A hot melting device for waste plastic resource processing

Abstract

This invention discloses a hot-melt device for the resource recovery of waste plastics, belonging to the field of plastic waste recycling technology. It includes a hot-melt machine with a shell on top and a main frame inside. A feeder is located at one end of the main frame, and two air pipes are located in the middle section of the main frame. Multiple crushing teeth are fitted around the outside of the air pipes. An energy-storing and projectile mechanism includes a pusher plate located in the middle section of the main frame. A tension mechanism includes a constant tension membrane located at the other end of the main frame. An air-film protection mechanism includes multiple fixed seats embedded in the outer wall of the crushing teeth, with multiple air outlet grooves formed around the outer wall of each fixed seat along its axis. In this invention, the energy-storing and projectile mechanism improves material dispersion, the tension mechanism achieves precise component sorting, and the air-film protection solves the problems of electrostatic adhesion and heat dissipation during the crushing process. This improves the efficiency of waste plastic resource recovery and the stability of equipment operation, while reducing the frequency of device maintenance and operating costs.

Description

Technical Field

[0001] This invention belongs to the field of plastic waste recycling technology, and in particular relates to a hot melt device for the resource-based treatment of waste plastics. Background Technology

[0002] With the acceleration of global industrialization, plastic products are increasingly widely used in production and daily life. As a result, the treatment of waste plastics has become a core issue in the field of environmental governance and resource recycling. The resource-based treatment of waste plastics mainly includes recycling, sorting, crushing and reprocessing. Among them, hot melt treatment, as an efficient means of volume reduction and granulation, is a key technology for realizing plastic recycling. In actual hot melt processing, in order to ensure the mechanical properties and purity of recycled materials, it is necessary to accurately sort the components of mixed waste plastics before hot melt.

[0003] Existing waste plastic processing equipment mostly uses continuous stacking conveying, which causes waste plastics to overlap and interfere with each other before entering the sorting zone, affecting the accuracy of subsequent sorting. The elastic sorting of existing waste plastic processing equipment mostly uses a fixed rigid rebound base plate, whose feedback force field is fixed, making it difficult to dynamically adjust the energy feedback according to the thickness and density of the material. Moreover, for waste plastics with similar physical properties, the single rebound mode causes the material drop areas to overlap, making it difficult to meet the requirements of high-value utilization in terms of sorting purity. In the crushing stage, the high-frequency friction between the metal crushing teeth makes it easy for static electricity to accumulate on the surface of the crushing teeth. Film plastics in waste plastics are easy to adhere to the surface of the crushing teeth under the action of electrostatic attraction, resulting in a decrease in crushing efficiency. In some cases, the material entanglement may even cause equipment overheating and damage or downtime for maintenance, increasing the operating cost of resource recovery. Summary of the Invention

[0004] The purpose of this invention is to address the problems of severe material stacking during material conveying in existing waste plastic hot melt devices, the limited identification dimensions in the sorting of existing waste plastic hot melt devices, and the tendency for electrostatic adhesion during the crushing process in existing waste plastic hot melt devices. Therefore, this invention proposes a hot melt device for the resource recovery of waste plastics.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A hot-melting device for the resource recovery of waste plastics includes a hot-melting machine. The hot-melting machine has an outer shell on top, a main frame inside the outer shell, a feeder at one end of the main frame, two air supply pipes in the middle section of the main frame, and multiple crushing teeth on the outside of the air supply pipes.

[0007] An energy-storing projectile mechanism includes a push plate located in the middle section of the main frame, which releases energy instantaneously to project waste plastic.

[0008] The tension mechanism includes a constant tension membrane located at the other end of the main frame, through which the waste plastic impacting it is given a rebound vector for elastic sorting;

[0009] The air film protection mechanism includes multiple fixed seats embedded in the outer wall of the crushing tooth. The outer wall of the fixed seat has multiple air outlet grooves around its axis. The air delivered by the air supply pipe is discharged through the air outlet grooves to form an air film to protect the crushing tooth.

[0010] As a further description of the above technical solution:

[0011] The energy storage projectile mechanism also includes:

[0012] The two support frames are located inside the outer casing on one side, and the two ends of the support frames are respectively connected to the corresponding positions of the inner wall of the outer casing;

[0013] A slide table is provided on the top of the support frame, and limit grooves are provided on both outer walls of the slide table;

[0014] The slider is slidably connected to the top of the slide table, and both sides of the slider are provided with rods, one end of which passes through a limiting groove.

