Plastic crusher and crushing method

Abstract

The invention relates to the technical field of pulverizers, in particular to a plastic pulverizer which comprises a machine base, a pulverizing device, a conveying pipeline and a screening pipeline. The screening pipeline is communicated and connected with the material conveying pipeline; the material conveying pipeline and the screening pipeline are provided with a conveying belt, the conveying belt can circularly move between the screening pipeline and the material conveying pipeline through a transmission roller, and the conveying belt is provided with a magnetic component; the invention further relates to a crushing method of the plastic crusher. Compared with the prior art, metal pieces doped in plastic can be automatically screened through cooperation of the conveying belt, the magnetic component and the baffle, so that the labor intensity of operators is reduced, the operation efficiency of the plastic crusher is further improved, and time and labor are saved; the problem that in the prior art, metal pieces are screened manually, and potential safety hazards exist is solved, so that the using reliability and safety of the plastic pulverizer are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of crushers, and in particular to a plastic crusher and a crushing method. Background Art

[0002] During the injection molding process, the plastics in the runner (gate material) and defective products can usually be recycled and crushed for reuse; the plastics of the gate material and defective products are collected and then put into a plastic crusher. After using the plastic crusher to crush these plastics into particles, they are mixed with new materials in proportion for use.

[0003] For the crushing operation, these plastics cannot be crushed with metal or other impurities mixed in to ensure the purity of these plastic particles; for the plastic crusher, it can only crush plastic materials and cannot crush metal materials; however, the inventor found in actual production operations that it is very difficult to avoid the gate material and defective products not being mixed with metal parts during the collection process of the gate material and defective products. At the same time, metal inserts are often provided during product manufacturing. After these metal parts enter the plastic crusher with the plastic, they will accelerate the wear of the crusher blades. Therefore, before these plastics mixed with metal parts are crushed by the blades, the user needs to remove these metal parts by manual operation, and this operation method has a certain degree of safety hazard; at the same time, these metal parts are usually small in size and small in quantity. Using manual labor to screen these metal parts is time-consuming and laborious and affects the operation efficiency of plastic crushing; Therefore, it is necessary to study a new technical solution to solve the above problems. Summary of the Invention

[0004] In view of this, in view of the deficiencies of the existing technology, the main purpose of the present invention is to provide a plastic crusher, which effectively solves the technical problem that the crushing device for crushing plastics in the existing technology needs manual screening of metal parts.

[0005] To achieve the above purpose, the present invention adopts the following technical solution: A plastic crusher includes a machine base; a crushing device, which is arranged on the machine base and is used for crushing plastics; a feeding pipeline, which is arranged on the machine base and is used for feeding materials to the crushing device; wherein, the machine base is provided with a screening pipeline, and the screening pipeline is conductively connected to the feeding pipeline; the feeding pipeline and the screening pipeline are provided with conveyor belts, and the conveyor belts can circulate between the screening pipeline and the feeding pipeline through driving rollers; the conveyor belts are provided with magnetic components, and the screening pipeline is provided with baffles; when the metal parts adsorbed on the conveyor belts enter the screening pipeline, the baffles can strip the metal parts and make them fall into the screening pipeline.

[0006] The beneficial effects of the plastic crusher provided by this application are as follows. When performing plastic crushing operations, plastics are input into the feeding pipeline. At this time, metal parts mixed in the plastics can be adsorbed by the magnetic components of the conveyor belt and enter the screening pipeline along with the movement of the conveyor belt. Finally, the baffle in the screening pipeline strips them from the conveyor belt and drops them into the screening pipeline. Compared with the prior art, firstly, through the cooperation of the conveyor belt, magnetic components, and baffle, it can automatically screen the metal parts mixed in the plastics, thereby reducing the labor intensity of the operators and further improving the operation efficiency of the plastic crusher, saving time and effort. Secondly, it solves the potential safety hazard problems existing in the traditional technology of manually screening metal parts, thereby improving the reliability and safety of the use of the plastic crusher.

[0007] As a preferred solution, the top of the feeding pipeline is provided with a first opening for inputting materials, and the bottom is provided with a second opening for discharging materials to the crushing device. A first metal detection device is provided beside the first opening, and a second metal detection device is provided beside the second opening.

[0008] As a preferred solution, the screening pipeline is arranged in an "L" shape, consisting of a vertical pipeline and a horizontal pipeline. The top of the vertical pipeline has a third opening, which is connected to the feeding pipeline and is located below the first opening. The bottom of the vertical pipeline is connected to the rear end of the horizontal pipeline. The front end of the horizontal pipeline has a fourth opening, which is connected to the feeding pipeline and is located above the second opening. The baffle is installed at a position above the middle of the horizontal pipeline, and the conveyor belt and the baffle are stacked vertically.

