A creasing device for corrugated board

Abstract

The utility model discloses a kind of corrugated board anti-breaking line pressing devices, including rack, workbench, line pressing part, support, pretreatment part and controller;The workbench is fixedly connected on rack and extends rack front and rear end;The rack above the workbench is fixedly connected with line pressing part;Two supports of symmetric setting are fixedly connected in one end of the rack transversely;The pretreatment part is fixedly connected on the support;The workbench below the support extends length is longer than support length;The rack upper end is fixedly connected with controller;The controller is electrically connected with line pressing part and pretreatment part respectively.The utility model has the advantages that: by setting high-frequency atomizing nozzle, micron cold fog is generated, the change of physical state of paperboard fiber before pressing is carried out, so that paper fiber is subjected to the strong extrusion of line pressing wheel, and plastic deformation occurs instead of brittle fracture, solve the industry pain point that high gram weight, low moisture or in dry climate paperboard surface paper is fragile and easy to crack, reduce waste rate to minimum.

Description

Technical Field

[0001] This utility model relates to the field of corrugated cardboard production technology, and in particular to a corrugated cardboard anti-crack creasing device. Background Technology

[0002] Corrugated board crease pressing devices use convex and concave crease pressing rollers to press clear creases (creases) onto the corrugated board at high speed, enabling precise folding in subsequent processes. When producing high-grammage, high-rigidity, low-moisture board, or in dry winter environments, the fibers of the board linerboard are brittle and have poor toughness. However, traditional crease pressing rollers forcefully press with pure mechanical force, which can easily lead to breakage of the linerboard fibers. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a corrugated cardboard anti-crack creasing device.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A corrugated cardboard anti-burst creasing device includes a frame, a worktable, a creasing section, a support, a pretreatment section, and a controller. The worktable is fixed to the frame and extends out from the front and rear ends of the frame. The creasing section is fixed to the frame above the worktable. Two symmetrically arranged supports are horizontally fixed to one end of the frame. The pretreatment section is fixed to the support. The worktable extends outward from the support for a length longer than the support. The controller is fixed to the upper end of the frame. The controller is electrically connected to both the creasing section and the pretreatment section.

[0006] Furthermore, the pressing section includes a transverse support plate, a pressing roller, and a motor; two transverse support plates are symmetrically fixed to the frame; two pressing rollers are movably connected between the two transverse support plates; one end of the pressing roller is fixedly connected to the output end of the motor; the motor support is fixedly connected to the frame and electrically connected to the controller.

[0007] Furthermore, the pressure roller includes a main shaft and a pressure wheel fixedly connected to the main shaft.

[0008] Furthermore, the workbench is provided with driven wheels located directly below the pressing wheels, corresponding to the number of pressing wheels.

[0009] Furthermore, the pretreatment unit includes a water pipe, a connecting pipe, a solenoid valve, a hollow plate, a fixing block, and a nozzle; the water pipe is connected to the connecting pipe; the connecting pipe is inverted T-shaped; a solenoid valve is provided at the connection between the water pipe and the connecting pipe; the solenoid valve is electrically connected to the controller; the hollow plate is horizontally fixed between two supports; the fixing block is fixed to the connecting pipe; the upper end of the connecting pipe extends into the hollow plate and can move relative to the hollow plate, and is fixed by the fixing block; the lower end of the inverted T-shape is symmetrically and detachably connected to two nozzles; the nozzles are electrically connected to the controller.

[0010] Furthermore, a booster pump is installed on the water pipe.

[0011] Furthermore, the front of the bracket is provided with a limiting member; the limiting member includes a vertical plate and an inclined plate. The upper end of the vertical plate is fixedly connected to the lower end of the bracket; the lower end of the inclined plate is fixedly connected to the lower end of the vertical plate, and the upper end is fixedly connected to the front end of the bracket.

[0012] The beneficial effects of this utility model are:

[0013] By setting up high-frequency atomizing nozzles, micron-level cold mist is generated, which changes the physical state of the paperboard fibers before pressing. This causes the paper fibers to undergo plastic deformation rather than brittle fracture when subjected to strong pressure from the pressing rollers, fundamentally solving the industry pain point of paperboard surface paper becoming brittle and easily cracked under high basis weight, low moisture or dry climate, and minimizing the scrap rate. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0016] Figure 3 This is a schematic diagram of the pressure roller structure.

