Plastic crushing processing device for waste plastic recovery

Abstract

The invention relates to the technical field of renewable resource recycling treatment, and particularly discloses a plastic crushing processing device for waste plastic recycling, the plastic crushing processing device comprises a crushing box and a feeding box, the feeding box is fixedly arranged at the top of the crushing box, and an electric rotating shaft is rotatably arranged on the rear side of the top of the feeding box; and a movable cover plate is rotationally arranged on one side of the electric rotating shaft. The movable cover plate is controlled to turn over and reset through the electric rotating shaft, and the top of the feeding box is sealed through the movable cover plate, so that outward dissipation of dust in the plastic crushing and processing process is reduced, and the environmental protection property of the crushing and processing device during operation and use is improved; in the feeding box, firstly, two coarse crushing rollers are used for performing coarse crushing treatment on plastics, then multiple groups of fine crushing rollers in the fixing frame are used for performing fine crushing treatment on the plastics subjected to coarse crushing treatment, and through the arrangement of a two-stage crushing structure, the crushing processing efficiency of waste plastics is also improved while the plastic crushing effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of renewable resource recovery and processing, and in particular to a plastic crushing and processing device for recycling waste plastics. Background Art

[0002] Most of the existing waste plastic crushing and processing devices are limited to simple mechanical crushing, which has low crushing efficiency and serious environmental pollution. The plastics cannot be effectively classified after crushing, which increases the burden of post-processing. In addition, the existing technology has shortcomings in crusher feeding and dust control. Some equipment uses manual feeding, which is inefficient and easily causes dust to escape, endangering the environment and the health of operators. Other equipment passively collects dust, which is inefficient and has the risk of secondary dust escape.

[0003] In addition, the existing waste plastic crushing and processing equipment lacks an efficient automatic sorting system. The crushed plastic particles are mixed together, making it difficult to effectively classify them, which increases the subsequent logistics costs and processing difficulties. There is an urgent need for a plastic crushing and processing device that can effectively improve crushing efficiency, reduce environmental pollution, and achieve automatic sorting. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a plastic crushing and processing device for recycling waste plastics, in order to solve the above-mentioned technical defects.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a plastic crushing and processing device for recycling waste plastics, comprising a crushing box and a feed box, the top of the crushing box is fixedly provided with a feed box, the rear side of the top of the feed box is rotatably provided with an electric shaft, and one side of the electric shaft is rotatably provided with a movable cover plate, both sides of the inside of the feed box are fixedly provided with guide plates, and two coarse crushing rollers are rotatably provided at the lower part of the inside of the feed box, a fixed frame is also fixedly provided at the bottom of the feed box, and a plurality of fine crushing rollers are rotatably provided inside the fixed frame, a crushing motor is fixedly provided on the front of the feed box, and one end of the output shaft of the crushing motor is fixedly connected to one end of one of the coarse crushing rollers; The crushing box is also provided with a sorting mechanism inside, and the sorting mechanism includes an air sorting frame and an electrostatic sorting frame. The electrostatic sorting frame is fixedly provided at the bottom of the crushing box, and the air sorting frame is fixedly provided on the top of the electrostatic sorting frame. The top of the air sorting frame contacts the bottom of the feed box, and a plurality of air sorting channels are provided inside the air sorting frame. The first blanking channel and the second blanking channel are respectively provided at the upper and lower parts of the left side of the inner wall of the plurality of air sorting channels, and the upper and lower parts of the right side of the inner wall of the air sorting channel are respectively provided with blowing frames, wherein the blowing directions of the two blowing frames are respectively toward the inside of the first blanking channel and the second blanking channel; The front and rear sides of the electrostatic separation frame are respectively fixedly provided with a positive electrode plate and a negative electrode plate, and the front and rear sides of the inner wall of the electrostatic separation frame are both provided with a drop opening.

[0006] Furthermore, one end of the two coarse crushing rollers is driven by gears, and the fine crushing rollers arranged inside the fixed frame are grouped in pairs, and there are three groups of fine crushing rollers arranged inside the fixed frame, and one end of the two fine crushing rollers in each group is driven by gears, and one end of one of the fine crushing rollers is connected to the output shaft of the crushing motor through a pulley.

