A PET bottle body label removal device

Abstract

The present invention relates to the technical field of plastic recycling, and discloses a device for removing labels from PET bottle bodies, including a machine body. On both sides of the outer wall of the machine body, there are pretreatment mechanisms for preprocessing the labels on the bottle bodies. Outside the pretreatment mechanisms, there is a softening mechanism for softening the labels on the bottle bodies. On one side of the outer wall of the machine body, there is a discharging mechanism for conveying the preprocessed bottle bodies out. By using the extrusion of the extrusion plate and the exhaust spikes, the bottle can be flattened before entering the label removing machine. The flattened bottle can have a larger contact area with the blades of the label removing machine compared to the irregularly shaped bottles after recycling. At the same time, in order to prevent residues from remaining at the places with adhesives at the label sticking positions when the labels are scraped off by the blades, while the bottle is being flattened, the brush will rotate and the nozzle will spray a liquid for softening the labels, so that the blades of the label removing machine can better scrape off the labels.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic recycling, and specifically to a device for removing labels from PET bottle bodies. Background Art

[0002] In the patent application with the publication number CN113910496A, it includes a scraper. The left end of the scraper is movably connected to a clamping plate. The left end of the clamping plate is movably connected to a temperature-conducting rod. The left end of the temperature-conducting rod is movably connected to a heat-conducting wire. The left end of the heat-conducting wire is movably connected to a transmission air chamber. The left end of the transmission air chamber is movably connected to a constant-pressure piston. The left end of the constant-pressure piston is movably connected to a transmission rod.

[0003] Advantages: As the temperature of the plastic bottle continuously rises, the pressure in the transmission air chamber increases, thereby driving the movement of the transmission rod. The movement of the transmission rod pulls the rotating pull rope. After the rotating pull rope is pulled, it drives the rotation of the rotating rod. The rotation of the rotating rod drives the rotation of the rotating platform. The rotation of the rotating platform drives the rotation of the plastic bottle. During the rotation process, the scraper peels off the label, thus achieving the effect of automatically peeling off the label on the surface of the plastic bottle.

[0004] Currently, when removing the labels from PET bottle bodies, first, the bottle bodies with labels need to be immersed in a material pool with a solution to soften the labels on the bottle bodies. After softening the labels, the bottle bodies are directly placed on the conveyor belt of the label remover for separation. However, among the recycled bottle bodies, some are flat and have no air inside, while some have air inside. When the bottles with air enter the label remover, the elasticity generated after colliding with the blades of the label remover will increase. This results in that most of the bottles still have some labels remaining after the label removal is completed, and a small part of the labels are not even detached. Some manufacturers will ask workers to manually step on the recycled bottles to flatten them, which is beneficial for complete label removal. However, the screening efficiency is too low in this way. Moreover, due to the limitation of the bottle caps, for the bottles with air, if they are batch-extruded using extrusion equipment, very small-scale air explosions will occur, and it will also cause a burden on the extrusion equipment during long-term use. Even if they enter the label remover with high-speed rotation, it only breaks the bottle bodies and cannot solve the problem of remaining labels. In addition, the discharged bottles are prone to accumulation due to different sizes, resulting in the need to quickly clear a new space at the discharge location. Summary of the Invention

[0005] The problems to be solved by the present invention are: the problem that labels still remain after the label removal of the bottle body is completed and the low efficiency caused by soaking the solution to soften the labels before the bottle body enters the label remover.