[0017] In the picture,

[0018] 1-Frame, 2-Workbench, 3-Crimping section, 4-Support, 5-Pre-treatment section, 6-Controller, 7-Limiting component;

[0019] 31-Transverse support plate, 32-Crimping roller, 33-Motor;

[0020] 51-Water pipe, 52-Connecting pipe, 53-Solenoid valve, 54-Hollow plate, 55-Fixing block, 56-Sprayer head, 57-Booster pump;

[0021] 71-Vertical board, 72-Slanted board. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0023] Reference Figure 1-3 As shown, a corrugated cardboard anti-crack creasing device is mainly used in corrugated cardboard production lines or subsequent processing steps to creasing (screase) cardboard. In particular, through pretreatment before creasing, it fundamentally solves the technical problem of easy cracking of cardboard linerboard during creasing under high basis weight, low moisture, or dry environments. It includes a frame 1, a worktable 2, a creasing section 3, supports 4, a pretreatment section 5, and a controller 6. The worktable 2 is fixed to the frame 1 and extends from the front and rear ends of the frame 1. The creasing section 3 is fixed to the frame 1 above the worktable 2. Two symmetrically arranged supports 4 are horizontally fixed to one end of the frame 1. The pretreatment section 5 is fixed to the supports 4. The worktable 2 extending below the supports 4 has a length longer than the supports 4. The controller 6 is fixed to the upper end of the frame 1. The controller 6 is electrically connected to both the creasing section 3 and the pretreatment section 5.

[0024] It should be noted that the frame 1 is the basic load-bearing structure of the entire device. It can be constructed using, for example, Q235 carbon steel square tubing or structural steel, through welding, bolting, or other methods to form a stable base and frame. The frame 1 provides a rigid mounting base for all subsequent functional components. The workbench 2 is fixedly connected to the frame 1. In this embodiment, the workbench 2 is preferably a flat metal plate (e.g., stainless steel plate or chrome-plated steel plate), which is rigidly fixed to the horizontal surface of the frame 1 by welding or bolting. The main function of the workbench 2 is to support and guide the corrugated cardboard through the device at a set height and path. Figure 1As shown, the workbench 2 is relatively long, extending beyond the front and rear ends of the frame 1 to form a stable feeding and discharging area, ensuring the cardboard remains stable when entering and leaving the core working area. The creasing section 3 is located on the frame 1 above the workbench 2. Specifically, the creasing section 3 is rigidly fixed to the main frame of the frame 1 by its own structural components, and its working position is located above the workbench 2, used to perform a pressing action on the passing cardboard. A support 4 is located at one end of the frame 1. In this embodiment, this end is preferably the cardboard feeding end. Two supports 4 are symmetrically arranged, laterally (i.e., perpendicular to the cardboard running direction) fixed to both sides of the frame 1. The supports 4 are preferably cantilever structures, for example, made of bent steel plates or welded steel profiles, extending horizontally outward (i.e., in the cardboard feeding direction) from the main body of the frame 1. The function of the pretreatment section 5 is to precisely soften the path to be pressed before the cardboard reaches the creasing section 3. The pretreatment section 5 is fixed between the two supports 4 by its own structural components, and its working area is located above the workbench 2. The workbench 2 extending below the support 4 extends beyond the cantilever length of the support 4. This ensures that when the "front end" of the corrugated cardboard is about to enter the pretreatment section 5 for spraying, the "body" of the cardboard remains firmly supported by the surface of the workbench 2, preventing the cardboard from shaking or warping due to suspension, thus guaranteeing the accuracy of the spraying position in the pretreatment section 5. The controller 6 is the "brain" of this device, preferably a PLC (Programmable Logic Controller), such as a Siemens S7-1200 series or a Mitsubishi FX5U series. The controller 6 is installed in an electrical control box (not shown) at the upper end of the frame 1. The controller 6 is electrically connected to the crimping section 3 (specifically its drive motor) and the pretreatment section 5 (specifically its solenoid valve and nozzle) via electrical cables.

