A plastic separation and recycling device and a method for separating labels from crushed plastics

Abstract

The present invention discloses a plastic separation and recovery device and a processing method for separating labels from crushed plastics, which relates to the field of plastic recovery devices and includes an air separation box, an air separation air pump installed on the air separation box, an air separation plate, a hard discharge frame, and a soft discharge frame installed in the air separation box, wherein the air separation air pump uses airflow to make soft plastics pass through the air separation plate and fall into the soft discharge frame, and the hard plastics in the air separation box can fall into the hard discharge frame, a selection conveyor belt is provided on one side of the air separation box, the soft discharge frame is provided above one end of the selection conveyor belt, and a cleaning component and several selection components are provided on the selection conveyor belt. The soft plastics and hard plastics can be further separated, the degree of separation is improved, further processing is facilitated, the cleaning hole and the discharge hole can be prevented from being blocked, the continuous operation of the equipment is ensured, and the selection efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of plastic recycling devices, and in particular to a plastic separation and recycling device and a processing method for separating labels from crushed plastics. Background Art

[0002] Plastic recycling requires collecting the plastic first. The collected waste plastic needs to be sorted to separate different types of plastics, and then cleaned to remove contaminants on the surface and inside of the waste plastic, including grease, dust, and attachments. Cleaning can be done physically, such as water washing and vibration cleaning, or chemically, such as solvent cleaning. The waste plastic is then crushed. The waste plastic is fed into a crusher to break it into small particles or flakes. The size of these particles can be adjusted according to specific needs. The dried waste plastic is then melted into a liquid through heating and pressure. A melter or extruder is usually used for the melting process before granulation or molding.

[0003] Chinese patent CN103029232B discloses a plastic bottle label separation and recovery 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 drive and a belt drive, the gear drive mechanism includes a partial gear fixedly connected to the motor reducer, a center transmission gear, and an edge transmission gear, a clamping mechanism fixedly connected to the center gear shaft via a rotating arm, and an ejection mechanism connected to the edge gear via a belt. The ejection mechanism is fixedly connected to the side of the frame through the support frame, and a guide slide is provided in the frame directly below the ejection 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, comprising a shell, a flattening mechanism, a feeding mechanism, a blowing assembly and a separation mechanism; the feeding mechanism is used to convey the aluminum-plastic panel to be separated to the inner cavity of the shell; the flattening mechanism is arranged above the feeding mechanism, and is suitable for flattening the aluminum-plastic panel placed on the feeding mechanism; the blowing assembly is installed on the top of the shell and blows a high-pressure airflow downward toward the inner cavity; the separation mechanism receives the flattened aluminum-plastic panel through a penetrating placement cavity and heats it to a set temperature, and blows out and separates the plastic layer through the high-pressure airflow, thereby separating the plastic and the aluminum panel by heating and high-pressure airflow; compared with the traditional method, the present application only needs to directly heat and blow, which can effectively reduce pollution to the environment; at the same time, the structure is compact and the implementation is simple, and it can be widely used.

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

[0006] In the prior art, plastic bottles 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 with the plastic bottles for recycling, it is easy to cause molding difficulties and they need to be separated. In the prior art, air separation is used to separate the shredded hard plastic and the soft plastic labels. However, the hard plastic with smaller volume and mass is easily air-separated into the soft plastic by the airflow, resulting in poor separation effect of soft plastic and hard plastic, and poor utilization rate of plastic recycling.

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

[0008] The purpose of this application is to provide a plastic separation and recovery device and a processing method for separating labels after plastic crushing, which can further separate soft plastics and hard plastics, improve the degree of separation, 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-mentioned objectives, the present application provides the following technical solutions: a plastic separation and recovery device, comprising an air separation box, an air separation air pump installed on the air separation box, an air separation plate, a hard discharge frame, and a soft discharge frame installed in the air separation box, the air separation air pump uses airflow to cause soft plastic to pass through the air separation plate and fall into the soft discharge frame, and the hard plastic in the air separation box can fall into the hard discharge frame;

[0010] A selection conveyor belt is provided on one side of the air separation box, the soft material discharging frame is provided above one end of the selection conveyor belt, and a cleaning component and a plurality of selection components are provided on the selection conveyor belt;

