A printing press pressure roller adjustment mechanism

Abstract

This utility model discloses a printing press pressure roller adjustment mechanism, relating to the field of printing press pressure roller technology. It includes a gravure printing press, a printing press partition, and an electric cylinder. The electric cylinder is connected to one side of the top of the printing press partition via a mounting base, and a base plate is fixedly connected to the bottom output end of the electric cylinder. An adjustment assembly is provided on the outer wall of the base plate, and the adjustment assembly includes a rack fixedly connected to the middle of the base plate. A gear is meshed with the outer wall of the rack, and a guide roller is connected to the center of the gear. A printing press roller fixing seat is connected to the bottom of the printing press partition, and a pressure roller is abutted to one side of the outer wall of the printing press roller fixing seat. An inking roller is connected to the side of the printing press partition near the printing press roller fixing seat. A rotating component is connected to the middle of the outer wall of the printing press roller fixing seat, and a sliding plate is connected to the middle of the rotating component. A positioning frame is slidably connected to the middle of the outer wall of the sliding plate, and a telescopic column is fixedly connected to its bottom end.

Description

Technical Field

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

[0002] The printing press pressure roller is a key component in printing machinery used to transmit pressure, squeeze the substrate, and assist in ink transfer. It is a roller that controls the paper's movement trajectory and applies printing pressure by squeezing against each other or pressing against a rigid roller, thereby transferring the ink on the printing plate or the image on the blanket to the paper surface. The printing press pressure roller adjustment mechanism refers to the mechanical or electrical control device used to adjust the relative position, contact pressure, and engagement / disengagement sequence between the pressure roller and the counter roller.

[0003] The adjustment of pressure rollers in existing printing presses is usually driven by a pneumatic cylinder swing mechanism. The pressure roller displacement control accuracy is poor, and tilting, slippage, and shaking are prone to occur during the lifting and lowering process. It is difficult to ensure that the roller surface is parallel to the plate roller throughout the entire process, which further aggravates the uneven printing pressure. Consequently, it is impossible to achieve micron-level precise positioning. The uneven gap between the pressure roller and the plate roller and the inking roller is prone to defects such as uneven ink color, ink streaks, ghosting, and misregistration, which seriously affect the quality of the printed product. Utility Model Content

[0004] The purpose of this invention is to provide a printing press roller adjustment mechanism to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a printing press pressure roller adjustment mechanism, comprising a gravure printing press, a printing press partition, and an electric cylinder. The gravure printing press includes a feeding and guiding system, a core printing unit, a power and transmission system, a drying and temperature control system, a winding and unloading system, and a printing press partition. An electric cylinder is connected to one side of the top of the partition via a mounting base, and a base plate is fixedly connected to the bottom output end of the electric cylinder. An adjustment component is provided on the outer wall of the base plate, and the adjustment component includes a rack fixedly connected to the middle of the base plate. A gear is meshed with the outer wall of the rack, and a guide roller is connected to the center of the gear. A printing roller fixing seat is connected to the bottom of the partition. A pressure roller is connected to one side of the outer wall of the printing roller fixing seat. An ink delivery roller is connected to the side of the printing press partition near the printing roller fixing seat. A rotating component is connected to the middle of the outer wall of the printing roller fixing seat. A sliding plate is connected to the middle of the rotating component. A positioning frame is slidably connected to the middle of the outer wall of the sliding plate. A telescopic column is fixedly connected to the bottom. The middle of the outer wall of the telescopic column and the positioning frame are both connected to the printing press partition. A support seat is connected to the side of the pressure roller away from the positioning frame. A pull-rope potentiometer is installed at the top of the support seat. The pull-rope potentiometer is connected to a hook through a pull rope. A slide rail is slidably connected inside the substrate. A pressure roller body is set between the two sets of substrates.

[0006] Preferably, the outer walls of the pressure roller body are fixedly connected to both sides of the extension portion, the center of the extension portion is inserted into the limit post, and a transmission seat is fixedly connected to one side of the outer wall of the limit post. A positioning seat is provided above the transmission seat, and the top side of the positioning seat is fixedly connected to the printing machine partition. The bottom end of the positioning seat is provided with an inclined surface, and the top of the transmission seat is provided with a guide inclined surface.

[0007] Preferably, the outer wall of the extension is slidably connected to a support member, the support member is semi-circular, and the support member is fixedly connected to the substrate.

