A winnowing separation apparatus and a method of separating plastic bottle fragments from labels

Abstract

The application relates to the technical field of plastic recycling, and discloses a winnowing separation device and a separation method for removing labels from plastic bottle fragments, which comprises a device main body, a screening and crushing mechanism, a driving mechanism and a label outlet, the inside of the device main body is provided with the screening and crushing mechanism, the inside of the device main body is provided with the driving mechanism, and the bottom of the device main body is provided with the label outlet. Before the plastic bottle fragments enter the inside of a separation sleeve, the screening and crushing mechanism is used to screen the plastic bottle fragments which are not completely crushed in the plastic bottle fragments, and the driving motor can also drive the screening and crushing mechanism to secondarily crush the plastic bottle fragments which are not completely crushed during the working process. After the plastic bottle fragments are secondarily crushed, the plastic bottle fragments enter the inside of the separation sleeve, so that the problem that labels are wound on the broken plastic bottle fragments which are not completely crushed during the subsequent winnowing separation process and cause incomplete separation can be effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of plastic recycling technology, specifically to an air separation device and a method for separating plastic bottle fragments to remove labels. Background Technology

[0002] Plastic waste is not only difficult to degrade in the natural environment, but also causes pollution. Recycling plastic waste can reduce environmental pollution and prevent resource waste.

[0003] Chinese patent CN112077114B discloses an aluminum-plastic separation and recycling device, including a heating tank. The heating tank contains a paper-removing structure, which includes a reducer mounted on the upper outer wall of the heating tank, a temperature sensor mounted inside the heating tank, and several heating rods mounted on the bottom inner wall of the heating tank. Several stirring rods are mounted on a positioning plate. The heating tank is connected to the upper end of the side wall of an air classifier via a discharge structure. Several air hoods are mounted on the side wall of the air classifier, and the air hoods are connected to a second fan via a second ventilation pipe. A discharge port is located on the side wall of the air classifier opposite to the air hoods. The air classifier is connected to a reflux tank via a second discharge pipe. The lower end of the reflux tank is connected to an aluminum-plastic separation tank. A reflux hood is mounted inside the reflux tank, and the reflux hood is connected to the heating tank via a reflux pipe. A suction fan is mounted on the reflux pipe.

[0004] In the aforementioned patents and existing technologies, during the air separation of plastic bottle fragments, the plastic bottles may not be completely crushed, resulting in the plastic bottle fragments sticking together. During subsequent air separation, the labels in the plastic bottle fragments will become entangled on the plastic bottle fragments, making it difficult to separate the labels from the plastic bottle fragments. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an air separation device and a method for separating labels from plastic bottle fragments.

[0006] A wind-separation separation device and a method for separating labels from plastic bottle fragments include a device body, a screening and crushing mechanism, a driving mechanism, and a label outlet. The screening and crushing mechanism is installed inside the device body, and the driving mechanism is also installed inside the device body. The label outlet is located at the bottom of the device body. A separation sleeve is installed on the driving mechanism. A plastic bottle fragment outlet is fixedly installed on the outside of the device body. A fan is fixedly installed at the bottom of the label outlet, and a label discharge port is fixedly installed outside the fan. A device support frame is installed at the bottom of the device body, a feed trough is installed at the top of the device body, and a diverter fan is installed at the top of the device body.

[0007] The main body of the device is installed at an angle on the top of the device support frame. The exhaust fan is connected to the interior of the main body of the device through a label outlet. A plastic bottle fragment outlet is installed on the lower side of the main body of the device.

[0008] The separating sleeve is rotatably installed inside the main body of the device via a drive mechanism. The separating sleeve has an inclined structure, with the higher side of the separating sleeve facing the screening and crushing mechanism and the lower side of the separating sleeve facing the plastic bottle fragment outlet.

[0009] The screening and crushing mechanism can perform secondary crushing on the plastic bottle fragments that enter the separation sleeve. The driving mechanism can drive the separation sleeve to rotate inside the main body of the device. When the separation sleeve rotates, it can cause the plastic bottle fragments to tumble and the labels to fall from the separation sleeve into the main body of the device. The exhaust fan can suck out the labels from inside the main body of the device through the label outlet and assist in separating the plastic bottle fragments from the labels.

[0010] Preferably, a vibration motor is installed at the bottom of the main body of the device.

