Plastic pulverizer and pulverizing method

Abstract

The application relates to the technical field of pulverizers, in particular to a plastic pulverizer which comprises a base, a pulverizing device, a material conveying pipeline and a screening pipeline; the screening pipeline is in conductive connection with the material conveying pipeline; the material conveying pipeline and the screening pipeline are provided with a conveying belt which can circularly move in the screening pipeline and the material conveying pipeline through a transmission drum; the conveying belt is provided with a magnetic component; the application also relates to a pulverizing method of the plastic pulverizer. Compared with the prior art, the plastic pulverizer can automatically screen metal parts mixed in plastic through cooperation of the conveying belt, the magnetic component and a baffle, so that the labor intensity of workers is reduced, the working efficiency of the plastic pulverizer is further improved, time and labor are saved, the safety hidden danger problem of screening metal parts by using manual work in the traditional technology is solved, and the reliability and safety of the plastic pulverizer are improved.

Description

Technical Field

[0001] This invention relates to the field of crusher technology, and in particular to a plastic crusher and crushing method. Background Technology

[0002] During the injection molding process, the plastic in the runner (sprue) and defective products can usually be recycled, crushed, and reused. The plastic from the sprue and defective products is collected and then put into a plastic crusher. The plastic is crushed into granules and then mixed with new material in a certain proportion for use.

[0003] For crushing operations, these plastics must not be mixed with metals or other impurities to ensure the purity of the plastic particles. Plastic crushers can only crush plastic materials, not metal materials. However, the inventors discovered in actual production that it is difficult to prevent these materials from being mixed with metal parts during the collection of sprues and defective products. Furthermore, products often have metal inserts during manufacturing, and these metal parts, when entering the plastic crusher along with the plastic, accelerate the wear of the crusher blades. Therefore, before these plastics containing metal parts are crushed by the blades, these metal parts need to be removed manually, which poses certain safety hazards. Additionally, these metal parts are usually small in size and quantity, and manually sieving them is time-consuming, labor-intensive, and affects the efficiency of plastic crushing.

[0004] Therefore, a new technical solution needs to be researched to address the above problems. Summary of the Invention

[0005] In view of this, the present invention addresses the deficiencies of the prior art, and its main objective is to provide a plastic crusher that effectively solves the technical problem that existing crushing devices for crushing plastics require manual sieving of metal parts.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a plastic pulverizer, comprising...

[0007] Base;

[0008] A crushing device, located on the machine base, is used to crush plastics;

[0009] The material conveying pipe is located on the machine base and is used to feed material to the crushing device;

[0010] The machine base is equipped with a screening pipe, which is connected to the conveying pipe. The conveying pipe and the screening pipe are equipped with a conveyor belt, which can circulate between the screening pipe and the conveying pipe through a drive roller. The conveyor belt is equipped with a magnetic component, and the screening pipe is equipped with a baffle. When a metal part attracted by the conveyor belt is input into the screening pipe, the baffle can peel off the metal part and drop it into the screening pipe.

[0011] The beneficial effect of the plastic crusher provided in this application is that when plastic crushing is performed, the plastic is fed into the conveying pipe. At this time, the metal parts mixed in the plastic can be attracted by the magnetic parts of the conveyor belt and enter the screening pipe with the movement of the conveyor belt. Finally, the baffle in the screening pipe will peel them off from the conveyor belt and drop them into the screening pipe.

[0012] Compared with existing technologies, firstly, the combination of conveyor belts, magnetic components and baffles enables automated screening of metal parts mixed in with plastic, thereby reducing the labor intensity of operators and further improving the operating efficiency of plastic crushers, saving time and effort;

[0013] Secondly, it solves the safety hazards associated with manual screening of metal parts in traditional technology, thereby improving the reliability and safety of the plastic crusher.

[0014] As a preferred embodiment, the top of the conveying pipe is provided with a first opening for inputting materials, and the bottom is provided with a second opening for feeding materials into the crushing device. A first metal detection device is provided on the side of the first opening, and a second metal detection device is provided on the side of the second opening.

[0015] As a preferred embodiment, the screening pipe is configured with an "L" shape, forming a vertical pipe and a horizontal pipe. The top of the vertical pipe has a third opening, which is connected to the conveying pipe and located below the first opening.

[0016] The bottom of the vertical pipe is connected to the rear end of the horizontal pipe, and the front end of the horizontal pipe has a fourth opening, which is connected to the material conveying pipe and located above the second opening.

[0017] The baffle is installed in the upper middle part of the horizontal pipe, and the conveyor belt is stacked on top of the baffle.

[0018] As a preferred embodiment, a first discharge port is provided on the right side of the horizontal pipe, and a first storage box is provided on one side of the first discharge port;

[0019] A first inclined plate is installed on the horizontal pipe. One end of the first inclined plate is connected to the upper left side of the horizontal pipe, and the other end is connected to the bottom of the first discharge port.

