Intaglio printing device capable of adjusting center roller spacing

Abstract

The utility model belongs to the technical field of printing, and particularly relates to an intaglio printing device with an adjustable center roller spacing, which comprises a support seat, a first printing roller, a second printing roller, a protective shell, a driving motor, a diamond rod and the like, the first printing roller and the second printing roller are distributed up and down, the first printing roller is rotatably arranged at the lower part of the support seat, and the second printing roller is rotatably arranged at the lower part of the support seat; the second printing roller is slidably and rotatably arranged on the upper portion of the supporting seat, the protective shell is installed on the left portion of the supporting seat, the driving motor is installed on the upper portion of the protective shell, an output shaft of the driving motor faces downwards, one end of the rhombic rod is fixedly connected to the output shaft of the driving motor through a coupler, and the two supporting blocks are distributed side by side and rotatably arranged at the two ends of the second printing roller. The sleeve is slidably arranged at one end of the rhombic rod. And through coordinated operation of a servo motor, a lead screw and a connecting plate in the adjusting assembly, the roller distance between the second printing roller and the first printing roller can be accurately adjusted according to diversified printing tasks, and the application range of the device is expanded.

Description

Technical Field

[0001] This utility model belongs to the field of printing technology, and in particular relates to a gravure printing device with adjustable center roller distance. Background Technology

[0002] Gravure printing, also known as intaglio printing, is a printing technique where the image areas are lower than the surface of the printing plate, while the non-image areas remain flush with the plate surface. A gravure printing apparatus is a device specifically designed for gravure printing processes.

[0003] However, in the design architecture of traditional gravure printing equipment, the installation layout of the two printing rollers generally adopts a rigid fixed bracket structure. The inherent characteristics of this structural design determine that the roller gap between the two printing rollers is strictly limited to a fixed value. During the printing operation, it is difficult to flexibly and accurately adjust the roller gap between the two printing rollers according to the actual printing needs, which to some extent limits the adaptability to diverse printing tasks.

[0004] Therefore, there is a particular need for a gravure printing device with adjustable center roller spacing to solve the above problems. Utility Model Content

[0005] To overcome the shortcomings of traditional gravure printing equipment, which uses a rigid fixed support structure to fix the distance between the two printing rollers, making it difficult to adjust flexibly and accurately and adapt to diverse printing tasks, this utility model provides a gravure printing device with an adjustable center roller distance.

[0006] This utility model is achieved through the following technical approach: an adjustable center roller gap gravure printing device, comprising a support base, a first printing roller, a second printing roller, a protective shell, a drive motor, a rhomboid rod, a first bevel gear, a second bevel gear, a sleeve, and support blocks. The first and second printing rollers are distributed vertically. The first printing roller is rotatably mounted on the lower part of the support base, while the second printing roller is slidably and rotatably mounted on the upper part of the support base. The protective shell is installed on the left side of the support base, and the drive motor is installed on the upper part of the protective shell with its output shaft facing downwards. One end of the rhomboid rod is fixed to the output shaft of the drive motor via a coupling. Two support blocks are rotatably mounted side-by-side on the second roller. At both ends of the printing roller, sleeves are slidably disposed at one end of a rhomboid rod. Two horizontally arranged first bevel gears are distributed vertically, one of which is fixed to the bottom end of the sleeve and slidably connected to the rhomboid rod, while the other is fixed to the other end of the rhomboid rod. Two vertically arranged second bevel gears are distributed vertically, one of which is fixed to one end of the second printing roller, and the other is fixed to one end of the first printing roller. The two second bevel gears mesh with the two first bevel gears respectively. The gravure printing device with adjustable center roller distance also includes an adjustment component, which is disposed between the second printing roller and the protective shell.

[0007] In one embodiment, the adjustment assembly includes a guide rail, a slider, a connecting plate, a servo motor, and a lead screw. The connecting plate is installed at the top of one of the support blocks and rotates with the upper part of the sleeve. Multiple guide rails are distributed front to back and installed on the upper right side of the support base. Each slider is slidably set on the corresponding guide rail. Each support block is located between every two sliders and is fixedly connected to them. The servo motor is installed on the upper part of the protective shell with its output shaft facing downward. One end of the lead screw is fixed to the output shaft of the servo motor through a coupling, and the other end rotates with the connecting plate.

