Recycled material pre-drying device

Abstract

The utility model discloses a reclaimed material pre-drying device which comprises a pretreatment box, first conveying shafts are symmetrically installed in an inner cavity of the pretreatment box, one end of the first conveying shaft on one side is connected with the output end of a first servo motor, and a driving roller is fixedly installed on the first conveying shaft on one side. A driven roller is fixedly installed on the first conveying shaft on the other side, a conveying net belt is connected between the driving roller and the driven roller in a sleeving mode, a bearing frame is fixedly installed on the top face of the pretreatment box, a transmission shaft is installed on the bearing frame, and eccentric wheels are symmetrically and fixedly installed on the transmission shaft; a first belt pulley is fixedly installed at one end of the first conveying shaft on one side, a second belt pulley is fixedly installed at one end of the transmission shaft, and a transmission belt is connected between the first belt pulley and the second belt pulley in a sleeved mode. The puncturing and draining device has the advantages that the conveying motor can be used for driving the puncturing needle to puncture and drain recycled materials, the production cost of the puncturing needle component is reduced, the puncturing and draining effect is better, and practicability is higher.

Description

Technical Field

[0001] This utility model relates to the field of plastic recycling and processing technology, and more specifically, to a pre-drying device for recycled materials. Background Technology

[0002] Plastics are widely used in people's daily lives, which in turn generates a huge amount of waste plastics. Due to the recyclability of plastics, waste plastics can be recycled. They are first washed and dried before being made into other plastic products. Since some recycled materials such as plastic films contain water, it is necessary to drain and pre-dry this water during the recycling process to facilitate subsequent recycling and processing.

[0003] The prior art discloses a drying device for recycling waste plastics with application number CN202320839103.1. In use, this utility model uses a piercing needle component to puncture the plastic recycling material to be dried, so that the water trapped in the plastic recycling material can flow out. However, the piercing needle component requires multiple second motors for driving, which makes the structure of the device relatively complex, the manufacturing cost of the piercing needle component is high, and its practicality is relatively limited. In addition, the piercing area of ​​the piercing rod is small, and the effect of draining water from the recycling material is relatively limited. In view of the shortcomings of this utility model, those skilled in the art have proposed a pre-drying device for recycling materials. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a pre-drying device for recycled materials, which has the advantages of being able to use a conveyor motor to drive needles to puncture and drain the recycled materials, reducing the production cost of the needle components, and having better puncture and drainage effects and greater practicality, thereby solving the problems in the background technology mentioned above.

[0005] To achieve the advantages of using a conveyor motor to drive needles to puncture and drain recycled materials, reducing the production cost of needle components, and providing better puncture and drainage effects and greater practicality, the specific technical solution adopted by this utility model is as follows: A pre-drying device for recycled materials includes a pre-treatment box. A first conveyor shaft is symmetrically installed inside the pre-treatment box. One end of one side of the first conveyor shaft is connected to the output end of a first servo motor. A drive roller is fixedly installed on one side of the first conveyor shaft, and a driven roller is fixedly installed on the other side of the first conveyor shaft. A conveyor belt is sleeved between the drive roller and the driven roller. A shaft is fixedly installed on the top surface of the pre-treatment box. The pretreatment box has a support frame and a bearing frame on which a drive shaft is mounted. Eccentric wheels are symmetrically fixed on the drive shaft. A first pulley is fixedly mounted on one end of the first conveying shaft on one side, and a second pulley is fixedly mounted on one end of the drive shaft. A drive belt is sleeved between the first pulley and the second pulley. A connecting sleeve is uniformly fixedly mounted on the top surface of the pretreatment box, and a connecting rod is sleeved inside the connecting sleeve. A pressure plate is fixedly mounted on the top of the connecting rod. Several return springs are uniformly mounted between the bottom surface of the pressure plate and the top surface of the pretreatment box. A piercing plate is fixedly mounted on the bottom end of the connecting rod, and several piercing needles are uniformly mounted on the bottom surface of the piercing plate.

