heating tubes, and clearance grooves, a first end cap, and a first through hole. The heating cylinder is a horizontally placed cylindrical structure with open ends. Three fixed heating tubes are circumferentially distributed on the inner wall of the heating cylinder, and three guide grooves are also circumferentially distributed on the inner wall of the heating cylinder. The three guide grooves and the three fixed heating tubes are alternately distributed. A movable heating tube is slidably disposed inside each of the three guide grooves. Clearance grooves are provided on both the left and right sides of the heating cylinder. A first end cap is fixedly disposed on the edge of the rear opening of the heating cylinder, and multiple first through holes are provided on the first end cap.

[0006] The pushing mechanism includes a drive motor, a push rod, a connecting column, a Y-shaped bracket, a baffle groove, and a heat equalization unit. The output end of the drive motor is fixedly equipped with a push rod. Each of the three movable heating tubes has a connecting column fixedly installed on its front end face. The three ends of the Y-shaped bracket are fixedly connected to the three connecting columns. The side wall of the push rod contacts the center of the Y-shaped bracket. A baffle groove corresponding to the three sides of the Y-shaped bracket is fixedly installed at the edge of the front opening of the heating cylinder. A heat equalization unit is installed on the rear end face at the center of the Y-shaped bracket.

[0007] The pushing mechanism and the spring work together to slow down the speed of the moving heating tube as it moves from the front end to the rear end of the heating cylinder, and also slow down the speed as it returns from the rear end to the front end of the heating cylinder. This creates a high-temperature zone near the first end cap and a low-temperature zone away from the first end cap. The fiber yarn passes through the inside of the heating mechanism, is preheated in the low-temperature zone, heated in the high-temperature zone, and then cooled in the cooling mechanism. Finally, the winding mechanism winds up the fiber yarn.

[0008] In one possible implementation, the heating mechanism further includes a spring and an insulation layer. The spring is disposed in a guide groove, one end of the spring is fixedly connected to the first end cap, and there is a gap between the other end of the spring and the movable heating tube. An insulation layer is wrapped around the outer cylinder wall near the rear end of the heating cylinder.

[0009] In one possible implementation, the heat equalization unit includes a V-shaped support frame, a fixed rod, a first gear, a first fan blade, a cylindrical rod, and a rack. The V-shaped support frame is fixedly installed on the upper wall of the inner cylinder of the heating cylinder, and there are two V-shaped support frames arranged in a front-to-back pattern. The two sides of the V-shaped support frame are respectively located on both sides of the uppermost fixed heating tube. A horizontal fixed rod is fixedly installed at the lower end of the V-shaped support frame. There are two fixed rods arranged in a left-to-right pattern. A first gear is rotatably installed between the two fixed rods via a rotating shaft. There are two first gears arranged in a front-to-back pattern. Multiple first fan blades are fixedly installed circumferentially at both ends of the rotating shaft and on the outer side of the two fixed rods. The cylindrical rod is fixedly installed on the central end face of the Y-shaped bracket, and a rack is fixedly installed on the cylindrical rod. The rack meshes with the first gear.

[0010] In one possible implementation, the cooling mechanism includes a cooling cylinder, a second end cap, a second through hole, an air inlet duct, and a ventilation mesh. The cooling cylinder is located behind the heating mechanism. Second end caps are fixedly installed on the edges of both the front and rear openings of the cooling cylinder. The second end caps have second through holes that correspond one-to-one with multiple first through holes. Ventilation holes are provided on the cylinder wall of the cooling cylinder. An air inlet duct is fixedly installed on the outer wall of the cooling cylinder at the position corresponding to the ventilation holes. A ventilation mesh is fixedly installed in each ventilation hole at a position flush with the inner and outer cylinder walls.

[0011] In one possible implementation, the cooling mechanism further includes a desiccant, an exhaust motor, and a second fan blade. The desiccant is placed between two ventilation screens, and an exhaust motor is fixedly installed at the end of the air inlet duct away from the ventilation hole. Multiple second fan blades are circumferentially fixed at the output end of the exhaust motor.

[0012] In one possible implementation, the winding mechanism includes a second gear, a winding shaft, and winding spacers. There are two second gears that mesh with each other. The winding shaft is detachably mounted on the second gear. Multiple winding spacers are fixedly mounted on the winding shaft. The gap between the two winding spacers farther from the second gear corresponds to the two upper second through holes, and the gap between the two winding spacers closer to the second gear corresponds to the two lower second through holes.

