A paperboard slitting device

Abstract

This utility model discloses a cardboard cutting device, including a cardboard conveying mechanism, a cutting mechanism, and a tension adjustment mechanism. The cardboard conveying mechanism includes a conveyor roller and a conveyor belt. The tension adjustment mechanism includes a lifting tension wheel for adjusting the tension of the conveyor belt and a lifting drive component. The cutting mechanism includes a cutting unit group and a rotating shaft. The cutting unit group is arranged on both sides of the conveyor belt and includes a longitudinal semi-circular blade, a first transverse flat blade, and a second transverse flat blade. The first transverse flat blade and the second transverse flat blade are respectively connected to the end point and the start point of the longitudinal semi-circular blade. This utility model effectively reduces friction and damage to the cardboard during the conveying process by cooperating with the conveyor roller and the conveyor belt. By adjusting the lifting tension wheel, the tension of the conveyor belt can be precisely controlled to ensure that the cardboard passes smoothly through the cutting mechanism and to guarantee the quality of the finished product. The cutting unit group cuts the cardboard in one operation, and the rotating shaft drives the cutting unit group to achieve continuous operation, simplifying the process, reducing costs, and improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of cardboard cutting, and in particular to a cardboard cutting device. Background Technology

[0002] Cardboard is typically cut at the four corners of its outer surface, followed by grooving on the inner surface to allow the corners to fall off. In existing technology, the cardboard cutting process involves a transverse drive mechanism that moves the first blade laterally to cut the cardboard and then moves it upwards to avoid obstruction. Subsequently, a second blade is driven to move longitudinally to cut the cardboard, and after completing the second cut, it moves upwards to avoid obstruction. This process involves multiple steps, a complex structure, and low efficiency. Alternatively, the cardboard can be fed into a longitudinal cutting device, and after longitudinal cutting, it can be fed into a transverse cutting device, which is costly and inefficient.

[0003] In addition, existing cardboard conveying devices are usually planar conveyors such as conveyor belts. When the cardboard is cut under force, it is easy for the cardboard to deviate, resulting in poor cutting accuracy and low finished product quality. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a cardboard cutting device that is simple in structure, highly efficient in cutting, and ensures the quality of finished products.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a cardboard cutting device, comprising a cardboard conveying mechanism, a cutting mechanism, and a tension adjustment mechanism; the cardboard conveying mechanism includes a conveying roller and a conveyor belt that cooperates with the conveying roller to convey cardboard, the conveyor belt being positioned above the conveying roller; the tension adjustment mechanism includes a lifting tension wheel and a lifting drive component that drives the lifting tension wheel to move up and down, the lifting drive component being positioned on a mounting base, the conveyor belt passing over the lifting wheel; the cutting mechanism includes a cutting unit group and a rotating shaft that drives the cutting unit group to rotate, the cutting unit group being positioned on both sides of the conveyor belt, the cutting unit group including a longitudinal semi-circular blade, a first transverse flat blade that cooperates with the longitudinal semi-circular blade to cut the front corner of the cardboard, and a second transverse flat blade that cooperates with the longitudinal semi-circular blade to cut the rear corner of the cardboard, the first transverse flat blade and the second transverse flat blade being connected to the end point and the start point of the longitudinal semi-circular blade, respectively.

[0006] This invention utilizes a conveyor roller and conveyor belt to transport cardboard, reducing friction and damage. Adjusting the position of the lifting tension wheel regulates the conveyor belt tension, ensuring the cardboard material passes accurately and smoothly through the cutting mechanism, thus guaranteeing finished product quality. During shaft rotation, the longitudinal semi-circular blade, the first transverse flat blade, and the second transverse flat blade work together to cut the cardboard. The conveyor belt presses the cardboard against the conveyor roller, preventing paper tray misalignment and ensuring cutting accuracy. The rotating cutting unit simplifies the cutting process, has a simple structure, low cost, and allows for continuous operation of the cutting unit by rotating the shaft, improving production efficiency.

