Packaging machine with contrast roller self-cleaning function

Abstract

The application discloses a packaging machine with a counter roller self-cleaning function, and relates to the technical field of packaging machines.The packaging machine comprises a main machine, a trademark paper gluing mechanism, a main control system and an external self-cleaning module.The gluing wheel of the trademark paper gluing mechanism is accurately aligned with the counter roller.The self-cleaning module comprises an adaptive installation unit, a power driving unit, a motion conversion unit and a cleaning execution unit.The adaptive installation unit is detachably assembled, thereby avoiding inherent adjustment and maintenance areas of the equipment.The power driving unit outputs reciprocating linear motion, which is converted into rotary motion through the motion conversion unit, thereby driving the cleaning execution unit to approach or move away from the counter roller.The cleaning execution unit is flexibly attached to the counter roller through elastic cleaning pieces to remove dirt through friction, and a glue dirt collecting structure receives glue dirt, and a contact limiting structure controls the contact state.When the main control system detects a trademark paper stop supply or rejection signal, a self-cleaning cycle is triggered, thereby not affecting normal operation, effectively reducing quality defects and downtime failures, and improving equipment operation efficiency.

Description

Technical Field

[0001] This invention relates to the field of packaging machine technology, specifically to a packaging machine with a self-cleaning function for the backing roller. Background Technology

[0002] In the tobacco packaging production field, the YB45A packaging machine is a widely used core piece of equipment, adaptable to the packaging needs of different specifications of label paper, such as regular cigarettes (244.03mm long × 98mm wide) and slim cigarettes (262.23mm long × 77mm wide). In its label paper gluing mechanism, the gluing roller and the backing roller work together to complete the gluing: axially, they are aligned left and right; circumferentially, the gluing point corresponds to the raised surface of the backing roller and maintains a preset distance. As the gluing roller rotates, it picks up glue from the glue reservoir, which is then combed by the scraper and evenly coated onto the label paper through extrusion.

[0003] To address the issue of uneven glue application on traditional concave backing rollers, the YB45A packaging machine employs a flat, smooth backing roller. While this achieves complete adhesion between the label paper and the gluing roller, it also introduces new technical challenges: when label paper supply is interrupted or rejected, the gluing roller continues to rotate due to its anti-drying design, causing glue to directly adhere to the surface of the flat backing roller. Over time, this results in stubborn glue buildup. This buildup causes two major problems: firstly, it leads to a quality defect where the sharp corners of the label paper on small boxes turn white, severely impacting the product's appearance qualification rate; secondly, it causes blockages in the label paper conveyor, leading to equipment downtime and significantly reducing production efficiency.

[0004] Existing solutions have significant limitations: they lack dedicated self-cleaning devices adapted to the YB45A packaging machine's structure; traditional manual cleaning methods require machine shutdown, which is not only inefficient but also severely disrupts production continuity and results in inconsistent cleaning effectiveness; furthermore, the packaging machine's compact structure limits the installation space for external cleaning devices, and altering the main structure would significantly increase costs and potentially affect the operational stability of the existing equipment. Therefore, there is an urgent need for a technical solution that requires no modifications to the packaging machine, is easy to install, can accurately respond to operating conditions, and automatically removes adhesive residue from the backing rollers to address the aforementioned quality and efficiency challenges. Summary of the Invention

[0005] The core objective of this invention is to solve the quality and efficiency problems caused by glue buildup on the backing rollers of the existing YB45A packaging machine, and to provide a packaging machine with a self-cleaning function for the backing rollers. Specifically, it addresses the pain point of glue buildup on the backing rollers caused by the continuous rotation of the gluing wheel when label paper is stopped or rejected, leading to whitening of the sharp corners of small box labels and blockage of the label paper conveyor. The invention achieves automated removal of glue residue from the backing rollers, reducing quality defects and downtime. An external self-cleaning module is designed, requiring no modification to the main structure of the packaging machine, adapting to the existing equipment layout, avoiding inherent adjustment and maintenance areas, ensuring convenient installation and not affecting existing maintenance operations. Through the flexible contact friction between the elastic cleaning component and the backing roller, combined with a contact limiting structure, the contact state is precisely controlled, ensuring cleaning effectiveness while avoiding damage to the backing rollers from hard contact. The self-cleaning action is precisely linked to the packaging machine's operating conditions, performing cleaning only in workstations without label paper, without interfering with normal gluing operations, improving equipment stability and production efficiency. The maintenance process of the cleaning equipment is simplified. Through the detachable and adjustable structural design, the cost and labor intensity of manual maintenance are reduced, and the service life of the equipment is extended.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a packaging machine with a self-cleaning function for a backing roller, comprising a main unit, a label paper gluing mechanism, and a main control system. The label paper gluing mechanism includes a gluing wheel, a glue storage tray, a glue scraper, and a backing roller. In the axial direction, the gluing wheel and the backing roller are aligned horizontally, and in the circumferential direction, the gluing points correspond to the raised surfaces of the backing roller and maintain a preset distance. It also includes an external self-cleaning module that is linked to the main control system signal, the self-cleaning module comprising: The adapter unit can be detachably mounted on the longitudinal channel of the packaging machine's backing roller, adapting to the existing equipment space layout and avoiding the equipment's inherent adjustment structure and maintenance operation area. The power drive unit, installed in the adapter mounting unit, is capable of outputting reciprocating linear motion power; The motion conversion unit connects the power drive unit and the cleaning execution unit, and can convert reciprocating linear motion into rotary motion; The cleaning execution unit, driven by the motion conversion unit, can approach or move away from the lining roller. It includes an elastic cleaning element, a sludge collection structure, and a contact limiting structure. The elastic cleaning element can flexibly adhere and rub against the surface of the rotating lining roller. The sludge collection structure receives the sludge scraped off by the elastic cleaning element. The contact limiting structure limits the contact pressure and angle between the elastic cleaning element and the lining roller. When the main control system detects a signal indicating that the label paper has stopped being supplied or has been rejected, it identifies the corresponding station without label paper. When the station reaches the preset station before the coating roller, it triggers the power drive unit to move. The motion conversion unit drives the cleaning execution unit to move towards the backing roller, so that the elastic cleaning component contacts the backing roller and removes the surface glue residue. After the corresponding station leaves the coating area, the power drive unit is controlled to reset, and the cleaning execution unit separates from the backing roller, completing one self-cleaning cycle.

