Automatic joint splicing system for realizing continuous unwinding of tipping paper reels

Abstract

The utility model discloses an automatic joint splicing system for realizing continuous unwinding of tipping paper reels, which relates to the technical field of winding equipment and comprises an unwinding mechanism and two functional groups, and each functional group consists of a lap joint mechanism and a delayed cutting mechanism. The unwinding mechanism comprises a main shaft, a rotating support, an upper tipping paper winding drum and a lower tipping paper winding drum and can be driven by a servo motor to achieve accurate swinging. A negative pressure adsorption roller of the lap joint mechanism can adjust adsorption force, and a traction cylinder controls tension in a closed-loop mode; the time-delay cutting mechanism is synchronously driven by double cylinders and is matched with a time-delay algorithm to ensure accurate cutting. According to the system, non-stop automatic roll changing is achieved, production efficiency is improved, material waste is reduced, lap joint precision and equipment stability are improved, dependence on the technology of workers is reduced, and the system is suitable for continuous unwinding production of tipping paper of different specifications.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of winding equipment, specifically relates to a joint automatic splicing system of reel paper continuous unwinding. BACKGROUND

[0002] There are two ways when the traditional reel paper printing machine changes the reel, one is to stop and change, and the other is to manually change under the condition of not stopping; The way of stopping and changing has serious raw material waste, high labor intensity, unstable product quality and low production efficiency; And manual change without stopping, the new reel paper joint needs to be connected with the old reel paper moving at high speed, and it is pulled by it, and at the same time, the used old reel paper needs to be cut off quickly, and a series of actions need to be completed in a short time, which completely depends on the personal skill of workers, and has high technical requirements for workers and low reliability.

[0003] To solve this problem, non-manual reel changing devices with limited functions appear in the prior art.

[0004] For example, CN 117864832 A discloses a double-station automatic lap joint unwinding machine, which comprises a rack, a first station and a second station are arranged on the top of the rack, two groups of adsorption lap joint assemblies corresponding to the first station and the second station are arranged in the interior of the rack, the adsorption lap joint assembly comprises two bases symmetrically arranged in the interior of the rack, an adsorption roller moving cylinder is arranged on the top of the same end of each base, an adsorption roller body is arranged between the extension ends of the two adsorption roller moving cylinders, an adsorption roller positioning cylinder is arranged on one of the adsorption roller bodies, and a sawtooth knife cutting assembly is arranged between the extension ends of the two adsorption roller moving cylinders; It can realize continuous production without stopping, and no manual intervention is needed except for sticking adhesive tape and pulling the starting end of the film material to the adsorption roller, and it can be matched with fully automatic equipment; and CN 108147184 A discloses an automatic lap joint machine of a paper coating machine, the paper coating machine comprises a reel machine body, a vertical column arranged in a vertical direction, a connecting beam connected between the reel machine body and the vertical column, and an automatic lap joint machine connected with the reel machine body through the vertical column and the connecting beam, the automatic lap joint machine comprises a paper breaking mechanism hinged at a first end to the vertical column and rotationally connected at a second end to a paper breaking rubber roller, a paper breaking knife fixed to the paper breaking rubber roller, a first cylinder driving the paper breaking mechanism to rotate, a second cylinder driving the paper breaking rubber roller to rotate, and a third cylinder driving the paper breaking knife to cut the paper reel; effectively solve the problem of paper breaking in the production process.