[0013] Beneficial effects: 1. The pushing mechanism and spring provided by the present invention work together to make the speed of the moving heating tube decrease from fast to slow when it moves from the front end of the heating cylinder to the rear end of the heating cylinder, and the speed of the moving heating tube also decreases from fast to slow when it returns from the rear end of the heating cylinder to the front end of the heating cylinder, thereby forming a high temperature zone in the space near the No. 1 end cover and a low temperature zone in the space away from the No. 1 end cover.

[0014] 2. The insulation layer and the No. 1 end cap provided by this invention provide a certain degree of insulation for the high-temperature zone, so that the high-temperature zone is always in a basically constant temperature state.

[0015] 3. The pushing mechanism provided by the present invention enables the simultaneous movement of three movable heating tubes through a pushing rod and a Y-shaped bracket, thereby reducing the heating error of the fiber yarn.

[0016] 4. The multiple No. 1 fan blades in the uniform heating unit provided by the present invention stir the heat in the heating cylinder in a small range, making the heat in the heating cylinder more uniform. During the heating process, the fiber yarn is heated more evenly, which is beneficial to improving the forming quality of the fiber yarn. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a front view of the present invention.

[0019] Figure 3 This is a side view of the present invention.

[0020] Figure 4 This is a rear view of the present invention.

[0021] Figure 5 This is a schematic diagram of the heating mechanism of the present invention in its working state.

[0022] Figure 6This is a three-dimensional structural diagram of the present invention (excluding the heating cylinder).

[0023] Figure 7 This is a schematic diagram of the driving mechanism structure of the present invention (excluding the connecting column).

[0024] Figure 8 This is a schematic diagram of the cooling mechanism of the present invention.

[0025] Figure 9 This is the present invention. Figure 6 An enlarged schematic diagram of region A in the middle.

[0026] In the diagram: 1. Heating mechanism; 11. Heating cylinder; 12. Fixed heating tube; 13. Guide groove; 14. Moving heating tube; 15. Spring; 16. Alternating groove; 17. Insulation layer; 18. End cap No. 1; 19. Through hole No. 1; 2. Pushing mechanism; 21. Drive motor; 22. Push rod; 23. Connecting column; 24. Y-shaped bracket; 25. Baffle groove; 26. Heat equalization unit; 261. V-shaped support frame 262. Fixed rod; 263. Gear No. 1; 264. Fan blade No. 1; 265. Cylindrical rod; 266. Rack; 3. Cooling mechanism; 31. Cooling cylinder; 32. End cap No. 2; 33. Through hole No. 2; 34. Air inlet duct; 35. Desiccant; 36. Ventilation mesh; 37. Exhaust fan motor; 38. Fan blade No. 2; 4. Winding mechanism; 41. Gear No. 2; 42. Winding shaft; 43. Winding partition. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Please see Figure 1 , Figure 3 and Figure 5A heating device for producing carbon fiber prepreg yarn includes a heating mechanism 1, a pushing mechanism 2, a cooling mechanism 3, and a winding mechanism 4. The pushing mechanism 2 is located in front of the heating mechanism 1, the cooling mechanism 3 is located behind the heating mechanism 1, and the winding mechanism 4 is located behind the cooling mechanism 3. The heating mechanism 1 includes a heating cylinder 11, fixed heating tubes 12, guide grooves 13, movable heating tubes 14, a spring 15, a clearance groove 16, a heat insulation layer 17, a first end cap 18, and a first through hole 19. The heating cylinder 11 is a horizontally placed cylindrical structure with open ends. A first end cap 18 is fixedly installed on the edge of the rear opening of the heating cylinder 11. Three fixed heating tubes 12 are circumferentially distributed on the inner wall of the heating cylinder 11. The length of the fixed heating tubes 12 is less than the length of the heating cylinder 11. Three guide grooves are also circumferentially distributed on the inner wall of the heating cylinder 11. The three guide grooves 13 and the three fixed heating tubes 12 are distributed alternately. The length of the guide groove 13 is the same as the length of the fixed heating tube 12. A movable heating tube 14 is slidably installed inside each of the three guide grooves 13. The length of the movable heating tube 14 is less than the length of the guide groove 13. A spring 15 is installed inside the guide groove 13. One end of the spring 15 is fixedly connected to the first end cap 18. There is a gap between the other end of the spring 15 and the rear end face of the movable heating tube 14 to prevent the movable heating tube 14 from continuously heating the spring 15. The left and right sides of the heating cylinder 11 are provided with clearance grooves 16, and the length of the clearance groove 16 on the left side is greater than the length of the clearance groove 16 on the right side. The outer cylinder wall near the rear end of the heating cylinder 11 is wrapped with a heat insulation layer 17. The first end cap 18 is provided with multiple first through holes 19 for fiber yarns to pass through.