[0011] The selecting assembly includes a negative pressure unit and two selecting units, the selecting unit includes a selecting box, a blanking frame and a plurality of cleaning rods, the selecting box is located above the selecting conveyor belt, the blanking frame is connected to the selecting box, a plurality of selecting holes are opened at the bottom of the selecting box, a plurality of cleaning rods are slidably fitted on the top of the selecting box, the negative pressure unit includes a negative pressure box and a negative pressure air pump, the negative pressure air pump is connected to the negative pressure box, the negative pressure box is fixedly installed on the two blanking frames in the same selecting assembly, and the blanking frame is provided with a plurality of negative pressure holes at positions corresponding to the negative pressure box;

[0012] The selecting unit also includes a cleaning plate, which is abutted against the inner wall of the negative pressure hole corresponding to the blanking 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 of the cleaning rods downward, so that the cleaning rods move into the corresponding selecting holes. After that, the moving block continues to move to move the cleaning plate 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, 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 discharge frame. The closing cover is fixedly mounted with a rotating shaft, which is rotatably connected to the discharge 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 discharge 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 discharge 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 movable plate, a movable bar, a movable screw and a movable motor, the movable screw is fixedly mounted on the output end of the movable motor, the movable bar is sleeved on the movable screw and threadedly connected to the movable screw, the movable plate is fixedly mounted on the movable bar, and the movable block is fixedly mounted on the movable 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 mounted on the bottom of the moving block, the selecting unit also includes a pushing block and a pushing plate, the pushing plate is fixedly mounted on the top of several of the cleaning rods, the pushing block is fixedly mounted 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 also includes a plurality of return springs and return torsion springs, and 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, and 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.

[0019] Preferably, the cleaning belt member includes a driving pulley, a passive pulley and a cleaning belt, 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.

[0020] Preferably, the air separation box is provided with a feed inlet, the air separation box is fixedly installed with a guide plate, the guide strip is fixedly installed on the guide plate, the air outlet hood is fixedly installed in the air separation box, the output end of the air separation air pump is connected to the air outlet hood, the bottom 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, and a vibrator is fixedly installed on the vibration screen plate, and the vibration screen plate is located above one end of the selection conveyor belt, a fixing frame is fixedly installed on the fixing frame, a selection motor is fixedly installed on the fixing frame, a selection roller is rotatably connected on the fixing 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, and air inlets are provided on both sides of the fixed frame corresponding to the selection box positions, and sealing plates are fixedly installed between several of the selection boxes.

[0021] A method for separating labels from shredded plastics, using the aforementioned plastic separation and recovery device, comprises the following steps:

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

[0023] The air pump flows air into the air separation box and blows the plastic in the air separation box. The soft plastic with lower quality is blown by the air flow over the air separation plate into the soft discharge frame, while the hard plastic with higher quality falls into the hard discharge frame.

[0024] Some smaller hard plastics follow the air flow into the soft discharge frame, and the materials in the soft discharge frame fall onto the selection conveyor belt and move along with the selection conveyor belt;

[0025] The negative pressure air pump pumps the inside of the selection box to negative pressure. The materials on the selection conveyor belt move toward the selection box under the action of the air flow. 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.

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

[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, and the cleaning rod enters the selection hole, closing the selection box. The airflow in the selection box disappears, and the soft plastic loses the push of the airflow and falls out of the discharge frame;

[0028] 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 blanking frame downward to discharge the material.

[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 sucked through the selection hole by negative pressure, while the hard plastic cannot be deformed and is blocked, which can further separate the soft plastic from the hard plastic, improve the degree of separation, and facilitate further processing. The soft plastic and the airflow are separated through the blanking hole on the blanking frame. At the same time, the movement of the moving block can push the cleaning rod to move downward, and the cleaning rod pushes out the hard plastic stuck in the selection hole. Then the movement of the moving block pushes the cleaning plate downward, and the cleaning plate pushes out the soft plastic on the blanking frame. Because the selection hole on the selection box is blocked by the cleaning rod, the negative pressure in the selection box and the blanking frame disappears, and the soft plastic in the blanking hole opened on the blanking frame falls out, which can prevent the cleaning hole and the blanking hole 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 material to move, and the selection holes on the selection box attract the material on the selection conveyor belt through the air flow. The air flow enters through the air inlet. The air flow entering the air inlet can blow the material on both sides of the material to move, preventing some lightweight plastics from being always pressed at the bottom of the material, thereby increasing the selection effect;

