Automatic cleaning device for end printing ink recovered by printing plate roller and using method of automatic cleaning device

Abstract

The invention discloses an end ink automatic cleaning device for printing plate roller recovery and a using method thereof, and relates to the field of printing plate roller recovery, and the technical scheme is that the end ink automatic cleaning device comprises a machine table, a middle positioning and clamping mechanism is arranged in the middle of the machine table, and the automatic cleaning device further comprises a driving mechanism, the driving mechanisms are arranged on the machine table, are positioned on two sides of the middle positioning and clamping mechanism and are used for driving the brush discs to rotate while rotating; the pushing mechanism is used for pushing the driving mechanism and the brush disc to move; the cleaning fluid spraying mechanism is used for spraying cleaning fluid to the two ends of the printing plate roller; and the power-on and power-off structure is arranged on the positioning and clamping mechanism, power can be supplied to the device only when the printing plate roller is placed on the middle positioning and clamping mechanism, so that misoperation is avoided, the effect is that automatic cleaning of the printing plate roller is achieved through mechanical movement, and the cleaning efficiency and uniformity are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of recycling of printing plate cylinders, and more specifically, to an automatic end-ink cleaning device for recycling printing plate cylinders and a method for using the same. Background Art

[0002] In the production and operation of the printing industry, printing plate cylinders, as core consumables, need to be recycled and reprocessed after a certain period of use to achieve efficient recycling of resources and reduce production costs. However, during the use of printing plate cylinders, a large amount of ink and paint residues inevitably remain at both ends, which will seriously affect the electrical conductivity of the printing plate cylinders. The integrity of the conductive function is a key prerequisite for subsequent reprocessing processes such as electro-engraving and chrome plating of printing plate cylinders. The residual ink and paint will cause problems such as uneven current distribution and poor coating adhesion during the reprocessing process, thereby reducing the recycling quality and service life of the printing plate cylinders and increasing the production costs of enterprises.

[0003] Currently, the cleaning of the end-ink of printing plate cylinders mainly relies on manual operation. Operators need to manually wipe and clean the ends of the printing plate cylinders with cleaning tools. This cleaning method has many disadvantages. On the one hand, manual cleaning is inefficient and cannot meet the recycling and processing requirements of a large number of printing plate cylinders, resulting in an extended recycling cycle and affecting the production progress of enterprises. On the other hand, the cleaning effect of manual cleaning largely depends on the experience and working status of the operators, and it is easy to have incomplete cleaning, making it difficult to ensure the cleaning quality of the ends of the printing plate cylinders, and thus affecting the subsequent reprocessing effect.

[0004] In addition, the existing printing plate cylinder cleaning equipment has deficiencies in safety design and lacks an effective anti-misoperation mechanism. In the case where the printing plate cylinder to be cleaned is not placed on the equipment, if the start button is accidentally touched by the operator or the equipment control system fails, the cleaning device may be accidentally started, which will not only cause energy waste and idling wear of the equipment, but also pose a safety threat to the nearby operators. At the same time, the upper brush disk only rotates self-rotationally, which is likely to cause excessive cleaning in some areas and insufficient cleaning in other areas, reducing the overall cleaning effect and efficiency.

[0005] Therefore, in order to solve the above technical problems, the present application proposes an automatic end-ink cleaning device for recycling printing plate cylinders and a method for using the same. Summary of the Invention

[0006] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an automatic end-ink cleaning device for recycling printing plate cylinders and a method for using the same.

[0007] To achieve the above object, the present invention provides the following technical solutions: An automatic end ink cleaning device for printing plate cylinder recycling, including a machine table, with a central positioning and clamping mechanism arranged in the middle of the machine table, characterized in that: The automatic cleaning device further includes: A driving mechanism, which is arranged on both sides of the central positioning and clamping mechanism on the machine table and is used to drive multiple brush discs to rotate while rotating. A propulsion mechanism, which is used to push the driving mechanism and the brush discs to move. A cleaning liquid spraying mechanism, which is used to spray cleaning liquid on both ends of the printing plate cylinder. A power-on and power-off structure, which is arranged on the positioning and clamping mechanism. When the printing plate cylinder is placed on the central positioning and clamping mechanism, the device can be powered to avoid misoperation.

[0008] Preferably, the driving mechanism, the propulsion mechanism, and the cleaning liquid spraying mechanism are all controlled by a PLC control system. The PLC control system is preset with the propulsion distance parameters of the brush discs and can automatically adjust the propulsion distance of the brush discs according to different specifications of the printing plate cylinders, so that the brush discs apply sufficient pressure to the ink layer to completely clean the ink paint.

[0009] Preferably, the central positioning and clamping mechanism includes an electro-hydraulic rod fixed to the middle part of the inner top wall of the machine table. A pressing block is installed on the transmission part of the electro-hydraulic rod, and a placing seat is fixedly connected to the middle part of the inner bottom wall of the machine table.

