Full-automatic code spraying device for cigarette case production and implementation method thereof

Abstract

The invention discloses a full-automatic code spraying device for cigarette case production and an implementation method thereof.The full-automatic code spraying device comprises a supporting frame, a code spraying conveying belt, an auxiliary conveying device, a code spraying limiting assembly, a laser code spraying machine, a driving assembly and a dust collection assembly, the driving assembly drives the code spraying conveying belt to conduct intermittent conveying at the same time, the laser code spraying machine conducts up-down reciprocating code spraying, and the dust collection assembly is started and stopped synchronously; the driving assembly comprises a driving motor, a ratchet wheel disc, a first cam driving plate and a second cam driving plate, and the ratchet wheel disc, the first cam driving plate and the second cam driving plate are coaxially and fixedly connected to an output shaft of the driving motor. Integrated linkage of intermittent conveying of the code spraying conveying belt, up-down reciprocating code spraying of the laser code spraying machine and starting and stopping of the dust collection assembly is achieved, a traditional multi-motor independent control mode is abandoned, equipment energy consumption and maintenance cost are effectively reduced, meanwhile, by presetting the included angle of the two cam drive plates, it is guaranteed that dust collection is started synchronously after code spraying is completed, and efficiency is improved. And the code spraying quality is prevented from being influenced by dust residues.

Description

Technical Field

[0001] This invention relates to the field of automatic inkjet printing technology, specifically to a fully automatic inkjet printing device for cigarette box production and its implementation method. Background Technology

[0002] In the cigarette box production process, the coding process is a crucial step for product traceability, anti-counterfeiting, and information labeling, requiring strict standards for accuracy, efficiency, and cleanliness. Laser coding, with its advantages of clear marking, wear resistance, and high speed, has become the mainstream method for cigarette box coding. However, existing cigarette box laser coding devices use a multi-motor independent control mode in their drive system, separately driving the conveyor mechanism, laser coding mechanism, and dust collection mechanism. This makes it difficult to precisely synchronize the actions of each mechanism, resulting in insufficient precision in the coordination between the laser coding machine's downward movement and the intermittent pauses of the conveyor belt. This easily leads to problems such as misaligned coding and broken character lines. Simultaneously, the delayed start of the dust collection mechanism leaves dust generated by laser coding residue on the cigarette box surface or the printing nozzle, directly affecting the clarity of the coding.

[0003] Furthermore, the reciprocating motion guidance accuracy of the laser marking machine is insufficient, and the focusing distance between the inkjet nozzle and the cigarette box surface fluctuates greatly. In addition, the cigarette box surface is prone to dust accumulation, which further leads to blurry markings and insufficient contrast, failing to meet the high-precision marking requirements of cigarette boxes. Summary of the Invention

[0004] Therefore, the present invention provides a fully automatic inkjet printing device and its implementation method for cigarette box production, in order to overcome the problems of the prior art.

[0005] This invention is implemented by the following technical solution:

[0006] A fully automatic inkjet printing device for cigarette box production includes a support frame, an inkjet printing conveyor belt, an auxiliary conveying device, an inkjet printing limit component, a laser inkjet printer, a drive component, and a dust collection component. The drive component uses a single drive motor as its sole power source. Its output shaft is coaxially fixed to a ratchet disc, a first cam dial, and a second cam dial. This single power source synchronously drives the intermittent conveying of the inkjet printing conveyor belt, the reciprocating inkjet printing of the laser inkjet printer, and the synchronous start and stop of the dust collection component. The ratchet disc cooperates with a cross-shaped rotary table at the active end of the inkjet printing conveyor belt to achieve intermittent transmission, ensuring precise matching between the stopping state of the inkjet printing conveyor belt and the inkjet printing action of the laser inkjet printer, guaranteeing no displacement of the cigarette box during the inkjet printing process. The first cam dial is driven by a first linkage component. The laser marking machine reciprocates up and down along a sliding member, which includes a sleeve fixedly connected to the laser marking machine and a sliding rod fixedly connected to a support frame. The sleeve is slidably fitted onto the sliding rod to ensure a stable focusing distance for the marking machine. The second cam dial is set at a preset angle to the first cam dial. The second cam dial triggers the jog switch of the dust collection component through a second linkage, so that the dust collection component starts immediately after the laser marking machine completes the marking, quickly removing the marking dust. The dust collection component includes a light-shielding dust cover fixedly connected to the support frame and a vacuum cleaner. The jog switch is fixedly connected to the side of the vacuum cleaner and corresponds to the second linkage. The light-shielding dust cover covers the marking area of ​​the marking conveyor belt, forming a closed dust collection space with the vacuum cleaner.

[0007] Preferably, the cross-shaped turntable is fixed to the active end shaft of the inkjet conveyor belt, with actuation grooves at the four corners and an arc groove between adjacent actuation grooves. An actuation rod with actuation block is fixed to the ratchet disc, the actuation block can be inserted into the actuation groove, and the bottom of the ratchet disc can be fitted into the arc groove to ensure stability during intermittent transmission and further ensure the accurate stopping position of the inkjet conveyor belt.

[0008] Preferably, the first linkage component and the second linkage component have the same structure, both including a positioning sleeve and a T-shaped linkage rod penetrating the positioning sleeve. The positioning sleeve is fixedly connected to the support frame. A roller is rotatably mounted on the side end of the T-shaped linkage rod. The roller of the first linkage component is in contact with the driving surface of the first cam dial, and the roller of the second linkage component is in contact with the driving surface of the second cam dial. A return spring is sleeved on the T-shaped linkage rod of the second linkage component. The two ends of the return spring are respectively fixed to the end face of the positioning sleeve and the end of the T-shaped linkage rod, so as to realize the rapid reset of the second linkage component and ensure the accuracy of the start and stop triggering of the vacuuming component.

[0009] Preferably, the auxiliary conveying device includes an auxiliary conveyor belt, a conveying limiter, a stop block, a pushing assembly, and an auxiliary plate. The auxiliary conveyor belt has multiple auxiliary protrusions fixed at equal intervals along the conveying direction to separate cigarette boxes and prevent them from stacking. A notch is provided on the active end side. The stop block is fixed to the upper end of the active end of the auxiliary conveyor belt for positioning the cigarette boxes. The pushing assembly includes an electric push rod and a pushing block fixed to the output end of the electric push rod. The pushing block can pass through the notch. The auxiliary plate is fixed to the bottom of the notch on the auxiliary conveyor belt, fixed to the support frame, and fitted to the inkjet printing conveyor belt to ensure that the cigarette boxes are smoothly transferred to the inkjet printing conveyor belt.

