Plastic crushing device and treatment process based on waste plastic recycling and crushing

Abstract

The invention discloses a plastic crushing device and a treatment process based on waste plastic recycling and crushing, and relates to the technical field of plastic crushing, the plastic crushing device comprises a bottom plate, a device body is fixedly arranged at the top of the bottom plate, a position switching assembly is arranged above the bottom plate, and the position switching assembly comprises two screen units arranged up and down; the position switching assembly can drive the two screen units to move at the same time, one screen unit moves from the interior of the device body to the exterior of the device body, and the other screen unit moves from the exterior of the device body to the interior of the device body. The device solves the problems that an existing device lacks a mechanism for immediately cleaning a screen in a working state, along with increase of the accumulation amount, large-size plastic fragments are difficult to remove, even small-size plastic blocks with normal sizes are possibly hindered from passing through the screen, and the screening efficiency is greatly improved. The efficiency and the effect of the whole crushing and screening process are further influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic crushing, and in particular to a plastic crushing device and a processing technology based on the recycling and crushing of waste plastics. Background Art

[0002] A plastic crushing device, commonly known as a plastic crusher or plastic pulverizer, is a device specifically designed to break plastic products into smaller particles. Through mechanical action, it breaks discarded plastic products such as plastic bottles, plastic filaments, woven bags, plastic mesh ropes, films, shoe materials, sheets, plastic plates, and plastic pipes into small particles suitable for reuse. These particles can be used directly for injection molding or recycled after basic granulation, thus achieving effective recycling and reuse of plastic resources.

[0003] Existing plastic crushers, as auxiliary equipment used in conjunction with injection molding machines, have the main function of crushing large pieces of plastic materials and then transporting the generated smaller plastic fragments to the injection molding machine for recycling. In order to ensure that these crushed small plastic particles can directly meet the use requirements of the injection molding machine, the aperture size on the screen is usually set to the maximum plastic particle area that the injection molding machine can accept, so as to achieve seamless connection and efficient utilization of plastic resources.

[0004] Defects of the existing technology: When processing plastics, the existing plastic crushers often face the problem of different sizes of crushed products. Plastic fragments whose volume exceeds the aperture range of the screen cannot pass through the screening process smoothly, and large-sized plastic fragments will gradually accumulate on the screen. Since the existing equipment lacks a mechanism for immediate cleaning of the screen when it is working, the accumulation phenomenon on the screen becomes more and more serious. As the accumulation amount increases, not only is it difficult to remove large-sized fragments, it may even prevent small pieces of plastic of normal size from passing through the screen, thereby affecting the efficiency and effect of the entire crushing and screening process.

[0005] Therefore, the present application provides a plastic crushing device and a processing technology based on waste plastic recycling and crushing to meet the needs. Summary of the Invention

[0006] The purpose of this application is to provide a plastic crushing device and a processing process based on the recycling and crushing of waste plastics, which solves the problem that the existing equipment lacks a mechanism for immediate cleaning of the screen when in operation. As the accumulation amount increases, not only are large-sized plastic fragments difficult to remove, but they may even hinder small pieces of plastic of normal size from passing through the screen, thereby affecting the efficiency and effect of the entire crushing and screening process.

[0007] To solve the above problems, the present application provides the following technical solutions: a plastic crushing device, comprising: a bottom plate, a device body fixedly disposed on the top of the bottom plate, a position switching assembly disposed above the bottom plate, the position switching assembly comprising two screen units disposed one above the other, the position switching assembly being capable of driving the two screen units to move simultaneously, and allowing one of the screen units to move from the inside of the device body to the outside of the device body, and allowing the other screen unit to move from the outside of the device body to the inside of the device body, the position switching assembly comprising two threaded rods disposed one above the other;

[0008] A first transmission assembly and a bulk plastic receiving box are provided above the bottom plate, and the threaded rod below can drive the bulk plastic receiving box to rotate to the bottom of the screen unit through the first transmission assembly;

[0009] The screen unit includes a screen body, a closing assembly is provided at the bottom of the screen body, the closing assembly includes a sealing plate and an acting gear, two cleaning assemblies arranged up and down are provided on the side of the device body, the cleaning assembly includes a scraper and an active screw rod, the scraper can move vertically and horizontally, a second transmission assembly is provided below the scraper, the second transmission assembly includes a driving bevel gear, the active screw rod can drive the scraper to move vertically downward, thereby driving the driving bevel gear to rotate, the driving bevel gear can drive the acting gear to rotate, and when the acting gear rotates, it can drive the sealing plate to move horizontally and disengage from the screen body, and the scraper can scrape off large pieces of plastic on the screen unit when it moves horizontally.