[0025] Specifically, the creasing section 3 includes a transverse support plate 31, creasing rollers 32, and a motor 33. Two transverse support plates 31 are symmetrically fixed to the frame 1. Two creasing rollers 32 are movably connected between the two transverse support plates 31. One end of each creasing roller 32 is fixedly connected to the output end of the motor 33. The motor 33 is mounted on a bracket fixed to the frame 1 and electrically connected to a controller 6. The transverse support plates 31 are configured as two symmetrical pieces, for example, made of thick steel plates, and are rigidly fixed (e.g., by high-strength bolts) to the two side columns of the frame 1, parallel to each other. The transverse support plates 31 serve as high-rigidity mounting bases for supporting the creasing rollers 32. Two creasing rollers 32 are provided. The axes of these two creasing rollers 32 are parallel to each other and are movably connected (i.e., rotatably mounted) between the two transverse support plates 31 by bearings and bearing seats (not shown). These two creasing rollers 32 are used to press two parallel creasing lines on the paperboard. The motor 33 provides power for the rotation of the creasing rollers 32. Preferably, motor 33 can be a servo motor, such as a Panasonic A6 series servo motor, to achieve precise speed control. The support of motor 33 is bolted to frame 1. The output end of motor 33 is fixed to the end of one of the creasing rollers 32 via a coupling (not shown). Another creasing roller 32 can rotate synchronously with the first creasing roller 32 via gear transmission (not shown), or be driven by another independent motor 33. Controller 6 can control the start, stop, and speed of motor 33, ensuring its creasing speed is strictly synchronized with the paperboard conveying speed.

[0026] Specifically, the pressure roller 32 includes a main shaft 321 and pressure rollers 322 fixedly connected to the main shaft. The main shaft 321 is the rotating body, and is made of, for example, 45# steel after quenching and tempering. The pressure rollers 322 are the "punches" that perform the pressing action, and have V-shaped or U-shaped protruding edges on their outer circumference. The pressure rollers 322 are fixedly connected to the main shaft 321 by keys and keyways (or interference fits). In this embodiment, one or more pressure rollers 322 can be fixedly connected to each pressure roller 32 to achieve synchronous pressing of multiple lines.

[0027] Specifically, the worktable 2 is equipped with driven rollers 21 located directly below the crease rollers 322, corresponding in number to the number of crease rollers 322. The driven rollers 21 are positioned in slots within the worktable 2, directly below the crease rollers 322, and their number corresponds to the number of crease rollers 322 (e.g., two crease rollers 322 above and two driven rollers 21 below). Each driven roller 21 is a pressing "die," with a V-shaped or U-shaped groove on its outer circumference that matches the crease roller 322. The driven rollers 21 are mounted on the worktable 2 via bearings, allowing them to rotate passively and freely. When the cardboard is fed between the crease rollers 322 and the driven rollers 21, the motor 33 drives the crease rollers 322 to rotate, and the crease rollers 322 (punches) forcefully press the cardboard into the groove of the driven roller 21 (die) below, thereby forming a clear, deep crease on the cardboard.