[0006] Furthermore, a pre-drying chamber is fixedly installed on one side of the pretreatment box. A second conveying shaft is symmetrically installed inside the pre-drying chamber, and conveying rollers are symmetrically fixedly installed on the second conveying shaft. One end of the second conveying shaft on one side is connected to the output end of a second servo motor. A conveyor belt is sleeved between the two conveying rollers. A hot air blower is installed on the top surface of the pre-drying chamber, and one end of the hot air blower is connected to an air supply pipe. The other end of the air supply pipe is connected to an air distribution box. The air distribution box is fixedly installed on the top surface of the pre-drying chamber, and several hot air nozzles are evenly installed on the bottom surface of the air distribution box.

[0007] Furthermore, the inner wall of the pretreatment box is symmetrically provided with pull-out grooves, the side wall of the pretreatment box is provided with a pick-up and put-out opening, and an installation frame is embedded in the pick-up and put-out opening. Pull-out sliding plates are symmetrically fixedly installed on both sides of the installation frame, and the pull-out sliding plates are embedded in the pull-out grooves. A filter screen is fixedly installed on the installation frame, and a drain pipe is connected to one side of the bottom of the inner cavity of the pretreatment box.

[0008] Furthermore, a control panel is fixedly installed on the side wall of the pretreatment box, and the control panel is electrically connected to the first servo motor, the second servo motor and the hot air blower.

[0009] Furthermore, a feed hopper is connected to the top surface of the pretreatment box.

[0010] Furthermore, the pretreatment box has a discharge port on its side wall, and a guide seat is fixedly installed inside the discharge port. The pre-drying box has a discharge port on one side of its top surface, and the discharge port is located below one end of the guide seat.

[0011] Furthermore, the pre-drying chamber has a discharge port on its side wall.

[0012] Compared with the prior art, the present invention provides a pre-drying device for recycled materials, which has the following beneficial effects:

[0013] (1) This utility model is equipped with a pretreatment box. The pretreatment box has symmetrically installed first conveyor shafts inside. One end of the first conveyor shaft is connected to the output end of a first servo motor. An active roller is fixedly installed on one side of the first conveyor shaft, and a driven roller is fixedly installed on the other side of the first conveyor shaft. A conveyor belt is sleeved between the active roller and the driven roller. In use, the worker can pour the plastic recycling material to be processed onto the conveyor belt through the feed hopper, and then start the first servo motor to drive the first conveyor shaft to rotate. The active roller and the driven roller can then drive the conveyor belt to rotate, thereby realizing the transfer of the plastic recycling material. On the other hand, a bearing bracket is fixedly installed on the top surface of the pretreatment box, and a drive shaft is installed on the bearing bracket. Eccentric wheels are symmetrically fixedly installed on the drive shaft. A first pulley is fixedly installed at one end of the first conveying shaft on one side, and a second pulley is fixedly installed at one end of the drive shaft. A drive belt is sleeved between the first pulley and the second pulley. Therefore, when the first conveying shaft rotates, it can drive the drive shaft and the eccentric wheels to rotate. Connecting sleeves are uniformly fixedly installed on the top surface of the pretreatment box, and connecting rods are sleeved inside the connecting sleeves. A pressure plate is fixedly installed at the top of the connecting rod. The bottom surface of the pressure plate... Several return springs are evenly installed between the pretreatment box and the top surface. A piercing plate is fixedly installed at the bottom of the connecting slide rod, and several piercing needles are evenly installed on the bottom surface of the piercing plate. Therefore, when the eccentric wheel rotates, it can push the pressure plate to drive the piercing plate and piercing needles to reciprocate along the direction of the connecting slide rod. Thus, the plastic recycling material on the conveyor belt can be pierced by several piercing needles. This allows a recycling material pre-drying device to use the conveyor motor to drive the piercing needles to pierce and drain the recycling material, reducing the production cost of the piercing needle components, and improving the piercing and drainage effect, making it more practical. After the plastic recycling material is pierced... The water inside the pretreatment tank can fall into the bottom of the pretreatment chamber. The inner wall of the pretreatment tank is symmetrically provided with pull-out grooves, and the side wall of the pretreatment tank is provided with a pick-up and drop-out port. An installation frame is installed in the pick-up and drop-out port. Pull-out sliding plates are symmetrically fixed on both sides of the installation frame and are embedded in the pull-out grooves. A filter screen is fixedly installed on the installation frame. The filter screen can filter out solid impurities in the water to ensure that the discharged water will not cause blockage of the drain pipe, which is conducive to subsequent sewage treatment. The installation frame is easy to pick up and drop, and it is easy to clean the filter screen, making it more practical.

