A melting device for a waste plastic recycling production line

Abstract

This invention discloses a melting device for a waste plastic recycling production line, belonging to the field of plastic recycling technology. It includes a base with a melting tank on its top surface and a discharge pipe at its bottom. By incorporating a separation component, this design allows for the following separation: as the waste plastic falls onto the receiving tray, the lower-melting-point plastic melts first due to heating. Simultaneously, guided by a guide plate, airflow agitates the molten plastic, facilitating the flow of the already melted lower-melting-point plastic. This achieves separation between the lower-melting-point and higher-melting-point plastics. Furthermore, by rotating the fixed ring and the receiving hopper, the receiving hopper can be moved to a suitable position, allowing the falling molten plastic to flow into the conveying ring and be discharged, reducing its proportion within the tank.

Description

Technical Field

[0001] This invention belongs to the field of plastic recycling technology, and particularly relates to a melting device for a waste plastic recycling production line. Background Technology

[0002] Plastic is a common recyclable material in daily life. Recycling waste plastic can reduce environmental pollution, save raw resources, reduce energy consumption and carbon emissions, and transform waste plastic into products such as recycled pellets through physical or chemical methods, thereby turning waste into treasure, creating economic value, and reducing production costs.

[0003] In the process of recycling waste plastics by melting them, the waste plastics contain plastics with different melting points, which causes them to melt at different rates, thus affecting the overall melting rate. Furthermore, plastics with different melting points are not easy to mix together after melting, which will have a certain impact on the quality of the recycled material and lead to a reduction in the quality of the recycled plastics. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that the melting rate is affected by the presence of plastics with different melting points in waste plastics, and that the quality of recycled plastics is affected by the difficulty in mixing plastics with different melting points. Therefore, this invention proposes a melting device for a waste plastic recycling production line.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a melting device for a waste plastic recycling production line, comprising a base, a melting tank on the top surface of the base, and a discharge pipe at the bottom end of the base, the discharge pipe being connected to the melting tank, and further comprising: A separation assembly, the separation assembly including a blower installed on the outer wall of the melting tank, and the blower outlet penetrating through the opening in the outer wall of the melting tank; A fixing ring is installed on the inner wall of the melting tank, and one side of the fixing ring has an opening corresponding to the air outlet of the blower, and the air outlet side of the blower is tangent to the inner ring of the fixing ring. A receiving tray is located at the center of the melting tank. A connecting plate is installed on the outer wall of the receiving tray and is fixedly connected to the inner wall of the melting tank. The feeding assembly includes a mounting cover installed at the top of the melting tank, a housing installed at the top of the mounting cover, a feeding pipe provided on the outer wall of the housing, and a screw conveyor provided inside the feeding pipe.

[0006] As a further description of the above technical solution: The separation assembly further includes: a support frame, which is installed on the inner wall of the fixed ring, and a guide plate is installed at the bottom end of the support frame. The guide plate has an included angle and an inclined plate is provided at the bottom end of the guide plate. The guide plate is located above the receiving tray. A heating plate, wherein the heating plate is installed above the receiving tray and multiple heating plates are arranged circumferentially; The mounting ring is rotatably mounted at the bottom of the receiving tray, and a grid is mounted on the top of the mounting ring, with the gap between the grid and the heating plate corresponding to each other.

[0007] As a further description of the above technical solution: The separation component further includes: a receiving hopper, which is installed on the outer wall of the mounting ring, and multiple receiving hoppers are arranged circumferentially, and the receiving hoppers correspond to the connecting plate and are located at the bottom of the connecting plate; and the melting tank has an opening inside that corresponds to the position of the grid bar, and the size of the opening is the same as that of the receiving hopper. The conveying ring is sleeved on the outer wall of the melting tank, and the bottom end of the conveying ring is inclined to one side. The conveying ring has an opening inside that corresponds to the opening of the melting tank, and the bottom end of the conveying ring is connected to a discharge pipe.

[0008] As a further description of the above technical solution: The separation assembly further includes a connecting rod, which is installed at the bottom of the receiving hopper and is slidably connected to the melting tank through a groove inside the melting tank. A mobile module is installed on the outer wall of the melting tank, and the drive end of the mobile module is fixedly connected to one end of the connecting rod.

