Processing device and processing method for plastic products before environment-friendly recycling

Abstract

The invention relates to the technical field of environment-friendly recovery of plastic products, and particularly discloses a processing device and a processing method before environment-friendly recovery of plastic products. The processing device comprises a machine body, an uncapping conveying belt is arranged on the machine body, and a pressing plate is arranged above the position, close to an outlet of the uncapping conveying belt, of the machine body in a lifting mode; a cap removing sleeve is arranged at the end, at an outlet of the cap removing conveying belt, of the machine body, a cap removing strip is arranged in the cap removing sleeve, a winding wheel is further rotationally connected into the cap removing sleeve, and a limiting plug is arranged on the side, away from the cap removing conveying belt, of the cap removing strip of the cap removing sleeve. A hydraulic cylinder used for moving the cap removing sleeve is fixedly connected to the machine body, a motor is further fixedly connected to the machine body, a cap withdrawing assembly used for withdrawing the bottle caps from the cap removing sleeve is arranged in the cap removing sleeve, and a restoring element used for restoring the cap removing strip to the initial expansion state is further arranged in the cap removing sleeve. The machine body is provided with a lifting piece used for driving the pressing plate to ascend and descend. The device has the effect of reducing the labor cost when the bottle cap is separated from the bottle body.

Description

Technical Field

[0001] The present application relates to the technical field of environmentally friendly recycling of plastic products, and in particular to a pre-processing device and method for environmentally friendly recycling of plastic products. Background Art

[0002] Plastic products are a general term for daily necessities, industrial products, etc. that are made of plastic as the main raw material, including products made from all processes such as injection molding and blister molding. Plastic is a type of synthetic polymer material with plasticity.

[0003] Plastic beverage bottles are common recyclable plastic products. The bottle bodies are mainly made of PET and PP, and the bottle caps are mainly made of PP, PE and HDPE. Before recycling and processing the plastic bottles, they need to be de-labeled (removed from the label paper wrapped around the bottle body), crushed and cleaned, sorted and melt-extruded. When recycling plastic bottles, the price of recycling the entire plastic bottle is lower than the price of recycling the bottle body alone. At the same time, there is also some market demand for recycling complete bottle caps alone.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: when separating the bottle body and the bottle cap, it is usually necessary to manually twist the bottle cap off the bottle body, which results in high labor costs and low efficiency. Summary of the invention

[0005] In order to improve the problem of high labor costs for separating bottle caps and bottle bodies, the present application provides a plastic product environmentally friendly pre-recycling processing device and processing method.

[0006] The present application provides a plastic product environmentally friendly recycling pre-processing device that adopts the following technical solution: A plastic product environmentally friendly recycling pre-processing device, comprising a machine body, characterized in that: the machine body is provided with a decapping conveyor belt with a concave surface, the machine body is provided with a pressing plate above the decapping conveyor belt near its outlet, the machine body is provided with a decapping sleeve at one end of the outlet of the decapping conveyor belt, a decapping strip is provided in the decapping sleeve, a powered winding wheel is also rotatably connected in the decapping sleeve, one end of the decapping strip is fixedly connected to the inner wall of the decapping sleeve, and the other end is wound on the peripheral wall of the winding wheel, and the decapping sleeve is provided with a limiting plug on the side of the decapping strip away from the decapping conveyor belt; A hydraulic cylinder for moving the decapping sleeve is fixedly connected to the machine body, a motor is also fixedly connected to the machine body, the hydraulic cylinder is fixedly connected to the output shaft of the motor, a decapping assembly for withdrawing the bottle cap from the decapping sleeve is arranged in the decapping sleeve, a restoring member for restoring the decapping strip to its initial expanded state is also arranged in the decapping sleeve, and a lifting member for driving the pressing plate to rise and fall is arranged on the machine body.

[0007] By adopting the above technical scheme, the plastic bottle is placed on the decapping conveyor belt with the bottle cap facing the decapping sleeve, and the plastic bottle is continuously conveyed by the decapping conveyor belt until the bottle cap is inserted into the decapping sleeve. At this time, the bottle cap presses against the limit plug and the bottle body cannot move forward. Then the winding wheel is driven to tighten the decapping strip until the decapping strip clamps the bottle cap. At the same time, the lifting member drives the pressing plate to press down so that the bottle body is fixed by the pressing plate and the decapping conveyor belt. Then the motor is turned on to rotate the decapping sleeve in the decapping direction. At this time, the bottle body is fixed and the bottle cap is driven to rotate by the decapping strip. During this process, the hydraulic cylinder synchronously pulls the decapping sleeve to move away from the bottle body to facilitate the removal of the bottle cap; when the bottle cap falls off, it rotates around the reel, causing the decapping strip to be gradually expanded to its original state by the restoration part, and then the cap-removing assembly pushes the bottle cap away from the decapping sleeve, and then the pressure plate rises, and the bottle body continues to move forward until it falls from the decapping conveyor belt, and finally the hydraulic cylinder pushes the decapping sleeve to reset. This process is mostly a process-based operation, which requires less manual operation and is more efficient, and the decapping method of the decapping strip is easy to adapt to bottle caps of various types and sizes.