[0007] To further optimize this invention, the following technical solutions may be preferred: Preferably, the adapter installation unit includes a rotatable movable frame, a rotating support, a transparent protective component, and a detachable fixing structure. The rotatable movable frame is hinged to the packaging machine body via the rotating support. The detachable fixing structure can lock or unlock the rotatable movable frame from the machine body. After unlocking, the rotatable movable frame can be rotated and laid down to expand the maintenance and operation space. The transparent protective component allows observation of the cleaning status and provides protection. The remaining structural components are made of high-strength rust-resistant material.

[0008] Preferably, the power drive unit includes a fixed base, a reciprocating drive component, and an angle compensation connector. The reciprocating drive component is fixed to the fixed base and adapted to the air supply system of the packaging machine, enabling low-speed and stable extension and retraction. The angle compensation connector connects the reciprocating drive component and the motion conversion unit, compensating for installation deviations and angle changes during the motion process, and ensuring the stability of power transmission.

[0009] Preferably, the motion conversion unit includes a transmission swing arm, a rotating shaft, and a support assembly. The rotating shaft is rotatably mounted on the adapter mounting unit via the support assembly. One end of the transmission swing arm is fixed to the rotating shaft, and the other end is hinged to the angle compensation connector of the power drive unit, which can efficiently convert the linear motion of the reciprocating drive component into the rotational motion of the rotating shaft. The support assembly ensures that the rotating shaft rotates without jamming.

[0010] Preferably, the elastic cleaning component of the cleaning execution unit is made of wear-resistant elastic material, and its cleaning end face is set parallel to the axis of the lining roller, which can completely fit the surface of the lining roller and avoid hard contact damage; the glue collection structure is an upward-facing trough, the length of which is adapted to the elastic cleaning component to ensure that the glue is completely collected; the contact limiting structure is a position-adjustable design, which can adjust the limiting distance according to the specifications of the lining roller and cleaning requirements.

[0011] Preferably, the main control system achieves precise timing control of the self-cleaning action through the workstation digital chain signal, triggering the corresponding workstation signal group when the label paper is stopped or rejected, and has a drive unit fault diagnosis function, which can detect the on / off status of the power control circuit in real time to ensure the reliable operation of the self-cleaning module.

[0012] Preferably, the cleaning execution unit further includes a detachable fixing structure, and the elastic cleaning component is connected to the sludge collection structure through the detachable fixing structure.

[0013] Preferably, the power drive unit, motion conversion unit and cleaning execution unit of the self-cleaning module form a linkage transmission chain, realizing the automated closed-loop operation of "signal recognition - power output - motion conversion - cleaning execution - reset standby" under the control of the main control system, and the cleaning action is only performed in the work area without label paper, without affecting the normal glue application operation.

[0014] The beneficial effects of this invention are mainly reflected in the following aspects: (1) This invention achieves automated removal of adhesive residue from the backing rollers through precise linkage between the external self-cleaning module and the main control system of the packaging machine. The cleaning action is performed only at the unfilled workstations where the label paper is not supplied or is rejected, without interfering with the normal glue coating operation. This effectively solves the problems of low efficiency and disruption of production continuity caused by traditional manual cleaning, significantly reduces the quality defects of white corners on small box label paper and the downtime caused by blockage of the label paper conveyor, and greatly improves the stability of equipment operation and the product qualification rate.

[0015] (2) The self-cleaning module's adapter installation unit adopts a detachable and rotatable design, which does not require modification of the main structure of the packaging machine. It can accurately adapt to the spatial layout of the YB45A packaging machine and avoid the inherent adjustment structure and maintenance operation area of ​​the equipment. After unlocking, it can be rotated and laid down to expand the working space without affecting the original maintenance operation of the equipment. It is convenient to install and maintain, and at the same time adapts to the usage needs of different specifications of packaging machines, with strong versatility.

