An adhesive-free digital printing device and a cleaning mechanism thereof

Abstract

The application discloses a kind of not dry adhesive digital printing equipment and its cleaning mechanism, belong to not dry adhesive digital printing equipment raw material cleaning field.The device includes fixedly arranged collecting roller and dust roller on support component, the viscosity of the surface of the collecting roller is greater than the viscosity of the surface of the dust roller, the surface of the collecting roller is in contact with the dust roller, the dust roller is used to collect the dust on the surface of material, the collecting roller is used to take dust on the surface of dust roller, the inside of the support component is provided with winding roller and unwinding roller, the side of the unwinding roller is wound with sticky tape;The support component is also provided with cleaning switching mechanism, and the output end of the cleaning switching mechanism is cooperatively provided with first compression roller and second compression roller.The cleaning switching mechanism is provided in the application, the output end cooperates first compression roller and second compression roller, drives sticky tape to extrude and adhere to the surface of collecting roller for cleaning.The mechanism can be automatically cleaned without manual tearing of sticky tape, improve production efficiency and cleaning timeliness.

Description

Technical Field

[0001] This invention relates to the field of cleaning technology for raw materials in self-adhesive digital printing equipment, specifically to a self-adhesive digital printing equipment and its cleaning mechanism. Background Technology

[0002] Digital printing equipment for self-adhesive labels is a device that prints directly onto self-adhesive materials via computer without the need for traditional plate making. It employs thermal transfer or thermal technology and supports small-batch, personalized, and variable data printing. With a resolution of up to 600 dpi, it is suitable for labels, trademarks, anti-counterfeiting labels, etc., and is widely used in retail, logistics, and pharmaceutical industries.

[0003] In precision pre-press processing scenarios such as self-adhesive digital printing, satellite rotary printing presses, slitting machines, laminating machines, and coating machines, a "dual-roller synergy" system is typically used: a low-viscosity dust-collecting roller first contacts the paper to adsorb micro-dust, and then a high-viscosity collecting roller "snatches" the dust from the dust-collecting roller, achieving a step-by-step transfer. When the collecting roller accumulates a lot of dust, the surface adhesive tape can be directly peeled off to expose the fresh adhesive surface underneath, quickly restoring cleaning ability without the need for machine shutdown and washing, making the operation convenient and efficient. Combined with an electrostatic eliminator, it can effectively prevent secondary dust adhesion.

[0004] However, the aforementioned methods for cleaning raw materials in self-adhesive digital printing equipment still have the following drawbacks: Replacing the adhesive tape on the collection roller requires manual operation. Workers must stop the machine, turn on the printing press, locate each adhesive tape end, and manually tear it off – a cumbersome and time-consuming process. Furthermore, there is a lack of effective methods for monitoring dust accumulation, making it impossible to accurately determine whether the adhesive tape has reached saturation. If replacement is not timely, excessive dust accumulation on the adhesive tape will significantly weaken the dust-collecting roller's dust-removing ability, leading to a decline in dust removal function, and the residual dust directly affects the quality of the printed products. Summary of the Invention

[0005] The purpose of this invention is to provide a self-adhesive digital printing equipment and its cleaning mechanism to solve the problem of the cumbersome process in the prior art, which requires workers to stop the printing machine, open it, find the adhesive tape ends one by one, and manually tear them off.

[0006] The technical problem to be solved by this invention can be achieved through the following technical solution: A cleaning mechanism includes a collecting roller and a dust removal roller fixedly mounted on a support member. The surface of the collecting roller has a higher adhesiveness than that of the dust removal roller. The surface of the collecting roller is in contact with the dust removal roller. The dust removal roller is used to collect dust from the surface of the material, and the collecting roller is used to remove dust from the surface of the dust removal roller. A take-up roller and an unwind roller are provided inside the support member. An adhesive tape is wound around the side of the unwind roller. The take-up roller, through active rotation, winds the adhesive tape from the side of the unwind roller onto the side of the take-up roller. A cleaning switching mechanism is also provided on the support member. A first pressure roller and a second pressure roller are provided at the output end of the cleaning switching mechanism. The cleaning switching mechanism can drive the first pressure roller and the second pressure roller to move, thereby causing the adhesive tape to cooperate with the collecting roller to clean the dust on the surface of the collecting roller.