[0008] Optionally, a fixed sleeve mounted on the cover-removing sleeve is fixedly connected to the machine body, a tension spring is fixedly connected to the bottom of the cover-removing sleeve, one end of the tension spring away from the cover-removing sleeve is fixedly connected to the fixed sleeve, a displacement sensor is fixedly connected to the fixed sleeve, a detection end of the displacement sensor is fixedly connected to the cover-removing sleeve, and the displacement sensor is electrically connected to the hydraulic cylinder, the motor and the winding wheel, respectively.

[0009] By adopting the above technical solution, when the cap removing sleeve rotates and the hydraulic cylinder contracts, the tension spring is lengthened and the displacement distance of the cap removing sleeve is smaller than that of the fixed sleeve, so as to avoid the damage of the bottle cap due to excessive pulling force of the hydraulic cylinder. When the bottle cap is separated from the bottle body, the cap removing sleeve moves toward the fixed sleeve due to the action of the tension spring. At this time, the data of the displacement sensor decreases rapidly, indicating that the bottle cap has been separated from the bottle body. At this time, the displacement sensor controls the unwinding of the winding wheel, stops the motor from operating, and pushes back the hydraulic cylinder.

[0010] Optionally, the cover removal assembly includes a limit ring elastically slidably connected to the cover removal sleeve, a connecting rod fixed between the limit ring and the limit plug, an elastic valve sheet fixed to the peripheral wall of the limit plug, and an exhaust probe fixed to the cover removal sleeve, the valve sheet is located on the side of the limit ring away from the cover removal strip, when the limit ring is in a free state, the limit plug is located on the side of the cover removal strip away from the cover removal conveyor belt, and the exhaust probe does not abut against the valve sheet, and when the limit plug enters the cover removal strip, the exhaust probe abuts against the valve sheet.

[0011] By adopting the above technical solution, when the hydraulic cylinder contracts, the moving stroke of the decapping sleeve is smaller than the moving stroke of the fixed sleeve, that is, the decapping sleeve and the fixed sleeve are in the process of extension. At this time, since the space between the fixed sleeve and the valve sheet increases and the pressure decreases, the external air pushes the valve sheet open and enters the fixed sleeve. When the bottle cap is separated from the bottle body, the decapping sleeve is pulled by the tension spring and moves rapidly toward the fixed sleeve. At this time, the air in the fixed sleeve is compressed, and the limit ring is pressed to move toward the direction close to the bottle cap. That is, the limit plug moves towards the bottle cap until the limit plug presses the bottle cap, and when the winding wheel unwinds, the limit plug pushes the bottle cap out to prevent the bottle cap from being tightened by the decapping strip during the decapping process and sticking to the decapping strip and unable to fall off by itself. As the limit plug enters the decapping strip, the exhaust probe pushes the valve plate, so that the valve plate cannot seal the gap between the limit ring and the limit plug, so as to facilitate the discharge of high-pressure gas in the fixed sleeve. When the air pressure in the fixed sleeve decreases, the limit ring is rebounded to the initial position, which is convenient for the subsequent decapping operation of the plastic bottle.

[0012] Optionally, an electromagnet is fixedly connected to the outer wall of the cover-removing sleeve, the limiting ring has magnetic force, the electromagnet is located at the free end of the limiting ring close to the cover-removing sleeve, and the exhaust probe is electrically connected to the electromagnet.

[0013] By adopting the above technical solution, when the cap removal is completed and the exhaust probe does not detect that it is in contact with the valve plate, the electromagnet is energized to generate a magnetic force that attracts the limit ring, causing the limit ring to move toward the electromagnet, that is, the limit plug moves toward the bottle cap, further ensuring that the bottle cap falls off smoothly from the cap removal strip, while also ensuring smooth exhaust of the fixed sleeve.

[0014] Optionally, the machine body is fixedly connected with a dual-axis movable platform on both sides of the bottle body, the output end of the dual-axis movable platform is rotatably connected with a power pressure roller, the moving directions of the dual-axis movable platform are respectively parallel to the length direction of the uncapping sleeve and perpendicular to the length direction of the uncapping sleeve along a horizontal plane, a visual sensor electrically connected to the dual-axis movable platform is fixedly connected to the machine body, the machine body is provided with a collection frame under the two power pressure rollers, the machine body is also provided with a collection frame under one end of the uncapping sleeve close to the bottle body, and a guide plate is fixedly connected to the collection frame for guiding the detached objects into the collection frame.

[0015] By adopting the above technical solution, after the decapping process is completed, since PET material has high transparency and good glossiness, and PP material is mostly translucent or opaque, the color of the bottle body is observed by a visual sensor to determine the material of the bottle body, and then the visual sensor controls the dual-axis moving table to move, so that the two power pressing rollers clamp and squeeze the bottle body, so that the bottle body is flat for easy collection. At the same time, the positions of the two power pressing rollers from the decapping conveyor belt are controlled by the visual sensor to control the bending direction of the bottle body after flattening. With the guiding effect of the guide plate, bottles of the same material can fall into the same corresponding collection frame, further omitting the sorting step during subsequent processing of the bottle body.

[0016] Optionally, a heating rod is elastically provided on the pressing plate, and the height of the heating rod is lower than the height of the pressing plate.