[0006] To solve the above technical problems, the technical solution of the present invention is as follows: It includes a machine body. On both sides of the outer wall of the machine body, there are pretreatment mechanisms for preprocessing the bottle body labels. Outside the pretreatment mechanisms, there is a softening mechanism for softening the bottle body labels. On one side of the outer wall of the machine body, there is a discharging mechanism for conveying the preprocessed bottle body out. The machine body includes a frame. Inside the frame, there is a conveyor belt. At the bottom of the inner wall of the frame, there is a water channel. On the outer wall of the frame, there is a first baffle. The pretreatment mechanism includes hydraulic cylinders installed on both sides of the outer wall of the machine body. The output end of the hydraulic cylinder is connected to a pressing plate. On the outer walls of the pressing plate, there are exhaust thorns. Cavities are opened on the outer walls of the exhaust thorns. At the bottom of the outer wall of the pressing plate, there are bottom wheels movably installed. On the outer walls of the bottom wheels, there are force-increasing rings. The material of the force-increasing rings is rubber. The inner wall of the bottom wheel is connected to a driving sprocket through a coupling. Inside the pressing plate, there is a chain. Inside the chain, there is a driven sprocket movably installed. The outer wall of the driven sprocket is installed with a brush through a coupling. On one side of the outer wall of the pressing plate, there is a second baffle. The softening mechanism includes liquid inlet boxes installed on the top of the outer wall of the pressing plate. The liquid inlet boxes are all installed on the outer wall of the pressing plate. On the top of the outer wall of one of the liquid inlet boxes, there is a trigger rod. On the top of the outer wall of the other liquid inlet box, there is a sensor. On the outer walls of one of the liquid inlet boxes, there are spray nozzles. Inside the liquid inlet box, there is a hose. One end of the hose is connected to a booster pump. One side of the booster pump is connected to a liquid storage cylinder. The discharging mechanism includes a feeding box installed on one side of the outer wall of the frame. Inside the feeding box, there is a water wheel movably installed. At the bottom of the water wheel, there is a movable plate movably installed. At the bottom of the outer wall of the movable plate, there is a telescopic rod. Around the outer wall of the telescopic rod, there is a spring. On one side of the outer wall of the feeding box, there is a discharge port. The tooth grooves of the driving sprocket are engaged with the chain. The tooth grooves of the driven sprocket are engaged with the chain. The installation positions of the hydraulic cylinders are inclined. The pressing plate connected to the output end of the hydraulic cylinder is upright. The installation positions of the trigger rod and the sensor are symmetrical. The sensor is electrically connected to the booster pump through an electrical signal.

[0007] Preferably, the three-dimensional view of the exhaust thorn is conical, and the cavity of the exhaust thorn is parallel to the outer wall of the exhaust thorn.

[0008] Preferably, one end of the water channel is interconnected with the top of the inner wall of the feeding box, and a water wheel is movably installed at the bottom position of the inner wall of the feeding box at one end of the water channel through a rotating shaft.

[0009] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0010] (1) By using the extrusion between the extrusion plate and the exhaust spikes, the present invention can flatten the bottle before it enters the label remover. The flattened bottle can have a larger contact area with the blades of the label remover compared to the irregularly shaped bottles after recycling. At the same time, to prevent residue on the sticky part of the label during blade scraping, while the bottle is being flattened, the brush rotates and the nozzle sprays a liquid to soften the label. In this way, the label is preliminarily softened and separated, enabling the label remover blades to better scrape off the label, thus greatly reducing the probability of label residue. Moreover, it eliminates the step of soaking and softening the label before label removal, significantly saving the time required for label removal, increasing the efficiency of label removal, saving labor costs, and further enhancing the efficiency and quality of label removal.

[0011] (2) By flattening the bottle, the present invention significantly reduces the volume of the bottle after label removal. At the same time, it reuses the softening liquid. When the traditional label remover discharges the bottles, the bottles often pile up. Due to the different sizes of the bottles and the air inside, the bottles need to be cleaned after a while. However, the present invention can pre-treat the bottles before label removal, making the bottles smaller in volume after label removal and easier to store. To prevent waste of the liquid, the present invention can also divert the liquid to the feeding box for secondary soaking and softening. And as the weight increases, the liquid and the bottles can be automatically discharged at the discharge port, without delaying the time for the bottles to enter the label remover. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0013] Figure 2 is a schematic diagram of the softening mechanism of the present invention;

[0014] Figure 3 is a schematic diagram of the structure of the chain and sprocket of the present invention;

[0015] Figure 4 is a schematic diagram of the external structure of the extrusion plate of the present invention;

[0016] Figure 5 is a schematic diagram of the connection structure between the driven sprocket and the brush of the present invention;

[0017] Figure 6 is a schematic diagram of the positional structure between the trigger rod and the sensor of the present invention;

[0018] Figure 7 is a schematic diagram of the structure of the water channel of the present invention;

[0019] Figure 8 is a schematic diagram of the connection position structure between the hydraulic cylinder and the extrusion plate of the present invention;

[0020] Figure 9 Schematic structural diagram of the exhaust thorn of the present invention;

[0021] Figure 10 Schematic structural diagram of the movable plate of the present invention;

[0022] Figure 11 Schematic structural diagram of the water wheel of the present invention;

[0023] Figure 12 Schematic exploded view of the bottom wheel of the present invention;

[0024] Figure 13 For the present invention Figure 3 Partially enlarged schematic view of the marked position A of the present invention.