[0020] The baffle is installed on the horizontal pipe and located on one side of the area where the first discharge port is located.

[0021] As a preferred embodiment, a first control plate is pivotally connected to the top of the conveying pipe, and a first cylinder is pivotally connected to the other end of the first control plate. The first cylinder can drive the first control plate to swing and close the first opening or adjust the size of the first opening.

[0022] A second discharge port is provided on one side of the bottom of the material conveying pipe. A second control plate is pivotally connected to the bottom of the first discharge port. A second cylinder is pivotally connected to the second control plate. The second cylinder can drive the second control plate to swing and close the second discharge port or the second opening.

[0023] As a preferred embodiment, a first feeding box is provided on one side of the second feeding port, and a second storage box is provided on one side of the first feeding box;

[0024] The first feeding bin contains a liquid that can separate plastic from metal parts. The first feeding bin is equipped with a baffle belt conveyor that can lift and transfer the plastic from the first feeding bin to the second storage bin.

[0025] As a preferred embodiment, the pulverizing device includes a pulverizing chamber, a fixed blade fixedly mounted in the pulverizing chamber, a first drive shaft rotatably mounted in the pulverizing chamber, a toothed blade fixedly mounted in the first drive shaft, a claw blade fixedly mounted in the first drive shaft, and a first actuator for driving the first drive shaft to rotate.

[0026] The top of the crushing box has an upper opening that is connected to the first opening; the bottom of the crushing box has a lower opening, and the base is detachably equipped with a first collection box, which is located below the lower opening.

[0027] As a preferred embodiment, the conveyor belt includes a first belt sleeved on a plurality of drive rollers and a second belt sleeved on the first belt, with a magnetic component disposed on the first belt;

[0028] When the first belt and the second belt move to the horizontal pipe, the baffle can separate the first belt and the second belt; when the first belt and the second belt move to the vertical pipe and the material conveying pipe, the second belt is superimposed on the first belt.

[0029] As a preferred embodiment, a portion of the magnetic component is embedded in the surface of the first belt facing the second belt, and a first recess is provided on the side of the second belt facing the first belt;

[0030] When the first belt and the second belt move to the vertical pipe and the material conveying pipe, another part of the magnetic component can be inserted into the first recess; when the first belt and the second belt move to the horizontal pipe, the baffle can separate the first belt and the second belt and disengage the magnetic component from the first recess.

[0031] This application also provides a pulverizing method for a plastic pulverizer, applicable to a plastic pulverizer, the pulverizing method including the following steps.

[0032] Step 1: Provide plastic by feeding the plastic into the conveying pipe through the first opening;

[0033] Step 2: The first metal detection device and the second metal detection device perform detection operations. Based on the feedback information from the first metal detection device and the second metal detection device, there are three operating states:

[0034] In operation state A, neither the first metal detection device nor the second metal detection device detects any metal parts. The first cylinder is activated to drive the first material control plate to open the first opening and adjust the cross-section of the conveying pipe through the first material control plate to control the amount of plastic entering the conveying pipe. The second cylinder is activated to drive the second material control plate to open the second opening and close the second discharge port.

[0035] Operation status B: The first metal detection device detects a metal part, while the second metal detection device does not detect a metal part; the first cylinder is activated to drive the first material control plate to close the first opening or reduce the cross-section of the conveying pipe to control and reduce the amount of plastic entering the conveying pipe; the second cylinder is activated to drive the second material control plate to open the second opening and close the second discharge port.

[0036] In operating state C, both the first metal detection device and the second metal detection device detect metal parts. The first cylinder is activated to drive the first material control plate to completely close the first opening, thereby stopping the plastic from entering the conveying pipe. The second cylinder is activated to drive the second material control plate to close the second opening and open the second discharge port.

[0037] Step 3: Depending on the operating state A, the conveyor belt movement can be selectively started or stopped; depending on the operating state B and operating state C, the conveyor belt movement is started to transfer the metal parts adsorbed on the conveyor belt to the horizontal pipe. The baffle is used to peel off the metal parts attached to the conveyor belt, so that the metal parts fall into the horizontal pipe.

[0038] Step 4: Continuously supply plastic by feeding the plastic into the conveying pipe through the first opening, and repeat steps 1-3 to continuously screen out the metal parts contained in the plastic.

[0039] The beneficial effect of the pulverizing method of the plastic pulverizer provided in this application is that, compared with the prior art,

[0040] Firstly, the first and second detection devices can detect whether the plastic in the conveying pipe contains metal parts. With the help of the first and second control plates, non-magnetic metal parts can be discharged from the second discharge port, while magnetic metal parts are attracted to the conveyor belt and fed into the horizontal pipe for peeling. The screening of metal parts in the plastic fed into the plastic crusher can be completed without the need for manual operation, thereby ensuring that only plastic participates in the crushing operation and thus ensuring the purity of the crushed plastic particles.

