Printing quality detection equipment

Abstract

The invention relates to the technical field of printing detection, in particular to printing quality detection equipment which comprises two roller frames, the two roller frames are in transmission connection with the same conveying belt, one side of one roller frame is fixedly connected with a driving motor, and the conveying belt is divided into the upper stream, the middle stream and the lower stream. A fixing device used for fixing printed products is installed on the upstream portion of the conveying belt, a detecting assembly used for detecting the quality of the printed products is installed on the midstream portion of the conveying belt, a removing mechanism used for removing defective products is installed on the downstream portion of the conveying belt, and a collecting platform used for collecting finished products is installed at the tail end of the conveying belt. According to the device, normal operation of the conveying belt is not affected in the process of detecting and removing the printed products, the detection efficiency of the device is effectively improved, the detected defective products can be directly removed from the conveying belt in the first time, the situation that the defective products are mixed into qualified products and flow into the market is avoided, and quality control of printing is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of printing detection, and in particular to a printing quality detection device. Background Art

[0002] The popularization of printing technology is a historic process, which has greatly promoted the progress of human civilization. From early seals and stone carvings, to later papermaking and movable type printing, and then to modern digital printing technology, printing technology has undergone a long and continuous development. In the printing process, common defects include missed printing, bridging, collapse, pull tip and offset. These defects are mainly caused by a variety of different factors such as templates, solder paste, scrapers and printing process parameters. Therefore, after printing is completed, the quality of the printed products needs to be inspected in time. Conventional manual naked eye inspection cannot distinguish the subtle defects of mechanical printing, and is inefficient and cannot cooperate with the existing digital printing process. Therefore, it is necessary to provide a printing quality inspection device to replace manual inspection.

[0003] There is a detection device for detecting the printing quality of printed paper products in the prior art, for example, Chinese invention patent CN117825401B discloses a detection device for detecting the printing quality of printed paper products, including: a detection device body, the detection device body includes a detection platform, a conveyor belt mechanism and a detection component are installed on the detection platform, the detection component includes two detection plates and a crossbeam, the two detection plates are installed on the detection platform at intervals and are located on both sides of the conveyor belt mechanism, a crossbeam is slidably installed between the two detection plates, the crossbeam moves up and down between the two detection plates, and the crossbeam is connected to an optical detection module through a movable mechanism, so that the optical detection module is located above the conveyor belt mechanism. The conveyor belt mechanism is used to transport printed paper products, the optical detection module moves up and down on the crossbeam, and the movable mechanism drives the optical detection module to move in the width direction above the conveyor belt mechanism, and the focal length of the optical detection module is adjusted, so that the quality of printed paper products of different widths on the conveyor belt mechanism can be detected, which greatly improves the scope of use of the detection device. The above scheme still has obvious shortcomings. For example, in order to improve production efficiency, the existing digital printing machine runs at a faster speed, and the printed products are also transported at a faster speed along with the transportation device. However, when the above-mentioned detection device is used, after detecting defective samples, it is impossible to remove them from the mechanical line in time, which may cause defective products to enter the market. Therefore, the existing technology urgently needs a technical solution to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a printing quality inspection device to solve the problems in the prior art.

[0005] In order to solve the above technical problems, the present invention specifically provides the following technical solutions: A printing quality inspection device comprises two roller frames, the two roller frames are connected to the same conveyor belt, one side of one of the roller frames is fixedly connected to a driving motor, the conveyor belt is divided into an upstream, a middle and a downstream, a fixing device for fixing printed products is installed at the upstream of the conveyor belt, a detection component for detecting the quality of printed products is installed at the middle of the conveyor belt, a rejection mechanism for rejecting defective products is installed at the downstream of the conveyor belt, and a collection platform for collecting finished products is installed at the end of the conveyor belt. Based on a preferred solution provided by a printing quality inspection device, the rejection mechanism includes a support frame installed downstream of a conveyor belt, two mounting plates are fixedly installed on the top of the support frame, and the same roller is rotatably installed on the top of the two mounting plates, wherein a power motor for driving the roller to rotate is fixedly connected to the side wall of one of the mounting plates, two adsorption components are fixedly connected to the outside of the roller, and two driving components for driving the adsorption components are rotatably connected to the outside of the roller.

