Single-plate multi-printing-roller set and single-plate multi-printing-roller printing device

Abstract

The utility model provides a single-plate multi-printing-roller set and a single-plate multi-printing-roller printing device, and the single-plate multi-printing-roller set comprises an anilox roller which is used for inking; a flexible printing plate is arranged on the surface of a roller body of the printing roller; the transfer printing roller set is composed of a plurality of transfer printing rollers, one transfer printing roller in the transfer printing roller set is arranged between the anilox roller and the printing roller, and printing ink on a roller body of the anilox roller is transferred to the flexible printing plate on the surface of a roller body of the printing roller through the transfer printing roller; ink transfer printing faces with different widths are arranged on the surfaces of transfer printing roller bodies of the transfer printing rollers correspondingly, and the widths of the ink transfer printing faces of the transfer printing rollers are smaller than or equal to the width of the flexible printing plate on the surfaces of the roller bodies of the printing rollers. The technical problem that in the prior art, cost is too high when a flexible printing plate is replaced to print patterns of different sizes is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of corrugated board printing, in particular to a single-plate multi-printing roller group and a single-plate multi-printing printing device. Background Art

[0002] The printing part of a flexographic printing press usually includes a printing roller, an anilox roller and an impression roller, and the three rotate synchronously through a transmission mechanism. The anilox roller provides a certain amount of ink to the plate roller, and the product to be printed passes between the plate roller and the impression roller. The plate roller and the impression roller clamp the printed product and print the pattern on the plate roller. A flexible printing plate is generally wound around the printing roller, and the flexible printing plate is used to transfer ink through an anilox roller for printing. A flexible printing plate is a printing plate with a convex mirror image of the desired image made on a rubber plate, a photosensitive resin plate, etc. The amount of ink transferred to the flexible printing plate is controlled by the anilox roller. The printing plate contacts the product to be printed during the rotation process, thereby transferring the image and text.

[0003] Generally speaking, the process of flexible printing corrugated boxes is to print directly on corrugated cardboard. Currently, the production process of corrugated boxes also adopts the method of pre-printing facial paper. After the pattern is pre-printed on the facial paper, the facial paper is compounded with the corrugated paper core. However, since each product needs to prepare corrugated boxes of various sizes, in order to facilitate subsequent processing, the width of the facial paper is also cut into various different widths before printing. In order to print patterns on facial paper of different widths, multiple flexible printing plates corresponding to the width of facial paper are often provided in the prior art, and patterns are printed on facial paper of different widths by replacing the flexible printing plates. Since different products need to print different patterns, after a product is printed, the corresponding multiple flexible printing plates will be discarded and cannot be used for other products. Each time the printed pattern is changed, a batch of flexible printing plates needs to be discarded, and the replacement cost is high.

[0004] Therefore, the prior art needs to be further developed. Utility Model Content

[0005] The utility model aims to overcome the above technical deficiencies and provide a single-plate multi-printing roller group and a single-plate multi-printing printing device to solve the technical problem of high cost of replacing flexible printing plates to print patterns of different sizes in the related art.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] In the first aspect, the utility model provides a single-plate multi-printing roller group, comprising: an anilox roller, the anilox roller is used for inking; a printing roller, a flexible printing plate is arranged on the roller surface of the printing roller; a transfer roller group, the transfer roller group is composed of a plurality of transfer rollers, a transfer roller in the transfer roller group is arranged between the anilox roller and the printing roller, and the ink on the roller body of the anilox roller is transferred to the flexible printing plate on the roller surface of the printing roller through the transfer roller, wherein the transfer roller surfaces of the plurality of transfer rollers respectively have ink transfer surfaces of different widths, and the width of the ink transfer surfaces of the plurality of transfer rollers is less than or equal to the width of the flexible printing plate on the roller surface of the printing roller.

[0008] The technical solution is further configured that the transfer roller body of the transfer roller includes a roller core and an elastic contact layer arranged in sequence from the inside to the outside, and the ink transfer surface is arranged on the elastic contact layer.