[0011] Preferably, the screening and crushing mechanism includes a screening body, which is fixedly installed inside the main body of the device. Inside the screening body, there is a fragment gathering block. Inside the screening body, there is a fragment diversion plate. At the top of the fragment diversion plate, there is a fragment screening pin. Inside the screening body, a horizontal connecting plate is slidably installed. At the top of the horizontal connecting plate, there is an auxiliary separation pin. At the bottom of the horizontal connecting plate, there is a transmission rack. At the bottom of the horizontal connecting plate, there is a screening separation spring. The screening body has a fragment outlet on its exterior.

[0012] Preferably, the inner side of the fragment gathering block is a concave inclined structure, the top of the fragment diversion plate is a convex structure inclined to both sides, and the top of the fragment diversion plate is connected to the fragment gathering block through a fragment screening post.

[0013] The inclined structure on the fragment gathering block allows plastic bottle fragments to fall towards the center of the fragment diversion plate, and the inclined structure on the fragment diversion plate allows plastic bottle fragments to fall towards both sides of the screening body. The fragment screening posts between the fragment diversion plate and the fragment gathering block can limit the incompletely cut plastic bottle fragments.

[0014] Preferably, the auxiliary separation pin at the top of the horizontal connecting plate extends from the bottom of the fragment diversion plate to above the fragment diversion plate, and the positions of the auxiliary separation pin and the fragment screening pin are staggered.

[0015] When the horizontal connecting plate slides left and right inside the screening body, it can drive the auxiliary separation pin to move synchronously. When the auxiliary separation pin moves, it can push and separate the plastic bottle fragments stuck on the fragment screening pin, so that the incompletely broken plastic bottle fragments are broken a second time.

[0016] Preferably, the bottom of the horizontal connecting plate is connected to the bottom of the debris diversion plate via a screening and separation spring, and the bottom of the horizontal connecting plate is connected to the external transmission of the drive mechanism via a transmission rack.

[0017] Preferably, the drive mechanism includes a motor mounting base and a transmission shaft. The motor mounting base is installed outside the main body of the device, and the transmission shaft is rotatably installed inside the main body of the device. A drive motor is mounted on the top of the motor mounting base, a motor wheel is mounted on the drive end of the drive motor, and a transmission belt is mounted on the outside of the motor wheel. A shaft wheel is mounted on one end of the transmission shaft, and a shaft mounting plate is mounted on the other end of the transmission shaft. The shaft mounting plate is installed inside the main body of the device. A sleeve connecting frame is mounted on the outside of the transmission shaft, and a transmission gear is mounted on the outside of the transmission shaft.

[0018] Preferably, one end of the transmission shaft is connected to the motor wheel outside the drive motor via a shaft pulley and a transmission belt, and the outside of the transmission shaft is fixedly connected to the separation sleeve via a sleeve connecting bracket;

[0019] The drive motor can drive the motor wheel at the drive end to rotate. When the motor wheel rotates, it can drive the transmission shaft to rotate through the transmission belt and the central shaft wheel. When the transmission shaft rotates, it can drive the separation sleeve to rotate through the sleeve connecting frame.

[0020] Preferably, the external of the transmission shaft is connected to the transmission rack at the bottom of the horizontal connecting plate via a transmission gear, and the external of the transmission gear is only provided with a half-circle retaining tooth;

[0021] When the transmission shaft rotates, it can drive the horizontal connecting plate to move through the engagement of the transmission gear and the transmission rack. When the transmission gear is not engaged with the transmission rack, the transmission shaft and the horizontal connecting plate are disconnected.

[0022] Preferably, one end of the transmission shaft is rotatably mounted inside the device body via a central shaft mounting plate, and the other end of the transmission shaft passes through the screening body and the device body and is equipped with a central shaft wheel;

[0023] When the transmission shaft rotates, it can drive the separating sleeve to rotate and separate the plastic bottle fragments and labels. At the same time, it can also drive the horizontal connecting plate to move to assist in feeding and secondary crushing of the plastic bottle fragments.

[0024] A method for separating labels from plastic bottle fragments uses the aforementioned air separation equipment.

