Dual-purpose shredder for plastics and paper

Abstract

The present application relates to the technical field of pulverizer, in particular to a dual-purpose pulverizer for plastics and paper, which comprises a plastic pulverizing box and a paper pulverizing box, two slide seats are symmetrically arranged on the vertical inner wall of the plastic pulverizing box, an inner groove is formed in the opposite inner surface of each slide seat, a plastic pulverizing cutter head driven by a driving source is rotatably installed in each inner groove, a plastic collecting drawer is arranged below the plastic pulverizing cutter head in the plastic pulverizing box, and a paper feeding port is formed in the top of the paper pulverizing box; compared with the prior art, the plastic pulverizing box and the paper pulverizing box are arranged to integrate the functions of plastic pulverizing and paper pulverizing, thus solving the problem of single function of the existing equipment and the problem that the existing equipment cannot meet the dual-purpose demand of public areas, realizing space saving and cost reduction, guiding the plastic to accurately enter the pulverizing cutter head by the slide seat and the inner groove, and completing the collection by the plastic collecting drawer.

Description

Technical Field

[0001] This invention relates to the field of shredder technology, specifically a dual-purpose shredder for plastics and paper. Background Technology

[0002] In public areas such as residential communities, office buildings, government service centers, and schools, a large amount of waste plastic products and confidential documents are generated daily. Shredding and collecting waste plastic products on-site can significantly reduce their volume, lowering the costs of subsequent transportation and recycling, and also helping to reduce plastic waste pollution. On the other hand, these locations also generate a large amount of paper documents that require regular shredding to protect personal privacy or business secrets.

[0003] However, existing shredding equipment has a relatively limited function, typically processing only one type of material: plastic or paper. Simultaneously configuring both plastic shredders and paper shredders not only occupies more public space but also increases procurement and maintenance costs, making it difficult to promote their use in limited public areas. Furthermore, traditional paper shredders present significant operational inconveniences in practice: their single-pass paper feed capacity is limited, and feeding too much paper at once can easily cause the shredder disc to jam or the motor to overload. Therefore, operators usually need to vertically feed a small amount of paper into the shredder inlet, wait for it to be completely shredded, and then manually feed the next batch. This process requires the operator to continuously monitor the equipment and repeatedly feed paper, failing to provide the convenience of automatic processing after placement. This is especially time-consuming, labor-intensive, and inefficient when processing large volumes of documents. Therefore, this invention proposes a dual-purpose shredder for both plastic and paper. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-purpose shredder for plastics and paper to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a dual-purpose plastic and paper shredder, comprising a plastic shredding box and a paper shredding box. Two sliding seats are symmetrically arranged on the vertical inner wall of the plastic shredding box. An inner groove is formed on the opposite inner surface of each sliding seat. A plastic shredding blade, driven by a drive source, is rotatably installed in each inner groove. A plastic collection drawer is provided inside the plastic shredding box below the plastic shredding blade. A paper inlet is formed on the top of the paper shredding box. Two paper shredding blades, driven by a drive source, are rotatably installed inside the paper shredding box. A paper collection drawer is provided inside the paper shredding box below the paper shredding blades. A paper feeder is fixedly installed on the upper surface of the paper shredding box above the paper inlet.

[0006] As a preferred technical solution of the present invention, the plastic crushing box is fixedly connected to one side of the paper shredder. A plastic feeding port is opened on the top of the side of the plastic crushing box away from the paper shredder. A feeding cover plate is movably hinged to the plastic feeding port, and a torsion spring is provided at the hinge position. One end of the torsion spring is fixedly connected to the feeding cover plate, and the other end of the torsion spring is fixedly connected to the plastic crushing box.

[0007] In a preferred embodiment of the present invention, both the plastic feeding port and the feeding cover are circular.

[0008] As a preferred technical solution of the present invention, the paper feeding seat includes a limiting piece located on one side above the paper input port and a second inclined seat located on the other side above the paper input port. The upper surface of the second inclined seat is an inclined surface, and a paper stacking frame is fixedly installed on the surface of the inclined surface. A paper temporary storage cavity is provided inside the paper stacking frame. A paper output port communicating with the paper temporary storage cavity is opened at the bottom position of the side of the paper stacking frame near the paper input port. A paper release port is opened on the other side of the paper stacking frame.