[0008] Preferably, the slide rail is T-shaped, the extension is O-shaped, the outer wall of the slide rail is fixedly connected to the printing press partition, and the positioning seat is L-shaped.

[0009] Preferably, a spring is fixedly connected to the middle of the transmission seat, and one side of the outer wall of the spring is fixedly connected to the base plate, while the other side is fixedly connected to the transmission seat.

[0010] Preferably, the base plate, the transmission seat and the spring form an elastic telescopic mechanism, and the extension and the support are symmetrically distributed about the vertical center line of the pressure roller body.

[0011] Preferably, the transmission seat is connected to a positioning pin on the side near the spring, the positioning pin is slidably connected to the base plate, and the transmission seat and the limiting post are combined in an "L" shape.

[0012] Preferably, a base is connected to the middle of the outer wall of the pressure roller body, and the base is a rubber sleeve or an air guide groove. The rubber sleeve can be adapted to substrates of different thicknesses to avoid damage.

[0013] As can be seen from the above, the printing press roller adjustment mechanism provided by this utility model has the following beneficial effects.

[0014] By using an electric cylinder in conjunction with an adjustment component to replace the traditional pneumatic cylinder swing drive, precise adjustment of the position of the pressure roller body 7 and the printing roller is achieved, solving the problems of unstable pressure and large gap deviation of the pneumatic cylinder drive; and the guide structure of the slide rail, rack and pinion prevents the pressure roller body 7 from tilting or shaking during the movement, ensuring the parallelism between the roller surface and the ink roller.

[0015] By utilizing the inclined surfaces of the transmission seat and positioning seat, along with the resetting action of the spring, one-button unlocking and automatic locking of the pressure roller body are achieved without the need for additional tools, reducing the labor intensity of operators. Furthermore, the semi-circular support provides continuous support to the pressure roller body during the unlocking process, preventing equipment damage and personnel safety risks caused by the pressure roller body falling, thus improving operational safety. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the gravure printing machine of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the electric cylinder of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the positioning frame of this utility model;

[0019] Figure 4 This is a side view of the electric cylinder, rack, and gear of this utility model.

[0020] Figure 5 This is a three-dimensional structural diagram of the support base, pull-rope potentiometer, and hook of this utility model;

[0021] Figure 6 This is a schematic diagram of the main structure of the skateboard and positioning frame of this utility model;

[0022] Figure 7 This is a three-dimensional structural diagram of the rack and gear of this utility model;

[0023] Figure 8 This is a three-dimensional structural diagram of the pressure roller body, extension, and base of this utility model;

[0024] Figure 9 This is a side view sectional view of the substrate and pressure roller of this utility model;

[0025] Figure 10 This is a three-dimensional structural diagram of the substrate, base, and limiting post of this utility model;

[0026] Figure 11 This is a three-dimensional structural diagram of the transmission seat, spring, and positioning seat of this utility model.

[0027] In the diagram: 1. Gravure printing machine; 2. Printing machine partition; 3. Electric cylinder; 4. Base plate; 5. Adjustment assembly; 501. Rack; 502. Gear; 503. Ink roller; 504. Plate roller fixing seat; 505. Rotating component; 506. Slide plate; 507. Positioning frame; 508. Telescopic column; 509. Support seat; 510. Pull-cord potentiometer; 511. Hook; 6. Slide rail; 7. Pressure roller body; 8. Extension; 9. Base; 10. Limiting column; 11. Support component; 12. Transmission seat; 13. Spring; 14. Positioning seat; 15. Angled part; 16. Guide angled surface. Detailed Implementation

[0028] 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.