[0010] Preferably, the conveying limiting component includes a fixed plate and a third limiting plate. The fixed plate is fixed to the support frame and located on one side of the conveying surface of the auxiliary conveyor belt. The third limiting plate is located on the opposite side of the fixed plate, and a second adjusting component is fixed to its side. The second adjusting component extends out of the support frame and is locked. The second adjusting component includes a fixed rod that passes through the support frame and through an adjusting sleeve. The adjusting sleeve is fixed to the support frame, and a locking bolt is screwed onto the adjusting sleeve. By adjustment, it can adapt to the conveying limiting requirements of cigarette boxes of different specifications.

[0011] Preferably, the coding limiting component includes a first limiting plate and a second limiting plate arranged opposite to each other. Both of the opposite surfaces are fixed with a rubber layer to provide a buffer and anti-slip function. Both sides are fixed with a first adjusting member. The first adjusting member extends out of the support frame and is locked. The first adjusting member and the second adjusting member have the same structure. An arc-shaped elastic plate is fixed to the side end of the first limiting plate to guide and buffer the cigarette box when it enters the coding station, so as to avoid jamming or tipping.

[0012] Preferably, a cleaning component is movably connected to the inkjet printing limiting component. The cleaning component includes a housing and multiple roller brushes that are rotatably installed inside the housing. Multiple positioning screws are fixed to the bottom surface of the housing. The positioning screws are inserted into the positioning through holes of the inkjet printing limiting component and fixed by locking nuts. The roller brushes can clean the dust on the surface of the cigarette box before inkjet printing to avoid affecting the clarity of the inkjet printing.

[0013] Preferably, the vacuum cleaner's suction tube is inserted at an angle into the light-shielding dust cover and faces the output end of the laser marking machine, which improves the targeting and efficiency of dust removal and avoids dust residue on the cigarette box surface or the marking terminal.

[0014] Preferably, the preset angle is set according to the coding time to ensure that after the laser coding machine completes coding, the second cam dial drives the second linkage to trigger the dust collection component to start.

[0015] A method for implementing a fully automatic inkjet printing device for cigarette box production includes the following steps:

[0016] Step 1: Equipment Specification Adaptation and Core Parameter Calibration

[0017] Based on the width W and height H of the cigarette box to be printed, adjust the first adjusting component so that the distance between the first limiting plate and the second limiting plate is W ± 0.1 mm, and adjust the second adjusting component so that the distance between the fixed plate and the third limiting plate is W + 0.2 mm.

[0018] Adjust the positioning screw and locking nut of the cleaning component so that the contact pressure between the roller brush and the cigarette box surface is 0.05-0.1N;

[0019] The parameters are entered through the main controller: cigarette box specifications, width W, height H, coding time t1, t1 is 0.3-1.0s, and the reference speed of the drive motor n0, which must satisfy n0=60×k / t1, where k is the number of cigarette boxes conveyed per revolution of the ratchet disc, which is consistent with the number of grooves on the cross-shaped turntable.

[0020] The preset angle between the first cam dial and the second cam dial is set according to the coding time t1: 60° when t1=0.3-0.5s, 75° when t1=0.5-0.8s, and 90° when t1=0.8-1s.

[0021] Step 2: Precise loading and transfer of cigarette boxes

[0022] Place the cigarette boxes between the conveyor limiters of the auxiliary conveyor belt, ensuring the spacing between the cigarette boxes matches the spacing between the auxiliary convex plates. Start the auxiliary conveyor belt with a conveying speed of v1 = 0.2-0.5 m / s.

[0023] When the photoelectric sensor at the gap of the auxiliary conveyor belt detects that the cigarette box is positioned by the stop block, it triggers the electric push rod after a delay of 0.1s. The push block pushes the cigarette box into the inkjet printing conveyor belt at a speed of 0.3m / s. After being guided by the arc-shaped elastic plate, it enters the inkjet printing limit assembly.

[0024] Step 3: Intermittent conveying linkage of the inkjet printing conveyor belt

[0025] The main controller starts the drive motor at the reference speed n0, and the ratchet disk drives the cross-shaped turntable to rotate intermittently.

[0026] When the actuating block is inserted into the actuating groove, the inkjet conveyor belt transports one cigarette box spacing; when the actuating block is disengaged, the inkjet conveyor belt stops, and the stopping time is the same as the inkjet printing time t1.

[0027] Step 4: Precise laser marking

[0028] The first cam dial drives the first linkage component, causing the laser marking machine to move downward along the sliding component. The downward movement is the sum of H and the focusing distance. This downward movement is used as the initial distance, and the preset value of the focusing distance is 5-8mm.

[0029] After the laser marking machine moves down to the position, it starts marking. The marking time is matched with the pause time t1. After completion, it moves back up along the sliding part under its own gravity.

[0030] Step 5: Synchronize the start and stop of the vacuuming components.

[0031] After the inkjet printing is completed, the second cam dial drives the second linkage to compress the reset spring, triggering the jog switch of the vacuum cleaner. When the vacuum cleaner is vacuuming, its air intake generates an instantaneous wind speed of 15-20 m / s. This instantaneous wind speed corresponds to an air volume of ≥120 m³ / h, and the continuous vacuuming time of the instantaneous wind speed is 0.2-0.3 s.

[0032] After the second cam dial drive surface disengages, the reset spring drives the second linkage to reset, and the vacuum cleaner stops running.

[0033] Step 6: Cyclic Operation and Dynamic Rhythm Adjustment

[0034] The inkjet printing conveyor belt starts again, transporting the finished cigarette box to the next process. At the same time, the next cigarette box is transferred to the inkjet printing station, and steps 3-5 are repeated.

[0035] The main controller collects data in real time: conveying pause error ≤ ±0.02s, focusing distance fluctuation ≤ ±0.05mm, dust removal efficiency ≥98%, and dynamically adjusts the drive motor speed ±5r / min or the limit component spacing when the threshold is exceeded.

[0036] Advantages of this invention:

[0037] By using a single drive motor to coaxially drive the ratchet disc, the first cam dial, and the second cam dial, the intermittent conveying of the inkjet printing conveyor belt, the up-and-down reciprocating inkjet printing of the laser inkjet printer, and the start and stop of the dust collection component are integrated and linked. This ensures that the downward inkjet printing of the laser inkjet printer is precisely matched with the stopping action of the conveyor belt, and the focusing distance of the inkjet head is stable, completely solving the problems of inkjet misalignment and character breakage caused by traditional multi-motor control. At the same time, by preset the included angle of the two cam dials, it is ensured that the dust collection starts synchronously after the laser inkjet printing is completed, quickly removing the dust generated by the laser inkjet printing, preventing dust from adhering to the surface of the cigarette box or the inkjet head, and ensuring the clarity and consistency of the laser inkjet printing.

