Plastic granulator capable of screening plastic particles

Abstract

The invention relates to the technical field of plastic mechanical equipment, and discloses a plastic granulator capable of screening plastic particles. The cutting device is used for cutting plastic particles; the screening device is used for screening plastic particles; the turning device is used for turning the plastic particles; an extruder and a cooling tank are installed on the operation table, an installation frame is installed on the operation table, the screening device comprises a discharging groove, the discharging groove is installed on the operation table through a spring, a screening hopper is installed on the discharging groove, and a first screen, a second screen and a third screen are arranged in the screening hopper. Through cooperation of the cutting device and the screening device, cut plastic particles are screened in the screening hopper in a vibration screening mode, the plastic particles with different particle sizes are conveyed to different procedures through the three sliding grooves of the discharging groove, the plastic particles are stored in a classified mode according to the particle sizes, and the quality of the plastic particles is improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic machinery and equipment, and in particular to a plastic granulator capable of screening plastic particles. Background Art

[0002] Plastic granulator is a kind of equipment used to recycle and reprocess waste plastic into granular plastic. These granules can be used to produce new plastic products. Plastic granulator plays an important role in plastic recycling and reuse. Plastic granulator heats plastic through heating cylinder to make it molten. Molten plastic is extruded through the die to form continuous plastic strips or sheets. After the cooling system cools these strips or sheets of plastic, the cutting machine cuts them into uniform particles. Plastic granulator processes waste plastic into particles through a series of physical and chemical processes, which is efficient and environmentally friendly. This process not only helps to recycle resources, but also provides a basis for reuse in the plastic industry.

[0003] Chinese patent CN212707496U discloses a "plastic granulator", including a bracket, a screw, a mold, a barrel, a hopper, a cooling mechanism, a driving mechanism and a plurality of heating mechanisms; the driving mechanism is arranged at one end of the top of the bracket, and the driving mechanism is drivingly connected to one end of the screw, the barrel is fixedly connected to the other end of the top of the bracket, and the barrel is provided with a receiving cavity running through both ends of its length direction, the hopper is arranged at the top of the barrel, the other end of the screw is arranged in the receiving cavity, the heating mechanism is arranged at the bottom of the barrel, the cooling mechanism is arranged at the top of the barrel, and the mold is arranged at the output end of the barrel; the waste plastic in the molten state is formed into plastic particles through the mold, the thickness is uniform, and a good plasticizing effect can be achieved, and the obtained plastic particles meet the requirements of the user, thereby improving the processing quality.

[0004] However, the prior art has the following problems: 1. In the process of plastic granulation, the existing technology often produces plastic particles of different sizes. The plastic particles of different sizes are mixed, collected and stored, which has a certain impact on the quality of the product and may also affect the subsequent use. Summary of the invention

[0005] The purpose of the present invention is to provide a plastic granulator capable of screening plastic particles in order to solve the above-mentioned problems and overcome the defects of the prior art, as described in detail below.

[0006] To achieve the above object, the present invention provides the following technical solutions: The present invention provides a plastic granulator capable of screening plastic particles, comprising: an operating table; a cutting device for cutting plastic particles; a screening device for screening plastic particles; and a turning device for turning plastic particles; an extruder and a cooling trough are installed on the operating table, a mounting frame is installed on the operating table, the cooling trough is located between the extruder and the mounting frame, the cutting device is arranged on the mounting frame, the screening device is arranged on the operating table, the turning device is arranged on the screening device, and the mounting frame is located between the cooling trough and the screening device; the cutting device comprises a guide cover, and the guide cover has a A rotating shaft is rotatably installed on the inner wall, a motor is installed on the operating table through a bracket, the output end of the motor is connected to the rotating shaft, and the outer wall of the rotating shaft is connected to a cutting roller; the screening device includes a discharge chute, which is installed on the operating table through a spring, a screen bucket is installed on the discharge chute, and a No. 1 screen, a No. 2 screen and a No. 3 screen are arranged in the screen bucket, two vibrating rods are installed on the outer wall of the screen bucket, a slave shaft is rotatably installed on the mounting frame, a belt is sleeved between the slave shaft and the rotating shaft, the outer wall of the slave shaft is connected to two elliptical wheels, and the two elliptical wheels are respectively in contact with two vibrating rods.