[0029] Please see Figures 1-11 This utility model provides a technical solution: a printing press pressure roller adjustment mechanism, including a gravure printing press 1, a printing press partition 2, and an electric cylinder 3. The gravure printing press 1 includes a feeding and guiding system, a core printing unit, a power and transmission system, a drying and temperature control system, and a winding and unloading system. The printing press partition 2 has an electric cylinder 3 connected to one side of its top via a mounting base, and a base plate 4 is fixedly connected to the bottom output end of the electric cylinder 3. An adjustment component 5 is provided on the outer wall of the base plate 4, and the adjustment component 5 includes a rack 501 fixedly connected to the middle of the base plate 4. A gear 502 is meshed with the outer wall of the rack 501, and a guide roller is connected to the center of the gear 502. A plate roller fixing seat 504 is connected to the bottom end of the printing press partition 2. 4. A pressure roller is connected to one side of the outer wall. An ink delivery roller 503 is connected to the side of the printing press partition 2 near the plate roller fixing seat 504. A rotating part 505 is connected to the middle of the outer wall of the plate roller fixing seat 504. A sliding plate 506 is connected to the middle of the rotating part 505. A positioning frame 507 is slidably connected to the middle of the outer wall of the sliding plate 506. A telescopic column 508 is fixedly connected to the bottom end. The middle of the outer wall of the telescopic column 508 and the positioning frame 507 are both connected to the printing press partition 2. A support seat 509 is connected to the side of the pressure roller away from the positioning frame 507. A pull rope potentiometer 510 is installed at the top of the support seat 509. The pull rope potentiometer 510 is connected to a hook 511 through a pull rope. A slide rail 6 is slidably connected inside the substrate 4. A pressure roller body 7 is set between the two sets of substrates 4.

[0030] The outer walls of the pressure roller body 7 are fixedly connected to both sides of the extension portion 8. A limit post 10 is inserted into the center of the extension portion 8, and a transmission seat 12 is fixedly connected to one side of the outer wall of the limit post 10. A positioning seat 14 is provided above the transmission seat 12, and one side of the top of the positioning seat 14 is fixedly connected to the printing machine partition 2. The bottom end of the positioning seat 14 has an inclined surface 15, and the top of the transmission seat 12 has a guide inclined surface 16. A support member 11 is slidably connected to the outer wall of the extension portion 8. The support member 11 is semi-circular and fixedly connected to the base plate 4. The slide rail 6 is "T" shaped, and the extension portion 8 is "O" shaped. The outer wall of the slide rail 6 is fixedly connected to the printing machine partition 2. The positioning seat 14 It is L-shaped; a spring 13 is fixedly connected to the middle of the transmission seat 12, and one side of the outer wall of the spring 13 is fixedly connected to the base plate 4, and the other side is fixedly connected to the transmission seat 12; the base plate 4, the transmission seat 12 and the spring 13 form an elastic telescopic mechanism, and the extension part 8 and the support member 11 are symmetrically distributed about the vertical center line of the pressure roller body 7; a positioning pin is connected to the side of the transmission seat 12 near the spring 13, and the positioning pin is slidably connected to the base plate 4. The transmission seat 12 and the limiting post 10 are combined to form an L-shape; a base 9 is connected to the middle of the outer wall of the pressure roller body 7, and the base 9 is a rubber sleeve or an air guide groove. The rubber sleeve can be adapted to substrates of different thicknesses to avoid pressure damage.

[0031] For specific implementation, please refer to Figure 1 After the operator completes the unwinding of the substrate roll at the left unwinding station of the gravure printing machine 1, the equipment starts automatically. The substrate is introduced through the guide roller group, and the edge position control system of the EPC monitors the edge position of the substrate in real time and automatically performs correction compensation to ensure that the substrate enters the printing station with a constant posture and without deviation. The substrate passes around the central large impression cylinder and enters the K1, K2, K3, etc. multi-color printing units in sequence at a stable linear speed under the constant tension drive of the traction roller group. Each printing unit independently completes the ink supply-transfer process: the anilox roller quantitatively transfers ink to the printing plate cylinder. After the printing plate cylinder is inked, the ink is transferred to the substrate under the pressure of the pressure roller body 7. After each color printing is completed, the substrate immediately enters the drying unit of the corresponding color group to achieve rapid ink curing and avoid color bleeding and smudging. After the full-color printing is completed, the substrate is transported to the right rewinding station by the traction system to complete the winding of the finished roll.

[0032] See Figure 2 , Figure 3 and Figure 4 This solution activates the electric cylinder 3 at the top of the printing press partition 2. Its telescopic motion drives the base plate 4 to move linearly vertically along the slide rail 6. The movement of the base plate 4 causes the rack 501 and the pressure roller body 7 to move synchronously. At the same time, the rack 501 and gear 502 mechanism convert the linear reciprocating motion of the electric cylinder 3 into rotational motion, and then into precise linear lifting and lowering of the pressure roller assembly. At this time, the slide rail 6 and the slider are responsible for supporting and limiting the movement trajectory, while the rack 501 and gear 502 are responsible for precisely controlling the movement distance and speed, ensuring the stability and straightness of the pressure roller body 7. By vertically driving the pressure roller body 7 with the electric cylinder 3, and cooperating with the pull rope potential sensor to collect the pressure roller displacement signal in real time throughout the process, the closed-loop control of the electric cylinder 3 is used to dynamically compensate for the pressure roller position, ensuring constant pressure when printing substrates of different batches and thicknesses, avoiding gap deviation, and achieving micron-level precise adjustment of the pressure roller body 7 position. This effectively shortens the changeover and debugging time and reduces substrate loss.

