Offset printing color density detection device

Abstract

The utility model discloses an offset printing color density detection device, which belongs to the technical field of color density detection and comprises a machine body, a controller, a marking device and an emergency stop device. A conveying mechanism is arranged in the machine body and used for conveying printed products, an image collecting device used for detecting the color density of the printed products is arranged in the machine body, and the controller is connected with the input end of the image collecting device. The controller is used for collecting signals of the image collecting device to control the marking device to act, the marking device is connected with the output end of the controller, problems in printed matter can be found in time and marked so that follow-up searching can be facilitated, meanwhile, when batch of unqualified printed matter appears, the machine can be stopped in time, and the production efficiency is improved. And timely correction by personnel is facilitated, production efficiency is improved, and waste products are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of color density detection, in particular to an offset printing color density detection device. Background Art

[0002] During the offset printing process, color density is affected by factors such as ink quality and printing pressure. The accuracy of color density is crucial to the quality of printed products. If the color density is inaccurate, it may cause inconsistent color and color difference in printed products. During the offset printing process, color density detection can determine the color quality and consistency of printed products to ensure that the color of the printed products meets the design requirements and customer expectations. It can also help printing plants monitor printing quality, promptly detect and adjust color deviations, and ensure the color consistency and accuracy of printed products.

[0003] At present, color density detection in offset printing usually requires the help of professional instruments and personnel. These instruments are generally manually operated offline for detection, and there are errors caused by human operation. In addition, since the printing speed of the offset printing machine is relatively fast, manual detection can only be carried out at regular intervals. Not only is the workload large, but once unqualified products are detected manually, it is too late to stop the machine for adjustment. It is impossible to prevent the occurrence of batches of unqualified products, which will not only cause waste, but also affect the efficiency of offset printing. Utility Model Content

[0004] The embodiment of the utility model provides an offset printing color density detection device to solve the above-mentioned technical problems.

[0005] The utility model embodiment adopts the following technical scheme: including a machine body, a controller, a marking device and an emergency stop device; a conveying mechanism is arranged inside the machine body, the conveying mechanism is used to convey printed products, and an image acquisition device for detecting the color density of printed products is arranged inside the machine body, the controller is connected to the input end of the image acquisition device, the controller is used to acquire the signal of the image acquisition device to control the action of the marking device, the marking device is connected to the output end of the controller, and is used to mark the printed products, the emergency stop device is connected to the output end of the controller, when the controller acquires the signal of the marking device detecting multiple marking actions within a certain period of time, the emergency stop device is controlled to start, the acquisition signal of the image acquisition device is received by the controller, and the marking device is controlled to act after analyzing the unqualified images in the acquisition signal, the printed products are marked to facilitate later search and processing, and when batch quality problems occur, the emergency stop device is started to avoid the appearance of more unqualified products.

[0006] Furthermore, it also includes a timing device and a speed sensor. The speed sensor is arranged on the conveying mechanism and is used to detect the conveying speed. The output end of the timing device is connected to the input end of the controller. Through the cooperation of the timing device and the speed sensor, the time for the defective product to move from under the image acquisition device to under the marking device is calculated, so that the marking device is located exactly on the upper end of the detected defective product when performing the marking action.

[0007] Furthermore, an alarm device is provided on the machine body, and the alarm device is electrically connected to the controller. When defective products appear in a batch, the controller controls the alarm device to sound an alarm to prompt personnel.

[0008] Furthermore, the image acquisition device and the marking device are both connected to the inner top wall of the machine body, and the acquisition end of the image acquisition device and the output end of the marking device are both located directly above the conveying mechanism to facilitate color density detection of printed products and marking of the surface of defective products.

[0009] Furthermore, the marking device is located at one end of the machine body close to the output port. After the marking device marks the defective products, it is convenient to take out the defective products through the output port for inspection.

[0010] Furthermore, the conveying mechanism includes a conveying roller and a conveying belt drivingly connected to the conveying roller. The speed sensor is installed on the conveying roller, and the speed sensor can rotate synchronously with the conveying roller to detect the conveying speed.

[0011] At least one of the above technical solutions adopted in the embodiment of the utility model can achieve the following beneficial effects:

[0012] In the utility model, after receiving the signal of the unqualified product collected by the image acquisition device through the controller, the marking device is controlled to operate to mark the unqualified product so that the subsequent staff can search for the unqualified product. At the same time, when the controller receives that the marking device performs continuous marking action within a certain period of time, it indicates that a batch of unqualified products have appeared at this time. The controller controls the emergency stop device to start, and at the same time, an alarm is issued through the alarm device to prompt the personnel to avoid the waste caused by the continued production of unqualified products, so as to facilitate the personnel to make timely adjustments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 3 The principle frame of the utility model Figure 1 ;

[0017] Figure 4 The principle frame of the utility model Figure 2 ;

[0018] Figure 5 The principle frame of the utility model Figure 3 ;

[0019] Figure 6 The principle frame of the utility model Figure 4 ;

[0020] Figure 7 This is a location distribution diagram of the collection area and the detection area of ​​the utility model.

