Plastic separation and recovery device and treatment method for label separation after plastic crushing

Abstract

The invention discloses a plastic separating and recycling device and a treatment method for label separation after plastic smashing, and relates to the field of plastic recycling devices.The plastic separating and recycling device comprises a winnowing box, a winnowing air pump is installed on the winnowing box, and a winnowing plate, a hard discharging frame and a soft discharging frame are installed in the winnowing box; the winnowing air pump enables soft plastics to fall into the soft discharging frame through the winnowing plate through airflow, hard plastics in the winnowing box can fall into the hard discharging frame, a fine selection conveying belt is arranged on one side of the winnowing box, the soft discharging frame is arranged above one end of the fine selection conveying belt, and the other end of the fine selection conveying belt is connected with the winnowing plate. And a cleaning assembly and a plurality of fine selection assemblies are arranged on the fine selection conveying belt. Soft plastic and hard plastic can be further separated, the separation degree is improved, further machining is facilitated, the cleaning hole and the discharging hole can be prevented from being blocked, continuous work of equipment is guaranteed, and the selection efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of plastic recycling devices, and particularly to a plastic separation and recycling device and a processing method for separating labels after plastic crushing. Background Art

[0002] The recycling of plastics requires collecting plastics first. The collected waste plastics need to be sorted to separate different types of plastics, and then washed. Washing is to remove contaminants on the surface and inside of the waste plastics, including grease, dust, attachments, etc. Washing can be carried out by physical methods such as water washing and vibration washing, or chemical methods such as solvent washing. After that, the plastics are crushed. The waste plastics are fed into a crusher and broken into small particles or small flakes. The size of these small particles can be adjusted according to specific requirements. Then, through heating and pressurization, the dried waste plastics are melted into a liquid state. Usually, a melting machine or an extruder is used for the melting process and then granulation or molding is carried out.

[0003] Chinese Patent CN103029232B discloses a plastic bottle label separation and recycling device, including a frame, a support frame, a power mechanism, a cutting mechanism, and a transmission mechanism. The power mechanism is a motor reducer. The cutting mechanism includes a cutting motor and a cutting knife fixedly connected to the motor shaft. The transmission mechanism is a gear transmission and a belt transmission. The gear transmission mechanism includes partial gears fixedly connected to the motor reducer, a central transmission gear, and an edge transmission gear. A clamping mechanism is fixedly connected to the central gear shaft through a rotating arm. A jacking mechanism is connected to the edge gear through a belt. The jacking mechanism is fixedly connected to the side of the frame through the support frame. A guiding slide rail is provided in the frame directly below the jacking structure. The operation is simple, and separation and collection are integrated.

[0004] Chinese Patent CN118124045B discloses a plastic separation and recycling device for construction waste, including a housing, a flattening mechanism, a feeding mechanism, a blowing assembly, and a separation mechanism. The feeding mechanism is used to convey the aluminum-plastic board to be separated into the inner cavity of the housing. The flattening mechanism is arranged above the feeding mechanism and is suitable for flattening the aluminum-plastic board placed on the feeding mechanism. The blowing assembly is installed on the top of the housing and blows high-pressure air downward into the inner cavity. The separation mechanism receives the flattened aluminum-plastic board through a through placement cavity and heats it to a set temperature to blow out and separate the plastic layer through the high-pressure air. By means of heating and high-pressure air, the plastic is separated from the aluminum plate. Compared with the traditional method, the present application can directly carry out heating and blowing, which can effectively reduce environmental pollution. At the same time, the structure is compact and the implementation is simple, and it can be widely applied.

[0005] The above patents and the prior art also have the following defects:

[0006] Plastic bottles in the prior art are often provided with plastic labels. The plastic labels are relatively soft and inconsistent with the material of the plastic bottles. If they are mixed in the plastic bottles for recycling, it is easy to cause difficult molding and they need to be separated. In the prior art, air separation is used to separate the shredded hard plastics and soft plastic labels. However, the hard plastics with small volume and mass are easily air-separated into the soft plastics by the air flow, resulting in poor separation effect between the soft plastics and the hard plastics and poor utilization rate of plastic recycling.

[0007] Therefore, the present application provides a plastic separation and recycling device and a processing method for separating labels after plastic crushing to meet the requirements. Summary of the Invention

[0008] The purpose of the present application is to provide a plastic separation and recycling device and a processing method for separating labels after plastic crushing, which can further separate soft plastics and hard plastics, improve the separation degree, facilitate further processing, prevent the cleaning holes and feeding holes from being blocked, ensure the continuous operation of the equipment, and improve the selection efficiency.

