Plastic waste crushing device with dust removal function

Abstract

The plastic waste crushing device with the dust removal function comprises a rack, a material box, a material pressing assembly and a crushing assembly, and the material box comprises a box body, a feeding hopper, a crushing box, a discharging hopper and an exhaust pipe; the material pressing assembly comprises a supporting plate, a lifting power element and a pressing plate. The crushing assembly comprises a first crushing roller and a second crushing roller, the first crushing roller and the second crushing roller are the same in structure, the first crushing roller comprises a first fixing seat, a second fixing seat, a rotating shaft and a sleeve, and the first fixing seat is provided with an air cavity communicating with the inflation mechanism; the rotating shaft is rotationally connected with the first fixing base and the second fixing base and provided with an air inlet groove. The sleeve sleeves the rotating shaft and is provided with an exhaust groove and a plurality of air holes communicated with the exhaust groove, one end of the air inlet groove is communicated with the air cavity, and the other end of the air inlet groove is communicated with the exhaust groove; the air cavity, the air inlet groove, the exhaust groove and the air hole form an air channel. According to the device, air is blown into the crushing box through the air channel, dust of plastic waste is blown away, and heat dissipation of the first crushing roller and the second crushing roller can be accelerated.

Description

Technical Field

[0001] The invention relates to the technical field of plastic crushing, in particular to a plastic waste crushing device with a dust removal function. Background Art

[0002] In order to save energy, plastic waste is generally collected to a certain amount and then simply cleaned and crushed before being reused. During the initial crushing process, dust on the surface of the plastic that has not been cleaned is easily released into the air, thereby affecting the environment in the workshop where the plastic waste is crushed. In order to solve this problem, plastic waste crushers with dust removal functions have appeared on the market. For example, the invention patent with announcement number CN118238319B discloses a plastic waste recycling crusher with dust suppression, including an outer shell, and a closed dust removal mechanism is provided inside the upper end of the outer shell, which suppresses dust by closing the outer shell during the crushing process; the closed dust removal mechanism includes: a lifting box, the lifting box is slidably installed inside the upper end of the outer shell, and a lifting motor is fixedly installed on the top surface of the inner shell above the lifting box, the lower end of the output shaft of the lifting motor is fixedly connected to a lifting rod, and the lower surface of the lifting box is provided with an air intake. The lifting box has a material support baffle fixedly installed inside, and a filter plate is fixedly installed on the inner surface of the lifting box above the material support baffle, and a sliding cleaning brush is installed on the lower surface of the filter plate. An exhaust net is provided on one inner surface of the lifting box, and a fan is installed on the inner surface of the lifting box on the side of the exhaust net. A contact block is fixedly provided on the side surface of the fan facing the filter plate, and a contact rod is fixedly connected to the end of the cleaning brush facing the fan. There are clearance holes on both sides of the upper end of the outer shell, and the two clearance holes are staggered up and down. A filter is provided on the inner surface of the clearance hole on the side of the crushing motor, and a closing plate is fixedly installed on the lower surface of the lifting box. However, the outer surface of the lifting box is in contact with the inner surface of the outer shell, and the side surface of the lifting box is in contact with the lower end of the feed port. Therefore, during the crushing process, the plastic waste cannot be pressed, resulting in low plastic waste crushing efficiency. Summary of the Invention

[0003] Based on this, it is necessary to provide a plastic waste crushing device with dust removal function to address the above problems.

[0004] A plastic waste crushing device with a dust removal function comprises a frame, a material box, a material pressing assembly and a crushing assembly, the material box is installed on the frame, the material box comprises a box body, a feed hopper, a crushing box, a discharge hopper and an exhaust pipe, the box body is installed on the frame, the feed hopper is connected to one side of the box body, one end of the crushing box is connected to the box body, and the other end is connected to the discharge hopper, one end of the exhaust pipe is connected to one side of the box body, and the other end is connected to an exhaust mechanism; the material pressing assembly comprises a support plate, a lifting power element and a pressing plate, the support plate is installed on the box body, the lifting power element is installed on the support plate, the lifting power element is used to drive the pressing plate to rise and fall, and the pressing plate is used to press down the plastic waste; the crushing assembly comprises a first crushing roller and a second crushing roller, the first crushing roller The first and second crushing rollers are both rotatably connected to the crushing box, and the first crushing roller and the second crushing roller cooperate to crush plastic waste; the first crushing roller and the second crushing roller have the same structure, the first crushing roller includes a first fixed seat, a second fixed seat, a rotating shaft and a sleeve, the first fixed seat and the second fixed seat are respectively installed at the two ends of the crushing box, and the first fixed seat is provided with an air cavity connected to the inflation mechanism; the rotating shaft rotatably connects the first fixed seat and the second fixed seat, and the rotating shaft is provided with an air inlet groove; the sleeve is sleeved on the outside of the rotating shaft, and the sleeve is provided with an exhaust groove and a plurality of air holes connected to the exhaust groove, one end of the air inlet groove is connected to the air cavity, and the other end is connected to the exhaust groove; the air cavity, the air inlet groove, the exhaust groove and the air holes form an air duct.

