Equipment and method for detecting air permeability of tipping paper for printing cigarettes

Abstract

The invention belongs to the technical field of material detection equipment, and particularly relates to equipment and a method for detecting the air permeability of tipping paper for printing cigarettes, the equipment comprises a base, two clamp assemblies and a test assembly, and the two movable clamp assemblies are symmetrically arranged on the base; two movable test assemblies are symmetrically arranged between the two clamp assemblies, each test assembly comprises a fixed seat, a clamping bottom ring, a clamping top ring and a clamping air cylinder, a clamping groove is formed in the inner side of each fixed seat, each clamping bottom ring is embedded in the bottom end of the corresponding clamping groove, each clamping top ring is arranged at the upper end of the corresponding clamping groove, and each clamping top ring directly faces the corresponding clamping bottom ring; a clamping air cylinder is arranged at the upper end of the fixing base, and a first piston rod of the clamping air cylinder is connected with the clamping top ring. Through the double test assemblies, one test assembly is used for suction cleaning and first detection, and then the other test assembly is used for secondary detection, so that a judgment basis is provided for subsequent test of other point positions of the tipping paper, the test process is shortened, and the accuracy of air permeability detection is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of material detection equipment, and in particular relates to an air permeability detection device and method for tipping paper for printed cigarettes. Background Art

[0002] Cigarette ventilation dilution technology is a key technology to reduce the harm of smoking and reduce tar intake. This technology is mainly achieved by increasing the air circulation in the cigarette filter part, thereby diluting the concentration of inhaled smoke and reducing the amount of harmful substances inhaled.

[0003] Ventilation dilution is achieved by punching holes in the cigarette tipping paper, allowing outside air to enter the filter and mix with the smoke, thereby diluting the inhaled smoke. Permeability control refers to the ability of these holes to let how much air pass through, which is crucial to the function of the tipping paper. The higher the permeability, the more fresh air can be mixed into the smoke, further diluting the harmful components. Therefore, the permeability of the tipping paper needs to be strictly designed and measured.

[0004] For example, the patent with publication number CN203178165U discloses a tipping paper air permeability tester, including a box, a measuring fixture, a vacuum pump, a pressure regulating device and a processing module; the pressure of the measuring fixture is adjusted by the pressure regulating device to generate a pressure difference on the two sides of the sample to be tested, and then the air permeability value is obtained after processing by the processing module. At present, laser punching is basically used for punching cigarette tipping paper. In order to prevent the influence of punching waste or dust residue on the tipping paper, appropriate processes and cleaning measures are usually adopted. Qualified laser-punched tipping paper products should not have waste or dust left over from punching during normal use. However, in the process of air permeability testing after punching, the tipping paper samples will be secondary polluted in various transfer links, and dust will penetrate into the punching gaps, thereby affecting the accuracy of the air permeability test. Summary of the invention

[0005] In view of the technical problems existing in the background technology, the present invention provides an air permeability detection device for tipping paper for printed cigarettes.

[0006] To achieve the above purpose, the technical solution provided by the present invention is:

[0007] A device for detecting the air permeability of tipping paper for printed cigarettes comprises a base, a fixture assembly and a test assembly, wherein two movable fixture assemblies are symmetrically arranged on the base, and the tipping paper is clamped on the two fixture assemblies; two movable test assemblies are symmetrically arranged between the two fixture assemblies, and the moving directions of the test assemblies and the clamp assemblies are perpendicular to each other; the test assembly comprises a fixed seat, a clamping bottom ring, a clamping top ring and a clamping cylinder, a clamping groove is arranged on the inner side of the fixed seat, the clamping bottom ring is embedded in the bottom end of the clamping groove, the clamping top ring is arranged at the upper end of the clamping groove, and the clamping top ring is directly opposite to the clamping bottom ring; a clamping cylinder is arranged at the upper end of the fixed seat, and the first piston rod of the clamping cylinder is connected to the clamping top ring.

