Offset printing device

Abstract

The utility model belongs to the technical field of printing production, and particularly relates to an offset printing device which comprises a base frame, and further comprises a swing mechanism, a first driving mechanism, a second driving mechanism, a third driving mechanism and a fourth driving mechanism, the traction mechanism comprises a first traction roller, a pressing roller and a driving part, the first traction roller is used for pulling the flexible material to move in a routing mode, the pressing roller is used for abutting against the flexible material which passes through the first traction roller in the routing mode, and the driving part is used for driving the pressing roller to move; the printing mechanism is used for printing flexible materials; the adjusting mechanism comprises a second traction roller, a second passing roller and a second swing roller, and the second swing roller is movably arranged on the base frame in the X direction and located between the second traction roller and the second passing roller; the printing mechanism has the advantages that waste of flexible materials is avoided, meanwhile, the flexible materials located on the downstream of the printing mechanism are prevented from being pulled and broken, the flexible materials located on the upstream of the printing mechanism are prevented from loosening and mopping the ground, the structure is simple, convenience and practicability are achieved, and economic benefits are high.

Description

Technical Field

[0001] This utility model belongs to the field of printing production technology, and in particular relates to an offset printing device. Background Technology

[0002] Currently, offset printing equipment is the core equipment of modern printing. Its core principles are "oil and water immiscibility" and "indirect printing." It typically includes a plate cylinder, a blanket cylinder, an impression cylinder, and an inking mechanism. Through a complex mechanical structure, it precisely controls the transfer of ink and dampening solution, ultimately transferring the image onto the substrate.

[0003] In the existing technology, since most offset printing equipment's rubber rollers only transfer ink patterns through contact with the printing plate cylinder in a localized area, after the rubber roller rotates once, a large portion of the flexible material passing between the rubber roller and the impression cylinder will remain unprinted, easily causing waste of flexible material and resulting in excessively high production costs. Utility Model Content

[0004] The purpose of this invention is to provide an offset printing device to address the aforementioned technical problems.

[0005] In view of this, the present invention provides an offset printing device, including a base frame, and further comprising:

[0006] The swing mechanism includes a first guide roller and a first swing roller. The first guide roller is mounted on the base frame, and the first swing roller is movable on the base frame along the Z direction.

[0007] The traction mechanism includes a first traction roller, a pressure roller, and a driving component. The first traction roller is mounted on the base frame for traction of flexible material to move along the line. The pressure roller is movably mounted on the base frame for abutting against the flexible material that is moving along the line through the first traction roller. The driving component is mounted on the base frame for driving the pressure roller to move.

[0008] The printing mechanism is mounted on the base frame and located downstream of the traction mechanism, and is used to print flexible materials.

[0009] The adjustment mechanism includes a second traction roller, a second guide roller, and a second swing roller. The second traction roller and the second guide roller are mounted on the base frame, and the second swing roller is movable along the X direction and is mounted on the base frame between the second traction roller and the second guide roller.

[0010] Furthermore, the swing mechanism includes:

[0011] The first fixed frame is movably mounted on the base frame along the Z direction;

[0012] The first drive unit is installed inside the base frame and is used to drive the first fixed frame to move.

[0013] The first swing roller is mounted on the first fixed frame.

[0014] Furthermore, the regulatory bodies include:

[0015] The second fixed frame is movably mounted on the base frame along the X direction;

[0016] The second drive unit is installed inside the base frame and is used to drive the second fixed frame to move.

[0017] The second swing roller is mounted on the second fixed frame.

[0018] Furthermore, it also includes a slider guide rail module, with both the first and second fixed frames connected to the base frame via the slider guide rail module.

[0019] Furthermore, both the first drive unit and the second drive unit are cylinders.

[0020] Furthermore, it also includes a drying mechanism, located downstream of the printing mechanism, for drying flexible materials.

[0021] Furthermore, the drying mechanism is a UV lamp.

