CN109176978B

CN109176978B - Plastic film recycling method

Info

Publication number: CN109176978B
Application number: CN201811051312.XA
Authority: CN
Inventors: 夏敏月
Original assignee: Suqian Ri Mao New Material Co ltd
Current assignee: Suqian RI Mao New Material Co.,Ltd.
Priority date: 2018-09-10
Filing date: 2018-09-10
Publication date: 2020-11-27
Anticipated expiration: 2038-09-10
Also published as: CN109176978A

Abstract

The invention relates to the technical field of plastic film recovery, in particular to a plastic film recovery method, which comprises the following steps; s1, firstly, putting the plastic film and the gravel into a stirrer for mixing and stirring, and grinding the plastic film into a sheet shape by using the gravel; s2, placing the mixture discharged in the S1 into screening equipment for screening, and separating the plastic film from the gravel; s3, putting the plastic film separated in the step S2 into cleaning equipment for cleaning, and removing dust on the plastic film; and S4, compressing and packaging the plastic film in the S3. The method utilizes the gravel to crush the plastic film, so that the size of the plastic film is uniform and consistent, and the plastic film is beneficial to recovery.

Description

Plastic film recycling method

Technical Field

The invention relates to the technical field of plastic film recovery, in particular to a plastic film recovery method.

Background

The waste materials produced in the production process of the paper mill contain a large amount of plastic films, impurities such as gravels except the plastic films, iron wires and iron nails for cartons in the waste materials are removed through the plastic film winnowing machine for the paper mill, the plastic films belong to renewable energy sources and have recycling value, so that the recycling efficiency of the plastic films is improved, secondary treatment caused by contact with a water source is avoided, and the operation intensity of workers is reduced.

Then, in the existing plastic film recycling process, the recycling difficulty of the plastic film is often larger and the recycling efficiency is lower due to different sales of the plastic film.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a plastic film recovery method, which is characterized in that a plastic film is crushed by gravel, so that the size of the plastic film is uniform and consistent, and the recovery of the plastic film is facilitated.

The technical scheme adopted by the invention for solving the technical problems is as follows: a plastic film recycling method comprises the following steps;

s1, firstly, putting the plastic film and the gravel into a stirrer for mixing and stirring, and grinding the plastic film into a sheet shape by using the gravel;

s2, placing the mixture discharged in the S1 into screening equipment for screening, and separating the plastic film from the gravel;

s3, putting the plastic film separated in the step S2 into cleaning equipment for cleaning, and removing dust on the plastic film;

s4, compressing and packaging the plastic film in the S3;

the method comprises a first storage box, a shell, a junction box, a blanking hopper, an anti-blocking structure, a driving structure, a screening structure, a fan and a storage structure; the side wall of the shell is provided with the driving structure; the fan is fixed at one end of the shell, and the first containing box for containing a plastic film is fixed at the other end of the shell; the screening structure for air separation and the containing structure for containing gravel scraps are arranged in the shell, the containing structure is arranged at the bottom end of the screening structure, and the driving structure is connected to the screening structure and the containing structure; the top end of the shell is provided with the discharging hopper for storing plastic film garbage; the anti-blocking structure extending to the screening structure and used for preventing blocking is arranged in the discharging hopper; the top of shell is equipped with the junction box, just drive structure with the fan all with junction box electric connection.

Specifically, the driving structure comprises two driving wheels, a driving shaft, a belt, a motor and a cam, the motor is fixed on the housing, the motor is electrically connected with the junction box, the driving shaft is connected with the housing and the cam in a penetrating manner, the cam is rotatably connected with the housing through the driving shaft, the cam is abutted against the screening structure, the two driving wheels are respectively fixed on the motor and the driving shaft, and the belt is wound on the two driving wheels; when the during operation, the motor rotates, on the motor the drive wheel passes through on the drive shaft the drive wheel rotates, thereby makes the drive shaft rotates, the drive shaft drives the cam rotates, thereby the drive the screening structure with accomodate the structure shake, it is more convenient to select the reciprocal shake of structure and make and accomodate behind the plastic film selection by winnowing, effectively prevents simultaneously that plastic film from being in it is structural to select to pile up, drive structure drive accomodates the structure, effectively prevents the grit gathering accomodates structurally, and then improved the efficiency of accomodating of grit sweeps and quality.