[0010] Preferably, the position switching assembly also includes two fixed plates, which are symmetrically fixed on the sides of the device body, and the bottom of the fixed plate is fixedly connected to the top of the bottom plate, and the fixed plate is symmetrically fixedly connected to the side of the device body close to the device body. The end of the guide rail away from the corresponding fixed plate passes through one side of the device body and is fixedly connected to the inner wall of the device body. One of the screen units is slidably set between the two guide rails below, and the other screen unit is slidably set between the two guide rails above. In the two guide rails on the same fixed plate, a threaded rod is rotatably set inside one of the guide rails, and a guide rod is fixedly set inside the other guide rail. The inside of the screen unit and the position close to one side are threadedly connected to the corresponding threaded rod, and the inside of the screen unit and the position close to the other side are slidably connected to the corresponding guide rod, and the threaded rod and the guide rod The cam is fixedly connected to the upper and lower frames of the gear train, and the cam is fixedly connected to the frame of the gear train, and the cam is fixedly connected to the frame of the gear train.

[0011] Preferably, the first transmission assembly includes an inner gear ring rotatably connected to the top of the base plate, a mounting groove is provided at the top of the inner gear ring, the bottom of the large plastic receiving box is installed in the mounting groove of the inner gear ring, the top of the base plate is rotatably connected to the transmission shaft, the top of the base plate is fixedly connected to an L-shaped support rod, the transmission shaft passes through the L-shaped support rod, the bottom of the transmission shaft is fixedly connected to a transmission gear, the top of the transmission shaft is fixedly connected to a driven bevel gear, and the outer side of the threaded rod below is fixedly sleeved with an active bevel gear, the active bevel gear is meshed with the driven bevel gear, and the active bevel gear can drive the driven bevel gear to rotate.

[0012] Preferably, a plurality of filter holes are provided on the screen body, and a limit plate is symmetrically fixedly connected to the side of the screen body. The limit plate is adapted to the corresponding guide rail, and the limit plate is slidably arranged inside the corresponding guide rail. An extension plate is fixedly connected to one side of the screen body.

[0013] Preferably, the cleaning assembly is used to clean the large pieces of plastic on the screen unit, and the two cleaning assemblies are respectively located on both sides of the device body, and a carrying plate is provided below the scraper, and the carrying plate is fixedly connected to the outer wall of the device body, and the upper part of the carrying plate and the position near one side thereof are rotatably connected to the active screw rod, and the upper part of the carrying plate and the position near the other side thereof are fixedly connected to a vertical guide column, and the top of the guide column is fixedly connected to a connecting plate, and the top of the active screw rod is rotatably connected to another connecting plate, and the connecting plate is fixedly connected to the outer wall of the device body, and the active screw rod and the guide column are provided with the same lifting plate, and the lifting plate can drive the scraper to move vertically, and the active screw rod and the guide column both pass through the corresponding lifting plate, and the active screw rod is threadedly connected to the corresponding lifting plate, and two cylinders are symmetrically fixedly provided on the side of the lifting plate near the device body, and the output end of the cylinder passes through the lifting plate and is fixedly connected to the scraper, and the output end of the cylinder can drive the scraper to move horizontally to scrape off the large pieces of plastic on the screen unit, and a servo motor is fixedly provided at the bottom of the carrying plate, and the output end of the servo motor passes through the carrying plate and is fixedly connected to the corresponding active screw rod.

[0014] Preferably, the second transmission assembly includes two support plates fixedly connected to the top of the supporting plate, one of the support plates is rotatably connected to the side of the device body close to the first fixed shaft, and the other support plate is rotatably connected to the side of the device body close to the second fixed shaft, a transmission bevel gear and a first pulley are fixedly sleeved on the first fixed shaft, a driving gear and a second pulley are fixedly sleeved on the second fixed shaft, a belt is connected to the second pulley for transmission, a driving bevel gear is fixedly sleeved on the outer side of the active screw, and the driving bevel gear is meshed with the transmission bevel gear.

[0015] Preferably, the closing assembly also includes a transmission screw and a limiting column arranged at the bottom of the screen body. Two groups of support blocks are fixedly connected to the bottom of the screen body, one group of support blocks is rotatably connected to the transmission screw, and the other group of support blocks is fixedly connected to the limiting column, and the transmission screw and the limiting column pass through the corresponding support blocks. The end of the transmission screw away from the sealing plate is fixedly connected to the working gear, and the working gear is meshed with the corresponding driving gear. Two movable bars are symmetrically fixedly connected to the side of the sealing plate close to the working gear, one of which is threadedly connected to the transmission screw, and the other is slidably connected to the outside of the limiting column. The movable bar can drive the sealing plate to move horizontally outside the transmission screw.