[0009] The technical solution is further configured that the elastic contact layer is made of polyurethane, rubber or chloroprene rubber.

[0010] The technical solution is further configured that the elastic contact layer is made of EPDM rubber.

[0011] The technical solution is further configured such that the transfer roller group includes: a first transfer roller, the width of the ink transfer surface on the first transfer roller is equal to the width of the flexible printing plate on the roller surface of the printing roller; and a second transfer roller, the width of the ink transfer surface of the second transfer roller is not less than 1 / 3 of the width of the flexible printing plate on the roller surface of the printing roller.

[0012] The technical solution is further configured that the transfer roller body length l of the nth transfer roller in the transfer roller group n For: n =L-0.2n, and l n >0.2m, where L is the width of the flexographic printing plate.

[0013] The technical solution is further configured such that the printing roller is connected to the output end of the first motor, and the transfer roller is connected to the output end of the second motor; when printing, the first motor runs, and the printing roller acts as an active roller to drive the transfer roller and the anilox roller to rotate; when not printing, the first motor stops, the second motor runs, and the transfer roller acts as an active roller to drive the anilox roller to rotate.

[0014] The technical solution is further configured such that the transfer roller also includes a roller shaft, the roller core is detachably mounted on the roller shaft, a convex strip extending along the length direction of the roller shaft is provided on the surface of the roller shaft, and a limiting groove for the convex strip to pass through is provided on the roller core.

[0015] The technical solution is further configured that the transfer roller also includes a limit assembly, which is detachably connected to the roller shaft. When in use, the limit assembly is installed at both ends of the transfer roller body to limit the axial movement of the transfer roller body.

[0016] In the second aspect, the utility model provides a single-plate multi-print printing device, including an embossing roller and the above-mentioned single-plate multi-printing roller group, wherein the embossing roller is transmission-connected to the printing roller; when the single-plate multi-print printing device is in working state, the printing material passes between the flexible printing plate and the embossing roller.

[0017] Beneficial effects:

[0018] For the same product, only the flexographic printing plate with the largest width needs to be produced. By replacing the transfer roller with ink transfer surfaces of different widths, patterns of different widths can be printed without replacing the flexographic printing plate, thereby reducing the disposal of flexographic printing plates. In addition, although the patterns printed on different products are different, the standard specifications of the products are the same. Therefore, the printing roller group only needs to include several printing rollers of widths corresponding to the standard specifications of the products, which can be reused in the printing of any product. It has universality and reduces cost investment in the long run. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a single-plate multi-printing printing roller group used in Example 1 of the utility model;

[0020] Figure 2 This is a schematic diagram of a transfer roller group used in Embodiment 1 of the utility model;

[0021] Figure 3 This is a side view of a transfer roller assembly used in Embodiment 1 of the utility model;

[0022] Figure 4 This is a schematic diagram of a single-plate multi-printing printing roller group used in Example 2 of the present utility model;

[0023] Figure 5 This is a schematic diagram of a transfer roller group used in Embodiment 2 of the present utility model;

[0024] Figure 6 This is a side view of a transfer roller assembly used in Embodiment 2 of the present utility model;

[0025] Figure 7 This is a schematic diagram of the limiting component used in Example 2 of the utility model.

[0026] The above drawings include the following reference numerals:

[0027] 1. Anilox roller; 2. Transfer roller; 3. Roller shaft; 4. Transfer roller body; 5. Elastic contact layer; 6. Roller core; 7. Raised strip; 8. Limiting groove; 9. Limiting assembly; 10. First ring body; 11. Second ring body; 12. Chamber; 13. Printing roller; 14. First motor; 15. Second motor. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0029] Example 1

[0030] In the first aspect, the utility model provides a single-plate multi-printing roller set, see Figures 1 to 3 , including: an anilox roller 1, the anilox roller 1 is used for inking; a printing roller 13, a flexible printing plate is arranged on the roller surface of the printing roller 13; a transfer roller, the transfer roller is composed of a plurality of transfer rollers, a transfer roller 2 of the transfer rollers is arranged between the anilox roller 1 and the printing roller 13, and the ink on the roller body of the anilox roller 1 is transferred to the flexible printing plate on the roller surface of the printing roller 13 through the transfer roller 2, wherein the transfer roller bodies 4 of the plurality of transfer rollers 2 have ink transfer surfaces of different widths on their surfaces, and the widths of the ink transfer surfaces of the plurality of transfer rollers 2 are less than or equal to the widths of the flexible printing plates on the roller surface of the printing roller 13.