[0014] (2) This utility model is equipped with a pre-drying box. The pre-drying box is fixedly installed on one side of the pre-treatment box. As mentioned above, after the plastic recycling material is punctured and drained, it can move with the conveyor belt to the discharge port opened on the side wall of the pre-treatment box and slide down along the guide seat into the discharge port opened on the top surface of the pre-drying box. The inner cavity of the pre-drying box is symmetrically equipped with a second conveying shaft, and conveying rollers are symmetrically fixedly installed on the second conveying shaft. One end of the second conveying shaft on one side is connected to the output end of the second servo motor. A conveyor belt is sleeved between the two conveying rollers. Therefore, when the second servo motor is started through the control panel to drive the second conveying shaft to rotate, the conveyor belt can be driven to rotate and convey the punctured plastic material. After the plastic recycling material is drained, a hot air blower is installed on the top of the pre-drying chamber. One end of the hot air blower is connected to an air supply pipe, and the other end of the air supply pipe is connected to an air distribution box. The air distribution box is fixedly installed on the top of the inner cavity of the pre-drying chamber, and several hot air nozzles are evenly installed on the bottom of the air distribution box. By starting the hot air blower, the generated drying hot air can be introduced into the inner cavity of the air distribution box through the air supply pipe, and finally sprayed onto the surface of the plastic recycling material through several hot air nozzles. This achieves pre-drying of the water droplets remaining on the surface of the plastic recycling material, reducing the impact of excessive water droplets on the subsequent thorough drying effect, and making it more practical. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a pre-drying device for recycled materials according to an embodiment of the present utility model;

[0017] Figure 2 This is a front view of a pre-drying device for recycled materials according to an embodiment of the present utility model;

[0018] Figure 3 This is a side view of a pre-drying device for recycled materials according to an embodiment of the present utility model;

[0019] Figure 4 According to the embodiments of this utility model Figure 1 Enlarged view of point A;

[0020] Figure 5 According to the embodiments of this utility model Figure 1 Enlarged view of point B;

[0021] Figure 6 This is a perspective view of the drive shaft and eccentric wheel of a pre-drying device for recycled materials according to an embodiment of the present utility model.

[0022] In the picture:

[0023] 1. Feed hopper; 2. Pretreatment box; 3. First conveyor shaft; 4. Drive roller; 5. Pull-out chute; 6. Mounting frame; 7. Filter screen; 8. Drain pipe; 9. Conveyor belt; 10. Driven roller; 11. Second conveyor shaft; 12. Conveyor belt; 13. Conveyor roller; 14. Discharge port; 15. Piercing needle; 16. Discharge port; 17. Guide seat; 18. Feed outlet; 19. Hot air blower; 20. Pre-drying box; 21. Conveyor... 21. Air tube; 22. Second servo motor; 23. Loading / unloading port; 24. Pull-out sliding plate; 25. First pulley; 26. Transmission belt; 27. Second pulley; 28. Eccentric wheel; 29. ​​Pressure plate; 30. Return spring; 31. First servo motor; 32. Control panel; 33. Bearing bracket; 34. Transmission shaft; 35. Connecting slide rod; 36. Connecting sleeve; 37. Puncture plate; 38. Air distribution box; 39. Hot air nozzle. Detailed Implementation

[0024] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0025] According to an embodiment of the present invention, a pre-drying device for recycled materials is provided.

