Bottle cap and bottle body separation device and separation method based on plastic bottle recycling

Abstract

This invention provides a bottle cap and bottle body separation device and method based on plastic bottle recycling, relating to the field of plastic product recycling technology. It includes: a separator support; a drive mechanism installed on the left side of the separator support; six fixed-axis gears rotatably connected in a ring on the inner surface of the two side plates of the separator support; a separation cylinder movably connected inside the separator support; and cylinder toothed rings on the two edges of the outer surface of the separation cylinder, which mesh with the fixed-axis gears. Through the bottle mouth insertion port and neck locking port circumferentially opened on the separation cylinder, along with the neck locking bar that rotates with the cylinder and the pushing protrusion on the top ring of the locking bar, the bottle body can be automatically hooked and locked during rotation, eliminating the need for manual feeding of each bottle. The bottle cap is detached by the tangential friction between the bottle cap separation arc strip and the anti-slip wedge teeth, replacing the whole-bottle squeezing method. This avoids the mixing of fragments caused by bottle breakage, ensuring greater purity of the separated bottle body and bottle cap.

Description

Technical Field

[0001] This invention relates to the field of plastic product recycling technology, and in particular to a bottle cap and bottle body separation device and separation method based on plastic bottle recycling. Background Technology

[0002] Single-use plastic bottles are typically made of PET for the bottle body, while the caps are usually made of PP or PE. These two plastics have significantly different melting points and densities. If the caps and bottle bodies are crushed and granulated together, the PP or PE will form infusible impurity phases in the PET melt, reducing the purity and strength of the recycled PET. Therefore, to obtain high-quality recycled materials, the bottle body and cap must be separated during the recycling process. In addition, the recycling price of clean and transparent PET bottle flakes is much higher than that of mixed colored plastics, so separate processing is necessary to achieve higher resource recovery benefits.

[0003] For example, patent application number CN201610463516.9 discloses an automatic bottle cap separating machine for plastic bottles, including a frame, a chassis, a DC drive motor, and active and passive incomplete gears; it adopts a production method that combines manual feeding with automatic mechanical processing, enabling the mechanical device to complete a series of actions such as positioning and clamping plastic bottles, cutting, separating bottle caps and labels, and automatic recycling.

[0004] Similar to the spin-off bottle cap separation solution given in the aforementioned patent, manual or robotic feeding is required, which is time-consuming, labor-intensive, and costly, making it difficult to apply to bulk recycling. Traditional recycling stations are equipped with high-power crushing and separation equipment that indiscriminately squeezes the entire bottle to detach the cap. This type of equipment is large and powerful, and its purchase and operating costs are not friendly to small recycling stations. Furthermore, the bottle and cap are prone to breakage during the crushing process, and the fragments mixed together will reduce the purity of the separated waste. Summary of the Invention

[0005] This invention provides a bottle cap and bottle body separation device and method based on plastic bottle recycling, which solves the problem that the twist-off bottle cap separation scheme requires manual or robotic feeding one by one, which is time-consuming, labor-intensive and costly, and difficult to use for batch recycling. The high-power crushing and separation equipment equipped in traditional recycling stations relies on indiscriminately squeezing the whole bottle to separate the cap. Such equipment is large and powerful, and the purchase and operation costs are not friendly to small recycling stations. In addition, the bottle body and bottle cap are prone to breakage during the squeezing process, and the fragments mixed together will reduce the purity of the separated waste.

[0006] This invention provides a bottle cap and bottle body separation device and method based on plastic bottle recycling, specifically including: a separator bracket, a drive mechanism mounted on the left side of the separator bracket, six fixed-axis gears rotatably connected in a ring on the inner surface of the two side plates of the separator bracket, a separation cylinder movably connected inside the separator bracket, cylinder toothed rings provided on the two edges of the outer surface of the separation cylinder, the cylinder toothed rings meshing with the fixed-axis gears, the drive mechanism connecting to and driving the fixed-axis gear located at the front and lower, the cylinder wall of the separation cylinder having evenly distributed through-hole "V"-shaped bottle neck insertion ports, the conical end of the bottle neck insertion port having a semi-circular bottle neck locking port, and a fixed connection between the two side plates of the separator bracket. A fixed support shaft is fixedly connected to a bottle cap separation channel, which is inclined from left to right. The right end of the bottle cap separation channel extends through to the right side of the separator bracket. Above the bottle cap separation channel, a bottle cap separation arc strip coaxial with the separation cylinder is fixedly connected. The left surface of the bottle cap separation arc strip is provided with anti-slip wedge teeth. The left surface of the bottle cap separation arc strip is tangent to the right side of the bottle cap inserted into the neck of the plastic bottle. The toothed conical end of the anti-slip wedge teeth faces the side front. A bottle body filling hopper is fixedly connected to the front of the separator bracket, and a bottle body separation channel is fixedly connected to the rear of the separator bracket. Both the bottle body filling hopper and the bottle body separation channel are installed with an incline that is higher at the front and lower at the rear.

