Label stripping device for waste PET bottle and PET bottle recycling process

Abstract

The application relates to a waste PET bottle label peeling device and a PET bottle recycling process, and relates to the technical field of plastic recycling.The device comprises a feeding system, a pre-distributing system, a crushing system, a rack and a label blowing system.The feeding direction of the feeding system is directed to the pre-distributing system.The crushing system comprises a peeling box, a peeling power device, a reciprocating power device and a peeling device.The peeling device is provided with two layers.The peeling device comprises reciprocating resistance rollers and peeling rollers.The reciprocating resistance rollers and the two peeling rollers are rotatably arranged on the peeling box.The peeling rollers are arranged on the two sides of the reciprocating resistance rollers.The peeling power device is in transmission connection with the peeling rollers.The reciprocating power device is in transmission connection with the reciprocating resistance rollers.The feeding system is in transmission connection with the peeling power device.The surface of the reciprocating resistance rollers is provided with a rubber resistance surface.The reciprocating resistance rollers reciprocate.The label blowing system is directed to the lower side of the peeling rollers.The rack is provided with a staggering device.The staggering device drives the peeling rollers to slide along the axial direction, so that the peeling rate is improved.

Description

Technical Field

[0001] This invention relates to the field of plastic recycling technology, and in particular to a label peeling device for waste PET bottles and a PET bottle recycling process. Background Technology

[0002] The recycling and processing of waste PET bottles begins with label removal, which is mainly done by a label remover. This equipment uses the mechanical action generated by a high-speed rotating spindle and alloy blades to remove the bottle label, and uses a wind-powered separation chamber to automatically separate the label from the bottle, achieving a label removal rate of over 97%.

[0003] After the labels are removed, the PET bottles undergo a complete recycling process. This mainly includes crushing, which breaks the whole bottle into flakes; deep cleaning, which removes impurities, oil, and adhesive residue through multiple stages of processes such as hot alkaline washing, friction washing, and rinsing; and deep sorting, which separates the bottle cap (PE) from the bottle flakes (PET) using density differences (such as water flotation), and removes foreign matter through color sorting and air sorting. The cleaned bottle flakes are then dried and granulated, and can be reused to produce fiber, packaging, and other products. Currently, advanced integrated production lines can achieve high-cleanliness processing to meet the stringent standards for food-grade recycled plastics.

[0004] Existing label removal equipment still has the problem of not being able to remove labels, requiring manual removal. Summary of the Invention

[0005] To overcome the technical defects of existing technologies, this invention provides a waste PET bottle label peeling device and a PET bottle recycling process to improve the peeling rate.

[0006] The technical solution adopted in this invention is:

[0007] A label peeling device for waste PET bottles, characterized in that it includes a feeding system, a pre-splitting system, a crushing system, a frame, and a label blowing system. The feeding system feeds in the direction of the pre-splitting system. The crushing system includes a peeling box, a peeling power unit, a reciprocating power unit, and a peeling device. The peeling device has two layers. The upper peeling device includes a peeling roller and two reciprocating resistance rollers. The two reciprocating resistance rollers in the upper peeling device are located on both sides of the peeling roller. The linear velocity of the two reciprocating resistance rollers closer to the peeling roller is downward. The rotational speeds of the reciprocating resistance rollers and the peeling roller are different, with the peeling roller rotating at a higher speed than the reciprocating resistance roller. The lower peeling device includes a reciprocating guide roller and two... There are two peeling rollers. The reciprocating guide roller of the lower peeling device is a smooth roller. Two peeling rollers are located on both sides of the reciprocating guide roller. The reciprocating resistance roller and the peeling roller are rotatably mounted on the peeling box. The peeling power device is driven by each peeling roller. The reciprocating power device is mounted on the peeling box and is driven by the peeling roller and the reciprocating guide roller. The reciprocating power device drives the upper peeling roller and the lower reciprocating guide roller to slide axially on the peeling box. The surface of the reciprocating resistance roller is provided with a rubber resistance surface. The label blowing system points to the lower side of the peeling roller. The frame is provided with a misalignment device. The misalignment device drives the upper reciprocating resistance roller and the lower peeling roller to slide axially on the peeling box.

