Winding film excess material and rim charge recycling equipment

Abstract

The invention relates to the technical field of winding film recycling equipment, in particular to winding film excess material and edge material recycling equipment. According to the technical scheme, the device comprises a crushing structure, a conveying structure, a screening structure, a screening assisting structure and a cleaning structure; the crushing structure comprises a crushing cylinder, a crushing shaft, a cutting knife, a fixed knife and a mounting frame; the conveying structure comprises a rack, conveying rollers and a conveying belt; the cleaning structure comprises a second motor, a driving shaft, a cleaning roller, a brush, a second guide rod, a stroke plate, a second spring, scraping teeth, a connecting rod, material stirring teeth, a second driven shaft and a second cam. Through cooperation of the cleaning structure and the smashing structure, scraping teeth strip winding materials passing through a brush through longitudinal rotation, material stirring teeth transversely intercept falling materials on the scraping teeth, the limitation of passive adhesion of a traditional brush head is broken through, and the problem that scraped winding film excess materials and leftover materials can also be adhered to the brush head is solved; the problem that the residual materials and the rim charges are accumulated on the cleaning structure, and stable recovery of the residual materials and the rim charges is affected is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic recycling, and particularly relates to a winding film excess material edge recycling equipment. BACKGROUND

[0002] The winding film is a plastic film with high elasticity and self-adhesion, and is most commonly linear low-density polyethylene, and sometimes low-density polyethylene, ethylene-vinyl acetate copolymer or polyvinyl chloride is also used due to excellent tensile property, toughness and puncture resistance.

[0003] The winding film is used to tightly wrap the goods such as cartons, bags and barrels stacked on a pallet together to form a stable whole unit, prevent the goods from collapsing, shifting and scattering during transportation and storage, and protect the surface of the machine and equipment from scratches, dust and moisture. The melt LLDPE resin is extruded through a wide flat die (T-shaped die) by using a flow casting method in the production process, and is cast onto a high-speed rotating cooling roller to be rapidly cooled and shaped into a film. The melt LLDPE resin is extruded through an annular die to form a tubular film bubble, and compressed air is blown into the film bubble to make it expand. After cooling by a cooling air ring, the film is clamped by a herringbone plate, and then is wound into a flat film by a traction roller. The film is also produced by a blowing method. The melt LLDPE resin is extruded through an annular die to form a tubular film bubble, and compressed air is blown into the film bubble to make it expand. After cooling by a cooling air ring, the film is clamped by a herringbone plate, and then is wound into a flat film by a traction roller.

[0004] The waste generated in the winding film production process is mainly corner material, and excess material and edge material are generated in each production link.

[0005] Both ends of the die: the film extruded from the wide die usually has thin, uneven or bubble-containing defects on both sides;

[0006] Traction cutting edge: during the traction process after flow casting or film blowing, the uneven, uneven thickness or defective edges (usually several centimeters to tens of centimeters in width) on both sides of the film must be continuously cut off by a sharp round knife or razor to ensure that the final wound film has uniform width, neat edges and qualified quality. The part cut off is the continuous "edge material";

[0007] Slitting link: when a large mother roll is slitted into small rolls, a small amount of cutting edge waste and roll core remaining material (tail material) will also be generated;

[0008] Start-up debugging and specification change: when the production line is started, the parameters are debugged, and the product specifications (such as thickness and width) are changed, unqualified products or transition materials will be generated;

[0009] Winding joint: when winding is needed in the winding process, the joint part may become waste material;

[0010] The aforementioned scraps and edge materials have recycling value and are transported to recycling equipment via conveyor. The scraps and edge materials come in various forms, such as film, filament, and strip, and the film layers can adhere to each other and also to the conveyor.

[0011] A Chinese patent (publication number: CN212653718U) was found to describe a waste film recycling device for stretch film production casting machines. The device includes a main body, a support rod on the upper outer surface of the recycling base, a feeding trough on the upper outer surface of the support rod, a replaceable brush head on the upper outer surface of the feeding trough, a buckle on the lower right end of the replaceable brush head, a water inlet on the left outer surface of the feeding trough corresponding to the lower end of the buckle, a feeding water slide on the right end of the water inlet corresponding to the right end of the feeding trough, a recycling crushing cylinder on the right end of the feeding water slide, a crushing fixing plate on the upper end of the recycling crushing cylinder, a crushing blade on the lower end of the crushing fixing plate, and a filter screen on the lower end of the crushing blade. This utility model describes a waste film recycling device for stretch film production casting machines, featuring a replaceable brush head for convenient material handling and a filter screen to prevent inconvenience during material discharge.

[0012] Existing technologies use brush heads to scrape the conveyor belt of a conveyor. However, as mentioned above, the scraped-off stretch film residue and edge material also adhere to the brush head, causing accumulation of residue and edge material on the cleaning structure. This affects the stable recycling of residue and edge material, necessitating a stable recycling structure to address the problem of adhesion between film layers and other objects affecting stable recycling. Therefore, those skilled in the art have provided a stretch film residue and edge material recycling device to solve the problems mentioned in the background art. Summary of the Invention

[0013] The purpose of this invention is to address the problems existing in the background art by proposing a device for recycling and utilizing leftover and edge materials of stretch film.

[0014] To achieve the above objectives, the present invention provides the following technical solution: a device for recycling and utilizing scrap and edge material of stretch film, comprising a crushing structure, a conveying structure, a screening structure, a screening aid structure and a cleaning structure, wherein the crushing structure comprises a crushing cylinder, a crushing shaft located inside the crushing cylinder, multiple sets of cutting blades arranged in a ring array, a fixing blade fixed to the inner wall of the crushing cylinder and corresponding to the cutting blades, and a mounting frame located at the lower end of the crushing cylinder;

[0015] The conveying structure includes a frame located on one side of the upper end of the crushing cylinder, conveying rollers rotatably installed inside the frame and evenly distributed, and a conveyor belt sleeved on the outer wall of the conveying rollers.