[0007] Furthermore, the outer edge of the fixed-axis gear is provided with a flange that fits against the edge of the separating cylinder, and the right wall of the separator bracket is provided with a bottle cap channel through which a bottle cap separation channel is inserted.

[0008] Furthermore, a synchronous coupling is fixedly connected between the two fixed-axis gears on the lower front of the two side plates of the separator bracket.

[0009] Furthermore, a locking bar top ring is fixedly connected to the inner left surface of the separator bracket, and the upper half of the locking bar top ring is bent to the right and protrudes with a pushing protrusion.

[0010] Furthermore, a bottleneck locking bar is slidably installed on the inner surface of the separating cylinder. The bottleneck locking bar is parallel to the axis of the separating cylinder. A bottleneck inlet is opened on the edge of the bottleneck locking bar. An inlet cutting edge is inclinedly provided on the left edge of the bottleneck inlet. A bottleneck locking tooth groove with an arc-shaped structure is opened inside the bottleneck inlet. A serrated structure is provided on the edge of the bottleneck locking tooth groove. The bottleneck locking tooth groove is aligned with the bottleneck locking inlet.

[0011] Furthermore, a lock bar guide rod is fixedly connected to the left end of the bottleneck lock bar. The lock bar guide rod is slidably connected to a reset guide plate welded to the inner wall of the separation cylinder. A lock bar reset tension spring is sleeved on the lock bar guide rod. The two ends of the lock bar reset tension spring are fixedly connected to the bottleneck lock bar and the reset guide plate, respectively. A locking push wheel is rotatably connected to the left end of the lock bar guide rod. The locking push wheel is rotatably connected to the top ring of the lock bar.

[0012] Furthermore, the front end of the bottle cap separating arc strip is bent to the right and has an arc strip inlet flange, and the outer edge of the bottle cap separating arc strip has a gap of 5mm-10mm with the inner wall of the separating cylinder.

[0013] Furthermore, a top plate through-hole is provided through the rear edge of the bottle filling hopper, the top plate through-hole is perpendicular to the separation vortex cylinder, a top plate coupling is rotatably connected below the bottle filling hopper, a fan-shaped stirring top plate is fixedly connected to the outside of the top plate coupling, the stirring top plate is slidably connected inside the top plate through-hole, and the upper edge of the stirring top plate is flush with the top plate through-hole, and a top plate limiting plate is fixedly connected to the lower edge of the stirring top plate.

[0014] Furthermore, a top-moving push cylinder is fixedly connected below the bottle filling hopper, and a synchronous push shaft is fixedly connected to the push rod of the top-moving push cylinder. The synchronous push shaft is rotatably connected to a synchronous push wheel corresponding to the number of agitation top plates, and the synchronous push wheel is rolledly connected to the lower edge of the agitation top plate.

[0015] This invention provides a bottle cap and bottle body separation device and method based on plastic bottle recycling, which has the following beneficial effects: This invention utilizes a bottle neck insertion port and a bottle neck locking port circumferentially separated by a rotating drum. Combined with a bottle neck locking bar that rotates with the drum and a pushing protrusion on the top ring of the locking bar, the bottle can be automatically hooked and locked during rotation, eliminating the need for manual or robotic feeding of individual bottles and meeting the processing rhythm of batch recycling. The bottle cap is detached by the tangential friction between the cap separation arc and the anti-slip wedge teeth, replacing the whole-bottle compression method. This avoids fragmentation and mixing of bottle body and cap due to breakage, ensuring greater purity of the separated bottle body and cap. A stirring top plate, intermittently driven by a top-driven cylinder, continuously agitates the bottle body during feeding, significantly increasing the probability of the bottle neck facing the separating drum and inserting into the insertion port, ensuring reliable bottle hooking. This eliminates the need for manual or robotic feeding of individual bottles, allowing for batch processing, and prevents fragmentation that could affect the purity of the recycled material.

