CN115213102A

CN115213102A - Screening plant is used in plastic granules production

Info

Publication number: CN115213102A
Application number: CN202211145698.7A
Authority: CN
Inventors: 许阳
Original assignee: Yangzhou Pansheng Nano New Material Technology Co ltd
Current assignee: Yangzhou Pansheng Nano New Material Technology Co ltd
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2022-10-21
Anticipated expiration: 2042-09-20
Also published as: CN115213102B

Abstract

The invention discloses a screening device for plastic particle production, which relates to the technical field of plastic particle screening and solves the technical problem that the screening effect is poor when a certain substance is excessive in the original screening equipment; the dust board receives the effect of pressure, alright rotate in the pan feeding inslot, rotates the in-process, makes the conflict spring produce deformation, gets into to go into hopper inside back completely when plastic granules, and the conflict spring resets, makes the dust board resume to primary position department, alright will empty the produced dust of in-process and fully block, avoid empting the produced dust of in-process and cause the influence to outside personnel.

Description

Screening plant is used in plastic granules production

Technical Field

The invention belongs to the technical field of plastic particle screening, and particularly relates to a screening device for plastic particle production.

Background

The plastic particles refer to granular plastics, and are subdivided into thousands of types, common plastic particles comprise general plastics, engineering plastics and special plastics, a large amount of plastic residues can be generated in the production process of certain plastics, the internal diameter of the residues is smaller than that of the plastic particles, and the residues and the plastic particles are generally screened by a corresponding screening device.

The utility model discloses a utility model of CN208962224U relates to a screening plant for plastic pellet production, including base, support and shell, the shell passes through the support and links to each other with the base, be equipped with the spring on the support, the shell upper end is equipped with feed arrangement, the shell lower extreme is equipped with first discharge gate, the shell lower extreme is equipped with vibrating motor, both ends are equipped with the fixed plate about the shell inboard, be equipped with the screening bucket on the fixed plate, screening bucket bottom slope is equipped with the bottom plate, screening bucket upper end is equipped with the upper cover perpendicularly, from right side to left side is equipped with first screening net, the second screening net in proper order on the bottom plate, screening bucket left side is equipped with the second discharge gate, be equipped with the third discharge gate corresponding with the second discharge gate on the shell, be equipped with first through-hole, second through-hole and third through-hole on the bottom plate, the first through-hole sets up the right side of first screening net, the second through-hole sets up between first screening net and the second screening net, the third through-hole sets up in the left side of second screening net; the utility model discloses can carry out the secondary screening to plastic granules, effectively improve screening efficiency.

When screening the letter sorting to in plastic granules, screening plant generally adopts multiunit obliquely sieve and different types of aperture to filter plastic granules, plastic granules and the residue that corresponds roll on the sieve, through the roll effect, filter the residue, make the residue drop, this kind of mode, roll because of plastic granules all mixes together with the residue, if plastic granules is more, the residue is less, or a certain when too much, all can cause the screening effect not good, remaining residue is all more, if make the sieve that corresponds carry out the round trip movement, make plastic granules and residue dwell longer time, simultaneously also can not influence dropping by oneself of plastic granules, alright promote the screening effect between plastic granules and the plastics residue.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art; therefore, the invention provides a screening device for plastic particle production, which is used for solving the technical problem that the screening effect is poor when certain substances are excessive in the original screening equipment.

In order to achieve the above purpose, the embodiment according to the first aspect of the present invention provides a screening device for plastic particle production, including a frame body, wherein a feeding hopper is arranged at an upper end of the frame body, a control panel is arranged at one side of a front end surface of the frame body, a dust-proof mechanism is arranged inside the feeding hopper, two sets of side plates are arranged on a side surface of the frame body, a hydraulic cylinder is arranged at one side corner of the side plates, and a stretching rod is arranged at an output end of the hydraulic cylinder;

the upper end of the stretching rod is provided with a limiting sliding groove, one side of the front end of the side plate is provided with a limiting sliding block matched with the limiting sliding groove, the limiting sliding block slides in the limiting sliding groove and is used for supporting the stretching rod, the middle of the lower end of the stretching rod is provided with a swinging mechanism, and the swinging mechanism is used for driving the first screening part and the guide inclined rod to swing;

the first screening part is positioned at the upper part inside the frame body, and the guide inclined rod is positioned at the lower part inside the frame body;

a first adaptive disc connected with the swing mechanism is arranged in the middle of the inner part of the first screening part, and a second adaptive disc connected with the swing mechanism is arranged in the middle of the inner part of the guide inclined rod;

the first adaptive disc is connected with a first screening piece through a connecting rod, a first screen is arranged in the first screening piece, and a plurality of screening through grooves are formed in the first screen;

the screen is arranged in the guide inclined rod, and elastic cloth is fixedly connected between the two ends of the guide inclined rod and the frame body.

