A register assembly for printing and a flexographic printing press

Abstract

The utility model discloses a kind of printing register assembly and flexographic printing machine in printing register technical field, to solve the problem that resin printing plate surface is difficult to be identified register by camera in prior art. It includes first detection device, the first detection device is used to detect the color position on print, further include printing assembly, light source and second detection device, the printing assembly includes mounting bracket and printing roller rotationally arranged on mounting bracket, the surface of the printing roller is attached with flexible printing plate, the surface of printing roller side side is installed with color comparison ring, the color comparison ring is at least by two colors, the light source is used to provide illumination to color comparison ring surface, the second detection device is used to detect the color difference area of color comparison ring surface;The utility model is used for the register work of flexographic printing machine, accurate color difference can be provided for detection device to identify, realize accurate register, ensure the printing yield of product.

Description

Technical Field

[0001] This utility model relates to a registration component for printing and a flexographic printing machine, belonging to the field of printing registration technology. Background Technology

[0002] In flexographic printing, different colors need to be printed on the printed material step by step to form the desired pattern. To ensure that the flexible printing plates on different printing rollers are aligned with the upper pattern during printing, registration is required to correct the printing position of the rear printing rollers. After color printing, a layer of transparent varnish is reprinted to protect the printed pattern. When printing the transparent varnish, it also needs to correspond with the previous colors to achieve registration. However, currently, during the registration process of the transparent varnish printing plate, because the varnish coating material itself is transparent, it is difficult to perform positioning and identification during registration. This leads to unstable registration of the last layer of transparent varnish, resulting in low yield of printed products. In order to ensure yield, excessive resin material may be consumed. Summary of the Invention

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a registration component and flexographic printing machine for printing, which is used for registration work of flexographic printing machine, can provide accurate color difference for detection device to identify, achieve accurate registration, and ensure the printing yield of products.

[0004] To achieve the above objectives, this utility model employs the following technical solution:

[0005] This utility model provides a registration assembly for printing, including a first detection device for detecting the color on the printed matter, a printing assembly, a light source, and a second detection device. The printing assembly includes a mounting frame and a printing roller rotatably mounted on the mounting frame. A flexible printing plate is attached to the surface of the printing roller, and a color matching ring is installed on the side surface of the printing roller. The color matching ring is composed of at least two colors. The light source is used to provide illumination to the surface of the color matching ring, and the second detection device is used to detect color difference areas on the surface of the color matching ring.

[0006] Specifically, the surface of the printing roller is provided with an installation groove, and the color matching ring is formed by splicing two semi-circular ring-shaped splices on the installation groove. The outer diameter of the color matching ring is not greater than the outer diameter of the printing roller.

[0007] Specifically, a positioning block is provided at the location of the printing roller mounting groove, and the two semi-circular splice bodies are installed on the positioning block.

[0008] Specifically, the colorimetric ring is made of one of matte plastic, matte polycarbonate, or frosted acrylic.

[0009] Specifically, the color matching ring includes a connector and multiple color blocks fixedly disposed on the surface of the connector. The connector is fixedly disposed on the mounting groove. The multiple color blocks have different lengths and there is a significant color difference between any two adjacent color blocks.

[0010] Specifically, the printing roller surface is provided with multiple continuous reflective grooves on the side of the mounting groove. The surface of the printing roller located at the reflective groove position is used to reflect the light from the light source to the side away from the mounting groove. There is no vertical reflection area of ​​light on the surface of the printing roller located in the reflective groove section.

[0011] Specifically, the surface of the printing roller is also provided with a flexible plate placement groove, and the flexible plate placement groove is provided with at least one retaining edge for positioning the flexible printing plate.

[0012] Specifically, the mounting bracket is also connected to a positioning rod, and a positioning section is slidably mounted on the positioning rod. The positioning section is used to match the two sides of the flexible plate placement slot.

[0013] Specifically, it also includes a positioning frame, on which an installation strip is slidably mounted. The second detection device and the light source are both mounted on the installation strip. The positioning frame is provided with a clamping plate, and the installation strip passes through the middle of the clamping plate. The clamping plate is provided with locking bolts for positioning the installation strip.

[0014] The present invention provides a flexographic printing machine, including the registration assembly for printing as described in any one of the above-mentioned claims.