Specifically, the screening structure comprises a screening plate, air holes, protrusions, a drainage channel, a connecting shaft and a first fixing sleeve, one end of the screening plate used for sorting gravel and plastic films is abutted to the cam, the first fixing sleeve is arranged at the bottom of the other end of the screening plate, the connecting shaft penetrates through the first fixing sleeve, the screening plate is rotatably connected with the shell through the connecting shaft, one end, away from the cam, of the screening plate is in a grid shape, the screening plate is in a wave-shaped structure, a plurality of rows and a plurality of columns of the protrusions are arranged on the screening plate, the air holes with an included angle of 30-60 degrees are arranged in the protrusions, and the drainage channel penetrates through the connecting shaft and is communicated with the air holes; connecting the end part of the drainage channel with an air pipe, connecting the fan with a power supply, uniformly feeding the film scraps in the blanking hopper onto the screening plate, the fan blows the film to move the film to one end of the first containing box, so that the gravel enters the containing structure through the screening plate, meanwhile, the cam drives the screening plate to rotate around the connecting shaft, so that the plastic film moves towards one end of the first containing box, meanwhile, the internal gas of the air holes blows the plastic film, so that the separation effect of the plastic film and gravel is better, the distance of a winnowing channel is prolonged, the contact time with air is enhanced, meanwhile, the screening plate is of a wave-shaped structure, the screening area is increased, and then improved screening efficiency and quality, the reciprocal shake of screening board effectively prevents the jam of screening board makes plastic film accomodate more conveniently simultaneously.

Specifically, the accommodating structure comprises an accommodating sleeve, a second accommodating box, a baffle, a second fixing sleeve and a guide shaft, the second accommodating box and the first accommodating box are symmetrically arranged at the end part of the shell, the accommodating sleeve is arranged at the bottom end of the screening plate, one end of the accommodating sleeve, which is close to the cam, is provided with a groove with an arc structure, the accommodating sleeve is abutted against the cam, the bottom end of the accommodating sleeve, which is close to one end of the cam, is provided with the baffle, the other end of the accommodating sleeve extends to the second accommodating box, one end of the accommodating sleeve, which is close to the second accommodating box, is fixedly provided with the second fixing sleeve, the guide shaft is connected with the shell and the second fixing sleeve in a penetrating manner, and the accommodating sleeve is rotatably connected with the shell through the guide shaft; the cam is contradicted it makes to accomodate the cover and wind the guiding axle rotates, works as the cam with when accomodating the cover and not contradicting, accomodate the cover and wind under the circumstances of dead weight the guiding axle rotates, makes accomodate the cover with the baffle is contradicted, and then the drive accomodate the reciprocal rotation of cover, make the follow the screening board screening is gone into gravel in the accomodate cover gets into the inside of second containing box, effectually prevents accomodate the cover jam, it is more convenient to make the gravel clearance accomodate for the effect of selection by winnowing is better.

Specifically, the anti-blocking structure comprises a plurality of driving rods, a transmission block and two supporting plates, the two supporting plates are symmetrically arranged on the side wall of the screening plate, the transmission block for opening and closing the discharging hopper is arranged at the end parts of the two supporting plates, one end of the transmission block, which is far away from the screening plate, is of an arc structure with the connecting shaft as the center of a circle, the driving rods which are linearly distributed are arranged at the end parts of the transmission block, and the end parts of the driving rods are of a hemispherical structure; the screening board shakes and drives the backup pad rotates, the backup pad drives the transmission piece with sliding connection between the hopper down, thereby control opening and close of hopper down, simultaneously the actuating lever is in the inside of hopper removes down, effectually prevents that plastic film and gravel are in the inside of hopper is blockked up down, makes down the hopper unloading more even, and then has improved the selection by winnowing quality.

