Regenerated plastic particle granulation device

Abstract

The invention relates to the technical field of plastic granulation, in particular to a regenerated plastic particle granulation device which comprises a granulator body. The feeding hopper is fixedly mounted at a feeding hole of the granulator main body; the treatment box is communicated with the feeding hopper; the crushing mechanism is used for crushing the plastic; the screening mechanism is used for screening the plastic particles; the material returning mechanism is used for re-conveying the screened unqualified plastic particles to the crushing mechanism for re-crushing; and the power mechanism is used for driving the crushing mechanism and the screening mechanism to operate. According to the plastic crushing and screening device, through mutual cooperation of the crushing mechanism, the screening mechanism, the material returning mechanism and the power mechanism, plastic can be crushed and screened multiple times, and screened unqualified plastic particles are sent back to be crushed and screened again, so that the plastic crushing and screening efficiency is improved, and the plastic particles are uniform in particle size; and the problem that the granulation quality of the plastic particles is affected due to non-uniform melting degrees of the plastic particles with different particle sizes is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic granulation, and specifically relates to a granulating device for recycled plastic particles. Background Art

[0002] A granulator is a forming machine that can manufacture materials into specific shapes. It has wide applicability and is deeply loved by users. With the development of technology, the types of granulators have gradually increased, including granulators for plastic recycled particles, and granulators are required for processing plastic recycled particles during the manufacturing process.

[0003] A Chinese patent with the application number CN202311306343.6 discloses a plastic recycled particle granulator, including a granulator and a hopper, and the hopper is fixedly communicated with the top of the granulator. In this invention, through an intermittent feeding mechanism, waste plastic particles fall into the hopper intermittently. At the same time, a crushing mechanism crushes the waste plastic particles, thereby avoiding blockage of the hopper caused by oversize waste plastic particles. At the same time, after the waste plastic particles are crushed and fall, the shunting mechanism will fall on the conical shunting block, and then spread to both sides of the shunting plate, and fall into the hopper through the leakage holes and shunting grooves, achieving a dispersing effect. And the vibration mechanism improves the shunting effect and also shakes off the waste plastic particles on the shunting plate, solving the problem that as the granulator processes, waste plastic particles flow into the granulator little by little, and during this process, it is extremely easy to occur blockage in the hopper, and the waste plastic particles are blocked in the hopper, resulting in the granulator being unable to obtain material replenishment, thereby affecting the normal use of the granulator.

[0004] However, only one crushing process is used for crushing in the above patent, and the particle size of the generated plastic particles is not uniform enough. During the subsequent melting granulation process, the non-uniform melting degree of plastic particles with different particle sizes will affect the quality of recycled plastics.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above defects. Summary of the Invention

[0006] The purpose of the present invention is to provide a granulating device for recycled plastic particles that can effectively solve the above technical problems.

[0007] To achieve the purpose of the present invention, the following technical solutions are adopted:

[0008] A granulating device for recycled plastic particles, comprising: a granulator main body; a feed hopper fixedly installed at the feed inlet of the granulator main body; a treatment box communicated with the feed hopper; a crushing mechanism for crushing plastics; a screening mechanism for screening plastic particles; a return material mechanism for re-transporting the unqualified plastic particles after screening to the crushing mechanism for re-crushing; a power mechanism for driving the crushing mechanism and the screening mechanism to operate;

[0009] The screening mechanism includes: a first sieve plate; a second sieve plate; a first discharge hopper and a second discharge hopper inserted and installed on the processing box; a vibration assembly for driving the first sieve plate and the second sieve plate to vibrate.

[0010] The vibration assembly includes: a rotating plate rotatably installed in the processing box; a round rod rotatably installed on the rotating plate; a movable frame slidably installed on the round rod; a connecting rod hinged between the movable frame and the first sieve plate; a connecting plate fixedly installed on the second sieve plate; a fixing plate fixedly installed in the processing box; and a connecting spring fixedly installed between the fixing plate and the connecting plate.

[0011] Further, the rotating plate is petal-shaped, and the connecting plate is located at the bottom of the rotating plate.

[0012] Further, the discharge end of the first sieve plate is hinged and installed in the first discharge hopper, and the discharge end of the second sieve plate is hinged and installed in the second discharge hopper.