[0010] Preferably, the propulsion mechanism includes a connecting shell A fixed to both sides of the inner top wall of the machine table with an open bottom. A lead screw driven by a motor B is installed inside the connecting shell A. A rod sleeve is threadedly connected to the outer side wall of the lead screw, and the other end of the lead screw connected to the motor B is rotatably connected to the inner side wall of the connecting shell A through a bearing. The bottom end of the rod sleeve is connected to the moving part through a vertical rod. A sliding rod is supported by a vertical plate on the inner bottom wall of the machine table, and a sliding sleeve is slidably connected to the outer side wall of the sliding rod. The top end of the sliding sleeve is fixed to the bottom end of the moving part.

[0011] Preferably, the driving mechanism includes a mounting plate fixed on the surface of the moving part. A motor A is installed in the middle of the surface of the mounting plate. A turntable is installed on the transmission part of the motor A, and a plurality of gears are rotatably connected to the surface of the turntable through bearings. Both the upper and lower sides of the surface of the mounting plate are connected to an annular toothed plate through a cross bar. The outer side wall of the gear is meshed with the inner side wall of the annular toothed plate, and the surface of the gear is connected to the brush disc.

[0012] Preferably, the cleaning liquid spraying mechanism includes a connecting plate fixed on the top of the annular toothed plate. A cleaning liquid tank is installed on the surface of the connecting plate, and a plurality of electric spray nozzles are installed at the bottom end of the cleaning liquid tank.

[0013] Preferably, the movable part is a connecting shell B fixed between the vertical rod and the sliding sleeve and opening toward the middle positioning clamping mechanism surface, the interior of the connecting shell B is slidably connected to an inner plate, the surface of the inner plate is fixedly connected to a connecting rod extending from the connecting shell B, and the head of the connecting rod is fixedly connected to a front plate connected to the mounting plate, and a spring is installed between the inner surface of the connecting shell B and the inner plate.

[0014] Preferably, the upper and lower sides of the interior of the connecting shell B are fixedly connected with guide rails, and the upper and lower sides of the inner plate are slidably connected in the guide rails through sliders.

[0015] Preferably, the power-on and power-off structure includes a groove on the inner surface of the placement seat, and a spring switch for controlling the power switch of the device is installed inside the groove. When the printing plate roller is placed in the placement seat, the spring switch will be squeezed and contracted into the groove, thereby turning on the power of the device.

[0016] The method of using the above-mentioned printing plate roller end ink automatic cleaning device comprises the following steps: Step 1: The operator places the printing plate roller to be cleaned horizontally on the placement seat on the bottom wall of the machine, ensuring that the printing plate roller is stably seated. The weight of the printing plate roller squeezes the spring switch in the groove of the placement seat, causing it to shrink and turn on the main power supply of the device. The device is activated only after the printing plate roller is completely placed to avoid misoperation. The electric hydraulic rod is controlled to move downward, driving the pressure block to press the upper surface of the printing plate roller through the arc groove, and cooperate with the placement seat to fix the printing plate roller to ensure that there is no displacement during the cleaning process; Step 2: The PLC control system drives the motor B to rotate according to the preset specifications of the printing plate roller, and drives the moving part to translate through the screw-rod sleeve transmission, so that the brush plate is pushed to the end of the printing plate roller to the initial cleaning position. At the same time, the PLC starts the motor A to drive the turntable to rotate, so that the gear revolves around the axis of the printing plate roller, and at the same time, due to the meshing with the fixed annular gear plate, it rotates, and the brush plate performs a planetary motion of "rotation + revolution", forming a spiral cleaning trajectory, covering the entire area of the end; Step 3: When the brush plate approaches the end of the printing plate roller, the PLC controls the electric nozzle to open and spray the cleaning liquid from the cleaning liquid tank to the contact area, softening the ink layer and cooperating with the mechanical friction of the brush bristles to peel off the residual paint. During the cleaning process, the propulsion mechanism then feeds through the screw rod. The PLC combines the motor B encoder to monitor the displacement in real time and dynamically adjust the propulsion speed to ensure that the brush plate applies constant pressure to the ink layer. If stubborn ink or local protrusions are encountered, the spring in the moving part compresses the buffer and automatically adjusts the contact pressure. Step 4: After cleaning is completed, motor B reverses, the brush plate returns to the initial position, the electric nozzle stops spraying, and motor A stops synchronously; Step 5: Control the piston rod of the electro-hydraulic rod to retract, raise the pressing block to release the printing plate cylinder, the operator takes out the cleaned printing plate cylinder, the weight of the printing plate cylinder is removed from the placement seat, and the spring switch automatically resets due to the elastic force of the high-elastic spring inside, disconnecting the power supply of the device.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The driving mechanisms on both sides of the middle positioning and clamping mechanism of the present invention drive multiple brush disks to work in a compound motion mode of "rotating while revolving" - while the brush disks rotate at high speed by themselves, they revolve around the axis of the printing plate cylinder to form a three-dimensional cleaning trajectory covering the entire end area of the printing plate cylinder, effectively solving the problem of excessive or insufficient local cleaning of the single self-rotating brush disk in the background art; 2. The operator of the present invention places the printing plate cylinder to be cleaned on the middle positioning and clamping mechanism in the middle of the machine table for positioning. At this time, the power-on and power-off structure arranged on the positioning and clamping mechanism will trigger the conduction of the power supply circuit of the device, avoiding misoperation startup when the printing plate cylinder is not placed, and effectively solving the problem of misoperation in the background art; 3. The present invention realizes automatic cleaning of the printing plate cylinder through mechanical movement, significantly improving the cleaning efficiency and uniformity, and effectively solving the problems of low efficiency and poor effect in manual cleaning and traditional equipment in the background art; 4. When encountering stubborn ink or local protrusions at the end of the printing plate cylinder in the present invention, the brush disks and the driving mechanisms will be resisted and retracted backward, thereby driving the movement of the front plate. The front plate drives the connecting rod to move inside the connecting shell B, and the connecting rod drives the movement of the inner plate, so that the spring is compressed to absorb the excess impact force, avoiding sudden pressure changes caused by rigid contact of the brush disks, and at the same time providing a continuous rebound force to the driving mechanisms and the brush disks to maintain the grinding force. In this way, it can not only ensure the effective grinding force of the bristles on the ink layer, but also prevent damage to the surface plating of the printing plate cylinder due to excessive pressure; significantly improving the compatibility of the equipment with different specifications of printing plate cylinders and the cleaning adaptability to complex curved surfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings: Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is the present invention Figure 1 A partial enlarged view of the structure; Figure 3 is the present invention Figure 1 Another perspective specific structure diagram of the present invention; Figure 4 is the present inventionFigure 3 Enlarged view of the partial structure B; Figure 5 Schematic diagram of the specific structure of the propulsion mechanism in the present invention; Figure 6 Schematic diagram of the specific structure of the propulsion mechanism in the present invention after removing the front plate; Figure 7 Schematic diagram of the structure inside the connecting shell B of the present invention behind the inner plate; Figure 8 Schematic diagram of the specific structures of the driving mechanism and the cleaning liquid spraying mechanism in the present invention; Figure 9 of the present invention Figure 8 Schematic diagram of the specific structure from another angle; Figure 10 Schematic diagram of the specific structure of the driving mechanism in the present invention after removing the brush disc.

