Paperboard waste cleaning device

Abstract

The invention relates to the technical field of corrugated paper production equipment, in particular to a paperboard waste clearing device which comprises a rack, a paperboard conveying mechanism, a paper pulling reversing mechanism, a vacuum adsorption conveying mechanism and a shredded paper waste discharging mechanism are sequentially arranged on the rack in the paperboard conveying direction, and a first air blowing assembly is horizontally arranged above the paperboard conveying mechanism; the paper pulling reversing mechanism is provided with an oscillation waste removing assembly, a brush assembly and a second air blowing assembly. The vacuum adsorption conveying mechanism is connected to the tail end of the paper pulling reversing mechanism, and a third air blowing assembly and a fourth air blowing assembly are arranged on the vacuum adsorption conveying mechanism. The shredded paper waste discharging mechanism is located below the paper pulling reversing mechanism and the vacuum adsorption conveying mechanism. By means of a multi-stage collaborative waste removing mechanism, efficient separation and waste chip removal of corrugated paper presswork and offcut are achieved, and the problems that in the prior art, stubborn adhesion points are difficult to cut off effectively, waste removing is not thorough, and the presswork is prone to being damaged are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of corrugated paper production equipment technology, and in particular to a paperboard waste removal device. Background Technology

[0002] A typical corrugated paper printing production line includes a paper feeding unit, multiple printing units, a slotting unit, and a die-cutting unit. These units work in a coordinated manner under the power and transmission systems to complete a series of processing operations, including paper feeding, printing, slotting, and die-cutting of the corrugated paperboard. During production, to accelerate the die-cutting process, the die-cutting units currently use an incomplete cutting method. This means that after die-cutting, the individual corrugated paper products and the edge material are bonded together by small toothed blocks. Therefore, a waste removal process is required after die-cutting.

[0003] To separate adhered corrugated paper products and edge trimmings, and to clean up edge trimmings, prior art patent CN113878657B discloses an independent multi-stage waste removal device and method for a corrugated paper printing production line. In this device, a first, second, and third waste removal mechanism are installed on a frame and sequentially positioned above the paperboard conveying mechanism along the paperboard conveying direction. The first and third waste removal mechanisms are wind-powered, while the second is a brush-type. A baffle plate is also provided between the first and second waste removal mechanisms. The method involves the paperboard being conveyed first, where the first waste removal mechanism uses wind power to remove most of the waste paper, and the baffle plate isolates the waste paper. Then, the brush-type second waste removal mechanism further cleans the paper, separating the waste paper adhering to the paperboard surface. Finally, the third waste removal mechanism uses wind power to remove the separated waste paper.

[0004] However, in actual production, the adhesion strength of the serrated blocks between corrugated paper printed materials of different sizes varies. Furthermore, due to uneven die-cutting pressure or the inherent characteristics of the paper itself, some corrugated paper printed materials may adhere even more tightly. The existing combination of wind-powered waste removal and brush waste removal methods is insufficient to effectively cut off these stubborn adhesion points. As a result, adjacent corrugated paper printed materials are still prone to pulling on each other during subsequent conveying or stacking. This not only affects the flatness and separation efficiency of the products, but may also cause edge damage or deformation of the printed materials due to forced pulling, increasing the defect rate. Summary of the Invention

[0005] In order to address the technical deficiencies mentioned in the background art, the purpose of this invention is to provide a paperboard waste removal device, which aims to achieve efficient separation and waste removal of corrugated paper printed materials and edge materials through a multi-level collaborative waste removal mechanism.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A cardboard waste removal device includes a frame. Along the cardboard conveying direction, a cardboard conveying mechanism, a paper pulling and reversing mechanism, a vacuum adsorption conveying mechanism, and a shredded paper waste removal mechanism are sequentially arranged on the frame. A first blowing assembly is horizontally arranged above the cardboard conveying mechanism for preliminary waste removal of the cardboard. The paper pulling and reversing mechanism is equipped with a vibrating waste removal assembly, a brush assembly, and a second blowing assembly. The vacuum adsorption conveying mechanism is connected to the end of the paper pulling and reversing mechanism and is equipped with a third and a fourth blowing assembly. The shredded paper waste removal mechanism is located below the paper pulling and reversing mechanism and the vacuum adsorption conveying mechanism, and is used to receive separated shredded paper and waste scraps. The paper-pulling reversing mechanism includes at least two sets of circular belt conveyor rollers, a reversing circular belt sleeved between the circular belt conveyor rollers, and multiple sets of paper-pressing rollers located between the circular belt conveyor rollers. The two sets of circular belt conveyor rollers are installed vertically and parallel between the frame, and the surface of each set of rollers has several grooves equidistantly spaced to match the reversing circular belts. One end of each set of rollers is linked together by a synchronous belt drive mechanism. The reversing circular belts are rotatably connected to the circular belt conveyor rollers through the grooves. The paper-pressing rollers are positioned between the reversing circular belts, and their outer surfaces are in contact with the reversing circular belts. Multiple sets of belt-pulling mechanisms are located on the front and rear sides of the paper-pulling reversing mechanism to adjust the spacing between two adjacent reversing circular belts. When the paperboard is conveyed to the paper-pulling reversing mechanism by the paperboard conveying mechanism, the upper and lower sets of circular belt conveying rollers form a clamping conveying channel through the reversing circular belt. The paper-pressing belt rollers press against the reversing circular belt from the upper and lower sides, and the belt-pulling mechanism changes the position of the reversing circular belt in the groove on the circular belt conveying rollers, so that the adhered corrugated paper printing and edge material are forcibly separated by the pulling force of the reversing circular belt.