[0008] In one embodiment, the device further includes a placement frame, a pusher, and an electric pusher. The placement frame is installed at the lower part of the support base. The lower part of the first printing roller is vertically immersed in the middle area inside the placement frame, which is the main ink storage area. The lower edge of the first printing roller maintains a predetermined distance from the inner bottom surface of the placement frame. The pusher is slidably placed inside the placement frame, with its bottom surface in contact with the inner bottom surface of the placement frame. The electric pusher is installed at the front of the placement frame, with its telescopic end facing upward and fixedly connected to the pusher.

[0009] In one embodiment, it also includes baffles, two baffles arranged side by side and fixed to the upper part of the placement frame, forming rotational contact with the first printing roller.

[0010] In one embodiment, the total width of the placement frame is much greater than the diameter of the first printing roller, and the redundant areas on both sides form ink buffer pools.

[0011] In one embodiment, a sealing gasket is provided on the side edge of the pusher that contacts the placement frame.

[0012] Beneficial effects: 1. By adjusting the coordinated operation of the servo motor, lead screw and connecting plate in the assembly, the roller gap between the second printing roller and the first printing roller can be precisely adjusted according to the diverse printing tasks, thus expanding the applicability of the device.

[0013] 2. By setting up an ink supply system consisting of a pusher and an electric pusher, the ink can be pushed up to a suitable position in time when the ink level drops, so that the first printing roller can always pick up sufficient ink, ensuring the color brightness and uniformity of the printed pattern, and reducing printing interruptions and waste caused by insufficient ink supply. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the support base, the first printing roller, and the second printing roller of this utility model.

[0016] Figure 3This is a partial cross-sectional view of the protective shell component of this utility model.

[0017] Figure 4 This is a partial cross-sectional view of the connecting plate component of this utility model.

[0018] Figure 5 This is a partial cross-sectional view of the placement frame component of this utility model.

[0019] In the diagram: 1. Support base, 2. First printing roller, 3. Second printing roller, 4. Protective shell, 5. Drive motor, 6. Diamond rod, 7. First bevel gear, 7. Second bevel gear, 8. Sleeve, 9. Support block, 10. Guide rail, 11. Slider, 12. Connecting plate, 13. Servo motor, 14. Lead screw, 15. Placement frame, 16. Baffle, 17. Pusher frame, 18. Electric push rod. Detailed Implementation

[0020] Example: This utility model discloses an adjustable center roller gap gravure printing device, such as... Figures 1-5As shown, the system includes a support base 1, a first printing roller 2, a second printing roller 3, a protective shell 4, a drive motor 5, a diamond-shaped rod 6, a first bevel gear 7, a second bevel gear 71, a sleeve 8, support blocks 9, and a placement frame 15. The first printing roller 2 and the second printing roller 3 are arranged vertically. The first printing roller 2 is rotatably mounted on the lower part of the support base 1, while the second printing roller 3 is slidably and rotatably mounted on the upper part of the support base 1. The protective shell 4 is bolted to the left side of the support base 1, and the drive motor 5 is bolted to the upper part of the protective shell 4 with its output shaft facing downwards. The upper end of the diamond-shaped rod 6 is fixedly connected to the output shaft of the drive motor 5 via a coupling. Two support blocks... 9 are arranged side-by-side and rotatably on the left and right ends of the second printing roller 3. A sleeve 8 is slidably mounted on the upper end of the rhomboid rod 6. Two horizontally arranged first bevel gears 7 are arranged vertically, with the upper first bevel gear 7 welded to the bottom end of the sleeve 8 and slidably connected to the rhomboid rod 6, and the lower first bevel gear 7 welded to the lower end of the rhomboid rod 6. Two vertically arranged second bevel gears 71 are arranged vertically, with the upper second bevel gear 71 welded to the right end of the second printing roller 3 and the lower second bevel gear 71 welded to the right end of the first printing roller 2. The two second bevel gears 71 mesh with the two first bevel gears 7 respectively, and the teeth of the two first bevel gears 7 are aligned. With the teeth of the upper first bevel gear 7 facing downwards and the teeth of the lower first bevel gear 7 facing upwards, when the diamond rod 6 drives the two first bevel gears 7 to rotate clockwise, the teeth of the upper first bevel gear 7, during downward meshing, will, according to the gear transmission principle, push the upper second bevel gear 71 meshing with it to rotate counterclockwise; similarly, the teeth of the lower first bevel gear 7, during upward meshing, will push the lower second bevel gear 71 meshing with it to rotate counterclockwise. The placement frame 15 is bolted to the lower part of the support base 1, and the lower part of the first printing roller 2 is vertically immersed in the middle area inside the placement frame 15, which is the main ink storage area. Furthermore, the lower edge of the first printing roller 2 maintains a predetermined distance from the inner bottom surface of the placement frame 15, and the total width of the placement frame 15 is much greater than the diameter of the first printing roller 2. The redundant areas on both sides form ink buffer pools. When the ink level in the main storage area drops due to printing consumption, the ink in the buffer pool automatically flows back to the main storage area to maintain a constant ink layer thickness. Two baffles 16 are welded side by side to the upper part of the placement frame 15 and form rotational contact with the first printing roller 2. They can block the ink thrown out from the left and right ends of the first printing roller 2 during the printing process. The system also includes an adjustment component, which is located between the second printing roller 3 and the protective shell 4.