[0019] In the figure: 1, machine platform; 2, positioning and clamping mechanism; 201, electro-hydraulic rod; 202, pressing block; 203, placing seat; 3, driving mechanism; 301, mounting plate; 302, motor A; 303, turntable; 304, gear; 305, cross bar; 306, annular toothed plate; 4, propulsion mechanism; 401, connecting shell A; 402, motor B; 403, lead screw; 404, rod sleeve; 405, vertical rod; 406, moving part; 4061, connecting shell B; 4062, inner plate; 4063, connecting rod; 4064, spring; 4065, guide rail; 4066, slider; 4067, front plate; 407, vertical plate; 408, slide bar; 409, slide sleeve; 5, cleaning liquid spraying mechanism; 501, connecting plate; 502, cleaning liquid tank; 503, electric spray head; 6, brush disc; 7, power on / off structure; 701, groove; 702, spring switch. Specific implementation mode

[0020] Example 1 As Figure 1 and Figure 3 shown, the present invention provides an automatic cleaning device for the end ink of a printing plate roller recovery, including a machine platform 1, a central positioning and clamping mechanism 2 is arranged in the middle of the machine platform 1, and the automatic cleaning device further includes: A driving mechanism 3, which is arranged on the machine platform 1 on both sides of the central positioning and clamping mechanism 2, and is used to drive the rotation of multiple brush discs 6 while rotating; A propulsion mechanism 4, which is used to push the driving mechanism 3 and the brush disc 6 to move; The cleaning liquid spraying mechanism 5 is used to spray the cleaning liquid on both ends of the printing plate cylinder. The power-on and power-off structure 7 is arranged on the positioning and clamping mechanism 2. Only when the printing plate cylinder is placed on the middle positioning and clamping mechanism 2 can the device be powered on to avoid misoperation.

