A tension precision control device for a wide-format gravure printing machine

Abstract

This invention proposes a tension precision control device for a wide-format gravure printing machine, comprising: a printing frame, an adjustment structure fixedly mounted on the upper surface of the printing frame, the adjustment structure including limiting frames fixedly mounted on the upper sides of both sides of the printing frame, lifting cylinders fixedly mounted above each of the two limiting frames, guide plates fixedly connected to the output ends of each of the two lifting cylinders, and guide sliders symmetrically fixedly mounted on the inner walls of the guide plates, the outer walls of each of the two guide plates fixedly connected to both ends of a driven tension roller, an active tension roller mounted on the rear side of the limiting frames, two printing rollers symmetrically rotated and mounted inside the printing frame, with a plastic film between the two printing rollers, and a disassembly structure located below the two printing rollers inside the printing frame. This invention can control the tension of the printing material to avoid problems such as wrinkles.

Description

Technical Field

[0001] This utility model relates to the field of wide-format gravure printing presses, and in particular to a device for precise tension control of wide-format gravure printing presses. Background Technology

[0002] A wide-format gravure printing press is a type of equipment used in the printing industry. It is mainly used for high-quality printing on wide-format printing substrates. It employs gravure printing technology, in which the image area of ​​the printing plate is lower than the blank area. During printing, ink is first filled into the recesses of the printing plate, and then the ink in the recesses is transferred to the printing substrate through devices such as impression cylinders, thereby achieving the printing of images and text.

[0003] Existing wide-format gravure printing machines have some shortcomings in use. They often experience insufficient tension and looseness when processing plastic films, which can easily cause wrinkles and tangles in the plastic film during winding. This affects the stable processing of plastic films, reduces the printing efficiency, and makes them inconvenient to use. To address these issues, a tension precision control device for wide-format gravure printing machines is proposed for improvement and upgrading. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the existing technology. This utility model addresses the existing technical problems.

[0005] To solve the above-mentioned technical problems, the technical solution adopted in this utility model is as follows: a printing frame, wherein an adjustment structure is fixedly provided on the upper surface of the printing frame, the adjustment structure includes limiting frames fixedly installed on the upper ends of both sides of the printing frame, a lifting cylinder is fixedly provided above each of the two limiting frames, a guide plate is fixedly connected to the output end of each of the two lifting cylinders, and guide sliders are symmetrically fixedly provided on the inner wall of the guide plate, and the outer walls of the two guide plates are fixedly connected to both ends of the driven tension roller, an active tension roller is provided on the rear side of the limiting frame, two printing rollers are symmetrically rotated and installed inside the printing frame, and a plastic film is provided between the two printing rollers, and a disassembly structure is provided inside the printing frame below the two printing rollers.

[0006] Furthermore, each of the two limiting frames has two guide grooves inside, and two sets of guide sliders are slidably connected inside the guide grooves. One end of the lifting cylinder passes through the upper end of the limiting frame.

[0007] Furthermore, the outer surface of the driven tension roller is in contact with the plastic film, and the two ends of the active tension roller are rotatably mounted on the upper end of the printing frame. A servo motor is fixedly installed on the outer wall of the printing frame, and the output end of the servo motor is fixedly connected to one end of the active tension roller.

[0008] Furthermore, an unwinding roller is rotatably installed on the bottom of the inner wall of the printing press frame, and two opposing limiting rollers are rotatably installed on the outer wall of the limiting frame on the front side of the printing press frame, with the two limiting rollers being the same size.

[0009] Furthermore, the disassembly structure includes a collection tray, with snap-fit ​​plates fixedly installed at both ends of the collection tray. One end of each snap-fit ​​plate is snapped onto a limiting post, and both limiting posts are fixedly installed on both sides of the front outer wall of the printing press frame.

[0010] Furthermore, two fixing blocks are fixedly installed on the rear outer wall of the printing press frame at symmetrical positions of the two limiting posts. The two fixing blocks have movable grooves inside, and limiting protrusions are fixedly installed inside the movable grooves.