[0009] As a preferred technical solution of the present invention, a paper feed roller is provided between the paper input port and the shredder disc, and there are two paper feed rollers. A paper feeding channel is provided between the two paper feed rollers. The paper feeding channel is located below the paper input port. The limiting piece is arranged at an angle, and the bottom of the limiting piece is located above the paper feeding channel.

[0010] As a preferred technical solution of the present invention, a first inclined seat is fixedly installed on the upper surface of the shredder, the upper end of the limiting piece extends to the outside of the shredder and is fixedly connected to the surface of the first inclined seat, a limiting baffle is fixedly connected to the upper surface of the limiting piece, a limiting member is fixedly connected to the upper surface of the limiting baffle, and a guide opening is located on the same straight line as the limiting baffle between the limiting piece and the limiting member.

[0011] As a preferred technical solution of the present invention, a pressure plate is slidably installed on the inner surface of the paper stacking rack above the paper temporary placement cavity, a top plate is fixedly connected to the top of the paper stacking rack and arranged parallel to the pressure plate, the top plate and the pressure plate are movably connected by a spring, and a lifting member is fixedly connected to the upper surface of the pressure plate.

[0012] As a preferred technical solution of the present invention, a first paper feed roller, a second paper feed roller and a third paper feed roller driven by a drive source are rotatably mounted on the paper feed seat. The upper surface of the second inclined seat is provided with a wheel cavity for accommodating the first paper feed roller, and the paper stacking rack is provided with an opening on the side near the first paper feed roller. When paper is placed in the paper temporary placement cavity, the surface of the first paper feed roller is in contact with the lower surface of the bottommost paper.

[0013] As a preferred embodiment of the present invention, the second paper feed roller and the third paper feed roller are both disposed on the side of the second inclined seat near the paper inlet. When the paper is fed out from the paper outlet, the second paper feed roller and the third paper feed roller come into contact with the paper in sequence, and the rotation of the second paper feed roller and the third paper feed roller drives the paper to move towards the paper inlet.

[0014] As a preferred embodiment of the present invention, a horizontally arranged filter screen is fixedly installed at the bottom of the shredder. An exhaust fan is fixedly installed below the filter screen. An exhaust pipe is provided on one side of the exhaust fan, extending through to the outside of the shredder. An air inlet pipe is provided on the other side of the exhaust fan, located below the filter screen. A slide rail is provided on the upper surface of the filter screen, and rollers are slidably installed on the upper surface of the slide rail. The rollers are rotatably installed at the bottom of the shredder collection drawer.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This invention discloses a dual-purpose plastic and paper shredder. By incorporating a plastic shredding box and a paper shredding box, it integrates plastic shredding and paper shredding functions into one unit, solving the problem of existing equipment having limited functionality and being unable to meet the dual-use needs of public areas. This achieves space saving and cost reduction. The plastic is guided accurately into the shredding disc by a sliding base and an inner groove, and collected by a plastic collection drawer. Simultaneously, a paper feeder assists in paper positioning and continuous feeding, overcoming the shortcomings of traditional paper shredders that require continuous manual paper feeding and are inconvenient to operate. This achieves efficient, labor-saving, and automated shredding operations.

[0017] Other features and advantages of the present invention will be described in detail in the following specific embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the paper feeding seat of the present invention;

[0020] Figure 3 This is a schematic diagram showing the position and structure of the limiting member and the paper feed port of the present invention;

[0021] Figure 4 This is a side view of the paper stacking rack of the present invention;

[0022] Figure 5 This is a top view of the filter screen of the present invention.