[0029] When the fixed heating tube 12 is energized, it heats the interior of the heating cylinder 11. When the temperature inside the heating cylinder 11 reaches the temperature of the fixed heating tube 12, the winding mechanism 4 starts working to wind up the fiber yarn. Simultaneously, the movable heating tube 14 is energized, and the pushing mechanism 2 starts working. The pushing mechanism 2 pushes the movable heating tube 14 towards the first end cap 18. Before the movable heating tube 14 contacts the spring 15, it moves rapidly. When the movable heating tube 14 contacts the spring 15, the spring 15 begins to be compressed, and the elastic force of the spring 15 increases as the movable heating tube 14 continuously compresses the spring 15. The moving speed of the moving heating tube 14 towards the first end cover 18 slows down. During this process, a heating process occurs. The temperature of the moving heating tube 14 and the temperature of the fixed heating tube 12 gradually increase over time, thus forming a high-temperature zone in the space near the first end cover 18 and a low-temperature zone in the space away from the first end cover 18. With the joint action of the insulation layer 17, the high-temperature zone is kept at a relatively constant temperature. The first end cover 18 also has a certain effect on reducing heat loss from the high-temperature zone. When the pushing mechanism 2 stops pushing the moving heating tube 14, the power to the moving heating tube 14 is simultaneously cut off. Under the elastic force of the spring 15, the moving heating tube 14 quickly rebounds to the low-temperature zone of the heating cylinder 11.

[0030] Please see Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 9 The pushing mechanism 2 includes a drive motor 21, a push rod 22, a connecting column 23, a Y-shaped bracket 24, a baffle groove 25, and a heat equalization unit 26. The output end of the drive motor 21 is fixedly provided with the push rod 22. When the push rod 22 rotates, it passes through the heating cylinder 11 through the clearance grooves 16 on both sides of the heating cylinder 11. The front end face of each of the three movable heating tubes 14 is fixedly provided with a connecting column 23. The three ends of the Y-shaped bracket 24 are fixedly connected to the three connecting columns 23. The side wall of the push rod 22 contacts the center of the Y-shaped bracket 24. The edge of the front opening of the heating cylinder 11 is fixedly provided with a baffle groove 25 that corresponds one-to-one with the three sides of the Y-shaped bracket 24. The rear end face of the center of the Y-shaped bracket 24 is provided with a heat equalization unit 26.

[0031] Continue reading Figure 2 , Figure 6 , Figure 7 and Figure 9The uniform heating unit 26 includes a V-shaped support frame 261, a fixing rod 262, a first gear 263, a first fan blade 264, a cylindrical rod 265, and a rack 266. The V-shaped support frame 261 is fixedly installed on the upper wall of the inner cylinder of the heating cylinder 11, and there are two V-shaped support frames 261, distributed front and back. The two sides of the V-shaped support frame 261 are located on both sides of the uppermost fixed heating tube 12. The lower end of the V-shaped support frame 261 is fixedly provided with two horizontal fixing rods 262. The two fixed rods 262 are distributed left and right, and a first gear 263 is rotatably arranged between the two fixed rods 262 via a rotating shaft. There are two first gears 263, and the two first gears 263 are distributed front and back. Multiple first fan blades 264 are fixedly arranged circumferentially on both ends of the rotating shaft and on the outer side of the two fixed rods 262. A cylindrical rod 265 is fixedly arranged on the central end face of the Y-shaped bracket 24. A rack 266 is fixedly arranged on the cylindrical rod 265, and the rack 266 meshes with the first gear 263.