[0005] However, these technical solutions still have some deficiencies and problems in actual application, which may affect production efficiency, lap quality and equipment stability; among them, in CN 117864832 A, if the adsorption roller only controls the adsorption force through mechanical structure, it cannot adapt to the dynamic change of film materials of different materials or thicknesses; and when the double-station switching is performed, if the synchronization of the moving cylinders of the two groups of adsorption rollers is insufficient, the material tension may suddenly change; in addition, in CN 108147184 A, the paper cutting mechanism in the patent relies on the cooperative action of three cylinders, and the compressibility of the gas of the cylinder may cause synchronization error, the pressure control of the paper cutting rubber roller is not accurate, and the application range of the whole device is limited. SUMMARY

[0006] To solve the problem of the continuity of the spool tipping paper in the existing spool, the utility model provides a joint automatic splicing system for realizing the continuous unwinding of the tipping paper spool, realizes the automatic change of the spool of the tipping paper in the printing process without stopping, accurately positions the lap joint part, facilitates accurate lifting during rewinding, and avoids waste.

[0007] The application adopts the following technical scheme: a joint automatic splicing system for realizing the continuous unwinding of the tipping paper spool, characterized by comprising an unwinding mechanism, a lap joint mechanism and a delayed cutting mechanism; wherein the unwinding mechanism is arranged at the most front end of a printing device, one lap joint mechanism and one delayed cutting mechanism constitute one functional group, two functional groups are arranged in close proximity to the unwinding mechanism and are arranged on the upper side and the lower side of the unwinding mechanism respectively.

[0008] The unwinding mechanism comprises a base, bearing seats are arranged at the middle positions of the support walls on the two sides of the base, a main shaft 2 is installed on the bearing seats, and one end of the main shaft 2 is connected with a driving mechanism 3; a rotating support is fixedly arranged on the periphery of the main shaft 2 and comprises two identical cantilever groups arranged at the two ends of the main shaft 2, each cantilever group comprises two cantilevers 4 connected with the main shaft 2 as a connecting point, the two cantilevers 4 of each cantilever group are symmetrically arranged with the main shaft 2 as the center, and the cantilevers 4 of the two cantilever groups correspond to each other to form a symmetrical structure for installing a sectional shaft 5; the sectional shaft 5 is arranged at the end portions of the opposite cantilevers 4 in the two cantilever groups, the sectional shaft 5 adopts a detachable sectional structure for facilitating the installation of the tipping paper reel and the disassembly of the sleeve after the unwinding is completed, and a tipping paper reel is sleeved on the sectional shaft 5; the upper and lower tipping paper reels are driven by the main shaft 2 to swing forward and backward at a fixed angle.

[0009] The rear ends of the upper and lower tipping paper reels are each provided with an unwinding roller group comprising at least two paper guide rollers 6; the unwinding roller group is installed on the unwinding supports on the two sides and is further provided with a delayed cutting mechanism and a lap joint mechanism.

[0010] The delay cutting mechanism includes two groups, which are arranged at the rear of the upper and lower tipping paper rolls and in front of the splicing mechanism; each group includes a connecting seat 7 fixed at both ends of the unwinding support, two drive cylinders 8 installed on the inner side of the connecting seat 7, a clamp 9 fixed at the front end of the extension shaft of the drive cylinder 8, and a cutting knife 10 installed on the clamp 9; in addition, the controller connected with the drive cylinder 8 is further included.

[0011] The splicing mechanism includes two groups, which are arranged adjacently and installed at the rear end of the delay cutting mechanism; each group includes a negative pressure adsorption roller 11 with a circumferential surface horizontally tangent to the roller surface of the paper guide roller 6, and a traction cylinder 12 connected with the negative pressure adsorption roller 11 and controlling the up-down movement thereof; wherein the front-end splicing mechanism is arranged below the corresponding paper guide roller 6 to traction splice the tipping paper of the lower tipping paper roll; and the rear-end splicing mechanism is arranged above the corresponding paper guide roller 6 to traction splice the tipping paper of the upper tipping paper roll.