[0041] Secondly, it eliminates the need for manual sieving of metal parts mixed with plastic, thereby improving the crushing efficiency of the plastic crusher, reducing the labor intensity of operators, and saving time and effort; at the same time, it can improve the reliability and safety of the plastic crusher. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this application, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a three-dimensional structural schematic diagram of the plastic pulverizer provided in the first embodiment of this application;

[0044] Figure 2 yes Figure 1 The left view of the plastic shredder shown;

[0045] Figure 3 yes Figure 1 The image shows the front view of the plastic shredder.

[0046] Figure 4 yes Figure 1 The diagram shows the specific structure of the crushing device in the plastic crusher.

[0047] Figure 5 yes Figure 1 The first cross-sectional view of the plastic shredder shown;

[0048] Figure 6 yes Figure 1 The diagram shows the specific structure of the horizontal pipe and the first storage bin of the plastic crusher.

[0049] Figure 7 yes Figure 5 The diagram shows the specific structure of the conveyor belt installed in the material conveying pipeline, horizontal pipeline and vertical pipeline;

[0050] Figure 8yes Figure 3 The diagram shown illustrates the specific structure of the plastic crusher, which includes a first feeding box and a second storage box.

[0051] Figure 9 This is a three-dimensional structural schematic diagram of the plastic shredder provided in the second embodiment of this application;

[0052] Figure 10 yes Figure 9 The first cross-sectional view of the plastic shredder shown;

[0053] Figure 11 yes Figure 10 The diagram shows the specific structure of the conveyor belt installed in the material conveying pipeline, horizontal pipeline, and vertical pipeline.

[0054] The following are the labeling elements in the figure:

[0055] 100. Plastic shredder;

[0056] 10. Base; 11. First collection box; 12. Control box;

[0057] 20. Crushing device; 21. Crushing box; 211. Upper opening; 212. Lower opening; 22. Fixed blade; 23. First drive shaft; 24. Toothed blade; 25. Claw blade; 26. First actuator;

[0058] 30. Material conveying pipe; 31. First opening; 32. Second opening; 33. First metal detection device; 34. Second metal detection device; 35. First control plate; 351. First cylinder; 36. Second discharge port; 361. Second control plate; 362. Second cylinder; 363. First discharge box; 364. Second storage box; 365. Baffle belt conveyor;

[0059] 40. Screening pipe; 41. Vertical pipe; 42. Horizontal pipe; 421. First discharge port; 422. First storage bin; 423. First inclined plate; 43. Third opening; 44. Fourth opening; 45. Baffle;

[0060] 50. Conveyor belt; 51. First belt; 52. Second belt; 53. Drive roller; 54. Magnetic component; 55. First recess. Detailed Implementation

[0061] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0062] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0063] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0064] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0065] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0066] Before providing a detailed explanation of the embodiments of this application, the application scenarios of the embodiments of this application will be described first.

[0067] In the injection molding process of plastic products, the plastic in the runner (sprue) and defective products can usually be recycled and reused after crushing. However, plastic products often contain embedded metal parts, and some metal parts inevitably get mixed in when collecting these sprues and defective products. Once this plastic mixed with metal parts enters the plastic shredder for crushing, it will not only result in insufficient purity of the crushed plastic shell, but also wear down the blades due to the participation of these metal parts in the crushing process.

[0068] Please refer to the following: Figures 1 to 11 The plastic crusher 100 provided in several embodiments of this application will now be described.

[0069] The plastic crusher 100 includes a base 10, a crushing device 20 disposed on the base 10 for crushing plastic into plastic granules, a conveying pipe 30 disposed on the base 10 for feeding plastic into the crushing device 20, and a screening pipe 40 disposed on the base 10 and connected to the conveying pipe 30. The conveying pipe 30 and the screening pipe 40 are equipped with conveyor belts 50, which can circulate between the screening pipe 40 and the conveying pipe 30 via a drive roller 53. The conveyor belt 50 is equipped with a magnetic component 54, and the screening pipe 40 is equipped with a baffle 45. When a metal object attracted to the conveyor belt 50 is input into the screening pipe 40, the baffle 45 can peel off the metal and drop it into the screening pipe 40.

[0070] Specifically, during plastic crushing, the plastic is fed into the conveying pipe 30. Metal parts mixed in the plastic are attracted by the magnetic component 54 of the conveyor belt 50 and move with the conveyor belt 50 into the screening pipe 40. Finally, the baffle 45 inside the screening pipe 40 removes them from the conveyor belt 50 and they fall into the screening pipe 40. Compared with existing technologies, firstly, the cooperation of the conveyor belt 50, magnetic component 54, and baffle 45 enables automated screening of metal parts mixed in the plastic, thereby reducing the labor intensity of operators and further improving the operating efficiency of the plastic crusher 100, saving time and effort. Secondly, it solves the safety hazards associated with manual screening of metal parts in traditional technologies, thus improving the reliability and safety of the plastic crusher 100.