[0015] A reciprocating lead screw is located on one side of the slide table. A movable seat is provided on the outside of the reciprocating lead screw, and one side of the movable seat is connected to the rod body on one side of the slide table.

[0016] As a further description of the above technical solution:

[0017] The energy storage projectile mechanism also includes:

[0018] An impact shaft is slidably connected to the top of the slider, and one end of the impact shaft is connected to the outer wall of one side of the push plate;

[0019] A baffle, wherein one outer wall of the baffle is connected to one side of the slider;

[0020] A telescopic rod, one end of which passes through the outer wall of one side of the baffle, and the other end of which abuts against the other end of the impact shaft;

[0021] The second spring is located outside the telescopic rod, and its two ends are connected to the corresponding positions of the outer wall of one side of the baffle and the outer wall of one end of the telescopic rod, respectively.

[0022] As a further description of the above technical solution:

[0023] The energy storage projectile mechanism also includes:

[0024] A locking block is located at the top of one end of the impact shaft;

[0025] A rotating frame is mounted on the top of the slide table, and a rotating plate is rotatably connected to the top of the rotating frame.

[0026] A first spring is located above the slide table, and both ends of the first spring are rotatably connected to the bottom of the rotating plate and the top of the slide table respectively through blocks.

[0027] The motor is mounted on one side of the slide via a plate, and the output end of the motor is connected to one end of the reciprocating lead screw.

[0028] As a further description of the above technical solution:

[0029] The tension mechanism further includes:

[0030] Mounting frame, which is connected to one end of the main frame, and constant tension membrane is sleeved on the outside of the mounting frame;

[0031] A fixing plate, one side of which is connected to the inner wall of the outer casing at a corresponding position;

[0032] A bushing, one end of which is connected to the other side of a fixed plate;

[0033] A positioning seat, one side of which is connected to the other end of the bushing.

[0034] As a further description of the above technical solution:

[0035] The tension mechanism further includes:

[0036] A central shaft is located inside the bushing, with one end of the central shaft passing through one side of the positioning seat;

[0037] Connecting seats, a plurality of the connecting seats are disposed around the central axis on the outer wall of the central axis;

[0038] Movable plates, a plurality of said movable plates are arranged outside the central axis around the central axis;

[0039] A synchronizing rod, one end of which is rotatably connected to a connecting seat, and the other end of which is rotatably connected to a corresponding position on the inner wall of the moving plate.

[0040] As a further description of the above technical solution:

[0041] The tension mechanism further includes:

[0042] Guide grooves, a plurality of such guide grooves are formed on the outer wall of the positioning seat around the axis of the positioning seat;

[0043] A guide rod is provided on one side of the movable plate, and one end of the guide rod passes through the guide groove;

[0044] The travel grooves are formed around the central axis on the outer wall of the bushing, and the top of the connecting seat passes through the travel grooves;

[0045] An electric actuator is mounted on one side of the housing via a plate, and the telescopic part of the electric actuator is connected to one end of the central shaft.

[0046] As a further description of the above technical solution:

[0047] The air-supported membrane structure also includes:

[0048] Air intake slots, a plurality of such air intake slots are formed around the axis of the fixed base on the inner wall of the fixed base;

[0049] Extrusion blocks, a plurality of the extrusion blocks being embedded inside the fixed base around the axis of the fixed base;

[0050] A connecting groove is formed inside the extrusion block.

[0051] As a further description of the above technical solution:

[0052] The air-supported membrane structure also includes:

[0053] A floating plug, wherein the floating plug is disposed inside the fixed base;

[0054] A compression ring is sleeved on the outer wall of the floating plug, and the outer wall of the compression ring abuts against the outer wall of one side of the compression block.

[0055] As a further description of the above technical solution:

[0056] The air-supported membrane structure also includes:

[0057] A motion sleeve, wherein the motion sleeve is fitted over the outside of the fixed base;

[0058] A clearance groove is formed inside the movement sleeve;

[0059] A blocking ring, wherein the blocking ring is sleeved on the outer wall of the moving sleeve;

[0060] The third spring is sleeved on the outside of the moving sleeve, and its two ends are respectively connected to the corresponding positions of the outer wall of the blocking ring and the outer wall of the fixed seat.

