Scraper adjusting mechanism for accurate coloring in intaglio printing

Abstract

The utility model discloses a scraper adjusting mechanism for accurate coloring of intaglio printing. The scraper adjusting mechanism comprises two side plates, a mounting box body and a scraper assembly. The mounting box body is in guide fit with the side plate guide sleeves through guide rods on two sides, the guide rod on one side is connected with a spring disc and a compression spring, and the guide rod on the other side realizes transverse position adjustment through an eccentric shaft driven by a motor and a hinged connecting rod; a vertical guide sleeve and a lifting rod are arranged on the mounting box body, the lifting rod is meshed with a gear through a vertical rack, and a rotating rod is driven by a turbine worm-worm transmission adjusting assembly, so that the height of the lifting rod is adjusted, and the accurate adjustment of the height of the scraper assembly is realized. According to the mechanism, a complex lifting guide rail is omitted, the structure is simplified, printing and coloring precision is ensured by independently adjusting the left-right position and height of the scraper, and the mechanism has the advantages of being convenient to adjust, high in precision and low in cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to a doctor blade mounting component on a gravure printing machine, in particular to a doctor blade adjusting mechanism for precise color printing of gravure printing. BACKGROUND

[0002] In the gravure printing process, the doctor blade as a key functional component, its installation position (including left and right horizontal position, vertical height) and contact angle with the printing plate (usually indirectly regulated through height) directly affect the uniformity and accuracy of ink transfer, and further determine the color consistency, pattern clarity and overall quality of the printed matter. Specifically, the doctor blade needs to precisely control the gap with the printing cylinder surface: too small gap may cause excessive wear of the doctor blade or damage the printing plate; too large gap cannot completely remove the excess ink in the non-text area, causing problems such as plate blurring, uneven color or missing printing on the printed matter; at the same time, the left and right positions of the doctor blade need to be accurately aligned with the text area of the printing plate to ensure that the ink is only deposited in the target pattern area.

[0003] Typical structure and defects in the prior art

[0004] In the prior art, the doctor blade adjusting mechanism for precise color printing of gravure printing usually adopts a complex mechanical structure with multiple components linked to realize multi-dimensional adjustment function. For example, the patent with publication number CN 219856378 U (hereinafter referred to as "comparative document") mainly includes the following core components:

[0005] Lifting and left-right adjusting components: the vertical lifting of the doctor blade as a whole is realized through the lifting seat between the two mounting plates, the lifting seat side wall is slidingly installed on the lifting guide rail, the vertical tooth plate on the side of the guide rail is engaged with the gear inside the lifting seat, the gear is driven by the adjusting shaft, the adjusting shaft is linked with the hand wheel through the worm gear, so that the up-down position adjustment of the doctor blade is realized by rotating the hand wheel; at the same time, an eccentric wheel driven by a motor is installed on one of the mounting plates, the eccentric wheel is embedded in the annular slot of the guide rod, and the left-right fine adjustment of the lifting seat is realized by rotating the eccentric wheel driven by the motor.

[0006] Angle and telescopic adjusting components: a detachable swing seat is installed on the lifting seat, the knife seat is installed on the detachable swing seat through the telescopic adjusting mechanism (the guide block in the guide groove cooperates with the screw), the swing seat is driven to rotate by the swing cylinder to coarsely adjust the angle of the doctor blade (about 50°), and the angle is precisely controlled by the micro-adjustment of the rotating shaft through the worm gear adjuster; in addition, the doctor blade is fixed by the doctor blade mounting plate and the "L" shaped retaining plate at the front end of the knife seat, and the contact degree of the doctor blade is ensured by the pressing plate.

[0007] Specific problems of the prior art

[0008] Although the comparison file achieves multi-dimensional adjustment of the scraper (up and down, left and right, angle, extension and retraction) through a multi-stage transmission structure, it has the following significant drawbacks:

[0009] The structure is too complex: it includes a variety of transmission components such as lifting guide rails, toothed plates, gears, worm gears (at least two sets), eccentric wheels, swing cylinders, telescopic guide grooves and screws. Each component needs to be precisely matched to achieve the expected function. Not only is the assembly difficult (requiring professional debugging) and the maintenance cost high (any component failure requires overall troubleshooting), but the cumulative error of multi-stage transmission can easily cause the actual position of the doctor blade to deviate from the adjustment target, affecting the printing accuracy.

[0010] Limited adjustment efficiency and precision: Multi-component linkage adjustment requires step-by-step operation (such as adjusting the height first, then the left and right, and finally the angle), and some adjustments rely on manual handwheels (such as worm gears) or coarse motor adjustments (such as eccentric wheels), making it difficult to achieve fast and precise linkage control; in particular, the fine adjustment of the scraper angle and height relies on multi-stage worm gears, which is cumbersome to operate and requires a high level of operator experience.