[0071] It should be noted that the magnetic component 54 is a strong magnet strip. There are multiple magnetic components 54, which are spaced apart along the length of the conveyor belt 50. Each magnetic component 54 can extend along the width of the conveyor belt 50, so that the entire conveyor belt 50 is magnetic, so as to attract magnetic metal parts to the conveyor belt 50.

[0072] Please refer to the following: Figures 1 to 8 This is the specific structure of the plastic crusher 100 provided in the first embodiment of this application. The plastic crusher 100 provided in the first embodiment includes a base 10, a crushing device 20, a material conveying pipe 30, a screening pipe 40, and a conveyor belt 50.

[0073] In the first embodiment, the top of the conveying pipe 30 is provided with a first opening 31 for inputting materials, and the bottom is provided with a second opening 32 for feeding materials into the crushing device 20. A first metal detection device 33 is provided on the side of the first opening 31, and a second metal detection device 34 is provided on the side of the second opening 32. The crushing device 20 includes a crushing box 21, a fixed blade 22 fixedly installed in the crushing box 21, a first drive shaft 23 rotatably installed in the crushing box 21, a toothed blade 24 fixedly installed in the first drive shaft 23, a claw blade 25 fixedly installed in the first drive shaft 23, and a first actuator 26 for driving the first drive shaft 23 to rotate. The top of the crushing box 21 has an upper opening 211, which is conductively connected to the first opening 31. The bottom of the crushing box 21 has a lower opening 212. The base 10 is detachably provided with a first collection box 11, which is located below the lower opening 212 and can collect plastic particles.

[0074] Specifically, when the plastic fed into the first opening 31 does not have metal parts, the plastic without metal parts can enter the crushing box 21 through the second opening 32 and the upper opening 211; the first actuator 26 drives the first transmission shaft 23 to rotate, thereby driving the toothed blade 24 and the claw blade 25 to crush the plastic in the crushing box 21 into granules.

[0075] It should be noted that the first actuator 26 is a motor, which can control the rotation speed of the first drive shaft 23 through a frequency converter, thereby adjusting the crushing speed according to specific crushing requirements.

[0076] Furthermore, the screening pipe 40 is configured with an "L" shape to form a vertical pipe 41 and a horizontal pipe 42. The top of the vertical pipe 41 has a third opening 43, which is connected to the conveying pipe 30 and located below the first opening 31. The bottom of the vertical pipe 41 is connected to the rear end of the horizontal pipe 42. The front end of the horizontal pipe 42 has a fourth opening 44, which is connected to the conveying pipe 30 and located above the second opening 32. The baffle 45 is installed in the upper middle part of the horizontal pipe 42, and the conveyor belt 50 is stacked on top of the baffle 45.

[0077] Preferably, the conveying pipe 30 has at least a partially inclined region, which is inclined from top to bottom and forward. The front end of the horizontal pipe 42 is connected to the lower end of the inclined region of the conveying pipe 30, the lower end of the vertical pipe 41 is connected to the rear end of the horizontal pipe 42, and the upper end of the vertical pipe 41 is connected to the upper end of the inclined region of the conveying pipe 30, so that the inclined region of the conveying pipe 30, the horizontal pipe 42, and the vertical pipe 41 form a triangular structure. By setting the inclined region of the conveying pipe 30, plastic parts and metal parts entering the plastic pipe need to fall onto the conveyor belt 50 before falling into the second opening 32. The inclined region of the conveying pipe 30 also slows down the falling speed of plastic parts and metal parts, which helps to improve the reliability of magnetic metal parts being attracted to the conveyor belt 50.

[0078] Specifically, when arranging the drive rollers 53 required for the conveyor belt 50 according to the inclined area structure of the conveying pipe 30, the drive rollers 53 need to be arranged in the inclined area of ​​the conveying pipe 30, the horizontal pipe 42 and the vertical pipe 41, so that the conveyor belt 50 can circulate to the inclined area of ​​the conveying pipe 30, the horizontal pipe 42 and the vertical pipe 41.

[0079] In the first embodiment, a first discharge port 421 is provided on the right side of the horizontal pipe 42, and a first storage box 422 is provided on one side of the first discharge port 421; a first inclined plate 423 is installed on the horizontal pipe 42, one end of the first inclined plate 423 is connected to the upper left side of the horizontal pipe 42, and the other end is connected to the bottom of the first discharge port 421; a baffle 45 is installed on the horizontal pipe 42 and located on one side of the area where the first discharge port 421 is located.