[0023] In the diagram: 1. Plastic shredder box; 2. Sliding seat; 3. Inner groove; 4. Plastic shredder disc; 5. Plastic collection drawer; 6. Plastic feed inlet; 7. Shredder box; 8. Shredder disc; 9. Shredder collection drawer; 10. Paper inlet; 11. Paper feed seat; 12. Paper stacking rack; 13. First paper feed roller; 14. Second paper feed roller; 15. Limiting plate; 16. Feed roller; 17. Limiting baffle; 18. Limiting component; 181. Limiting part; 18 2. Arc-shaped section; 183. Guide section; 19. Guide port; 20. Paper outlet; 21. Top plate; 22. Pressing plate; 23. Spring; 24. Paper temporary storage chamber; 25. Through port; 26. Lifting component; 27. Third paper feed roller; 28. First inclined seat; 29. ​​Second inclined seat; 30. Wheel cavity; 31. Feeding cover plate; 32. Torsion spring; 33. Filter screen plate; 34. Exhaust fan; 35. Air inlet pipe; 36. Slide rail; 37. Roller; 38. Paper discharge port. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be noted that the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] Please see Figures 1-5In this embodiment, a dual-purpose plastic and paper shredder is provided, including a plastic shredder box 1 and a paper shredder box 7. Two sliding material seats 2 are symmetrically arranged on the vertical inner wall of the plastic shredder box 1. Each sliding material seat 2 has an inner groove 3 on its opposite inner surface. A plastic shredding disc 4, driven by a drive source, is rotatably installed in each inner groove 3. A plastic collection drawer 5 is located below the plastic shredding disc 4 inside the plastic shredder box 1. In use, the plastic shredder box 1 is used to process waste plastic products. The two symmetrically arranged sliding material seats 2 on its vertical inner wall guide the input plastic material downwards, ensuring it accurately enters the inner groove 3 on the opposite inner surface of the two sliding material seats 2. Each inner groove 3 has a rotatably installed plastic shredding disc 4 driven by a drive source. The two opposing rotating plastic shredding discs 4 can shear and crush the falling plastic material. The shredded plastic fragments fall into a plastic collection drawer 5 located below the plastic shredder disc 4 for easy collection and recycling. The top of the shredder 7 has a paper inlet 10. Inside the shredder 7, two shredder discs 8, driven by a drive source, are rotatably mounted. Below the shredder discs 8, a paper collection drawer 9 is located inside the shredder 7. A paper feeder 11 is fixedly installed on the upper surface of the shredder 7 above the paper inlet 10. The shredder 7 is used to process paper. After the paper enters through the paper inlet 10, it is shredded by the shredder discs 8, and the shredded paper scraps fall into the paper collection drawer 9 below. The paper feeder 11, fixedly installed on the upper surface of the shredder 7 above the paper inlet 10, assists in paper positioning and automatic feeding, thus achieving a dual shredding function for both plastic and paper.

[0028] In this embodiment, the plastic crushing box 1 is fixedly connected to one side of the paper shredder 7, forming an integrated structure that facilitates overall handling and placement. A plastic feeding port 6 is provided on the top of the side of the plastic crushing box 1 away from the paper shredder 7. A feeding cover plate 31 is movably hinged to the plastic feeding port 6, and a torsion spring 32 is provided at the hinge position. One end of the torsion spring 32 is fixedly connected to the feeding cover plate 31, and the other end is fixedly connected to the plastic crushing box 1. During use, the operator only needs to push open the feeding cover plate 31 to feed in plastic. After releasing, the elasticity of the torsion spring 32 will automatically reset and close the feeding cover plate 31, effectively preventing plastic fragments from splashing during the crushing process. It also prevents internal dust from leaking out, providing safety protection and maintaining environmental cleanliness. Both the plastic feeding port 6 and the feeding cover plate 31 are circular.

[0029] In this embodiment, the paper feed seat 11 includes a limiting piece 15 located on one side above the paper inlet 10 and a second inclined seat 29 located on the other side above the paper inlet 10. The upper surface of the second inclined seat 29 is an inclined surface, and a paper stacking rack 12 is fixedly installed on the inclined surface. The paper stacking rack 12 is provided with a paper temporary storage cavity 24 for batch stacking of paper to be shredded. A paper outlet 20 communicating with the paper temporary storage cavity 24 is opened at the bottom position of one side of the paper stacking rack 12 near the paper inlet 10. A paper release port 38 is opened on the other side of the paper stacking rack 12. In use, the operator can neatly put a stack of paper into the paper temporary storage cavity 24 through the paper release port 38. The inclined second inclined seat 29 allows the paper to naturally tilt towards the paper outlet 20 under the action of gravity, which facilitates the subsequent paper feeding mechanism to feed out the paper one by one from the bottom, thereby realizing continuous automatic feeding of paper without the need for the operator to manually feed in one sheet at a time.

