An on-line waste crushing and melting granulation integrated device for preservative film production

Abstract

The application relates to the technical field of preservative film production, and discloses a waste on-line crushing and melting granulation integrated device for preservative film production, which comprises a base, a main integrated material bin is fixedly installed at the top of the base, a collecting box is fixedly installed above the main integrated material bin, a feeding bag is arranged on one side of the collecting box, a hopper is arranged on the inner side of the main integrated material bin, a guide block is slidably connected above the hopper, a rotating strip is rotatably arranged on one side of the guide block, and a plug rod is rotatably connected in the rotating strip. The closed integrated system is used to save the intermediate transportation and storage link, the quality of the regenerated material is guaranteed from the source, the mechanical compaction, the spray humidification and the pulse purging are combined to ensure the continuous and stable feeding, the core rod, the limiting rod and the exhaust filtering design are finally matched, the regenerated material with uniform particles and high purity is output, the preservative film waste fragments are further promoted to fall down, the bridging obstruction is reduced, and the production quality of the whole preservative film is improved.

Description

Technical Field

[0001] This invention relates to the field of food preservation film production technology, specifically to an integrated device for online crushing and melting granulation of waste materials used in food preservation film production. Background Technology

[0002] Plastic wrap, widely used in food preservation and daily necessities packaging, has a huge consumption volume. During the continuous production process of plastic wrap, a large amount of scrap material and substandard film products are inevitably generated. These are mainly divided into two categories: lightweight and soft film-like waste. This waste is essentially valuable thermoplastic raw material. The main treatment method involves collecting and packaging the production waste, transporting it to specialized plastic recycling and granulation companies, where a crusher breaks the waste film into irregular flakes. The crushed material is then fed into a separate granulator for melting, extrusion, and pelletizing. However, some inherent defects still exist during use:

[0003] For example, the quality of recycled materials cannot be guaranteed during use. Waste materials are easily contaminated and oxidized during collection, packaging, and transportation, resulting in yellowing, impurities, and molecular weight degradation of the recycled materials obtained from downstream recycling and granulation. The performance is unstable, and when used in the production of high-transparency cling film, it can only be mixed in a very low proportion, which affects the high value of recycling. In addition, when lightweight and fluffy broken film sheets are fed into a single-screw granulator, problems such as bridging and roller wrapping are very likely to occur, affecting the stability of extruder melt plasticization. Ultimately, this leads to uneven particle size and poor plasticization, affecting the quality of recycled materials. Therefore, there is still room for improvement in waste treatment. Summary of the Invention

[0004] This invention provides an integrated online crushing, melting, and granulation device for waste materials used in the production of cling film. Through a sealed, integrated design, it ensures continuous online processing of cling film waste fragments into recycled granules, effectively preventing bridging and adhesion of materials during transportation. It also compresses, melts, degasses, and finally granulates the pre-treated materials, solving problems such as uneven feeding.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] In a first aspect, an integrated online crushing and melting granulation device for waste materials used in the production of cling film is provided, comprising: a base, a main integrated material hopper fixedly installed on the top of the base, a collection box fixedly installed above the main integrated material hopper, a feeding bag provided on one side of the collection box, a hopper provided inside the main integrated material hopper, a guide block slidably connected above the hopper, a rotating bar rotatably installed on one side of the guide block, an insert rod rotatably connected to the inner shaft of the rotating bar, a rotating roller provided on the outer side of the insert rod, and an integrated material hopper provided below the hopper.

[0007] The crushing section, located below the hopper, is used for the initial crushing and guiding of plastic wrap waste fragments;

[0008] The crushing section includes a guide and an adjusting component. The guide is disposed inside the integrated silo and connected to the adjusting component. The guide is located on the inner bottom wall of the integrated silo.

[0009] The unblocking section is located above and in the middle of the outside of the integrated silo, and prevents material bridging and adhesion through spray and pulsed airflow;

[0010] The unblocking unit includes a spray component and a pulse component. The spray component is located above the outside of the integrated hopper. The spray component and the pulse component are connected. The pulse component is disposed through the outside of the integrated hopper.