[0033] See Figure 5 and Figure 6 The operator can activate the rotating component 505 to drive the printing roller fixing seat 504 to rotate, and the rotation of the printing roller fixing seat 504 will drive the printing roller to rotate synchronously. Then, the telescopic column 508 will be activated to drive the sliding plate 506 to move horizontally along the positioning frame 507, thereby driving the printing roller to move horizontally. At the same time, the movement of the printing roller will cause the hook 511 to drive the pull rope to move. With the help of the pull rope potentiometer 510 on the top of the support seat 509, the displacement will be fed back in real time, and the position of the printing roller will be precisely adjusted, thereby achieving precise adjustment of the vertical direction of the pressure roller body 7 and the horizontal direction of the printing roller.

[0034] When the pressure roller body 7 needs to be disassembled, the base plate 4 drives the transmission seat 12 to move vertically upward and close to the positioning seat 14 until the guide slope 16 at the top of the transmission seat 12 and the slope 15 at the bottom of the positioning seat 14 come into contact; the positioning seat 14 remains fixed, and the transmission seat 12 drives the limiting post 10 to move away from the pressure roller body 7 under the guidance of the slope, while stretching the spring 13 until the limiting post 10 completely disengages from the extension 8 of the pressure roller body 7, releasing the axial and radial locking of the pressure roller body 7;

[0035] After the lock is released, the semi-circular support 11 supports and limits the pressure roller body 7, preventing the pressure roller body 7 from falling accidentally; the operator can directly lift the pressure roller body 7 upward to complete the quick disassembly of the pressure roller body 7.

[0036] When installing the pressure roller body 7, first position the extensions 8 at both ends of the pressure roller body 7 against the supporting surface of the support member 11. Then, the base plate 4 drives the transmission seat 12 to move vertically downward, causing the transmission seat 12 to disengage from the positioning seat 14. Under the action of the elastic restoring force, the spring 13 drives the limiting post 10 to reset and insert into the extension 8 of the pressure roller body 7, thus completing the automatic locking of the pressure roller body 7. The operator can apply a lubricating medium to the supporting surface of the support member 11 to reduce the frictional resistance between the support member 11 and the extension 8, thereby improving the ease of disassembly and assembly.

[0037] To meet the process requirements of different printing orders, different models of pressure roller bodies 7 can be quickly replaced to achieve multi-scenario adaptation;

[0038] When the outer wall of the pressure roller body 7 is a hard smooth surface structure, it has the characteristics of uniform pressure distribution, excellent wear resistance and long service life, and is suitable for high-speed printing conditions.

[0039] When the outer wall base 9 of the pressure roller body 7 is a soft rubber sleeve structure, it can provide elastic buffer compensation, adapt to printing substrates of different thicknesses, avoid substrate damage, and ensure full ink transfer.

[0040] When the outer wall base 9 of the pressure roller body 7 is an air guide groove structure, it is suitable for vacuum adsorption printing process, which can effectively remove the air between the substrate and the roller surface, avoid bubbles and wrinkles, and is suitable for printing on thin soft film, self-adhesive and other easily deformable substrates.

[0041] This solution uses an electric cylinder 3 in conjunction with an adjustment component 5 to replace the traditional pneumatic cylinder swing drive, achieving precise adjustment of the position of the pressure roller body 7 and the printing roller, solving the problems of unstable pressure and large gap deviation of the pneumatic cylinder drive; and the guiding structure of the slide rail 6, rack 501, and gear 502 avoids the skewing and shaking of the pressure roller body 7 during the movement process, ensuring the parallelism between the roller surface and the ink roller.

[0042] Through the inclined surface cooperation of the transmission seat 12 and the positioning seat 14 and the reset action of the spring 13, the pressure roller body 7 can be unlocked and automatically locked with one click without the need for additional tools, reducing the labor intensity of operators; and the semi-circular support 11 provides continuous support to the pressure roller body 7 during the unlocking process, preventing the pressure roller body 7 from falling and causing equipment damage and personnel safety risks, thus improving operational safety.