[0007] Preferably, the lifting tension wheel is rotatably mounted on the movable support. The lifting drive component includes an adjusting screw, which is fixedly connected to the movable support. The bottom of the adjusting screw is threadedly connected to the mounting base, which has a lifting channel for the movable support to move. Rotating the adjusting screw drives the lifting tension wheel on the mounting base to move up and down, adjusting the conveyor belt tension. The structure is simple.

[0008] Preferably, the lifting drive component includes a motor or a cylinder. It automatically adjusts the conveyor belt tension.

[0009] Preferably, the conveyor belt has two belts, each with its own tension adjustment mechanism. The mounting bases are respectively adjusted left and right on the crossbeam of the frame. The two conveyor belts ensure stable transport of the cardboard, and the distance between the belts can be adjusted to accommodate cardboard of different specifications.

[0010] Furthermore, the bottom of the crossbeam is toothed, and the mounting base has a rotatable drive gear that meshes with the crossbeam. One end of the drive gear has a handwheel for driving its rotation. The drive gear meshes with the crossbeam, and rotating the handwheel drives the mounting base to move left and right, thereby adjusting the position of the transmission belt. The structure is simple.

[0011] Furthermore, the mounting base is threaded with fastening screws, which pass through the mounting base and abut against the crossbeam to position the mounting base. By using the fastening screws on the mounting base to abut against the crossbeam, the mounting base is positioned, preventing displacement of the conveyor belt during operation and ensuring stable operation of the conveyor belt.

[0012] Additionally, the crossbeam has a lateral drive component, which is connected to the mounting base for automatic adjustment of the mounting base position.

[0013] The lateral drive component includes a belt drive with a power source, and the mounting base is mounted on the belt drive. The rotation of the belt drive drives the mounting base to move, automatically adjusting the position of the conveyor belt.

[0014] Preferably, the dicing unit assembly is detachably mounted on the cutter holder, which is sleeved on the rotating shaft. A dicing unit assembly of the appropriate size can be selected and mounted on the cutter holder according to requirements, facilitating easy replacement and adapting to different specifications of cardboard.

[0015] Preferably, the rotating shaft is connected to a servo motor, and a photoelectric sensor is located in front of the rotating shaft. The photoelectric sensor is connected to a controller, which controls the operation of the servo motor. After the photoelectric sensor detects the cardboard, it sends a signal to the controller, which then controls the servo motor to drive the rotating shaft to rotate, thereby controlling the cutting unit to cut lines on the cardboard. This results in high precision, improved yield, and energy savings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the tool holder and dicing unit assembly of this utility model.

[0018] Figure 3 This is an assembly diagram of the lifting tension wheel of this utility model.

[0019] Figure 4 This is a schematic diagram of the present invention.

[0020] Figure 5 This is a utility model Figure 4 A cross-sectional view along the AA direction.