[0025] Compared with the prior art, the present invention provides an air separation device and a separation method for removing labels from plastic bottle fragments, which has the following beneficial effects:

[0026] 1. This type of air separation equipment screens incompletely crushed plastic bottle fragments through a screening and crushing mechanism before they enter the separation sleeve. During operation, the drive motor can also drive the screening and crushing mechanism to further crush the incompletely crushed plastic bottle fragments. After the plastic bottle fragments have undergone secondary crushing, they enter the separation sleeve, which effectively prevents the label from getting tangled on the incompletely crushed plastic bottle fragments during the subsequent air separation process, thus preventing incomplete separation.

[0027] 2. In this type of air separation equipment, the separation sleeve is driven to rotate by the drive mechanism during the separation process. The rotation of the separation sleeve can not only cause the plastic bottle fragments inside to repeatedly turn over, but also make the plastic bottle fragments continuously move downward along the separation sleeve. The repeated turning over of the plastic bottle fragments can not only improve the separation effect of the labels in the plastic bottle fragments, but also prevent the plastic bottle fragments from getting stuck in the holes on the separation sleeve, thus enabling continuous air separation of plastic bottle fragments.

[0028] 3. This type of air separation equipment uses a blower to suck up and separate the labels of plastic fragments from the separation sleeve during the separation process. After collection, the labels are discharged uniformly through the label outlet. The label collection can also be carried out during the separation process to prevent the labels from scattering and causing secondary rework. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of an air separation device according to the present invention. Figure 1 ;

[0030] Figure 2 This is a three-dimensional structural diagram of an air separation device according to the present invention. Figure 2 ;

[0031] Figure 3 This is a three-dimensional structural diagram of an air separation device according to the present invention. Figure 3 ;

[0032] Figure 4 This is a three-dimensional structural diagram of an air separation device according to the present invention. Figure 4 ;

[0033] Figure 5 This is a three-dimensional structural diagram of the separation sleeve of an air separation device according to the present invention;

[0034] Figure 6 This is a three-dimensional structural schematic diagram of the screening and separation mechanism of an air separation device according to the present invention;

[0035] Figure 7 This is a schematic diagram of the internal structure of the screening and separation mechanism of an air separation device according to the present invention. Figure 1 ;

[0036] Figure 8 This is a schematic diagram of the internal structure of the screening and separation mechanism of an air separation device according to the present invention. Figure 2 ;

[0037] Figure 9 This is a three-dimensional structural diagram of the transmission mechanism of an air separation device according to the present invention. Figure 1 ;

[0038] Figure 10 This is a three-dimensional structural diagram of the transmission mechanism of an air separation device according to the present invention. Figure 2 ;

[0039] Figure 11 This is a three-dimensional structural diagram of an air separation device according to the present invention. Figure 5 .

[0040] In the diagram: 1. Main body of the device; 2. Screening and crushing mechanism; 21. Screening body; 22. Fragment gathering block; 23. Fragment diversion plate; 24. Fragment screening column; 25. Horizontal connecting plate; 26. Auxiliary separation column; 27. Transmission rack; 28. Screening separation spring; 29. ​​Fragment outlet; 3. Separation sleeve; 4. Drive mechanism; 41. Motor mounting base; 42. Drive motor; 43. Motor wheel; 44. Transmission belt; 45. Central shaft wheel; 46. Transmission central shaft; 47. Central shaft mounting plate; 48. Sleeve connecting frame; 49. Transmission gear; 5. Plastic bottle fragment outlet; 6. Label outlet; 7. Exhaust fan; 8. Label discharge port; 9. Device support frame; 10. Feed trough; 11. Diverting fan; 12. Vibration motor. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes an air separation device and a separation method for removing labels from plastic bottle fragments.

[0043] Example 1:

[0044] Please see Figure 1 - Figure 11 A wind separation device includes a main body 1, a screening and crushing mechanism 2, a driving mechanism 4, and a label outlet 6. The screening and crushing mechanism 2 is installed inside the main body 1, the driving mechanism 4 is installed inside the main body 1, the label outlet 6 is opened at the bottom of the main body 1, the separation sleeve 3 is installed on the driving mechanism 4, the plastic bottle fragment outlet 5 is fixedly installed on the outside of the main body 1, the exhaust fan 7 is fixedly installed at the bottom of the label outlet 6, the label discharge port 8 is fixedly installed on the outside of the exhaust fan 7, the device support frame 9 is installed at the bottom of the main body 1, the feed trough 10 is installed at the top of the main body 1, and the diversion fan 11 is installed at the top of the main body 1.

