Corrugated board crease line pressing device

Abstract

The invention relates to the technical field of corrugated case printing grooving machines, in particular to a corrugated board crease line pressing device which comprises upper line pressing mechanisms and lower line pressing mechanisms which are used for conducting line pressing on the upper surface and the lower surface of a paperboard, and the number and the position of the upper line pressing mechanisms correspond to the number and the position of the lower line pressing mechanisms in a one-to-one mode. The upper line pressing mechanism comprises an upper linkage plate, upper line pressing wheel sets installed on one side of the upper linkage plate and arranged at equal intervals in the width direction of the upper linkage plate, and upper line pressing synchronous belts connected to the upper line pressing wheel sets in a wrapping mode, an adjusting mechanism used for adjusting line pressing gaps is arranged between the upper linkage plate and the upper line pressing wheel sets, and the adjusting mechanism is movably connected with the upper line pressing wheel sets. The mode that the upper line pressing synchronous belt and the lower line pressing synchronous belt work cooperatively is adopted, so that it is guaranteed that the indentation position is centered, and the problems of deviation and damage in the paperboard conveying process can be solved; and the gap between the upper line pressing mechanism and the lower line pressing mechanism is adjusted through the adjusting mechanism, the application range of the line pressing device is further widened, and therefore the carton forming precision and the production efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of corrugated paper box printing and slotting machines, in particular to a corrugated paper board crease line pressing device. Background Art

[0002] Printing slotting machine, also known as water-based printing slotting machine, carton printing slotting machine, ink printing slotting machine or corrugated cardboard printing slotting machine, is a comprehensive carton processing equipment that integrates the five processes of printing, slotting, corner cutting, creasing and edge trimming of corrugated cardboard; and the creasing device is an important component of the corrugated cardboard printing slotting machine. The corrugated cardboard is pressed out with a score line by the creasing device, and the corrugated cardboard is folded into shape according to this score line. Therefore, the creasing of the corrugated cardboard is a key process in the formation of corrugated boxes.

[0003] At present, the existing patent with announcement number CN113232363A discloses a creasing device for a corrugated cardboard printing and slotting machine. The creasing device mainly realizes the crease of the cardboard by means of upper and lower creasing mechanisms. In the process of extruding the cardboard, the device uses the creasing convex discs and the clearance grooves provided on the surfaces of the upper and lower creasing wheels to cooperate with each other to complete the creasing operation of the corrugated cardboard. However, this technology has obvious defects: (1) Problem of indentation position deviation: The contact between the indentation wheel and the cardboard is rigid point-to-line contact. During high-speed transportation, the indentation may deviate from the preset position due to a slight deviation of the cardboard, affecting the subsequent folding accuracy.

[0004] (2) Risk of cardboard damage: The edge of the creasing wheel is sharp, which can easily cause fiber tearing when applying pressure to low-weight or high-humidity cardboard. The breakage rate will increase significantly, especially when the indentation depth is not adjusted properly.

[0005] (3) Limited scope of application: Cardboards of different thicknesses are limited by the gap between the upper and lower pressing wheels when pressing lines. Frequent stops are required to adjust the gap between the upper and lower pressing wheels to meet different crease requirements, resulting in low production efficiency. Summary of the Invention

[0006] In order to solve the technical defects raised in the above-mentioned background technology, the purpose of the present invention is to provide a corrugated cardboard crease pressing device, which aims to solve the problems of the existing technology such as the pressing position of the pressing wheel is not centered, the cardboard is damaged and the scope of application is small, and by adopting the upper and lower pressing synchronous belts to work in a collaborative mode, it can adapt to the changes in cardboard thickness and achieve continuous and stable pressing.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A corrugated cardboard crease pressing device comprises an upper pressing mechanism and a lower pressing mechanism for pressing the upper and lower surfaces of the cardboard, wherein the number and position of the upper pressing mechanism and the lower pressing mechanism correspond one to one; The upper wire pressing mechanism includes an upper linkage plate, an upper wire pressing wheel group installed on one side of the upper linkage plate and arranged equidistantly along the width direction of the upper wire pressing wheel group, and an upper wire pressing synchronous belt covered and connected to the upper wire pressing wheel group, an adjustment mechanism for adjusting the wire pressing gap is provided between the upper linkage plate and the upper wire pressing wheel group, and the adjustment mechanism is movably connected to the upper wire pressing wheel group; the outer side of the upper wire pressing wheel group is a gear structure; the inner surface of the upper wire pressing synchronous belt is provided with a tooth groove meshing with the gear structure, and the outer surface of the upper wire pressing synchronous belt is provided with a wire pressing groove near the middle position, and the vertical cross-section of the wire pressing groove is a semicircular arc structure; The lower wire pressing mechanism includes a lower linkage plate, a lower wire pressing wheel group installed on one side of the lower linkage plate and arranged equidistantly along the width direction of the lower linkage plate, and a lower wire pressing synchronous belt wrapped around the lower wire pressing wheel group. A lower linkage plate driving assembly is provided at the bottom end of the lower linkage plate corresponding to the position of the lower wire pressing wheel group; the outer side of the lower wire pressing wheel group is a gear structure; the inner surface of the lower wire pressing synchronous belt is provided with a tooth groove meshing with the gear structure, and the outer surface of the lower wire pressing synchronous belt is provided with a wire pressing protrusion adapted to the wire pressing groove near the middle position, the middle part of the wire pressing protrusion is a convex arc profile and transitions to a plane structure on both sides; The gap between the upper pressing mechanism and the lower pressing mechanism is adjusted by the adjusting mechanism so that the pressing protrusion and the pressing groove act on a specific position of the paperboard to form a fold.