[0013] The crushing mechanism includes: a mounting plate fixedly installed in the processing box; a circular opening opened on the mounting plate; an aggregate hopper slidably installed in the circular opening; a mounting frame fixedly installed at the bottom of the mounting plate; a crushing roller rotatably installed in the mounting frame; and a connecting gear coaxially connected to the crushing roller.

[0014] Further, the crushing mechanism further includes: an anti-blocking component for preventing the plastic in the aggregate hopper from being blocked.

[0015] The anti-blocking component includes: a grinding cylinder rotatably installed in the processing box; a crushing knife fixedly installed on the grinding cylinder; a driven bevel gear coaxially connected to the grinding cylinder; a driving bevel gear meshed with the driven bevel gear; and the driving bevel gear is rotatably installed in the processing box.

[0016] Further, the crushing mechanism further includes: a feeding component for intermittently feeding the plastic in the aggregate hopper.

[0017] The feeding component includes: a liquid collecting pipe fixedly installed on the mounting plate; a cavity opened on the mounting plate; a liquid outlet pipe connecting the cavity and the liquid collecting pipe; a second piston plate slidably installed in the liquid collecting pipe; a push rod fixedly installed on the second piston plate; a return spring for driving the second piston plate to reset; and a liquid supply unit for delivering hydraulic oil into the liquid collecting pipe.

[0018] Further, the liquid supply unit includes: a fixed cylinder fixedly installed at the bottom of the mounting plate; a first piston plate slidably installed in the fixed cylinder; a movable rod fixedly connected to the first piston plate; a bladder fixedly installed between the first piston plate and the fixed cylinder; and a liquid inlet pipe communicating the bladder with the cavity.

[0019] Further, the material return mechanism includes: a material return pipe communicating with the first discharge hopper and the second discharge hopper; a blower communicating with the material return pipe; and the discharge end of the material return pipe communicating with the treatment tank.

[0020] Further, the power mechanism includes: a transmission member; and a motor driving the transmission member to rotate.

[0021] Further, it further includes: a gas collecting pipe rotatably installed in the treatment tank; a spray head communicating with the gas collecting pipe; a transmission gear fixedly sleeved on the gas collecting pipe; a rack meshing with the transmission gear; an air outlet pipe communicating the gas collecting pipe with the fixed cylinder; and an air inlet pipe communicating with the fixed cylinder.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] A regenerated plastic particle granulating device of the present invention, through the mutual cooperation of a crushing mechanism, a screening mechanism, a material return mechanism, and a power mechanism, can crush and screen plastics multiple times, and send back the unqualified plastic particles screened out for re-crushing and screening, thereby improving the crushing and screening efficiency of plastics, making the particle size of plastic particles uniform, and avoiding the problem that the melting degrees of plastic particles with different particle sizes are inconsistent, affecting the granulation quality of plastic particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The 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 to the present invention.

[0025] Figure 1 It is a three-dimensional schematic diagram of a regenerated plastic particle granulating device of the present invention;

[0026] Figure 2 It is a three-dimensional schematic diagram of another angle of a regenerated plastic particle granulating device of the present invention;

[0027] Figure 3 It is a cross-sectional view of the treatment tank of a regenerated plastic particle granulating device of the present invention;

[0028] Figure 4 It is a cross-sectional view of the aggregate hopper of a regenerated plastic particle granulating device of the present invention;

[0029] Figure 5 It is of a regenerated plastic particle granulating device of the present inventionFigure 4 Enlarged view of part A;

[0030] Figure 6 Stereoscopic schematic diagram of the first sieve plate of a granulating device for recycled plastic particles according to the present invention;

[0031] Figure 7 For a granulating device for recycled plastic particles according to the present invention Figure 6 Enlarged view of part B.

[0032] In the figure:

[0033] 1. Main body of granulator; 2. Feeding hopper; 3. Processing box; 4. Crushing mechanism; 41. Mounting plate; 42. Aggregating hopper; 43. Mounting frame; 44. Crushing roller; 45. Linkage gear; 46. Anti-blocking component; 461. Grinding cylinder; 462. Crushing knife; 463. Driven bevel gear; 464. Driving bevel gear; 47. Feeding component; 471. Cavity; 472. Liquid collecting pipe; 473. Liquid outlet pipe; 474. Second piston plate; 475. Push rod; 476. Return spring; 477. Liquid supply unit; 4771. Fixed cylinder; 4772. First piston plate; 4773. Movable rod; 4774. Bladder; 4775. Liquid inlet pipe; 5. Screening mechanism; 51. First sieve plate; 52. Second sieve plate; 53. First discharge hopper; 54. Second discharge hopper; 55. Vibration component; 551. Rotating plate; 552. Round rod; 553. Movable frame; 554. Linkage rod; 555. Fixed plate; 556. Linkage spring; 557. Connecting plate; 6. Returning material mechanism; 61. Returning material pipe; 62. Fan; 7. Power mechanism; 71. Transmission part; 72. Motor; 8. Gas collecting pipe; 9. Sprayer; 10. Air inlet pipe; 11. Air outlet pipe; 12. Rack; 13. Transmission gear. Specific embodiments

[0034] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are some but not all of the embodiments of the present invention.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "lateral", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is 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. Therefore, it should not be construed as a limitation on the protection scope of the present invention. When a component is referred to as "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0036] As Figures 1 to 7 shown, a regenerated plastic particle granulating device of the present invention includes: a granulator main body 1; a feed hopper 2 fixedly installed at the feed inlet of the granulator main body 1; a processing box 3 communicated with the feed hopper 2, and a feed opening is provided at the top of the processing box 3; a crushing mechanism 4 for crushing plastics; a screening mechanism 5 for screening plastic particles; a return material mechanism 6 for re-transporting the unqualified plastic particles after screening to the crushing mechanism 4 for re-crushing; and a power mechanism 7 for driving the crushing mechanism 4 and the screening mechanism 5 to operate.

[0037] A filter screen plate (not shown) is installed at the top of the feed opening. When discharging materials, the filter screen plate is opened, and at this time, it is convenient to put plastics into the hopper 42. After the discharging is completed, the filter screen plate is reset so that the filter screen plate covers the feed opening to prevent plastic particles from popping out of the feed opening during crushing.

[0038] The screening mechanism 5 includes: a first screen plate 51; a second screen plate 52; a first discharge hopper 53 and a second discharge hopper 54 inserted and installed on the processing box 3; and a vibration assembly 55 for driving the first screen plate 51 and the second screen plate 52 to vibrate.

[0039] The first screen plate 51 is located above the second screen plate 52, and the screen holes of the first screen plate 51 are larger than those of the second screen plate 52.

[0040] The plastic particles crushed by the crushing mechanism 4 fall onto the first screen plate 51. The large particles in the plastic particles can be screened out through the first screen plate 51, and the large particles are discharged through the first discharge hopper 53; the medium particles are screened out through the second screen plate 52, and the medium particles are discharged through the second discharge hopper 54.

[0041] The vibration assembly 55 includes: a rotating plate 551 rotatably installed in the processing box 3; a round rod 552 rotatably installed on the rotating plate 551; a movable frame 553 slidably installed on the round rod 552; a linkage rod 554 hingedly installed between the movable frame 553 and the first sieve plate 51; a connecting plate 557 fixedly installed on the second sieve plate 52; a fixing plate 555 fixedly installed in the processing box 3; a linkage spring 556 fixedly installed between the fixing plate 555 and the connecting plate 557; the discharge end of the first sieve plate 51 is hingedly installed in the first discharge hopper 53, and the discharge end of the second sieve plate 52 is hingedly installed in the second discharge hopper 54.

[0042] A limiting component (not shown) is provided on one side of the movable frame 553 to limit the movement of the movable frame 553. The limiting component is preferably a slide rail and a slider. The slide rail is fixedly installed on the inner wall of the processing box 3 and is vertically arranged. The slider is fixedly connected to the movable frame 553, so that the movable frame 553 makes a reciprocating up-and-down movement driven by the round rod 552.

[0043] During screening, start the power mechanism 7 to drive the vibration assembly to operate, that is, drive the rotating plate 551 to rotate through the power mechanism 7. The rotating plate 551 drives the round rod 552 to rotate, so that the movable frame 553 makes a reciprocating up-and-down movement, and drives the linkage rod 554 to move. The linkage rod 554 drives the first sieve plate 51 to swing reciprocally, so that the first sieve plate 51 vibrates, improving the screening effect of the first sieve plate 51.

[0044] Since the rotating plate 551 is petal-shaped and the connecting plate 557 is located at the bottom of the rotating plate 551, when the rotating plate 551 rotates, its petal-shaped side wall can intermittently squeeze the connecting plate 557, and cooperate with the elastic force of the linked spring, so that the second sieve plate 52 vibrates, improving the screening effect of the second sieve plate 52.