[0016] (3) The cleaning unit uses a wear-resistant elastic material to flexibly rub against the lining roller. With the adjustable contact limit structure, it can accurately control the contact pressure and angle, which not only ensures the removal effect of glue residue, but also avoids damage to the surface of the lining roller caused by hard contact. The glue residue collection structure with the opening facing upward can promptly receive the scraped glue residue, prevent secondary pollution of the equipment, and further ensure the quality of product packaging.

[0017] (4) The power drive unit is equipped with angle compensation connectors, which can effectively compensate for installation deviations and angle changes during the movement process. Combined with the efficient power transmission of the motion conversion unit, it ensures that the cleaning action is smooth and accurate. Each mechanism is made of high-strength rust-proof material, which is sturdy and durable. The elastic cleaning parts are connected by a detachable fixed structure, which facilitates quick replacement and maintenance, extends the service life of the device, and reduces the cost of manual maintenance and labor intensity. Attached Figure Description

[0018] Figure 1 This is a transmission diagram of the glue coating system in a packaging machine; Figure 2 This is a schematic diagram of the adjustment of the backing roller in a packaging machine; Figure 3 Schematic diagram of the overall structure of the automatic cleaning device Figure 1 ; Figure 4 Schematic diagram of the overall structure of the automatic cleaning device Figure 2 ; Figure 5 This is a schematic diagram of the cleaning component. In the diagram: 1. Adaptor mounting unit; 101. Rotating movable frame; 102. Rotating support; 103. Transparent protective component; 2. Power drive unit; 201. Fixed base; 202. Reciprocating drive component; 203. Angle compensation connector; 3. Motion conversion unit; 301. Transmission swing arm; 302. Rotating shaft; 303. Support assembly; 4. Cleaning execution unit; 401. Elastic cleaning component; 402. Sludge collection structure. Detailed Implementation

[0020] 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.

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0022] Example 1

[0023] like Figure 1-5 As shown, a packaging machine with a self-cleaning function for the backing roller includes a main unit, a label paper gluing mechanism, and a main control system. The label paper gluing mechanism includes a gluing wheel, a glue storage tray, a glue scraper, and a backing roller. In the axial direction, the gluing wheel and the backing roller are aligned left and right, and in the circumferential direction, the gluing points correspond to the raised surfaces of the backing roller and maintain a preset distance. It also includes an external self-cleaning module that is linked to the main control system signals. The self-cleaning module includes: The adapter unit can be detachably mounted on the longitudinal channel of the packaging machine's backing roller, adapting to the existing equipment space layout and avoiding the equipment's inherent adjustment structure and maintenance operation area. The power drive unit, installed in the adapter mounting unit, is capable of outputting reciprocating linear motion power; The motion conversion unit connects the power drive unit and the cleaning execution unit, and can convert reciprocating linear motion into rotary motion; The cleaning execution unit can approach or move away from the liner roller under the drive of the motion conversion unit. It includes an elastic cleaning component, a sludge collection structure and a contact limiting structure. The elastic cleaning component can flexibly adhere and rub against the surface of the rotating liner roller. The sludge collection structure receives the sludge scraped off by the elastic cleaning component. The contact limiting structure limits the contact pressure and angle between the elastic cleaning component and the liner roller. When the main control system detects a signal indicating that the label paper has stopped being supplied or has been rejected, it identifies the corresponding station without label paper. When the station reaches the preset station before the coating roller, it triggers the power drive unit to move. The motion conversion unit drives the cleaning execution unit to move towards the backing roller, so that the elastic cleaning component contacts the backing roller and removes the surface glue residue. After the corresponding station leaves the coating area, the power drive unit is reset, and the cleaning execution unit separates from the backing roller, completing one self-cleaning cycle.

[0024] As a preferred embodiment, the adapter installation unit includes a rotatable frame, a rotating support, a transparent protective component, and a detachable fixing structure. The rotatable frame is hinged to the packaging machine body via the rotating support. The detachable fixing structure can lock or unlock the rotatable frame from the machine body. After unlocking, the rotatable frame can be rotated and laid down to expand the maintenance and operation space. The transparent protective component allows observation of the cleaning status and provides protection. The remaining structural components are made of high-strength rust-resistant material.

[0025] In a preferred embodiment, the power drive unit includes a fixed base, a reciprocating drive component, and an angle compensation connector. The reciprocating drive component is fixed to the fixed base and adapted to the air supply system of the packaging machine, enabling low-speed and smooth extension and retraction. The angle compensation connector connects the reciprocating drive component and the motion conversion unit, compensating for installation deviations and angle changes during the motion process, and ensuring the stability of power transmission.