The invention has the beneficial effects that:

(1) the method utilizes the gravel to crush the plastic film, so that the size of the plastic film is uniform and consistent, and the plastic film is beneficial to recovery.

(2) The driving structure of the screening equipment adopted by the method is matched with the screening structure, so that the screening structure is vibrated in a reciprocating manner, and meanwhile, the fan is matched with the screening device, so that the screening distance is prolonged, the contact area with the papermaking waste is increased, and the screening quality and the screening efficiency are improved. The reciprocating shaking of the screening structure of the screening equipment adopted by the method enables the plastic film to be stored more conveniently after being winnowed, meanwhile, the plastic film is effectively prevented from being stacked on the screening structure, the driving structure drives the storage structure, gravel is effectively prevented from being accumulated on the storage structure, and the storage efficiency and the quality of gravel scraps are improved. According to the method, the anti-blocking structure is fixed at the end part of the screening structure of the screening equipment and is arranged in the blanking hopper, so that the discharging speed of materials in the blanking hopper can be controlled conveniently, the blanking hopper can be prevented from being blocked effectively, and the quality of winnowing is improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural diagram of a screening apparatus used in the method;

FIG. 2 is a schematic view of the connection of the housing and the screening structure of FIG. 1;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an enlarged view of the portion B shown in FIG. 2;

fig. 5 is a schematic structural view of the anti-blocking structure shown in fig. 2.

In the figure: 1. first containing box, 2, shell, 3, junction box, 4, lower hopper, 5, prevent stifled structure, 51, actuating lever, 52, transmission piece, 53, backup pad, 6, drive structure, 61, drive wheel, 62, drive shaft, 63, belt, 64, motor, 65, cam, 7, screening structure, 71, screening board, 72, gas pocket, 73, arch, 74, drainage channel, 75, connecting axle, 76, first fixed cover, 8, fan, 9, containing structure, 91, containing cover, 92, second containing box, 93, baffle, 94, the fixed cover of second, 95, the guiding axle.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1, 2 and 3, the recycling method of plastic film according to the present invention comprises the following steps;

s4, compressing and packaging the plastic film in the S3;

the method comprises a first storage box 1, a shell 2, a junction box 3, a blanking hopper 4, an anti-blocking structure 5, a driving structure 6, a screening structure 7, a fan 8 and a storage structure 9; the side wall of the shell 2 is provided with the driving structure 6; the fan 8 is fixed at one end of the shell 2, and the first containing box 1 for containing a plastic film is fixed at the other end of the shell 2; the screening structure 7 for air separation and the containing structure 9 for containing gravel scraps are arranged in the shell 2, the containing structure 9 is arranged at the bottom end of the screening structure 7, and the driving structure 6 is connected to the screening structure 7 and the containing structure 9; the top end of the shell 2 is provided with the discharge hopper 4 for storing plastic film garbage; the anti-blocking structure 5 extending to the screening structure 7 and used for preventing blocking is arranged in the discharging hopper 4; the top of shell 2 is equipped with junction box 3, just drive structure 6 with fan 8 all with junction box 3 electric connection.

Specifically, as shown in fig. 1, fig. 2 and fig. 3, in the recycling method of plastic film according to the present invention, the driving structure 6 includes two driving wheels 61, a driving shaft 62, a belt 63, a motor 64 and a cam 65, the motor 64 is fixed to the housing 2, the motor 64 is electrically connected to the junction box 3, the driving shaft 62 is connected to the housing 2 and the cam 65 in a penetrating manner, the cam 65 is rotatably connected to the housing 2 through the driving shaft 62, the cam 65 abuts against the screening structure 7, the two driving wheels 61 are respectively fixed to the motor 64 and the driving shaft 62, and the belt 63 is wound around the two driving wheels 61; when the during operation, motor 64 rotates, drive wheel 61 on the motor 64 passes through on the drive shaft 62 drive wheel 61 rotates, thereby makes drive shaft 62 rotates, drive shaft 62 drives cam 65 rotates, thereby the drive screening structure 7 with accomodate the shake of structure 9, screening structure 7 reciprocal shake makes and accomodate more conveniently after the plastic film selection by winnowing, effectively prevents simultaneously that plastic film from being in pile up on the screening structure 7, drive structure 6 drive accomodate the structure 9, prevent effectively that the grit from gathering in accomodate on the structure 9, and then improved the efficiency of accomodating of grit sweeps and quality thereof.