[0031] It should be noted that for the same product, only the flexible printing plate with the largest width needs to be produced. By replacing the transfer roller 2 with ink transfer surfaces of different widths, pattern printing of different widths can be achieved. There is no need to replace the flexible printing plate, thereby reducing the disposal of flexible printing plates. In addition, although the patterns printed on different products are different, the standard specifications of the products are the same. Therefore, the printing roller 13 group only needs to include several printing rollers 13 with widths corresponding to the standard specifications of the products, which can be reused in the printing of any product. It has universality and reduces cost investment in the long run.

[0032] In the single-plate multi-printing roller set of this embodiment, the transfer roller body 4 of the transfer roller 2 includes a roller core 6 and an elastic contact layer 5 which are arranged in sequence from the inside to the outside, and the ink transfer surface is arranged on the elastic contact layer 5 .

[0033] It should be noted that, on the one hand, the elastic contact layer 5 can better cooperate with the flexible printing plate, fit the curved and irregular surfaces of the flexible printing plate, transfer ink evenly and stably, ensure full coverage of the ink, and thus ensure a clear printed pattern; on the other hand, it can reduce the wear on the flexible printing plate and ensure the consistency of the printed pattern.

[0034] In the single-plate multi-printing roller set of this embodiment, the elastic contact layer 5 is made of polyurethane, rubber or chloroprene rubber.

[0035] It should be noted that polyurethane, rubber and chloroprene rubber can all provide good elasticity. Polyurethane material is suitable for various printing processes, especially printing processes with high requirements for solvent resistance and oil resistance. It can provide stable ink transfer performance and printing accuracy, and has a long service life. In addition, it also has good anti-aging performance and can maintain good performance after long-term use; rubber material is suitable for most conventional printing processes, such as printing of materials such as paper, cardboard, and plastic film. It can provide good ink transfer performance and printing accuracy, and has a long service life; chloroprene rubber material has good oil resistance, chemical corrosion resistance and certain aging resistance, and the price is relatively economical, but the elasticity is slightly lower than that of polyurethane and rubber materials. Those skilled in the art can choose according to actual conditions.

[0036] In the single-plate multi-printing roller set of this embodiment, the elastic contact layer 5 is made of EPDM rubber.

[0037] It should be noted that EPDM rubber is a saturated polymer with very good aging resistance, good weather resistance, excellent electrical insulation performance, good chemical corrosion resistance, and good impact elasticity. EPDM rubber is a rubber with a relatively low density of 0.87. In addition, it can be filled with a large amount of oil and fillers, which can reduce the cost of rubber products and make up for the high price of EPDM raw rubber. In addition, the physical and mechanical properties are not greatly reduced after filling.

[0038] In the single-plate multi-printing roller group of the present embodiment, the transfer roller includes: a first transfer roller 2 and a second printing roller 13, the width of the ink transfer surface on the first transfer roller 2 is equal to the width of the flexible printing plate on the roller surface of the printing roller 13; the width of the ink transfer surface of the second transfer roller 2 is not less than 1 / 3 of the width of the flexible printing plate on the roller surface of the printing roller 13.

[0039] In the single-plate multi-printing roller set of this embodiment, the transfer roller body 4 of the nth transfer roller 2 in the transfer roller has a length l n (Unit: m) is: l n =L-0.2n, and l n >0.2m, where L is the width of the flexographic printing plate.

[0040] Specifically, in the single-plate multi-printing roller group of the present embodiment, the lengths of the transfer roller bodies 4 of the multiple transfer rollers 2 are 1.3m, 1.5m, 1.7m, 1.9m, 2.1m and 2.3m respectively, which are common surface paper printing dimensions of corrugated cardboard. The printing roller 13 with the transfer roller body 4 of the above dimensions can meet most printing needs, thereby improving the versatility of the printing roller 13 group.