[0021] During use, the operator places the printing plate cylinder to be cleaned on the middle positioning and clamping mechanism 2 in the middle of the machine table 1 for positioning. At this time, the power-on and power-off structure 7 arranged on the positioning and clamping mechanism 2 will trigger the conduction of the device power supply circuit, avoiding misoperation start when the printing plate cylinder is not placed; after power-on, the printing plate cylinder is clamped by the middle positioning and clamping mechanism 2, and then the driving mechanism 3 on both sides of the middle positioning and clamping mechanism 2 drives multiple brush discs 6 to work in a compound motion mode of "rotating while revolving" - while the brush discs 6 rotate at high speed by themselves, they revolve around the axis of the printing plate cylinder to form a three-dimensional cleaning track covering the entire area of the ends of the printing plate cylinder, effectively solving the problems of excessive or insufficient local cleaning existing in the traditional single self-rotating brush disc 6. At the same time, the propulsion mechanism 4 moves the driving mechanism 3 and the brush discs 6 towards the ends of the printing plate cylinder according to the specification parameters of the printing plate cylinder. When the bristles of the brush discs 6 contact the ink layer at the ends of the printing plate cylinder, the cleaning liquid spraying mechanism 5 simultaneously sprays the cleaning liquid on the contact area, so that the cleaning liquid wets the ink layer in real time during the mechanical brushing process of the brush discs 6. Through the synergistic action of the high-frequency friction of the bristles of the brush discs 6 and the chemical dissolution of the cleaning liquid, the residual ink is efficiently peeled off and removed. During the cleaning process, the propulsion mechanism 4 continuously controls the propulsion distance and contact pressure of the brush discs 6 to ensure that the ends of different specification printing plate cylinders can be completely covered by the compound motion of the brush discs 6, avoiding cleaning dead corners. When the brush discs 6 complete the preset cleaning stroke and the ink at the ends of the printing plate cylinder is completely removed, the propulsion mechanism 4 drives the brush discs 6 to return to the initial position, the driving mechanism 3 stops operating, and the cleaning liquid spraying mechanism 5 stops spraying simultaneously, completing an automated cleaning process. Throughout the process, the automatic cleaning of the printing plate cylinder is realized through mechanical movement, significantly improving the cleaning efficiency and uniformity, and fundamentally solving the problems of low efficiency and poor effect existing in manual cleaning and traditional equipment.

[0022] Furthermore, the driving mechanism 3, the propulsion mechanism 4, and the cleaning liquid spraying mechanism 5 are all controlled by the PLC control system. The propulsion distance parameters of the brush discs 6 are preset in the PLC control system, and the propulsion distance of the brush discs 6 can be automatically adjusted according to different specification printing plate cylinders, so that the brush discs 6 apply sufficient pressure to the ink layer to completely clean the ink paint. In this way, the driving mechanism 3, the propulsion mechanism 4, and the cleaning liquid spraying mechanism 5 are uniformly controlled by the PLC control system. The PLC can automatically match the cleaning schemes for different specification printing plate cylinders according to the preset parameter library, and at the same time, the rotation speed, propulsion pressure, and cleaning liquid flow rate of the brush discs 6 are adjusted in real time through closed-loop feedback to ensure the consistency of the cleaning effect.

[0023] Embodiment 2 As Figures 1 - 5 , Figures 8 - 10 shown, this embodiment provides the specific structures of the central positioning and clamping mechanism 2, the driving mechanism 3, the propulsion mechanism 4, the cleaning liquid spraying mechanism 5, and the power-on and power-off structure 7 in Embodiment 1: The propulsion mechanism 4 is controlled by a PLC control system. The propulsion distance parameter of the brush disk 6 is preset in the PLC control system, and it can automatically adjust the propulsion distance of the brush disk 6 according to printing plate cylinders of different specifications, so that the brush disk 6 applies sufficient pressure to the ink layer to completely clean the ink paint. The central positioning and clamping mechanism 2 includes an electro-hydraulic rod 201 fixed to the middle part of the inner top wall of the machine table 1. A pressure block 202 is installed on the transmission part of the electro-hydraulic rod 201. A placement seat 203 is fixedly connected to the middle part of the inner bottom wall of the machine table 1. The propulsion mechanism 4 includes connection shells A401 fixed to both sides of the inner top wall of the machine table 1 and open at the bottom. A lead screw 403 driven by a motor B402 is installed inside the connection shell A401. A rod sleeve 404 is threadedly connected to the outer side wall of the lead screw 403. The other end of the lead screw 403 connected to the motor B402 is rotatably connected to the inner side wall of the connection shell A401 through a bearing. The bottom end of the rod sleeve 404 is connected to a moving part 406 through a vertical rod 405. A slide bar 408 is supported on the inner bottom wall of the machine table 1 by a vertical plate 407. A slide sleeve 409 is slidably connected to the outer side wall of the slide bar 408. The top end of the slide sleeve 409 is fixed to the bottom end of the moving part 406. The driving mechanism 3 includes a mounting plate 301 fixed to the surface of the moving part 406. A motor A302 is installed in the middle of the surface of the mounting plate 301. A turntable 303 is installed on the transmission part of the motor A302. A plurality of gears 304 are rotatably connected to the surface of the turntable 303 through bearings. Both the upper and lower sides of the surface of the mounting plate 301 are connected to an annular toothed plate 306 through cross bars 305. The outer side wall of the gear 304 is meshed with the inner side wall of the annular toothed plate 306. The surface of the gear 304 is connected to the brush disk 6. The cleaning liquid spraying mechanism 5 includes a connecting plate 501 fixed to the top of the annular toothed plate 306. A cleaning liquid tank 502 is installed on the surface of the connecting plate 501. A plurality of electric spray nozzles 503 are installed at the bottom end of the cleaning liquid tank 502. The power-on and power-off structure 7 includes a groove 701 opened on the inner surface of the placement seat 203. A spring switch 702 for controlling the power switch of the device is installed inside the groove 701. When the printing plate cylinder is placed in the placement seat 203, the spring switch 702 will be squeezed and retracted into the groove 701, thereby turning on the device power supply.