Specifically, as shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the plastic film recycling method according to the present invention includes a screening plate 71, air holes 72, protrusions 73, a drainage channel 74, a connecting shaft 75 and a first fixing sleeve 76, wherein one end of the screening plate 71 for separating gravel and plastic film is abutted against the cam 65, the first fixing sleeve 76 is disposed at the bottom end of the other end of the screening plate 71, the connecting shaft 75 penetrates through the first fixing sleeve 76, the screening plate 71 is rotatably connected with the housing 2 through the connecting shaft 75, one end of the screening plate 71 away from the cam 65 is in a grid shape, the screening plate 71 is in a wave-shaped structure, a plurality of rows and a plurality of rows of the protrusions 73 are disposed on the screening plate 71, the air holes 72 having an included angle of 30 to 60 degrees with the screening plate 71 are disposed inside the protrusions 73, the drainage channel 74 penetrates through the connecting shaft 75 and is communicated with the air hole 72; will the end connection trachea of drainage channel 74, fan 8 switch on, the even entering of film sweeps of hopper 4's inside down on the screening plate 71, fan 8 blows the film, makes the film toward the one end of first containing box 1 removes, makes the grit process the screening plate 71 gets into the inside of containing structure 9, simultaneously cam 65 drive the screening plate 71 is around connecting axle 75 rotates, makes plastic film toward the one end of first containing box 1 removes, simultaneously the inside gas of gas pocket 72 blows plastic film, makes the separation effect of plastic film and grit better, has prolonged the distance of selection by winnowing passageway, has strengthened the contact time with the air, simultaneously the screening plate 71 is the wave structure, has increased the screening area, and then has improved screening efficiency and quality, screening plate 71 reciprocates and trembles, effectively prevent the jam of screening board 71, it is more convenient to make plastic film accomodate simultaneously.

Specifically, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, in the plastic film recycling method according to the present invention, the receiving structure 9 includes a receiving sleeve 91, a second receiving box 92, a baffle 93, a second fixing sleeve 94 and a guiding shaft 95, the second receiving box 92 and the first receiving box 1 are symmetrically disposed at an end portion of the housing 2, the receiving sleeve 91 is disposed at a bottom end of the sieving plate 71, one end of the receiving sleeve 91 close to the cam 65 is provided with a groove having an arc structure, the receiving sleeve 91 abuts against the cam 65, a bottom end of one end of the receiving sleeve 91 close to the cam 65 is provided with the baffle 93, the other end of the receiving sleeve 91 extends to the second receiving box 92, one end of the receiving sleeve 91 close to the second receiving box 92 is fixed with the second fixing sleeve 94, the guiding shaft 95 is penetratingly connected to the housing 2 and the second fixing sleeve 94, the receiving sleeve 91 is rotatably connected with the housing 2 through the guide shaft 95; cam 65 is contradicted it makes to accomodate cover 91 winds guiding axle 95 rotates, works as cam 65 with when accomodating cover 91 is not contradicted, accomodate cover 91 and wind under the circumstances of dead weight guiding axle 95 rotates, makes accomodate cover 91 with baffle 93 is contradicted, and then the drive accomodate cover 91 reciprocal rotation, make the follow screening board 71 filters into the grit in accomodating cover 91 gets into the inside of second containing box 92, effectually prevents accomodate cover 91 jam, makes the grit clearance accomodate more convenient for the effect of selection by winnowing is better.