[0011] Redundancy in size and weight: The complex guide rails, toothed plates and multi-stage transmission components increase the size and weight of the entire adjustment mechanism, which is not conducive to the compact design of the printing press, and also increases the energy consumption and mechanical wear of the equipment. Utility Model Content

[0012] This utility model aims to solve the technical problems of complex structure and insufficient adjustment accuracy of existing gravure printing squeegee adjustment mechanisms. It provides a simple, precise, and easy-to-operate squeegee adjustment mechanism for precise coloring in gravure printing. By optimizing the mechanical transmission structure and reducing redundant parts, it achieves precise and independent adjustment of the squeegee's left and right positions and height, ensuring the accuracy of printing coloring.

[0013] To achieve the above objectives, this utility model provides the following technical solution: a squeegee adjustment mechanism for precise coloring in gravure printing, comprising two side plates, a mounting box, and a squeegee assembly; the mounting box is disposed at the interval between the two side plates, and a handwheel is provided on the mounting box, which drives the squeegee assembly to be adjusted up and down along the height direction of the mounting box; two symmetrical vertical guide sleeves are provided on the mounting box, and a lifting rod is installed inside the vertical guide sleeve, with a shaft seat connected to the upper end of the lifting rod; a vertical rack is provided on the peripheral wall of the lifting rod, and a through hole is opened on the peripheral wall of the vertical guide sleeve corresponding to the rack direction; a rotating rod is provided inside the mounting box, and a gear that meshes with the rack is disposed on the rotating rod, the gear passing through the through hole and meshing with the rack; an adjustment assembly for driving the rotating rod to rotate is also provided on the mounting box, the adjustment assembly comprising a turbine rotatably installed inside the mounting box, and a rotatable worm gear disposed inside the mounting box, the worm gear being driven by the turbine, one end of the worm gear extending out of the mounting box and disposed on the handwheel.

[0014] Two side plates are respectively provided with guide sleeves, two sides of the installation box are respectively provided with guide rods, the guide rods pass through the corresponding guide sleeves and are guided matched with the guide sleeves, one side of the guide rods is connected with spring plates after passing through the guide sleeves, compression springs are arranged between the spring plates and the end faces of the guide sleeves, the guide rods on the other side are controlled by driving components to adjust the lateral positions, the driving components are fixed on the side plates and include motors and eccentric shafts arranged on the output ends of the motors, the side guide rods are in transmission connection with the eccentric shafts through hinged connecting rods.

[0015] In the driving component, the motor drives the eccentric shaft to rotate, and the eccentric shaft drives the guide rod to move laterally through the hinged connecting rod.

[0016] In the adjusting assembly, the worm gear is in transmission cooperation with the turbine, the worm gear drives the turbine to rotate when rotating, the turbine drives the rotating rod to rotate, and the gear on the rotating rod is in mesh with the rack of the lifting rod, so that the lifting rod is vertically lifted.

[0017] Advantages: compared with the prior art, the utility model has the following advantages:

[0018] 1. simple structure: cancel the traditional complex lifting guide rail, tooth plate and multi-stage worm gear linkage system, only through guide rod-guide sleeve guide, motor-eccentric shaft drive lateral adjustment, and worm gear-gear and rack drive height adjustment, significantly reduce the number of parts, reduce the assembly difficulty and maintenance cost.

[0019] 2. accurate adjustment: the motor drives the eccentric shaft to realize stable adjustment of the lateral position through the connecting rod, and the self-locking characteristic of the worm gear is matched with the gear and rack transmission to ensure the accuracy of the height adjustment, avoid cumulative error, and meet the high-precision requirement of the scraper position of the intaglio printing.

[0020] 3. convenient operation: the lateral adjustment is automatically controlled through the motor drive, the height adjustment is manually and finely adjusted through the hand wheel, the efficiency and accuracy are considered, and the needs of different printing scenes are adapted.

[0021] 4. high coloring accuracy: the left and right positions and the height of the scraper are independently and accurately adjusted, the contact state of the scraper and the printing plate is ensured to be optimal, the uniformity of ink transfer is improved, and the accurate coloring of the printed matter is realized.

[0022] The utility model will be further described below in combination with the drawings and specific embodiments. DRAWINGS

[0023] Figure 1 It is a perspective view of the specific embodiment of the utility model;

[0024] Figure 2 It is a sectional view of the specific embodiment of the utility model.

[0025] Figure 3 This is an internal structural diagram of a specific embodiment of the present utility model;

[0026] Figure 4 This is a partial structural diagram of a specific embodiment of the present utility model.