[0022] The beneficial effects of this utility model are:

[0023] The first and second traction rollers can pull the unprinted flexible material back to the upstream of the printing mechanism, avoiding waste. Simultaneously, by setting swing and adjustment mechanisms upstream and downstream of the printing mechanism respectively, when the first and second traction rollers reverse and pull the flexible material back, the first and second swing rollers move respectively, adjusting the length of the flexible material upstream and downstream of the printing mechanism. This prevents the flexible material downstream from being pulled and broken and prevents the flexible material upstream from being loose and dragging on the ground. The structure is simple, convenient, practical, and economically efficient. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the swing mechanism in this utility model;

[0026] Figure 3 This is a schematic diagram of the adjustment mechanism in this utility model;

[0027] The markings in the diagram are as follows:

[0028] 1. Base frame; 2. First guide roller; 3. First swing roller; 4. First traction roller; 5. Pressure roller; 6. Drive unit; 7. Second traction roller; 8. Second guide roller; 9. Second swing roller; 10. First fixed frame; 11. First drive unit; 12. Second fixed frame; 13. Second drive unit; 14. Drying mechanism; 15. Feeding roller; 16. Printing roller; 17. Bearing roller. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0031] Example 1:

[0032] This embodiment provides an offset printing apparatus, including a base frame 1, and further comprising:

[0033] The swing mechanism includes a first guide roller 2 and a first swing roller 3. The first guide roller 2 is disposed on the base frame 1, and the first swing roller 3 is movable on the base frame 1 along the Z direction.

[0034] The traction mechanism includes a first traction roller 4, a pressure roller 5, and a driving component 6. The first traction roller 4 is mounted on the base frame 1 for traction of flexible material to move along the line. The pressure roller 5 is movably mounted on the base frame 1 for abutting against the flexible material that is moving along the line through the first traction roller 4. The driving component 6 is mounted on the base frame 1 for driving the pressure roller 5 to move.

[0035] The printing mechanism is mounted on the base frame 1 and located downstream of the traction mechanism, and is used to print flexible materials.

[0036] The adjustment mechanism includes a second traction roller 7, a second guide roller 8, and a second swing roller 9. The second traction roller 7 and the second guide roller 8 are disposed on the base frame 1, and the second swing roller 9 is movable along the X direction on the base frame 1 and is located between the second traction roller 7 and the second guide roller 8.

[0037] In this technical solution, the flexible material to be printed sequentially passes through a swing mechanism, a traction mechanism, a printing mechanism, and an adjustment mechanism. The first traction roller 4 and the second traction roller 7 are both controlled by servo motors to rotate and traction the flexible material. During operation, the offset printing device feeds material to the printing mechanism via an ink path system. This ink path system is existing technology and includes structures such as an ink fountain roller, an ink transfer roller, and an inking roller, which will not be described in detail. The printing mechanism includes a feeding roller 15, a printing roller 16, and a carrying roller 17. The ink path system evenly and appropriately coats the graphic portion of the feeding roller 15 with ink, leaving the non-graphic portion un-inked. Then, the graphic portion of the feeding roller 15 contacts the printing roller 16, transferring the ink onto the printing roller 16. Finally, the printing roller 16 prints the ink onto the flexible material, completing the printing process.

[0038] Since only a localized area of ​​the printing cylinder 16 has ink patterns, after the printing cylinder 16 rotates one revolution, a large portion of the flexible material passing between the printing cylinder 16 and the carrying cylinder 17 will remain unprinted. At this time, the first traction roller 4 and the second traction roller 7 reverse their directions, causing the flexible material to move back, allowing the unprinted flexible material to return to the upstream of the printing mechanism. Simultaneously, the swing mechanism and the adjustment mechanism operate, with the first swing roller 3 moving downwards along the Z-axis, increasing the length of the flexible material passing between the first traction roller 4 and the first guide roller 2, thus ensuring that the retracting flexible material is in a taut state and preventing slack from affecting its movement. The second swing roller 9 moves along the X-axis closer to the second traction roller 7 and the second guide roller 8, shortening the length of the flexible material passing between the second traction roller 7 and the second guide roller 8, preventing the printed flexible material from breaking due to the pulling force of the retraction.

[0039] In summary, the first traction roller 4 and the second traction roller 7 can pull the flexible material without printed patterns back to the upstream of the printing mechanism, avoiding waste of the flexible material. At the same time, by setting swing mechanisms and adjustment mechanisms upstream and downstream of the printing mechanism respectively, when the first traction roller 4 and the second traction roller 7 reverse and drive the flexible material back, the first swing roller 3 and the second swing roller 9 move respectively to adjust the length of the flexible material upstream and downstream of the printing mechanism, preventing the flexible material downstream of the printing mechanism from being pulled and broken and preventing the flexible material upstream of the printing mechanism from being loose and dragging on the ground. The structure is simple, convenient and practical, and has high economic benefits.

[0040] Example 2:

[0041] This embodiment provides an offset printing apparatus, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0042] Furthermore, the swing mechanism includes:

[0043] The first fixed frame 10 is movably mounted on the base frame 1 along the Z direction;

[0044] The first drive unit 11 is installed inside the base frame 1 and is used to drive the first fixed frame 10 to move.