[0021] like Figure 3 and Figure 4As shown, the adjustment assembly includes a guide rail 10, a slider 11, a connecting plate 12, a servo motor 13, and a lead screw 14. The connecting plate 12 is bolted to the top of the right support block 9 and rotates with the upper part of the sleeve 8. The four guide rails 10 are bolted to the upper right side of the support base 1. Each slider 11 is slidably set on the corresponding guide rail 10. Each support block 9 is located between every two sliders 11 and is fixedly connected to them to ensure that the support block 9 moves in a straight line when it moves. The servo motor 13 is bolted to the upper part of the protective shell 4, with its output shaft facing downwards. The upper end of the lead screw 14 is fixedly connected to the output shaft of the servo motor 13 through a coupling, and the lower end rotates with the connecting plate 12.

[0022] like Figure 5 As shown, the gravure printing apparatus with adjustable center roller gap also includes a pusher frame 17 and an electric push rod 18. The pusher frame 17 is slidably placed inside the placement frame 15, with its bottom surface in contact with the inner bottom surface of the placement frame 15. It can replace the inner bottom surface of the placement frame 15 to receive ink. A sealing gasket is covered on the side edge of the pusher frame 17 that contacts the placement frame 15 to prevent ink from flowing into the inner bottom surface of the placement frame 15 through the gap between the pusher frame 17 and the placement frame 15 when the pusher frame 17 pushes the ink inside the placement frame 15. The electric push rod 18 is bolted to the middle position of the front of the placement frame 15, with its telescopic end facing upward and fixedly connected to the pusher frame 17.

[0023] When this device is needed for printing operations, the operator first starts the servo motor 13, whose output shaft drives the lead screw 14 to rotate clockwise. Driven by the lead screw 14, the connecting plate 12 drives the right support block 9 to move upward, and at the same time drives the sleeve 8 to move upward. When the right support block 9 moves upward, it drives the second printing roller 3 to move upward together. When the sleeve 8 moves upward, it drives the upper first bevel gear 7 to move upward until the second printing roller 3 moves to the appropriate position and opens the appropriate roller distance from the first printing roller 2. Then, the servo motor 13 is turned off.

[0024] The ink is then poured into the placement frame 15 and received by the pusher frame 17. One end of the material to be printed is then inserted between the first printing roller 2 and the second printing roller 3. The drive motor 5 is then started, and its output shaft drives the diamond rod 6 to rotate clockwise. The first bevel gears 7 on the upper and lower sides rotate clockwise together with the diamond rod 6 and mesh with the second bevel gears 71 on the upper and lower sides. This causes the second bevel gears 71 on the upper and lower sides to drive the second printing roller 3 and the first printing roller 2 to rotate counterclockwise. When the first printing roller 2 rotates, its printing surface picks up the ink in the placement frame 15 and prints the ink on the surface of the material to achieve printing. The printed material is then conveyed backward by the cooperation of the first printing roller 2 and the second printing roller 3.