[0016] This device employs a single drive mechanism that uses a fixed-axis gear and a rotating cylinder ring to rotate the separating cylinder. The short transmission chain and compact overall structure result in relatively low purchase and operating costs, making it particularly suitable for use in small-scale waste recycling sites. The inclined arrangement of the cap and body separation channels allows the detached caps and bodies to slide off and be collected independently by gravity, eliminating the need for additional conveying components and further simplifying the equipment. The neck locking bar is reset by a locking bar return spring, and the locking push wheel and push-top protrusion work reliably. Locking and releasing are automatically completed with the rotation angle of the rotating cylinder, simplifying control. It integrates bottle hanging, locking, detaching, unlocking, and separate collection into the same rotation process, ensuring continuous operation, high processing efficiency, and complete separation of caps and bodies for downstream sorting and utilization. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0018] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0019] In the attached diagram: Figure 1 A schematic diagram of the overall structure of this application is shown; Figure 2 A top view of the structure of this application is shown; Figure 3 This is a schematic diagram of the structure from the bottom view of this application; Figure 4 A schematic diagram of the left-side structure of this application is shown; Figure 5 This invention illustrates a schematic diagram of the separator support and the separation cylinder during separation. Figure 6 A schematic diagram of the bottle cap channel opening structure of this application is shown; Figure 7 This diagram illustrates the structure of the bottleneck when it is inserted into the bottleneck lock. Figure 8 This invention illustrates the structure of the bottle cap when it contacts the cap separation arc strip. Figure 9 A schematic diagram of the bottleneck locking bar of this application is shown; Figure 10 A schematic diagram of the structure of the top ring of the locking bar in this application is shown; Figure 11 A schematic diagram of the cap separation channel of this application is shown; Figure 12 A schematic diagram of the bottle packing hopper of this application is shown; Figure 13 A schematic diagram of the structure of the agitator top plate of this application is shown; Figure 14 This application shows Figure 7 A magnified structural diagram of point A; Figure 15 This application shows Figure 8 A magnified structural diagram of point B; Figure 16 This application shows Figure 13 A magnified structural diagram of point C.

[0020] Figure label: 1. Separator bracket; 101. Fixed-axis gear; 102. Bottle cap channel through-hole; 103. Synchronous coupling; 104. Fixed support shaft; 2. Drive mechanism; 3. Separating cylinder; 301. Bottle mouth inlet; 302. Bottle neck locking port; 303. Cylinder gear ring; 304. Reset guide plate; 4. Locking bar top ring; 401. Pushing protrusion; 5. Bottle neck locking bar; 501. Bottle neck inlet; 502. Inlet cutting edge; 503. Bottle neck locking groove 504. Locking bar guide rod; 505. Locking bar reset spring; 506. Locking push wheel; 6. Bottle cap separation channel; 601. Bottle cap separation arc bar; 602. Arc bar inlet flange; 603. Anti-slip wedge teeth; 7. Bottle body filling hopper; 701. Top plate through-hole; 702. Top plate coupling; 703. Stirring top plate; 704. Top plate limiting plate; 8. Pushing cylinder; 801. Synchronous push shaft; 802. Synchronous push wheel; 9. Bottle body separation channel. Detailed Implementation

[0021] Example 1: Please refer to Figures 1 to 16 : This invention proposes a bottle cap and bottle body separation device and method based on plastic bottle recycling, specifically including: a separator bracket 1, a drive mechanism 2 installed on the left side of the separator bracket 1, six fixed-axis gears 101 rotatably connected in a ring on the inner surface of the two side plates of the separator bracket 1, a separation cylinder 3 movably connected inside the separator bracket 1, cylinder toothed rings 303 provided on the two edges of the outer surface of the separation cylinder 3, the cylinder toothed rings 303 meshing with the fixed-axis gears 101, the drive mechanism 2 connecting to and driving the fixed-axis gears 101 located at the front and lower, the outer edge of the fixed-axis gears 101 having flanges that fit against the edge of the separation cylinder 3, and the separator bracket... A synchronous coupling 103 is fixedly connected between the two fixed-axis gears 101 on the lower front of the two side plates of the frame 1; the six fixed-axis gears 101 on the inner rings on both sides of the separator bracket 1 jointly support the cylinder tooth ring 303 on the outer edge of the separation cylinder 3, so that the cylinder can rotate smoothly around the fixed axis. The drive mechanism 2 only needs to drive one fixed-axis gear 101 at the lower front to drive the entire cylinder to rotate through meshing. The flange of the fixed-axis gear 101 fits against the edge of the cylinder to prevent the separation cylinder 3 from moving. The synchronous coupling 103 added between the fixed-axis gears 101 ensures that the left and right sides apply force synchronously, so that the cylinder rotates evenly and without swaying, providing a stable rotary drive.