[0030] In this embodiment, two feed rollers 16 are provided between the paper inlet 10 and the shredder discs 8. A paper feeding channel is provided between the two feed rollers 16, located below the paper inlet 10. A limiting plate 15 is inclined, with its bottom positioned above the paper feeding channel. In use, when paper is fed from the paper outlet 20 and enters the paper inlet 10, it is first guided by the limiting plate 15. The inclined limiting plate 15 ensures that the end of the paper is accurately guided into the paper feeding channel, preventing the paper from deviating or getting stuck outside the channel. Subsequently, the two relatively rotating feed rollers 16 clamp the paper and stably convey it downwards between the two shredder discs 8 for shredding. This ensures accurate and stable paper feeding throughout the entire process from infeeding to shredding. A first inclined seat 28 is fixedly installed on the upper surface of the shredder 7. The upper end of the limiting piece 15 extends to the outside of the shredder 7 and is fixedly connected to the surface of the first inclined seat 28. A limiting baffle 17 is fixedly connected to the upper surface of the limiting piece 15, and a limiting element 18 is fixedly connected to the upper surface of the limiting baffle 17. A guide opening 19, located on the same straight line as the limiting baffle 17, is provided between the limiting piece 15 and the limiting element 18. The limiting element 18 includes an arc-shaped portion 182 disposed within the paper inlet 10. A guide portion 183 is provided on one side of the arc-shaped portion 182. The guide portion 183 is located above the guide opening 19, and a limiting portion 181 is provided on the other side of the arc-shaped portion 182. During use, when the paper is fed in by the paper feed rollers, it first contacts the arc-shaped portion 182 of the limiting member 18, which guides the paper to bend downwards. As the paper continues to be fed in, it contacts and collides with the limiting piece 15, causing it to bend obliquely upwards and move upwards along the limiting piece 15 into the guide opening 19. When the upper end of the paper touches the limiting stop 17, its end is blocked and cannot move further upwards, while the rear part of the paper is still being pushed by the paper feed rollers, thus forcing the paper to fold at the paper input opening 10. The folded paper forms a downward-facing end, which, under the continuous pushing of the paper feed rollers, smoothly enters the paper feeding channel and is clamped and conveyed downwards by the feed roller 16. This structure effectively solves the problem of paper being too long to be aligned with the shredder inlet when it is fed in. Furthermore, the folded paper can be fed vertically downwards between the two feed rollers 16, thus simulating the state of manually holding the paper and feeding it vertically downwards into the paper inlet 10. This achieves the purpose of automatic and gradual feeding and shredding of the paper, eliminating the need for manual observation and repeated operation by the operator.

[0031] In this embodiment, a pressure plate 22 is slidably mounted on the inner surface of the paper stacking rack 12 above the paper temporary storage cavity 24. A top plate 21, arranged parallel to the pressure plate 22, is fixedly connected to the top of the paper stacking rack 12. The top plate 21 and the pressure plate 22 are movably connected by a spring 23. A lifting member 26 is fixedly connected to the upper surface of the pressure plate 22. The operator can lift the pressure plate 22 by pulling the lifting member 26 upward, and then put a stack of papers into the paper temporary storage cavity 24 through the paper outlet 38. After releasing the lifting member 26, the elastic force of the spring 23 will push the pressure plate 22 downward to press the paper. As the bottom paper is fed out one by one by the paper feed roller, the thickness of the paper stack decreases. The pressure plate 22 automatically descends under the action of the spring 23, always maintaining appropriate pressure on the remaining paper, ensuring that the bottom paper is always in close contact with the first paper feed roller 13, thereby ensuring stable and continuous paper feeding action and avoiding the situation of paper feeding idling or paper feeding failure due to the reduction of paper.