[0011] The melting and granulation section is located below the integrated silo and performs melting, compression, degassing and granulation on the crushed material.

[0012] The melting and granulation section includes a push bar and a granulation component. The push bar is located below the integrated silo and is connected to the granulation component. The granulation component is penetrated by the integrated silo and is perpendicular to the integrated silo.

[0013] Furthermore, the guide includes:

[0014] Guide shafts are installed inside the integrated silo.

[0015] Furthermore, the guide also includes:

[0016] The small screw is located on the outside of the guide bar;

[0017] The screw blade is located on the outside of the small screw.

[0018] Furthermore, the adjusting member includes:

[0019] There are two rotating shafts, which are symmetrically arranged inside the integrated silo.

[0020] The pressure rollers are two in number and are symmetrically arranged on the outside of the rotating shaft.

[0021] Furthermore, the spraying component includes:

[0022] Atomizing humidifier is installed on the outside of the integrated silo;

[0023] The spray nozzle is positioned on one side of the atomizing humidifier.

[0024] There are multiple nozzles, and they are located on one side of the spray body.

[0025] Furthermore, the pulse element includes:

[0026] The pulse generator is fixedly installed on the outside of the integrated silo.

[0027] The conduit is fixedly installed below the pulse generator;

[0028] The central controller is located above the pulse generator;

[0029] The scraping parts are located on the lower part of the inner wall of the integrated silo.

[0030] Furthermore, the scraping component includes:

[0031] The mounting frame is installed on the inner wall of the integrated silo.

[0032] The spring is fixedly installed on one side of the mounting frame;

[0033] The scraper is located at the top of the spring.

[0034] Furthermore, the toggle bar includes:

[0035] The twin-screw extruder is installed through the bottom of the integrated silo;

[0036] There are two limit rods, which are rotatably mounted on the inner wall of the twin-screw extruder.

[0037] Furthermore, the toggle bar also includes:

[0038] The core rod consists of two rods, both of which are fixedly installed on the outside of the limiting rod.

[0039] The core rod is installed through the twin-screw extruder.

[0040] Furthermore, the granulation component includes:

[0041] The screening and filtering plate is located outside the limiting rod and on the inner wall of the twin-screw extruder.

[0042] Sheared compound blocks, multiple in number, are all fixedly installed on the outside of the core rod;

[0043] Rotary threads are formed on the outside of the core rod;

[0044] The spiral pattern of the rotating thread is denser at one end and sparser at the other, and is coarser at one end and thinner at the other.

[0045] The above-described solution of the present invention has at least the following beneficial effects:

[0046] By eliminating intermediate transportation and storage links through a closed integrated system, the quality of recycled materials is guaranteed from the source. Then, by combining mechanical compaction, spray humidification and pulse purging, the feeding is ensured to be continuous and stable. Finally, with the core rod, limit rod and exhaust filter design, the recycled materials with uniform particles and high purity are produced, which promotes the falling of plastic wrap waste fragments, reduces the obstruction of bridging and improves the overall production quality of plastic wrap. Attached Figure Description

[0047] The invention will now be further described with reference to the accompanying drawings.

[0048] Figure 1 This is a schematic diagram of the overall three-dimensional structure provided in an embodiment of the present invention;

[0049] Figure 2 A three-dimensional structural diagram of the combination of collection box, feed bag, hopper and guide block is provided for embodiments of the present invention;

[0050] Figure 3 A three-dimensional schematic diagram of the combination of the insertion rod, the rotating roller, and the rotating bar is provided for the embodiments of the present invention;

[0051] Figure 4 This is a schematic diagram of the interior of the processing box provided by an embodiment of the present invention, which includes a twin-screw extrusion box, a limiting rod, and a core rod.

