Four-color overprinting on-line monitoring and adjusting device of ink-jet printer

Abstract

The utility model relates to the technical field of four-color overprinting monitoring of ink-jet printers, and discloses a four-color overprinting on-line monitoring and adjusting device of an ink-jet printer, which comprises a casing, and two groups of monitoring racks are arranged on the casing and are respectively provided with a back surface monitoring assembly and a front surface monitoring assembly. The back assembly comprises a back detection camera, a back overprinting camera and a back color code detection sensor. The front assembly comprises a front detection camera, a front overprinting camera and a front color code detection sensor. The back and front monitoring assemblies on the two monitoring racks can monitor four-color overprinting on the front and back of the paper on line at the same time, and accuracy and consistency are ensured. The back and front detection cameras capture images in real time, and the back and front overprinting cameras recognize overprinting marks, judge concentricity and determine the deviation degree. The back color code detection sensor and the front color code detection sensor detect black marks and trigger the overprinting camera to work, and automatic monitoring and adjusting are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of four-color overprint monitoring for inkjet printers, in particular to an online monitoring and adjusting device for four-color overprinting for inkjet printers. Background Art

[0002] According to the working principle of color inkjet printers, different colors are mixed in different proportions by using four basic colors: K (black), C (cyan), M (magenta), and Y (yellow). Rich color expression is achieved through precise overprinting technology. In existing inkjet printing technology, the print head is responsible for accurately spraying ink droplets onto the surface of paper to form the desired image. Since most print heads can only spray a single color, ensuring that print heads of different colors can accurately spray their respective colors of ink to the same position to achieve four-color registration is the key to precise color control.

[0003] At present, most inkjet printers use a method of fixing the delay parameters of each color nozzle for registration. This method cannot adjust the registration parameters in real time during the printing process. In addition, the differences in the ink absorption, surface roughness and other characteristics of different papers will also cause changes in the four-color registration parameters. Therefore, when changing paper or performing dynamic printing, the existing registration adjustment method still has certain limitations and needs to be further optimized and improved.

[0004] Therefore, based on the above technical problems, it is necessary for technicians in this field to develop an online monitoring and adjustment device for four-color overprinting of an inkjet printer. Utility Model Content

[0005] The utility model aims to provide an on-line monitoring and adjusting device for four-color overprinting of an inkjet printer to solve the problems raised in the above-mentioned background technology.

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

[0007] A technical solution for an online monitoring and adjustment device for four-color overprinting of an inkjet printer, comprising a casing, on which two groups of monitoring frames are arranged, on which a back monitoring component and a front monitoring component are respectively installed, the back monitoring component comprising a back detection camera, below which a back overprint camera is arranged, and below which a back color mark detection sensor is arranged, the front monitoring component comprising a front detection camera, below which a front overprint camera is arranged, and below which a front color mark detection sensor is arranged.

[0008] As a preferred technical solution, a back roller assembly is arranged in the housing below the back monitoring assembly, and a back encoder pressure wheel is arranged on an adjacent side of the back roller assembly.

[0009] As a preferred technical solution, a front roller assembly is arranged in a housing below the front monitoring assembly, and a front encoder pressure wheel is arranged on an adjacent side of the front roller assembly.

[0010] As a preferred technical solution, the front color mark detection sensor and the back color mark detection sensor are used to detect the black mark on the paper and trigger the back overprint camera and the front overprint camera to identify the overprint mark. The overprint mark consists of a black outer ring and solid inner circles of C, M, and Y. The concentricity is used to judge the degree of overprint deviation.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] (1) The utility model is an online monitoring and adjustment device for four-color overprinting of an inkjet printer. The back monitoring components and front monitoring components on the two sets of monitoring frames can simultaneously perform online monitoring of the four-color overprinting on the front and back of the paper to ensure the accuracy and consistency of the four-color overprinting. The back detection camera and the front detection camera can capture the image of the paper in real time, and the back overprint camera and the front overprint camera are responsible for identifying the overprint mark and determining the degree of overprint deviation by judging the concentricity of the overprint mark. The back color mark detection sensor and the front color mark detection sensor are used to detect the black mark on the paper, thereby triggering the operation of the back overprint camera and the front overprint camera to achieve automatic monitoring and adjustment.

[0013] (2) The utility model is an online monitoring and adjustment device for four-color overprinting of an inkjet printer. The arrangement of the back roller assembly and the front roller assembly can ensure the stability and accuracy of the paper during the transmission process and improve the accuracy of overprinting monitoring. The back encoder pressure wheel and the front encoder pressure wheel are used to monitor the transmission speed and position of the paper, providing accurate data support for online monitoring. The utility model not only realizes the online monitoring of the four-color overprinting of the inkjet printer, but also can adjust the overprinting parameters in real time, improve the accuracy and consistency of overprinting, and is suitable for various paper types and printing scenarios, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of an online monitoring and adjustment device for four-color overprinting of an inkjet printer;

[0015] Figure 2 The present invention is a schematic diagram of the detection mark structure of an online monitoring and adjustment device for four-color overprinting of an inkjet printer.

