Cleaning and recycling method for carbon fiber cutting

Abstract

The present application provides a kind of cleaning and recycling method for carbon fiber cutting: including cleaning collection method and recycling method;The cleaning collection method includes: by the air waste collection device, the free carbon fiber particle waste generated in air during the cutting of raw material by carbon fiber cutting equipment is collected and stored in the dust collection bag;By the cleaning collection device, the adherent carbon fiber particle waste attached to the inner wall surface of the equipment after the cutting of raw material by carbon fiber cutting equipment is flushed and collected into the waste collection bag;The recycling method includes: the dust collection bag and waste collection bag stored with carbon fiber particle waste are put into solvent together for soaking, so that carbon fiber particle waste is decomposed into carbon fiber and resin, so that the dust collection bag and waste collection bag are decomposed into resin, and finally carbon fiber and resin are recycled respectively.The technical problem that existing cleaning and recycling device cannot recycle and utilize the scattered waste generated after carbon fiber cutting is solved.

Description

Technical Field

[0001] This invention relates to the field of waste recycling technology, and in particular to a cleaning and recycling method for carbon fiber cutting. Background Technology

[0002] Carbon fiber composites are widely used in aerospace, automotive manufacturing, and wind power equipment due to their excellent mechanical properties and lightweight characteristics. Their main components are carbon fiber and resin matrix. Taking carbon fiber sheets or carbon fiber fabrics as an example, although laser cutting can achieve high-precision processing, the resin matrix is ​​prone to local vaporization under high temperature, producing micron-sized particulate dust (floating waste) and incompletely decomposed composite material at the cutting edge (residual waste).

[0003] Currently, only the excess waste after cutting is recycled. As for the loose waste, it usually floats in the air. However, since the laser cutting device is equipped with an outer shell, the remaining waste will stick to the inside of the shell, except for the waste that eventually falls back to the ground. This loose waste is usually only cleaned, and the wastewater after cleaning is not treated again and recycled.

[0004] In existing technologies, the recycling of such waste mainly relies on two types of methods: physical separation and chemical separation. Physical separation typically achieves the initial separation of carbon fibers and resin through mechanical crushing, sieving, or air classification. However, this method is difficult to completely remove resin residues and is prone to carbon fiber breakage or surface damage during processing, resulting in a significant decrease in the mechanical properties of the recycled products. Chemical separation employs processes such as high-temperature pyrolysis, solvent dissolution, or strong acid / alkali catalysis. For example, it uses supercritical fluids or reagents such as nitric acid to decompose the resin matrix to achieve carbon fiber stripping. However, these methods generally suffer from high energy consumption, harsh reaction conditions, complex by-product treatment, and may release harmful gases or generate large amounts of wastewater, causing secondary pollution to the environment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a cleaning and recycling method for carbon fiber cutting, which solves the technical problem that existing cleaning and recycling devices cannot recycle and utilize the scattered waste generated after carbon fiber cutting.

[0006] According to an embodiment of the present invention, a cleaning and recycling method for carbon fiber cutting is described: a cleaning and recycling device is used, the cleaning and recycling device including an air waste collection device and a cleaning collection device disposed on the carbon fiber cutting equipment;

[0007] The cleaning and collection device is equipped with a waste collection bag, and a water tank is provided outside the waste collection bag. The water tank is connected to the cleaning and collection device. The air waste collection device is equipped with a dust collection bag. Both the dust collection bag and the waste collection bag are made of resin material through spinning and weaving.

[0008] The cleaning and recycling method includes a cleaning and collection method and a recycling method;

[0009] The cleaning and collection method includes:

[0010] The air waste collection device collects free carbon fiber particles generated in the air during the cutting process of carbon fiber cutting equipment and stores them in the dust collection bag.

[0011] The cleaning and collection device washes away the adhesive carbon fiber particles that adhere to the inner wall of the carbon fiber cutting equipment after the raw materials are cut, and collects them into the waste collection bag.

[0012] The recycling method includes: immersing a dust collection bag and a waste collection bag filled with carbon fiber particle waste together in a solvent to decompose the carbon fiber particle waste into carbon fiber and resin, and to decompose the dust collection bag and the waste collection bag into resin, and finally recycling the carbon fiber and resin separately.

[0013] The technical principle of this invention is as follows:

[0014] (1) When the carbon fiber cutting equipment is working, turn on the vacuum cleaner to collect the smallest carbon fiber waste particles floating in the air into the dust collection bag. Of course, there will also be some dust and other particles in the air. This can make the air in the working space of the carbon fiber cutting equipment fresher and prevent the operator from inhaling a large amount of carbon fiber particles when operating the carbon fiber cutting equipment. Inhaling too many particles will affect the operator's health and may lead to respiratory diseases such as pneumoconiosis, rhinitis, and pharyngitis in severe cases.