[0016] The cleaning structure includes a second motor fixed at the rear end of the crushing cylinder, a drive shaft located at the output end of the second motor and rotatably mounted inside the upper side of the crushing cylinder, a cleaning roller sleeved on the outer wall of the drive shaft, multiple sets of brushes arranged in a ring array on the outer wall of the cleaning roller and attached to the lower side of the end of the conveyor belt, a second guide rod slidably mounted inside the mounting cylinder and symmetrically distributed, a stroke plate located at one end of the second guide rod, a second spring sleeved on the outside of the second guide rod and connected at both ends to the stroke plate and the inner wall of the crushing cylinder, scraper teeth located on the stroke plate and corresponding to the brushes, a connecting rod fixed on the inner wall of the crushing cylinder, feed teeth located at the lower end of the connecting rod and equidistantly distributed, corresponding to the gap between the scraper teeth and located on the lower side of the cleaning roller, a second driven shaft located on one side of the connecting frame, and two cams with different radii sleeved on the outer wall of the second driven shaft.

[0017] Preferably, a bearing bracket one is provided inside the upper end of the crushing cylinder, and the upper end of the crushing shaft is rotatably installed inside the bearing bracket one. A bearing bracket two is provided inside the upper end of the crushing box, and a connecting shaft is rotatably installed inside the bearing bracket two. A bevel gear one is sleeved on one end of the connecting shaft and one side of the upper end of the crushing shaft. Side plates are provided on both the front and rear sides of the upper end of the frame. The drive shaft drives the connecting shaft to rotate through the bevel gear two, which in turn drives the bevel gear one to rotate. The bevel gear one drives the crushing shaft to rotate, thus realizing power transmission. Bearing bracket one and bearing bracket two provide stable support. The bevel gear set changes the direction of power, saving longitudinal space of the equipment. Bearing bracket one and bearing bracket two counteract the cutting reaction force, preventing gear meshing misalignment.

[0018] Preferably, bevel gears two are fitted onto the outer walls of both the drive shaft and the connecting shaft. A fixing rod is provided at the upper end of the bearing bracket two, and a baffle is provided at one end of the fixing rod, located on one side of the conveyor belt, to shield the bevel gears one and part of the connecting shaft. The drive shaft and the connecting shaft transmit power through the meshing of the bevel gears two. The baffle covers the exposed bevel gears one and the connecting shaft, preventing the conveyed wrapping film residue and edge material from contacting the bevel gear set, thus avoiding the residue and edge material of the wrapping film from getting stuck in the gear gaps.

[0019] Preferably, both the drive shaft and the driven shaft are fitted with synchronous pulleys on their outer walls. One end of the crushing cylinder has symmetrically distributed bearing brackets four that are rotatably mounted on the driven shaft. Each synchronous pulley is fitted with a belt three. One end of the connecting frame has a ball bearing two rotatably mounted on the rotation path of the cam two. The synchronous pulleys and belt three transmit power from the drive shaft to the driven shaft, causing the driven shaft two to rotate. The cam two compresses the ball bearing two, reducing friction and resistance during passage, and pushing the scraper teeth to move laterally. A single motor drives the crushing and cleaning, reducing energy consumption and cost. The cam mechanism converts rotation into linear reciprocating motion, and the scraper tooth movement is strictly synchronized with the brush rotation speed.

[0020] Preferably, one end of the conveying roller is provided with a roller shaft, a drive wheel is sleeved on the outer wall of one end of the roller shaft, and a driven wheel is provided on the other end of the roller shaft. The radius of the drive wheel is smaller than that of the driven wheel. Both the drive wheel and the driven wheel are sleeved with belts. The small-radius drive wheel and the large-radius driven wheel are linked by the belts to reduce the speed of the conveyor belt. This speed reduction ensures that the edge material enters the crushing zone evenly, avoids clogging, directly reuses the main driving force, and simplifies the structure.

[0021] Preferably, the screening structure includes a screen bucket fitted onto the outer side of the lower end of the screen cylinder. A collar is fitted onto the outer wall of the screen bucket. A spring arranged in a circular array is disposed between the collar and the mounting frame. A sliding sleeve arranged in a circular array is embedded inside the collar. A guide rod arranged in a circular array and located inside the spring is disposed at the upper end of the mounting frame, with its upper end slidably mounted inside the sliding sleeve. The screen bucket is suspended from the collar by the spring. The collar slides along the guide rod via the sliding sleeve. The inclined surface of the screen bucket guides large particles towards the center. The spring allows the screen bucket to vibrate, enhancing screening efficiency. The inclined structure prevents large particles from being trapped at the edges. During the extension and retraction of the spring, the guide rod slides inside the sliding sleeve, providing longitudinal sliding guidance to the collar and preventing the spring from shifting outwards.

[0022] Preferably, one end of the mounting frame is provided with a bearing bracket three, and a driven shaft one is rotatably mounted inside the bearing bracket three. A cam one with a different radius is sleeved on the outer wall of the driven shaft one. One end of the collar is provided with a mounting block, and a ball one located on the rotation path of the cam one is rotatably mounted inside the mounting block one end. The driven shaft one drives the cam one to rotate, squeezing the ball one and lifting the mounting block, so that the screen bucket is lifted at high frequency. The spring one provides a restoring force, converting the rotation into high frequency micro-amplitude, accelerating particle separation, and the ball one reduces the friction loss of the cam.