[0026] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-6As shown, a pre-drying device for recycled materials according to an embodiment of the present invention includes a pretreatment box 2. A first conveyor shaft 3 is symmetrically installed inside the pretreatment box 2. One end of one side of the first conveyor shaft 3 is connected to the output end of a first servo motor 31. A drive roller 4 is fixedly installed on one side of the first conveyor shaft 3, and a driven roller 10 is fixedly installed on the other side of the first conveyor shaft 3. A conveyor belt 9 is sleeved between the drive roller 4 and the driven roller 10. A bearing bracket 33 is fixedly installed on the top surface of the pretreatment box 2, and a transmission shaft 34 is installed on the bearing bracket 33. Eccentric wheels 28 are symmetrically fixedly installed on the transmission shaft 34. A first pulley 25 is fixedly installed at one end of one side of the first conveyor shaft 3, and a first belt pulley 25 is fixedly installed at one end of the transmission shaft 34. A second pulley 27 is fixedly installed, and a transmission belt 26 is sleeved between the first pulley 25 and the second pulley 27. A connecting sleeve 36 is uniformly fixedly installed on the top surface of the pretreatment box 2, and a connecting rod 35 is sleeved inside the connecting sleeve 36. A pressure plate 29 is fixedly installed at the top of the connecting rod 35. Several return springs 30 are uniformly installed between the bottom surface of the pressure plate 29 and the top surface of the pretreatment box 2. A piercing plate 37 is fixedly installed at the bottom end of the connecting rod 35, and several piercing needles 15 are uniformly installed on the bottom surface of the piercing plate 37. This allows the piercing needles to be driven by the conveyor motor to pierce and drain the recycled material, reducing the production cost of the piercing needle components and improving the piercing and drainage effect, making it more practical.

[0027] In one embodiment, a pre-drying box 20 is fixedly installed on one side of the pre-treatment box 2. A second conveying shaft 11 is symmetrically installed inside the pre-drying box 20, and conveying rollers 13 are symmetrically fixedly installed on the second conveying shaft 11. One end of the second conveying shaft 11 is connected to the output end of a second servo motor 22. A conveyor belt 12 is sleeved between the two conveying rollers 13. A hot air blower 19 is installed on the top surface of the pre-drying box 20, and the output end of the hot air blower 19 is connected to one end of an air supply pipe 21. The other end of the air supply pipe 21 is connected to a uniform air distribution box 38. The uniform air distribution box 38 is fixedly installed on the top surface of the inner cavity of the pre-drying box 20, and several hot air nozzles 39 are evenly installed on the bottom surface of the uniform air distribution box 38. This achieves the pre-drying of water droplets remaining on the surface of the recycled plastic material, reducing the effect of excessive water droplets on the surface of the recycled material affecting its subsequent thorough drying, and making it more practical.

[0028] In one embodiment, the inner wall of the pretreatment box 2 is symmetrically provided with pull-out grooves 5, and the side wall of the pretreatment box 2 is provided with a pick-up and drop-out port 23. An installation frame 6 is embedded in the pick-up and drop-out port 23. Pull-out sliding plates 24 are symmetrically fixedly installed on both sides of the installation frame 6, and the pull-out sliding plates 24 are embedded in the pull-out grooves 5. A filter screen 7 is fixedly installed on the installation frame 6. A drain pipe 8 is connected to one side of the bottom of the inner cavity of the pretreatment box 2. The filter screen 7 can filter and remove solid impurities in the accumulated water to ensure that the discharged water will not cause blockage of the drain pipe 8, so as to facilitate subsequent sewage treatment. The installation frame 6 is easy to pick up and drop, and it is convenient to clean the filter screen 7 later, making it more practical.

[0029] In one embodiment, a control panel 32 is fixedly installed on the side wall of the pretreatment box 2, and the control panel 32 is electrically connected to the first servo motor 31, the second servo motor 22 and the hot air blower 19. The control circuit of the control panel can be implemented by simple programming by those skilled in the art, which is common knowledge in the art. It is only used and not modified, so the control method and circuit connection will not be described in detail.

[0030] In one embodiment, a feed hopper 1 is connected to the top surface of the pretreatment box 2, which serves to guide the recycled material to be processed into the inner cavity of the pretreatment box 2.

[0031] In one embodiment, a discharge port 16 is provided on the side wall of the pretreatment box 2, and a guide seat 17 is fixedly installed inside the discharge port 16. A discharge port 18 is provided on one side of the top surface of the pre-drying box 20, and the discharge port 18 is located below one end of the guide seat 17, which serves to guide the recycled material after puncturing and draining into the inner cavity of the pre-drying box 20.

[0032] In one embodiment, the pre-drying chamber 20 has a discharge port 14 on its side wall, which serves to discharge the pre-dried recycled material for thorough drying.