[0012] Function description of key mechanisms:

[0013] Drive and swing control of the unwinding mechanism: the main shaft 2 is driven by a servo motor, which can accurately control the rotation angle and speed to ensure the position accuracy when the upper and lower rolls swing; the cantilever group of the rotating support adopts a segmented type rotating shaft 5 design, which facilitates the installation of new tipping paper roll and the disassembly of the sleeve after unwinding, while ensuring the stability of the roll when swinging;

[0014] Negative pressure adsorption and traction control of the splicing mechanism: the negative pressure strength of the negative pressure adsorption roller 11 is adjusted in real time by the air pressure regulating valve, which can adapt to tipping paper of different thickness and material, avoiding the falling off of splicing due to insufficient adsorption force or the damage of paper due to excessive adsorption force; the stroke and speed of the traction cylinder 12 are controlled by the controller in a closed loop, which ensures the stability of tension when splicing new and old paper rolls, avoiding the influence of sudden tension change on printing quality;

[0015] Synchronous control of the delay cutting mechanism: the drive cylinder 8 adopts a double-cylinder synchronous drive structure, which ensures the horizontal movement of the cutting knife 10 through the rigid connection of the clamp 9, avoiding the uneven cutting caused by synchronization error of the cylinder;

[0016] The controller has a built-in delay algorithm, which accurately calculates the cutting time according to the conveying speed of the tipping paper and the distance between the workstations of the printing equipment, ensuring that the old paper roll is cut off after the splicing part is completed, avoiding material waste.

[0017] Working process of the automatic splicing system:

[0018] ①The upper and lower tipping paper rolls of the unwinding mechanism, referred to as upper roll and lower roll, are in unwinding state and standby state respectively; the tipping paper is conveyed from the upper roll to the printing equipment through the paper guide roller 6 of the unwinding roller group, at this time the splicing mechanism and the delay cutting mechanism are in standby state.

[0019] ②When the remaining amount of tipping paper on the upper reel reaches the preset value, the control system issues a change of reel instruction; the driving mechanism 3 controls the main shaft 2 to drive the rotating support to swing, so that the lower reel moves to the unwinding work station, and at the same time the upper reel gradually slows down.

[0020] ③A tape is arranged in advance at the joint part of the tipping paper on the lower reel, and the adhesive surface faces the corresponding paper guide roller 6; the traction cylinder 12 of the rear end lap joint mechanism above the paper guide roller 6 drives the negative pressure suction roller 11 to move upwards and align with the roller surface of the paper guide roller 6; the negative pressure suction roller 11 starts the negative pressure suction function to suction the front end of the tipping paper of the lower reel, and at the same time the traction cylinder 12 drives the suction roller to move upwards, so that the joint of the new paper roll is attached to the old paper roll being conveyed by the upper reel.

[0021] ④After the lap joint is completed, the controller triggers the driving cylinder 8 according to the preset time, and the cylinder extension shaft pushes the clamp 9, so that the cutting knife 10 cuts off the old paper roll of the upper reel; at this time, the lower reel has completely taken over the unwinding task, and the change of reel without stopping is realized.

[0022] ⑤When the reel B is close to being used up, the system repeats the above process, drives the main shaft 2 to swing so that the new upper reel after replacement returns to the unwinding work station, and completes the joint splicing through another set of lap joint mechanism and delay cutting mechanism, so that the continuous unwinding is realized. Advantages

[0023] The technical scheme of the present application realizes the continuous unwinding and automatic joint splicing of the tipping paper reel through the innovative design of the unwinding mechanism, the lap joint mechanism and the delay cutting mechanism, and effectively solves the problems of low efficiency and large waste existing in the traditional change of reel.

[0024] The main advantages are as follows:

[0025] ①The change of reel without stopping is realized, and the production efficiency is improved; the system realizes the automatic change of reel without stopping of the tipping paper reel during the printing process through the cooperative work of the upper and lower tipping paper reels; compared with the traditional change of reel without stopping or manual change of reel, the change of reel without stopping avoids the downtime and the tedious manual operation, and improves the production efficiency.

[0026] ②The waste of raw materials is reduced, the lap joint part is accurately positioned, the accurate lifting during rewinding is facilitated, the lap joint misalignment or paper breakage caused by manual operation is avoided, and the waste of raw materials is reduced; the delay cutting mechanism triggers the driving cylinder 8 according to the preset time, so that the lap joint part is cut off after passing through the printing equipment, and the waste of materials is avoided.