[0023] Preferably, one end of the mounting frame is provided with a cleaning structure, which includes a pump casing. One end of the mounting frame is provided with a motor, and the output end of the motor is provided with a pump shaft rotatably mounted inside the pump casing. An impeller rotatably mounted inside the pump casing is sleeved on the outer wall of the pump shaft. The output end of the pump casing is provided with an air supply pipe, and one end of the air supply pipe is provided with an air outlet hood located at the center below the screen hopper. The motor drives the impeller, generating a suction airflow at the suction end of the pump casing. The suction airflow passes through the air supply pipe, exits the air outlet hood, and is sprayed towards the center of the screen hopper. The airflow blows up large, uncrushed particles, promoting secondary crushing. The airflow focuses on the center of the screen hopper, breaking up particle accumulation and preventing strong airflow from interfering with the normal falling of small particles.

[0024] Preferably, a second driven shaft is provided at one end of the driven shaft one. A second drive wheel with a radius smaller than that of the second driven shaft is sleeved on the outer wall of the pump shaft. The radius of the second drive wheel is smaller than that of the second driven wheel. Both the outer walls of the second drive wheel and the second driven wheel are sleeved with belts two. The small-radius second drive wheel and the large-radius second driven wheel are linked by belts two, thereby reducing the speed of the first driven shaft. The vibration of the screen bucket and the air jet are synchronized. The airflow is injected into the central gap at the moment the screen bucket is lifted, maximizing the unblocking effect. The air jet and vibration share the same motor one, simplifying the power system.

[0025] Preferably, the operating steps of the equipment for recycling and utilizing leftover stretch film scraps are as follows:

[0026] S1: First, the residual and edge materials generated at both ends of the die head, the traction cutting, the slitting process, the start-up debugging, the specification change, and the winding joint are placed on the conveyor belt. The conveyor belt transports the residual and edge materials into the crushing cylinder. During this process, the second motor drives the drive shaft to rotate, which in turn drives the second bevel gear to rotate, which in turn drives the connecting shaft to rotate. When the connecting shaft rotates, it drives the first bevel gear on the upper side to rotate. The connecting shaft and the crushing shaft are linked by the first bevel gear to drive the crushing shaft to rotate. The crushing shaft drives the cutting blade to rotate, cutting the downward-falling residual and edge materials of the wrapping film. Because there are multiple sets of cutting blades, the falling residual and edge materials of the wrapping film are continuously cut and crushed into small particles. At the same time, when the cutting blade rotates, it passes through the fixed blade. The shearing force between the fixed blade and the cutting blade cuts the residual and edge materials of the wrapping film, avoiding the situation where the soft residual and edge materials of the wrapping film are not easy to cut.

[0027] S2: During the conveying of residual and edged stretch film, the drive shaft drives the cleaning roller to rotate, which in turn drives the brush to brush the lower edge of the conveyor belt. This causes the residual and edged stretch film adhering to the conveyor belt to be brushed off, and some of the residual and edged stretch film falls into the crushing cylinder. At the same time, a small amount of residual and edged stretch film will wrap around the brush. At this time, the rotation of the drive shaft, through the linkage of the synchronous pulley and belt three, drives the driven shaft two to rotate. The rotating driven shaft two drives the cam two to rotate. When the cam two passes through the ball two, it squeezes the connecting frame. The connecting frame drives the stroke plate to move, and at the same time pulls the spring two. The stroke plate drives the scraper teeth to move horizontally and move in and out of the brush, scraping off the excess and edge material of the stretch film wrapped around the brush. When the second cam passes the second ball, the second spring drives the connecting frame, the stroke plate, and the scraper teeth to reset through its own elastic force. During the reset process, the excess and edge material of the stretch film scraped off the brush will pass through the pusher teeth, forming a squeezing force, so that the scraped excess and edge material of the stretch film is limited and detached by the pusher teeth. Because of the continuous scraping and removal of material, and the force is horizontal in both the longitudinal and transverse directions, the re-adhesion or wrapping of the excess and edge material of the stretch film is avoided, thus achieving effective cleaning of the excess and edge material of the stretch film.

[0028] S3: After the leftover and edge materials of the stretch film are cut into small particles, they are screened through a sieve. Small particles smaller than the sieve hopper will be discharged. Some unqualified large particles will gather at the center due to the inclined surface of the sieve hopper. At this time, the motor and drive pump shaft rotate, and the pump shaft drives the impeller to rotate inside the pump casing. The suction air is delivered through the air supply pipe and sprayed upwards through the air outlet hood at the center of the lower end of the sieve hopper onto the large particles gathered at the center. Incompletely cut leftover and edge materials of the stretch film will also be sprayed upwards. It is worth noting that the airflow should not be too strong to avoid affecting the leftover stretch film. The small particles after edge cutting fall normally. When the pump shaft rotates, the drive wheel two drives the driven wheel two to decelerate and rotate, which in turn drives the driven shaft one to rotate. The driven shaft one drives the cam one to rotate. During the rotation, when the cam one passes through the ball one, it applies a squeezing force to the ball one. The squeezing force drives the collar to rise through the mounting block, which in turn pulls the spring one and drives the screen bucket to rise. After the cam one passes through the ball one, the collar drops due to the elastic force of the spring one. Because the cam one continuously squeezes the ball one, the elastic force of the spring one drives the screen bucket to vibrate at high frequency, which helps to screen the residual material and edge material after cutting of the wrapping film.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] This invention uses an anti-stick conveyor belt to feed edge material into a crushing cylinder. A second motor drives the crushing shaft via a bevel gear set, causing multiple sets of cutting blades and fixed blades to form an alternating shearing force, specifically designed to overcome the flexibility of LLDPE film. A cleaning roller and brush are installed at the end of the conveyor belt to simultaneously peel off residual edge material, preventing blockage of the feed inlet.