[0033] Working Principle: This utility model is equipped with a pre-treatment box 2. A first conveyor shaft 3 is symmetrically installed inside the pre-treatment box 2. One end of one side of the first conveyor shaft 3 is connected to the output end of a first servo motor 31. A drive roller 4 is fixedly installed on one side of the first conveyor shaft 3, and a driven roller 10 is fixedly installed on the other side. A conveyor belt 9 is sleeved between the drive roller 4 and the driven roller 10. In use, the worker can pour the plastic recycling material to be processed onto the conveyor belt 9 through the feed hopper 1, and then start the first servo motor 31 to drive the first conveyor shaft 3 to rotate. The drive roller 4 and the driven roller 10 then drive the conveyor belt 9 to rotate, thus conveying the plastic recycling material. On the other hand, a shaft is fixedly installed on the top surface of the pre-treatment box 2. A support frame 33 is provided, and a drive shaft 34 is mounted on the bearing frame 33. Eccentric wheels 28 are symmetrically fixedly mounted on the drive shaft 34. A first pulley 25 is fixedly mounted at one end of a first conveyor shaft 3 on one side, and a second pulley 27 is fixedly mounted at one end of the drive shaft 34. A drive belt 26 is sleeved between the first pulley 25 and the second pulley 27. Therefore, when the first conveyor shaft 3 rotates, it can drive the drive shaft 34 and the eccentric wheel 28 to rotate. A connecting sleeve 36 is uniformly fixedly mounted on the top surface of the pretreatment box 2, and a connecting rod 35 is sleeved inside the connecting sleeve 36. A pressure plate 29 is fixedly mounted on the top of the connecting rod 35. Several return springs 30 are uniformly installed between the bottom surface of the pressure plate 29 and the top surface of the pretreatment box 2. A piercing plate 37 is fixedly installed at the bottom of the connecting slide rod 35, and several piercing needles 15 are evenly installed on the bottom surface of the piercing plate 37. Therefore, when the eccentric wheel 28 rotates, it can push the pressure plate 29 to drive the piercing plate 37 and the piercing needles 15 to reciprocate along the direction of the connecting slide rod 35. Thus, the plastic recycling material on the conveyor belt 9 can be pierced by several piercing needles 15. This allows a recycling material pre-drying device to use the conveyor motor to drive the piercing needles to pierce and drain the recycling material, reducing the production cost of the piercing needle components and improving the piercing and drainage effect, making it more practical. After the plastic recycling material is pierced, the water trapped inside can fall into the bottom of the pretreatment box 2. The inner wall of the pretreatment box 2 is symmetrically provided with pull-out grooves 5, and the side walls of the pretreatment box 2 are also provided with pull-out grooves 5. The system includes an access port 23, within which an installation frame 6 is fitted. Slide-out slides 24 are symmetrically fixed on both sides of the installation frame 6, and these slide-out slides 24 are fitted into slide grooves 5. A filter screen 7 is fixedly installed on the installation frame 6. The filter screen 7 filters and removes solid impurities from the accumulated water, ensuring that the discharged water does not clog the drain pipe 8, facilitating subsequent wastewater treatment. The installation frame 6 is easy to access and convenient for cleaning the filter screen 7, enhancing its practicality. Additionally, this invention includes a pre-drying box 20, which is fixedly installed on one side of the pretreatment box 2. As described above, after puncturing the drain, the recycled plastic material can move along the conveyor belt 9 to the discharge port 16 on the side wall of the pretreatment box 2.The material slides down along the guide seat 17 into the discharge port 18 on the top surface of the pre-drying box 20. A second conveyor shaft 11 is symmetrically installed inside the pre-drying box 20, and conveyor rollers 13 are symmetrically fixed on the second conveyor shaft 11. One end of one side of the second conveyor shaft 11 is connected to the output end of a second servo motor 22. A conveyor belt 12 is sleeved between the two conveyor rollers 13. Therefore, when the second servo motor 22 is started via the control panel 32 to drive the second conveyor shaft 11 to rotate, it can drive the conveyor belt 12 to rotate and transport the punctured and drained plastic recycled material. A hot air blower 19 is installed on the top surface of the pre-drying box 20. The output end of unit 9 is connected to one end of an air supply pipe 21, and the other end of the air supply pipe 21 is connected to an air distribution box 38. The air distribution box 38 is fixedly installed on the top surface of the inner cavity of the pre-drying chamber 20, and several hot air nozzles 39 are evenly installed on the bottom surface of the air distribution box 38. By starting the hot air blower 19, the generated drying hot air can be introduced into the inner cavity of the air distribution box 38 through the air supply pipe 21, and finally sprayed onto the surface of the plastic recycled material through the several hot air nozzles 39. This achieves pre-drying of the water droplets remaining on the surface of the plastic recycled material, reducing the impact of excessive water droplets on the subsequent thorough drying effect, and making it more practical.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pre-drying device for recycled materials, comprising a pretreatment box (2), characterized in that, The pretreatment box (2) has a first conveyor shaft (3) symmetrically installed inside. One end of the first conveyor shaft (3) is connected to the output end of a first servo motor (31). A drive roller (4) is fixedly installed on the first conveyor shaft (3) on one side, and a driven roller (10) is fixedly installed on the first conveyor shaft (3) on the other side. A conveyor belt (9) is sleeved between the drive roller (4) and the driven roller (10). A bearing bracket (33) is fixedly installed on the top surface of the pretreatment box (2), and a drive shaft (34) is installed on the bearing bracket (33). An eccentric wheel (28) is symmetrically fixedly installed on the drive shaft (34). A first belt is fixedly installed on one end of the first conveyor shaft (3) on one side. The first pulley (25) is fixedly mounted with a second pulley (27) at one end of the drive shaft (34). A drive belt (26) is sleeved between the first pulley (25) and the second pulley (27). A connecting sleeve (36) is uniformly fixedly mounted on the top surface of the pretreatment box (2). A connecting rod (35) is sleeved inside the connecting sleeve (36). A pressure plate (29) is fixedly mounted on the top of the connecting rod (35). Several return springs (30) are uniformly mounted between the bottom surface of the pressure plate (29) and the top surface of the pretreatment box (2). A piercing plate (37) is fixedly mounted on the bottom end of the connecting rod (35). Several piercing needles (15) are uniformly mounted on the bottom surface of the piercing plate (37).

