Anti-curvature flattening device in unwinding and slitting process of reel paperboard
By setting up a curl degree detection device and an orthopedic control system during the paper jam unwinding and slitting process, the paper orthopedic status is adjusted in real time, the die-cutting accuracy problem caused by paper jam curl is solved, and production efficiency and product quality are improved.
Patent Information
- Application Number
- CN202422179769.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-06
AI Technical Summary
During the paper jam unwinding process, the paper is decreasing in the die-cut paper feeding accuracy and equipment shutdown due to curling. In the prior art, the transformation of chemical means equipment is large and inflexible, and the adjustment of physical means is lagging and depends on experience.
A curl degree detection device after the paper is cut into single sheets, combined with the real-time linkage of the orthopedic device, provides a fast response control system, including a rolling mechanism, a reflex flattening mechanism and a paper curling angle detection mechanism, to achieve rapid control of the orthopedic state and degree of paper.
It realizes the standardization of the flatness of the paper after slicing, quickly responds to paper curling problems, and improves production efficiency and product quality stability.
Smart Images
Figure CN223087278U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of printing, in particular to an anti-curvature flattening device in the process of unwinding and slitting a reel of cardboard paper. Background Art
[0002] The outer packaging paper of general industrial products is mainly various types of cardboard paper. After printing, the reel-shaped cardboard paper needs to be rewound and slit or cut into single sheets. Under normal circumstances, since the cardboard paper is relatively thick, the bending deformation can quickly rebound in a short time. However, after passing through processes such as printing and hot stamping, the paper absorbs substances such as moisture and solvents on one side, and is wound into a reel shape. After a long time of curling, the paper will undergo plastic deformation, and the single sheets obtained after slitting will be bent, affecting the paper feeding accuracy during die cutting, and even causing the cardboard paper and the equipment to stop, which will also seriously affect subsequent processing procedures such as transportation and packaging.
[0003] To solve the problems that occur during the unwinding and slitting of packaging paper, especially cardboard paper reels, due to paper curling, the solutions in the prior art can be divided into two categories. One is the chemical means solution, that is, the backcoating process is adopted. The device of a color group on the printing machine is transformed, and the paper threading method is adjusted to make the reverse side of the cardboard paper the printing surface, and an anti-curling backcoating liquid is coated on this printing surface. After drying, it acts on the paper surface to correct the curling deformation of the paper. This method is very effective in eliminating paper curling. The backcoating liquid plays a role in making the back side absorb moisture and correcting the paper deformation, and there is a large selection range. However, this method requires special transformation of the equipment, with a large equipment investment, and a single backcoating liquid cannot meet the requirements of multiple types of cardboard paper, and has high requirements for the backcoating liquid.
[0004] Another method is the physical means, that is, the cardboard paper is flattened in the reverse direction of the curling direction through a special mechanism to correct the bending of the paper. For example, CN201420322379.3 provides a printing machine paper curling correction device, including an anti-rolling device and a coating device; the coating device includes an ink supply mechanism, a printing mechanism, and a drying mechanism. Through the anti-rolling device, the paper is corrected by anti-rolling once and corrected by applying the backcoating liquid twice, which can effectively correct the curling deformation of printed papers such as cardboard paper and ensure the printing quality. However, the anti-rolling device described in the solution detects the batch of paper products that have been unwound and slit, and adjusts the next batch of paper according to the curling situation, which has a certain lag; and when adjusting the anti-rolling device, there is no clear data support, and it is entirely operated according to the operator's experience and feeling, and it cannot be adjusted in place quickly, resulting in many unnecessary non-standard papers. Summary of the Invention
[0005] To solve the problems existing in the prior art, the utility model provides an anti-curvature flattening device during the unwinding and slitting of coiled paperboard. By setting a detection device for the curling degree of the paper after being slit into single sheets and linking it with the shaping device in real time, it can respond quickly and implement rapid control over the shaping state and degree of the paper, achieving standardization of the flatness parameter of the paper after slitting; and providing a complete set of rapid detection standards for the curling degree of the paper and a control system matching the rest of the shaping and flattening devices according to the characteristics of the paper.