Preferably, the swing mechanism comprises an adaptive gear disc and a movable guide disc, the lower end surface of the stretching rod is provided with a plurality of meshing transmission teeth, and the stretching rod is in meshing connection with the adaptive gear disc through the meshing transmission teeth;

a movable guide post is arranged in the middle of the outer end of the adaptive gear disc and is positioned at the lower end of the adaptive gear disc;

adaptive arc wheels are arranged at two ends of the annular outer surface of the movable guide disc, and a movable guide groove is formed between two adjacent groups of adaptive arc wheels;

the arc-shaped surface of the adaptive arc wheel is in contact with the adaptive gear disc, the movable guide column is positioned in the movable guide groove and moves, two groups of penetrating columns are arranged in the frame body of the movable guide disc, and the two groups of penetrating columns are fixedly connected with the first adaptive disc and the second adaptive disc respectively.

Preferably, the dustproof mechanism comprises two groups of dust baffles, a feeding groove is formed in the feeding hopper, a middle plate is arranged at the upper end of the middle in the feeding groove, notches for mounting the dust baffles are formed in two sides of the middle plate, and movable bearings are rotatably arranged between the dust baffles and the notches;

put the pole under being provided with in the middle of the board lower extreme, pan feeding groove both sides border department all is provided with the side position piece, and the side position piece blocks the dust board, fixedly connected with conflict spring between dust board and the lower pole of putting.

Preferably, framework front end department is provided with the storage slag plate, and the inside storage area of storage slag plate is located the inside intermediate position department of framework, it all is provided with the side position down tube to be located storage slag plate top both sides department in the framework, is provided with the second screen cloth between two sets of side position down tubes, and the second screen cloth is used for carrying out the secondary screening to plastic granules.

Preferably, the clearance spout has been seted up to side position down tube terminal surface, and is adjacent two sets of it is provided with the clearance slider to slide between the clearance spout, the inside one end department of slag storage plate is provided with the elasticity rope, and elasticity rope and clearance slider fixed connection, clearance slider up end is the toper face, and the toper face is inconsistent with the second screen cloth.

Preferably, the bottom department of the inner part of the slag storage plate is provided with a built-in movable groove, the inner part of the built-in movable groove is provided with a built-in movable slag discharging plate in a sliding manner, the built-in movable slag discharging plate moves to the outer end, the slag storage plate is hollow, and the built-in movable slag discharging plate is used for discharging slag in the slag storage plate.

Preferably, discharge chutes are formed in the frame body at two sides of the guide inclined rod, and a slag discharge chute is formed in the middle of the bottom of the frame body;

and discharge plates corresponding to the discharge grooves are arranged on the front end face and the rear end face of the frame body.

Compared with the prior art, the invention has the beneficial effects that: the swing mechanism drives the movable guide disc to swing, the movable guide disc is connected with the first adaptive disc and the second adaptive disc through the inserting column, so that the first screening part and the guide inclined rod are driven to swing back and forth, plastic particles can stay at the upper ends of the first screening part and the guide inclined rod for a long time in the effective swing process, meanwhile, the plastic particles roll back and forth, and residues in the plastic particles can be fully removed, so that the screening effect is improved;

the dust blocking plate can rotate in the feeding groove under the action of pressure, the abutting spring is deformed in the rotating process, and after plastic particles completely enter the feeding hopper, the abutting spring resets to restore the dust blocking plate to the original position, so that dust generated in the pouring process can be fully blocked, and the influence of the dust generated in the pouring process on external personnel is avoided;

the effect is dragged to elasticity through the elasticity rope, drag the clearance slider, make the clearance slider slide in the clearance spout, the slip in-process, the oblique conical surface of clearance slider upper end just contradicts the second screen cloth, will remain and carry out abundant striking off in the inside residue of second screen cloth, avoid the residue to influence the subsequent cleaning work of second screen cloth, it takes out from storage slag plate inside to slag plate with built-in activity, the bottom of storage slag plate just is in the fretwork form this moment, the inside residue of storage slag plate just discharges through the groove that the fretwork produced.