[0032] In this embodiment, a first paper feed roller 13, a second paper feed roller 14, and a third paper feed roller 27, driven by a drive source, are rotatably mounted on the paper feed seat 11. The upper surface of the second inclined seat 29 has a wheel cavity 30 for accommodating the first paper feed roller 13, and the paper stacking rack 12 has an opening 25 on the side near the first paper feed roller 13. When paper is placed in the paper temporary placement cavity 24, the surface of the first paper feed roller 13 is in contact with the lower surface of the lowest paper. Both the paper roller 14 and the third paper feed roller 27 are positioned on the side of the second inclined seat 29 near the paper input port 10. When paper is fed out from the paper output port 20, the second paper feed roller 14 and the third paper feed roller 27 sequentially contact the paper, and their rotation drives the paper towards the paper input port 10. When paper is placed in the paper storage chamber 24, the surface of the first paper feed roller 13 passes through the through-hole 25 and contacts the lower surface of the bottommost sheet of paper. In use, the first paper feed roller 13 rotates, using friction to push the bottommost sheet of paper from the paper output port 20 towards the paper input port 10. The paper then sequentially passes through the second paper feed roller 14 and the third paper feed roller 27, which in turn contact the paper and continue rotating, relaying the paper towards the paper input port 10. Through the coordinated action of the first, second, and third paper feeding rollers, individual sheets of paper are automatically and reliably separated from the paper pile and transported over long distances to the shredder inlet. The entire paper feeding process requires no manual intervention, greatly improving the continuity and convenience of the shredding operation.

[0033] In this embodiment, a horizontally arranged filter screen 33 is fixedly installed at the bottom of the shredder 7. An exhaust fan 34 is fixedly installed below the filter screen 33. An exhaust pipe is provided on one side of the exhaust fan 34, extending through to the outside of the shredder 7. An air inlet pipe 35 is provided on the other side of the exhaust fan 34, positioned below the filter screen 33. A slide rail 36 is provided on the upper surface of the filter screen 33, and rollers 37 are slidably installed on the upper surface of the slide rail 36. The rollers 37 are rotatably installed at the bottom of the shredder collection drawer 9. It should be noted that traditional shredders often retain a large amount of shredded paper inside. If this residue is not cleaned in time, it can lead to mold growth inside. Improper handling can severely damage the internal structure of the shredder and reduce its service life. Therefore, in this embodiment, after a period of use, maintenance personnel can pull out the shredder collection drawer 9, then seal the opening on one side of the shredder collection drawer 9 with a sealing plate, and then start the exhaust fan 34. The negative pressure is formed below the filter screen plate 33 through the air inlet pipe 35, which draws down the shredded paper scraps remaining inside the shredder box 7, or the fine paper scraps on the surface of the shredder blade 8. After being filtered by the filter screen plate 33, the paper scraps are blocked above the filter screen plate 33, making it convenient for people to clean. This can effectively reduce the residue or accumulation of paper scraps inside the shredder box 7, maintain the cleanliness of the paper scraps inside the shredder box 7, and improve its service life.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-purpose shredder for plastics and paper, characterized in that, The device includes a plastic shredder (1) and a paper shredder (7). Two sliding seats (2) are symmetrically arranged on the vertical inner wall of the plastic shredder (1). The inner surfaces of the two sliding seats (2) on opposite sides are provided with inner grooves (3). Each inner groove (3) is rotatably installed with a plastic shredder disc (4) driven by a drive source. A plastic collection drawer (5) is provided inside the plastic shredder (1) below the plastic shredder disc (4). A paper inlet (10) is provided on the top of the paper shredder (7). Two paper shredder discs (8) driven by a drive source are rotatably installed inside the paper shredder (7). A paper collection drawer (9) is provided inside the paper shredder (7) below the paper shredder discs (8). A paper feeder (11) is fixedly installed on the upper surface of the paper shredder (7) above the paper inlet (10).

2. The dual-purpose shredder for plastics and paper according to claim 1, characterized in that, The plastic crushing box (1) is fixedly connected to one side of the paper shredder (7). The top of the plastic crushing box (1) away from the paper shredder (7) is provided with a plastic feeding port (6). A feeding cover plate (31) is movably hinged to the plastic feeding port (6), and a torsion spring (32) is provided at the hinge position. One end of the torsion spring (32) is fixedly connected to the feeding cover plate (31), and the other end of the torsion spring (32) is fixedly connected to the plastic crushing box (1).