[0026] In a preferred embodiment, the motion conversion unit includes a transmission swing arm, a rotating shaft, and a support assembly. The rotating shaft is rotatably mounted on the adapter mounting unit via the support assembly. One end of the transmission swing arm is fixed to the rotating shaft, and the other end is hinged to the angle compensation connector of the power drive unit. This can efficiently convert the linear motion of the reciprocating drive component into the rotational motion of the rotating shaft. The support assembly ensures that the rotating shaft rotates without jamming.

[0027] As a preferred embodiment, the elastic cleaning component of the cleaning execution unit is made of wear-resistant elastic material, and its cleaning end face is set parallel to the axis of the lining roller, which can completely fit the surface of the lining roller and avoid hard contact damage; the glue collection structure is an upward-facing trough, the length of which is adapted to the elastic cleaning component to ensure that the glue is completely collected; the contact limiting structure is a position-adjustable design, which can adjust the limiting distance according to the specifications of the lining roller and cleaning requirements.

[0028] As a preferred implementation, the main control system achieves precise timing control of the self-cleaning action through the workstation digital chain signal. When the label paper is stopped or rejected, the corresponding workstation signal group is triggered respectively. It also has a drive unit fault diagnosis function, which can detect the on / off status of the power control circuit in real time to ensure the reliable operation of the self-cleaning module.

[0029] In a preferred embodiment, the cleaning execution unit further includes a detachable fixing structure, through which the elastic cleaning component is connected to the sludge collection structure.

[0030] As a preferred implementation, the power drive unit, motion conversion unit and cleaning execution unit of the self-cleaning module form a linkage transmission chain, realizing the automated closed-loop operation of "signal recognition - power output - motion conversion - cleaning execution - reset standby" under the control of the main control system. Moreover, the cleaning action is only performed in the work area without label paper, without affecting the normal glue application operation.

[0031] The following detailed description of a packaging machine with a self-cleaning function of a lining roller according to the present invention, in conjunction with the accompanying drawings and specific embodiments, will be provided in further detail.

[0032] Working principle of the second glue cylinder for label paper: The second glue cylinder for label paper mainly consists of a glue-applying roller, a glue storage tray, and a scraper. Axially, the glue-applying roller and the scraper are aligned horizontally. Circumferentially, the glue application point corresponds to the raised surface of the scraper, with a distance of 0.2mm. The lower part of the glue-applying roller is immersed in the glue in the glue storage tray. As the glue-applying roller rotates, the glue absorbed onto the roller is evenly distributed to the glue application point under the action of the scraper, ensuring an appropriate amount of glue. When the glue application point of the glue-applying roller is vertically upward, the corresponding raised surface of the scraper presses the label paper against the glue-applying roller. The glue application of the label paper is completed by the pressure between the glue-applying roller and the scraper.

[0033] The second glue-applying cylinder of the label paper operates via a power unit located at the bottom of the main unit's No. 5 wheel, which drives the output shaft through a transmission box (see...). Figure 1The output shaft drives a set of helical gears on the connecting shaft via a coupling. The helical gears drive the clutch assembly, which in turn drives the glue cylinder's applicator wheel to rotate. This process is automatically controlled by the machine's main control system. When the main machine stops for a certain period of time, the cylinder actuates to disengage the clutch, thus stopping the glue cylinder's applicator wheel from rotating. After a certain delay, the applicator wheel's drive motor starts working, rotating the applicator wheel to prevent the glue in the glue cylinder and applicator wheel from drying out. When the main machine restarts, the small box label paper glue cylinder clutch resets and runs synchronously with the machine, continuously and evenly applying glue to the applicator wheel. Furthermore, the machine's shutdown control is not a simple on / off cycle, but rather a step-by-step process. The internal gear swing arm at one end of the eccentric gear sleeve rotates a certain angle under the action of the cylinder, causing the backing roller to lift. The negative pressure suction holes on the backing roller suck up the label paper, thus detaching it from the applicator wheel. Therefore, even when the machine stops, the label paper will not stick to the applicator wheel (see...). Figure 2 The second glue cylinder for the label paper mainly consists of a glue-applying roller, a glue storage tray, and a scraper. Axially, the glue-applying roller and the counter-roller are aligned horizontally; circumferentially, the glue application points correspond to the raised surfaces of the counter-roller, with a distance of 0.2mm between them. The lower part of the glue-applying roller is immersed in the glue in the glue storage tray. As the glue-applying roller rotates, the glue absorbed onto it is evenly distributed to the glue application points under the action of the scraper, ensuring an appropriate amount of glue. When the glue application point on the glue-applying roller is vertically upward, the corresponding raised surface of the counter-roller presses the label paper against the glue-applying roller. The glue application of the label paper is completed by the pressure between the glue-applying roller and the counter-roller.