Specifically, as shown in fig. 1, fig. 2 and fig. 5, in the plastic film recycling method, the anti-blocking structure 5 includes a plurality of driving rods 51, a driving block 52 and two supporting plates 53, the two supporting plates 53 are symmetrically arranged on the side wall of the screening plate 71, the driving blocks 52 for opening and closing the blanking hopper 4 are arranged at the end portions of the two supporting plates 53, one end of the driving block 52, which is far away from the screening plate 71, is an arc structure with the connecting shaft 75 as a circle center, the driving rods 51 which are linearly distributed are arranged at the end portions of the driving blocks 52, and the end portions of the driving rods 51 are of a hemispherical structure; screening board 71 shake and drive backup pad 53 rotates, backup pad 53 drives transmission piece 52 with sliding connection between hopper 4 down, thereby control the opening and close of hopper 4 down, simultaneously actuating lever 51 is in the inside of hopper 4 removes down, and the effectual plastic film and gravel that prevents are in the inside of hopper 4 is blockked up down, makes down hopper 4 unloading is more even, and then has improved the selection by winnowing quality.

Firstly, a driving structure 6 and a fan 8 are connected to an external power line, plastic film garbage of a paper mill is stored in a blanking hopper 4, the driving structure 6 drives a screening structure 7 to screen the plastic film garbage in cooperation with the fan 8, so that the plastic film is stored in a first storage box 1, the storage structure 9 shakes to store gravel in the storage structure 9, and meanwhile the screening structure 7 drives an anti-blocking structure 5 to control the discharge speed of the plastic garbage in the blanking hopper 4; the method specifically comprises the following steps:

(1) when the pneumatic plastic film winnowing machine works, the motor 64 rotates, the driving wheel 61 on the motor 64 rotates through the driving wheel 61 on the driving shaft 62, so that the driving shaft 62 rotates, the driving shaft 62 drives the cam 65 to rotate, so that the screening structure 7 and the accommodating structure 9 are driven to shake, the screening structure 7 shakes in a reciprocating mode, so that the plastic films can be accommodated conveniently after being winnowed, meanwhile, the plastic films are effectively prevented from being stacked on the screening structure 7, the accommodating structure 9 is driven by the driving structure 6, gravel is effectively prevented from being accumulated on the accommodating structure 9, and accordingly, the accommodating efficiency and the quality of gravel scraps are improved;

(2) the screening plate 71 shakes to drive the supporting plate 53 to rotate, the supporting plate 53 drives the transmission block 52 to be in sliding connection with the blanking hopper 4, so that the blanking hopper 4 is controlled to be opened and closed, meanwhile, the driving rod 51 moves in the blanking hopper 4, plastic films and gravel are effectively prevented from being blocked in the blanking hopper 4, blanking of the blanking hopper 4 is more uniform, and the winnowing quality is improved;

(3) the end part of the drainage channel 74 is connected with an air pipe, the fan 8 is powered on, the film scraps in the discharging hopper 4 uniformly enter the screening plate 71, the fan 8 blows the film to enable the film to move towards one end of the first containing box 1, the gravel enters the containing structure 9 through the screening plate 71, meanwhile, the cam 65 drives the screening plate 71 to rotate around the connecting shaft 75, so that the plastic film moves towards one end of the first containing box 1, meanwhile, the internal gas of the air hole 72 blows the plastic film, so that the separation effect of the plastic film and gravel is better, the distance of a winnowing channel is prolonged, the contact time with air is enhanced, meanwhile, the screening plate 71 is of a wave-shaped structure, the screening area is increased, the screening efficiency and the quality are further improved, the screening plate 71 shakes in a reciprocating manner, the blocking of the screening plate 71 is effectively prevented, and meanwhile, the plastic film is more convenient to store;

(4) cam 65 conflicts and accomodates cover 91 and makes and accomodate cover 91 and rotate around guiding axle 95, when cam 65 and accomodate cover 91 do not conflict, accomodate cover 91 and rotate around guiding axle 95 under the circumstances of dead weight, make and accomodate cover 91 and baffle 93 conflict, and then drive and accomodate cover 91 reciprocating motion, make and get into the inside that accomodates cover 91 gravel entering second containing box 92 from the screening plate 71 screening, effectually prevent to accomodate cover 91 jam, it is more convenient to make the gravel clearance accomodate, make the effect of selection by winnowing better.