[0008] Preferably, the adjustment mechanism includes a guide assembly, a lifting transmission assembly and a drive assembly, the guide assembly includes a guide block with a guide rail on one side and a guide plate connected to the guide block, one side of the guide block is fixedly connected to the upper linkage plate, and the other side is slidingly connected to the guide plate through the guide rail; the lifting transmission assembly includes a transmission screw and a nut seat, and the nut seat is fixed to the guide plate; one end of the transmission screw is threadedly engaged with the nut seat, and the other end is transmission-connected to the drive assembly; the drive assembly includes a mounting seat, a servo motor and a coupling, the mounting seat is fixedly connected to the upper linkage plate, and one side of the mounting seat is connected to the coupling; the coupling is rotatably connected to the output end of the servo motor and is linkage-connected to the transmission screw.

[0009] Preferably, the upper press line wheel group includes an upper press line rotating wheel, an upper press line front wheel, an upper press line rear wheel and an upper press line driven wheel, the upper press line rotating wheel is installed on the upper linkage plate, and the upper press line rotating wheel is keyed to an upper drive shaft, and the upper drive shaft is driven by the driving device of the corrugated cardboard printing and slotting machine to rotate synchronously; the upper press line driven wheel is provided with multiple, multiple upper press line driven wheels are arranged side by side, and the upper press line driven wheel is located below the upper press line rotating wheel; the upper press line front wheel and the upper press line rear wheel are respectively located on the left and right sides of the upper press line driven wheel, and the upper press line front wheel, the upper press line rear wheel and the upper press line driven wheel are installed on the guide plate and rotate synchronously through the upper press line synchronous belt.

[0010] Preferably, an upper wire pressing support wheel is provided between the upper wire pressing rotating wheel and the upper wire pressing driven wheel, the upper wire pressing support wheel is installed on the guide plate, and the upper wire pressing support wheel is respectively covered with a transmission belt on the outer side surface of the upper wire pressing rotating wheel and the upper wire pressing rear wheel.

[0011] Preferably, a tensioning synchronous wheel for adjusting the tension of the transmission belt is provided between the upper wire pressing support wheel and the upper wire pressing rotating wheel.

[0012] Preferably, the lower pressing wheel group includes a lower pressing rotating wheel, a lower pressing front wheel, a lower pressing rear wheel and a lower pressing driven wheel, the lower pressing rotating wheel is keyed to a lower drive shaft, and the lower drive shaft is driven by the driving device of the corrugated cardboard printing and slotting machine to rotate synchronously; a plurality of lower pressing driven wheels are provided, and a plurality of lower pressing driven wheels are arranged side by side above the lower pressing rotating wheel; the lower pressing front wheel and the lower pressing rear wheel are respectively located on both sides of the lower pressing driven wheel; the lower pressing rotating wheel, the lower pressing front wheel, the lower pressing rear wheel and the lower pressing driven wheel are rotated synchronously by a lower pressing synchronous belt.

[0013] Preferably, a tensioning block is provided between the lower pressure line front wheel and the lower pressure line driven wheel on the adjacent side, one end of the tensioning block is fixedly connected to the lower linkage plate, and the top end of the tensioning block receives the lower pressure line synchronous belt.

[0014] Preferably, the upper linkage plate is located on both sides of the upper pressing wheel group and is provided with an upper cutter disc assembly for grooving the cardboard, and a double screw transmission assembly is connected to the top of the upper cutter disc assembly.

[0015] Preferably, the lower linkage plate is located on both sides of the lower pressing wheel group and is provided with a lower cutter disc assembly for grooving the cardboard. The lower cutter disc assembly corresponds to the position of the upper cutter disc assembly, and a paper shoveling assembly is connected below the lower cutter disc assembly.

[0016] Preferably, a pre-pressing line assembly is further provided at the position corresponding to the upper cutter disc assembly and the lower cutter disc assembly on one side of the upper linkage plate and the lower linkage plate, and the pre-pressing line assembly includes an upper pre-pressing line wheel, a lower pre-pressing line wheel and a pre-pressing line wheel driving shaft, and the upper pre-pressing line wheel and the lower pre-pressing line wheel are both key-connected with the pre-pressing line wheel driving shaft, and a fork mechanism is connected between the upper pre-pressing line wheel and the lower pre-pressing line wheel and the upper linkage plate and the lower linkage plate; the pre-pressing line wheel driving shaft is driven by the driving device of the corrugated cardboard printing and slotting machine to rotate synchronously.

