Methods for improving the splicing performance of tipped paper rolls and their application in water absorption testing devices

Abstract

This application relates to the field of tipping paper analysis and testing, and provides a method for improving the splicing performance of tipping paper, including the following steps: ① Process standard formulation: S1. Conduct water absorption tests on cigarette tipping paper; S2. Test tipping papers with different water absorption values ​​on the machine; S3. Determine the appropriate water absorption value range for each tipping paper manufacturer corresponding to each model of cigarette rolling machine; S4. Formulate internal control process standards for tipping paper water absorption value production; S5. Continuously track and adjust, and improve the internal control process standards. ② Actual production stage: S6. Conduct water absorption tests on tipping paper before it is put on the machine; S7. Select the corresponding cigarette rolling machine according to the manufacturer of the tipping paper and the measured water absorption value of the tipping paper, referring to the internal control process standards; S8. Put it on the machine and complete the cigarette rolling operation. Based on this, the splicing quality of tipping paper can be improved and controlled to reduce complaints from downstream customers. In addition, a water absorption testing device applied to this method is also provided.

Description

Technical Field

[0001] This application relates to the field of tipping paper analysis and testing, and in particular to a method for improving the splicing performance of tipping paper and an absorbency testing device for its application. Background Technology

[0002] Tipping paper, also known as "tip paper," is a key specialty paper material in cigarette packaging, specifically used for connecting cigarettes to filters, and occupies an important position in the tobacco industry. The main components of cigarette tipping paper are tipping base paper and printing ink. Among them, tipping base paper, as the main raw material, has a significant impact on the quality of the finished tipping paper.

[0003] When the paper is fed onto the machine and rolled into cigarettes, occasional issues such as wrinkles, curling edges, air leakage, and paper breaks may occur. According to relevant tobacco factory regulations, cigarettes with these quality defects are considered substandard products. Since it is impossible to conduct full inspection during cigarette production, some substandard products will inevitably cause customer complaints when they reach downstream customers, which requires extra attention.

[0004] Analysis revealed two main causes: First, cigarettes exhibiting wrinkled tipping paper, despite having firmly bonded tipping paper, still showed signs of bubbling or folding. This was due to an excessive amount of adhesive on the tipping paper or slow water absorption. The adhesive-coated tipping paper was not dried sufficiently under the equipment's drying conditions, leaving it damp and soft. When this tipping paper was processed on the machine and rubbed, the bond between the tipping paper and the cigarette was insufficient, resulting in deformation. Second, edge curling occurred in the opposite way to wrinkling. This was caused by insufficient adhesive on the tipping paper or rapid water absorption. The adhesive-coated tipping paper was over-dried under the drying conditions, becoming too dry and stiff. This resulted in poor bonding between the tipping paper and the cigarette, leading to localized delamination and edge curling.

[0005] Secondly, air leakage in the tipping paper is caused by poor adhesion between the tipping paper and the cigarette. Thirdly, paper breaks in the tipping paper are due to excessive glue absorption or high water absorption after the tipping paper is fed onto the machine. This excessive moisture reduces the tensile strength of the tipping paper, and sudden changes in machine speed cause a corresponding change in the tipping paper's conveying speed, resulting in vibration and paper breaks. In summary, all of these cigarette quality defects are closely related to the water absorption and glue absorption properties of the tipping paper.

[0006] It is known that tipping base paper is mainly composed of paper fibers, fillers, additives, and pigments. Each component affects the water absorption performance of the tipping base paper, which in turn affects the glue absorption performance of the tipping paper. Since the glue absorption performance and water absorption performance of tipping paper are generally positively correlated, only the water absorption performance needs to be considered. Given the significant correlation between the winding quality and water absorption performance of tipping paper, improving and controlling the winding quality of tipping paper to reduce downstream customer complaints becomes an urgent problem to be solved. Summary of the Invention

[0007] Based on this, this application provides a method for improving the splicing performance of spliced ​​paper and an absorbency testing device for its application, which can improve and control the splicing quality of spliced ​​paper, thereby reducing complaints from downstream customers and enhancing market competitiveness.

[0008] Firstly, the method for improving the splicing performance of spliced ​​paper rolls provided in this application adopts the following technical solution:

[0009] A method for improving the splicing performance of spliced ​​paper rolls includes the following steps:

[0010] ① Process standard setting:

[0011] S1. Conduct water absorption tests on cigarette tipping paper, and collect and analyze the test results in a unified manner;

[0012] S2. Test the tipping paper with different water absorption values ​​on the machine, track the test results of each model of cigarette machine, and record whether there are any splicing defects;

[0013] S3. Through repeated machine tests, the appropriate water absorption range of each tipping paper from each manufacturer on each model of cigarette rolling machine was found.

[0014] S4. Establish internal control process standards for the production of tipping paper with water absorption value, and effectively monitor the water absorption value of tipping paper used on various types of cigarette machines;

[0015] S5. Continuously track the loading status of the splicing paper, promptly report any splicing defects, and adjust and improve the internal control process standards based on the water absorption value recorded when the splicing paper is loaded onto the machine.

[0016] ② Actual production stage:

[0017] S6. Conduct a water absorption test on the cigarette tipping paper used on the machine, record the water absorption value of the tipping paper and keep it on file;

[0018] S7. Based on the manufacturer of the tipping paper and the measured water absorption value of the tipping paper, select the corresponding cigarette machine according to the internal control process standards.

[0019] S8. Start the machine and complete the cigarette rolling process.

[0020] By adopting the above technical solution, when it is known that the splicing performance of tipping paper is related to its water absorption / adhesive absorption, water absorption tests are conducted on different tipping papers to obtain definite water absorption / adhesive absorption performance. This water absorption / adhesive absorption performance is reflected and recorded through specific water absorption values. Then, tipping papers with different water absorption values ​​are tested on the machine to determine the splicing situation of tipping papers produced by different manufacturers with different water absorption values ​​on different cigarette rolling machines. After multiple tests, a suitable range of water absorption values ​​can be determined, and internal control process standards can be obtained.