[0009] As a preferred solution, a first discharge port is provided on the right side of the horizontal pipeline, and a first storage box is provided on one side of the first discharge port. The horizontal pipeline is equipped with a first inclined plate. One end of the first inclined plate is connected to the upper left end of the horizontal pipeline, and the other end is connected to the bottom of the first discharge port. The baffle is installed on the horizontal pipeline and is located on one side of the area where the first discharge port is located.

[0010] As a preferred solution, a first material control plate is pivotally connected to the top of the feeding pipeline, and the other end of the first material control plate is pivotally connected to a first cylinder. The first cylinder can drive the first material control plate to swing to close the first opening or adjust the size of the first opening. A second discharge port is provided on one side of the bottom of the feeding pipeline. A second material control plate is pivotally connected to the bottom of the first discharge port, and the second material control plate is pivotally connected to a second cylinder. The second cylinder can drive the second material control plate to swing to close the second discharge port or the second opening.

[0011] As a preferred solution, a first material discharge box is provided on one side of the second material discharge port, and a second material storage box is provided on one side of the first material discharge box; The first material storage box contains liquid that can separate plastic from metal parts. The first material storage box is provided with a baffle belt conveyor device, which can lift the plastic in the first material storage box and transfer it to the second material storage box.

[0012] As a preferred solution, the crushing device includes a crushing box, a fixed knife fixedly mounted on the crushing box, a first transmission shaft rotatably mounted on the crushing box, a toothed knife fixedly mounted on the first transmission shaft, a claw knife fixedly mounted on the first transmission shaft, and a first actuator for driving the first transmission shaft to rotate. The top of the crushing box is provided with an upper opening, which is conductively connected to the first opening; the bottom of the crushing box is provided with a lower opening, and the machine base is detachably provided with a first collection box, which is located below the lower opening.

[0013] As a preferred solution, the conveying belt includes a first belt sleeved on a plurality of transmission rollers and a second belt sleeved on the first belt, and the magnetic component is arranged on the first belt; When the first belt and the second belt move to the horizontal pipeline, the baffle can separate the first belt and the second belt; when the first belt and the second belt move to the vertical pipeline and the material conveying pipeline, the second belt is stacked on the first belt.

[0014] As a preferred solution, 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 a side of the second belt facing the first belt; When the first belt and the second belt move to the vertical pipeline and the conveying pipeline, the other part of the magnetic component can be embedded in the first recess; when the first belt and the second belt move to the horizontal pipeline, the baffle can separate the first belt and the second belt and make the magnetic component leave the first recess.

[0015] The present application also provides a pulverizing method of a plastic pulverizer, which is applied to the plastic pulverizer. The pulverizing method comprises the following steps: Step 1, providing plastic, and feeding the plastic into the material delivery pipeline from the first opening; Step 2: The first metal detection device and the second metal detection device perform detection operations. According to the feedback information from the first metal detection device and the second metal detection device, there are three operation states: In operation state A, neither the first metal detection device nor the second metal detection device detects a metal part, the first cylinder is started to drive the first material control plate to open the first opening and the cross section of the material delivery pipeline is adjusted through the first material control plate to control the amount of plastic entering the material delivery pipeline; the second cylinder is started to drive the second material control plate to open the second opening and close the second discharge port; Operating state B: The first metal detection device detects a metal part, while the second metal detection device does not detect a metal part. Start the first cylinder to drive the first material control plate to close the first opening or reduce the cross-sectional area of the material conveying pipeline to control and reduce the amount of plastic entering the material conveying pipeline. Start the second cylinder to drive the second material control plate to open the second opening and close the second material discharge port. Operating state C: Both the first metal detection device and the second metal detection device detect a metal part. Start the first cylinder to drive the first material control plate to completely close the first opening to stop the plastic from entering the material conveying pipeline. Start the second cylinder to drive the second material control plate to close the second opening and open the second material discharge port. Step 3: According to operating state A, the conveyor belt movement can be selectively started or stopped. According to operating states B and C, start the conveyor belt movement to transfer the metal parts adsorbed on the conveyor belt into the horizontal pipeline, and use a baffle to strip the metal parts attached to the conveyor belt to make the metal parts fall into the horizontal pipeline. Step 4: Continuously supply plastic, input the plastic into the material conveying pipeline from the first opening, and repeat steps 1 - 3 to continuously screen the metal parts contained in the plastic.