[0009] As a further description of the above technical solution: It also includes: an adjustment component, the adjustment component including a flow guide shroud installed on the inner wall of the housing, the flow guide shroud being located below the outlet of the feed pipe, the bottom end of the flow guide shroud being equipped with a connecting seat, and multiple connecting seats being arranged circumferentially; A swing arm, one end of which is rotatably mounted on the bottom of the connecting seat, and wind shields are installed on both sides of the swing arm.

[0010] As a further description of the above technical solution: The adjustment component further includes: a limiting frame, which is installed inside the swing arm and has a corresponding sliding groove inside; The mounting rod is positioned at the center of the fairing, and its top end is fixedly connected to the telescopic end of the electric push rod.

[0011] As a further description of the above technical solution: The adjustment assembly further includes: a connecting frame, which is installed at the bottom of the mounting rod, and a push rod is rotatably mounted on one end of the connecting frame, and the other end of the push rod is slidably connected to the limiting frame through a groove inside the limiting frame; A limiting rod is installed on one side of the push rod. A fixing block is slidably installed on one end of the limiting rod, and a sliding groove corresponding to the fixing block is provided on the inner side of the connecting frame. An inclined surface is provided on one side of the fixing block.

[0012] As a further description of the above technical solution: The feeding assembly further includes: an air collecting hood, which is installed on the top of the outer shell, and an exhaust pipe is installed on the top of the air collecting hood. The other end of the exhaust pipe is connected to the processing module, and a pressure control valve is provided inside the processing module. A support base is installed on the outer wall of the exhaust pipe, and an electric push rod is installed on the top surface of the support base, with the telescopic end of the electric push rod passing through the support base and the exhaust pipe.

[0013] As a further description of the above technical solution: The feeding assembly further includes a partition plate, which is installed on the inner wall of the housing and is located above the feed pipe outlet; The connecting pipe is located at the center of the partition plate and at the center of the flow guide, with a fixing block installed on the outer wall of the connecting pipe, an installation rod located inside the connecting pipe, and a connecting bracket slidably installed on the outer wall of the connecting pipe.

[0014] As a further description of the above technical solution: The feeding assembly further includes a vent, which is located on the top of the mounting cover and on the outside of the housing. A connecting sleeve is provided on the outer wall of the outer shell, and the connecting sleeve has a channel inside that corresponds to the vent hole. The other end of the channel is connected to the inside of the outer shell through the opening at the top of the outer shell, and the opening at the top of the outer shell is located above the partition plate.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this invention, by setting up a separation component, the design enables the following process when waste plastics are melted: as the plastics enter the melting tank, they fall onto the surface of the receiving tray. Simultaneously, as the heating process proceeds, the plastics with lower melting points melt first. Guided by the air guide plate, the airflow from the blower agitates the molten plastics, promoting the flow of the molten low-melting-point plastics and separating them from the high-melting-point plastics. Furthermore, by rotating the fixing ring and the receiving hopper, the receiving hopper aligns with the opening on the outer wall of the melting tank, allowing the falling molten plastics to flow into the conveying ring and be discharged from the discharge pipe. By discharging these plastics, the proportion of molten plastics in the tank is reduced, ensuring the purity of the remaining plastics in the tank.

[0016] 2. In this invention, by setting an adjustment component, this design enables the plastic to be fed into the melting tank. As the plastic falls into the guide shroud and is circulated by the airflow driven by the fan, the airflow enters the guide shroud, allowing some heat to enter and dry the plastic. This ensures the plastic is dry and prevents air bubbles from forming during the melting process, which could affect quality. Furthermore, the connecting frame can be moved by an electric push rod, which in turn moves the push rod. Under the action of the fixed block, the push rod pushes the swing frame, changing the opening area of ​​the windshield and thus the amount of airflow entering. This is adjusted according to the moisture content of the plastic to ensure sufficient drying.

[0017] 3. In this invention, by setting up a feeding assembly, the design enables intermittent feeding of waste plastics through a spiral feeder inside the feeding pipe during melting. Simultaneously, the airflow inside the melting tank can be guided to the exhaust pipe through the connecting sleeve and vent, allowing the airflow to be discharged outwards and processed by the processing module to reduce the impact of harmful gases generated by plastic melting on the outside environment. Furthermore, the airflow above the partition plate can be redirected back into the melting tank through the connecting pipe to achieve airflow circulation and prevent excessive air pressure at the top of the outer shell. Additionally, the processing module is equipped with a pressure relief valve to further ensure a constant pressure inside the melting tank. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a melting device used in a waste plastic recycling production line.

[0019] Figure 2 This is a schematic diagram showing the disassembled structure of a melting device used in a waste plastic recycling production line.