[0061] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0062] 1. In this invention, by setting up an energy storage and throwing mechanism, the kinetic energy provided by the motor is converted into periodic elastic potential energy release, which causes the pusher plate to accelerate and push the accumulated waste plastic, so that the waste plastic gains an initial velocity and is thrown out discretely along a preset trajectory, realizing the periodic throwing of waste plastic, improving the dispersion of waste plastic, and providing a prerequisite for subsequent elastic sorting.

[0063] 2. In this invention, by setting up a tension mechanism and utilizing the radial movement of the moving plate, the prestress on the surface of the constant tension membrane is precisely controlled. Combined with the shear thickening fluid in the back sealing cavity, the difference in rebound distance between rigid plastics and lightweight plastics can be amplified according to the shear rate of impact, solving the problem of difficult separation of mixed waste plastic components and improving the sorting accuracy of the device.

[0064] 3. In this invention, by setting up an air film protection mechanism, the internal floating plug and the moving sleeve are driven by air pressure, so that the crushing tooth can continuously spray air through the air outlet groove in the working state, so that the air film forms an isolation layer on the outer wall of the crushing tooth, thereby effectively counteracting the electrostatic adsorption force and preventing the adhesion and entanglement of thin film plastics. At the same time, the airflow can help cool down, protect the crushing tooth, reduce the number of maintenance and reduce operating costs. Attached Figure Description

[0065] Figure 1 This is a schematic diagram of the main structure of a hot-melt device for the resource recovery of waste plastics proposed in this invention;

[0066] Figure 2 This is a schematic diagram showing the disassembled structure of a hot-melt device for the resource recovery of waste plastics proposed in this invention.

[0067] Figure 3 This is a schematic diagram of some parts of a hot melt device for the resource recovery of waste plastics proposed in this invention.

[0068] Figure 4 This is a schematic diagram of the energy storage and ejection mechanism of a hot-melt device for the resource recovery of waste plastics proposed in this invention.

[0069] Figure 5 For the present invention Figure 4 A magnified structural diagram of part A in the middle;

[0070] Figure 6 This is a half-sectional schematic diagram of the energy storage and ejection mechanism of a hot-melt device for the resource recovery of waste plastics proposed in this invention.

[0071] Figure 7 This is a schematic diagram of the tension mechanism of a hot-melt device for the resource recovery of waste plastics proposed in this invention;

[0072] Figure 8This is a schematic diagram of the tension mechanism of a hot-melt device for the resource recovery of waste plastics proposed in this invention.

[0073] Figure 9 This is a schematic diagram of the air film protection mechanism of a hot melt device for the resource recovery of waste plastics proposed in this invention;

[0074] Figure 10 This is a half-sectional schematic diagram of the air film protection mechanism of a hot-melt device for the resource recovery of waste plastics proposed in this invention.

[0075] Legend: 1. Hot melt machine; 2. Outer shell; 3. Main frame; 4. Feeder; 5. Energy storage projectile mechanism; 501. Support frame; 502. Slide table; 503. Limiting groove; 504. Slider; 505. Baffle; 506. Impact shaft; 507. Locking block; 508. Push plate; 509. Rotating frame; 510. Rotating plate; 511. First spring; 512. Telescopic rod; 513. Second spring; 514. Reciprocating screw; 515. Moving seat; 516. Motor; 6. Tension mechanism; 601. Mounting frame; 602. Electric push rod; 603. Constant tension 604. Force membrane; 605. Fixed plate; 606. Central shaft; 607. Positioning seat; 608. Guide groove; 609. Bushing; 610. Stroke groove; 611. Connecting seat; 612. Synchronizing rod; 613. Moving plate; 614. Guide rod; 7. Air supply pipe; 8. Crushing tooth; 9. Air membrane protection mechanism; 901. Fixed seat; 902. Air inlet groove; 903. Air outlet groove; 904. Floating plug; 905. Extrusion ring; 906. Extrusion block; 907. Connecting groove; 908. Moving sleeve; 909. Relief groove; 910. Blocking ring; 911. Third spring. Detailed Implementation

[0076] 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.

[0077] Please see Figures 1-10 The present invention provides a technical solution: a hot melt device for the resource utilization of waste plastics, including a hot melt machine 1, a shell 2 on the top of the hot melt machine 1, a main frame 3 inside the shell 2, a feeder 4 at one end of the main frame 3, two air supply pipes 7 in the middle section of the main frame 3, and multiple crushing teeth 8 on the outside of the air supply pipes 7.