[0015] (2) Finally, after the carbon fiber cutting equipment has finished working, or after a batch of carbon fiber cutting has been completed, turn on the cleaning and collection device to wash the carbon fiber particles adhering to the side wall and remaining free in the air inside the carbon fiber cutting equipment to the bottom of the carbon fiber cutting equipment. Then, discharge these carbon fiber wastes into the waste collection bag, while the water directly passes through the waste collection bag and enters the water tank. Because both the dust collection bag and the waste collection bag are made of resin material through spinning and weaving, they form a filter structure that can retain carbon fiber particles in the dust collection bag and the waste collection bag, while water and air can pass through and be discharged.

[0016] (3) After the cleaning and collection of carbon fiber waste is completed, the dust collection bag and waste collection bag are removed together with the resin dust collection bag and waste collection bag for subsequent separation of carbon fiber and resin. That is, there is no need to open the dust collection bag and waste collection bag, which avoids the carbon fiber waste particles inside from being dispersed into the air again, improves the recycling rate of carbon fiber waste, and helps to ensure the air quality of the entire factory.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention utilizes an air waste collection device and a cleaning collection device installed on carbon fiber cutting equipment to recycle particulate, airborne waste. It solves the technical problem that existing cleaning and recycling devices cannot recycle airborne waste generated after carbon fiber cutting. Simultaneously, while recycling carbon fiber waste, it also removes other dust from the factory space, helping to optimize air quality and ensure overall air quality in the processing environment. The aforementioned cleaning and collection method can maximize the recovery of carbon fiber particulate waste in the entire processing environment. Combined with the recovery of residual waste, the recovery rate can reach 99.5%-99.8%, with the remainder consisting of vaporized waste from laser cutting and waste that has drifted from channels or gaps. This recycling method works in conjunction with the cleaning and collection method, decomposing the resin dust and waste collection bags together to prevent carbon fiber waste from drifting into the air. The separated resin can then be used to remanufacture dust and waste collection bags for reuse.

[0019] Furthermore, in the cleaning and collection method, the air waste collection device also includes a suction head and a vacuum cleaner connected to the suction head pipe. The suction head is installed inside the carbon fiber cutting equipment, and the dust collection bag is installed inside the vacuum cleaner. During collection, the vacuum cleaner works to suck in the free carbon fiber particles in the air from the suction head and finally store them in the dust collection bag.

[0020] This technical solution allows for the collection of free carbon fiber particles during the operation of the carbon fiber cutting equipment, preventing them from scattering, thus helping to optimize the air quality of the factory and ensuring the recycling rate of carbon fiber waste.

[0021] Furthermore, in the cleaning and collection method, the carbon fiber cutting equipment includes a laser cutting device and a housing outside the laser cutting device. The bottom of the housing is provided with an inclined plate, and the middle of the inclined plate is provided with a rotating shaft. The rotating shaft is connected to an inclined motor. The two ends of the inclined plate are respectively provided with liquid outlets. One of the liquid outlets is connected to a coolant recovery tank, and the other liquid outlet is connected to a water tank. The left and right rotation of the inclined plate can switch the two liquid outlets to the lowest position respectively.

[0022] In this technical solution, two liquid outlets are set at the bottom, and the liquid can be controlled to enter which outlet through a rotating shaft and a tilting motor. During processing, the coolant flows into the coolant recovery tank for circulation; during cleaning, carbon fiber particles enter the waste collection bag, and water passes through the waste collection bag into the water tank for circulation.

[0023] Furthermore, in the cleaning and collection method, the cleaning and collection device also includes nozzles evenly distributed on the top of the housing and a water pump connected to all the nozzles. The water pump is connected to a water tank, and the top of the water tank is connected to a liquid outlet via a pipeline. The waste collection bag is located inside the water tank and installed on the pipeline connected to the liquid outlet.

[0024] The working method of the cleaning and collection device in the cleaning and collection method is as follows:

[0025] After the carbon fiber cutting equipment completes the processing, the inclined plate tilts towards the outlet of the water tank. Then, the nozzle of the cleaning and collection device is turned on, allowing water to spray out from the top of the shell. This washes the carbon fiber waste particles adhering to the side wall of the shell and the remaining free carbon fiber particles in the air onto the inclined plate, and finally flows out from the outlet. The carbon fiber waste particles that flow out enter the waste collection bag, while the water passes through the waste collection bag and enters the water tank.

[0026] In this technical solution, the nozzle is set at the top, which can wash all the carbon fiber waste floating inside the shell that has not been sucked up by the vacuum cleaner, as well as the carbon fiber waste on the shell and the laser cutting device, onto the inclined plate, ensuring the recycling rate of carbon fiber waste.