[0038] The auxiliary conveying mechanism effectively separates cigarette boxes through auxiliary convex plates, and with the help of adjustable conveying limiters and stop blocks for positioning, it prevents cigarette boxes from stacking or tipping over; the adjustable limit plate and arc-shaped elastic plate guide structure of the inkjet printing limit component can quickly adapt to cigarette boxes of different specifications, ensuring the stability of the cigarette box's upright posture, so that the laser inkjet printer is always aligned with the preset inkjet printing area, and the inkjet printing position deviation is controlled within a very small range, significantly improving the accuracy of laser inkjet printing;

[0039] The cleaning component's roller brush structure can clean dust from the cigarette box surface before laser coding, preventing dust from affecting the laser focusing effect and preventing blurry coding. The light-shielding dust cover and the inclined dust suction duct form a closed and precise dust suction space. Combined with the jog dust control, it reduces energy consumption while efficiently removing laser coding dust. At the same time, the light-shielding dust cover can reduce laser scattering, ensure operational safety, and further improve the marking quality of laser coding.

[0040] The various adjustment components enable the equipment to quickly adapt to different sizes of cigarette boxes. The main controller's real-time acquisition of the action time of each station and dynamic speed adjustment function can be flexibly adjusted according to parameters such as laser marking time and cigarette box specifications, ensuring precise matching of the cycle time of each process of laser marking, conveying, and dust collection, avoiding cigarette box accumulation or waiting, significantly improving the production efficiency of laser marking operations, and meeting diverse production needs. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the structure described in this invention;

[0043] Figure 2 This is a schematic diagram of the axial structure described in this invention;

[0044] Figure 3 This is a schematic diagram of a partial structure of the driving component described in this invention. Figure 1 ;

[0045] Figure 4 This is a partial structural diagram of the driving component described in this invention. Figure 2 ;

[0046] Figure 5 This is a schematic diagram of the side view structure described in this invention;

[0047] Figure 6 As described in this invention Figure 5 Schematic diagram of the AA section structure;

[0048] Figure 7 This is a block diagram of the control system described in this invention.

[0049] In the diagram: 1. Inkjet printing conveyor belt; 2. Inkjet printing limit assembly; 3. Laser inkjet printer; 4. Sliding component; 5. Drive assembly; 6. Dust collection assembly; 7. First limit plate; 8. Second limit plate; 9. First adjusting component; 10. Cleaning assembly; 11. Cross-shaped turntable; 12. Ratchet; 13. Actuating lever; 14. Drive motor; 15. First cam dial; 16. Second cam dial; 17. First linkage component; 18. Second linkage component; 19. Light-shielding dust cover; 20. Vacuum cleaner; 21. Auxiliary conveyor belt; 22. Fixed plate; 23. Third limit plate; 24. Second adjusting component; 25. Stop block; 26. Pushing assembly; 27. Auxiliary convex plate; 28. Arc-shaped elastic plate; 29. ​​Housing; 30. Roller brush; 31. Positioning screw; 32. Locking nut; 33. Cigarette box. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] like Figure 1 - Figure 7 As shown, the fully automatic inkjet printing device for cigarette box production includes an inkjet printing conveyor belt 1 installed on a support frame. The inkjet printing conveyor belt 1 is rotatably mounted on the support frame and serves as the main conveying carrier for cigarette boxes 33. Its active end is connected to the drive assembly 5 to obtain conveying power; its driven end is connected to the auxiliary conveying device to receive cigarette boxes 33 fed in by the auxiliary conveying device, thereby realizing the conveying of cigarette boxes to the inkjet printing station.

[0052] An auxiliary conveying device is fixed to the support frame and installed on the driven end side of the inkjet conveyor belt 1. It is used to assist in conveying the cigarette box 33 into the inkjet conveyor belt 1, and includes:

[0053] The auxiliary conveyor belt 21 is rotatably mounted on the support frame. Multiple auxiliary protrusions 27 are fixed at equal intervals along the conveying direction on the conveying surface. The auxiliary protrusions 27 separate and push the cigarette box 33 to move, so as to avoid stacking during the conveying process. A notch is opened on the active end side. A stop block 25 is fixed on the upper end of the active end and fixed to the support frame. The stop block 25 is used to block the cigarette box 33 so that it is accurately positioned at the notch.

[0054] The conveying limiting component includes a fixed plate 22 and a third limiting plate 23. The fixed plate 22 is fixed to the support frame and located on one side of the conveying surface of the auxiliary conveyor belt 21. The third limiting plate 23 is located on the opposite side of the fixed plate 22. A second adjusting component 24 is fixed to its side. The second adjusting component 24 passes through the support frame and is locked. It includes a fixed rod that passes through the support frame and through an adjusting sleeve. The adjusting sleeve is fixed to the support frame and a locking bolt is screwed onto the adjusting sleeve. The distance between the two components can be changed by adjustment to adapt to different specifications of cigarette boxes 33. The two components are used to limit and clamp the cigarette box 33 to be printed. At the same time, an auxiliary plate is fixed at the bottom of the notch of the auxiliary conveyor belt 21. The auxiliary plate is fixed to the support frame and fits the printing conveyor belt 1 to ensure the smooth transfer of the cigarette box 33.

[0055] The pushing component 26 includes a pushing block and an electric push rod. The pushing block fits against the side of the stop block 25 and can pass through the notch. One side is connected to the electric push rod, and the electric push rod is fixed to the stop block 25 through the connecting frame. The other side is provided with a rubber layer. After the cigarette box 33 is positioned at the notch, the electric push rod drives the pushing block to pass through the notch, pushing the vertical cigarette box 33 into the inkjet conveyor belt 1 and into the inkjet limiting component 2.

[0056] The coding limiting component 2 is fixed to the support frame and is set on the conveying surface of the coding conveyor belt 1. It is used to limit the posture of the cigarette box 33 to ensure coding accuracy. It includes a first limiting plate 7, a second limiting plate 8, a first adjusting component 9, an arc-shaped elastic plate 28, and a cleaning component 10.

[0057] The first limiting plate 7 and the second limiting plate 8 are respectively attached to the conveying surface of the inkjet conveyor belt 1. The opposite surfaces are both fixed with a rubber layer, which can buffer and prevent slipping, ensuring the stability of the cigarette box 33 standing upright. The sides are connected to the first adjusting member 9, which has the same structure as the second adjusting member 24. The first adjusting member 9 passes through the support frame and is locked. The distance between the two is adjusted to adapt to the specifications of the cigarette box, so that the cigarette box passes through upright and ensures the stability of the inkjet printing posture.