[0007] Preferably, the cleaning switching mechanism includes a linear drive module fixedly mounted on a support component, a drive slider is provided on the linear drive module, and multiple sets of support plates are fixedly mounted on the drive slider; the first pressure roller and the second pressure roller are respectively rotatably connected to the corresponding support plates to realize the transmission of the first pressure roller and the second pressure roller.

[0008] Preferably, the first pressure roller, the second pressure roller, the collecting roller, and the dust removal roller are all provided in two sets, symmetrically arranged along the material surface. The driving slider drives the module back and forth between the two working surfaces along a straight line, driving the first pressure roller and the second pressure roller on both sides to move, thereby pressing the adhesive tape.

[0009] Preferably, a telescopic cylinder is fixedly installed on the support component, and a connecting plate is fixedly installed on the extended end of the telescopic cylinder. A nested elastic pressure plate is fixedly installed on one end of the connecting plate, and the second pressure roller is rotatably connected to the end of the nested elastic pressure plate. A linkage push block is fixedly connected to the other end. An elastic mounting mechanism for positioning the collecting roller is provided on the support component. The elastic mounting mechanism will contract when squeezed by the linkage push block, causing the collecting roller to detach from the surface of the dust removal roller.

[0010] Preferably, the first pressure roller is rotatably connected to the end of the connecting plate near the linkage push block.

[0011] Preferably, the elastic mounting mechanism includes a positioning rod fixedly mounted on a support component, a mounting seat slidably fitted at the end of the positioning rod, a spring fitted between the mounting seat and the positioning rod, and a linkage block provided on the front side of the mounting seat.

[0012] Preferably, the front side of the linkage block is provided with a slope that slides with the linkage push block, and the lower end of the linkage push block is provided with a roller.

[0013] Preferably, the support component is provided with a slide rail, and a gravity pressing slider is slidably fitted inside the slide rail. The first pressure roller is rotatably disposed at the bottom of the gravity pressing slider, and the winding speed of the take-up roller is less than the rotation speed of the dust removal roller.

[0014] Preferably, the dust removal roller is a low-viscosity silicone rubber dust removal roller, the collecting roller is a medium / high-viscosity silicone rubber or PU collecting roller, and the adhesive tape is a dust-adhesive paper roll.

[0015] A digital printing device for self-adhesive labels includes a cleaning mechanism.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: This invention provides a cleaning mechanism, including a collecting roller and a dust-removing roller fixed to a support component. The surface adhesiveness of the collecting roller is greater than that of the dust-removing roller, and the two surfaces are in contact. The dust-removing roller adsorbs dust from the material surface, while the collecting roller removes dust from the dust-removing roller. A take-up roller and an unwind roller are provided inside the support component. The unwind roller winds an adhesive tape, and the take-up roller actively rotates to gradually wind up the adhesive tape. A cleaning switching mechanism is provided on the support component, the output end of which cooperates with a first pressure roller and a second pressure roller to drive the adhesive tape to press against the surface of the collecting roller for cleaning. This mechanism can automatically clean without manually removing the adhesive tape, improving production efficiency and cleaning timeliness. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the standby structure of the first embodiment of the present invention; Figure 2 This is a schematic diagram of the structure during dust removal in the first embodiment of the present invention; Figure 3 This is a schematic diagram of the first and second pressure rollers of the present invention in standby mode; Figure 4 This is a schematic diagram of the structure of the first and second pressure rollers during cleaning according to the present invention; Figure 5 This is a schematic diagram of another set of first and second pressure rollers during cleaning in the second optional scheme of the first embodiment of the present invention; Figure 6 This is a schematic diagram of the standby structure of the second embodiment of the present invention; Figure 7 This is a schematic diagram of the structure during cleaning according to the second embodiment of the present invention; Figure 8 This is a schematic diagram of the standby structure of the third embodiment of the present invention; Figure 9 This is a schematic diagram of the structure during cleaning according to the third embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Supporting component; 2. Collecting roller; 3. Dust removal roller; 4. Rewinding roller; 5. Unwinding roller; 6. Adhesive tape; 7. Cleaning switching mechanism; 701. Linear drive module; 702. Drive slider; 703. Support plate; 704. Telescopic cylinder; 705. Connecting plate; 706. Nested elastic pressure plate; 707. Linkage push block; 708. Slide rail; 709. Gravity pressing slider; 8. First pressure roller; 9. Second pressure roller; 10. Elastic mounting mechanism; 1001. Positioning rod; 1002. Mounting base; 1003. Spring; 1004. Linkage block. Detailed Implementation