[0078] The energy storage and projectile mechanism 5 includes a push plate 508 located in the middle section of the main frame 3, which releases energy instantaneously to project waste plastic.

[0079] Tension mechanism 6 includes a constant tension membrane 603 located at the other end of the main frame 3, which imparts a rebound vector to the waste plastics that collide with it for elastic sorting.

[0080] The air film protection mechanism 9 includes multiple fixed seats 901 embedded in the outer wall of the crushing tooth 8. Multiple air outlet grooves 903 are opened around the outer wall of the fixed seat 901 around its axis. The air delivered by the air supply pipe 7 is discharged through the air outlet grooves 903 to form an air film to protect the crushing tooth 8.

[0081] The energy storage projectile mechanism 5 also includes:

[0082] Support frame 501, two support frames 501 are provided inside the outer shell 2 on one side, and the two ends of the support frame 501 are respectively connected to the corresponding positions of the inner wall of the outer shell 2;

[0083] Slide 502 is located on top of support frame 501, and limit grooves 503 are provided on both outer walls of slide 502.

[0084] The slider 504 is slidably connected to the top of the slide table 502. Both sides of the slider 504 are provided with rods, and one end of the rod passes through the limiting groove 503.

[0085] A reciprocating lead screw 514 is located on one side of the slide table 502. A movable seat 515 is provided outside the reciprocating lead screw 514. One side of the movable seat 515 is connected to the rod body on one side of the slider 504.

[0086] The energy storage projectile mechanism 5 also includes:

[0087] Impact shaft 506 is slidably connected to the top of slider 504, and one end of impact shaft 506 is connected to the outer wall of one side of push plate 508.

[0088] Baffle 505, one side of the outer wall of baffle 505 is connected to one side of slider 504;

[0089] Telescopic rod 512, one end of which passes through the outer wall of one side of baffle 505, and the other end of which abuts against the other end of impact shaft 506;

[0090] The second spring 513 is located outside the telescopic rod 512, and its two ends are respectively connected to the corresponding positions of the outer wall of one side of the baffle 505 and the outer wall of one end of the telescopic rod 512.

[0091] The energy storage projectile mechanism 5 also includes:

[0092] The locking block 507 is located at the top of one end of the impact shaft 506;

[0093] A rotating frame 509 is located on the top of the slide table 502, and a rotating plate 510 is rotatably connected to the top of the rotating frame 509.

[0094] The first spring 511 is located above the slide table 502. Both ends of the first spring 511 are rotatably connected to the bottom of the rotating plate 510 and the top of the slide table 502 respectively through blocks.

[0095] Motor 516 is mounted on one side of slide table 502 via a plate, and the output end of motor 516 is connected to one end of reciprocating lead screw 514.

[0096] Specifically: The motor 516 is controlled by the built-in control system of the hot melt machine 1. The motor 516 drives the reciprocating screw 514 to rotate through the output end. The external thread on the outer wall of the reciprocating screw 514 meshes with the internal thread on the inner wall of the moving seat 515, so that the moving seat 515 can move back and forth along the direction of the reciprocating screw 514. The moving seat 515 drives the slider 504 to move synchronously through the rod on one side of the slider 504. The slider 504 drives the impact shaft 506 to move synchronously through the telescopic rod 512. When the impact shaft 506 moves to the side of the top locking block 507 and abuts against the side wall of the bottom protrusion of the rotating plate 510, the first spring 511 pulls the side of the rotating plate 510 away from the rotating frame 509 through its own elasticity, so that the rotating plate 510 presses against the locking block 507 through the bottom protrusion to fix the position of the impact shaft 506.

[0097] Furthermore, the movable seat 515 drives the slider 504 to continue moving, the gap between the impact shaft 506 and the baffle 505 decreases, the end of the telescopic rod 512 that penetrates the baffle 505 extends relative to the baffle 505, the second spring 513 is compressed, and the second spring 513 begins to store energy.