[0017] By adopting the above technical solution, after the bottle body is conveyed to the bottom of the pressing plate, the pressing plate descends, causing the heating rod to descend accordingly. When the pressing plate squeezes the bottle body, the heating rod also squeezes the bottle body, and the heating rod is heated to 70-100°C. Then the visual sensor synchronously monitors the bottle body under the heating rod. Since the heat resistance of PET material generally does not exceed 70°C and is easy to deform at high temperatures, while PP material can withstand high temperatures above 100°C, is not easy to deform at high temperatures, and has high impact resistance, if the bottle body is pierced at this time, it means that the bottle body is made of PET material. If the bottle body is not softened or even pierced, it means that the bottle body is made of PP material, thereby improving the accuracy of subsequent power roller material separation.

[0018] Optionally, the machine body is fixedly connected to a gas nozzle above the bottle body and is inclined to be located directly below the outlet of the decapping sleeve.

[0019] By adopting the above technical solution, when the bottle cap is separated from the bottle body, the air nozzle opens to spray air, and when the limit plug pushes out the bottle cap, the airflow sprayed from the air nozzle acts on the bottle cap, causing the bottle cap to move toward the collection frame below the outlet of the decapping sleeve, thereby preventing the bottle cap from entering other collection frames due to inertia after leaving the decapping sleeve.

[0020] Optionally, the lifting member is a plurality of electric push rods fixedly connected to the machine body and arranged on both sides of the bottle body, the pressing plate is made of a tough material, and friction pads are fixedly connected to the surface of the decapping conveyor belt and the bottom of the pressing plate.

[0021] By adopting the above technical solution, when the electric push rod pushes the pressure plate downward, the pressure plate bends due to its toughness, thereby increasing the contact area between the pressure plate and the bottle body. At the same time, the friction pad effectively increases the friction between it and the bottle body, thereby effectively improving the stability of the bottle body during the cap removal process.

[0022] Optionally, the restoration member is a plurality of elastic pull ropes distributed in a ring shape and fixed to the inner wall of the decapping sleeve, and the free ends of the elastic pull ropes are fixed to the decapping strip.

[0023] By adopting the above technical solution, after the capping is completed, the winding wheel unwinds, during which the elastic drawstring pulls the capping strip to gradually expand the capping strip so that subsequent bottle caps can enter the capping strip.

[0024] A method for pre-processing of plastic products for environmental protection recycling, comprising the following steps: S1. Loading and fixing: Place the plastic bottle on the decapping conveyor belt with the bottle cap facing the decapping sleeve, so that the plastic bottle is continuously conveyed by the decapping conveyor belt until the bottle cap is inserted into the decapping sleeve, and the pressing plate is pressed down to fix the bottle body between the decapping conveyor belt and the pressing plate, and the bottle cap is reeled around the reel so that the bottle cap is fixed by the decapping strip; S2, detection and decapping: Turn on the heating rod, so that the visual sensor monitors the bottle body in real time to detect the material of the bottle body, turn on the motor, and the decapping sleeve rotates, so that the decapping strip and the bottle cap fixed thereto rotate accordingly, and at the same time, the decapping sleeve moves away from the bottle body until the bottle cap is separated from the bottle body; S3, material separation: the limit plug pushes the bottle cap, and the uncapping strip loosens the bottle cap, so that the bottle cap is pushed out of the uncapping sleeve, and then the air nozzle blows the bottle cap into the corresponding collection frame. At the same time, the visual sensor controls the movement of the dual-axis moving table, so that the two power pressure rollers clamp and squeeze the bottle body, and cooperate with the guiding effect of the guide plate to make the bottle body fall into the corresponding collection frame.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. Drive the winding wheel to tighten the capping strip until the capping strip tightens the bottle cap. At the same time, the lifting part drives the pressing plate to press down so that the bottle body is fixed by the pressing plate and the capping conveyor belt. Then, turn on the motor to rotate the capping sleeve in the capping direction. During this process, the hydraulic cylinder synchronously pulls the capping sleeve to move away from the bottle body to facilitate the cap falling off. When the bottle cap falls off, the winding wheel rotates so that the capping strip is gradually expanded to its original state by the restoring part. Then, the capping assembly pushes the bottle cap away from the capping sleeve. Then, the pressing plate rises, and the bottle body continues to move forward until it falls from the capping conveyor belt. Finally, the hydraulic cylinder pushes the capping sleeve to reset. This process is mostly a process-based operation, which requires less manual operation and is more efficient. In addition, the capping method of the capping strip is easy to adapt to various types and sizes of bottle caps. 2. When the stripping sleeve rotates and the hydraulic cylinder contracts, the tension spring stretches and the displacement distance of the stripping sleeve is smaller than that of the fixed sleeve, so as to avoid the hydraulic cylinder from damaging the bottle cap due to excessive tension. When the bottle cap is separated from the bottle body, the stripping sleeve moves towards the fixed sleeve due to the action of the tension spring. At this time, the data of the displacement sensor decreases rapidly, indicating that the bottle cap has been separated from the bottle body. At this time, the displacement sensor controls the winding wheel to unwind, the motor stops working, and the hydraulic cylinder pushes back; 3. When the capping is finished and the exhaust probe does not detect that it is in contact with the valve plate, the electromagnet is energized to generate a magnetic force that attracts the limit ring, causing the limit ring to move toward the electromagnet, that is, the limit plug moves toward the bottle cap, further ensuring that the bottle cap falls off the capping strip smoothly, while also ensuring the smooth exhaust of the fixed sleeve; 4. After the bottle body is conveyed to the bottom of the pressing plate, the pressing plate descends. When the pressing plate squeezes the bottle body, the heating rod also squeezes the bottle body, and the heating rod is heated to 70-100℃. Then the visual sensor synchronously monitors the state of the bottle body under the heating rod. If the bottle body is pierced at this time, it means that the bottle body is made of PET material. If the bottle body is not softened or even pierced, it means that the bottle body is made of PP material. At the same time, when the decapping process is completed, since PET material has high transparency and good gloss, PP material is mostly translucent or opaque. At this time, the color of the bottle body is observed by the visual sensor. The two methods cooperate with each other, so that the visual sensor can effectively and accurately judge the material of the bottle body. Then, the visual sensor controls the position of the two power pressing rollers from the decapping conveyor belt respectively to control the bending direction of the bottle body after being flattened. With the guiding effect of the guide plate, it is convenient for bottles of the same material to fall into the same corresponding collection frame, further omitting the sorting step during the subsequent processing of the bottle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 This is a schematic diagram of the partial structure behind the dual-axis moving platform and the power pressure roller on one side hidden in the embodiment of the present application; Figure 3 The embodiment of the present application is mainly used to show the partial cross-sectional structural schematic diagram of the removal sleeve and its interior and surface as well as the interior of the fixed sleeve.