[0005] In one embodiment, the first crushing roller further includes an air nozzle and a plurality of crushing pieces. The air nozzle is mounted on the first fixing seat, one end of the air nozzle is connected to the inflation mechanism, and the other end is connected to the air cavity; each crushing piece is mounted on the sleeve, and the crushing pieces and the air holes are staggered.

[0006] In one embodiment, the first crushing roller further includes two first sealing rings, both of which are mounted on the rotating shaft, and the two first sealing rings respectively correspond to the two sides of one end of the air inlet groove connected to the air cavity; the first sealing ring is used to seal the first fixed seat and the rotating shaft.

[0007] In one embodiment, the first crushing roller further includes two second sealing rings, both of which are mounted on the rotating shaft, and the two second sealing rings respectively correspond to the two sides of one end of the air inlet groove connected to the exhaust groove; the second sealing ring is used to seal the rotating shaft and the sleeve.

[0008] In one embodiment, the first crushing roller further includes two fastening plates, which are used to fix the rotating shaft and one end of the sleeve; the two fastening plates correspond to the two ends of the sleeve respectively.

[0009] In one embodiment, the crushing assembly further includes a crushing power element and a transmission wheel. The crushing power element is used to drive the rotating shaft of the first crushing roller to rotate. There are two transmission wheels. The transmission wheels are installed on the rotating shaft of the first crushing roller and the rotating shaft of the second crushing roller, and the two transmission wheels are engaged.

[0010] In one embodiment, the pressing assembly further comprises a sealing strip mounted on the pressing plate, wherein the sealing strip is arranged along the periphery of the pressing plate; the sealing strip is used to abut against the inner side wall of the crushing box.

[0011] In one embodiment, the pressing assembly further includes a pressure sensor, which is installed on the pressing plate. The pressure sensor is used to detect the pressure applied to the pressing plate, thereby controlling the operation of the lifting power element.

[0012] In one embodiment, the crushing box is further provided with an exhaust port connected to the exhaust pipe, and the material box further includes a filter that can be detachably mounted on the crushing box, and the filter is arranged corresponding to the exhaust port.

[0013] In one embodiment, the exhaust port corresponds to the top of the first crushing roller.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The plastic waste crushing device with dust removal function of the present invention presses down the plastic waste by a pressing plate to improve the crushing efficiency; an air channel is formed by an air cavity, an air inlet groove, an exhaust groove and an air hole to blow air into the crushing box to blow away the dust of the plastic waste, and can accelerate the heat dissipation of the first crushing roller and the second crushing roller, and the air flow carrying dust and heat is then discharged through the exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a plastic waste crushing device with dust removal function according to an embodiment of the present invention; Figure 2 for Figure 1 Sectional view along line AA; Figure 3 for Figure 1 A schematic diagram of the structure of a pulverizing assembly in a plastic waste pulverizing device with a dust removal function is shown, wherein the pulverizing power element is not shown; Figure 4 for Figure 3 Cross-sectional view along line BB; Figure 5 for Figure 4 Enlarged view of circle C in the middle.