[0025] In the figure: 1, machine body; 101, frame; 102, conveyor belt; 103, water channel; 104, first baffle; 2, pretreatment mechanism; 201, hydraulic cylinder; 202, extrusion plate; 203, exhaust thorn; 204, bottom wheel; 205, force increasing ring; 206, driving sprocket; 207, chain; 208, driven sprocket; 209, brush; 210, second baffle; 3, softening mechanism; 301, liquid inlet box; 302, trigger rod; 303, inductor; 304, nozzle; 305, hose; 306, booster pump; 307, liquid storage cylinder; 4, discharging mechanism; 401, feeding box; 402, water wheel; 403, movable plate; 404, telescopic rod; 405, spring; 406, discharging port. Specific embodiments

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present disclosure with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0027] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the ordinary meanings understood by those of ordinary skill in the art in the field to which the present disclosure belongs. The terms "including" or "comprising" and the like used in the present disclosure mean that the elements or objects appearing before the term cover the elements or objects listed after the term and their equivalents, without excluding other elements or objects. The terms "connected" or "coupled" and the like are not limited to physical or mechanical connections, and may also include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0028] such as Figures 1 to 13As shown in the figure, a PET bottle body label removing device provided by the present invention includes a machine body 1. On both sides of the outer wall of the machine body 1, there are pretreatment mechanisms 2 for pretreating the bottle body labels. Outside the pretreatment mechanism 2, there is a softening mechanism 3 for softening the bottle body labels. On one side of the outer wall of the machine body 1, there is a discharging mechanism 4 for conveying the pretreated bottle body out. The machine body 1 includes a frame 101. Inside the frame 101, there is a conveyor belt 102. At the bottom of the inner wall of the frame 101, there is a water channel 103. On the outer wall of the frame 101, there is a first baffle 104. The pretreatment mechanism 2 includes hydraulic cylinders 201 installed on both sides of the outer wall of the machine body 1. The output end of the hydraulic cylinder 201 is connected to a pressing plate 202. On the outer walls of the pressing plate 202, there are exhaust spikes 203. Cavities are opened on the outer walls of the exhaust spikes 203. The exhaust spikes 203 will puncture the bottle with air. Because there are cavities on the outer walls of the exhaust spikes 203, after the bottle is squeezed and punctured, the air will be discharged through the cavities of the exhaust spikes 203. At the bottom of the outer wall of the pressing plate 202, there is a bottom wheel 204 movably installed. On the outer wall of the bottom wheel 204, there is a force-increasing ring 205. The material of the force-increasing ring 205 is rubber. The rubber material force-increasing ring 205 provided on the outer wall of the bottom wheel 204 can increase the friction between the bottom wheel 204 and the outer wall of the conveyor belt 102, so that when the conveyor belt 102 moves, it will drive the bottom wheel 204 to rotate. The inner wall of the bottom wheel 204 is connected to a driving sprocket 206 through a coupling. Inside the pressing plate 202, there is a chain 207. Inside the chain 207, there is a driven sprocket 208 movably installed. On the outer wall of the driven sprocket 208, there is a brush 209 installed through a coupling. On one side of the outer wall of the pressing plate 202, there is a second baffle 210 connected. The softening mechanism 3 includes a liquid inlet box 301 installed on the top of the outer wall of the pressing plate 202. The liquid inlet boxes 301 are all installed on the outer wall of the pressing plate 202. On the top of the outer wall of one liquid inlet box 301, there is a trigger rod 302 installed. On the top of the outer wall of the other liquid inlet box 301, there is a sensor 303 installed. On the outer walls of one liquid inlet box 301, there are spray nozzles 304. Inside the liquid inlet box 301, there is a hose 305 connected. One end of the hose 305 is connected to a booster pump 306. One side of the booster pump 306 is connected to a liquid storage cylinder 307. The discharging mechanism 4 includes a feeding box 401 installed on one side of the outer wall of the frame 101. Inside the feeding box 401, there is a water wheel 402 movably installed. At the bottom of the water wheel 402, there is a movable plate 403 movably installed. At the bottom of the outer wall of the movable plate 403, there is a telescopic rod 404 installed. Around the outer wall of the telescopic rod 404, there is a spring 405 installed. On one side of the outer wall of the feeding box 401, there is a discharge port 406. The tooth grooves of the driving sprocket 206 are engaged with the chain 207. The tooth grooves of the driven sprocket 208 are engaged with the chain 207. When the driving sprocket 206 rotates, it will drive the chain 207 to move. When the chain 207 moves, it will drive the driven sprocket 208 to rotate. The installation position of the hydraulic cylinder 201 is inclined. The pressing plate 202 connected to the output end of the hydraulic cylinder 201 is upright. Since the hydraulic cylinder 201 is installed obliquely,This makes the movement trajectory of the extrusion plate 202 an inclined trajectory. Only after the extrusion plates 202 are in contact with each other, the bottom wheels 204 at the bottom of the outer wall of the extrusion plate 202 will come into contact with the outer wall of the conveyor belt 102. The installation positions of the trigger rod 302 and the sensor 303 are symmetrical. The sensor 303 is electrically connected to the booster pump 306 through an electrical signal. After being triggered, the sensor 303 will transmit the electrical signal to the booster pump 306 to start the booster pump 306. After the booster pump 306 is started, it will extract the liquid for softening the label into the interior of the liquid storage cylinder 307.