[0008] Preferably, the feeding system includes a feeding motor, a feeding active roller, a feeding passive roller, and a feeding belt. The feeding active roller and the feeding passive roller are rotatably mounted on the frame. The feeding belt passes around the feeding active roller and the feeding passive roller. The feeding motor is mounted on the frame and is connected to the feeding active roller in a driving connection.

[0009] Preferably, the pre-distribution system includes a distributing slide box, which contains a plurality of parallel combing plates.

[0010] Preferably, the label blowing system includes a label blowing nozzle and a label blowing fan. The label blowing nozzle is installed on the side wall of the peeling box and points to the underside of the peeling roller. The label blowing fan is connected to the label blowing nozzle.

[0011] Preferably, the surface of the reciprocating resistance roller is equipped with a plurality of rubber sheets, each rubber sheet forming a rubber resistance surface, and the reciprocating resistance roller is driven by a drive motor mounted on the frame.

[0012] Preferably, the peeling roller is provided with a plurality of peeling teeth.

[0013] Preferably, the stripping power device includes a stripping motor, a stripping transmission timing belt, and a stripping power gear set. The stripping transmission timing belt is driven by the stripping motor. The stripping power gear set is mounted on the frame and driven by the stripping transmission timing belt. The stripping roller is mounted on the output end of the stripping power gear set, and the stripping roller is connected to the output end of the stripping power gear set via a spline.

[0014] Preferably, the misalignment device includes a misalignment cylinder and a misalignment traction plate, the misalignment traction plate is installed on the output end of the misalignment cylinder, and the corresponding reciprocating resistance roller and the peeling roller are rotatably installed on the misalignment traction plate.

[0015] The PET bottle recycling process using waste PET bottle label peeling equipment includes the following steps:

[0016] S1: Flatten the waste PET bottles and place them on the feeding system;

[0017] S2: Waste PET bottles are erected at the pre-dispensing system position. The waste PET bottles fall between the reciprocating resistance roller and the corresponding peeling roller. Under the resistance of the reciprocating resistance roller, the peeling roller sweeps across the surface of the waste PET bottle and peels off the adhesive position of the label.

[0018] S3: Waste PET bottles fall, and the torn labels are blown away by the label blowing system.

[0019] The beneficial effects of this invention are:

[0020] The feeding system feeds towards the pre-sorting system. The crushing system includes a peeling box, a peeling power unit, a reciprocating power unit, and a peeling device. Since the adhesive position of the label may be located on either side of the flattened waste PET bottle, the peeling device has two layers to achieve multiple peelings. The upper peeling device includes a peeling roller and two reciprocating resistance rollers. In the previous process, the flattened waste PET bottle passes sequentially between the reciprocating resistance roller and the peeling roller of the upper peeling device. The two reciprocating resistance rollers in the upper peeling device are located on both sides of the peeling roller. The side of the two reciprocating resistance rollers closer to the peeling roller has a downward linear velocity. Due to the different rotational speeds of the reciprocating resistance roller and the peeling roller, the waste PET bottle moves downward under the resistance of the reciprocating resistance roller. The rotational speed of the peeling roller is higher than that of the reciprocating resistance roller, so that each peeling roller peels off the adhesive position of the label separately, ensuring that the label is peeled off.

[0021] The lower peeling device includes a reciprocating guide roller and two peeling rollers. To facilitate the falling of waste PET bottles, the reciprocating guide roller of the lower peeling device is a smooth roller. To further ensure the peeling of the label at the adhesive position, the two peeling rollers are located on both sides of the reciprocating guide roller. This ensures that when the flattened waste PET bottle falls, both sides of the flattened waste PET bottle can be peeled off by the peeling rollers. Since the label adhesive position must be on one side of the flattened waste PET bottle, this ensures that the label is peeled off by the peeling rollers regardless of which side of the waste PET bottle it is on.