[0017] In summary, the beneficial effects of the present invention are: The present invention adopts the collaborative operation mode of upper and lower pressing synchronous belts, utilizes the pressing groove of the upper pressing synchronous belt and the pressing protrusion of the lower pressing synchronous belt to form a continuous flexible pressing area, and disperses the pressing stress through the arc profile, thereby reducing the risk of cardboard fiber breakage compared with traditional pressing wheels, and is particularly suitable for low-weight or high-humidity cardboard; at the same time, compared with the traditional method of rolling with pressing wheels, the method of meshing the upper and lower pressing synchronous belts with the upper and lower pressing wheel groups can not only ensure that the indentation position is centered, but also eliminate the problem of cardboard deviation and damage during high-speed transportation; in addition, the adjustment mechanism is used to adjust the gap between the upper and lower pressing mechanisms according to the different thicknesses of cardboards, further improving the applicability of the corrugated cardboard crease pressing device, thereby greatly improving the forming accuracy and production efficiency of the carton. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the crease line pressing device for corrugated cardboard of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the corrugated cardboard crease pressing device of the present invention; Figure 3 yes Figure 2 A magnified view of the structure at a in the middle; Figure 4 It is a structural schematic diagram of the upper thread pressing mechanism in the present invention; Figure 5 It is a front view of the upper thread pressing mechanism of the present invention; Figure 6 It is a structural schematic diagram of the lower thread pressing mechanism in the present invention; Figure 7 It is a front view of the lower thread pressing mechanism in the present invention.

[0019] Description of Reference Numerals 1. Upper crimping mechanism; 11. Upper linkage plate; 12. Upper crimping wheel assembly; 121. Upper crimping rotating wheel; 122. Upper crimping front wheel; 123. Upper crimping rear wheel; 124. Upper crimping driven wheel; 125. Upper drive shaft; 126. Upper crimping support wheel; 127. Drive belt; 128. Tensioning synchronous wheel; 13. Upper crimping synchronous belt; 131. crimping groove; 2. Lower crimping mechanism; 21. Lower linkage plate; 22. Lower crimping wheel assembly; 221. Lower crimping rotating wheel; 222. Lower crimping front wheel; 223. Lower crimping rear wheel; 224. Lower crimping driven wheel; 225. Lower drive shaft; 226. Tensioning block; 23. Lower press line synchronous belt; 231. Press line protrusion; 3. Adjustment mechanism; 31. Guide assembly; 311. Guide block; 312. Guide plate; 32. Lifting transmission assembly; 321. Transmission screw; 322. Nut seat; 33. Drive assembly; 331. Mounting seat; 332. Servo motor; 333. Coupling; 4. Lower linkage plate drive assembly; 5. Upper cutter disc assembly; 6. Lower cutter disc assembly; 7. Double screw drive assembly; 8. Paper scraping assembly; 9. Pre-press line assembly; 91. Upper pre-press line wheel; 92. Lower pre-press line wheel; 93. Pre-press line wheel drive shaft; 10. Fork mechanism. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention are within the scope of protection of the present invention.

[0021] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0022] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0023] In the description of the present invention, if words such as "several" are used, they mean one or more; "more" means two or more; "greater than," "less than," and "exceed" are understood to exclude the number itself; and "above," "below," and "within" are understood to include the number itself. The terms "first," "second," and "third" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number of the indicated technical features, or as implicitly specifying the order of the indicated technical features.

[0024] The following is combined with Figure 1-7 , an embodiment of a corrugated cardboard crease pressing device of the present invention is further described in detail.

[0025] A corrugated cardboard crease pressing device, such as Figures 1 to 3 As shown, it includes an upper pressing mechanism 1 and a lower pressing mechanism 2 for pressing the upper and lower surfaces of the cardboard, and the number and position of the upper pressing mechanism 1 and the lower pressing mechanism 2 correspond one to one; the upper pressing mechanism 1 includes an upper linkage plate 11, an upper pressing wheel group 12 installed on one side of the upper linkage plate 11 and equidistantly arranged along its width direction, and an upper pressing synchronous belt 13 covered and connected to the upper pressing wheel group 12, an adjusting mechanism 3 for adjusting the pressing gap is provided between the upper linkage plate 11 and the upper pressing wheel group 12, and the adjusting mechanism 3 is movably connected to the upper pressing wheel group 12; the outer side of the upper pressing wheel group 12 is a gear structure; the inner side surface of the upper pressing synchronous belt 13 is provided with a tooth groove meshing with the gear structure, and the outer side surface of the upper pressing synchronous belt 13 is provided with a pressing groove 131 near the middle position, and the vertical cross-section of the pressing groove 131 is a semicircular arc structure; The lower wire pressing mechanism 2 includes a lower linkage plate 21, a lower wire pressing wheel group 22 installed on one side of the lower linkage plate 21 and arranged equidistantly along its width direction, and a lower wire pressing synchronous belt 23 wrapped around and connected to the lower wire pressing wheel group 22. A lower linkage plate driving assembly 4 is provided at the bottom end of the lower linkage plate 21 corresponding to the position of the lower wire pressing wheel group 22; the outer side of the lower wire pressing wheel group 22 is a gear tooth structure; the inner surface of the lower wire pressing synchronous belt 23 is provided with a tooth groove meshing with the gear tooth structure, and the outer surface of the lower wire pressing synchronous belt 23 is provided with a wire pressing protrusion 231 adapted to the wire pressing groove 131, and the middle part of the wire pressing protrusion 231 is a convex arc profile and transitions to a planar structure on both sides.