[0031] The drive shaft drives the second cam to rotate via the synchronous pulley and belt three, which in turn drives the scraper teeth to reciprocate laterally, forcibly peeling off the material wrapped around the brush. The material-pulling teeth intercept the falling material longitudinally, forming a dynamic scraping and anti-sticking guarantee, which completely solves the problem of adhesion failure of traditional brush heads. The second motor synchronously drives crushing, conveying and cleaning, while the first motor is linked to air jet and screen vibration, reducing energy consumption. The cam mechanism ensures that the scraper teeth action and the brush speed are synchronized. The airflow penetrates the particle layer at the moment the screen bucket is lifted, realizing stable recycling of the film-wound material with zero adhesion throughout the entire process of crushing, cleaning and screening. Attached Figure Description

[0032] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present invention;

[0033] Figure 2 This is a bottom-view three-dimensional structural diagram of the present invention;

[0034] Figure 3 This is a top-view three-dimensional structural diagram of the present invention;

[0035] Figure 4 This is a front-view perspective three-dimensional structural diagram of the internal structure of the crushing cylinder of the present invention;

[0036] Figure 5 This is a bottom-view three-dimensional structural diagram of the interior of the crushing cylinder of the present invention;

[0037] Figure 6 This is a top-view three-dimensional structural diagram of the conveyor roller of the present invention;

[0038] Figure 7 This is a front-view perspective three-dimensional structural diagram of the screening structure of the present invention;

[0039] Figure 8 This is a side view of the three-dimensional structure of the pump casing of the present invention;

[0040] Figure 9 This is a side sectional three-dimensional structural diagram of the pump casing of the present invention;

[0041] Figure 10 This is a top view of the cleaning structure of the present invention from a first perspective.

[0042] Figure 11 This is a top-view, second-angle perspective three-dimensional structural diagram of the cleaning structure of the present invention;

[0043] Figure 12 This is a side-view perspective three-dimensional structural diagram of the baffle of the present invention;

[0044] Figure 13 This is a bottom-view perspective view of the cleaning roller structure of the present invention;

[0045] Figure 14 This is a bottom-view perspective view of the connecting frame structure of the present invention;

[0046] Figure 15 This is a top-view three-dimensional structural diagram of the cleaning roller of the present invention.

[0047] Reference numerals: 100, Crushing structure; 101, Crushing cylinder; 102, Crushing shaft; 103, Cutting blade; 104, Fixing blade; 105, Bearing bracket one; 106, Bevel gear one; 107, Connecting shaft; 108, Baffle; 109, Bearing bracket two; 110, Bevel gear two; 111, Fixing rod; 112, Mounting bracket;

[0048] 200. Conveying structure; 201. Frame; 202. Conveying roller; 203. Roller shaft; 204. Side plate; 205. Drive wheel 1; 206. Belt 1; 207. Driven wheel 1; 208. Conveyor belt;

[0049] 300. Screening structure; 301. Collar; 302. Screen bucket; 303. Spring 1; 304. Sliding sleeve; 305. Guide rod 1; 306. Drive wheel 2; 307. Belt 2; 308. Driven wheel 2; 309. Driven shaft 1; 310. Cam 1; 311. Bearing bracket 3; 312. Mounting block; 313. Ball bearing 1;

[0050] 400. Screening aid structure; 401. Pump casing; 402. Air outlet hood; 403. Motor 1; 404. Air delivery pipe; 405. Impeller; 406. Pump shaft;

[0051] 500. Cleaning structure; 501. Motor II; 502. Drive shaft; 503. Synchronous pulley; 504. Belt III; 505. Driven shaft II; 506. Bearing bracket IV; 507. Cam II; 508. Connecting frame; 509. Ball bearing II; 510. Stroke plate; 511. Guide rod II; 512. Spring II; 513. Scraper teeth; 514. Connecting rod; 515. Feeding teeth; 516. Cleaning roller; 517. Brush. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] Please see Figures 1 to 15 The present invention provides four embodiments:

[0054] Example 1: A device for recycling scrap and edge material of stretch film includes a crushing structure 100, a conveying structure 200, a screening structure 300, a screening aid structure 400, and a cleaning structure 500. The crushing structure 100 includes a crushing cylinder 101, a crushing shaft 102 located inside the crushing cylinder 101, multiple sets of cutting blades 103 arranged in a ring array, a fixing blade 104 fixed to the inner wall of the crushing cylinder 101 and corresponding to the cutting blades 103, and a mounting frame 112 located at the lower end of the crushing cylinder 101.

[0055] The conveying structure 200 includes a frame 201 located on one side of the upper end of the crushing cylinder 101, conveying rollers 202 rotatably installed inside the frame 201 and distributed at equal intervals, and a conveyor belt 208 sleeved on the outer wall of the conveying rollers 202.

[0056] Both the outer wall of the drive shaft 502 and the outer wall of the connecting shaft 107 are fitted with bevel gears 110. The upper end of the bearing bracket 109 is provided with a fixing rod 111. One end of the fixing rod 111 is provided with a baffle 108 located on one side of the conveyor belt 208 and covering the bevel gears 106 and part of the connecting shaft 107.

[0057] Both the drive shaft 502 and the driven shaft 505 are fitted with synchronous pulleys 503. One end of the crushing cylinder 101 is provided with bearing brackets 506 that are symmetrically distributed and rotatably mounted with the driven shaft 505. The outer walls of the synchronous pulleys 503 are fitted with belts 504. One end of the connecting frame 508 is rotatably mounted with ball bearings 509 located on the rotation path of the cam 507. Side plates 204 are provided on both the front and rear sides of the upper end of the frame 201.