[0022] Both the reciprocating resistance roller and the peeling roller are rotatably mounted on the peeling box. The peeling power unit is connected to each peeling roller via a commercially available synchronous belt and gear pair. The reciprocating power unit is mounted on the peeling box and is connected to the peeling roller and the reciprocating guide roller. The reciprocating power unit drives the upper peeling roller and the lower reciprocating guide roller to slide axially on the peeling box. The surface of the reciprocating resistance roller is provided with a rubber resistance surface. The label blowing system points to the lower side of the peeling roller. The frame is provided with a misalignment device. The misalignment device drives the upper reciprocating resistance roller and the lower peeling roller to slide axially on the peeling box, further ensuring that the peeling roller can pass through all parts of the flattened waste PET bottle and improve the peeling rate. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the crushing system structure.

[0025] Figure 3 This is a schematic diagram of the crushing system from another angle.

[0026] Figure 4 This is a schematic diagram of the label blowing system.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Feeding system; 11. Feeding motor; 12. Feeding drive roller; 13. Feeding belt;

[0029] 2. Pre-dispensing system;

[0030] 3. Crushing system; 31. Stripping box; 32. Stripping power unit; 321. Stripping motor; 322. Stripping transmission synchronous belt; 323. Stripping power gear set; 33. Misalignment device; 331. Misalignment cylinder; 332. Misalignment traction plate; 34. Stripping device; 341. Reciprocating resistance roller; 342. Stripping roller; 343. Reciprocating guide roller; 35. Reciprocating power unit;

[0031] 4. Rack;

[0032] 5. Label blowing system; 51. Label blowing nozzle. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings:

[0034] like Figure 1 — Figure 4 As shown, this embodiment provides a label peeling device for waste PET bottles, including a feeding system 1, a pre-splitting system 2, a crushing system 3, a frame 4, and a label blowing system 5. The feeding direction of the feeding system 1 is towards the pre-splitting system 2. The crushing system 3 includes a peeling box 31, a peeling power device 32, a reciprocating power device 35, and a peeling device 34. Since the adhesive position of the label may be located on either side of the flattened waste PET bottle, the peeling device 34 has two layers to achieve multiple peelings. The upper peeling device 34 includes a peeling roller 342 and two reciprocating resistance rollers 341. The waste PET bottle that has been flattened in the previous process... ET bottles pass sequentially between the reciprocating resistance rollers 341 and the peeling rollers 342 of the upper peeling device 34. The two reciprocating resistance rollers 341 in the upper peeling device 34 are located on both sides of the peeling rollers 342. The linear velocity of the two reciprocating resistance rollers 341 closer to the peeling rollers 342 is downward. Due to the different rotational speeds of the reciprocating resistance rollers 341 and the peeling rollers 342, the waste PET bottles move downward under the resistance of the reciprocating resistance rollers 341. The rotational speed of the peeling rollers 342 is higher than that of the reciprocating resistance rollers 341, so that each peeling roller 342 peels off the adhesive position of the label, ensuring that the label is peeled off.

[0035] like Figure 4 As shown, the lower peeling device 34 includes a reciprocating guide roller 343 and two peeling rollers 342. To facilitate the falling of waste PET bottles, the reciprocating guide roller 343 of the lower peeling device 34 is a smooth roller. To further ensure the peeling of the label at the bonding position, the two peeling rollers 342 are located on both sides of the reciprocating guide roller 343. This ensures that when the flattened waste PET bottle falls, both sides of the flattened waste PET bottle can be peeled by the peeling rollers 342. Since the label bonding position must be on one side of the flattened waste PET bottle, this ensures that the label is peeled off by the peeling rollers 342 regardless of which side of the waste PET bottle it is on.