[0027] Furthermore, in the cleaning and collection method, the cleaning and recycling device also includes a waste crushing and recycling device installed at the waste outlet of the carbon fiber cutting equipment. The waste crushing and recycling device includes a shell and a crushing roller installed inside the shell. The crushing roller is driven by a crushing motor. A discharge pipe is provided at the bottom of the shell. The discharge pipe is connected to a water tank. The waste collection bag is installed on the discharge pipe inside the water tank.

[0028] The cleaning and collection method also includes;

[0029] After processing, large pieces of waste are discharged from the waste outlet and fall into the waste crushing and recycling device, where they are crushed into small pieces of carbon fiber waste and fall into the waste collection bag.

[0030] In this technical solution, after a piece of carbon fiber is cut, the largest block of carbon fiber waste is removed from the waste outlet of the carbon fiber cutting equipment and enters the waste crushing and recycling device. After being crushed by the waste crushing and recycling device, it forms small pieces of carbon fiber waste, which are eventually stored in the waste collection bag. During the crushing process, granular carbon fiber waste is also generated. The crushed waste is directly discharged into the discharge pipe and eventually enters the waste collection bag, which can prevent the granular carbon fiber waste from being dispersed in the air again.

[0031] Furthermore, in the cleaning and recycling method, both the dust collection bag and the waste collection bag include a resin bag body and an elastic resin ring set on the resin bag body. The resin bag body is made of resin material through spinning and weaving. The top of the resin bag body is provided with an inlet. The elastic resin ring is tied and fixed at the inlet. The inlet is connected to an air waste collection device or a cleaning collection device.

[0032] In this technical solution, once the dust collection bag and waste collection bag are full of carbon fiber waste, they can be tied tightly with elastic resin rings to prevent the internal carbon fiber waste from scattering again.

[0033] Furthermore, in the recycling method, the cleaning and recycling device also includes an external ultrasonic decomposition box, the top of which is equipped with an ultrasonic device that can be raised and lowered, and the bottom of which is connected to a centrifuge.

[0034] The recycling method includes the following steps:

[0035] S1. Place the dust collection bag and waste collection bag filled with carbon fiber waste into the ultrasonic decomposition chamber, and soak them in solvent inside the ultrasonic decomposition chamber.

[0036] S2. After completing step S1, an ultrasonic device is used to enter the solvent, and then the ultrasonic device performs ultrasonic vibration separation to accelerate the separation of carbon fiber and resin.

[0037] S3. Centrifugal filtration: The solvent from step S2 is discharged into a centrifuge, and then the centrifuge is started to separate the liquid inside. The final mixture consists of carbon fiber at the bottom, resin in the middle, and pure solution at the top.

[0038] S4. Separation: Take out and store the mixture containing carbon fiber and the mixture containing resin separately.

[0039] In this technical solution, an acetone solution is placed inside an ultrasonic decomposition chamber to decompose the dust collection bag, waste collection bag, and the carbon fiber waste inside. The decomposition is accelerated by an ultrasonic device. Finally, a centrifuge is used to separate the carbon fiber and resin materials into layers: carbon fiber at the bottom, resin in the middle, and clear acetone solution at the top. This recycling method uses solvent immersion combined with ultrasonic vibration to accelerate the separation of resin and carbon fiber, increasing the separation efficiency by 50%.

[0040] It should be noted that both carbon fiber and resin contain dust, which needs to be separated during subsequent use. The separation method is conventional, such as centrifugation and filtration, and therefore is not mentioned in the recycling method application.

[0041] Furthermore, in the recycling method, the centrifuge is equipped with a carbon fiber siphon tube, and the carbon fiber siphon tube is equipped with a check valve. One end of the carbon fiber siphon tube is located at the bottom of the centrifuge, and the other end is connected to a carbon fiber storage tank. In step S4, the carbon fiber siphon tube is opened to discharge the mixture containing carbon fiber into the carbon fiber storage tank for storage.

[0042] Furthermore, in the recycling method, the centrifuge is equipped with a resin siphon tube, which has a check valve. One end of the resin siphon tube is located in the middle of the centrifuge, and the other end is connected to a resin storage tank. In step S4, the resin siphon tube is opened to discharge the resin-containing mixture into the resin storage tank for storage.

[0043] In this technical solution, by setting up carbon fiber siphon tubes and resin siphon tubes, the siphon principle can be used to discharge and separate the mixture containing carbon fiber and the mixture containing resin without consuming energy.

[0044] Furthermore, the recycling method also includes the following steps:

[0045] S5. After completing step S4, dry the solutions in the carbon fiber storage box and the resin storage box respectively, and condense the dried gas to re-form a pure solvent; after drying, the carbon fiber remaining in the carbon fiber storage box is carbon fiber, and the resin remaining in the resin storage box is resin.