[0019] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0020] Example 1 Self-adhesive digital printing equipment requires no plate making, printing directly from a computer. It supports small-batch personalized printing with a resolution of up to 600 dpi and is widely used in labels, trademarks, and other fields. In the pre-press process, dust can severely affect print quality, making dust removal an indispensable and crucial step. A common pre-press dust removal solution is a "dual-roller synergy": a low-viscosity dust-collecting roller 3 rotates with the material movement, adsorbing dust from the material surface; a high-viscosity collecting roller 2 contacts the surface of the dust-collecting roller 3, using its strong adhesion to remove dust from the dust-collecting roller 3, causing dust to accumulate on the surface of the collecting roller 2. When the accumulation is significant, the adhesive strip 6 on the surface of the collecting roller 2 can be peeled off, restoring it to a clean state. However, this solution still has obvious drawbacks: on the one hand, each time the adhesive tape 6 is replaced, it is necessary to manually stop and start the machine to find the tape head and manually tear it off, which is a cumbersome operation process and seriously affects production efficiency; on the other hand, the solution lacks a real-time monitoring method for the amount of dust accumulation, and operators cannot accurately judge when to replace the adhesive tape 6. If it is not replaced in time, the increased dust residue on the surface of the collecting roller 2 will greatly weaken its dust removal ability, which will lead to quality problems such as dirt spots and color differences on the surface of the printed products.

[0021] The present invention provides a cleaning mechanism, including a collecting roller 2 and a dust removal roller 3 fixedly mounted on a support member 1. The surface of the collecting roller 2 has a greater viscosity than the surface of the dust removal roller 3. The surface of the collecting roller 2 is in contact with the dust removal roller 3. The dust removal roller 3 is used to collect dust from the surface of the material, and the collecting roller 2 is used to remove dust from the surface of the dust removal roller 3.

[0022] The support component 1 can be a support component used in precision pre-press processing scenarios such as self-adhesive digital printing presses, satellite rotary printing presses, slitting machines, laminating machines, and coating machines. As a preferred embodiment, the dust removal roller 3 is a low-viscosity silicone rubber dust removal roller 3, which can effectively adsorb dust without damaging the material surface; the collection roller 2 is a medium / high-viscosity silicone rubber or PU collection roller 2, which, with its high surface adhesion, ensures stable dust removal from the dust removal roller 3; the adhesive tape 6 is a dust-adhesive paper roll, which can be replaced entirely after use to restore the cleanliness of the collection roller 2.

[0023] The support component 1 has a take-up roller 4 and an unwind roller 5 on its inner side. An adhesive tape 6 is wound around the side of the unwind roller 5. The take-up roller 4 rotates actively, gradually winding the adhesive tape 6 from the side of the unwind roller 5 to the side of the take-up roller 4, thus achieving automatic winding and supply of the adhesive tape 6. The support component 1 also has a cleaning switching mechanism 7. The output end of the cleaning switching mechanism 7 is equipped with a first pressure roller 8 and a second pressure roller 9. The cleaning switching mechanism 7 can drive the first pressure roller 8 and the second pressure roller 9 to move, thereby causing the adhesive tape 6 to contact the collecting roller 2 and clean the dust from the surface of the collecting roller 2.

[0024] When using this embodiment, as follows: Figure 3 As shown, when the cleaning mechanism is in standby mode, the first pressure roller 8 and the second pressure roller 9 are positioned away from the collecting roller 2 and do not come into contact with it. The dust removal roller 3 rotates synchronously with the material conveying motion, capturing and adsorbing dust from the material surface onto its own surface; the collecting roller 2 rotates along with the dust removal roller 3 while in contact with it, continuously capturing dust from the surface of the dust removal roller 3 through its strong surface adhesion, and the dust accumulates continuously on the surface of the collecting roller 2.