[0008] Optionally, a first joint is provided on the clamping top ring, and a second joint is provided on the clamping bottom ring, the first joint is connected to a first control valve through a first pipe, the second joint is connected to the first control valve through a second pipe, and the first control valve is connected to a suction device; a second control valve is provided on the first pipe, the second control valve is connected to a first filter, and a first pressure sensor is provided on the first pipe between the second control valve and the first joint; a third control valve is provided on the second pipe, the third control valve is connected to a second filter, and a second pressure sensor is provided on the second pipe between the third control valve and the second joint.

[0009] Optionally, the clamp assembly includes a mounting seat, a motor, a screw rod, a sliding nut and a clamping block, the mounting seat is provided with a U-shape, a screw rod is rotatably provided on the mounting seat, one end of the screw rod is connected to the motor for transmission, the sliding nut is cooperatively connected to the screw rod, and the bottom end of the sliding nut is slidably provided on the mounting seat; a clamping block is provided at the upper end of the sliding nut, a clamping groove is provided on the clamping block, the tipping paper is provided in the clamping groove, and a pressure block is cooperatively provided in the clamping groove.

[0010] Optionally, guide grooves are symmetrically provided on both sides of the sliding nut, the clamping block is set to be U-shaped, and guide blocks are symmetrically provided on the inner wall of the clamping block, and the guide blocks are slidably set in the guide grooves; connecting blocks are respectively provided on both sides of the clamping block, a sliding rod is provided between the two connecting blocks, a sliding hole is provided on the sliding nut, and the sliding rod is slidably set in the sliding hole; a spring is sleeved on the sliding rod between the sliding nut and the connecting block.

[0011] Optionally, blocking blocks are respectively provided at both ends of the mounting seat, and when the tipping paper reaches the inside of the card slot on either side, the end of the clamping block abuts against the blocking block.

[0012] Optionally, the test assembly also includes an adjusting cylinder, the second piston rod of the adjusting cylinder is connected to a T-shaped sliding block, both ends of the sliding block are respectively connected to a fixed seat, a sliding groove is provided at the upper end of the base, and the bottom end of the sliding block is slidably set in the sliding groove.

[0013] Optionally, a clamping portion is provided at the bottom end of the pressing block, and the clamping portion is arranged in a clamping groove. A positioning hole is provided on the outside of the clamping groove, and a positioning column cooperating with the positioning hole is provided at the bottom end of the pressing block.

[0014] Optionally, the regulating cylinder is fixed on a side wall of the base, and the second piston rod passes through the base and reaches the sliding groove.

[0015] A method for detecting air permeability of tipping paper for printed cigarettes, comprising the following steps:

[0016] S1, first suction cleaning: start the motor, adjust the tipping paper to reach the slot of one of the fixed seats, and there is a gap between the clamping bottom ring and the clamping top ring and the tipping paper, start the suction device, and suck the clamping bottom ring and the clamping top ring together. During the suction process, start the adjustment cylinder to suck along the length direction of the tipping paper;

[0017] S2, first suction test: start the clamping cylinder, control the clamping bottom ring and the clamping top ring to clamp the tipping paper, start the suction device, only one of the clamping bottom ring and the clamping top ring is suctioned, and the other is connected to the atmosphere. During the suction process, the pressure sensor is used to measure the pressure difference at both ends of the tipping paper sample, and the pressure difference is recorded as P1;

[0018] S3, suction test again: start the motor, adjust the tipping paper to reach the slot of another fixed seat, start the clamping cylinder, control the clamping bottom ring and the clamping top ring to clamp the tipping paper together, start the suction device, only one of the clamping bottom ring and the clamping top ring is sucked, and the other is connected to the atmosphere. During the suction process, the pressure sensor is used to measure the pressure difference at both ends of the tipping paper sample, and the pressure difference is recorded as P2.

[0019] A method for detecting air permeability of tipping paper for printed cigarettes comprises the following steps: when pressure differences P1 and P2 are equal, the step of first puff detection is cancelled when detecting other detection points of the tipping paper; when pressure differences P1 and P2 are not equal, the steps of first puff detection and second puff detection need to be repeated for each detection.