[0009] To achieve the above purpose, the present application provides the following technical solutions: A plastic separation and recycling device includes an air separation box, an air separation air pump is installed on the air separation box, an air separation plate, a hard plastic discharge frame and a soft plastic discharge frame are installed in the air separation box. The air separation air pump enables the soft plastics to fall into the soft plastic discharge frame through the air separation plate by air flow, and the hard plastics in the air separation box can fall into the hard plastic discharge frame;

[0010] A selection conveyor belt is arranged on one side of the air separation box, the soft plastic discharge frame is arranged above one end of the selection conveyor belt, and a cleaning component and several selection components are arranged on the selection conveyor belt;

[0011] The selection component includes a negative pressure unit and two selection units. The selection unit includes a selection box, a feeding frame and several cleaning rods. The selection box is located above the selection conveyor belt, the feeding frame is communicated with the selection box, several selection holes are opened at the bottom of the selection box, and several cleaning rods are slidably matched on the top of the selection box. The negative pressure unit includes a negative pressure box and a negative pressure air pump. The negative pressure air pump is communicated with the negative pressure box. The negative pressure box is fixedly installed on the two feeding frames in the same selection component, and several negative pressure holes are opened at the positions of the feeding frames corresponding to the negative pressure box;

[0012] The selection unit further includes a cleaning plate, the cleaning plate abuts against the inner wall of the feeding frame corresponding to the negative pressure hole. The cleaning component includes a moving block, and the moving block can move horizontally. When the moving block corresponds to the position of the selection component, the movement of the moving block can push several cleaning rods to move downward, so that the cleaning rods move into the corresponding selection holes, and then the continuous movement of the moving block can make the cleaning plate move downward.

[0013] Preferably, the selecting unit also includes a cleaning screw, a cleaning belt, a cleaning transmission rod, a passive bevel gear, an active bevel gear, a fixed frame, a fixed shaft and a one-way ratchet, the cleaning screw passes through the cleaning plate and is threadedly connected to the cleaning plate, the cleaning screw is rotatably connected to the blanking frame, the top of the cleaning screw passes through the blanking frame, the cleaning transmission rod is rotatably connected to the blanking frame, the cleaning belt is connected to the cleaning screw and the cleaning transmission rod, the passive bevel gear is fixedly mounted on the cleaning transmission rod, the active bevel gear is fixedly mounted on the fixed shaft, the fixed frame is fixedly mounted on the blanking frame, the fixed shaft is rotatably connected to the fixed frame, and the one-way ratchet is fixedly mounted on the fixed shaft, and when the moving block moves to the corresponding cleaning component position and continues to move, the moving block can drive the one-way ratchet to rotate.

[0014] Preferably, the selection unit also includes a pushing rod, a closing cover, a closing frame, an inclined plate and a force storage torsion spring. The closing frame is fixedly mounted on the inner wall of the unloading frame. A rotating shaft is fixedly mounted on the closing cover, and the rotating shaft is rotatably connected to the unloading frame. One end of the force storage torsion spring is fixedly mounted on the rotating shaft, and the other end is fixedly mounted on the unloading frame. The pushing rod is fixedly mounted on the cleaning plate, and the bottom of the pushing rod is against the closing cover. The inclined plate is fixedly mounted in the unloading frame, and the inclined plate is arranged below the closing cover.

[0015] Preferably, a support block is fixedly installed in the discharge frame, the bottom of the cleaning screw is rotatably connected to the support block, the top of the support block and the closing frame are both inclined, the push rod passes through the support block and the closing frame and slides with the support block and the closing frame, and the selection unit also includes a collection box, which is detachably connected to the bottom of the discharge frame.

[0016] Preferably, the cleaning assembly also includes a moving plate, a moving bar, a moving screw and a moving motor, the moving screw is fixedly mounted on the output end of the moving motor, the moving bar is sleeved on the moving screw and threadedly connected to the moving screw, the moving plate is fixedly mounted on the moving bar, and the moving block is fixedly mounted on the moving plate.

[0017] Preferably, rolling rods are rotatably connected at the four corners of the moving block, the cleaning assembly also includes a moving rack, the moving rack is fixedly installed at the bottom of the moving block, the selection unit also includes a pushing block and a pushing plate, the pushing plate is fixedly installed on the top of several of the cleaning rods, the pushing block is fixedly installed on the top of the pushing plate, the cross-section of the pushing block is a regular trapezoidal setting, and the cross-section of the moving block is an inverted trapezoidal setting.

[0018] Preferably, the selection unit further includes a plurality of the return springs and return torsion springs. The plurality of return springs are respectively arranged at the four corners of the push plate. One end of each return spring is fixedly installed on the push plate, and the other end of each return spring is fixedly installed on the selection box. Each return spring is sleeved on the corresponding cleaning rod. One end of the return torsion spring is fixedly installed on the fixed frame, and the other end of the return torsion spring is fixedly installed on the fixed shaft.

[0019] Preferably, the cleaning belt member includes a driving belt pulley, a driven belt pulley and a cleaning belt. The driving belt pulley is fixedly installed on the cleaning transmission rod, the driven belt pulley is fixedly installed on the cleaning screw rod, and the cleaning belt is connected between the driving belt pulley and the driven belt pulley.

[0020] Preferably, a feed inlet is formed in the air separation box. A guiding plate is fixedly installed in the air separation box. Guiding strips are fixedly installed on the guiding plate. An air outlet hood is fixedly installed in the air separation box. The output end of the air separation air pump is communicated with the air outlet hood. The bottoms of the soft discharge frame and the hard discharge frame are both provided with openings. A rubber block and a vibration spring are fixedly installed in the soft discharge frame. A vibration sieve plate is fixedly installed at the tops of the rubber block and the vibration spring. A plurality of sieve holes are formed in the vibration sieve plate. A vibrator is fixedly installed on the vibration sieve plate. The vibration sieve plate is located above one end of the selection conveyor belt. A fixed frame is fixedly installed on the air separation box. A selection motor is fixedly installed on the fixed frame. A selection roller is rotatably connected to the fixed frame. The selection conveyor belt is sleeved on the selection roller. The output end of the selection motor is fixedly installed on the selection roller. Air inlets are formed in two sides of the fixed frame corresponding to the positions of the selection boxes. A sealing plate is fixedly installed between the plurality of selection boxes.