[0034] The second glue-applying cylinder of the label paper operates via a power unit located at the bottom of the main unit's No. 5 wheel, which drives the output shaft through a transmission box (see...). Figure 1 The output shaft drives a set of helical gears on the connecting shaft via a coupling. The helical gears drive the clutch assembly, which in turn drives the glue cylinder's applicator wheel to rotate. This process is automatically controlled by the machine's main control system. When the main machine stops for a certain period of time, the cylinder actuates to disengage the clutch, thus stopping the glue cylinder's applicator wheel from rotating. After a certain delay, the applicator wheel's drive motor starts working, rotating the applicator wheel to prevent the glue in the glue cylinder and applicator wheel from drying out. When the main machine restarts, the small box label paper glue cylinder clutch resets and runs synchronously with the machine, continuously and evenly applying glue to the applicator wheel. Furthermore, the machine's shutdown control is not a simple on / off cycle, but rather a step-by-step process. The internal gear swing arm at one end of the eccentric gear sleeve rotates a certain angle under the action of the cylinder, causing the backing roller to lift. The negative pressure suction holes on the backing roller suck up the label paper, thus detaching it from the applicator wheel. Therefore, even when the machine stops, the label paper will not stick to the applicator wheel (see...). Figure 2 ).

[0035] I. Overall structural assembly The core of this invention, a packaging machine with a self-cleaning function for the lining roller, is an external self-cleaning module added to the existing main unit, label paper gluing mechanism, and main control system of the YB45A packaging machine. The entire self-cleaning module is linked to the main control system of the packaging machine, requiring no changes to the main structure of the packaging machine and adapting to the existing equipment layout. Through the coordinated operation of the installation adapter mechanism, power drive mechanism, motion conversion mechanism, and cleaning execution mechanism, it achieves automated and precise removal of adhesive residue from the lining roller without interfering with normal gluing operations.

[0036] II. Specific Structure and Assembly of Each Unit (a) Adaptor Installation Unit 1 The adapter mounting unit 1 is used to enable the detachable assembly of the self-cleaning module and the packaging machine. It includes a rotatable movable frame 101, a rotating support 102, a transparent protective component 103, and a detachable fixing structure. During assembly, first remove the original plexiglass plate above the longitudinal channel of the YB45A packaging machine's backing roller. Then, fix the rotating support to the corresponding position on the packaging machine body with bolts. The rotatable movable frame is hinged to the rotating support via a connecting shaft, ensuring that the movable frame can rotate flexibly around the rotating support.

[0037] The rotatable frame is made of 45# steel with a chrome-plated surface. After tempering, it possesses excellent machinability and comprehensive mechanical properties. After quenching, its surface hardness reaches 45-52 HRC, and the chrome plating effectively enhances rust resistance. The transparent protective component uses 6mm thick acrylic glass, fitted to the corresponding area of ​​the frame. This prevents glue residue from splashing during cleaning and allows operators to easily observe the cleaning status in real time. The detachable fixing structure consists of a fixing block and a handle screw 104. In standby mode, the handle screw is screwed into the fixing block to lock the frame to the machine body. When adjustments or maintenance are needed for the height of the conveyor rubber rollers or the parallelism of the backing rollers and the coating wheel, the handle screw is unscrewed to unlock the frame, allowing it to be rotated backward and laid down, providing ample operating space. The frame's structural design precisely avoids the adjustment holes for the conveyor rubber rollers and the parallelism adjustment nuts for the backing rollers, ensuring uninterrupted maintenance of the equipment.

[0038] (ii) Power drive unit 2 The power drive unit 2 is mounted on the upper part of the rotatable movable frame that is compatible with the mounting unit. It includes a fixed base 201, a reciprocating drive component 202, and an angle compensation connector 203. The fixed base is firmly connected to the movable frame by welding to ensure stable power output. The reciprocating drive component uses a double-acting pneumatic drive cylinder, which is compatible with the packaging machine's 0.5Mpa air source system. The cylinder is equipped with a throttle valve as a speed regulation structure, which can set the extension speed to 60mm / s to achieve low-speed and smooth extension and retraction, avoiding impact on the backing roller and cleaning components. The angle compensation connector uses a spherical bearing. One end of the bearing is fixed to the cylinder output shaft, and the other end is hinged to the motion conversion unit. This effectively compensates for installation deviations and angle changes during the movement, ensuring the accuracy and stability of power transmission.

[0039] (III) Motion Conversion Unit 3 The motion conversion unit 3 includes a transmission rocker arm 301, a rotating shaft 302, and a support assembly 303. It converts the reciprocating linear motion of the power drive unit into rotational motion, thereby driving the cleaning execution unit. The support assembly is a combination of a bearing housing and a bearing (model 6000). The bearing housing is fixedly installed on a rotatable frame, and the rotating shaft is rotatably mounted within the bearing housing via the bearing. The rotating shaft is made of 45# steel with a diameter of 10mm to meet the load transmission requirements under low-frequency, low-speed, and low-load conditions, ensuring smooth rotation without jamming. One end of the transmission rocker arm is welded to the rotating shaft, with the weld seam encircling the outer cylindrical surface of the rotating shaft. The bevel is filled and ground smooth to ensure connection strength. The other end of the transmission rocker arm is hinged to the spherical bearing of the power drive unit. When the cylinder extends or retracts, the transmission rocker arm drives the rotating shaft to rotate synchronously, achieving efficient conversion of the power transmission direction.

