A printing quality detection device for printed paper

Abstract

The utility model discloses a printing quality detection device for printing paper product, including lathe main part, spacing conveying component, directional conveying component, bottom surface shooting unit and top surface shooting unit. Spacing conveying component and directional conveying component are sequentially arranged on lathe main part. The utility model discloses through setting spacing conveying component, directional conveying component who sequentially arranges on lathe main part, wherein, spacing conveying component includes two interval arrangement's conveying unit, the interval area between two conveying units forms the shooting area that cooperates with bottom surface shooting unit, so that when the printing paper product of being measured is in the shooting area, its bottom surface pattern can be shot through bottom surface shooting unit. At the same time, directional conveying component cooperates top surface shooting unit and completes the top surface shooting of printing paper product of being measured, realizes the double -sided shooting in printing paper product transmission process of being measured, satisfies the detection demand of different customers to printing.

Description

Technical Field

[0001] This utility model belongs to the field of printing inspection technology, specifically relating to a printing quality inspection device for printed paper products. Background Technology

[0002] During the printing process, due to factors such as techniques, printed materials often exhibit color differences and misregistration, as well as defects such as ink residue, ink skimming, missing colors, and smudges. Consequently, some defective products are unavoidable in the production process. Traditional printing companies typically use manual methods to inspect the appearance of printed materials, either by sampling or by visually inspecting each product after printing. This method is inefficient, costly, labor-intensive, and produces poor quality.

[0003] In the existing technology, some inspection machines use conveyor belts and cameras to inspect the quality of the printed surface of printed materials. However, this has the following drawbacks: the surface quality inspection machines of existing inspection machines can only detect the quality of the printed surface facing up. They cannot detect quality problems on the back of the printed materials (such as damage, stains, etc.), which may result in the output finished products still having defects on the back, thus reducing the overall quality of the finished products. In particular, they cannot meet the inspection requirements of printed materials with strict requirements for the quality of the back side. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a printing quality inspection device for printed paper products, which solves the technical problem that existing printing product inspection machines are unable to inspect both sides of printed products simultaneously.

[0005] To achieve the above objectives, the specific technical solution of this utility model is as follows: A printing quality inspection device for printed paper products includes a machine tool body, a limiting conveyor assembly, a directional conveyor assembly, a bottom imaging unit, and a top imaging unit. The limiting conveyor assembly and the directional conveyor assembly are arranged sequentially on the machine tool body.

[0006] The limiting conveying assembly includes two spaced-apart conveying units; the gap between the two conveying units forms a shooting area that cooperates with the bottom shooting unit. The bottom shooting unit is installed at the bottom of the machine tool body, with its shooting end facing the shooting area.

[0007] The top-surface imaging unit is positioned on the conveying path of the directional conveying assembly and is used to image the top surface of the printed paper being tested, which is conveyed by the directional conveying assembly.

[0008] Furthermore, each of the conveying units includes a bag conveying assembly and a clamping conveying assembly. The bag conveying assembly and the clamping conveying assembly are arranged sequentially along the vertical direction, and the distance between the two conveying surfaces is equal to the thickness of the printed paper being measured.

[0009] Furthermore, both the bag conveying assembly and the clamping conveying assembly include a limiting conveying bracket, a first conveyor belt, a first drive motor, and multiple limiting conveying rollers. The limiting conveying bracket is fixed to the machine tool body. Each of the limiting conveying rollers is sequentially rotatably connected to the inner side of the limiting conveying bracket and is connected to each other via the first conveyor belt. The power output shaft of the first drive motor is connected to one of the limiting conveying rollers.

[0010] Furthermore, the directional conveying assembly includes a directional conveyor belt, a second drive motor, two directional conveying rollers, and a directional conveying support. The two conveying rollers are arranged at intervals on the directional conveying support and are rotatably connected to it. The two conveying rollers are connected by a directional conveyor belt. The second drive motor is mounted on the machine tool body, and its power output shaft is connected to one of the directional conveying rollers.

[0011] Furthermore, the directional conveying assembly also includes a suction assembly; multiple suction ports are formed on the surface of the directional conveyor belt. The suction assembly is disposed between two conveying surfaces of the directional conveyor belt and is used to work with each suction port to adsorb the printed paper being tested conveyed on the surface of the directional conveyor belt.