[0021] A processing method for separating labels after plastic crushing uses the above plastic separation and recycling device, and includes the following steps:

[0022] Feeding the shredded plastic into the air separation box;

[0023] The air separation air pump feeds air into the air separation box and blows the plastic in the air separation box. The soft plastic has a lower mass and is blown by the air flow over the air separation plate and into the soft discharge frame. The hard plastic has a higher mass and falls into the hard discharge frame;

[0024] Some hard plastics with a smaller mass enter the soft discharge frame together with the air flow. The materials in the soft discharge frame fall onto the selection conveyor belt and move together with the selection conveyor belt;

[0025] The negative pressure air pump evacuates the selection box to a negative pressure. The materials on the selection conveyor belt move towards the selection box under the action of the air flow. Due to the deformation of the soft plastic under the action of air pressure, it enters the selection box through the selection holes, while the hard plastic gets stuck in the selection holes.

[0026] The soft plastic in the selection box follows the air flow into the blanking frame for blanking.

[0027] The moving block moves horizontally. When the moving block moves to the position of the cleaning rod, the moving block pushes the cleaning rod downward. The cleaning rod enters the selection holes, closes the selection box, the air flow in the selection box disappears, and the soft plastic loses the push of the air flow and falls out of the blanking frame.

[0028] After that, the moving block pushes the cleaning plate downward, and the cleaning plate pushes the materials corresponding to the negative pressure holes on the inner wall of the blanking frame downward for blanking.

[0029] In summary, the technical effects and advantages of the present invention are as follows:

[0030] 1. In the present invention, the soft plastic is adsorbed through the selection holes by negative pressure, while the hard plastic cannot deform and is blocked, which can further separate the soft plastic and the hard plastic, improve the separation degree, and facilitate further processing. The soft plastic and the air flow are separated through the blanking holes on the blanking frame. At the same time, when the moving block moves, it can push the cleaning rod downward. The cleaning rod pushes out the hard plastic stuck in the selection holes. After that, the moving block moves and pushes the cleaning plate downward. The cleaning plate pushes out the soft plastic on the blanking frame. Since the selection holes on the selection box are blocked by the cleaning rod, the negative pressure in the selection box and the blanking frame disappears, and the soft plastic in the blanking holes on the blanking frame falls out for blanking, which can prevent the cleaning holes and the blanking holes from being blocked, ensure the continuous operation of the equipment, and improve the selection efficiency.

[0031] 2. In the present invention, the selection conveyor belt drives the materials to move. The selection holes on the selection box attract the materials on the selection conveyor belt through the air flow. The air flow enters through the air inlet. The air flow entering through the air inlet can blow the materials on both sides of the materials to move, preventing some light plastics from always being pressed at the bottom of the materials and increasing the selection effect.

[0032] 3. In the present invention, when the cleaning plate moves downward, the cleaning plate drives the pushing rod to move downward. The pushing rod pushes the closing cover to rotate. The closing cover disengages from the closing frame and rotates to the position of the inclined plate, and the energy storage torsion spring is energized. The materials in the blanking frame are discharged through the closing cover and the inclined plate. After that, the cleaning plate and the pushing rod reset, and the energy storage torsion spring drives the closing cover to reset and abut against the closing frame to seal the blanking frame, so that a negative pressure is formed in the blanking frame and the selection box, and the materials can be attracted. Description of the Drawings

[0033] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0034] Figure 1 Structural schematic diagram of the air separation box, air separation air pump and fixed frame in the present invention;

[0035] Figure 2 Structural schematic diagram of the air separation box, fine selection component and collection box in the present invention;

[0036] Figure 3 Structural schematic diagram of the air separation plate, hard discharge frame and soft discharge frame in the present invention;

[0037] Figure 4 Structural schematic diagram of the negative pressure box and negative pressure air pump in the present invention;

[0038] Figure 5 For the present invention Figure 4 Enlarged view of part A in;

[0039] Figure 6 Structural schematic diagram of the push plate, push block, fine selection box and cleaning rod in the present invention;

[0040] Figure 7 Structural schematic diagram of the moving screw and moving motor in the present invention;

[0041] Figure 8 For the present invention Figure 7 Enlarged view of part B in;

[0042] Figure 9 Structural schematic diagram of the fine selection conveyor belt, fixed frame and fine selection box in the present invention;

[0043] Figure 10 Structural schematic diagram of the fine selection conveyor belt, fixed frame and push plate in the present invention;

[0044] Figure 11 For the present invention Figure 10 Enlarged view of part C in;

[0045] Figure 12 Structural schematic diagram of the blanking frame, closing cover and closing frame in the present invention;

[0046] Figure 13 For the present invention Figure 12 Enlarged view of part D in;

[0047] Figure 14This is a schematic structural diagram of the vibrating sieve plate and the vibrator in the present invention.