[0098] Furthermore, as the baffle 505 moves synchronously with the slider 504 until its top inclined surface contacts the edge of the rotating plate 510 away from the rotating frame 509, the slider 504 continues to move. The edge of the rotating plate 510 abuts against and slides relative to the top inclined surface of the baffle 505. The rotating plate 510 rotates about the top of the rotating frame 509 as its axis, causing the side of the rotating plate 510 away from the rotating frame 509 to lift. When the rotating plate 510 is lifted, the bottom protrusion of the rotating plate 510 separates from the locking block 507, and the first spring 511 is stretched. When the second spring 513 is released, it converts the elastic potential energy accumulated during compression into elastic force to push the impact shaft 506, causing the impact shaft 506 to gain an instantaneous acceleration and slide out relative to the slider 504. The impact shaft 506 drives the push plate 508 to move synchronously, causing the push plate 508 to gain an instantaneous acceleration and throw out the waste plastic accumulated in the middle section of the main frame 3. Through the periodic reciprocating movement of the moving seat 515 along the reciprocating screw 514, the push plate 508 can periodically complete the energy storage and waste plastic throwing action.

[0099] It should be further noted that the option for motor 516 in the above description can be selected as needed. This part is well-known technology in the field and will not be elaborated here.

[0100] It should be further explained that the reciprocating screw 514 described above is a closed helical track formed by two threaded grooves with the same pitch and opposite directions connected by a transition curve. The motion conversion is achieved by using the thrust of the helical side on the moving seat 515. This part is well known in the field and will not be described in detail here.

[0101] Please see Figures 7-8 The tension mechanism 6 also includes:

[0102] Mounting bracket 601 is connected to one end of the main frame 3, and constant tension membrane 603 is sleeved on the outside of mounting bracket 601;

[0103] Fixing plate 604, one side of fixing plate 604 is connected to the corresponding position of the inner wall of the outer shell 2;

[0104] Bushing 608, one end of which is connected to the other side of fixing plate 604;

[0105] Positioning seat 606, one side of which is connected to the other end of bushing 608.

[0106] Tension mechanism 6 also includes:

[0107] A central shaft 605 is located inside a bushing 608, with one end of the central shaft 605 passing through one side of a positioning seat 606.

[0108] Connecting seats 610, multiple connecting seats 610 are arranged around the axis of the central shaft 605 on the outer wall of the central shaft 605;

[0109] Movable plate 612, multiple movable plates 612 are arranged around the central axis 605 outside the central axis 605;

[0110] Synchronizing rod 611, one end of which is rotatably connected to connecting seat 610, and the other end of which is rotatably connected to the corresponding position on the inner wall of moving plate 612.

[0111] Tension mechanism 6 also includes:

[0112] Guide grooves 607, multiple guide grooves 607 are formed on the outer wall of positioning seat 606 around the axis of positioning seat 606;

[0113] Guide rod 613 is located on one side of movable plate 612, and one end of guide rod 613 passes through guide groove 607;

[0114] The stroke groove 609, multiple stroke grooves 609 are formed around the axis of the central shaft 605 on the outer wall of the bushing 608, and the top of the connecting seat 610 passes through the stroke groove 609;

[0115] Electric push rod 602 is mounted on one side of housing 2 via a plate, and the telescopic part of electric push rod 602 is connected to one end of central shaft 605.

[0116] Specifically: the electric push rod 602 drives the central shaft 605 to slide relative to the bushing 608 through the telescopic part. When the electric push rod 602 pulls the central shaft 605 towards the positioning seat 606, the connecting seat 610 moves from one end of the stroke groove 609 near the fixed plate 604 to the other end. Multiple connecting seats 610 push the moving plate 612 outward through the synchronous rod 611. The guide rod 613 moves from one end of the guide groove 607 to the other end, causing the moving plate 612 to move radially relative to the bushing 608. The synchronous movement of multiple moving plates 612 increases the circumference of the annular support formed by the multiple moving plates 612. One end of the constant tension membrane 603 is wrapped around the outside of the moving plate 612. The radial expansion of the moving plate 612 can apply precise radial prestress to the membrane surface. When the moving plate 612 expands radially, the tension of the constant tension membrane 603 increases. Conversely, when the moving plate 612 contracts radially, the tension of the constant tension membrane 603 weakens.