[0007] Preferably, the belt-pulling mechanism includes a movable guide rail fixed horizontally on the frame, a belt-pulling robot slidably connected to the movable guide rail, and a screw drive assembly for driving the belt-pulling robot to move. A movable plate is slidably connected to the movable guide rail via a slider. One side of the movable plate is fixedly connected to the belt-pulling robot and the screw drive assembly respectively. The end of the belt-pulling robot is provided with a belt-pulling groove adapted to the reversing circular belt. The screw drive assembly is fixed to the top of the movable guide rail and is drively connected to the belt-pulling robot.

[0008] Preferably, the belt-pulling robot includes a lever, a sliding sleeve, and a belt-pulling cylinder. One end of the moving plate is connected to the moving guide rail and the lead screw drive assembly, respectively. The sliding sleeve and the belt-pulling cylinder are fixedly mounted on the moving plate. The lever is movably mounted on the sliding sleeve, and one end of the lever is connected to the output end of the belt-pulling cylinder via a joint bearing.

[0009] Preferably, the first air blowing assembly includes an air duct support frame, an air blowing box, and multiple air blowing nozzles. The air duct support frame is fixedly connected to the frame and the cardboard conveying mechanism. The air blowing box is horizontally arranged above the cardboard conveying mechanism, and one end of the air blowing box is connected to an external air blower through an air duct. The multiple air blowing nozzles are equidistantly arranged on the air blowing box, and one end of the air blowing nozzle is oriented towards the cardboard direction, while the other end is connected to the air blowing box.

[0010] Preferably, the second and third blowing components are respectively located at the rear end of the paper pulling and reversing mechanism and the front end of the vacuum adsorption conveying mechanism. The second and third blowing components have the same structure, each including a support crossbar, a fan suspension frame and an axial flow fan. The support crossbar has a U-shaped structure and both ends of the support crossbar are fixedly connected to the frame. One end of the fan suspension frame is fixedly connected to the support crossbar, and the other end is movably connected to the axial flow fan.

[0011] Preferably, the fourth air blowing assembly includes a rear air hood and a movable mounting component. The rear air hood has a hollow box-shaped structure and is horizontally positioned above the vacuum adsorption conveying mechanism. The movable mounting component is fixedly connected to the frame and movably connected to the left and right ends of the rear air hood. An airflow inlet is provided at the top of the rear air hood, and the airflow inlet is connected to the blower through an air pipe. An airflow outlet is provided at the bottom of the rear air hood, and the airflow outlet is flat.

[0012] Preferably, the oscillating waste removal component includes at least two oscillating square tube shafts disposed below the brush assembly, the two oscillating square tube shafts being horizontally symmetrically disposed on one side of the paper pressing belt roller assembly; each oscillating square tube shaft is rotatably connected to the frame via a bearing, and one end of the oscillating square tube shaft is connected to an oscillating motor; the oscillating motor is drivenly connected to the oscillating square tube shaft via a pulley assembly.

[0013] Preferably, the brush assembly includes a brush seat, a brush fixing strip, and an oscillating brush. The brush seat is respectively disposed at both ends of the brush fixing strip and is fixedly connected to the two side walls of the frame. A fixing groove is provided at the bottom of the brush fixing strip, and the oscillating brush is installed in the fixing groove, with the bottom of the oscillating brush in contact with the surface of the cardboard.

[0014] Preferably, both the cardboard conveying mechanism and the vacuum suction conveying mechanism are provided with multiple sets of paper feed spring assemblies. Each paper feed spring assembly includes a paper press frame, a paper press spring, and a locking screw. The paper press frame is horizontally fixedly connected to the paper feed end of the cardboard conveying mechanism or the vacuum suction conveying mechanism. One end of the paper press spring is inclined upward to form a cardboard inlet and is fixed to the paper press frame by the locking screw, while the other end is in contact with the surface of the cardboard conveying mechanism or the vacuum suction conveying mechanism.

[0015] Preferably, the vacuum adsorption conveying mechanism includes a vacuum adsorption box arranged side by side on the frame and operating synchronously, and an adsorption conveyor belt wrapped around the outside of the vacuum adsorption box. The adsorption conveyor belt rotates cyclically along the outer periphery of the vacuum adsorption box, and a plurality of adsorption holes are evenly opened on the surface of the adsorption conveyor belt. The adsorption holes are connected to the vacuum adsorption box. The vacuum adsorption box is externally connected to a vacuum component through an air duct.

[0016] In summary, the beneficial effects of the present invention are as follows: The paperboard waste removal device of the present invention forms a complete multi-level collaborative waste removal mechanism through the orderly cooperation of the paperboard conveying mechanism, the paper pulling and reversing mechanism, the vacuum adsorption conveying mechanism, the belt pulling mechanism, and the shredded waste removal mechanism, combined with the first to fourth blowing components, the oscillating waste removal component, and the brush component. From the initial conveying of the paperboard and the pre-cleaning of waste with air, to the forced pulling and separation, oscillation and loosening, brush cleaning and secondary air cleaning of the paper pulling and reversing mechanism, and then to the leveling conveying and final fine air cleaning of the vacuum adsorption conveying mechanism, each waste removal unit is specifically designed to treat different types and degrees of adhesion points and waste, thereby achieving efficient and thorough separation of corrugated paper printed products and edge materials, significantly improving the quality and efficiency of waste removal, and reducing the defect rate. Attached Figure Description