[0058] The first limiting plate 7 and the second limiting plate 8 can control the clamping and positioning accuracy of the cigarette box, for example, within ±0.1mm, to ensure that the focal point of the laser marking machine 3 is always aligned with the preset marking area of ​​the cigarette box 33, and to avoid the marking position deviation caused by the offset of the cigarette box 33; the horizontal distance between the end of the limiting plate near the marking station and the marking head of the laser marking machine 3 is fixed, and with the guiding action of the sliding part 4, the focal distance between the marking head of the laser marking machine 3 and the surface of the cigarette box 33 remains consistent after each downward movement, ensuring uniform marking clarity;

[0059] The arc-shaped elastic plate 28 is fixed to the side end of the first limiting plate 7, which corresponds to the driven end of the inkjet conveyor belt 1. It is used to guide and buffer the cigarette box 33 transferred to the inkjet conveyor belt 1 to avoid jamming or tipping.

[0060] The cleaning component 10 includes a housing 29, roller brushes 30, positioning screws 31, and locking nuts 32. Multiple roller brushes 30 are rolled inside the housing 29 along the conveying direction. The roller brushes 30 contact the surface of the cigarette box 33 to clean the dust and impurities on its surface to ensure the clarity of the inkjet printing. The positioning screws 31 on the bottom surface of the housing 29 are inserted into the positioning through holes of the inkjet printing limit component 2 and are fixed by screwing the locking nuts 32, which facilitates disassembly, assembly, and position adjustment.

[0061] The drive assembly 5 is fixed to the support frame and connected to the drive end of the inkjet conveyor belt 1. It is used to drive the inkjet conveyor belt to transport intermittently, synchronously drive the laser inkjet printer to move and start the dust collection assembly. It is mainly used to solve the technical problems of asynchronous inkjet printing and conveying and delayed dust collection start caused by traditional multi-motor independent control. It abandons the traditional multi-motor independent control mode. It includes a cross-shaped turntable 11, a ratchet disc 12, a toggle lever 13, a drive motor 14, a first cam dial 15, a second cam dial 16, a first linkage 17 and a second linkage 18.

[0062] The cross-shaped turntable 11 is fixed to the active end shaft of the inkjet conveyor belt 1. It has actuation grooves at the four corners and arc grooves between adjacent grooves, which are used to cooperate with the ratchet disc 12 to achieve intermittent transmission.

[0063] The drive motor 14 is fixed to the support frame, and the output shaft is connected to the ratchet disk 12. The bottom of the ratchet disk 12 can be embedded in the arc-shaped groove of the cross-shaped turntable 11. A toggle rod 13 with a toggle block is fixed on the ratchet disk 12. The toggle block can be inserted into the toggle groove. When the drive motor 14 drives the ratchet disk 12 to rotate, the toggle block toggle the cross-shaped turntable 11 to rotate intermittently, thereby driving the inkjet conveyor belt 1 to rotate intermittently.

[0064] The first cam dial 15 and the second cam dial 16 are fixedly mounted on the output shaft of the drive motor. Their driving surfaces form a preset angle, typically set within the range of 60° to 90°, to ensure timely dust extraction after coding is completed. The first linkage 17 and the second linkage 18 have identical structures, including a T-shaped linkage rod and a positioning sleeve. The positioning sleeve is fixedly connected to a support frame. The T-shaped linkage rod passes through the sleeve and has a roller mounted on its side. The roller of the first linkage 17 is in contact with the driving surface of the first cam dial 15, and its connecting rod is connected to the laser coding machine 3. The roller of the second linkage 18... The wheel is in contact with the driving surface of the second cam dial 16, and its end is directly opposite the jog switch of the dust collection component 6. A return spring is sleeved on the T-shaped linkage rod of the second linkage component 18. The two ends of the return spring are respectively fixed to the end face of the positioning sleeve and the end of the T-shaped linkage rod, which is used for the quick reset of the second linkage component 18 to ensure the positional accuracy of the next triggering of the jog switch. The rotation of the first cam dial 15 and the second cam dial 16 pushes the roller, causing the first linkage component 17 and the second linkage component 18 to reciprocate, thereby driving the laser marking machine to move and triggering the dust collection component 6.

[0065] The laser marking machine 3 is located above the marking conveyor belt 1 and is used for marking cigarette boxes 33. A sliding component 4 is fixedly connected to its top, which includes a sleeve and a sliding rod. The sleeve is connected to the laser marking machine 3 and the sliding rod is connected to the support frame. The sleeve is slidably fitted onto the sliding rod to provide guidance for the laser marking machine 3 to move up and down and to ensure the accuracy of the marking position.

[0066] The laser marking machine 3 can emit a continuous laser beam from its inkjet nozzle. The main controller can preset the printing content and support the printing of fixed and variable information such as production date and batch code. During the printing process, the laser beam is focused on the surface of the cigarette box 33 and forms a clear mark through burning. The mark is wear-resistant and does not easily fall off, which meets the traceability and anti-counterfeiting requirements of the cigarette box 33 production.

[0067] The dust collection component 6 is fixed to the support frame and set up corresponding to the coding station. It is used to remove coding dust and odors, and includes a light-shielding dust cover 19 and a vacuum cleaner 20.

[0068] The light-shielding and dustproof cover 19 is fixed to the support frame and the coverage area completely covers the coding station, so that the dust generated by laser coding is concentrated in the enclosed space. With the inclined dust suction duct, the coding dust can be quickly removed, avoiding dust from adhering to the surface of the cigarette box 33 or the coding station, ensuring that subsequent coding is not affected by dust and guaranteeing the stability of coding quality.

[0069] The vacuum cleaner 20 is fixed to the support frame. The suction tube is inserted obliquely into the light-shielding dust cover and faces the output end of the laser marking machine 3 for precise removal of marking dust. A jog switch is fixed to its side end and is electrically connected to the vacuum cleaner 20. The jog switch is directly opposite the end of the second linkage 18. The movement of the second linkage 18 triggers the switch to start the vacuum cleaner 20 and realize the dust collection.

[0070] Actual work process:

[0071] According to the cigarette box 33 specification, operate the second adjusting component 24 to adjust the spacing of the conveying limit component, and operate the first adjusting component 9 to adjust the spacing of the inkjet printing limit component to adapt to the cigarette box size.

[0072] Place the vertical cigarette box between the conveyor limiters of the auxiliary conveyor belt 21, start the auxiliary conveyor belt, and the auxiliary convex plate 27 pushes the cigarette box to the active end. The cigarette box is positioned by the stop block 25 at the notch.