[0026] Specifically, by adopting the collaborative operation mode of the upper and lower pressing synchronous belts 23, the pressing groove 131 of the upper pressing synchronous belt 13 and the pressing protrusion 231 of the lower pressing synchronous belt 23 are used to form a continuous flexible pressing area, and the pressing stress is dispersed by the arc profile, which reduces the risk of cardboard fiber breakage compared with traditional pressing wheels, and is especially suitable for low-weight or high-humidity cardboard; at the same time, compared with the traditional method of rolling with pressing wheels, the upper and lower pressing synchronous belts are engaged with the upper and lower pressing wheel groups, which not only ensures that the indentation position is centered, but also eliminates the problem of cardboard offset and damage during high-speed transportation; in addition, the adjustment mechanism 3 is used to adjust the gap between the upper and lower pressing mechanisms according to the different thicknesses of cardboards, further improving the applicability of the corrugated cardboard crease pressing device, thereby greatly improving the forming accuracy and production efficiency of the carton.

[0027] It is worth noting that the lateral movement drive assembly 4 includes a bidirectional linear slide, a transmission rod, and a driving member. The bidirectional linear slide extends along the left and right sides of the slotted module, and the upper linkage plate and the lower linkage plate are slidably connected to the linear slide through the linkage plate mounting seat and the slider; the transmission rod passes through the lower linkage and is transmission-connected to the driving member, which is fixed to the bottom end of the lower linkage plate, and the output end of the driving member is connected to the transmission rod by setting a coupling. Among them, the driving member can be a servo motor, which drives the transmission rod to rotate through the driving member so that the lower linkage plate slides along the bidirectional linear slide, thereby ensuring that the upper linkage plate and the lower linkage plate move synchronously and remain on the same axis during lateral movement adjustment, thereby avoiding the problem of the upper and lower pressing mechanisms offsetting during the pressing process, resulting in the indentation being not centered.

[0028] In this embodiment, if Figure 4 、 5 As shown, the adjusting mechanism 3 includes a guide assembly 31, a lifting transmission assembly 32 and a driving assembly 33. The guide assembly 31 includes a guide block 311 with a guide rail on one side and a guide plate 312 connected to the guide block 311. One side of the guide block 311 is fixedly connected to the upper linkage plate 11, and the other side is slidably connected to the guide plate 312 through the guide rail; the lifting transmission assembly 32 includes a transmission screw 321 and a nut seat 322. The nut seat 322 is fixed to the guide plate 312; one end of the transmission screw 321 is threadedly engaged with the nut seat 322, and the other end is transmission-connected to the driving assembly 33; the driving assembly 33 includes a mounting seat 331, a servo motor 332 and a coupling 333. The mounting seat 331 is fixedly connected to the upper linkage plate 11, and one side of the mounting seat 331 is connected to the coupling 333; the coupling 333 is rotatably connected to the output end of the servo motor 332 and is linkage-connected with the transmission screw 321.

[0029] Specifically, in order to adapt to cardboards of different thicknesses for creasing, the adjustment mechanism 3 adjusts the gap between the upper creasing wheel group 12 and the lower creasing wheel group 22 so that the creasing protrusion 231 and the creasing groove 131 act on a specific position of the cardboard and form a crease; the specific adjustment process is as follows: the servo motor 332 outputs power through the coupling 333, driving the transmission screw 321 to rotate around the axis, and the nut seat 322 threadedly engaged with the transmission screw 321 then moves along its axial direction, and drives the guide plate 312 to rise and fall vertically along the guide block 311. Among them, the guide rail on one side of the guide block 311 is precisely slidably engaged with the guide plate 312, which constrains the degree of freedom of deviation during the adjustment process, ensuring that the upper creasing wheel group 12 as a whole moves smoothly along the preset trajectory, thereby accurately controlling the pressing gap between the upper creasing synchronous belt 13 and the lower creasing synchronous belt 23. When the cardboard thickness changes, the servo motor 332 responds to the control command and rotates in the opposite direction, synchronously driving the transmission screw 321 in the opposite direction. Leveraging the mechanical properties of the nut pair of the transmission screw 321, the rotational motion is converted into linear displacement of the guide plate 312, thereby simultaneously driving the upper crimping wheel assembly 12 up and down. During this process, the multi-point constraint design of the guide assembly 31 effectively suppresses lateral vibration, ensuring that the crimping grooves 131 and crimping protrusions 231 of the upper and lower crimping timing belts are always precisely aligned, avoiding uneven indentations caused by misalignment.