[0052] Figure 5 This is provided by the embodiments of the present invention. Figure 4 Enlarged structural diagram of a local part at point C;

[0053] Figure 6 This is a schematic diagram of the integrated hopper, nozzle, central controller, and pulse generator combination structure provided in an embodiment of the present invention;

[0054] Figure 7 This is a three-dimensional schematic diagram of the conduit, mounting frame, and spring assembly structure provided in an embodiment of the present invention;

[0055] Figure 8 This is a schematic diagram of the combined structure of the spray body, nozzle, and atomizing humidifier provided in an embodiment of the present invention;

[0056] Figure 9 This is a schematic diagram of the combined structure of the core rod, shearing compound block, and rotating thread provided in an embodiment of the present invention.

[0057] In the diagram: 1. Base; 2. Main integrated silo; 3. Collection box; 4. Feed bag; 5. Buckle; 6. Hopper; 7. Guide block; 8. Rotary roller; 9. Rotating bar; 10. Insert rod; 14. Integrated silo; 15. Rotating shaft; 16. Pressure roller; 17. Guide bar; 18. Small screw; 19. Screw blade; 20. Twin-screw extruder; 21. Limiting rod; 22. Core rod; 23. Sheared compound block; 24. Rotating thread; 25. Atomizing humidifier; 26. Spray body; 27. Nozzle; 28. Central controller; 29. ​​Pulse generator; 30. Conduit; 31. Mounting frame; 32. Spring; 33. Scraper; 34. Screening filter plate. Detailed Implementation

[0058] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0059] like Figures 1 to 9 As shown, an integrated online crushing and melting granulation device for waste materials used in the production of cling film includes: a base 1, a main integrated material bin 2 fixedly installed on the top of the base 1, a collection box 3 fixedly installed above the main integrated material bin 2, a feeding bag 4 provided on one side of the collection box 3, a hopper 6 provided inside the main integrated material bin 2, a guide block 7 slidably connected above the hopper 6, a rotating bar 9 rotatably installed on one side of the guide block 7, an insert rod 10 rotatably connected to the inner shaft of the rotating bar 9, a rotating roller 8 provided on the outer side of the insert rod 10, and an integrated material bin 14 provided below the hopper 6.

[0060] The crushing section, located below the hopper 6, is used for the preliminary crushing and guiding of the plastic wrap waste fragments;

[0061] The crushing section includes a guide and an adjusting component. The guide is located inside the integrated silo 14 and is connected to the adjusting component. The guide is located on the inner bottom wall of the integrated silo 14.

[0062] The unblocking section is located above and in the middle of the outer side of the integrated silo 14. It prevents material bridging and adhesion through spray and pulse airflow, and conveys the plastic wrap waste fragments downward.

[0063] The unblocking unit includes a spray component and a pulse component. The spray component is located above the outside of the integrated silo 14. The spray component and the pulse component are connected. The pulse component is installed through the outside of the integrated silo 14.

[0064] The melting and granulation section is located below the integrated silo 14, and performs melting, compression, degassing and granulation on the crushed material;

[0065] The melting and granulation section includes a push bar and a granulating component. The push bar is located below the integrated hopper 14 and is connected to the granulating component. The granulating component is penetrated by the integrated hopper 14 and is perpendicular to the integrated hopper 14.

[0066] Specifically, the integrated hopper 14 is located between the hopper 6 and the twin-screw extruder 20, forming a sealed shape between the discharge port and the lower inlet; the equipment is equipped with a master control switch for overall control of the equipment; one end of the insertion rod 10 is equipped with a servo motor and connected to the output end of the servo motor; the hopper 6 is equipped with a slide corresponding to the guide block 7; the buckle 5 on the outside of the collection box 3 facilitates the release and handling of the guide block 7;