[0016] Preferably, a notch is provided on the outside of the device body, and the notch is used for the passage of the position switching component and the closing component.

[0017] Preferably, a plurality of brackets are fixedly connected between the device body and the base plate, a feed port is provided at the top of the device body, a discharge port is provided at the bottom of the device body, a crushing tool is provided inside the device body, a driving device for driving the crushing tool is provided at the top of the base plate, and a small plastic receiving box is provided at the top of the base plate and below the discharge port of the device body.

[0018] The processing technology based on waste plastic recycling and crushing includes the following steps:

[0019] S1. Waste plastics are first placed into the feed port of the device body, and the crushing cutters installed inside the device body are driven by the driving device to crush the waste plastics;

[0020] S2. The small pieces of plastic that have been crushed are received by a small piece plastic receiving box.

[0021] In summary, the technical effects and advantages of the present invention are as follows:

[0022] 1. In the present invention, the device adopts two screen units, which realize alternating movement inside and outside the device body through a position switching component. When large pieces of plastic are accumulated inside one screen unit, it can be moved out of the device body through the position switching component, and another clean screen unit is moved in to continue the screening task, avoiding continuous blockage of the screen and ensuring the continuity and efficiency of the crushing and screening process.

[0023] 2. In the present invention, a cleaning assembly is provided, which includes components such as a scraper and a cylinder. After the screen unit is moved out of the device body, the large pieces of plastic on the screen can be automatically cleaned. The scraper is driven by the cylinder to move horizontally and scrape off the large pieces of plastic on the screen, ensuring the cleanliness and smoothness of the screen; the large piece plastic receiving box is used to receive the large pieces of plastic cleaned from the screen, and the rotation of the lower threaded rod is converted into the rotation of the large piece plastic receiving box through the cooperation of the first transmission assembly and the lower threaded rod. Therefore, when the screen unit to be cleaned moves, the large piece plastic receiving box can rotate at the same time, so that the large piece plastic receiving box can be accurately positioned under the screen unit to be cleaned, ensuring that the cleaned large pieces of plastic can be received and collected.

[0024] 3. In the present invention, the screen unit is equipped with a closing assembly, which includes a sealing plate and other components for closing the top of the screen unit when it moves to prevent large pieces of plastic from leaking from all sides. When the screen needs to be cleaned, the scraper moves downward to drive the corresponding sealing plate to disengage from the screen body through the cooperation of the cleaning assembly, the second transmission assembly, and the closing assembly, so that one side of the screen body is open to facilitate cleaning by the scraper. After cleaning, the closing assembly automatically resets again to ensure the sealing of the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 A schematic structural diagram of another perspective of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the main body of the missing device of the present invention;

[0029] Figure 4 It is a structural schematic diagram of the position switching assembly and the first transmission assembly of the present invention;

[0030] Figure 5 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0031] Figure 6 Schematic diagram of the structure of the screen unit of the present invention;

[0032] Figure 7 It is a structural schematic diagram of the closure assembly of the present invention;

[0033] Figure 8 It is a structural schematic diagram of the cleaning component of the present invention;

[0034] Figure 9 For the present invention Figure 2 A in the middle is an enlarged structural diagram;

[0035] Figure 10 It is a structural schematic diagram of the main body of the device of the present invention;

[0036] Figure 11 It is a structural diagram of another embodiment of the present invention.

[0037] In the figure: 1. bottom plate; 2. device body; 21. notch; 3. bracket; 4. position switching assembly; 41. screen unit; 411. screen body; 412. filter hole; 413. limit plate; 414. extension plate; 42. guide rail; 43. fixing plate; 44. guide rod; 45. threaded rod; 46. upper sprocket; 47. chain; 48. lower sprocket; 49. drive motor; 5. first transmission assembly; 51. driving bevel gear; 52. driven bevel gear; 53. transmission shaft; 54. transmission gear; 55. L-shaped support rod; 56. inner ring gear; 6. closing assembly; 61. sealing plate; 62. movable bar; 63. Limiting cylinder; 64. Transmission screw; 65. Action gear; 7. Cleaning assembly; 71. Scraper; 72. Lifting plate; 73. Cylinder; 74. Servo motor; 75. Guide cylinder; 76. Active screw; 8. Second transmission assembly; 81. Driving bevel gear; 82. Transmission bevel gear; 83. First pulley; 84. Driving gear; 85. Second pulley; 86. Belt; 87. Second fixed shaft; 88. First fixed shaft; 9. Carrying plate; 10. Receiving box for large plastic pieces; 11. Receiving box for small plastic pieces; 12. Protective shell; 13. Storage assembly; 14. Secondary screening assembly; 15. Storage box. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0039] Example: Reference Figures 1-11 The plastic crushing device shown includes: a base plate 1, a device body 2 is fixedly arranged on the top of the base plate 1, a plurality of brackets 3 are fixedly connected between the device body 2 and the base plate 1, the brackets 3 are used to support the device body 2, a feed port is provided at the top of the device body 2, a discharge port is provided at the bottom of the device body 2, a crushing tool is provided inside the device body 2, a driving device for driving the crushing tool is provided at the top of the base plate 1, and a small plastic receiving box 11 is provided at the top of the base plate 1 and below the discharge port of the device body 2.