[0032] In operation, the drive motor 21 is started, which drives the push rod 22 to rotate. The push rod 22 pushes the Y-shaped bracket 24 to move. The push rod 22 enters the heating cylinder 11 through the clearance groove 16 on the right side of the heating cylinder 11. The Y-shaped bracket 24 pushes the moving heating tube 14 to move. During the movement, the Y-shaped bracket 24 drives the rack 266 on the cylindrical rod 265 to mesh with the first gear 263 in the low-temperature zone. The rack 266 drives the first gear 263 in the low-temperature zone to rotate. The first gear 263 in the low-temperature zone drives the coaxial first fan blade 264 to rotate synchronously. The first fan blade 264 in the low-temperature zone rotates and agitates the hot air, making the air temperature in the low-temperature zone more uniform. The fiber yarn is initially and uniformly heated in the low-temperature zone. When the cylindrical rod 265 is pushed to the high-temperature zone, the rack 266 stops meshing with the first gear 263 in the low-temperature zone, and the rack 266 begins to mesh with the first gear 263 in the high-temperature zone. The rack 266 drives the high-temperature zone to rotate. The first gear 263 in the low-temperature zone rotates, and the first gear 263 in the high-temperature zone drives the first fan blade 264 on the same axis to rotate synchronously. The first fan blade 264 in the high-temperature zone rotates and stirs the hot air, making the air temperature in the high-temperature zone more uniform. The fiber yarn completes the final heating in the high-temperature zone. When one end of the push rod 22 rotates away from the center of the Y-shaped bracket 24, the compressed spring 15 will cause the moving heating tube 14 to rebound. The moving heating tube 14 drives the Y-shaped bracket 24 to rebound synchronously. During the rebound process, the rack 266 of the Y-shaped bracket 24 meshes with the first gear 263 in the high-temperature zone and the low-temperature zone in turn and drives the first gear 263 to rotate. When the three sides of the Y-shaped bracket 24 rebound into the stop groove 25, it stops. Under the rebound of the spring 15 and the limiting action of the stop groove 25, the Y-shaped bracket 24 and the moving heating tube 14 return to their original positions, and the push rod 22 leaves the heating cylinder 11 and separates from the Y-shaped bracket 24 through the clearance groove 16 on the left side of the heating cylinder 11.

[0033] Please see Figure 1 , Figure 3 and Figure 8 The cooling mechanism 3 includes a cooling cylinder 31, a second end cap 32, a second through hole 33, an air inlet 34, a desiccant 35, a ventilation mesh 36, an exhaust motor 37, and a second fan blade 38. The cooling cylinder 31 is located behind the heating mechanism 1. Second end caps 32 are fixedly installed on the edges of both the front and rear openings of the cooling cylinder 31. Second through holes 33 are opened on the second end caps 32, corresponding one-to-one with multiple first through holes 19. Ventilation holes are opened on the cylinder wall of the cooling cylinder 31. An air inlet 34 is fixedly installed on the outer wall of the cooling cylinder 31 at the position corresponding to the ventilation holes. A ventilation mesh 36 is fixedly installed inside each ventilation hole, flush with the inner and outer cylinder walls. The desiccant 35 is placed between two ventilation meshes 36. An exhaust motor 37 is fixedly installed at the end of the air duct 34 away from the ventilation hole. Multiple second-stage fan blades 38 are fixedly installed circumferentially at the output end of the exhaust motor 37. After the fiber yarn is heated in the heating cylinder 11, it enters the cooling cylinder 31. The exhaust motor 37 is started, which drives the multiple second-stage fan blades 38 to rotate rapidly. The second-stage fan blades 38 draw outside air into the air duct 34. The air enters the cooling cylinder 31 through the ventilation net 36. The desiccant 35 absorbs the small amount of water vapor in the air, so that the air is dry when it enters the cooling cylinder 31. This ensures a dry environment inside the cooling cylinder 31, which has a better cooling effect on the heated fiber yarn and helps to improve the forming quality of the fiber yarn.

[0034] Please see Figure 1 , Figure 3 and Figure 4 The winding mechanism 4 includes a second gear 41, a winding shaft 42, and winding spacers 43. There are two second gears 41, one of which is driven by an external motor, and the two second gears 41 mesh with each other. The winding shaft 42 is detachably mounted on the second gear 41, and multiple winding spacers 43 are fixedly mounted on the winding shaft 42. The gap between the two winding spacers 43 away from the second gear 41 corresponds to the two second through holes 33 located above, and the gap between the two winding spacers 43 close to the second gear 41 corresponds to the two second through holes 33 located below. After the fiber yarn has cooled down, it enters the winding mechanism 4. The external motor is started, which drives the two second gears 41 to mesh and rotate. The second gear 41 drives the winding shaft 42 to rotate, and the winding shaft 42 winds up the fiber yarn. When there is enough fiber yarn wound on the winding shaft 42, the winding shaft 42 is removed and a new winding shaft 42 is installed to continue winding up the fiber yarn.

[0035] Working principle: S1. First, fix one end of the fiber yarn to the take-up shaft 42 through the first through hole 19 and the second through hole 33 to make the yarn tensioned. Start the external motor to drive the take-up mechanism 4 to start working and start the exhaust motor 37.