[0117] Furthermore, the back sealing cavity of the constant tension membrane 603 is filled with a shear thickening fluid. When the waste plastic thrown by the energy storage ejection mechanism 5 impacts the membrane surface, the constant tension membrane 603 provides feedback to the impacting waste plastic. The rigid plastic has a large momentum, and its membrane surface displacement is transferred to the shear thickening fluid layer at the moment of impact, generating a high shear rate and triggering the fluid particle cluster formation effect, which causes the interface equivalent stiffness to surge. This, together with the constant tension membrane 603, provides quasi-elastic rebound, giving the material a high rebound vector. The lightweight plastic has a small momentum, and its shear thickening fluid maintains a viscous flow state at the moment of impact. The viscoelastic damping effect of the shear thickening fluid is used to absorb most of the impact energy, so that the lightweight plastic only produces a small amount of rebound.

[0118] It should be noted that the electric actuator 602 described above is a new type of linear actuator composed of a motor, an actuator, and a control device. It is an electric drive device that converts the rotational motion of the motor into the linear reciprocating motion of the actuator. This part is well-known technology in the field and will not be described in detail here.

[0119] It should be noted that the shear-thickening fluid described above is a non-Newtonian fluid, whose viscosity increases sharply with the increase of shear rate or shear stress. At low-speed shearing, it behaves as a liquid and has fluidity. Under rapid impact or strong shearing, due to the fluid cluster structure formed by the suspension particles, it will instantly become a hardened state similar to a solid. This part is well known in the field and will not be elaborated here.

[0120] It should be noted that the initial pretension of the membrane surface mentioned above... Radial displacement difference with moving plate 612 The relationship is:

[0121] ;

[0122] in For the elastic modulus of the membrane material, For film thickness, Let be the initial radius.

[0123] It should be noted that the residual kinetic energy after the impact of the waste plastic mentioned above... The relationship with the response of the constant tension membrane 603 is as follows:

[0124] ;

[0125] in, The energy stored for the elasticity of the membrane surface is the energy absorbed when the constant tension membrane is deformed under pressure. Since the membrane has a constant prestress, most of this energy will be fed back to the material, which is the main driving force for the rebound.

[0126] Among them, the dissipation work of shear-thickening fluid for:

[0127] ;

[0128] viscosity Shear rate The function, for lightweight plastics, Low Low, thus exhibiting high damping absorption. Increase Reduce, for rigid plastics, Gao Shi The surge manifests as energy storage rather than energy consumption. Decrease Increase.

[0129] Please see Figures 9-10 The air-supported membrane structure 9 also includes:

[0130] Air intake slots 902, multiple air intake slots 902 are formed around the axis of the fixed base 901 on the inner wall of the fixed base 901;

[0131] Extrusion blocks 906, multiple extrusion blocks 906 are embedded inside the fixed base 901 around the axis of the fixed base 901;

[0132] The connecting groove 907 is located inside the extrusion block 906.

[0133] The air-supported membrane structure 9 also includes:

[0134] Floating plug 904 is located inside the fixed seat 901;

[0135] The extrusion ring 905 is sleeved on the outer wall of the floating plug 904, and the outer wall of the extrusion ring 905 abuts against the outer wall of one side of the extrusion block 906.

[0136] The air-supported membrane structure 9 also includes:

[0137] The sports sleeve 908 is fitted onto the outside of the fixed base 901;

[0138] The clearance slot 909 is located inside the sports sleeve 908;

[0139] A blocking ring 910 is sleeved on the outer wall of the moving sleeve 908;

[0140] The third spring 911 is sleeved on the outside of the moving sleeve 908, and the two ends of the third spring 911 are respectively connected to the corresponding positions of the outer wall of the blocking ring 910 and the outer wall of the fixed seat 901.

[0141] Specifically, after elastic sorting, hard plastics rebound a long distance and fall into the crushing area far from the tension mechanism 6. The crushing teeth 8 in this area are relatively loosely arranged. Light plastics rebound a short distance and fall into the crushing area close to the tension mechanism 6. The crushing teeth 8 in this area are relatively densely arranged. The crushing teeth 8 crush waste plastics by the relative friction and shearing force between the crushing teeth 8. High-frequency friction causes static electricity between the crushing teeth 8. Static electricity accumulation will cause film-type waste plastics to adhere to the outer wall of the crushing teeth 8.