[0073] The electric push rod of the push component 26 is activated, and the push block pushes the positioning cigarette box into the inkjet conveyor belt 1. The cigarette box is guided and buffered by the arc-shaped elastic plate 28 and enters the inkjet limiting component 2 to maintain its upright stability.

[0074] When the drive motor 14 is started, the actuating block of the ratchet disk 12 is inserted into the groove of the cross-shaped turntable 11, causing the cross-shaped turntable 11 to rotate intermittently, thereby driving the inkjet conveyor belt 1 to intermittently transport the cigarette box 33. At the same time, the drive motor 14 also synchronously drives the first cam dial 15 and the second cam dial 16 to rotate, so that the first linkage 17 and the second linkage 18 perform corresponding movements.

[0075] The T-shaped linkage rod of the first linkage 17 moves up and down due to its own weight and the driving action of the first cam dial 15, thereby driving the laser marking machine 3 to move up and down along the sliding member 4; in conjunction with the intermittent conveying action of the marking conveyor belt 1, when the marking conveyor belt 1 stops, the laser marking machine 3 slides down and inserts into the light shield and dust cover 19, facing the cigarette box 33 to complete the marking operation.

[0076] When the inkjet printing conveyor belt 1 stops, its conveying surface forms a rigid positioning with the inkjet printing limit component 2, without any displacement deviation; after the laser inkjet printer 3 moves down to the preset inkjet printing height, it immediately starts printing. The printing time is precisely matched with the intermittent pause time of the drive motor 14, ensuring that the inkjet printing conveyor belt 1 starts conveying again after the inkjet printing is completed, avoiding inkjet printing blurring and line breakage caused by the movement of the cigarette box 33 during the inkjet printing process.

[0077] Since there is a preset angle between the first cam dial 15 and the second cam dial 16, when the laser marking machine 3 completes the marking and moves upward, the second cam dial 16 drives the T-shaped linkage rod of the second linkage 18 to move, so that its end contacts the jog switch, thereby triggering the vacuum cleaner 20 to start and perform vacuuming operation on the marking area inside the light shield dust cover 19.

[0078] The second cam dial 16 rotates continuously. After its driving surface disengages from the roller of the second linkage 18, the T-shaped linkage rod of the second linkage 18 returns to its initial position by utilizing the reset action of the reset spring, disengaging from the jog switch, and the vacuum cleaner 20 stops running. This cycle repeats, achieving intermittent coding and synchronous vacuuming of the cigarette box 33.

[0079] The T-shaped linkage rod of the first linkage component 17 is rigidly connected to the laser marking machine 3. The overall weight of the laser marking machine 3 forms a stable downward reset driving force. Its gravity value is optimized to match the driving surface slope of the first cam dial 15, ensuring that it is greater than the sum of the sliding friction between the T-shaped linkage rod and the positioning sleeve and the guiding friction between the laser marking machine 3 and the sliding component 4.

[0080] Meanwhile, the sleeve of the sliding member 4 and the sliding rod adopt a high-precision clearance fit, and the contact surface is coated with a low-friction and wear-resistant coating to further reduce the reset resistance; the driving surface of the first cam dial 15 is a smooth involute profile. When the driving surface is disengaged from the roller of the first linkage member 17, the laser marking machine 3 moves vertically downward along the sliding member 4 to reset under its own gravity. The reset stroke is precisely limited by the cam profile, with no risk of offset or jamming, ensuring that it quickly returns to the initial position after each marking and meets the rhythm consistency of intermittent marking.

[0081] The second linkage 18 precisely triggers the jog switch of the vacuum assembly 6. High precision is required for the reset position. The reset spring, fitted onto the T-shaped linkage rod of the second linkage 18, has its effective number of turns optimized through calculation. This ensures that when the second cam dial 16 drives the T-shaped linkage rod, the reset spring can be smoothly and steadily stretched with the displacement of the T-shaped linkage rod, without any jamming or obstruction. Simultaneously, the free length of the reset spring is matched to the stretching stroke, ensuring uniform stress distribution during stretching and preventing uneven stretching caused by localized stress concentration. The tensile stiffness of the reset spring is precisely matched to the driving force of the second cam dial 16, with the driving force exceeding the spring's tensile resistance. This allows the spring to stretch smoothly and synchronously with the rotation of the cam drive surface, ensuring that the second linkage 18 can trigger the jog switch in a timely manner and that the vacuum assembly 6 can start and stop synchronously according to the preset rhythm.

[0082] During the cigarette box conveying process, the roller brush 30 of the cleaning component 10 cleans the surface impurities; after the coding is completed, the drive motor 14 drives the ratchet disk 12 to drive the coding conveyor belt 1 again, and transports the coded cigarette box 33 to the next process. At the same time, the next cigarette box is transferred to the coding station, and the above process is repeated to achieve fully automatic continuous coding.

[0083] like Figure 7 As shown, this embodiment illustrates the implementation method of a fully automatic inkjet printing device for cigarette box production. Taking a cigarette box with dimensions "width W=80mm, height H=100mm" as an example, the specific execution process of the implementation method is explained in detail below:

[0084] Step 1: Equipment specification adaptation and core parameter calibration (laying the foundation for collaboration)

[0085] The core purpose of this step is to ensure that each component of the device is matched to the cigarette box specifications in advance through precise adaptation and parameter calibration, thus providing the prerequisite for the subsequent three-function collaboration of a single motor and avoiding synchronization errors caused by improper adaptation.

[0086] Cigarette box limit distance adjustment: Loosen the locking bolt of the first adjusting component 9 and move the first limiting plate 7 and the second limiting plate 8 to a distance of 80±0.1mm, ensuring that the cigarette box does not wobble or get squeezed when standing upright; operate the second adjusting component 24 to adjust the distance between the fixing plate 22 and the third limiting plate 23 to 80.2mm, ensuring smooth conveying and preventing the cigarette box from shifting. This distance setting is based on the cigarette box production tolerance of ±0.1mm, taking into account both stability and adaptability.

[0087] Cleaning component adjustment: Loosen the locking nut 32 of the cleaning component 10, move the housing 29 up and down, so that the contact pressure between the roller brush 30 and the cigarette box surface reaches 0.08N (calibrated with the assistance of a pressure sensor). If the pressure is too high, it will damage the surface of the cigarette box, and if it is too low, it will not be able to thoroughly clean the dust. This range has been verified by multiple tests and can achieve a balance between cleaning effect and cigarette box protection. Then tighten the locking nut 32 to lock the position.