[0027] 3. Improve the precision and reliability of the lap joint, the negative pressure strength of the negative pressure suction roller 11 of the lap joint mechanism is adjusted in real time by the air pressure regulating valve, which can adapt to different thickness and material of the tipping paper, avoid the tipping paper from falling off due to insufficient suction force or paper damage due to excessive suction force; the stroke and speed of the traction cylinder 12 are closed-loop controlled by the controller to ensure the stability of the tension when the new and old paper rolls are lapped, reduce the positioning error of the lapped part, and facilitate accurate removal of the lapped section during subsequent rewinding.

[0028] 4. Improve the stability and adaptability of the equipment, the main shaft 2 of the unwinding mechanism is driven by a servo motor, which can accurately control the rotation angle and speed, the cantilever group of the rotating support adopts a segmented shaft 5 design to ensure the stability of the drum during swinging; the driving cylinder 8 of the delay cutting mechanism adopts a double-cylinder synchronous driving structure, which ensures the horizontal movement of the cutting knife 10 through the rigid connection of the clamp 9, avoiding the uneven cutting caused by synchronization error of the cylinder; the system is designed in a modular manner, and the unwinding mechanism, the lapping mechanism and the delay cutting mechanism are independently adjustable, which can adapt to different specifications of the tipping paper roll, solving the problems of tension sudden change and insufficient cutting precision in the prior art, and significantly improving the stability of the equipment.

[0029] 5. Reduce labor intensity and dependence on worker skills, achieve automatic roll changing and joint splicing, without the need for workers to manually replace the roll without stopping, reducing the labor intensity of personnel. Avoid completely relying on the individual skills of workers, improve the reliability and stability of roll changing. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic diagram of the automatic splicing system.

[0031] Figure 2 is a schematic diagram of the internal structure of the automatic splicing system.

[0032] Figure 3 is a schematic diagram of the automatic splicing system before roll changing and splicing according to embodiment 1.

[0033] Figure 4 is a schematic diagram of the automatic splicing system during roll changing and splicing according to embodiment 1.

[0034] Figure 5 is a schematic diagram of the automatic splicing system after roll changing and splicing according to embodiment 1.

[0035] Figure 6 is a schematic diagram of the automatic splicing system before roll changing and splicing according to embodiment 2.

[0036] Figure 7 is a schematic diagram of the automatic splicing system before roll changing and splicing according to embodiment 2.

[0037] Figure 8is the working schematic diagram of the automatic splicing system before roll changing and splicing described in embodiment 2.

[0038] In the figure: support wall 1, main shaft 2, driving mechanism 3, cantilever 4, sectional shaft 5, paper guide roller 6, connecting seat 7, driving cylinder 8, clamp 9, cutting knife 10, negative pressure adsorption roller 11, traction cylinder 12. DETAILED DESCRIPTION

[0039] The utility model is further illustrated below in combination with the drawings and embodiments. EMBODIMENT

[0040] The embodiment provides a joint automatic splicing system for realizing continuous unwinding of a tipping paper reel, is suitable for conventional tipping paper with a thickness of 0.1-0.12mm, and the running speed of the matching printing equipment is 250-350m / min, and the specific structure and working process are as follows:

[0041] I. Structure, refer to Figures 1-2 .

[0042] ①Unwinding mechanism, comprising: main shaft 2, cantilever 4 of rotating support, sectional shaft 5.

[0043] ②Lap joint mechanism, comprising: negative pressure adsorption roller 11, traction cylinder 12.

[0044] ③Time-delay cutting mechanism, comprising: driving cylinder 8, clamp 9, cutting knife 10.

[0045] Working process, refer to Figures 3-5 .