[0017] Figure 1 This is an overall assembly drawing of the cardboard waste removal device of the present invention; Figure 2 This is a schematic diagram of the paperboard conveying mechanism and the paper pulling reversing mechanism in this invention; Figure 3 This is a top view of the paperboard conveying mechanism and the paper pulling reversing mechanism in this invention; Figure 4 yes Figure 3 A cross-sectional view of the AA plane; Figure 5 This is a schematic diagram of the structure of each mechanism and component in this invention; Figure 6 This is a schematic diagram of the paperboard conveying mechanism in this invention; Figure 7 This is a schematic diagram of the paper-pulling reversing mechanism in this invention; Figure 8 This is a schematic diagram of the pull-belt mechanism in this invention; Figure 9 This is a schematic diagram of the brush assembly in this invention; Figure 10 This is a schematic diagram of the vacuum adsorption conveying mechanism in this invention; Figure 11 This is a top view of the vacuum adsorption conveying mechanism in this invention; Figure 12 yes Figure 11A cross-sectional view of the BB plane.

[0018] Explanation of the reference numerals in the figure: 1. Rack; 2. Cardboard conveying mechanism; 21. Conveyor roller; 22. Belt conveyor; 23. Driven conveyor wheel; 24. Lifting cylinder; 3. Paper pulling and reversing mechanism; 31. Circular belt conveyor roller group; 311. Groove; 32. Reversing circular belt; 33. Paper pressing belt roller group; 34. Synchronous belt drive mechanism; 4. Vacuum adsorption conveying mechanism; 41. Vacuum adsorption box; 42. Adsorption conveyor belt; 421. Adsorption hole; 43. Vacuum assembly; 5. Shredder disposal system; 6. Tape-pulling mechanism; 61. Moving guide rail seat; 611. Moving plate; 62. Tape-pulling robot; 621. Pull lever; 622. Sliding sleeve; 623. Tape-pulling cylinder; 63. Screw drive assembly; 631. Servo motor; 632. Ball screw; 633. Nut seat; 7. First blower assembly; 71. Duct support frame; 72. Blower box; 73. Blower nozzle; 8. Vibrating waste removal assembly; 81. Vibrating square tube shaft; 82. Vibrating motor; 83. Pulley assembly; 9. Brush assembly; 91. Brush holder; 92. Brush fixing strip; 921. Fixing groove; 93. Vibrating brush; 10. Second air blowing assembly; 101. Support crossbar; 102. Fan suspension bracket; 103. Axial flow fan; 11. Third air blowing component; 12. Fourth air blowing assembly; 121. Rear air intake hood; 1211. Airflow inlet; 1212. Airflow outlet; 122. Movable mounting component; 13. Paper feed spring assembly; 131. Paper press holder; 132. Paper press spring; 133. Locking screw. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0020] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0021] In the description of this invention, the use of terms such as "a number" means one or more, with "more than" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while terms like "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the number of indicated technical features, or the sequential relationship between indicated technical features.

[0022] The following is in conjunction with the appendix Figure 1-12 The embodiments of a cardboard waste removal device of the present invention will be described in further detail below.

[0023] A cardboard waste removal device, such as Figure 1 As shown, the device includes a frame 1, on which a paperboard conveying mechanism 2, a paper pulling and reversing mechanism 3, a vacuum adsorption conveying mechanism 4, and a shredded paper waste discharge mechanism 5 are sequentially arranged along the paperboard conveying direction. A first blowing assembly 7 is horizontally arranged above the paperboard conveying mechanism 2 for preliminary waste removal of the paperboard. The paper pulling and reversing mechanism 3 is equipped with an oscillating waste removal assembly 8, a brush assembly 9, and a second blowing assembly 10. The vacuum adsorption conveying mechanism 4 is connected to the end of the paper pulling and reversing mechanism 3, and is equipped with a third blowing assembly 11 and a fourth blowing assembly 12. The shredded paper waste discharge mechanism 5 is located below the paper pulling and reversing mechanism 3 and the vacuum adsorption conveying mechanism 4, and is used to receive the separated shredded paper and waste.

[0024] Specifically, frame 1 is welded from square steel pipes, with adjustable support feet installed at its four corners to allow for leveling based on the flatness of the ground, ensuring the stability of the entire device during operation. Simultaneously, multiple crossbeams connect the two side uprights of frame 1, forming a stable frame structure that provides robust support for the installation of each mechanism. The cardboard conveying mechanism 2, as the starting point of the device, is primarily responsible for smoothly and continuously conveying the corrugated paper printed materials (hereinafter referred to as cardboard) to be disposed of from the front-end equipment or storage area to the subsequent waste disposal unit.

[0025] In this embodiment, as Figure 2-6As shown, the cardboard conveying mechanism 2 includes a conveyor roller 21, a belt conveyor 22, a driven conveyor wheel 23, and a lifting cylinder 24. The belt conveyor 22 is sleeved on the outer surface of the conveyor roller 21 and the driven conveyor wheel 23. The two ends of the conveyor roller 21 are rotatably mounted on the frame 1 via bearings, and the conveyor roller 21 is rotatably connected to one of the paper pressure roller groups 33 via a pulley assembly 83. One end of the lifting cylinder 24 is fixedly mounted on the frame 1 via a hinge seat, and the other end is connected to the cardboard conveying mechanism 2 via a transmission connection. Under the action of the lifting cylinder 24, the cardboard conveying mechanism 2 can be adjusted according to the height of the equipment in the previous die-cutting process, so that it can stably support and convey the cardboard. The belt conveyor 22 is made of rubber with a certain frictional force to prevent the cardboard from slipping during the conveying process.