[0080] During operation, after the metal parts adsorbed on the conveyor belt 50 enter the horizontal pipe 42, the baffle 45 will peel off the metal parts adsorbed on the conveyor belt 50 and guide them through the first inclined surface to fall into the first storage box 422. It is not necessary to manually remove the metal parts in the horizontal pipe 42, which saves the downtime of the plastic crusher 100, thereby improving the operating efficiency of the plastic crusher 100 and reducing the labor intensity of the operators, saving time and effort.

[0081] Specifically, a first control plate 35 is pivotally connected to the top of the conveying pipe 30, and a first cylinder 351 is pivotally connected to the other end of the first control plate 35. The first cylinder 351 can drive the first control plate 35 to swing and close the first opening 31 or adjust the size of the first opening 31. When plastic is input into the conveying pipe 30, once the first metal detection device 33 identifies that the plastic contains metal parts, it immediately sends the identification signal to the control system of the plastic crusher 100, and the control system starts the first cylinder 351 to drive the first control plate 35 to close the first opening 31, thereby performing metal screening on the plastic that has been input into the conveying pipe 30.

[0082] Understandably, the number of metal parts can also be distinguished based on the signal strength detected by the first metal detection device 33. The position of the first control plate 35 can be controlled based on the number of these metal parts to change the cross-section of the conveying pipe 30 and reduce the amount of plastic parts input to assist in screening metal parts without completely closing the first opening 31. Only after a certain amount of metal parts are identified will the first control plate 35 completely close the first opening 31 to improve the reliability of metal part screening.

[0083] Continuing from above, a second discharge port 36 is provided on one side of the bottom of the material conveying pipe 30. A second control plate 361 is pivotally connected to the bottom of the first discharge port 421. A second cylinder 362 is pivotally connected to the second control plate 361. The second cylinder 362 can drive the second control plate 361 to swing and close the second discharge port 36 or the second opening 32.

[0084] If the second metal detection device 34 can still identify metal parts before the plastic parts fall through the second opening 32, it indicates that these metal parts are not magnetic. At this time, the second metal detection device 34 sends the identification signal to the control system, which then activates the second cylinder 362 to drive the second control plate 361 to swing and close the second opening 32 and open the second discharge port 36. Meanwhile, the first cylinder 351 controls the first control plate 35 to swing and completely close the first opening 31, stopping the feeding. This removes non-magnetic metal parts mixed in with the plastic parts. This ensures that only plastic parts are input into the crushing device 20, thereby improving the purity of the plastic granules.

[0085] Understandably, since the second metal detection device 34 needs to identify whether there are still metal parts in the plastic that falls into the second opening 32, the second metal detection device 34 needs to be installed at the intersection of the fourth opening 44 and the second opening 32 to ensure that it can promptly identify whether there are still metal parts in the plastic that is about to fall from the second opening 32, and send the detection signal to the control system so that the second cylinder 362 can promptly drive the second material control plate 361 to close the second opening 32 and open the second discharge port 36.

[0086] It should be noted that the first metal detection device 33 and the second metal detection device 34 are metal detectors or metal sensors. For example, a metal sensor as disclosed in CN105182427B; or a metal detection device as disclosed in CN216561039U; or other detectors capable of identifying metal objects, which will not be elaborated here.

[0087] Preferably, a first feeding box 363 is provided on one side of the second feeding port 36, and a second storage box 364 is provided on one side of the first feeding box 363. The first feeding box 363 contains a liquid that can separate the plastic and the metal parts. Since the plastic and the metal parts have different densities, the plastic and the metal parts can be separated by the liquid, so that the plastic parts float in the liquid and the metal parts sink to the bottom of the first feeding box 363. The first feeding box 363 is provided with a baffle belt conveyor (not shown in the figure). The baffle belt conveyor can lift the plastic in the first feeding box 363 and transfer it to the second storage box 364 to complete the screening of the plastic parts and the non-magnetic metal parts. Subsequently, the plastic parts in the second storage box 364 are put back into the first opening 31, and this part of the plastic can be crushed.

[0088] It should be noted that baffle belt conveyors are also called lifting conveyors or sidewall conveyors. For example, there is an anti-adhesion vertical lifting corrugated sidewall conveyor belt authorized by Chinese Utility Model CN211618972U, or a lifting conveyor belt authorized by Chinese Utility Model CN204211013U. This type of baffle belt conveyor is existing technology and will not be described in detail here.

[0089] Please refer to the following: Figures 9 to 11 This is the specific structure of the plastic crusher 100 provided in the second embodiment of this application. The structure of the second embodiment of this application is generally the same as that of the first embodiment, except that the conveyor belt 50 includes a first belt 51 and a second belt 52.