[0007] Preferably, an outer wall of the rotating shaft is connected to a bevel wheel, an inner wall of the air deflector is slidably mounted with a sliding rod, and a scraper is mounted on the sliding rod.

[0008] Preferably, one end of the sliding rod is configured to be in a fork shape, the fork-shaped end of the sliding rod is in contact with the inclined wheel, and the cutting roller is in contact with the scraper blade during rotation.

[0009] Preferably, the discharge chute is provided with three chutes, and the three chutes are respectively located below the No. 1 screen, the No. 2 screen and the No. 3 screen.

[0010] Preferably, sliders are slidably installed at the bottom of the No. 1 and No. 2 sieves, and a plurality of adjustment rods are respectively installed on the two sliders. The inner wall of the sieve bucket is slidably connected to two handles, and the two handles are respectively connected to the two sliders.

[0011] Preferably, the flipping device includes a reciprocating screw, which is installed on the outer wall of the screen bucket through a bracket, a worm gear is connected to the end of the reciprocating screw close to the slave shaft, and a worm is connected to the end of the slave shaft close to the reciprocating screw, a ball block is slidably installed on the inner wall of the screen bucket, and a roller is rotatably installed on the ball block.

[0012] Preferably, the worm contacts the worm wheel when rotating, and the outer wall of the roller is connected with a plurality of flapping strips.

[0013] Preferably, the outer wall of the reciprocating screw rod is provided with a reciprocating thread groove, and the inner wall of the ball block is slidably connected to the reciprocating thread groove via balls.

[0014] Preferably, a rack is installed on the inner wall of the discharge chute, and a gear is connected to the end of the roller away from the ball block, and the gear is meshed with the rack.

[0015] The beneficial effects are: 1. The plastic granulator capable of screening plastic particles, through the cooperation of the cutting device and the screening device, enables the cut plastic particles to be screened in the screening bucket by means of vibration screening, and the plastic particles of different particle sizes are transported to different processes through the three chutes of the discharging chute, so that the plastic particles are classified and stored according to the particle size, thereby improving the quality of the plastic particles; through the setting of the scraper, the scraper can continuously clean the cutting roller to avoid a large number of plastic particles adhering to the surface of the cutting roller and affecting the use; through the setting of multiple adjusting rods, the multiple adjusting rods can realize the adjustment of the sieve hole diameters of the No. 1 sieve and the No. 2 sieve, thereby improving the applicability of the screening device.

[0016] 2. The plastic granulator capable of screening plastic particles, through the setting of the flipping device, enables the roller and the plurality of flipping bars to cooperate to evenly spread the plastic particles in the screen bucket and promote the screening process of the plastic particles. Through the cooperation of the gear and the rack, the plurality of flipping bars can also rotate during the movement. The flipping bars can fully flip the plastic particles in the screen bucket by rotating, thereby further promoting the screening of the plastic particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the cutting device of the present invention; Figure 3 It is a schematic diagram of the structure of the air deflector of the present invention; Figure 4 It is a schematic diagram of the structure of the cutting roller of the present invention; Figure 5 It is a schematic structural diagram of the screening device of the present invention; Figure 6 It is a schematic diagram of the slave axis structure of the present invention; Figure 7 It is a schematic diagram of the structure of the regulating rod of the present invention; Figure 8 It is a schematic diagram of the structure of the flipping device of the present invention; Fig. 9 It is a schematic diagram of the rack structure of the present invention.

[0019] The accompanying drawings are marked as follows: 1. operating table; 11. mounting frame; 2. extruder; 3. cooling trough; 4. cutting device; 41. deflector; 42. motor; 43. rotating shaft; 44. cutting roller; 45. inclined wheel; 46. sliding rod; 47. scraper; 5. screening device; 51. discharging trough; 52. screening bucket; 53. No. 1 screen; 54. No. 2 screen; 55. No. 3 screen; 56. slave shaft; 57. belt; 58. elliptical wheel; 59. vibration rod; 510. handle; 511. slider; 512. adjusting rod; 6. flipping device; 61. worm; 62. worm wheel; 63. reciprocating screw; 64. ball block; 65. roller; 66. flipping bar; 67. gear; 68. rack. DETAILED DESCRIPTION

