A head and tail cleaning system

Abstract

This invention discloses a head and tail material cleaning system, which relates to the field of monocrystalline silicon head and tail material cleaning technology. The system includes a housing, a conveying mechanism, a bottom cleaning mechanism, a side cleaning mechanism, and a cleaning and blowing mechanism. The housing has one or more sections; each section contains a bottom cleaning mechanism, a side cleaning mechanism, and a cleaning and blowing mechanism in sequence. The conveying mechanism runs through all the housings, transporting the head and tail materials sequentially to each mechanism for processing. This system can clean the conical surface and bottom surface of the head and tail materials, better adapting to the product while achieving continuous operation and improving processing efficiency.

Description

Technical Field

[0001] This invention relates to the field of head and tail material cleaning technology for monocrystalline silicon, and specifically to a head and tail material cleaning system. Background Technology

[0002] Monocrystalline silicon head and tail materials are the materials located at both ends of the silicon rod during the production process of monocrystalline silicon rods. These parts usually cannot be used directly for subsequent production due to quality or shape not meeting the requirements. Although head and tail materials cannot be used directly for the production of solar cell products, they can be processed through processes such as cleaning and crushing to ensure that the surface is clean and free of impurities. The processed products can then be supplied to monocrystalline silicon manufacturers for reuse in production.

[0003] In the cleaning process, traditionally, both head and tail materials and edge scraps are cleaned by soaking. This method involves pickling the head and tail materials in a pickling tank, placing them in a basket, and then immersing them for a certain period before removing them. This soaking method is time-consuming, and the cleaning effect is greatly affected by the soaking time. Batch cleaning does not create continuous production operations and cannot meet the factory's edge scrap processing needs, resulting in low efficiency. Our factory designed an edge scrap cleaning system based on the above situation. However, because the shape of edge scraps differs from that of head and tail materials—edge scraps only require cleaning the top and bottom surfaces, while head and tail materials have a conical structure—this three-dimensional structure cannot be directly applied to the edge scrap cleaning system. Therefore, the applicant designed a cleaning system suitable for head and tail materials to meet the needs of the cleaning section. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a head and tail material cleaning system. This system can clean the conical and bottom surfaces of the head and tail materials, better adapting to the product while enabling continuous operation and improving processing efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A head and tail material cleaning system includes a box, a conveying mechanism, a bottom cleaning mechanism, a side cleaning mechanism, and a cleaning and blowing mechanism; the box has one or more sections; each section of the box is sequentially equipped with a bottom cleaning mechanism, a side cleaning mechanism, and a cleaning and blowing mechanism; the conveying mechanism runs through all the boxes and transports the head and tail materials sequentially to each mechanism for processing.

[0007] Preferably, the conveying mechanism includes: a conveyor chain, a driven roller, a first sprocket, a second sprocket, a first motor, a pusher rod, a drive roller, a third sprocket, a chain, and a second motor; the conveyor chain is provided inside the housing where the side cleaning mechanism and the cleaning and blowing mechanism are located; the first sprocket and the second sprocket are respectively movably provided at both ends of the conveyor chain; the first sprocket is driven by the first motor; pusher rods are arranged on the conveyor chain to push the head and tail materials along the driven roller; the driven roller is located between the conveyor chains;

[0008] The cleaning and blowing mechanism has active rollers arranged inside its housing; each active roller has a third sprocket fixed at one end of its roller shaft on the back of the housing; the third sprockets are driven by a chain; and the roller shaft of one of the active rollers is connected to the drive end of a second motor.