[0012] Furthermore, the suction assembly includes multiple suction pipes and an air pump. Each suction pipe is a circular tube open at one end and closed at the other. The suction pipes are spaced apart between the two conveying surfaces, with the distance between adjacent suction pipes being less than the length of the printed paper being tested. The open end of each suction pipe is connected to the air pump. Each suction pipe has multiple sequentially arranged air inlets on its surface.

[0013] Furthermore, both the bottom and top imaging units include a camera, a mounting bracket, and two lighting components. The camera is fixed to the machine tool body via the mounting bracket, with its imaging end facing the conveying surface of the directional conveying component or the imaging area of ​​the limiting conveying component. The two lighting components are symmetrically arranged on the machine tool body, with their illumination ends also facing the conveying surface of the directional conveying component or the imaging area of ​​the limiting conveying component.

[0014] Furthermore, the camera is a high-speed linear CCD color camera.

[0015] Furthermore, the lighting assembly includes a lamp, a lamp holder, and a holder base. The holder base is fixed to the machine tool body. The lamp holder is rotatably connected to the top of the holder base by screws. The lamp is fixed to the lamp holder.

[0016] Compared with the prior art, the present invention has the following advantages: This invention features a limiting conveyor assembly and a directional conveyor assembly arranged sequentially on the machine tool body. The limiting conveyor assembly includes two spaced-apart conveyor units; the space between the two units forms a shooting area that cooperates with the bottom-side shooting unit, allowing the bottom surface pattern of the printed paper being tested to be captured by the bottom-side shooting unit as it passes through the shooting area. Simultaneously, the directional conveyor assembly, in conjunction with the top-side shooting unit, completes the top-side shooting of the printed paper being tested, achieving double-sided shooting during the paper's transport process and meeting the diverse testing needs of different customers. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the relative positions of the limiting conveying component and the bottom shooting unit in this utility model; Figure 3 This is a schematic diagram of the limiting and conveying component in this utility model; Figure 4 This is a schematic diagram of the top-facing imaging unit in this utility model. Figure 1 (Enlarged view of part A in the middle section).

[0018] Reference numerals: 1. Machine tool body; 2. Limiting conveyor assembly; 3. Orienting conveyor assembly; 4. Bottom surface imaging unit; 5. Top surface imaging unit; 6. Bag conveyor assembly; 7. Clamping conveyor assembly; 8. First conveyor belt; 9. Orienting conveyor belt; 10. Camera; 11. Mounting bracket; 12. Illumination assembly. Detailed Implementation

[0019] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper side", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] like Figure 1 and 2As shown, a printing quality inspection device for printed paper products includes a machine tool body 1, a limiting conveying assembly 2, a directional conveying assembly 3, a bottom imaging unit 4, and a top imaging unit 5. The limiting conveying assembly 2 and the directional conveying assembly 3 are arranged sequentially on the machine tool body 1.

[0022] The limiting conveying assembly 2 includes two spaced-apart conveying units, each capable of clamping and conveying the two sides of the printed paper being tested. The space between the two conveying units forms a shooting area that cooperates with the bottom shooting unit 4. The bottom shooting unit 4 is installed at the bottom of the machine tool body 1 and is used to shoot the printed pattern on the bottom surface of the printed paper being tested as it passes through the shooting area.

[0023] The top-side imaging unit 5 is positioned on the conveying path of the directional conveying component 3 and is capable of imaging the printed pattern on the top surface of the printed paper being tested, which is conveyed by the directional conveying component 3.

[0024] like Figure 1 and 3 As shown, each conveying unit includes a bag conveying assembly 6 and a clamping conveying assembly 7. The bag conveying assembly 6 and the clamping conveying assembly 7 are arranged sequentially along the vertical direction, and the distance between the two conveying surfaces is equal to the thickness of the printed paper being tested, which can form a clamp on the edge of the printed paper being tested when it enters the input end.

[0025] In this embodiment, both the bag conveying assembly 6 and the clamping conveying assembly 7 include a limiting conveying bracket, a first conveyor belt 8, a first drive motor, and multiple limiting conveying rollers. The limiting conveying bracket is fixed to the machine tool body 1. Each limiting conveying roller is sequentially rotatably connected to the inner side of the limiting conveying bracket and is connected to each other via the first conveyor belt 8. The power output shaft of the first drive motor is connected to one of the limiting conveying rollers. During operation, the power output shaft of the first drive motor rotates, driving the corresponding limiting conveying roller to rotate, thereby driving the first conveyor belt 8 to perform the conveying operation, realizing the conveying of the printed paper being tested.