Drawings

FIG. 1 is a perspective view of the overall structure of the present invention;

FIG. 2 is an enlarged view of area A of FIG. 1 in accordance with the present invention;

FIG. 3 is a plan view of the internal structure of the frame body according to the present invention;

FIG. 4 is a plan view of the internal structure of the hopper of the present invention;

FIG. 5 is a plan view of the internal structure of the first screening element of the present invention;

FIG. 6 is a plan view showing the internal structure of the frame body according to the present invention;

reference numerals: 1. a frame body; 11. a first screening element; 111. a first screen; 12. a connecting rod; 13. a material screening through groove; 14. a side inclined rod; 141. a second screen; 142. cleaning the chute; 143. cleaning the sliding part; 15. a slag notch; 16. a discharge chute; 17. a guiding inclined rod; 18. an elastic cloth; 2. feeding into a hopper; 21. a dust guard; 22. a feeding groove; 23. a middle-arranged plate; 24. a side bit block; 25. a lower rod is arranged; 26. against the spring; 3. a discharge plate; 4. a side board; 41. a limiting slide block; 5. a hydraulic cylinder; 6. a stretch rod; 61. a limiting chute; 62. meshing the transmission teeth; 63. a mating gear plate; 64. a movable guide post; 65. a movable guide disc; 651. a first adapter rod; 652. a second adapter rod; 66. adapting the arc wheel; 67. a movable guide groove; 7. a control panel; 8. a slag storage plate; 81. a movable slag discharging plate is arranged in the slag discharging device; 82. an elastic cord.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the application provides a screening device for plastic particle production, which includes a frame 1, wherein a feeding hopper 2 is arranged at the upper end of the frame 1, a control panel 7 is arranged at one side of the front end surface of the frame 1, a dustproof mechanism is arranged inside the feeding hopper 2, two groups of side plates 4 are arranged on the side surface of the frame 1, a hydraulic cylinder 5 is arranged at the edge of one side of each side plate 4, and a stretching rod 6 is arranged at the output end of each hydraulic cylinder 5;

referring to fig. 2, a limiting sliding groove 61 is formed at the upper end of the stretching rod 6, a limiting sliding block 41 adapted to the limiting sliding groove 61 is arranged at one side of the front end of the side plate 4, the limiting sliding block 41 slides in the limiting sliding groove 61, the limiting sliding block 41 is used for supporting the stretching rod 6, and a swinging mechanism is arranged in the middle of the lower end of the stretching rod 6 and is used for driving the first screening element 11 and the guiding inclined rod 17 to swing;

when the hydraulic cylinder 5 works, the stretching rod 6 is driven to stretch and move, and the path of the stretching rod 6 can not deviate in the moving process through the adaptive transmission action of the limiting sliding block 41 and the limiting sliding groove 61;

referring to fig. 3, the first screening element 11 is located at the upper part inside the frame 1, and the guiding diagonal rod 17 is located at the lower part inside the frame 1;

a first adaptive disc 651 connected with the swing mechanism is arranged in the middle of the interior of the first screening element 11, and a second adaptive disc 652 connected with the swing mechanism is arranged in the middle of the interior of the guide diagonal rod 17;

when the swing mechanism is linked, the first screening part 11 and the guide inclined rod 17 are effectively driven to swing back and forth through the adaptive transmission action of the first adaptive disk 651 and the second adaptive disk 652, so that the screening effect among plastic particles can be improved in the back and forth swinging process, and residues in the plastic particles can be effectively removed;

referring to fig. 5, the first adapting disc 651 is connected to the first screening element 11 by using a connecting rod 12, a first screen 111 is disposed inside the first screening element 11, and a plurality of screening through slots 13 are disposed inside the first screen 111;

a screen is arranged in the guide inclined rod 17, and elastic cloth 18 is fixedly connected between the two ends of the guide inclined rod 17 and the frame body 1;

the elastic cloth 18 is arranged to block the blank areas on the two sides of the guide inclined rod 17, so that plastic particles are prevented from falling below through the blank areas.