[0009] Preferably, the bottom cleaning mechanism includes: a cleaning belt, a counterweight plate, a guide rod, a fixed frame, a first lifting cylinder, and a movable sleeve; a cleaning belt is provided inside the housing where the bottom cleaning mechanism is located, the cleaning belt is positioned between driven rollers and is on the same horizontal plane as the driven rollers; the surface of the cleaning belt is provided with bristles to rub the bottom of the head and tail material; a fixed frame is provided above the cleaning belt; the fixed frame is fixed to the back plate of the housing; a first lifting cylinder is fixed above the fixed frame; a counterweight plate is movably provided below the fixed frame; one end of the counterweight plate is fixed to the guide rod; a movable sleeve is fixed to the end of the counterweight plate; the telescopic end of the first lifting cylinder is slidably connected to the groove of the movable sleeve; while the first lifting cylinder drives the fixed frame to move up and down along the guide rod, the counterweight plate has an independent up and down movement range within a certain range through the movable sleeve.

[0010] Preferably, the side cleaning mechanism includes: a support frame, a cleaning cylinder, a connecting shaft, a third motor, a lifting plate, a slider, a lead screw, a fourth motor, and a top cover; a top cover is fixed to the top of the housing with the side cleaning mechanism; a support frame is fixed to the inner side of the top cover; a lead screw is movably mounted on the support frame; a slider is fixed to the middle of the lifting plate; the slider and the lead screw cooperate to drive the lifting plate to move up and down; the top of the lead screw is driven by the third motor; a fourth motor is fixed to the lifting plate; the driving end of the fourth motor is connected to the cleaning cylinder through a connecting shaft; the fourth motor drives the cleaning cylinder to rotate; brush bristles are fixed inside the cleaning cylinder.

[0011] Preferably, the cleaning and purging mechanism includes: a spray assembly and an air knife assembly; the spray assembly includes an upper spray pipe and a lower spray pipe; the upper spray pipe and the lower spray pipe are connected to a water source; the lower spray pipe is located within the gap of the drive roller; the upper spray pipe and the lower spray pipe form a set of spray assemblies; the air knife assembly includes: guide strips, fixed brackets, corner brackets, side air knives, and bottom air knives; the air knife assembly is separately installed in a section of the housing, and guide strips are horizontally fixed on the inner walls of both sides of the housing; fixed brackets are provided on the bottom surface of the guide strips; bottom air knives are fixed between the fixed brackets, and the bottom air knives are located at the gap of the drive roller; corner brackets are fixed on the inner walls of both sides of the housing; side air knives are obliquely fixed on the corner brackets, and the side air knives and bottom air knives form a triangular positional relationship on the same vertical plane, and the head and tail materials pass through the middle of the triangular structure formed by the side air knives and the bottom air knives; each air knife assembly is connected to an air source.

[0012] Preferably, a lifting mechanism is provided at the position of the driven roller gap below the side cleaning mechanism; the lifting mechanism includes: a support bar, a lifting connecting plate, a limit switch, and a second lifting cylinder; the second lifting cylinder is fixed in the back space of the back plate of the housing; the telescopic end of the second lifting cylinder is fixed to one end of the lifting connecting plate; the other end of the lifting connecting plate passes through the back plate and a support bar is fixed on the plate surface; the support bar corresponds to the gap position of the driven roller; the back plate is provided with a movable groove at the position corresponding to the lifting connecting plate; a limit switch is fixed to the outside of the support bar, the limit switch is fixed on the bracket, and the bracket is fixed to the side plate of the driven roller; the trigger of the limit switch is higher than the surface of the driven roller; when the head and tail materials move to the position of the driven roller above the support bar, the limit switch is pressed down to trigger the limit switch, and after the support bar is raised by the control of the second lifting cylinder, the surface of the support bar is higher than the push rod, and the conveyor chain stops moving.

[0013] Preferably, the bottom cleaning mechanism and the side cleaning mechanism are alternately arranged in one or more sets; there is an empty box between the side cleaning mechanism and the box where the spray pipe is located; there is an empty box between the box where the spray assembly is located and the box where the air knife assembly is located; there is one or more sets of spray assembly; there is one or more sets of air knife assembly; each set of spray assembly and air knife assembly is separately arranged in a section of box.

[0014] Preferably, the counterweight compartment plate has a hollow structure, and a counterweight block is placed inside the hollow structure.