[0045] The first swing roller 3 is mounted on the first fixed frame 10.

[0046] Furthermore, the regulatory bodies include:

[0047] The second fixing frame 12 is movably mounted on the base frame 1 along the X direction;

[0048] The second drive unit 13 is installed inside the base frame 1 and is used to drive the second fixed frame 12 to move.

[0049] The second swing roller 9 is mounted on the second fixed frame 12.

[0050] Furthermore, both the first drive unit 11 and the second drive unit 13 are cylinders.

[0051] In this technical solution, such as Figure 2 As shown, the swing mechanism specifically includes a first fixed frame 10 and a first drive unit 11. The first swing roller 3 is rotatably mounted on the first fixed frame 10 by means of a bearing. The first drive unit 11 can be a cylinder, which controls the first fixed frame 10 to move up and down in the Z direction, thereby realizing the Z-direction movement of the first swing roller 3.

[0052] like Figure 3 As shown, the adjustment mechanism specifically includes a second fixed frame 12 and a second drive unit 13. The second swing roller 9 is rotatably mounted on the second fixed frame 12 by means of a bearing. The second drive unit 13 can be a cylinder that drives the second fixed frame 12 to move along the X direction, thereby realizing the X-direction movement of the second swing roller 9.

[0053] Furthermore, it also includes a slider guide module, with both the first fixed frame 10 and the second fixed frame 12 connected to the base frame 1 via the slider guide module. This structural design guides the movement of the first fixed frame 10 and the second fixed frame 12 within the base frame 1, enhancing the smoothness of movement and reducing axial displacement of the flexible material during the movement of the first swing roller 3 and the second swing roller 9.

[0054] Example 3:

[0055] This embodiment provides an offset printing apparatus, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0056] Furthermore, it also includes a drying mechanism 14, which is located downstream of the printing mechanism and is used to dry flexible materials.

[0057] In this technical solution, the drying mechanism 14 can be an oven or a UV lamp, which can dry the flexible material of the printed pattern, so that the ink pattern can be quickly cured on the surface of the flexible material; preferably, the drying mechanism 14 is a UV lamp, which has a fast curing and drying speed and effectively improves production efficiency.

[0058] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An offset printing apparatus, comprising a base frame (1), characterized in that, Also includes: The swing mechanism includes a first guide roller (2) and a first swing roller (3). The first guide roller (2) is disposed on the base frame (1), and the first swing roller (3) is disposed on the base frame (1) movable along the Z direction. The traction mechanism includes a first traction roller (4), a pressure roller (5), and a driving member (6). The first traction roller (4) is mounted on the base frame (1) for traction of flexible material for the movement of the line. The pressure roller (5) is movably mounted on the base frame (1) for abutting the flexible material passing through the first traction roller (4). The driving member (6) is mounted on the base frame (1) for driving the pressure roller (5) to move. A printing mechanism, which is mounted on a base frame (1) and located downstream of the traction mechanism, is used to print flexible materials; The adjustment mechanism includes a second traction roller (7), a second passing roller (8), and a second swing roller (9). The second traction roller (7) and the second passing roller (8) are disposed on the base frame (1), and the second swing roller (9) is movably disposed on the base frame (1) along the X direction and is located between the second traction roller (7) and the second passing roller (8).

2. The offset printing apparatus according to claim 1, characterized in that, The swing mechanism includes: The first fixed frame (10) is movably mounted on the base frame (1) along the Z direction; The first drive unit (11) is installed inside the base frame (1) and is used to drive the first fixed frame (10) to move. The first swing roller (3) is mounted on the first fixed frame (10).

3. The offset printing apparatus according to claim 2, characterized in that, The adjustment mechanism includes: The second fixing frame (12) is movably mounted on the base frame (1) in the X direction; The second drive unit (13) is installed inside the base frame (1) and is used to drive the second fixed frame (12) to move. The second swing roller (9) is mounted on the second fixed frame (12).

4. The offset printing apparatus according to claim 3, characterized in that, It also includes a slider guide rail module, and the first fixed frame (10) and the second fixed frame (12) are both connected to the base frame (1) through the slider guide rail module.

5. The offset printing apparatus according to claim 3, characterized in that, Both the first drive unit (11) and the second drive unit (13) are cylinders.

6. The offset printing apparatus according to claim 1, characterized in that, It also includes a drying mechanism (14), which is located downstream of the printing mechanism and is used to dry flexible materials.

7. The offset printing apparatus according to claim 6, characterized in that, The drying mechanism (14) is a UV lamp.

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