[0046] In this technical solution, after drying, a pure solvent can be obtained again, and the carbon fiber and resin can be separated at the same time, achieving pollution-free recycling. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the cleaning and recycling device for carbon fiber cutting according to Embodiment 1 of the present invention.

[0048] Figure 2This is a bottom view of the inclined plate in Embodiment 1 of the present invention.

[0049] Figure 3 This is a top view of the laser cutting device according to Embodiment 1 of the present invention.

[0050] Figure 4 This is a top view of the material conveying mechanism of Embodiment 1 of the present invention.

[0051] Figure 5 This is a schematic diagram of the pipeline connection structure of the cleaning and recycling device in Embodiment 1 of the present invention.

[0052] Figure 6 This is a schematic diagram of the waste collection bag structure of Embodiment 1 of the present invention.

[0053] Figure 7 This is a schematic diagram of the pipeline connection structure of the cleaning and recycling device in Embodiment 2 of the present invention.

[0054] Figure 8 This is a schematic diagram of the inclined plate connection structure in Embodiment 3 of the present invention.

[0055] Figure 9 This is a schematic diagram of the ultrasonic decomposition box structure in Embodiment 4 of the present invention.

[0056] In the above figures: 1. Laser cutting device; 11. Three-axis drive device; 111. X-axis electric slide rail; 112. Y-axis electric slide rail; 113. Z-axis electric push rod; 12. Laser emitter; 13. Conveying worktable; 131. Roller; 132. Conveyor belt; 133. Support roller; 14. Material distribution and conveying mechanism; 141. Conveying roller; 142. Conveying bar; 15. Storage box; 16. Conveying structure; 2. Outer shell; 201. Inlet and outlet; 21. Inclined plate; 211. Rotating shaft; 212. Inclined motor; 213. Flanging; 214. Liquid outlet; 215. Counterweight; 216. Electromagnet; 22. Frame; 23. Air waste collection device; 231. Suction head; 232. Vacuum cleaner; 233. Dust collection bag; 24. Cleaning and collecting... 241. Collection device; 242. Nozzle; 243. Water pump; 25. Waste crushing and recycling device; 251. Shell; 252. Crushing roller; 253. Crushing motor; 254. Discharge pipe; 255. Dust cover; 3. Coolant recovery tank; 31. Cooling system; 311. Cooling head; 4. Water tank; 41. Waste collection bag; 411. Resin bag body; 412. Elastic resin ring; 413. Cable tie; 414. Inlet; 42. Flip cover; 43. Support rail; 44. Connection port; 45. Solenoid valve; 5. Ultrasonic decomposition box; 51. Hook; 6. Ultrasonic device; 61. Support frame; 62. Electric actuator; 7. Centrifuge; 71. Check valve; 72. Carbon fiber siphon tube; 73. Resin siphon tube; 74. Carbon fiber storage box; 75. Resin storage box. Detailed Implementation

[0057] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0058] Example 1

[0059] like Figure 1 The cleaning and recycling device shown is for carbon fiber cutting and is installed on the carbon fiber cutting equipment.

[0060] like Figure 1-2 As shown, the carbon fiber cutting equipment includes a laser cutting device 1 and a housing 2 set outside the laser cutting device 1. The bottom of the housing 2 is provided with an inclined plate 21, and a rotating shaft 211 is installed in the middle of the inclined plate 21. The rotating shaft 211 is connected to a tilting motor 212. Specifically, the housing 2 is supported by a frame 22, that is, the housing 2, the inclined plate 21 and the tilting motor 212 are all installed on the frame 22.

[0061] like Figure 1 , 3 The carbon fiber cutting equipment includes a three-axis drive unit 11, a laser emitter 12 mounted on the three-axis drive unit 11, and a conveying worktable 13 located below the three-axis drive unit 11. The outer casing 2 is provided with inlets and outlets 201 at both ends of the conveying worktable 13. A material distribution and conveying mechanism 14 is provided at one inlet and outlet 201 of the outer casing 2. A storage box 15 is provided below the material distribution and conveying mechanism 14. The end of the material distribution and conveying mechanism 14 away from the outer casing 2 is provided as a waste outlet. A conveying structure 16 is provided at the other inlet and outlet 201 of the outer casing 2 for feeding carbon fiber materials into the carbon fiber cutting equipment for cutting.

[0062] like Figure 1 , 3 As shown, the three-axis drive device 11 of this application includes two X-axis electric slide rails 111 mounted on the housing 2, a Y-axis electric slide rail 112 mounted on the sliders of the two X-axis electric slide rails 111, and a Z-axis electric push rod 113 mounted on the slider of the Y-axis electric slide rail 112. A laser emitting head 12 is provided on the push rod of the Z-axis electric push rod 113.