[0027] 1. Machine body; 11. Decapping conveyor belt; 12. Pressing plate; 13. Electric push rod; 2. Decapping sleeve; 21. Decapping strip; 22. Winding wheel; 23. Limit plug; 24. Electromagnet; 25. Elastic pull rope; 31. Hydraulic cylinder; 32. Motor; 4. Decapping assembly; 41. Limiting ring; 42. Connecting rod; 43. Valve plate; 44. Exhaust probe; 51. Fixed sleeve; 52. Tension spring; 53. Displacement sensor; 61. Two-axis moving platform; 62. Power pressure roller; 63. Visual sensor; 64. Heating rod; 71. Collecting frame; 72. Guide plate; 73. Air nozzle; 81. Bottle body; 82. Bottle cap. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-3 This application is described in further detail.

[0029] Embodiment 1

[0030] The present application embodiment discloses a plastic product environmentally friendly pre-recycling processing device. Figure 1 , Figure 2 and Figure 3 A plastic product environmentally friendly recycling pre-processing device includes a body 1, on which is provided a decapping conveyor belt 11 with a concave surface, a pressing plate 12 is provided on the body 1 above the decapping conveyor belt 11 near its outlet, a decapping sleeve 2 is provided at one end of the body 1 at the outlet of the decapping conveyor belt 11, a decapping strip 21 is provided in the decapping sleeve 2, and a powered winding wheel 22 is rotatably connected in the decapping sleeve 2. In the present application, the power of the winding wheel 22 is provided by a motor, one end of the decapping strip 21 is fixedly connected to the inner wall of the decapping sleeve 2, and the other end is wound on the peripheral wall of the winding wheel 22, and a limiting plug 23 is provided on the side of the decapping sleeve 2 away from the decapping conveyor belt 11. A hydraulic cylinder 31 for moving the decapping sleeve 2 is fixedly connected to the body 1, and a motor 32 is also fixedly connected to the body 1. The hydraulic cylinder 31 is fixedly connected to the output shaft of the motor 32. A decapping assembly 4 for withdrawing the bottle cap 82 from the decapping sleeve 2 is provided in the decapping sleeve 2. A restoring member for restoring the decapping strip 21 to its initial expanded state is also provided in the decapping sleeve 2. The restoring member is a plurality of elastic pull ropes 25 distributed in an annular shape and fixedly connected to the inner wall of the decapping sleeve 2. The free ends of the elastic pull ropes 25 are fixedly connected to the decapping strip 21. A lifting member for driving the pressing plate 12 to rise and fall is also provided on the body 1.

[0031] The plastic bottle is placed on the decapping conveyor belt 11 with the bottle cap 82 facing the decapping sleeve 2. The plastic bottle is continuously conveyed by the decapping conveyor belt 11 until the bottle cap 82 is inserted into the decapping sleeve 2. At this time, the bottle cap 82 presses against the limit stopper 23, so that the bottle body 81 cannot move forward. The winding wheel 22 is then driven to tighten the decapping strip 21 until the decapping strip 21 clamps the bottle cap 82. At the same time, the lifting member drives the pressing plate 12 to press down, so that the bottle body 81 is fixed by the pressing plate 12 and the decapping conveyor belt 11. The motor 32 is then turned on to rotate the decapping sleeve 2 in the decapping direction. At this time, the bottle body 81 is fixed and the bottle cap 82 is driven to rotate by the decapping strip 21. In this process, the hydraulic cylinder 31 synchronously pulls the decapping sleeve 2 away from the bottle body 81 The bottle body 81 moves forward to facilitate the falling off of the bottle cap 82; when the bottle cap 82 falls off, it rotates around the reel 22, so that the cap stripping strip 21 is pulled by the elastic pull rope 25 and gradually expands to its original state, and then the cap-removing component 4 pushes the bottle cap 82 away from the cap-removing sleeve 2, and then the pressing plate 12 rises, and the bottle body 81 continues to move forward until it falls from the cap-removing conveyor belt 11, and finally the hydraulic cylinder 31 pushes the cap-removing sleeve 2 to reset. This process is mostly a process-based operation, which requires less manual operation and has high efficiency. The cap-removing method of the cap stripping strip 21 is easy to adapt to various types and sizes of bottle caps 82. If multiple devices of the present application are combined with a bottle unscrambler (existing equipment) for feeding, the labor cost can be further reduced and the processing efficiency can be accelerated.