[0007] Furthermore, an air pump is provided at the bottom of the dust box, and the air outlet of the air pump is connected to the interior of the two upper and lower blowing racks through air guide pipes, and the air inlet ends of the two upper and lower blowing racks are both provided with air pressure valves.

[0008] Furthermore, a plurality of first material drop racks and second material drop racks are provided at the bottom of the air selection rack, and inclined grooves are provided inside the first material drop racks and the second material drop racks, the interiors of the plurality of first material drop racks are respectively connected with the bottoms of the plurality of first material drop channels, the interiors of the plurality of second material drop racks are respectively connected with the bottoms of the plurality of second material drop channels, a first material guide pipe is fixedly provided on one side of the bottom of the plurality of first material drop racks, and the interiors of the first material guide pipe are respectively connected with the low sides of the inclined grooves inside the plurality of first material drop racks, a second material guide pipe is fixedly provided on one side of the bottom of the plurality of second material drop racks, and the interiors of the second material guide pipe are respectively connected with the low sides of the inclined grooves inside the plurality of second material drop racks, and one side of the first material guide pipe and the second material guide pipe both extend to the outside of the crushing box.

[0009] Furthermore, automatic control valves are provided inside the two material drop ports, and third material guide racks are provided at the bottom of the two material drop ports, discharge troughs are provided inside the two third material guide racks, and one side of the two third material guide racks extends to the outside of the crushing box.

[0010] Furthermore, a material pressing assembly is arranged inside the feed box, and the material pressing assembly includes a movable material pressing plate and a telescopic material pressing plate. The movable material pressing plate is movably arranged at the bottom of the movable cover plate, and telescopic material pressing plates are slidably arranged on both sides of the movable material pressing plate. A servo electric cylinder is fixedly arranged on the top of the movable cover plate, and the driving end of the servo electric cylinder is fixedly connected to the top of the movable material pressing plate.

[0011] Furthermore, a dust suction assembly is also provided at the bottom of the movable cover plate, and the dust suction assembly includes two dust suction protective plates, dust suction protective plates are fixedly provided on both sides of the bottom of the movable cover plate, and a plurality of dust suction ports are provided on opposite sides of the two dust suction protective plates, a dust collecting box is fixedly provided on the back of the crushing box, and a dust suction pump is fixedly provided on the top of the dust collecting box, and the air inlet end of the dust suction pump is connected to the interior of the two dust suction protective plates through a dust suction pipe.

[0012] Furthermore, the pulverizing method of the plastic pulverizing device for recycling waste plastics is as follows: When the waste plastics are crushed, the front side of the movable cover is turned upward by controlling the electric shaft on one side of the top of the feed box, so that the top of the feed box is in an open state. At this time, a certain amount of waste plastics is fed into the feed box. After the waste plastics are fed, the movable cover is turned and reset by controlling the electric shaft, and the top of the feed box is closed by the movable cover. When the waste plastics are crushed, the driving end of the servo electric cylinder controls the movable pressing plate to move downward continuously, and the movable pressing plate and two telescopic pressing plates are used to push the waste plastics in the feed box downward until all the waste plastics in the feed box are crushed by the coarse crushing rollers. When feeding the waste plastics, with the flipping control of the movable cover, the two dust suction protection plates rotate to the two sides of the feed box opening respectively. When the waste plastics are introduced into the feed box, the dust at the feed box opening is sucked away by the dust suction pump in cooperation with the two dust suction protection plates. After the waste plastics are crushed inside the feed box, the plastic crushed materials fall into several air separation channels inside the air separation frame respectively, and the plastic crushed materials are blown to the first blanking channel and the second blanking channel respectively through the upper and lower blowing frames inside the air separation channel. The blowing pressure of the upper blowing frame is lower than that of the lower blowing frame. Therefore, the light crushed materials in the plastic crushed materials are air-selected and recovered through the first blanking channel, and the medium crushed materials in the plastic crushed materials are air-selected and recovered through the second blanking channel. Finally, the heavy crushed materials fall into the electrostatic sorting frame through the bottom of the air separation channel; The plastic shreds falling from the bottom of the air separation channel enter the interior of the electrostatic sorting rack. At this time, the positive plate and the negative plate are energized respectively to form an electrostatic field inside the electrostatic sorting rack, giving the plastic shreds different charges, so that they are subjected to different electric field forces in the electric field, so that the positively charged plastic shreds are attracted to one side of the negative plate, and the negatively charged plastic shreds are attracted to one side of the positive plate. Finally, the positive plate and the negative plate are powered off, and the automatic control valves inside the two drop ports are opened at the same time, so that the plastic shreds on the positive plate and the negative plate side are respectively sent out through the two third material guide racks, thereby realizing automatic sorting and processing of the plastic shreds.