[0025] During the printing process, the electric push rod 18 is intermittently activated according to the ink level change in the placement frame 15. The extension end of the push rod is controlled to move the pusher frame 17 upward, pushing up the ink in the placement frame 15 so that the ink is always kept at a suitable height. This ensures that the first printing roller 2 can continuously pick up ink during rotation. After printing is completed, the drive motor 5 is turned off, and the entire printing process ends.

Claims

1. A gravure printing apparatus with adjustable center roller spacing, comprising a support base (1), a first printing roller (2), a second printing roller (3), a protective shell (4), a drive motor (5), a diamond-shaped rod (6), a first bevel gear (7), a second bevel gear (71), a sleeve (8), and a support block (9), wherein the first printing roller (2) and the second printing roller (3) are arranged vertically, and wherein, The first printing roller (2) is rotatably mounted on the lower part of the support base (1), the second printing roller (3) is slidably and rotatably mounted on the upper part of the support base (1), the protective shell (4) is mounted on the left side of the support base (1), the drive motor (5) is mounted on the upper part of the protective shell (4), its output shaft faces downward, one end of the rhomboid rod (6) is fixed to the output shaft of the drive motor (5) through a coupling, two support blocks (9) are rotatably mounted side by side on both ends of the second printing roller (3), the sleeve (8) is slidably mounted on one end of the rhomboid rod (6), and two horizontally mounted first bevel gears (7) are distributed vertically, one of the first bevel gears (7) is fixed to the sleeve The bottom end of the cylinder (8) is slidably connected to the rhomboid rod (6), and another first bevel gear (7) is fixed to the other end of the rhomboid rod (6). Two vertically arranged second bevel gears (71) are distributed vertically, one of which is fixed to one end of the second printing roller (3), and the other is fixed to one end of the first printing roller (2). The two second bevel gears (71) mesh with the two first bevel gears (7) respectively. The gravure printing device with adjustable center roller distance also includes an adjustment component, which is arranged between the second printing roller (3) and the protective shell (4).

2. The gravure printing apparatus with adjustable center roller spacing according to claim 1, characterized in that, The adjustment assembly includes a guide rail (10), a slider (11), a connecting plate (12), a servo motor (13), and a lead screw (14). The connecting plate (12) is installed at the top of one of the support blocks (9) and rotates with the upper part of the sleeve (8). Multiple guide rails (10) are distributed and installed on the upper right side of the support base (1). Each slider (11) is slidably set on the corresponding guide rail (10). Each support block (9) is located between every two sliders (11) and is fixedly connected to them. The servo motor (13) is installed on the upper part of the protective shell (4) with its output shaft facing downward. One end of the lead screw (14) is fixed to the output shaft of the servo motor (13) through a coupling, and the other end rotates with the connecting plate (12).

3. The gravure printing apparatus with adjustable center roller spacing according to claim 2, characterized in that, It also includes a placement frame (15), a pusher frame (17), and an electric push rod (18). The placement frame (15) is installed at the lower part of the support base (1). The lower part of the first printing roller (2) is vertically immersed in the middle area inside the placement frame (15). This area is the main ink storage area. The lower edge of the first printing roller (2) is kept at a predetermined distance from the inner bottom surface of the placement frame (15). The pusher frame (17) is slidably placed inside the placement frame (15). Its bottom surface is in contact with the inner bottom surface of the placement frame (15). The electric push rod (18) is installed at the front of the placement frame (15). Its telescopic end is fixedly connected to the pusher frame (17) with its telescopic end facing upward.

4. The gravure printing apparatus with adjustable center roller gap according to claim 3, characterized in that, It also includes baffles (16), two baffles (16) are arranged side by side and fixed to the upper part of the placement frame (15), and form rotational contact with the first printing roller (2).

5. The gravure printing apparatus with adjustable center roller spacing according to claim 4, characterized in that, The total width of the placement frame (15) is much greater than the diameter of the first printing roller (2), and the redundant areas on both sides form ink buffer pools.

6. The gravure printing apparatus with adjustable center roller spacing according to claim 5, characterized in that, A sealing gasket is provided on the side edge of the pusher (17) that contacts the placement frame (15).

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