[0020] Figure 3 This is a schematic cross-sectional view of the feeding assembly and regulating assembly in a melting device for a waste plastic recycling production line.

[0021] Figure 4 This is a schematic diagram of the disassembled structure of a separation component in a melting device of a waste plastic recycling production line.

[0022] Figure 5 This is a schematic diagram of the separation structure of the fixing ring and the receiving tray in a melting device of a waste plastic recycling production line.

[0023] Figure 6 This is a schematic diagram showing the disassembled structure of the feeding component in a melting device of a waste plastic recycling production line.

[0024] Figure 7 This is a schematic diagram showing the disassembled structure of the regulating component in a melting device of a waste plastic recycling production line.

[0025] Figure 8 for Figure 7 A magnified structural diagram of part A in the middle.

[0026] Legend: 1. Discharge pipe; 2. Base; 3. Melting tank; 4. Separation assembly; 401. Fan; 402. Support frame; 403. Air guide plate; 404. Fixing ring; 405. Heating plate; 406. Receiving tray; 407. Conveying ring; 408. Mounting ring; 409. Connecting plate; 410. Grille; 411. Moving module; 412. Connecting rod; 413. Receiving hopper; 5. Feeding assembly; 501. Support base; 502. Exhaust pipe; 503. 504. Connecting sleeve; 505. Air collector hood; 506. Feeding pipe; 507. Divider plate; 508. Connecting pipe; 509. Outer shell; 500. Vent hole; 510. Mounting cover; 6. Adjusting assembly; 601. Electric push rod; 602. Mounting rod; 603. Flow guide; 604. Connecting seat; 605. Swing rod; 606. Wind shield; 607. Limiting frame; 608. Push rod; 609. Limiting rod; 610. Connecting frame; 611. Fixing block. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-8 This invention provides a technical solution: a melting device for a waste plastic recycling production line, comprising a base 2, a melting tank 3 on the top surface of the base 2, and a discharge pipe 1 at the bottom end of the base 2, wherein the discharge pipe 1 is connected to the melting tank 3, and further comprising: Please see Figure 4 , Figure 5 Separation component 4, the separation component 4 includes a blower 401 installed on the outer wall of the melting tank 3, and the outlet of the blower 401 penetrates through the opening of the outer wall of the melting tank 3; A fixing ring 404 is installed on the inner wall of the melting tank 3, and one side of the fixing ring 404 has an opening corresponding to the air outlet of the blower 401, and the air outlet side of the blower 401 is tangent to the inner ring of the fixing ring 404. The receiving tray 406 is located at the center of the melting tank 3. A connecting plate 409 is installed on the outer wall of the receiving tray 406 and is fixedly connected to the inner wall of the melting tank 3. The feeding assembly 5 includes a mounting cover 510 installed at the top of the melting tank 3. A housing 508 is installed at the top of the mounting cover 510. A feeding pipe 505 is provided on the outer wall of the housing 508, and a screw conveyor is provided inside the feeding pipe 505. The separation component 4 also includes: a support frame 402, which is installed on the inner wall of the fixing ring 404. A guide plate 403 is installed at the bottom of the support frame 402, and the guide plate 403 has an included angle and an inclined plate at the bottom of the guide plate 403. The guide plate 403 is located above the receiving tray 406. Heating plate 405 is installed above receiving tray 406, and multiple heating plates 405 are arranged around the circumference; Mounting ring 408 is rotatably mounted at the bottom of receiving plate 406. A grid bar 410 is mounted on the top of mounting ring 408, and the gap between the grid bar 410 and the heating plate 405 corresponds to the gap between the grid bar 410 and the heating plate 405. The separation component 4 also includes: a receiving hopper 413, which is installed on the outer wall of the mounting ring 408, and multiple receiving hoppers 413 are arranged circumferentially. The receiving hoppers 413 correspond to the connecting plate 409 and are located at the bottom of the connecting plate 409. The melting tank 3 has an opening inside that corresponds to the position of the grid bar 410, and the size of the opening is the same as that of the receiving hopper 413. The conveying ring 407 is sleeved on the outer wall of the melting tank 3, and the bottom end of the conveying ring 407 is inclined to one side. The conveying ring 407 has an opening inside that corresponds to the opening of the melting tank 3, and the bottom end of the conveying ring 407 is connected to a discharge pipe. The separation assembly 4 also includes a connecting rod 412, which is installed at the bottom of the receiving hopper 413 and is slidably connected to the melting tank 3 through a groove opened inside the melting tank 3. The moving module 411 is installed on the outer wall of the melting tank 3, and the driving end of the moving module 411 is fixedly connected to one end of the connecting rod 412. Furthermore, the mobile module 411 is a device known in the technical field and can be driven by means of motors, hydraulics, etc.