[0025] When the collecting roller 2 needs to be cleaned, the cleaning switching mechanism 7 is activated. The first pressure roller 8 and the second pressure roller 9 move closer to the collecting roller 2 and squeeze the adhesive tape 6, so that the adhesive tape 6 adheres to the surface of the collecting roller 2 and forms a certain wrap angle. The adhesive tape 6 uses its own adhesive properties to clean the dust on the surface of the collecting roller 2 (i.e. the area in contact with the collecting roller 2), thereby restoring the collecting roller 2 to a clean working state. The cleaning operation can be completed without manual removal.

[0026] As an optional solution in this embodiment, such as Figure 1 , Figure 2As shown, the cleaning switching mechanism 7 includes a linear drive module 701 fixedly mounted on the support component 1. A drive slider 702 is fitted onto the linear drive module 701, and multiple sets of support plates 703 are fixedly mounted on the drive slider 702. The first pressure roller 8 and the second pressure roller 9 are rotatably connected to their respective support plates 703, achieving transmission between the first pressure roller 8 and the second pressure roller 9. By driving the slider 702 to move linearly along the linear drive module 701, the first pressure roller 8 and the second pressure roller 9 can be switched between the working position and the standby position, achieving the aforementioned automatic cleaning effect without manual intervention.

[0027] As another optional solution in this embodiment, such as Figure 1 , Figure 2 As shown, the first pressure roller 8, the second pressure roller 9, the collecting roller 2, and the dust removal roller 3 are all provided in two sets, symmetrically arranged along the material surface. The drive slider 702 drives the module 701 back and forth along a straight line between the two working surfaces, driving the first pressure roller 8 and the second pressure roller 9 on both sides to move alternately, thereby pressing and cleaning the sticky tape 6 corresponding to the upper and lower sets of collecting rollers 2. This solution is mainly for usage environments that require double-sided dust removal printing. The drive slider 702 has three position states: the first is the standby state, such as... Figure 1 As shown, both pressure rollers are far from the collecting roller 2; the second and third types respectively clean the upper collecting roller 2 and the lower collecting roller 2, meeting the automated cleaning requirements in double-sided printing scenarios, such as... Figure 2 As shown.

[0028] It should be emphasized that the core improvement of this embodiment lies in addressing the shortcomings of traditional dual-roller dust collectors, which require manual removal of the adhesive tape 6, are cumbersome, and lack dust accumulation monitoring. An automatic cleaning mechanism is proposed. By setting a take-up roller 4, an unwind roller 5, and a cleaning switching mechanism 7 on the support component 1, the cleaning switching mechanism 7 drives the first and second pressure rollers 9 to move, pressing the adhesive tape 6 against the surface of the collecting roller 2 and forming a wrapping corner on the take-up roller 4. The adhesive properties of the adhesive tape 6 automatically remove dust from the collecting roller 2 without requiring manual operation, thus improving cleaning efficiency. An optional double-set symmetrical roller structure can also be configured, driving the slider 702 to reciprocate to achieve automatic cleaning in double-sided dust collection scenarios, improving production efficiency and cleaning timeliness.

[0029] Example 2 In Embodiment 1, the collecting roller 2 is simultaneously subjected to two driving forces: on the one hand, the dust removal roller 3 rotates, driving the collecting roller 2 to rotate through surface contact; on the other hand, when the adhesive tape 6 forms a wrap angle with the collecting roller 2, it also exerts a traction or resistance effect on the rotation of the collecting roller 2. Meanwhile, the winding roller 4 continuously increases its winding radius during the winding process. If a constant rotation speed is maintained, the winding linear speed will change accordingly, resulting in a mismatch in the surface linear speeds between the collecting roller 2 and the dust removal roller 3. This causes relative sliding friction between the two, which can easily lead to roller surface wear after prolonged use, affecting the dust removal effect and service life.