[0030] In this embodiment, if Figure 4 、 5 As shown, the upper press line wheel group 12 includes an upper press line rotating wheel 121, an upper press line front wheel 122, an upper press line rear wheel 123 and an upper press line driven wheel 124. The upper press line rotating wheel 121 is installed on the upper linkage plate 11, and the upper press line rotating wheel 121 is key-connected with an upper drive shaft 125, and the upper drive shaft 125 is driven by the driving device of the corrugated cardboard printing and slotting machine to rotate synchronously; there are multiple upper press line driven wheels 124, and the multiple upper press line driven wheels 124 are arranged side by side below the upper press line rotating wheel 121; the upper press line front wheel 122 and the upper press line rear wheel 123 are respectively located on both sides of the upper press line driven wheel 124, and the upper press line front wheel 122, the upper press line rear wheel 123 and the upper press line driven wheel 124 are installed on the guide plate 312 and driven by the upper press line synchronous belt 13.

[0031] Specifically, the upper drive shaft 125 drives the upper pressing line rotating wheel 121 to rotate through a key connection, and the upper pressing line rotating wheel 121 transmits power to a plurality of upper pressing line driven wheels 124 arranged side by side through the upper pressing line synchronous belt 13, and simultaneously drives the upper pressing line front wheel 122 and the upper pressing line rear wheel 123 on both sides to operate synchronously. The axial layout of the upper pressing line wheel group 12 uses the upper pressing line rotating wheel 121 as the power source, the upper pressing line driven wheel 124 as the pressure support point, the upper pressing line front wheel 122 and the upper pressing line rear wheel 123 as the synchronous belt tensioning guide wheels, forming a closed-loop transmission path. Under the driving action of the servo motor 332, the upper pressing line front wheel 122, the upper pressing line rear wheel 123 and the upper pressing line driven wheel 124 fixed on the guide plate 312 can be vertically lifted and lowered as a whole along the guide block 311, and then the pressing line synchronous belt 13 and the lower pressing line synchronous belt 23 can be adjusted.

[0032] The meshing transmission between the inner tooth grooves of the upper crimping synchronous belt 13 and the gear structure ensures the synchronization of power transmission, while the cooperation between the crimping groove 131 and the crimping protrusion 231 achieves continuous and flexible forming of the crease. This structure, through the synergistic effect of the rigid guide supported by multiple points and the dynamic tensioning of the synchronous belt, not only avoids the problem of local stress concentration that is prone to occur with traditional crimping wheels, but also ensures that the crimping trajectory remains centered and stable. In addition, when the equipment is running at high speed, the equidistant arrangement of the upper crimping wheel group 12 and the multi-point contact characteristics of the upper crimping synchronous belt 13 effectively disperse the force on the cardboard, significantly reducing the risk of indentation deviation and fiber tearing, and providing reliable protection for the continuous production of cartons of different specifications.

[0033] In this embodiment, if Figure 4 、 5 As shown, an upper pressing support wheel 126 is provided between the upper pressing rotating wheel 121 and the upper pressing driven wheel 124. The upper pressing support wheel 126 is installed on the guide plate 312, and the upper pressing support wheel 126 and the outer sides of the upper pressing rotating wheel 121 and the upper pressing rear wheel 123 are covered with a transmission belt 127.

[0034] Specifically, a tensioning synchronous wheel 128 for adjusting the tension of the transmission belt 127 is provided between the upper pressure line support wheel 126 and the upper pressure line rotating wheel 121. The tensioning synchronous wheel 128 compensates for the tightness of the transmission belt 127 in real time by adjusting its own position. When the servo motor 332 drives the guide plate 312 to move up and down to adjust the pressure line gap, the tensioning synchronous wheel 128 automatically adjusts the belt detour path as the guide plate 312 moves, eliminating the belt slack or over-tightening caused by height changes. This structure forms a dynamic balance during high-speed operation - the upper pressure line support wheel 126 supports the transmission belt 127 to prevent it from sagging, and the tensioning synchronous wheel 128 corrects the trajectory of the transmission belt 127. The two cooperate to maintain a constant tension state in the transmission system, which not only ensures the synchronization of power transmission, but also ensures that the pressure line groove 131 of the upper pressure line synchronous belt 13 is always precisely aligned with the pressure line protrusion 231 of the lower pressure line synchronous belt 23. Its advantage lies in the adaptability of the mechanical structure, which solves the problem of intermittent indentation caused by belt vibration in traditional creasing devices, while reducing the wear of transmission components, so that the creasing process can still maintain stable forming quality when continuously adjusting the gap, providing reliable support for the flexible production of cardboards of different thicknesses.

[0035] In this embodiment, if Figure 6 、 7 As shown, the lower pressing wheel group 22 includes a lower pressing rotating wheel 221, a lower pressing front wheel 222, a lower pressing rear wheel 223 and a lower pressing driven wheel 224. The lower pressing rotating wheel 221 is key-connected with a lower drive shaft 225, and the lower drive shaft 225 is driven by the driving device of the corrugated cardboard printing and slotting machine to rotate synchronously; a plurality of lower pressing driven wheels 224 are provided, and a plurality of lower pressing driven wheels 224 are arranged side by side above the lower pressing rotating wheel 221; the lower pressing front wheel 222 and the lower pressing rear wheel 223 are respectively located on both sides of the lower pressing driven wheel 224; the lower pressing rotating wheel 221, the lower pressing front wheel 222, the lower pressing rear wheel 223 and the lower pressing driven wheel 224 are driven by a lower pressing synchronous belt 23.