[0063] like Figure 1 As shown, the conveyor worktable 13 includes two rollers 131 mounted on the outer casing 2. One of the rollers 131 is connected to a motor, and the two rollers 131 are connected to a conveyor belt 132. Support rollers 133 are evenly distributed between the two rollers 131.

[0064] like Figure 1 , 4As shown, the material conveying mechanism 14 includes two conveying rollers 141 mounted on the frame 22. One conveying roller 141 is connected to a motor, and multiple conveying strips 142 are connected between the two conveying rollers 141. There is a gap between adjacent conveying strips 142 to facilitate the cut material to fall into the storage box 15, while the waste material remains on the conveying strips 142 and eventually falls out from the waste outlet. When changing to different batches of cut materials with different sizes and positions, it is only necessary to adjust the size of the gap between the conveying strips 142 and the number of conveying strips 142 to ensure that one gap is aligned with a row of cut materials.

[0065] If you want to save the step of adjusting the conveyor bar 142, you can directly design the structure of the material distribution and conveying mechanism 14 as a conventional conveyor belt structure, such as the conveying workbench 13, and then set a robot arm on one side to identify and grab the cut materials and put them into the storage box 15. This can ensure that the material distribution and conveying mechanism 14 is suitable for cutting materials of different sizes and positions in different batches. However, such a design will lead to a significant increase in cost.

[0066] like Figure 1 As shown, the cleaning and recycling device includes an air waste collection device 23 and a cleaning collection device 24 installed on the outer casing 2, and a waste crushing and recycling device 25 installed at the waste outlet of the carbon fiber cutting equipment.

[0067] like Figure 1-2 As shown, the inclined plate 21 has an integrally formed flange 213 on its edge, which wraps around the outer side of the bottom of the outer shell 2. The inclined plate 21 has liquid outlets 214 at both ends. One liquid outlet 214 is connected to a coolant recovery tank 3, which is connected to a cooling system 31. The cooling system 31 includes structures such as filters and pumps. The cooling system 31 has a cooling head 311 inside one side of the laser emitting head 12 for spraying coolant. The other liquid outlet 214 is connected to a cleaning and collection device 24.

[0068] like Figure 1 , 5 As shown, the cleaning and collection device 24 includes nozzles 241 evenly distributed on the top of the housing 2 and a water pump 242 connected to all nozzles 241. The water pump 242 is connected to a water tank 4. The top of the water tank 4 is connected to an outlet 214 by a pipeline. A waste collection bag 41 is provided at the pipeline connected to the outlet 214 inside the water tank 4. Specifically, an openable flip cover 42 is provided on one side of the top of the water tank 4. A support rail 43 is provided at the place where the waste collection bag 41 is placed in the water tank 4. A connection port 44 is provided on the side of the water tank 4 below the support rail 43 and away from the support rail 43. The connection port 44 is used to connect the water pump 242.

[0069] like Figure 1 , 5As shown, the waste crushing and recycling device 25 includes a housing 251 and a crushing roller 252 installed inside the housing 251. The crushing roller 252 is connected to a crushing motor 253. A discharge pipe 254 is provided at the bottom of the housing 251. The discharge pipe 254 is connected to a water tank 4. The discharge pipe 254 is connected to a waste collection bag 41 inside the water tank 4. A dust cover 255 is provided at the top of the housing 251. The dust cover 255 has an opening facing the waste outlet to ensure that carbon fiber particles cannot be dispersed into the air.

[0070] like Figure 1 , 5 As shown, the air waste collection device 23 includes a suction head 231 and a vacuum cleaner 232 connected to the suction head 231. The suction head 231 is installed inside the carbon fiber cutting equipment, and the vacuum cleaner 232 is equipped with a dust collection bag 233. Specifically, the suction heads 231 are evenly distributed on both sides of the inner shell 2, and the suction heads 231 are inclined at a 40-50° angle to the side of the outer shell 2.

[0071] like Figure 6 As shown, both the dust collection bag 233 and the waste collection bag 41 include a resin bag body 411 and an elastic resin ring 412 disposed on the resin bag body 411. The resin bag body 411 is made of spun and woven resin material. The top of the resin bag body 411 is provided with an inlet 414. The elastic resin ring 412 is tightly fixed at the inlet 414. A cable tie 413 is provided between the inlet of the dust collection bag 233 and the pipe connecting the suction head 231 for fixation. The inlet of the waste collection bag 41... A cable tie 413 is provided between the pipe connecting the outlet 414 and the liquid outlet 214 and the discharge pipe 254 for fixing. Of course, the pipe connecting the liquid outlet 214 and the discharge pipe 254 can be combined into one pipe and connected to the inlet 414 of the waste collection bag 41. When it is necessary to replace the dust collection bag 233 and the waste collection bag 41, the cable tie 413 is untied and the dust collection bag 233 and the waste collection bag 41 are pulled down directly. At this time, the elastic resin ring 412 will automatically tighten and tie the inlet 414.