[0067] In practical application, the servo motor is first driven by the master control switch, and the insertion rod 10 is energized and rotates. The material fragments used to process the cling film are put into the inside of the feeding bag 4. After the material enters the collection box 3, it falls above the hopper 6. At this time, the guide block 7 is driven, and the guide block 7 disengages from the buckle 5 and moves towards the rotating bar 9. The fragments between the guide block 7 and the rotating bar 9 are collided and broken. After being broken, they fall down the bottom of the hopper 6 into the integrated material bin 14. In the integrated material bin 14, under the action of rotational power, the cling film waste fragments are put into the twin-screw extruder 20. In the channel of the twin-screw extruder 20, the material fragments are initially compressed and conveyed. The rotation of the twin-screw extruder 20 melts and granulates the physical fragments of the cling film. Finally, after being conveyed, they are discharged from the vacuum port at the other end, thus completing the integrated processing.

[0068] like Figure 4 , Figure 5 , Figure 6 As shown, the guide includes:

[0069] Guide shaft 17 is installed inside the integrated hopper 14;

[0070] The small screw 18 is located on the outside of the guide bar 17;

[0071] The screw blade 19 is located on the outside of the small screw 18.

[0072] The adjusting components include:

[0073] There are two rotating shafts 15, which are symmetrically arranged inside the integrated hopper 14;

[0074] The pressure rollers 16 are two in number and are symmetrically arranged on the outside of the rotating shaft 15.

[0075] Specifically, the integrated silo 14 is a completely enclosed integrated silo with a specific slope, directly connected to the hopper 6. It is used to prevent materials from being exposed to air during transportation and temporary storage, fundamentally eliminating pollution from external dust and moisture, and minimizing the residence time of materials in high-temperature environments, thus slowing down thermo-oxidative aging. The twin-screw extruder 20 uses an extruder with a large length-to-diameter ratio and a high compression ratio as the core of melt granulation. In the screw structure, there are sections with reverse thread combinations. The rotating shaft 15 is rotatably installed on both sides of the integrated silo 14, and one end is connected to a direct drive motor. One end of the guide shaft 17 is equipped with an external motor and is connected to the external motor. The pressure roller 16 is provided with textures to facilitate the conveying of fragments. The guide shaft 17 is used to support the small screw 18. Since the plastic wrap waste fragments are relatively soft and prone to entanglement or bridging, the screw blade 19 is used to move the plastic wrap waste fragments to facilitate downward conveying.

[0076] In practical applications, the rotating shaft 15 and the integrated hopper 14 are turned on by the main control switch. After the plastic wrap waste fragments enter the integrated hopper 14, the rotating shaft 15 will first contact the plastic wrap material fragments and create friction, which facilitates the accelerated downward conveying. After falling to the bottom, the light and broken film pieces are compacted into a dense material flow that can be easily grabbed by the small screw 18 and come into contact with the screw blade 19. The screw blade 19 continuously grabs the loose broken film pieces from the bottom of the integrated hopper 14 to prevent bridging. This transforms the intermittent feeding, which is prone to bridging and interruption, into a constant and uniform continuous feeding, thereby solving the looseness problem inside the integrated hopper 14 and turning the waiting process into an active feeding process. This eliminates the blockage of the feed inlet from the root and ensures that the material fragments are conveyed quickly.

[0077] like Figure 6 , Figure 7 , Figure 8 As shown, the spray component includes:

[0078] Atomizing humidifier 25 is installed on the outside of the integrated silo 14;

[0079] The spray body 26 is positioned on one side of the atomizing humidifier 25;

[0080] There are multiple nozzles 27, which are located on one side of the spray body 26.

[0081] The pulse device includes:

[0082] Pulse generator 29 is fixedly installed on the outside of integrated silo 14;

[0083] The conduit 30 is fixedly installed below the pulser 29;

[0084] The central controller 28 is positioned above the pulser 29;

[0085] The scraping component, located below the inner wall of the integrated hopper 14, is used to scrape material fragments through a reliable mechanical structure.