[0006] One of the invention purposes of the utility model is to provide an anti-curvature flattening device during the unwinding and slitting of coiled paperboard, adopting the following technical solutions:
[0007] An anti-curvature flattening device during the unwinding and slitting of coiled paperboard, characterized in that it is arranged on the equipment for secondary unwinding and slitting of the paperboard that has been printed and wound into a coil, and includes an unwinding mechanism and a transverse cutting mechanism. An anti-curvature flattening mechanism and a paper curling angle detection mechanism are arranged between the unwinding mechanism and the transverse cutting mechanism.
[0008] The unwinding mechanism includes an unwinding roller 1, an infrared probe for detecting the radius of the unwinding reel paper, a motor for controlling the unwinding tension, and a brake.
[0009] The anti-curvature flattening mechanism is located on the side of the vertically movable guide roller 2 arranged at the outlet end of the unwinding roller 1, and includes an anti-curvature roller group 3 parallel to the axis of the guide roller 2 and an orbital disc 4; the anti-curvature roller group 3 consists of two straight rollers with their roller surfaces in contact and their respective rotating shafts 3-1. The rotating shafts 3-1 are respectively connected to the orbital discs 4 arranged at both ends. Two non-through annular tracks 4-1 with the same center but different radii are arranged on the orbital disc 4. The ends of the rotating shafts 3-1 are clamped on the non-through annular tracks 4-1; the two straight rollers of the anti-curvature roller group 3 are connected as a whole through their respective rotating shafts 3-1 and rotate concentrically along their respective corresponding non-through annular tracks 4-1. At the same time, the two straight rollers can rotate independently along their respective rotating shafts 3-1; the initial installation position of the anti-curvature roller group 3 is higher than or equal to the horizontal plane where the guide roller 2 is located; in addition, a detection device for detecting the position and angle of the anti-curvature roller group 3 on the non-through annular track 4-1 and a power device for adjusting the angle of the anti-curvature roller group 3 are arranged outside the two orbital discs 4.
[0010] The transverse cutting mechanism includes a support base and a cutting device; the support base is respectively provided with a raw material rotary conveyor rack 5 and a single-sheet finished paper rotary conveyor rack 6 in the paper traveling direction. The two are on the same horizontal plane and have the same running direction. In addition, a cutting bottom plate 7 is arranged between the raw material rotary conveyor rack 5 and the single-sheet finished paper rotary conveyor rack 6 through a bracket. A cutting opening is arranged in the middle of the cutting bottom plate 7. A roller-shaped cutting knife 8 is arranged above the cutting opening, and a strip-shaped cutting knife 9 is arranged below the cutting opening. The roller-shaped cutting knife 8 and the strip-shaped cutting knife 9 cooperate with each other to cut the unwound paper to a standard length.
[0011] The paper curling angle detection mechanism is arranged behind the transverse cutting mechanism and includes a detection platform 11 parallel to the finished paper conveyor belt 10, and an ejection mechanism 11-5 opposite to the entrance of the detection platform 11 and arranged on the other side of the finished paper conveyor belt 10; for the cut finished papers, they can be detected one by one, at intervals, or randomly.
[0012] The detection platform 11 includes a longitudinal conveyor table 11-1 perpendicular to the direction of the finished paper conveyor belt 10, an upper clamping table 11-2 and a lower clamping table 11-3 installed at the rear of the detection platform 11, and also includes a laser ranging device 11-4 installed at the top of the detection platform 11 and facing downwards and a corresponding control device; the upper clamping table 11-2 and the lower clamping table 11-3 are arranged oppositely, both can be lifted and can contact each other at a specific intermediate height. The longitudinal lengths of the upper clamping table 11-2 and the lower clamping table 11-3 are greater than the length of the finished paper, and the width is equal to 1 / 4 - 1 / 3 of the width of the finished paper; the position of the laser ranging device 11-4 is fixed, and its distances L from the end faces of the upper clamping table 11-2 and the lower clamping table 11-3, and the distance H from the contact surface between the two are both constant.