[0028] Specifically, the pretreatment unit 5 includes a water pipe 51, a connecting pipe 52, a solenoid valve 53, a hollow plate 54, a fixing block 55, and nozzles 56. The water pipe 51 is connected to the connecting pipe 52. The connecting pipe 52 is inverted T-shaped. A solenoid valve 53 is provided at the connection between the water pipe 51 and the connecting pipe 52. The solenoid valve 53 is electrically connected to the controller 6. The hollow plate 54 is horizontally fixed between two supports 4. The fixing block 55 is fixed to the connecting pipe 52. The upper end of the connecting pipe 52 extends into the hollow plate 54 and can move relative to the hollow plate 54, and is fixed by the fixing block 55. Two nozzles 56 are symmetrically and detachably connected to the lower end of the inverted T-shape. The nozzles 56 are electrically connected to the controller 6. The water pipe 51 serves as the main water supply pipeline and is connected to an external clean water source (e.g., a pure water machine). The connecting pipe 52 is preferably made of stainless steel, and its overall structure is inverted T-shaped. The top of its "T"-shaped "vertical bar" connects to the water pipe 51, while the two ends of its "T"-shaped "horizontal bar" are used to connect to the nozzles. The connecting pipe 52 splits the water flow in two, supplying two nozzles. A solenoid valve 53 is located at the connection between the water pipe 51 and the connecting pipe 52. Preferably, the solenoid valve 53 is a high-speed response solenoid valve, such as an AirTAC 2K series or SMCVXZ series. Its function is to act as a quick switch for the "water circuit". The solenoid coil of the solenoid valve 53 is electrically connected to the output port of the controller 6. The controller 6 achieves millisecond-level precise on / off control of the water flow by sending an "on / off" electrical signal to the solenoid valve 53. The hollow plate 54 is a horizontal mounting plate, such as a rectangular hollow profile or a steel plate with weight-reducing holes, with both ends rigidly fixed (e.g., welded or bolted) between two brackets 4. The hollow plate 54 provides a stable mounting base for the connecting pipe 52 and the nozzle assembly. The fixing block 55, for example, is a pipe clamp or flange block, which is fixed to the "vertical rod" of the connecting pipe 52. The upper end of the "vertical rod" of the connecting pipe 52 extends into (i.e., through) a through hole in the hollow plate 54 and is fixed by the fixing block 55 located above the hollow plate 54 (e.g., by bolts). This structure allows the connecting pipe 52 (and the nozzle below it) to be securely suspended below the hollow plate 54. During installation and commissioning, the fixing block 55 can be loosened to allow the connecting pipe 52 to move relative to (e.g., slide up and down) within the through hole of the hollow plate 54, so as to adjust the height of the nozzle from the workbench 2. After adjustment, the fixing block 55 is then locked in place. Two nozzles 56 are provided, which are detachably (e.g., by threads or quick-connect fittings) connected to the two lower ends of the connecting pipe 52 (inverted T-shape). The spacing between these two nozzles is exactly the same as the spacing between the two pressure rollers 322 of the pressure section 3, ensuring a precise correspondence between the spray path and the pressure path. The nozzles 56 are the core actuators for achieving "breakage prevention." They are not ordinary pressure nozzles, but piezoelectric (ultrasonic) atomizing nozzles. Each nozzle 56 integrates a piezoelectric ceramic plate. The nozzles 56 are electrically connected to the controller 6 (or via a dedicated piezoelectric actuator that is in turn controlled by the controller 6).When controller 6 issues a command, [Action 1] solenoid valve 53 opens, and water flows through water pipe 51 and connecting pipe 52 to nozzle 56; [Action 2] controller 6 simultaneously applies a high-frequency electrical signal to nozzle 56. The piezoelectric ceramic plate inside nozzle 56 generates high-frequency vibration, "shattering" the water flowing over its surface into micron-sized (5-10μm) cold mist. This cold mist can be quickly and evenly absorbed by the cardboard fibers, instantly increasing the moisture content and flexibility of the creasing path without making the cardboard excessively wet.

[0029] Specifically, a booster pump 57 is installed on the water pipe 51. The booster pump 57 is preferably a small diaphragm pump or centrifugal pump, such as a Grundfos UPA 15-90 booster pump. Its function is to provide a stable and appropriate pressure (e.g., 2-3 Bar) for the water flow entering the water pipe 51, ensuring that the water flow can be stably supplied to the high-frequency atomizing nozzle 56 and preventing uneven atomization effect caused by fluctuations in the factory water pressure.

[0030] Specifically, a limiting member 7 is provided at the front of the support 4; the limiting member 7 includes a vertical plate 71 and an inclined plate 72. The upper end of the vertical plate 71 is fixedly connected to the lower end of the support 4; the lower end of the inclined plate 72 is fixedly connected to the lower end of the vertical plate 71, and the upper end is fixedly connected to the front end of the support 4. The limiting member 7 is used to guide the corrugated cardboard into the creasing device so that it can be better atomized.

[0031] The working principle of this utility model:

[0032] During operation, the controller 6 (preferably a PLC) is powered on and in standby mode. The high-frequency atomizing nozzle 56 of the pretreatment unit 5 and the crease roller 322 of the crease section 3 are mechanically precisely aligned (i.e., the spray path and crease path are perfectly aligned). The booster pump 57 is activated, providing stable water pressure to the water pipe 51. The corrugated cardboard (workpiece) is fed into the device by a conveyor system (not shown) and moves smoothly forward on the worktable 2. When the front end of the cardboard reaches the working area of ​​the pretreatment unit 5, an external sensor or host computer system sends a trigger signal to the controller 6. The controller 6 sends an "open" electrical signal to the solenoid valve 53. The valve core of the solenoid valve 53 opens, allowing water with stable pressure from the booster pump 57 and the water pipe 51 to instantly pass through the solenoid valve 53, flow into the connecting pipe 52, and be distributed to the two high-frequency atomizing nozzles 56. Simultaneously, the controller 6 sends an "atomization enable" electrical signal to the high-frequency atomizing nozzle 56 (or its dedicated high-frequency driver). Upon receiving a high-frequency electrical signal, the high-frequency atomizing nozzle 56 immediately generates ultrasonic vibrations of millions of times per second within its internal piezoelectric ceramic plate. This high-frequency vibration instantly "shatters" the water flow that has just reached the surface of the ceramic plate into micron-sized (e.g., 5-10 μm) cold mist. This micron-sized cold mist is precisely sprayed onto the surface of the corrugated cardboard. Due to the extremely fine droplets, they are rapidly absorbed by the fibers on the cardboard surface, rather than forming water droplets. This causes the cardboard's fiber moisture content to increase instantaneously only along the two paths it is about to be pressed, resulting in a significant increase in toughness (flexibility), changing its physical state from "brittle" to "tough." The precisely softened cardboard path continues forward in a very short time (e.g., 0.1-0.5 seconds) into the working area of ​​the creasing section 3. The motor 33 drives the creasing roller 32 (and its main shaft 321 and creasing wheel 322) to rotate at a linear speed strictly synchronized with the cardboard conveying speed. When the softening path of the cardboard is reached, the upper pressure roller 322 (punch) rotates and presses down, forcefully squeezing the softening path of the cardboard into the groove of the driven roller 21 (die) on the lower worktable 2. The fibers of the path have been sufficiently softened, and they will not undergo brittle fracture under pressure, but will undergo plastic deformation, thus forming a clear and deep indentation. As the tail of the cardboard leaves the working area, the sensor signal disappears, and the controller 6 immediately closes the solenoid valve 53, stops the electrical signal of the high-frequency atomizing nozzle 56, and stops the motor 33, completing one work cycle and waiting for the next cardboard sheet.