[0086] Specifically, the atomizing humidifier 25 consists of a precision metering pump, a storage tank, atomizing nozzles, and a solenoid valve. The solenoid valve controls the on / off state of the pipeline; the nozzle 27 is a micron-level atomizing nozzle that can precisely spray a very small amount of water mist or food-grade antistatic agent, facilitating the internal processing of plastic wrap waste fragments; the conduit 30 is used to guide the pulsed airflow; the central controller 28 is used to connect the spray element and the pulse element, facilitating online monitoring of signals and spray volume, and conveniently combining processing states; the spray body 26 internally stores water mist for humidification; the pulser 29 facilitates the storage and regulation of airflow, etc.; the pulser 29 internally consists of a compressed air source, high-pressure pipeline, pulse solenoid valve, and nozzles; the integrated hopper 14 is equipped with a torque sensor, a hopper level sensor, and status indicator lights. The torque sensor is used to feedback the viscosity and load of the material fragments; the hopper level sensor is used to sense the material status; the status indicator lights directly obtain signals such as the start / stop of the main unit and the screw speed;

[0087] During implementation, under high pressure, the plastic wrap waste fragments will form a dense lining with strong adhesion to the metal surface, which may still be difficult to detach on its own. These residues will harden and degrade over time, contaminating subsequent materials, affecting feeding accuracy, and even clogging the equipment. Therefore, when the plastic wrap material fragments enter the integrated hopper 14, during short-term shutdowns or material changes, compressed air can be manually or automatically connected for short-term, high-pressure pulse purging to blow the scattered residues scraped off by the scraper 33 into the twin-screw extruder 20. Turn on the main control switch and use the atomizing humidifier 25. After the atomizing humidifier 25 is working, it acts on the water mist in the spray body 26 and sprays it out through the nozzle 27 onto the plastic wrap waste fragments that pass by, slightly increasing the weight and humidity of the material, fundamentally solving the problem of scattering. Under the action of gravity and humidity, the forced feeding efficiency of the subsequent small screw 18 is improved. Then, the pulser 29 works to spray pulse gas through the conduit 30 into the plastic wrap waste fragments that pass by, so that the plastic wrap waste fragments fall down, accelerate collection, and reduce bridging obstacles.

[0088] Using atomization alone may cause material caking due to residual moisture when the machine is shut down. Therefore, the online processing function of atomization is integrated with the shutdown cleaning function of pulse air blowing into a complete combination.

[0089] When the pulse air blower stops, it takes advantage of the fact that the material has been moistened. The powerful airflow can thoroughly remove the dust and slightly caking material that have increased in weight due to moisture and are easier to blow away, achieving the effect of wet cleaning, which is better than the cleaning of dry powder.

[0090] When the system is online, the atomizing device acts as a preventative unit to prevent dust and adhesion. When the system is shut down, the pulse air blowing unit acts as a treatment and recovery unit to perform cleaning and drying tasks. By combining these functions, intelligent management of the entire production and maintenance cycle of the equipment can be achieved, ensuring that each shutdown is a minor maintenance and preventing any material from remaining, hardening, or degrading in the system for a long time, thereby contaminating the next batch of raw materials.

[0091] like Figures 6 to 7 As shown, the scraping parts include:

[0092] Mounting frame 31 is set on the inner wall of integrated silo 14;

[0093] Spring 32 is fixedly installed on one side of mounting frame 31;

[0094] The scraper 33 is located at the top of the spring 32.

[0095] Specifically, the scraper 33 is installed at the bottom of the inner wall of the integrated hopper 14. The shape of the scraper 33 is precisely matched with the root contour of the small screw 18, like a comb, which makes it easy to scrape off the flexible material. The scraper 33 is not completely rigidly fixed, but is provided with a continuous and finely adjustable clamping force by the spring 32 behind it, so that its cutting edge always keeps in close contact with the root of the screw.

[0096] In practical applications, when the small screw 18 rotates, the root of each thread will come into contact with the scraper 33 when it passes the discharge port. Through the cooperation of the scraper 33, the small screw 18, and the screw blade 19, the fragments of the plastic wrap material are thoroughly cleaned away. Then, the material is scraped by the fixed scraper 33 to complete further cleaning.