The driving structure 6 is matched with the screening structure 7 to enable the screening structure 7 to shake in a reciprocating mode, and is matched with the fan 8 to prolong the screening distance, increase the contact area with papermaking waste and improve the screening quality and efficiency; the reciprocating shaking of the screening structure 7 enables the plastic film to be stored more conveniently after winnowing, meanwhile, the plastic film is effectively prevented from being accumulated on the screening structure 7, the driving structure 6 drives the storage structure 9, gravel is effectively prevented from being accumulated on the storage structure 9, and the storage efficiency and the quality of gravel scraps are improved; screening structure 7's end fixing has prevents stifled structure 5, prevents stifled structure 5 and locates down the inside of hopper 4, is convenient for control down the discharge velocity of the inside material of hopper 4, effectively prevents to block up down hopper 4 simultaneously, has improved the quality of selection by winnowing.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A plastic film recycling method is characterized by comprising the following steps;

s4, compressing and packaging the plastic film in the S3;

the screening equipment adopted in the method comprises a first storage box (1), a shell (2), a junction box (3), a blanking hopper (4), an anti-blocking structure (5), a driving structure (6), a screening structure (7), a fan (8) and a storage structure (9); the side wall of the shell (2) is provided with the driving structure (6); the fan (8) is fixed at one end of the shell (2), and the first containing box (1) for containing a plastic film is fixed at the other end of the shell (2); the screening structure (7) used for air separation and the containing structure (9) used for containing gravel scraps are arranged in the shell (2), the containing structure (9) is arranged at the bottom end of the screening structure (7), and the driving structure (6) is connected to the screening structure (7) and the containing structure (9); the top end of the shell (2) is provided with the discharge hopper (4) for storing plastic film garbage; the anti-blocking structure (5) which extends to the screening structure (7) and is used for preventing blocking is arranged in the discharging hopper (4); the top end of the shell (2) is provided with the junction box (3), and the driving structure (6) and the fan (8) are both electrically connected with the junction box (3);

the driving structure (6) comprises two driving wheels (61), a driving shaft (62), a belt (63), a motor (64) and a cam (65), the motor (64) is fixed on the shell (2), the motor (64) is electrically connected with the junction box (3), the driving shaft (62) is connected with the shell (2) and the cam (65) in a penetrating mode, the cam (65) is connected with the shell (2) in a rotating mode through the driving shaft (62), the cam (65) is abutted to the screening structure (7), the two driving wheels (61) are respectively fixed on the motor (64) and the driving shaft (62), and the belt (63) is wound on the two driving wheels (61);

screening structure (7) is including screening board (71), gas pocket (72), arch (73), drainage channel (74), connecting axle (75) and first fixed cover (76) for select separately gravel and plastic film the one end of screening board (71) with cam (65) are contradicted, the bottom of the other one end of screening board (71) is equipped with first fixed cover (76), connecting axle (75) run through in first fixed cover (76), screening board (71) pass through connecting axle (75) with rotate between shell (2) and be connected, screening board (71) deviate from the one end of cam (65) is latticed, screening board (71) are the wave structure, be equipped with the multirow multiseriate on screening board (71) protruding (73), the inside of protruding (73) be equipped with contained angle is 30-60 between screening board (71) gas pocket (72), the drainage channel (74) penetrates through the connecting shaft (75) and is communicated with the air hole (72);

the accommodating structure (9) comprises an accommodating sleeve (91), a second accommodating box (92), a baffle (93), a second fixing sleeve (94) and a guide shaft (95), wherein the second accommodating box (92) and the first accommodating box (1) are symmetrically arranged at the end part of the shell (2), the accommodating sleeve (91) is arranged at the bottom end of the screening plate (71), one end, close to the cam (65), of the accommodating sleeve (91) is provided with a groove with an arc-shaped structure, the accommodating sleeve (91) is abutted to the cam (65), the bottom end, close to one end of the cam (65), of the accommodating sleeve (91) is provided with the baffle (93), the other end of the accommodating sleeve (91) extends to the second accommodating box (92), one end, close to the second accommodating box (92), of the accommodating sleeve (91) is fixed with the second fixing sleeve (94), and the guide shaft (95) is in penetrating connection with the shell (2) and the second fixing sleeve (94), the containing sleeve (91) is rotatably connected with the shell (2) through the guide shaft (95);