[0045] Driven by the linkage rod 554, the amplitude of the first sieve plate 51 is relatively large. Since large plastic particles have large inertia and poor fluidity, a design with a large amplitude is adopted to toss and screen the large plastic particles to provide sufficient tossing force to promote material transportation.

[0046] Due to the rotation of the rotating plate 551, the amplitude of the second sieve plate 52 is small and the vibration frequency is high, which can not only meet the screening requirements of medium-sized plastic particles, but also suppress the phenomena of particle splashing and material layer flow disorder, ensuring the screening accuracy.

[0047] The qualified plastic particles after being screened by the second sieve plate 52 enter the granulator main body 1 through the feed hopper 2 for granulation.

[0048] In the present invention, through the setting of the screening mechanism 5, multi-stage screening of plastic particles is realized, the screening accuracy of plastic particles is improved, and unqualified plastic particles are prevented from entering the granulator main body 1, which may cause uneven heating and affect the granulation quality of plastic particles.

[0049] The crushing mechanism 4 includes: a mounting plate 41 fixedly installed in the processing box 3; a circular opening formed in the mounting plate 41; a collecting hopper 42 slidably installed in the circular opening; a mounting frame 43 fixedly installed at the bottom of the mounting plate 41, and the discharging end of the collecting hopper 42 communicates with the mounting frame 43; a crushing roller 44 rotatably installed in the mounting frame 43; a linkage gear 45 coaxially connected to the crushing roller 44; there are two crushing rollers 44, and the two crushing rollers 44 are respectively provided with linkage gears 45, and the two linkage gears 45 are meshed with each other.

[0050] Put a certain amount of plastic into the collecting hopper 42 through the feeding opening. At this time, start the power mechanism 7 to drive the crushing roller 44 to rotate. Since the two linkage gears 45 are meshed with each other, the two crushing rollers 44 rotate relatively. When the plastic enters between the two crushing rollers 44 through the discharging end of the collecting hopper 42, the crushing of the plastic is realized.

[0051] The crushed plastic particles fall onto the top of the first sieve plate 51 for screening.

[0052] The crushing mechanism 4 further includes: an anti-blocking component 46 for preventing the plastic in the collecting hopper 42 from being blocked; the anti-blocking component 46 includes: a grinding cylinder 461 rotatably installed in the processing box 3; a crushing knife 462 fixedly installed on the grinding cylinder 461; a driven bevel gear 463 coaxially connected to the grinding cylinder 461; a driving bevel gear 464 meshed with the driven bevel gear 463; the driving bevel gear 464 is rotatably installed in the processing box 3.

[0053] When starting the power mechanism 7, the driving bevel gear 464 can be driven to rotate synchronously. The driving bevel gear 464 drives the driven bevel gear 463 to rotate, thereby driving the grinding cylinder 461 to rotate. The grinding cylinder 461 drives the crushing knife 462 to rotate. Through the rotation of the crushing knife 462, on the one hand, the plastic in the collecting hopper 42 can be preliminarily crushed. The preliminarily crushed plastic is convenient for feeding and subsequent crushing by the crushing roller 44. On the other hand, it can stir the plastic, so as to disperse the plastic and avoid the plastic from accumulating in the collecting hopper 42 and causing blockage.

[0054] The crushing mechanism 4 further includes a feeding component 47 for intermittently feeding the plastics in the aggregate hopper 42; the feeding component 47 includes a liquid collecting pipe 472 fixedly installed on the mounting plate 41; a cavity 471 formed in the mounting plate 41; a liquid outlet pipe 473 connecting the cavity 471 and the liquid collecting pipe 472; a second piston plate 474 slidably installed in the liquid collecting pipe 472; a push rod 475 fixedly installed on the second piston plate 474, the top end of the push rod 475 penetrating through the liquid collecting pipe 472 and fixedly connected to the aggregate hopper 42; a return spring 476 for driving the second piston plate 474 to reset, one end of the return spring 476 being fixedly connected to the second piston plate 474 and the other end being fixedly connected to the inner wall of the liquid collecting pipe 472; a liquid supply unit 477 for supplying hydraulic oil into the liquid collecting pipe 472; the liquid supply unit 477 includes a fixed cylinder 4771 fixedly installed at the bottom of the mounting plate 41; a first piston plate 4772 slidably installed in the fixed cylinder 4771; a movable rod 4773 fixedly connected to the first piston plate 4772, the bottom end of the movable rod 4773 penetrating through the fixed cylinder 4771 and fixedly connected to the movable frame 553; a bladder 4774 fixedly installed between the first piston plate 4772 and the fixed cylinder 4771; a liquid inlet pipe 4775 connecting the bladder 4774 and the cavity 471.