[0020] The present invention has the following advantages and beneficial effects:

[0021] In the present invention, the tipping paper is clamped and fixed by designing a clamp assembly, and the position of the tipping paper is adjusted, and the tipping paper is transferred to the test assemblies on both sides. Through the design of double test assemblies, one of the test assemblies is used for suction cleaning and suction air permeability detection, and then the other test assembly is used to perform air permeability detection again. The error of the results of the two tests is used to judge the requirements of the cleanliness and dust-freeness of the tipping paper after suction, and then provide a judgment basis for the subsequent testing of multiple points of the tipping paper, so as to greatly reduce the test process and improve the accuracy of air permeability detection. This equipment and method can avoid the problem of secondary contamination of the tipping paper sample in various transfer links, dust infiltration in the punching gap, etc., which affects the accuracy of the air permeability test. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the air permeability detection device for printing cigarette tipping paper in the present invention;

[0023] Figure 2 for Figure 1 Front view of

[0024] Figure 3 for Figure 2 Left view of

[0025] Figure 4 for Figure 2 A top view of

[0026] Figure 5 for Figure 1 A partial enlarged view of the structure in the middle;

[0027] Figure 6 It is a structural diagram of the fixture assembly and the detection assembly in the present invention;

[0028] Figure 7 for Figure 6 A partial enlarged view of point a in the middle;

[0029] Figure 8 It is a cross-sectional view of the installation of the clamp assembly and the tipping paper in the present invention;

[0030] Fig. 9 This is one of the structural diagrams of the sliding nut and the clamping block in the present invention;

[0031] Fig.10 This is the second structural diagram of the sliding nut and the clamping block in the present invention;

[0032] Fig.11 for Fig.10 Bottom view of

[0033] Fig.12It is a structural diagram of the detection component in the present invention;

[0034] Fig.13 It is a structural diagram of the clamping block in the present invention;

[0035] Fig.14 is a cross-sectional view of the clamping block in the present invention;

[0036] Fig.15 It is a structural diagram of the briquette in the present invention;

[0037] Fig.16 It is a system flow chart of the detection component and the suction device in the present invention.

[0038] Figure numerals: 1-base, 11-sliding groove, 2-adjusting cylinder, 21-second piston rod, 3-sliding block, 31-sliding portion, 4-fixed seat, 41-slot, 42-mounting groove, 43-mounting hole, 44-connecting groove, 5-clamping cylinder, 51-clamping top ring, 511-first joint, 52-clamping bottom ring, 521-second joint, 53-first piston rod, 54-first pipeline, 541-second control valve, 542-first pressure sensor, 543-first filter, 55-second pipeline, 551 -the third control valve, 552-the second pressure sensor, 553-the second filter, 56-the suction device, 561-the first control valve, 6-the mounting seat, 61-the motor, 62-the lead screw, 63-the first blocking block, 64-the second blocking block, 7-the sliding nut, 71-the guide groove, 72-the sliding hole, 8-the clamping block, 81-the guide block, 82-the sliding rod, 83-the connecting block, 84-the spring, 85-the clamping groove, 86-the positioning hole, 9-the pressing block, 91-the handle, 92-the pressing part, 93-the positioning column, 10-the tipping paper. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Example 1

[0042] like Figure 1 to Figure 15As shown, a device for detecting air permeability of tipping paper for printed cigarettes includes a base 1, a fixture assembly, a testing assembly, etc.

[0043] like Figures 1 to 8 As shown, two movable clamp assemblies are symmetrically arranged on the base 1, and the two clamp assemblies clamp the tipping paper 10. The movable clamp assemblies are used to adjust the position of the tipping paper 10. Two movable test assemblies are symmetrically arranged between the two clamp assemblies. The two test assemblies are fixed as one body, and the moving direction of the test assembly and the moving direction of the clamp assembly are perpendicular to each other. The movable test assembly is used to realize suction cleaning and air permeability detection of multiple points of the test assembly along the length direction of the tipping paper 10.