[0015] Preferably, a pusher block is fixed on the pusher rod; the surface of the pusher block is provided with an arc surface that fits against the side wall of the head and tail material.

[0016] Preferably, the cleaning belt is tensioned by a belt roller, which is driven by a fifth motor; the rotation direction of the cleaning belt is opposite to the conveying direction of the conveyor chain.

[0017] Beneficial effects of this invention:

[0018] 1. The side cleaning mechanism can clean the conical surface 360°, perfectly matching the sides of the head and tail materials; the bottom cleaning mechanism uses a cleaning belt and counterweight pressure to clean the bottom surface through friction. This ensures that the head and tail materials are cleaned by physical friction without any blind spots.

[0019] 2. After physical friction, the residue adhering to the head and tail materials is washed away by spraying. The air knife structure has also been improved to adapt to the shape and structure of the head and tail materials, allowing for rapid air drying. This better adapts to the product and enables continuous operation, improving processing efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the connection relationship in this invention.

[0022] Figure 2 This is a schematic diagram of the internal connection relationship of the housing of the present invention.

[0023] Figure 3 This is a schematic diagram showing the connection relationship between the bottom and side cleaning mechanisms of the present invention.

[0024] Figure 4 This is a schematic diagram of the connection relationship of the cleaning and blowing mechanism of the present invention.

[0025] Figure 5 This is a schematic diagram of the back conveying structure of the cleaning and blowing mechanism of the present invention.

[0026] Figure 6 This is a schematic diagram of the overall back connection relationship of the present invention.

[0027] Figure 7 This is a schematic diagram of the connection relationship of the conveyor chain according to the present invention.

[0028] Figure 8 This is a schematic diagram showing the positional relationship of the lifting mechanism of the present invention.

[0029] Figure 9 This is a schematic diagram of the counterweight connection relationship of the bottom cleaning mechanism of the present invention.

[0030] Figure 10 This is a schematic diagram showing the positional relationship between the air knife assembly and the spray assembly of the present invention.

[0031] In the diagram, 1 is the housing, 1.1 is the back plate, 2 is the conveying mechanism, 211 is the conveying chain, 212 is the driven roller, 213 is the first sprocket, 214 is the second sprocket, 215 is the first motor, 216 is the push rod, 217 is the drive roller, 218 is the third sprocket, 219 is the chain, 220 is the second motor, 3 is the bottom cleaning mechanism, 311 is the cleaning belt, 312 is the counterweight plate, 313 is the counterweight block, 314 is the guide rod, 315 is the fixed frame, 316 is the first lifting cylinder, 317 is the movable sleeve, 318 is the chute, 319 is the fifth motor, 4 is the side cleaning mechanism, and 41 is the support frame. 1. Cleaning cylinder 412, connecting shaft 413, third motor 414, lifting plate 415, slider 416, lead screw 417, fourth motor 418, top cover 419, cleaning and blowing mechanism 5, spray assembly 511, upper spray pipe 512, lower spray pipe 513, air knife assembly 514, guide bar 515, fixed bracket 516, corner bracket 517, side air knife 518, bottom air knife 519, head and tail materials 6, lifting mechanism 7, support bar 711, lifting connecting plate 712, limit switch 713, second lifting cylinder 714, bracket 715. Detailed Implementation

[0032] like Figure 1 , 2 As shown, a head and tail material cleaning system includes a housing 1, a conveying mechanism 2, a bottom cleaning mechanism 3, a side cleaning mechanism 4, and a cleaning and blowing mechanism 5. The housing 1 has one or more sections; each section of the housing 1 contains the bottom cleaning mechanism 3, the side cleaning mechanism 4, and the cleaning and blowing mechanism 5 sequentially. The conveying mechanism 2 runs through all the housings 1, transporting the head and tail materials 6 sequentially to each mechanism for processing. The bottom cleaning mechanism 3 and the side cleaning mechanism 4 are alternately arranged in one or more sets; the first cleaning step can be repeated to improve the cleaning effect. An empty box separates the side cleaning mechanism 4 from the housing 1 containing the spray pipe; an empty box also separates the housing 1 containing the spray assembly 511 from the housing 1 containing the air knife assembly 514; the empty boxes separate the various mechanisms, and curtains can be hung inside the empty boxes to reduce the impact between the housings. The spray assembly 511 has one or more sets; the air knife assembly 514 has one or more sets; each set of the spray assembly 511 and the air knife assembly 514 is separately arranged in one section of the housing 1 to avoid the spray mist affecting the subsequent blowing effect.