[0030] To solve the above problems, a telescopic cylinder 704 is fixedly installed on the support component 1. A connecting plate 705 is fixedly installed at the extended end of the telescopic cylinder 704. A nested elastic pressure plate 706 is fixedly installed at one end of the connecting plate 705. The nested elastic pressure plate 706 can shrink and deform under pressure to absorb stroke errors. The second pressure roller 9 is rotatably connected to the end of the nested elastic pressure plate 706. A linkage push block 707 is fixedly connected to the other end of the connecting plate 705. An elastic mounting mechanism 10 for positioning the collecting roller 2 is provided on the support component 1. The elastic mounting mechanism 10 will shrink under the pressure of the linkage push block 707, causing the collecting roller 2 to disengage from the contact surface with the dust removal roller 3. The first pressure roller 8 is rotatably connected to the end of the connecting plate 705 near the linkage push block 707.

[0031] The elastic mounting mechanism 10 includes a positioning rod 1001 fixedly mounted on the support member 1. A mounting seat 1002 is slidably fitted at the end of the positioning rod 1001. A spring 1003 is fitted between the mounting seat 1002 and the positioning rod 1001. The spring 1003 provides a reset elastic force for the mounting seat 1002. A linkage block 1004 is provided on the front side of the mounting seat 1002.

[0032] As a preferred embodiment, the front side of the linkage block 1004 is provided with a slope that slides with the linkage push block 707, and the lower end of the linkage push block 707 is provided with a roller. The roller and the slope are in rolling contact, which can effectively reduce frictional resistance and make the movement of the linkage push block 707 smoother.

[0033] like Figures 6-7As shown, when cleaning is required, the telescopic cylinder 704 first moves the connecting plate 705 downward, and the connecting plate 705 moves the nested elastic pressure plate 706 downward simultaneously. The second pressure roller 9 squeezes the adhesive strip 6, pressing the adhesive strip 6 onto the surface of the collecting roller 2. Then, the telescopic cylinder 704 continues to extend, and the nested elastic pressure plate 706 is squeezed and contracted by the reaction force of the collecting roller 2. The linkage push block 707 moves downward under the drive of the connecting plate 705, and its lower roller slides along the slope of the linkage block 1004. The compression linkage block 1004 pushes the mounting base 1002 to slide inward along the positioning rod 1001, and the spring 1003 is compressed, so that the collecting roller 2 is completely separated from the contact surface with the dust removal roller 3. At the same time, the first pressure roller 8 moves downward under the drive of the connecting plate 705, squeezing the adhesive strip 6 to make it tightly adhere to the surface of the collecting roller 2, thereby achieving the dust removal and cleaning work on the surface of the collecting roller 2. The collecting roller 2 and the dust removal roller 3 remain separated during the cleaning process, effectively preventing relative friction between the collecting roller 2 and the dust removal roller 3 when the adhesive tape 6 is used for cleaning, thus protecting the service life of both roller surfaces. After cleaning is completed, the telescopic cylinder 704 retracts, and the spring 1003 resets, pushing the collecting roller 2 back towards the dust removal roller 3, restoring contact between the two and starting the next dust removal cycle.

[0034] It should be emphasized that the core improvement of this embodiment lies in the following: Addressing the problem in Embodiment 1 where the collecting roller 2 is simultaneously driven by both the dust removal roller 3 and the adhesive tape 6, and the resulting mismatch in linear speed due to changes in the winding radius leads to roller surface wear, this embodiment adds a telescopic cylinder 704 and an elastic mounting mechanism 10. The telescopic cylinder 704, through the connecting plate 705, drives the pressure roller downwards to squeeze the adhesive tape 6, while simultaneously using the linkage push block 707 to squeeze the elastic mounting mechanism 10 via the roller slope. This causes the collecting roller 2 to detach from the surface of the dust removal roller 3 during cleaning, preventing relative friction between the two. After cleaning, the spring 1003 automatically resets, causing the collecting roller 2 to re-engage with the dust removal roller 3, effectively protecting the roller surface life and achieving reliable switching between cleaning and dust removal conditions.

[0035] Example 3 In Example 2, the adhesive tape 6 comes into contact with the surface of the dust removal roller 3 during the cleaning process. At this time, the adhesive tape 6 is detached from the surface of the unwinding roller 5 and conveyed under the rotation of the dust removal roller 3. At the same time, the adhesive tape 6 is also subjected to the winding tension of the take-up roller 4. However, it is difficult to keep the winding speed of the take-up roller 4 and the rotational linear speed of the dust removal roller 3 in a consistent manner. After long-term use, the tension of the adhesive tape 6 is prone to imbalance: if the tension is too high, the adhesive tape 6 will be overstretched, making it difficult to smoothly adhere to the surface of the take-up roller 4, affecting the cleaning effect; if the tension is too low, the adhesive tape 6 is prone to loosening, wrinkling or deformation, which is not conducive to stable winding and smooth cleaning operation.

