Raw material drying device for processing preservative film

Abstract

The utility model discloses a raw material drying device for processing a preservative film, and relates to the technical field of preservative film processing, the raw material drying device comprises a device main body, one side of the top of the device main body is respectively provided with a charging port and a first motor, the top of the charging port is communicated with a storage bin, and a discharging roller is arranged in the charging port through a rotating shaft; when the discharging device works, the first motor drives the rotating shaft and the discharging roller to stably rotate through a transmission structure composed of the driving synchronous belt, the synchronous wheel and the driven synchronous belt, so that the discharging groove periodically passes through a discharging opening of a storage bin at the set frequency (such as 20 revolutions per minute), and when the discharging groove containing particles rotates downwards, the discharging groove is driven to rotate downwards. The particles quantitatively fall into the groove and are discharged along with rotation of the discharging roller, intermittent uniform discharging is achieved, the phenomenon that the particles are too thick due to uneven manual discharging can be avoided, local'drying blind areas' are eliminated, and the later drying effect is improved.

Description

A raw material drying device for processing plastic wrap Technical Field

[0001] This utility model relates to the field of food preservation film processing technology, specifically to a raw material drying device for food preservation film processing. Background Technology

[0002] As an essential product in food packaging and industrial fields, the drying quality of polyethylene (PE) granules, the core raw material of cling film, directly affects the transparency, tensile strength, and hygiene indicators of the finished product. During the production, storage, and transportation of PE granules, it is inevitable that moisture or trace amounts of solvents from the processing will be absorbed. If this moisture is not completely removed, it will have multi-dimensional negative impacts on the production of cling film and the quality of the finished product. Therefore, drying equipment is a core and essential piece of equipment in the cling film production process.

[0003] Most existing raw material drying equipment relies on manual dumping of raw materials by operators. This method is significantly affected by factors such as operator experience and fatigue, making it impossible to precisely control the feeding rhythm and particle density. For example, manual operation makes it difficult to ensure a consistent feeding speed for each batch, easily leading to uneven particle distribution on the conveyor belt. Some areas may accumulate too thickly, forming "drying blind spots" that are not thoroughly dried, affecting subsequent drying efficiency. Secondly, the hot air nozzles of traditional equipment are mostly fixed, and the hot air generated by the fixed nozzles provides static coverage, only forming a brief vertical heat exchange with the particle surface. When the particles move rapidly with the conveyor belt, the contact path between the hot air and the particles is singular and the contact time is insufficient. Especially for thickly packed particles, the internal moisture is difficult to evaporate effectively. Summary of the Invention

[0004] Therefore, the purpose of this utility model is to provide a raw material drying device for processing plastic wrap, so as to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a raw material drying device for processing cling film, comprising a main body, a feeding port and a first motor respectively provided on one side of the top of the main body, a storage bin connected to the top of the feeding port, a feeding roller mounted inside the feeding port via a rotating shaft, a feeding groove formed on the outer surface of the feeding roller, a actuating disc and a driven synchronous wheel respectively fixed at both ends of the rotating shaft, a driving synchronous wheel connected to the output end of the first motor, and a synchronous belt meshing on the outer surfaces of the driving and driven synchronous wheels, and a linkage rod rotatably connected to the outer surface of the actuating disc. Furthermore, a movable rod is hinged to one end of the linkage rod, and a toothed rod is fixed to the bottom end of the movable rod. A positioning block is fixed to the top of the main body of the device, and the movable rod slides in cooperation with the positioning block. A hot air blower is installed at the bottom of the main body of the device. The air outlet of the hot air blower is connected to a distribution pipe through a hot air pipe, and the back of the distribution pipe is connected to multiple sets of rotating pipes through a rotary joint. The rotating pipes are rotatably connected to the main body of the device through bearings. A gear is fixed to one side of the outer surface of the multiple sets of rotating pipes, and the gear meshes with the toothed rod. Multiple sets of nozzles are fixed to the bottom of the multiple sets of rotating pipes. A turning plow and a dispersing rake are fixed inside the main body of the device.