[0016] The beneficial effects of the plastic crushing method provided by this application are as follows. Compared with the prior art, First, the first detection device and the second detection device can be used to detect whether the plastic in the material conveying pipeline contains metal parts. Cooperating with the first material control plate and the second material control plate, the plastic containing non-magnetic metal parts can be discharged from the second material discharge port, and the magnetic metal parts are adsorbed on the conveyor belt and input into the horizontal pipeline for stripping. Without using manual operation methods, the screening operation of the metal parts in the plastic input into the plastic crusher can be completed, thus ensuring that only plastic participates in the crushing operation and ensuring the purity of the plastic particles after crushing. Second, there is no need to manually screen the metal parts doped in the plastic, which improves the crushing operation efficiency of the plastic crusher, reduces the labor intensity of the operators, saves time and effort. At the same time, the reliability and safety of the plastic crusher can be improved. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the plastic crusher provided by the first embodiment of this application. Figure 2 It isFigure 1 Left view of the plastic crusher shown Figure 3 is Figure 1 Front view of the plastic crusher shown Figure 4 is Figure 1 Schematic diagram of the specific structure of the crushing device of the plastic crusher shown Figure 5 is Figure 1 First cross-sectional view of the plastic crusher shown Figure 6 is Figure 1 Schematic diagram of the specific structure of the horizontal pipe and the first storage tank of the plastic crusher shown Figure 7 is Figure 5 Schematic diagram of the specific structure where the conveyor belt is installed on the feeding pipe, horizontal pipe and vertical pipe Figure 8 is Figure 3 Schematic diagram of the specific structure of the plastic crusher with the first discharge box and the second storage tank Figure 9 Stereo structure diagram of the plastic crusher provided by the second embodiment of the present application Figure 10 is Figure 9 First cross-sectional view of the plastic crusher shown Figure 11 is Figure 10 Schematic diagram of the specific structure where the conveyor belt is installed on the feeding pipe, horizontal pipe and vertical pipe

[0019] Among them, the reference numerals in the figure are as follows: 100, plastic crusher; 10, machine base; 11, first collection box; 12, control box; 20, crushing device; 21, crushing box; 211, upper opening; 212, lower opening; 22, fixed knife; 23, first transmission shaft; 24, toothed knife; 25, claw knife; 26, first actuator; 30, feeding pipe; 31, first opening; 32, second opening; 33, first metal detection device; 34, second metal detection device; 35, first material control plate; 351, first cylinder; 36, second discharge port; 361, second material control plate; 362, second cylinder; 363, first discharge box; 364, second storage tank; 365, baffle belt conveyor; 40, screening pipe; 41, vertical pipe; 42, horizontal pipe; 421, first discharge port; 422, first storage tank; 423, first inclined plate; 43, third opening; 44, fourth opening; 45, baffle; 50. Conveyor belt; 51. First belt; 52. Second belt; 53. Driving roller; 54. Magnetic component; 55. First concave position. Specific embodiments

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer and more understandable, the following further details this application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0021] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0023] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more unless otherwise specifically defined.

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer and more understandable, the following further details the present invention in conjunction with the accompanying drawings and embodiments.

[0025] Before explaining the embodiments of this application in detail, the application scenarios of the embodiments of this application will be described first.

[0026] In the injection molding process of plastic products, the plastic in the runner (gate material) and defective products can usually be recycled and pulverized for reuse. However, metal parts are often embedded in plastic products, and at the same time, when collecting these gate materials and defective products, some metal parts will inevitably be mixed in; once the plastic doped with metal parts enters the plastic pulverizer to participate in the pulverization operation, it will not only result in insufficient purity of the pulverized plastic shell, but also cause wear of the blades due to the participation of these metal parts in the pulverization.

[0027] Please refer to Figures 1 to 11 for an explanation of the plastic crusher 100 provided in multiple embodiments of this application.

[0028] The plastic crusher 100 includes a machine base 10, a crushing device 20 provided on the machine base 10 and used for crushing plastics into plastic particles, a feeding pipeline 30 provided on the machine base 10 and used for feeding plastics to the crushing device 20, and a screening pipeline 40 provided on the machine base 10 and conductively connected to the feeding pipeline 30. The feeding pipeline 30 and the screening pipeline 40 are provided with a conveyor belt 50, and the conveyor belt 50 can circulate between the screening pipeline 40 and the feeding pipeline 30 through a driving roller 53; the conveyor belt 50 is provided with a magnetic component 54, and the screening pipeline 40 is provided with a baffle 45; when the metal piece adsorbed on the conveyor belt 50 is input into the screening pipeline 40, the baffle 45 can strip the metal and drop it into the screening pipeline 40.