[0021] In subsequent actual production, by comparing the manufacturer's model with the range of the internal control process standard for the water absorption value of the tipping paper, a suitable cigarette rolling machine can be selected. Performing the rolling operation on the cigarette rolling machine can stabilize the rolling performance of cigarettes, reduce defects such as cigarette curling, wrinkling, and air leakage, improve the adaptability of tipping paper products on the cigarette rolling machine, and thus effectively control the rolling and forming quality of tipping paper, reduce complaints from downstream customers, and improve market competitiveness.

[0022] Optionally, the absorbency test method for tipping paper includes the following steps:

[0023] S61. Test multiple locations on the splice paper, and add 1ul of water to each of the multiple test locations on the splice paper;

[0024] S62. Time the water absorption at each test location separately. Stop timing after the water droplets are absorbed by the splicing paper, and read and record the time taken at each test location.

[0025] S63. Take the average of the test times at each test location, and the resulting time is the water absorption value of the splice paper.

[0026] By adopting the above technical solution, the water absorption / adhesive absorption performance of the tipping paper can be visualized by quantitatively measuring the time it takes for 1 μL of water to be completely absorbed by the tipping paper, so that operators can effectively control the splicing performance of the tipping paper.

[0027] Secondly, the water absorption testing device provided in this application adopts the following technical solution:

[0028] A water absorption testing device includes a base assembly, the base assembly being provided with a pressing unit for fixing the splice paper, a dripping unit for dripping water onto the splice paper, and an imaging unit for measuring the water absorption value of the splice paper.

[0029] The pressing unit includes a fixed mold base and two sets of first pressing mechanisms. The fixed mold base is fixed to the base assembly and has a first channel for receiving paper to enter. The two sets of first pressing mechanisms are spaced apart and respectively face the two ends of the first channel.

[0030] The first pressing mechanism includes a first base platform fixed to the fixed mold base and a first pressing platform movably disposed above the first base platform. The first base platform is provided with a plurality of first rollers that partially protrude from the top surface of the first base platform, and the first pressing platform is provided with a plurality of second rollers that partially protrude from the bottom surface of the first pressing platform. In the initial state, each second roller abuts against each of the first rollers respectively.

[0031] By adopting the above technical solution, when conducting the water absorption test of the tipping paper, the tipping paper is inserted into the first channel of the fixed mold base, and the tipping paper enters between the first base platform and the first pressing platform. The contact action of the first roller and the second roller can press and position the tipping paper. Then, a fixed amount of 1 μL of water is added to the tipping paper through the dripping unit. The time it takes for the tipping paper to completely absorb the 1 μL of water is observed and recorded by the imaging unit. The water absorption value of the tipping paper can be obtained conveniently and quickly, so as to facilitate subsequent comparison with the internal control process standards, and to perform machine winding and quality control of the tipping paper.

[0032] Optionally, the pressing unit also includes a movable mold base that is vertically slidably disposed on the base assembly and two sets of second pressing mechanisms fixed to the base assembly. The movable mold base abuts against the side of the fixed mold base. The movable mold base is provided with a second channel for receiving and loading paper to enter. The two sets of second pressing mechanisms are spaced apart and respectively facing the two ends of the second channel.

[0033] The first channel includes a first straight segment and a first curved segment connected thereto; the second channel includes a second straight segment and a second curved segment connected thereto; the extension direction of the first curved segment is opposite to the extension direction of the second curved segment; the moving mold base is provided with a positioning mechanism for positioning; in the first use state, the first straight segment and the second straight segment are directly connected, and the first curved segment and the second curved segment are misaligned; in the second use state, the first curved segment and the second curved segment are partially directly connected, and the first straight segment and the second straight segment are misaligned, so that the first channel and the second channel together enclose and form a U-shaped shape.

[0034] By adopting the above technical solution, when performing absorbency tests on tipping paper, it is sometimes necessary to measure the absorbency value of one side, and sometimes it is necessary to measure the absorbency value of both sides separately. This application, by setting a moving mold base and a second pressing mechanism, allows the first straight segment and the second straight segment to be directly connected in the first use state, enabling the tipping paper to enter normally for single-sided absorbency testing. In addition, in the second use state, the moving mold base moves downward relative to the fixed mold base and is fixed in position by the positioning mechanism. At this time, the first channel and the second channel can be combined to form a U-shape, and the tipping paper can be correspondingly rolled into a U-shape and enter the first channel and the second channel. At this time, the dripping mechanism can simultaneously perform absorbency tests on both sides of the tipping paper, quickly complete the test and record the test results, which is beneficial for subsequent on-machine winding and splicing operations.

[0035] Optionally, the positioning mechanism includes a fixed base plate fixed to the moving mold base, a limiting block movably connected to the fixed base plate, and a first spring disposed between the limiting block and the fixed base plate. The first spring normally forces the limiting block away from the fixed base plate and exposes it on the moving mold base. A limiting slot is provided on the side of the fixed mold base near the moving mold base. In the first use state, the limiting block is matched and inserted into the limiting slot. In the second use state, the limiting block abuts against the bottom surface of the fixed mold base.

[0036] By adopting the above technical solution, the setting of the first spring allows the limiting plug to be normally exposed to the moving mold base, so that the limiting plug can be smoothly inserted and positioned with the limiting slot in the first use state, while in the second use state, the moving mold base can abut against the bottom of the limiting plug to ensure the normal use of the water absorption test device.

[0037] Optionally, the base assembly is fixed to the top of a mounting stand, and the second pressing mechanism includes a second base platform fixed to the mounting stand and a second pressing platform movably disposed above the second base platform; both the first pressing platform and the second pressing platform are fixedly connected to inclined guide posts, and the mounting stand is provided with inclined guide grooves, with each inclined guide post being matched and inserted into each inclined guide groove respectively.

[0038] All the inclined guide posts are connected to the operating component. The operating component is normally in contact with the mounting base, and at this time the second roller is normally in contact with the first roller. The mounting base is equipped with a retaining mechanism. After the operating component moves outward, the retaining mechanism is used to maintain its position. At this time, the second roller and the first roller are spaced apart.