[0036] Specifically, a tensioning block 226 is provided between the lower pressure line front wheel 222 and the adjacent lower pressure line driven wheel 224. One end of the tensioning block 226 is fixedly connected to the lower linkage plate 21, and the top end of the tensioning block 226 receives the lower pressure line timing belt 23. The lower pressure line mechanism 2 maintains the tension of the lower pressure line timing belt 23 through the tensioning block 226. The transmission process of the lower pressure line wheel assembly 12 is the same as that of the upper pressure line wheel assembly 12, so the working principle of the lower pressure line wheel assembly 12 will not be described in detail.

[0037] In this embodiment, if Figure 4 、 5 As shown, the upper linkage plate 11 is located on both sides of the upper pressing wheel group 12 and is provided with an upper cutter disc assembly 5 for grooving the cardboard, and a double screw transmission assembly 7 is connected to the top of the upper cutter disc assembly 5.

[0038] In this embodiment, if Figure 6 、 7 As shown, the lower linkage plate 21 is located on both sides of the lower pressing wheel group 22 and is provided with a lower cutter disc assembly 6 for grooving the cardboard. The lower cutter disc assembly 6 corresponds to the position of the upper cutter disc assembly 5, and the lower part of the lower cutter disc assembly 6 is connected with a paper scraping assembly 8.

[0039] Specifically, the dual-screw transmission assembly 7 includes a ball bearing seat, a threaded screw, and a synchronous sprocket assembly. The ball bearing seat is fixed to the upper linkage plate 11. The threaded screw transversely penetrates the upper linkage plate 11 and is in transmission connection with the ball bearing seat. The synchronous sprocket assembly includes a steering sprocket, a synchronous sprocket, and a steering motor. One end of the steering sprocket is in transmission connection with the steering motor. Multiple sets of synchronous sprockets are provided. Synchronous chains are wrapped around and connected between the multiple sets of synchronous sprockets. One side of the synchronous chain is in transmission connection with a reversing sprocket to drive the multiple synchronous chains to rotate synchronously. The steering motor drives the reversing sprocket to drive the synchronous chain. The multiple sets of synchronous sprockets rotate synchronously under the chain wrap, driving the threaded screw transversely penetrating the upper linkage plate 11 to rotate synchronously. The ball bearing seat translates axially as the lead screw rotates, driving the upper cutterhead assembly 5 to move left and right. Simultaneously, the lower cutterhead assembly 6 is provided with a sliding assembly at its bottom end to drive its lateral movement. The sliding assembly includes a linear slide, a slider, and a drive motor. The drive motor drives the lower cutterhead assembly 6 to slide along the linear slide, and the drive motor is connected to the steering motor via electrical signals to achieve dynamic alignment between the lower cutterhead assembly 6 and the upper cutterhead assembly 5. During this process, the multi-node synchronization characteristics of the chain drive eliminate the cumulative error of unilateral drive, ensuring consistent slotting depth of the upper cutterhead assemblies 5 on both sides.

[0040] Among them, the paper scraping assembly 8 includes a paper scraping knife and a paper scraping support rod. One end of the paper scraping knife is connected to the lower linkage plate 21 through the paper scraping support rod, and the other end is in contact with the lower cutter disc assembly 6. When the upper and lower cutter disc assemblies 6 slot the cardboard under the control of the double-screw transmission assembly 7, the waste generated by the cutting of the lower cutter disc assembly 6 is immediately attached to the surface of the cutter. At this time, the paper scraping knife is tightly fitted with the lower cutter disc assembly 6 at a preset inclination angle under the rigid support of the paper scraping support rod, so that the sharp edge of the paper scraping knife continuously scrapes the surface of the lower cutter disc during the rotation of the cutter, thereby peeling off the waste along the tangential direction and guiding it to the waste collection area by its own weight or airflow. The paper scraping support rod can be designed to be elastically adjusted and fixed on the lower linkage plate 21, so that it can adapt to the slight deformation of the lower cutter disc caused by wear, ensuring that the paper scraping knife always maintains the optimal contact pressure with the lower cutter disc, avoiding excessive friction and damage to the cutter, thereby extending the service life of the paper scraping knife.

[0041] In this embodiment, if Figure 1As shown, a pre-pressing line assembly 9 is also provided on one side of the upper linkage plate 11 and the lower linkage plate 21 at the position corresponding to the upper cutter disc assembly 5 and the lower cutter disc assembly 6. The pre-pressing line assembly 9 includes an upper pre-pressing line wheel 91, a lower pre-pressing line wheel 92 and a pre-pressing line wheel drive shaft 93. The upper pre-pressing line wheel 91 and the lower pre-pressing line wheel 92 are both key-connected with the pre-pressing line wheel drive shaft 93, and a fork mechanism 10 is connected between the upper pre-pressing line wheel 91 and the lower pre-pressing line wheel 92 and the upper linkage plate 11 and the lower linkage plate 21; the pre-pressing line wheel drive shaft 93 is driven by the drive device of the corrugated cardboard printing and slotting machine to rotate synchronously.