[0006] Furthermore, multiple sets of rotating rollers are installed inside the main body of the device, and a conveyor belt is sleeved on the outer surface of the multiple sets of rotating rollers. One end of one set of rotating rollers is fixed with a driven sprocket. A second motor is installed on one side of the bottom of the main body of the device. The output end of the second motor is connected to a driving sprocket, and a chain meshes on the outer surfaces of the driving sprocket and the driven sprocket.

[0007] By adopting the above technical solution, the second motor drives the corresponding rotating roller to rotate through the meshing transmission of the active sprocket, chain and driven sprocket, thereby driving multiple sets of rotating rollers to operate synchronously to transport materials. This design utilizes the high reliability and stability of sprocket and chain transmission to ensure that the conveyor belt runs at a uniform speed, avoids uneven accumulation of materials due to conveying fluctuations, and provides a stable material transport foundation for the subsequent drying process.

[0008] Furthermore, a guide block is fixed to one side of the inner side of the main body of the device, and the top of the guide block is inclined towards the conveyor belt.

[0009] By adopting the above technical solution, the particles unloaded by the feed roller are guided by gravity to slide evenly down the inclined surface to the conveyor belt, providing a uniform material base for subsequent material turning, dispersion and hot air drying.

[0010] Furthermore, a through-hole is provided on one side of the main body of the device, and a guide plate is fixed inside the through-hole.

[0011] By adopting the above technical solution, gravity is used to guide the material smoothly through the opening to the subsequent process along the inclined plane, making material discharge more convenient.

[0012] Furthermore, a control panel is installed on one side of the top of the main body of the device, and the first motor, the second motor and the hot air blower are all electrically connected to the control panel.

[0013] By adopting the above technical solution, operators can adjust the feeding speed, conveyor belt speed and hot air parameters in real time through the panel; this design realizes centralized and digital control of equipment operating parameters, significantly improves the ease of operation and adaptability to production processes, meets the flexible switching of different raw material moisture content and capacity requirements, and realizes dynamic coordinated matching of feeding roller speed, rotating tube oscillation frequency and conveyor belt speed.

[0014] Furthermore, a protective box is fixed above the outer surface of the main body of the device, and the rack and gear are both located inside the protective box. The top of the protective box has an opening for movement.

[0015] By adopting the above technical solution, the protective box encloses and protects the rack and gear, while allowing the reciprocating motion of the movable rod through the top opening, thus preventing interference with the mechanical transmission components, avoiding accidental injury to staff when swinging, and also providing a certain degree of dust protection.

[0016] Furthermore, a moisture pipe extends through the top of the device.

[0017] By adopting the above technical solution, the humid air pipe is used to discharge the hot and humid air generated during the drying process, and the principle of hot air rising is used to achieve efficient discharge of moisture. This design can remove saturated humid air in time, maintain a dry environment inside the device, avoid moisture retention that affects drying efficiency, and prevent condensation from causing secondary pollution to polyethylene particles.

[0018] Furthermore, the outer wall of the feeding roller is in contact with the inner wall of the feeding port, and the outer surface of the feeding roller is provided with a rubber layer.

[0019] By adopting the above technical solution, the slight contact between the rubber layer and the feeding port can prevent the leakage of raw material particles.

[0020] Furthermore, both the turning plow and the dispersing harrow are provided in two sets, and the plow blade spacing of the turning plow is 300mm and the inclination angle is 45°; the harrow tooth spacing of the dispersing harrow is 30mm.

[0021] By adopting the above technical solutions, the turning plow can turn the raw material particles over, while the dispersing rake can disperse the raw material particles. Combined with the oscillating hot air, it can achieve efficient penetration and significantly improve the drying uniformity and efficiency.

[0022] In summary, the present invention has the following main advantages:

[0023] 1. This utility model features a storage bin at the top of the feeding port, allowing workers to temporarily store a fixed amount of raw materials at a time. This avoids the problem of unstable feeding rhythm caused by frequent manual dumping in traditional methods. The first motor drives the rotating shaft and feeding roller to rotate stably through a transmission structure consisting of an active synchronous belt, a synchronous pulley, and a driven synchronous belt. This causes the feeding trough to periodically pass through the feeding port of the storage bin at a set frequency (e.g., 20 revolutions per minute). When the feeding trough containing particles rotates to face downwards, the particles fall into the trough in a fixed amount and are discharged with the rotation of the feeding roller. This achieves intermittent and uniform feeding, avoiding the phenomenon of excessive particle thickness caused by uneven manual feeding, eliminating local "drying blind spots," and improving the subsequent drying effect.