[0024] When in use, the operator places the printing plate roller to be cleaned horizontally on the placement seat 203 on the inner bottom wall of the machine 1. The weight or contact force of the printing plate roller causes the spring switch 702 in the groove 701 on the inner surface of the placement seat 203 to be compressed and contracted, triggering the power-on and power-off structure 7 to conduct the main power supply of the device (such as a 24V DC power supply or a 380V industrial power supply). At this time, the device is only activated when the printing plate roller is placed to avoid misoperation. The mechanical structure design of the spring switch 702 ensures that the power circuit will be connected only when the printing plate roller is completely seated on the placement seat 203, forming a physical safety interlock.

[0025] After the power is turned on, the electric hydraulic rod 201 is controlled to move downward, and the piston rod of the electric hydraulic rod 201 drives the pressing block 202 to move vertically downward until the bottom surface of the pressing block 202 is in close contact with the upper surface of the printing plate roller. The top surface of the placement seat 203 and the pressing block 202 are both designed with an arc groove 701 that matches the outer circle of the printing plate roller. In this way, the printing plate roller is stably fixed on the machine table 1 through mechanical positioning and hydraulic pressure, ensuring that the printing plate roller has no radial runout or axial displacement during the cleaning process.

[0026] After the fixation is completed, the PLC control system calculates and outputs a signal to the motor B402 (servo motor or stepper motor) according to the preset printing plate roller specification parameters (end length). The motor B402 drives the screw rod 403 to rotate clockwise. The screw rod 403 and the rod sleeve 404 cooperate with each other through trapezoidal threads or ball threads to convert the rotational motion into linear motion, so that the rod sleeve 404 moves axially along the screw rod 403. The rod sleeve 404 is fixedly connected to the moving part 406 through the vertical rod 405, and the sliding sleeve 409 slides on the sliding rod 408 (the sliding rod 408 is horizontally supported by the vertical plate 407 on the inner bottom wall of the machine 1) to ensure the translational motion of the moving part 406. Through the high-precision transmission of the screw rod 403, the brush plate 6 is pushed toward the end of the printing plate roller with the moving part 406 until it reaches the initial cleaning position preset by the PLC (5 to 10 mm from the end face of the printing plate roller).

[0027] At the same time, the PLC starts the motor A302 (variable frequency motor), and the output shaft of the motor A302 drives the turntable 303 to rotate. The multiple gears 304 connected to the surface of the turntable 303 through bearings rotate around the axis of the printing plate roller. At the same time, the gear 304 meshes with the inner tooth surface of the annular gear plate 306 (rigidly connected to the mounting plate 301 through the cross bar 305) fixed on the mounting plate 301. Since the annular gear plate 306 is fixed, the gear 304 is forced to rotate while revolving. The brush plate 6 is fixed on the end face of the gear 304, and performs the planetary motion of "rotation + revolution" synchronously with the gear 304. The trajectory of its bristles forms a spiral or a sine curve, covering the entire circumference of the end of the printing plate roller, including complex structures such as edge chamfers and the periphery of the mounting hole, solving the cleaning dead corner problem of the traditional single self-rotating brush plate 6.

[0028] When the brush disk 6 approaches the end of the printing plate roller (at a distance of 2 - 3 mm), the PLC sends an opening signal to the electric spray head 503. The cleaning liquid (such as an environmentally friendly solvent or a water-based cleaning agent) in the cleaning liquid tank 502 (fixed to the top of the annular tooth plate 306 through the connecting plate 501) is transported through the pipeline to the electric spray head 503 and sprayed onto the area to be cleaned at the end of the printing plate roller in a fan-shaped or atomized mode. The ink is softened by chemical dissolution, and the residual paint is peeled off by the mechanical friction of the brush bristles.

[0029] During the feeding process of the lead screw 403 of the propulsion mechanism 4 (continuous feeding during the cleaning process), the PLC real-time monitors the displacement of the rod sleeve 404 through the encoder of the motor B402, and combines the preset propulsion distance parameter to dynamically adjust the rotation speed of the motor B402 to ensure that the brush disk 6 applies a constant pressure to the ink layer. After the cleaning stroke is completed (judged by the displacement sensor or the time relay), the motor B402 rotates in reverse, driving the brush disk 6 to retract along the original path to the initial position. When the brush disk 6 is completely retracted, by controlling the piston rod of the electro-hydraulic rod 201 to retract, the pressing block 202 rises to release the printing plate roller, and the operator can take out the cleaned printing plate roller. At this time, the weight of the printing plate roller is removed from the placement seat 203, and the spring switch 702 automatically resets due to the elastic force of the high-elastic spring inside, thereby disconnecting the power supply of the device.

[0030] Embodiment 3 As Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 、and Figure 7 shown, this embodiment gives the specific structure of the moving part 406 in Embodiment 2: The moving part 406 is a connecting shell B4061 fixed between the vertical rod 405 and the sliding sleeve 409 and opening towards the middle positioning and clamping mechanism 2. An inner plate 4062 is slidably connected inside the connecting shell B4061. A connecting rod 4063 extending from the connecting shell B4061 is fixedly connected to the surface of the inner plate 4062, and a front plate 4067 connected to the mounting plate 301 is fixedly connected to the head of the connecting rod 4063. A spring 4064 is installed between the inner surface of the connecting shell B4061 and the inner plate 4062.

