A printing press blanket cylinder structure

Abstract

The utility model belongs to printing machine rubber roller technical field, concretely is a kind of printing machine rubber roller cylinder structure, including printing machine body, the top of printing machine body is provided with support, the inside rotation of support is connected with cylinder, the inside of cylinder is provided with cooling mechanism that carries out internal cooling to cylinder, the top of support is provided with cleaning mechanism that carries out the cleaning of the surface mesh of cylinder.The printing machine rubber roller cylinder structure, through the cooling gas pipe of rotation setting in the inside of cylinder and four groups annular jet nozzle, auxiliary air pipe with control valve and multiple groups of spray head mutual cooperation, cooling airflow forms uniform cooling air curtain in cavity, realizes the all-round, zoned accurate cooling of rubber roller body inner and outer wall;Simultaneously, low-temperature gas is continuously supplied using gas supply member, ensure that cylinder always maintains constant low temperature in high-speed printing process, effectively avoid that ink is dried in advance due to temperature is too high.

Description

Technical Field

[0001] This utility model relates to the field of printing press rubber roller technology, specifically a printing press rubber roller cylinder structure. Background Technology

[0002] In gravure printing, the ink transfer rate is usually between 50% and 80%. One-quarter to one-half of the ink always remains in the cells. When the ink residue rate in the cells of the printing plate cylinder increases, the ink transfer rate will decrease accordingly, causing plate clogging. This will result in shallow printing, unclear small characters and patterns, and light solid colors. In severe cases, it can cause broken strokes or missing strokes. One of the reasons for this is that the temperature of the printing plate rubber cylinder is too high and the solvent in the ink evaporates too quickly.

[0003] As disclosed in Chinese Patent Publication No. (CN219096213U), a printing press rubber roller cylinder structure includes a printing table. Support plates are fixedly connected to the upper left and upper right portions of the printing table. A motor is fixedly installed on the left end of the support plate on the left side. A rotating rod is fixedly connected to the output end of the motor. A cylinder mechanism is fixedly connected to the middle of the outer surface of the rotating rod. Several air vents are opened on the right side of the outer surface of the rotating rod. A mounting base is fixedly connected to the upper end of the support plate on the left side. A cool air blower is fixedly installed on the upper end of the mounting base. A connecting pipe is fixedly connected to the output end of the cool air blower. An air inlet mechanism is fixedly connected to the end of the connecting pipe away from the cool air blower. This printing press rubber roller cylinder structure allows cool air to be sent into the rubber roller body for cooling during operation, thereby lowering the temperature of the rubber roller body and improving printing quality.

[0004] However, although the above-mentioned technologies can achieve a certain degree of temperature reduction for the cylinder, the cooling effect is not ideal. They can only have a limited cooling effect on the local area of ​​the rubber roller and cannot achieve uniform and effective cooling of the whole. On the other hand, during the cooling process, it is impossible to adjust the temperature according to the actual temperature of different areas of the rubber roller, and there is a lack of effective cleaning and maintenance design for the equipment. The long-term accumulation of impurities will further weaken the cooling and printing performance, resulting in a significant reduction in printing quality. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a rubber roller cylinder structure for printing presses, which has advantages such as good cooling and cleaning effects. It solves the problems of existing technologies, which can only provide limited cooling to local areas of the rubber roller and cannot achieve uniform and effective cooling of the entire roller. On the other hand, during the cooling process, it is impossible to adjust the temperature according to the actual temperature of different areas of the rubber roller, and there is a lack of effective cleaning and maintenance design for the equipment.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a printing press rubber roller cylinder structure, including a printing press body, a support is provided on the top of the printing press body, a cylinder is rotatably connected inside the support, a cooling mechanism for internal cooling of the cylinder is provided inside the cylinder, and a cleaning mechanism for cleaning the mesh on the surface of the cylinder is provided on the top of the support.