[0088] Core parameter input: The cigarette box specifications (width 80mm, height 100mm) and the coding time t1=0.6s are entered through the main controller (12 characters for printing production date and batch number, character width 1.5mm, matching the conventional coding speed); According to the formula n0=(60×k) / t1, where k=4 (the cross-shaped turntable 11 has 4 actuating grooves), n0=(60×4) / 0.6=400r / min is calculated. This formula ensures that the drive motor speed and the coding cycle are accurately matched.

[0089] Cam angle setting: Since t1=0.6s is in the range of 0.5-0.8s, the preset angle between the first cam dial 15 and the second cam dial 16 is set to 75°. This angle has been verified by dynamic simulation to ensure that dust suction is triggered instantly after the inkjet printing is completed, without any delay or premature start-up.

[0090] Step 2: Precise feeding and transfer of cigarette boxes (ensuring feeding stability)

[0091] This step, through timing control and speed matching, ensures that the cigarette boxes enter the coding station smoothly, avoiding stacking, tipping, or positional deviation during the loading process, thus guaranteeing accurate coding in the future.

[0092] Material preparation: Place the vertical cigarette boxes between the fixed plate 22 and the third limiting plate 23 of the auxiliary conveyor belt 21 in sequence. The spacing between the cigarette boxes should be consistent with the spacing of the auxiliary convex plates 27 (100mm) to prevent squeezing and collision during the conveying process. Start the auxiliary conveyor belt 21 and set the conveying speed v1=0.3m / s. This speed is matched with the intermittent conveying rhythm of the inkjet printing conveyor belt 1 to avoid cigarette boxes accumulating or waiting.

[0093] Precise Push: When the cigarette box moves to the notch along the auxiliary conveyor belt 21, it is stopped and positioned by the stop block 25. After the photoelectric sensor detects the cigarette box, it sends a signal to the main controller. Considering that the cigarette box needs to stabilize for 0.1 seconds after positioning (to eliminate inertial shaking), the main controller delays the action of the electric push rod by 0.1 seconds. The push block passes through the notch at a speed of 0.3 m / s, smoothly pushing the cigarette box into the inkjet conveyor belt 1. The rubber layer on the side of the push block can buffer the impact force, and the auxiliary plate is set to fit snugly with the inkjet conveyor belt 1 to avoid jamming or tilting during the transfer of the cigarette box.

[0094] Guiding buffer: After the cigarette box enters the inkjet printing conveyor belt 1, it is guided by the arc-shaped elastic plate 28 on the side of the first limiting plate 7. The arc-shaped structure can disperse the contact stress, avoid the corners of the cigarette box from bumping, and ensure that the cigarette box enters the inkjet printing limiting component 2 in a stable upright posture.

[0095] Step 3: Intermittent conveying and linkage of the inkjet printing conveyor belt (to achieve synchronization of conveying and inkjet printing)

[0096] This step is the core implementation link of single-motor coordination. By cooperating with the ratchet disc and the cross-shaped turntable, the conveying action and the coding action are precisely synchronized, solving the synchronization difference problem of traditional multi-motor control.

[0097] Drive start: The main controller starts the drive motor 14 at the reference speed n0=400r / min. The output shaft of the drive motor drives the ratchet disk 12, the first cam dial 15, and the second cam dial 16 to rotate synchronously on the same axis, ensuring that there is no phase difference in the actions of the three.

[0098] Intermittent transmission: When the ratchet disc 12 rotates, its actuating block periodically inserts into the actuating groove of the cross-shaped turntable 11, driving the cross-shaped turntable 11 to rotate, thereby driving the inkjet conveyor belt 1 to move forward; when the actuating block disengages from the actuating groove, the bottom of the ratchet disc 12 rotates in contact with the arc-shaped groove of the cross-shaped turntable 11, the cross-shaped turntable 11 comes to a stop, and the inkjet conveyor belt 1 stops precisely. The arc-shaped groove design can avoid shaking during the intermittent process, ensuring that the stopping position error is ≤±0.02s, which is perfectly matched with the inkjet printing time t1=0.6s, providing stable working conditions for accurate inkjet printing.

[0099] Step 4: Laser marking machine accurately prints the markings (ensuring clarity and positional accuracy).

[0100] This step achieves precise lifting and focusing of the laser marking machine through the cooperation of cam drive and sliding guide, solving the problem of fluctuating focusing distance in traditional marking machines.

[0101] Precise downward movement: The first cam dial 15 rotates with the drive motor 14, and its driving surface pushes the roller of the first linkage 17, causing the T-shaped linkage rod to drive the laser marking machine 3 to move vertically downward along the sleeve-sliding rod structure of the sliding member 4. The sliding member 4 adopts a high-precision clearance fit (clearance ≤ 0.01mm), and the contact surface is coated with a low-friction wear-resistant coating to ensure no deviation during the downward movement; the downward movement stroke is calculated by the formula: 100mm (cigarette box height) + 6mm (focusing distance) = 106mm, ensuring that the focusing distance between the inkjet nozzle and the cigarette box surface is stable at 6mm ± 0.05mm.

[0102] Precise coding: After the laser coding machine 3 moves into position, the main controller triggers the coding signal, and the coding terminal emits a continuous laser beam to print characters according to the preset content. The coding time is strictly controlled to 0.6s, which is consistent with the pause time of the coding conveyor belt 1, to avoid blurry coding or broken lines due to the movement of the cigarette box.

[0103] Reset and upward movement: After the inkjet printing is completed, the driving surface of the first cam dial 15 disengages from the roller, and the laser inkjet printer 3 resets and moves upward along the sliding member 4 under its own gravity. The reset stroke is precisely limited by the cam profile, and it returns to the initial position to wait for the next action.

[0104] Step 5: Synchronize the start and stop of the vacuuming component (to achieve synchronization between inkjet printing and vacuuming).

[0105] This step utilizes the cam angle design and the coordination of the return spring to achieve a timing connection between the dust suction action and the coding action, solving the problem of dust residue caused by the dust suction delay in traditional equipment.

[0106] Synchronous Start-up: Because the first cam dial 15 and the second cam dial 16 form a preset angle of 75°, when the coding is completed, the second cam dial 16 rotates to the drive position, pushing the roller of the second linkage 18, causing the T-shaped linkage rod to compress the return spring, and triggering the momentary switch of the vacuum cleaner 20 at its end. After the vacuum cleaner 20 starts, the suction duct (tilted towards the output end of the inkjet head) sucks up the dust generated by the inkjet printing at a wind speed of 18m / s. The suction time is matched with the contact time of the drive surface of the second cam dial 16, set to 0.25s, to ensure that the dust is completely removed without wasting energy.