[0031] Through the spring 4064 between the connecting shell B4061 and the inner plate 4062, an elastic buffer is formed when the brush disk 6 contacts the end of the printing plate roller, enabling the brush disk 6 to automatically adjust the contact pressure according to the surface curvature of the printing plate roller and the hardness of the ink layer on the basis of the preset propulsion distance in the PLC control system. When encountering stubborn ink or local protrusions at the end of the printing plate roller, the brush disk 6 and the driving mechanism 3 will be resisted and retracted backward, thereby driving the movement of the front plate 4067. The front plate 4067 drives the connecting rod 4063 to move into the connecting shell B4061, and the connecting rod 4063 drives the movement of the inner plate 4062, so that the spring 4064 is compressed to absorb the excess impact force, avoiding sudden pressure changes caused by rigid contact of the brush disk 6, while providing a continuous rebounding force to the driving mechanism 3 and the brush disk 6 to maintain the grinding force (the compression amount of the spring 4064 is proportional to the contact resistance. While buffering the impact, the contact pressure between the bristles and the surface of the printing plate roller is automatically adjusted through elastic deformation - the greater the resistance, the greater the compression amount of the spring 4064, the deeper the bristles are pressed into the ink layer, and the corresponding grinding force is enhanced, forming a self-adjustment mechanism of 'contact resistance - elastic feedback - pressure compensation' to ensure that stubborn ink can be effectively peeled off while avoiding the pressure exceeding the bearing limit of the plating layer of the printing plate roller). In this way, it can not only ensure the effective grinding force of the bristles on the ink layer, but also prevent damage to the surface plating layer of the printing plate roller due to excessive pressure; significantly improve the compatibility of the equipment with printing plate rollers of different specifications and the cleaning adaptability to complex curved surfaces. When the inner plate 4062 moves, it will drive the movement of the slider 4066, and the slider 4066 slides along the guide rail 4065 to maintain the linear movement of the inner plate 4062, ensuring that it always translates along the preset direction during the compression or stretching of the spring 4064, avoiding tilting or deviation caused by lateral force, so that the contact pressure between the brush disk 6 and the end of the printing plate roller is evenly distributed, and preventing local over-cleaning or under-cleaning caused by deviation of the movement track.

[0032] The present invention also provides a usage method for the above-mentioned automatic cleaning device for the end ink of the printing plate roller recovery: Step 1: The operator horizontally places the printing plate roller to be cleaned on the placement seat 203 on the inner bottom wall of the machine table 1, ensuring that the printing plate roller is stably seated. The weight of the printing plate roller squeezes the spring switch 702 in the groove 701 of the placement seat 203, causing it to contract and turn on the main power supply of the device. The device is only activated after the printing plate roller is completely placed to avoid misoperation. Control the electro-hydraulic rod 201 to move downward, and drive the pressing block 202 to press the upper surface of the printing plate roller through the arc-shaped groove, and cooperate with the placement seat 203 to fix the printing plate roller to ensure no displacement during the cleaning process; Step 2: The PLC control system drives the motor B402 to rotate according to the preset printing plate cylinder specification parameters. Through the transmission of the lead screw 403 and the rod sleeve 404, it drives the moving part 406 to translate, so that the brush disk 6 advances towards the end of the printing plate cylinder to the initial cleaning position. At the same time, the PLC starts the motor A302 to drive the turntable 303 to rotate, making the gear 304 revolve around the axis of the printing plate cylinder, and at the same time rotate due to meshing with the fixed annular tooth plate 306. The brush disk 6 then makes a planetary motion of "self-rotation + revolution", forming a spiral cleaning track to cover the entire end area; Step 3: When the brush disk 6 approaches the end of the printing plate cylinder, the PLC controls the electric spray head 503 to open, and sprays the cleaning liquid from the cleaning liquid tank 502 to the contact area, softening the ink layer and cooperating with the mechanical friction of the bristles to peel off the residual paint. During the cleaning process, the propulsion mechanism then feeds through the lead screw 403. The PLC combines the encoder of the motor B402 to monitor the displacement in real time and dynamically adjusts the propulsion speed to ensure that the brush disk 6 applies a constant pressure to the ink layer. If encountering stubborn ink or local protrusions, the spring 4064 inside the moving part 406 compresses and buffers to automatically adjust the contact pressure; Step 4: After the cleaning is completed, the motor B402 rotates in reverse, the brush disk 6 retracts to the initial position, the electric spray head 503 stops spraying, and the motor A302 stops synchronously; Step 5: Control the piston rod of the electro-hydraulic rod 201 to retract, the pressing block 202 rises to release the printing plate cylinder, the operator takes out the cleaned printing plate cylinder, the weight of the printing plate cylinder is removed from the placing seat 203, and the spring switch 702 automatically resets due to the elastic force of the high-elastic spring inside it, disconnecting the power supply of the device.