[0016] The meanings of the numbers in the accompanying drawings are: 100. Plastic waste crushing device with dust removal function; 10. Frame; 20. Material box; 21. Box body; 211. Feed port; 22. Feed hopper; 23. Crushing box; 24. Discharge hopper; 25. Exhaust pipe; 26. Filter; 30. Pressing assembly; 31. Support plate; 32. Lifting power element; 33. Pressing plate; 34. Sealing strip; 40. Crushing assembly; 41. First crushing roller; 411. First fixed seat; 4110. Air cavity; 412. Second fixed seat; 413. Rotating shaft; 4130. Air inlet groove; 414. Sleeve; 4141. Exhaust groove; 4142. Air hole; 415. Air nozzle; 416. Crushing piece; 417. First sealing ring; 418. Second sealing ring; 419. Fastening piece; 42. Second crushing roller; 43. Crushing power element; 44. Transmission wheel; 45. Bearing. DETAILED DESCRIPTION

[0017] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 should not be understood as limiting the present invention.

[0019] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0020] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0021] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0023] Please refer to Figures 1 to 5, is an embodiment of the invention of a plastic waste shredding device 100 with a dust removal function, comprising a frame 10, a material box 20, a material pressing assembly 30 and a shredding assembly 40. The material box 20 is mounted on the frame 10 and comprises a box body 21, a feed hopper 22, a shredding box 23, a discharge hopper 24 and an exhaust pipe 25. The box body 21 is mounted on the frame 10, the feed hopper 22 is connected to one side of the box body 21, one end of the shredding box 23 is connected to the box body 21, and the other end is connected to the discharge hopper 24. One end of the exhaust pipe 25 is connected to one side of the box body 21, and the other end is connected to the exhaust mechanism; the pressing assembly 30 includes a support plate 31, a lifting power element 32 and a pressing plate 33, the support plate 31 is installed on the box body 21, and the lifting power element 32 is installed on the support plate 31, the lifting power element 32 is used to drive the pressing plate 33 to move up and down, and the pressing plate 33 is used to press down the plastic waste; the crushing assembly 40 includes a first crushing roller 41 and a second crushing roller 42, the first crushing roller 41 and the second crushing roller 42 are both rotatably connected to the crushing box 23, and the first crushing roller 41 and the second crushing roller 42 cooperate to crush the plastic waste; the first crushing roller 41 and the second crushing roller 42 have the same structure, the first crushing roller 41 includes a first fixed seat 411, a second fixed seat 412, a rotating shaft 413 and a sleeve 414, the first fixed seat 411 and the second fixed seat 412 are respectively installed at both ends of the crushing box 23, and the first fixed seat 411 is provided with an air cavity 4110 connected to the inflation mechanism; the rotating shaft 4 The first fixing base 411 and the second fixing base 412 are rotatably connected. The rotating shaft 413 is provided with an air inlet groove 4130. The sleeve 414 is sleeved on the outer side of the rotating shaft 413. The sleeve 414 is provided with an exhaust groove 4141 and a plurality of air holes 4142 connected to the exhaust groove 4141. One end of the air inlet groove 4130 is connected to the air cavity 4110, and the other end is connected to the exhaust groove 4141. The air cavity 4110, the air inlet groove 4130, the exhaust groove 4141, and the air holes 4142 form an air passage. The plastic waste pulverizing device 100 with dust removal function presses down the plastic waste through the pressing plate 33 to improve the pulverizing efficiency; an air channel is formed through the air cavity 4110, the air inlet groove 4130, the exhaust groove 4141 and the air hole 4142, and air is blown into the pulverizing box 23 to blow away the dust of the plastic waste, and can accelerate the heat dissipation of the first pulverizing roller 41 and the second pulverizing roller 42. The air flow carrying dust and heat is then discharged through the exhaust pipe 25.

[0024] like Figure 1 and Figure 2As shown, in this embodiment, the material bin 20 is mounted on the frame 10 and includes a housing 21, a feed hopper 22, a crushing box 23, a discharge hopper 24, and an exhaust pipe 25. The housing 21 is mounted on the frame 10, and the feed hopper 22 is connected to one side of the housing 21, through which the material is fed into the housing 21. Optionally, a feed port 211 is provided on one side of the housing 21, and the feed hopper 22 is provided corresponding to the feed port 211. One end of the crushing box 23 is connected to the housing 21, and the other end is connected to the discharge hopper 24. One end of the exhaust pipe 25 is connected to one side of the housing 21, and the other end is connected to the exhaust mechanism. Optionally, the crushing box 23 is also provided with an exhaust port (not shown) connected to the exhaust pipe 25. Furthermore, the material bin 20 also includes a filter 26 that is detachably mounted on the crushing box 23. The filter 26 is provided corresponding to the exhaust port to prevent the plastic waste from being discharged through the exhaust port.