[0020] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0021] See also Figure 1 - Fig. 9 A plastic granulator capable of screening plastic particles comprises: an operating table 1, an extruder 2 and a cooling trough 3 are mounted on the operating table 1, a mounting frame 11 is mounted on the operating table 1, the cooling trough 3 is located between the extruder 2 and the mounting frame 11, a cutting device 4 is used to cut plastic particles, the cutting device 4 is arranged on the mounting frame 11, the cutting device 4 comprises a guide cover 41, a rotating shaft 43 is rotatably mounted on the inner wall of the guide cover 41, a motor 42 is mounted on the operating table 1 through a bracket, the output end of the motor 42 is connected to the rotating shaft 43, the outer wall of the rotating shaft 43 is connected to a cutting roller 44, and when the cutting roller 44 rotates, the solidified plastic particles are cut by cooperating with the guide cover 41. The strip-shaped plastic after cutting is cut into plastic particles; the outer wall of the rotating shaft 43 is connected with an inclined wheel 45, and the inner wall of the air deflector 41 is slidably installed with a sliding rod 46, and a scraper 47 is installed on the sliding rod 46. One end of the sliding rod 46 is set to a fork shape, and the end of the sliding rod 46 set to the fork shape contacts the inclined wheel 45. The cutting roller 44 contacts the scraper 47 during the rotation process. The inclined wheel 45 drives the sliding rod 46 to slide back and forth in the air deflector 41 through the cooperation with the fork-shaped end of the sliding rod 46. The sliding rod 46 drives the scraper 47 to move synchronously. The scraper 47 cleans the surface of the cutting roller 44 during the movement to prevent the plastic particles from adhering to the surface of the cutting roller 44; The screening device 5 is used to screen the plastic particles. The screening device 5 is arranged on the operating table 1. The mounting frame 11 is located between the cooling trough 3 and the screening device 5. The screening device 5 includes a discharge trough 51, which is mounted on the operating table 1 through a spring. A screen bucket 52 is installed on the discharge trough 51. A No. 1 screen 53, a No. 2 screen 54 and a No. 3 screen 55 are arranged in the screen bucket 52. The discharge trough 51 is provided with three slides, which are respectively located below the No. 1 screen 53, the No. 2 screen 54 and the No. 3 screen 55. The aperture of the No. 1 screen 53 is smaller than that of the No. 2 screen 54, and the aperture of the No. 2 screen 54 is smaller than that of the No. 3 screen 55. The No. 1 screen 53, the No. 2 screen 54 and the No. 3 screen 55 form an inclined surface, and the No. 3 screen 55 is located at the bottom. At the lower part, the plastic particles first pass through the No. 1 screen 53, so that the plastic particles with smaller particle size fall into the discharge trough 51, and the remaining plastic particles pass through the No. 2 screen 54, so that the plastic particles with medium particle size fall into the discharge trough 51, and the plastic particles with larger particle size pass through the No. 3 screen 55 and fall into the discharge trough 51. The three slides of the discharge trough 51 respectively catch the plastic particles under the No. 1 screen 53, the No. 2 screen 54 and the No. 3 screen 55, and slide the plastic particles to the corresponding process respectively, so as to achieve the effect of screening the plastic particles; the outer wall of the screen bucket 52 is equipped with two vibrating rods 59, and a slave shaft 56 is rotatably installed on the mounting frame 11, and a belt 57 is sleeved between the slave shaft 56 and the rotating shaft 43, and the outer wall of the slave shaft 56 is connected to the two The elliptical wheel 58 is in contact with two vibration rods 59 respectively. When the shaft 56 rotates, the two elliptical wheels 58 are driven to rotate. When the two elliptical wheels 58 rotate, the two vibration rods 59 are driven to vibrate through contact. The two vibration rods 59 drive the discharge trough 51 and the screen bucket 52 to vibrate. The screen bucket 52 promotes the plastic particles inside it to pass through the No. 1 screen 53, the No. 2 screen 54 and the No. 3 screen 55 for screening. The bottom of the No. 1 screen 53 and the No. 2 screen 54 is slidably installed with a slider 511, and a plurality of adjustment rods 512 are respectively installed on the two sliders 511. The inner wall of the screen bucket 52 is slidably connected to two handles 510, and the two handles 510 are respectively connected to the two sliders 511. 12 can adjust the aperture of the sieve holes on the No. 1 sieve 53 and the No. 2 sieve 54 when moving. The staff can adjust the aperture of the sieve holes on the No. 1 sieve 53 and the No. 2 sieve 54 through the handle 510 according to different needs to meet different processing needs; through the cooperation of the cutting device 4 and the screening device 5, the cut plastic particles are screened in the screen bucket 52 by vibration screening, and the plastic particles of different particle sizes are transported to different processes through the three chutes of the discharge trough 51, so that the plastic particles are classified and stored according to the particle size, thereby improving the quality of the plastic particles; through the setting of the scraper 47, the scraper 47 can continuously clean the cutting roller 44 to avoid a large number of plastic particles adhering to the surface of the cutting roller 44 and affecting the use;By setting a plurality of adjusting rods 512, the plurality of adjusting rods 512 can adjust the apertures of the first screen 53 and the second screen 54, thereby improving the applicability of the screening device 5. ;