[0022] In this embodiment, the separating cylinder 3 has evenly distributed through-hole "V"-shaped bottle neck inlets 301 on its wall, facilitating the smooth introduction of the bottle neck. The conical end of each inlet 301 has a semi-circular neck locking opening 302, which can hold the neck support ring and suspend the bottle as it rotates. A fixed support shaft 104 is fixedly connected between the two side plates of the separator bracket 1. A bottle cap separation channel 6 is fixedly connected to the fixed support shaft 104. The right wall of the separator bracket 1 has a bottle cap channel through-hole 102 for inserting the bottle cap separation channel 6. The bottle cap separation channel 6 is inclined from left to right, and its right end extends through to the right side of the separator bracket 1. A bottle filling hopper 7 is fixedly connected to the front of the bracket 1, and a bottle separation channel 9 is fixedly connected to the rear of the separator bracket 1. Both the bottle filling hopper 7 and the bottle separation channel 9 are installed at an incline with the front higher than the rear. The fixed support shaft 104 stably supports the bottle cap separation channel 6 inside the rotating cylinder, and the right end of the channel extends from the bottle cap channel through-hole 102. The incline with the left higher than the right allows the removed bottle cap to automatically roll out to the right. The bottle filling hopper 7 at the front end and the bottle separation channel 9 at the rear end are both arranged with the front higher than the rear, allowing the bottle to be processed to slide towards the separating rotating cylinder 3 by its own weight. After separation, the bottle body slides out backward by its own weight. No additional conveying device is required, and the structure is compact and reliable.

[0023] In this embodiment, a locking bar top ring 4 is fixedly connected to the left inner surface of the separator bracket 1. The upper half of the locking bar top ring 4 is bent to the right and protrudes with a pushing protrusion 401. A bottleneck locking bar 5 is slidably installed on the inner surface of the separation cylinder 3. The bottleneck locking bar 5 is parallel to the axis of the separation cylinder 3. A bottleneck insertion port 501 is opened on the edge of the bottleneck locking bar 5. An insertion cutting edge 502 is inclinedly provided on the left edge of the bottleneck insertion port 501. A bottleneck locking tooth groove 503 with an arc-shaped structure is opened inside the bottleneck insertion port 501. The edge of the bottleneck locking tooth groove 503 has a sawtooth structure. The bottleneck locking tooth groove 503 is aligned with the bottleneck locking port 302. A locking bar guide rod 504 is fixedly connected to the left end of the bottleneck locking bar 5. The locking bar guide rod 504 is slidably connected to a reset guide plate 304 welded to the inner wall of the separation cylinder 3. A locking bar reset tension spring 505 is sleeved on the locking bar guide rod 504. The bottle neck locking bar 5 and the reset guide plate 304 are fixedly connected at both ends. The left end of the locking bar guide rod 504 is rotatably connected to the locking push wheel 506, which is rolled to the top ring 4 of the locking bar. The rightward protruding push section 401 of the upper half of the top ring 4 of the locking bar controls the locking timing. The bottle neck locking bar 5 can slide along the axis of the rotating cylinder. The insertion cutting edge 502 on it can make the bottle neck locking tooth groove 503 more smoothly align with the gap between the support ring and the bottle body at the bottle neck position. The serrated structure of the inner wall of the bottle neck locking tooth groove 503 can bite the bottle neck, so that the bottle body and the rotating cylinder remain relatively fixed when the cap is screwed on. The locking bar guide rod 504 slides in the reset guide plate 304. The locking bar reset tension spring 505 pulls back the locking bar in normal state. When the locking push wheel 506 rolls up the push section 401 with the rotating cylinder, the locking bar is pushed to the right to lock the bottle body. After rolling away from the protrusion, it automatically releases, ensuring that the bottle body falls smoothly after the cap is removed.