[0044] like Figures 1 to 8 As shown, the test assembly includes a fixed seat 4, a clamping bottom ring 52, a clamping top ring 51 and a clamping cylinder 5. A clamping groove 41 is provided on the inner side of the fixed seat 4 so that the fixed seat 4 is in a U-shaped structure as a whole. The clamping bottom ring 52 is embedded in the bottom end of the clamping groove 41, wherein a mounting hole 43 is provided at the bottom end of the clamping groove 41, and the clamping bottom ring 52 is arranged in the mounting hole 43. The clamping top ring 51 is arranged at the upper end of the clamping groove 41, and the clamping top ring 51 is directly opposite to the clamping bottom ring 52. The upper end of the fixed seat 4 is provided with a mounting groove 42 connected to the clamping groove 41, and the clamping cylinder 5 is arranged in the mounting groove 42. The first piston rod 53 of the clamping cylinder 5 extends into the clamping groove 41 and is connected to the clamping top ring 51. The distance between the clamping top ring 51 and the clamping bottom ring 52 is adjusted by the clamping cylinder 5. The clamping top ring 51 and the clamping bottom ring 52 are both internal through structures and can be directly connected to the outside world.

[0045] Reference Figure 1 as well as Fig.16 The clamping top ring 51 is provided with a first joint 511, the bottom end of the clamping top ring 51 is open and communicated with the first joint 511, and the clamping bottom ring 52 is provided with a second joint 521, the upper end of the clamping bottom ring 52 is open and communicated with the second joint 521. The first joint 511 is connected to the first control valve 561 through the first pipeline 54, the second joint 521 is connected to the first control valve 561 through the second pipeline 55, and the first control valve 561 is connected to the suction device 56. The first pipeline 54 is provided with a second control valve 541, the second control valve 541 is connected to the first filter 543, and the first pipeline 54 between the second control valve 541 and the first joint 511 is provided with a first pressure sensor 542; the second pipeline 55 is provided with a third control valve 551, the third control valve 551 is connected to the second filter 553, and the second pipeline 55 between the third control valve 551 and the second joint 521 is provided with a second pressure sensor 552.

[0046] When testing, it is only necessary to clamp the tipping paper 10, move it so that it is placed between the clamping top ring 51 and the clamping bottom ring 52, and press it tightly with the clamping top ring 51 and the clamping bottom ring 52. Then, an external suction device is used to generate a pressure difference on both sides of the tipping paper 10 sample to be tested, and then the air permeability value is obtained after processing by the processing module.

[0047] In the present invention, the tipping paper 10 is clamped and fixed by designing a clamp assembly, and the position of the tipping paper 10 is adjusted, and the tipping paper 10 is transferred to the test assemblies on both sides. Through the design of the double test assembly, one of the test assemblies is used for suction cleaning and suction air permeability detection, and then the other test assembly is used to perform air permeability detection again. The error of the results of the two tests is used to judge the requirements of the cleanliness and dust-freeness of the tipping paper 10 after suction, and then provide a judgment basis for the subsequent testing of multiple points of the tipping paper 10, so as to greatly reduce the test process and improve the accuracy of air permeability detection. This equipment and method can avoid the problem of secondary contamination of the tipping paper 10 sample in various transfer links, dust infiltration in the punching gap, etc., which affects the accuracy of air permeability testing.

[0048] Example 2

[0049] like Figure 1 to Figure 15 As shown, the clamp assembly includes a mounting seat 6, a motor 61, a screw rod 62, a sliding nut 7 and a clamping block 8. The mounting seat 6 is provided with a U-shape, and a screw rod 62 is rotatably provided on the mounting seat 6. One end of the screw rod 62 is connected to the motor 61 for transmission, and the motor 61 is fixed on one side of the mounting seat 6. The sliding nut 7 is connected with the screw rod 62, and the bottom end of the sliding nut 7 is slidably provided on the mounting seat 6; the upper end of the sliding nut 7 is provided with a clamping block 8, and the clamping block 8 is provided with a clamping groove 85, and the tipping paper 10 is arranged in the clamping groove 85, and a pressing block 9 is provided in the clamping groove 85. The screw rod 62 lateral movement mechanism is used to drive the two clamping blocks 8 to lateral movement to achieve the position adjustment of the tipping paper 10; at the same time, the tipping paper 10 is pressed in the clamping groove 85 by the pressing block 9 in a pressing manner, so as to facilitate the subsequent non-destructive sealing suction air permeability test of the tipping paper 10.