[0025] Please check again Figure 1 and Figure 2 The pressing assembly 30 includes a support plate 31, a lifting power element 32 and a pressing plate 33. The support plate 31 is installed on the box body 20, and the lifting power element 32 is installed on the support plate 31. The lifting power element 32 is used to drive the pressing plate 33 to move up and down, and the pressing plate 33 is used to press down the plastic waste; when feeding, the pressing plate 33 is in the feeding position. At this time, the pressing plate 33 is located at the top of the feeding port 211 so that the plastic waste enters the box body 21. When crushing, the pressing plate 33 drops to the bottom of the feeding port 211 to prevent the plastic waste from being discharged through the feeding port 211; optionally, the lifting power element 32 is a motor; further, the pressing assembly 30 also includes a pressure sensor (not shown in the figure), which is installed on the pressing plate 33. The pressure sensor is used to detect the pressure exerted on the pressing plate 33, thereby controlling the operation of the lifting power element 32; the pressure sensor and the lifting power element 32 are both connected to the controller signal. Optionally, the pressure sensor is a prior art. When the pressure sensor's feedback reaches a preset value as the pressure plate 33 descends, the lifting element 32 stops descending. During the crushing process, as some of the plastic waste is crushed into fine particles, the pressure on the pressure plate 33 decreases. When the pressure sensor's feedback does not reach the preset value, the lifting element 32 continues descending, thereby keeping the plastic waste compressed and improving crushing efficiency. The stroke of the lifting element 32 is set to control the threshold for the lifting of the pressure plate 33, preventing it from contacting the crushing assembly 40.

[0026] In one embodiment, the pressing assembly 30 further includes a sealing strip 34 mounted on the pressing plate 33, and the sealing strip 34 is arranged along the periphery of the pressing plate 33; the sealing strip 34 is used to abut against the inner wall of the crushing box 23, which can not only prevent dust from flying into the box body 21, but also scrape off the dust on the inner wall of the crushing box 23 as the pressing plate 33 descends; optionally, the sealing strip 34 is a rubber strip.

[0027] like Figures 2 to 5As shown, the crushing assembly 40 includes a first crushing roller 41 and a second crushing roller 42, and the first crushing roller 41 and the second crushing roller 42 are both rotatably connected to the crushing box 23, and the first crushing roller 41 and the second crushing roller 42 cooperate to crush the plastic waste; the first crushing roller 41 and the second crushing roller 42 have the same structure, and the following mainly introduces the first crushing roller 41; the first crushing roller 41 includes a first fixed seat 411, a second fixed seat 412, a rotating shaft 413 and a sleeve 414, and the first fixed seat 411 and the second fixed seat 412 are respectively installed at both ends of the crushing box 23, and the first fixed seat 411 is provided with an air cavity 4110 connected to the inflation mechanism; the rotating shaft 413 is rotatably connected to the first The fixed base 411 and the second fixed base 412 are provided with an air inlet groove 4130 on the rotating shaft 413. A sleeve 414 is sleeved on the outside of the rotating shaft 413 and is provided with an exhaust groove 4141 and multiple air holes 4142 connected to the exhaust groove 4141. One end of the air inlet groove 4130 is connected to the air cavity 4110, and the other end is connected to the exhaust groove 4141. The air cavity 4110, the air inlet groove 4130, the exhaust groove 4141, and the air holes 4142 form an air channel for blowing air into the crushing box 23. As the rotating shaft 413 rotates, the air holes 4142 blow air in different directions, thereby agitating the dust in the crushing box 23 and making it float, thereby facilitating its discharge into the exhaust pipe 25. Optionally, the exhaust port corresponds to the top of the first crushing roller 41, and the maximum travel position of the pressing plate 33 is located at the top of the exhaust port to prevent the exhaust port from being exposed and causing a layer of dust to be discharged into the box 2120.