[0029] Specifically, when performing plastic crushing operations, plastics are input into the feeding pipeline 30. At this time, the metal pieces doped in the plastics can be adsorbed by the magnetic component 54 of the conveyor belt 50 and enter the screening pipeline 40 along with the movement of the conveyor belt 50. Finally, the baffle 45 in the screening pipeline 40 strips it from the conveyor belt 50 and drops it into the screening pipeline 40; compared with the prior art, on the one hand, it can realize the automatic screening of the metal pieces doped in the plastics through the cooperation of the conveyor belt 50, the magnetic component 54 and the baffle 45, thereby reducing the labor intensity of the operators and further improving the operation efficiency of the plastic crusher 100, saving time and effort; on the other hand, it solves the potential safety hazard problems existing in the traditional technology of using manual screening of metal pieces, thereby improving the reliability and safety of the use of the plastic crusher 100.

[0030] It should be noted here that the magnetic component 54 is a strong magnet bar, and there are multiple magnetic components 54. The multiple magnetic components 54 are spaced along the length direction of the conveyor belt 50, and each magnetic component 54 can extend along the width direction of the conveyor belt 50, so that the entire conveyor belt 50 has magnetism to adsorb the magnetic metal pieces on the conveyor belt 50.

[0031] Please refer to Figures 1 to 8 for 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 machine base 10, a crushing device 20, a feeding pipeline 30, a screening pipeline 40 and a conveyor belt 50.

[0032] In the first embodiment, a first opening 31 for inputting materials is provided at the top of the feeding pipeline 30, and a second opening 32 for discharging the materials into the crushing device 20 is provided at the bottom. A first metal detection device 33 is provided beside the first opening 31, and a second metal detection device 34 is provided beside the second opening 32. The crushing device 20 includes a crushing box 21, a fixed cutter 22 fixedly installed in the crushing box 21, a first transmission shaft 23 rotatably installed in the crushing box 21, a toothed cutter 24 fixedly installed on the first transmission shaft 23, a claw cutter 25 fixedly installed on the first transmission shaft 23, and a first actuator 26 for driving the first transmission shaft 23 to rotate. The top of the crushing box 21 has an upper opening 211, and the upper opening 211 is connected in communication with the first opening 31; the bottom of the crushing box 21 has a lower opening 212, and the machine base 10 is detachably provided with a first collection box 11. The first collection box 11 is located below the lower opening 212, and the first collection box 11 can collect the plastic particles.

[0033] Specifically, when the plastic input 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 cutter 24 and the claw cutter 25 to crush the plastic in the crushing box 21 into particles.

[0034] It should be noted here that the first actuator 26 is a motor, and the motor can control the rotation speed of the first transmission shaft 23 through a frequency converter, so as to adjust the crushing speed according to specific crushing requirements.

[0035] Furthermore, the screening pipeline 40 is arranged in an "L" shape, consisting of a vertical pipeline 41 and a horizontal pipeline 42. The top of the vertical pipeline 41 has a third opening 43, and the third opening 43 is connected in communication with the feeding pipeline 30 and is located below the first opening 31; the bottom of the vertical pipeline 41 is connected in communication with the rear end of the horizontal pipeline 42, and the front end of the horizontal pipeline 42 has a fourth opening 44, and the fourth opening 44 is connected in communication with the feeding pipeline 30 and is located above the second opening 32; a baffle 45 is installed at an upper position in the middle of the horizontal pipeline 42, and the conveyor belt 50 is stacked with the baffle 45 up and down.

[0036] Preferably, the material conveying pipeline 30 has at least a partially inclined area. The inclined area of the material conveying pipeline 30 is inclined forward from top to bottom. The front end of the horizontal pipeline 42 is connected to the lower end of the inclined area of the material conveying pipeline 30 in a communicating manner. The lower end of the vertical pipeline 41 is connected to the rear end of the horizontal pipeline 42 in a communicating manner. The upper end of the vertical pipeline 41 is connected to the upper end of the inclined area of the material conveying pipeline 30 in a communicating manner, so that the inclined area of the material conveying pipeline 30, the horizontal pipeline 42 and the vertical pipeline 41 are arranged in a triangular structure. By providing the inclined area of the material conveying pipeline 30, it is possible to make the plastic parts and metal parts entering the plastic pipeline fall onto the conveyor belt 50 and then fall into the second opening 32, and the inclined area of the material conveying pipeline 30 is used to slow down the falling speed of the plastic parts and metal parts, which is beneficial to improving the reliability of the magnetic metal parts being adsorbed on the conveyor belt 50.