[0016] In the accompanying drawings: 1, housing; 11, monitoring frame; 21, back detection camera; 22, back color mark detection sensor; 23, back overprint camera; 24, back roller assembly; 25, back encoder pressure wheel; 31, front detection camera; 32, front color mark detection sensor; 33, front overprint camera; 34, front roller assembly; 35, front encoder pressure wheel; 41, black outer ring; 42, solid inner circle. DETAILED DESCRIPTION

[0017] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present invention by illustrating examples of the present invention.

[0018] like Figure 1 and Figure 2 As shown, the utility model provides a technical solution for an online monitoring and adjustment device for four-color overprinting of an inkjet printer: it includes a casing 1, on which two groups of monitoring frames 11 are arranged, and the two groups of monitoring frames 11 are respectively installed with a back monitoring component and a front monitoring component, the back monitoring component includes a back detection camera 21, a back overprint camera 23 is arranged below the back detection camera 21, and a back color mark detection sensor 22 is arranged below the back overprint camera 23, the front monitoring component includes a front detection camera 31, a front overprint camera 33 is arranged below the front detection camera 31, and a front color mark detection sensor 32 is arranged below the front overprint camera 33. A back roller assembly 24 is arranged in the casing 1 below the back monitoring assembly, and a back encoder pressure wheel 25 is arranged on the adjacent side of the back roller assembly 24. A front roller assembly 34 is arranged in the casing 1 below the front monitoring assembly, and a front encoder pressure wheel 35 is arranged on the adjacent side of the front roller assembly 34. The front color mark detection sensor 32 and the back color mark detection sensor 22 are used to detect the black mark on the paper and trigger the back overprint camera 23 and the front overprint camera 33 to identify the overprint mark. The overprint mark consists of a black outer ring 41 and a solid inner circle 42 of three colors C, M, and Y. The concentricity is used to judge the degree of overprint deviation.

[0019] Specifically, the back monitoring components and the front monitoring components on the two monitoring frames 11 can work together in real time to ensure accurate monitoring of each overprinting link of the paper. During the inkjet printing process, the paper passes through the monitoring frame 11 under the guidance of the front roller assembly and the back roller assembly. The front detection camera 31 and the back detection camera 21 capture the image of the paper at a high frame rate and transmit the data to the processing unit for analysis in real time.

[0020] When the front color mark detection sensor 32 and the back color mark detection sensor 22 detect the black mark on the paper, the front overprint camera 33 and the back overprint camera 23 will be immediately triggered to identify the overprint mark. These overprint marks are composed of a black outer ring 41 and a solid inner circle 42 of three colors C, M, and Y. Their concentricity is a key indicator for determining whether the overprint is accurate.

[0021] After receiving the image of the overprint mark, the processing unit will use advanced image processing algorithms to accurately analyze the image. By comparing the center position of the black outer ring and the solid circles of the three colors C, M, and Y, the degree of overprint deviation can be accurately determined. If a deviation in overprint is found, the processing unit will immediately calculate the adjustment parameters and send these parameters to the control system of the inkjet printer.

[0022] After receiving the adjustment parameters, the control system of the inkjet printer will automatically adjust the position and angle of the inkjet head according to these parameters to ensure the accuracy and consistency of the next overprint. This automatic adjustment mechanism not only greatly improves the accuracy of overprinting, but also significantly reduces the need for manual intervention and improves production efficiency.

[0023] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0026] According to the embodiments of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the present invention to specific embodiments. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that technicians in the relevant technical field can make good use of the present invention and the modified use based on the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An online monitoring and adjustment device for four-color overprinting of an inkjet printer, characterized in that: The invention comprises a housing (1), wherein two groups of monitoring frames (11) are arranged on the housing (1), and a back monitoring component and a front monitoring component are respectively installed on the two groups of monitoring frames (11), wherein the back monitoring component comprises a back detection camera (21), wherein a back overprint camera (23) is arranged below the back detection camera (21), and wherein a back color mark detection sensor (22) is arranged below the back overprint camera (23), and wherein the front monitoring component comprises a front detection camera (31), wherein a front overprint camera (33) is arranged below the front detection camera (31), and wherein a front color mark detection sensor (32) is arranged below the front overprint camera (33).

2. The device for online monitoring and adjusting four-color overprinting of an inkjet printer according to claim 1, characterized in that: A back roller assembly (24) is arranged in the housing (1) below the back monitoring assembly, and a back encoder pressure wheel (25) is arranged adjacent to one side of the back roller assembly (24).

3. The device for online monitoring and adjusting four-color overprinting of an inkjet printer according to claim 1, characterized in that: A front roller assembly (34) is arranged in the housing (1) below the front monitoring assembly, and a front encoder pressure wheel (35) is arranged adjacent to one side of the front roller assembly (34).

4. The device for online monitoring and adjusting four-color overprinting of an inkjet printer according to claim 1, characterized in that: The front color mark detection sensor (32) and the back color mark detection sensor (22) are used to detect black marks on paper and trigger the back overprint camera (23) and the front overprint camera (33) to identify the overprint mark, which is composed of a black outer ring (41) and a solid inner circle (42) of three colors C, M and Y. The degree of deviation of the overprint is judged by using the concentricity.

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