[0045] The main body 1 is installed at an angle on the top of the device support frame 9. The exhaust fan 7 is connected to the interior of the main body 1 through the label outlet 6. The lower side of the main body 1 is equipped with a plastic bottle fragment outlet 5.

[0046] The separating sleeve 3 is rotatably installed inside the main body 1 of the device via the drive mechanism 4. The separating sleeve 3 has an inclined structure, with the higher side of the separating sleeve 3 facing the screening and crushing mechanism 2 and the lower side of the separating sleeve 3 facing the plastic bottle fragment outlet 5.

[0047] The screening and crushing mechanism 2 can perform secondary crushing on the plastic bottle fragments that enter the separation sleeve 3. The driving mechanism 4 can drive the separation sleeve 3 to rotate inside the device body 1. When the separation sleeve 3 rotates, it can cause the plastic bottle fragments to tumble and the label to fall from the separation sleeve 3 into the device body 1. The exhaust fan 7 can suck out the label from inside the device body 1 through the label outlet 6 and assist in separating the plastic bottle fragments from the label.

[0048] During operation, plastic bottle fragments are first poured into the device through the feed inlet 10. The feed inlet 10 has two channels: the lower channel allows the plastic bottle fragments to enter the screening and crushing mechanism 2, while the upper channel allows them to directly enter the separating sleeve 3. As the plastic bottle fragments move along the feed inlet 10, the diverting fan 11 generates an upward suction force. This suction force draws the fully crushed fragments directly into the separating sleeve 3 through the upper channel of the feed inlet 10, while the partially crushed fragments enter the screening and crushing mechanism 2 through the lower channel. These partially crushed fragments become stuck inside the screening and crushing mechanism 2. During operation, the drive mechanism 4 drives the screening and crushing mechanism 2 to perform secondary crushing of the partially crushed plastic bottle fragments. After the plastic bottle fragments enter the separating sleeve 3, the drive mechanism 4 drives the separating sleeve 3... The rotating separator sleeve 3 causes the plastic bottle fragments inside to tumble. During this tumbling process, some of the labels from the plastic bottle fragments fall through the holes in the separator sleeve 3 into the main body 1 of the device. As the plastic bottle fragments move downwards along the inside of the separator sleeve 3, the exhaust fan 7 generates suction at the bottom of the separator sleeve 3 through the label outlet 6. The suction generated by the exhaust fan 7 can both discharge the labels that have fallen into the main body 1 from the label outlet 6 and perform air separation of the labels from the plastic bottle fragments. The labels sucked out by the exhaust fan 7 are discharged from the label outlet 8. The remaining plastic bottle fragments in the separator sleeve 3 continue to move along the separator sleeve 3 to the plastic bottle fragment outlet 5 and are then discharged along the plastic bottle fragment outlet 5. Before the plastic bottle fragments enter the separator sleeve 3, the screening and crushing mechanism 2 screens and performs secondary crushing on the incompletely crushed plastic bottle fragments, thereby preventing the labels from getting tangled on the incompletely crushed plastic bottle fragments during the subsequent air separation process, which would lead to incomplete separation.

[0049] In some embodiments, a vibration motor 12 is installed at the bottom of the main body of the device;

[0050] During the screening process, the vibrating motor 12 drives the main body 1 of the device and the internal separation sleeve 3 to vibrate while screening the plastic bottle fragments, which can effectively prevent the plastic bottle fragments from getting stuck during the screening process and improve the screening efficiency.

[0051] Example 2:

[0052] Please see Figure 1 - Figure 11A wind separation device includes a main body 1, a screening and crushing mechanism 2, a driving mechanism 4, and a label outlet 6. The screening and crushing mechanism 2 is installed inside the main body 1, the driving mechanism 4 is installed inside the main body 1, the label outlet 6 is opened at the bottom of the main body 1, the separation sleeve 3 is installed on the driving mechanism 4, the plastic bottle fragment outlet 5 is fixedly installed on the outside of the main body 1, the exhaust fan 7 is fixedly installed at the bottom of the label outlet 6, the label discharge port 8 is fixedly installed on the outside of the exhaust fan 7, the device support frame 9 is installed at the bottom of the main body 1, the feed trough 10 is installed at the top of the main body 1, and the diversion fan 11 is installed at the top of the main body 1.