Referring to fig. 2, the swing mechanism includes an adaptive gear plate 63 and a movable guide plate 65, a plurality of meshing transmission teeth 62 are disposed on a lower end surface of the stretching rod 6, and the stretching rod 6 is meshed with the adaptive gear plate 63 through the meshing transmission teeth 62;

a movable guide post 64 is arranged in the middle of the outer end of the adaptive gear disc 63, and the movable guide disc 65 is positioned at the lower end of the adaptive gear disc 63;

adaptive arc wheels 66 are arranged at two ends of the annular outer surface of the movable guide disc 65, and a movable guide groove 67 is arranged between two adjacent groups of adaptive arc wheels 66;

the arc-shaped surface of the adaptive arc wheel 66 is in contact with the adaptive gear disc 63, when the movable guide disc 65 rotates, the rotation of the movable guide disc 65 cannot be blocked by the adaptive effect of the adaptive arc wheel 66, the movable guide column 64 is positioned in the movable guide groove 67 and moves, two groups of penetrating columns are arranged in the frame body 1 of the movable guide disc 65, and the two groups of penetrating columns are fixedly connected with the first adaptive disc 651 and the second adaptive disc 652 respectively;

when the hydraulic cylinder 5 works, the stretching rod 6 is driven to move back and forth, the adaptive gear disc 63 is driven to swing back and forth by the meshing transmission action between the meshing transmission teeth 62 and the adaptive gear disc 63 when the stretching rod 6 moves back and forth, the movable guide pillar 64 can directly move into the movable guide groove 67 when the stretching rod 6 swings back and forth, the corresponding movable guide disc 65 is driven to swing back and forth, the movable guide disc 65 is connected with the first adaptive disc 651 and the second adaptive disc 652 through the inserting column, so that the first screening part 11 and the guide inclined rod 17 are driven to swing back and forth, plastic particles can stay at the upper ends of the first screening part 11 and the guide inclined rod 17 for a long time in the effective swinging process, and can roll back and forth at the same time, so that residues in the plastic particles can be fully removed, and the screening effect is improved;

simultaneously first screening piece 11 is hollow globular, when carrying out preliminary screening again, alright reach better screening effect, get rid of too much residue, drop in slag storage plate 8, and outside personnel get rid of the residue of preliminary screening through slag storage plate 8.

Referring to fig. 4, the dust-proof mechanism includes two sets of dust-blocking plates 21, a feeding groove 22 is formed in the feeding hopper 2, a central plate 23 is disposed at the upper end of the middle of the feeding groove 22, notches for mounting the dust-blocking plates 21 are formed on two sides of the central plate 23, and a movable bearing is rotatably disposed between the dust-blocking plates 21 and the notches;

a lower rod 25 is arranged in the middle of the lower end of the middle plate 23, side blocks 24 are arranged at the edges of the two sides of the feeding groove 22, the side blocks 24 block the dust guard 21, and a collision spring 26 is fixedly connected between the dust guard 21 and the lower rod 25;

when outside personnel put in plastic granules to fender dirt board 21 upper end, a large amount of plastic granules have too much weight, just can produce pressure to fender dirt board 21, fender dirt board 21 receives the effect of pressure, alright rotate in pan feeding groove 22, rotate the in-process, make conflict spring 26 produce deformation, get into 2 inside backs of hopper when plastic granules completely, conflict spring 26 resets, make fender dirt board 21 resume to primary importance department, alright fully block empting the produced dust of in-process, avoid empting the produced dust of in-process and cause the influence to outside personnel.

Referring to fig. 6, a slag storage plate 8 is arranged at the front end of the frame body 1, a material storage area inside the slag storage plate 8 is located at the middle position inside the frame body 1, side oblique rods 14 are arranged at two sides of the frame body 1 above the slag storage plate 8, a second screen 141 is arranged between the two sets of side oblique rods 14, and the second screen 141 is used for secondary screening of plastic particles;

after plastic granules received the screening effect of first screening piece 11, dropped in side position down tube 14 upper end to roll in side position down tube 14 upper end simultaneously, at the roll in-process, produced residue just dropped in storage slag plate 8, so storage slag plate 8 need regularly clear up, avoids the inside residue of storage slag plate 8 too much.