[0107] Precise Reset: As the second cam dial 16 continues to rotate, after the drive surface disengages from the roller, the rebound force of the reset spring (6 effective turns, tensile stiffness 2N / mm) drives the second linkage 18 to quickly reset, disengaging from the jog switch, and the vacuum cleaner 20 stops operating. The parameters of the reset spring have been optimized to ensure a reset position accuracy of ≤±0.01mm, avoiding affecting the next trigger.

[0108] Step 6: Cyclic Operation and Dynamic Cycle Adjustment (to ensure the stability of continuous operation)

[0109] This step, through cyclical operation and dynamic adjustment, ensures stable cycle time and coding quality during long-term equipment operation, adapting to diverse production needs.

[0110] Cyclic operation: The inkjet conveyor belt 1 starts again under the drive of the drive motor 14, and transports the cigarette boxes that have been inkjet-printed to the next process (such as the packaging process); at the same time, the auxiliary conveyor continuously pushes new cigarette boxes into the inkjet conveyor belt 1 and into the inkjet station, repeating steps 3-5 to achieve fully automatic continuous inkjet printing operation, with a production efficiency of 300-500 pieces / hour.

[0111] Dynamic adjustment: The main controller collects data from each workstation in real time through sensors: the pause error of the inkjet conveyor belt 1, the focusing distance fluctuation of the laser inkjet printer 3, and the dust removal efficiency of the vacuum cleaner 20. When a pause error > ±0.02s is detected, the main controller fine-tunes the reference speed of the drive motor 14 (e.g., adjusts it to 405r / min); when the focusing distance fluctuation > ±0.05mm, the spacing of the inkjet limit component 2 is fine-tuned through the first adjusting component 9; when the dust removal efficiency <98%, the system checks whether the dust suction duct is blocked and prompts for maintenance, ensuring that the cycle time of each process is always accurately matched and the inkjet quality is stable.

[0112] Through a closed-loop process of parameter calibration, precise feeding, synchronous linkage, and dynamic adjustment, the device has perfectly implemented the three-function collaboration of a single motor. Each step is deeply bound to the device structure, and the setting of specific parameters, timing control, and effect thresholds reflects non-obvious technical thinking. It solves problems such as synchronization difference, unstable focusing, and dust residue in traditional multi-motor equipment, and significantly improves the accuracy, efficiency, and cleanliness of cigarette box coding.

[0113] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fully automatic inkjet printing device for cigarette box production, comprising a support frame, an inkjet printing conveyor belt (1), an auxiliary conveying device, an inkjet printing limit assembly (2), a laser inkjet printer (3), a drive assembly (5), and a dust collection assembly (6), characterized in that: The drive assembly (5) uses a single drive motor (14) as the sole power source. Its output shaft is coaxially fixed with a ratchet disk (12), a first cam dial (15), and a second cam dial (16). Through the same power source, it synchronously drives the intermittent conveying of the inkjet conveyor belt (1), the up-and-down reciprocating inkjet printing of the laser inkjet printer (3), and the synchronous start and stop of the dust collection assembly (6). The ratchet disk (12) cooperates with the cross-shaped turntable (11) at the active end of the inkjet conveyor belt (1) to achieve intermittent transmission, so that the stopping state of the inkjet conveyor belt (1) is precisely matched with the inkjet printing action of the laser inkjet printer (3), ensuring that the cigarette box does not shift during the inkjet printing process. The first cam dial (15) drives the laser inkjet printer (3) to move up and down along the sliding member (4) through the first linkage (17). The sliding member (4) includes a laser... The inkjet printer (3) has a sleeve fixed to it and a sliding rod fixed to the support frame. The sleeve is slidably fitted onto the sliding rod to ensure the stability of the inkjet printer's focusing distance. The second cam dial (16) and the first cam dial (15) are set at a preset angle. The second cam dial (16) triggers the jog switch of the dust collection component (6) through the second linkage (18), so that the dust collection component (6) starts immediately after the laser inkjet printer (3) completes the inkjet printing and quickly removes the inkjet printing dust. The dust collection component (6) includes a light-shielding dust cover (19) fixed to the support frame and a vacuum cleaner (20). The jog switch is fixed to the side of the vacuum cleaner (20) and corresponds to the second linkage (18). The light-shielding dust cover (19) covers the inkjet printing area of ​​the inkjet printing conveyor belt (1) and forms a closed dust collection space with the vacuum cleaner (20).

2. The fully automatic inkjet printing device for cigarette box production according to claim 1, characterized in that: The cross-shaped turntable (11) is fixed to the active end shaft of the inkjet conveyor belt (1). It has actuation grooves at the four corners and an arc groove between adjacent actuation grooves. A lever (13) with actuation block is fixed on the ratchet disc (12). The actuation block can be inserted into the actuation groove. The bottom of the ratchet disc (12) can fit into the arc groove to ensure stability during intermittent transmission and further ensure the accurate stopping position of the inkjet conveyor belt (1).

3. The fully automatic inkjet printing device for cigarette box production according to claim 2, characterized in that: The first linkage (17) and the second linkage (18) have the same structure, both including a positioning sleeve and a T-shaped linkage rod that passes through the positioning sleeve. The positioning sleeve is fixed to the support frame. A roller is rotatably installed on the side end of the T-shaped linkage rod. The roller of the first linkage (17) is in contact with the driving surface of the first cam dial (15). The roller of the second linkage (18) is in contact with the driving surface of the second cam dial (16). A reset spring is sleeved on the T-shaped linkage rod of the second linkage (18). The two ends of the reset spring are respectively fixed to the end face of the positioning sleeve and the end of the T-shaped linkage rod, so as to realize the rapid reset of the second linkage (18) and ensure the accuracy of the start and stop triggering of the dust collection assembly (6).

4. The fully automatic inkjet printing device for cigarette box production according to claim 3, characterized in that: The auxiliary conveying device includes an auxiliary conveyor belt (21), a conveying limiter, a stop block (25), a pushing assembly (26), and an auxiliary plate. The conveying surface of the auxiliary conveyor belt (21) is fixed with multiple auxiliary protrusions (27) at equal intervals along the conveying direction to separate cigarette boxes and prevent them from stacking. A notch is opened on the active end side. The stop block (25) is fixed to the upper end of the active end of the auxiliary conveyor belt (21) for positioning the cigarette box. The pushing assembly (26) includes an electric push rod and a pushing block fixed to the output end of the electric push rod. The pushing block can pass through the notch. The auxiliary plate is fixed at the bottom of the notch of the auxiliary conveyor belt (21), fixed to the support frame, and fitted to the inkjet printing conveyor belt (1) to ensure that the cigarette box is smoothly transferred to the inkjet printing conveyor belt (1).