[0142] The crushing tooth 8 is hollow inside. Two sets of air-film protection mechanisms 9 are arranged as a group, with each group symmetrically embedded on the inner walls of both sides of the crushing tooth 8. The three groups of air-film protection mechanisms 9 are arranged around the axis of the crushing tooth 8. An air compressor delivers air through the air supply pipe 7 and its outer branch pipes to the internal cavity of the crushing tooth 8. The air pressure pushes the floating plug 904 outward relative to the fixed seat 901. The extrusion ring 905 moves synchronously with the floating plug 904. The inclined surface of the outer wall of the extrusion ring 905 abuts against one inclined surface of the extrusion block 906, pushing the extrusion block 906 outward. The other inclined surface of the extrusion block 906 abuts against the inclined surface of the relief groove 909. When the extrusion block 906 moves outward, it pushes the moving sleeve 908... When the fixed base 901 rises, the third spring 911 is compressed. When the extrusion block 906 moves outward, the two ends of the connecting groove 907 inside the extrusion block 906 are connected to the air inlet groove 902 and the air outlet groove 903 respectively. The air in the cavity of the crushing tooth 8 is discharged through the air outlet groove 903 and continuously forms an air film on the outside of the crushing tooth 8, preventing the thin film plastic from adhering. When the air supply stops, the third spring 911 is released. The third spring 911 pushes the moving sleeve 908 to reset through its own elasticity. The moving sleeve 908 pushes the extrusion block 906 to reset. The connecting groove 907 is misaligned with the air inlet groove 902 and the air outlet groove 903. The extrusion block 906 pushes the floating plug 904 to reset. The outer wall of the floating plug 904 seals the air inlet groove 902.

[0143] Working principle: When in use, the operator starts the electric push rod 602 and pre-adjusts the tension of the constant tension membrane 603. After setting, the operator places the waste plastic to be processed on the top of the feeder 4. The feeder 4 transports the waste plastic into the outer shell 2 and accumulates it at the push plate 508 in the middle section of the main frame 3. The operator starts the motor 516, and the energy storage and throwing mechanism 5 periodically throws out the waste plastic. After being thrown out, the waste plastic impacts the constant tension membrane 603 for elastic sorting. The sorted waste plastic is located in different crushing areas according to its category. The operator starts the crushing device and the air compressor to crush the waste plastic. The crushed waste plastic enters the hot melt machine 1 below. The operator starts the hot melt machine 1 to heat melt the waste plastic.

[0144] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0145] 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 hot-melt device for the resource recovery of waste plastics, comprising a hot-melt machine (1), characterized in that, The hot melt machine (1) has a shell (2) on top, a main frame (3) inside the shell (2), a feeder (4) at one end of the main frame (3), two air pipes (7) in the middle section of the main frame (3), and multiple crushing teeth (8) on the outside of the air pipes (7). The energy storage and ejection mechanism (5) includes a push plate (508) located in the middle section of the main frame (3), which releases energy by horizontally moving the push plate (508) to eject waste plastic; The tension mechanism (6) includes a constant tension membrane (603) located at the other end of the main frame (3), which elastically sorts the waste plastics that bounce off and collide with the constant tension membrane (603). The air film protection mechanism (9) includes multiple fixed seats (901) embedded in the outer wall of the crushing tooth (8). Multiple air outlet grooves (903) are opened on the outer wall of the fixed seat (901) around its axis. The air delivered by the air pipe (7) is discharged through the air outlet grooves (903) to form a protective air film.

2. The hot-melt device for the resource recovery of waste plastics according to claim 1, characterized in that, The energy storage projectile mechanism (5) also includes: Support frame (501), two support frames (501) are provided inside one side of the outer shell (2), and the two ends of the support frame (501) are respectively connected to the corresponding positions of the inner wall of the outer shell (2); A slide (502) is provided on the top of the support frame (501), and limit grooves (503) are provided on both outer walls of the slide (502). The slider (504) is slidably connected to the top of the slide table (502). Both sides of the slider (504) are provided with rods, and one end of the rod passes through the limiting groove (503). A reciprocating lead screw (514) is provided on one side of the slide table (502). A movable seat (515) is provided on the outside of the reciprocating lead screw (514). One side of the movable seat (515) is connected to the rod body on one side of the slider (504).