[0026] In this embodiment, as Figure 1 , 2 As shown, the first blowing assembly 7 is horizontally positioned above the cardboard conveying mechanism 2. Its function is to perform preliminary airflow cleaning on the surface and edges of the cardboard before it enters the paper pulling and reversing mechanism 3, blowing away some loose debris and easily separable edge material. The first blowing assembly includes a duct support frame 71, a blowing box 72, and multiple blowing nozzles 73. The duct support frame 71 is welded from angle steel or square tubing, with one end fixedly connected to the side plate of the frame 1, and the other end connected to the mounting seat of the driven conveying wheel 23 of the cardboard conveying mechanism 2, forming a stable support.

[0027] Specifically, the blower box 72 has a rectangular hollow structure and is horizontally positioned directly above the cardboard conveying mechanism 2, with its length slightly greater than the width of the cardboard. One end of the blower box 72 is connected to a high-pressure blower via a flexible duct, while the other end is closed. Multiple blower nozzles 73 are equidistantly arranged and fixedly installed at the bottom of the blower box 72. One end of each nozzle 73 faces the belt conveyor 22 of the cardboard conveying mechanism 2, and the distance between its outlet and the cardboard surface can be adjusted according to actual waste removal needs. The other end is connected to the internal cavity of the blower box 72. The nozzles 73 can be flat or duckbill shaped to create a flat airflow, improving the removal effect of waste. When the cardboard is conveyed on the belt conveyor 22 past the first blower assembly 7, the airflow generated by the high-pressure blower enters the blower box 72 through the duct and is then evenly blown onto the surface and edges of the cardboard through each nozzle 73, blowing off the attached dust, fine paper scraps, and some incompletely adhered edge material. These blown-off waste chips will fall directly into the preliminary chip collection trough set below the cardboard conveyor 2, or be guided to the shredded paper discharge mechanism 5.

[0028] The paper-pulling reversing mechanism 3 is the core mechanism of this invention for forcibly separating stubborn adhesive points, and it is located at the end of the paperboard conveying mechanism 2. In this embodiment, as... Figure 3-7As shown, the paper-pulling reversing mechanism 3 includes at least two sets of circular belt conveyor roller groups 31, a reversing circular belt 32 sleeved between the circular belt conveyor roller groups 31, and multiple sets of paper-pressing belt roller groups 33 located between the circular belt conveyor roller groups 31. The two sets of circular belt conveyor roller groups 31 are installed vertically and parallel between the two side uprights of the frame 1. Each set of circular belt conveyor roller groups 31 consists of a roller shaft and multiple circular pulleys fixedly sleeved on the roller shaft. The surface of the circular pulleys is provided with several annular grooves 311 that are adapted to the reversing circular belt 32. The width of the grooves 311 matches the width of the reversing circular belt 32, and the depth is slightly greater than the thickness of the reversing circular belt 32.

[0029] Specifically, the roller ends on the same side of the two sets of circular belt conveyor roller groups 31 are respectively equipped with synchronous pulleys, which are linked together by a synchronous belt drive mechanism 34 (including a synchronous belt and a tensioning pulley) and driven by the same drive source (such as a geared motor). This ensures that the upper and lower sets of circular belt conveyor roller groups 31 rotate in opposite directions but have the same linear speed, thereby forming a clamping and conveying force for the cardboard. The reversing circular belts 32 are made of high-strength, high-elasticity polyurethane circular belts, and their number corresponds to the number of grooves 311 on the circular belt pulleys. Each reversing circular belt 32 is embedded in the groove 311 of the corresponding upper and lower circular belt pulleys, forming multiple parallel clamping and conveying lines. The pressure belt roller group 33 is arranged between the upper and lower reversing circular belts 32. Its number is the same as or slightly less than the number of reversing circular belts 32. Each pressure belt roller group 33 includes an upper pressure roller and a lower pressure roller. The upper pressure roller and the lower pressure roller are respectively mounted on an adjustable bracket through bearing seats. Their outer surfaces are in contact with the inner surfaces of the upper and lower reversing circular belts 32, respectively, to press the reversing circular belts 32 into the grooves 311 of the circular belt pulley, to prevent the reversing circular belts 32 from coming out of the grooves 311 during operation, and to ensure the clamping force on the paperboard.

[0030] When the cardboard is conveyed by the cardboard conveying mechanism 2 to the inlet end of the paper pulling and reversing mechanism 3, it first enters the clamping and conveying channel formed by the upper and lower sets of circular conveyor rollers 31 and the reversing circular belts 32. Multiple sets of belt-pulling mechanisms 6 are provided on the front and rear sides of the paper pulling and reversing mechanism 3 (i.e., near the cardboard entry and exit points). Each set of belt-pulling mechanisms 6 corresponds to one or more reversing circular belts 32 and is used to adjust the spacing between adjacent reversing circular belts 32. In this embodiment, as... Figure 1 , 2 As shown in Figure 8, the tape-pulling mechanism 6 includes a movable guide rail seat 61 horizontally fixed to the two upright plates on both sides of the frame 1, a tape-pulling robot 62 slidably connected to the movable guide rail seat 61, and a screw drive assembly 63 for driving the tape-pulling robot 62 to move. The movable guide rail seat 61 has a cuboid structure with a T-shaped or dovetail-shaped groove on its top. A slider is fitted inside the groove, and a movable plate 611 is fixedly connected to the top of the slider. One side of the movable plate 611 is fixedly connected to the tape-pulling robot 62, and the other side is fixedly connected to the nut seat of the screw drive assembly 63.