[0090] In the second embodiment, the first belt 51 is sleeved on a plurality of drive rollers 53, and the second belt 52 is sleeved on the first belt 51; the magnetic component 54 is disposed on the first belt 51; when the first belt 51 and the second belt 52 move to the horizontal pipe 42, the baffle 45 can separate the first belt 51 and the second belt 52; when the first belt 51 and the second belt 52 move to the vertical pipe 41 and the material conveying pipe 30, the second belt 52 is stacked on the first belt 51.

[0091] Specifically, the baffle 45 is made of soft iron, silicon steel sheet, acrylic, or PVC board. After the first belt 51 and the second belt 52 are separated by the baffle 45, the magnetic component 54 can be isolated from the magnetic force generated on the second belt 52 by the baffle 45, so that the second belt 52 is not magnetic when it is in the area covered by the baffle 45, thereby allowing the metal parts attached to the second belt 52 to fall off automatically. This structure not only improves the reliability of the metal parts falling off, but also ensures that the second belt 52 is not easily worn, thereby extending the service life of the belt.

[0092] Preferably, a portion of the magnetic component 54 is embedded in the surface of the first belt 51 facing the second belt 52, and a first recess 55 is provided on the side of the second belt 52 facing the first belt 51; when the first belt 51 and the second belt 52 move to the vertical pipe 41 and the material conveying pipe 30, the other portion of the magnetic component 54 can be embedded in the first recess 55; when the first belt 51 and the second belt 52 move to the horizontal pipe 42, the baffle 45 can separate the first belt 51 and the second belt 52 and disengage the magnetic component 54 from the first recess 55.

[0093] Specifically, by setting the first recess 55, the magnetic component 54 can be embedded in the first recess 55 to provide strong magnetism to the second belt 52, thereby improving the reliability of adsorbing magnetic metal parts; moreover, during the movement of the first belt 51, the structure of the magnetic component 54 being embedded in the first recess 55 can improve the reliability of the first belt 51 moving synchronously with the second belt 52, reduce the probability of the second belt 52 slipping, and thus improve the reliability of the cyclic movement of the first belt 51 and the second belt 52.

[0094] Understandably, since the baffle 45 can separate the first belt 51 and the second belt 52, after the first belt 51 and the second belt 52 exit the horizontal pipe 42 and move to the vertical pipe 41, the tension provided by the transmission roller 53 on the first belt 51 and the second belt 52 can be used to allow the first belt 51 and the second belt 52 to be re-overlapped, and a part of the magnetic component 54 to be re-embedded in the first recess 55, so as to continuously provide magnetic force to the second belt to attract magnetic metal parts.

[0095] This application also provides a crushing method using a plastic crusher 100, including the following steps:

[0096] Step 1: Provide plastic by feeding the plastic into the conveying pipe 30 through the first opening 31;

[0097] Step 2: The first metal detection device 33 and the second metal detection device 34 perform detection operations. Based on the feedback information from the first metal detection device 33 and the second metal detection device 34, there are three operating states:

[0098] In operation state A, neither the first metal detection device 33 nor the second metal detection device 34 detects any metal parts. The first cylinder 351 is activated to drive the first material control plate 35 to open the first opening 31 and adjust the cross-section of the material conveying pipe 30 through the first material control plate 35 to control the amount of plastic entering the material conveying pipe 30. The second cylinder 362 is activated to drive the second material control plate 361 to open the second opening 32 and close the second discharge port 36.

[0099] In operation state B, the first metal detection device 33 detects a metal part, while the second metal detection device 34 does not detect a metal part; the first cylinder 351 is activated to drive the first material control plate 35 to close the first opening 31 or reduce the cross-section of the conveying pipe 30 to control and reduce the amount of plastic entering the conveying pipe 30; the second cylinder 362 is activated to drive the second material control plate 361 to open the second opening 32 and close the second discharge port 36.

[0100] In operating state C, both the first metal detection device 33 and the second metal detection device 34 detect metal parts. The first cylinder 351 is activated to drive the first material control plate 35 to completely close the first opening 31, so as to stop the plastic from entering the conveying pipe 30. The second cylinder 362 is activated to drive the second material control plate 361 to close the second opening 32 and open the second discharge port 36.

[0101] Step 3: Depending on the operation status A, the conveyor belt 50 can be selectively started or stopped; depending on the operation status B and operation status C, the conveyor belt 50 is started to transfer the metal parts adsorbed on the conveyor belt 50 to the horizontal pipe 42, and the baffle 45 is used to peel off the metal parts attached to the conveyor belt 50, so that the metal parts fall into the horizontal pipe 42.

[0102] Step 4: Continuously supply plastic by feeding the plastic into the conveying pipe 30 through the first opening 31, and repeat steps 1-3 to continuously screen the metal parts contained in the plastic.