[0040] A position switching assembly 4 is provided above the bottom plate 1. The position switching assembly 4 includes two screen units 41 arranged in an upper and lower manner. The position switching assembly 4 can drive the two screen units 41 to move simultaneously, and allows one of the screen units 41 to move from the inside of the device body 2 to the outside of the device body 2, and allows the other screen unit 41 to move from the outside of the device body 2 to the inside of the device body 2, and the movement directions of the two screen units 41 are the same. The position switching assembly 4 also includes two fixing plates 43. The two fixing plates 43 are symmetrically fixed on the sides of the device body 2, and the bottom of the fixing plate 43 is aligned with the bottom plate 1. The top of the device is fixedly connected, and two guide rails 42 are symmetrically fixedly connected to the side of the fixed plate 43 close to the device body 2. The end of the guide rail 42 away from the corresponding fixed plate 43 passes through one side of the device body 2 and is fixedly connected to the inner wall of the device body 2. One of the screen units 41 is slidably set between the two guide rails 42 below, and another screen unit 41 is slidably set between the two guide rails 42 above. In the two guide rails 42 on the same fixed plate 43, a threaded rod 45 is rotatably set inside one of the guide rails 42, and a guide rod 44 is fixed inside the other guide rail 42. The screen unit 41 The inner part and the position close to one side are threadedly connected with the corresponding threaded rod 45, the inner part and the position close to the other side of the screen unit 41 are slidably connected with the corresponding guide rod 44, and the threaded rod 45 and the guide rod 44 both pass through the corresponding screen unit 41, one end of the guide rod 44 is fixedly connected to the inner wall of the device body 2, and the other end of the guide rod 44 is fixedly connected to the corresponding fixed plate 43, one end of the upper threaded rod 45 passes through one side of the device body 2 and is rotatably connected to the inner wall of the device body 2, the other end of the upper threaded rod 45 is rotatably connected to the side wall of the corresponding fixed plate 43, and the lower threaded rod 45 One end of the threaded rod 45 is rotatably connected to the corresponding fixed plate 43, and the other end of the lower threaded rod 45 passes through the device body 2 and is rotatably connected to the other fixed plate 43. A driving motor 49 is fixedly provided on the side of one of the fixed plates 43 away from the device body 2. The output end of the driving motor 49 passes through the corresponding fixed plate 43 and is fixedly connected to the lower threaded rod 45. Both threaded rods 45 pass through the same fixed plate 43. The end of the upper threaded rod 45 is fixedly connected to the upper sprocket 46, and the end of the lower threaded rod 45 is fixedly connected to the lower sprocket 48. A chain 47 is connected between the upper sprocket 46 and the lower sprocket 48.

[0041] A first transmission assembly 5 and a bulk plastic receiving box 10 are provided above the base plate 1. The bulk plastic receiving box 10 is used to receive the bulk plastic cleaned from the screen unit 41. The threaded rod 45 below can drive the bulk plastic receiving box 10 to rotate to the bottom of the screen unit 41 through the first transmission assembly 5.

[0042] In the initial state, one of the screen units 41 is inside the device body 2, and the other screen unit 41 is outside the device body 2 (it has been cleaned and is waiting to be used). When a certain amount of large pieces of plastic are accumulated on the screen unit 41 inside the device body 2, it needs to be cleaned. The drive motor 49 is started, and the output end of the drive motor 49 drives the corresponding threaded rod 45 to rotate. The rotation of the threaded rod 45 drives the lower sprocket 48 to rotate. The lower sprocket 48 drives the upper sprocket 46 to rotate through the chain 47. The upper sprocket 46 drives the other threaded rod 45 to rotate. The two threaded rods 45 rotate, thereby causing one of the screen units 41 to move from the inside of the device body 2 to the outside of the device body 2, and the other screen unit 41 to move from the outside of the device body 2 to the inside of the device body 2. When the two screen units 41 reach the predetermined position, the drive motor 49 is stopped, and the bulk plastic receiving box 10 is rotated to the bottom of the screen unit 41 that needs to be cleaned, ensuring that the cleaned bulk plastic can be caught by the bulk plastic receiving box 10, and then the bulk plastic on the screen unit 41 is cleaned.

