Corrugated board slotting and creasing apparatus

Abstract

The present application relates to corrugated board slotting and creasing equipment, and to the technical field of paper slotting, comprising a rack and a plurality of slotting systems, a plurality of creasing systems, a slotting feeding system and a slotting system arranged in sequence, the creasing systems and the slotting systems are all installed on the rack, the slotting system comprises a slotting reference frame, a slotting pushing plate, a tension pushing device, a swing slotting device and a vibration generating device, the slotting pushing plate is installed on the slotting reference frame and the slotting pushing plate is in an arc shape protruding towards the tension pushing device, the tension pushing device is installed on the slotting reference frame and is attached to the slotting pushing plate, the swing slotting device is swingably installed on the slotting reference frame, the swing slotting device has a plurality of pairs of adjacent cutting edges, the cutting edges press the slotting pushing plate or are separated from the slotting pushing plate when the swing slotting device swings, and the vibration generating device is installed on the swing slotting device, thereby reducing the equipment cost while ensuring the processing quality and efficiency.

Description

Technical Field

[0001] This invention relates to the field of paper slotting technology, and in particular to a slotting and creasing device for corrugated cardboard. Background Technology

[0002] In the corrugated cardboard processing industry, slotting and crease finishing are key processes affecting the quality of carton forming. Currently, long slot processing mainly uses fixed stamping or continuous cutting with rotating rollers. Stamping has a large impact force, which easily leads to burrs, tearing, and delamination at the slot edges. Moreover, it is an intermittent operation, resulting in low efficiency and poor splicing accuracy.

[0003] To avoid tool interference, rotary cutting methods require increasing the roller diameter along with the groove length, resulting in bulky equipment and significantly increased manufacturing and dynamic balancing costs. Furthermore, existing creasing and grooving systems mostly employ fixed roller spacing structures, making it difficult to flexibly adjust to different cardboard thicknesses, thus affecting the crease formation effect.

[0004] In addition, the lack of effective clamping and guiding during the feeding process of the cardboard makes it prone to deviation and slippage during high-speed conveying, affecting the slotting positioning accuracy; and the high resistance between the cutting edge and the cardboard fibers exacerbates tool wear and makes the slotting quality unstable.

[0005] To address the aforementioned issues, there is an urgent need to develop a corrugated cardboard slotting and creasing equipment that can achieve continuous long-groove processing with small-diameter cutters, adjustable units, stable material feeding, and low cutting resistance, in order to improve processing quality and production efficiency and meet diverse production needs. Summary of the Invention

[0006] To overcome the technical defects of existing technologies, this invention provides a corrugated cardboard slotting and creasing device, which reduces equipment costs while ensuring processing quality and efficiency.

[0007] The technical solution adopted in this invention is: A corrugated cardboard slotting and creasing machine includes a frame and a series of creasing systems, slotting systems, a slotting feeding system, and a slotting system arranged sequentially. The creasing and slotting systems are all mounted on the frame. Each slotting system includes a slotting reference frame, a slotting pushing plate, a tensioning pushing device, a swinging slotting device, and a vibration generating device. The slotting pushing plate is mounted on the slotting reference frame and is arc-shaped, protruding towards the tensioning pushing device. The tensioning pushing device is mounted on the slotting reference frame and fits against the slotting pushing plate. The swinging slotting device is oscillatingly mounted on the slotting reference frame and has several pairs of adjacent cutting edges. When the swinging slotting device oscillates, the cutting edges press against or disengage from the slotting pushing plate. The vibration generating device is installed... On the swing grooving device, the grooving push plate is provided with a striking device on the side away from the swing grooving device. The grooving push plate is provided with a cardboard pressing hole. The striking device includes a striking motor, a striking connecting rod, a striking swing rod, a striking avoidance spring, and two limiting blocks. The striking connecting rod and the striking swing rod are hinged to each other. The striking connecting rod is installed on the output end of the striking motor. The two limiting blocks are respectively installed on the lower side of the striking connecting rod and the striking swing rod. The two ends of the striking avoidance spring are respectively installed on the upper side of the striking connecting rod and the striking swing rod. The two limiting blocks abut against each other. The side of the striking swing rod away from the striking connecting rod is provided with a striking inclined surface. When striking, the striking inclined surface passes downward through the cardboard pressing hole. The side of the striking inclined surface closer to the swing grooving device is lower than the side of the striking inclined surface away from the swing grooving device.