[0015] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0016] This invention installs additional color matching rings on the surface of the roller. By setting color differences between the color matching rings, different color difference areas can be detected by a second detection device when the printing roller rotates. This eliminates the need for adjustments on the flexible printing plate body, making it convenient to accurately determine the current position of the printing roller and providing an accurate reference for the adjustment of the printing roller, thereby ensuring the yield of the product. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the registration component provided in this embodiment of the utility model;

[0018] Figure 2 This is a side view of the registration component provided in this embodiment of the utility model;

[0019] Figure 3 This is a utility model Figure 2A cross-sectional view of the registration assembly provided in the embodiment along the AA direction;

[0020] Figure 4 This is a front view of the registration component provided in this embodiment of the utility model;

[0021] Figure 5 This is a utility model Figure 4 A cross-sectional view of the registration assembly provided in the embodiment along the BB direction;

[0022] Reference numerals: 1. Mounting frame; 2. Printing roller; 3. Positioning frame; 4. Second detection device; 5. Color matching ring; 501. Connector; 502. Color block; 6. Light source; 7. Reflector groove; 8. Flexible board placement groove; 9. Positioning rod; 10. Positioning section; 11. Mounting strip; 12. Clamping plate. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example:

[0026] This utility model provides a registration assembly for printing, used in the registration work of a flexographic printing press. It provides accurate color difference detection for identification, achieving precise registration and ensuring high printing yield. To achieve accurate registration, the structure includes a first detection device to detect the color position on the printed material, facilitating matching with the position of the printing roller 2 for registration. To further facilitate the detection of the printing roller 2's position, the assembly also includes a printing component, a light source 6, and a second detection device 4. The printing component includes a mounting frame 1 and a printing roller 2 rotatably mounted on the mounting frame 1. For flexographic printing, a flexible printing plate is attached to the surface of the printing roller 2 for adsorbing the image for printing. To detect the current position of the printing roller 2, a color matching ring 5 is installed on the side surface of the printing roller 2. Specifically, a color matching ring 5 is provided. The color ring 5 consists of at least two colors. The light source 6 is used to provide illumination to the surface of the color ring 5, allowing the surface of the color ring 5 to display its original color, avoiding poor detection in dim environments. The second detection device 4 is used to detect the color difference area on the surface of the color ring 5. By directly detecting the color difference area on the surface of the color ring 5 through the second detection device, the current position of the printing roller 2 can be determined, thereby determining the position of the flexible printing plate on the printing roller 2. Based on the current position, the phase and angle parameters of the printing roller 2 are finely adjusted to achieve accurate registration. This setting method does not require setting corresponding color block areas on the surface of the flexible printing plate, making it easier for the camera of the second detection device 4 to recognize. Moreover, after replacing the flexible printing plate, there is no need to reset the color block areas, which is convenient for maintenance and avoids the problem of inconvenient color difference areas on flexible printing plates (especially resin printing plates).

[0027] This utility model provides a printing registration component. To facilitate the installation of the nearly annular colorimetric ring 5 onto the printing roller 2, a mounting groove is provided on the surface of the printing roller 2. The colorimetric ring 5 is designed to be formed by two semi-circular interlocking bodies spliced ​​onto the mounting groove. This avoids the inability of the annular design to be directly fitted onto the printing roller 2. This method also reduces the protrusion height of the colorimetric ring 5 by setting the outer diameter of the colorimetric ring 5 to be no greater than the outer diameter of the printing roller 2, thereby avoiding any impact on the printed product during the printing process. To ensure that the colorimetric ring 5 does not rotate relative to the printing roller 2 after installation, and to avoid deviation between the detected and actual displacement, a positioning block is provided at the position of the mounting groove on the printing roller 2. The two semi-circular interlocking bodies are installed on the positioning block. Through the limiting effect of the positioning block, it is ensured that the position of the colorimetric ring 5 is relatively stationary with respect to the position of the flexible printing plate.

[0028] In this embodiment of the utility model, a registration component for printing is provided. To avoid the colorimeter ring 5 being too reflective and difficult for the camera to detect, the colorimeter ring 5 can be made of one of matte plastic, matte polycarbonate, or frosted acrylic.

[0029] This utility model provides a printing registration component, specifically a color matching ring 5. Specifically, the color matching ring 5 includes a connector 501 and multiple color blocks 502 fixedly disposed on the surface of the connector 501. The connector 501 is used to fix the component on the mounting groove, providing structural support. The multiple color blocks 502 have different lengths, and there is a significant color difference between any two adjacent color blocks 502. With this configuration, even after the effective color block area is rotated to the back of the camera, the phase state of the current printing roller 2 can still be determined. By designing the color blocks 502 to have different lengths, the position of the printing roller 2 can be determined without the camera needing to identify the color type; only the length of the abnormal area of ​​the color block 502 needs to be identified.

[0030] In this embodiment of the utility model, a registration component for printing is provided. To avoid glare caused by the metal material on the surface of the printing roller 2, which may lead to poor detection such as exposure by the camera, multiple continuous reflective grooves 7 are provided on the surface of the printing roller 2 and next to the mounting groove. The surface of the printing roller 2 located at the reflective groove 7 is used to reflect the light from the light source 6 to the side away from the mounting groove, so as to avoid the light source being directly reflected back to the camera and causing light pollution in the imaging result. At this time, the surface of the printing roller 2 located in the reflective groove 7 section should control the vertical reflection area where there is no light.