[0040] (iv) Cleaning Execution Unit 4 The cleaning execution unit 4 is fixedly connected to the end of the transmission swing arm of the motion conversion unit away from the joint bearing. It is the core component for removing glue residue and includes an elastic cleaning element 401, a glue residue collection structure 402, a contact limiting structure, and a detachable fixing structure. The connecting bracket is detachably fixed to the transmission swing arm with screws, and the other end is rigidly connected to the glue residue collection structure (i.e., the storage box). The glue residue collection structure is made of 45# steel and has an upward-opening collection groove on one side. The length of the collection groove is adapted to the length of the elastic cleaning element to ensure that it can completely catch the scraped glue residue. The elastic cleaning element is a scraper made of polyurethane material, which has oil resistance, wear resistance, low temperature resistance, aging resistance, and good elasticity. Its cleaning end face is set parallel to the axis of the backing roller and can fully flexibly fit the surface of the backing roller.

[0041] The detachable fixing structure is a combination of scraper strip 404 and screws. The scraper strip is connected to the sludge collection structure by at least two evenly distributed screws, clamping and fixing the elastic cleaning component in the collection groove. The cleaning end extends out of the groove to facilitate contact and friction with the backing roller. The detachable design also allows for quick replacement of the elastic cleaning component after wear. The contact limiting structure 403 is a limiting block fixed to the lower part of the connecting bracket. Its installation position is adjustable. By adjusting the height of the limiting block, the contact pressure and angle between the elastic cleaning component and the backing roller are controlled to avoid excessive contact and damage to both. The limiting distance corresponding to the contact gap is typically controlled to be 0.1-0.3mm.

[0042] In addition, for the aforementioned cleaning implementation agencies, the following solutions can be further preferred. (1) Multi-dimensional flexible cleaning components: precise descaling and protection in one ① Layered scraper assembly design: A three-layer scraper structure consisting of a main scraper, a secondary scraper, and an edge trimming scraper is adopted, all made of polyurethane elastomer (Shore hardness 85A) through molding. The main scraper is arc-shaped (curvature adapted to the backing roller), with a V-shaped guide groove (3mm wide, 2mm deep) on the cleaning end face for quick removal of adhesive residue; the secondary scraper is 5mm apart from the main scraper and set at a 15° angle for secondary scraping of residual adhesive residue; the edge trimming scraper is a thin sheet type, fitting snugly against the edge of the backing roller to remove accumulated adhesive at the edge. The three layers work together to achieve a descaling rate of over 99%.

[0043] ② Adaptive pressure adjustment mechanism: A miniature disc spring (elastic coefficient 5N / mm) is added between the scraper bar and the collection box, which, together with a pressure sensor, provides real-time feedback on the contact pressure (adjustable from 0.2-0.5N). When the glue residue thickness increases and causes the pressure to exceed the limit, the spring automatically compresses to buffer; when the glue residue decreases, the spring rebounds to compensate, ensuring that the scraper always flexibly contacts the backing roller, avoiding damage from hard contact, and adapting to different glue residue adhesion states under different working conditions.

[0044] ③ Scraper Wear Compensation Structure: The scraper pressure bar adopts a threaded lifting design. By adjusting the fine-tuning screws at both ends of the pressure bar (accuracy 0.01mm), the scraper wear can be compensated (maximum compensation 5mm). Cleaning effect can be restored without replacing the scraper, extending the scraper service life by more than 30% and reducing maintenance costs.

[0045] (2) High-efficiency pollution prevention and collection system: closed-loop scale treatment ① Negative pressure assisted collection structure: A miniature negative pressure nozzle (negative pressure value -0.02 to -0.03 MPa) is added to the top of the glue residue collection box, which is linked with the original negative pressure system of the packaging machine. During cleaning, the nozzle generates a directional airflow to quickly suck the glue residue scraped off by the scraper into the collection tank, avoiding glue residue splashing; the inner wall of the collection tank is coated with polytetrafluoroethylene (surface roughness Ra0.2μm) to prevent glue residue adhesion, and the collection efficiency is improved to 99.5%.

[0046] ②Graded filtration and anti-overflow design: The collection box is equipped with a double-layer filtration structure. The upper layer is a metal filter (1mm pore size) to intercept large pieces of glue scale, and the lower layer is a sponge filter layer to adsorb fine glue particles. A liquid level sensor and an electric scale discharge valve are installed at the bottom. When the glue scale accumulates to 80% of the collection box volume, the sensor triggers an alarm, and the scale discharge valve automatically opens to discharge the glue scale into an external sealed container, achieving contactless scale discharge and completely eliminating secondary pollution.

[0047] ③ Quick-release collection box: The collection box is fixed to the connecting bracket by quick-release buckles and can be disassembled as a whole without tools; the box body is made of transparent PC material and has built-in LED indicator lights, which makes it easy to observe the status of glue buildup in real time, reducing maintenance time by 50%.