[0029] Specifically: When melting recycled waste plastics, as the plastics fall from the feeding pipe 505 into the melting tank 3, they will land on the surface of the receiving tray 406. The melting tank 3 and the heating plate 405 will then heat the plastics, causing them to gradually melt. At this time, the heating plate 405 will make the surface temperature of the receiving tray 406 high, so that the plastics with lower melting points can melt quickly. This allows the plastics with lower melting points to fall through the through holes inside the receiving tray 406 into the bottom of the melting tank 3, or they can fall through the gaps between the heating plates 405. At this time, the plastics with higher melting points are not completely melted, so that the plastics with higher melting points will not directly pass through the through holes and grid bars 410 on the surface of the receiving tray 406. Furthermore, during the melting process, the blower 401 can drive the airflow into the melting tank 3 and heat the airflow to ensure a constant temperature inside the tank. At the same time, since the air outlet of the blower 401 is tangent to the inner ring of the fixed ring 404, the airflow can flow along the inner ring of the fixed ring 404 and converge towards the center under the action of the air guide plate 403. Since the bottom end of the air guide plate 403 is provided with an inclined plate, the airflow can flow downward, thereby blowing the molten plastic on the surface of the material tray 406 to accelerate the flow of the molten plastic. This facilitates the flow of the low melting point plastic after melting, so as to separate it from the high melting point unmelted plastic. Furthermore, after the low-melting-point molten plastic flows downwards, the connecting rod 412 can be moved by the moving module 411 to rotate the receiving hopper 413 and the mounting ring 408. This also causes the grid 410 to move away from the gap in the heating plate 405, allowing the high-melting-point plastic to fall through the gap. Since the receiving hopper 413 corresponds to the opening of the melting tank 3, the plastic flows outwards after entering the receiving hopper 413 and flows into the conveying ring 407. Since the lower end of the conveying ring 407 is connected to the discharge pipe, the high-melting-point plastic can be discharged outwards.

[0030] Please see Figure 7 , Figure 8 Adjustment component 6 includes a flow guide 603 installed on the inner wall of housing 508, and the flow guide 603 is located below the outlet of feed pipe 505. A connecting seat 604 is installed at the bottom of the flow guide 603, and multiple connecting seats 604 are arranged circumferentially. A swing arm 605 is rotatably mounted at one end of a connecting seat 604, and wind shields 606 are installed on both sides of the swing arm 605. The adjustment component 6 also includes: a limiting frame 607, which is installed inside the swing arm 605 and has a corresponding sliding groove inside; Mounting rod 602 is located at the center of the flow guide 603, and the top end of mounting rod 602 is fixedly connected to the telescopic end of electric push rod 601. The adjustment assembly 6 also includes: a connecting frame 610, which is installed at the bottom of the mounting rod 602. A push rod 608 is rotatably mounted on one end of the connecting frame 610, and the other end of the push rod 608 is slidably connected to the limiting frame 607 through a groove inside the limiting frame 607. Limiting rod 609 is installed on one side of push rod 608. A fixing block 611 is slidably installed on one end of limiting rod 609, and a sliding groove corresponding to fixing block 611 is provided on the inner side of connecting frame 610, and a slope is provided on one side of fixing block 611.

[0031] Specifically, during the melting process of waste plastics, as the plastics pass through the guide shroud 603 and enter the melting tank 3, the airflow blown by the fan 401 can enter the guide shroud 603 under the action of the baffle 606. Since the airflow contains some heat, the heat can dry the plastics falling inside the guide shroud 603, thereby reducing the moisture content in the waste plastics and ensuring the quality during melting. Furthermore, the electric push rod 601 can drive the mounting rod 602 to move, thereby moving the connecting frame 610. During the movement of the connecting frame 610, the push rod 608 can be pushed to move. Simultaneously, under the limitation of the limiting rod 609 by the fixed block 611, the push rod 608 can swing. Through the connection between the push rod 608 and the limiting frame 607, the swing rod 605 can be driven to swing, thereby adjusting the angle of the swing rod 605 and adjusting the unfolded area of ​​the wind deflector 606. This allows more airflow to enter the interior of the guide shroud 603, ensuring timely drying when the internal moisture of the plastic is high, thus further ensuring the drying effect.