[0048] In the figure: 1, air separation box; 2, air separation air pump; 3, air separation plate; 4, hard discharge frame; 5, soft discharge frame; 6, fine selection assembly; 61, negative pressure unit; 611, negative pressure box; 612, negative pressure air pump; 621, fine selection box; 622, blanking frame; 623, cleaning rod; 624, cleaning plate; 625, cleaning screw; 626, cleaning belt member; 627, cleaning transmission rod; 628, passive bevel gear; 629, active bevel gear; 630, one-way ratchet; 631, pushing rod; 632, closing cover; 633, closing frame; 634, inclined plate; 635, energy storage torsion spring; 636, pushing block; 637, pushing plate; 638, return spring; 639, return torsion spring; 7, cleaning assembly; 71, moving block; 72, moving plate; 73, moving strip; 74, moving screw; 75, moving motor; 76, moving rack; 8, sealing plate; 9, fine selection conveyor belt; 10, collection box; 11, rolling rod; 12, guiding plate; 13, air outlet hood; 14, rubber block; 15, vibration spring; 16, vibrating sieve plate; 17, vibrator; 18, fixed frame; 19, fine selection motor; 20, fine selection roller. Specific embodiments

[0049] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0050] Example 1: Refer to Figures 1 - 14 A plastic separation and recycling device shown in the figure, including an air separation box 1, an air separation air pump 2 is installed on the air separation box 1, an air separation plate 3, a hard discharge frame 4 and a soft discharge frame 5 are installed in the air separation box 1, and the air separation air pump 2 enables the soft plastic to fall into the soft discharge frame 5 through the air separation plate 3 by air flow, and the hard plastic in the air separation box 1 can fall into the hard discharge frame 4;

[0051] A fine selection conveyor belt 9 is arranged on one side of the air separation box 1, the soft discharge frame 5 is arranged above one end of the fine selection conveyor belt 9, and a cleaning assembly 7 and several fine selection assemblies 6 are arranged on the fine selection conveyor belt 9;

[0052] The selected component 6 includes a negative pressure unit 61 and two selection units. The selection unit includes a selection box 621, a blanking frame 622, and a number of cleaning rods 623. The selection box 621 is located above the selection conveyor belt 9. The blanking frame 622 is communicated with the selection box 621. A number of selection holes are opened at the bottom of the selection box 621. A number of cleaning rods 623 are slidably fitted on the top of the selection box 621. The negative pressure unit 61 includes a negative pressure box 611 and a negative pressure air pump 612. The negative pressure air pump 612 is communicated with the negative pressure box 611. The negative pressure box 611 is fixedly installed on the two blanking frames 622 in the same selected component 6. A number of negative pressure holes are opened at the positions of the blanking frames 622 corresponding to the negative pressure box 611;

[0053] The selection unit further includes a cleaning plate 624. The cleaning plate 624 abuts against the inner wall of the blanking frame 622 corresponding to the negative pressure hole. The cleaning component 7 includes a moving block 71. The moving block 71 can move horizontally. When the moving block 71 corresponds to the position of the selected component 6, the movement of the moving block 71 can push a number of cleaning rods 623 to move downward, so that the cleaning rods 623 move into the corresponding selection holes, and then the continuous movement of the moving block 71 can make the cleaning plate 624 move downward.

[0054] The shredded plastic is fed into the air separation box 1. The air separation air pump 2 feeds air into the air separation box 1 and blows the plastic in the air separation box 1. The quality of the soft plastic is lower, and it is blown by the air flow over the air separation plate 3 and into the soft material discharge frame 5. The quality of the hard plastic is higher, and it falls into the hard material discharge frame 4. Some hard plastics with smaller quality also follow the air flow into the soft material discharge frame 5. The materials in the soft material discharge frame 5 fall onto the selection conveyor belt 9 and move together with the selection conveyor belt 9. The negative pressure air pump 612 evacuates the selection box 621 to negative pressure. The materials on the selection conveyor belt 9 move towards the selection box 621 under the action of the air flow. Because the soft plastic deforms under the action of the air pressure and passes through the selection holes into the selection box 621, the hard plastic gets stuck in the selection holes. The soft plastic in the selection box 621 follows the air flow into the blanking frame and is discharged. The moving block 71 moves horizontally. When the moving block 71 moves to the position of the cleaning rod 623, the moving block 71 pushes the cleaning rod 623 downward, and the cleaning rod 623 enters the selection hole, closing the selection box 621. The air flow in the selection box 621 disappears, and the soft plastic loses the push of the air flow and falls and discharges from the blanking frame 622. Then the moving block 71 pushes the cleaning plate 624 downward, and the cleaning plate 624 pushes the materials on the inner wall of the blanking frame 622 corresponding to the negative pressure hole downward for discharging.

