CN113601755A

CN113601755A - Waste plastic's sorting separation device

Info

Publication number: CN113601755A
Application number: CN202110898346.8A
Authority: CN
Inventors: 段伟; 段朋朋; 段志豪
Original assignee: Jieshou Yunfeng Renewable Resources Co ltd
Current assignee: Jieshou Yunfeng Renewable Resources Co ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2021-11-05

Abstract

The invention relates to a waste plastic sorting and separating device which comprises a first sorting chamber, wherein a mixing mechanism for avoiding plastic product blockage is arranged at the inner bottom end of the first sorting chamber, a second sorting chamber is fixed at the outer bottom end of the first sorting chamber, two symmetrically-distributed discharge holes are formed between the second sorting chamber and the first sorting chamber, a separating mechanism for separating large-volume plastic products is arranged at the inner top end of the second sorting chamber, a material pushing mechanism for feeding is arranged on one side of the inner bottom end of the second sorting chamber, and a third sorting chamber for fully sorting the plastic products is arranged on one side of the outer part of the second sorting chamber. According to the invention, the sorting and separation of the waste plastics are more sufficient by arranging the first sorting chamber, the second sorting chamber, the third sorting chamber and the like, and meanwhile, the matching among the sorting chambers is very tight, the working continuity is high, and the sorting efficiency is improved.

Description

Waste plastic's sorting separation device

Technical Field

The invention relates to the technical field of sorting devices, in particular to a sorting and separating device for waste plastics.

Background

Waste plastics are a popular term and do not refer to waste, old and useless plastic products. Most plastic products, especially a large number of disposable plastic products, have the properties of the plastic material which are not greatly changed after being used, so that the plastic products can be completely recycled and reprocessed into the plastic products by a proper method for reuse.

There often exist not of uniform size, the plastic products of light weight difference in waste plastic, need use when retrieving waste plastic and select separately separator, current select separately separator often selects separately efficiency when using is not high, and the effect of selecting separately simultaneously is not good for waste plastic products's selection is not abundant, influences follow-up recovery and processing to plastic products, reduces recovery efficiency and quality.

In order to solve the above-mentioned drawbacks, a technical solution is now provided.

Disclosure of Invention

The invention aims to provide a waste plastic sorting and separating device.

The technical problems to be solved by the invention are as follows:

there often is not uniform in size in waste plastic, and the plastic products of light weight difference need use when retrieving waste plastic and select separately separator, and current select separately separator often selects separately efficiency when using is not high, and the effect of selecting separately simultaneously is not good for waste plastic products's selection is not abundant, influences follow-up recovery and processing to plastic products, reduces recovery efficiency and quality.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides a sorting and separating device of waste plastic, includes first sorting chamber, the inside bottom of first sorting chamber is equipped with the mixing mechanism who avoids plastic products to block up, and the outside bottom mounting of first sorting chamber has the second to select separately the room, sets up the discharge gate of two symmetric distributions between second sorting chamber and the first sorting chamber, and the inside top of second sorting chamber is equipped with the separating mechanism who is used for separating bulky plastic products, and inside bottom one side of second sorting chamber is equipped with the pushing equipment who is used for the material loading, and outside one side of second sorting chamber is equipped with the third sorting chamber that is used for fully sorting plastic products.

Furthermore, the top of the first sorting chamber is provided with a feeding hole, a material receiving chamber is fixed on one side wall of the outer part of the first sorting chamber, and an air blower is fixed on one side wall of the inner part of the first sorting chamber.

Further, mixing mechanism includes the mixing chamber of fixing with the inside bottom of first branch selection room, and the inside top of mixing chamber is fixed with the thread bush, and the inside of thread bush is run through and is equipped with the threaded rod, threaded rod and thread bush threaded connection, and the top of threaded rod is passed the mixing chamber and is rotated with the mixing chamber and be connected.

Further, the outer fixed surface in top of threaded rod has a plurality of evenly distributed's mixing vane, and the bottom mounting of threaded rod has the removal spur gear, and the inside bottom mounting of mixing chamber has hybrid motor, and hybrid motor's output is fixed with the initiative spur gear, is equipped with the dwang between hybrid motor and the threaded rod.