[0058] The upper end of the crushing cylinder 101 is provided with a bearing bracket 105. The upper end of the crushing shaft 102 is rotatably installed inside the bearing bracket 105. The upper end of the crushing box is provided with a bearing bracket 109. The bearing bracket 107 is rotatably installed inside the bearing bracket 109. One end of the connecting shaft 107 and one side of the upper end of the crushing shaft 102 are both fitted with a bevel gear 106. The upper end of the frame 201 is provided with side plates 204 on both the front and rear sides.

[0059] In this embodiment, the equipment for recycling leftover scrap from the stretch film first feeds the leftover scrap generated at both ends of the die head, during the traction cutting and slitting processes, into the crushing structure 100 via the conveyor belt 208. Because the stretch film has self-adhesive properties, the scrap may be in the form of film, filaments, or strips, and easily adheres to the conveyor belt 208. The conveyor belt 208 is made of an anti-stick material and has a cleaning roller 516 at its end to prevent scrap accumulation from affecting the feeding. After the scrap enters the crushing cylinder 101, the motor 501 drives the connecting shaft 107, which in turn drives the crushing shaft 102 to rotate via the bevel gear 106. Multiple sets of cutting blades 103 and fixed blades 104 form a shearing force to cut the soft wrapping film edge material into small particles. Traditional crushing equipment has difficulty handling high-toughness films, but the cutting blades 103 of this equipment adopt a staggered arrangement design to ensure that the edge material is continuously sheared rather than wrapped around the blades. The crushed particles are initially screened through the sieve hopper 302. Qualified particles fall directly for collection, while larger particles are blown back to the cutting area by airflow for secondary crushing. This structure solves the clogging problem caused by film adhesion in traditional recycling equipment, improves crushing efficiency, and ensures the uniformity of raw materials for subsequent regeneration and granulation.

[0060] Example 2:

[0061] The cleaning structure 500 includes a second motor 501 fixed at the rear end of the grinding cylinder 101, a drive shaft 502 located at the output end of the second motor 501 and rotatably mounted inside the upper side of the grinding cylinder 101, a cleaning roller 516 sleeved on the outer wall of the drive shaft 502, a brush 517 located on the outer wall of the cleaning roller 516 in a multi-ring array and attached to the lower side of the end of the conveyor belt 208, a second guide rod 511 slidably mounted inside the mounting cylinder in a symmetrical arrangement, a stroke plate 510 located at one end of the second guide rod 511, and a brush 517 sleeved on the drive shaft 502. Spring 512, which is connected to the outer side of rod 511 and both ends of the stroke plate 510 and the inner wall of the crushing cylinder 101; scraper tooth 513, which is located on the stroke plate 510 and corresponds to brush 517; connecting rod 514, which is fixed to the inner wall of crushing cylinder 101; feeding tooth 515, which is located at the lower end of connecting rod 514, is evenly distributed, corresponds to the gap of scraper tooth 513, and is located on the side below cleaning roller 516; driven shaft 505, which is located on the side of connecting frame 508; and cam 507, which is sleeved on the outer wall of driven shaft 505 with a different radius.

[0062] A roller shaft 203 is provided at one end of the conveyor roller 202. A drive wheel 205 is sleeved on the outer wall of one end of the roller shaft 203. A driven wheel 207 is provided at one end of the roller shaft 203. The radius of the drive wheel 205 is smaller than that of the driven wheel 207. A belt 206 is sleeved on the outer wall of both the drive wheel 205 and the driven wheel 207.

[0063] In this embodiment, after prolonged operation, the surface of the conveyor belt 208 is prone to the adhesion of wrapping film edge material, affecting stable feeding. This equipment includes a cleaning structure 500 below the end of the conveyor belt 208. A cleaning roller 516 is driven to rotate by a motor 501, which in turn drives a ring array of brushes 517 to continuously brush the lower surface of the conveyor belt 208, removing residual edge material. However, the brushes 517 themselves can also become entangled with edge material. Therefore, a scraping tooth mechanism 513 is added to the equipment. The drive shaft 502 drives the driven shaft 505 to rotate via a synchronous pulley 503 and a belt 504. The cam 507 rotates... Periodic extrusion ball bearing 509 pushes the connecting frame 508 to move laterally, causing the scraper teeth 513 to repeatedly insert into the gaps of the brush 517 to peel off the adhered edge material. At the same time, the material-pulling teeth 515 form a longitudinal barrier below the brush 517 to prevent the scraped edge material from adhering again. This design breaks through the limitation of traditional brush head cleaning being easily tangled, and achieves dual cleaning of dynamic scraping and static interception, ensuring that the conveyor belt 208 runs continuously without residue. Compared with the replaceable brush heads of the existing technology, this structure does not require frequent brush head replacement, reduces downtime maintenance time, avoids membrane tangling, and improves recycling efficiency.

[0064] Example 3:

[0065] The screening structure 300 includes a screen bucket 302 sleeved on the outer side of the lower end of the screen cylinder. A collar 301 is sleeved on the outer wall of the screen bucket 302. A spring 303 arranged in a ring array is provided between the collar 301 and the mounting frame 112. A sliding sleeve 304 arranged in a ring array is embedded inside the collar 301. A guide rod 305 arranged in a ring array and located inside the spring 303 is provided at the upper end of the mounting frame 112 and is slidably installed inside the sliding sleeve 304 at the upper end.

[0066] One end of the mounting bracket 112 is provided with a bearing bracket 311, and a driven shaft 309 is rotatably mounted inside the bearing bracket 311. A cam 310 with different radii is sleeved on the outer wall of the driven shaft 309. One end of the collar 301 is provided with a mounting block 312, and a ball 313 located on the rotation path of the cam 310 is rotatably mounted inside the mounting block 312.