[0032] 3. In the present invention, when the cleaning plate moves downward, the cleaning plate drives the push rod to move downward, and the push rod pushes the closing cover to rotate. The closing cover detaches from the closing frame and rotates to the inclined plate position and causes the force-storage torsion spring to store force, so that the material in the discharge frame is discharged through the closing cover and the inclined plate. After that, the cleaning plate and the push rod are reset, and the force-storage torsion spring drives the closing cover to reset and counteract the closing frame, sealing the discharge frame, forming a negative pressure in the discharge frame and the selection box, and being able to attract the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 It is a structural schematic diagram of the air separation box, the air separation air pump and the fixing frame in the present invention;

[0035] Figure 2 This is a schematic diagram of the structure of the wind selection box, selection components and collection box in the present invention;

[0036] Figure 3 It is a structural schematic diagram of the wind selection plate, the hard discharging frame and the soft discharging frame in the present invention;

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

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

[0039] Figure 6 This is a schematic structural diagram of the push plate, push block, selection box and cleaning rod in the present invention;

[0040] Figure 7 Schematic diagram of the structure of the movable screw and the movable motor in the present invention;

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

[0042] Figure 9 It is a structural schematic diagram of the selection conveyor belt, fixed frame and selection box in the present invention;

[0043] Figure 10 Schematic diagram of the structure of the selected 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;

[0045] Figure 12 It is a structural schematic diagram of the blanking frame, the closing cover and the closing frame in the present invention;

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

[0047] Figure 14It is a structural schematic diagram of the vibrating screen 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, selection component; 61, negative pressure unit; 611, negative pressure box; 612, negative pressure air pump; 621, selection box; 622, discharge frame; 623, cleaning rod; 624, cleaning plate; 625, cleaning screw; 626, cleaning belt; 627, cleaning transmission rod; 628, passive bevel gear; 629, active bevel gear; 630, one-way ratchet; 631, push rod; 632, closing cover; 633, closing frame; 634, tilt Plate; 635, storage torsion spring; 636, push block; 637, push plate; 638, reset spring; 639, reset torsion spring; 7, cleaning assembly; 71, moving block; 72, moving plate; 73, moving bar; 74, moving screw; 75, moving motor; 76, moving rack; 8, sealing plate; 9, selection conveyor belt; 10, collection box; 11, rolling rod; 12, guide plate; 13, air outlet cover; 14, rubber block; 15, vibration spring; 16, vibration screen plate; 17, vibrator; 18, fixed frame; 19, selection motor; 20, selection roller. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0050] Example 1: Reference Figures 1-14 The plastic separation and recovery device shown in the figure includes an air separation box 1, an air separation air pump 2 installed on the air separation box 1, and an air separation plate 3, a hard discharge frame 4, and a soft discharge frame 5 installed in the air separation box 1. The air separation air pump 2 uses airflow to cause the soft plastic to pass through the air separation plate 3 and fall into the soft discharge frame 5, and the hard plastic in the air separation box 1 can fall into the hard discharge frame 4;

[0051] A selection conveyor belt 9 is provided on one side of the air separation box 1, and a soft material discharge frame 5 is provided above one end of the selection conveyor belt 9. A cleaning component 7 and a plurality of selection components 6 are provided on the selection conveyor belt 9;

[0052] The selection assembly 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 plurality of cleaning rods 623. The selection box 621 is located above the selection conveyor belt 9. The blanking frame 622 is connected to the selection box 621. A plurality of selection holes are opened at the bottom of the selection box 621. A plurality 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 connected to the negative pressure box 611. The negative pressure box 611 is fixedly installed on the two blanking frames 622 in the same selection assembly 6. The blanking frame 622 is provided with a plurality of negative pressure holes corresponding to the position of the negative pressure box 611.