[0028] Optionally, the first pulverizing roller 41 further includes an air nozzle 415 and a plurality of pulverizing blades 416. The air nozzle 415 is mounted on the first fixed seat 411, with one end of the air nozzle 415 connected to the inflation mechanism and the other end connected to the air cavity 4110. Each pulverizing blade 416 is mounted on the sleeve 414, and the pulverizing blades 416 and the air holes 4142 are arranged in an interlaced manner. In one embodiment, the pulverizing blades 416 of the first pulverizing roller 41 are arranged in an interlaced manner with the pulverizing blades of the second pulverizing roller 42 to achieve the pulverization of plastic waste. Furthermore, the first pulverizing roller 41 further includes two first sealing rings 417, both mounted on the rotating shaft 413. The two first sealing rings 417 correspond to either side of one end of the air inlet groove 4130 connected to the air cavity 4110. The first sealing rings 417 are used to seal the first fixed seat 411 and the rotating shaft 413 to improve airtightness. The first pulverizing roller 41 also includes two second sealing rings 418, each mounted on the rotating shaft 413. The two second sealing rings 418 correspond to either side of one end of the air inlet groove 4130 that connects to the exhaust groove 4141. The second sealing rings 418 are used to seal the rotating shaft 413 and the sleeve 414, improving airtightness. In one embodiment, the first pulverizing roller 41 also includes two fastening tabs 419, which are used to secure the rotating shaft 413 to one end of the sleeve 414. The two fastening tabs 419 correspond to either end of the sleeve 414 to define the position of the sleeve 414.

[0029] like Figure 1 As shown, the crushing assembly 40 also includes a crushing power element 43 and a transmission wheel 44. The crushing power element 43 is mounted on the frame 10. The crushing power element 43 is used to drive the rotation shaft 413 of the first crushing roller 41. There are two transmission wheels 44, each mounted on the rotation shaft 413 of the first crushing roller 41 and the rotation shaft of the second crushing roller 42. The two transmission wheels 44 are meshed. The crushing power element 43 drives the rotation shaft 413 of the first crushing roller 41, and under the action of the two transmission wheels 44, the rotation shaft of the second crushing roller 42 is synchronously rotated. Optionally, the transmission wheel 44 is a gear. The crushing assembly 40 also includes a plurality of bearings 45. Bearings 45 are mounted on both the first fixed seat 411 and the second fixed seat 412, and the bearings 45 are passed through the rotation shaft 413.

[0030] During use, the pressing plate 33 is located at the feeding position, and the plastic waste enters the box body 21 through the feed hopper 22 and then enters the crushing box 23; when crushing is required, the pressing plate 33 drops until the pressure value fed back by the pressure sensor reaches the preset pressure value. At this time, the sealing strip 34 abuts the inner wall of the crushing box 23; then, the crushing power element 43, the inflation mechanism and the exhaust mechanism are started, and the crushing power element 43 drives the first crushing roller 41 and the second crushing roller 42 to rotate, thereby crushing the plastic waste; at the same time, the air flow of the inflation mechanism enters the crushing box 23 through the air cavity 4110, the air inlet groove 4130, the exhaust groove 4141 and the air hole 4142, and the air flow blows towards the plastic waste to blow away the dust on the plastic waste. The air flow can also take away the heat generated by the crushing piece 416 due to friction with the plastic waste, thereby accelerating the heat dissipation of the crushing piece 416. Because the plastic waste is randomly stacked in the crushing box 23, there are gaps between the plastic waste and between the crushing pieces 416 and the crushing box 23. Under the action of the air extraction mechanism, the airflow carrying dust and heat is discharged through these gaps to the exhaust pipe 25. Moreover, as the rotating shaft 413 rotates, the air holes 4142 blow air in different directions, thereby stirring the dust in the crushing box 23 and making it float, which is convenient for discharge to the exhaust pipe 25. Finally, the crushed plastic waste particles are discharged through the discharge hopper 24.

[0031] The plastic waste pulverizing device 100 with dust removal function of the present invention presses down the plastic waste through the pressing plate 33 to improve the pulverizing efficiency; an air channel is formed through the air cavity 4110, the air inlet groove 4130, the exhaust groove 4141 and the air hole 4142, and air is blown into the pulverizing box 23 to blow away the dust of the plastic waste, and can accelerate the heat dissipation of the first pulverizing roller 41 and the second pulverizing roller 42. The air flow carrying dust and heat is then discharged through the exhaust pipe 25.