[0033] like Figure 2 , 3As shown in Figures 4, 6, and 7, the conveying mechanism 2 includes: a conveying chain 211, a driven roller 212, a first sprocket 213, a second sprocket 214, a first motor 215, a pusher rod 216, a driving roller 217, a third sprocket 218, a chain 219, and a second motor 220; the conveying chain 211 is provided inside the housing 1 where the side cleaning mechanism 4 and the cleaning and blowing mechanism 5 are located; the first sprocket 213 and the second sprocket 214 are movably provided at both ends of the conveying chain 211; the first sprocket 213 is driven by the first motor 215; pusher rods 216 are arranged on the conveying chain 211 to push the head and tail materials 6 along the driven roller 212; the driven roller 212 is located between the conveying chains 211; a pusher block is fixed on the pusher rod 216; the surface of the pusher block is provided with an arc surface that fits against the side of the head and tail materials 6. The head and tail materials 6 on the driven roller 212 are mainly moved by the push rod 216 driven by the conveyor chain 211. The cleaning and blowing mechanism 5 has drive rollers 217 arranged inside its housing 1. A third sprocket 218 is fixed to one end of the roller shaft of each drive roller 217 located on the back of the housing 1. The third sprockets 218 are driven by chains 219. The roller shaft of one drive roller 217 is connected to the drive end of the second motor 220. After moving to the drive roller 217, the drive roller 217 automatically drives the head and tail materials 6 to continue moving.

[0034] like Figure 3 , 9As shown, the bottom cleaning mechanism 3 includes: a cleaning belt 311, a counterweight plate 312, a guide rod 314, a fixing frame 315, a first lifting cylinder 316, and a movable sleeve 317. The cleaning belt 311 is located inside the housing 1 where the bottom cleaning mechanism 3 is situated. The cleaning belt 311 is positioned between the driven rollers 212 and is on the same horizontal plane as the driven rollers 212. The surface of the cleaning belt 311 is provided with bristles to rub against the bottom of the head and tail materials 6. The cleaning belt 311 is tensioned by belt rollers, which are driven by a fifth motor. The rotation direction of the cleaning belt 311 is opposite to the conveying direction of the conveyor chain 211. When the head and tail materials 6 pass through the cleaning belt 311, they are subjected to friction, thus achieving a preliminary cleaning effect. Considering the need for sufficient friction during cleaning, a certain pressure needs to be applied to the passing head and tail materials 6. Therefore, a fixed frame 315 is provided above the cleaning belt 311. The fixed frame 315 is fixed to the back plate 1.1 of the box body 1. A first lifting cylinder 316 is fixed above the fixed frame 315. A counterweight plate 312 is movably provided below the fixed frame 315. The counterweight plate 312 has a hollow structure, and a counterweight block 313 is placed inside the hollow structure. One end of the counterweight plate 312 is fixed to the guide rod 314. A movable sleeve 317 is fixed to the end of the counterweight plate 312. The telescopic end of the first lifting cylinder 316 is slidably connected to the slide groove 318 of the movable sleeve 317. While the fixed frame 315 moves up and down along the guide rod 314 through the first lifting cylinder 316, the counterweight plate 312 also has an independent up and down movement range within a certain range through the movable sleeve 317. The movable range is designed to prevent the first lifting cylinder 316 from directly applying rigid pressure. The movable range can have a certain upward adjustment space while the counterweight pressure is being squeezed by the slide groove 318. Directly applying pressure by the first lifting cylinder 316 will damage the head and tail materials.