[0007] The cooling mechanism includes a cooling air pipe rotatably disposed inside the cylinder, four sets of air nozzles connected to the outside of the cooling air pipe, four sets of auxiliary air pipes connected to the outside of the cooling air pipe, control valves connected to the outside of each of the four sets of auxiliary air pipes, and several sets of nozzles connected to the outside of each of the four sets of auxiliary air pipes. An air supply component is provided on the outside of the printing machine body.

[0008] Furthermore, the cylinder has an internal cavity, and the cooling air pipe is rotatably mounted in the cavity via a bearing. The right end of the cylinder has an air outlet, and a gap is provided between the cavity and the cooling air pipe to form a gas flow channel.

[0009] Furthermore, the four sets of jet nozzles are arranged in a ring on the outside of the cooling air pipe, and the length of the jet nozzles is equal to the depth of the cavity.

[0010] Furthermore, the four sets of auxiliary air pipes are arranged in a ring on the outside of the cooling air pipe, and each set of auxiliary air pipes is located between the opposite sides of each pair of adjacent sets of jet nozzles.

[0011] Furthermore, the air supply component includes an air pump fixedly connected to the outside of the printing press body, the air pump's inlet end being connected to a cooling air pipe, and the air pump's outlet end being fixedly connected to an air delivery pipe that is connected to the front end of the cooling air pipe.

[0012] Furthermore, the cleaning mechanism includes two sets of connecting plates fixedly mounted on the top of the bracket. A crossbeam is rotatably connected inside the two sets of connecting plates. Mounting grooves are provided on both the upper and lower sides of the crossbeam. A cleaning brush is embedded inside each of the two sets of mounting grooves. Connecting grooves are provided on the inner walls of the left and right sides of the mounting grooves. A spring is fixedly connected to the inner wall of the connecting groove away from the mounting groove. A pin is fixedly connected to the end of the spring away from the connecting groove. A lever is fixedly connected to the outer side of the pin.

[0013] Furthermore, the cleaning brush has insertion holes at both ends that are adapted to the shape of the pin, and the crossbeam has openings on both the upper and lower sides for the lever to slide.

[0014] Furthermore, both ends of the crossbeam are threaded, and the crossbeam is threaded with locking nuts through two sets of threads. Turntables are fixed to both ends of the crossbeam.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] 1. The rubber roller cylinder structure of this printing press utilizes a rotating cooling air pipe located inside the cylinder, along with four sets of annular jet nozzles, an auxiliary air pipe with a control valve, and multiple nozzles. This creates a uniform cooling air curtain within the cavity, achieving comprehensive and precise cooling of the inner and outer walls of the rubber roller. Simultaneously, a continuous supply of low-temperature gas ensures that the cylinder maintains a constant low temperature during high-speed printing, effectively preventing ink from drying prematurely due to excessive temperature. This significantly reduces the risks of plate clogging, ink splatter, and dot distortion, thereby improving overall printing quality and stability.

[0017] 2. The rubber roller cylinder structure of this printing press features a crossbeam rotatably mounted between two sets of connecting plates around a central axis. Double cleaning brushes, locked by springs and pins, are mirror-arranged on both sides of the crossbeam. When the lower cleaning brush becomes worn or accumulates dirt due to continuous friction on the cylinder surface, simply loosen the locking nut and rotate the crossbeam 180°. A new brush immediately falls into place and re-fits the mesh, while the old brush is simultaneously lifted to the non-working area. The entire replacement process requires no disassembly of the support or special tools and can be performed without stopping the machine. The continuous brushing action promptly removes residual ink and paper dust, preventing impurities from clogging the mesh, which can lead to decreased heat transfer efficiency and printing defects. This significantly extends the service life of the rubber roller while ensuring cooling performance, thus comprehensively improving printing quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the cooling mechanism of this utility model;

[0020] Figure 3 This is a partial schematic diagram of the cooling mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the cleaning mechanism of this utility model;