[0011] Furthermore, the fixed block is movably connected to a plug rod, and a toggle rod is fixedly installed on the outer wall of the plug rod. One end of each of the two snap-fit ​​plates has a plug hole, which is adapted to the size of the plug rod. Two liquid outlet pipes are symmetrically arranged at the bottom of the collection tray.

[0012] Compared with existing technologies, the beneficial effects of this invention are as follows: By setting up components such as a servo motor, an active tension roller, a lifting cylinder, a guide plate, and a driven tension roller, the speed of the servo motor is precisely adjusted to drive the speed of the active tension roller, thereby controlling the feeding speed of the plastic film and achieving tension adjustment. At the same time, by driving the lifting cylinder to move the driven tension roller 54 stably downward to pre-tighten the plastic film, the tension of the plastic film is precisely controlled, avoiding problems such as insufficient tension causing wrinkles during winding and improving the winding stability of the plastic film.

[0013] By setting up components such as a collection tray, limiting post, fixing block, toggle rod, snap-fit ​​plate, and plug-in rod, the plug-in rod is moved by rotating the toggle rod, causing the plug-in rod to misalign with the plug-in hole on the snap-fit ​​plate. Then, the snap-fit ​​plate on one end of the collection tray is misaligned with the limiting post, which makes it easy to quickly disassemble the collection tray for cleaning and avoids problems such as disassembly difficulties caused by bolt fixing. The operation is convenient. Attached Figure Description

[0014] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0015] Figure 1 The schematic diagram shows the overall structure of a tension precision control device for a wide-format gravure printing press according to one embodiment of the present invention;

[0016] Figure 2The schematic diagram shows the rear structure of a tension precision control device for a wide-format gravure printing press according to one embodiment of the present invention.

[0017] Figure 3 for Figure 1 Schematic diagram of local adjustment structure;

[0018] Figure 4 for Figure 3 Schematic diagram of the partial split structure;

[0019] Figure 5 for Figure 4 A partial enlarged diagram of the split structure;

[0020] Figure 6 for Figure 5 A magnified schematic diagram of the local structure.

[0021] The following are the labels in the diagram: 1. Printing press frame; 2. Plastic film; 3. Servo motor; 4. Active tension roller; 5. Adjustment structure; 51. Lifting cylinder; 52. Guide plate; 53. Guide slider; 54. Driven tension roller; 55. Limiting frame; 56. Guide chute; 6. Disassembly structure; 61. Collection tray; 62. Clip plate; 63. Limiting post; 64. Fixing block; 65. Actuating rod; 66. Insertion rod; 67. Limiting protrusion; 68. Liquid outlet pipe; 69. Insertion hole; 7. Printing roller; 8. Unwinding roller; 9. Limiting roller. Detailed Implementation

[0022] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this utility model and should not be considered as the entirety of this utility model or as a limitation or restriction of its technical solution.

[0023] According to one embodiment of this utility model, combined with Figure 1 - Figure 6 The diagram illustrates a tension precision control device for a wide-format gravure printing machine, comprising: a printing frame 1, an adjustment structure 5 fixedly mounted on the upper surface of the printing frame 1, the adjustment structure 5 including limit frames 55 fixedly mounted on the upper ends of both sides of the printing frame 1, lifting cylinders 51 fixedly mounted above each of the two limit frames 55, guide plates 52 fixedly connected to the output ends of each of the two lifting cylinders 51, and guide sliders 53 symmetrically fixedly mounted on the inner walls of the guide plates 52, the outer walls of the two guide plates 52 fixedly connected to both ends of the driven tension rollers 54, an active tension roller 4 mounted on the rear side of the limit frames 55, two printing rollers 7 symmetrically rotated and mounted inside the printing frame 1, with a plastic film 2 between the two printing rollers 7, and a disassembly structure 6 located below the two printing rollers 7 inside the printing frame 1.