[0036] S2. The fixed heating tube 12 is activated to heat the interior of the heating cylinder 11. When the temperature inside the heating cylinder 11 reaches the temperature of the fixed heating tube 12, the movable heating tube 14 is energized, and the drive motor 21 is activated simultaneously, causing the push rod 22 to rotate. The push rod 22 pushes the Y-shaped bracket 24 to move. The push rod 22 enters the heating cylinder 11 through the clearance groove 16 on the right side of the heating cylinder 11. The Y-shaped bracket 24 pushes the movable heating tube 14 to move. During the movement, the Y-shaped bracket 24 drives the rack 266 on the cylindrical rod 265 to mesh with the first gear 263 in the low-temperature zone. The rack 266 drives the first gear 263 in the low-temperature zone to rotate. In the high-temperature zone, gear 263 drives coaxial fan blade 264 to rotate synchronously. In the low-temperature zone, fan blade 264 rotates and agitates the hot air, making the air temperature in the low-temperature zone more uniform. The fiber yarn receives initial, uniform heating in the low-temperature zone. When cylindrical rod 265 is pushed to the high-temperature zone, rack 266 stops meshing with gear 263 in the low-temperature zone, and begins meshing with gear 263 in the high-temperature zone. Rack 266 drives gear 263 in the high-temperature zone to rotate, which in turn drives coaxial fan blade 264 to rotate synchronously. The fan blade 264 in the high-temperature zone agitates the hot air, making the air temperature in the high-temperature zone more uniform. The temperature becomes more uniform, and the fiber yarn completes its final heating in the high-temperature zone. The pushing mechanism 2 pushes the movable heating tube 14 towards the first end cap 18. Before the movable heating tube 14 contacts the spring 15, it moves rapidly. When the movable heating tube 14 contacts the spring 15, the spring 15 begins to be compressed, and the elastic force of the spring 15 increases as the movable heating tube 14 continuously compresses the spring 15. The moving speed of the movable heating tube 14 towards the first end cap 18 slows down. When one end of the pushing rod 22 rotates away from the center of the Y-shaped bracket 24, the pushing of the movable heating tube 14 stops, and the movable heating tube 14 is simultaneously deactivated. The compressed spring 15 causes the movable heating tube 14 to rebound, which in turn causes the Y-shaped bracket 24 to rebound synchronously. During the rebound, the rack 266 of the Y-shaped bracket 24 meshes with the first gear 263 of the high-temperature zone and the low-temperature zone in sequence, driving the first gear 263 to rotate and re-uniform the air temperature. When the three sides of the Y-shaped bracket 24 rebound into the stop groove 25, it stops. Under the rebound of the spring 15 and the limiting action of the stop groove 25, the Y-shaped bracket 24 and the movable heating tube 14 return to their original positions. The push rod 22 leaves the heating cylinder 11 through the clearance groove 16 on the left side of the heating cylinder 11, waiting for the push rod 22 to push the Y-shaped bracket 24 again.

[0037] S3. After the fiber yarn is heated in the heating cylinder 11, it enters the cooling cylinder 31. The exhaust motor 37 drives multiple second fan blades 38 to rotate rapidly. The second fan blades 38 draw air into the air inlet duct 34. Before the air enters the cooling cylinder 31 through the ventilation net 36, the desiccant 35 absorbs a small amount of water vapor in the air, so that the air is dry when it enters the cooling cylinder 31. At this time, the dry air cools the heated fiber yarn.

[0038] S4. After the fiber yarn has cooled down, it enters the winding mechanism 4. The second gear 41 drives the winding shaft 42 to rotate. The winding shaft 42 winds up the fiber yarn. When there is enough fiber yarn wound on the winding shaft 42, the winding shaft 42 is removed and replaced with a new winding shaft 42 to continue winding up the fiber yarn.