[0036] Both the reciprocating resistance roller 341 and the peeling roller 342 are rotatably mounted on the peeling box 31. The peeling power unit 32 is connected to each peeling roller 342 via a commercially available synchronous belt and gear pair. The reciprocating power unit 35 is mounted on the peeling box 31 and is connected to the peeling roller 342 and the reciprocating guide roller 343. The reciprocating power unit 35 drives the upper peeling roller 342 and the lower reciprocating guide roller 343 to slide axially on the peeling box 31. The surface of the reciprocating resistance roller 341 is provided with a rubber resistance surface. The label blowing system 5 points to the lower side of the peeling roller 342. The frame 4 is provided with a misalignment device 33. The misalignment device 33 drives the upper reciprocating resistance roller 341 and the lower peeling roller 342 to slide axially on the peeling box 31, further ensuring that the peeling roller 342 can pass through all parts of the flattened waste PET bottle and improve the peeling rate.

[0037] Specifically, the feeding system 1 includes a feeding motor 11, a feeding active roller 12, a feeding passive roller, and a feeding belt 13. The feeding active roller 12 and the feeding passive roller are rotatably mounted on the frame 4. The feeding belt 13 passes around the feeding active roller 12 and the feeding passive roller. The feeding motor 11 is mounted on the frame 4 and is connected to the feeding active roller 12 for transmission, thereby realizing the feeding of waste PET bottles.

[0038] Specifically, the pre-distribution system 2 includes a distributing slide box, which contains several parallel combing plates to help the waste PET bottles stand up, thus making it easier for them to approach the stripping roller 342.

[0039] Specifically, the label blowing system 5 includes a label blowing nozzle 51 and a label blowing fan. The label blowing nozzle 51 is installed on the side wall of the peeling box 31 and points to the lower side of the peeling roller 342. The label blowing fan is connected to the label blowing nozzle 51 and outputs the airflow in a concentrated manner to carry out the label.

[0040] Specifically, the surface of the reciprocating resistance roller 341 is equipped with several rubber sheets, each forming a rubber resistance surface to generate resistance. The reciprocating resistance roller 341 is driven by a drive motor mounted on the frame 4.

[0041] Specifically, the stripping roller 342 is provided with several stripping teeth to achieve stripping.

[0042] Specifically, the stripping power unit 32 includes a stripping motor 321, a stripping transmission timing belt 322, and a stripping power gear set 323. The stripping transmission timing belt 322 is connected to the stripping motor 321. The stripping power gear set 323 is mounted on the frame 4. The stripping transmission timing belt 322 is connected to the stripping power gear set 323. The stripping roller 342 is mounted on the output end of the stripping power gear set 323 to realize the rotation of the stripping roller 342. In order to realize the axial movement of the stripping roller 342, the stripping roller 342 and the output end of the stripping power gear set 323 are connected by a spline.

[0043] Specifically, the misalignment device 33 includes a misalignment cylinder 331 and a misalignment traction plate 332. The misalignment traction plate 332 is installed on the output end of the misalignment cylinder 331, and the corresponding reciprocating resistance roller 341 and peeling roller 342 are rotatably installed on the misalignment traction plate 332 to realize the axial movement of the peeling roller 342 and promote the falling of waste PET bottles.

[0044] The PET bottle recycling process using waste PET bottle label peeling equipment includes the following steps:

[0045] S1: Flatten the waste PET bottles and place them on the feeding system 1;

[0046] S2: Waste PET bottles are erected at position 2 of the pre-distribution system. The waste PET bottles fall between the reciprocating resistance roller 341 and the corresponding peeling roller 342. Under the resistance of the reciprocating resistance roller 341, the peeling roller 342 sweeps across the surface of the waste PET bottles and peels off the adhesive position of the label.

[0047] S3: The waste PET bottle falls, and the torn label is blown away by the label blowing system 5.