[0024] 2. This utility model is based on an intermittent feeding design and also includes a selection tube, a rack, a gear, a linkage rod, and other structures. The actuating disc at one end of the rotating shaft rotates synchronously with the feeding roller (the rotating shaft rotates at 20 revolutions per minute; the feeding roller has three sets of feeding grooves, feeding three times per revolution). The actuating disc has an eccentric pin on its surface. The eccentric pin drives the movable rod and the rack to swing left and right via the linkage rod. The rack's displacement drives the gear outside the rotating tube to rotate periodically in both directions, thereby causing the nozzle connected to the rotating tube to swing left and right by 60° along the conveyor belt direction (total swing angle 120°). With a frequency of 20 times / minute, it can meet the matching of feeding frequency and oscillation frequency, and at the same time meet the needs of production process. Compared with the static vertical heat exchange of traditional fixed nozzles, the oscillating nozzle can dynamically extend the contact path between hot air and particles, increase the hot air coverage time on the particle surface, and improve the drying effect. It is especially effective in evaporating internal moisture of thick-layered particles. The coaxial transmission ensures that the intermittent feeding rhythm and hot air oscillation cycle are strictly matched, eliminating the risk of frequency mismatch in traditional multi-system linkage from the source and preventing the phenomenon of incomplete drying.

[0025] 3. Furthermore, this invention utilizes the curved blades of a turning plow to cut into the particle layer on the conveyor belt at a 45° angle, continuously turning over the accumulated particles during conveyor belt operation. Following this, a separating rake, with its evenly spaced teeth, smooths the uneven material surface. After being turned and dispersed, the particle layer, under the dynamic hot air action of the oscillating nozzle, allows the hot air to penetrate longitudinally through the gaps between particles, further reducing the moisture content of the polyethylene particles. Attached Figure Description

[0026] Figure 1 is a schematic diagram of the structure of this utility model;

[0027] Figure 2 is a schematic cross-sectional view of the main body of the device of this utility model;

[0028] Figure 3 is a schematic diagram of the rack structure of this utility model;

[0029] Figure 4 is a schematic diagram of the structure of the material turning plow and the dispersing harrow of this utility model;

[0030] Figure 5 is a schematic diagram of the movable rod structure of this utility model;

[0031] Figure 6 is a schematic diagram of the rotating tube structure of this utility model.

[0032] In the diagram: 1. Main body of the device; 2. Feed port; 3. Control panel; 4. First motor; 5. Second motor; 6. Drive sprocket; 7. Chain; 8. Rotary roller; 9. Driven sprocket; 10. Protective box; 11. Actuating disc; 12. Linkage rod; 13. Moisture rod; 14. Positioning block; 15. Moisture pipe; 16. Hot air blower; 17. Hot air pipe; 18. Guide plate; 19. Rotating shaft; 20. Feed roller; 21. Feed trough; 22. Air distribution pipe; 23. Toothed rod; 24. Rotating pipe; 25. Nozzle; 26. Dispersing rake; 27. Turning plow; 28. Guide block; 29. ​​Conveyor belt; 30. Drive synchronous pulley; 31. Synchronous belt; 32. Driven synchronous pulley; 33. Gear; 34. Rotary joint; 35. Storage bin. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0034] The embodiments of this utility model will be described below based on its overall structure.