[0039] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; 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; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A heating device for producing carbon fiber prepreg yarn, characterized in that: The heating device includes a heating mechanism, a pushing mechanism, a cooling mechanism, and a winding mechanism. The pushing mechanism is located in front of the heating mechanism, the cooling mechanism is located behind the heating mechanism, and the winding mechanism is located behind the cooling mechanism. The heating mechanism includes a heating cylinder, fixed heating tubes, guide grooves, movable heating tubes, and clearance grooves, a first end cap, and a first through hole. The heating cylinder is a horizontally placed cylindrical structure with open ends. Three fixed heating tubes are circumferentially distributed on the inner wall of the heating cylinder, and three guide grooves are also circumferentially distributed on the inner wall of the heating cylinder. The three guide grooves and the three fixed heating tubes are distributed alternately. A movable heating tube is slidably installed inside each of the three guide grooves. Clearance grooves are provided on both the left and right sides of the heating cylinder. A first end cap is fixedly installed on the edge of the rear opening of the heating cylinder, and multiple first through holes are provided on the first end cap. The pushing mechanism includes a drive motor, a push rod, a connecting column, a Y-shaped bracket, a baffle groove, and a heat equalization unit. The output end of the drive motor is fixedly equipped with a push rod. Each of the three movable heating tubes has a connecting column fixedly installed on its front end face. The three ends of the Y-shaped bracket are fixedly connected to the three connecting columns. The side wall of the push rod contacts the center of the Y-shaped bracket. A baffle groove corresponding to the three sides of the Y-shaped bracket is fixedly installed at the edge of the front opening of the heating cylinder. A heat equalization unit is installed on the rear end face at the center of the Y-shaped bracket. The pushing mechanism and the spring work together to make the speed of the moving heating tube decrease from fast to slow when it moves from the front end of the heating cylinder to the rear end of the heating cylinder, and the speed of the moving heating tube also decreases from fast to slow when it returns from the rear end of the heating cylinder to the front end of the heating cylinder. This creates a high-temperature zone in the space near the No. 1 end cap and a low-temperature zone in the space away from the No. 1 end cap. The fiber yarn passes through the inside of the heating mechanism, passes through the low-temperature zone for preheating, the high-temperature zone for heating, and then reaches the cooling mechanism for cooling. Finally, the winding mechanism winds up the fiber yarn. The heating mechanism also includes a spring and an insulation layer. The spring is set in the guide groove. One end of the spring is fixedly connected to the No. 1 end cap. There is a gap between the other end of the spring and the movable heating tube. An insulation layer is wrapped on the outer cylinder wall near the rear end of the heating cylinder. The uniform heating unit includes a V-shaped support frame, a fixed rod, a first gear, a first fan blade, a cylindrical rod, and a rack. The V-shaped support frame is fixedly installed on the upper wall of the inner cylinder of the heating cylinder, and there are two V-shaped support frames, which are arranged front and back. The two sides of the V-shaped support frame are respectively located on both sides of the uppermost fixed heating tube. A horizontal fixed rod is fixedly installed at the lower end of the V-shaped support frame. There are two fixed rods, which are arranged left and right. A first gear is rotatably installed between the two fixed rods through a rotating shaft. There are two first gears, which are arranged front and back. Multiple first fan blades are fixedly installed circumferentially at both ends of the rotating shaft and on the outer side of the two fixed rods. The cylindrical rod is fixedly installed on the central end face of the Y-shaped bracket. A rack is fixedly installed on the cylindrical rod, and the rack meshes with the first gear.

2. The heating device for producing carbon fiber prepreg yarn according to claim 1, characterized in that: The cooling mechanism includes a cooling cylinder, a second end cap, a second through hole, an air inlet duct, and a ventilation mesh. The cooling cylinder is located behind the heating mechanism. The second end cap is fixedly installed on the edges of both the front and rear openings of the cooling cylinder. The second end cap has a second through hole that corresponds to and penetrates multiple first through holes. Ventilation holes are provided on the cylinder wall of the cooling cylinder. An air inlet duct is fixedly installed on the outer wall of the cooling cylinder at the position corresponding to the ventilation hole. A ventilation mesh is fixedly installed in each ventilation hole at a position flush with the inner and outer cylinder walls.

3. The heating device for producing carbon fiber prepreg yarn according to claim 2, characterized in that: The cooling mechanism also includes a desiccant, an exhaust motor, and a second fan blade. The desiccant is placed between two ventilation screens. An exhaust motor is fixedly installed at the end of the air inlet duct away from the ventilation hole. Multiple second fan blades are fixedly installed circumferentially at the output end of the exhaust motor.

4. The heating device for producing carbon fiber prepreg yarn according to claim 1, characterized in that: The winding mechanism includes a second gear, a winding shaft, and winding spacers. There are two second gears, and the two second gears mesh with each other. The winding shaft is detachably mounted on the second gear, and multiple winding spacers are fixedly mounted on the winding shaft. The gap between the two winding spacers away from the second gear corresponds to the two second through holes located above, and the gap between the two winding spacers close to the second gear corresponds to the two second through holes located below.

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