[0055] The soft plastic is adsorbed through the selected holes by negative pressure, while the hard plastic cannot be deformed and is blocked, which can further separate the soft plastic and the hard plastic, improve the separation degree, and facilitate further processing. The soft plastic and the air flow are separated through the material discharging holes on the material discharging frame 622. At the same time, when the moving block 71 moves, it can push the cleaning rod 623 downward. The cleaning rod 623 pushes out the hard plastic stuck in the selected holes. Then, when the moving block 71 moves and pushes the cleaning plate 624 downward, the cleaning plate 624 pushes out the soft plastic on the material discharging frame 622. Since the selected holes on the selected box 621 are blocked by the cleaning rod 623, the negative pressure in the selected box 621 and the material discharging frame 622 disappears, and the soft plastic in the material discharging holes opened on the material discharging frame 622 falls out, which can prevent the cleaning holes and the material discharging holes from being blocked, ensure the continuous operation of the equipment, and improve the selection efficiency.

[0056] Example 2, referring to Figures 1 - 13 , which is different from the above embodiment in that the selection unit further includes a cleaning screw 625, a cleaning belt member 626, a cleaning transmission rod 627, a passive bevel gear 628, an active bevel gear 629, a fixing frame, a fixing shaft and a one-way ratchet 630. The cleaning screw 625 penetrates through the cleaning plate 624 and is threadedly connected to the cleaning plate 624. The cleaning screw 625 is rotatably connected to the material discharging frame 622. The top of the cleaning screw 625 penetrates through the material discharging frame 622. The cleaning transmission rod 627 is rotatably connected to the material discharging frame 622. The cleaning belt member 626 is connected between the cleaning screw 625 and the cleaning transmission rod 627. The passive bevel gear 628 is fixedly installed on the cleaning transmission rod 627. The active bevel gear 629 is fixedly installed on the fixing shaft. The fixing frame is fixedly installed on the material discharging frame 622. The fixing shaft is rotatably connected to the fixing frame. The one-way ratchet 630 is fixedly installed on the fixing shaft. When the moving block 71 moves to the corresponding cleaning component 7 position and continues to move, the moving block 71 can drive the one-way ratchet 630 to rotate.

[0057] The moving block 71 drives the one-way ratchet 630 to rotate. The one-way ratchet 630 drives the fixed rod to rotate. The fixed rod drives the active bevel gear 629 to rotate. The active bevel gear 629 drives the passive bevel gear 628 to rotate. The passive bevel gear 628 drives the cleaning transmission rod 627 to rotate. The cleaning transmission rod 627 drives the cleaning screw 625 to rotate through the cleaning belt member 626. The cleaning plate 624 moves downward on the cleaning screw 625, and the cleaning plate 624 cleans the material discharging frame 622.

[0058] Then the moving block 71 moves in the reverse direction. The moving block 71 drives the one-way ratchet 630 to rotate, but the one-way ratchet 630 does not drive the fixed rod to rotate. The moving block 71 resets. The one-way ratchet 630 is a prior art and will not be described in detail here.

[0059] Example 3, referring to Figures 1 - 13, which is different from the above-mentioned embodiment, the selection unit also includes a pushing rod 631, a closing cover 632, a closing frame 633, an inclined plate 634 and a force storage torsion spring 635. The closing frame 633 is fixedly installed on the inner wall of the unloading frame 622. A rotating shaft is fixedly installed on the closing cover 632, and the rotating shaft is rotatably connected to the unloading frame 622. One end of the force storage torsion spring 635 is fixedly installed on the rotating shaft, and the other end is fixedly installed on the unloading frame 622. The pushing rod 631 is fixedly installed on the cleaning plate 624, and the bottom of the pushing rod 631 is against the closing cover 632. The inclined plate 634 is fixedly installed in the unloading frame 622, and the inclined plate 634 is arranged below the closing cover 632.

[0060] When the cleaning plate 624 moves downward, the cleaning plate 624 drives the pushing rod 631 to move downward, and the pushing rod 631 pushes the closing cover 632 to rotate, and the closing cover 632 detaches from the closing frame 633 and rotates to the inclined plate 634 position, and causes the force-storing torsion spring 635 to store force, so that the material in the unloading frame 622 is discharged through the closing cover 632 and the inclined plate 634, and then the cleaning plate 624 and the pushing rod 631 are reset, and the force-storing torsion spring 635 drives the closing cover 632 to reset and counteract the closing frame 633, thereby sealing the unloading frame 622 and forming a negative pressure in the unloading frame 622 and the selection box 621.

[0061] Example 4, reference Figures 1 - 13 , which is different from the above-mentioned embodiment, is that a support block is fixedly installed in the unloading frame 622, the bottom of the cleaning screw 625 is rotatably connected to the support block, the tops of the support block and the closing frame 633 are both inclined, the push rod 631 passes through the support block and the closing frame 633 and slidably cooperates with the support block and the closing frame 633, and the selection unit also includes a collection box 10, which is detachably connected to the bottom of the unloading frame 622.

[0062] The top of the support block and the closing frame 633 are tilted so that no material remains. The material on the closing cover 632 and the tilted plate 634 enters the collecting box 10 and is collected.

[0063] Example 5, reference Figures 1 - 13 , which is different from the above-mentioned embodiment, the cleaning component 7 also includes a moving plate 72, a moving bar 73, a moving screw 74 and a moving motor 75. The moving screw 74 is fixedly mounted on the output end of the moving motor 75, the moving bar 73 is sleeved on the moving screw 74 and is threadedly connected to the moving screw 74, the moving plate 72 is fixedly mounted on the moving bar 73, and the moving block 71 is fixedly mounted on the moving plate 72.