[0032] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0033] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A plastic waste crushing device with dust removal function, characterized in that: The machine comprises a frame, a material box, a material pressing assembly and a crushing assembly, wherein the material box is installed on the frame, the material box comprises a box body, a feed hopper, a crushing box, a discharge hopper and an exhaust pipe, the box body is installed on the frame, the feed hopper is connected to one side of the box body, one end of the crushing box is connected to the box body, and the other end is connected to the discharge hopper, one end of the exhaust pipe is connected to one side of the box body, and the other end is connected to the exhaust mechanism; the material pressing assembly comprises a support plate, a lifting power element and a pressing plate, the support plate is installed on the box body, the lifting power element is installed on the support plate, the lifting power element is used to drive the pressing plate to rise and fall, and the pressing plate is used to press down plastic waste; the crushing assembly comprises a first crushing roller and a second crushing roller, the first crushing roller and the second crushing roller are both Rotatably connected to the crushing box, the first crushing roller and the second crushing roller cooperate to crush plastic waste; the first crushing roller and the second crushing roller have the same structure, the first crushing roller includes a first fixed seat, a second fixed seat, a rotating shaft and a sleeve, the first fixed seat and the second fixed seat are respectively installed at the two ends of the crushing box, and the first fixed seat is provided with an air cavity connected to the inflation mechanism; the rotating shaft rotatably connects the first fixed seat and the second fixed seat, and the rotating shaft is provided with an air inlet groove; the sleeve is sleeved on the outside of the rotating shaft, and the sleeve is provided with an exhaust groove and a plurality of air holes connected to the exhaust groove, one end of the air inlet groove is connected to the air cavity, and the other end is connected to the exhaust groove; the air cavity, the air inlet groove, the exhaust groove and the air holes form an air duct.

2. The plastic waste crushing device with dust removal function according to claim 1 is characterized in that: The first crushing roller also includes an air nozzle and a plurality of crushing pieces. The air nozzle is installed on the first fixed seat. One end of the air nozzle is connected to the inflation mechanism, and the other end is connected to the air cavity. Each crushing piece is installed on the sleeve, and the crushing pieces and the air holes are arranged alternately.

3. The plastic waste crushing device with dust removal function according to claim 1 is characterized in that: The first crushing roller also includes two first sealing rings, both of which are installed on the rotating shaft. The two first sealing rings correspond to the two sides of one end of the air inlet groove connected to the air cavity; the first sealing ring is used to seal the first fixed seat and the rotating shaft.

4. The plastic waste crushing device with dust removal function according to claim 1, characterized in that: The first crushing roller also includes two second sealing rings, which are both installed on the rotating shaft. The two second sealing rings correspond to the two sides of one end of the air inlet groove connected to the exhaust groove; the second sealing ring is used to seal the rotating shaft and the sleeve.

5. The plastic waste crushing device with dust removal function according to claim 1, characterized in that: The first crushing roller further includes two fastening plates, which are used to fix the rotating shaft and one end of the sleeve; the two fastening plates correspond to the two ends of the sleeve respectively.

6. The plastic waste crushing device with dust removal function according to claim 1, characterized in that: The crushing assembly also includes a crushing power element and a transmission wheel. The crushing power element is used to drive the rotating shaft of the first crushing roller to rotate. There are two transmission wheels. The rotating shafts of the first crushing roller and the second crushing roller are both equipped with the transmission wheels, and the two transmission wheels are engaged.

7. The plastic waste crushing device with dust removal function according to claim 1, characterized in that: The pressing assembly further comprises a sealing strip mounted on the pressing plate, wherein the sealing strip is arranged along the circumference of the pressing plate; the sealing strip is used to abut against the inner side wall of the crushing box.

8. The plastic waste crushing device with dust removal function according to claim 1, characterized in that: The pressing assembly further includes a pressure sensor, which is installed on the pressing plate. The pressure sensor is used to detect the pressure applied to the pressing plate, thereby controlling the operation of the lifting power element.

9. The plastic waste crushing device with dust removal function according to claim 1, characterized in that: The crushing box is further provided with an exhaust port connected to the exhaust pipe, and the material box further includes a filter that can be detachably mounted on the crushing box, and the filter is arranged corresponding to the exhaust port.

10. The plastic waste crushing device with dust removal function according to claim 9, characterized in that: The exhaust port corresponds to the top of the first pulverizing roller.

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