[0026] like Figure 1 and 4As shown, the directional conveying assembly 3 includes a directional conveyor belt 9, a suction assembly, a second drive motor, two directional conveying rollers, and two directional conveying supports symmetrically arranged on both sides of the machine tool body 1. The two conveying rollers are spaced apart at both ends of the directional conveying supports, which are rotatably connected. The two conveying rollers are connected by the directional conveyor belt 9. The second drive motor is mounted on the machine tool body 1, and its power output shaft is connected to one of the directional conveying rollers, enabling it to rotate and thus drive the directional conveyor belt 9 to perform conveying operations. Multiple suction ports are provided on the surface of the directional conveyor belt 9. The suction assembly is located between the two conveying surfaces of the directional conveyor belt 9 and can work with the suction ports to hold the printed paper being tested conveyed on the surface of the directional conveyor belt 9.

[0027] In actual operation, when the device is started, the suction assembly performs suction operation towards the conveying surface of the directional conveyor belt 9. When the printed paper to be tested is input from the input end of the directional conveyor belt 9 through the limiting conveying assembly 2, the suction ports on the surface of the directional conveyor belt 9 generate negative pressure through the suction assembly, forming an adsorption and transmission of the input printed paper to be tested.

[0028] In this embodiment, the suction assembly includes multiple suction pipes and a suction pump. Each suction pipe is a circular tube open at one end and closed at the other. The suction pipes are spaced apart between the two conveying surfaces, with the distance between adjacent suction pipes being less than the length of the printed paper being tested. The open end of each suction pipe is connected to the suction pump. Each suction pipe has multiple sequentially arranged air intakes on its surface.

[0029] When the suction pump operates, it draws in outside air through the suction ports of each suction pipe. As the suction ports on the directional conveyor belt 9 pass through the locations of each suction port, a negative pressure is created at the top, thereby completing the adsorption of the printed paper being tested conveyed on its surface.

[0030] like Figure 4 As shown, both the bottom imaging unit 4 and the top imaging unit 5 include a camera 10, a mounting bracket 11, and two lighting components 12. The camera 10 is fixed to the machine tool body 1 via the mounting bracket 11, with its imaging end facing the conveying surface of the directional conveying component 3 or the imaging area of ​​the limiting conveying component 2. It is used to photograph the printed patterns on the surface of the conveyed printed paper products and transmit the images to a terminal computer via a signal transmission line, allowing operators to clearly see the condition of each printed paper product's surface, facilitating the accurate removal of defective products. The two lighting components 12 are symmetrically arranged on the machine tool body 1, with their illumination ends facing the conveying surface of the directional conveying component 3 or the imaging area of ​​the limiting conveying component 2. This ensures that the camera 10 has sufficient light to clearly photograph the printed patterns on the top or bottom surface of the conveyed printed paper products.

[0031] Furthermore, the camera 10 employs a high-speed linear CCD color camera to capture and record the printed patterns on the surface of the printed paper being tested, which is conveyed by the limiting conveyor assembly 2 and the directional conveyor assembly 3.

[0032] As shown in Figure 4, the lighting assembly 12 includes a lamp, a lamp holder, and a holder base. The holder base is fixed to the machine tool body 1. The lamp holder is rotatably connected to the top of the holder base by screws. The lamp is fixed to the lamp holder. During use, when the screws are loosened, the direction of the lamp's illumination can be adjusted by rotating the lamp holder. When the desired angle is reached, tightening the screws locks the adjusted angle.

[0033] The working principle of this utility model is as follows: The device is activated, and the operator places the printed paper samples to be tested one by one onto the input end of the limiting conveyor assembly 2. The output shafts of the two first drive motors in the bag conveyor assembly 6 and the clamping conveyor assembly 7 rotate simultaneously in opposite directions, thereby driving the corresponding first conveyor belts 8 to perform transport operations in the same direction. The printed paper samples to be tested are transported under the clamping and limiting of the two first conveyor belts 8.

[0034] When the printed paper being tested passes through the shooting area formed between the two conveying units, the camera 10 in the bottom shooting unit 4 takes a picture of the bottom pattern of the printed paper being tested and transmits it to the terminal computer through the signal transmission line.

[0035] Subsequently, when the printed paper to be tested is conveyed to the location of the directional conveying component 3, the suction component performs suction operation on the conveying surface side of the directional conveyor belt 9, so that each suction port on the surface of the directional conveyor belt 9 generates negative pressure through the suction component, forming an adsorption and transmission of the input printed paper to be tested.