[0036] To solve the above problems, this embodiment further improves upon embodiment two. The difference is that a slide rail 708 is provided on the support component 1, and a gravity pressing slider 709 is slidably fitted inside the slide rail 708. The first pressure roller 8 is rotatably set at the bottom of the gravity pressing slider 709, and the winding speed of the winding roller 4 is less than the rotation speed of the dust removal roller 3.

[0037] like Figures 8-9 As shown, in this embodiment, when the take-up roller 4 performs cleaning operations, the unwinding speed of the unwinding roller 5 is kept the same as the surface linear velocity of the dust removal roller 3. Since the winding speed of the take-up roller 4 is set to be less than the rotational speed of the dust removal roller 3, an excess length segment will form in the adhesive strip 6 between the take-up roller 4 and the dust removal roller 3, resulting in a certain amount of slack. The gravity-pressing slider 709 drives the first pressure roller 8 to slide downward along the slide rail 708 under its own gravity. The first pressure roller 8 applies downward pressure to the slack adhesive strip 6, maintaining an appropriate tension in the adhesive strip 6 under the action of gravity, so that it is neither too tight nor too loose, while ensuring that the adhesive strip 6 can form a stable wrap angle with the take-up roller 4, so as to smoothly carry out the cleaning operation.

[0038] After cleaning, the telescopic cylinder 704 drives the second pressure roller 9 to reset, and the collecting roller 2, under the action of the spring 1003, re-engages with the dust removal roller 3, resuming normal dust removal operation. At this time, the take-up roller 4 does not stop rotating immediately, but continues to operate, gradually winding back the excess slack on the adhesive tape 6 until the tension is adjusted to a suitable level. As the take-up roller 4 continues to wind, the tension of the adhesive tape 6 gradually returns to normal, and the gravity-pressing slider 709 is lifted upward by the gradually tightened adhesive tape 6, slides along the slide rail 708, and finally moves to the uppermost position of the slide rail 708.

[0039] A sensor can be installed at the top of the slide rail 708. When the sensor detects that the gravity-pressing slider 709 has disengaged from the top of the slide rail 708, it indicates that the adhesive tape 6 is removing dust, and the take-up roller 4 immediately starts rotating to prepare for the next take-up. When the sensor detects that the gravity-pressing slider 709 has returned to the top of the slide rail 708, it indicates that the cleaning operation has ended, and the take-up roller 4 stops rotating, waiting for the next cleaning instruction. This solution achieves automatic tension balance of the adhesive tape 6 through gravity adaptive adjustment and speed difference, without the need for additional tension sensors or complex control systems.

[0040] This solution can be applied to pretreatment scenarios such as self-adhesive digital printing, satellite rotary printing presses, slitting machines, laminating machines, and coating machines, all of which fall within the protection scope of this patent.

[0041] It should be emphasized that the core improvement of this embodiment lies in the following: Addressing the tension imbalance problem in Embodiment 2 caused by the inconsistency between the winding speed and the linear speed of the dust removal roller 3 during cleaning of the adhesive tape 6, this embodiment employs a gravity-adaptive adjustment scheme. By setting a slide rail 708 and a gravity-pressing slider 709, the first pressure roller 8 automatically slides down under its own weight, applying downward pressure according to the slack of the adhesive tape 6, maintaining appropriate tension. Combined with the winding roller 4's speed setting being lower than that of the dust removal roller 3, a stable wrap angle is formed to ensure cleaning effectiveness. After cleaning, the winding roller 4 continues to rotate to tighten the adhesive tape 6, the gravity-pressing slider 709 is lifted and reset, and the sensing element at the top of the slide rail 708 detects the status and controls the start and stop of the winding roller 4, achieving automatic tension balance without the need for additional sensors.