[0050] Furthermore, guide grooves 71 are symmetrically arranged on both sides of the sliding nut 7, the clamping block 8 is arranged in a U shape, the clamping block 8 is slidably arranged on the upper end surface of the sliding nut 7, and the inner wall of the clamping block 8 is symmetrically arranged with guide blocks 81, and the guide blocks 81 are slidably arranged in the guide grooves 71 to achieve sliding guidance. Connecting blocks 83 are respectively arranged on both sides of the clamping block 8, and two sliding rods 82 are arranged between the two connecting blocks 83. A sliding hole 72 is arranged on the sliding nut 7, and the sliding rod 82 is slidably arranged in the sliding hole 72; a spring 84 is sleeved on the sliding rod 82 between the sliding nut 7 and the connecting block 83. Fig.11 The length of the clamping block 8 is greater than that of the sliding nut 7. When the clamping block 8 is set on the sliding nut 7, the clamping block 8 is limited by the springs 84 on both sides of the sliding nut 7 so that it is set in the center. When the clamping block 8 is subjected to external force, it can move relative to the sliding nut 7.

[0051] Furthermore, blocking blocks are respectively provided at both ends of the mounting seat 6, including a first blocking block 63 and a second blocking block 64. When the tipping paper 10 reaches the inside of the card slot 41 on either side, the end of the clamping block 8 abuts against one of the blocking blocks.

[0052] The design of this buffer structure has the following advantages:

[0053] First, two motors 61, i.e., a screw slider structure, are used to jointly adjust the position of the tipping paper 10. However, the synchronization of the movement of the two clamping blocks 8 depends on the precise regulation of the motor 61. However, during the control operation of the motor 61, it is still difficult to ensure the synchronization of the movement of the two clamping blocks 8, which will cause the two clamping blocks 8 to arrive at the set position one after another with a certain time difference (generally within a few milliseconds). This will cause the tipping paper 10 to be loose, tilted, misaligned, wrinkled, etc. after it is in place due to the deviation of the parking position of the clamping blocks 8 on both sides. However, the present invention is designed with a clamping block 8 that can be elastically buffered. Even if there are control errors in the two motors 61, or there are matching errors between the lead screw 62 and the sliding nut 7, etc., resulting in the two clamping blocks 8 contacting the blocking block in succession at a certain interval, after contacting the blocking block, the positions of the two clamping blocks 8 are fixed, but the sliding nut 7 can continue to move, during which the spring 84 is compressed and will not affect the movement of the sliding nut 7. In this way, it can be ensured that the two clamping blocks 8 eventually reach the same set position, and the final tipping paper 10 is in a horizontal state after it is in place. When the clamping top ring 51 and the clamping bottom ring 52 press the tipping paper 10, the two ends of the tipping paper 10 can move relative to the pressing block 8 to a certain extent, so that the tipping paper 10 is in a taut state, thereby avoiding the tipping paper 10 being transported out of position and wrinkled due to the accuracy problem of the lead screw nut mechanism, thereby affecting the subsequent precise positioning, pressing and air permeability detection.

[0054] Secondly, the buffer mechanism can be used to achieve buffer parking of the positioning block, reduce the parking impact of the motor 61, and ensure the service life of the motor 61, the screw rod 62, and the sliding nut 7.

[0055] like Figure 1 to Figure 15As shown, the test assembly also includes an adjusting cylinder 2, which is fixed on the side wall of the base 1, and the second piston rod 21 of the adjusting cylinder 2 is connected to the T-shaped sliding block 3, and the two ends of the sliding block 3 are respectively connected to the fixed seat 4. The upper end of the base 1 is provided with a sliding groove 11, and the bottom end of the sliding block 3 is provided with a sliding part 31, and the sliding part 31 is slidably set in the sliding groove 11. The second piston rod 21 passes through the base 1 and reaches the sliding groove 11. Among them, the bottom side of the fixed seat 4 is provided with a connecting groove 44, and the two ends of the sliding block 3 are matched and set in the connecting groove 44. The fixed seat 4 and the sliding block 3 can be fixed by welding or the like. The movement of the test assembly is realized by adjusting the cylinder 2, so that it moves along the length direction of the tipping paper 10 for suction cleaning and air permeability detection.