[0035] like Figure 2 , 3 As shown, the side cleaning mechanism 4 includes: a support frame 411, a cleaning cylinder 412, a connecting shaft 413, a fourth motor 418, a lifting plate 415, a slider 416, a lead screw 417, a top cover 419; the top of the housing 1 equipped with the side cleaning mechanism 4 is fixedly covered with a top cover 419; the support frame 411 is fixedly covered inside the top cover 419; the lead screw 417 is movably mounted on the support frame 411; the slider 416 is fixedly mounted in the middle of the lifting plate 415; the slider 416 and the lead screw 417 cooperate to drive the lifting plate 415 to move up and down; the top of the lead screw 417 is driven by a third motor 414; the fourth motor 418 is fixedly mounted on the lifting plate 415; the driving end of the fourth motor 418 is connected to the cleaning cylinder 412 through the connecting shaft 413, and the fourth motor 418 drives the cleaning cylinder to rotate; brush bristles are fixed inside the cleaning cylinder 412. The diameter of the cleaning cylinder 412 should be larger than the diameter of the head and tail materials 6, and the brush inside the cylinder should contact the conical surface of the head and tail materials 6. The third motor 414 controls the lifting and lowering via the lead screw 417, and the fourth motor 418 controls the rotation of the cleaning cylinder 412.

[0036] like Figure 2 , 4 As shown in Figures 5 and 10, the cleaning and purging mechanism 5 includes: a spray assembly 511 and an air knife assembly 514; the spray assembly 511 includes an upper spray pipe 512 and a lower spray pipe 513; the upper spray pipe 512 and the lower spray pipe 513 are connected to a water source; the lower spray pipe 513 is located within the gap of the drive roller 217; the upper spray pipe 512 and the lower spray pipe 513 form a set of spray assemblies 511; the air knife assembly 514 includes a guide bar 515, a fixed bracket 516, a corner bracket 517, and a side air knife 514. 18. Bottom air knife 519; air knife assembly 514 is separately installed in a section of housing 1. Guide strips 515 are horizontally fixed on the inner walls of both sides of housing 1. Fixed brackets 516 are provided on the bottom surface of the guide strips 515. Bottom air knife 519 is fixed between the fixed brackets 516 and is located at the gap of the drive roller 217. Angle brackets 517 are fixed on the inner walls of both sides of housing 1. Side air knife 518 is fixed obliquely on the angle brackets 517. Clamps are used to fix the side air knife 518 in an oblique position. The side air knife 518 and bottom air knife 519 form a triangular positional relationship on the same vertical plane. The head and tail material 6 passes through the middle of the triangular structure formed by the side air knife 518 and bottom air knife 519. Each air knife assembly 514 can spray the head and tail material 6 once through three air knives. Each air knife assembly 514 is connected to a solenoid valve. The air inlet of the solenoid valve is connected to the air source. The solenoid valve can be connected to a controller to control its opening and closing.

[0037] like Figure 2 , 3 As shown in Figure 8, the following optimizations are made:

[0038] A lifting mechanism 7 is provided at the gap position of the driven roller 212 below the side cleaning mechanism 4. The main function of the lifting mechanism is to place the head and tail materials 6 at the position of the cleaning cylinder 412, lift the head and tail materials 6, so that the head and tail materials 6 are separated from the conveying roller, and ensure that all the head and tail materials 6 are cleaned and enter the cleaning cylinder 412. The lifting mechanism 7 includes: a support bar 711, a lifting connecting plate 712, a limit switch 713, and a second lifting cylinder 714. The second lifting cylinder 714 is fixed in the back space of the back plate 1.1 of the housing 1. The telescopic end of the second lifting cylinder 714 is fixed to one end of the lifting connecting plate 712. The other end of the lifting connecting plate 712 passes through the back plate 1.1 and the support bar 711 is fixed on the plate surface. The support bar 711 corresponds to the gap position of the driven roller 212. The back plate 1.1 is provided with a movable groove at the position corresponding to the lifting connecting plate 712. The movable groove is covered with a telescopic cover for protection. A limit switch 713 is fixed to the outer side of the support bar 711. The limit switch 713 is fixed to the bracket 715, which is fixed to the side plate of the driven roller 212. The side plate forms the frame of the driven roller 212. The trigger of the limit switch 713 is higher than the surface of the driven roller 212. When the head and tail materials 6 move to the position of the driven roller 212 above the support bar 711, they press down to trigger the limit switch 713. After the support bar 711 is raised by the second lifting cylinder 714, the surface of the support bar 711 is higher than the push rod 216, and the conveyor chain stops moving. Unless otherwise described, the fixing method is welded or threaded using common technical means in the industry.

[0039] The workflow is as follows:

[0040] The head and tail materials 6 are fed in from the feed end. The head and tail materials 6 first pass through the bottom cleaning mechanism 3, and then reach the side cleaning mechanism. The lifting mechanism lifts the head and tail materials 6, the cleaning cylinder 412 descends to clean and then resets. The lifting mechanism resets, and the head and tail materials 6 continue to move forward. After passing through 3 sets of alternating bottom cleaning mechanisms 3 and side cleaning mechanisms, they reach the spray assembly 511 for cleaning. After cleaning, the edge material is moved to the position of the air knife assembly 514. After passing through the air knife assembly 514, the water on the surface of the head and tail materials 6 is blown dry, and the head and tail materials 6 are removed from the equipment.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A head and tail material cleaning system, characterized in that: It includes a box body, a conveying mechanism, a bottom cleaning mechanism, a side cleaning mechanism, and a cleaning and blowing mechanism; the box body is provided in one or more sections; each section of the box body is provided with a bottom cleaning mechanism, a side cleaning mechanism, and a cleaning and blowing mechanism in sequence; the conveying mechanism runs through all the boxes body and transports the head and tail materials to each mechanism for processing in sequence; The bottom cleaning mechanism includes: a cleaning belt, a counterweight plate, a guide rod, a fixed frame, a first lifting cylinder, and a movable sleeve. A cleaning belt is located inside the housing of the bottom cleaning mechanism, positioned between driven rollers and on the same horizontal plane as them. The cleaning belt surface is provided with brush bristles to rub the bottom of the head and tail material. A fixed frame is located above the cleaning belt; the fixed frame is fixed to the back plate of the housing. A first lifting cylinder is fixed above the fixed frame. A counterweight plate is movably positioned below the fixed frame. The counterweight plate is fixed to one end of the guide rod. A movable sleeve is fixed to the end of the counterweight plate. The telescopic end of the first lifting cylinder is slidably connected to the groove of the movable sleeve. While the first lifting cylinder drives the fixed frame to move up and down along the guide rod, the counterweight plate also has an independent up-and-down movement range within a certain area via the movable sleeve.

2. The head and tail material cleaning system according to claim 1, characterized in that: The conveying mechanism includes: a conveyor chain, a driven roller, a first sprocket, a second sprocket, a first motor, a pusher rod, a drive roller, a third sprocket, a chain, and a second motor; the conveyor chain is housed within the housing containing the side cleaning mechanism and the cleaning and blowing mechanism; the first sprocket and the second sprocket are movably mounted at both ends of the conveyor chain; the first sprocket is driven by the first motor; pusher rods are arranged on the conveyor chain to push the head and tail materials along the driven roller; the driven roller is located between the conveyor chains; The cleaning and blowing mechanism has active rollers arranged inside its housing; each active roller has a third sprocket fixed at one end of its roller shaft on the back of the housing; the third sprockets are driven by a chain; and the roller shaft of one of the active rollers is connected to the drive end of a second motor.