[0024] In this embodiment, a bottle cap separating arc strip 601 coaxial with the separating cylinder 3 is fixedly connected above the bottle cap separating channel 6. The left surface of the bottle cap separating arc strip 601 is provided with anti-slip wedge teeth 603. The left surface of the bottle cap separating arc strip 601 is tangent to the right side of the bottle cap inserted into the bottle neck lock 302. The toothed cone end of the anti-slip wedge teeth 603 faces the side front. The distance between the outer edge of the bottle cap separating arc strip 601 and the inner wall of the separating cylinder 3 is 5mm-10mm. When the bottle body revolves with the cylinder, the bottle cap is pressed against the surface of the arc strip. The toothed cone end of the anti-slip wedge teeth 603 faces the side front, which increases the tangential friction and effectively prevents the bottle cap from slipping. This forces the bottle cap to rotate counterclockwise on the arc strip, thereby gradually rotating away from the bottle mouth. The front end of the bottle cap separating arc strip 601 is bent to the right and has an arc strip inlet flange 602. The arc strip inlet flange 602 bends to the right, which plays a role in smoothly guiding the bottle cap.

[0025] In Example 2, based on Example 1, a top plate through-hole 701 is provided through the rear edge of the bottle filling hopper 7. The top plate through-hole 701 is perpendicular to the separating vortex cylinder 3. A top plate coupling 702 is rotatably connected below the bottle filling hopper 7. A fan-shaped stirring top plate 703 is fixedly connected to the outside of the top plate coupling 702. The stirring top plate 703 is slidably connected inside the top plate through-hole 701, and the upper edge of the stirring top plate 703 is flush with the top plate through-hole 701. The lower edge of the stirring top plate 703... A top plate limiting plate 704 is fixedly connected to the edge of the bottle body filling hopper 7. A push cylinder 8 is fixedly connected below the bottle body filling hopper 7. The push rod of the push cylinder 8 is fixedly connected to a synchronous push shaft 801. The synchronous push shaft 801 is rotatably connected to a synchronous push wheel 802 corresponding to the number of stirring top plates 703. The synchronous push wheel 802 is rolledly connected to the lower edge of the stirring top plate 703. When the push cylinder reciprocates, it pushes the fan-shaped top plate to swing upward intermittently into the hopper around the top plate coupling shaft 702, thereby turning over the accumulated bottles. The top plate limiting plate 704 prevents the top plate from swinging excessively. When not in motion, the upper edge of the stirring top plate 703 is flush with the top plate opening 701, which does not affect the sliding of the bottle body. This stirring causes the bottle body, which was originally facing the vortex or squeezed laterally, to continuously adjust its posture, greatly increasing the probability of the bottle mouth inserting into the bottle mouth insertion port 301.

[0026] Working principle: Recycled plastic bottles are placed in the bottle filling hopper 7. Under the action of the inclined plane, the bottles gather towards the separating rotary drum 3. The push cylinder 8 is controlled to intermittently extend and retract. The push cylinder 8 intermittently pushes the stirring top plate 703 to swing upward around the top plate coupling 702 through the synchronous push shaft 801 and synchronous push wheel 802, turning the bottles in the hopper so that some bottle mouths face the rotary drum and are inserted into the rotating "V"-shaped bottle mouth insertion 301. The bottle neck support ring falls into the bottle neck locking hole 302 to achieve suspension. The drive mechanism 2 is started. The drive mechanism 2 drives the front and lower fixed shaft gear 101. The synchronous coupling 103 ensures synchronization on both sides. Then, through the rotary drum gear ring 303, the separating rotary drum 3 is driven to rotate smoothly under the support of the other fixed shaft gears 101. The suspended bottle body rises with the rotary drum. When the locking push wheel 506 at the left end of the row of bottle neck locking bars 5 rolls to When the top ring 4 of the locking bar pushes the protrusion 401, the locking bar is pushed to the right, and the serrated structure of the bottle neck locking groove 503 bites the bottle neck and locks the bottle body. The bottle cap of the locked bottle body continues to revolve with the rotating cylinder and contacts the left surface of the bottle cap separation arc 601. The arc end fold 602 guides the bottle cap to enter smoothly, and the anti-slip wedge 603 increases the tangential friction, forcing the bottle cap to rotate counterclockwise and spin away from the bottle mouth. The detached bottle cap falls into the bottle cap separation channel 6, which is higher on the left and lower on the right, and rolls out to the right by itself. After the bottle cap falls off, the locking push wheel 506 moves away from the top protrusion 401, and the bottle neck locking bar 5 moves to the left and resets under the action of the locking bar reset spring 505. The bottle neck locking groove 503 is released from locking, and when the bottle body rotates to the rear with the rotating cylinder, it falls into the bottle body separation channel 9, which is higher in the front and lower in the back, and slides out backward. At this time, the automatic separation and separate collection of the bottle cap and bottle body is completed.