[0013] The beneficial effects achieved by the present invention using the above structure are as follows: 1. In the present invention, after the feeding of waste plastics is completed, the movable cover is controlled by the electric rotating shaft to flip and reset, and the top of the feed box is closed by the movable cover, so as to reduce the dust emission during the plastic crushing process and improve the environmental protection of the crushing device during operation. The plastic is firstly crushed by two coarse crushing rollers inside the feed box, and then the coarsely crushed plastic is finely crushed by multiple groups of fine crushing rollers inside the fixed frame. Through the setting of the two-stage crushing structure, while improving the crushing effect of the plastic, the crushing efficiency of the waste plastic is also improved.

[0014] 2. In the present invention, when the waste plastics are being crushed, the driving end of the servo electric cylinder is used to control the movable pressing plate to move downward continuously, and the movable pressing plate and two telescopic pressing plates are used to push the waste plastics inside the feed box downward until all the waste plastics inside the feed box are coarsely crushed by the coarse crushing roller. The arrangement of the movable pressing plate and the telescopic pressing plate inside the feed box can greatly improve the crushing efficiency of the waste plastics, and effectively solve the problem of difficulty in feeding the waste plastics when they are crushed inside the feed box.

[0015] 3. In the present invention, when feeding waste plastics, with the flipping control of the movable cover plate, the two dust suction protective plates are respectively rotated to the two sides of the feed box opening. When the waste plastics are introduced into the feed box, the dust at the feed box opening is sucked away by the dust suction pump in cooperation with the two dust suction protective plates, thereby ensuring that the dust of the waste plastics is dispersed when entering the feed box, thereby greatly improving the environmental protection of the plastic crushing processing device.

[0016] 4. In the present invention, the light-weight crushed materials in the plastic crushed materials are air-selected and recovered through the first feeding channel, the medium-weight crushed materials in the plastic crushed materials are air-selected and recovered through the second feeding channel, and finally the heavy-weight crushed materials fall into the interior of the electrostatic sorting rack through the bottom of the air-selecting channel, thereby completing the automatic sorting process of the plastic crushed materials, recycling different types of plastic crushed materials, and reducing the difficulty of sorting operation after crushing; and combining with the electrostatic field formed inside the electrostatic sorting rack, different charges are given to the plastic crushed materials, so that they are subjected to different electric field forces in the electric field, so that the plastic crushed materials with positive charge are attracted to one side of the negative plate, and the plastic crushed materials with negative charge are attracted to one side of the positive plate, and finally the positive plate and the negative plate are powered off, and the automatic control valves inside the two feeding ports are opened at the same time, so that the plastic crushed materials on the positive plate and the negative plate sides are respectively sent out through the two third material guide racks, thereby realizing further sorting process of the plastic crushed materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 This is a schematic diagram of a plastic crushing and processing device structure for recycling waste plastics according to an embodiment of the present invention; Figure 2 It is a schematic diagram of the structure of a crushing box and a dust collecting box according to an embodiment of the present invention; Figure 3 It is a schematic diagram of the internal structure of the feed box according to an embodiment of the present invention; Figure 4 It is a schematic diagram of the structure of the coarse crushing roller and the fine crushing roller according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the internal structure of the air separation frame according to an embodiment of the present invention; Figure 6 It is a schematic diagram of the structure of the air separation rack and the electrostatic separation rack according to an embodiment of the present invention.

[0018] In the figure, 1. crushing box; 2. feeding box; 3. movable cover plate; 4. electric rotating shaft; 5. dust protection plate; 6. movable pressing plate; 7. telescopic pressing plate; 8. servo electric cylinder; 9. dust collecting box; 10. dust pump; 11. guide plate; 12. coarse crushing roller; 13. fixed frame; 14. fine crushing roller; 15. crushing motor; 16. air selection frame; 17. air selection channel; 18. first blanking channel; 19. second blanking channel; 20. blowing frame; 21. first blanking frame; 22. second blanking frame; 23. first guide pipe; 24. second guide pipe; 25. electrostatic sorting frame; 26. positive plate; 27. negative plate; 28. blanking port; 29. ​​third guide frame. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the 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 cannot be understood as a limitation on the present invention.