[0043] The first transmission assembly 5 includes an inner gear ring 56 rotatably connected to the top of the base plate 1. A mounting groove is provided at the top of the inner gear ring 56. The bottom of the large plastic receiving box 10 is installed in the mounting groove of the inner gear ring 56. The top of the base plate 1 is rotatably connected to the transmission shaft 53. The top of the base plate 1 is fixedly connected to an L-shaped support rod 55. The transmission shaft 53 passes through the L-shaped support rod 55. The L-shaped support rod 55 is used to support the transmission shaft 53. The bottom of the transmission shaft 53 is fixedly connected to a transmission gear 54. The top of the transmission shaft 53 is fixedly connected to a driven bevel gear 52. The outer side of the threaded rod 45 below is fixedly sleeved with a driving bevel gear 51. The driving bevel gear 51 is meshed with the driven bevel gear 52, and the driving bevel gear 51 can drive the driven bevel gear 52 to rotate.

[0044] When the lower threaded rod 45 rotates, the lower threaded rod 45 drives the active bevel gear 51 to rotate, the active bevel gear 51 drives the driven bevel gear 52 to rotate, the driven bevel gear 52 drives the transmission shaft 53 and the transmission gear 54 to rotate as a whole, and the transmission gear 54 drives the inner ring gear 56 and the bulk plastic receiving box 10 to rotate, so that when the screen unit 41 to be cleaned moves, the bulk plastic receiving box 10 can rotate at the same time. When the screen unit 41 to be cleaned moves completely to the cleaning position, the bulk plastic receiving box 10 rotates to the bottom of this screen unit 41, and the top opening of the bulk plastic receiving box 10 can catch the bulk plastic falling from the side of the screen unit 41.

[0045] The screen unit 41 includes a screen body 411, which is provided with a plurality of filtering holes 412. Large pieces of plastic cannot pass through the filtering holes 412 and are retained on the screen body 411. The side surfaces of the screen body 411 are symmetrically fixedly connected to the limiting plates 413. The limiting plates 413 are adapted to the corresponding guide rails 42, and the limiting plates 413 are slidably arranged inside the corresponding guide rails 42. An extension plate 414 is fixedly connected to one side of the screen body 411, and a closing component 6 is provided at the bottom of the screen body 411. The closing component 6 includes a sealing plate 61 arranged on the other side of the screen body 411. The limiting plate 413, the extension plate 414, and the sealing plate 61 can seal the top and sides of the screen body 411 to prevent large pieces of plastic on the screen unit 411 from leaking from the four sides during movement. When it is necessary to clean large pieces of plastic on the screen unit 41, the sealing plate 61 can be disengaged from the screen body 411.

[0046] The side of the device body 2 is provided with two cleaning assemblies 7 arranged up and down. The cleaning assembly 7 is used to clean the large pieces of plastic on the screen unit 41. The two cleaning assemblies 7 are respectively located on both sides of the device body 2. The cleaning assembly 7 includes a scraper 71. A carrying plate 9 is provided below the scraper 71. The carrying plate 9 is fixedly connected to the outer wall of the device body 2. An active screw rod 76 is rotatably connected to the upper and lower positions of the carrying plate 9 and close to one side thereof. A vertical guide column 75 is fixedly connected to the upper and lower positions of the carrying plate 9 and close to the other side thereof. The top of the guide column 75 is fixedly connected to a connecting plate. The top of the active screw rod 76 is rotatably connected to another connecting plate. The connecting plate is fixedly connected to the outer wall of the device body 2. The active screw rod 76 and the guide column 75 are provided with the same lifting plate 72. The lifting plate 72 can drive the scraper 71 to move vertically. The rod 76 and the guide column 75 all pass through the corresponding lifting plate 72, and the active screw rod 76 is threadedly connected to the corresponding lifting plate 72. Two cylinders 73 are symmetrically fixed on the side of the lifting plate 72 near the device body 2. The output end of the cylinder 73 passes through the lifting plate 72 and is fixedly connected to the scraper 71. The output end of the cylinder 73 can drive the scraper 71 to move horizontally to scrape off large pieces of plastic on the screen unit 41. A servo motor 74 is fixedly provided at the bottom of the supporting plate 9. The output end of the servo motor 74 passes through the supporting plate 9 and is fixedly connected to the corresponding active screw rod 76. A second transmission assembly 8 is provided below the scraper 71. When the scraper 71 moves downward, it can drive the corresponding sealing plate 61 to disengage from the screen body 411 through the cooperation of the cleaning assembly 7, the second transmission assembly 8, and the closing assembly 6, so that one side of the screen body 411 is open.