[0053] The main body 1 is installed at an angle on the top of the device support frame 9. The exhaust fan 7 is connected to the interior of the main body 1 through the label outlet 6. The lower side of the main body 1 is equipped with a plastic bottle fragment outlet 5.

[0054] The separating sleeve 3 is rotatably installed inside the main body 1 of the device via the drive mechanism 4. The separating sleeve 3 has an inclined structure, with the higher side of the separating sleeve 3 facing the screening and crushing mechanism 2 and the lower side of the separating sleeve 3 facing the plastic bottle fragment outlet 5.

[0055] The screening and crushing mechanism 2 can perform secondary crushing on the plastic bottle fragments that enter the separation sleeve 3. The driving mechanism 4 can drive the separation sleeve 3 to rotate inside the device body 1. When the separation sleeve 3 rotates, it can cause the plastic bottle fragments to tumble and the label to fall from the separation sleeve 3 into the device body 1. The exhaust fan 7 can suck out the label from inside the device body 1 through the label outlet 6 and assist in separating the plastic bottle fragments from the label.

[0056] During operation, plastic bottle fragments are continuously poured into the screening and crushing mechanism 2. Completely crushed fragments pass through the mechanism and enter the separating sleeve 3, while incompletely crushed fragments remain inside. During operation, the drive mechanism 4 causes the screening and crushing mechanism 2 to perform secondary crushing of the incomplete fragments. After the plastic bottle fragments enter the separating sleeve 3, the drive mechanism 4 rotates the sleeve 3, causing the internal plastic bottle fragments to flip. During this flipping process, some labels from the plastic bottle fragments fall through the holes in the separating sleeve 3 into the main body 1 of the device. As the plastic bottle fragments move downwards along the inside of the separating sleeve 3... The exhaust fan 7 can generate suction at the bottom of the separating sleeve 3 through the label outlet 6. The suction generated by the exhaust fan 7 can not only discharge the labels that have fallen into the device body 1 from the label outlet 6, but also perform air separation of the labels in the plastic bottle fragments. The labels sucked out by the exhaust fan 7 are discharged from the label outlet 8. The remaining plastic bottle fragments in the separating sleeve 3 continue to move along the separating sleeve 3 to the plastic bottle fragment outlet 5, and then are discharged along the plastic bottle fragment outlet 5. Before the plastic bottle fragments enter the separating sleeve 3, the screening and crushing mechanism 2 screens and crushes the incompletely crushed plastic bottle fragments, thereby preventing the labels from getting tangled on the incompletely crushed plastic bottle fragments during the subsequent air separation process, which would lead to incomplete separation.

[0057] Example 3:

[0058] The difference from the above embodiments is that, please refer to [link / reference needed]. Figure 3 - Figure 7 The screening and crushing mechanism 2 includes a screening body 21, which is fixedly installed inside the main body 1 of the device. Inside the screening body 21, there is a fragment gathering block 22. Inside the screening body 21, there is a fragment diversion plate 23. At the top of the fragment diversion plate 23, there is a fragment screening pin 24. Inside the screening body 21, there is a horizontal connecting plate 25. At the top of the horizontal connecting plate 25, there is an auxiliary separation pin 26. At the bottom of the horizontal connecting plate 25, there is a transmission rack 27. At the bottom of the horizontal connecting plate 25, there is a screening separation spring 28. The outside of the screening body 21 has a fragment outlet 29.

[0059] The inner side of the fragment gathering block 22 is a concave inclined structure, and the top of the fragment diversion plate 23 is a convex structure that is inclined to both sides. The top of the fragment diversion plate 23 is connected to the fragment gathering block 22 through the fragment screening post 24.

[0060] The inclined structure on the fragment gathering block 22 allows plastic bottle fragments to fall towards the center of the fragment diversion plate 23. The inclined structure on the fragment diversion plate 23 allows plastic bottle fragments to fall towards both sides of the screening body 21. The fragment screening pin 24 between the fragment diversion plate 23 and the fragment gathering block 22 can limit the incompletely cut plastic bottle fragments.

[0061] The auxiliary separation pin 26 at the top of the horizontal connecting plate 25 extends from the bottom of the fragment diversion plate 23 to the top of the fragment diversion plate 23, and the positions of the auxiliary separation pin 26 and the fragment screening pin 24 are staggered.