[0037] Specifically, when arranging the driving roller 53 required for the conveyor belt 50 according to the structure of the inclined area of the material conveying pipeline 30, the driving roller 53 needs to be arranged in the inclined area of the material conveying pipeline 30, the horizontal pipeline 42 and the vertical pipeline 41, so that the conveyor belt 50 can circulate to the inclined area of the material conveying pipeline 30, the horizontal pipeline 42 and the vertical pipeline 41.

[0038] In the first embodiment, a first discharge port 421 is provided on the right side of the horizontal pipeline 42, and a first storage tank 422 is provided on one side of the first discharge port 421; a first inclined plate 423 is installed on the horizontal pipeline 42, one end of the first inclined plate 423 is connected to the upper left end of the horizontal pipeline 42, and the other end is connected to the bottom of the first discharge port 421; a baffle 45 is installed on the horizontal pipeline 42 and is located on one side of the area where the first discharge port 421 is located.

[0039] During operation, after the metal parts adsorbed on the conveyor belt 50 enter the horizontal pipeline 42, the baffle 45 strips the metal parts adsorbed on the conveyor belt 50 and makes them fall into the first storage tank 422 under the guiding action of the first inclined surface; there is no need to manually remove the metal parts in the horizontal pipeline 42, saving the shutdown time of the plastic crusher 100, thereby improving the operation efficiency of the plastic crusher 100, and reducing the labor intensity of the operators, saving time and effort.

[0040] Specifically, a first material control plate 35 is pivotally connected to the top of the material conveying pipeline 30. The other end of the first material control plate 35 is pivotally connected to a first air cylinder 351. The first air cylinder 351 can drive the first material control plate 35 to swing to close the first opening 31 or adjust the size of the first opening 31. When plastic is input into the material conveying pipeline 30, once the first metal detection device 33 identifies that there are metal parts in the plastic, it immediately sends the identification signal to the control system of the plastic crusher 100, and the control system starts the first air cylinder 351 to work, driving the first material control plate 35 to close the first opening 31, so as to perform metal screening operation on the plastic that has been input into the material conveying pipeline 30.

[0041] It can be understood that the number of metal parts can also be distinguished according to the signal intensity of the metal parts detected by the first metal detection device 33, and the position of the first material control plate 35 can be controlled according to the number of these metal parts to change the cross-section of the material conveying pipeline 30, slow down the number of plastic parts input to assist in screening metal parts without completely closing the first opening 31. After a certain amount of metal parts are identified, the first material control plate 35 completely closes the first opening 31 to improve the reliability of metal part screening.

[0042] Continuing, a second discharge port 36 is provided on one side of the bottom of the material conveying pipeline 30. The bottom of the first discharge port 421 is pivotally connected to a second material control plate 361. The second material control plate 361 is pivotally connected to a second air cylinder 362. The second air cylinder 362 can drive the second material control plate 361 to swing to close the second discharge port 36 or the second opening 32.

[0043] Before the plastic part falls from the second opening 32, if the second metal detection device 34 can still identify the metal part, 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, and the control system starts the second air cylinder 362 to work, driving the second material control plate 361 to swing to close the second opening 32 and open the second discharge port 36. At this time, the first air cylinder 351 controls the first material control plate 35 to swing to completely close the first opening 31 to stop feeding; thus, the non-magnetic metal parts doped in the plastic part are removed. It can ensure that only plastic parts are input into the crushing device 20, thereby improving the purity of the plastic crushed into plastic particles.

[0044] It can be understood that since the second metal detection device 34 needs to identify whether there are still metal parts in the plastic falling from the second opening 32, the installation position of the second metal detection device 34 needs to be at the intersection of the fourth opening 44 and the second opening 32 to ensure that it can timely identify whether there are still metal parts in the plastic about to fall from the second opening 32 and send the detection signal to the control system, so that the second air cylinder 362 can timely drive the second material control plate 361 to close the second opening 32 and open the second discharge port 36.

[0045] It should be noted here that the first metal detection device 33 and the second metal detection device 34 are metal detectors or metal detectors or metal sensors. For example, a metal sensor disclosed in the authorized announcement of CN105182427B; or a metal detection device disclosed in the authorized announcement of CN216561039U; or some other detectors capable of identifying metal parts, which will not be elaborated here one by one.