[0048] (3) Intelligent limit and guide mechanism: precise control and stable operation ① Three-dimensional adjustable limiting component: The limiting block adopts an "X / Y / Z" three-dimensional adjustment structure, with an X-axis (axial) adjustment range of ±5mm, a Y-axis (radial) adjustment range of 0.1-0.5mm, and a Z-axis (height) adjustment range of 0-3mm. Precise positioning via a scale knob ensures that the parallelism error between the scraper and the lining roller is ≤0.05mm, and the contact position deviation is ≤±0.3mm, adapting to different specifications of lining rollers (regular cigarette / slim cigarette models).

[0049] ② Swinging guide and buffer structure: A guide rail and a damper are added between the transmission swing rod and the connecting bracket. The guide rail ensures that the swing trajectory deviation of the cleaning component is ≤0.1mm, and the damper can adjust the swing speed (0.1-0.3rad / s) to avoid the impact when the cleaning action starts and resets, and reduce the impact of equipment vibration on the coating accuracy.

[0050] ③ Dual mechanical and electronic limit protection: In addition to the original mechanical limit block, a proximity switch is added as an electronic limit. When the cleaning component exceeds the preset stroke (±0.5mm), the proximity switch triggers a signal, and the main control system immediately cuts off the power output and drives the cleaning component to reset in an emergency. This dual protection avoids equipment collision damage.

[0051] III. Control System and Working Process (a) Control system linkage The self-cleaning action of this invention is controlled by the original main control system of the packaging machine (GD packaging machine MICROII control system), and signal linkage is achieved by rewriting the program. The main control system defines the solenoid valve signal output point and the digital chain of the action station. When the label paper is stopped, the positions of stations 103, 104, and 105 of the digital chain are turned on; when the label paper is rejected, the positions of stations 113, 114, and 115 are turned on. At the same time, a diagnostic function is added to detect whether the solenoid valve coil is open-circuited in real time, ensuring the reliable operation of the control circuit. The main control system drives the solenoid valve through the output signal at point 32 of board N16, thereby controlling the cylinder action of the power drive unit.

[0052] (II) Work Process (1) Standby state: The cleaning execution unit of the self-cleaning module is in the reset state, the elastic cleaning part is separated from the backing roller, the rotatable movable frame is locked by the handle screw, and the transparent protective part is in the closed state, which does not affect the normal glue application operation of the packaging machine. (2) Signal triggering: When the main control system of the packaging machine detects a signal that the label paper has stopped being supplied or has been rejected, it automatically identifies the corresponding station without label paper and tracks the position of the station by signal shifting; (3) Cleaning start: When the station without label paper moves to the preset station before the glue coating wheel, the main control system outputs a control signal to trigger the cylinder of the power drive unit to extend, drive the transmission swing arm to swing through the joint bearing, and then drive the rotating shaft to rotate, so that the cleaning execution unit moves towards the anti-roller. The elastic cleaning part flexibly contacts and rubs against the surface of the rotating anti-roller to scrape off the glue residue on the surface. (4) Glue scale collection: The scraped glue scale falls into the collection tank of the glue scale collection structure under the action of gravity, avoiding glue scale splashing and causing secondary pollution to the equipment; (5) Reset standby: When the corresponding workstation without trademark paper leaves the glue application area, the main control system controls the cylinder to retract, driving the motion conversion unit and cleaning execution unit to reset, the elastic cleaning part separates from the backing roller, completes one self-cleaning cycle, and waits for the next signal trigger.

[0053] IV. Maintenance and Care (1) Daily maintenance: Regularly observe the cleanliness of the transparent protective parts and the accumulation of glue in the glue collection structure. When there is a lot of glue in the collection tank, the handle screw can be unscrewed to unlock the movable frame, rotate and lay it down to clean the glue. It can be operated without stopping the machine. (2) Replacement of elastic cleaning parts: Check the wear condition of the elastic cleaning parts by touch or visual inspection. If the wear is severe or damaged, first control the cylinder to reset so that the cleaning execution unit is in a horizontal position, open the transparent protective part, loosen the fixing screws of the scraper pressure strip, and then disassemble and replace the new elastic cleaning parts. After replacement, ensure that the cleaning end face is parallel to the axis of the backing roller. (3) Regular inspection: Regularly check the tightness of each connection part, including the rotating support, fixed seat, screws, etc. If any looseness is found, tighten it in time; check the movement of the cylinder, joint bearing and rotating shaft to ensure that there is no jamming, air leakage or other issues, and ensure the stable operation of the device.