[0062] When the horizontal connecting plate 25 slides left and right inside the screening body 21, it can drive the auxiliary separation pin 26 to move synchronously. When the auxiliary separation pin 26 moves, it can push and separate the plastic bottle fragments stuck on the fragment screening pin 24, so that the incompletely broken plastic bottle fragments are broken a second time.

[0063] The bottom of the horizontal connecting plate 25 is connected to the bottom of the fragment diversion plate 23 via the screening and separation spring 28, and the bottom of the horizontal connecting plate 25 is connected to the external transmission of the drive mechanism 4 via the transmission rack 27.

[0064] During operation, plastic bottle fragments enter the screening body 21 through the opening above it. After being gathered by the fragment gathering block 22, the fragments fall onto the fragment diversion plate 23 and then fall to both sides along the plate. During this falling process, the fragment screening pins 24 between the fragment diversion plate 23 and the fragment gathering block 22 can intercept the incompletely broken plastic bottle fragments. When the transmission shaft 46 rotates, it can also drive the horizontal connecting plate 25 to move to the left horizontally through the meshing connection of the transmission gear 49 and the transmission rack 27. When the horizontal connecting plate 25 moves to the left, the auxiliary separation pin 26 on the top left side of the horizontal connecting plate 25 can pass through the gap between the fragment screening pins 24 on the top left side of the fragment diversion plate 23. When the auxiliary separation pin 26 passes through the gap between the fragment screening pins 24, it can squeeze and pull the incompletely broken plastic bottle fragments. The fragments undergo secondary crushing, and when the horizontal connecting plate 25 moves to the left, the screening separation spring 28 is compressed. When the transmission rack 27 is no longer engaged with the transmission gear 49, the screening separation spring 28 rebounds. When the screening separation spring 28 rebounds, it can drive the horizontal connecting plate 25 to move to the right. When the horizontal connecting plate 25 moves to the right, the auxiliary separation pin 26 on the top right side of the horizontal connecting plate 25 can pass through the gap between the fragment screening pins 24 on the top right side of the fragment diversion plate 23. The plastic bottle fragments continue to fall and enter the separation sleeve 3 through the fragment outlet 29. During the rotation of the transmission shaft 46, the horizontal connecting plate 25 is repeatedly driven to move left and right to perform secondary cleaning and crushing of the incompletely crushed plastic bottle fragments stuck on the fragment screening pins 24. This effectively prevents the incompletely crushed plastic bottle fragments from entering the separation sleeve 3 and causing the label to wrap around the incompletely crushed plastic bottle fragments, affecting the air separation quality.

[0065] Example 4:

[0066] The difference from the above embodiments is that, please refer to [link / reference needed]. Figure 2 - Figure 9 The drive mechanism 4 includes a motor mounting base 41 and a transmission shaft 46. The motor mounting base 41 is installed on the outside of the device body 1, and the transmission shaft 46 is rotatably installed inside the device body 1. A drive motor 42 is installed on the top of the motor mounting base 41. A motor wheel 43 is installed on the drive end of the drive motor 42. A transmission belt 44 is installed on the outside of the motor wheel 43. A shaft wheel 45 is installed on one end of the transmission shaft 46, and a shaft mounting plate 47 is installed on the other end of the transmission shaft 46. The shaft mounting plate 47 is installed inside the device body 1. A sleeve connecting bracket 48 is installed on the outside of the transmission shaft 46, and a transmission gear 49 is installed on the outside of the transmission shaft 46.

[0067] One end of the transmission shaft 46 is connected to the motor wheel 43 outside the drive motor 42 via the shaft pulley 45 and the transmission belt 44. The outside of the transmission shaft 46 is fixedly connected to the separation sleeve 3 via the sleeve connecting bracket 48.

[0068] The drive motor 42 can drive the motor wheel 43 at the drive end to rotate. When the motor wheel 43 rotates, it can drive the transmission shaft 46 to rotate through the transmission belt 44 and the central shaft wheel 45. When the transmission shaft 46 rotates, it can drive the separation sleeve 3 to rotate through the sleeve connecting frame 48.

[0069] The external transmission shaft 46 is connected to the transmission rack 27 at the bottom of the horizontal connecting plate 25 via the transmission gear 49. The external transmission gear 49 is only provided with a half-circle retaining tooth.