[0048] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A label peeling device for waste PET bottles, characterized in that, The system includes a feeding system, a pre-distribution system, a crushing system, a frame, and a label blowing system. The feeding system directs the material towards the pre-distribution system. The crushing system includes a stripping box, a stripping power unit, a reciprocating power unit, and a stripping device. The stripping device has two layers. The upper layer includes a stripping roller and two reciprocating resistance rollers. The two reciprocating resistance rollers are located on either side of the stripping roller, with the linear velocity of the side of the two reciprocating resistance rollers closest to the stripping roller downwards. The rotational speeds of the reciprocating resistance rollers and the stripping roller are different, with the stripping roller rotating at a higher speed than the reciprocating resistance rollers. The lower layer includes a reciprocating guide roller and two stripping rollers. The reciprocating guide roller of the device is a smooth roller, and two peeling rollers are located on both sides of the reciprocating guide roller. The reciprocating resistance roller and the peeling roller are rotatably mounted on the peeling box. The peeling power device is driven by each peeling roller. The reciprocating power device is mounted on the peeling box and is driven by the peeling roller and the reciprocating guide roller. The reciprocating power device drives the upper peeling roller and the lower reciprocating guide roller to slide axially on the peeling box. The surface of the reciprocating resistance roller is provided with a rubber resistance surface. The label blowing system points to the lower side of the peeling roller. The frame is provided with a misalignment device, which drives the upper reciprocating resistance roller and the lower peeling roller to slide axially on the peeling box.

2. The waste PET bottle label peeling device according to claim 1, characterized in that, The feeding system includes a feeding motor, a feeding active roller, a feeding passive roller, and a feeding belt. The feeding active roller and the feeding passive roller are rotatably mounted on the frame. The feeding belt passes around the feeding active roller and the feeding passive roller. The feeding motor is mounted on the frame and is connected to the feeding active roller in a driving connection.

3. The waste PET bottle label peeling device according to claim 1, characterized in that, The pre-distribution system includes a distributing slide box, which contains several parallel combing plates.

4. The waste PET bottle label peeling device according to claim 1, characterized in that, The label blowing system includes a label blowing nozzle and a label blowing fan. The label blowing nozzle is installed on the side wall of the peeling box and points to the underside of the peeling roller. The label blowing fan is connected to the label blowing nozzle.

5. The waste PET bottle label peeling device according to claim 1, characterized in that, The reciprocating resistance roller has several rubber sheets mounted on its surface, and each rubber sheet forms a rubber resistance surface. The reciprocating resistance roller is driven by a drive motor mounted on the frame.

6. The waste PET bottle label peeling device according to claim 1, characterized in that, The peeling roller is provided with several peeling teeth.

7. The waste PET bottle label peeling device according to claim 1, characterized in that, The stripping power unit includes a stripping motor, a stripping transmission synchronous belt, and a stripping power gear set. The stripping transmission synchronous belt is connected to the stripping motor. The stripping power gear set is mounted on the frame and is connected to the stripping power gear set. The stripping roller is mounted on the output end of the stripping power gear set, and the stripping roller is connected to the output end of the stripping power gear set via a spline.

8. The waste PET bottle label peeling device according to claim 1, characterized in that, The misalignment device includes a misalignment cylinder and a misalignment traction plate. The misalignment traction plate is installed on the output end of the misalignment cylinder, and the corresponding reciprocating resistance roller and the peeling roller are rotatably installed on the misalignment traction plate.

9. A PET bottle recycling process using a waste PET bottle label peeling device, comprising the waste PET bottle label peeling device as described in claim 1, characterized in that... Includes the following steps: S1: Flatten the waste PET bottles and place them on the feeding system; S2: Waste PET bottles are erected at the pre-dispensing system position. The waste PET bottles fall between the reciprocating resistance roller and the corresponding peeling roller. Under the resistance of the reciprocating resistance roller, the peeling roller sweeps across the surface of the waste PET bottle and peels off the adhesive position of the label. S3: Waste PET bottles fall, and the torn labels are blown away by the label blowing system.

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