[0032] Reference Figure 2 and Figure 3 A fixed sleeve 51 is fixedly connected to the machine body 1 and is sleeved on the cover removing sleeve 2. A tension spring 52 is fixedly connected to the bottom of the cover removing sleeve 2. The end of the tension spring 52 away from the cover removing sleeve 2 is fixedly connected to the fixed sleeve 51. A displacement sensor 53 is fixedly connected to the fixed sleeve 51. The detection end of the displacement sensor 53 is fixedly connected to the cover removing sleeve 2. The displacement sensor 53 is electrically connected to the hydraulic cylinder 31, the motor 32 and the winding wheel 22 respectively. When the uncapping sleeve 2 rotates and the hydraulic cylinder 31 contracts, the tension spring 52 stretches and the displacement distance of the uncapping sleeve 2 is smaller than that of the fixed sleeve 51, so as to avoid the excessive tension of the hydraulic cylinder 31 from damaging the bottle cap 82. When the bottle cap 82 is separated from the bottle body 81, the tension spring 52 causes the uncapping sleeve 2 to move toward the fixed sleeve 51. At this time, the data of the displacement sensor 53 decreases rapidly, indicating that the bottle cap 82 has been separated from the bottle body 81. At this time, the displacement sensor 53 controls the unwinding of the winding wheel 22, stops the motor 32, and pushes back the hydraulic cylinder 31.

[0033] Reference Figure 1 and Figure 3The cover removal assembly 4 includes a limit ring 41 elastically slidably connected to the cover removal sleeve 2, a connecting rod 42 fixed between the limit ring 41 and the limit plug 23, an elastic valve plate 43 fixed to the peripheral wall of the limit plug 23, and an exhaust probe 44 fixed to the cover removal sleeve 2. In the present application, a spring is connected between the limit ring 41 and the inner wall of the cover removal sleeve 2, and the valve plate 43 is located on the side of the limit ring 41 away from the cover removal strip 21. When the limit ring 41 is in a free state, the limit plug 23 is located on the side of the cover removal strip 21 away from the cover removal conveyor belt 11, and the exhaust probe 44 does not abut against the valve plate 43. When the limit plug 23 enters the cover removal strip 21, the exhaust probe 44 abuts against the valve plate 43.

[0034] When the hydraulic cylinder 31 contracts, the movement stroke of the decapping sleeve 2 is smaller than the movement stroke of the fixed sleeve 51, that is, the decapping sleeve 2 and the fixed sleeve 51 are in the process of extension. At this time, since the space between the fixed sleeve 51 and the valve plate 43 increases and the pressure decreases, the external air pushes the valve plate 43 open and enters the fixed sleeve 51. When the bottle cap 82 is separated from the bottle body 81, the decapping sleeve 2 is pulled by the tension spring 52 and moves rapidly toward the fixed sleeve 51. At this time, the air in the fixed sleeve 51 is compressed, and then the limiting ring 41 is pressed and moves toward the direction close to the bottle cap 82, that is, the limiting plug 23 moves toward the bottle body 82. When the winding wheel 22 is unwinding, the limit plug 23 pushes the bottle cap 82 out to prevent the bottle cap 82 from being tightened by the decapping strip 21 during the decapping process and sticking to the decapping strip 21 and unable to fall off by itself. As the limit plug 23 enters the decapping strip 21, the exhaust probe 44 pushes the valve plate 43, so that the valve plate 43 cannot seal the gap between the limit ring 41 and the limit plug 23, so as to facilitate the discharge of the high-pressure gas in the fixed sleeve 51. When the air pressure in the fixed sleeve 51 is reduced, the limit ring 41 is rebounded to the initial position, which is convenient for the subsequent decapping operation of the plastic bottle.

[0035] Reference Figure 3 The outer wall of the decapping sleeve 2 is fixedly connected with an electromagnet 24, the limiting ring 41 has magnetic force, the electromagnet 24 is located at the limiting ring 41 near the free end of the decapping sleeve 2, and the exhaust probe 44 is electrically connected to the electromagnet 24. When the decapping is completed and the exhaust probe 44 does not detect that it is in contact with the valve plate 43, the electromagnet 24 is energized to generate a magnetic force that attracts the limiting ring 41, so that the limiting ring 41 moves in the direction close to the electromagnet 24, that is, the limiting plug 23 moves in the direction of the bottle cap 82, further ensuring that the bottle cap 82 falls off smoothly from the decapping strip 21, and also ensuring the smooth exhaust of the fixed sleeve 51.

[0036] Reference Figure 2The machine body 1 is fixedly connected with a double-axis movable platform 61 on both sides of the bottle body 81, and the output end of the double-axis movable platform 61 is rotatably connected with a power pressure roller 62. The moving directions of the double-axis movable platform 61 are respectively parallel to the length direction of the uncapping sleeve 2 and perpendicular to the length direction of the uncapping sleeve 2 along the horizontal plane. The machine body 1 is fixedly connected with a visual sensor 63 electrically connected to the double-axis movable platform 61. The machine body 1 is provided with a collection frame 71 under the two power pressure rollers 62, and the machine body 1 is also provided with a collection frame 71 under one end of the uncapping sleeve 2 close to the bottle body 81. A guide plate 72 for guiding the detached objects into the collection frame 71 is fixedly connected in the collection frame 71. A heating rod 64 is slidably connected to the pressing plate 12 through a spring, and the height of the heating rod 64 is lower than the height of the pressing plate 12.