[0039] By adopting the above technical solution, when conducting the water absorption test, the operator can hold the operating component to force each pressing platform to move towards the mounting base. At this time, the cooperation of the inclined guide post and the inclined guide groove can make each pressing platform move upward a certain distance, and the position is maintained by the holding mechanism, which facilitates the paper to enter between the first roller and the second roller through the first channel. Then, by forcing the holding mechanism to reset to release the position restriction of the operating component, each pressing platform can automatically move downward under its own gravity, so that the second roller moves towards the first roller and presses and positions the paper.

[0040] Optionally, the retaining mechanism includes a mechanism box fixed to the mounting base, a plug plate movably installed inside the mechanism box, and a second spring disposed between the plug plate and the mechanism box; wherein, the plug plate passes through the mechanism box and is partially exposed outside the mechanism box, and in the initial state, the plug plate normally abuts against the operating member; when the operating member moves away from the mounting base, the plug plate enters between the operating member and the mounting base.

[0041] By adopting the above technical solution, after the operating component moves away from the mounting base, the plug plate can automatically enter between the operating component and the mounting base under the elastic force of the second spring, thereby restricting the retraction of the operating component and keeping the first roller and the second roller at a distance; after the receiving paper enters between the first roller and the second roller, by moving the plug plate away from the area between the operating component and the mounting base, the operating component can move back towards the mounting base under the action of gravity.

[0042] Optionally, the dripping unit includes two dripping mechanisms, which are fixedly mounted on the fixed mold base and the moving mold base, respectively. Each dripping mechanism includes a fixed support rod, multiple dripping tubes detachably connected to the support rod, and a drive mechanism for driving the dripping tubes to move together. The outer circumference of each dripping tube is connected to a flexible tube through a one-way valve, and all the flexible tubes are connected to the liquid storage bottle.

[0043] The drip tube has a needle at its bottom and a rotating seat at its top, with a drive mechanism to rotate the rotating seat. A piston rod is inserted inside the drip tube, with a sealing end at its bottom, the outer diameter of which matches the inner diameter of the drip tube. A contact plate is located at the top of the piston rod, and the contact plate is inclined to contact the rotating seat. A third spring is located between the piston rod and the drip tube, forcing the contact plate to remain in contact with the rotating seat.

[0044] By adopting the above technical solution, the hose of this application is connected to the drip tube via a one-way valve for unidirectional water delivery to the drip tube. During the absorbency test, the third spring normally forces the rotating seat and the abutment plate to tilt and abut. When the drive mechanism is activated to drive each rotating seat to rotate, the rotating seat can gradually force the abutment plate to move downward, thereby compressing the liquid storage space inside the drip tube, causing water to be squeezed out through the syringe and drip onto the splice paper for the absorbency test. Afterward, the drive mechanism resets, and the elastic force of the third spring acting on the abutment plate forces the abutment plate to move upward, thereby causing the mounting seat to reset and rotate to a state of tilted abutment with the abutment plate. At this time, the liquid storage space inside the drip tube gradually increases, and water can enter the hose from the storage bottle and enter the storage space through the one-way valve, so as to facilitate the next absorbency test of the splice paper.

[0045] Optionally, the drive mechanism includes a winch that is fixedly installed, a rope reel connected to the output end of the winch, and a take-up rope with one end fixed to the rope reel, the end of the take-up rope away from the turntable being fixedly installed.

[0046] Each rotating seat has an extension at its top with slots through which a pull rope is threaded. In the initial state, the abutment plate and the rotating seat are in inclined contact, and the pull rope is in a slack state. When the pull rope is stretched, it forces the rotating seat to rotate, thereby moving the abutment plate downward.

[0047] By adopting the above technical solution, the pull rope is sequentially threaded through the slots of each extension. When the abutment plate and the rotating seat are reset to the inclined abutment state, the pull rope is in a slack state. When a water absorption test is required, the winch is controlled to wind up the pull rope. As the pull rope gradually tightens, it can drive each extension to rotate, thereby forcing the abutment plate to gradually move downward under the abutment push of the rotating seat, so as to squeeze the dripping tube to drip.

[0048] Optionally, the imaging unit includes a first camera fixedly mounted on the first pressing mechanism, a second camera fixedly mounted on the second pressing mechanism, and an industrial control computer that is communicatively connected to the first camera and the second camera.

[0049] By adopting the above technical solution, the first camera and the second camera are set to capture the water absorption of both sides of the spliced ​​paper respectively. The captured images are transmitted to the industrial control computer, which can be inspected and judged by the operator or automatically analyzed and judged by the industrial control computer software to obtain the water absorption time required for the test and calculate the water absorption value.

[0050] In summary, this application includes at least one of the following beneficial technical effects:

[0051] 1. This application obtains a suitable water absorption value range through multiple tests and analyses, and determines the internal control process standard. In subsequent actual production, by comparing the manufacturer's model and the range of the internal control process standard where the water absorption value of the tipping paper falls, a suitable cigarette rolling machine can be selected. Performing the rolling operation on the cigarette rolling machine can stabilize the rolling performance of cigarettes, reduce defects such as cigarette edge curling, wrinkling, and air leakage, and thus effectively control the rolling and forming quality of the tipping paper.

[0052] 2. By measuring the time it takes for 1 μL of water to be completely absorbed by the tipping paper, the water absorption / adhesive absorption properties of the tipping paper can be visualized, so that operators can effectively control the splicing performance of the tipping paper.