[0027] Explanation of reference numerals in the attached drawings: 1. Side plate; 2. Mounting housing; 3. Guide rod; 4. Guide sleeve; 5. Spring disc; 6. Compression spring; 7. Motor; 8. Eccentric shaft; 9. Hinge connecting rod; 10. Lifting rod; 11. Shaft seat; 13. Rack; 14. Rotating rod; 15. Gear; 16. Turbine; 17. Worm gear; 18. Handwheel; 19. Vertical guide sleeve. Detailed Implementation

[0028] The following detailed description of the squeegee adjustment mechanism for precise color application in gravure printing provided by this utility model, with reference to specific embodiments, will fully demonstrate its structural composition, connection relationships, and working principle. This embodiment is a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto.

[0029] like Figure 1 , Figure 2 As shown, the overall structural layout

[0030] The squeegee adjustment mechanism for precise color application in gravure printing in this embodiment mainly consists of three parts: two side plates 1, a mounting box 2, and a squeegee assembly. The two side plates 1 are parallel and spaced support plates, used to provide the installation reference and lateral support for the overall structure; the mounting box 2 is fixed in the spaced area between the two side plates 1, serving as the transmission carrier for lateral movement and vertical lifting; the squeegee assembly is the component that ultimately performs the printing ink scraping function, and is connected to the lifting rod 10 through the bearing 11 to achieve precise positioning after position adjustment.

[0031] like Figure 3 , Figure 4 As shown, the detailed structure and connection relationship of key components

[0032] 1. Lateral adjustment structure for left-right back-and-forth movement adjustment:

[0033] Guide sleeves 4 are installed on each of the two side plates 1, and the guide sleeves 4 are fixed in a preset position on the side plates 1. A guide rod 3 is arranged on each side of the mounting box 2, and the two ends of the guide rod 3 are fixedly connected to the side wall of the mounting box 2. Each guide rod 3 passes through the guide sleeve 4 on the corresponding side and forms a sliding fit with the inner wall of the guide sleeve 4.

[0034] in:

[0035] Spring compression side: the guide rod 3 on one side of the installation box 2 is fixedly connected with a spring disc 5 after passing through a guide sleeve 4, the guide sleeve 4 is arranged on the side plate, a compression spring 6 is arranged between the spring disc 5 and the end face of the guide sleeve 4, the compression spring 6 is clamped between the spring disc 5 and the end face of the vertical guide sleeve 19, and the compression spring 6 provides compression force when the guide rod 3 moves transversely.

[0036] Drive adjustment side: the guide rod 3 on the other side of the installation box 2 passes through the guide sleeve 4 and is connected with a driving component through a hinged connecting rod 9. The driving component is fixed on the side plate 1 and includes a motor 7 and an eccentric shaft 8 fixed on the output end of the motor 7. The motor 7 is a power source for outputting rotary motion, the output end of the motor 7 is fixedly connected with the eccentric shaft 8, the axis of the eccentric shaft 8 is parallel to but offset from the axis of the output end of the motor 7. The two ends of the hinged connecting rod 9 are hingedly connected with the eccentric shaft 8 and the end of the guide rod 3 on the side, respectively. When the motor 7 drives the eccentric shaft 8 to rotate, the eccentric shaft 8 drives the guide rod 3 to move transversely through the hinged connecting rod 9, and in turn drives the installation box 2 and the scraper assembly to move transversely, so as to realize the transverse position adjustment of the scraper assembly.

[0037] 2. Vertical lifting adjustment structure height adjustment:

[0038] Two symmetrical vertical guide sleeves 19 are arranged on the installation box 2, and a lifting rod 10 is arranged in the vertical guide sleeve 19. The upper end of the lifting rod 10 is fixedly connected with a shaft seat 11, and the scraper assembly is arranged on the shaft seat 11 through a shaft. A vertical rack 13 is arranged on the peripheral wall of the lifting rod 10, and a through hole is arranged on the peripheral wall of the vertical guide sleeve 19 corresponding to the direction of the rack 13.

[0039] A rotating rod 14 is arranged in the installation box 2, and a gear 15 engaged with the rack 13 is arranged on the rotating rod 14. An adjusting assembly for driving the rotating rod 14 to rotate is further arranged on the installation box 2, the adjusting assembly includes a turbine 16 rotatably arranged in the installation box 2, a worm 17 rotatably arranged in the installation box 2, the worm 17 is in transmission cooperation with the turbine 16, and one end of the worm 17 penetrates out of the installation box 2 and is provided with a hand wheel 18.

[0040] When the hand wheel 18 is rotated, the worm 17 is rotated and drives the turbine 16 to rotate, the turbine 16 drives the rotating rod 14 to rotate, the gear 15 on the rotating rod 14 is engaged with the rack 13 of the lifting rod 10, and the lifting rod 10 is vertically lifted along the vertical guide sleeve 19, so as to adjust the height of the scraper assembly.