[0067] A cleaning structure 500 is provided at one end of the mounting bracket 112. The cleaning structure 500 includes a pump housing 401. A motor 403 is provided at one end of the mounting bracket 112. A pump shaft 406 is rotatably installed inside the pump housing 401 at the output end of the motor 403. An impeller 405 is rotatably installed inside the pump housing 401 and sleeved on the outer wall of the pump shaft 406. An air supply pipe 404 is provided at the output end of the pump housing 401. An air outlet hood 402 is provided at one end of the air supply pipe 404, located at the center position below the screen hopper 302.

[0068] A driven shaft 2 505 is provided at one end of the driven shaft 1 309. A drive wheel 2 306 with a radius smaller than that of the driven shaft 2 505 is sleeved on the outer wall of the pump shaft 406. The radius of the drive wheel 2 306 is smaller than that of the driven wheel 2 308. A belt 2 307 is sleeved on the outer wall of both the drive wheel 2 306 and the driven wheel 2 308.

[0069] In this embodiment, the pulverized wound film particles need to be sieved to ensure uniform particle size. The sieve hopper 302 of this equipment is suspended on the collar 301 by a spring 303. The collar 301 slides along the guide rod 305, forming an elastic vibration system. The motor 403 drives the pump shaft 406 to generate airflow, which is sprayed towards the center of the sieve hopper 302 through the air outlet 402, blowing away the accumulated large particles. At the same time, the pump shaft 406 drives the driven shaft 309 to rotate through the belt 307, and the cam 310 squeezes the ball bearing 313, causing the sieve hopper 302 to vibrate at high frequency. The combined effect of airflow jetting and mechanical vibration allows the airflow to penetrate the particle layer as the screen bucket 302 is lifted, blowing uncrushed edge material back to the crushing zone. Meanwhile, the vibration promotes the rapid passage of qualified particles through the screen. Traditional screening equipment is prone to clogging due to electrostatic adsorption of the membrane. This design actively clears blockages through air-vibration coupling, and the inclined surface of the screen bucket 302 guides large particles to converge towards the center, significantly improving screening efficiency. Compared with the static filter discs of existing technologies, this structure dynamically adjusts the screening intensity to adapt to the recycling needs of different viscous materials and ensures stable quality of recycled particles.

[0070] Example 4:

[0071] The operating steps for the equipment for recycling and utilizing leftover stretch film scraps are as follows:

[0072] S1: First, the residual and edge materials generated at both ends of the die head, during the traction cutting, slitting, start-up debugging, specification change, and winding joint are placed on the conveyor belt 208. The conveyor belt 208 transports the residual and edge materials into the crushing cylinder 101. During this process, the motor 2 501 operates, driving the drive shaft 502 to rotate. The drive shaft 502 drives the bevel gear 2 110 to rotate, which in turn drives the connecting shaft 107 to rotate. When the connecting shaft 107 rotates, it drives the bevel gear 1 106 on the upper side to rotate. The connecting shaft 107 and the crushing shaft 102... The crushing shaft 102 is driven to rotate by the linkage of the bevel gear 106. The crushing shaft 102 drives the cutting blade 103 to rotate, cutting the downward-falling stretch film residue and edge material. Because there are multiple sets of cutting blades 103, the falling stretch film residue and edge material are continuously cut and crushed into small particles. At the same time, when the cutting blade 103 rotates, it passes through the fixed blade 104. The shearing force between the fixed blade 104 and the cutting blade 103 cuts the stretch film residue and edge material, avoiding the situation where the soft stretch film residue and edge material are not easy to cut under force.

[0073] S2: During the conveying of residual and edge materials of stretch film, the drive shaft 502 drives the cleaning roller 516 to rotate, which in turn drives the brush 517 to brush the lower edge of the conveyor belt 208, causing the residual and edge materials of stretch film adhering to the conveyor belt 208 to be brushed off. Some of the residual and edge materials of stretch film fall into the crushing cylinder 101. At the same time, a small amount of residual and edge materials of stretch film will wrap around the brush 517. At this time, the rotation of the drive shaft 502 drives the driven shaft 505 to rotate through the linkage of the synchronous pulley 503 and the belt 504. The rotating driven shaft 505 drives the cam 507 to rotate. When the cam 507 passes through the ball bearing 509, it squeezes the connecting frame 508. The connecting frame 508 drives the stroke plate 510 to move. When the second spring 512 is pulled, the stroke plate 510 drives the scraper tooth 513 to move laterally and enter and exit the brush 517, scraping off the excess and edge material of the stretch film wrapped on the brush 517. When the second cam 507 passes the second ball 509, the second spring 512 drives the connecting frame 508, the stroke plate 510, and the scraper tooth 513 to reset through its own elastic force. During the reset process, the excess and edge material of the stretch film scraped off on the brush 517 will be squeezed by the material-pulling tooth 515, so that the scraped excess and edge material of the stretch film is limited and dislodged by the material-pulling tooth 515. Because of the continuous scraping and dislodging, and the force is horizontal in the longitudinal and transverse directions, the re-adhesion or wrapping of the excess and edge material of the stretch film is avoided, and the excess and edge material of the stretch film is effectively cleaned.

[0074] S3: After the leftover and edge materials of the stretch film are cut into small particles, they are screened through the sieve 302. Small particles smaller than the size of the sieve 302 will be discharged through the sieve 302. Some unqualified large particles will converge towards the center due to the inclined surface of the sieve 302. At this time, the motor and drive pump shaft 406 rotate, and the pump shaft 406 drives the impeller 405 to rotate inside the pump casing 401. The suction airflow is delivered through the air supply pipe 404 and blown upwards at the center of the lower end of the sieve 302 through the air outlet hood 402. The large particles that have converged at the center of the lower end of the sieve 302 are also blown upwards. It is worth noting that the airflow should not be too large to avoid affecting the orientation of the small particles after the stretch film leftover and edge materials are cut. As the pump shaft 406 rotates, the drive wheel 306 drives the driven wheel 308 to decelerate and rotate, which in turn drives the driven shaft 309 to rotate. The driven shaft 309 drives the cam 310 to rotate. During the rotation, when the cam passes the ball 313, it applies a squeezing force to the ball 313. The squeezing force drives the collar 301 to rise through the mounting block 312, which in turn pulls the spring 303 and drives the screen bucket 302 to rise. After the cam 310 passes the ball 313, the collar 301 drops due to the elastic force of the spring 303. Because the cam 310 continuously squeezes the ball 313, the elastic force of the spring 303 drives the screen bucket 302 to vibrate at high frequency, which helps to screen the residual material and edge material after the wrapping film is cut.