[0070] When the transmission shaft 46 rotates, it can drive the horizontal connecting plate 25 to move through the engagement of the transmission gear 49 and the transmission rack 27. When the transmission gear 49 is not engaged with the transmission rack 27, the transmission shaft 46 is disconnected from the horizontal connecting plate 25.

[0071] One end of the transmission shaft 46 is rotatably mounted inside the device body 1 via the central shaft mounting plate 47, and the other end of the transmission shaft 46 passes through the screening body 21 and the device body 1 and is equipped with a central shaft wheel 45.

[0072] When the transmission shaft 46 rotates, it can drive the separating sleeve 3 to rotate to separate plastic bottle fragments and labels, and at the same time drive the horizontal connecting plate 25 to move to assist in feeding and secondary crushing of plastic bottle fragments.

[0073] When the drive motor 42 drives the motor wheel 43 to rotate during operation, it can drive the transmission shaft 46 to rotate through the transmission belt 44 and the central shaft wheel 45. When the transmission shaft 46 rotates, it can drive the separation sleeve 3 to rotate through the sleeve connecting frame 48. When the separation sleeve 3 rotates, it can tumble and mix the plastic bottle fragments. The inclined structure of the separation sleeve 3 can better move the plastic bottle fragments inside the separation sleeve 3 downwards along the separation sleeve 3 when the separation sleeve 3 rotates. When the transmission shaft 46 rotates, it can also drive the horizontal connecting plate 25 to move to one side through the meshing of the transmission gear 49 and the transmission rack 27. The transmission gear 49 is only provided with half a circle of teeth, which can leave space for the horizontal connecting plate 25 to rebound after it moves. During the air separation process, the rotation of the transmission shaft 46 drives the screening and crushing mechanism 2 to continuously feed the material, and at the same time, it can drive the separation sleeve 3 to rotate to tumble and move the plastic bottle fragments downwards along the separation sleeve 3, so as to continuously carry out the air separation of plastic bottle fragments.

[0074] Example:

[0075] A method for separating labels from plastic bottle fragments, using an air separation device as described in Examples 1 to 3, includes the following steps:

[0076] During operation, plastic bottle fragments are first fed into the screening and crushing mechanism 2, which then screens the incompletely crushed plastic bottle fragments.

[0077] Then, the drive mechanism 4 drives the screening and crushing mechanism 2 to perform secondary crushing of the incompletely crushed plastic bottles horizontally, and the drive mechanism 4 can also drive the separation sleeve 3 to rotate.

[0078] Then, as the separating sleeve 3 rotates and flips the plastic bottle fragments, the exhaust fan 7 sucks out the labels mixed in with the plastic bottle fragments from inside the separating sleeve 3;

[0079] The remaining plastic bottle fragments continue to move along the separating sleeve 3 and are finally discharged from the plastic bottle fragment outlet 5.