[0041] 3. Working process of each component:

[0042] Left and right reciprocating motion adjustment: motor 7 drives eccentric shaft 8 to rotate, eccentric shaft 8 pushes guide rod 3 to do transverse left and right reciprocating motion through hinged connecting rod 9, guide rod 3 drives mounting box 2 and scraper assembly to move synchronously, realizing reciprocating position adjustment of scraper assembly in left and right directions. Spring disc 5 and compression spring 6 provide compression when guide rod 3 moves.

[0043] Height adjustment: operator rotates hand wheel 18, hand wheel 18 drives worm 17 to rotate, worm 17 drives rotating rod 14 to rotate through turbine 16, gear 15 on rotating rod 14 meshes with rack 13 of lifting rod 10, making lifting rod 10 vertically ascend and descend, and then adjusting the height of scraper assembly. The self-locking property of turbine 16 and worm 17 ensures the height position of scraper assembly fixed.

[0044] 4. Working principle summary:

[0045] Cancel the traditional lifting guide rail, toothed plate and multi-stage worm gear linkage system, realize transverse guidance through the sliding fit of guide rod 3 and vertical guide sleeve 19, realize left and right reciprocating motion adjustment of scraper assembly through eccentric shaft 8 driven by motor 7 and hinged connecting rod 9; through the transmission system composed of turbine 16, worm 17, rotating rod 14 and gear 15, the rotary motion of hand wheel 18 is converted into the vertical ascending and descending motion of lifting rod 10, realizing the precise manual adjustment of the height of scraper assembly. Both sides plate 1 as the overall support structure, mounting box 2 integrates the transmission components of transverse and vertical lifting, scraper assembly is connected with lifting rod 10 through shaft seat 11, and each component works cooperatively, so as to simplify the structure while ensuring that the left and right directions of scraper assembly can be reciprocally adjusted and the height can be precisely adjusted, meeting the demand of precise color printing of intaglio printing.

Claims

1. A doctor blade adjustment mechanism for precision color registration in intaglio printing, characterized by, The utility model relates to a kind of vertical lifting mechanism of scraper, including two side plates (1), installation box (2) and scraper assembly;The installation box (2) is arranged at the interval between two side plates (1), and hand wheel (18) is configured on installation box (2), hand wheel (18) drives scraper assembly to adjust along the height direction of installation box (2) and is lifted, two symmetrical vertical guide sleeves (19) are provided on the installation box (2), and lifting rod (10) is installed in vertical guide sleeve (19), and the upper end of lifting rod (10) is connected with shaft seat (11);Vertical rack (13) is equipped on the peripheral wall of lifting rod (10), and the peripheral wall of vertical guide sleeve (19) is opened with perforation corresponding to the direction of rack (13);Rotating rod (14) is provided in installation box (2), gear (15) is configured on rotating rod (14) and is engaged with rack (13);Gear (15) passes through perforation, and adjusting assembly that drives rotating rod (14) to rotate is further provided on installation box (2), and the adjusting assembly includes turbine (16) that is rotatably installed in installation box (2), and worm (17) is configured in installation box (2) and can rotate, worm (17) is transmission cooperation with turbine (16), and one end of worm (17) is arranged outside installation box (2) and is configured with hand wheel (18).

2. The doctor adjustment mechanism for precision color registration in intaglio printing according to claim 1, characterized in that, Two side plates (1) are respectively installed with guide sleeve (4), and the two sides of installation box (2) are respectively configured with guide rod (3), guide rod (3) passes through corresponding guide sleeve (4) and is guided with guide sleeve (4) cooperation;The guide rod (3) of one side is connected with spring disc (5) after passing through guide sleeve (4), and compression spring (6) is arranged between spring disc (5) and the end surface of guide sleeve (4), and the guide rod (3) of the other side is controlled by driving component to adjust its lateral position;The driving component is fixed on side plate (1), and includes motor (7) and eccentric shaft (8) installed on the output end of motor (7), and the guide rod (3) is transmission connection with eccentric shaft (8) through hinged connecting rod (9).

3. The doctor adjustment mechanism for precision color registration in intaglio printing according to claim 1, wherein In the driving component, motor (7) drives eccentric shaft (8) to rotate, and eccentric shaft (8) drives guide rod (3) to move laterally through hinged connecting rod (9).

4. The doctor adjustment mechanism for precision color registration in intaglio printing according to claim 1, wherein In the adjusting assembly, turbine (16) is transmission cooperation with worm (17), and worm (17) drives turbine (16) to rotate when rotating, and turbine (16) drives rotating rod (14) to rotate, and gear (15) on rotating rod (14) is engaged with rack (13) of lifting rod (10), and drives lifting rod (10) to vertically lift.

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