[0021] The names of the body parts referred to by the numbers in the above attached diagrams are as follows: The components include: 1. Cardboard conveying mechanism; 11. Conveying roller; 12. Conveyor belt; 2. Tension adjustment mechanism; 21. Lifting drive component; 211. Adjusting screw; 22. Lifting tension wheel; 3. Cutting mechanism; 31. Rotating shaft; 32. Cutting unit group; 321. Longitudinal semi-circular blade; 322. First transverse flat blade; 323. Second transverse flat blade; 4. Mounting base; 5. Moving bracket; 6. Crossbeam; 7. Drive gear; 8. Handwheel; 9. Blade holder; 10. Photoelectric sensor; 101. Fastening screw. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0023] A cardboard cutting device includes a cardboard conveying mechanism 1, a cutting mechanism 3, and a tension adjusting mechanism 2. The cardboard conveying mechanism 1 includes a conveying roller 11 and a conveyor belt 12 that cooperates with the conveying roller to convey cardboard. The conveyor belt 12 is positioned above the conveying roller 11. The conveyor belt 12 and the conveying roller 11 cooperate to clamp and feed the cardboard, preventing the cardboard from shifting and reducing the friction of the cardboard. The tension adjustment mechanism 2 includes a lifting tension wheel 22 and a lifting drive component 21 that drives the lifting tension wheel 22 to move up and down. The lifting drive component 21 is mounted on the mounting base 4. The lifting tension wheel 22 is rotatably mounted on the movable support 5. The conveyor belt 12 passes through the lifting tension wheel 22. The frame has a driven roller and a driving roller, which are located on both sides of the conveyor drum 11. The conveyor belt 12 is wound around the driving roller, the driven roller, and the lifting tension wheel 22. The conveyor belt 12 is in close contact with a section of the outer periphery of the conveyor drum 11. The cardboard is conveyed in an arc-shaped path by the cooperation of the conveyor belt 12 and the conveyor drum 11. By adjusting the position of the lifting tension wheel 22, the tension of the conveyor belt 12 can be adjusted to adapt to cardboard of different specifications, ensuring accurate and stable conveying of cardboard materials and ensuring the quality of finished products. The cutting mechanism 3 includes a cutting unit group 32 and a rotating shaft 31 that drives the cutting unit group 32 to rotate. The cutting unit group 32 is arranged on both sides of the conveyor belt 12. The cutting unit group 32 includes a longitudinal semi-circular blade 321 that cooperates with the longitudinal semi-circular blade to cut the front corner of the cardboard and a second transverse flat blade 322 that cooperates with the longitudinal semi-circular blade to cut the rear corner of the cardboard. The first transverse flat blade 322 and the second transverse flat blade 323 are respectively connected to the end point and the starting point of the longitudinal semi-circular blade 321. The transverse semi-circular blade 321 is arranged circumferentially. The first transverse flat blade 322 and the second transverse flat blade 323 are arranged axially along the rotating shaft. The longitudinal semi-circular blade 321 is perpendicular to the first transverse flat blade 322 and the second transverse flat blade 323. The longitudinal semi-circular blade has a blade edge and a notch. The arc length of the blade edge of the longitudinal semi-circular blade 321 is adapted to the transverse cutting length of the cardboard. When the notch faces upward, the cutting unit group is U-shaped. During the cutting process, the power source drives the rotating shaft 31 to rotate. When the rear corner of the cardboard enters the cutting mechanism (side forward in the cardboard's travel direction), the longitudinal semi-circular blade cuts the cardboard longitudinally, and the first transverse flat blade cuts the cardboard transversely. When the rear corner of the cardboard enters the cutting mechanism, the longitudinal semi-circular blade cuts the cardboard longitudinally, and the second transverse flat blade cuts the cardboard transversely. The cardboard is cut at all four corners in a single feed, simplifying the cutting process, resulting in a simple structure and improved cutting efficiency.

[0024] There are several ways to drive the lifting tension wheel 22 to move up and down, thereby adjusting the tension of the conveyor belt 12. For example, the lifting drive component 21 includes an adjusting screw 211. The bottom of the adjusting screw is fixedly connected to the movable bracket 5, and the adjusting screw 211 is threadedly connected to the mounting base 4. The mounting base 4 has a lifting channel for the movable bracket 5 to move. The bottom of the adjusting screw 211 is connected to the movable bracket 5. By rotating the adjusting screw 211, the lifting tension wheel 22 on the movable bracket 5 is driven to move up and down. This structure is simple. Alternatively, the position of the lifting tension wheel 22 can be automatically adjusted. That is, the lifting drive component 21 includes a motor or a cylinder. The drive shaft of the lifting drive component 21 is connected to the movable bracket 5, driving the movable bracket 5 to move up and down, which is convenient for adjustment.