[0035] Example 1: A raw material drying device for processing cling film, as shown in Figures 1-6, includes a main body 1. A maintenance door (not shown in the figures) is provided on the back of the main body for easy cleaning or maintenance of the interior. A feeding port 2 and a first motor 4 are respectively provided on one side of the top of the main body 1. A storage bin 35 is connected to the top of the feeding port 2. A feeding roller 20 is mounted inside the feeding port 2 via a rotating shaft 19. A feeding groove 21 is formed on the outer surface of the feeding roller 20. A lever is fixed at each end of the rotating shaft 19. The device consists of a moving disc 11 and a driven synchronous pulley 32. The output end of the first motor 4 is connected to a driving synchronous pulley 30, and a synchronous belt 31 meshes with the outer surfaces of the driving synchronous pulley 30 and the driven synchronous pulley 32. A linkage rod 12 is rotatably connected to the outer surface of the moving disc 11, and a movable rod 13 is hinged to one end of the linkage rod 12. A toothed rod 23 is fixed to the bottom end of the movable rod 13. A positioning block 14 is fixed to the top of the main body 1, and the movable rod 13 slides in conjunction with the positioning block 14. A hot air blower 16 is installed at the bottom of the main body 1. The outlet of the hot air blower 16 is connected to a distribution pipe 22 via a hot air pipe 17. The back of the distribution pipe 22 is connected to multiple sets of rotating pipes 24 via a rotary joint 34. The rotating pipes 24 are rotatably connected to the main body 1 via bearings. A gear 33 is fixed to one side of the outer surface of each set of rotating pipes 24, and the gear 33 meshes with a rack 23. Multiple nozzles 25 are fixed to the bottom of each set of rotating pipes 24. A turning plow 27 and a dispersing rake 26 are fixed inside the main body 1. Both the turning plow 27 and the dispersing rake 26... Two sets are provided, with the plow blades of the turning plow 27 having a spacing of 300mm and an inclination angle of 45°; the rake teeth of the dispersing rake 26 having a spacing of 30mm. The turning plow 27 can turn the raw material particles over, while the dispersing rake 26 can disperse the raw material particles. Combined with the oscillating hot air, it can achieve efficient penetration, significantly improving the uniformity and efficiency of drying. One side of the main body 1 of the device has a through-hole, and the inner side of the through-hole is fixed with a guide plate 18. Gravity guides the material to smoothly pass through the through-hole along the inclined surface and transfer it to the subsequent process, making the discharge more convenient.

[0036] Referring to Figures 1 and 2, in the above embodiment, multiple sets of rotating rollers 8 are installed inside the main body 1 of the device. A conveyor belt 29 is sleeved on the outer surface of the multiple sets of rotating rollers 8. One end of one set of rotating rollers 8 is fixed with a driven sprocket 9. A second motor 5 is installed on one side of the bottom of the main body 1. The output end of the second motor 5 is connected to a driving sprocket 6, and a chain 7 meshes with the outer surfaces of the driving sprocket 6 and the driven sprocket 9. The second motor 5 drives the corresponding rotating roller 8 to rotate through the meshing transmission of the driving sprocket 6, the chain 7 and the driven sprocket 9, thereby driving multiple sets of rotating rollers 8 to operate synchronously to transport materials. This design utilizes the high reliability and stability of the sprocket and chain 7 transmission to ensure that the conveyor belt 29 runs at a uniform speed, avoiding uneven accumulation of materials due to conveying fluctuations, and providing a stable material transport foundation for the subsequent drying process. Both the first motor 4 and the second motor 5 are installed with anti-loosening bolts to prevent vibration from causing the motor to loosen and affecting its stability.

[0037] Referring to Figure 2, in the above embodiment, a guide block 28 is fixed on one side of the inner side of the main body 1 of the device, and the top of the guide block 28 is inclined towards the conveyor belt. The particles unloaded by the feed roller 20 are guided by gravity to slide evenly down the inclined surface to the conveyor belt, providing a uniform material base for subsequent material turning, dispersion and hot air drying.

[0038] Referring to Figure 1, in the above embodiment, a control panel 3 is installed on the top side of the main body 1 of the device, and the first motor 4, the second motor 5 and the hot air blower 16 are all electrically connected to the control panel 3. The operator can adjust the feeding speed, the conveyor belt speed and the hot air parameters in real time through the panel. This design realizes centralized and digital control of the equipment operating parameters, significantly improves the ease of operation and adaptability to the production process, meets the flexible switching of different raw material moisture content and production capacity requirements, and realizes dynamic coordinated matching of the feeding roller 20 speed, the oscillation frequency of the rotating tube 24 and the speed of the conveyor belt 29.