[0055] When the movable frame 553 moves up and down reciprocally, it can synchronously drive the movable rod 4773 to move up and down reciprocally, thereby driving the first piston plate 4772 to move up and down reciprocally, and the first piston plate 4772 drives the bladder 4774 to be compressed and restored.

[0056] Since hydraulic oil is stored in both the bladder 4774, the cavity 471, and the liquid collecting pipe 472, when the bladder 4774 is squeezed, the hydraulic oil in the bladder 4774 is extruded and enters the cavity 471 through the liquid inlet pipe 4775. Thus, the hydraulic oil in the cavity 471 enters the collecting pipe 8 through the liquid outlet pipe 473, increasing the hydraulic pressure in the liquid collecting pipe 472. Further, it pushes the second piston plate 474 to move upward. The second movable plate drives the push rod 475 to move upward, compresses the return spring 476, and the push rod 475 drives the aggregate hopper 42 to move upward, making the discharge end of the aggregate hopper 42 close to the grinding cylinder 461, so that the grinding cylinder 461 closes the discharge end.

[0057] When the bladder 4774 is restored, the hydraulic oil in the cavity 471 is sucked into the bladder 4774. At this time, the elastic force of the return spring 476 drives the second piston plate 474 to reset downward, so that the aggregate hopper 42 resets downward. At this time, the discharge end of the aggregate hopper 42 is away from the grinding cylinder 461, and the discharge end discharges materials.

[0058] Moreover, through the up and down movement of the aggregate hopper 42, the plastics in the aggregate hopper 42 can be driven to move up and down, thereby expanding the crushing range of the crushing knife 462 and improving the crushing effect of the crushing knife 462.

[0059] In addition, when the grinding cylinder 461 rotates, it can grind the plastic crushed by the crushing knife 462 to a certain extent, further improving the crushing effect of the plastic in the hopper 42.

[0060] In the present invention, through the setting of the crushing mechanism 4, on the one hand, under the cooperation of the crushing knife 462 and the grinding cylinder 461, the plastic in the hopper 42 can be preliminarily crushed and ground, improving the preliminary crushing effect of the plastic in the hopper 42, which is beneficial to subsequent feeding and crushing. On the other hand, the discharge end of the hopper 42 is far from and close to the grinding cylinder 461, realizing intermittent feeding of the preliminarily crushed plastic, so that the plastic intermittently enters the crushing roller 44, which is beneficial to the full crushing of the plastic by the crushing roller 44. On the one hand, under the rotation of the crushing roller 44, the plastic can be crushed again, making the plastic completely crushed into granular form, improving the crushing effect of the plastic.

[0061] It should be added here that the movable rod 4773 is a rectangular rod, the through hole on the fixed cylinder 4771 through which the movable rod 4773 passes is a rectangular hole, and the rectangular rod matches the rectangular hole. Through the mutual cooperation of the rectangular rod and the rectangular hole, it plays a further limiting role on the movable frame 553, ensuring the stability of the movable frame 553 when moving up and down reciprocally.

[0062] The material return mechanism 6 includes: a return pipe 61 communicating with the first discharge hopper 53 and the second discharge hopper 54; a blower 62 communicating with the return pipe 61; the discharge end of the return pipe 61 is communicated with the processing box 3; the blower 62 is fixedly installed on the granulator main body 1, and the blower 62 is preferably a Roots blower 62.

[0063] The large plastic particles discharged through the first discharge hopper 53 and the medium plastic particles discharged through the second discharge hopper 54 both enter the return pipe 61.

[0064] While starting the power mechanism 7, start the blower 62. The wind generated by the blower 62 can transport the large plastic particles and the medium plastic particles along the path of the return pipe 61 to the hopper 42, so as to crush the unqualified plastic particles, ensure that the plastic particles entering the granulator main body 1 are all qualified particles, and avoid the unqualified plastic particles entering the granulator main body 1 and causing uneven heating, which affects the granulation quality of the plastic particles.