[0075] The above specific embodiments are merely several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0076] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for recycling and utilizing scrap and edge material from stretch film, comprising a crushing structure (100), a conveying structure (200), a screening structure (300), a screening aid structure (400), and a cleaning structure (500), characterized in that: The crushing structure (100) includes a crushing cylinder (101), a crushing shaft (102) located inside the crushing cylinder (101), a cutting blade (103) arranged in multiple annular arrays, a fixing blade (104) fixed to the inner wall of the crushing cylinder (101) and corresponding to the cutting blade (103), and a mounting bracket (112) located at the lower end of the crushing cylinder (101). The conveying structure (200) includes a frame (201) located on one side of the upper end of the crushing cylinder (101), conveying rollers (202) rotatably installed inside the frame (201) and distributed at equal intervals, and a conveyor belt (208) sleeved on the outer wall of the conveying rollers (202). The cleaning structure (500) includes a second motor (501) fixed at the rear end of the crushing cylinder (101), a drive shaft (502) located at the output end of the second motor (501) and rotatably mounted inside the upper side of the crushing cylinder (101), a cleaning roller (516) sleeved on the outer wall of the drive shaft (502), a brush (517) located on the outer wall of the cleaning roller (516) in multiple annular arrays and attached to the lower side of the end of the conveyor belt (208), a second guide rod (511) slidably mounted inside the mounting cylinder, a stroke plate (510) located at one end of the second guide rod (511), and a brush sleeved on the second guide rod. (511) A second spring (512) connected to the inner wall of the stroke plate (510) and the crushing cylinder (101) on the outside, a scraper tooth (513) located on the stroke plate (510) and corresponding to the brush (517), a connecting rod (514) fixed on the inner wall of the crushing cylinder (101), a feeding tooth (515) located at the lower end of the connecting rod (514) and equidistantly distributed, corresponding to the gap of the scraper tooth (513) and located on the side below the cleaning roller (516), a second driven shaft (505) located on the side of the connecting frame (508), and a second cam (507) sleeved on the outer wall of the second driven shaft (505) with a different radius.

2. The equipment for recycling and utilizing leftover stretch film scraps according to claim 1, characterized in that: The upper end of the crushing cylinder (101) is provided with a bearing bracket (105), the upper end of the crushing shaft (102) is rotatably installed inside the bearing bracket (105), the upper end of the crushing box is provided with a bearing bracket (109), the upper end of the bearing bracket (109) is rotatably installed with a connecting shaft (107), one end of the connecting shaft (107) and one side of the upper end of the crushing shaft (102) are both fitted with a bevel gear (106), and the upper end of the frame (201) is provided with side plates (204) on both the front and rear sides.

3. The equipment for recycling and utilizing leftover stretch film scraps according to claim 2, characterized in that: Both the outer wall of the drive shaft (502) and the outer wall of the connecting shaft (107) are fitted with bevel gears (110). The upper end of the bearing bracket (109) is provided with a fixing rod (111). One end of the fixing rod (111) is provided with a baffle (108) located on the side of the conveyor belt (208) and covering the bevel gears (106) and part of the connecting shaft (107).

4. The equipment for recycling and utilizing leftover stretch film scraps according to claim 2, characterized in that: Both the drive shaft (502) and the driven shaft (505) are fitted with synchronous pulleys (503). One end of the crushing cylinder (101) is provided with symmetrically distributed bearing brackets (506) that are rotatably mounted on the driven shaft (505). The outer walls of the synchronous pulleys (503) are fitted with belts (504). One end of the connecting frame (508) is rotatably mounted with ball bearings (509) located on the rotation path of the cam (507).

5. The equipment for recycling and utilizing leftover and edge materials of stretch film according to claim 1, characterized in that: The conveying roller (202) is provided with a roller shaft (203) at one end. A drive wheel (205) is sleeved on the outer wall of one end of the roller shaft (203). A driven wheel (207) is provided on the other end of the roller shaft (203). The radius of the drive wheel (205) is smaller than that of the driven wheel (207). A belt (206) is sleeved on the outer wall of both the drive wheel (205) and the driven wheel (207).

6. The equipment for recycling and utilizing leftover stretch film scraps according to claim 1, characterized in that: The screening structure (300) includes a screen bucket (302) sleeved on the outer side of the lower end of the screen cylinder. A collar (301) is sleeved on the outer wall of the screen bucket (302). A spring (303) arranged in a ring array is provided between the collar (301) and the mounting frame (112). A sliding sleeve (304) arranged in a ring array is embedded inside the collar (301). A guide rod (305) arranged in a ring array and located inside the spring (303) is provided at the upper end of the mounting frame (112). The upper end of the guide rod (305) is slidably installed inside the sliding sleeve (304).

7. The equipment for recycling and utilizing leftover stretch film scraps according to claim 6, characterized in that: One end of the mounting bracket (112) is provided with a bearing bracket three (311), and a driven shaft one (309) is rotatably mounted inside the bearing bracket three (311). A cam one (310) with different radii is sleeved on the outer wall of the driven shaft one (309). One end of the collar (301) is provided with a mounting block (312), and a ball one (313) located on the rotation path of the cam one (310) is rotatably mounted inside the mounting block (312).