[0031] This utility model provides a printing registration assembly. To facilitate the alignment of the printing plate with the preset color block 502 area after changing the flexographic printing plate, a flexographic plate placement groove 8 is provided on the surface of the printing roller 2. At least one retaining edge is provided in the flexographic plate placement groove 8 for positioning the flexographic printing plate, thereby facilitating the accurate installation of the flexographic printing plate. To ensure the parallelism of the flexographic printing plate while it adheres to the surface of the printing roller 2, a positioning rod 9 can also be connected to the mounting frame 1, such as... Figure 1 As shown, a positioning section 10 is slidably installed on the positioning rod 9, and the positioning section 10 is set to match the two sides of the flexible plate placement groove 8. So that when installing the flexible printing plate, the two sides of the printing plate can be aligned with the positioning section 10, and the positioning section 10 can limit its position, thereby further improving the stability when mounting the plate.

[0032] This utility model provides a registration assembly for printing. Considering the need to easily adjust the position of the camera or light source 6 to adapt it to the optimal detection position of the colorimetric ring 5, the structure may also include a positioning frame 3. Specifically, the positioning frame 3 has a sliding mounting strip 11, such as... Figure 1As shown, the second detection device 4 and the light source 6 are both installed on the mounting strip 11. The positioning frame 3 is provided with a clamping plate 12. At this time, the mounting strip 11 passes through the middle of the clamping plate 12. Finally, the mounting strip 11 is positioned by a locking bolt on the clamping plate 12 for positioning the mounting strip 11, thereby facilitating manual calibration and adjustment of the detection position.

[0033] This utility model provides a flexographic printing machine, including any of the above-mentioned registration components for printing. By using the registration components, the final printed products can achieve accurate matching and overlap of the printing areas, ensuring both low resin utilization and product quality.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A registration assembly for printing, comprising a first detection device for detecting color on a printed material, characterized in that, It also includes a printing assembly, a light source (6) and a second detection device (4). The printing assembly includes a mounting frame (1) and a printing roller (2) rotatably mounted on the mounting frame (1). A flexible printing plate is attached to the surface of the printing roller (2). A color matching ring (5) is mounted on the side surface of the printing roller (2). The color matching ring (5) is composed of at least two colors. The light source (6) is used to provide illumination to the surface of the color matching ring (5). The second detection device (4) is used to detect the color difference area on the surface of the color matching ring (5).

2. The registration assembly for printing according to claim 1, characterized in that, The surface of the printing roller (2) is provided with an installation groove. The color matching ring (5) is composed of two semi-circular splicing bodies spliced ​​on the installation groove. The outer diameter of the color matching ring (5) is not greater than the outer diameter of the printing roller (2).

3. A registration assembly for printing according to claim 2, characterized in that, A positioning block is provided at the position of the mounting groove of the printing roller (2), and the two semi-circular splice bodies are installed on the positioning block.

4. A registration assembly for printing according to claim 2, characterized in that, The colorimetric ring (5) is made of one of the following materials: matte plastic, matte polycarbonate, or frosted acrylic.

5. A registration assembly for printing according to claim 2, characterized in that, The color matching ring (5) includes a connector (501) and multiple color blocks (502) fixedly disposed on the surface of the connector (501). The connector (501) is fixedly disposed on the mounting groove. The multiple color blocks (502) have different lengths and there is a significant color difference between any two adjacent color blocks (502).

6. A registration assembly for printing according to claim 2, characterized in that, The printing roller (2) has a plurality of continuous reflective grooves (7) on its surface and on the side of the mounting groove. The surface of the printing roller (2) located at the reflective groove (7) is used to reflect the light from the light source (6) to the side away from the mounting groove. There is no vertical reflection area of ​​light on the surface of the printing roller (2) located in the reflective groove (7) section.

7. A registration assembly for printing according to claim 1, characterized in that, The surface of the printing roller (2) is also provided with a flexible plate placement groove (8), and the flexible plate placement groove (8) is provided with at least one retaining edge for positioning the flexible printing plate.

8. A registration assembly for printing according to claim 7, characterized in that, The mounting bracket (1) is also connected to a positioning rod (9), and a positioning section (10) is slidably mounted on the positioning rod (9). The positioning section (10) is used to match the two sides of the flexible plate placement groove (8).

9. A registration assembly for printing according to claim 1, characterized in that, It also includes a positioning frame (3), on which an installation strip (11) is slidably arranged. The second detection device (4) and the light source (6) are both installed on the installation strip (11). A clamping plate (12) is provided on the positioning frame (3). The installation strip (11) passes through the middle of the clamping plate (12). The clamping plate (12) is provided with locking bolts for positioning the installation strip (11).

10. A flexographic printing press, characterized in that, Includes a registration component for printing as described in any one of claims 1 to 9.

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