[0041] In the single-plate multi-printing roller group of the present embodiment, the printing roller 13 is connected to the output end of the first motor 14, and the transfer roller 2 is connected to the output end of the second motor 15; when the printing operation is performed, the first motor 14 is running, and the printing roller 13 acts as an active roller to drive the transfer roller 2 and the anilox roller 1 to rotate; after the printing operation is stopped, the printing roller 13 is disconnected from the transfer roller 2, the first motor 14 is stopped, and the second motor 15 is run, and the transfer roller 2 acts as an active roller to drive the anilox roller 1 to rotate.

[0042] It should be noted that after the printing operation is stopped, the printing roller 13 is disconnected from the transfer roller 2. In order to prevent the ink on the anilox roller 1 and the transfer roller 2 from drying and affecting subsequent use, the second motor 15 drives the transfer roller 2 to rotate, and then drives the anilox roller 1 to rotate, to ensure smooth operation when the next start-up. Preferably, since the printing roller 13 is disconnected from the transfer roller 2 after the printing operation is stopped, the load of the second motor 15 is small, and a motor with smaller power can be selected as the second motor 15 to further reduce costs.

[0043] Example 2

[0044] In order to further reduce the replacement cost, in the single-plate multi-printing roller set of this embodiment, please refer to Figures 4 to 7 The transfer roller 2 also includes a roller shaft 3, a roller core 6 is detachably sleeved on the roller shaft 3, a convex strip 7 extending along the length direction of the roller shaft 3 is provided on the surface of the roller shaft 3, and a limiting groove 8 is provided on the roller core 6 for the convex strip 7 to pass through.

[0045] It should be noted that the transfer roller 2 is replaced by replacing the transfer roller body 4, and the convex strip 7 on the roller shaft 3 cooperates with the limiting groove 8 on the roller core 6 to limit the axial rotation of the transfer roller body 4 on the roller shaft 3. The roller shaft 3 and the transfer roller body 4 of the transfer roller 2 are detachably connected. When preparing the transfer roller, only one roller shaft 3 can be prepared and used in conjunction with multiple transfer roller bodies 4, thereby further reducing printing costs.

[0046] In the single-plate multi-printing roller set of this embodiment, a plurality of convex strips 7 are provided, and the plurality of convex strips 7 are arranged along the circumference of the roller shaft 3 to improve the connection stability between the transfer roller body 4 and the roller shaft 3 .

[0047] In the single-plate multi-printing roller set of this embodiment, the transfer roller 2 further includes a limit assembly 9, which is detachably connected to the roller shaft 3. When in use, the limit assembly 9 is installed at both ends of the transfer roller body 4 to limit the axial movement of the transfer roller body 4, to prevent the transfer roller body 4 and the roller shaft 3 from being displaced when the transfer roller 2 rotates, thereby affecting the printing quality. The limit assembly 9 is detachably connected to the roller shaft 3, and the installation position of the limit assembly 9 is adjustable, so as to facilitate the fixation of transfer roller bodies with ink transfer surfaces of different widths.

[0048] In the single-plate multi-print roller set of this embodiment, please refer to Figure 7 The limiting assembly 9 includes: a first ring body 10 and a second ring body 11, one end of the first ring body 10 is hinged to the second ring body 11, and the other end of the first ring body 10 is provided with a through hole for the fastener to pass through, and the fastener sequentially penetrates the first ring body 10 and the second ring body 11, so that the first ring body 10 and the second ring body 11 are connected to form a chamber 12 for accommodating the roller shaft 3. In short, the limiting assembly 9 is fixed to the roller shaft 3 in the form of a jacket, and the fastener sequentially penetrates the first ring body 10 and the second ring body 11 to achieve the clamping of the jacket, without opening a hole on the roller shaft 3, and has no effect on the strength of the roller shaft 3.