[0046] ①Before roll changing: the upper winding drum is in an unwinding state, the tipping paper is conveyed to the printing equipment through the paper guide roller 6, and the lower winding drum is in a standby state, the front end of the tipping paper of the lower winding drum is previously pasted with a high-temperature-resistant adhesive tape with a width of 20mm, and the adhesive surface faces the paper guide roller; at this time, the lap joint mechanism and the time-delay cutting mechanism are in standby state, and the negative pressure adsorption roller 11 keeps a specific distance with the paper guide roller 6.

[0047] ②During roll changing: when the remaining diameter detection of the upper winding drum reaches a preset value, the control system triggers a roll changing instruction; the servo motor drives the main shaft 2 to drive the rotating support to swing 30° clockwise, the lower winding drum moves to the unwinding station, and the upper winding drum slows down at the same time; the traction cylinder 12 of the rear end lap joint mechanism drives the negative pressure adsorption roller 11 to move upwards and be in contact with the roller surface of the paper guide roller 6, the negative pressure adsorption roller 11 starts to adsorb the front end of the tipping paper of the lower winding drum, and then the traction cylinder 12 drives the adsorption roller to move upwards, so that the joint of the new paper reel is in contact with the old paper reel of the upper winding drum.

[0048] ③After the splicing is completed, the driving cylinder 8 pushes the clamp 9, the cutting knife 10 moves horizontally to cut off the old paper roll of the upper roll; the lower roll starts to unwind, the upper roll is reset to the standby position, and the change of the roll is completed without stopping.

[0049] In this embodiment, the splicing success rate of the conventional tipping paper is high, the tension fluctuation is small, the cutting alignment deviation is less than or equal to 0.5 mm, compared with the traditional manual roll changing, the production efficiency is improved, and the material waste is reduced. Embodiment

[0050] This embodiment is designed for thick tipping paper with a thickness of 0.15-0.2 mm, and the running speed of the matching printing equipment is 150-250 m / min. By optimizing the structure parameters to adapt to the characteristics of thick paper, the specific structure is basically the same as that described in embodiment 1, the difference lies in that the driving motor of the main shaft 2 is upgraded to a larger torque type, the thickness of the cantilever 4 of the rotating bracket is increased, and the diameter of the segmented shaft 5 is increased. In addition, the surface adsorption hole diameter of the negative pressure adsorption roller 11 is expanded, the adsorption force is increased; the stroke of the traction cylinder 12 is increased, the adjustment speed is reduced, and the stretching deformation of the thick paper is avoided; the driving cylinder 8 increases the thrust.

[0051] Working process, reference Figures 6-8 .

[0052] ①Before changing the roll: the upper roll is in the unwinding state, the lower roll is in the standby state, and the front end of the tipping paper is pasted with a 25 mm wide high-strength adhesive tape; when the splicing mechanism is waiting, the negative pressure adsorption roller 11 and the paper guide roller 6 maintain a distance.

[0053] ②During the roll changing: when the remaining diameter of the upper roll reaches the preset value, the main shaft 2 drives the rotating bracket to swing counterclockwise by 35°, the lower roll moves to the unwinding position, and the upper roll slows down; the traction cylinder 12 of the rear end splicing mechanism drives the negative pressure adsorption roller 11 to move upward and adhere to the paper guide roller 6, the negative pressure adsorption roller 11 adsorbs the front end of the thick paper, and then moves upward to adhere the joint of the new paper roll to the old paper roll.

[0054] ③After the roll changing: after the splicing is completed, the driving cylinder 8 pushes the cutting knife 10 to cut off the old paper roll, the lower roll starts to unwind, the upper roll is reset, and the roll changing is completed.

[0055] In this embodiment, the splicing success rate of the thick tipping paper reaches 99.2%, the tension fluctuation is less than or equal to ±8N, the cutting is neat, the problem of "loose splicing and difficult cutting" during manual roll changing of thick paper is solved, the production efficiency is improved, and the material waste is reduced.