[0021] Embodiment 1: See also Figures 1 to 6 As shown, a plastic pulverizing and processing device for recycling waste plastics comprises a pulverizing box 1 and a feed box 2, the feed box 2 is fixedly arranged on the top of the pulverizing box 1, an electric rotating shaft 4 is rotatably arranged on the rear side of the top of the feed box 2, and a movable cover plate 3 is rotatably arranged on one side of the electric rotating shaft 4, guide plates 11 are fixedly arranged on both sides of the inside of the feed box 2, and two coarse pulverizing rollers 12 are rotatably arranged at the lower part of the inside of the feed box 2, a fixing frame 13 is also fixedly arranged at the bottom of the feed box 2, and a plurality of fine pulverizing rollers 14 are rotatably arranged inside the fixing frame 13, a pulverizing motor 15 is fixedly arranged on the front of the feed box 2, and one end of the output shaft of the pulverizing motor 15 is fixedly connected to one end of one of the coarse pulverizing rollers 12; Specifically, one end of the two coarse grinding rollers 12 is driven by gears, and the fine grinding rollers 14 arranged inside the fixed frame 13 are grouped in pairs. There are three groups of fine grinding rollers 14 arranged inside the fixed frame 13, and one end of the two fine grinding rollers 14 in each group is driven by gears, and one end of one of the fine grinding rollers 14 is connected to the output shaft of the grinding motor 15 through a pulley.

[0022] It should be noted that a coarse crushing gap is provided between the two coarse crushing rollers 12, and a fine crushing gap is provided between the two fine crushing rollers 14 in each group. When the waste plastics are crushed, the front side of the movable cover 3 is controlled to flip upward by the electric rotating shaft 4 on one side of the top of the feed box 2, so that the top of the feed box 2 is in an open state. At this time, a certain amount of waste plastics is fed into the feed box 2. After the feeding of the waste plastics is completed, the movable cover 3 is controlled by the electric rotating shaft 4 to flip and reset, and the top of the feed box 2 is closed by the movable cover 3, thereby reducing the dust from the plastic during the crushing process to escape outward, and improving the environmental protection of the crushing processing device during operation. First, the two coarse crushing rollers 12 are used to crush the plastic inside the feed box 2, and then the multiple groups of fine crushing rollers 14 inside the fixed frame 13 are used to crush the coarsely crushed plastic. Through the setting of the two-stage crushing structure, while improving the crushing effect of the plastic, the crushing efficiency of the waste plastic is also improved.

[0023] Furthermore, in order to ensure the crushing efficiency of waste plastics inside the feed box 2 and to solve the problem of difficulty in feeding waste plastics when they are crushed inside the feed box 2, a material pressing assembly is arranged inside the feed box 2, and the material pressing assembly includes a movable material pressing plate 6 and a telescopic material pressing plate 7. The bottom of the movable cover plate 3 is movably provided with the movable material pressing plate 6, and both sides of the movable material pressing plate 6 are slidably provided with telescopic material pressing plates 7. The top of the movable cover plate 3 is fixedly provided with a servo electric cylinder 8, and the driving end of the servo electric cylinder 8 is fixedly connected to the top of the movable material pressing plate 6. When the waste plastics are being crushed, the driving end of the servo electric cylinder 8 is used to control the movable pressing plate 6 to move downward continuously, and the movable pressing plate 6 and two telescopic pressing plates 7 are used to push the waste plastics inside the feed box 2 downward until all the waste plastics inside the feed box 2 are coarsely crushed by the coarse crushing roller 12. The arrangement of the movable pressing plate 6 and the telescopic pressing plate 7 inside the feed box 2 can greatly improve the crushing efficiency of the waste plastics, and effectively solve the problem of difficulty in feeding the waste plastics when they are crushed inside the feed box 2.