[0064] The moving motor 75 drives the moving screw 74 to rotate, the moving bar 73 moves on the moving screw 74, the moving bar 73 drives the moving plate 72 to move, and the moving plate 72 drives the moving block 71 to move.

[0065] Example 6, referenceFigures 1 - 13 , different from the above embodiments, rolling rods 11 are rotatably connected to the four corners of the moving block 71. The cleaning assembly 7 further includes a moving rack 76 fixedly installed at the bottom of the moving block 71. The selection unit further includes a pushing block 636 and a pushing plate 637. The pushing plate 637 is fixedly installed at the top of several cleaning rods 623. The pushing block 636 is fixedly installed at the top of the pushing plate 637. The cross-section of the pushing block 636 is trapezoidal, and the cross-section of the moving block 71 is inverted trapezoidal.

[0066] The moving block 71 moves to squeeze the pushing block 636 to move downward. The pushing block 636 squeezes the pushing plate 637 to move downward. The pushing plate 637 squeezes the cleaning rods 623 to move downward. At the same time, the moving block 71 drives the moving rack 76 to move. When the cleaning rods 623 move downward to close the selection box 621, the moving block 71 drives the moving rack 76 to move and engage with the one-way ratchet 630. The movement of the moving rack 76 drives the one-way ratchet 630 to rotate, so that the cleaning plate 624 moves downward to push the materials in the blanking frame 622 downward for discharging.

[0067] Embodiment 7, referring to Figures 1 - 13 , different from the above embodiments, the selection unit further includes several reset springs 638 and reset torsion springs 639. Several reset springs 638 are respectively arranged at the four corners of the pushing plate 637. One end of the reset spring 638 is fixedly installed on the pushing plate 637, and the other end of the reset spring 638 is fixedly installed on the selection box 621. The reset spring 638 is sleeved on the corresponding cleaning rod 623. One end of the reset torsion spring 639 is fixedly installed on the fixed frame, and the other end of the reset torsion spring 639 is fixedly installed on the fixed shaft.

[0068] When the moving block 71 moves away from the pushing block 636, the reset spring 638 resets to drive the pushing plate 637 to move upward. The pushing plate 637 drives the cleaning rods 623 to reset upward. The selection holes on the selection box 621 are opened to attract the soft plastic to discharge. When the moving rack 76 moves away from the one-way ratchet 630, the moving rack 76 drives the fixed shaft to rotate, and the fixed shaft drives the cleaning plate 624 to reset upward.

[0069] Embodiment 8, referring to Figures 1 - 13 , different from the above embodiments, the cleaning belt member 626 includes a driving pulley, a driven pulley and a cleaning belt. The driving pulley is fixedly installed on the cleaning transmission rod 627. The driven pulley is fixedly installed on the cleaning screw 625. The cleaning belt is connected between the driving pulley and the driven pulley.

[0070] When the cleaning transmission rod 627 rotates, it drives the driving pulley to rotate. The driving pulley drives the cleaning belt to move. The cleaning belt makes the driven pulley rotate. The driven pulley makes the cleaning screw 625 rotate, causing the cleaning plate 624 to move on the cleaning screw 625.

[0071] By adjusting the diameters of the driving pulley and the driven pulley, the transmission ratio can be changed, so that during the process of the moving rack 76 driving the one-way ratchet wheel 630 to rotate, the cleaning plate 624 can move to clean the area of the negative pressure hole on the blanking hole.

[0072] Example 9, referring to Figures 1 - 13 , which is different from the above embodiment in that a feed inlet is provided on the air separation box 1. A guiding plate 12 is fixedly installed in the air separation box 1. A guiding strip is fixedly installed on the guiding plate 12. An air outlet hood 13 is fixedly installed in the air separation box 1. The output end of the air separation air pump 2 is communicated with the air outlet hood 13. The bottoms of the soft discharge frame 5 and the hard discharge frame 4 are both provided with openings. A rubber block 14 and a vibration spring 15 are fixedly installed in the soft discharge frame 5. The top of the rubber block 14 and the vibration spring 15 is fixedly installed with a vibration sieve plate 16. A plurality of sieve holes are provided on the vibration sieve plate 16. A vibrator 17 is fixedly installed on the vibration sieve plate 16. The vibration sieve plate 16 is located above one end of the fine selection conveyor belt 9. A fixed frame 18 is fixedly installed on the air separation box 1. A fine selection motor 19 is fixedly installed on the fixed frame 18. A fine selection roller 20 is rotatably connected to the fixed frame 18. The fine selection conveyor belt 9 is sleeved on the fine selection roller 20. The output end of the fine selection motor 19 is fixedly installed on the fine selection roller 20. Air inlets are provided on both sides of the fixed frame 18 corresponding to the position of the fine selection box 621. A sealing plate 8 is fixedly installed between a plurality of fine selection boxes 621.