[0033] The automatic end ink cleaning device for the recycling of the printing plate cylinder and its use method of the present invention have the following advantages: Driven by the drive mechanism 3 on both sides of the middle positioning and clamping mechanism 2, multiple brush disks 6 work in a compound motion mode of "rotating while self-rotating" - while the brush disk 6 rotates at high speed by itself, it makes a circumferential rotation around the axis of the printing plate cylinder, forming a three-dimensional cleaning track covering the entire end area of the printing plate cylinder, effectively solving the problems of excessive or insufficient local cleaning existing in the single self-rotating brush disk 6 in the background technology; The operator places the printing plate cylinder to be cleaned on the middle positioning and clamping mechanism 2 in the middle of the machine table 1 for positioning. At this time, the power-on and power-off structure 7 arranged on the positioning and clamping mechanism 2 will trigger the conduction of the device power supply circuit, avoiding misoperation startup when the printing plate cylinder is not placed, and effectively solving the problem of misoperation in the background technology; The automatic cleaning of the printing plate cylinder is realized through mechanical movement, significantly improving the cleaning efficiency and uniformity, and effectively solving the problems of low efficiency and poor effect existing in manual cleaning and traditional equipment in the background technology; When encountering stubborn ink or local protrusions at the end of the printing plate cylinder, the brush disc 6 and the drive mechanism 3 will be resisted and retracted backward, thus driving the movement of the front plate 4067. The front plate 4067 drives the connecting rod 4063 to move inside the connecting shell B4061. The connecting rod 4063 drives the movement of the inner plate 4062, so that the spring 4064 is compressed to absorb the excess impact force, avoid sudden pressure changes caused by rigid contact of the brush disc 6, and at the same time provide a continuous rebounding force for the drive mechanism 3 and the brush disc 6 to maintain the grinding force. In this way, it can not only ensure the effective grinding force of the bristles on the ink layer, but also prevent damage to the surface plating of the printing plate cylinder due to excessive pressure; significantly improve the compatibility of the equipment with printing plate cylinders of different specifications and the cleaning adaptability to complex curved surfaces.

[0034] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention; any ordinary technical personnel in the industry can smoothly implement the present invention as shown in the accompanying drawings of the specification and the above description; however, any slight changes, modifications and equivalent changes made by those skilled in the art within the scope of the technical solution of the present invention by using the technical content disclosed above are equivalent embodiments of the present invention; at the same time, any changes, modifications and equivalent changes made to the above embodiments based on the essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. An automatic end-ink cleaning device for printing plate cylinder recycling, comprising a machine table (1), and a middle positioning and clamping mechanism (2) is arranged in the middle of the machine table (1), characterized in that: The automatic cleaning device further includes: A driving mechanism (3) which is arranged on both sides of the middle positioning and clamping mechanism (2) on the machine table (1) and is used to drive the rotation and revolution of a plurality of brush discs (6); A propulsion mechanism (4) which is used to push the driving mechanism (3) and the brush discs (6) to move; A cleaning liquid spraying mechanism (5) which is used to spray cleaning liquid on both ends of the printing plate cylinder; A power-on and power-off structure (7) which is arranged on the positioning and clamping mechanism (2). When the printing plate cylinder is placed on the middle positioning and clamping mechanism (2), the device can be powered to avoid misoperation.

2. The automatic end ink cleaning device for the recycling of a printing plate cylinder according to claim 1, characterized in that: The driving mechanism (3), the propulsion mechanism (4), and the cleaning liquid spraying mechanism (5) are all controlled by a PLC control system. The PLC control system is preset with the propulsion distance parameters of the brush discs (6), and can automatically adjust the propulsion distance of the brush discs (6) according to different specifications of the printing plate cylinder, so that the brush discs (6) apply sufficient pressure to the ink layer to completely clean the ink paint.

3. The automatic end ink cleaning device for the recycling of printing plate cylinders according to claim 1, characterized in that: The middle positioning and clamping mechanism (2) includes an electro-hydraulic rod (201) fixed to the middle part of the inner top wall of the machine table (1). A pressing block (202) is installed on the transmission part of the electro-hydraulic rod (201), and a placement seat (203) is fixedly connected to the middle part of the inner bottom wall of the machine table (1).

4. An automatic end-ink cleaning device for the recycling of printing plate cylinders according to claim 1, characterized in that: The propulsion mechanism (4) includes a connecting shell A (401) fixed to both sides of the inner top wall of the machine table (1) with an open bottom. A lead screw (403) driven by a motor B (402) is installed inside the connecting shell A (401). A rod sleeve (404) is threadedly connected to the outer side wall of the lead screw (403), and the other end of the lead screw (403) connected to the motor B (402) is rotatably connected to the inner side wall of the connecting shell A (401) through a bearing. The bottom end of the rod sleeve (404) is connected to a moving part (406) through a vertical rod (405). A slide bar (408) is supported by a vertical plate (407) on the inner bottom wall of the machine table (1), and a slide sleeve (409) is slidably connected to the outer side wall of the slide bar (408). The top end of the slide sleeve (409) is fixed to the bottom end of the moving part (406).