[0024] Furthermore, in order to improve the environmental protection of the pulverizing device when performing waste plastic pulverizing processing, a dust suction component is also provided at the bottom of the movable cover plate 3, and the dust suction component includes two dust suction protective plates 5, and dust suction protective plates 5 are fixedly provided on both sides of the bottom of the movable cover plate 3, and a plurality of dust suction ports are provided on the opposite sides of the two dust suction protective plates 5, a dust collecting box 9 is fixedly provided on the back of the pulverizing box 1, and a dust suction pump 10 is fixedly provided on the top of the dust collecting box 9, and the air inlet end of the dust suction pump 10 is connected with the interior of the two dust suction protective plates 5 through a dust suction pipe; it should be noted that with the flipping control of the movable cover plate 3, the two dust suction protective plates 5 are respectively rotated to the two sides of the opening of the feed box 2, and when the waste plastic is introduced into the interior of the feed box 2, the dust at the opening of the feed box 2 is sucked away by the dust suction pump 10 in cooperation with the two dust suction protective plates 5, thereby ensuring that the dust of the waste plastic when entering the interior of the feed box 2 is dispersed everywhere, thereby greatly improving the environmental protection of the plastic pulverizing device.

[0025] Embodiment 2: Furthermore, in order to realize the rapid sorting of different types of plastic crushed materials after the waste plastics are crushed, a sorting mechanism is also arranged inside the crushing box 1, and the sorting mechanism includes an air sorting frame 16 and an electrostatic sorting frame 25. The electrostatic sorting frame 25 is fixedly arranged at the bottom of the crushing box 1, and the air sorting frame 16 is fixedly arranged on the top of the electrostatic sorting frame 25. The top of the air sorting frame 16 contacts the bottom of the feed box 2, and the air sorting frame 16 is arranged inside the air sorting frame 16. The upper and lower parts of the left sides of the inner walls of the air sorting channels 17 are respectively provided with first blanking channels 1 8 and the second blanking channel 19, and blowing racks 20 are respectively arranged at the upper and lower parts of the right side of the inner wall of the air selection channel 17, wherein the blowing directions of the two blowing racks 20 are respectively toward the inside of the first blanking channel 18 and the second blanking channel 19, an air pump is arranged at the bottom of the dust collecting box 9, and the air outlet end of the air pump is connected with the inside of the upper and lower two blowing racks 20 through air guide pipes, and the air inlet ends of the two blowing racks 20 at the upper and lower parts are respectively provided with air pressure valves, and the blowing pressure of the upper and lower blowing racks 20 is controlled by the air pressure valve, so as to achieve the air selection treatment of different types of plastic crushed materials.

[0026] Furthermore, a plurality of first blanking racks 21 and second blanking racks 22 are provided at the bottom of the air selection rack 16, and inclined grooves are provided inside the first blanking racks 21 and the second blanking racks 22. The interiors of the plurality of first blanking racks 21 are respectively connected to the bottoms of the plurality of first blanking channels 18, and the interiors of the plurality of second blanking racks 22 are respectively connected to the bottoms of the plurality of second blanking channels 19. A first material guide pipe 23 is also fixedly provided on one side of the bottom of the plurality of first blanking racks 21, and the interiors of the first material guide pipe 23 are respectively connected to the low-position sides of the inclined grooves inside the plurality of first blanking racks 21. A second material guide pipe 24 is also fixedly provided on one side of the bottom of the plurality of second blanking racks 22, and the interiors of the second material guide pipe 24 are respectively connected to the low-position sides of the inclined grooves inside the plurality of second blanking racks 22. One side of the first material guide pipe 23 and the second material guide pipe 24 both extend to the outside of the crushing box 1.

[0027] It should be noted that after the waste plastics are crushed inside the feed box 2, the plastic crushed materials fall into several air separation channels 17 inside the air separation frame 16 respectively, and the plastic crushed materials are blown to the first blanking channel 18 and the second blanking channel 19 respectively through the upper and lower blowing frames 20 inside the air separation channel 17. The blowing pressure of the upper blowing frame 20 is lower than that of the lower blowing frame 20. Therefore, the light crushed materials in the plastic crushed materials are air-separated and recovered through the first blanking channel 18, and the medium crushed materials in the plastic crushed materials are air-separated and recovered through the second blanking channel 19. Finally, the heavy crushed materials fall into the electrostatic sorting frame 25 through the bottom of the air separation channel 17, completing the automatic sorting of the plastic crushed materials, recycling different types of plastic crushed materials, and reducing the difficulty of sorting operations after crushing.