[0013] Preferably, the power devices for adjusting the angle of the anti-bending roller group 3 and arranged outside the two track discs 4 include a power motor 12, a transmission shaft 13, a transmission disc 14, and a transmission frame 15. The two sets of power devices have exactly the same structure and are symmetrically installed with the midline of the anti-bending roller group 3 as the axis of symmetry; the power motor 12 is installed at the center outside the track disc 4, and its output shaft is connected to the transmission shaft 13 and then extends to the center point of the track disc 4. The transmission disc 14 is sleeved on the transmission shaft 13, and two transmission frames 15 are installed on the transmission disc 14. The transmission frames 15 extend upwards, and their ends are connected to the rotating shafts 3-1 of the two anti-bending roller groups 3 from the outside; when the power motor 12 rotates, it drives the transmission frame 15, driving the rotating shafts 3-1 to rotate within the non-through annular track 4-1, so as to realize the forward or reverse straightening of the paper by the anti-bending roller group 3 within a specific range.
[0014] Preferably, the detection device arranged outside the track disk 4 adopts angle encoder detection or laser probe detection, and is installed on the output shaft of the power motor 12 connected to the center of the track disk 4.
[0015] Preferably, the roller-shaped cutting knife 8 adopts a structure in which the outer peripheral elastic cutting edge cooperates with the inner air-expanding shaft. The inner air-expanding shaft inflates and deflates at a certain frequency to lift and contract the outer peripheral elastic cutting edge; the strip-shaped cutting knife 9 is driven by a pneumatic component to lift and lower it, and the cutting edges of the two contact to cut the paper.
[0016] Preferably, the ejection mechanism 11-5 uses compressed gas to drive a baffle to push the paper or a mechanical energy storage component to push the paper.
[0017] Advantages of the present utility model:
[0018] The flattening device and its control system described in the present utility model can detect the paper online in real time at a certain frequency, quickly feedback the results, and timely control the straightening device to perform corresponding straightening. The detection speed is fast, the straightening range is wide, the control accuracy is high, and the paper curling problem can be processed in a timely and rapid manner, which can ensure the quality stability of the products in the same batch to the greatest extent. Description of the Drawings
[0019] Figure 1 is a schematic structural diagram of the flattening device described in this application.
[0020] Figure 2 is a schematic structural diagram of the reverse curvature flattening mechanism.
[0021] Figure 3 is Figure 2 a partial explosion diagram of
[0022] Figure 4 is a partial enlarged view of the transverse cutting mechanism.
[0023] Figure 5 is a top view of the paper curling angle detection mechanism.
[0024] Figure 6 is a schematic structural diagram of the detection platform.
[0025] Figure 7 is a working state A diagram of the detection platform.
[0026] Figure 8 is a working state B diagram of the detection platform.
[0027] In the figure, there are an unwinding roller 1, a guiding roller 2, a reverse bending roller group 3, a rotating shaft 3-1, an orbital disc 4, a non-through annular orbit 4-1, a raw material rotary conveyor 5, a single-sheet finished paper rotary conveyor 6, a cutting base plate 7, a roller-shaped cutting knife 8, a strip-shaped cutting knife 9, a finished paper conveyor belt 10, a detection platform 11, a longitudinal conveyor 11-1, an upper clamping table 11-2, a lower clamping table 11-3, a laser distance measuring device 11-4, an ejection mechanism 11-5, a power motor 12, a transmission shaft 13, a transmission disc 14, and a transmission frame 15. Detailed implementation mode
[0028] The technical solution of the present utility model will be further described below with reference to the accompanying drawings.
[0029] As Figure 1 、 4 As shown in 5 and 6, the unwinding and cutting of the cardboard outer wrapping reel of the strip-shaped cigarette after printing and bronzing are carried out by using the flattening device and the control system. After cutting is completed, subsequent die-cutting and packaging processes can be carried out.