[0056] The two embodiments adjust the structure parameters and control logic respectively to adapt to the conventional and thick tipping paper, verify the universality and reliability of the system in the unwinding and splicing of tipping paper with different materials and thicknesses, and can realize automatic roll changing without stopping, improve the production efficiency and quality stability.

Claims

1. A joint automatic splicing system for realizing continuous unwinding of a tipping paper reel, characterized in that, It comprises a unwinding mechanism and two functional groups; The unwinding mechanism is arranged at the front end of the printing device, each functional group is composed of a lap joint mechanism and a time delay cutting mechanism, and the two functional groups are arranged on the upper and lower sides of the unwinding mechanism. The unwinding mechanism comprises a base, bearing seats are arranged at the middle positions of the support walls (1) on both sides of the base, a main shaft (2) is installed on the bearing seat, and the main shaft (2) is connected with a driving mechanism (3) at any end. A rotating support is fixedly arranged on the periphery of the main shaft (2), the rotating support comprises two cantilever groups arranged at the two ends of the main shaft (2), each cantilever group comprises two cantilevers (4) connected with the main shaft (2) as a connecting point, the end portions of the cantilevers (4) opposite to each other in the two cantilever groups are provided with segmented rotating shafts (5), the segmented rotating shafts (5) are sleeved with joint paper roll barrels, and the two joint paper roll barrels are driven by the main shaft (2) to swing forward and backward with a fixed angle. Roll groups are arranged at the rear ends of the two joint paper roll barrels, the roll groups comprise at least two paper guide rollers (6), the roll groups are installed on the roll supports on both sides, and the time delay cutting mechanism and the lap joint mechanism are arranged on the roll supports. The time delay cutting mechanism comprises a connecting seat (7), driving cylinders (8), a clamp (9), a cutting knife (10) and a controller, the connecting seat (7) is fixed at the two ends of the roll support, the driving cylinders (8) are installed on the inner side of the connecting seat (7), the clamp (9) is fixed at the front end of the telescopic shaft of the driving cylinder (8), the cutting knife (10) is installed on the clamp (9), and the controller is connected with the driving cylinder (8). The lap joint mechanism comprises a negative pressure adsorption roller (11) and a traction cylinder (12), the circumferential surface of the negative pressure adsorption roller (11) is horizontally tangent to the roller surface of the paper guide roller (6), and the traction cylinder (12) is connected with the negative pressure adsorption roller (11) to control the up-down movement of the negative pressure adsorption roller (11); wherein the front end lap joint mechanism is arranged below the corresponding paper guide roller (6), and the rear end lap joint mechanism is arranged above the corresponding paper guide roller (6).

2. The joint automatic splicing system for realizing continuous unwinding of a tipping paper reel according to claim 1, characterized in that, The two cantilevers (4) of each cantilever group are symmetrically arranged with the main shaft (2) as the center, and the cantilevers (4) of the two cantilever groups correspond to each other to form a symmetrical structure for installing the segmented rotating shafts (5).

3. The joint automatic splicing system for realizing continuous unwinding of a tipping paper reel according to claim 1, characterized in that, The segmented rotating shafts (5) adopt a detachable segmented structure, which facilitates the installation of the joint paper roll barrels and the disassembly of the sleeves after unwinding.

4. The system of claim 1, wherein, The negative pressure adsorption roller (11) is connected with an air pressure adjusting valve, and the air pressure adjusting valve is used for adjusting the negative pressure intensity of the negative pressure adsorption roller (11) in real time.

5. The system of claim 1, wherein, The stroke and speed of the traction cylinder (12) are closed-loop controlled by the controller to ensure the stability of the tension when the new and old paper rolls are lapped.

6. The system of claim 1, wherein, The joint paper joint parts of the two joint paper roll barrels are provided with adhesive tapes in advance, and the adhesive surfaces of the adhesive tapes face the corresponding paper guide rollers (6).

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