[0031] Specifically, the belt-pulling robot 62 includes a lever 621, a sliding sleeve 622, and a belt-pulling cylinder 623. The sliding sleeve 622 and the belt-pulling cylinder 623 are fixedly mounted on the moving plate 611. The lever 621 is movably inserted into the sliding sleeve 622 and can move axially along the sliding sleeve 622. One end of the lever 621 near the reversing circular belt 32 has a belt-pulling groove adapted to the reversing circular belt 32, and the other end is connected to the output end of the belt-pulling cylinder 623 via a spherical bearing. The width of the belt-pulling groove is slightly larger than the diameter of the reversing circular belt 32. When the belt-pulling robot 62 moves, the belt-pulling groove can engage with the edge of the reversing circular belt 32, thereby pushing the reversing circular belt 32 to move laterally within the groove 311 of the circular belt conveyor roller group 31, changing the spacing between adjacent reversing circular belts 32.

[0032] The lead screw drive assembly 63 is fixed to the top of the movable guide rail base 61, and its output end is connected to the belt-pulling robot 62 for transmission. By precisely controlling the rotation angle of the lead screw, the displacement of the belt-pulling robot 62 can be precisely controlled. The lead screw drive assembly 63 includes a servo motor 631, a ball screw 632, and a nut seat 633. The ball screw 632 is horizontally mounted on one side of the top of the movable guide rail base 61 through a bearing seat, and one end of it is connected to the output shaft of the servo motor 631 through a coupling. The nut seat 633 is sleeved on the ball screw 632 and fixed to the movable plate 611.

[0033] Specifically, the working process of the paper-pulling reversing mechanism 3 is as follows: When it is necessary to adjust the position of a certain reversing circular belt 32, firstly, the belt-pulling cylinder 623 extends, driving the lever 621 to move towards the reversing circular belt 32, so that the belt-pulling groove locks the reversing circular belt 32; then, the servo motor 631 starts, driving the ball screw 632 to rotate, causing the nut seat 633 and the moving plate 611 to move along the moving guide rail seat 61, and the lever 621 moves accordingly, thereby causing the reversing circular belt 32 to slide laterally in the groove 311 of the circular belt conveyor roller group 31, changing its position on the circular belt conveyor roller group 31. By controlling the servo motor actions of different belt-pulling mechanisms 6, the spacing between adjacent reversing circular belts 32 can be made different, or the movement trajectory of some reversing circular belts 32 can be made to form a certain angular deviation from other reversing circular belts 32. When the cardboard is conveyed between the upper and lower reversing circular belts 32, the position of the reversing circular belts 32 on the circular belt conveyor roller group 31 changes, resulting in slight differences in the direction and magnitude of the conveying force applied to the cardboard by each reversing circular belt 32. This exerts a combined tensile force on the cardboard in both the transverse and longitudinal directions. This combined tensile force can effectively act on stubborn adhesive points on the cardboard, forcibly tearing them apart and achieving the initial separation of printed materials from edge materials.

[0034] In this embodiment, as Figure 4 , 5As shown, a vibrating waste removal assembly 8 is also provided below the clamping and conveying channel. The vibrating waste removal assembly 8 includes at least two vibrating square tube shafts 81 disposed below the brush assembly 9. The two vibrating square tube shafts 81 are horizontally and parallel to each other on one side of the paper pressure belt roller group 33 (usually located in the middle and rear section of the paperboard conveying direction). The two ends of each vibrating square tube shaft 81 are rotatably connected to the two side uprights of the frame 1 through bearing seats, and one end of the vibrating square tube shaft 81 extends out of the frame 1 and is connected to a vibrating motor 82. The vibrating motor 82 is fixed to the side uprights of the frame 1 by a motor mount, and its output shaft is drivenly connected to the end of the vibrating square tube shaft 81 through a pulley assembly 83 (including a driving pulley, a driven pulley, and a drive belt).

[0035] Specifically, the surface of the oscillating square tube shaft 81 can be provided with several protrusions or rubber striking blocks. When the oscillating motor 82 starts, it drives the oscillating square tube shaft 81 to rotate at high speed through the pulley assembly 83. The protrusions or rubber striking blocks on its surface will perform high-frequency, slight tapping and vibration on the bottom of the cardboard that is passing through. This oscillation effect can further loosen the residual adhesive points on the cardboard, especially those small connection points that have not been completely separated after the initial pulling by the paper pulling and reversing mechanism 3, and shake off the waste attached to the surface of the cardboard, preparing for subsequent brush cleaning and wind-powered waste removal.

[0036] In this embodiment, as Figure 4 , 9 As shown, the brush assembly 9 is positioned above or to the side of the paper pulling and reversing mechanism 3, and is used to physically clean the surface of the cardboard after it has undergone vibration cleaning. The brush assembly 9 includes a brush holder 91, a brush fixing strip 92, and a vibrating brush 93.

[0037] Specifically, the brush holder 91 is an L-shaped plate structure, respectively located at both ends of the brush fixing strip 92. The brush holder 91 is fixedly connected to the two side walls of the frame 1 by bolts, and its height can be adjusted through the oblong hole. The brush fixing strip 92 is long and narrow, with a fixing groove 921 extending along its length at the bottom. The handle of the vibrating brush 93 is embedded and fixed in the fixing groove 921. The length and hardness of the vibrating brush 93 are selected according to the material of the cardboard and the surface printing condition to ensure that it can effectively clean up waste without damaging the surface of the printed matter. The bottom bristles of the vibrating brush 93 are in contact with the surface of the cardboard, and the contact pressure can be controlled by adjusting the height of the brush holder 91. When the cardboard is conveyed in the paper pulling and reversing mechanism 3, the vibrating brush 93 continuously brushes its surface, sweeping off the loose waste and tightly adhered paper scraps after vibration cleaning.