[0008] Preferably, each of the grooving systems includes an upper cutting roller, an upper grooving adjusting slider, and a lower anvil roller. The upper grooving adjusting slider is slidably mounted on the frame in the lifting direction. The upper cutting roller is rotatably mounted on the upper grooving adjusting slider. The lower anvil roller is rotatably mounted on the frame. The upper cutting roller is provided with a grooving protrusion. The upper cutting roller and the lower anvil roller are adapted to fit together.

[0009] Preferably, the indentation system includes an upper indentation roller, an upper indentation adjustment slider, and a lower indentation roller. The upper indentation adjustment slider is slidably mounted on the frame in the lifting direction. The upper indentation roller is rotatably mounted on the upper indentation adjustment slider, and the lower indentation roller is rotatably mounted on the frame. The upper and lower indentation rollers are adapted to fit together.

[0010] Preferably, the slotting feeding system includes a feeding base plate, a feeding conveyor belt, and a feeding pressing device. The feeding pressing device is mounted on a frame, and a plurality of guide rollers are provided at the bottom of the feeding pressing device. The feeding conveyor belt slides on the upper surface of the feeding base plate, the feeding base plate supports the feeding conveyor belt, and the feeding pressing device presses downwards onto the feeding conveyor belt.

[0011] Preferably, one end of the feeding and pressing device is oscillatingly mounted on the frame via a swing reference axis, and the other end of the feeding and pressing device is pressed against the feeding conveyor belt by a compression spring.

[0012] Preferably, the tensioning pushing device includes three tensioning pushing rollers, each of which is rotatably mounted on the grooving reference frame. Several grooving conveyor belts are wound around the outer periphery of each tensioning pushing roller, and each of the grooving conveyor belts presses down on the grooving pushing plate for sliding.

[0013] Preferably, the oscillating grooving device includes a grooving oscillating roller and a plurality of grooving cutters, the grooving cutters being mounted on the grooving oscillating roller, the grooving oscillating roller being rotatably mounted on a grooving reference frame, and the cutting edge being located on the grooving cutter.

[0014] Preferably, the vibration generating device is mounted on the grooving cutter.

[0015] The beneficial effects of this invention are: The grooving system uses a swing grooving device to replace the traditional large-diameter rotating roller. The grooving swing roller drives the cutting edge to swing back and forth, enabling continuous processing of long grooves with small-diameter tools. This significantly reduces the size of the equipment, manufacturing difficulty and cost, while meeting the needs of high-speed continuous production.

[0016] By applying high-frequency micro-amplitude vibration to the cutting edge through a vibration generator, the frictional resistance during the cutting process is significantly reduced, burrs and cardboard delamination are reduced, the groove quality is improved, and the tool life is extended.

[0017] The slotted push plate adopts an arc-shaped structure design, which allows the cut-out scrap material to pop out naturally under the guidance of the arc surface, effectively preventing waste material from accumulating and clogging, and ensuring the stable operation of the equipment for a long time.

[0018] The striking device applies an instantaneous impact to the part of the cardboard to be processed before cutting, forming a pre-fracture zone, providing a stress concentration point for the main cutting edge, and further reducing the cutting resistance; at the same time, the striking avoidance spring allows the striking swing arm to be passively deflected with the movement of the cardboard, avoiding rigid collisions, which protects the cardboard and reduces the impact noise of the equipment.