[0053] 3. By setting up a water absorption test device, the water absorption value of the splicing paper can be obtained conveniently and quickly. It is also suitable for single and double-sided water absorption tests of the splicing paper, which facilitates subsequent referencing of internal control process standards for splicing and quality control of the splicing paper. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the overall structure of the water absorption testing device in this embodiment when used for single-sided testing;

[0055] Figure 2 This is a front view of the fixed mold base and the moving mold base when the water absorption testing device is used for double-sided testing in this embodiment;

[0056] Figure 3 This is a schematic diagram of the positioning mechanism in this embodiment;

[0057] Figure 4 This is a schematic diagram of the overall structure of the water absorption testing device in this embodiment when used for double-sided testing;

[0058] Figure 5 This is a half-sectional structural diagram of the mounting base in this embodiment, mainly showing the cooperation relationship between the inclined guide column and the inclined guide groove;

[0059] Figure 6 yes Figure 5 Enlarged view of point A in the middle;

[0060] Figure 7 This is a schematic diagram of the overall structure of the water absorption testing device in this embodiment when it is used for double-sided testing from another direction;

[0061] Figure 8 yes Figure 7 Enlarged view of point B in the middle;

[0062] Figure 9 This is a half-sectional view of the drip tube in this embodiment.

[0063] Explanation of reference numerals in the attached drawings: 1. Base assembly; 2. Pressing unit; 21. Fixed mold base; 211. First fixed mold; 212. Second fixed mold; 213. First channel; 214. First straight segment; 215. First curved segment; 216. Limiting slot; 22. First pressing mechanism; 221. First base platform; 222. First pressing platform; 223. First roller; 224. Second roller;

[0064] 23. Moving mold base; 231. First moving mold; 232. Second moving mold; 233. Second channel; 234. Second straight segment; 235. Second curved segment; 236. Guide column; 24. Second pressing mechanism; 241. Second base platform; 242. Second pressing platform; 25. Positioning mechanism; 251. Fixed base plate; 252. Limiting block; 253. First spring; 254. Movable insert; 255. Handle rod; 26. Inclined guide post; 261. Operating component;

[0065] 3. Drip unit; 31. Support rod; 32. Drip tube; 321. Needle; 322. Rotating seat; 3221. Extension; 3222. Groove; 323. Piston rod; 324. Sealing end; 325. Abutment plate; 326. Third spring; 327. First inclined platform; 328. Second inclined platform; 329. One-way valve; 33. Drive mechanism; 331. Winch; 332. Rope reel; 333. Retracting rope; 34. Hose;

[0066] 4. Imaging unit; 41. First camera; 42. Second camera; 5. Mounting stand; 51. Inclined guide groove; 52. Holding mechanism; 521. Mechanism box; 522. Connecting plate; 523. Second spring; 524. Actuating part. Detailed Implementation

[0067] The following is in conjunction with the appendix Figure 1 - Appendix Figure 9 This application will be described in further detail. Example 1

[0068] This application discloses a method for improving the splicing performance of spliced ​​paper rolls.

[0069] A method for improving the splicing performance of spliced ​​paper rolls specifically includes the following steps:

[0070] ① Process standard setting:

[0071] S1. Conduct a water absorption test on cigarette tipping paper, and collect and analyze the test results.

[0072] S2. Test the tipping paper with different water absorption values ​​on the machine, track the test results of each model of cigarette machine, and record whether there are any splicing defects.

[0073] S3. Through repeated machine tests, the appropriate water absorption range of each tipping paper from each manufacturer for each model of cigarette machine was found, thereby achieving a virtuous cycle, improving the applicability of tipping paper to the machine, and ultimately improving the efficiency and quality of cigarette production.

[0074] S4. Establish internal control process standards for the production of tipping paper water absorption value, effectively monitor the water absorption value of tipping paper used on each type of cigarette machine, and ensure that the actual water absorption value of tipping paper falls within the range of the internal control process standards when it is put into operation.

[0075] S5. Continuously track the loading status of the splicing paper, promptly report any splicing defects, and adjust and improve the internal control process standards based on the water absorption value recorded when the splicing paper is loaded onto the machine.

[0076] ② Actual production stage:

[0077] S6. Before using the machine, conduct a water absorption test on the cigarette tipping paper used in the machine, record the water absorption value of the tipping paper and keep it on file; the water absorption test specifically includes the following steps.

[0078] S61. Test multiple locations on the splice paper, add 1ul (1 microliter) of water to each test location on the splice paper, and let stand.

[0079] S62. Observe and time the water absorption at each test position. Stop timing after the water droplets are absorbed by the splicing paper, and read and record the time taken at each test position.

[0080] S63. Take the average of the test times at each test location, and the resulting time can be considered as the water absorption value of the splicing paper.

[0081] S7. Based on the manufacturer of the tipping paper and the measured water absorption value of the tipping paper, and in accordance with the internal control process standards and the temperature settings and gluing methods of the splicing heating system of each type of cigarette machine, select the corresponding cigarette machine to ensure the stability of product quality and machine adaptability.

[0082] S8. Start the machine and use the selected cigarette rolling machine to complete the cigarette rolling operation with paper feeding.

[0083] The implementation principle of Embodiment 1 of this application is as follows:

[0084] In actual production, by comparing the manufacturer's model and the range of water absorption value of the tipping paper, a suitable cigarette rolling machine can be selected. Performing the corresponding tipping paper rolling operation on the cigarette rolling machine can stabilize the cigarette rolling performance, reduce defects such as cigarette edge curling, wrinkling, and air leakage, improve the adaptability of tipping paper products on the cigarette rolling machine, and thus effectively control the rolling and forming quality of tipping paper, reduce downstream customer complaints, and improve market competitiveness. Example 2

[0085] This application discloses a method for improving the splicing performance of spliced ​​paper rolls.

[0086] Reference Figure 1 A water absorption testing device includes a base assembly 1. The base assembly 1 is provided with a pressing unit 2 for fixing the splice paper, a dripping unit 3 for dripping water onto the splice paper, and an imaging unit 4 for measuring the water absorption value of the splice paper. The pressing unit 2 includes a fixed mold base 21, a first pressing mechanism 22, a movable mold base 23, and a second pressing mechanism 24. The fixed mold base 21 is fixed to the top surface of the base assembly 1, and the movable mold base 23 is vertically slidably mounted on the base assembly 1 through a vertically arranged guide column 236.