[0042] Specifically, before the cardboard enters the upper pressing mechanism 1 and the lower pressing mechanism 2 along the conveying direction, the cardboard is first conveyed to the pre-pressing assembly 9, and then the driving device of the corrugated cardboard printing and slotting machine drives the pre-pressing wheel drive shaft 93 to rotate synchronously, and drives the upper pre-pressing wheel 91 and the lower pre-pressing wheel 92 to rotate in the opposite direction through the key connection, forming a pre-pressing on the upper and lower surfaces of the cardboard to ensure that the cardboard enters the pressing area smoothly; among them, the fork mechanism 10 is connected to the upper and lower linkage plates. The fork mechanism 10 is a commonly used structure in existing printing machines, so its specific structure and working principle are no longer described in detail.

[0043] When the cardboard thickness changes or processing parameters are adjusted, the spacing and pressure between the upper and lower pre-pressing wheels 92 are adjusted to ensure that the pre-pressing depth precisely matches the concave-convex structure of the main pressing process. During the pre-pressing process, the linear pressure generated by the counter-rotating wheels creates a directional pre-crease in the cardboard fibers before entering the main pressing area. This not only eliminates surface warping but also provides a guide for the concave-convex structure of the subsequent synchronous belt pressing. By connecting the pre-pressing and main pressing processes, this structure breaks down the concentrated stress of a traditional single press into two gradual pressure applications. This not only prevents fiber breakage caused by sudden stress on the cardboard, but also guides the main pressing trajectory to the center by the pre-pressing, significantly improving the straightness and uniformity of the final crease.

[0044] Working principle of the present invention: The cardboard is first preliminarily positioned by the pre-pressing assembly 9. The upper pre-pressing wheel 91 and the lower pre-pressing wheel 92 apply moderate pre-pressing to the cardboard under the action of the fork mechanism 10 to eliminate surface warping; then the cardboard enters the pressing area of ​​the upper and lower pressing synchronous belts. At this time, the servo motor 332 drives the transmission screw 321 through the coupling 333, and drives the guide plate 312 to move vertically along the guide block 311. The lifting transmission assembly 32 is adjusted to ensure that the gap between the upper pressing synchronous belt 13 and the lower pressing synchronous belt 23 is accurately adapted to the thickness of the cardboard; then the upper drive shaft 125 drives the upper pressing rotating wheel 121 to rotate, and drives the upper pressing driven wheel through the transmission belt 127 124 realizes multi-wheel synchronous rotation, and the upper pressing synchronous belt 13 relies on the inner tooth groove to engage with the gear structure of the upper pressing wheel group 12 for stable transmission, so that the pressing groove 131 of the upper pressing synchronous belt 13 maintains dynamic contact with the cardboard surface; at the same time, the lower driving shaft 225 drives the lower pressing rotating wheel 221 to rotate, and drives the lower pressing wheel group 22 through the lower pressing synchronous belt 23 to realize multi-wheel synchronous rotation, and the pressing protrusion 231 of the lower pressing synchronous belt 23 stably fits the lower surface of the cardboard, and forms a closed pressure area with the upper pressing groove 131, and flexibly squeezes the cardboard through the concave and convex structure, thereby completing the formation of uniform indentations on the upper and lower surfaces of the cardboard.

[0045] The examples of this specific embodiment are all 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, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A corrugated cardboard crease pressing device, comprising an upper pressing mechanism and a lower pressing mechanism for pressing the upper and lower surfaces of the cardboard, wherein the number and position of the upper pressing mechanism and the lower pressing mechanism correspond one to one; characterized in that: The upper wire pressing mechanism includes an upper linkage plate, an upper wire pressing wheel group installed on one side of the upper linkage plate and arranged equidistantly along the width direction of the upper wire pressing wheel group, and an upper wire pressing synchronous belt covered and connected to the upper wire pressing wheel group, an adjustment mechanism for adjusting the wire pressing gap is provided between the upper linkage plate and the upper wire pressing wheel group, and the adjustment mechanism is movably connected to the upper wire pressing wheel group; the outer side of the upper wire pressing wheel group is a gear structure; the inner surface of the upper wire pressing synchronous belt is provided with a tooth groove meshing with the gear structure, and the outer surface of the upper wire pressing synchronous belt is provided with a wire pressing groove near the middle position, and the vertical cross-section of the wire pressing groove is a semicircular arc structure; The lower wire pressing mechanism includes a lower linkage plate, a lower wire pressing wheel group installed on one side of the lower linkage plate and arranged equidistantly along the width direction of the lower linkage plate, and a lower wire pressing synchronous belt wrapped around the lower wire pressing wheel group. A lower linkage plate driving assembly is provided at the bottom end of the lower linkage plate corresponding to the position of the lower wire pressing wheel group; the outer side of the lower wire pressing wheel group is a gear structure; the inner surface of the lower wire pressing synchronous belt is provided with a tooth groove meshing with the gear structure, and the outer surface of the lower wire pressing synchronous belt is provided with a wire pressing protrusion adapted to the wire pressing groove near the middle position, the middle part of the wire pressing protrusion is a convex arc profile and transitions to a plane structure on both sides; The gap between the upper pressing mechanism and the lower pressing mechanism is adjusted by the adjusting mechanism so that the pressing protrusion and the pressing groove act on a specific position of the paperboard to form a fold.