[0073] The material enters the air separation box 1 through the feed inlet and falls onto the guiding plate 12. It moves towards the hard discharge frame 4 under the guidance of the guiding strip. The air outlet hood 13 is located below the hard discharge frame 4. The air separation air pump 2 sprays the air flow through the air outlet hood 13. The air flow blows the soft plastics in the falling materials on the air separation plate 3 onto the air separation plate 3 and they fall onto the vibration sieve plate 16 through the air separation plate 3. The vibrator 17 vibrates the vibration sieve plate 16. The vibrator 17 is a prior art. The fine materials in the materials fall through the sieve holes on the vibration sieve plate 16. The remaining materials fall onto the fine selection conveyor belt 9 through the vibration sieve plate 16. The fine selection motor 19 drives the fine selection roller 20 to rotate. The fine selection roller 20 drives the fine selection conveyor belt 9 to move. The fine selection conveyor belt 9 drives the materials to move. The fine selection holes on the fine selection box 621 attract the materials on the fine selection conveyor belt 9 through the air flow. The air flow enters through the air inlets. The air flow entering through the air inlets can blow the materials on both sides of the materials to move, preventing some light plastics from always being pressed at the bottom of the materials and increasing the fine selection effect.

[0074] A processing method for separating labels after plastic crushing uses the above plastic separation and recycling device, including the following steps:

[0075] Feed the shredded plastic into the air separation box 1;

[0076] The air separation air pump 2 feeds air into the air separation box 1 and blows the plastic inside the air separation box 1. The soft plastic has a lower mass and is blown by the air flow over the air separation plate 3 and into the soft material discharge frame 5. The hard plastic has a higher mass and falls into the hard material discharge frame 4;

[0077] Some hard plastics with a smaller mass enter the soft material discharge frame 5 along with the air flow. The material in the soft material discharge frame 5 falls onto the fine selection conveyor belt 9 and moves along with the fine selection conveyor belt 9;

[0078] The negative pressure air pump 612 evacuates the fine selection box 621 to a negative pressure. The material on the fine selection conveyor belt 9 moves towards the fine selection box 621 under the action of the air flow. Since the soft plastic deforms under the action of the air pressure and passes through the fine selection holes into the fine selection box 621, and the hard plastic gets stuck in the fine selection holes;

[0079] The soft plastic in the fine selection box 621 follows the air flow into the blanking frame for blanking;

[0080] The moving block 71 moves horizontally. When the moving block 71 moves to the position of the cleaning rod 623, the moving block 71 pushes the cleaning rod 623 downward. The cleaning rod 623 enters the fine selection holes, closes the fine selection box 621, the air flow in the fine selection box 621 disappears, and the soft plastic loses the push of the air flow and falls out of the blanking frame 622;

[0081] After that, the moving block 71 pushes the cleaning plate 624 downward, and the cleaning plate 624 pushes the material corresponding to the negative pressure holes on the inner wall of the blanking frame 622 downward for blanking.

[0082] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A plastic separation and recovery device, comprising an air separation box, characterized in that: The air selection box is equipped with an air selection pump, and an air selection plate, a hard material discharging frame and a soft material discharging frame are installed in the air selection box. The air selection pump uses airflow to make the soft plastic pass through the air selection plate and fall into the soft material discharging frame, and the hard plastic in the air selection box can fall into the hard material discharging frame. A selection conveyor belt is arranged on one side of the winnowing box, the soft material discharging frame is arranged above one end of the selection conveyor belt, and a cleaning component and a plurality of selection components are arranged on the selection conveyor belt; The selection assembly includes a negative pressure unit and two selection units, the selection unit includes a selection box, a material discharge frame and a plurality of cleaning rods, the selection box is located above the selection conveyor belt, the material discharge frame is connected with the selection box, a plurality of selection holes are opened at the bottom of the selection box, a plurality of cleaning rods are slidably fitted on the top of the selection box, the negative pressure unit includes a negative pressure box and a negative pressure air pump, the negative pressure air pump is connected with the negative pressure box, the negative pressure box is fixedly installed on the two material discharge frames in the same selection assembly, and a plurality of negative pressure holes are opened at the position of the material discharge frame corresponding to the negative pressure box; The selecting unit also includes a cleaning plate, which is against the inner wall of the negative pressure hole corresponding to the unloading frame. The cleaning component includes a moving block, which can move horizontally. When the moving block corresponds to the selecting component position, the movement of the moving block can push several cleaning rods to move downward, so that the cleaning rods move to the corresponding selecting holes, and then the moving block continues to move to move the cleaning plate downward.

2. A plastic separation and recovery device according to claim 1, characterized in that: The selecting unit also includes a cleaning screw, a cleaning belt, a cleaning transmission rod, a passive bevel gear, an active bevel gear, a fixed frame, a fixed shaft and a one-way ratchet. The cleaning screw passes through the cleaning plate and is threadedly connected to the cleaning plate. The cleaning screw is rotatably connected to the blanking frame. The top of the cleaning screw passes through the blanking frame. The cleaning transmission rod is rotatably connected to the blanking frame. The cleaning belt is connected to the cleaning screw and the cleaning transmission rod. The passive bevel gear is fixedly mounted on the cleaning transmission rod, the active bevel gear is fixedly mounted on the fixed shaft, the fixed frame is fixedly mounted on the blanking frame, the fixed shaft is rotatably connected to the fixed frame, and the one-way ratchet is fixedly mounted on the fixed shaft. When the moving block moves to the corresponding cleaning component position and continues to move, the moving block can drive the one-way ratchet to rotate.