[0097] like Figure 2 , Figure 4 , Figure 9 As shown, the toggle bar includes:

[0098] The twin-screw extruder 20 is disposed below the integrated hopper 14;

[0099] There are two limit rods 21, which are rotatably mounted on the inner wall of the twin-screw extruder 20.

[0100] The toggle bar also includes:

[0101] The core rod 22 has two parts, both of which are fixedly installed on the outside of the limiting rod 21;

[0102] The core rod 22 is set through the twin-screw extruder 20.

[0103] Granulation components include:

[0104] The screening and filtering plate 34 is set outside the limiting rod 21 and located on the inner wall of the twin-screw extruder 20;

[0105] Multiple sheared compound blocks 23 are fixedly installed on the outside of the core rod 22;

[0106] Rotary thread 24 is formed on the outside of core rod 22;

[0107] The spiral pattern of the rotating thread 24 is denser at one end and sparser at the other, and is coarser at one end and finer at the other.

[0108] Specifically, the twin-screw extruder 20 is equipped with a high-precision melt pressure sensor installed in front of the extruder die, which monitors the torque of the main motor and transmits the pressure and torque signals to the PLC. When the signal indicates that the melt viscosity is too high, the PLC automatically adjusts the cooling water flow rate and cutter speed of the circulating water die-face hot pelletizing device to achieve stronger cooling and faster cutting, and vice versa. The twin-screw extruder 20 upgrades the traditional open-loop pelletizing to closed-loop feedback intelligent pelletizing, ensuring that high-quality pellets with uniform size and regular appearance can be produced under different melt conditions. After the melting section of the main twin-screw extruder, at least two vacuum exhaust ports are provided. The first is used to remove most of the air and volatiles, and the second is used for deep volatilization. The screening filter plate 34 is provided with a large number of holes and grooves to adjust the uniformity of the particles. The shearing compound block 23 is used to compress the plastic wrap waste fragments into a compact shape. After the plastic wrap waste fragments enter the twin-screw extrusion box 20, the rotating screw 24 gradually compresses the loose fragments into a dense solid block from sparse to dense, and then heats and melts them. This makes the melting more uniform and eliminates any unmelted particles.

[0109] In practical applications, the core rod 22 is driven to rotate. After the core rod 22 rotates, it drives the shearing and mixing block 23 and the rotating thread 24 to work. The limiting rod 21 comes into contact with the plastic wrap waste fragments, slowly conveying the material and gradually compressing it. Under the action of the shearing and mixing block 23, the plastic wrap waste fragments are pressed into cotton balls, and then heated to 120-180℃ to melt. At the same time, air and gas are sucked away. The clean molten plastic generated after processing is extruded into thin strips through the screening and filtering plate 34. After the thin strips are cooled, they are cut into small particles. These particles are clean and uniform and can be directly used to make new high-end plastic wrap.

[0110] Working principle: The operator puts the plastic wrap waste fragments generated by the production line into the device through the feed bag 4. The waste first enters the collection box 3 for temporary storage.

[0111] The hopper 6, located inside the main integrated silo 2, receives waste material falling from the collection box 3. After the equipment is started, the insertion rod 10 rotates under the drive of the servo motor, driving the rotating bar 9 connected to it. At the same time, the control guide block 7 is released from the latch 5 and slides along the slide on the hopper 6 towards the rotating bar 9. The waste material between the guide block 7 and the rotating bar 9 collides and shears, completing the initial crushing. The waste fragments after the initial crushing fall below the hopper 6 under the action of gravity and enter the completely sealed integrated silo 14, thereby isolating air and preventing pollution and oxidation.