Claims

1. A bottle cap and bottle body separation device based on plastic bottle recycling, comprising: A separator bracket (1) is provided with a drive mechanism (2) installed on the left side of the separator bracket (1). Six fixed-axis gears (101) are rotatably connected to the inner surfaces of the two side plates of the separator bracket (1). A separator cylinder (3) is movably connected inside the separator bracket (1). A cylinder gear ring (303) is provided on the two edges of the outer surface of the separator cylinder (3). The cylinder gear ring (303) meshes with the fixed-axis gear (101). The drive mechanism (2) is connected to and drives the fixed-axis gear (101) located at the front and lower. The cylinder wall of the separator cylinder (3) is evenly distributed with "V"-shaped bottle mouth inlets (301) that pass through. The conical end of the bottle mouth inlet (301) is provided with a semi-circular bottleneck lock (302). A fixed support shaft (104) is fixedly connected between the two side plates of the separator bracket (1). A bottle cap separation channel (6) is fixedly connected. The bottle cap separation channel (6) is inclined with the left side higher than the right side. The right end of the bottle cap separation channel (6) extends through to the right side of the separator bracket (1). A bottle cap separation arc strip (601) coaxial with the separation cylinder (3) is fixedly connected above the bottle cap separation channel (6). The left surface of the bottle cap separation arc strip (601) is provided with anti-slip wedge teeth (603). The left surface of the bottle cap separation arc strip (601) is tangent to the right side of the bottle cap of the plastic bottle inserted into the neck lock (302). The toothed cone end of the anti-slip wedge teeth (603) faces the side front. A bottle body filling hopper (7) is fixedly connected to the front of the separator bracket (1). A bottle body separation channel (9) is fixedly connected to the rear of the separator bracket (1). Both the bottle body filling hopper (7) and the bottle body separation channel (9) are installed with the front side higher than the rear side.

2. The bottle cap and bottle body separation device based on plastic bottle recycling according to claim 1, characterized in that, The outer edge of the fixed-axis gear (101) is provided with a flange that fits against the edge of the separating cylinder (3), and the right wall of the separator bracket (1) is provided with a bottle cap channel through-hole (102) for inserting the bottle cap separation channel (6).

3. The bottle cap and bottle body separation device based on plastic bottle recycling according to claim 1, characterized in that, A synchronous coupling (103) is fixedly connected between the two fixed-axis gears (101) on the lower front side plates of the separator bracket (1).

4. The bottle cap and bottle body separation device based on plastic bottle recycling according to claim 1, characterized in that, The separator bracket (1) has a locking bar top ring (4) fixedly connected to the left inner surface. The upper half of the locking bar top ring (4) is bent to the right and protrudes with a push-top protrusion (401).

5. The bottle cap and bottle body separation device based on plastic bottle recycling according to claim 4, characterized in that, A bottleneck locking bar (5) is slidably installed on the inner surface of the separating cylinder (3). The bottleneck locking bar (5) is parallel to the axis of the separating cylinder (3). A bottleneck inlet (501) is provided on the edge of the bottleneck locking bar (5). An inlet cutting edge (502) is provided on the left edge of the bottleneck inlet (501). A bottleneck locking tooth groove (503) with an arc shape is provided inside the bottleneck inlet (501). A sawtooth structure is provided on the edge of the bottleneck locking tooth groove (503). The bottleneck locking tooth groove (503) is aligned with the bottleneck locking inlet (302).