Furthermore, the both ends of dwang are rotated with the inside top and the bottom of mixing chamber respectively and are connected, and the surface top of dwang is fixed with driven spur gear, and driven spur gear meshes with the initiative spur gear mutually, and the surface bottom of dwang is fixed with fixed spur gear, and the length of fixed spur gear is greater than the length of removal spur gear, and fixed spur gear meshes with the removal spur gear mutually.

Furthermore, the separating mechanism comprises a separating plate which is connected with the inner wall of the second separating chamber in a sliding mode, and a screen is fixed on the inner surface of the separating plate.

Furthermore, a discharging channel is fixed on one side of the outer part of the second sorting chamber.

Furthermore, the third sorting chamber is obliquely arranged, conveying tables are fixed on two sides of the inside of the third sorting chamber, and conveying belts are installed on the outer sides of the conveying tables.

Furthermore, the inside one end of third sorting chamber is fixed with the receipts feed cylinder, receives the feed cylinder and is located discharging channel under, and conveyer's surface mounting has a plurality of evenly distributed's the flitch of getting, and the internal surface of getting the flitch is equipped with a plurality of evenly distributed's sieve mesh, and the one end below of third sorting chamber is equipped with and is used for carrying out the storage compartment of collecting to plastic products.

The invention has the beneficial effects that:

according to the invention, the sorting and separation of the waste plastics are more sufficient by arranging the sorting chambers such as the first sorting chamber, the second sorting chamber and the third sorting chamber, meanwhile, the matching among the sorting chambers is very tight, the working continuity is high, and the sorting efficiency is improved;

plastic products such as plastic bags with smaller mass in the waste plastics falling into the first sorting chamber are blown into the material receiving chamber through the air blower, so that the first sorting is completed, and the subsequent sorting is facilitated;

through setting up mixing mechanism for fixed straight-teeth gear on the hybrid motor drive dwang rotates, thereby the drive rotates with its meshed removal straight-teeth gear, and then drives the mixing vane rotation on the threaded rod, mixes waste plastic, avoids the plastic products of bulky to cause the jam of discharge gate, and through the threaded connection of thread bush and threaded rod, the mixing vane that drives on the threaded rod moves in vertical direction simultaneously, improves mixing mechanism's mixing efficiency.

Through the arrangement of the separating mechanism, the separating motor drives the eccentric wheel to do eccentric motion, so that the lifting rod is driven to move upwards in the vertical direction, the lifting rod is driven to do reciprocating motion in the vertical direction by matching with the gravity of the return spring and the separating plate, the screen on the separating plate does reciprocating motion, waste plastics are screened, and therefore large-volume plastic products are separated, the separating effect is good, and the separating efficiency is improved;

through setting up pushing equipment, make to push away the material cylinder and promote first slide bar and slide in pushing away the material base, the cooperation second slide bar slides in the scraping wings, make the contained angle between head rod and the second connecting rod change, thereby make the scraping wings and push away the distance between the material base and produce the change, it promotes waste plastic to drive the scraping wings to slide in the second sorting room, make waste plastic fall into in the third sorting room from discharging channel, avoid piling up too much waste plastic in the second sorting room, influence sorting efficiency and quality.

Through setting up the third and sorting the room for the motion of transportation motor drive conveyer, thereby make get the flitch and move to the material collecting barrel in, and get the material through getting the sieve mesh in the flitch to not unidimensional plastic products, drop when getting the flitch that is equipped with plastic products and remove to conveyer's the other end and collect in the storage chamber, thereby sieve out not equidimensional plastic products, sieve more fully.

Drawings

The invention is described in further detail below with reference to the figures and specific embodiments.