[0028] Furthermore, the positive electrode plate 26 and the negative electrode plate 27 are fixedly arranged on the front and rear sides of the electrostatic sorting frame 25, and the front and rear sides of the inner wall of the electrostatic sorting frame 25 are provided with drop-out ports 28, the interiors of the two drop-out ports 28 are provided with automatic control valves, and the bottoms of the two drop-out ports 28 are provided with third material guide racks 29, the interiors of the two third material guide racks 29 are provided with discharge troughs, and one side of the two third material guide racks 29 extends to the outside of the crushing box 1.

[0029] It should be noted that the plastic crushed materials falling from the bottom of the air separation channel 17 enter the interior of the electrostatic sorting rack 25. At this time, the positive plate 26 and the negative plate 27 are energized respectively, and an electrostatic field is formed inside the electrostatic sorting rack 25, giving the plastic crushed materials different charges, so that they are subjected to different electric field forces in the electric field, so that the plastic crushed materials with positive charge are attracted to one side of the negative plate 27, and the plastic crushed materials with negative charge are attracted to one side of the positive plate 26. Finally, the positive plate 26 and the negative plate 27 are de-energized, and the automatic control valves inside the two drop ports 28 are opened at the same time, so that the plastic crushed materials on one side of the positive plate 26 and the negative plate 27 are respectively sent out through the two third material guide racks 29, so as to realize further sorting and processing of the plastic crushed materials.

[0030] Embodiment 3: Specifically, this embodiment also discloses a pulverizing method of a plastic pulverizing device for recycling waste plastics, comprising the following steps: When the waste plastics are crushed, the front side of the movable cover plate 3 is turned upward by the electric rotating shaft 4 on one side of the top of the feed box 2, so that the top of the feed box 2 is in an open state. At this time, a certain amount of waste plastics is fed into the feed box 2. After the waste plastics are fed, the movable cover plate 3 is turned and reset by the electric rotating shaft 4, and the top of the feed box 2 is closed by the movable cover plate 3. When the waste plastics are crushed, the movable pressing plate 6 is controlled by the driving end of the servo electric cylinder 8 to continuously move downward, and the waste plastics in the feed box 2 are pushed downward by the movable pressing plate 6 and the two telescopic pressing plates 7 until all the waste plastics in the feed box 2 are crushed by the coarse crushing roller 12; When feeding the waste plastic, with the flipping control of the movable cover plate 3, the two dust protection plates 5 are respectively rotated to the two sides of the opening of the feed box 2. When the waste plastic is introduced into the feed box 2, the dust at the opening of the feed box 2 is sucked away by the dust pump 10 in cooperation with the two dust protection plates 5. After the waste plastics are crushed inside the feed box 2, the plastic crushed materials fall into several air separation channels 17 inside the air separation frame 16 respectively, and the plastic crushed materials are blown to the first blanking channel 18 and the second blanking channel 19 respectively through the upper and lower blowing frames 20 inside the air separation channel 17. The blowing pressure of the upper blowing frame 20 is lower than that of the lower blowing frame 20. Therefore, the light crushed materials in the plastic crushed materials are air-selected and recovered through the first blanking channel 18, and the medium crushed materials in the plastic crushed materials are air-selected and recovered through the second blanking channel 19. Finally, the heavy crushed materials fall into the electrostatic sorting frame 25 through the bottom of the air separation channel 17; The plastic pulverized material falling from the bottom of the air separation channel 17 enters the interior of the electrostatic sorting rack 25. At this time, the positive plate 26 and the negative plate 27 are energized respectively, and an electrostatic field is formed inside the electrostatic sorting rack 25, giving the plastic pulverized material different charges, so that it is subjected to different electric field forces in the electric field, so that the plastic pulverized material with positive charge is attracted to one side of the negative plate 27, and the plastic pulverized material with negative charge is attracted to one side of the positive plate 26. Finally, the positive plate 26 and the negative plate 27 are powered off, and the automatic control valves inside the two drop ports 28 are opened at the same time, so that the plastic pulverized material on one side of the positive plate 26 and the negative plate 27 are respectively sent out through the two third material guide racks 29, thereby realizing automatic sorting and processing of the plastic pulverized material.