[0019] The slotting and feeding system uses a feeding and pressing device in conjunction with a feeding conveyor belt to clamp the cardboard. One end of the feeding and pressing device is elastically pressed by a compression spring, which can adapt to the fluctuation of cardboard thickness and effectively prevent deviation and slippage during high-speed conveying, thus ensuring the accuracy of slotting positioning. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention.

[0021] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0022] Figure 3 for Figure 1 Enlarged diagram of point B in the middle.

[0023] Figure 4 for Figure 1 Enlarged diagram of point C in the middle.

[0024] Figure 5 for Figure 1 Enlarged diagram of point D in the middle.

[0025] Figure 6 This is a schematic diagram of the slotting system structure.

[0026] Figure 7 This is a schematic diagram of the grooving tool structure.

[0027] Figure 8 This is a cross-sectional schematic diagram of the swing grooving device.

[0028] Figure 9 for Figure 8 A magnified diagram of point E when the inclined plane is being struck.

[0029] Figure 10 for Figure 8 Enlarged diagram of point E after being struck on the inclined plane.

[0030] Figure 11 This is a schematic diagram of the location of the long groove.

[0031] Explanation of reference numerals in the attached figures: 1. Rack; 2. Grooving system; 21. Upper cutter roller; 211. Grooving protrusion; 22. Upper grooving adjusting slider; 23. Lower anvil roller; 3. Indentation system; 31. Upper indentation roller; 311. Indentation protrusion; 32. Upper indentation adjustment slider; 33. Lower indentation roller; 4. Slotted feeding system; 41. Feeding base plate; 44. Feeding conveyor belt; 43. Feeding pressing device; 431. Compression spring; 433. Swing reference axis; 5. Slotting system; 51. Slotting reference frame; 52. Slotting push plate; 521. Cardboard pressing hole; 53. Tensioning push device; 531. Tensioning push roller; 532. Slotting conveyor belt; 55. Swinging slotting device; 551. Slotting swing roller; 552. Slotting knife; 57. Striking device; 571. Striking motor; 572. Striking connecting rod; 573. Striking swing rod; 575. Striking avoidance spring; 576. Limiting block; 5731. Striking ramp; 6. Long groove. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings: like Figure 1— Figure 11 As shown, this embodiment provides a corrugated cardboard slotting and creasing device, including a frame 1 and a plurality of creasing systems 3, a plurality of slotting systems 2, a slotting feeding system 4, and a slotting system 5 arranged in sequence. The slotting system 2 is used to press short slots, where short slots are relative to the long slots 6 opened by the slotting system 5. In this embodiment, slots less than 5 cm are defined as short slots, and slots more than 5 cm are defined as long slots 6. The slotting system 2 is used to press creases. The creasing system 3 and each slotting system 2 are all installed on the frame 1. The slotting system 5 includes a slotting reference frame 51, a slotting pushing plate 52, a tensioning pushing device 53, a swinging slotting device 55, and a vibration generating device. The slotting pushing plate 52 is installed on the slotting reference frame 51 and the slotting pushing plate 52 is arc-shaped and protrudes towards the tensioning pushing device 53. The protrusion towards the tensioning pushing device 53 makes the cardboard tend to detach from the slotting pushing plate 52 after slotting, which facilitates the discharge of the cut-off material.

[0033] The tensioning pusher 53 is mounted on the slotting reference frame 51 and fits against the slotting pusher plate 52. The swinging slotting device 55 is swinging on the slotting reference frame 51, thereby switching between cutting and non-cutting states and controlling the cutting position and slot length on the cardboard. The swinging slotting device 55 has several pairs of adjacent cutting edges. The tensioning pusher 53 and the slotting pusher plate 52 clamp the cardboard for conveying, ensuring that the cardboard is always positioned during the conveying process and that the cardboard has sufficient force to squeeze against the cutting edges. When the swinging slotting device 55 swings, the cutting edges press against or disengage from the slotting pusher plate 52 to achieve continuous slotting of the long slot 6. The vibration generator is mounted on the swinging slotting device 55 to reduce the cutting resistance during cutting and the running resistance of the cardboard, achieving low-resistance continuous slotting of the long slot 6. This avoids the use of large-diameter rollers for extrusion cutting, reduces equipment costs, and ensures processing quality and efficiency.