[0030] Since this reel belongs to the outer packaging of cigarettes, there are many design factors, the pattern combination is complex, the printing area is large, the processes are numerous, and the cardboard itself has a large gram weight. After being wound into a reel, it has a large self-weight, and the force on the stacking position is large, making it easy to deform. In addition, there may be extrusion and collision during the transfer and transportation process. Therefore, the probability of the entire reel curling is high, and there are many curling parts. The curling directions and degrees of each curling part may vary; if the traditional method is used, during the process, the single sheet of paper cut at the end of the process is visually inspected to judge the curling situation, and then the corresponding guide rollers are adjusted during the unwinding process for straightening adjustment. The efficiency is too low, the feedback speed is slow, and there is a serious lag between each step.
[0031] Install the flattening device and the control system described in this embodiment on the corresponding unwinding and cutting equipment, retain the original unwinding mechanism and cutting mechanism, and add a reverse bending and flattening mechanism and a paper curling angle detection mechanism between the unwinding mechanism and the transverse cutting mechanism.
[0032] The reverse bending and flattening mechanism is arranged on the side of the guiding roller 2 that can move up and down at the outlet end of the unwinding roller 1. It includes a reverse bending roller group 3 parallel to the axis of the guiding roller 2. The reverse bending roller group 3 is composed of two straight rollers with their roller surfaces in contact and their respective rotating shafts 3-1. The rotating shafts 3-1 are respectively connected to the orbital discs 4 arranged at both ends. The orbital discs 4 are provided with two non-through annular orbits 4-1 with the same center but different radii. The ends of the rotating shafts 3-1 are clamped on the non-through annular orbits 4-1. The two straight rollers of the reverse bending roller group 3 are connected as a whole through their respective rotating shafts 3-1 and rotate concentrically along their respective non-through annular orbits 4-1. At the same time, the two straight rollers can rotate independently along their respective rotating shafts 3-1;
[0033] In addition, a detection device and a power device are arranged on the outer sides of the two track discs 4 to adjust the angle of the reverse curved roller group 3. There are two sets of power devices with completely the same structure and symmetrically installed with the center line of the reverse curved roller group 3 as the symmetry axis, including a power motor 12, a transmission shaft 13, a transmission disc 14 and a transmission frame 15; the power motor 12 is installed at the center of the outer side of the track disc 4, and its output shaft is connected to the transmission shaft 13 and extends to the center point of the track disc 4. The transmission disc 14 is mounted on the transmission shaft 13, and two transmission frames 15 are installed on the transmission disc 14. The transmission frame 15 extends upward, and its end is connected to the rotating shaft 3-1 of the two reverse curved roller groups 3 from the outside; the power motor 12 rotates, driving the transmission frame 15, driving the rotating shaft 3-1 to rotate in the non-through annular track 4-1, so that the reverse curved roller group 3 pulls the paper to complete the positive or reverse correction within a specific range; the detection device arranged on the outer side of the track disc 4 adopts angle encoder detection or laser probe detection, and is installed on the output shaft of the power motor 12 connected to the center of the track disc 4.
[0034] refer to Figure 2 , 3 In actual application, the height of the initial installation position of the reverse curvature roller group 3 will be slightly higher than the height of the horizontal plane where the guide roller 2 is located, that is, the passing paper will be slightly reversely corrected. Because most printed papers have an ink layer added to the printed surface, it will shrink after drying, and the paper has a tendency to curl toward the side where the printed pattern is set. During the normal unwinding and slitting process, the paper can be flattened by undergoing a slight correction toward the back side; the setting of the initial installation position of the upper reverse curvature roller described in the present application is based on this feature.
[0035] The inverse curved roller group 3 can rotate within a certain angle range along the circular track under the action of the power device. In the four-quadrant coordinate system formed with the center of the track disc 4 as the origin in the side view, the inverse curved roller group 3 is in the first quadrant and the second quadrant, and the paper is reversely corrected toward the side of the printed pattern; the inverse curved roller group 3 is in the third quadrant and the fourth quadrant, and the paper is forwardly corrected toward the back of the printed pattern; since the non-penetrating circular track 4-1 on the track disc 4 is provided with a non-penetrating structure with at least one connection point, therefore, in conjunction with the guide roller 2 that can move up and down, the inverse curved roller group 3 can pull the paper to complete forward and reverse corrections within a range of less than 360°. Compared with the traditional traction roller that can only drive the paper to correct to a limited degree by moving up and down, the correction range and correction accuracy of the paper are greatly improved.