[0025] To improve the conveying speed and stability of the cardboard, the conveyor belt 12 has two belts, each with its own tension adjustment mechanism 2. Increasing the number of conveyor belts 12 increases the contact area between the conveyor belts 12 and the cardboard, thereby improving the conveying speed and stability of the cardboard. Furthermore, since a single conveyor belt 12 can easily cause the cardboard to curl upwards at both ends, two conveyor belts 12 can prevent the cardboard from deforming. To accommodate cardboard of different specifications, the mounting bases 4 are adjusted left and right on the crossbeams 6 of the frame. The two conveyor belts 12 are adjusted by moving their respective mounting bases 4 left and right, and by adjusting the positions of the drive belts on the drive roller and driven roller, thus adjusting the overall spacing to accommodate cardboard of different specifications.

[0026] There are several ways to adjust the mounting base 4 left and right. For example, the bottom of the crossbeam 6 is toothed, the mounting base 4 is sleeved on the crossbeam 6, and the mounting base 4 has a rotatable drive gear 7. The drive gear 7 is located in the inner cavity of the mounting base 4, and the drive wheel is located in the mounting base 4. The drive gear 7 meshes with the crossbeam 6, and one end of the drive gear 7 is equipped with a handwheel 8 to drive its rotation. The handwheel 8 is connected to the drive gear 7 by a coupling. By rotating the handwheel 8, the mounting base 4 is driven to move left and right on the crossbeam 6, making adjustment convenient. To ensure stable operation of the conveyor belt, a fastening screw 101 is threaded onto the mounting base 4. The fastening screw 101 passes through the mounting base 4 and abuts against the crossbeam 6 to achieve positioning of the mounting base. Specifically, when the mounting base 4 needs to be adjusted, the fastening screw is unscrewed, making it easy to rotate the handwheel 8 to move the mounting base 4 along the crossbeam 6 to adjust its position. After adjustment, the fastening screw is screwed in to abut against the crossbeam 6 to achieve positioning of the mounting base and ensure stable operation of the conveyor belt. Alternatively, the mounting base 4 can be automatically driven to move left and right using a power actuator such as a motor. For example, the crossbeam 6 has a lateral drive component, which is connected to the mounting base 4 in a transmission manner. The lateral drive component includes a belt drive with a power source. The mounting base 4 is mounted on the belt drive, and the belt drive drives the mounting base 4 to move left and right on the crossbeam 6. In order to ensure the stability of the mounting base 4 during the movement, a guide rail can be added to the crossbeam 6 so that the mounting base 4 slides on the guide rail.

[0027] To accommodate different cutting requirements and different specifications of cardboard, the cutting unit group 32 is detachably mounted on the knife holder 9. The knife holder 9 is sleeved on the rotating shaft 31. The longitudinal semi-circular knife 321, the first transverse flat knife 322, and the second transverse flat knife 323 are detachably mounted on the knife holder 9 by means of bolts or other means. The cutting unit group of the appropriate size can be selected and installed on the knife holder 9 according to the requirements to adapt to different specifications of cardboard and cutting requirements.

[0028] To save energy, improve cutting accuracy, and thus increase yield, the rotating shaft 31 is connected to a servo motor. A photoelectric sensor 10 is located in front of the rotating shaft 31 and is connected to a controller. The controller controls the operation of the servo motor. The photoelectric sensor 10 can accurately detect the position of the cardboard. The controller can control the servo motor to drive the rotation of the rotating shaft 31. The controller can be a motion controller or a PLC to achieve more precise control, ensuring that the cutting unit group 32 starts cutting at the correct position and time, thereby improving processing accuracy. The cutting unit group 32 starts working when the cardboard arrives, reducing energy waste and improving production efficiency.

[0029] The working principle of this utility model is described below with reference to the accompanying drawings: According to production needs, the transverse drive component drives the two sets of mounting seats 4 to move relative to each other, adjusting the distance between the two conveyor belts 12. Each lifting drive component 21 drives its respective lifting tension wheel 22 to move up and down, adjusting the tension of the conveyor belt 12 to ensure the stability of the cardboard conveying. The knife holder 9 with the corresponding specification cutting unit group 32 is installed on both sides of the conveyor belt 12.