[0046] Preferably, a first blanking box 363 is provided on one side of the second blanking port 36, and a second storage box 364 is provided on one side of the first blanking box 363; the first blanking box 363 contains a liquid capable of separating plastic from metal parts. Since the densities of plastic parts and metal parts are different, the plastic parts and metal parts can be separated by the liquid, so that the plastic parts float on the liquid while the metal parts sink to the bottom of the first blanking box 363; the first blanking box 363 is provided with a baffle belt conveyor (not shown in the figure), and the baffle belt conveyor can lift and transfer the plastic in the first blanking box 363 to the second storage box 364 to complete the screening of plastic parts and non-magnetic metal parts. Subsequently, the plastic parts in the second storage box 364 are re-fed into the first opening 31, and this part of the plastic can be crushed.

[0047] It should be noted here that the baffle belt conveyor is also called a lifting conveyor belt or a ribbed conveyor belt. For example, it is a non-sticking vertical lifting corrugated ribbed conveyor belt disclosed in the authorized announcement of the Chinese utility model CN211618972U, or a lifting conveyor belt disclosed in the authorized announcement of the Chinese utility model CN204211013U; this type of baffle belt conveyor belongs to the prior art and will not be elaborated here one by one.

[0048] Please refer to Figures 9 to 11 , which is the specific structure of the plastic crusher 100 provided by the second embodiment of the present application. The structure of the second embodiment of the present application is substantially the same as that of the first embodiment, except that the conveyor belt 50 includes a first belt 51 and a second belt 52.

[0049] In the second embodiment, the first belt 51 is sleeved on a plurality of driving rollers 53, and the second belt 52 is sleeved on the first belt 51; the magnetic member 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 feeding pipe 30, the second belt 52 is stacked on the first belt 51.

[0050] Specifically, the baffle 45 is made of soft iron, silicon steel sheet, acrylic or PVC board. After separating the first belt 51 and the second belt 52 through the baffle 45, the magnetic force generated by the magnetic component 54 on one side of the second belt 52 can be isolated through the baffle 45, so that the second belt 52 has no magnetism when it is in the area covered by the baffle 45, and thus the metal parts attached to the second belt 52 will automatically fall off naturally. This structure can not only improve the reliability of the metal parts falling off, but also ensure that the second belt 52 is not easily worn, thereby extending the service life of the belt.

[0051] Preferably, a part of the magnetic component 54 is embedded in the surface of the first belt 51 facing the second belt 52, and a first concave position 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 feeding pipe 30, the other part of the magnetic component 54 can be embedded in the first concave position 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 make the magnetic component 54 disengage from the first concave position 55.

[0052] Specifically, through the provided first concave position 55, after the magnetic component 54 is embedded in the first concave position 55, a strong magnetism can be provided for 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 concave position 55 can be used to improve the reliability of the first belt 51 driving the second belt 52 to move synchronously, 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.

[0053] It can be understood that since 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 out of the horizontal pipe 42 and move to the vertical pipe 41, the tension force provided by the driving roller 53 for the first belt 51 and the second belt 52 can be utilized, so that the first belt 51 and the second belt 52 are re-overlapped, and a part of the magnetic component 54 is re-embedded in the first concave position 55 to continuously provide magnetic force for the second belt to adsorb magnetic metal parts.

[0054] The present application also provides a crushing method for the plastic crusher 100, including the following steps: Step 1, provide plastic and put the plastic into the feeding pipe 30 from the first opening 31; Step 2, the first metal detection device 33 and the second metal detection device 34 perform detection operations, and there are the following three operating states according to the feedback information of the first metal detection device 33 and the second metal detection device 34: Operating state A: Neither the first metal detection device 33 nor the second metal detection device 34 detects a metal part. 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 pipeline 30 through the first material control plate 35 to control the amount of plastic entering the material conveying pipeline 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 material discharging port 36. Operating state B: The first metal detection device 33 detects a metal part, and 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 material conveying pipeline 30 to control and reduce the amount of plastic entering the material conveying pipeline 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 material discharging port 36. Operating state C: Both the first metal detection device 33 and the second metal detection device 34 detect a metal part. The first cylinder 351 is activated to drive the first material control plate 35 to completely close the first opening 31 to stop the plastic from entering the material conveying pipeline 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 material discharging port 36. Step 3: According to operating state A, the movement of the conveyor belt 50 can be selectively started or stopped. According to operating states B and C, the conveyor belt 50 is activated to transfer the metal parts adsorbed on the conveyor belt 50 into the horizontal pipeline 42, and the baffle 45 is used to strip the metal parts attached to the conveyor belt 50 to make the metal parts fall into the horizontal pipeline 42. Step 4: Continuously supply plastic, put the plastic into the material conveying pipeline 30 from the first opening 31, and repeat steps 1-3 to continuously screen the metal parts contained in the plastic.