[0031] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A plastic pulverizing and processing device for recycling waste plastics, comprising a pulverizing box (1) and a feed box (2), wherein the feed box (2) is fixedly arranged on the top of the pulverizing box (1), characterized in that: An electric rotating shaft (4) is rotatably provided at the rear side of the top of the feed box (2), and a movable cover plate (3) is rotatably provided on one side of the electric rotating shaft (4); guide plates (11) are fixedly provided on both sides of the interior of the feed box (2), and two coarse crushing rollers (12) are rotatably provided at the lower part of the interior of the feed box (2); a fixed frame (13) is also fixedly provided at the bottom of the feed box (2), and a plurality of fine crushing rollers (14) are rotatably provided inside the fixed frame (13); a crushing motor (15) is fixedly provided at the front of the feed box (2), and one end of the output shaft of the crushing motor (15) is fixedly connected to one end of one of the coarse crushing rollers (12); The crushing box (1) is also provided with a sorting mechanism inside, the sorting mechanism comprising an air sorting frame (16) and an electrostatic sorting frame (25), the electrostatic sorting frame (25) is fixedly provided at the bottom of the crushing box (1), and the air sorting frame (16) is fixedly provided at the top of the electrostatic sorting frame (25), the top of the air sorting frame (16) is in contact with the bottom of the feed box (2), and a plurality of air sorting channels (17) are provided inside the air sorting frame (16), a first blanking channel (18) and a second blanking channel (19) are respectively provided at the upper and lower parts of the left side of the inner wall of the plurality of air sorting channels (17), and an air blowing frame (20) is respectively provided at the upper and lower parts of the right side of the inner wall of the air sorting channel (17), wherein the air blowing directions of the two air blowing frames (20) are respectively directed toward the inside of the first blanking channel (18) and the second blanking channel (19); A positive electrode plate (26) and a negative electrode plate (27) are fixedly arranged on the front and rear sides of the electrostatic separation frame (25), respectively, and a material drop opening (28) is arranged on the front and rear sides of the inner wall of the electrostatic separation frame (25).

2. A plastic crushing and processing device for recycling waste plastics according to claim 1, characterized in that: One end of the two coarse grinding rollers (12) is driven by gears, and the fine grinding rollers (14) arranged inside the fixed frame (13) are grouped in pairs. A total of three groups of fine grinding rollers (14) are arranged inside the fixed frame (13), and one end of the two fine grinding rollers (14) in each group is driven by gears, and one end of one of the fine grinding rollers (14) is connected to one end of the output shaft of the grinding motor (15) through a pulley.

3. The plastic crushing and processing device for recycling waste plastics according to claim 1, characterized in that: A plurality of first blanking racks (21) and second blanking racks (22) are arranged at the bottom of the air selection rack (16), and the first blanking racks (21) and the second blanking racks (22) are both provided with inclined grooves inside. The interiors of the plurality of first blanking racks (21) are respectively connected to the bottoms of the plurality of first blanking channels (18), and the interiors of the plurality of second blanking racks (22) are respectively connected to the bottoms of the plurality of second blanking channels (19). One side of the bottom of the plurality of first blanking racks (21) is also provided with inclined grooves. A first material guide pipe (23) is fixedly arranged, and the interior of the first material guide pipe (23) is respectively communicated with the lower side of the internal inclined grooves of the plurality of first material drop racks (21); a second material guide pipe (24) is also fixedly arranged on one side of the bottom of the plurality of second material drop racks (22), and the interior of the second material guide pipe (24) is respectively communicated with the lower side of the internal inclined grooves of the plurality of second material drop racks (22); one side of each of the first material guide pipe (23) and the second material guide pipe (24) extends to the outside of the crushing box (1).

4. The plastic crushing and processing device for recycling waste plastics according to claim 1, characterized in that: The two material drop openings (28) are each provided with an automatic control valve, and the bottoms of the two material drop openings (28) are each provided with a third material guide rack (29), the two third material guide racks (29) are each provided with a material discharge trough, and one side of the two third material guide racks (29) extends to the outside of the crushing box (1).