[0037] After the bottle body 81 is conveyed to the bottom of the pressing plate 12, the pressing plate 12 descends, causing the heating rod 64 to descend accordingly. When the pressing plate 12 squeezes the bottle body 81, the heating rod 64 also squeezes the bottle body 81, and the heating rod 64 is heated to 70-100°C, 80°C in this application, and then the visual sensor 63 synchronously monitors the bottle body 81 below the heating rod 64. Since the heat resistance of PET material generally does not exceed 70°C and is easy to deform at high temperatures, while PP material can withstand high temperatures above 100°C, is not easy to deform at high temperatures, and has high impact resistance, if the bottle body 81 is pierced at this time, it means that the bottle body 81 is made of PET material. If the bottle body 81 is not softened or even pierced, it means that the bottle body 81 is made of PP material. At the same time, when the decapping process is completed, due to the PET material The transparency is high and the gloss is good. The PP material is mostly translucent or opaque. At this time, the color of the bottle body 81 is observed by the visual sensor 63. The above two methods cooperate with each other, so that the visual sensor 63 can effectively judge the material of the bottle body 81. Then the visual sensor 63 controls the dual-axis movable table 61 to move, so that the two power pressing rollers 62 clamp and squeeze the bottle body 81, so that the bottle body 81 is flattened for easy collection. At the same time, the position of the two power pressing rollers 62 from the capping conveyor belt 11 is controlled by the visual sensor 63 to control the bending direction of the bottle body 81 after being flattened. With the guiding effect of the guide plate 72, it is convenient for the bottles 81 of the same material to fall into the same corresponding collection frame 71, and the sorting step of the bottle body 81 during subsequent processing is further omitted.

[0038] Reference Figure 2 The machine body 1 is fixedly connected with an air nozzle 73 above the bottle body 81, which is inclined to be located just below the outlet of the decapping sleeve 2. When the bottle cap 82 is separated from the bottle body 81, the air nozzle 73 starts to spray air, and when the stopper 23 pushes the bottle cap 82 out, the airflow sprayed by the air nozzle 73 acts on the bottle cap 82, so that the bottle cap 82 moves toward the collection frame 71 located below the outlet of the decapping sleeve 2, and prevents the bottle cap 82 from entering other collection frames 71 due to inertia after being separated from the decapping sleeve 2.

[0039] Reference Figure 2, the lifting members are a plurality of electric push rods 13 fixedly connected to the machine body 1 and arranged on both sides of the bottle body 81. The pressing plate 12 is made of a ductile material. Friction pads (not shown in the figure) are fixedly connected to the surface of the cap-removing conveyor belt 11 and the bottom of the pressing plate 12. When the electric push rod 13 pushes the pressing plate 12 downward, since the pressing plate 12 is ductile, the pressing plate 12 bends, thereby increasing the contact area between the pressing plate 12 and the bottle body 81. At the same time, the friction pads effectively increase the friction force between it and the bottle body 81, thereby effectively improving the stability of the bottle body 81 during the cap-removing process.

[0040] In other feasible embodiments, a collection box 71 can be further added to the machine body 1, so that the four collection boxes 71 are placed in a "field" shape. The air nozzles 73 are increased to two and are located on both sides above the bottle body 81. The two air nozzles 73 are both inclined and aligned with the bottle cap 82. The air nozzles 73 are electrically connected to the visual sensor 63. A plurality of reflecting mirrors are installed on the machine body 1, so that the visual sensor 63 can also observe the bottle cap 82 through the reflecting mirrors. When it is necessary to separate the winning caps, when the visual sensor 63 monitors that the current bottle cap 82 is a winning cap, one of the air nozzles 73 blows the bottle cap 82 into one of the collection boxes 71. On the contrary, when the visual sensor 63 monitors that the bottle cap 82 is a non-winning cap, the other air nozzle 73 blows the bottle cap 82 into the other collection box 71, which is convenient for the automatic screening of winning caps and non-winning caps.