[0029] The three-dimensional view of the exhaust thorn 203 is conical. The cavity of the exhaust thorn 203 is parallel to the outer wall of the exhaust thorn 203. Two extrusion plates 202 are provided and are symmetrical. One side of the extrusion plate 202 is provided with the exhaust thorn 203 and the brush 209, and the other side of the exhaust thorn 203 is only provided with the brush 209 and a cavity adapted to the exhaust thorn 203.

[0030] One end of the water channel 103 is in communication with the top of the inner wall of the feeding box 401. One end of the water channel 103 is located at the bottom of the inner wall of the feeding box 401 and is movably installed with a water wheel 402 through a rotating shaft. The bottles entering the feeding box 401 will fall on the outer wall of the water wheel 402, and the liquid will also drip on the outer wall of the water wheel 402. The weight of the liquid will press the water wheel 402 to make the water wheel 402 rotate.

[0031] Working principle and usage process of the present invention: First, the user places the bottle on the conveyor belt 102. Then, through the limitation of the first baffle 104, the bottles are concentrated to move from the middle section of the outer wall of the conveyor belt 102. After that, the user starts the hydraulic cylinder 201. When the hydraulic cylinder 201 starts, it will drive two pressing plates 202 to move. When the pressing plates 202 move, they will press the bottles on the outer wall of the conveyor belt 102. When the pressing plates 202 press the bottles, the exhaust spikes 203 will pierce the bottles with air. Because the outer wall of the exhaust spikes 203 is provided with a cavity, after the bottles are pressed and pierced, the air will be discharged through the cavity of the exhaust spikes 203, making the bottles all be pressed into a flat shape. At the same time, when the pressing plates 202 move, they will drive the second baffle 210 to move. When the two pressing plates 202 are in contact, the second baffle 210 will also be in contact with each other to block the subsequent bottles from entering. And because the hydraulic cylinder 201 is installed obliquely, the moving track of the pressing plates 202 is an inclined track. Only after the pressing plates 202 are in contact with each other, the bottom wheels 204 at the bottom of the outer wall of the pressing plates 202 will contact the outer wall of the conveyor belt 102. The rubber material force-increasing ring 205 provided on the outer wall of the bottom wheels 204 can increase the friction between the bottom wheels 204 and the outer wall of the conveyor belt 102, so that when the conveyor belt 102 moves, it will drive the bottom wheels 204 to rotate. When the bottom wheels 204 rotate, they will drive the driving sprocket 206 connected to the inside through a coupling to rotate. When the driving sprocket 206 rotates, it will drive the chain 207 to move. When the chain 207 moves, it will drive the driven sprocket 208 to rotate. Since the inner wall of the driven sprocket 208 is connected to the brush 209 through a coupling, the brush 209 will rotate. When the brush 209 rotates, it can initially separate the labels on the bottles;

[0032] Secondly, when the pressing plates 202 are in contact with each other to press the bottles, the trigger rod 302 provided on the outer wall of the liquid inlet box 301 at the top of the pressing plates 202 will touch the sensor 303 at the top of the other pressing plate 202. After the sensor 303 is triggered, it will transmit an electrical signal to the booster pump 306 to start the booster pump 306. After the booster pump 306 starts, it will extract the liquid for softening the labels into the internal part of the liquid storage cylinder 307, discharge it into the liquid inlet box 301 through the hose 305, and then spray it on the bottles through the nozzle 304. At this time, the rotation of the brush 209 and the spraying of the nozzle 304 form a cooperation, so that the labels on the bottles can be softened while the sticky parts can be softened and separated. In this way, when the bottles enter the label stripper later, the labels are very easy to peel off. And the dripping liquid will enter the outer wall of the water channel 103 from the outer wall of the conveyor belt 102 and be discharged to the inner wall of the feeding box 401 through the water channel 103. The bottles processed on the outer wall of the conveyor belt 102 will also be transported to the inner wall of the feeding box 401 through the conveyor belt 102;