[0056] Furthermore, a handle 91 is provided at the upper end of the pressing block 9, and a clamping portion 92 is provided at the bottom end of the pressing block 9. The clamping portion 92 is arranged in the clamping groove 85. A plurality of positioning holes 86 are arranged on the outer side of the clamping groove 85. A positioning column 93 cooperating with the positioning hole 86 is provided at the bottom end of the pressing block 9. This structure can facilitate the positioning and installation of the pressing block 9.

[0057] Example 3

[0058] A method for detecting air permeability of tipping paper 10 for printed cigarettes, comprising the following steps:

[0059] S1, first suction cleaning: start the motor 61, adjust the tipping paper 10 to reach the slot 41 of one of the fixing seats 4, and the clamping bottom ring 52 and the clamping top ring 51 have gaps with the tipping paper 10 respectively, start the suction device, the clamping bottom ring 52 and the clamping top ring 51 are sucked together, and during the suction process, start the adjustment cylinder 2 to suck along the length direction of the tipping paper 10.

[0060] S2, first suction test: start the clamping cylinder 5, control the clamping bottom ring 52 and the clamping top ring 51 to clamp the tipping paper 10, start the suction device, only one of the clamping bottom ring 52 and the clamping top ring 51 is suctioned, and the other is connected to the atmosphere. During the suction process, the pressure difference at both ends of the tipping paper 10 sample is measured by a pressure sensor, and the pressure difference is recorded as P1;

[0061] S3, suction test again: start the motor 61, adjust the tipping paper 10 to reach the other card slot 41 of the fixing seat 4, start the clamping cylinder 5, control the clamping bottom ring 52 and the clamping top ring 51 to clamp the tipping paper 10 to each other, start the suction device, only one of the clamping bottom ring 52 and the clamping top ring 51 is suctioned, and the other is connected to the atmosphere. During the suction process, the pressure difference at both ends of the tipping paper 10 sample is measured by a pressure sensor, and the pressure difference is recorded as P2.

[0062] A method for detecting air permeability of tipping paper for printed cigarettes comprises the following steps: when pressure differences P1 and P2 are equal, the step of first puff detection is cancelled when detecting other detection points of the tipping paper; when pressure differences P1 and P2 are not equal, the steps of first puff detection and second puff detection need to be repeated for each detection.

[0063] When the air permeability of the two suction tests, that is, the pressure differences P1 and P2 are equal, it is proved that the first suction cleaning is qualified, or the cleanliness of the punching position of the tipping paper 10 is qualified. When the air permeability test of other points is performed subsequently, the first suction test operation can be cancelled.

[0064] When the air permeability of the cigarette tipping paper 10 is tested twice before and after, that is, the pressure differences P1 and P2 are not equal, it proves that the first suction cleaning is unqualified, or that there is dust and the like remaining at the punching position of the tipping paper 10 after the first suction cleaning, and the cleanliness is unqualified, which leads to the inconsistency of the two air permeability tests. When the air permeability test of other points is performed subsequently, the first suction test operation is not cancelled. The purpose of this is: after the first suction cleaning, the first suction test and the second suction test are used to determine whether the cleanliness of the cigarette tipping paper 10 meets the requirements. When the two air permeability tests are inconsistent, the first suction test operation is not cancelled when the air permeability test of other points is performed subsequently. At this time, the function of the first suction test is not air permeability testing, but suction cleaning, that is, on the basis of the first suction cleaning, the suction and dust removal operation of full sealing is performed again.

[0065] In other words, there are two detection components, one of which is used for the first suction cleaning, and is used for the first suction detection to determine the pass rate of the first suction cleaning. When the first suction cleaning is unqualified, the first suction detection is used to perform sealing and pressing, and negative pressure suction to ensure the cleanliness of the punching position; thereby ensuring that the other detection component can detect more accurate air permeability at the cleaning position.