[0038] In this embodiment, as Figure 5 , 10As shown, the second blowing assembly 10 is located at the end of the paper pulling reversing mechanism 3, near the entrance of the vacuum adsorption conveying mechanism 4. It is used to perform a second air-powered waste removal on the paperboard after it has been processed by the paper pulling reversing mechanism 3, removing new waste debris generated during the vibration and brush cleaning process, as well as small edge materials that have not yet fallen off.

[0039] Specifically, the second air-blowing assembly includes a support crossbar 101, a fan suspension bracket 102, and an axial flow fan 103. The support crossbar 101 has a U-shaped structure, with both ends fixedly connected to the upright plates on both sides of the frame 1 by bolts, located above the end of the paper-pulling reversing mechanism 3. One end of the fan suspension bracket 102 is fixedly connected to the support crossbar 101 by clamps or bolts, and the other end is movably connected to the axial flow fan 103 by a rotating shaft or universal joint, allowing the blowing angle of the axial flow fan 103 to be adjusted within a certain range. The axial flow fan 103 is selected from models with certain air pressure and air volume, and its air outlet can be equipped with an air guide hood to concentrate the airflow.

[0040] It should be noted that the blowing direction of the second blowing assembly 10 is usually oblique to the conveying direction of the cardboard or vertically downward, to ensure that the waste on the surface and edges of the cardboard is blown to the shredded waste discharge mechanism 5 below.

[0041] In this embodiment, as Figure 10-12 As shown, the cardboard, after undergoing multi-stage waste removal treatment by the paper pulling and reversing mechanism 3, is output from its end and enters the vacuum adsorption conveying mechanism 4. The vacuum adsorption conveying mechanism 4 is connected to the end of the paper pulling and reversing mechanism 3. Its main function is to use vacuum adsorption force to smoothly adsorb the cardboard onto the conveyor belt, preventing it from shifting, wrinkling, or warping during subsequent conveying, and providing a stable platform for the final waste removal. The vacuum adsorption conveying mechanism 4 includes a vacuum adsorption box 41 arranged side-by-side on the frame 1 and operating synchronously, an adsorption conveyor belt 42 wrapped around the outside of the vacuum adsorption box 41, and a transmission assembly that drives the adsorption conveyor belt 42.

[0042] Specifically, the vacuum adsorption box 41 is a hollow cuboid structure with flat top and bottom and curved transition surfaces at both ends to accommodate the running trajectory of the adsorption conveyor belt 42. The adsorption conveyor belt 42 is a high-strength, low-permeability annular belt with a number of uniformly distributed adsorption holes 421 on its surface. The distribution density of the adsorption holes 421 is designed according to the weight and size of the cardboard. The adsorption conveyor belt 42 is fitted around the outer periphery of the vacuum adsorption box 41, and its inner side is in contact with the top, bottom, and curved surfaces at both ends of the vacuum adsorption box 41. The transmission assembly includes a drive roller, a driven roller, and a drive motor. The drive roller and the driven roller are respectively located at the front and rear ends of the vacuum adsorption box 41. The adsorption conveyor belt 42 is wound between the drive roller and the driven roller. The drive motor drives the drive roller to rotate, thereby causing the adsorption conveyor belt 42 to circulate around the outer periphery of the vacuum adsorption box 41.

[0043] Vacuum components 43 (such as vacuum pumps or vacuum generators) are connected to one or both ends of the vacuum adsorption box 41 via air ducts. When the vacuum components 43 are working, they create negative pressure inside the vacuum adsorption box 41. When the adsorption holes 421 on the adsorption conveyor belt 42 move to the top area of ​​the vacuum adsorption box 41 with the conveyor belt, the cardboard is firmly adsorbed onto the surface of the adsorption conveyor belt 42 under the action of negative pressure because this area is connected to the inside of the vacuum adsorption box 41, achieving flat conveying and effectively avoiding wrinkles or displacement of the cardboard due to its own weight or external wind force. This provides a stable working platform for the precise waste removal of the third and fourth blowing components 12.

[0044] In this embodiment, as Figure 11 , 12 As shown, the vacuum adsorption conveying mechanism 4 is also equipped with a third blowing assembly 11 and a fourth blowing assembly 12. The third blowing assembly 11 is located above the front end of the vacuum adsorption conveying mechanism 4, near the outlet of the paper pulling reversing mechanism 3. Its structure is the same as that of the second blowing assembly, both including a support crossbar 101, a fan suspension bracket 102, and an axial flow fan 103. The support crossbar 101 has a U-shaped structure, with both ends fixedly connected to the frame 1. One end of the fan suspension bracket 102 is fixed to the support crossbar 101, and the other end is movably connected to the axial flow fan 103, allowing adjustment of the blowing angle and height of the axial flow fan 103.

[0045] Furthermore, the function of the third blowing assembly 11 is to blow air again on the cardboard that has just entered the vacuum adsorption conveying mechanism 4 to remove any waste that may remain at the end of the paper pulling and reversing mechanism 3, especially the small paper scraps newly generated at the edge of the cardboard after being pulled and separated by the paper pulling and reversing mechanism 3.

[0046] In this embodiment, as Figure 10-12 As shown, the fourth blowing assembly 12 is located above the middle and rear section of the vacuum adsorption conveying mechanism 4, and is used for the final airflow cleaning of the cardboard, thoroughly removing small debris from the surface and edges. Figure 12 As shown, the fourth blowing assembly 12 includes a rear air intake hood 121 and a movable mounting component 122. The rear air intake hood 121 is a hollow box-shaped structure with a trapezoidal or arc-shaped cross-section, positioned horizontally above the vacuum adsorption conveying mechanism 4, with a length slightly greater than the width of the cardboard. The movable mounting component 122 is an L-shaped bracket, fixedly connected to the two side uprights of the frame 1. The left and right ends of the rear air intake hood 121 are movably connected to the movable mounting component 122 via pins or sliders, allowing for fine-tuning of the height and angle of the rear air intake hood 121.