[0024] From this embodiment Figure 3 - Figure 4 As shown: Two guide grooves 56 are opened inside each of the two limit frames 55. Two sets of guide sliders 53 are slidably connected inside the guide grooves 56. One end of the lifting cylinder 51 is inserted through the upper end of the limit frame 55. The outer surface of the driven tension roller 54 is in contact with the plastic film 2. The two ends of the active tension roller 4 are rotatably installed on the upper end of the printing frame 1. A servo motor 3 is fixedly installed on the outer wall of the printing frame 1, and the output end of the servo motor 3 is fixedly connected to one end of the active tension roller 4. An unwinding roller 8 is rotatably installed at the bottom of the inner wall of the printing frame 1. The front side of the printing frame 1 is located on the outer wall of the limit frame 55, and the two limit rollers 9 are rotatably installed in opposite positions. The two limit rollers 9 are the same size.

[0025] When the driven tension roller 54 on the guide plate 52 is moved by the lifting cylinder 51, the guide slider 53 on the outer wall of the guide plate 52 moves and is limited in the guide groove 56 in the limit frame 55, which facilitates the stable lifting and lowering of the driven tension roller 54 to adjust the extrusion tension of the plastic film 2. At the same time, the outer walls of the two printing rollers 7 are fixedly equipped with drive motors, and the lower part of the active tension roller 4 is equipped with a limit bracket to limit the plastic film 2 during re-feeding. By connecting the servo motor 3 to the servo driver on the outside, the servo driver receives the signal from the controller, converts it into a drive signal suitable for the servo motor 3, controls the speed of the servo motor 3, thereby adjusting the speed of the active tension roller 4, and thus controlling the feeding speed of the plastic film 2 to achieve tension adjustment. The servo driver is generally cuboid in shape, and the outer shell is usually made of aluminum alloy metal.

[0026] From this embodiment Figure 5 - Figure 6 As shown: The disassembly structure 6 includes a collection tray 61. Both ends of the collection tray 61 are fixedly provided with snap-fit ​​plates 62. One end of the two snap-fit ​​plates 62 is snapped onto the limiting post 63, and the two limiting posts 63 are fixedly installed on both sides of the front outer wall of the printing machine frame 1. The rear outer wall of the printing machine frame 1 is fixedly installed with two fixing blocks 64 at symmetrical positions of the two limiting posts 63. The two fixing blocks 64 have movable grooves inside, and the movable grooves are fixedly installed with limiting protrusions 67. The fixing blocks 64 are movably connected with plug rods 66, and the plug rods 66 have toggle rods 65 fixedly installed on their outer walls. One end of the two snap-fit ​​plates 62 has plug holes 69 inside, and the plug holes 69 are adapted to the size of the plug rods 66. Two liquid outlet pipes 68 are symmetrically arranged at the bottom of the collection tray 61.

[0027] When the printed ink falls into the collection tray 61, it can be collected and processed by opening the outlet pipe 68. When the printing machine is not working and the collection tray 61 needs to be cleaned, simply rotate the plug rod 66 by moving the two toggle levers 65 on both sides to rotate it by a certain angle, and then move it outward to offset it from the plug hole 69. Then, pull out the other end of the collection tray 61 and the limiting post 63. This makes it easy to quickly disassemble the collection tray 61 for cleaning. The installation principle is the same as above.

[0028] Workflow: First, the operator passes the plastic film 2 on the unwinding roller 8 between the two printing rollers 7 along the lower limiting roller 9. External power is then connected, and two drive motors are turned on to rotate the two printing rollers 7 to print the plastic film 2. Then, one end of the printed plastic film 2 is conveyed from the rear side of the printing frame 1 along the outer wall of the active tension roller 4. This facilitates printing on the plastic film 2. After printing on the printing roller 7, the servo motor 3 drives the active tension roller 4 to move the plastic film 2 forward, causing one end of the plastic film 2 to be conveyed from the surface of the upper limiting roller 9 for collection and packaging. When the printed plastic film 2 is being rewound, it may become loose due to insufficient tension. At this time, the speed of the servo motor 3 is adjusted to control the speed of the active tension roller 4, thus controlling the feed speed of the plastic film 2 and achieving tension adjustment. Simultaneously, two lifting cylinders 51 drive the guide plate 5... The two guide sliders 53 slide stably within the guide groove 56, causing the driven tension roller 54 to move slowly downwards to squeeze the plastic film 2, facilitating pre-tensioning and straightening the plastic film 2. This prevents insufficient tension and wrinkles during winding. When the two printing rollers 7 print on the plastic film 2, ink can easily fall into the collection tray 61. When the collection tray 61 needs cleaning, the operator manually pulls the lever 65 to rotate the insertion rod 66 to 90 degrees, dislocating it from the limiting protrusion 67. Then, pulling the two levers 65 moves the insertion rod 66 outwards, dislocating it from the insertion holes 69 on the two locking plates 62. The collection tray 61 is then pulled out using one end of the two locking plates 62 and the limiting post 63, facilitating quick disassembly and cleaning of the collection tray 61. This avoids the difficulties in disassembly caused by bolt fixing, which makes quick disassembly and cleaning of the collection tray 61 much easier.