[0066] Suction cleaning principle:

[0067] In step S1: Fig.16 As shown, the tipping paper 10 is placed between the clamping top ring 51 and the clamping bottom ring 52, and there is a gap between the tipping paper 10 and the clamping top ring 51, and between the tipping paper 10 and the clamping bottom ring 52. Then, the first control valve 561 is controlled to open, so that the suction device 56 is connected to the first pipe 54 and the second pipe 55; and the second control valve 541 is controlled to be in a closed and disconnected state with the first filter 543, and the third control valve 551 is controlled to be in a closed and disconnected state with the second filter 553.

[0068] Start the suction device, suck from the bottom end of the clamping top ring 51 and the upper end of the clamping bottom ring 52, and suck on both sides of the tipping paper 10 respectively, and suck and remove dust from the punching positions of the tipping paper 10. When sucking, adjust the cylinder 2 to start, and move along the length direction of the tipping paper 10 to fully suck, so as to ensure the cleanliness of multiple punching positions.

[0069] In step S2 , during the first suction test, the position of the test assembly needs to be adjusted using the adjusting cylinder 2 to determine a test position on the tipping paper 10 .

[0070] like Fig.16 As shown, the tipping paper 10 is placed between the clamping top ring 51 and the clamping bottom ring 52, and the tipping paper 10 and the clamping top ring 51, and the tipping paper 10 and the clamping bottom ring 52 are tightly pressed to form a sealed environment, and then suction is performed.

[0071] The first suction step: control the first control valve 561 to open, connect the suction device 56 to the first pipe 54, and disconnect the suction device 56 from the second pipe 55; and control the second control valve 541 to be in a closed and disconnected state with the first filter 543, and control the third control valve 551 to be in an open state with the second filter 553.

[0072] The suction device is started to suck from the bottom end of the clamping top ring 51 and the upper side of the butt paper 10, so that a constant pressure difference is formed on both sides of the sample. The pressure sensor tests the air flow rate penetrating the sample and transmits the flow rate signal to the processing mechanism, which processes the flow rate signal and calculates the air permeability of the sample according to the area, pressure difference and flow rate flowing through the sample.

[0073] The second suction step: control the first control valve 561 to open, so that the suction device 56 is connected to the second pipe 55, and the suction device 56 is disconnected from the first pipe 54; and control the third control valve 551 to be in a closed and disconnected state with the second filter 553, and control the second control valve 541 to be in an open state with the first filter 543.

[0074] The suction device is started to suck from the upper end of the clamping bottom ring 52 and the lower side of the butt paper 10, so that a constant pressure difference is formed on both sides of the sample. The pressure sensor tests the air flow rate penetrating the sample and transmits the flow rate signal to the processing mechanism, which processes the flow rate signal and calculates the air permeability of the sample according to the area, pressure difference and flow rate flowing through the sample.

[0075] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for testing the air permeability of printed cigarette tipping paper, characterized in that: Including base, fixture assembly and test assembly, Two movable clamp assemblies are symmetrically arranged on the base, and the two clamp assemblies clamp the tipping paper; Two movable test assemblies are symmetrically arranged between the two fixture assemblies, and the moving direction of the test assemblies and the moving direction of the fixture assemblies are perpendicular to each other; The test assembly includes a fixed seat, a clamping bottom ring, a clamping top ring and a clamping cylinder. A slot is arranged on the inner side of the fixed seat. The clamping bottom ring is embedded in the bottom end of the slot. The clamping top ring is arranged at the upper end of the slot, and the clamping top ring is opposite to the clamping bottom ring. A clamping cylinder is arranged at the upper end of the fixed seat, and a first piston rod of the clamping cylinder is connected to the clamping top ring.

2. The air permeability testing device for printed cigarette tipping paper according to claim 1, characterized in that: The clamping top ring is provided with a first joint, the clamping bottom ring is provided with a second joint, the first joint is connected to a first control valve through a first pipeline, the second joint is connected to the first control valve through a second pipeline, and the first control valve is connected to a suction device; A second control valve is arranged on the first pipeline, the second control valve is connected to the first filter, and a first pressure sensor is arranged on the first pipeline between the second control valve and the first joint; a third control valve is arranged on the second pipeline, the third control valve is connected to the second filter, and a second pressure sensor is arranged on the second pipeline between the third control valve and the second joint.