[0112] During the conveying and unblocking process, the loose waste fragments entering the integrated silo 14 first encounter two pressure rollers 16 driven by the rotating shaft 15. The pressure rollers 16 rotate in opposite directions, conveying the material downwards through friction and initially compacting it, thus breaking any potential bridging structures. The compacted material continues to fall to the bottom of the integrated silo 14. At this point, the small screw 18, supported by the guide shaft 17, begins to operate. The screw blades 19 on the outside of the small screw 18 rotate continuously, actively "grabbing" the loose, broken film from the bottom of the silo, transforming it into a dense, continuous material flow, achieving forced and uniform feeding, and fundamentally preventing blockage at the inlet. To assist in conveying and prevent electrostatic adhesion, the spray unit of the unblocking section begins to operate. The atomizing humidifier 25 atomizes the water or antistatic agent in the spray body 26 and precisely sprays it onto the material in the integrated silo 14 through multiple nozzles 27. This slightly increases the weight and humidity of the material, solves the problem of dispersion, and improves the subsequent gripping efficiency of the small screw 18.

[0113] During the online cleaning process, the pulser 29 of the pulse unit, under the instruction of the central controller 28, can inject short-term, high-pressure pulse airflow into the chamber through the conduit 30 to blow away materials that may adhere to the chamber wall and ensure smooth flow path.

[0114] During short shutdowns or material changes, the pulse air blowing function is activated again. At this time, taking advantage of the material being wetted by the spray nozzle, the powerful pulse airflow can more effectively remove the scattered residues scraped off by the scraping parts and the slightly clumped material, blowing them into the twin-screw extruder 20, thus realizing intelligent management of the entire production and maintenance cycle of the equipment.

[0115] While the small screw 18 rotates to feed material, the scraping parts located below the inner wall of the integrated hopper 14 continue to work. Under the continuous clamping force provided by the spring 32, the cutting edge of the scraper 33 always maintains close contact with the root contour of the small screw 18. When the small screw 18 rotates, the scraper 33, like a comb, thoroughly scrapes and cleans away the flexible material wrapped or adhered to the root of its threads and the screw blade 19, ensuring the purity and efficiency of the conveying process.

[0116] During the conveying and compression process, the dense material flow processed by the integrated silo 14 enters the twin-screw extruder 20, where the two core rods 22 are driven to rotate in opposite directions by the limiting rods 21. The rotating threads 24 on the outer side of the core rods 22 adopt a special design with one end being sparser and the other denser. During the conveying process of the rotating threads 24, the material is gradually compressed from the loose space at the feed end to the tight space at the discharge end, completing the transformation of its physical state. As the material is conveyed and compressed, the temperature is raised to 120-180℃ by an external heating system. The material begins to melt during this process, and multiple shearing and mixing blocks 23 installed on the core rods 22 apply strong shearing and mixing action to the molten plastic, breaking up unmelted particles, homogenizing the melt composition and temperature, and ensuring good plasticization.

[0117] During the degassing and purification process, after the melting section, the device is equipped with at least two vacuum exhaust ports. The first is used to remove most of the air and volatiles carried in the material, and the second is used for deep devolatilization to remove small molecule impurities. The fully plasticized and devolatilized pure molten plastic is driven by the core rod 22 and passes through a screening filter plate 34 located at the outlet end of the twin-screw extruder 20. The screening filter plate 34 filters out any possible minute impurities and forces the melt to form multiple uniform thin strips. After cooling, the extruded thin strips are cut into high-quality recycled plastic granules of uniform size and regular appearance by a high-speed pelletizing device. These granules are clean and transparent and can be directly used in the production of new high-end food preservation films.