[0047] When the screen unit 41 to be cleaned moves to the outside of the device body 2 and the screen unit 41 is stable, the servo motor 74 corresponding to the screen unit 41 is started, and the output end of the servo motor 74 drives the corresponding active screw 76 to rotate, so that the lifting plate 72 moves vertically downward, and the lifting plate 72 drives the cylinder 73 and the scraper 71 to move vertically downward as a whole until the bottom of the scraper 71 contacts the extension plate 414. The scraper 71 is elastic. During the downward movement of the scraper 71, the corresponding sealing plate 61 is driven to disengage from the screen body 411 through the second transmission assembly 8, so that the screen One side of the main body 411 is opened, and then the servo motor 74 is stopped and the cylinder 73 is started. The output end of the cylinder 73 drives the scraper 71 to move away from the device body 2, and pushes the scraper 71 from the extension plate 414 to the screen body 411 and always contacts the top of the screen body 411. As the output end of the cylinder 73 continues to operate, the scraper 71 pushes the large pieces of plastic on the screen body 411 through the open part of the screen body 411, that is, the position where the sealing plate 61 is not sealed, from the top of the screen body 411, and the large pieces of plastic fall into the large piece plastic receiving box 10 below it under the action of gravity.

[0048] The second transmission assembly 8 includes two support plates fixedly connected to the top of the supporting plate 9, one of the support plates is rotatably connected to the side of the device body 2 with a first fixed shaft 88, and the other support plate is rotatably connected to the side of the device body 2 with a second fixed shaft 87. The first fixed shaft 88 is fixedly sleeved with a transmission bevel gear 82 and a first pulley 83, and the second fixed shaft 87 is fixedly sleeved with a driving gear 84 and a second pulley 85. A belt 86 is connected to the second pulley 85 and the first pulley 83 for transmission. The outer side of the active screw rod 76 is fixedly sleeved with a driving bevel gear 81, and the driving bevel gear 81 is meshed with the transmission bevel gear 82.

[0049] The closing assembly 6 also includes a transmission screw 64 and a limiting column 63 arranged at the bottom of the screen body 411. The bottom of the screen body 411 is fixedly connected to two groups of support blocks, which are respectively used to support the transmission screw 64 and the limiting column 63. One group of support blocks is rotatably connected to the transmission screw 64, and the other group of support blocks is fixedly connected to the limiting column 63, and the transmission screw 64 and the limiting column 63 pass through the corresponding support blocks. The end of the transmission screw 64 away from the sealing plate 61 is fixedly connected to the working gear 65, and the working gear 65 is meshed with the corresponding driving gear 84. The driving gear 84 can drive the working gear 65 to rotate. The side of the sealing plate 61 near the working gear 65 is symmetrically fixed with two movable bars 62, one of which is threadedly connected to the transmission screw 64, and the other movable bar 62 is slidably connected to the outside of the limiting column 63. The movable bar 62 can drive the sealing plate 61 to move horizontally outside the transmission screw 64.

[0050] When the screen unit 41 that needs to be cleaned moves from the inside of the device body 2 to the outside of the device body 2, the action gear 65 moves with the corresponding screen unit 41 until the screen unit 41 is stable, and the action gear 65 engages with the driving gear 84. When the servo motor 74 is started, the output end of the servo motor 74 drives the active screw 76 and the driving bevel gear 81 to rotate, and the driving bevel gear 81 drives the transmission bevel gear 82 to rotate, and the transmission bevel gear 82 drives the first pulley 83 and the first fixed shaft 88 to rotate as a whole. The first pulley 83 drives the second pulley 85 to rotate through the belt 86, and the second pulley 85 drives the second fixed shaft 87 and the driving gear 84 to rotate as a whole. The driving gear 84 drives the action gear 65 to rotate, and the action gear 65 drives the transmission screw 64 to rotate, so that the movable bar 62 moves in the direction away from the device body 2, and the movable bar 62 drives the sealing plate 61 to move in the direction away from the device body 2, so that the sealing plate 61 is out of contact with the screen body 411, and then one side of the screen body 411 is opened.