[0080] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air separation device, comprising a main body, a screening and crushing mechanism, a driving mechanism, and a label outlet, wherein the screening and crushing mechanism is installed inside the main body, the driving mechanism is installed inside the main body, and the label outlet is provided at the bottom of the main body, characterized in that: A separation sleeve is installed on the drive mechanism, a plastic bottle fragment outlet is fixedly installed on the outside of the main body of the device, an exhaust fan is fixedly installed at the bottom of the label outlet, a label discharge port is fixedly installed on the outside of the exhaust fan, a device support frame is installed at the bottom of the main body of the device, a feed trough is installed at the top of the main body of the device, and a diverter fan is installed at the top of the main body of the device. The main body of the device is installed at an angle on the top of the device support frame. The exhaust fan is connected to the interior of the main body of the device through the label outlet. A plastic bottle fragment outlet is installed on the lower side of the main body of the device. The separating sleeve is rotatably installed inside the main body of the device via a drive mechanism. The separating sleeve has an inclined structure, with the higher side of the separating sleeve facing the screening and crushing mechanism and the lower side of the separating sleeve facing the plastic bottle fragment outlet. The screening and crushing mechanism can perform secondary crushing on the plastic bottle fragments that enter the separation sleeve. The drive mechanism can drive the separation sleeve to rotate inside the main body of the device. When the separation sleeve rotates, it can cause the plastic bottle fragments to tumble and the labels to fall from the separation sleeve into the main body of the device. The exhaust fan can suck out the labels from inside the main body of the device through the label outlet and assist in separating the plastic bottle fragments from the labels. The screening and crushing mechanism includes a screening body, which is fixedly installed inside the main body of the device. Inside the screening body, there is a fragment gathering block. Inside the screening body, there is a fragment diversion plate. On the top of the fragment diversion plate, there is a fragment screening pin. Inside the screening body, there is a horizontal connecting plate. On the top of the horizontal connecting plate, there is an auxiliary separation pin. On the bottom of the horizontal connecting plate, there is a transmission rack. On the bottom of the horizontal connecting plate, there is a screening separation spring. On the outside of the screening body, there is a fragment outlet. The inner side of the fragment gathering block is a concave inclined structure, and the top of the fragment diversion plate is a convex structure that slopes to both sides. The top of the fragment diversion plate is connected to the fragment gathering block through the fragment screening card post. The inclined structure on the fragment gathering block allows plastic bottle fragments to fall towards the center of the fragment diversion plate. The inclined structure on the fragment diversion plate allows plastic bottle fragments to fall towards both sides of the screening body. The fragment screening posts between the fragment diversion plate and the fragment gathering block can limit the incompletely cut plastic bottle fragments. The auxiliary separation pins at the top of the horizontal connecting plate extend from the bottom of the fragment diversion plate to the top of the fragment diversion plate, and the positions of the auxiliary separation pins and the fragment screening pins are staggered. When the horizontal connecting plate slides left and right inside the screening body, it can drive the auxiliary separation pin to move synchronously. When the auxiliary separation pin moves, it can push and separate the plastic bottle fragments stuck on the fragment screening pin, so that the incompletely broken plastic bottle fragments are broken a second time. The drive mechanism drives the screening and crushing mechanism to perform secondary horizontal crushing of the incompletely crushed plastic bottles, and the drive mechanism can also drive the separation sleeve to rotate.

2. The air separation device according to claim 1, characterized in that: The bottom of the horizontal connecting plate is connected to the bottom of the debris diversion plate via a screening and separation spring, and the bottom of the horizontal connecting plate is connected to the external transmission of the drive mechanism via a transmission rack.

3. The air separation device according to claim 1, characterized in that: The drive mechanism includes a motor mounting base and a transmission shaft. The motor mounting base is installed outside the main body of the device, and the transmission shaft is rotatably installed inside the main body of the device. A drive motor is mounted on the top of the motor mounting base, and a motor wheel is mounted on the drive end of the drive motor. A transmission belt is mounted on the outside of the motor wheel. A shaft wheel is mounted on one end of the transmission shaft, and a shaft mounting plate is mounted on the other end of the transmission shaft. The shaft mounting plate is installed inside the main body of the device. A sleeve connecting frame is mounted on the outside of the transmission shaft, and a transmission gear is mounted on the outside of the transmission shaft.

4. The air separation device according to claim 3, characterized in that: One end of the transmission shaft is connected to the motor wheel outside the drive motor via the shaft pulley and the transmission belt. The outside of the transmission shaft is fixedly connected to the separation sleeve via the sleeve connecting bracket. The drive motor can drive the motor wheel at the drive end to rotate. When the motor wheel rotates, it can drive the transmission shaft to rotate through the transmission belt and the central shaft wheel. When the transmission shaft rotates, it can drive the separation sleeve to rotate through the sleeve connecting frame.

5. The air separation device according to claim 4, characterized in that: The external transmission shaft is connected to the transmission rack at the bottom of the horizontal connecting plate via a transmission gear, and the external transmission gear is only provided with a half-circle retaining tooth. When the transmission shaft rotates, it can drive the horizontal connecting plate to move through the engagement of the transmission gear and the transmission rack. When the transmission gear is not engaged with the transmission rack, the transmission shaft and the horizontal connecting plate are disconnected.

6. The air separation device according to claim 5, characterized in that: One end of the transmission shaft is rotatably mounted inside the device body via a central shaft mounting plate, and the other end of the transmission shaft passes through the screening body and the device body and is equipped with a central shaft wheel. When the transmission shaft rotates, it can drive the separating sleeve to rotate and separate the plastic bottle fragments and labels. At the same time, it can also drive the horizontal connecting plate to move to assist in feeding and secondary crushing of the plastic bottle fragments.

7. A method for separating labels from plastic bottle fragments, using an air separation device as described in any one of claims 1-6.

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