[0049] The first ring body 10 and / or the second ring body 11 are made of elastic material, and the diameter of the cavity 12 is not greater than the outer diameter of the roller shaft 3 .

[0050] It should be noted that the diameter of the chamber 12 is not larger than the outer diameter of the roller 3, and the first ring body 10 and / or the second ring body 11 are made of elastic material. When the limiting assembly 9 is installed to the roller 3, the first ring body 10 and / or the second ring body 11 are deformed to press the roller 3, thereby improving the limiting performance of the limiting assembly 9.

[0051] In a second aspect, the utility model provides a single-plate multi-print printing device, comprising the above-mentioned single-plate multi-print roller group. When the single-plate multi-print printing device is in working state, the printing material passes between the flexible printing plate and the transfer roller 2.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0053] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0054] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0055] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0056] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A single-plate multi-printing roller set, characterized in that: include: An anilox roller, the anilox roller is used for inking; A printing roller, wherein a flexible printing plate is arranged on the roller surface of the printing roller; A transfer roller group, wherein the transfer roller group is composed of a plurality of transfer rollers, wherein a transfer roller in the transfer roller group is arranged between the anilox roller and the printing roller, and the ink on the anilox roller body is transferred to the flexible printing plate on the surface of the printing roller body through the transfer roller, wherein the transfer roller bodies of the plurality of transfer rollers are provided with ink transfer surfaces of different widths respectively, and the width of the ink transfer surfaces of the plurality of transfer rollers is less than or equal to the width of the flexible printing plate on the surface of the printing roller body.

2. The single-plate multi-printing roller set according to claim 1, characterized in that: The transfer roller body of the transfer roller comprises a roller core and an elastic contact layer which are arranged in sequence from the inside to the outside, and the ink transfer surface is arranged on the elastic contact layer.

3. The single-plate multi-printing roller set according to claim 2, characterized in that: The elastic contact layer is made of polyurethane, rubber or chloroprene rubber.

4. The single-plate multi-printing roller assembly according to claim 3, characterized in that: The elastic contact layer is made of EPDM rubber.

5. The single-plate multi-printing roller assembly according to claim 1, characterized in that: The transfer roller group includes: a first transfer roller, wherein the width of the ink transfer surface on the first transfer roller is equal to the width of the flexible printing plate on the roller surface of the printing roller; A second transfer roller, wherein the width of the ink transfer surface of the second transfer roller is not less than 1 / 3 of the width of the flexible printing plate on the roller surface of the printing roller.

6. The single-plate multi-printing roller assembly according to claim 1, characterized in that: The transfer roller body length l of the nth transfer roller in the transfer roller group n For: n =L-0.2n, and l n >0.2m, where L is the width of the flexographic printing plate.

7. The single-plate multi-printing roller assembly according to any one of claims 1 to 6, characterized in that: The printing roller is connected to the output end of the first motor, and the transfer roller is connected to the output end of the second motor; During printing, the first motor runs, and the printing roller acts as an active roller to drive the transfer roller and the anilox roller to rotate; during non-printing, the first motor stops, the second motor runs, and the transfer roller acts as an active roller to drive the anilox roller to rotate.

8. The single-plate multi-printing roller assembly according to claim 2, characterized in that: The transfer roller also includes a roller shaft, the roller core is detachably sleeved on the roller shaft, a convex strip extending along the length direction of the roller shaft is provided on the surface of the roller shaft, and a limiting groove for the convex strip to pass through is provided on the roller core.

9. The single-plate multi-printing roller assembly according to claim 8, characterized in that: The transfer roller further comprises a limiting assembly, which is detachably connected to the roller shaft. When in use, the limiting assembly is installed at both ends of the transfer roller body to limit the axial movement of the transfer roller body.

10. A single-plate multiple-print printing device, characterized in that: It comprises an embossing roller and the single-plate multi-printing roller group as described in any one of claims 1 to 9, wherein the embossing roller is transmission-connected to the printing roller, and when the single-plate multi-printing printing device is in working state, the printing material passes between the flexible printing plate and the embossing roller.

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