FIG. 1 is a schematic view showing the overall structure of a waste plastic sorting and separating apparatus according to the present invention;

FIG. 2 is a schematic view of the internal structure of a first sorting chamber according to the present invention;

FIG. 3 is a schematic structural view of the mixing mechanism of the present invention;

FIG. 4 is a schematic view of the internal structure of a second sorting chamber according to the present invention;

FIG. 5 is an enlarged view of the invention at A in FIG. 4;

FIG. 6 is a top view of a separator plate according to the present invention;

FIG. 7 is a top view of the pusher mechanism of the present invention;

FIG. 8 is a schematic view showing the internal structure of a third separation chamber according to the present invention;

fig. 9 is a schematic structural diagram of the material taking plate of the invention.

In the figure: 1. a first sorting chamber; 2. a mixing mechanism; 3. a second sorting chamber; 4. a separating mechanism; 5. a material pushing mechanism; 6. a third sorting chamber; 101. a feed inlet; 102. a material receiving chamber; 103. a blower; 201. a mixing chamber; 202. a threaded sleeve; 203. a threaded rod; 204. a mixing blade; 205. moving a spur gear; 206. a hybrid motor; 207. a driving spur gear; 208. rotating the rod; 209. a driven spur gear; 210. fixing a straight gear; 401. a separation plate; 402. screening a screen; 403. a first fixed seat; 404. a return spring; 405. a second fixed seat; 406. a lifting rod; 407. a pulley; 408. separating the motor; 409. an eccentric wheel; 501. a material pushing base; 502. a material pushing plate; 503. a first connecting rod; 504. a second connecting rod; 505. a first slide bar; 506. a first fixing lever; 507. a second slide bar; 508. a second fixing bar; 509. a material pushing cylinder; 510. a discharge channel; 601. a transport table; 602. a transport motor; 603. a conveyor belt; 604. a material collecting barrel; 605. taking a material plate; 606. and (4) screening holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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. 1-9, the present invention provides a technical solution:

a sorting and separating device for waste plastics comprises a first sorting chamber 1, wherein a mixing mechanism 2 for avoiding plastic products from being blocked is arranged at the bottom end inside the first sorting chamber 1, a second sorting chamber 3 is fixed at the bottom end outside the first sorting chamber 1, two symmetrically-distributed discharge ports are formed between the second sorting chamber 3 and the first sorting chamber 1, a separating mechanism 4 for separating large-volume plastic products is arranged at the top end inside the second sorting chamber 3, a material pushing mechanism 5 for feeding is arranged on one side of the bottom end inside the second sorting chamber 3, and a third sorting chamber 6 for fully sorting the plastic products is arranged on one side outside the second sorting chamber 3;

a feeding hole 101 is formed in the top of the first sorting chamber 1, a material receiving chamber 102 is fixed on one side wall of the outer portion of the first sorting chamber 1, the material receiving chamber 102 is communicated with the first sorting chamber 1, an air blower 103 is fixed on one side wall of the inner portion of the first sorting chamber 1, plastic products such as plastic bags with small mass and the like falling into the waste plastics in the first sorting chamber 1 are blown into the material receiving chamber 102 through the air blower 103, primary sorting is completed, and subsequent sorting is facilitated;

the mixing mechanism 2 comprises a mixing chamber 201 fixed with the bottom end of the interior of the first sorting chamber 1, a threaded sleeve 202 is fixed on the top end of the interior of the mixing chamber 201, a threaded rod 203 penetrates through the interior of the threaded sleeve 202, the threaded rod 203 is in threaded connection with the threaded sleeve 202, and the top end of the threaded rod 203 penetrates through the mixing chamber 201 and is in rotary connection with the mixing chamber 201;

a plurality of uniformly distributed mixing blades 204 are fixed on the outer surface of the top end of the threaded rod 203, a moving spur gear 205 is fixed at the bottom end of the threaded rod 203, a mixing motor 206 is fixed at the bottom end of the interior of the mixing chamber 201, a driving spur gear 207 is fixed at the output end of the mixing motor 206, and a rotating rod 208 is arranged between the mixing motor 206 and the threaded rod 203;