[0021] Reference numerals

[0022] Machine body 1, image acquisition device 2, controller 3, marking device 4, emergency stop device 5, timing device 6, speed sensor 7, alarm device 8, conveying roller 9, conveying belt 91. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in combination with the specific embodiments of the utility model and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0025] The embodiment of the utility model provides an offset printing color density detection device, including a body 1, a controller 3, a marking device 4 and an emergency stop device 5. A conveying mechanism is arranged inside the body 1, and the conveying mechanism is used to convey printed products. The conveying mechanism includes a conveying roller 9 and a conveyor belt 91 connected to the conveying roller 9, and also includes a driving member such as a motor for driving the conveying roller 9 to rotate, so as to realize the conveyance of printed products. An image acquisition device 2 for detecting the color density of printed products is arranged inside the body 1, and the image acquisition device 2 can be an instrument such as a color density detector;

[0026] By irradiating a printed product with light of a specific wavelength and then measuring the degree of absorption of the light by the printed product, the color density can be determined by calculating the absorption value of the printed product. This device is a prior art and will not be described in detail here. The controller 3 is connected to the input end of the image acquisition device 2. The controller 3 is used to collect the signal of the image acquisition device 2 to control the action of the marking device 4. The marking device 4 is connected to the output end of the controller 3 to mark the printed product. After the image acquisition device 2 detects an unqualified product, it will transmit a signal to the controller 3. The controller 3 controls the action of the marking device 4 according to the received signal to mark the unqualified product on the transmission mechanism. The unqualified products are marked for subsequent search and processing, wherein the marking device 4 can be an inkjet printer or a labeling machine, etc., and a label is affixed on the surface of the unqualified products for easy removal later. After the inkjet printer sprays the pattern on the surface of the unqualified products, it is difficult to clean up later, and even the printed products may be damaged. Therefore, in this scheme, the marking device 4 preferably adopts a labeling machine, and the emergency stop device 5 is connected to the output end of the controller 3. When the controller 3 collects the marking action signal of the marking device 4 for multiple times within a certain period of time, it indicates that a batch of unqualified products appear at this time. The controller 3 controls the emergency stop device 5 to start to avoid the continued transmission of unqualified products and reduce the amount of waste.

[0027] Preferably, an alarm device 8 is provided on the machine body 1, and the alarm device 8 is electrically connected to the controller 3. When the controller 3 detects that the marking device 4 performs marking actions for multiple consecutive times, the emergency stop device 5 is used to shut down the machine and the alarm device 8 is activated to sound an alarm to remind the staff. The alarm device 8 can be a buzzer that can emit an alarm sound or a warning light that emits bright light, or a mechanism that can emit both bright light and sound at the same time, which can be selected according to different usage requirements at the site of use.

[0028] Preferably, the image acquisition device 2 and the marking device 4 are both connected to the inner top wall of the body 1, and the acquisition end of the image acquisition device 2 and the output end of the marking device 4 are both located directly above the conveying mechanism, so that the acquisition end can perform image acquisition detection on the surface of the printed matter and mark the surface of unqualified products.

[0029] Preferably, the marking device 4 is located at one end of the machine body 1 near the output port. When defective products appear and the machine is shut down, personnel can take out the marked defective products inside the machine body 1 at a position near the output port.

[0030] Preferably, the timing device 6 and the speed sensor 7 are also included. The speed sensor 7 is arranged on the conveying roller 9 on the conveying mechanism. The speed sensor 7 can be a wheel speed sensor. The conveying speed is determined according to the rotation speed of the conveying roller 9. The output end of the timing device 6 is connected to the input end of the controller 3. Figure 7As shown, when the product enters the collection area, the image collection device 2 collects the product image, and as the conveying mechanism continues to convey the product, the product will enter the detection area, and the speed sensor 7 calculates the movement speed of the conveying device, and cooperates with the timing device 6 to calculate the time required for the product to enter the detection area, and calculates the time when the product arrives under the marking device 4 based on this time to facilitate marking the product;

[0031] Among them, refer to the attached Figure 7 As shown, A is the acquisition area, that is, the position directly below the image acquisition device 2; B is the detection area, that is, the position between the image acquisition device 2 and the marking device 4.

[0032] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. An offset printing color density detection device, characterized in that: include, A machine body (1), wherein a conveying mechanism is provided inside the machine body (1), wherein the conveying mechanism is used to convey printed products, and wherein an image acquisition device (2) is provided inside the machine body (1) for detecting the color density of the printed products; A controller (3), the controller (3) being connected to an input end of the image acquisition device (2), and the controller (3) being used to acquire a signal from the image acquisition device (2) to control the action of the marking device (4); A marking device (4), the marking device (4) being connected to an output end of the controller (3) and being used for marking printed products; An emergency stop device (5) is connected to the output end of the controller (3). When the controller (3) collects a signal that the marking device (4) performs marking actions multiple times within a certain period of time, the emergency stop device (5) is controlled to start.

2. The offset printing color density detection device according to claim 1, characterized in that: It also includes a timing device (6) and a speed sensor (7). The speed sensor (7) is arranged on the conveying mechanism and is used to detect the conveying speed. The output end of the timing device (6) is connected to the input end of the controller (3).

3. The offset printing color density detection device according to claim 1, characterized in that: The machine body (1) is provided with an alarm device (8), and the alarm device (8) is electrically connected to the controller (3).

4. The offset printing color density detection device according to claim 1, characterized in that: The image acquisition device (2) and the marking device (4) are both connected to the inner top wall of the machine body (1), and the acquisition end of the image acquisition device (2) and the output end of the marking device (4) are both located directly above the transmission mechanism.

5. The offset printing color density detection device according to claim 1, characterized in that: The marking device (4) is located at one end of the machine body (1) close to the output port.

6. The offset printing color density detection device according to claim 2, characterized in that: The conveying mechanism comprises a conveying roller (9) and a conveying belt (91) drivingly connected to the conveying roller (9), and the speed sensor (7) is mounted on the conveying roller (9).

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