[0034] The slotting push plate 52 is equipped with a striking device 57 on the side away from the swinging slotting device 55. The slotting push plate 52 is provided with a cardboard pressing hole 521. The striking device 57 includes a striking motor 571, a striking connecting rod 572, a striking swinging rod 573, a striking relief spring 575, and two limiting blocks 576. The striking connecting rod 572 and the striking swinging rod 573 are hinged to each other. The striking connecting rod 572 is installed at the output end of the striking motor 571. The two limiting blocks 576 are respectively installed on the lower side of the striking link 572 and the striking swing rod 573, and the two ends of the striking avoidance spring 575 are respectively installed on the upper side of the striking link 572 and the striking swing rod 573. Under the pushing of the striking avoidance spring 575, the two limiting blocks 576 abut against each other, so that when striking, the striking link 572 and the striking swing rod 573 move synchronously under the drive of the striking motor 571.

[0035] A striking ramp 5731 is provided on the side of the striking swing rod 573 away from the striking link 572. During striking, the striking ramp 5731 passes downward through the cardboard pressing hole 521. The side of the striking ramp 5731 closer to the swing slotting device 55 is lower than the side away from the swing slotting device 55. During cardboard conveying, the moving cardboard presses upward against the striking ramp 5731 of the striking swing rod 573. The striking swing rod 573 overcomes the preload of the striking avoidance spring 575 and swings upward. At this time, the two limiting blocks 576 move away from each other. Because the striking ramp 5731 passes through the cardboard pressing hole 521... The pressure hole 521 strikes the corrugated cardboard towards the cutting edge of the downward swinging slotting device 55. Since the impact avoidance spring 575 is compressed and retracted, the impact motor 571 does not need to rotate immediately, thus avoiding the influence of the inertia of the impact swinging rod 573 of the impact linkage 572 on the impact motor 571. The impact motor 571 can rotate before the next cardboard is fed in. Under the impact of the impact inclined plane 5731, the corrugated cardboard is partially broken. When the cut surface of the broken corrugated cardboard is fed into the cutting edge of the swinging slotting device 55, the cutting resistance between the swinging slotting device 55 and the cardboard can be reduced, ensuring smooth cutting.

[0036] Specifically, the striking motor 571 is a servo motor or a stepper motor, and its start is triggered by a cardboard arrival detection sensor (such as a photoelectric sensor) located between the slotting feeding system 4 and the slotting system 5. When the sensor detects that the front end of the cardboard has reached the predetermined striking position, a commercially available PLC controller sends a start signal to the striking motor 571. The striking motor 571 drives the striking linkage 572 to rotate forward, causing the striking inclined surface 5731 of the striking swing arm 573 to pass through the cardboard pressing hole 521 and strike the cardboard.

[0037] After the strike is completed, the striking swing arm 573 is pushed upward by the cardboard as it continues to be conveyed forward, overcoming the preload of the striking avoidance spring 575. The two limiting blocks 576 separate from each other, and the striking swing arm 573 swings relative to the striking connecting rod 572 to avoid the impact, causing the striking inclined surface 5731 to tilt upward within the cardboard pressing hole 521. The striking motor 571 then rotates in the opposite direction to reset. Under the elastic force of the striking avoidance spring 575, the two limiting blocks 576 abut against each other again, and the striking connecting rod 572 and the striking swing arm 573 return to their initial state of synchronous movement, awaiting the next striking command.

[0038] Before the striking motor 571 reverses and resets, the striking swing arm 573 has achieved independent avoidance deflection relative to the striking link 572 through the compression of the striking avoidance spring 575. The cardboard can continue to pass smoothly without obstruction, so the striking motor 571 does not need to reverse immediately at the moment of striking, avoiding frequent start-stop and reverse impact of the motor, reducing control difficulty and equipment noise.