the two ends of the rotating rod 208 are respectively rotatably connected with the top end and the bottom end of the interior of the mixing chamber 201, a driven spur gear 209 is fixed at the top end of the outer surface of the rotating rod 208, the driven spur gear 209 is meshed with the driving spur gear 207, a fixed spur gear 210 is fixed at the bottom end of the outer surface of the rotating rod 208, the length of the fixed spur gear 210 is larger than that of the movable spur gear 205, and the fixed spur gear 210 is meshed with the movable spur gear 205. Through setting up mixing mechanism 2, make fixed spur gear 210 on the hybrid motor 206 drive dwang 208 rotate, thereby the drive rotates with its meshed removal spur gear 205, and then drive mixing vane 204 on the threaded rod 203 and rotate, mix waste plastic, avoid bulky plastic products to cause the jam of discharge gate, simultaneously through the threaded connection of thread bush 202 with threaded rod 203, drive mixing vane 204 on the threaded rod 203 and remove in vertical direction, improve mixing mechanism 2's mixing efficiency.

The separating mechanism 4 comprises a separating plate 401 which is in sliding connection with the inner wall of the second separation chamber 3, a screen 402 is fixed on the inner surface of the separating plate 401, first fixing seats 403 which are symmetrically distributed and fixed with the inner wall of the second separation chamber 3 are arranged above the two ends of the separating plate 401, a return spring 404 is fixed between the bottom of the first fixing seat 403 and the top of the separating plate 401, and second fixing seats 405 which are symmetrically distributed and fixed with the inner wall of the second separation chamber 3 are arranged below the two ends of the separating plate 401;

the upper surface and the lower surface of the second fixing seat 405 are provided with a lifting rod 406 in a penetrating manner, the top end of the lifting rod 406 is fixed with the bottom of the separation plate 401, the bottom end of the lifting rod 406 is provided with a pulley 407, two side walls of the outer part of the second sorting chamber 3 are fixed with symmetrically distributed separation motors 408, the output end of the separation motor 408 penetrates through the second sorting chamber 3 and is fixed with an eccentric wheel 409, and the top of the eccentric wheel 409 is abutted against the bottom of the pulley 407. Through the arrangement of the separation mechanism 4, the separation motor 408 drives the eccentric wheel 409 to do eccentric motion, so that the lifting rod 406 is driven to move upwards in the vertical direction, the lifting rod 406 does reciprocating motion in the vertical direction by matching with the gravity of the return spring 404 and the separation plate 401, the screen 402 on the separation plate 401 does reciprocating motion, waste plastics are screened, and then large-volume plastic products are separated, the separation effect is good, and the separation efficiency is improved;

the pushing mechanism 5 comprises a pushing base 501 fixed with the inner side wall of the second sorting chamber 3, a pushing plate 502 is arranged on one side of the pushing base 501 far away from the second sorting chamber 3, the bottom of the pushing plate 502 is connected with the inner bottom end of the second sorting chamber 3 in a sliding manner, first connecting rods 503 and second connecting rods 504 which are symmetrically distributed are arranged between the pushing base 501 and the top end and the bottom end of the pushing plate 502, and the first connecting rods 503 and the second connecting rods 504 which are positioned at the two ends are arranged in a crossed manner and are connected through hinges;

a first sliding rod 505 and a first fixing rod 506 are respectively arranged at two ends inside the material pushing base 501, the first sliding rod 505 is connected with the material pushing base 501 in a sliding manner, the first fixing rod 506 is fixed with the material pushing base 501, a second sliding rod 507 and a second fixing rod 508 are respectively arranged at two ends inside the material pushing plate 502, the second sliding rod 507 is connected with the material pushing plate 502 in a sliding manner, and the second fixing rod 508 is fixed with the material pushing plate 502;

two ends of the first connecting rod 503 are rotatably connected to outer surfaces of the first sliding rod 505 and the second fixing rod 508, two ends of the second connecting rod 504 are rotatably connected to outer surfaces of the second sliding rod 507 and the first fixing rod 506, a pushing cylinder 509 is fixed to one side inside the pushing base 501, an output end of the pushing cylinder 509 is fixed to the outer surface of the first sliding rod 505, and a discharging channel 510 is fixed to one side outside the second sorting chamber 3. Through setting up pushing equipment 5 for push away material cylinder 509 and promote first slide bar 505 and slide in pushing away material base 501, cooperation second slide bar 507 slides in scraping wings 502, make the contained angle between head rod 503 and the second connecting rod 504 change, thereby make scraping wings 502 and push away the distance between the material base 501 and produce the change, drive scraping wings 502 and slide in second sorting chamber 3 and promote waste plastic, make waste plastic fall into third sorting chamber 6 from discharging channel 510, avoid piling up too much waste plastic in second sorting chamber 3, influence sorting efficiency and quality.