[0036] Also, as described above, for most printed papers, an ink layer is added to the printing surface, which will shrink after drying. Therefore, the paper has a tendency to curl towards the side where the printing pattern is set. Only in a few cases will the printed paper curl towards the back. Therefore, under normal circumstances, the anti-curling roller group 3 rotates and adjusts in the first and second quadrants most of the time to perform reverse straightening on the paper, and less performs forward straightening on the paper.
[0037] The paper curling angle detection mechanism is arranged behind the transverse cutting mechanism and includes a detection platform 11 parallel to the finished paper conveyor belt 10, and an ejection mechanism 11-5 opposite to the entrance of the detection platform 11 and arranged on the other side of the finished paper conveyor belt 10; for the cut finished papers, individual detection, interval detection or random detection can be carried out; the detection platform 11 includes a longitudinal conveyor table 11-1 perpendicular to the direction of the finished paper conveyor belt 10, an upper clamping table 11-2 and a lower clamping table 11-3 installed at the rear of the detection platform 11, and also includes a laser ranging device 11-4 facing downwards and installed at the top of the detection platform 11 and a corresponding control device; the upper clamping table 11-2 and the lower clamping table 11-3 are arranged oppositely, both can be lifted and can contact each other at a specific intermediate height. The longitudinal lengths of the upper clamping table 11-2 and the lower clamping table 11-3 are greater than the length of the finished paper, and the width is equal to 1 / 4 - 1 / 3 of the width of the finished paper; the position of the laser ranging device 11-4 is fixed, and the distances L between it and the end faces of the upper clamping table 11-2 and the lower clamping table 11-3, and the distance H between it and their contact surfaces are both constant.
Claims
1. An anti-curvature flattening device during the unwinding and slitting of coiled paperboard, characterized in that, It is set on the equipment for secondary unwinding and slitting of the cardboard paper that has been printed and wound into a reel, including an unwinding mechanism and a transverse cutting mechanism. An anti-curvature flattening mechanism and a paper curling angle detection mechanism are arranged between the unwinding mechanism and the transverse cutting mechanism; The unwinding mechanism includes an unwinding roller (1), an infrared probe for detecting the radius of the unwind reel paper, a motor for controlling the unwinding tension, and a brake; The anti-curvature flattening mechanism is located on the side of the vertically movable guide roller (2) arranged at the outlet end of the unwinding roller (1), and includes an anti-curvature roller group (3) parallel to the axis of the guide roller (2), and an orbital disc (4); the anti-curvature roller group (3) is composed of two straight rollers with their roller surfaces in contact and their respective rotating shafts (3-1). The rotating shafts (3-1) are respectively connected to the orbital discs (4) arranged at both ends. Two non-through annular tracks (4-1) with the same center but different radii are arranged on the orbital disc (4). The ends of the rotating shafts (3-1) are clamped on the non-through annular tracks (4-1); the two straight rollers of the anti-curvature roller group (3) are connected as a whole through their respective rotating shafts (3-1) and rotate concentrically along their respective corresponding non-through annular tracks (4-1). At the same time, the two straight rollers can rotate independently along their respective rotating shafts (3-1); the initial installation position of the anti-curvature roller group (3) is higher than or equal to the horizontal plane where the guide roller (2) is located; in addition, a detection device for detecting the position and angle of the anti-curvature roller group (3) on the non-through annular track (4-1) and a power device for adjusting the angle of the anti-curvature roller group (3) are arranged outside the two orbital discs (4); The transverse cutting mechanism includes a support base and a cutting device; the support base is respectively provided with a raw material rotary conveyor (5) and a single-sheet finished paper rotary conveyor (6) along the paper running direction. The two are on the same horizontal plane and have the same running direction. In addition, a cutting bottom plate (7) is arranged between the raw material rotary conveyor (5) and the single-sheet finished paper rotary conveyor (6) through a bracket. A cutting opening is arranged in the middle of the cutting bottom plate (7). A roller-shaped cutting knife (8) is arranged above the cutting opening, and a strip-shaped cutting knife (9) is arranged