[0103] Specifically, in the first aspect, the plastic in the conveying pipe 30 can be detected by the first detection device and the second detection device to see if it contains metal parts. With the cooperation of the first control plate 35 and the second control plate 361, non-magnetic metal parts can be discharged from the second discharge port 36, and magnetic metal parts are attracted to the conveyor belt 50 and fed into the horizontal pipe 42 for peeling. The screening of metal parts in the plastic fed into the plastic crusher 100 can be completed without the need for manual operation, thereby ensuring that only plastic participates in the crushing operation and thus ensuring the purity of the crushed plastic particles.

[0104] Secondly, the elimination of the need for manual sieving of metal parts mixed with plastic improves the crushing efficiency of the plastic crusher 100, reduces the labor intensity of operators, and saves time and effort; at the same time, it enhances the reliability and safety of the plastic crusher 100.

[0105] Specifically, in step 2, when the plastic crusher 100 is in operating state B, it can detect the number of metal parts by the first metal detection device 33 and feed this information back to the control system. The control system then starts the first cylinder to drive the first control plate to swing, thereby adjusting the cross-section of the conveying pipe and controlling the amount of plastic fed into the conveying pipe, thus ensuring that the screening of metal parts can be carried out reliably.

[0106] It is understandable that in step 2, when the plastic crusher 100 is in operating state A, even if the first metal detection device does not detect any metal parts, the first control plate can still be driven to swing by starting the first cylinder to adjust the cross-section of the conveying pipe in order to control the amount of plastic input.

[0107] More specifically, in step 3, when the plastic crusher is in operating state C, the plastic parts and non-magnetic metal parts fall together from the second discharge port into the first discharge box. The liquid in the first discharge box causes the plastic parts to float on the surface of the liquid, while the metal parts sink to the bottom of the first discharge box. The baffle belt conveyor lifts the parts floating on the surface of the liquid to the second storage box, so that the plastic parts can be fed into the conveying pipe for crushing in subsequent processes.

[0108] It should be noted that the control system includes a control box 12 installed on the base. The control box 12 integrates a programmable logic controller, a distributed control system, a power supply module, relays, contactors and other switching elements. The working status of each component is controlled by this control system. This is a common design method for non-standard field technicians and will not be described in detail here.

[0109] The above are merely preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for explaining the principles of the present invention and should not be construed as limiting the scope of protection of the present invention in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention, as well as other specific embodiments of the present invention that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present invention.

Claims

1. A plastic shredder, comprising: Base (10); A crushing device (20) is provided on the base (10) and is used to crush plastic; A material conveying pipe (30) is provided on the machine base (10) and is used to feed material to the crushing device (20); Its features are, The base (10) is provided with a screening pipe (40), which is connected to the conveying pipe (30). The conveying pipe (30) and the screening pipe (40) are provided with a conveyor belt (50), which can circulate between the screening pipe (40) and the conveying pipe (30) through the drive roller (53). The conveyor belt (50) is provided with a magnetic component (54), and the screening pipe (40) is provided with a baffle (45). When a metal part attracted by the conveyor belt (50) is input into the screening pipe (40), the baffle (45) can peel off the metal and drop it into the screening pipe (40). The top of the conveying pipe (30) is provided with a first opening (31) for inputting materials, and the bottom is provided with a second opening (32) for feeding materials into the crushing device (20). A first metal detection device (33) is provided on the side of the first opening (31), and a second metal detection device (34) is provided on the side of the second opening (32). The top of the material conveying pipe (30) is pivotally connected to a first control plate (35), and the other end of the first control plate (35) is pivotally connected to a first cylinder (351). The first cylinder (351) can drive the first control plate (35) to swing and close the first opening (31) or adjust the size of the first opening (31). The bottom side of the conveying pipe (30) is provided with a second discharge port (36). The bottom of the first discharge port (421) is pivotally connected to a second control plate (361). The second control plate (361) is pivotally connected to a second cylinder (362). The second cylinder (362) can drive the second control plate (361) to swing and close the second discharge port (36) or the second opening (32).

2. The plastic pulverizer according to claim 1, characterized in that, The screening pipe (40) is an "L" shaped structure that forms a vertical pipe (41) and a horizontal pipe (42). The top of the vertical pipe (41) has a third opening (43), which is connected to the conveying pipe (30) and is located below the first opening (31). The bottom of the vertical pipe (41) is connected to the rear end of the horizontal pipe (42), and the front end of the horizontal pipe (42) has a fourth opening (44). The fourth opening (44) is connected to the conveying pipe (30) and is located above the second opening (32). The baffle (45) is installed in the middle of the horizontal pipe (42) at the upper position, and the conveyor belt (50) and the baffle (45) are stacked one on top of each other.