[0022] Figure 5 This utility model Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0023] In the diagram: 1. Printing press body; 2. Support frame; 3. Cylinder; 4. Cooling mechanism; 41. Cooling air pipe; 42. Air nozzle; 43. Auxiliary air pipe; 44. Control valve; 45. Nozzle; 46. Air supply component; 461. Air pump; 462. Cooling air pipe; 463. Air delivery pipe; 5. Cleaning mechanism; 51. Connecting plate; 52. Crossbeam; 53. Mounting slot; 54. Cleaning brush; 55. Connecting slot; 56. Spring; 57. Pin; 58. Lever; 59. Insertion hole; 510. Locking nut; 511. Turntable. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figure 1-5 The rubber roller cylinder structure of a printing machine in this embodiment includes a printing machine body 1, a support 2 is provided on the top of the printing machine body 1, a cylinder 3 is rotatably connected inside the support 2, a cooling mechanism 4 is provided inside the cylinder 3 to cool down the cylinder 3, and a cleaning mechanism 5 is provided on the top of the support 2 to clean the mesh on the surface of the cylinder 3.

[0026] In this embodiment, the cooling mechanism 4 includes a cooling air pipe 41 rotatably disposed inside the cylinder 3. Four sets of air nozzles 42 are connected to the outside of the cooling air pipe 41. Four sets of auxiliary air pipes 43 are connected to the outside of the cooling air pipe 41. A control valve 44 is connected to the outside of each of the four sets of auxiliary air pipes 43. Several sets of nozzles 45 are connected to the outside of each of the four sets of auxiliary air pipes 43. An air supply component 46 is disposed on the outside of the printing machine body 1.

[0027] In this embodiment, the interior of the cylinder 3 is provided with a cavity, and the cooling air pipe 41 is rotatably disposed in the cavity through a bearing. The right end of the cylinder 3 is provided with an air outlet, and a gap is provided between the cavity and the cooling air pipe 41 to form a gas flow channel.

[0028] In this embodiment, four sets of jet nozzles 42 are arranged in a ring on the outside of the cooling air pipe 41, and the length of the jet nozzles 42 is equal to the cavity depth.

[0029] In this embodiment, four sets of auxiliary air pipes 43 are arranged in a ring on the outside of the cooling air pipe 41, and each set of auxiliary air pipes 43 is located between the opposite sides of each pair of adjacent sets of jet nozzles 42.

[0030] Specifically, four sets of auxiliary air pipes 43 are located between adjacent main jet nozzles 42. Each auxiliary air pipe 43 is equipped with an electrically or manually controlled valve 44 and several fine nozzles 45. The system can independently adjust the opening of each control valve 44 according to the feedback of the temperature sensor or manual setting, so that the nozzles 45 in the corresponding area can spray cold air a second time at different flow rates and angles, thereby achieving precise compensation cooling of the hot spot area of ​​the cylinder 3.

[0031] In this embodiment, the air supply component 46 includes an air pump 461 fixedly connected to the outside of the printing machine body 1. The air inlet end of the air pump 461 is connected to a cold air pipe 462, and the air outlet end of the air pump 461 is fixedly connected to an air delivery pipe 463 connected to the front end of the cooling air pipe 41.

[0032] Specifically, the air pump 461 continuously draws in compressed air cooled by the external refrigeration unit from the cold air pipe 462, and sends it to the cooling air pipe 41 at a constant pressure through the air delivery pipe 463. The cooling air pipe 41 is arranged coaxially with the cylinder 3, and an annular gap is formed between them. The high-pressure cold air is first ejected at high speed radially through the four main jet nozzles 42 distributed in an annular pattern, forming the first axial spiral airflow in the cavity, which quickly carries away the heat from the inner wall of the cylinder 3.

[0033] Example 2: Please refer to Figure 1-5 Based on Embodiment 1, in order to clean the surface of the roller, the cleaning mechanism 5 in this embodiment includes two sets of connecting plates 51 fixedly installed on the top of the bracket 2. A crossbeam 52 is rotatably connected inside the two sets of connecting plates 51. Mounting grooves 53 are provided on both the upper and lower sides of the crossbeam 52. A cleaning brush 54 is embedded inside the two sets of mounting grooves 53. A connecting groove 55 is provided on the inner wall of the left and right sides of the mounting groove 53. A spring 56 is fixedly connected to the inner wall of the connecting groove 55 away from the mounting groove 53. A pin 57 is fixedly connected to the end of the spring 56 away from the connecting groove 55. A lever 58 is fixedly connected to the outer side of the pin 57.