[0072] The specific resin bag body 411 includes two outer filter layers and an inner filter layer disposed between the two outer filter layers. The inner filter layer is made by melt-blowing, while the outer filter layer is made by machine-woven plain weave. Then, the outer filter layers are placed on both sides of the inner filter layer, and it is necessary to ensure that the two outer filter layers are inclined at 45 degrees. Then, a hot press is used to heat and then press down slightly, so that the inner filter layer is integrated into the gap of the outer filter layer.

[0073] The resin needs to be heated to a point where it softens; the specific temperature should be adjusted according to the actual resin temperature. Then, the pressure drop should be controlled to be less than the sum of the thicknesses of the inner filter layer and the two outer filter layers, but greater than the sum of the thicknesses of the two outer filter layers. Because the inner filter layer fibers are finer, approximately 1-5 μm, they deform faster under pressure than the outer fibers. The fibers within the gaps of the outer filter layers, however, do not deform but instead fill the gaps, forming a unified structure.

[0074] The resin bag 411 used in this application has excellent strength and is not easily damaged during transportation. At the same time, after the inner filter layer is integrated into the gaps of the outer filter layer, it can block most of the micron-sized carbon fiber particles. Specifically, it can block particles of 5μm and above, while larger particles of 50μm and above will be blocked by the gaps of the original outer filter layer.

[0075] The cleaning and collection methods of the cleaning and recycling device for carbon fiber cutting include:

[0076] During processing: The vacuum cleaner 232 works to suck up the free carbon fiber particle waste in the air from the suction head 231 and finally store it in the dust collection bag 233, which will collect most of the carbon fiber particle waste and some dust.

[0077] After processing is complete, the inclined plate 21 tilts towards the outlet 214 connected to the water tank, and then the nozzle 241 of the cleaning and collection device 24 is turned on, allowing water to spray out from the top of the outer shell 2. This washes the carbon fiber waste particles adhering to the side wall of the outer shell 2 and the remaining free carbon fiber particles in the air onto the inclined plate 21, and finally flows out from the outlet 214. The outflowing carbon fiber waste particles enter the waste collection bag 41, while the water passes through the waste collection bag 41 into the water tank 4. Because the resin bag body 411 of the waste collection bag 41 is made of resin material spun and woven, it has microscopic pores, which can block the carbon fiber waste particles while allowing water to pass through into the water tank 4. Here, "after processing is complete" refers to a certain processing time, such as 5 days, during which a cleaning is performed.

[0078] After processing: large pieces of waste are discharged from the waste outlet and fall into the waste crushing and recycling device 25, where they are crushed into small pieces of carbon fiber waste and fall into the waste collection bag 41.

[0079] Once the waste collection bag 41 and dust collection bag 233 are full of carbon fiber waste, they are directly replaced with new waste collection bags 41 and dust collection bags 233. The full waste collection bags 41 and dust collection bags 233 are directly stored or recycled.

[0080] Example 2

[0081] like Figure 7As shown, the difference between this embodiment and embodiment 1 is that the water pump 242 is also connected to the waste crushing and recycling device 25 through a pipeline. A solenoid valve 45 is provided between the water pump 242, the waste crushing and recycling device 25 and the nozzle 241 to control the flow of water, that is, the waste crushing and recycling device 25 can be cleaned at regular intervals.

[0082] Example 3

[0083] like Figure 8 As shown, the difference between this embodiment and embodiment 1 or 2 is that the tilting plate 21 does not have a tilting motor 212. The tilting plate 21 has a counterweight 215 near the outlet 214 of the coolant recovery tank 3. An electromagnet 216 is provided on the upper side of the counterweight 215. During normal cutting, the electromagnet 216 is not energized, and the tilting plate 21 naturally tilts to one side of the counterweight 215. When cleaning is required, the electromagnet 216 is energized, so that the electromagnet 216 attracts the counterweight 215, and the tilting plate 21 tilts to the other side.

[0084] Example 4

[0085] like Figure 9 As shown, the difference between this embodiment and any one of embodiments 1-3 is that the cleaning and recycling device also includes an external ultrasonic decomposition box 5. The top of the ultrasonic decomposition box 5 is equipped with an ultrasonic device 6 that can be raised and lowered. Specifically, the ultrasonic decomposition box 5 has hooks 51 evenly distributed on its side. The waste collection bag 41 and the dust collection bag 233 are directly hung on the hooks 51. The suspension method is a destructive penetrating hook. A support frame 61 is provided between the ultrasonic device 6 and the ultrasonic decomposition box 5. An electric push rod 62 is provided on the support frame 61. The ultrasonic device 6 is installed on the electric push rod 62, which can drive the ultrasonic device 6 to be immersed in the ultrasonic decomposition box 5. The ultrasonic decomposition box 5 contains a solvent, such as acetone.