3. The plastic pulverizer according to claim 1 or 2, characterized in that, A first discharge port (421) is provided on the right side of the horizontal pipe (42), and a first storage box (422) is provided on one side of the first discharge port (421). A first inclined plate (423) is installed on the horizontal pipe (42). One end of the first inclined plate (423) is connected to the upper left side of the horizontal pipe (42), and the other end is connected to the bottom of the first discharge port (421). The baffle (45) is installed on the horizontal pipe (42) and located on one side of the area where the first discharge port (421) is located.

4. The plastic pulverizer according to claim 3, characterized in that, A first feeding box (363) is provided on one side of the second feeding port (36), and a second storage box (364) is provided on one side of the first feeding box (363). The first feeding bin (363) contains a liquid that can separate plastic from metal parts. The first feeding bin (363) is equipped with a baffle belt conveyor that can lift and transfer the plastic in the first feeding bin (363) to the second storage bin (364).

5. The plastic pulverizer according to claim 1, 2, or 4, characterized in that, The pulverizing device (20) includes a pulverizing box (21), a fixed blade (22) fixedly mounted on the pulverizing box (21), a first drive shaft (23) rotatably mounted on the pulverizing box (21), a toothed blade (24) fixedly mounted on the first drive shaft (23), a claw blade (25) fixedly mounted on the first drive shaft (23), and a first actuator for driving the first drive shaft (23) to rotate. The crushing box (21) has an upper opening (211) at the top, which is connected to the first opening (31); the crushing box (21) has a lower opening (212) at the bottom, and the base (10) is detachably provided with a first collection box (11), which is located below the lower opening (212).

6. The plastic pulverizer according to claim 5, characterized in that, The conveyor belt (50) includes a first belt (51) sleeved on a plurality of drive rollers (53) and a second belt (52) sleeved on the first belt (51), and a magnetic component (54) is provided on the first belt (51). When the first belt (51) and the second belt (52) move to the horizontal pipe (42), the baffle (45) can separate the first belt (51) and the second belt (52); when the first belt (51) and the second belt (52) move to the vertical pipe (41) and the material conveying pipe (30), the second belt (52) is stacked on the first belt (51).

7. The plastic pulverizer according to claim 6, characterized in that, A portion of the magnetic component (54) is embedded in the surface of the first belt (51) facing the second belt (52), and a first recess (55) is provided on the side of the second belt (52) facing the first belt (51). When the first belt (51) and the second belt (52) move to the vertical pipe (41) and the material conveying pipe (30), another part of the magnetic component (54) can be inserted into the first recess (55); when the first belt (51) and the second belt (52) move to the horizontal pipe (42), the baffle (45) can separate the first belt (51) and the second belt (52) and disengage the magnetic component (54) from the first recess (55).

8. A method for crushing plastic using a plastic crusher, applied to the plastic crusher according to any one of claims 1-7, characterized in that, The pulverization method includes the following steps: Step 1, provide plastic by feeding the plastic into the conveying pipe through the first opening (31); Step 2: The first metal detection device (33) and the second metal detection device (34) perform detection operations. Based on the feedback information from the first metal detection device (33) and the second metal detection device (34), there are three operating states: In operation state A, neither the first metal detection device (33) nor the second metal detection device (34) detected any metal parts. The first cylinder (351) was activated to drive the first control plate (35) to open the first opening (31) and adjust the cross-section of the conveying pipe through the first control plate (35) to control the amount of plastic entering the conveying pipe. The second cylinder (362) was activated to drive the second control plate (361) to open the second opening (32) and close the second discharge port (36). In operation state B, the first metal detection device (33) detects a metal part, while the second metal detection device (34) does not detect a metal part; the first cylinder (351) is activated to drive the first control plate (35) to close the first opening (31) or reduce the cross-section of the conveying pipe to control and reduce the amount of plastic entering the conveying pipe; the second cylinder (362) is activated to drive the second control plate (361) to open the second opening (32) and close the second discharge port (36); In operation state C, both the first metal detection device (33) and the second metal detection device (34) detect metal parts. The first cylinder (351) is activated to drive the first control plate (35) to completely close the first opening (31) to stop the plastic from entering the conveying pipe. The second cylinder (362) is activated to drive the second control plate (361) to close the second opening (32) and open the second discharge port (36). Step 3: Depending on the operating state A, the conveyor belt (50) can be selectively turned on or off; depending on the operating state B and operating state C, the conveyor belt (50) is turned on to transfer the metal parts adsorbed on the conveyor belt (50) to the horizontal pipe (42), and the baffle (45) is used to peel off the metal parts attached to the conveyor belt (50) so that the metal parts fall into the horizontal pipe (42). Step 4: Continuously supply plastic by feeding the plastic into the conveying pipe through the first opening (31) and repeating steps 1-3 to continuously screen the metal parts contained in the plastic.

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