[0051] After one of the screen units 41 is cleaned, the corresponding cylinder 73 is started, and the output end of the cylinder 73 drives the scraper 71 to move toward the device body 2 until the scraper 71 is reset. The servo motor 74 is started, and the output end of the servo motor 74 drives the active screw 76 and drives the bevel gear 81 to rotate, so that the lifting plate 72 and the scraper 71 are vertically lifted as a whole to reset. At the same time, the driving bevel gear 81 finally drives the working gear 65 to rotate, so that the movable bar 62 and the sealing plate 61 are moved toward the device body 2 as a whole, so that the sealing plate 61 and the movable bar 62 are reset as a whole. , the four sides of the screen body 411 are sealed again; when the screen unit 41 inside the device body 2 has been working for a period of time and needs to be cleaned, the two screen units 41 are moved simultaneously by the position switching component 4, so that the above-mentioned screen unit 41 can be cleaned, and the other cleaned screen unit 41 enters the interior of the device body 2 to perform the task of filtering large plastics; after the interior of the large plastic receiving box 10 accommodates a certain volume of large plastics, the large plastic receiving box 10 is taken out when it is not working, and the large plastics inside it are poured back into the interior of the device body 2.

[0052] It should be noted that when the lower screen unit 41 and the upper screen unit 41 move simultaneously, part of the structure of the lower extension plate 414 and part of the structure of the upper extension plate 414 will always remain in an overlapping state, ensuring that the plastic crushed by the crushing tool can be caught by any screen unit 41 when it falls, preventing the plastic from not being filtered due to the change in the position of the screen unit 41 when it falls.

[0053] A notch 21 is provided on the outer side of the device body 2 , and the notch 21 is used for the position switching component 4 and the closing component 6 to pass through.

[0054] Preferably, a protective shell 12 and a secondary screening component 14 are fixedly provided on the bottom surface, and the entire structure of the plastic crushing device is inside the protective shell 12. An inlet is provided at the top of the protective shell 12, and a discharge port is provided at the bottom of the protective shell 12. An discharge port is provided at the bottom of the small plastic receiving box 11, and a storage component 13 is fixedly provided at the bottom of the protective shell 12. The inlet of the storage component 13 is connected with the discharge port of the small plastic receiving box 11, and the discharge port of the storage component 13 corresponds to the inlet position of the storage component. The storage component 13 can receive the small plastic pieces of the small plastic receiving box 11 and store them. A valve is provided at the discharge port of the storage component 13, and the secondary screening component 14 includes a screening motor and a screening drum. A plurality of screening holes are provided on the screening drum. The screening motor can drive the screening drum to rotate through roller transmission, thereby realizing secondary screening of small plastic pieces. A storage box 15 is fixedly provided on the bottom surface.

[0055] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A plastic crushing device, comprising: A bottom plate, a device body is fixedly provided on the top of the bottom plate, characterized in that: a position switching assembly is provided above the bottom plate, the position switching assembly includes two screen units arranged in an upper and lower manner, the position switching assembly can drive the two screen units to move simultaneously, and allows one of the screen units to move from the inside of the device body to the outside of the device body, and allows the other screen unit to move from the outside of the device body to the inside of the device body, and the position switching assembly includes two threaded rods arranged in an upper and lower manner; A first transmission assembly and a bulk plastic receiving box are provided above the bottom plate, and the threaded rod below can drive the bulk plastic receiving box to rotate to the bottom of the screen unit through the first transmission assembly; The screen unit includes a screen body, a closing assembly is provided at the bottom of the screen body, the closing assembly includes a sealing plate and an acting gear, two cleaning assemblies arranged up and down are provided on the side of the device body, the cleaning assembly includes a scraper and an active screw rod, the scraper can move vertically and horizontally, a second transmission assembly is provided below the scraper, the second transmission assembly includes a driving bevel gear, the active screw rod can drive the scraper to move vertically downward, thereby driving the driving bevel gear to rotate, the driving bevel gear can drive the acting gear to rotate, and when the acting gear rotates, it can drive the sealing plate to move horizontally and disengage from the screen body, and the scraper can scrape off large pieces of plastic on the screen unit when it moves horizontally.

2. A plastic crushing device according to claim 1, characterized in that: The position switching assembly also includes two fixed plates, which are symmetrically fixed on the sides of the device body, and the bottom of the fixed plate is fixedly connected to the top of the bottom plate. The fixed plate is symmetrically fixedly connected to the side of the device body close to the device body. The end of the guide rail away from the corresponding fixed plate passes through one side of the device body and is fixedly connected to the inner wall of the device body. One of the screen units is slidably set between the two guide rails below, and the other screen unit is slidably set between the two guide rails above. In the two guide rails on the same fixed plate, a threaded rod is rotatably set inside one of the guide rails, and a guide rod is fixedly set inside the other guide rail. The interior of the screen unit and the position near one side are threadedly connected to the corresponding threaded rod, and the interior of the screen unit and the position near the other side are slidably connected to the corresponding guide rod, and the threaded rod and the guide rod are both penetrated. The cam is fixedly connected to the upper end of the driving mechanism, and the cam is fixedly connected to the lower end of the driving mechanism.