[0022] For further information, see Figure 7 - Fig. 9 , a turning device 6 is used to turn over the plastic particles. The turning device 6 is arranged on the screening device 5. The turning device 6 includes a reciprocating screw rod 63, which is installed on the outer wall of the screen bucket 52 through a bracket. The end of the reciprocating screw rod 63 close to the slave shaft 56 is connected to a worm wheel 62, and the end of the slave shaft 56 close to the reciprocating screw rod 63 is connected to a worm 61. A ball block 64 is slidably installed on the inner wall of the screen bucket 52, and a roller 65 is rotatably installed on the ball block 64. During the movement, the roller 65 spreads the plastic particles in the screen bucket 52 evenly to promote the screening process of the plastic particles. The worm 61 contacts the worm wheel 62 when rotating. The outer wall of the roller 65 is connected to a plurality of turning bars 66. The plurality of turning bars 66 on the roller 65 can promote the plastic particles to pass through the sieve holes. The outer wall of the reciprocating screw rod 63 is provided with a reciprocating thread groove. The inner wall of the ball block 64 is slidably connected to the reciprocating thread groove through the ball. The reciprocating screw rod 63 is connected to the outer wall of the reciprocating screw rod 63. The cooperation of the reciprocating thread groove and the ball drives the ball block 64 to slide back and forth. A rack 68 is installed on the inner wall of the discharge trough 51. A gear 67 is connected to the end of the roller 65 away from the ball block 64. The gear 67 is meshed with the rack 68. When the gear 67 moves, it rotates due to the meshing action of the rack 68. When the gear 67 rotates, it drives the roller 65 to rotate. When the roller 65 rotates, it drives the multiple flipping bars 66 to rotate. The multiple flipping bars 66 can further promote the screening of plastic particles by rotating. Through the setting of the flipping device 6, the roller 65 and the multiple flipping bars 66 can cooperate to evenly spread the plastic particles in the screen bucket 52 and promote the screening process of the plastic particles. Through the cooperation of the gear 67 and the rack 68, the multiple flipping bars 66 can also rotate during the movement. The flipping bars 66 can fully flip the plastic particles in the screen bucket 52 by rotating, further promoting the screening of the plastic particles.