[0039] Specifically, each grooving system 2 includes an upper cutting roller 21, an upper grooving adjusting slider 22, and a lower anvil roller 23. The upper grooving adjusting slider 22 is slidably mounted on the frame 1 by a screw in the lifting direction. The upper cutting roller 21 is rotatably mounted on the upper grooving adjusting slider 22, and the lower anvil roller 23 is rotatably mounted on the frame 1. The upper cutting roller 21 is provided with a grooving protrusion 211. The upper cutting roller 21 and the lower anvil roller 23 are fitted together, and the fit between the upper cutting roller 21 and the lower anvil roller 23 realizes grooving.

[0040] Specifically, the creasing system 3 includes an upper creasing roller 31, an upper creasing adjustment slider 32, and a lower creasing roller 33. The upper creasing adjustment slider 32 is slidably mounted on the frame 1 by a screw in the lifting direction. The upper creasing roller 31 is rotatably mounted on the upper creasing adjustment slider 32, and the lower creasing roller 33 is rotatably mounted on the frame 1. The upper creasing roller 31 is provided with creasing protrusions 311. The upper creasing roller 31 and the lower creasing roller 33 are fitted together to achieve creasing of the paperboard.

[0041] Specifically, the slotting and feeding system 4 includes a feeding base plate 41, a feeding conveyor belt 44, and a feeding pressing device 43. The feeding pressing device 43 is mounted on the frame 1. The bottom of the feeding pressing device 43 is provided with several guide rollers. The feeding conveyor belt 44 slides on the upper surface of the feeding base plate 41. The feeding base plate 41 supports the feeding conveyor belt 44. The feeding pressing device 43 presses down on the feeding conveyor belt 44. The cardboard is fed between the feeding conveyor belt 44 and the guide rollers at the bottom of the feeding pressing device 43, thereby achieving stable feeding of the cardboard.

[0042] Specifically, one end of the feeding and pressing device 43 is oscillatingly mounted on the frame 1 via the swing reference shaft 433, and the other end of the feeding and pressing device 43 is pressed against the feeding conveyor belt 44 via the compression spring 431, thereby reducing the cost of controlling the lifting and lowering of the feeding and pressing device 43.

[0043] Specifically, the tensioning pusher device 53 includes three tensioning pusher rollers 531, each tensioning pusher roller 531 is rotatably mounted on the slotting reference frame 51, and several slotting conveyor belts 532 are wound around the outer periphery of each tensioning pusher roller 531. Each slotting conveyor belt 532 presses against the slotting pusher plate 52 and slides. The cardboard passes between the slotting conveyor belt 532 and the slotting pusher plate 52. The slotting conveyor belt 532 and the slotting pusher plate 52 constrain the cardboard and ensure that the cardboard moves forward smoothly.

[0044] Specifically, the oscillating grooving device 55 includes a grooving oscillating roller 551 and a plurality of grooving blades 552. The grooving blades 552 are mounted on the grooving oscillating roller 551, which is rotatably mounted on the grooving reference frame 51. The grooving oscillating roller 551 is driven to rotate by a motor, so that each grooving blade 552 is close to or away from the cardboard, and the cutting edge is located on the grooving blade 552, which performs cutting.

[0045] Specifically, the vibration generating device is a vibration motor, which is mounted on the grooving cutter 552 to reduce cutting resistance and grooving resistance.