[0042] Working principle: After the equipment is started, the cleaning mechanism enters standby mode. At this time, the first pressure roller 8 and the second pressure roller 9 are away from the collecting roller 2 and do not come into contact with it. The material moves in the conveying direction, driving the dust removal roller 3 to rotate synchronously. During the rotation, the dust removal roller 3 captures and adsorbs dust from the surface of the material. The collecting roller 2, which is in contact with the surface of the dust removal roller 3, rotates synchronously with the dust removal roller 3 under friction drive. With its high surface adhesion, it continuously captures dust from the surface of the dust removal roller 3. Dust accumulates on the surface of the collecting roller 2, completing the continuous dust removal operation.

[0043] When dust accumulates to a certain level on the surface of the collecting roller 2 and the dust removal effect decreases, the cleaning switching mechanism 7 is activated. The linear drive module 701 drives the drive slider 702 to move linearly in a preset direction, causing the first pressure roller 8 and the second pressure roller 9 on the support plate 703 to move towards the collecting roller 2. At the same time, the telescopic cylinder 704 begins to extend, causing the connecting plate 705 to move downward, and the nested elastic pressure plate 706 moves downward synchronously. The second pressure roller 9 first squeezes the adhesive tape 6, pressing the adhesive tape 6 onto the surface of the collecting roller 2.

[0044] The telescopic cylinder 704 continues to extend, and the nested elastic pressure plate 706 contracts and deforms under the reaction force of the collecting roller 2 to absorb stroke errors. The connecting plate 705 drives the linkage push block 707 to continue to move downward. The roller at the lower end of the linkage push block 707 rolls and slides along the slope of the linkage block 1004, squeezing the linkage block 1004 and pushing the mounting base 1002 to slide inward along the positioning rod 1001. The spring 1003 is compressed, and the collecting roller 2 completely separates from the contact surface with the dust removal roller 3, completing the separation action.

[0045] After the collecting roller 2 separates from the dust removal roller 3, the first pressure roller 8 moves downward under the drive of the connecting plate 705, squeezing the adhesive tape 6 to make it tightly adhere to the surface of the collecting roller 2. At this time, the take-up roller 4 continues to rotate at a set speed lower than the linear speed of the dust removal roller 3, and the unwind roller 5 unwinds at the same speed as the surface linear speed of the dust removal roller 3. The speed difference between the two causes the adhesive tape 6 to form an extra length section between the take-up roller 4 and the dust removal roller 3, producing a certain amount of slack. Under its own gravity, the gravity-pressing slider 709 drives the first pressure roller 8 to slide downward along the slide rail 708, applying downward pressure to the slack adhesive tape 6, maintaining appropriate tension in the adhesive tape 6, and forming a stable wrap angle between the adhesive tape 6 and the take-up roller 4. With its own adhesive properties, the adhesive tape 6 gradually removes and carries away the dust from the surface of the collecting roller 2 as it contacts the surface of the collecting roller 2 and is wound up with the take-up roller 4, completing the cleaning operation. The sensor at the top of the slide rail 708 detects that gravity is pressing the slider 709 out of the top position, confirming that cleaning is in progress, and the take-up roller 4 continues to operate.

[0046] After cleaning, the telescopic cylinder 704 retracts, the connecting plate 705 drives the second pressure roller 9 to move upward and reset, and the nested elastic pressure plate 706 returns to its initial state. The linkage push block 707 moves upward with the connecting plate 705, the linkage block 1004 is no longer compressed, the spring 1003 releases its elastic force, pushing the mounting base 1002 to slide outward along the positioning rod 1001, and the collecting roller 2 is pushed back onto the surface of the dust removal roller 3, restoring contact between the two. Simultaneously, the take-up roller 4 continues to operate, gradually winding back the excess slack on the adhesive tape 6. The tension of the adhesive tape 6 gradually returns to normal, and the gravity-pressing slider 709 is lifted upward by the gradually tightening adhesive tape 6, sliding along the slide rail 708 and finally returning to the uppermost position of the slide rail 708. The sensing element at the uppermost end of the slide rail 708 detects the return of the gravity-pressing slider 709, confirming the cleaning is complete. The take-up roller 4 stops rotating, awaiting the next cleaning instruction. The equipment then returns to standby dust removal mode and enters the next work cycle.

[0047] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed application.