[0041] The implementation principle of an environmental protection recycling pre-processing device and processing method for plastic products in the embodiments of the present application is as follows: Place the plastic bottle on the cap-removing conveyor belt 11 with the bottle cap 82 facing the cap-removing sleeve 2. The plastic bottle is continuously conveyed by the cap-removing conveyor belt 11 until the bottle cap 82 is inserted into the cap-removing sleeve 2. At this time, the bottle cap 82顶住 the limit plug 23, resulting in the bottle body 81 being unable to move forward. Then, drive the winding wheel 22 to tighten the cap-removing strip 21 until the cap-removing strip 21箍紧 the bottle cap 82. At the same time, the electric push rod 13 drives the pressing plate 12 to press down, so that the bottle body 81 is fixed by the pressing plate 12 and the cap-removing conveyor belt 11. At the same time, the heating rod 64 also presses the bottle body 81, and the heating rod 64 is heated to 70-100 °C. Then, the visual sensor 63 synchronously monitors the state of the bottle body 81 at the position below the heating rod 64 to judge the material of the bottle body 81; Then, start the motor 32 to rotate the cap-removing sleeve 2 in the cap-removing direction. During this process, the hydraulic cylinder 31 synchronously pulls the cap-removing sleeve 2 to move away from the bottle body 81. The tension spring 52 is stretched to facilitate the脱落 of the bottle cap 82. The displacement distance of the cap-removing sleeve 2 is smaller than that of the fixed sleeve 51 to avoid damaging the bottle cap 82 due to excessive pulling force of the hydraulic cylinder 31. During this process, since the space between the fixed sleeve 51 and the valve plate 43 increases and the pressure decreases, the external air pushes open the valve plate 43 and enters the fixed sleeve 51; When the bottle cap 82 is separated from the bottle body 81, the decapping sleeve 2 is pulled by the tension spring 52 and moves quickly toward the fixed sleeve 51. At this time, the air in the fixed sleeve 51 is compressed, and the limiting ring 41 is pressed to move toward the bottle cap 82, that is, the limiting plug 23 moves toward the bottle cap 82 until the limiting plug 23 presses the bottle cap 82 and rotates around the reel 22, so that the decapping strip 21 is pulled by the elastic pull rope 25 and gradually expands to the original state. The stopper 23 pushes the bottle cap 82 out to prevent the bottle cap 82 from being clamped by the cap-removing strip 21 and adhering to the cap-removing strip 21 and being unable to fall off by itself during the cap-removing process. As the stopper 23 enters the cap-removing strip 21, the exhaust probe 44 pushes the valve plate 43, so that the valve plate 43 cannot seal the gap between the stopper ring 41 and the stopper 23, so that the high-pressure gas in the fixed sleeve 51 can be discharged. When the air pressure in the fixed sleeve 51 decreases, the stopper ring 41 is rebounded to the initial position. After the bottle cap 82 on the bottle body 81 is detached, the visual sensor 63 controls the dual-axis movable platform 61 to move, so that the two powered pressure rollers 62 clamp and squeeze the bottle body 81. The bottle body 81 is squeezed and bent by the powered pressure rollers 62, and the guiding effect of the guide plate 72 is cooperated, so that the bottle bodies 81 of the same material can all fall into the same corresponding collection frame 71, further omitting the step of sorting the bottle bodies 81 during subsequent processing.

[0042] Embodiment 2

[0043] The present application discloses a method for processing plastic products before recycling in an environmentally friendly manner. Figure 1 , Figure 2 and Figure 3 A method for pre-processing of plastic products for environmentally friendly recycling comprises the following steps: S1, loading and fixing: placing the plastic bottle on the uncapping conveyor belt 11 with the bottle cap 82 facing the uncapping sleeve 2, so that the plastic bottle is continuously conveyed by the uncapping conveyor belt 11 until the bottle cap 82 is inserted into the uncapping sleeve 2, the pressing plate 12 is pressed down, the bottle body 81 is fixed between the uncapping conveyor belt 11 and the pressing plate 12, and the bottle cap 82 is reeled around the reel 22 so that the bottle cap 82 is fixed by the uncapping strip 21; S2, detection and decapping: Turn on the heating rod 64, so that the visual sensor 63 monitors the bottle body 81 in real time to detect the material of the bottle body 81, turn on the motor 32, and the decapping sleeve 2 rotates, so that the decapping strip 21 and the bottle cap 82 fixed thereto rotate, and at the same time, the decapping sleeve 2 moves away from the bottle body 81 until the bottle cap 82 is separated from the bottle body 81; S3, material separation: the limit plug 23 pushes the bottle cap 82, and at the same time the uncapping strip 21 loosens the bottle cap 82, so that the bottle cap 82 is pushed out of the uncapping sleeve 2, and then the air nozzle 73 blows the bottle cap 82 into the corresponding collection frame 71, and at the same time the visual sensor 63 controls the dual-axis moving platform 61 to move, so that the two power pressure rollers 62 clamp and squeeze the bottle body 81, and cooperate with the guiding effect of the guide plate 72 to make the bottle body 81 also fall into the corresponding collection frame 71.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A plastic product environmentally friendly recycling pre-processing device, comprising a body (1), characterized in that: The machine body (1) is provided with a decapping conveyor belt (11) having a concave surface; the machine body (1) is provided with a pressing plate (12) above the decapping conveyor belt (11) near its outlet, and the machine body (1) is provided with a decapping sleeve (2) at one end of the outlet of the decapping conveyor belt (11); a decapping strip (21) is provided in the decapping sleeve (2); a powered winding wheel (22) is rotatably connected in the decapping sleeve (2); one end of the decapping strip (21) is fixedly connected to the inner wall of the decapping sleeve (2), and the other end is wound around the peripheral wall of the winding wheel (22); and a limiting stopper (23) is provided on the side of the decapping sleeve (2) away from the decapping conveyor belt (11); A hydraulic cylinder (31) for moving the cap-removing sleeve (2) is fixedly connected to the machine body (1), a motor (32) is also fixedly connected to the machine body (1), the hydraulic cylinder (31) is fixedly connected to the output shaft of the motor (32), a cap-removing assembly (4) for removing the bottle cap (82) from the cap-removing sleeve (2) is arranged in the cap-removing sleeve (2), a restoring member for restoring the cap-removing strip (21) to its initial expanded state is also arranged in the cap-removing sleeve (2), and a lifting member for driving the pressing plate (12) to move up and down is arranged on the machine body (1); The machine body (1) is fixedly connected with a double-axis movable platform (61) on both sides of the bottle body (81); the output end of the double-axis movable platform (61) is rotatably connected with a power pressure roller (62); the moving directions of the double-axis movable platform (61) are respectively parallel to the length direction of the decapping sleeve (2) and perpendicular to the length direction of the decapping sleeve (2) along a horizontal plane; the machine body (1) is fixedly connected with a visual sensor (63) electrically connected to the double-axis movable platform (61); the machine body (1) is provided with a collection frame (71) below the two power pressure rollers (62); the machine body (1) is also provided with a collection frame (71) below one end of the decapping sleeve (2) close to the bottle body (81); the collection frame (71) is fixedly connected with a guide plate (72) for guiding the detached objects into the collection frame (71); A heating rod (64) is elastically arranged on the pressing plate (12), and the height of the heating rod (64) is lower than the height of the pressing plate (12).