The third sorting chamber 6 is obliquely arranged, the two sides in the third sorting chamber 6 are fixedly provided with the transport platforms 601, one side of the third sorting chamber 6 is fixedly provided with the transport motor 602, the outer side of the transport platform 601 is provided with the conveying belt 603, the output end of the transport motor 602 is fixedly provided with the third driving column, and the third driving column is rotatably connected with the inner surface of the conveying belt 603;

a material receiving cylinder 604 is fixed at one end inside the third sorting chamber 6, the material receiving cylinder 604 is located right below the discharge channel 510, a plurality of uniformly distributed material taking plates 605 are fixed on the outer surface of the conveying belt 603, a plurality of uniformly distributed sieve pores 606 are formed in the inner surface of each material taking plate 605, a material storage chamber for collecting plastic products is arranged below one end of the third sorting chamber 6, and the sizes of the sieve pores 606 in the plurality of material taking plates 605 are not completely the same, so that plastic products with different sizes are screened out, and screening is more sufficient;

through setting up third sorting chamber 6 for transportation motor 602 drive conveyer 603 moves, thereby makes get flitch 605 and move to in receiving material section of thick bamboo 604, and gets material through getting sieve mesh 606 in the flitch 605 to the plastic products of equidimension not, drops when getting flitch 605 that is equipped with plastic products and remove to conveyer 603 the other end and collect in the storage chamber, thereby sieves out the plastic products of equidimension not, sieves more fully.

The working principle is as follows:

when the sorting machine is used, waste plastics are firstly put into the first sorting chamber 1 from the feeding hole 101, plastic products such as plastic bags with smaller mass in the waste plastics falling into the first sorting chamber 1 are blown into the material receiving chamber 102 through the blower 103, and primary sorting is completed; start fixed spur gear 210 on the hybrid motor 206 drive dwang 208 and rotate to the drive rotates with its meshed removal spur gear 205, and then drives mixing vane 204 on the threaded rod 203 and rotates, simultaneously through the threaded connection of thread bush 202 with threaded rod 203, drives mixing vane 204 on the threaded rod 203 and moves in vertical direction, mixes waste plastic, avoids bulky plastic products to cause the jam of discharge gate.

Waste plastics enter the screen 402 in the second sorting chamber 3 from the discharge port, the separating motor 408 is started to drive the eccentric wheel 409 to do eccentric motion, the lifting rod 406 is driven to move upwards in the vertical direction by matching the abutting joint of the pulley 407 and the eccentric wheel 409, the lifting rod 406 is driven to do reciprocating motion in the vertical direction by matching the gravity of the return spring 404 and the separating plate 401, the screen 402 on the separating plate 401 does reciprocating motion, and the waste plastics are screened so as to separate large-volume plastic products;

the material pushing cylinder 509 is started to push the first sliding rod 505 to slide in the material pushing base 501, and the second sliding rod 507 is matched to slide in the material pushing plate 502, so that the included angle between the first connecting rod 503 and the second connecting rod 504 is changed, the distance between the material pushing plate 502 and the material pushing base 501 is changed, the material pushing plate 502 is driven to slide in the second sorting chamber 3 to push the waste plastics, and the waste plastics fall into the third sorting chamber 6 from the material discharging channel 510.