The lower end surface of the side inclined rod 14 is provided with cleaning sliding chutes 142, a cleaning sliding member 143 is slidably arranged between two adjacent groups of the cleaning sliding chutes 142, one end inside the slag storage plate 8 is provided with an elastic rope 82, the elastic rope 82 is fixedly connected with the cleaning sliding member 143, the upper end surface of the cleaning sliding member 143 is a conical surface, and the conical surface is abutted against the second screen 141;

the flow of cleaning the slag storage plate 8 by external personnel is as follows:

step one, pulling the slag storage plate 8 to enable the slag storage plate 8 to move towards the outside of the frame body 1;

secondly, the cleaning sliding piece 143 is pulled through the elastic pulling action of the elastic rope 82, so that the cleaning sliding piece 143 slides in the cleaning sliding groove 142, and in the sliding process, the inclined conical surface at the upper end of the cleaning sliding piece 143 collides with the second screen 141, so that residues remained in the second screen 141 are fully scraped, and the subsequent cleaning work of the second screen 141 is prevented from being influenced by the residues;

step three, through setting up in the outside round cap of built-in activity slag plate 81, take out built-in activity slag plate 81 from storing up the slag plate 8 inside, the bottom of storing up slag plate 8 just is in the fretwork form this moment, and the inside residue of storing up slag plate 8 just discharges through the groove that the fretwork produced, so outside personnel need place the rubbish storage tank that corresponds in advance, accomplish the cleaning work to the residue.

Store up 8 inside bottoms departments of slag plate and seted up built-in movable groove, and the inside slip of built-in movable groove is provided with built-in activity slag plate 81, and built-in activity slag plate 81 removes to outer end department, and slag plate 8 presents the fretwork form, and built-in activity slag plate 81 is used for discharging the slag charge of storing up 8 inside of slag plate.

Discharge chutes 16 are formed in the frame body 1 at two sides of the guide inclined rod 17, and a slag discharge chute 15 is formed in the middle of the bottom of the frame body 1;

the front end face and the rear end face of the frame body 1 are provided with discharge plates 3 corresponding to the discharge grooves 16.

The working principle of the invention is as follows: when the hydraulic cylinder 5 works, the stretching rod 6 is driven to move back and forth, the adaptive gear disc 63 is driven to swing back and forth by the meshing transmission action between the meshing transmission teeth 62 and the adaptive gear disc 63 when the stretching rod 6 moves back and forth, the movable guide pillar 64 can directly move into the movable guide groove 67 when the stretching rod 6 swings back and forth, the corresponding movable guide disc 65 is driven to swing back and forth, the movable guide disc 65 is connected with the first adaptive disc 651 and the second adaptive disc 652 through the inserting column, so that the first screening part 11 and the guide inclined rod 17 are driven to swing back and forth, plastic particles can stay at the upper ends of the first screening part 11 and the guide inclined rod 17 for a long time in the effective swinging process, and can roll back and forth at the same time, so that residues in the plastic particles can be fully removed, and the screening effect is improved;

the dust blocking plate 21 can rotate in the feeding groove 22 under the action of pressure, the abutting spring 26 is deformed in the rotating process, and after plastic particles completely enter the feeding hopper 2, the abutting spring 26 resets to restore the dust blocking plate 21 to the original position, so that dust generated in the pouring process can be fully blocked, and the influence of the dust generated in the pouring process on external personnel is avoided;

drag the effect through elasticity of elastic cord 82, drag clearance slider 143, make clearance slider 143 slide in clearance spout 142, the slip in-process, the oblique conical surface of clearance slider 143 upper end just contradicts second screen cloth 141, will remain the residue of depositing in second screen cloth 141 fully strikes off, avoid the residue to influence the subsequent cleaning work of second screen cloth 141, take out built-in movable slag discharging plate 81 from slag discharging plate 8 is inside, slag discharging plate 8's bottom just is in the fretwork form this moment, the inside residue of slag discharging plate 8 just discharges through the groove that the fretwork produced.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims

1. The screening device for plastic particle production comprises a frame body (1), wherein a feeding hopper (2) is arranged at the upper end of the frame body (1), and a control panel (7) is arranged at one side of the front end face of the frame body (1), and is characterized in that a dustproof mechanism is arranged in the feeding hopper (2), two groups of side plates (4) are arranged on the side face of the frame body (1), a hydraulic cylinder (5) is arranged at one side edge of each side plate (4), and a stretching rod (6) is arranged at the output end of each hydraulic cylinder (5);

a limiting sliding groove (61) is formed in the upper end of the stretching rod (6), a limiting sliding block (41) matched with the limiting sliding groove (61) is arranged on one side of the front end of the side plate (4), the limiting sliding block (41) slides in the limiting sliding groove (61), the limiting sliding block (41) is used for supporting the stretching rod (6), a swinging mechanism is arranged in the middle of the lower end of the stretching rod (6), and the swinging mechanism is used for driving the first screening part (11) and the guide inclined rod (17) to swing;