[0087] Reference Figure 2 The fixed mold base 21 specifically includes a first fixed mold 211 and a second fixed mold 212. The first fixed mold 211 and the second fixed mold 212 are fixedly connected and are spaced apart from each other to form a first channel 213. In this embodiment, the first channel 213 includes a first straight segment 214 and a first curved segment 215 connected to its end. The end of the first straight segment 214 away from the first curved segment extends to the side of the fixed mold base 21, and the end of the first curved segment 215 away from the first straight segment 214 extends downward and extends to the bottom surface of the fixed mold base 21.

[0088] Furthermore, the moving mold base 23 specifically includes a first moving mold 231 and a second moving mold 232 fixedly connected thereto. The first moving mold 231 and the second moving mold 232 are spaced apart from each other and form a second channel 233. In this embodiment, the second channel 233 includes a second straight segment 234 and a second curved segment 235 connected to its end. The end of the second straight segment 234 away from the second curved segment 235 extends to the side of the moving mold base 23, and the end of the second curved segment 235 away from the second straight segment 234 extends upward and extends to the top surface of the moving mold base 23. As can be seen from the above, the extension direction of the second curved segment 235 is opposite to the extension direction of the first curved segment 215.

[0089] Back Figure 1 The moving mold base 23 has a positioning mechanism 25 on its side for positioning; see details. Figure 3 The positioning mechanism 25 includes a fixed base plate 251, a limiting plug 252, and a first spring 253. The fixed base plate 251 is fixed to the moving mold base 23, and a plurality of movable insertion holes are provided through the side of the fixed base plate 251. The limiting plug 252 is slidably installed on the moving mold base 23, and a plurality of movable pins 254 are fixedly connected to the side of the limiting plug 252. The movable pins 254 are matched and inserted into the movable insertion holes and can move axially within the movable insertion holes. All the ends of the movable pins 254 are jointly equipped with a handle 255. The first spring 253 is sleeved on the movable pins 254, and one end of the first spring 253 abuts against the fixed base plate 251, and the other end abuts against the limiting plug 252. The first spring 253 can always generate an elastic force acting on the limiting plug 252, thereby forcing the limiting plug 252 to move away from the fixed base plate 251 and protrude from the moving mold base 23.

[0090] The fixed mold base 21 has a limiting slot 216 on its side near the moving mold base 23. The shape of the limiting slot 216 is the same as the shape of the limiting groove block, so that the limiting insert block 252 can be matched and inserted into the limiting slot 216. (See also...) Figure 2 It should be noted that the absorbency test of the tipping paper may be performed on one side or both sides. In the first use state, the limiting block 252 is positioned directly opposite the limiting slot 216. Under the elastic force of the first spring 253, the limiting block 252 can be matched and inserted into the limiting slot 216, thereby keeping the moving mold base 23 fixed. At this time, the first straight segment 214 and the second straight segment 234 are directly connected, and the tipping paper can be inserted into the first straight segment 214 and the second straight segment 234, so that the absorbency test device can perform a single-sided absorbency test.

[0091] Furthermore, in the second usage state, the moving mold base 23 moves downward under its own weight until it abuts against the top surface of the base assembly 1. At this time, the limiting block 252 can abut against the bottom surface of the fixed mold base 21, thereby restricting the movement of the moving mold base 23 and keeping it fixed. At this time, the first straight segment 214 and the second straight segment 234 are misaligned, while the first curved segment 215 and the second curved segment 235 are partially aligned and connected, so that the first channel 213 and the second channel 233 together form a U-shape. Based on this, by bending the tipping paper into a U-shape, the tipping paper can be inserted into the first channel 213 and the second channel 233, so that the absorbency testing device can perform double-sided absorbency testing simultaneously.

[0092] Reference Figure 4 There are two sets of first pressing mechanisms 22, which are spaced apart and directly opposite the two ends of the first straight segment 214. The first pressing mechanism 22 includes a first base platform 221 and a first pressing platform 222. A mounting base 5 is fixed to the top surface of the base assembly 1, and the first base platform 221 is fixedly connected to the mounting base 5, thereby fixing the first base platform 221 on the base assembly 1. The first base platform 221 has a plurality of freely rotating first rollers 223 inside, all of which are equidistantly arranged along the extension direction of the first base platform 221, and each first roller 223 partially protrudes from the top surface of the first base platform 221.

[0093] The first pressing platform 222 is movably disposed above the first base platform 221, and the first pressing platform 222 has a plurality of freely rotating second rollers 224 built in it. All the second rollers 224 are equidistantly arranged along the extension direction of the first pressing platform 222, and each second roller 224 protrudes partially from the bottom surface of the second base platform 241. In the initial state, the first pressing platform 222 can automatically move downward under its own gravity, so that the second rollers 224 are normally abutting against the first rollers 223 for pressing and positioning the paper.

[0094] Two sets of second pressing mechanisms 24 are provided, with the two sets of second pressing mechanisms 24 spaced apart and located directly below the two sets of first pressing mechanisms 22. In the second use state, the two sets of second pressing mechanisms 24 can be directly opposite the two ends of the second straight segment 234. In this embodiment, the second pressing mechanism 24 includes a second base platform 241 fixed to the base assembly 1 and a second pressing platform 242 movably disposed above the second base platform 241. The specific structural design of the second pressing mechanism 24 is the same as that of the first pressing mechanism 22, and will not be described in detail here. The second pressing mechanism 24 is used to work together with the first pressing mechanism 22 to press and position the U-shaped splice paper.

[0095] Reference Figure 5An inclined guide post 26 is fixed on the side of the first pressing platform 222 away from the fixed mold base 21 and the side of the second pressing platform 242 away from the fixed mold base 21. The inclined guide post 26 extends upward at an angle from one end close to the first pressing platform 222 / second pressing platform 242 to the other end. The mounting base 5 is provided with an inclined guide groove 51. Each inclined guide post 26 is respectively matched and inserted into the respective inclined guide groove 51, and the inclined guide post 26 can move within the inclined guide groove 51. All the inclined guide posts 26 are connected to the operating member 261 on the side away from the first pressing platform 222 / second pressing platform 242. The operating member 261 is located on the side of the mounting base 5 away from the first pressing platform 222 / second pressing platform 242. When the first pressing platform 222 and the second pressing platform 242 are subjected to gravity, the inclined guide posts 26 move downward along the inclined guide groove 51, and the operating member 261 eventually naturally abuts against the mounting base 5, so that the second roller 224 naturally abuts against the first roller 223.