[0039] Referring to Figure 2, in the above embodiment, the outer wall of the feeding roller 20 is in contact with the inner wall of the feeding port 2, and the outer surface of the feeding roller 20 is provided with a rubber layer. The slight contact between the rubber layer and the feeding port 2 can prevent the leakage of raw material particles.

[0040] Example 2: To protect the rack and gear, Example 2 is an improvement on Example 1. Referring to Figure 1, a protective box 10 is fixed above the outer surface of the main body 1 of the device, and the rack 23 and gear 33 are both located inside the protective box 10. The top of the protective box 10 has an opening for movement. The protective box 10 encloses and protects the rack 23 and gear 33, and allows the reciprocating motion of the movable rod 13 through the top opening, thereby preventing interference of the mechanical transmission components, avoiding accidental injury to personnel when swinging, and also playing a certain role in dust prevention.

[0041] Example 3: In order to facilitate the discharge of moisture and ensure drying efficiency, Example 2 is an improvement on Example 1. Referring to Figures 1-2, a moisture pipe 15 is passed through the top of the device. The moisture pipe 15 is used to discharge the hot and humid air generated during the drying process. The principle of hot air rising is used to achieve efficient discharge of moisture. This design can remove saturated humid air in time, maintain a dry environment inside the device, avoid moisture retention that affects drying efficiency, and prevent condensation from causing secondary pollution to polyethylene particles.

[0042] The implementation principle of this utility model is as follows: First, the operator inspects and lubricates the transmission components of the equipment. An appropriate amount of lubricating oil (such as lithium-based grease) is applied to the bearing positions of the driving synchronous pulley 30 and the driven synchronous pulley 32, the meshing points of the sprocket and chain 7, and the tooth contact areas of the gear 33 and the rack 23 to ensure smooth rotation of each transmission node, reduce mechanical wear, and lower operating noise. After maintenance, the operator pours polyethylene granules into the top storage silo 35 through the feeding port 2 for temporary storage. Based on the moisture content of the raw materials and production capacity requirements, the operator sets the speed of the first motor 4 (e.g., 20 rpm), the running speed of the second motor 5 transmission belt 29, and the hot air blower 1 via the control panel 3. 6. Hot air parameters: After starting the equipment, the first motor 4 drives the rotating shaft 19 to rotate the feeding roller 20 stably through the transmission system consisting of the active synchronous pulley 30, the synchronous belt 31, and the driven synchronous pulley 32. The three sets of feeding grooves 21 on the outer surface of the feeding roller 20 rotate with the roller body. There are three opportunities to align with the feeding port of the storage bin 35 every one rotation. The staff does not need to add materials manually frequently. The particles in the storage bin 35 fall into the grooves under the action of gravity and are unloaded when the feeding roller 20 rotates to the bottom. They are evenly spread on the conveyor belt 29. The actuating disk 11 at one end of the rotating shaft 19 rotates coaxially with the feeding roller 20. The eccentric pin on its surface pulls the movable rod through the linkage rod 12. 13 slides back and forth along the positioning block 14, and the toothed rod 23 at the bottom of the movable rod 13 moves linearly accordingly, meshing with the gear 33 outside the rotating tube 24. The driving gear 33 drives the rotating tube 24 and the bottom nozzle 25 to swing back and forth at a frequency of 20 times / minute at 60° (total swing angle 120°). When the particles move forward at a constant speed along the conveyor belt 29 (driven by the second motor 5 through the drive sprocket 6, chain 7, and driven sprocket 9), two sets of 45° inclined turning plows 27 first turn over the accumulated particles, and two sets of 30mm apart dispersing rakes 26 comb and level the material layer, increasing the porosity between particles. The hot air generated by the hot air blower 16 passes through the hot air pipe 17 and the air distribution pipe 22 from the swinging nozzle. The head 25 sprays out, thus fully evaporating the moisture in the granules. The hot and humid air is discharged in time through the top moisture pipe 15. The dried polyethylene granules are discharged to the next process through the guide plate 18. The humidity of the granules can be detected during discharge. If the humidity is higher than the specified requirement, it is determined that the drying is insufficient. The operator can increase the power of the hot air blower 16 by 10%-20% and at the same time instruct the second motor 5 to reduce the speed of the conveyor belt 29 to extend the residence time of the granules in the drying area. If the moisture content is >1.0%, the operator can reduce the feeding speed to 15 rpm and the conveyor belt speed to 0.3 m / s through the control panel 3, and increase the hot air temperature to 100℃.