[0055] Specifically, on the first hand, it is possible to detect whether the plastic in the material conveying pipeline 30 contains metal parts through the first detection device and the second detection device. Cooperating with the first material control plate 35 and the second material control plate 361, the plastic containing non-magnetic metal parts can be discharged from the second material discharging port 36, and the magnetic metal parts are adsorbed on the conveyor belt 50 and input into the horizontal pipeline 42 for stripping. Without using manual operation methods, the screening operation of the metal parts in the plastic input into the plastic crusher 100 can be completed, so as to ensure that only plastic participates in the crushing operation, thereby ensuring the purity of the plastic particles after crushing. On the second hand, there is no need to manually screen the metal parts doped in the plastic, thereby improving the crushing operation efficiency of the plastic crusher 100, reducing the labor intensity of the operators, saving time and effort. At the same time, the reliability and safety of the use of the plastic crusher 100 can be improved.

[0056] Specifically, in step 2, when the plastic crusher 100 is in operating state B, it can detect the number of metal parts according to the first metal detection device 33, and feed back this information to the control system. The control system starts the first cylinder to drive the first material control plate to swing according to this information, thereby adjusting the cross-section of the feed pipeline, and then controlling the amount of plastic input into the feed pipeline, thereby ensuring that the screening of metal parts can be carried out reliably.

[0057] 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 metal parts, the first cylinder can be started to drive the first material control plate to swing and adjust the cross-section of the material delivery pipeline to control the amount of plastic input.

[0058] More specifically, in step 3, when the plastic crusher is in operating state C, the plastic parts and non-magnetic metal parts fall from the second discharge port into the first discharge box together, and the liquid in the first discharge box makes the plastic parts float on the liquid surface, and makes the metal parts sink to the bottom of the first discharge box, and the baffle belt conveyor device lifts the parts floating on the liquid surface to the second storage box, so that the subsequent parts can be fed into the conveying pipeline for crushing.

[0059] It should be noted here that the control system includes a control box 12 installed on the machine base, and the control box 12 integrates a programmable logic controller, a distributed control system, a power module, relays, contactors and other switching elements. The working status of each component is controlled by the control system. This is a conventional design method for technical personnel in the non-standard field and will not be described here one by one.

[0060] The above are only 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 cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementations of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. A plastic crusher, comprising a machine base (10); a crushing device (20), provided on the machine base (10) and used for crushing plastics; a feeding pipeline (30), provided on the machine base (10) and used for feeding materials to the crushing device (20); It is characterized in that The machine base (10) is provided with a screening pipeline (40), and the screening pipeline (40) is conductively connected to the feeding pipeline (30); a conveyor belt (50) is provided on the feeding pipeline (30) and the screening pipeline (40), and the conveyor belt (50) can circulate between the screening pipeline (40) and the feeding pipeline (30) through a driving roller (53); a magnetic component (54) is provided on the conveyor belt (50), and a baffle (45) is provided on the screening pipeline (40); when the metal parts adsorbed on the conveyor belt (50) are input into the screening pipeline (40), the baffle (45) can strip the metal and make it fall into the screening pipeline (40).

2. The plastic crusher according to claim 1, characterized in that, The top of the feeding pipeline (30) is provided with a first opening (31) for inputting materials, and the bottom is provided with a second opening (32) for feeding the materials to the crushing device (20). A first metal detection device (33) is provided beside the first opening (31), and a second metal detection device (34) is provided beside the second opening (32).

3. The plastic crusher according to claim 2, characterized in that, The screening pipeline (40) is arranged in an "L" shape to form a vertical pipeline (41) and a horizontal pipeline (42). The top of the vertical pipeline (41) has a third opening (43), and the third opening (43) is conductively connected to the feeding pipeline (30) and is located below the first opening (31); The bottom of the vertical pipeline (41) is conductively connected to the rear end of the horizontal pipeline (42). The front end of the horizontal pipeline (42) has a fourth opening (44), and the fourth opening (44) is conductively connected to the feeding pipeline (30) and is located above the second opening (32); The baffle (45) is installed at a position above the middle of the horizontal pipeline (42), and the conveyor belt (50) and the baffle (45) are stacked vertically.