3. The hot-melt device for the resource recovery of waste plastics according to claim 2, characterized in that, The energy storage projectile mechanism (5) also includes: Impact shaft (506), which is slidably connected to the top of slider (504), and one end of impact shaft (506) is connected to the outer wall of one side of push plate (508); A baffle (505) is provided, wherein one outer wall of the baffle (505) is connected to one side of the slider (504); Telescopic rod (512), one end of which passes through the outer wall of one side of the baffle (505), and the other end of which abuts against the other end of the impact shaft (506); The second spring (513) is located outside the telescopic rod (512), and the two ends of the second spring (513) are respectively connected to the corresponding positions of the outer wall of one side of the baffle (505) and the outer wall of one end of the telescopic rod (512).

4. The hot-melt device for the resource recovery of waste plastics according to claim 3, characterized in that, The energy storage projectile mechanism (5) also includes: A locking block (507) is located at the top of one end of the impact shaft (506); A rotating frame (509) is located on the top of the slide table (502), and a rotating plate (510) is rotatably connected to the top of the rotating frame (509). The first spring (511) is located above the slide table (502). Both ends of the first spring (511) are rotatably connected to the bottom of the rotating plate (510) and the top of the slide table (502) respectively through blocks. The motor (516) is mounted on one side of the slide table (502) via a plate, and the output end of the motor (516) is connected to one end of the reciprocating lead screw (514).

5. The hot-melt device for the resource recovery of waste plastics according to claim 1, characterized in that, The tension mechanism (6) further includes: Mounting bracket (601), which is connected to one end of the main frame (3), and the constant tension membrane (603) is sleeved on the outside of the mounting bracket (601); A fixing plate (604) is connected on one side to the inner wall of the outer shell (2) at a corresponding position; A bushing (608), one end of which is connected to the other side of a fixing plate (604); Positioning seat (606), one side of which is connected to the other end of bushing (608).

6. The hot-melt device for the resource recovery of waste plastics according to claim 5, characterized in that, The tension mechanism (6) also includes: A central shaft (605) is located inside a bushing (608), and one end of the central shaft (605) passes through one side of a positioning seat (606). Connecting seats (610), a plurality of the connecting seats (610) are disposed on the outer wall of the central shaft (605) around the axis of the central shaft (605); Movable plates (612), a plurality of said movable plates (612) are disposed outside the central axis (605) around the central axis (605); Synchronizing rod (611), one end of which is rotatably connected to connecting seat (610), and the other end of which is rotatably connected to the inner wall of moving plate (612) at a corresponding position.

7. A hot-melt device for the resource recovery of waste plastics according to claim 6, characterized in that, The tension mechanism (6) further includes: Guide grooves (607), a plurality of the guide grooves (607) are formed on the outer wall of the positioning seat (606) around the axis of the positioning seat (606); Guide rod (613), the guide rod (613) is located on one side of the movable plate (612), and one end of the guide rod (613) passes through the guide groove (607); The stroke groove (609) is formed around the central shaft (605) on the outer wall of the bushing (608), and the top of the connecting seat (610) passes through the stroke groove (609); An electric push rod (602) is mounted on one side of the outer shell (2) via a plate, and the telescopic part of the electric push rod (602) is connected to one end of the central shaft (605).

8. The hot-melt device for the resource recovery of waste plastics according to claim 1, characterized in that, The air-supported membrane structure (9) also includes: Air intake slots (902), a plurality of said air intake slots (902) are formed on the inner wall of the fixed base (901) around the axis of the fixed base (901); Extrusion blocks (906), a plurality of extrusion blocks (906) are embedded inside the fixing base (901) around the axis of the fixing base (901); A connecting groove (907) is formed inside the extrusion block (906).

9. A hot-melt device for the resource recovery of waste plastics according to claim 1, characterized in that, The air-supported membrane structure (9) also includes: A floating plug (904) is disposed inside a fixed base (901); The extrusion ring (905) is sleeved on the outer wall of the floating plug (904), and the outer wall of the extrusion ring (905) abuts against the outer wall of one side of the extrusion block (906).

10. A hot-melt device for the resource recovery of waste plastics according to claim 1, characterized in that, The air-supported membrane structure (9) also includes: A motion sleeve (908) is fitted over the outside of a fixed base (901); A clearance groove (909) is provided inside the movement sleeve (908); A blocking ring (910) is sleeved on the outer wall of the moving sleeve (908); The third spring (911) is sleeved on the outside of the moving sleeve (908), and the two ends of the third spring (911) are respectively connected to the corresponding positions of the outer wall of the blocking ring (910) and the outer wall of the fixed seat (901).

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