The conveying motor 602 is started to drive the conveying belt 603 to move, so that the material taking plate 605 moves into the material receiving barrel 604, plastic products with different sizes are taken through the sieve holes 606 in the material taking plate 605, and when the material taking plate 605 filled with the plastic products moves to the other end of the conveying belt 603, the plastic products fall into the material storing chamber to be collected, so that the plastic products with different sizes are screened.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation and a specific orientation configuration and operation, and thus, should not be construed as limiting the present invention. Furthermore, "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, or they may be connected through two or more elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims

1. The utility model provides a sorting and separating device of waste plastic, includes first sorting chamber (1), a serial communication port, the inside bottom of first sorting chamber (1) is equipped with mixing mechanism (2) of avoiding plastic products to block up, the outside bottom mounting of first sorting chamber (1) has second sorting chamber (3), set up two symmetric distribution's discharge gate between second sorting chamber (3) and first sorting chamber (1), the inside top of second sorting chamber (3) is equipped with separating mechanism (4) that are used for separating bulky plastic products, inside bottom one side of second sorting chamber (3) is equipped with pushing equipment (5) that are used for the material loading, outside one side of second sorting chamber (3) is equipped with and is used for fully sorting third sorting chamber (6) to plastic products.

2. The waste plastic sorting and separating device is characterized in that a feeding hole (101) is formed in the top of the first sorting chamber (1), a material receiving chamber (102) is fixed to one side wall of the outer portion of the first sorting chamber (1), and a blower (103) is fixed to one side wall of the inner portion of the first sorting chamber (1).

3. The waste plastic sorting and separating device is characterized in that the mixing mechanism (2) comprises a mixing chamber (201) fixed to the bottom end of the interior of the first sorting chamber (1), a threaded sleeve (202) is fixed to the top end of the interior of the mixing chamber (201), a threaded rod (203) penetrates through the interior of the threaded sleeve (202), the threaded rod (203) is in threaded connection with the threaded sleeve (202), and the top end of the threaded rod (203) penetrates through the mixing chamber (201) and is rotatably connected with the mixing chamber (201).

4. The waste plastic sorting and separating device is characterized in that a plurality of uniformly distributed mixing blades (204) are fixed on the outer surface of the top end of the threaded rod (203), a moving spur gear (205) is fixed at the bottom end of the threaded rod (203), a mixing motor (206) is fixed at the bottom end of the interior of the mixing chamber (201), a driving spur gear (207) is fixed at the output end of the mixing motor (206), and a rotating rod (208) is arranged between the mixing motor (206) and the threaded rod (203).

5. The waste plastic sorting and separating device is characterized in that two ends of the rotating rod (208) are rotatably connected with the top end and the bottom end of the inner part of the mixing chamber (201) respectively, a driven spur gear (209) is fixed at the top end of the outer surface of the rotating rod (208), the driven spur gear (209) is meshed with a driving spur gear (207), a fixed spur gear (210) is fixed at the bottom end of the outer surface of the rotating rod (208), the length of the fixed spur gear (210) is greater than that of the moving spur gear (205), and the fixed spur gear (210) is meshed with the moving spur gear (205).

6. The waste plastic sorting and separating device of claim 1, wherein the separating mechanism (4) comprises a separating plate (401) slidably connected with the inner wall of the second sorting chamber (3), and a screen (402) is fixed on the inner surface of the separating plate (401).

7. The sorting and separating device for waste plastics according to claim 1, characterized in that a discharge channel (510) is fixed to the outer side of the second sorting chamber (3).

8. The sorting and separating device for waste plastics according to claim 1, characterized in that the third sorting chamber (6) is arranged obliquely, a conveying table (601) is fixed on two sides of the inside of the third sorting chamber (6), and a conveying belt (603) is installed on the outer side of the conveying table (601).

9. The waste plastic sorting and separating device according to claim 7, wherein a material receiving barrel (604) is fixed at one end inside the third sorting chamber (6), the material receiving barrel (604) is located right below the discharging channel (510), a plurality of uniformly distributed material taking plates (605) are fixed on the outer surface of the conveying belt (603), a plurality of uniformly distributed sieve holes (606) are formed in the inner surface of each material taking plate (605), and a material storage chamber for collecting plastic products is arranged below one end of the third sorting chamber (6).