2. The corrugated cardboard crease pressing device according to claim 1, characterized in that: The adjusting mechanism includes a guide assembly, a lifting transmission assembly and a driving assembly, the guide assembly includes a guide block with a guide rail on one side and a guide plate connected to the guide block, one side of the guide block is fixedly connected to the upper linkage plate, and the other side is slidably connected to the guide plate through the guide rail; the lifting transmission assembly includes a transmission screw and a nut seat, and the nut seat is fixed to the guide plate; one end of the transmission screw is threadedly engaged with the nut seat, and the other end is transmission-connected to the driving assembly; the driving assembly includes a mounting seat, a servo motor and a coupling, the mounting seat is fixedly connected to the upper linkage plate, and one side of the mounting seat is connected to the coupling; the coupling is rotatably connected to the output end of the servo motor and is linkage-connected with the transmission screw.

3. The corrugated cardboard crease pressing device according to claim 2, characterized in that: The upper press line wheel group includes an upper press line rotating wheel, an upper press line front wheel, an upper press line rear wheel and an upper press line driven wheel. The upper press line rotating wheel is installed on the upper linkage plate, and the upper press line rotating wheel is keyed to an upper drive shaft. The upper drive shaft is driven by the driving device of the corrugated cardboard printing and slotting machine to rotate synchronously; there are multiple upper press line driven wheels, and the multiple upper press line driven wheels are arranged side by side, and the upper press line driven wheel is located below the upper press line rotating wheel; the upper press line front wheel and the upper press line rear wheel are respectively located on the left and right sides of the upper press line driven wheel, and the upper press line front wheel, the upper press line rear wheel and the upper press line driven wheel are installed on the guide plate and rotate synchronously through the upper press line synchronous belt.

4. The corrugated cardboard crease pressing device according to claim 3, characterized in that: An upper wire pressing support wheel is provided between the upper wire pressing rotating wheel and the upper wire pressing driven wheel. The upper wire pressing support wheel is installed on the guide plate, and the upper wire pressing support wheel is respectively covered with a transmission belt on the outer side surface of the upper wire pressing rotating wheel and the upper wire pressing rear wheel.

5. The corrugated cardboard crease pressing device according to claim 4, characterized in that: A tensioning synchronous wheel for adjusting the tension of the transmission belt is provided between the upper wire pressing support wheel and the upper wire pressing rotating wheel.

6. The corrugated cardboard crease pressing device according to claim 3, characterized in that: The lower press wheel group includes a lower press rotating wheel, a lower press front wheel, a lower press rear wheel and a lower press driven wheel. The lower press rotating wheel is keyed to a lower drive shaft, and the lower drive shaft is driven by a driving device of the corrugated cardboard printing and slotting machine to rotate synchronously. There are multiple lower press driven wheels, and the multiple lower press driven wheels are arranged side by side above the lower press rotating wheel. The lower press front wheel and the lower press rear wheel are respectively located on both sides of the lower press driven wheel. The lower press rotating wheel, the lower press front wheel, the lower press rear wheel and the lower press driven wheel are rotated synchronously by a lower press synchronous belt.

7. The corrugated cardboard crease pressing device according to claim 6, characterized in that: A tensioning block is provided between the lower pressing line front wheel and the lower pressing line driven wheel on the adjacent side. One end of the tensioning block is fixedly connected to the lower linkage plate, and the top end of the tensioning block receives the lower pressing line synchronous belt.

8. The corrugated cardboard crease pressing device according to claim 1, characterized in that: The upper linkage plate is located on both sides of the upper pressing wheel group and is provided with an upper cutter disc assembly for grooving the cardboard. The upper part of the upper cutter disc assembly is connected with a double screw transmission assembly.

9. The corrugated cardboard crease pressing device according to claim 8, characterized in that: The lower linkage plate is located on both sides of the lower pressing wheel group and is provided with a lower cutter disc assembly for grooving the cardboard. The lower cutter disc assembly corresponds to the position of the upper cutter disc assembly, and a paper shoveling assembly is connected below the lower cutter disc assembly.

10. The corrugated cardboard crease pressing device according to claim 9, characterized in that: A pre-pressing line assembly is also provided on one side of the upper linkage plate and the lower linkage plate at the position corresponding to the upper cutter disc assembly and the lower cutter disc assembly. The pre-pressing line assembly includes an upper pre-pressing line wheel, a lower pre-pressing line wheel and a pre-pressing line wheel driving shaft. The upper pre-pressing line wheel and the lower pre-pressing line wheel are both key-connected with the pre-pressing line wheel driving shaft, and a fork mechanism is connected between the upper pre-pressing line wheel and the lower pre-pressing line wheel and the upper linkage plate and the lower linkage plate; the pre-pressing line wheel driving shaft is driven by the driving device of the corrugated cardboard printing and slotting machine to rotate synchronously.

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