[0023] With the above structure, the working principle of this case is that the extruder 2 melts the plastic and extrude it, and the strip molten plastic passes through the cooling groove 3 and is cooled and solidified before entering the guide cover 41. After the motor 42 is started, it drives the rotating shaft 43 to rotate, and the rotating shaft 43 drives the cutting roller 44 to rotate. When the cutting roller 44 rotates, it cooperates with the guide cover 41 to cut the solidified strip plastic into plastic particles, and the plastic particles slide along the guide cover 41 into the screen bucket 52. While the rotating shaft 43 rotates, the rotating shaft 43 drives the inclined wheel 45 to rotate, and the inclined wheel 45 drives the sliding rod 46 to slide back and forth in the guide cover 41 through the cooperation with the fork-shaped end of the sliding rod 46, and the sliding rod 46 drives the scraper 47 to move synchronously, and the scraper 47 cleans the surface of the cutting roller 44 during the movement. The rotating shaft 43 rotates to drive the slave shaft 56 to rotate through the belt 57, and the slave shaft 56 rotates to drive the two elliptical wheels 58 to rotate. When the two elliptical wheels 58 rotate, they drive the two vibration rods 59 to vibrate through contact, and the two vibration rods 59 drive the discharge trough 51 and the screen bucket 52 to vibrate. The screen bucket 52 promotes the plastic particles inside it to pass through the No. 1 screen 53, the No. 2 screen 54 and the No. 3 screen 55 for screening through the vibration. The aperture of the No. 1 screen 53 is smaller than that of the No. 2 screen 54, and the aperture of the No. 2 screen 54 is smaller than that of the No. 3 screen 55. The No. 1 screen 53, the No. 2 screen 54 and the No. 3 screen 55 form an inclined plane, and the No. 3 screen 55 is located at the lowest point. The plastic particles first pass through the No. 1 screen 53, the No. 2 screen 54 and the No. 3 screen 55. The screen 53 allows the plastic particles with smaller particle sizes to fall into the discharge trough 51, and the remaining plastic particles pass through the No. 2 screen 54, so that the plastic particles with medium particle sizes fall into the discharge trough 51, and the plastic particles with larger particle sizes pass through the No. 3 screen 55 and fall into the discharge trough 51. The three slides of the discharge trough 51 respectively catch the plastic particles under the No. 1 screen 53, the No. 2 screen 54 and the No. 3 screen 55, and slide the plastic particles to the corresponding process respectively, so as to achieve the effect of screening the plastic particles; the staff can adjust the positions of the two sliders 511 respectively through the two handles 510, and when the slider 511 moves, it drives the multiple adjustment rods 512 above it to move, because the multiple adjustment rods 512 can block the No. 1 screen 53 and the No. 2 screen 54, and the plastic particles under the No. 3 screen 55 can be slid .... The mesh holes of the screen 54 enable the adjustment rod 512 to adjust the aperture of the mesh holes when it moves. The staff can adjust the aperture of the mesh holes of the No. 1 screen 53 and the No. 2 screen 54 through the handle 510 according to different needs to meet different processing needs; through the cooperation of the cutting device 4 and the screening device 5, the cut plastic particles are screened in the screen bucket 52 by vibration screening, and the plastic particles of different particle sizes are transported to different processes through the three chutes of the discharge trough 51, so that the plastic particles are classified and stored according to the particle size, thereby improving the quality of the plastic particles; through the setting of the scraper 47, the scraper 47 can continuously clean the cutting roller 44 to avoid a large number of plastic particles adhering to the surface of the cutting roller 44 and affecting the use;By setting a plurality of adjusting rods 512, the plurality of adjusting rods 512 can adjust the apertures of the first screen 53 and the second screen 54, thereby improving the applicability of the screening device 5. ;

[0024] When the slave shaft 56 rotates, the worm gear 62 is driven to rotate through the worm 61, and the worm gear 62 drives the reciprocating screw 63 to rotate. The reciprocating screw 63 drives the ball block 64 to slide back and forth through the cooperation of the reciprocating thread groove and the ball, and the ball block 64 drives the roller 65 to move back and forth. During the movement of the roller 65, the plastic particles in the screen bucket 52 are spread evenly to promote the screening process of the plastic particles. The multiple flipping bars 66 on the roller 65 can promote the plastic particles to pass through the sieve holes. When the roller 65 moves, the roller 65 drives the gear 67 to move. When the gear 67 moves, it is meshed with the rack 68 to generate When the gear 67 rotates, the roller 65 is driven to rotate, and when the roller 65 rotates, the multiple flipping bars 66 are driven to rotate. The multiple flipping bars 66 can further promote the screening of the plastic particles by rotating. Through the setting of the flipping device 6, the roller 65 and the multiple flipping bars 66 can cooperate to evenly spread the plastic particles in the screen bucket 52 and promote the screening process of the plastic particles. Through the cooperation of the gear 67 and the rack 68, the multiple flipping bars 66 can also rotate during the movement. The flipping bars 66 can fully flip the plastic particles in the screen bucket 52 by rotating, thereby further promoting the screening of the plastic particles.