[0096] Reference Figure 6 The mounting base 5 is also provided with a retaining mechanism 52, which includes a mechanism box 521, a plug-in plate 522, and a second spring 523. The mechanism box 521 is fixed to the mounting base 5. The interior of the mechanism box 521 is provided with a movable space, and the side of the mechanism box 521 is provided with a connecting port connected to the movable space. The plug-in plate 522 is movably installed inside the movable space, and the second spring 523 is provided inside the movable space. One end of the second spring 523 abuts against the inner wall of the movable space, and the other end abuts against the side of the plug-in plate 522. The second spring 523 can always generate an elastic force acting on the plug-in plate 522, thereby forcing the plug-in plate 522 to pass through the connecting port and be partially exposed outside the mechanism box 521.

[0097] It should be noted that the communication port of the mechanism box 521 is directly opposite the operating member 261. When the operator acts on the operating member 261 and forces it to move away from the mounting base 5, the plug plate 522 can automatically enter between the operating member 261 and the mounting base 5 under the elastic force of the second spring 523, restricting the resetting and retraction of the operating member 261, thereby maintaining the position of the first pressing platform 222 and the second pressing platform 242, and keeping the first roller 223 and the second roller 224 spaced apart, so that the paper can be dispensed into the area between the first roller 223 and the second roller 224.

[0098] In addition, the side of the connector plate 522 is provided with an integrally formed actuating part 524, and the side of the mechanism box 521 is provided with a structural groove communicating with the movable space. The actuating part 524 can pass through the structural groove and be exposed in the mechanism box 521. When the paper enters the area between the first roller 223 and the second roller 224, the operator can act on the actuating part 524 to force the connector plate 522 to disengage from the area between the operating member 261 and the mounting base 5. At this time, the operating member 261 can move towards the mounting base 5 under the action of gravity, so that the second roller 224 can smoothly abut against the first roller 223 to press and position the paper.

[0099] Reference Figure 7 The dripping unit 3 includes two dripping mechanisms, which are fixedly mounted on the fixed mold base 21 and the moving mold base 23, respectively. It should be noted that in the first operating state, both dripping units 3 are located above the first pressing mechanism 22, enabling them to jointly test the water absorption of the paper. In the second operating state, the dripping unit 3 fixed to the moving mold base 23 can move to below the first pressing mechanism 22 and above the second pressing mechanism 24. At this time, the two dripping units 3 can drip water onto both sides of the paper separately to quickly obtain the water absorption value of both sides of the paper.

[0100] Simultaneously refer to Figure 8 The dripping mechanism includes a support rod 31, dripping tubes 32, and a drive mechanism 33. The support rod 31 is fixedly mounted on a fixed mold base 21 or a moving mold base 23. The support rod 31 has multiple mounting slots, all of which are equidistantly arranged along the axial direction of the support rod 31. Multiple dripping tubes 32 are provided, each corresponding to a specific mounting slot. The outer circumference of each dripping tube 32 is connected to a flexible tube 34 via a one-way valve 329. All flexible tubes 34 are connected externally to a storage bottle, enabling unidirectional water delivery to the storage space inside the dripping tube 32.

[0101] Specific reference Figure 9 The drip tube 32 has a needle 321 at its bottom and a rotating seat 322 rotatably mounted at its top. A piston rod 323 is movably inserted inside the drip tube 32, and an integrally formed sealing end 324 is provided at the bottom of the piston rod 323. The outer diameter of the sealing end 324 is equal to the inner diameter of the drip tube 32, allowing a sealed liquid storage space to be formed between the sealing end 324 and the inner bottom wall of the drip tube 32. In this embodiment, the piston rod 323 has a rectangular cross-sectional shape. A baffle is provided inside the drip tube 32 for the piston rod 323 to pass through, thus restricting the rotation of the piston rod 323 to a position along the axis of the drip tube 32. An integrally formed abutment plate 325 is provided at the end of the piston rod 323 away from the sealing end 324.

[0102] In addition, a third spring 326 is provided between the piston rod 323 and the drip tube 32. One end of the third spring 326 abuts against the abutment plate 325, and the other end abuts against the baffle. The third spring 326 can always generate an elastic force acting on the abutment plate 325, thereby forcing the abutment plate 325 to be in constant contact with the rotating seat 322. It should be noted that the bottom of the rotating seat 322 is provided with an integrally formed first inclined platform 327, and the top of the abutment plate 325 is provided with an integrally formed second inclined platform 328. In the initial state, the inclined surface of the first inclined platform 327 can be inclined to abut against the inclined surface of the second inclined platform 328.

[0103] Simultaneously refer to Figure 8 All dripping tubes 32 located in the same group of dripping mechanisms are driven to rotate by a drive mechanism 33. The drive mechanism 33 includes a winch 331, a rope reel 332, and a take-up rope 333. The winch 331 is fixed to the mounting base 5, and the rope reel 332 is fixedly installed at the output end of the winch 331. One end of the take-up rope 333 is fixedly connected to the rope reel 332, and the other end is fixedly connected to the fixed mold base 21 / moving mold base 23. Each rotating base 322 has an integrally formed extension 3221 on its top. The extension 3221 has a transverse through slot 3222, through which the take-up rope 333 can be sequentially passed.

[0104] In the initial state, when the contact plate 325 and the rotating seat 322 are tilted together, the orientation of each slot 3222 is tilted outward, and the pull rope 333 is in a slack state. When a certain amount of water needs to be added to the splice paper, the winch 331 is controlled to rotate to wind up the pull rope 333. After the pull rope 333 is gradually tightened, it can drive the slots 3222 of each extension 3221 to rotate to face each other, thereby forcing the rotating seat 322 to rotate circumferentially. At this time, by utilizing the tilted contact between the rotating seat 322 and the contact plate 325, the contact plate 325 can be driven to move downward along the axis of the drip tube 32, thereby squeezing the liquid storage space inside the drip tube 32. The water stored in the liquid storage space can drip onto the splice paper through the syringe to successfully conduct the water absorption test of the splice paper.