[0086] like Figure 9 As shown, the bottom pipeline of the ultrasonic decomposition chamber 5 is connected to a centrifuge 7. A check valve 71 needs to be installed on the pipeline. A carbon fiber siphon tube 72 and a resin siphon tube 73 are installed inside the centrifuge 7. Both the carbon fiber siphon tube 72 and the resin siphon tube 73 are equipped with check valves 71 to control the liquid output of the carbon fiber siphon tube 72 and the resin siphon tube 73. One end of the carbon fiber siphon tube 72 is located at the bottom of the centrifuge 7, and one end of the resin siphon tube 73 is located in the middle of the centrifuge 7. The carbon fiber siphon tube 72 is connected to a carbon fiber storage tank 74, and the resin siphon tube 73 is connected to a resin storage tank 75.

[0087] The recycling method for the cleaning and recycling device used for carbon fiber cutting includes the following steps:

[0088] S1. Place the dust collection bag 233 and waste collection bag 41, which are filled with carbon fiber waste, into the ultrasonic decomposition chamber 5. Place acetone as a solvent in the ultrasonic decomposition chamber 5 and soak the dust collection bag 233 and waste collection bag 41 in the solvent for 6-12 hours. Stir manually once every 2 hours to promote resin swelling.

[0089] S2. After completing step S1, the ultrasonic device 6 descends into the solvent and then performs ultrasonic oscillation separation to accelerate the separation of carbon fiber and resin. Specifically, the ultrasonic power is 100-150 W and the frequency is controlled at 20-40 kHz to effectively dislodge the resin. The duration is controlled at 10-15 minutes to avoid damaging the carbon fiber.

[0090] S3. Centrifugal Filtration: The solvent from step S2 is discharged into centrifuge 7. Then, centrifuge 7 is started to centrifuge and separate the liquid inside. The final mixture consists of carbon fiber at the bottom, resin in the middle, and pure acetone solution at the top. The specific centrifugation speed is controlled at 3000-5000 rpm and the time is controlled at 3-5 minutes.

[0091] S4. Separation: Simultaneously open the carbon fiber siphon 72 and the resin siphon 73 to discharge the mixture containing carbon fiber into the carbon fiber storage tank 74 and the mixture containing resin into the resin storage tank 75, thereby achieving the separation of resin and carbon fiber.

[0092] S5. Drying: After completing step S4, the solutions in carbon fiber storage box 74 and resin storage box 75 are dried respectively, and the dried gas is condensed to re-form a pure solvent; after drying, carbon fiber remains in carbon fiber storage box 74, and resin remains in resin storage box 75.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for cleaning and recycling carbon fiber used in cutting, characterized in that: For a cleaning and recycling device, the cleaning and recycling device includes an air waste collection device and a cleaning collection device installed on the carbon fiber cutting equipment; The cleaning and collection device is equipped with a waste collection bag, and a water tank is provided outside the waste collection bag. The water tank is connected to the cleaning and collection device. The air waste collection device is equipped with a dust collection bag. Both the dust collection bag and the waste collection bag are made of resin material through spinning and weaving. The cleaning and recycling method includes a cleaning and collection method and a recycling method; The cleaning and collection method includes: The air waste collection device collects free carbon fiber particles generated in the air during the cutting process of carbon fiber cutting equipment and stores them in the dust collection bag. The cleaning and collection device washes away the adhesive carbon fiber particles that adhere to the inner wall of the carbon fiber cutting equipment after the raw materials are cut, and collects them into the waste collection bag. The recycling method includes: soaking a dust collection bag and a waste collection bag filled with carbon fiber particle waste together in a solvent, so that the carbon fiber particle waste is decomposed into carbon fiber and resin, and the dust collection bag and the waste collection bag are decomposed into resin, and finally the carbon fiber and resin are recycled separately. The cleaning and collection method uses a carbon fiber cutting device including a laser cutting device and a housing outside the laser cutting device. The bottom of the housing is provided with an inclined plate, and the middle of the inclined plate is provided with a rotating shaft. The rotating shaft is connected to an inclined motor. The two ends of the inclined plate are respectively provided with liquid outlets. One of the liquid outlets is connected to a coolant recovery tank, and the other liquid outlet is connected to a water tank. The inclined plate can be rotated left and right to switch the two liquid outlets to the lowest position respectively. In the cleaning and recycling method, the dust collection bag and waste collection bag used both include a resin bag body and an elastic resin ring set on the resin bag body. The resin bag body is made of resin material through spinning and weaving. The top of the resin bag body is provided with an inlet. The elastic resin ring is tied and fixed at the inlet. The inlet is connected to an air waste collection device or a cleaning collection device. The resin bag body includes two outer filter layers and an inner filter layer disposed between the two outer filter layers. The inner filter layer is made by melt-blowing, and the outer filter layer is made by machine-woven plain weave. The outer filter layers are placed on both sides of the inner filter layer, and the two outer filter layers are inclined at 45 degrees. Then, a hot press is used to heat the bag and then press it down slightly to make the inner filter layer integrate into the gaps of the outer filter layer. The recycling method includes a cleaning and recycling device that also includes an external ultrasonic decomposition box. The top of the ultrasonic decomposition box is equipped with an ultrasonic device that can be raised and lowered, and the bottom of the ultrasonic decomposition box is connected to a centrifuge. The recycling method includes the following steps: S1. Place the dust collection bag and waste collection bag filled with carbon fiber waste into the ultrasonic decomposition chamber, and soak them in solvent inside the ultrasonic decomposition chamber. S2. After completing step S1, an ultrasonic device is used to enter the solvent, and then the ultrasonic device performs ultrasonic oscillation separation to accelerate the separation of carbon fiber and resin. S3. Centrifugal filtration: The solvent from step S2 is discharged into a centrifuge, and then the centrifuge is started to separate the liquid inside. The final mixture consists of carbon fiber at the bottom, resin in the middle, and pure solution at the top. S4. Separation: Take out and store the mixture containing carbon fiber and the mixture containing resin separately.