2. The device for pre-processing plastic products for environmentally friendly recycling according to claim 1, characterized in that: A fixed sleeve (51) sleeved on the cover-removing sleeve (2) is fixedly connected to the machine body (1); a tension spring (52) is fixedly connected to the bottom of the cover-removing sleeve (2); an end of the tension spring (52) away from the cover-removing sleeve (2) is fixedly connected to the fixed sleeve (51); a displacement sensor (53) is fixedly connected to the fixed sleeve (51); a detection end of the displacement sensor (53) is fixedly connected to the cover-removing sleeve (2); and the displacement sensor (53) is electrically connected to the hydraulic cylinder (31), the motor (32) and the winding wheel (22), respectively.

3. The device for pre-processing plastic products for environmentally friendly recycling according to claim 2, characterized in that: The cover removal assembly (4) comprises a limit ring (41) elastically slidably connected to the cover removal sleeve (2), a connecting rod (42) fixedly connected between the limit ring (41) and the limit plug (23), an elastic valve plate (43) fixedly connected to the peripheral wall of the limit plug (23), and an exhaust probe (44) fixedly connected to the cover removal sleeve (2), wherein the valve plate (43) is located on a side of the limit ring (41) away from the cover removal strip (21); when the limit ring (41) is in a free state, the limit plug (23) is located on a side of the cover removal strip (21) away from the cover removal conveyor belt (11), and the exhaust probe (44) does not abut against the valve plate (43); when the limit plug (23) enters into the cover removal strip (21), the exhaust probe (44) abuts against the valve plate (43).

4. The device for pre-processing plastic products for environmentally friendly recycling according to claim 3, characterized in that: An electromagnet (24) is fixedly connected to the outer wall of the cover removal sleeve (2), the limiting ring (41) has magnetic force, the electromagnet (24) is located at the free end of the limiting ring (41) close to the cover removal sleeve (2), and the exhaust probe (44) is electrically connected to the electromagnet (24).

5. The device for pre-processing plastic products for environmentally friendly recycling according to claim 1, characterized in that: The machine body (1) is fixedly connected to a gas nozzle (73) above the bottle body (81) and is inclined to be located directly below the outlet of the cap-removing sleeve (2).

6. The device for pre-processing plastic products for environmentally friendly recycling according to claim 1, characterized in that: The lifting components are a plurality of electric push rods (13) fixedly connected to the machine body (1) and arranged on both sides of the bottle body (81); the pressing plate (12) is made of a tough material; and friction pads are fixedly connected to the surface of the decapping conveyor belt (11) and the bottom of the pressing plate (12).

7. The device for pre-processing plastic products for environmentally friendly recycling according to claim 1, characterized in that: The restoration member is a plurality of elastic pull cords (25) distributed in an annular shape and fixed to the inner wall of the cover-removing sleeve (2), and the free ends of the elastic pull cords (25) are fixed to the cover-removing strip (21).

8. A method for pre-processing plastic products for environmental protection before recycling, based on a device for pre-processing plastic products for environmental protection before recycling according to any one of claims 1 to 7, characterized in that: The steps include: S1, loading and fixing: placing the plastic bottle on the cap-removing conveyor belt (11) with the bottle cap (82) facing the cap-removing sleeve (2), so that the plastic bottle is continuously conveyed by the cap-removing conveyor belt (11) until the bottle cap (82) is inserted into the cap-removing sleeve (2), the pressing plate (12) is pressed down, the bottle body (81) is fixed between the cap-removing conveyor belt (11) and the pressing plate (12), and the bottle cap (82) is reeled up by the reel (22), so that the bottle cap (82) is fixed by the cap-removing strip (21); S2, detection and decapping: turning on the heating rod (64) to enable the visual sensor (63) to monitor the bottle body (81) in real time to detect the material of the bottle body (81), turning on the motor (32), and rotating the decapping sleeve (2), so that the decapping strip (21) and the bottle cap (82) fixed thereto rotate accordingly, and at the same time, the decapping sleeve (2) moves in a direction away from the bottle body (81) until the bottle cap (82) is separated from the bottle body (81); S3, material distribution: the stopper (23) pushes the bottle cap (82), and at the same time the cap stripping strip (21) releases the bottle cap (82), so that the bottle cap (82) is pushed out of the cap stripping sleeve (2), and then the air nozzle (73) blows the bottle cap (82) into the corresponding collecting frame (71), and at the same time the visual sensor (63) controls the double-axis moving platform (61) to move, so that the two power pressure rollers (62) clamp and squeeze the bottle body (81), and cooperate with the guiding effect of the guide plate (72) to make the bottle body (81) also fall into the corresponding collecting frame (71).

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