8. The equipment for recycling and utilizing leftover stretch film scraps according to claim 7, characterized in that: The mounting bracket (112) is provided with a cleaning structure (500) at one end. The cleaning structure (500) includes a pump casing (401). The mounting bracket (112) is provided with a motor (403) at one end. The output end of the motor (403) is provided with a pump shaft (406) rotatably installed inside the pump casing (401). An impeller (405) rotatably installed inside the pump casing (401) is sleeved on the outer wall of the pump shaft (406). An air supply pipe (404) is provided at the output end of the pump casing (401). An air outlet hood (402) located at the center position below the screen hopper (302) is provided at one end of the air supply pipe (404).

9. The equipment for recycling and utilizing leftover stretch film scraps according to claim 8, characterized in that: A driven shaft 2 (505) is provided at one end of the driven shaft 1 (309). A drive wheel 2 (306) with a radius smaller than that of the driven shaft 2 (505) is sleeved on the outer wall of the pump shaft (406). The radius of the drive wheel 2 (306) is smaller than that of the driven wheel 2 (308). A belt 2 (307) is sleeved on the outer wall of both the drive wheel 2 (306) and the driven wheel 2 (308).

10. The equipment for recycling and utilizing leftover stretch film scraps according to claim 1, characterized in that: The operating steps for the equipment for recycling and utilizing leftover stretch film scraps are as follows: S1: First, the residual and edge materials generated at both ends of the die head, the traction cutting, the slitting process, the start-up debugging, the specification change, and the winding joint are placed on the conveyor belt (208). The residual and edge materials are transported to the inside of the crushing cylinder (101) by the conveyor belt (208). During this process, the second motor (501) drives the drive shaft (502) to rotate. The drive shaft (502) drives the second bevel gear (110) to rotate, which in turn drives the connecting shaft (107) to rotate. When the connecting shaft (107) rotates, it drives the first bevel gear (106) on the upper side to rotate. The connecting shaft (107) and the crushing shaft (101) are connected. 2) The crushing shaft (102) is driven to rotate by the linkage of the bevel gear (106). The crushing shaft (102) drives the cutting blade (103) to rotate, cutting the downward-falling stretch film residue and edge material. Because there are multiple sets of cutting blades (103), the falling stretch film residue and edge material are continuously cut and crushed into small particles. At the same time, when the cutting blade (103) rotates, it passes through the fixed blade (104). The shearing force of the fixed blade (104) and the cutting blade (103) cuts the stretch film residue and edge material, avoiding the situation where the soft stretch film residue and edge material are not easy to be cut by force. S2: During the conveying of residual and edge materials of stretch film, the drive shaft (502) drives the cleaning roller (516) to rotate, which drives the brush (517) to brush the lower edge of the conveyor belt (208), so that the residual and edge materials of stretch film adhering to the conveyor belt (208) are brushed off. Some of the residual and edge materials of stretch film fall into the crushing cylinder (101). At the same time, a small amount of residual and edge materials of stretch film will wrap around the brush (517). At this time, the drive shaft (502) rotates through the linkage of the synchronous wheel (503) and the belt three (504), which drives the driven shaft two (505) to rotate. The rotating driven shaft two (505) drives the cam two (507) to rotate. When the cam two (507) passes through the ball two (509), it squeezes the connecting frame (508). The connecting frame (508) drives the stroke plate (510). The movement pulls the second spring (512), and the stroke plate (510) drives the scraper (513) to move laterally and enter and exit the brush (517) to scrape off the excess film and edge material wrapped on the brush (517). When the second cam (507) passes the second ball (509), the second spring (512) drives the connecting frame (508), the stroke plate (510), and the scraper (513) to reset through its own elastic force. During the reset process, the excess film and edge material scraped off the brush (517) will pass through the material-pulling teeth (515) to form a squeezing force, so that the scraped excess film and edge material are limited and dislodged by the material-pulling teeth (515). Because of the continuous scraping and dislodging, and the force is horizontal in the longitudinal and transverse directions, the excess film and edge material are prevented from adhering or wrapping again, thus achieving effective cleaning of the excess film and edge material. S3: After the leftover and edge materials of the stretch film are cut into small particles, they are screened through the sieve hopper (302). Small particles smaller than the sieve hopper (302) will be discharged through the sieve hopper (302). Some unqualified large particles will converge at the center due to the inclined surface of the sieve hopper (302). At this time, the motor and drive pump shaft (406) rotate. The pump shaft (406) drives the impeller (405) to rotate inside the pump casing (401). The suction airflow is transported through the air delivery pipe (404) and blown upwards at the center of the lower end of the sieve hopper (302) through the air outlet hood (402). The large particles gathered at the center of the lower end of the sieve hopper (302) are also blown upwards. It is worth noting that the airflow should not be too large to avoid affecting the normal falling of the small particles after the leftover and edge materials of the stretch film are cut. 406) When rotating, the driven wheel 2 (306) drives the driven wheel 2 (308) to decelerate and rotate, thereby driving the driven shaft 1 (309) to rotate. The driven shaft 1 (309) drives the cam 1 (310) to rotate. During the rotation, when passing through the ball 1 (313), it applies a squeezing force to the ball 1 (313). The squeezing force drives the collar (301) to rise through the mounting block (312), thereby pulling the spring 1 (303) and driving the screen bucket (302) to rise. After the cam 1 (310) passes through the ball 1 (313), the collar (301) drops through the elastic force of the spring 1 (303). Because the cam 1 (310) continuously squeezes the ball 1 (313), the elastic force of the spring 1 (303) drives the screen bucket (302) to vibrate at high frequency, which helps to screen the residual material and edge material after the wrapping film is cut.

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