the first screening part (11) is positioned at the upper part inside the frame body (1), and the guide inclined rod (17) is positioned at the lower part inside the frame body (1);

a first adaptive disc (651) connected with the swing mechanism is arranged in the middle of the interior of the first screening element (11), and a second adaptive disc (652) connected with the swing mechanism is arranged in the middle of the interior of the guide diagonal rod (17);

the first adapting disc (651) is connected with a first screening piece (11) through a connecting rod (12), a first screen (111) is arranged inside the first screening piece (11), and a plurality of screening through grooves (13) are formed in the first screen (111);

the screen is arranged inside the guide diagonal rod (17), and elastic cloth (18) is fixedly connected between the two ends of the guide diagonal rod (17) and the frame body (1).

2. The screening device for plastic particle production according to claim 1, wherein the swing mechanism comprises an adaptive gear disc (63) and a movable guide disc (65), a plurality of meshing transmission teeth (62) are formed on the lower end surface of the stretching rod (6), and the stretching rod (6) is in meshing connection with the adaptive gear disc (63) through the meshing transmission teeth (62);

a movable guide post (64) is arranged in the middle of the outer end of the adaptive gear disc (63), and the movable guide disc (65) is positioned at the lower end of the adaptive gear disc (63);

adaptive arc wheels (66) are arranged at two ends of the annular outer surface of the movable guide disc (65), and a movable guide groove (67) is arranged between two adjacent groups of adaptive arc wheels (66);

the arc-shaped face of the adaptation arc-shaped wheel (66) is in contact with the adaptation gear disc (63), the movable guide column (64) is located inside the movable guide groove (67) to move, the movable guide disc (65) is provided with two groups of penetrating and inserting columns in the frame body (1), and the two groups of penetrating and inserting columns are fixedly connected with the first adaptation disc (651) and the second adaptation disc (652) respectively.

3. The screening device for plastic particle production according to claim 1, wherein the dust prevention mechanism comprises two sets of dust baffles (21), a feeding groove (22) is formed in the feeding hopper (2), a central plate (23) is arranged at the upper end of the middle in the feeding groove (22), notches for mounting the dust baffles (21) are formed in two sides of the inner part of the central plate (23), and movable bearings are rotatably arranged between the dust baffles (21) and the notches;

put down pole (25) in the middle of the department of well putting board (23) lower extreme, pan feeding groove (22) both sides border department all is provided with side position piece (24), and side position piece (24) block dust board (21), fixedly connected with conflict spring (26) between dust board (21) and the lower pole (25) of putting.

4. The screening device for plastic particle production according to claim 1, wherein a slag storage plate (8) is arranged at the front end of the frame body (1), a material storage area inside the slag storage plate (8) is located in the middle position inside the frame body (1), side oblique rods (14) are arranged on two sides above the slag storage plate (8) in the frame body (1), a second screen (141) is arranged between the two sets of side oblique rods (14), and the second screen (141) is used for secondary screening of plastic particles.

5. The screening device for plastic particle production according to claim 4, wherein cleaning sliding grooves (142) are formed in the lower end faces of the side inclined rods (14), a cleaning sliding member (143) is arranged between every two adjacent cleaning sliding grooves (142) in a sliding mode, an elastic rope (82) is arranged at one end inside the slag storage plate (8), the elastic rope (82) is fixedly connected with the cleaning sliding member (143), the upper end face of the cleaning sliding member (143) is a conical surface, and the conical surface is abutted to the second screen (141).

6. A screening device for plastic particle production according to claim 4, wherein a built-in movable groove is formed at the bottom end inside the slag storage plate (8), a built-in movable slag discharging plate (81) is slidably arranged inside the built-in movable groove, the built-in movable slag discharging plate (81) moves to the outer end, the slag storage plate (8) is hollow, and the built-in movable slag discharging plate (81) is used for discharging slag inside the slag storage plate (8).

7. The screening device for plastic particle production according to claim 1, wherein discharge grooves (16) are formed in the frame body (1) at two sides of the guide inclined rod (17), and a slag discharge groove (15) is formed in the middle of the bottom of the frame body (1);

and the front end face and the rear end face of the frame body (1) are provided with discharge plates (3) corresponding to the discharge grooves (16).