[0047] Furthermore, the top of the rear exhaust hood 121 is provided with one or more airflow inlets 1211, which are connected to an exhaust fan (which can be a high-pressure blower or a vortex air pump) via air pipes. The bottom of the rear exhaust hood 121 is provided with an airflow outlet 1212, which is a flat, elongated slit with a length approximately equal to the length of the rear exhaust hood 121, and a width designed according to the required airflow velocity and pressure. When the exhaust fan is operating, a high-speed airflow is blown out from the flat airflow outlet 1212 at the bottom of the rear exhaust hood 121, forming a uniform air curtain that blows down onto the vacuum-adsorbed cardboard surface. Because the cardboard is firmly adsorbed, it will not be blown over by the airflow, while fine debris will be completely blown away from the cardboard surface by this strong and uniform airflow.

[0048] In this embodiment, as Figure 4 As shown, the shredder waste discharge mechanism 5 is located directly below the paper pulling and reversing mechanism 3 and the vacuum adsorption conveying mechanism 4. It is used to uniformly receive and discharge the shredded paper scraps and waste separated during each stage of waste removal. The shredder waste discharge mechanism 5 can be a belt conveyor, which is positioned directly below the paper pulling and reversing mechanism 3 and the vacuum adsorption conveying mechanism 4, so that it can cover the area below the paper pulling and reversing mechanism 3 and the vacuum adsorption conveying mechanism 4, ensuring that all falling waste scraps and scraps can be collected.

[0049] In addition, to accommodate paperboards of different thicknesses, multiple sets of paper feed spring assemblies 13 are provided at the paper feed ends of both the paperboard conveying mechanism 2 and the vacuum suction conveying mechanism 4 to guide the paperboard smoothly into each conveying mechanism and prevent paper jams. Figure 2 , 10 As shown in Figures 1 and 12, the paper feed spring assembly 13 includes a paper presser 131, a paper press spring 132, and a locking screw 133.

[0050] Specifically, the paper pressing frame 131 is made of angle iron or flat steel and is horizontally fixed to the mounting base of the active conveyor roller 21 of the cardboard conveying mechanism 2 or the mounting base of the active roller of the vacuum adsorption conveying mechanism 4. The paper pressing spring 132 is made of thin steel plate or phosphor bronze sheet with a certain degree of elasticity. One end of it is tilted upward to form a smooth cardboard inlet guide surface and is fixed to the paper pressing frame 131 by locking screws 133. The other end hangs down naturally or is slightly bent, and makes slight contact with the surface of the belt conveyor 22 of the cardboard conveying mechanism 2 or the surface of the adsorption conveyor belt 42 of the vacuum adsorption conveying mechanism 4. When the front end of the cardboard enters, it will push up the free end of the paper pressing spring 132. Under the action of the spring's own elasticity, the other end of the paper pressing spring 132 will gently press on the surface of the cardboard, ensuring that the cardboard can enter the conveying channel smoothly and accurately, avoiding skewing or jamming.

[0051] In summary, the cardboard waste removal device of the present invention, through the orderly cooperation of the cardboard conveying mechanism 2, the paper pulling and reversing mechanism 3, the vacuum adsorption conveying mechanism 4, and the shredded paper waste removal mechanism 5, and combined with the first to fourth blowing components 12, the oscillating waste removal component 8, and the brush component 9, forms a complete multi-level collaborative waste removal mechanism. From the initial conveying and pre-cleaning of the cardboard with air, to the forced pulling and separation, oscillation and loosening, brush cleaning and secondary air cleaning of the paper pulling and reversing mechanism 3, and then to the leveling conveying and final fine air cleaning of the vacuum adsorption conveying mechanism 4, each waste removal unit is specifically designed to treat different types and degrees of adhesion points and waste, thereby achieving efficient and thorough separation of corrugated paper printed products and edge materials, significantly improving the quality and efficiency of waste removal, and reducing the defect rate.

[0052] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cardboard waste removal device, comprising a frame, characterized in that, The frame is sequentially equipped with a paperboard conveying mechanism, a paper pulling and reversing mechanism, a vacuum adsorption conveying mechanism, and a shredded paper waste discharge mechanism along the paperboard conveying direction. A first blowing assembly is horizontally positioned above the paperboard conveying mechanism for preliminary waste removal from the paperboard. The paper pulling and reversing mechanism is equipped with a vibration waste removal assembly, a brush assembly, and a second blowing assembly. The vacuum adsorption conveying mechanism is connected to the end of the paper pulling and reversing mechanism and is equipped with a third and a fourth blowing assembly. The shredded paper waste discharge mechanism is located below the paper pulling and reversing mechanism and the vacuum adsorption conveying mechanism, and is used to receive the separated shredded paper and waste. The paper-pulling reversing mechanism includes at least two sets of circular belt conveyor rollers, a reversing circular belt sleeved between the circular belt conveyor rollers, and multiple sets of paper-pressing rollers located between the circular belt conveyor rollers. The two sets of circular belt conveyor rollers are installed vertically and parallel between the frame, and the surface of each set of rollers has several grooves equidistantly spaced to match the reversing circular belts. One end of each set of rollers is linked together by a synchronous belt drive mechanism. The reversing circular belts are rotatably connected to the circular belt conveyor rollers through the grooves. The paper-pressing rollers are positioned between the reversing circular belts, and their outer surfaces are in contact with the reversing circular belts. Multiple sets of belt-pulling mechanisms are located on the front and rear sides of the paper-pulling reversing mechanism to adjust the spacing between two adjacent reversing circular belts. When the paperboard is conveyed to the paper-pulling reversing mechanism by the paperboard conveying mechanism, the upper and lower sets of circular belt conveying rollers form a clamping conveying channel through the reversing circular belt. The paper-pressing belt rollers press against the reversing circular belt from the upper and lower sides, and the belt-pulling mechanism changes the position of the reversing circular belt in the groove on the circular belt conveying rollers, so that the adhered corrugated paper printing and edge material are forcibly separated by the pulling force of the reversing circular belt.