5. An automatic end ink cleaning device for reclaiming a printing plate cylinder according to claim 4, characterized in that: The driving mechanism (3) includes a mounting plate (301) fixed to the surface of the moving part (406). A motor A (302) is installed in the middle of the surface of the mounting plate (301). A turntable (303) is installed on the transmission part of the motor A (302). A plurality of gears (304) are rotatably connected to the surface of the turntable (303) through bearings. Both the upper and lower sides of the surface of the mounting plate (301) are connected to an annular toothed plate (306) through cross bars (305). The outer side wall of the gear (304) is meshed with the inner side wall of the annular toothed plate (306), and the surface of the gear (304) is connected to the brush disc (6).

6. An automatic end-ink cleaning device for the recycling of printing plate cylinders according to claim 5, characterized in that: The cleaning liquid spraying mechanism (5) includes a connecting plate (501) fixed to the top of the annular toothed plate (306). A cleaning liquid tank (502) is installed on the surface of the connecting plate (501). A plurality of electric spray nozzles (503) are installed at the bottom end of the cleaning liquid tank (502).

7. An automatic end ink cleaning device for recycling printing plate rollers according to claim 5, characterized in that: The movable portion (406) is a connecting shell B (4061) fixed between the vertical rod (405) and the sliding sleeve (409) and opening toward the middle positioning clamping mechanism (2); the interior of the connecting shell B (4061) is slidably connected to an inner plate (4062); the surface of the inner plate (4062) is fixedly connected to a connecting rod (4063) extending from the connecting shell B (4061); the head of the connecting rod (4063) is fixedly connected to a front plate (4067) connected to the mounting plate (301); and a spring (4064) is installed between the inner surface of the connecting shell B (4061) and the inner plate (4062).

8. An automatic end ink cleaning device for the recycling of printing plate cylinders according to claim 7, characterized in that: The upper and lower sides of the connection shell B (4061) are fixedly connected to guide rails (4065), and the upper and lower sides of the inner plate (4062) are slidably connected to the guide rails (4065) via sliders (4066).

9. An automatic end-ink cleaning device for the recycling of printing plate cylinders according to claim 3, characterized in that: The power-on / off structure (7) comprises a groove (701) formed on the inner surface of the placement seat (203), a spring switch (702) for controlling the power switch of the device is installed inside the groove (701), and when the printing plate roller is placed in the placement seat (203), the spring switch (702) is squeezed and retracted into the groove (701), thereby turning on the power of the device.

10. A method for using the automatic end ink cleaning device for the recycled printing plate cylinder according to any one of claims 1-9, characterized in that: The steps include: Step 1: The operator places the printing plate roller to be cleaned horizontally on the placement seat (203) on the inner bottom wall of the machine table (1), ensuring that the printing plate roller is stably seated. The weight of the printing plate roller presses the spring switch (702) in the groove (701) of the placement seat (203), causing it to contract and turn on the main power supply of the device. The device is activated only after the printing plate roller is completely placed to avoid misoperation. The electric hydraulic rod (201) is controlled to move downward, driving the pressure block (202) to press the upper surface of the printing plate roller through the arc groove (701), and cooperates with the placement seat (203) to fix the printing plate roller, ensuring that there is no displacement during the cleaning process; Step 2: The PLC control system drives the motor B (402) to rotate according to the preset printing plate roller specification parameters, and drives the moving part (406) to translate through the screw rod (403)-rod sleeve (404), so that the brush plate (6) is pushed toward the end of the printing plate roller to the initial cleaning position. At the same time, the PLC starts the motor A (302), drives the rotating disk (303) to rotate, and causes the gear (304) to revolve around the axis of the printing plate roller. At the same time, due to the meshing with the fixed annular gear plate (306), the gear (304) rotates, and the brush plate (6) performs a planetary motion of "rotation + revolution" to form a spiral cleaning trajectory, covering the entire area of the end; Step 3: When the brush disk (6) approaches the end of the printing plate roller, the PLC controls the electric spray head (503) to open, and sprays cleaning liquid from the cleaning liquid tank (502) onto the contact area to soften the ink layer and cooperate with the mechanical friction of the bristles to peel off the residual paint. During the cleaning process, the propulsion mechanism (4) then feeds through the lead screw (403). The PLC combines the encoder of motor B (402) to monitor the displacement in real time and dynamically adjusts the propulsion speed to ensure that the brush disk (6) applies a constant pressure to the ink layer. In case of stubborn ink or local protrusions, the spring (4064) in the moving part (406) compresses for buffering and automatically adjusts the contact pressure; Step 4: After the cleaning is completed, motor B (402) rotates in reverse, the brush disk (6) retracts to the initial position, the electric spray head (503) stops spraying, and motor A (302) stops synchronously; Step 5: Control the piston rod of the electro-hydraulic rod (201) to retract, the pressure block (202) rises to release the printing plate roller, the operator removes the cleaned printing plate roller, the weight of the printing plate roller is removed from the placement seat (203), and the spring switch (702) automatically resets due to the elastic force of the high-elastic spring inside, disconnecting the power supply of the device.

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