below the cutting opening. The roller-shaped cutting knife (8) and the strip-shaped cutting knife (9) cooperate with each other to cut the unwound paper to a standard length; The paper curling angle detection mechanism is arranged behind the transverse cutting mechanism, and includes a detection platform (11) parallel to the finished paper conveyor belt (10), and an ejection mechanism (11-5) opposite to the entrance of the detection platform (11) and arranged on the other side of the finished paper conveyor belt (10); for the cut finished paper, it can be detected one by one, at intervals, or randomly; The detection platform (11) includes a longitudinal conveying table (11-1) perpendicular to the direction of the finished paper conveyor belt (10), an upper clamping table (11-2) and a lower clamping table (11-3) installed at the rear of the detection platform (11), and further includes a laser ranging device (11-4) facing downward and installed at the top of the detection platform (11) and a corresponding control device; the upper clamping table (11-2) and the lower clamping table (11-3) are arranged oppositely, both can be lifted and can contact each other at a specific intermediate height, the longitudinal lengths of the upper clamping table (11-2) and the lower clamping table (11-3) are greater than the length of the finished paper, and the width is equal to 1 / 4 - 1 / 3 of the width of the finished paper; the position of the laser ranging device (11-4) is fixed, and the distances L from it to the end faces of the upper clamping table (11-2) and the lower clamping table (11-3), as well as the distance H from it to the contact surface between the two are all constant.
2. The anti-curvature flattening device during the unwinding and slitting process of the coiled paperboard according to claim 1, characterized in that, The power device for angle adjustment of the reverse bending roller group (3) arranged outside the two track discs (4) includes a power motor (12), a transmission shaft (13), a transmission disc (14) and a transmission frame (15). The two sets of power devices have exactly the same structure and are symmetrically installed with the midline of the reverse bending roller group (3) as the axis of symmetry; the power motor (12) is installed at the center outside the track disc (4), its output shaft is connected to the transmission shaft (13) and then extends to the center point of the track disc (4). The transmission disc (14) is sleeved on the transmission shaft (13), and two transmission frames (15) are installed on the transmission disc (14). The transmission frames (15) extend upward, and their ends are connected to the rotating shafts (3-1) of the two reverse bending roller groups (3) from the outside; when the power motor (12) rotates, it drives the transmission frame (15), driving the rotating shaft (3-1) to rotate within the non-through annular track (4-1), so as to realize the forward or reverse straightening of the paper by the reverse bending roller group (3) within a specific range.
3. The anti-curvature flattening device during the unwinding and slitting of coiled paperboard according to claim 1 or 2, characterized in that, The detection device arranged outside the track disc (4) uses an angle encoder for detection or a laser probe for detection, and both are installed on the output shaft of the power motor (12) connected to the center of the track disc (4).
4. An anti-curvature flattening device during the unwinding and slitting of coiled paperboard, according to claim 1 or 2, characterized in that The roller-shaped cutting knife (8) adopts a structure in which an outer elastic cutting edge is matched with an inner air expanding shaft. The inner air expanding shaft inflates and deflates at a certain frequency to push up and contract the outer elastic cutting edge; the strip-shaped cutting knife (9) is driven by a pneumatic component to push it up and down. The cutting edges of the two contact to cut the paper.
5. The anti-curvature flattening device during the unwinding and slitting of coiled paperboard according to claim 3, characterized in that, The roller-shaped cutting knife (8) adopts a structure in which an outer elastic cutting edge is matched with an inner air expanding shaft. The inner air expanding shaft inflates and deflates at a certain frequency to push up and contract the outer elastic cutting edge; the strip-shaped cutting knife (9) is driven by a pneumatic component to push it up and down. The cutting edges of the two contact to cut the paper.
6. The anti-curvature flattening device during the unwinding and slitting process of the reel cardboard according to claim 1, wherein, The ejection mechanism (11-5) uses compressed gas to drive a baffle to push the paper or a mechanical energy storage component to push the paper.
Citation Information
Patent Citations
Printing machine paper curl correcting device
CN203888358U