[0033] Finally, the bottles entering the feeding box 401 will fall on the outer wall of the water wheel 402, and the liquid will also drip on the outer wall of the water wheel 402. The weight of the liquid will press the water wheel 402 to make the water wheel 402 rotate. When the water wheel 402 rotates, it will evenly discharge the bottles and the liquid onto the movable plate 403 at the bottom of the inner wall of the feeding box 401. In this way, the liquid and the bottles at the bottom of the inner wall of the feeding box 401 will accumulate further, so as to achieve the second soaking and further soften the label. Due to the accumulation of weight, the movable plate 403 is pressed and drives the telescopic rod 404 and the spring 405 to contract. Since there is a certain distance between the movable plate 403 and the discharge port 406, when the movable plate 403 moves to the discharge port 406, the liquid and the bottles will be discharged through the discharge port 406 into the inlet of the label remover for label removal.

[0034] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be regarded as falling within the protection scope of the present invention.

Claims

1. A PET bottle label removal device, comprising a body (1), characterized in that: Pretreatment mechanisms (2) for pretreatment of bottle labels are arranged on both sides of the outer wall of the machine body (1); a softening mechanism (3) for softening the bottle labels is arranged outside the pretreatment mechanism (2); a discharging mechanism (4) for transmitting pretreated bottles is arranged on one side of the outer wall of the machine body (1); the machine body (1) comprises a frame (101); a conveyor belt (102) is arranged on the inner wall of the frame (101); a water channel (103) is arranged at the bottom of the inner wall of the frame (101); a first baffle (104) is installed on the outer wall of the frame (101); the pretreatment mechanism (2) comprises a hydraulic cylinder (201) installed on both sides of the outer wall of the machine body (1); an output end of the hydraulic cylinder (201) is connected to An extrusion plate (202), the outer wall of the extrusion plate (202) is provided with exhaust thorns (203), the outer wall of the exhaust thorns (203) is provided with a cavity, a bottom wheel (204) is movably mounted on the bottom of the outer wall of the extrusion plate (202), a force amplifying ring (205) is mounted on the outer wall of the bottom wheel (204), the material of the force amplifying ring (205) is rubber, the inner wall of the bottom wheel (204) is connected to a driving sprocket (206) via a coupling, a chain (207) is arranged on the inner wall of the extrusion plate (202), a driven sprocket (208) is movably mounted on the inner wall of the chain (207), a brush (209) is mounted on the outer wall of the driven sprocket (208) via a coupling, and one side of the outer wall of the extrusion plate (202) is connected to The second baffle plate (210) is connected to the softening mechanism (3), the softening mechanism (3) comprises a liquid inlet box (301) mounted on the top of the outer wall of the extrusion plate (202), the liquid inlet boxes (301) are all mounted on the outer wall of the extrusion plate (202), a trigger rod (302) is mounted on the top of the outer wall of the liquid inlet box (301) on one side, a sensor (303) is mounted on the top of the outer wall of the liquid inlet box (301) on the other side, a nozzle (304) is arranged on the outer wall of the liquid inlet box (301) on one side, the inner wall of the liquid inlet box (301) is connected to a hose (305), one end of the hose (305) is connected to a booster pump (306), and one side of the booster pump (306) is connected to a liquid storage cylinder (307), the discharging mechanism (4) comprises a nozzle (304) mounted on the frame (1 01) a feeding box (401) on one side of the outer wall, a water wheel (402) is movably mounted on the inner wall of the feeding box (401), a movable plate (403) is movably mounted on the bottom of the outer wall of the movable plate (403), a telescopic rod (404) is mounted on the bottom of the outer wall of the movable plate (403), a spring (405) is mounted around the outer wall of the telescopic rod (404), a discharge port (406) is opened on one side of the outer wall of the feeding box (401), the tooth groove of the driving sprocket (206) is meshed with the chain (207), the tooth groove of the driven sprocket (208) is meshed with the chain (207), the installation position of the hydraulic cylinder (201) is inclined, and the extrusion plate (202) connected to the output end of the hydraulic cylinder (201) is upright,The trigger rod (302) and the sensor (303) are installed symmetrically, and the sensor (303) is electrically connected to the booster pump (306) through an electrical signal.

2. A PET bottle label removal device according to claim 1, characterized in that: The exhaust thorn (203) is in a conical shape in a three-dimensional view, and the cavity of the exhaust thorn (203) is parallel to the outer wall of the exhaust thorn (203).

3. The PET bottle label removal device according to claim 1, characterized in that: One end of the water channel (103) is in communication with the top of the inner wall of the feed box (401), and one end of the water channel (103) is located at the bottom of the inner wall of the feed box (401) and is movably mounted with a water wheel (402) via a rotating shaft.

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