[0105] Then, by resetting the winch 331, the pull rope 333 gradually returns to a slack state. The abutment plate 325 can move upward and reset under the elastic force of the third spring 326. The tilting contact between the first inclined platform 327 and the second inclined platform 328 can cause the rotating seat 322 to rotate and reset, so that water can be added back into the liquid storage space through the one-way valve 329, which is beneficial for the next water absorption test.

[0106] It should be noted that, considering that the liquid storage space inside the drip tube 32 is normally kept sealed, the resistance is high when the abutment plate 325 moves upward to reset. It may not be possible to smoothly reset the rotating seat 322 by the elastic force of the third spring 326 alone. According to the actual use, in order to ensure the smooth rotation and reset of the rotating seat 322, the one-way valve 329 can be set as an elastic core. At the same time, a power pump can be added between each hose 34 and the liquid storage bottle. The power pump pumps liquid into the drip tube. The pumping force of the power pump and the elastic force of the third spring 326 can jointly force the abutment plate 325 to move upward, so as to realize the rotation and reset of the rotating seat 322.

[0107] Back Figure 7 , Figure 8 The imaging unit 4 includes a first camera 41, a second camera 42, and an industrial control computer. The first camera 41 is fixedly mounted on the mounting base 5, and the second camera 42 is fixedly mounted on the second base platform 241. Both the first camera 41 and the second camera 42 are simultaneously connected to the industrial control computer. It can be understood that during a single-sided test of the spliced ​​paper, the second camera 42 can capture images in real time and read the absorbency value. During a double-sided test of the spliced ​​paper, the first camera 41 and the second camera 42 can capture images of both sides respectively and read the values.

[0108] Taking a single-sided test as an example, when the water absorption test device is in use, the second camera 42 can capture the area between the first pressing mechanism 22 and the second pressing mechanism 24, and transmit the captured image to the industrial control computer in real time for display on the monitor. The position below each dripping tube 32 is taken as the test position, and the operator can be arranged to visually observe the water absorption of each test position.

[0109] Timing begins the instant the winch 331 operates. The winch 331 drives the rotating disc to squeeze 1 μL of water out of the dripping tube 32. The water absorption at each test location is observed. Once the water at each test location is completely absorbed, the test time can be calculated. This test time is automatically recorded by the industrial control computer. After timing is complete at all test locations, the computer automatically calculates the average of all test times, thus automatically obtaining and recording the water absorption value. Although the water absorption value measured in this way has a certain error, the error is within a controllable range and will not lead to quality defects.

[0110] For automated testing, the software program within the industrial control computer can be optimized and upgraded to automatically end the timer the moment the water at the test location is absorbed, eliminating the need for manual operation. However, this method demands higher image quality and judgment accuracy; inaccurate judgments can lead to increased errors in the water absorption value. Therefore, a suitable option must be selected based on actual production testing needs.

[0111] The implementation principle of Embodiment 2 of this application is as follows:

[0112] In the first use state, the first straight segment 214 and the second straight segment 234 of the present application are directly connected, allowing the splicing paper to enter normally for single-sided water absorption testing. In the second use state, the moving mold base 23 moves downward relative to the fixed mold base 21 and is fixed in position by the positioning mechanism 25. At this time, the first channel 213 and the second channel 233 can be enclosed together to form a U-shape. The splicing paper can be rolled into a U-shape and enter the first channel 213 and the second channel 233. The dripping mechanism can simultaneously perform water absorption testing on both sides of the splicing paper, thereby quickly completing the test and recording the test results to facilitate subsequent splicing operations.

[0113] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for improving the splicing performance of paper rolls, characterized in that, Includes the following steps: ① Process standard setting: S1. Conduct water absorption tests on cigarette tipping paper, and collect and analyze the test results in a unified manner; S2. Test the tipping paper with different water absorption values ​​on the machine, track the test results of each model of cigarette machine, and record whether there are any rolling defects; S3. Through repeated machine tests, the appropriate water absorption range of each tipping paper from each manufacturer on each model of cigarette rolling machine was found. S4. Establish internal control process standards for the production of tipping paper water absorption value, and effectively monitor the water absorption value of tipping paper used on various types of cigarette machines; S5. Continuously track the loading status of the splicing paper, promptly report any splicing defects, and adjust and improve the internal control process standards based on the water absorption value recorded when the splicing paper is loaded onto the machine. ② Actual production stage: S6. Conduct a water absorption test on the cigarette tipping paper used on the machine, record the water absorption value of the tipping paper and keep it on file; S7. Based on the manufacturer of the tipping paper and the measured water absorption value of the tipping paper, select the corresponding cigarette machine according to the internal control process standards. S8. Start the machine and complete the cigarette rolling process.

2. The method for improving the splicing performance of spliced ​​paper rolls according to claim 1, characterized in that, The absorbency test method used for tipping paper includes the following steps: S61. Test multiple locations on the splice paper, and add 1ul of water to each of the multiple test locations on the splice paper; S62. Time the water absorption at each test location separately. Stop timing after the water droplets are absorbed by the splicing paper, and read and record the time taken at each test location. S63. Take the average of the test times at each test location, and the resulting time is the water absorption value of the splice paper.

3. A water absorption testing device applied to the method for improving the splicing performance of tipped paper as described in claim 2, characterized in that: The base assembly (1) includes a pressing unit (2) for fixing the splice paper, a dripping unit (3) for dripping water onto the splice paper, and an imaging unit (4) for measuring the water absorption value of the splice paper. The pressing unit (2) includes a fixed mold base (21) and two sets of first pressing mechanisms (22). The fixed mold base (21) is fixed to the base assembly (1) and has a first channel (213) for receiving paper to enter. The two sets of first pressing mechanisms (22) are spaced apart and respectively facing the two ends of the first channel (213). The first pressing mechanism (22) includes a first base platform (221) fixed to the fixed mold base (21) and a first pressing platform (222) movably disposed above the first base platform (221). The first base platform (221) is provided with a plurality of first rollers (223) that partially protrude from the top surface of the first base platform (221). The first pressing platform (222) is provided with a plurality of second rollers (224) that partially protrude from the bottom surface of the first pressing platform (222). In the initial state, each second roller (224) abuts against each first roller (223).