Claims

1. A cleaning mechanism comprising a collecting roller (2) and a dust-removing roller (3) fixedly mounted on a support member (1), wherein the surface of the collecting roller (2) has a greater adhesiveness than the surface of the dust-removing roller (3), the surface of the collecting roller (2) is in contact with the dust-removing roller (3), the dust-removing roller (3) is used to collect dust from the surface of a material, and the collecting roller (2) is used to remove dust from the surface of the dust-removing roller (3), characterized in that: The inner side of the support component (1) is provided with a take-up roller (4) and an unwind roller (5). The side of the unwind roller (5) is wrapped with an adhesive tape (6). The take-up roller (4) rotates actively to wrap the adhesive tape (6) on the side of the unwind roller (5) to the side of the take-up roller (4). The support component (1) is also provided with a cleaning switching mechanism (7). The output end of the cleaning switching mechanism (7) is provided with a first pressure roller (8) and a second pressure roller (9). The cleaning switching mechanism (7) can drive the first pressure roller (8) and the second pressure roller (9) to move, thereby driving the adhesive belt (6) to cooperate with the collecting roller (2) to clean the dust on the surface of the collecting roller (2).

2. The cleaning mechanism as described in claim 1, characterized in that, The cleaning switching mechanism (7) includes a linear drive module (701) fixedly mounted on the support component (1), a drive slider (702) is provided on the linear drive module (701), and multiple sets of support plates (703) are fixedly mounted on the drive slider (702). The first pressure roller (8) and the second pressure roller (9) are rotatably connected to the corresponding support plate (703) to realize the transmission of the first pressure roller (8) and the second pressure roller (9).

3. A cleaning mechanism as described in claim 2, characterized in that, The first pressure roller (8), the second pressure roller (9), the collecting roller (2) and the dust removal roller (3) are all provided in two sets, symmetrically arranged along the material surface. The driving slider (702) drives the linear driving module (701) back and forth between the two working surfaces, driving the first pressure roller (8) and the second pressure roller (9) on both sides to move, thereby pressing the adhesive tape (6).

4. A cleaning mechanism as described in claim 1, characterized in that, A telescopic cylinder (704) is fixedly installed on the support component (1). A connecting plate (705) is fixedly installed at the extension end of the telescopic cylinder (704). A nested elastic pressure plate (706) is fixedly installed at one end of the connecting plate (705). The second pressure roller (9) is rotatably connected to the end of the nested elastic pressure plate (706). The other end is fixedly connected to a linkage push block (707). The support component (1) is provided with an elastic mounting mechanism (10) for positioning the collecting roller (2). The elastic mounting mechanism (10) will shrink when squeezed by the linkage push block (707), so that the collecting roller (2) is separated from the surface of the dust removal roller (3).

5. A cleaning mechanism as described in claim 4, characterized in that, The first pressure roller (8) is rotatably connected to the connecting plate (705) near the end of the linkage push block (707).

6. A cleaning mechanism as described in claim 5, characterized in that, The elastic mounting mechanism (10) includes a positioning rod (1001) fixedly mounted on the support component (1), a mounting base (1002) slidably fitted at the end of the positioning rod (1001), a spring (1003) fitted between the mounting base (1002) and the positioning rod (1001), and a linkage block (1004) provided on the front side of the mounting base (1002).

7. A cleaning mechanism as described in claim 6, characterized in that, The front side of the linkage block (1004) is provided with a slope that slides with the linkage push block (707), and the lower end of the linkage push block (707) is provided with a roller.

8. A cleaning mechanism as described in claim 4, characterized in that, The support component (1) is provided with a slide rail (708), and a gravity pressing slider (709) is slidably fitted inside the slide rail (708). The first pressure roller (8) is rotatably disposed at the bottom of the gravity pressing slider (709), and the winding speed of the winding roller (4) is less than the rotation speed of the dust removal roller (3).

9. A cleaning mechanism as described in claim 3, 7, or 8, characterized in that, The dust removal roller (3) is a low-viscosity silicone rubber dust removal roller (3), the collection roller (2) is a medium / high viscosity silicone rubber or PU collection roller (2), and the adhesive tape (6) is a dust-adhesive paper roll.

10. A self-adhesive digital printing device, characterized in that, Including the cleaning facility as described in any one of claims 1-9.

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