[0036] When the printed paper being tested passes through the top-facing camera unit 5, the camera 10 in the top-facing camera unit captures the top pattern of the printed paper and transmits the image to the terminal computer via a signal transmission line. Based on the images of the printed patterns on the top and bottom surfaces of each printed paper being tested, staff accurately reject any problematic printed paper.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A printing quality inspection device for printed paper products, comprising a machine tool body (1), a limiting conveying assembly (2), and a directional conveying assembly (3); the limiting conveying assembly (2) and the directional conveying assembly (3) are arranged sequentially on the machine tool body (1), characterized in that: It also includes a bottom-facing camera unit (4) and a top-facing camera unit (5); The limiting conveying assembly (2) includes two conveying units spaced apart; the space between the two conveying units forms a shooting area that cooperates with the bottom shooting unit (4); the bottom shooting unit (4) is installed at the bottom of the machine tool body (1) and the shooting end faces the shooting area; The top surface imaging unit (5) is set on the conveying path of the directional conveying component (3) and is used to photograph the top surface of the printed paper being tested that is conveyed by the directional conveying component (3).

2. The printing quality inspection device for printed paper products according to claim 1, characterized in that: Each of the conveying units includes a bag conveying assembly (6) and a clamping conveying assembly (7); the bag conveying assembly (6) and the clamping conveying assembly (7) are arranged in sequence along the vertical direction, and the distance between the two conveying surfaces is equal to the thickness of the printed paper being tested.

3. The printing quality inspection device for printed paper products according to claim 2, characterized in that: The bag conveying assembly (6) and the clamping conveying assembly (7) both include a limiting conveying bracket, a first conveyor belt (8), a first drive motor and multiple limiting conveying rollers; the limiting conveying bracket is fixed on the machine tool body (1); each of the limiting conveying rollers is sequentially rotatably connected to the inner side of the limiting conveying bracket and is connected to each other by transmission through the first conveyor belt (8); the power output shaft of the first drive motor is connected to one of the limiting conveying rollers.

4. The printing quality inspection device for printed paper products according to claim 1, characterized in that: The directional conveying assembly (3) includes a directional conveyor belt (9), a second drive motor, two directional conveying rollers and a directional conveying bracket; the two conveying rollers are arranged at intervals on the directional conveying bracket and are rotatably connected to the directional conveying bracket; the two conveying rollers are connected by transmission through the directional conveyor belt (9); the second drive motor is mounted on the machine tool body (1) and the power output shaft is connected to one of the directional conveying rollers.

5. A printing quality inspection device for printed paper products according to claim 4, characterized in that: The directional conveying assembly (3) also includes a suction assembly; multiple suction ports are provided on the surface of the directional conveying belt (9); the suction assembly is located between two conveying surfaces of the directional conveying belt (9) and is used to cooperate with each suction port to adsorb the printed paper being tested conveyed on the surface of the directional conveying belt (9).

6. A printing quality inspection device for printed paper products according to claim 5, characterized in that: The suction assembly includes multiple suction pipes and a suction pump; each suction pipe is a circular pipe with one end open and the other end closed; each suction pipe is arranged at intervals between two conveying surfaces, and the distance between two adjacent suction pipes is less than the length of the printed paper being tested; the open end of each suction pipe is connected to the suction pump; each suction pipe has multiple sequentially arranged air inlets on its surface.

7. The printing quality inspection device for printed paper products according to claim 1, characterized in that: The bottom shooting unit (4) and the top shooting unit (5) each include a camera (10), a mounting bracket (11) and two lighting components (12); wherein, the camera (10) is fixed on the machine tool body (1) by the mounting bracket (11), and the shooting end faces the conveying surface of the directional conveying component (3) or the shooting area of ​​the limiting conveying component (2); the two lighting components (12) are symmetrically arranged on the machine tool body (1), and the lighting ends are both facing the conveying surface of the directional conveying component (3) or the shooting area of ​​the limiting conveying component (2).

8. A printing quality inspection device for printed paper products according to claim 7, characterized in that: The camera (10) is a high-speed linear CCD color camera.

9. A printing quality inspection device for printed paper products according to claim 7, characterized in that: The lighting assembly (12) includes a lamp, a lamp bracket and a bracket base; wherein the bracket base is fixed on the machine tool body (1); the lamp bracket is rotatably connected to the top of the bracket base by screws; and the lamp is fixed on the lamp bracket.

Images