[0033] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A corrugated cardboard anti-crack creasing device, characterized in that: The device includes a frame (1), a workbench (2), a crimping section (3), a support (4), a pretreatment section (5), and a controller (6). The workbench (2) is fixed to the frame (1) and extends out from the front and rear ends of the frame (1). The crimping section (3) is fixed to the frame (1) above the workbench (2). Two symmetrically arranged supports (4) are fixed to one end of the frame (1). The pretreatment section (5) is fixed to the support (4). The workbench (2) below the support (4) extends longer than the support (4). The controller (6) is fixed to the upper end of the frame (1). The controller (6) is electrically connected to the crimping section (3) and the pretreatment section (5) respectively.

2. The anti-burst creasing device for corrugated cardboard according to claim 1, characterized in that: The pressing part (3) includes a transverse support plate (31), a pressing roller (32) and a motor (33); two transverse support plates (31) are symmetrically fixed on the frame (1); two pressing rollers (32) are movably connected between the two transverse support plates (31); one end of the pressing roller (32) is fixedly connected to the output end of the motor (33); the motor (33) support is fixedly connected to the frame (1) and electrically connected to the controller (6).

3. The anti-burst creasing device for corrugated cardboard according to claim 2, characterized in that: The pressure roller (32) includes a main shaft (321) and a pressure wheel (322) fixed to the main shaft.

4. The anti-burst creasing device for corrugated cardboard according to claim 3, characterized in that: The workbench (2) is provided with driven wheels (21) located directly below the pressing wheels (322) and corresponding to the number of pressing wheels (322).

5. The anti-burst creasing device for corrugated cardboard according to claim 1, characterized in that: The pretreatment unit (5) includes a water pipe (51), a connecting pipe (52), a solenoid valve (53), a hollow plate (54), a fixing block (55), and a nozzle (56); the water pipe (51) is connected to the connecting pipe (52); the connecting pipe (52) is in the shape of an inverted T; a solenoid valve (53) is provided at the connection between the water pipe (51) and the connecting pipe (52); the solenoid valve (53) is electrically connected to the controller (6); the hollow plate (54) is horizontally fixed between two supports (4); the fixing block (55) is fixed to the connecting pipe (52); the upper end of the connecting pipe (52) extends into the hollow plate (54) and can move relative to the hollow plate (54), and is fixed by the fixing block (55); the lower end of the inverted T-shape is symmetrically and detachably connected to two nozzles (56); the nozzles (56) are electrically connected to the controller (6).

6. The anti-burst creasing device for corrugated cardboard according to claim 5, characterized in that: A booster pump (57) is installed on the water pipe (51).

7. The anti-burst creasing device for corrugated cardboard according to any one of claims 1 to 6, characterized in that: The bracket (4) is provided with a limiting member (7) at the front; the limiting member (7) includes a vertical plate (71) and an inclined plate (72). The upper end of the vertical plate (71) is fixedly connected to the lower end of the bracket (4); the lower end of the inclined plate (72) is fixedly connected to the lower end of the vertical plate (71), and the upper end is fixedly connected to the front end of the bracket (4).

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