[0046] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A corrugated cardboard slotting and creasing machine, characterized in that, The system includes a frame and a series of indentation systems, grooving systems, grooving feeding systems, and grooving systems arranged sequentially. The indentation and grooving systems are all mounted on the frame. Each grooving system includes a grooving reference frame, a grooving pushing plate, a tensioning pushing device, a swinging grooving device, and a vibration generating device. The grooving pushing plate is mounted on the grooving reference frame and is arc-shaped, protruding towards the tensioning pushing device. The tensioning pushing device is mounted on the grooving reference frame and fits against the grooving pushing plate. The swinging grooving device is oscillatingly mounted on the grooving reference frame and has several pairs of adjacent cutting edges. When the swinging grooving device swings, the cutting edges press against or disengage from the grooving pushing plate. The vibration generating device is mounted on the swinging grooving device. On the slotting device, the slotting push plate is provided with a striking device on the side away from the swinging slotting device. The slotting push plate is provided with a cardboard pressing hole. The striking device includes a striking motor, a striking connecting rod, a striking swing rod, a striking avoidance spring, and two limiting blocks. The striking connecting rod and the striking swing rod are hinged to each other. The striking connecting rod is installed on the output end of the striking motor. The two limiting blocks are respectively installed on the lower side of the striking connecting rod and the striking swing rod. The two ends of the striking avoidance spring are respectively installed on the upper side of the striking connecting rod and the striking swing rod. The two limiting blocks abut against each other. The side of the striking swing rod away from the striking connecting rod is provided with a striking ramp. The striking ramp passes downward through the cardboard pressing hole. The side of the striking ramp closer to the swinging slotting device is lower than the side of the striking ramp away from the swinging slotting device.

2. The corrugated cardboard slotting and creasing equipment according to claim 1, characterized in that, Each of the aforementioned grooving systems includes an upper cutting roller, an upper grooving adjusting slider, and a lower anvil roller. The upper grooving adjusting slider is slidably mounted on the frame in the lifting direction. The upper cutting roller is rotatably mounted on the upper grooving adjusting slider. The lower anvil roller is rotatably mounted on the frame. The upper cutting roller is provided with a grooving protrusion. The upper cutting roller and the lower anvil roller are adapted to fit together.

3. The corrugated cardboard slotting and creasing equipment according to claim 1, characterized in that, The indentation system includes an upper indentation roller, an upper indentation adjustment slider, and a lower indentation roller. The upper indentation adjustment slider is slidably mounted on the frame in the lifting direction. The upper indentation roller is rotatably mounted on the upper indentation adjustment slider. The lower indentation roller is rotatably mounted on the frame. The upper indentation roller is provided with indentation protrusions. The upper indentation roller and the lower indentation roller are adapted to fit together.

4. The corrugated cardboard slotting and creasing equipment according to claim 1, characterized in that, The slotting feeding system includes a feeding base plate, a feeding conveyor belt, and a feeding pressing device. The feeding pressing device is mounted on a frame and has several guide rollers at its bottom. The feeding conveyor belt slides on the upper surface of the feeding base plate, the feeding base plate supports the feeding conveyor belt, and the feeding pressing device presses downwards onto the feeding conveyor belt.

5. The corrugated cardboard slotting and creasing equipment according to claim 4, characterized in that, One end of the feeding and pressing device is oscillatingly mounted on the frame via a swing reference shaft, and the other end of the feeding and pressing device is pressed against the feeding conveyor belt by a compression spring.

6. The corrugated cardboard slotting and creasing equipment according to claim 1, characterized in that, The tensioning pushing device includes three tensioning pushing rollers, each of which is rotatably mounted on the grooving reference frame. Several grooving conveyor belts are wound around the outer periphery of each tensioning pushing roller, and each grooving conveyor belt presses down on the grooving pushing plate for sliding.

7. The corrugated cardboard slotting and creasing equipment according to claim 1, characterized in that, The swing grooving device includes a grooving swing roller and a plurality of grooving cutters. The grooving cutters are mounted on the grooving swing roller, and the grooving swing roller is rotatably mounted on a grooving reference frame. The cutting edge is located on the grooving cutter.

8. The corrugated cardboard slotting and creasing equipment according to claim 7, characterized in that, The vibration generating device is mounted on the grooving tool.

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