4. The plastic shredder according to claim 3, characterized in that, A first discharge port (421) is provided on the right side of the horizontal pipeline (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 pipeline (42). One end of the first inclined plate (423) is connected to the upper left end of the horizontal pipeline (42), and the other end is connected to the bottom of the first discharge port (421); The baffle (45) is installed on the horizontal pipeline (42) and is located on one side of the area where the first discharge port (421) is located.

5. The plastic crusher according to any one of claims 2-4, characterized in that, A first material control plate (35) is pivotally connected to the top of the feeding pipeline (30), and the other end of the first material control plate (35) is pivotally connected to a first air cylinder (351). The first air cylinder (351) can drive the first material control plate (35) to swing to close the first opening (31) or adjust the size of the first opening (31); A second discharge port (36) is provided on one side of the bottom of the feeding pipeline (30). A second material control plate (361) is pivotally connected to the bottom of the first discharge port (421), and the second material control plate (361) is pivotally connected to a second air cylinder (362). The second air cylinder (362) can drive the second material control plate (361) to swing to close the second discharge port (36) or the second opening (32).

6. The plastic crusher according to claim 5, wherein, A first material discharge box (363) is provided on one side of the second material discharge port (36), and a second material storage box (364) is provided on one side of the first material discharge box (363); The first material discharge box (363) contains liquid capable of separating plastic from metal parts. The first material discharge box (363) is provided with a baffle belt conveyor device, which can lift the plastic in the first material discharge box (363) and transfer it to the second material storage box (364).

7. The plastic crusher according to any one of claims 1-4, characterized in that, The pulverizing device (20) comprises a pulverizing box (21), a fixed knife (22) fixedly mounted on the pulverizing box (21), a first transmission shaft (23) rotatably mounted on the pulverizing box (21), a tooth knife (24) fixedly mounted on the first transmission shaft (23), a claw knife (25) fixedly mounted on the first transmission shaft (23), and a first actuator for driving the first transmission shaft (23) to rotate. The top of the crushing box (21) has an upper opening (211), and the upper opening (211) is conductively connected to the first opening (31); the bottom of the crushing box (21) has a lower opening (212), and the machine base (10) is detachably provided with a first collection box (11), and the first collection box (11) is located below the lower opening (212).

8. The plastic crusher according to claim 3 or 4, characterized in that, The conveying belt (50) comprises a first belt (51) sleeved on a plurality of driving rollers (53) and a second belt (52) sleeved on the first belt (51); the magnetic component (54) is arranged 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 superimposed on the first belt (51).

9. The plastic crusher according to claim 8, characterized in that, A portion of the magnetic component (54) is embedded in a surface of the first belt (51) facing the second belt (52), and a first recess (55) is provided on a 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 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 make the magnetic component (54) detach from the first recess (55).

10. A crushing method for a plastic crusher, applied to the plastic crusher according to any one of claims 1-9, characterized in that, The pulverizing method comprises the following steps, Step 1, providing plastic, and feeding the plastic into the material delivery pipeline from the first opening (31); Step 2: The first metal detection device (33) and the second metal detection device (34) perform detection operations. According to the feedback information from the first metal detection device (33) and the second metal detection device (34), there are the following three operation states: In operating state A, when neither the first metal detection device (33) nor the second metal detection device (34) detects a metal part, 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 pipeline through the first material control plate (35) to control the amount of plastic entering the material conveying pipeline; the second cylinder (362) is activated to drive the second material control plate (361) to open the second opening (32) and close the second material discharging port (36); In operating state B, when the first metal detection device (33) detects a metal part and 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 material conveying pipeline to control the reduction of the amount of plastic entering the material conveying pipeline; the second cylinder (362) is activated to drive the second material control plate (361) to open the second opening (32) and close the second material discharging port (36); In operating state C, when both the first metal detection device (33) and the second metal detection device (34) detect a metal part, the first cylinder (351) is activated to drive the first material control plate (35) to completely close the first opening (31) to stop the plastic from entering the material conveying pipeline; the second cylinder (362) is activated to drive the second material control plate (361) to close the second opening (32) and open the second material discharging port (36); In step 3, according to operating state A, the movement of the conveyor belt (50) can be selectively started or stopped; according to operating states B and C, the conveyor belt (50) is activated to move, and the metal parts adsorbed on the conveyor belt (50) are transferred into the horizontal pipeline (42), and the baffle (45) is used to strip the metal parts attached to the conveyor belt (50) to make the metal parts fall into the horizontal pipeline (42); In step 4, plastic is continuously supplied, the plastic is put into the material conveying pipeline from the first opening (31), and steps 1-3 are repeated to continuously screen the metal parts contained in the plastic.

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