[0053] The selection unit also includes a cleaning plate 624, which is against the inner wall of the negative pressure hole corresponding to the blanking frame 622. The cleaning component 7 includes a moving block 71, which can move horizontally. When the moving block 71 corresponds to the selection component 6 position, the movement of the moving block 71 can push several cleaning rods 623 to move downward, so that the cleaning rods 623 move to the corresponding selection hole, and then the moving block 71 continues to move to enable the cleaning plate 624 to move downward.

[0054] The shredded plastic is passed into the air separation box 1, and the air separation air pump 2 flows air into the air separation box 1 and blows the plastic in the air separation box 1. The soft plastic has lower quality and is blown by the air flow over the air separation plate 3 into the soft discharge frame 5. The hard plastic has higher quality and falls into the hard discharge frame 4. Some hard plastics with smaller quality follow the air flow into the soft discharge frame 5. The materials in the soft discharge frame 5 fall onto the selection conveyor belt 9 and move with the selection conveyor belt 9. The negative pressure air pump 612 pumps the selection box 621 to negative pressure. The materials on the selection conveyor belt 9 move toward the selection box 621 under the action of the air flow. Because the soft plastic is under the action of the air pressure The material is deformed and enters the selection box 621 through the selection hole. The hard plastic is stuck in the selection hole. The soft plastic in the selection box 621 follows the airflow into the blanking frame for blanking. 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 to move downward. The cleaning rod 623 enters the selection hole and closes the selection box 621. The airflow in the selection box 621 disappears, and the soft plastic loses the push of the airflow and falls out of the blanking frame 622. After that, the moving block 71 pushes the cleaning plate 624 to move downward. The cleaning plate 624 pushes the material corresponding to the negative pressure hole on the inner wall of the blanking frame 622 downward for blanking.

[0055] The soft plastic is adsorbed through the selection hole 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 degree of separation, and facilitate further processing. The soft plastic and the airflow are separated through the discharge hole on the discharge frame 622. At the same time, the movement of the moving block 71 can push the cleaning rod 623 to move downward, and the cleaning rod 623 pushes out the hard plastic stuck in the selection hole. Then the moving block 71 moves to push the cleaning plate 624 to move downward, and the cleaning plate 624 pushes out the soft plastic on the discharge frame 622. Because the selection hole on the selection box 621 is blocked by the cleaning rod 623, the negative pressure in the selection box 621 and the discharge frame 622 disappears, and the soft plastic in the discharge hole opened on the discharge frame 622 falls down and discharges, which can prevent the cleaning hole and the discharge hole from being blocked, ensure the continuous operation of the equipment, and improve the selection efficiency.

[0056] Example 2, reference Figures 1-13 , which is different from the above embodiment, is that the selection unit further includes a cleaning screw 625, a cleaning belt 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 passes through the cleaning plate 624 and is threadedly connected to the cleaning plate 624. The cleaning screw 625 is rotatably connected to the blanking frame 622. The top of the cleaning screw 625 passes through the blanking frame 622. The cleaning transmission rod 627 is rotatably connected to the blanking frame 62 2, the cleaning belt member 626 is connected to the cleaning screw 625 and the cleaning transmission rod 627, the passive bevel gear 628 is fixedly mounted on the cleaning transmission rod 627, the active bevel gear 629 is fixedly mounted on the fixed shaft, the fixed frame is fixedly mounted on the blanking frame 622, the fixed shaft is rotatably connected to the fixed frame, and the one-way ratchet 630 is fixedly mounted on the fixed 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 626, the cleaning plate 624 moves downward on the cleaning screw 625, and the cleaning plate 624 cleans the blanking frame 622.

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

[0059] Example 3, reference Figures 1-13, different from the above 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 blanking frame 622. A rotating shaft is fixedly installed on the closing cover 632, and the rotating shaft is rotatably connected to the blanking 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 blanking 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 blanking 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 position of the inclined plate 634, and causes the force-storing torsion spring 635 to store force, so that the material in the discharge 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, sealing the discharge frame 622, and forming a negative pressure in the discharge frame 622 and the selection box 621.