[0032] Please see Figure 3 , Figure 6 The feeding assembly 5 also includes: an air collecting hood 504, which is installed on the top of the housing 508. An exhaust pipe 502 is installed on the top of the air collecting hood 504, and the other end of the exhaust pipe 502 is connected to the processing module. A pressure control valve is provided inside the processing module. Support base 501 is installed on the outer wall of exhaust pipe 502, and electric push rod 601 is installed on the top surface of support base 501, and the telescopic end of electric push rod 601 passes through support base 501 and exhaust pipe 502. The feeding assembly 5 also includes a partition plate 506, which is installed on the inner wall of the housing 508 and is located above the outlet of the feeding pipe 505. The connecting pipe 507 is located at the center of the partition plate 506 and at the center of the flow guide 603. The fixing block 611 is installed on the outer wall of the connecting pipe 507, the mounting rod 602 is located inside the connecting pipe 507, and the connecting bracket 610 is slidably installed on the outer wall of the connecting pipe 507. The feeding assembly 5 also includes a vent 509, which is located at the top of the mounting cover 510 and on the outside of the housing 508. The connecting sleeve 503 is disposed on the outer wall of the outer shell 508, and the connecting sleeve 503 has a channel corresponding to the vent 509 inside, and the other end of the channel is connected to the inside of the outer shell 508 through the top opening of the outer shell 508, and the top opening of the outer shell 508 is located above the partition plate 506.

[0033] Specifically: During melting, waste plastic can be intermittently fed into the guide shroud 603 through the feeding pipe 505 and sent into the melting tank 3 for melting. At the same time, when the blower 401 drives the airflow, the airflow can enter the connecting sleeve 503 through the vent 509, and then pass through the connecting sleeve 503 directly into the top of the outer shell 508. The airflow is discharged through the air collection shroud 504 and the exhaust pipe 502. At the same time, the harmful gases contained in the airflow can be treated by the processing module connected to the exhaust pipe 502 to ensure the safety of the discharged gas. Furthermore, when the airflow passes through the guide shroud 603 and enters the interior of the outer shell 508, the plastic can be blocked by the partition plate 506 to prevent the plastic from being blown back into the air collection shroud 504 due to excessive airflow. If the pressure above the partition plate 506 is too high due to excessive airflow, the airflow can pass through the connecting pipe 507 and re-enter the melting tank 3 to complete the airflow circulation.

[0034] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A melting device for a waste plastic recycling production line, comprising: A base (2) is provided on the top surface of which is a melting tank (3), and a discharge pipe (1) is provided at the bottom end of which is connected to the melting tank (3). The base (2) is characterized by further comprising: The separation component (4) includes a fan (401) installed on the outer wall of the melting tank (3), and the air outlet of the fan (401) penetrates through the opening of the outer wall of the melting tank (3); A fixing ring (404) is installed on the inner wall of the melting tank (3), and one side of the fixing ring (404) is provided with an opening corresponding to the air outlet of the blower (401), and the air outlet side of the blower (401) is tangent to the inner ring of the fixing ring (404); The receiving tray (406) is located at the center of the melting tank (3). A connecting plate (409) is installed on the outer wall of the receiving tray (406), and the connecting plate (409) is fixedly connected to the inner wall of the melting tank (3). The feeding assembly (5) includes a mounting cover (510) installed on the top of the melting tank (3), a housing (508) is installed on the top of the mounting cover (510), a feeding pipe (505) is provided on the outer wall of the housing (508), and a screw conveyor is provided inside the feeding pipe (505).

2. The melting device for a waste plastic recycling processing production line according to claim 1, characterized in that, The separation component (4) further includes: A support frame (402) is installed on the inner wall of a fixing ring (404). A guide plate (403) is installed at the bottom of the support frame (402), and the guide plate (403) has an included angle. The bottom of the guide plate (403) is provided with an inclined plate, and the guide plate (403) is located above the receiving tray (406). Heating plate (405), the heating plate (405) is installed above the receiving tray (406), and multiple heating plates (405) are arranged around the circumference; Mounting ring (408) is rotatably mounted at the bottom of receiving tray (406). A grid bar (410) is mounted on the top of the mounting ring (408), and the gap between the grid bar (410) and the heating plate (405) corresponds to that between the grid bar (410) and the heating plate (405).