3. A plastic separation and recovery device according to claim 2, characterized in that: The selection unit also includes a push rod, a closing cover, a closing frame, an inclined plate and a force storage torsion spring. The closing frame is fixedly mounted on the inner wall of the unloading frame. A rotating shaft is fixedly mounted on the closing cover, and the rotating shaft is rotatably connected to the unloading frame. One end of the force storage torsion spring is fixedly mounted on the rotating shaft, and the other end is fixedly mounted on the unloading frame. The push rod is fixedly mounted on the cleaning plate, and the bottom of the push rod is against the closing cover. The inclined plate is fixedly mounted in the unloading frame, and the inclined plate is arranged below the closing cover.

4. A plastic separation and recovery device according to claim 3, characterized in that: A support block is fixedly installed in the unloading frame, the bottom of the cleaning screw is rotatably connected to the support block, the tops of the support block and the closing frame are both inclined, the push rod passes through the support block and the closing frame and slides with the support block and the closing frame, and the selection unit also includes a collection box, which is detachably connected to the bottom of the unloading frame.

5. A plastic separation and recovery device according to claim 4, characterized in that: The cleaning assembly also includes a moving plate, a moving bar, a moving screw and a moving motor. The moving screw is fixedly mounted on the output end of the moving motor, the moving bar is sleeved on the moving screw and is threadedly connected to the moving screw, the moving plate is fixedly mounted on the moving bar, and the moving block is fixedly mounted on the moving plate.

6. A plastic separation and recovery device according to claim 5, characterized in that: The four corners of the moving block are rotatably connected with rolling rods, the cleaning assembly also includes a moving rack, and the moving rack is fixedly installed at the bottom of the moving block. The selection unit also includes a pushing block and a pushing plate, and the pushing plate is fixedly installed on the top of several cleaning rods, and the pushing block is fixedly installed on the top of the pushing plate. The cross-section of the pushing block is a regular trapezoidal setting, and the cross-section of the moving block is an inverted trapezoidal setting.

7. A plastic separation and recovery device according to claim 6, characterized in that: The selection unit also includes a plurality of return springs and return torsion springs. The plurality of return springs are respectively arranged at the four corners of the push plate. One end of the return spring is fixedly mounted on the push plate, and the other end of the return spring is fixedly mounted on the selection box. The return spring is sleeved on the corresponding cleaning rod. One end of the return torsion spring is fixedly mounted on the fixed frame, and the other end of the return torsion spring is fixedly mounted on the fixed shaft.

8. A plastic separation and recovery device according to claim 7, characterized in that: The cleaning belt member comprises a driving pulley, a passive pulley and a cleaning belt, wherein the driving pulley is fixedly mounted on the cleaning transmission rod, the passive pulley is fixedly mounted on the cleaning screw, and the cleaning belt is connected to the driving pulley and the passive pulley.

9. A plastic separation and recovery device according to claim 8, characterized in that: The air separation box is provided with a feeding port, a guide plate is fixedly installed in the air separation box, a guide strip is fixedly installed on the guide plate, an air outlet hood is fixedly installed in the air separation box, the output end of the air separation air pump is connected with the air outlet hood, the bottoms of the soft discharging frame and the hard discharging frame are both opened, a rubber block and a vibration spring are fixedly installed in the soft discharging frame, a vibration screen plate is fixedly installed on the top of the rubber block and the vibration spring, a plurality of sieve holes are provided on the vibration screen plate, a vibrator is fixedly installed on the vibration screen plate, the vibration screen plate is located above one end of the selecting conveyor belt, a fixing frame is fixedly installed on the air separation box, a selecting motor is fixedly installed on the fixing frame, a selecting roller is rotatably connected to the fixing frame, the selecting conveyor belt is sleeved on the selecting roller, the output end of the selecting motor is fixedly installed on the selecting roller, air inlets are provided on both sides of the fixing frame corresponding to the selecting box positions, and sealing plates are fixedly installed between the plurality of selecting boxes.

10. A method for separating labels from crushed plastics, using the plastic separation and recovery device as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Pass the shredded plastic into the air separation box; The air pump flows air into the air separation box and blows the plastic in the air separation box. The soft plastic has a lower quality and is blown by the air flow over the air separation plate into the soft discharge frame. The hard plastic has a higher quality and falls into the hard discharge frame. Some hard plastics with smaller mass follow the air flow into the soft discharging frame, and the materials in the soft discharging frame fall onto the selection conveyor belt and move along with the selection conveyor belt; The negative pressure air pump draws negative pressure into the selection box, and the materials on the selection conveyor belt move toward the selection box under the action of the airflow. Because the soft plastic is deformed under the action of the air pressure, it enters the selection box through the selection hole, and the hard plastic is stuck in the selection hole. The soft plastic in the selection box follows the air flow into the unloading frame for unloading; The moving block moves horizontally. When the moving block moves to the cleaning rod position, the moving block pushes the cleaning rod to move downward. The cleaning rod enters the selection hole, closes the selection box, and the airflow in the selection box disappears. The soft plastic loses the push of the airflow and falls out of the material discharge frame. Then the moving block pushes the cleaning plate to move downward, and the cleaning plate pushes the material corresponding to the negative pressure hole on the inner wall of the unloading frame downward to unload the material.

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