[0061] Example 4, with reference to Figures 1-13 , which is different from the above embodiment, is that a support block is fixedly installed in the blanking 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 pushing rod 631 passes through the support block and the closing frame 633 and slides with the support block and the closing frame 633, and the selecting unit also includes a collecting box 10, which is detachably connected to the bottom of the blanking 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 embodiment, is that 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, reference Figures 1-13 , which is different from the above embodiment, the four corners of the moving block 71 are rotatably connected to the rolling rod 11, the cleaning assembly 7 also includes a moving rack 76, and the moving rack 76 is fixedly installed at the bottom of the moving block 71. The selecting unit also includes a pushing block 636 and a pushing plate 637. The pushing plate 637 is fixedly installed on the top of several cleaning rods 623, and the pushing block 636 is fixedly installed on the top of the pushing plate 637. The cross-section of the pushing block 636 is a right trapezoidal setting, and the cross-section of the moving block 71 is an inverted trapezoidal setting.

[0066] The moving block 71 moves and squeezes the push block 636 to move downward, the pushing block 636 squeezes the push plate 637 to move downward, and the pushing plate 637 squeezes the cleaning rod 623 to move downward. At the same time, the moving block 71 drives the moving rack 76 to move. When the cleaning rod 623 moves 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 moving rack 76 moves and drives the one-way ratchet 630 to rotate, thereby moving the cleaning plate 624 downward, pushing the material in the discharge frame 622 downward to discharge.

[0067] Example 7, reference Figures 1-13 , which is different from the above embodiment, the selection unit also includes a plurality of return springs 638 and return torsion springs 639. The plurality of return springs 638 are respectively arranged at the four corners of the push plate 637. One end of the return spring 638 is fixedly mounted on the push plate 637, and the other end of the return spring 638 is fixedly mounted on the selection box 621. The return spring 638 is sleeved on the corresponding cleaning rod 623, one end of the return torsion spring 639 is fixedly mounted on the fixing frame, and the other end of the return torsion spring 639 is fixedly mounted on the fixed shaft.

[0068] When the moving block 71 moves away from the pushing block 636, the reset spring 638 resets and drives the pushing plate 637 to move upward, and the pushing plate 637 drives the cleaning rod 623 to reset upward, and the selecting hole on the selecting box 621 is opened to attract the soft plastic to be discharged. 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] Example 8, reference Figures 1-13 , which is different from the above embodiment, is that the cleaning belt member 626 includes a driving pulley, a passive pulley and a cleaning belt, the driving pulley is fixedly mounted on the cleaning transmission rod 627, the passive pulley is fixedly mounted on the cleaning screw 625, and the cleaning belt is connected to the driving pulley and the passive pulley.

[0070] When the cleaning transmission rod 627 rotates, it drives the active pulley to rotate, the active pulley drives the cleaning belt to move, the cleaning belt causes the passive pulley to rotate, and the passive pulley causes the cleaning screw 625 to rotate, so that the cleaning plate 624 moves on the cleaning screw 625.

[0071] By adjusting the wheel diameters of the active pulley and the passive pulley, the transmission ratio can be changed, so that when the movable rack 76 drives the one-way ratchet 630 to rotate, the cleaning plate 624 can move to clean the area of ​​the negative pressure hole on the discharge hole.

[0072] Example 9, reference Figures 1-13 , which is different from the above embodiment, is that a feed port is provided on the air separation box 1, a guide plate 12 is fixedly installed in the air separation box 1, a guide strip is fixedly installed on the guide plate 12, an air outlet cover 13 is fixedly installed in the air separation box 1, the output end of the air separation air pump 2 is connected to the air outlet cover 13, the bottoms of the soft discharge frame 5 and the hard discharge frame 4 are both opened, a rubber block 14 and a vibration spring 15 are fixedly installed in the soft discharge frame 5, a vibration screen plate 16 is fixedly installed on the top of the rubber block 14 and the vibration spring 15, and a plurality of vibration screen plates 16 are provided on the vibration screen plate 16. sieve holes, a vibrator 17 is fixedly installed on the vibrating screen plate 16, the vibrating screen plate 16 is located above one end of the selecting conveyor belt 9, a fixed frame 18 is fixedly installed on the air separation box 1, a selecting motor 19 is fixedly installed on the fixed frame 18, a selecting roller 20 is rotatably connected to the fixed frame 18, the selecting conveyor belt 9 is sleeved on the selecting roller 20, the output end of the selecting motor 19 is fixedly installed on the selecting roller 20, air inlets are opened on both sides of the fixed frame 18 corresponding to the positions of the selecting boxes 621, and sealing plates 8 are fixedly installed between several selecting boxes 621.