3. The plastic crushing device according to claim 1, characterized in that: The first transmission assembly includes an inner gear ring rotatably connected to the top of the base plate, a mounting groove is provided on the top of the inner gear ring, and the bottom of the large plastic receiving box is installed in the mounting groove of the inner gear ring; the top of the base plate is rotatably connected to the transmission shaft, the top of the base plate is fixedly connected to an L-shaped support rod, the transmission shaft passes through the L-shaped support rod, the bottom of the transmission shaft is fixedly connected to a transmission gear, the top of the transmission shaft is fixedly connected to a driven bevel gear, and the outer side of the threaded rod below is fixedly sleeved with a driving bevel gear, the driving bevel gear is meshed with the driven bevel gear, and the driving bevel gear can drive the driven bevel gear to rotate.

4. A plastic crushing device according to claim 2, characterized in that: There are multiple filter holes on the screen body, and the side of the screen body is symmetrically fixedly connected with a limit plate. The limit plate is adapted to the corresponding guide rail, and the limit plate is slidably set inside the corresponding guide rail. An extension plate is fixedly connected to one side of the screen body.

5. The plastic crushing device according to claim 1, characterized in that: The cleaning assembly is used to clean large pieces of plastic on the screen unit. The two cleaning assemblies are respectively located on both sides of the device body. A carrying plate is provided under the scraper, and the carrying plate is fixedly connected to the outer wall of the device body. The upper part of the carrying plate and the position close to one side thereof are rotatably connected to the active screw rod. The upper part of the carrying plate and the position close to the other side thereof are fixedly connected to a vertical guide column. The top of the guide column is fixedly connected to a connecting plate, and the top of the active screw rod is rotatably connected to another connecting plate. The connecting plate is fixedly connected to the outer wall of the device body. The active screw rod and the guide column are provided with the same lifting plate, and the lifting plate can drive the scraper to move vertically. The active screw rod and the guide column both pass through the corresponding lifting plate, and the active screw rod is threadedly connected to the corresponding lifting plate. Two cylinders are symmetrically fixed on the side of the lifting plate near the device body. The output end of the cylinder passes through the lifting plate and is fixedly connected to the scraper. The output end of the cylinder can drive the scraper to move horizontally to scrape off large pieces of plastic on the screen unit. A servo motor is fixedly provided at the bottom of the carrying plate, and the output end of the servo motor passes through the carrying plate and is fixedly connected to the corresponding active screw rod.

6. A plastic crushing device according to claim 5, characterized in that: The second transmission assembly includes two support plates fixedly connected to the top of the carrying plate, one of the support plates is rotatably connected to the first fixed shaft close to the side of the device body, and the other support plate is rotatably connected to the second fixed shaft close to the side of the device body. The first fixed shaft is fixedly sleeved with a transmission bevel gear and a first pulley, and the second fixed shaft is fixedly sleeved with a driving gear and a second pulley. A belt is connected to the second pulley for transmission, and the outer side of the active screw is fixedly sleeved with a driving bevel gear, and the driving bevel gear is meshed with the transmission bevel gear.

7. A plastic crushing device according to claim 6, characterized in that: The closing assembly also includes a transmission screw and a limiting column arranged at the bottom of the screen body. Two groups of support blocks are fixedly connected to the bottom of the screen body, one group of support blocks is rotatably connected to the transmission screw, and the other group of support blocks is fixedly connected to the limiting column, and the transmission screw and the limiting column pass through the corresponding support blocks. The end of the transmission screw away from the sealing plate is fixedly connected to the working gear, and the working gear is meshed with the corresponding driving gear. Two movable bars are symmetrically fixedly connected to the side of the sealing plate close to the working gear, one of which is threadedly connected to the transmission screw, and the other is slidably connected to the outside of the limiting column. The movable bar can drive the sealing plate to move horizontally outside the transmission screw.

8. The plastic crushing device according to claim 1, characterized in that: A notch is provided on the outside of the device body, and the notch is used for the passage of the position switching component and the closing component.

9. A plastic crushing device according to any one of claims 1 to 8, characterized in that: Multiple brackets are fixedly connected between the device body and the base plate. A feed port is provided at the top of the device body, and a discharge port is provided at the bottom of the device body. A crushing tool is provided inside the device body, and a driving device for driving the crushing tool is provided at the top of the base plate. A small plastic receiving box is provided at the top of the base plate and below the discharge port of the device body.

10. Based on the waste plastic recycling and crushing process, the plastic crushing device described in claim 9 is used, characterized in that: The following steps are involved: S1. Waste plastics are first placed into the feed port of the device body, and the crushing cutters installed inside the device body are driven by the driving device to crush the waste plastics; S2. The small pieces of plastic that have been crushed are received by a small piece plastic receiving box.

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