2. The cardboard waste removal device according to claim 1, characterized in that, The belt-pulling mechanism includes a movable guide rail fixed horizontally on the frame, a belt-pulling robot slidably connected to the movable guide rail, and a screw drive assembly for driving the belt-pulling robot to move. A movable plate is slidably connected to the movable guide rail via a slider. One side of the movable plate is fixedly connected to the belt-pulling robot and the screw drive assembly respectively. The end of the belt-pulling robot is provided with a belt-pulling groove adapted to the reversing circular belt. The screw drive assembly is fixed to the top of the movable guide rail and is drively connected to the belt-pulling robot.

3. The cardboard waste removal device according to claim 2, characterized in that, The belt-pulling robot includes a lever, a sliding sleeve, and a belt-pulling cylinder. One end of the moving plate is connected to the moving guide rail and the lead screw drive assembly, respectively. The sliding sleeve and the belt-pulling cylinder are fixedly mounted on the moving plate. The lever is movably mounted on the sliding sleeve, and one end of the lever is connected to the output end of the belt-pulling cylinder through a joint bearing.

4. The cardboard waste removal device according to claim 1, characterized in that, The first air blowing assembly includes an air duct support frame, an air blowing box, and multiple air blowing nozzles. The air duct support frame is fixedly connected to the frame and the cardboard conveying mechanism. The air blowing box is horizontally arranged above the cardboard conveying mechanism, and one end of the air blowing box is connected to an external air blower through an air duct. The multiple air blowing nozzles are equidistantly arranged on the air blowing duct, with one end of the air blowing nozzle facing the cardboard direction and the other end connected to the air blowing box.

5. The cardboard waste removal device according to claim 1, characterized in that, The second and third air blowing components are respectively located at the rear end of the paper pulling and reversing mechanism and the front end of the vacuum adsorption conveying mechanism. The second and third air blowing components have the same structure, both including a support crossbar, a fan suspension frame and an axial flow fan. The support crossbar has a U-shaped structure and both ends of the support crossbar are fixedly connected to the frame. One end of the fan suspension frame is fixedly connected to the support crossbar, and the other end is movably connected to the axial flow fan.

6. The cardboard waste removal device according to claim 1, characterized in that, The fourth air blowing assembly includes a rear air hood and a movable mounting component. The rear air hood has a hollow box-shaped structure and is horizontally positioned above the vacuum adsorption conveying mechanism. The movable mounting component is fixedly connected to the frame and movably connected to the left and right ends of the rear air hood. An airflow inlet is provided at the top of the rear air hood, and the airflow inlet is connected to the blower through an air pipe. An airflow outlet is provided at the bottom of the rear air hood, and the airflow outlet is flat.

7. The cardboard waste removal device according to claim 1, characterized in that, The oscillating waste removal component includes at least two oscillating square tube shafts disposed below the brush assembly. The two oscillating square tube shafts are horizontally symmetrically disposed on one side of the paper pressing belt roller assembly. Each oscillating square tube shaft is rotatably connected to the frame via a bearing, and one end of the oscillating square tube shaft is connected to an oscillating motor. The oscillating motor is driven by the oscillating square tube shaft via a pulley assembly.

8. The cardboard waste removal device according to claim 1, characterized in that, The brush assembly includes a brush holder, a brush fixing strip, and an oscillating brush. The brush holder is respectively disposed at both ends of the brush fixing strip and is fixedly connected to the two side walls of the frame. A fixing groove is provided at the bottom of the brush fixing strip, and the oscillating brush is installed in the fixing groove, with the bottom of the oscillating brush in contact with the surface of the cardboard.

9. The cardboard waste removal device according to claim 1, characterized in that, Both the cardboard conveying mechanism and the vacuum adsorption conveying mechanism are equipped with multiple sets of paper feed spring assemblies. Each paper feed spring assembly includes a paper press frame, a paper press spring, and a locking screw. The paper press frame is horizontally fixed to the paper feed end of the cardboard conveying mechanism or the vacuum adsorption conveying mechanism. One end of the paper press spring is inclined upward to form a cardboard inlet and is fixed to the paper press frame by the locking screw. The other end is in contact with the surface of the cardboard conveying mechanism or the vacuum adsorption conveying mechanism.

10. The cardboard waste removal device according to claim 1, characterized in that, The vacuum adsorption conveying mechanism includes a vacuum adsorption box arranged side by side on the frame and operating synchronously, and an adsorption conveyor belt wrapped around the outside of the vacuum adsorption box. The adsorption conveyor belt rotates cyclically along the outer periphery of the vacuum adsorption box, and a number of adsorption holes are evenly opened on the surface of the adsorption conveyor belt. The adsorption holes are connected to the vacuum adsorption box. The vacuum adsorption box is connected to a vacuum component through an air duct.

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