[0030] The conveyor belt and conveyor rollers work together to transport the cardboard. After the photoelectric sensor 10 detects the cardboard, it sends a signal to the controller. The controller controls the servo motor to drive the rotating shaft to rotate the cutting unit group. When the rear corner of the cardboard enters the cutting mechanism (the side of the cardboard in the direction of travel), the longitudinal semi-circular blade 321 cuts the cardboard longitudinally, and the first transverse flat blade 322 cuts the cardboard transversely. When the rear corner of the cardboard enters the cutting mechanism, the longitudinal semi-circular blade 321 cuts the cardboard longitudinally, and the second transverse flat blade 323 cuts the cardboard transversely.

[0031] In the description of this invention, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. A paperboard slitting apparatus characterized by: Including The cardboard conveying mechanism (1) includes a conveyor roller (11) and a conveyor belt (12) that cooperates with the conveyor roller to convey cardboard, the conveyor belt (12) being disposed above the conveyor roller (11); The tension adjustment mechanism (2) includes a lifting tension wheel (22) and a lifting drive component (21) for driving the lifting tension wheel (22) to move up and down. The lifting drive component (21) is mounted on the mounting base (4), and the conveyor belt (12) passes through the lifting tension wheel (22). The cutting mechanism (3) includes a cutting unit group (32) and a rotating shaft (31) that drives the cutting unit group (32) to rotate. The cutting unit group (32) is arranged on both sides of the conveyor belt (12). The cutting unit group (32) includes a longitudinal semi-circular blade (321), a first transverse flat blade (322) that cooperates with the longitudinal semi-circular blade to cut the front corner of the cardboard, and a second transverse flat blade (323) that cooperates with the longitudinal semi-circular blade to cut the rear corner of the cardboard. The first transverse flat blade (322) and the second transverse flat blade (323) are respectively connected to the end point and the start point of the longitudinal semi-circular blade (321).

2. The paperboard slitting apparatus of claim 1, wherein: The lifting tension wheel (22) is rotatably mounted on the movable bracket (5). The lifting drive component (21) includes an adjusting screw (211). The bottom of the adjusting screw is fixedly connected to the movable bracket (5). The adjusting screw (211) is threadedly connected to the mounting base (4). The mounting base (4) has a lifting channel for the movable bracket (5) to move.

3. The paperboard slitting apparatus of claim 1, wherein: The lifting drive component (21) includes a motor or a cylinder.

4. The paperboard slitting apparatus of claim 1, wherein: The conveyor belt (12) has two belts, each with its own tension adjustment mechanism (2), and the mounting base (4) is adjusted left and right on the crossbeam (6) of the frame.

5. The paperboard slitting apparatus of claim 4, wherein: The bottom of the crossbeam (6) is toothed, and the mounting base (4) has a rotatable drive gear (7). The drive gear (7) meshes with the crossbeam (6), and one end of the drive gear (7) is provided with a handwheel (8) to drive its rotation.

6. The paperboard slitting apparatus of claim 5, wherein: The mounting base (4) is threaded with a fastening screw (101), which passes through the mounting base (4) and abuts against the crossbeam (6) to achieve the positioning of the mounting base.

7. The paperboard slitting apparatus of claim 4, wherein: The crossbeam (6) has a transverse drive component, which is connected to the mounting base (4) in a transmission manner.

8. The paperboard slitting apparatus of claim 7, wherein: The lateral drive component includes a belt drive with a power source, and the mounting base (4) is disposed on the belt drive.

9. The paperboard slitting apparatus of claim 1, wherein: The cutting unit group (32) is detachably mounted on the tool holder (9), which is sleeved on the rotating shaft (31).

10. The paperboard slitting apparatus of claim 1, wherein: The rotating shaft (31) is connected to the servo motor for transmission. A photoelectric sensor (10) is provided in front of the rotating shaft (31). The photoelectric sensor (10) is connected to the controller, and the controller controls the operation of the servo motor.

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