[0025] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A plastic granulator capable of screening plastic particles, characterized in that: include: Operation table (1); A cutting device (4) for cutting plastic particles; A screening device (5) for screening plastic particles; A turning device (6) for turning the plastic particles; An extruder (2) and a cooling trough (3) are mounted on the operating table (1); a mounting frame (11) is mounted on the operating table (1); the cooling trough (3) is located between the extruder (2) and the mounting frame (11); the cutting device (4) is arranged on the mounting frame (11); the screening device (5) is arranged on the operating table (1); the flipping device (6) is arranged on the screening device (5); and the mounting frame (11) is located between the cooling trough (3) and the screening device (5); The cutting device (4) comprises a deflector (41), a rotating shaft (43) is rotatably mounted on the inner wall of the deflector (41), a motor (42) is mounted on the operating table (1) via a bracket, an output end of the motor (42) is connected to the rotating shaft (43), and a cutting roller (44) is connected to the outer wall of the rotating shaft (43); The screening device (5) comprises a discharge trough (51), the discharge trough (51) being mounted on an operating table (1) via a spring, a screen bucket (52) being mounted on the discharge trough (51), a No. 1 screen (53), a No. 2 screen (54) and a No. 3 screen (55) being arranged in the screen bucket (52), two vibration rods (59) being mounted on the outer wall of the screen bucket (52), a slave shaft (56) being rotatably mounted on the mounting frame (11), a belt (57) being sleeved between the slave shaft (56) and the rotating shaft (43), the outer wall of the slave shaft (56) being connected to two elliptical wheels (58), the two elliptical wheels (58) being in contact with two vibration rods (59) respectively.

2. A plastic granulator capable of screening plastic particles according to claim 1, characterized in that: The outer wall of the rotating shaft (43) is connected to a bevel wheel (45), the inner wall of the air deflector (41) is slidably mounted with a sliding rod (46), and a scraper (47) is mounted on the sliding rod (46).

3. A plastic granulator capable of screening plastic particles according to claim 2, characterized in that: One end of the sliding rod (46) is configured in a fork shape, and the fork-shaped end of the sliding rod (46) contacts the inclined wheel (45), and the cutting roller (44) contacts the scraper (47) during rotation.

4. A plastic granulator capable of screening plastic particles according to claim 3, characterized in that: The discharge chute (51) is provided with three chutes, and the three chutes are respectively located below the No. 1 screen (53), the No. 2 screen (54), and the No. 3 screen (55).

5. A plastic granulator capable of screening plastic particles according to claim 4, characterized in that: Slide blocks (511) are slidably mounted on the bottom of the No. 1 sieve (53) and the No. 2 sieve (54), and a plurality of adjustment rods (512) are respectively mounted on the two slide blocks (511). Two handles (510) are slidably connected to the inner wall of the sieve bucket (52), and the two handles (510) are respectively connected to the two slide blocks (511).

6. A plastic granulator capable of screening plastic particles according to claim 5, characterized in that: The flipping device (6) comprises a reciprocating screw (63), the reciprocating screw (63) being mounted on the outer wall of the sieve bucket (52) via a bracket, the end of the reciprocating screw (63) close to the slave shaft (56) being connected to a worm wheel (62), the end of the slave shaft (56) close to the reciprocating screw (63) being connected to a worm (61), a ball block (64) being slidably mounted on the inner wall of the sieve bucket (52), and a roller (65) being rotatably mounted on the ball block (64).

7. A plastic granulator capable of screening plastic particles according to claim 6, characterized in that: The worm (61) contacts the worm wheel (62) when rotating, and the outer wall of the roller (65) is connected to a plurality of flapping strips (66).

8. A plastic granulator capable of screening plastic particles according to claim 7, characterized in that: The outer wall of the reciprocating screw rod (63) is provided with a reciprocating thread groove, and the inner wall of the ball block (64) is slidably connected to the reciprocating thread groove via balls.

9. A plastic granulator capable of screening plastic particles according to claim 8, characterized in that: A rack (68) is installed on the inner wall of the discharge trough (51), and a gear (67) is connected to one end of the roller (65) away from the ball block (64), and the gear (67) is meshed with the rack (68).

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