2. The cleaning and recycling method for carbon fiber cutting as described in claim 1, characterized in that: In the cleaning and collection method, the air waste collection device also includes a suction head and a vacuum cleaner connected to the suction head pipe. The suction head is installed inside the carbon fiber cutting equipment, and the dust collection bag is installed inside the vacuum cleaner. During collection, a vacuum cleaner draws in airborne carbon fiber particles and waste, which are then stored in a dust collection bag.

3. The cleaning and recycling method for carbon fiber cutting as described in claim 1, characterized in that: The cleaning and collection method includes a cleaning and collection device that further includes nozzles evenly distributed on the top of the housing and a water pump connected to all the nozzles. The water pump is connected to a water tank, and the top of the water tank is connected to a liquid outlet via a pipeline. The waste collection bag is located inside the water tank and installed on the pipeline connected to the liquid outlet. The working method of the cleaning and collection device in the cleaning and collection method is as follows: After the carbon fiber cutting equipment completes the processing, the inclined plate tilts towards the outlet of the water tank. Then, the nozzle of the cleaning and collection device is turned on, allowing water to spray out from the top of the shell. This washes the carbon fiber waste particles adhering to the side wall of the shell and the remaining free carbon fiber particles in the air onto the inclined plate, and finally flows out from the outlet. The carbon fiber waste particles that flow out enter the waste collection bag, while the water passes through the waste collection bag and enters the water tank.

4. The cleaning and recycling method for carbon fiber cutting as described in claim 2, characterized in that: The cleaning and collection method includes a waste crushing and recycling device installed at the waste outlet of the carbon fiber cutting equipment. The waste crushing and recycling device includes a housing and a crushing roller installed inside the housing. The crushing roller is driven by a crushing motor. A discharge pipe is provided at the bottom of the housing and is connected to a water tank. The waste collection bag is installed on the discharge pipe inside the water tank. The cleaning and collection method also includes; After processing, large pieces of waste are discharged from the waste outlet and fall into the waste crushing and recycling device, where they are crushed into small pieces of carbon fiber waste and fall into the waste collection bag.

5. A cleaning and recycling method for carbon fiber cutting as described in any one of claims 1-4, characterized in that: In the recycling method, a centrifuge is equipped with a carbon fiber siphon tube, and a check valve is provided on the carbon fiber siphon tube. One end of the carbon fiber siphon tube is located at the bottom of the centrifuge, and the other end is connected to a carbon fiber storage tank. In step S4, the carbon fiber siphon tube is opened to discharge the mixture containing carbon fiber into the carbon fiber storage tank for storage.

6. The cleaning and recycling method for carbon fiber cutting as described in claim 5, characterized in that: In the recycling method, the centrifuge is equipped with a resin siphon tube, which has a check valve. One end of the resin siphon tube is located in the middle of the centrifuge, and the other end is connected to a resin storage tank. In step S4, the resin siphon tube is opened to discharge the resin-containing mixture into the resin storage tank for storage.

7. The cleaning and recycling method for carbon fiber cutting as described in claim 6, characterized in that: The recycling method further includes the following steps: S5. After completing step S4, dry the solutions in the carbon fiber storage box and the resin storage box respectively, and condense the dried gas to re-form a pure solvent; after drying, the carbon fiber remaining in the carbon fiber storage box is carbon fiber, and the resin remaining in the resin storage box is resin.

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