[0065] It should be added here that since the large plastic particles and the medium plastic particles are transported to the hopper 42 by pneumatic conveying, the gas entering the hopper 42 blows downward. On the one hand, it can disperse the crushed plastic in the hopper 42, avoiding plastic accumulation and affecting feeding. On the other hand, the dispersed plastic can contact the crushing knife 462 again, further improving the crushing effect.

[0066] It should be added here that the gas entering the processing box 3 through the return pipe 61 can be discharged through the feeding opening. By providing the filter screen plate, plastic particles can be prevented from being discharged from the feeding opening along with the air flow.

[0067] The power mechanism 7 includes: a transmission member 71; and a motor 72 that drives the transmission member 71 to rotate.

[0068] The transmission member 71 is preferably a sprocket, a chain, or a timing belt and a timing pulley; the motor 72 is fixedly installed on the processing box 3.

[0069] In this embodiment, three sprockets are provided. The first sprocket is coaxially connected to the driving bevel gear 464, the second sprocket is coaxially connected to the rotating plate 551, and the third sprocket is coaxially connected to any one of the crushing rollers 44. The three sprockets are meshed and driven by the chain, and the output end of the motor 72 can be fixedly connected to any one of the sprockets.

[0070] It should be added here that a tension pulley can be provided in the transmission member 71 to ensure that the three sprockets are always meshed with the chain, thereby ensuring the stable transmission of the transmission member 71.

[0071] In the present invention, through the mutual cooperation of the crushing mechanism 4, the screening mechanism 5, the return mechanism 6, and the power mechanism 7, plastics can be crushed and screened multiple times, and the unqualified plastic particles screened out can be sent back for re-crushing and screening, thereby improving the crushing and screening efficiency of plastics, making the particle size of plastic particles uniform, and avoiding the problem that the melting degrees of plastic particles with different particle sizes are not uniform, which affects the granulation quality of plastic particles.

[0072] It further includes: a gas collecting pipe 8 rotatably installed in the processing box 3; a spray head 9 communicating with the gas collecting pipe 8; a transmission gear 13 fixedly sleeved on the gas collecting pipe 8; a rack 12 meshed with the transmission gear 13, and the rack 12 is fixedly connected to the movable frame 553; an air outlet pipe 11 communicating the gas collecting pipe 8 with the fixed cylinder 4771; an air inlet pipe 10 communicating with the fixed cylinder 4771, the intake end of the air inlet pipe 10 is located outside the processing box 3, and one-way valves are installed on both the air inlet pipe 10 and the air outlet pipe 11 to ensure that air enters the fixed cylinder 4771 through the air inlet pipe 10 and is discharged through the air outlet pipe 11.

[0073] When the movable frame 553 moves up and down reciprocally, it can drive the rack 12 to move up and down reciprocally, thereby driving the transmission gear 13 to swing reciprocally. The transmission gear 13 drives the gas collecting pipe 8 to swing reciprocally, and the gas collecting pipe 8 drives the spray head 9 to swing.

[0074] Meanwhile, when the first piston plate 4772 moves up and down, it can suck the outside air into the fixed cylinder 4771 through the air inlet pipe 10, deliver it to the gas collecting pipe 8 through the air outlet pipe 11, and then spray it out through the plurality of spray heads 9.

[0075] Since the second sieve plate 52 screens smaller plastic particles, the sieve holes are smaller and prone to blockage. The gas ejected from the nozzle 9 blows from the bottom of the second sieve plate 52 to the top, so that the plastic particles blocked in the sieve holes can be blown out, avoiding the blockage of the sieve holes.

[0076] In addition, to ensure the cleaning effect of the sieve holes of the second sieve plate 52, an air pump (not shown) is externally connected to the air collecting pipe 8. When the blockage of the sieve plate is relatively serious, high-pressure gas is conveyed into the air collecting pipe 8 through the air pump, thus ensuring the cleaning effect of the sieve holes.

[0077] Due to the swing of the nozzle 9, the jet range of the second sieve plate 52 is enlarged, thus improving the cleaning effect of the second sieve plate 52.