4. The water absorption testing device according to claim 3, characterized in that: The pressing unit (2) further includes a moving mold base (23) that is vertically slidably disposed on the base assembly (1) and two sets of second pressing mechanisms (24) fixed to the base assembly (1). The moving mold base (23) abuts against the side of the fixed mold base (21). The moving mold base (23) is provided with a second channel (233) for receiving paper to enter. The two sets of second pressing mechanisms (24) are spaced apart and respectively facing the two ends of the second channel (233). The first channel (213) includes a first straight segment (214) and a first curved segment (215) connected thereto. The second channel (233) includes a second straight segment (234) and a second curved segment (235) connected thereto. The extension direction of the first curved segment (215) is opposite to the extension direction of the second curved segment (235). The moving mold base (23) is provided with a positioning mechanism (25) for positioning. In the first use state, the first straight segment (214) and the second straight segment (234) are directly connected, and the first curved segment (215) and the second curved segment (235) are misaligned. In the second use state, the first curved segment (215) and the second curved segment (235) are partially directly connected, and the first straight segment (214) and the second straight segment (234) are misaligned, so that the first channel (213) and the second channel (233) together enclose and form a U-shaped shape.

5. The water absorption testing device according to claim 4, characterized in that: The positioning mechanism (25) includes a fixed base plate (251) fixed to the moving mold base (23), a limiting plug (252) movably connected to the fixed base plate (251), and a first spring (253) disposed between the limiting plug (252) and the fixed base plate (251). The first spring (253) normally forces the limiting plug (252) away from the fixed base plate (251) and exposed to the moving mold base (23). The fixed mold base (21) is provided with a limiting slot (216) on the side near the moving mold base (23). In the first use state, the limiting plug (252) is matched and inserted into the limiting slot (216). In the second use state, the limiting plug (252) abuts against the bottom surface of the fixed mold base (21).

6. The water absorption testing device according to claim 4, characterized in that: The base assembly (1) has a mounting stand (5) fixed on its top. The second pressing mechanism (24) includes a second base platform (241) fixed to the mounting stand (5) and a second pressing platform (242) movably disposed above the second base platform (241). The first pressing platform (222) and the second pressing platform (242) are both fixedly connected with inclined guide posts (26). The mounting stand (5) has inclined guide grooves (51) provided. Each of the inclined guide posts (26) is respectively matched and inserted into each of the inclined guide grooves (51). All the inclined guide posts (26) are connected to an operating member (261). The operating member (261) is normally in contact with the mounting base (5). At this time, the second roller (224) is normally in contact with the first roller (223). The mounting base (5) is provided with a holding mechanism (52). After the operating member (261) moves outward, it is held in position by the holding mechanism (52). At this time, the second roller (224) and the first roller (223) are spaced apart.

7. The water absorption testing device according to claim 6, characterized in that: The retaining mechanism (52) includes a mechanism box (521) fixed to the mounting base (5), a plug plate (522) movably installed inside the mechanism box (521), and a second spring (523) disposed between the plug plate (522) and the mechanism box (521); wherein, the plug plate (522) passes through the mechanism box (521) and is partially exposed outside the mechanism box (521). In the initial state, the plug plate (522) normally abuts against the operating member (261); when the operating member (261) moves away from the mounting base (5), the plug plate (522) enters between the operating member (261) and the mounting base (5).

8. The water absorption testing device according to claim 4, characterized in that: The dripping unit (3) includes two sets of dripping mechanisms, which are respectively fixedly mounted on the fixed mold base (21) and the moving mold base (23); wherein, the dripping mechanism includes a fixedly mounted support rod (31), a plurality of dripping tubes (32) detachably connected to the support rod (31), and a drive mechanism (33) for driving each dripping tube (32) to move together. The outer circumference of each dripping tube (32) is connected to a hose (34) through a one-way valve (329), and each hose (34) is connected to the liquid storage bottle. The drip tube (32) has a needle (321) at its bottom end and a rotating seat (322) rotatably mounted at its top end. The driving mechanism (33) is used to drive the rotating seat (322) to rotate. A piston rod (323) is movably inserted inside the drip tube (32). A sealing end (324) is provided at the bottom end of the piston rod (323). The outer diameter of the sealing end (324) matches the inner diameter of the drip tube (32). An abutment plate (325) is provided at the top end of the piston rod (323). The abutment plate (325) is inclined to abut against the rotating seat (322). A third spring (326) is provided between the piston rod (323) and the drip tube (32). The third spring (326) is used to force the abutment plate (325) to abut against the rotating seat (322) in a normal state.

9. The water absorption testing device according to claim 8, characterized in that: The drive mechanism (33) includes a winch (331) fixedly installed, a rope reel (332) connected to the output end of the winch (331), and a take-up rope (333) with one end fixed to the rope reel (332). The end of the take-up rope (333) away from the turntable is fixedly installed. Each of the rotating seats (322) has an extension (3221) at its top, and the extension (3221) has a slot (3222) through which the pull rope (333) passes. In the initial state, the abutment plate (325) and the rotating seat (322) are inclined to abut against each other, and the pull rope (333) is in a slack state. When the pull rope (333) is pulled taut, the pull rope (333) forces the rotating seat (322) to rotate, thereby driving the abutment plate (325) to move downward.

10. The water absorption testing device according to claim 4, characterized in that: The imaging unit (4) includes a first camera (41) fixedly mounted on the first pressing mechanism (22), a second camera (42) fixedly mounted on the second pressing mechanism (24), and an industrial control computer that is communicatively connected to the first camera (41) and the second camera (42).

Images