[0043] For different printing processes, the pressure roller body 7 can be quickly replaced with three structures: hard gloss, soft coating, and air guide groove, covering all types of substrates such as ordinary paper, thick cardboard, thin soft film, and self-adhesive labels, so that one machine can adapt to multiple production scenarios.

[0044] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A printing press roller adjustment mechanism, comprising a gravure printing press (1), a printing press partition (2), and an electric cylinder (3), wherein the gravure printing press (1) includes a feeding and guiding system, a core printing unit, a power and transmission system, a drying and temperature control system, a winding and unloading system, and the printing press partition (2), characterized in that: The printing press partition (2) has an electric cylinder (3) connected to one side of its top end via a mounting base. A base plate (4) is fixedly connected to the bottom output end of the electric cylinder (3). An adjustment assembly (5) is provided on the outer wall of the base plate (4). The adjustment assembly (5) includes a rack (501) fixedly connected to the middle of the base plate (4). A gear (502) meshes with the outer wall of the rack (501). A guide roller is connected to the center of the gear (502). A printing roller fixing seat (504) is connected to the bottom end of the printing press partition (2). A pressure roller is abutted to one side of the outer wall of the printing roller fixing seat (504). An ink delivery roller (503) is connected to the side of the printing press partition (2) closest to the printing roller fixing seat (504). A rotating part (505) is connected to the middle of the outer wall, and a sliding plate (506) is connected to the middle of the rotating part (505). A positioning frame (507) is slidably connected to the middle of the outer wall of the sliding plate (506), and a telescopic column (508) is fixedly connected to the bottom end. The telescopic column (508) and the middle of the outer wall of the positioning frame (507) are both connected to the printing press partition (2). A support base (509) is connected to the side of the pressure roller away from the positioning frame (507), and a pull rope potentiometer (510) is installed at the top of the support base (509). The pull rope potentiometer (510) is connected to a hook (511) through a pull rope. A slide rail (6) is slidably connected inside the substrate (4), and a pressure roller body (7) is provided between the two sets of substrates (4).

2. The printing press pressure roller adjusting mechanism according to claim 1, characterized in that: The outer walls of the pressure roller body (7) are fixedly connected to extensions (8), and a limiting post (10) is inserted into the center of the extension (8). A transmission seat (12) is fixedly connected to one side of the outer wall of the limiting post (10). A positioning seat (14) is provided above the transmission seat (12), and the top side of the positioning seat (14) is fixedly connected to the printing press partition (2). The bottom end of the positioning seat (14) is provided with a sloping surface (15), and the top of the transmission seat (12) is provided with a guide sloping surface (16).

3. The printing press pressure roller adjusting mechanism according to claim 2, characterized in that: The extension (8) has a support member (11) slidably connected to its outer wall, and the support member (11) is semi-circular and fixedly connected to the substrate (4).

4. The printing press pressure roller adjusting mechanism according to claim 3, characterized in that: The slide rail (6) is T-shaped, the extension (8) is O-shaped, the outer wall of the slide rail (6) is fixedly connected to the printing press partition (2), and the positioning seat (14) is L-shaped.

5. The printing press pressure roller adjusting mechanism according to claim 4, characterized in that: A spring (13) is fixedly connected to the middle of the transmission seat (12), and one side of the outer wall of the spring (13) is fixedly connected to the base plate (4), and the other side is fixedly connected to the transmission seat (12).

6. The printing press pressure roller adjusting mechanism according to claim 5, characterized in that: The base plate (4), the transmission seat (12) and the spring (13) form an elastic telescopic mechanism, and the extension (8) and the support member (11) are symmetrically distributed about the vertical center line of the pressure roller body (7).

7. The printing press pressure roller adjusting mechanism according to claim 6, characterized in that: The transmission seat (12) is connected to a positioning pin on the side near the spring (13). The positioning pin is slidably connected to the base plate (4). The transmission seat (12) and the limiting post (10) are combined in an "L" shape.

8. The printing press pressure roller adjusting mechanism according to claim 7, characterized in that: The pressure roller body (7) has a base (9) connected to the middle of its outer wall. The base (9) is a rubber sleeve or an air guide groove. The rubber sleeve can be adapted to printing substrates of different thicknesses to avoid damage.

Images