5. The plastic crushing and processing device for recycling waste plastics according to claim 1, characterized in that: A material pressing assembly is arranged inside the feed box (2), and the material pressing assembly comprises a movable material pressing plate (6) and a telescopic material pressing plate (7); the movable material pressing plate (6) is movably arranged at the bottom of the movable cover plate (3), and telescopic material pressing plates (7) are slidably arranged on both sides of the movable material pressing plate (6); a servo electric cylinder (8) is fixedly arranged on the top of the movable cover plate (3), and the driving end of the servo electric cylinder (8) is fixedly connected to the top of the movable material pressing plate (6).

6. The plastic crushing and processing device for recycling waste plastics according to claim 1, characterized in that: A dust suction component is also provided at the bottom of the movable cover plate (3), and the dust suction component comprises two dust suction protective plates (5). Dust suction protective plates (5) are fixedly provided on both sides of the bottom of the movable cover plate (3), and a plurality of dust suction ports are provided on opposite sides of the two dust suction protective plates (5). A dust collecting box (9) is fixedly provided on the back of the crushing box (1), and a dust suction pump (10) is fixedly provided on the top of the dust collecting box (9), and an air inlet end of the dust suction pump (10) is connected to the inside of the two dust suction protective plates (5) through a dust suction pipe.

7. A plastic crushing and processing device for recycling waste plastics according to claim 6, characterized in that: An air pump is provided at the bottom of the dust collecting box (9), and the air outlet of the air pump is connected to the interior of the two upper and lower air blowing racks (20) respectively through air guide pipes, and the air inlet ends of the two upper and lower air blowing racks (20) are both provided with air pressure valves.

8. A plastic crushing and processing device for recycling waste plastics according to any one of claims 1 to 7, characterized in that: The pulverizing method of the plastic pulverizing device for recycling waste plastics is as follows: When the waste plastics are being crushed, the front side of the movable cover plate (3) is controlled to flip upwards by the electric rotating shaft (4) on one side of the top of the feed box (2), so that the top of the feed box (2) is in an open state. At this time, a certain amount of waste plastics is fed into the feed box (2). After the waste plastics are fed, the movable cover plate (3) is controlled to flip and reset by the electric rotating shaft (4), and the top of the feed box (2) is closed by the movable cover plate (3); When the waste plastics are being crushed, the driving end of the servo electric cylinder (8) controls the movable pressing plate (6) to move downward continuously, and the movable pressing plate (6) and two telescopic pressing plates (7) are used to push the waste plastics in the feed box (2) downward until all the waste plastics in the feed box (2) are crushed by the coarse crushing roller (12); When feeding the waste plastics, along with the flipping control of the movable cover plate (3), the two dust suction protection plates (5) are respectively rotated to the two sides of the opening of the feed box (2), and when the waste plastics are introduced into the interior of the feed box (2), the dust at the opening of the feed box (2) is sucked away by the dust suction pump (10) in cooperation with the two dust suction protection plates (5); After the waste plastics are crushed inside the feed box (2), the plastic crushed materials fall into a plurality of air separation channels (17) inside the air separation frame (16), and the plastic crushed materials are blown into the first drop channel (18) and the second drop channel (19) respectively by the upper and lower blowing frames (20) inside the air separation channel (17). The blowing pressure of the upper blowing frame (20) is lower than that of the lower blowing frame (20), so that the light crushed materials in the plastic crushed materials are air-separated and recovered through the first drop channel (18), and the medium crushed materials in the plastic crushed materials are air-separated and recovered through the second drop channel (19). Finally, the heavy crushed materials fall into the electrostatic separation frame (25) through the bottom of the air separation channel (17); The plastic pulverized material falling from the bottom of the air separation channel (17) enters the interior of the electrostatic separation rack (25). At this time, the positive plate (26) and the negative plate (27) are energized respectively, forming an electrostatic field inside the electrostatic separation rack (25), giving the plastic pulverized material different charges, so that it is subjected to different electric field forces in the electric field, so that the plastic pulverized material with positive charge is attracted to one side of the negative plate (27), and the plastic pulverized material with negative charge is attracted to one side of the positive plate (26). Finally, the positive plate (26) and the negative plate (27) are de-energized, and the automatic control valves inside the two material discharge ports (28) are opened at the same time, so that the plastic pulverized material on one side of the positive plate (26) and the negative plate (27) are respectively sent out through the two third material guide racks (29), thereby realizing automatic separation and processing of the plastic pulverized material.

Images