[0029] The scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A tension precision control device for a wide-format gravure printing machine, characterized in that, include: A printing frame (1) is provided with an adjustment structure (5) fixedly installed on the upper surface of the printing frame (1). The adjustment structure (5) includes a limiting frame (55) fixedly installed on the upper sides of both sides of the printing frame (1). A lifting cylinder (51) is fixedly installed above each of the two limiting frames (55). A guide plate (52) is fixedly connected to the output end of each of the two lifting cylinders (51), and a guide slider (53) is symmetrically fixedly installed on the inner wall of the guide plate (52). The outer walls of the two guide plates (52) are fixedly connected to both ends of the driven tension roller (54). An active tension roller (4) is provided on the rear side of the limiting frame (55). Two printing rollers (7) are symmetrically rotated and installed inside the printing frame (1), and a plastic film (2) is provided between the two printing rollers (7). A disassembly structure (6) is provided inside the printing frame (1) below the two printing rollers (7).

2. The precise tension control device for a wide-format gravure printing machine according to claim 1, wherein Two guide grooves (56) are provided inside each of the two limiting frames (55), and two sets of guide sliders (53) are slidably connected inside the guide grooves (56). One end of the lifting cylinder (51) is inserted through the upper end of the limiting frame (55).

3. The tension precision control device for a wide-format gravure printing machine according to claim 2, wherein The outer surface of the driven tension roller (54) is in contact with the plastic film (2). The two ends of the active tension roller (4) are rotatably mounted on the upper end of the printing frame (1). A servo motor (3) is fixedly installed on the outer wall of the printing frame (1), and the output end of the servo motor (3) is fixedly connected to one end of the active tension roller (4).

4. The precise tension control device for wide-format gravure printing machine according to claim 1, wherein, The bottom of the inner wall of the printing press frame (1) is rotatably mounted with a roll unwinding roller (8), and the front side of the printing press frame (1) is rotatably mounted with opposing limit rollers (9) on the outer wall of the limit frame (55). The two limit rollers (9) are the same size.

5. The precise tension control device for wide-format gravure printing machine according to claim 1, wherein, The disassembly structure (6) includes a collection tray (61), and two ends of the collection tray (61) are fixedly provided with snap-fit ​​plates (62). One end of the two snap-fit ​​plates (62) is snapped onto the limiting post (63), and the two limiting posts (63) are fixedly installed on both sides of the front outer wall of the printing machine frame (1).

6. The precise tension control device for a wide-format gravure printing machine according to claim 5, wherein The printing press frame (1) has two fixing blocks (64) fixedly installed on the rear outer wall at the symmetrical position of the two limiting posts (63). The two fixing blocks (64) have movable grooves inside, and the limiting protrusions (67) are fixedly installed inside the movable grooves.

7. The tension precision control device for a wide-format gravure printing machine according to claim 6, wherein The fixed block (64) is movably connected to the plug rod (66), and the plug rod (66) is fixedly installed with a toggle rod (65) on the outer wall. The two snap-fit ​​plates (62) have plug holes (69) inside one end. The plug holes (69) are adapted to the size of the plug rod (66). The bottom of the collection tray (61) is symmetrically provided with two liquid outlet pipes (68).

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