[0054] Application effect

[0055] The number of main machine shutdowns, the number of shutdowns due to label paper conveyor blockages, and the number of cigarette packs with whitened corners were statistically analyzed before and after the installation of the automatic cleaning device for the label paper backing rollers. To verify the impact of installing this device on the packaging unit, the unit's operating efficiency was statistically analyzed for 11 months before and after the improvement, and the daily average value was taken. (See Tables 1 and 2) Table 1 Comparison of Host Downtime Numbers

[0056] Table 2 Comparison of Quality Defects in the Label Paper of the Main Unit Box and the Amount of Cigarette Packets

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A packaging machine with a self-cleaning function for the backing roller, comprising a main unit, a label paper gluing mechanism, and a main control system, characterized in that, The trademark paper gluing mechanism includes a gluing wheel, a glue storage tray, a glue scraper, and a backing roller. In the axial direction, the gluing wheel and the backing roller are aligned horizontally, and in the circumferential direction, the gluing points correspond to the raised surfaces of the backing roller and maintain a preset distance. It also includes an external self-cleaning module that is linked to the main control system signal, the self-cleaning module comprising: The adapter unit can be detachably mounted on the longitudinal channel of the packaging machine's backing roller, adapting to the existing equipment space layout and avoiding the equipment's inherent adjustment structure and maintenance operation area. The power drive unit, installed in the adapter mounting unit, is capable of outputting reciprocating linear motion power; The motion conversion unit connects the power drive unit and the cleaning execution unit, and can convert reciprocating linear motion into rotary motion; The cleaning execution unit, driven by the motion conversion unit, can approach or move away from the lining roller. It includes an elastic cleaning element, a sludge collection structure, and a contact limiting structure. The elastic cleaning element can flexibly adhere and rub against the surface of the rotating lining roller. The sludge collection structure receives the sludge scraped off by the elastic cleaning element. The contact limiting structure limits the contact pressure and angle between the elastic cleaning element and the lining roller. When the main control system detects a signal indicating that the label paper has stopped being supplied or has been rejected, it identifies the corresponding station without label paper. When the station reaches the preset station before the coating roller, it triggers the power drive unit to move. The motion conversion unit drives the cleaning execution unit to move towards the backing roller, so that the elastic cleaning component contacts the backing roller and removes the surface glue residue. After the corresponding station leaves the coating area, the power drive unit is controlled to reset, and the cleaning execution unit separates from the backing roller, completing one self-cleaning cycle.

2. A packaging machine with a self-cleaning function for the backing roller according to claim 1, characterized in that, The adapter installation unit includes a rotatable frame, a rotating support, a transparent protective component, and a detachable fixing structure. The rotatable frame is hinged to the packaging machine body via the rotating support. The detachable fixing structure can lock or unlock the rotatable frame from the machine body. After unlocking, the rotatable frame can be rotated and laid down to expand the maintenance and operation space. The transparent protective component allows observation of the cleaning status and provides protection. The remaining structural components are made of high-strength rust-resistant material.

3. A packaging machine with a self-cleaning function for the backing roller according to claim 1, characterized in that, The power drive unit includes a fixed base, a reciprocating drive component, and an angle compensation connector. The reciprocating drive component is fixed to the fixed base and adapted to the air supply system of the packaging machine, enabling low-speed and smooth extension and retraction. The angle compensation connector connects the reciprocating drive component and the motion conversion unit, compensating for installation deviations and angle changes during the motion process, and ensuring the stability of power transmission.

4. A packaging machine with a self-cleaning function for the backing roller according to claim 1, characterized in that, The motion conversion unit includes a transmission swing arm, a rotating shaft, and a support assembly. The rotating shaft is rotatably mounted on the adapter mounting unit via the support assembly. One end of the transmission swing arm is fixed to the rotating shaft, and the other end is hinged to the angle compensation connector of the power drive unit. This allows for the efficient conversion of the linear motion of the reciprocating drive component into the rotational motion of the rotating shaft. The support assembly ensures that the rotating shaft rotates without jamming.

5. A packaging machine with a self-cleaning function for the backing roller according to claim 1, characterized in that, The elastic cleaning component of the cleaning execution unit is made of wear-resistant elastic material, and its cleaning end face is set parallel to the axis of the lining roller, which can completely fit the surface of the lining roller and avoid hard contact damage; the glue collection structure is an upward-facing trough, the length of which is adapted to the elastic cleaning component to ensure that the glue is completely collected; the contact limiting structure is a position-adjustable design, which can adjust the limiting distance according to the specifications of the lining roller and cleaning requirements.

6. A packaging machine with a self-cleaning function for the backing roller according to claim 1, characterized in that, The main control system achieves precise timing control of the self-cleaning action through the digital chain signal of the workstation. When the label paper is stopped or rejected, the corresponding workstation signal group is triggered respectively. It also has a drive unit fault diagnosis function, which can detect the on / off status of the power control circuit in real time to ensure the reliable operation of the self-cleaning module.

7. A packaging machine with a self-cleaning function for the backing roller according to claim 1, characterized in that, The cleaning execution unit also includes a detachable fixing structure, and the elastic cleaning component is connected to the sludge collection structure through the detachable fixing structure.

8. A packaging machine with a self-cleaning function for the backing roller according to claim 1, characterized in that, The power drive unit, motion conversion unit, and cleaning execution unit of the self-cleaning module form a linkage transmission chain, realizing automated closed-loop operation of "signal recognition - power output - motion conversion - cleaning execution - reset standby" under the control of the main control system. Moreover, the cleaning action is only performed in the work area without label paper, without affecting the normal glue application operation.

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