3. The head and tail material cleaning system according to claim 1, characterized in that: The side cleaning mechanism includes: a support frame, a cleaning cylinder, a connecting shaft, a third motor, a lifting plate, a slider, a lead screw, a fourth motor, and a top cover; a top cover is fixed to the top of the housing with the side cleaning mechanism; a support frame is fixed to the inner side of the top cover; a lead screw is movably mounted on the support frame; a slider is fixed to the middle of the lifting plate; the slider and the lead screw cooperate to drive the lifting plate to move up and down; the top of the lead screw is driven by the third motor; a fourth motor is fixed to the lifting plate; the drive end of the fourth motor is connected to the cleaning cylinder through a connecting shaft; the fourth motor drives the cleaning cylinder to rotate; brush bristles are fixed inside the cleaning cylinder.

4. The head and tail material cleaning system according to claim 1, characterized in that: The cleaning and purging mechanism includes: a spray assembly and an air knife assembly; the spray assembly includes an upper spray pipe and a lower spray pipe; the upper and lower spray pipes are connected to a water source; the lower spray pipe is located within the gap of the drive roller; the upper and lower spray pipes form a set of spray assemblies; the air knife assembly includes: guide strips, fixed brackets, corner brackets, side air knives, and bottom air knives; the air knife assembly is separately installed in a section of the housing, and guide strips are horizontally fixed on the inner walls of both sides of the housing; fixed brackets are provided on the bottom surface of the guide strips; bottom air knives are fixed between the fixed brackets and are located in the gap of the drive roller; corner brackets are fixed on the inner walls of both sides of the housing; side air knives are obliquely fixed on the corner brackets, and the side air knives and bottom air knives form a triangular positional relationship on the same vertical plane, and the head and tail materials pass through the middle of the triangular structure formed by the side air knives and bottom air knives; each air knife assembly is connected to an air source.

5. The head and tail material cleaning system according to claim 3, characterized in that: A lifting mechanism is provided below the side cleaning mechanism at the corresponding gap position of the driven roller; the lifting mechanism includes: a support bar, a lifting connecting plate, a limit switch, and a second lifting cylinder; the second lifting cylinder is fixed in the back space of the back plate of the housing; the telescopic end of the second lifting cylinder is fixed to one end of the lifting connecting plate; the other end of the lifting connecting plate passes through the back plate and a support bar is fixed on the plate surface; the support bar corresponds to the gap position of the driven roller; the back plate has a movable groove at the position corresponding to the lifting connecting plate; a limit switch is fixed to the outside of the support bar, the limit switch is fixed on the bracket, and the bracket is fixed to the side plate of the driven roller; the trigger of the limit switch is higher than the surface of the driven roller; when the head and tail materials move to the position of the driven roller above the support bar, the limit switch is pressed down to trigger the limit switch, and after the support bar is raised by the control of the second lifting cylinder, the surface of the support bar is higher than the push rod, and the conveyor stops moving.

6. The head and tail material cleaning system according to claim 4, characterized in that: The bottom cleaning mechanism and the side cleaning mechanism are alternately arranged in one or more sets; there is an empty box between the side cleaning mechanism and the box where the spray pipe is located; there is an empty box between the box where the spray assembly is located and the box where the air knife assembly is located; there is one or more sets of spray assembly; there is one or more sets of air knife assembly; each set of spray assembly and air knife assembly is separately arranged in a section of box.

7. The head and tail material cleaning system according to claim 1, characterized in that: The counterweight compartment has a hollow structure, and a counterweight block is placed inside the hollow structure.

8. The head and tail material cleaning system according to claim 2, characterized in that: A pusher block is fixed on the pusher rod; the surface of the pusher block is provided with an arc surface that fits against the side wall of the head and tail material.

9. The head and tail material cleaning system according to claim 1, characterized in that: The cleaning belt is tensioned by belt rollers, which are driven by a fifth motor; the rotation direction of the cleaning belt is opposite to the conveying direction of the conveyor chain.

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