6. The bottle cap and bottle body separation device based on plastic bottle recycling according to claim 5, characterized in that, The left end of the bottleneck lock bar (5) is fixedly connected to a lock bar guide rod (504). The lock bar guide rod (504) is slidably connected to a reset guide plate (304) welded to the inner wall of the separation cylinder (3). The lock bar guide rod (504) is sleeved with a lock bar reset spring (505). The two ends of the lock bar reset spring (505) are fixedly connected to the bottleneck lock bar (5) and the reset guide plate (304) respectively. The left end of the lock bar guide rod (504) is rotatably connected to a locking push wheel (506). The locking push wheel (506) is slidably connected to the top ring (4) of the lock bar.

7. The bottle cap and bottle body separation device based on plastic bottle recycling according to claim 1, characterized in that, The front end of the bottle cap separating arc strip (601) is bent to the right and has an arc strip inlet flange (602). The outer edge of the bottle cap separating arc strip (601) and the inner wall of the separating cylinder (3) are provided with a gap.

8. The bottle cap and bottle body separation device based on plastic bottle recycling according to claim 1, characterized in that, The bottle filling hopper (7) has a top plate through-hole (701) through its rear edge. The top plate through-hole (701) is perpendicular to the separating vortex cylinder (3). The bottle filling hopper (7) is rotatably connected to the bottom of the top plate coupling (702). A fan-shaped stirring top plate (703) is fixedly connected to the outside of the top plate coupling (702). The stirring top plate (703) is slidably connected inside the top plate through-hole (701), and the upper edge of the stirring top plate (703) is flush with the top plate through-hole (701). The lower edge of the stirring top plate (703) is fixedly connected to the top plate limiting plate (704).

9. The bottle cap and bottle body separation device based on plastic bottle recycling according to claim 8, characterized in that, A top-moving push cylinder (8) is fixedly connected below the bottle filling hopper (7). The push rod of the top-moving push cylinder (8) is fixedly connected to a synchronous push shaft (801). The synchronous push shaft (801) is rotatably connected to a synchronous push wheel (802) corresponding to the number of agitating top plates (703). The synchronous push wheel (802) is rolled and connected to the lower edge of the agitating top plate (703).

10. The method for separating plastic bottles using a bottle cap and bottle body separation device based on plastic bottle recycling according to any one of claims 1-9, characterized in that, Includes the following steps:

01. Place the recycled plastic bottle in the bottle filling hopper (7). Under the action of the inclined plane, the bottle gathers towards the separation vortex (3). The push cylinder (8) pushes the stirring top plate (703) intermittently through the synchronous push shaft (801) and synchronous push wheel (802) to swing upward around the top plate coupling (702). The bottle in the hopper is turned over so that part of the bottle mouth faces the vortex and is inserted into the rotating "V" shaped bottle mouth insertion (301). The neck support ring falls into the neck lock (302) to achieve suspension.

02. The drive mechanism (2) drives the front and lower fixed shaft gear (101), and ensures synchronization on both sides through the synchronous coupling (103). Then, through the rotating cylinder gear ring (303), the separation rotating cylinder (3) is driven to rotate smoothly under the support of the other fixed shaft gears (101), and the suspended bottle rises with the rotating cylinder.

03. When the locking push wheel (506) at the left end of the bottleneck lock bar (5) rolls to the push protrusion (401) of the top ring (4) of the lock bar, the lock bar is pushed to the right, and the sawtooth structure of the bottleneck locking groove (503) bites the bottleneck and locks the bottle body.

04. The bottle cap, which is locked, continues to revolve with the rotating cylinder and comes into contact with the left surface of the bottle cap separation arc (601). The folded edge (602) at the inlet of the arc guides the bottle cap to enter smoothly. The anti-slip wedge (603) increases the tangential friction, forcing the bottle cap to rotate counterclockwise away from the bottle mouth. The detached bottle cap falls into the bottle cap separation channel (6) which is higher on the left and lower on the right and rolls out to the right on its own.

05. After the bottle cap falls off, the locking push wheel (506) moves away from the push-top protrusion (401), and the bottle neck locking bar (5) moves to the left and resets under the action of the locking bar reset spring (505). The bottle neck locking groove (503) is released from locking. When the bottle body rotates to the rear with the rotating cylinder, it falls into the bottle body separation channel (9) which is higher in the front and lower in the back by its own weight and slides out backward. Thus, the automatic separation and separate collection of the bottle cap and bottle body is completed.

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