3. The air permeability detection device for printed cigarette tipping paper according to claim 1, characterized in that: The clamp assembly includes a mounting seat, a motor, a screw, a sliding nut and a clamping block. The mounting seat is provided with a U shape, and a screw is rotatably provided on the mounting seat. One end of the screw is connected to the motor for transmission, and the sliding nut is cooperated with the screw, and the bottom end of the sliding nut is slidably provided on the mounting seat; a clamping block is provided at the upper end of the sliding nut, a clamping groove is provided on the clamping block, the tipping paper is provided in the clamping groove, and a pressure block is cooperated in the clamping groove.

4. The air permeability testing device for printed cigarette tipping paper according to claim 3, characterized in that: Guide grooves are symmetrically arranged on both sides of the sliding nut, the clamping block is arranged in a U shape, and guide blocks are symmetrically arranged on the inner wall of the clamping block, and the guide blocks are slidably arranged in the guide grooves; connecting blocks are respectively arranged on both sides of the clamping block, a sliding rod is arranged between the two connecting blocks, a sliding hole is arranged on the sliding nut, and the sliding rod is slidably arranged in the sliding hole; a spring is sleeved on the sliding rod between the sliding nut and the connecting block.

5. The air permeability testing device for printed cigarette tipping paper according to claim 4, characterized in that: Stop blocks are respectively arranged at both ends of the mounting seat. When the tipping paper reaches the inside of the card slot on either side, the end of the clamping block abuts against the stop block.

6. The air permeability testing device for printed cigarette tipping paper according to claim 1, characterized in that: The test assembly also includes an adjusting cylinder, a second piston rod of the adjusting cylinder is connected to a T-shaped sliding block, both ends of the sliding block are respectively connected to a fixed seat, a sliding groove is provided at the upper end of the base, and the bottom end of the sliding block is slidably arranged in the sliding groove.

7. The air permeability testing device for printed cigarette tipping paper according to claim 4, characterized in that: The bottom end of the pressing block is provided with a pressing portion, which is matched and arranged in a clamping groove. A positioning hole is provided on the outside of the clamping groove, and the bottom end of the pressing block is provided with a positioning column matched with the positioning hole.

8. The air permeability testing device for printed cigarette tipping paper according to claim 6, characterized in that: The regulating cylinder is fixed on the side wall of the base, and the second piston rod passes through the base and reaches the sliding groove.

9. A method for air permeability testing using the air permeability testing device for printed cigarette tipping paper according to any one of claims 1 to 8, comprising the following steps: S1, first suction cleaning: start the motor, adjust the tipping paper to reach the slot of one of the fixed seats, and there is a gap between the clamping bottom ring and the clamping top ring and the tipping paper, start the suction device, and suck the clamping bottom ring and the clamping top ring together. During the suction process, start the adjustment cylinder to suck along the length direction of the tipping paper; S2, first suction test: start the clamping cylinder, control the clamping bottom ring and the clamping top ring to clamp the tipping paper, start the suction device, only one of the clamping bottom ring and the clamping top ring is suctioned, and the other is connected to the atmosphere. During the suction process, the pressure sensor is used to measure the pressure difference at both ends of the tipping paper sample, and the pressure difference is recorded as P1; S3, suction test again: start the motor, adjust the tipping paper to reach the slot of another fixed seat, start the clamping cylinder, control the clamping bottom ring and the clamping top ring to clamp the tipping paper together, start the suction device, only one of the clamping bottom ring and the clamping top ring is sucked, and the other is connected to the atmosphere. During the suction process, the pressure sensor is used to measure the pressure difference at both ends of the tipping paper sample, and the pressure difference is recorded as P2.

10. A method for air permeability testing using the air permeability testing device for printed cigarette tipping paper according to claim 9, comprising the following steps: When the pressure differences P1 and P2 are equal, the first suction test step is canceled when testing other test points of the tipping paper; when the pressure differences P1 and P2 are not equal, the first suction test and the second suction test steps need to be repeated for each test.

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