3. The melting device for a waste plastic recycling processing production line according to claim 2, characterized in that, The separation component (4) further includes: A receiving hopper (413) is installed on the outer wall of the mounting ring (408), and multiple receiving hoppers (413) are arranged around the circumference. The receiving hoppers (413) correspond to the connecting plate (409), and the receiving hoppers (413) are located at the bottom end of the connecting plate (409). The melting tank (3) has an opening inside that corresponds to the position of the grid bar (410), and the size of the opening is the same as that of the receiving hopper (413). The conveying ring (407) is sleeved on the outer wall of the melting tank (3), and the bottom end of the conveying ring (407) is inclined to one side. The conveying ring (407) has an opening inside that corresponds to the opening of the melting tank (3), and the bottom end of the conveying ring (407) is connected to a discharge pipe.

4. The melting device for a waste plastic recycling processing production line according to claim 3, characterized in that, The separation component (4) further includes: Connecting rod (412), the connecting rod (412) is installed at the bottom of receiving hopper (413), and the connecting rod (412) is slidably connected to the melting tank (3) through a groove opened inside the melting tank (3); The moving module (411) is installed on the outer wall of the melting tank (3), and the driving end of the moving module (411) is fixedly connected to one end of the connecting rod (412).

5. The melting device for a waste plastic recycling production line according to claim 1, characterized in that, Also includes: Adjustment component (6), the adjustment component (6) includes a flow guide (603) installed on the inner wall of the housing (508), and the flow guide (603) is located below the outlet of the feed pipe (505). A connecting seat (604) is installed at the bottom end of the flow guide (603), and multiple connecting seats (604) are arranged circumferentially. A swing rod (605) is rotatably mounted at one end of a connecting seat (604), and wind deflectors (606) are installed on both sides of the swing rod (605).

6. A melting device for a waste plastic recycling production line according to claim 5, characterized in that, The adjustment component (6) further includes: A limiting frame (607) is installed inside the swing rod (605), and the limiting frame (607) is provided with a corresponding sliding groove inside; Mounting rod (602) is located at the center of the fairing (603), and the top end of the mounting rod (602) is fixedly connected to the telescopic end of the electric push rod (601).

7. A melting device for a waste plastic recycling production line according to claim 6, characterized in that, The adjustment component (6) further includes: A connecting frame (610) is installed at the bottom of the mounting rod (602). A push rod (608) is rotatably installed at one end of the connecting frame (610), and the other end of the push rod (608) is slidably connected to the limiting frame (607) through a groove inside the limiting frame (607). A limiting rod (609) is installed on one side of the push rod (608). A fixing block (611) is slidably installed on one end of the limiting rod (609), and a groove corresponding to the fixing block (611) is provided on the inner side of the connecting frame (610), and an inclined surface is provided on one side of the fixing block (611).

8. A melting device for a waste plastic recycling production line according to claim 7, characterized in that, The feeding assembly (5) also includes: An air collecting hood (504) is installed on the top of the outer shell (508). An exhaust pipe (502) is installed on the top of the air collecting hood (504), and the other end of the exhaust pipe (502) is connected to the processing module. A pressure control valve is provided inside the processing module. A support base (501) is installed on the outer wall of the exhaust pipe (502), and an electric push rod (601) is installed on the top surface of the support base (501), and the telescopic end of the electric push rod (601) passes through the support base (501) and the exhaust pipe (502).

9. A melting device for a waste plastic recycling production line according to claim 7, characterized in that, The feeding assembly (5) also includes: A partition plate (506) is installed on the inner wall of the housing (508) and the partition plate (506) is located above the outlet of the feed pipe (505); A connecting pipe (507) is located at the center of the partition plate (506) and at the center of the flow guide (603). A fixing block (611) is installed on the outer wall of the connecting pipe (507), and an installation rod (602) is located inside the connecting pipe (507). A connecting bracket (610) is slidably installed on the outer wall of the connecting pipe (507).

10. A melting device for a waste plastic recycling production line according to claim 9, characterized in that, The feeding assembly (5) also includes: Vent hole (509) is provided at the top of mounting cover (510) and is located on the outside of housing (508); A connecting sleeve (503) is provided on the outer wall of the outer shell (508), and the connecting sleeve (503) has a channel corresponding to the vent (509) inside, and the other end of the channel is connected to the inside of the outer shell (508) through the top opening of the outer shell (508), and the top opening of the outer shell (508) is located above the partition plate (506).

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