[0043] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A raw material drying device for processing plastic wrap, comprising a main body (1), characterized in that: The top side of the main body (1) of the device is provided with a feeding port (2) and a first motor (4). The top of the feeding port (2) is connected to a storage bin (35). Inside the feeding port (2), a feeding roller (20) is installed through a rotating shaft (19). The outer surface of the feeding roller (20) is provided with a feeding groove (21). At both ends of the rotating shaft (19), a dial (11) and a driven synchronous wheel (32) are fixed respectively. The output end of the first motor (4) is connected to a driving synchronous wheel (30), and the outer surfaces of the driving synchronous wheel (30) and the driven synchronous wheel (32) are meshed with a synchronous belt (31). The outer surface of the dial (11) is rotatably connected to a linkage rod (12), and one end of the linkage rod (12) is hinged to a movable rod (13). The bottom end of the movable rod (13) is fixed with a The device body (1) is equipped with a toothed rod (23), a positioning block (14) is fixed on the top of the device body (1), and the movable rod (13) slides with the positioning block (14). A hot air blower (16) is installed at the bottom of the device body (1). The air outlet of the hot air blower (16) is connected to a distribution pipe (22) through a hot air pipe (17). The back of the distribution pipe (22) is connected to multiple sets of rotating pipes (24) through a rotary joint (34). The rotating pipes (24) are rotatably connected to the device body (1) through bearings. A gear (33) is fixed on one side of the outer surface of the multiple sets of rotating pipes (24), and the gear (33) meshes with the toothed rod (23). Multiple sets of nozzles (25) are fixed at the bottom of the multiple sets of rotating pipes (24). A turning plow (27) and a dispersing rake (26) are fixed inside the device body (1).

2. The raw material drying device for fresh-keeping film processing according to claim 1, characterized in that: The device body (1) has multiple sets of rotating rollers (8) installed inside. The outer surfaces of the multiple sets of rotating rollers (8) are fitted with a conveyor belt (29). One end of one set of rotating rollers (8) is fixed with a driven sprocket (9). A second motor (5) is installed on one side of the bottom of the device body (1). The output end of the second motor (5) is connected to a drive sprocket (6), and the outer surfaces of the drive sprocket (6) and the driven sprocket (9) are meshed with a chain (7).

3. The raw material drying device for fresh-keeping film processing according to claim 1, characterized in that: A guide block (28) is fixed inside one side of the main body (1) of the device, and the top of the guide block (28) is inclined towards the conveyor belt.

4. The raw material drying device for fresh-keeping film processing according to claim 1, characterized in that: The main body (1) of the device has a through-hole on one side, and a guide plate (18) is fixed inside the through-hole.

5. The raw material drying device for fresh-keeping film processing according to claim 2, characterized in that: A control panel (3) is installed on one side of the top of the main body (1) of the device, and the first motor (4), the second motor (5) and the hot air blower (16) are all electrically connected to the control panel (3).

6. The raw material drying device for processing cling film according to claim 1, characterized in that: A protective box (10) is fixed above the outer surface of the main body (1) of the device, and the rack (23) and gear (33) are both located inside the protective box (10). The top of the protective box (10) has an opening.

7. The raw material drying device for fresh-keeping film processing according to claim 1, characterized in that: A moisture pipe (15) runs through the top of the device.

8. The raw material drying device for fresh-keeping film processing according to claim 1, characterized in that: The outer wall of the feeding roller (20) is in contact with the inner wall of the feeding port (2), and the outer surface of the feeding roller (20) is provided with a rubber layer.

9. The raw material drying device for fresh-keeping film processing according to claim 1, characterized in that: The turning plow (27) and the dispersing rake (26) are each provided in two sets, and the plow blade spacing of the turning plow (27) is 300mm and the inclination angle is 45°; the rake tooth spacing of the dispersing rake (26) is 30mm.

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