[0118] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An on-line waste crushing and melt granulation integrated device for preservative film production, comprising: The base (1) is provided with a main integrated bin (2) fixedly installed on the top, a collecting box (3) fixedly installed above the main integrated bin (2), an inlet bag (4) arranged on one side of the collecting box (3), a hopper (6) arranged on the inner side of the main integrated bin (2), a guide block (7) slidably connected above the hopper (6), a rotating strip (9) rotatably arranged on one side of the guide block (7), a buckle (5) arranged on the outer side of the collecting box (3) for releasing the guide block (7), the guide block (7) moving from the buckle (5) to the direction of the rotating strip (9), the fragments between the guide block (7) and the rotating strip (9) being broken by collision, a plug rod (10) rotatably connected to the inner shaft of the rotating strip (9), a rotating roller (8) arranged on the outer side of the plug rod (10), and an integrated bin (14) arranged below the hopper (6). The crushing part is arranged below the hopper (6) and is used for preliminarily crushing and guiding the fresh-keeping film waste fragments. The crushing part comprises a guide member and an adjusting member, the guide member is arranged on the inner side of the integrated bin (14), the guide member is connected with the adjusting member, and the guide member is located on the inner bottom wall of the integrated bin (14). The dredging part is arranged above and in the middle of the outer side of the integrated bin (14) and prevents the bridging and adhesion of the materials by spraying and pulse airflow. The dredging part comprises a spraying member and a pulse member, the spraying member is arranged above the outer side of the integrated bin (14), the spraying member is connected with the pulse member, and the pulse member is arranged through the outer side of the integrated bin (14). The melting and granulating part is arranged below the integrated bin (14) and is used for melting, compressing, exhausting and granulating the crushed materials. The melting and granulating part comprises a shifting strip and a granulating member, the shifting strip is arranged below the integrated bin (14), the shifting strip is connected with the granulating member, the granulating member is arranged through the integrated bin (14) and is in a vertical state with the integrated bin (14). The guide member comprises: a guide shaft strip (17) arranged in the interior of the integrated bin (14); a small screw rod (18) arranged on the outer side of the guide shaft strip (17); a screw blade (19) arranged on the outer side of the small screw rod (18). The adjusting member comprises: two rotating shafts (15) symmetrically arranged in the interior of the integrated bin (14); two compression rollers (16) symmetrically arranged on the outer side of the rotating shafts (15).

2. The online waste crushing and melting granulation integrated device for preservative film production according to claim 1, characterized in that: The spraying member comprises: an atomizing humidifier (25) arranged on the outer side of the integrated bin (14); a spraying body (26) arranged on one side of the atomizing humidifier (25); a plurality of nozzles (27) arranged on one side of the spraying body (26).

3. The online waste crushing and melting granulation integrated device for preservative film production according to claim 1, characterized in that: The pulse member comprises: a pulse device (29) fixedly installed on the outer side of the integrated bin (14); a conduit (30) fixedly installed below the pulse device (29); a central controller (28) arranged above the pulse device (29); a scraping part arranged below the inner wall of the integrated bin (14).

4. The online waste crushing and melting granulating integrated device for preservative film production according to claim 3, characterized in that: The scraping part comprises: an installation frame (31) arranged on the inner wall of the integrated bin (14). A spring (32) is fixedly installed on one side of the mounting frame (31); A scraper (33) is arranged at the top end of the spring (32).

5. The online waste crushing and melting granulation integrated device for preservative film production according to claim 1, characterized in that: The poking bar comprises: A double-screw extrusion box (20) is arranged through the lower part of the integrated bin (14); Two limiting rods (21) are arranged on the inner wall of the double-screw extrusion box (20).

6. The waste on-line crushing and melting granulating integrated device for preservative film production according to claim 5, characterized in that: The poking bar further comprises: Two core rods (22) are fixedly installed on the outer side of the limiting rod (21); The core rod (22) is arranged through the double-screw extrusion box (20).

7. The waste on-line crushing and melting granulating integrated device for preservative film production according to claim 6, characterized in that: The granulating part comprises: A screening filter plate (34) is arranged on the outer side of the limiting rod (21) and located on the inner wall of the double-screw extrusion box (20); A plurality of shearing and mixing blocks (23) are fixedly installed on the outer side of the core rod (22); A rotating thread (24) is arranged on the outer side of the core rod (22); The spiral thread of the rotating thread (24) is denser at one end and sparser at the other end, and thicker at one end and thinner at the other end.

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