[0078] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. The machines, parts and equipment all adopt conventional models in the prior art. Coupled with the circuit connection adopting the conventional connection method in the prior art, details are not described herein. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0079] It should be understood that those of ordinary skill in the art can make improvements or changes according to the above description, and all such improvements and changes should fall within the protection scope of the appended claims of the present invention.

Claims

1. A regenerated plastic granule granulating device, characterized in that, Including: The granulator main body; a feed hopper fixedly installed at the feed inlet of the granulator main body; a treatment box communicated with the feed hopper; a crushing mechanism for crushing plastics; a screening mechanism for screening plastic particles; a return material mechanism for retransmitting the unqualified plastic particles after screening to the crushing mechanism for re-crushing; a power mechanism for driving the crushing mechanism and the screening mechanism to operate; The screening mechanism includes: a first sieve plate; a second sieve plate; a first discharge hopper and a second discharge hopper inserted and installed on the treatment box; a vibration assembly for driving the first sieve plate and the second sieve plate to vibrate; The vibration assembly includes: a rotating plate rotatably installed in the treatment box; a round rod rotatably installed on the rotating plate; a movable frame slidably installed on the round rod; a linkage rod hinged between the movable frame and the first sieve plate; a connecting plate fixedly installed on the second sieve plate; a fixing plate fixedly installed in the treatment box; a linkage spring fixedly installed between the fixing plate and the connecting plate.

2. The granulating device for recycled plastic particles according to claim 1, characterized in that, The rotating plate is petal-shaped, and the connecting plate is located at the bottom of the rotating plate.

3. A regenerated plastic pellet granulation device according to claim 1, characterized in that, The discharge end of the first sieve plate is hinged and installed in the first discharge hopper, and the discharge end of the second sieve plate is hinged and installed in the second discharge hopper.

4. A regenerated plastic pellet granulating device according to claim 1, wherein, The crushing mechanism includes: a mounting plate fixedly installed in the treatment box; a circular opening opened on the mounting plate; an aggregate hopper slidably installed in the circular opening; a mounting frame fixedly installed at the bottom of the mounting plate; a crushing roller rotatably installed in the mounting frame; a linkage gear coaxially connected with the crushing roller.

5. The granulating device for recycled plastic particles according to claim 4, characterized in that, The crushing mechanism further includes: an anti-blocking component for preventing the plastics in the aggregate hopper from being blocked; The anti-blocking component includes: a grinding cylinder rotatably installed in the treatment box; a crushing knife fixedly installed on the grinding cylinder; a driven bevel gear coaxially connected with the grinding cylinder; a driving bevel gear meshed and connected with the driven bevel gear; the driving bevel gear is rotatably installed in the treatment box.

6. The granulating device for recycled plastic particles according to claim 4, wherein The crushing mechanism further includes: a feeding component for intermittently feeding the plastics in the aggregate hopper; The feeding component includes: a liquid collecting pipe fixedly installed on the mounting plate; a cavity opened on the mounting plate; a liquid outlet pipe communicating the cavity and the liquid collecting pipe; a second piston plate slidably installed in the liquid collecting pipe; a top rod fixedly installed on the second piston plate; a return spring for driving the second piston plate to reset; a liquid supply unit for supplying hydraulic oil into the liquid collecting pipe.

7. The granulation device for recycled plastic particles according to claim 6, wherein, The liquid supply unit includes: a fixed cylinder fixedly installed at the bottom of the mounting plate; a first piston plate slidably installed in the fixed cylinder; a movable rod fixedly connected with the first piston plate; a bladder fixedly installed between the first piston plate and the fixed cylinder; a liquid inlet pipe communicating the bladder and the cavity.

8. The granulating device for recycled plastic particles according to claim 1, characterized in that, The return material mechanism includes: a return pipe communicated with the first discharge hopper and the second discharge hopper; a blower communicated with the return pipe; the discharge end of the return pipe is communicated with the treatment box.

9. The granulating device for recycled plastic particles as described in claim 1, characterized in that, The power mechanism includes: a transmission part; a motor for driving the transmission part to rotate.

10. The granulating device for recycled plastic particles according to claim 7, wherein, Also included: A gas collecting pipe rotatably installed in the treatment box; a spray head communicated with the gas collecting pipe; A transmission gear fixedly sleeved on the collecting pipe; a rack meshed and connected with the transmission gear; An air outlet pipe connecting the collecting pipe and the fixed cylinder; an air inlet pipe communicated with the fixed cylinder.

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