the anti-blocking structure (5) comprises a plurality of driving rods (51), transmission blocks (52) and two supporting plates (53), the two supporting plates (53) are symmetrically arranged on the side wall of the screening plate (71), the transmission blocks (52) used for opening and closing the blanking hopper (4) are arranged at the end parts of the two supporting plates (53), one end, away from the screening plate (71), of each transmission block (52) is of an arc structure with the connecting shaft (75) as the center of a circle, the driving rods (51) which are linearly distributed are arranged at the end parts of the transmission blocks (52), and the end parts of the driving rods (51) are of hemispherical structures;

during the use, at first, be connected to outside power cord with drive structure (6) and fan (8), the inside of hopper (4) under with the plastic film rubbish storage of paper mill, drive structure (6) drive screening structure (7) cooperation fan (8) screen the rubbish of plastic film, make the plastic film storage in the inside of first containing box (1), containing structure (9) shake with the grit storage in the inside of containing structure (9), screening structure (7) drive anti-blocking structure (5) control the discharge rate of the inside plastic rubbish of hopper (4) down simultaneously; the method specifically comprises the following steps: when the machine works, the motor (64) rotates, the driving wheel (61) on the motor (64) rotates through the driving wheel (61) on the driving shaft (62), so that the driving shaft (62) rotates, the driving shaft (62) drives the cam (65) to rotate, so that the screening structure (7) and the accommodating structure (9) are driven to shake, the screening structure (7) shakes in a reciprocating mode to enable the plastic film to be more conveniently accommodated after being winnowed, meanwhile, the plastic film is effectively prevented from being accumulated on the screening structure (7), the driving structure (6) drives the accommodating structure (9), gravel is effectively prevented from being accumulated on the accommodating structure (9), and the accommodating efficiency and the quality of gravel scraps are further improved; the screening plate (71) shakes to drive the supporting plate (53) to rotate, the supporting plate (53) drives the transmission block (52) to be in sliding connection with the blanking hopper (4), so that opening and closing of the blanking hopper (4) are controlled, meanwhile, the driving rod (51) moves in the blanking hopper (4), plastic films and gravel of the plastic films are effectively prevented from being blocked in the blanking hopper (4), blanking of the blanking hopper (4) is more uniform, and the winnowing quality is improved; the end part of a drainage channel (74) is connected with an air pipe, a fan (8) is powered on, film scraps in the blanking hopper (4) uniformly enter a screening plate (71), the fan (8) blows the film to enable the film to move towards one end of a first containing box (1) and enable gravels to enter the containing structure (9) through the screening plate (71), meanwhile, a cam (65) drives the screening plate (71) to rotate around a connecting shaft (75) to enable the plastic film to move towards one end of the first containing box (1), meanwhile, air in an air hole (72) blows the plastic film, the separation effect of the plastic film and the gravels is better, the distance of a winnowing channel is prolonged, the contact time of the plastic film and air is prolonged, meanwhile, the screening plate (71) is of a wave-shaped structure, the screening area is increased, the screening efficiency and the quality are further improved, and the screening plate (71) is shaken in a reciprocating manner, effectively preventing the screening plate (71) from being blocked and simultaneously enabling the plastic film to be more conveniently stored; cam (65) are contradicted and are accomodate cover (91) and make and accomodate cover (91) and rotate around guiding axle (95), when cam (65) and accomodate cover (91) do not contradict, accomodate cover (91) and rotate around guiding axle (95) under the circumstances of dead weight, make and accomodate cover (91) and baffle (93) conflict, and then drive and accomodate cover (91) reciprocal rotation, make and get into the inside that accomodates cover (91) gravel entering second containing box (92) from screening board (71) screening, effectually prevent to accomodate cover (91) jam, it is more convenient to make the grit clearance accomodate, make the effect of selection by winnowing better.