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

[0074] A method for separating labels from shredded plastics, using the aforementioned plastic separation and recovery device, comprises the following steps:

[0075] The shredded plastic is passed into the air separation box 1;

[0076] The air pump 2 draws air into the air separation box 1 and blows the plastic inside the air separation box 1. The soft plastic with lower quality is blown by the air flow over the air separation plate 3 and into the soft discharge frame 5. The hard plastic with higher quality falls into the hard discharge frame 4.

[0077] Some smaller hard plastics follow the air flow into the soft discharge frame 5, and the materials in the soft discharge frame 5 fall onto the selection conveyor belt 9 and move along with the selection conveyor belt 9;

[0078] The negative pressure pump 612 pumps the inside of the selection box 621 to a negative pressure. The materials on the selection conveyor belt 9 move toward the selection box 621 under the action of the airflow. The soft plastic is deformed under the action of the air pressure and enters the selection box 621 through the selection hole, while the hard plastic is stuck in the selection hole.

[0079] The soft plastic in the 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 to move downward. The cleaning rod 623 enters the selection hole and closes the selection box 621. The airflow in the selection box 621 disappears, and the soft plastic loses the push of the airflow and falls out of the blanking frame 622.

[0081] Then the moving block 71 pushes the cleaning plate 624 to move downward, and the cleaning plate 624 pushes the materials corresponding to the negative pressure holes on the inner wall of the blanking frame 622 downward to discharge the materials.

[0082] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

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

3. The plastic separation and recovery device according to claim 2, characterized in that: The selecting 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 discharge frame. A rotating shaft is fixedly mounted on the closing cover, and the rotating shaft is rotatably connected to the discharge 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 discharge 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 discharge frame, and the inclined plate is arranged below the closing cover.

4. The plastic separation and recovery device according to claim 3, characterized in that: A support block is fixedly installed in the blanking 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 pushing rod passes through the support block and the closing frame and slides with the support block and the closing frame, and the selecting unit also includes a collecting box, which is detachably connected to the bottom of the blanking frame.

5. The 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. The 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, which is fixedly mounted on the bottom of the moving block. The selecting unit also includes a pushing block and a pushing plate. The pushing plate is fixedly mounted on the top of several cleaning rods. The pushing block is fixedly mounted 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. The plastic separation and recovery device according to claim 6, characterized in that: The selection unit also includes several return springs and return torsion springs. Several 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 fixing frame, and the other end of the return torsion spring is fixedly mounted on the fixed shaft.

8. The plastic separation and recovery device according to claim 7, characterized in that: The cleaning belt member includes a driving pulley, a passive pulley and a cleaning belt. 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. The plastic separation and recovery device according to claim 8, characterized in that: The air separation box is provided with a feed inlet, the air separation box is fixedly installed with a guide plate, the guide strip is fixedly installed on the guide plate, the 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 bottom 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, and a vibrator is fixedly installed on the vibration screen plate, and the vibration screen plate is located above one end of the selecting conveyor belt, a fixing frame is fixedly installed on the fixing frame, 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, and air inlets are provided on both sides of the fixing frame corresponding to the selecting box positions, and sealing plates are fixedly installed between several of the selecting boxes.

10. A method for separating labels from crushed plastics, using the plastic separation and recovery device according to 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 with lower quality is blown by the air flow over the air separation plate into the soft discharge frame, while the hard plastic with higher quality falls into the hard discharge frame. Some smaller hard plastics follow the air flow into the soft discharge frame, and the materials in the soft discharge frame fall onto the selection conveyor belt and move along with the selection conveyor belt; The negative pressure air pump pumps the inside of the selection box to negative pressure. The materials on the selection conveyor belt move toward the selection box under the action of the air flow. 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 position of the cleaning rod, the moving block pushes the cleaning rod downward, and the cleaning rod enters the selection hole, closing the selection box. The airflow in the selection box disappears, and the soft plastic loses the push of the airflow and falls out of the 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 blanking frame downward to discharge the material.

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