3. The dual-purpose shredder for plastics and paper according to claim 1, characterized in that, Both the plastic feeding port (6) and the feeding cover plate (31) are circular.

4. A dual-purpose shredder for plastics and paper according to claim 1, characterized in that, The paper feeder (11) includes a limiting piece (15) located on one side above the paper feed inlet (10) and a second inclined seat (29) located on the other side above the paper feed inlet (10). The upper surface of the second inclined seat (29) is an inclined surface, and a paper stacking rack (12) is fixedly installed on the surface of the inclined surface. A paper temporary storage cavity (24) is provided inside the paper stacking rack (12). A paper outlet (20) communicating with the paper temporary storage cavity (24) is opened at the bottom position of the side of the paper stacking rack (12) close to the paper feed inlet (10). A paper release port (38) is opened on the other side of the paper stacking rack (12).

5. A dual-purpose shredder for plastics and paper according to claim 4, characterized in that, A paper feed roller (16) is provided between the paper inlet (10) and the shredder disc (8). There are two paper feed rollers (16). A paper feeding channel is provided between the two paper feed rollers (16). The paper feeding channel is located below the paper inlet (10). The limiting piece (15) is arranged at an angle, and the bottom of the limiting piece (15) is located above the paper feeding channel.

6. A dual-purpose shredder for plastics and paper according to claim 5, characterized in that, The upper surface of the shredder (7) is fixedly mounted with a first inclined seat (28). The upper end of the limiting piece (15) extends to the outside of the shredder (7) and is fixedly connected to the surface of the first inclined seat (28). The upper surface of the limiting piece (15) is fixedly connected with a limiting baffle (17). The upper surface of the limiting baffle (17) is fixedly connected with a limiting member (18). The limiting piece (15) and the limiting member (18) are located on the same straight line as the limiting baffle (17) with a guide opening (19).

7. A dual-purpose shredder for plastics and paper according to claim 6, characterized in that, The inner surface of the paper stacking rack (12) is slidably mounted with a pressure plate (22) above the paper temporary placement cavity (24). The top of the paper stacking rack (12) is fixedly connected with a top plate (21) arranged parallel to the pressure plate (22). The top plate (21) and the pressure plate (22) are movably connected by a spring (23). The upper surface of the pressure plate (22) is fixedly connected with a lifting member (26).

8. A dual-purpose shredder for plastics and paper according to claim 7, characterized in that, The paper feed seat (11) is rotatably mounted with a first paper feed roller (13), a second paper feed roller (14) and a third paper feed roller (27) driven by a drive source. The upper surface of the second inclined seat (29) is provided with a wheel cavity (30) for accommodating the first paper feed roller (13), and the paper stacking rack (12) is provided with an opening (25) on the side near the first paper feed roller (13). When paper is placed in the paper temporary placement cavity (24), the surface of the first paper feed roller (13) is in contact with the lower surface of the paper at the bottom.

9. A dual-purpose shredder for plastics and paper according to claim 8, characterized in that, The second paper feed roller (14) and the third paper feed roller (27) are both located on the side of the second inclined seat (29) near the paper feed port (10). When the paper is fed out from the paper outlet (20), the second paper feed roller (14) and the third paper feed roller (27) come into contact with the paper in sequence, and the second paper feed roller (14) and the third paper feed roller (27) rotate to drive the paper to move towards the paper feed port (10).

10. A dual-purpose shredder for plastics and paper according to claim 1, characterized in that, A horizontally arranged filter screen (33) is fixedly installed at the bottom of the shredder (7). A fan (34) is fixedly installed below the filter screen (33). An air outlet pipe is provided on one side of the fan (34) and extends through to the outside of the shredder (7). An air inlet pipe (35) is provided on the other side of the fan (34) and is located below the filter screen (33). A slide rail (36) is provided on the upper surface of the filter screen (33). A roller (37) is slidably installed on the upper surface of the slide rail (36). The roller (37) is rotatably installed at the bottom of the shredder collection drawer (9).

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