2. The pre-drying device for recycled materials according to claim 1, characterized in that, A pre-drying box (20) is fixedly installed on one side of the pre-treatment box (2). A second conveying shaft (11) is symmetrically installed inside the pre-drying box (20), and a conveying roller (13) is symmetrically fixedly installed on the second conveying shaft (11). One end of the second conveying shaft (11) is connected to the output end of a second servo motor (22). A conveyor belt (12) is sleeved between the two conveying rollers (13). A hot air blower (19) is installed on the top surface of the pre-drying box (20), and one end of a gas supply pipe (21) is connected to the output end of the hot air blower (19). The other end of the gas supply pipe (21) is connected to a gas equalization box (38). The gas equalization box (38) is fixedly installed on the top surface of the inner cavity of the pre-drying box (20), and several hot air nozzles (39) are evenly installed on the bottom surface of the gas equalization box (38).

3. The pre-drying device for recycled materials according to claim 1, characterized in that, The pretreatment box (2) has symmetrical pull-out grooves (5) on its inner wall. The pretreatment box (2) has a take-out opening (23) on its side wall. An installation frame (6) is installed in the take-out opening (23). Pull-out sliding plates (24) are symmetrically fixed on both sides of the installation frame (6). The pull-out sliding plates (24) are embedded in the pull-out grooves (5). A filter screen (7) is fixedly installed on the installation frame (6). A drain pipe (8) is connected to one side of the bottom of the pretreatment box (2).

4. The pre-drying device for recycled materials according to claim 1, characterized in that, The pretreatment box (2) is fixedly installed with a control panel (32) on its side wall, and the control panel (32) is electrically connected to the first servo motor (31), the second servo motor (22) and the hot air blower (19).

5. The pre-drying device for recycled materials according to claim 1, characterized in that, The top surface of the pretreatment box (2) is connected to the feed hopper (1).

6. A pre-drying device for recycled materials according to claim 2, characterized in that, The pretreatment box (2) has a discharge port (16) on its side wall, and a guide seat (17) is fixedly installed inside the discharge port (16). The pre-drying box (20) has a discharge port (18) on one side of its top surface, and the discharge port (18) is located below one end of the guide seat (17).

7. A pre-drying device for recycled materials according to claim 2, characterized in that, The pre-drying box (20) has a discharge port (14) on its side wall.

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