[0034] Specifically, in the initial state, the cleaning brush 54 located in the lower mounting groove 53 always remains in elastic contact with the mesh on the surface of the cylinder 3 under the action of the spring 56. When the roller rotates, the brush bristles sweep off the attached ink and paper dust in real time.

[0035] In this embodiment, the cleaning brush 54 has insertion holes 59 at both ends that are adapted to the shape of the pin 57, and the crossbeam 52 has openings on both the upper and lower sides for the lever 58 to slide.

[0036] In this embodiment, both ends of the crossbeam 52 are threaded, and the crossbeam 52 is threaded with locking nuts 510 through two sets of threads. Both ends of the crossbeam 52 are fixed with turntables 511.

[0037] Specifically, when the cleaning effect decreases due to brush bristle wear or dirt accumulation, manual judgment can be made through the observation window or printing quality feedback; loosen the locking nut 510, rotate the turntable 511 to make the crossbeam 52 rotate 180° around its own axis, at which time the original spare cleaning brush 54 above falls to the working position and immediately fits into the cylinder 3, the original working brush is raised to the upper non-working area, move the lever 58, compress the spring 56 to make the pin 57 disengage from the insertion hole 59, and the old brush can be slid out along the opening; insert the new brush into the mounting slot 53, and after releasing, the pin 57 automatically springs back to lock, completing the toolless replacement, tighten the locking nut 510 to fix the crossbeam 52 again, and the cleaning mechanism 5 can resume continuous operation.

[0038] The working principle of the above embodiments is as follows:

[0039] (1) The air pump 461 continuously draws in compressed air cooled by the external refrigeration unit from the cold air pipe 462 and sends it into the cooling air pipe 41 through the air delivery pipe 463 at a constant pressure. The cooling air pipe 41 is arranged coaxially with the cylinder 3, and an annular gap is formed between them. The high-pressure cold air is first ejected radially at high speed through the four main jet nozzles 42 distributed in a ring, forming the first axial spiral airflow in the cavity, which quickly takes away the heat of the inner wall of the cylinder 3. The four sets of auxiliary air pipes 43 are located between the adjacent main jet nozzles 42. Each auxiliary air pipe 43 is equipped with an electrically or manually controlled valve 44 and several fine nozzles 45. The system can independently adjust the opening of each control valve 44 according to the feedback of the temperature sensor or manual setting, so that the nozzles 45 in the corresponding area can spray cold air twice at different flow rates and different angles, so as to achieve precise compensation cooling of the hot spot area of ​​the cylinder 3. The airflow after absorbing heat is discharged outside the machine through the air outlet at the right end of the cylinder 3, forming a continuous and directional gas flow cycle, ensuring that the roller is always in the optimal working temperature range during the high-speed printing process.

[0040] (2) The crossbeam 52 is mounted between the connecting plates 51 on the top of the bracket 2 via bearings. In the initial state, the cleaning brush 54 located in the lower mounting groove 53 is always elastically attached to the mesh on the surface of the cylinder 3 under the action of the spring 56. When the roller rotates, the brush bristles sweep off the attached ink and paper dust in real time. When the brush bristles are worn or dirt accumulates, the cleaning effect decreases. It can be judged manually through the observation window or printing quality feedback. Loosen the locking nut 510 and rotate the turntable 511 to make the crossbeam 52 rotate 180° around its own axis. At this time, the original upper spare cleaning brush 54 falls to the working position and immediately attaches to the cylinder 3. The original working brush is raised to the upper non-working area. Move the lever 58 and compress the spring 56 to make the pin 57 exit the insertion hole 59. The old brush can be slid out along the opening. Insert the new brush into the mounting groove 53. After releasing, the pin 57 automatically springs back and locks, completing the toolless replacement. Tighten the locking nut 510 to fix the crossbeam 52 again, and the cleaning mechanism 5 can resume continuous operation.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] If this patent discloses or relates to components or structural parts that are fixedly connected to each other, then unless otherwise stated, a fixed connection can be understood as: a fixed connection that can be detached (e.g., using bolts or screws), or a fixed connection that cannot be detached (e.g., riveting, welding). Of course, a fixed connection can also be replaced by an integral structure (e.g., manufactured by casting) (except where it is obviously impossible to use an integral forming process).