5. The fully automatic inkjet printing device for cigarette box production according to claim 4, characterized in that: The conveying limiting component includes a fixed plate (22) and a third limiting plate (23). The fixed plate (22) is fixed to the support frame and located on one side of the conveying surface of the auxiliary conveyor belt (21). The third limiting plate (23) is located on the opposite side of the fixed plate (22), and a second adjusting component (24) is fixed on its side. The second adjusting component (24) extends out of the support frame and is locked. The second adjusting component (24) includes a fixed rod, which passes through the support frame and through the adjusting sleeve. The adjusting sleeve is fixed on the support frame, and a locking bolt is screwed onto the adjusting sleeve. It can be adjusted to meet the conveying limiting requirements of cigarette boxes of different specifications.

6. The fully automatic inkjet printing device for cigarette box production according to claim 5, characterized in that: The inkjet printing limiting component (2) includes a first limiting plate (7) and a second limiting plate (8) arranged opposite to each other. Both of them have a rubber layer fixed to their opposite surfaces to provide a buffer and anti-slip function. Both sides are fixed with a first adjusting member (9). The first adjusting member (9) extends out of the support frame and is locked. The first adjusting member (9) and the second adjusting member (24) have the same structure. An arc-shaped elastic plate (28) is fixed to the side end of the first limiting plate (7) to provide guidance and buffer when the cigarette box enters the inkjet printing station, so as to avoid jamming or tipping.

7. The fully automatic inkjet printing device for cigarette box production according to claim 6, characterized in that: A cleaning component (10) is movably connected to the coding limiting component (2). The cleaning component (10) includes a housing (29) and multiple roller brushes (30) that are rolled inside the housing. Multiple positioning screws (31) are fixed to the bottom surface of the housing (29). The positioning screws (31) are inserted into the positioning through holes of the coding limiting component (2) and fixed by locking nuts (32). The roller brushes (30) can clean the dust on the surface of the cigarette box before coding to avoid affecting the clarity of the coding.

8. The fully automatic inkjet printing device for cigarette box production according to claim 7, characterized in that: The suction tube of the vacuum cleaner (20) is inserted at an angle into the light-shielding dust cover (19) and faces the output end of the laser marking machine (3) to improve the targeting and efficiency of dust removal and avoid dust residue on the surface of the cigarette box or the printing port.

9. The fully automatic inkjet printing device for cigarette box production according to claim 8, characterized in that: The preset angle is set according to the coding time to ensure that after the laser coding machine (3) completes coding, the second cam dial (16) drives the second linkage (18) to trigger the dust collection component (6) to start.

10. A method for implementing a fully automatic inkjet printing device for cigarette box production, based on the fully automatic inkjet printing device for cigarette box production according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Equipment Specification Adaptation and Core Parameter Calibration According to the width W and height H of the cigarette box (33) to be printed, adjust the first adjusting member (9) so that the distance between the first limiting plate (7) and the second limiting plate (8) is W±0.1mm, and adjust the second adjusting member (24) so ​​that the distance between the fixing plate (22) and the third limiting plate (23) is W+0.2mm; Adjust the positioning screw (31) and locking nut (32) of the cleaning component (10) so that the contact pressure between the roller brush (30) and the cigarette box surface is 0.05-0.1N; The parameters are entered through the main controller: cigarette box specifications, width W, height H, coding time t1, t1 is 0.3-1.0s, drive motor (14) reference speed n0, and satisfy n0=60×k / t1, k is the number of cigarette boxes driven and conveyed by the ratchet disc (12) per revolution, which is consistent with the number of grooves of the cross-shaped turntable (11); The preset angle between the first cam dial (15) and the second cam dial (16) is set according to the coding time t1: the angle is 60° when t1=0.3-0.5s, the angle is 75° when t1=0.5-0.8s, and the angle is 90° when t1=0.8-1s. Step 2: Precise loading and transfer of cigarette boxes Place the cigarette boxes (33) between the conveying limiters of the auxiliary conveyor belt (21), with the spacing between the cigarette boxes matching the spacing between the auxiliary convex plates (27). Start the auxiliary conveyor belt (21) with a conveying speed of v1 = 0.2-0.5 m / s. When the photoelectric sensor at the gap of the auxiliary conveyor belt (21) detects that the cigarette box is positioned by the stop block (25), it triggers the electric push rod after a delay of 0.1s. The push block pushes the cigarette box into the inkjet conveyor belt (1) at a speed of 0.3m / s. After being guided by the arc-shaped elastic plate (28), it enters the inkjet limiting component (2). Step 3: Intermittent conveying linkage of the inkjet printing conveyor belt The main controller starts the drive motor (14) at the reference speed n0, and the ratchet disk (12) drives the cross-shaped turntable (11) to rotate intermittently; When the actuating block is inserted into the actuating groove, the inkjet conveyor belt (1) conveys one cigarette box spacing; when the actuating block is disengaged, the inkjet conveyor belt (1) stops, and the stopping time is consistent with the inkjet printing time t1. Step 4: Precise laser marking The first cam dial (15) drives the first linkage (17), which in turn drives the laser marking machine (3) to move down along the sliding member (4). The downward stroke is the sum of H and the focusing distance. This downward stroke is used as the initial spacing. The preset value of the focusing distance is 5 to 8 mm. After the laser marking machine (3) moves down to the position, it starts marking. The marking time is matched with the pause time t1. After completion, it moves up along the sliding part (4) under its own gravity. Step 5: Synchronize the start and stop of the vacuuming components. After the inkjet printing is completed, the second cam dial (16) drives the second linkage (18) to compress the reset spring, triggering the jog switch of the vacuum cleaner (20). When the vacuum cleaner (20) is vacuuming, its air intake generates an instantaneous wind speed of 15-20 m / s. The instantaneous wind speed corresponds to an air volume ≥120 m³ / h, and the continuous vacuuming time of the instantaneous wind speed is 0.2-0.3 s. After the second cam dial (16) disengages from the driving surface, the reset spring drives the second linkage (18) to reset, and the vacuum cleaner (20) stops running; Step 6: Cyclic Operation and Dynamic Rhythm Adjustment The inkjet printing conveyor belt (1) is restarted to transport the finished cigarette box to the next process. At the same time, the next cigarette box is transferred to the inkjet printing station. Steps 3-5 are repeated. The main controller collects data in real time: conveying pause error ≤ ±0.02s, focusing distance fluctuation ≤ ±0.05mm, dust removal efficiency ≥98%, and dynamically adjusts the drive motor (14) speed ±5r / min or the limit component spacing when the threshold is exceeded.

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