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A rubber roller cylinder structure for a printing press, comprising a printing press body (1), characterized in that: The top of the printing machine body (1) is provided with a bracket (2), and a cylinder (3) is rotatably connected inside the bracket (2). A cooling mechanism (4) is provided inside the cylinder (3) to cool down the cylinder (3). A cleaning mechanism (5) is provided on the top of the bracket (2) to clean the mesh on the surface of the cylinder (3). The cooling mechanism (4) includes a cooling air pipe (41) rotatably disposed inside the cylinder (3). Four sets of air nozzles (42) are connected to the outside of the cooling air pipe (41). Four sets of auxiliary air pipes (43) are connected to the outside of the cooling air pipe (41). A control valve (44) is connected to the outside of each of the four sets of auxiliary air pipes (43). Several sets of nozzles (45) are connected to the outside of each of the four sets of auxiliary air pipes (43). An air supply component (46) is provided on the outside of the printing machine body (1).

2. The rubber roller cylinder structure for a printing press according to claim 1, characterized in that: The cylinder (3) has an internal cavity, and the cooling air pipe (41) is rotatably installed in the cavity through a bearing. The right end of the cylinder (3) has an air outlet, and a gap is provided between the cavity and the cooling air pipe (41) to form a gas flow channel.

3. The rubber roller cylinder structure for a printing press according to claim 2, characterized in that: The four sets of jet nozzles (42) are arranged in a ring on the outside of the cooling air pipe (41), and the length of the jet nozzles (42) is equal to the depth of the cavity.

4. The rubber roller cylinder structure for a printing press according to claim 3, characterized in that: The four sets of auxiliary air pipes (43) are arranged in a ring on the outside of the cooling air pipe (41), and each set of auxiliary air pipes (43) is located between the opposite sides of each pair of adjacent sets of jet nozzles (42).

5. The rubber roller cylinder structure for a printing press according to claim 4, characterized in that: The air supply component (46) includes an air pump (461) fixedly connected to the outside of the printing press body (1). The air inlet end of the air pump (461) is connected to a cold air pipe (462), and the air outlet end of the air pump (461) is fixedly connected to an air delivery pipe (463) connected to the front end of the cooling air pipe (41).

6. The rubber roller cylinder structure for a printing press according to claim 1, characterized in that: The cleaning mechanism (5) includes two sets of connecting plates (51) fixedly installed on the top of the bracket (2). A crossbeam (52) is rotatably connected inside the two sets of connecting plates (51). Mounting slots (53) are provided on both the upper and lower sides of the crossbeam (52). A cleaning brush (54) is embedded inside the two sets of mounting slots (53). A connecting slot (55) is provided on the inner wall of the left and right sides of the mounting slot (53). A spring (56) is fixedly connected to the inner wall of the connecting slot (55) away from the mounting slot (53). A pin (57) is fixedly connected to the end of the spring (56) away from the connecting slot (55). A lever (58) is fixedly connected to the outer side of the pin (57).

7. The rubber roller cylinder structure for a printing press according to claim 6, characterized in that: The cleaning brush (54) has insertion holes (59) at both ends that are adapted to the shape of the pin (57), and the crossbeam (52) has openings on both the upper and lower sides for the lever (58) to slide.

8. The rubber roller cylinder structure for a printing press according to claim 7, characterized in that: Both ends of the crossbeam (52) are threaded, and the crossbeam (52) is threaded with locking nuts (510) through two sets of threads. Both ends of the crossbeam (52) are fixed with turntables (511).

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