[0006] Based on a preferred solution provided by a printing quality inspection device, the adsorption component includes a connecting ring fixedly connected to the rotating roller, a plurality of hollow columns are fixedly connected to the outside of the connecting ring, a guide column is slidably connected inside the hollow column, a slanted top block is fixedly connected to the top of the guide column, a suction cup is fixedly connected to the bottom of the guide column, a spring is sleeved on the outside of the guide column, and the two ends of the spring are respectively pressed against the bottom of the slanted top block and the bottom of the inner side of the hollow column, and the side wall of the hollow column is provided with a through hole.

[0007] Based on a preferred solution provided by a printing quality inspection device, the driving assembly includes a right-angle plate rotatably connected to the outside of the roller, and the right-angle plate is rotatably connected to the connecting ring, and a cylinder is fixedly connected to the bottom of the right-angle plate, and the output end of the cylinder successively passes through the right-angle plate and the through hole and then extends into the hollow column, and the right-angle plate and the mounting plate are fixedly connected along the axial direction of the roller.

[0008] Based on a preferred solution provided by a printing quality inspection device, a telescopic rod is fixedly connected to the side wall of the mounting plate, and the output end of the telescopic rod passes through the mounting plate and is fixedly connected to the right-angle plate.

[0009] Based on a preferred solution provided by a printing quality inspection device, the inclined surface of the inclined lift block is slidably connected to a pressure plate, and a receiving seat is fixedly connected to one side of the pressure plate. When the pressure plate slides to the bottom of the inclined lift block, the receiving seat is connected to the through hole.

[0010] Based on a preferred solution provided by a printing quality inspection device, the fixing device includes a top support frame installed upstream of the conveyor belt, a bellows is fixedly installed on the top of the top support frame, and the top of the bellows is in contact with the bottom of the conveyor belt, and a fan for guiding the airflow in the bellows is fixedly connected to the bottom of the bellows, a plurality of air holes are evenly arranged on the conveyor belt, and a plurality of avoidance grooves for cooperating with the air holes are arranged on the top of the bellows.

[0011] Based on a preferred solution provided by a printing quality inspection device, the inspection component includes a placement rack installed in the middle of the conveyor belt, the top of the placement rack is fixedly connected to an arch plate, a CNC box is fixedly installed on the inner side of the top of the arch plate, and a plurality of color gamut sensors are fixedly connected to the bottom of the CNC box.

[0012] Compared with the prior art, the present invention has the following beneficial effects: the device will not affect the normal operation of the conveyor belt during the process of detecting and rejecting printed products, effectively improving the detection efficiency of the device, and the detected defective products will be directly rejected from the conveyor belt at the first time, avoiding the situation where defective products are mixed with qualified products and enter the market, thereby ensuring the quality control of printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0015] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure without the conveyor belt; Figure 3 It is a three-dimensional structural schematic diagram of the rejection mechanism in the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the detection component in the present invention; Figure 5 for Figure 3 A front cross-sectional view of Figure 6 for Figure 5 A is an enlarged schematic diagram; Figure 7 for Figure 6 A magnified schematic diagram of B.

[0016] In the figure: 1. roller frame; 11. conveyor belt; 12. drive motor; 13. air vent; 2. fixing device; 21. top support frame; 22. bellows; 221. avoidance groove; 23. fan; 3. detection component; 31. placement frame; 32. arch plate; 33. CNC box; 34. color gamut sensor; 4. rejection mechanism; 41. support frame; 42. mounting plate; 43. roller; 44. power motor; 5. adsorption component; 51. connecting ring; 52. hollow column; 521. perforation; 53. guide column; 54. inclined top block; 55. suction cup; 56. spring; 6. drive component; 61. right angle plate; 62. cylinder; 63. telescopic rod; 7. pressure plate; 71. receiving seat. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The following first describes the concepts involved in the present application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of the present application easier to understand, and does not limit the scope of protection of the present application; at the same time, the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0019] Example like Figures 1 to 7 As shown, the present invention provides a printing quality inspection device, including two roller frames 1, the two roller frames 1 are transmission-connected with the same conveyor belt 11, one side of one of the roller frames 1 is fixedly connected with a driving motor 12, the conveyor belt 11 is divided into an upstream, a middle and a downstream, a fixing device 2 for fixing the printed product is installed at the upstream of the conveyor belt 11, a detection component 3 for detecting the quality of the printed product is installed at the middle of the conveyor belt 11, a rejection mechanism 4 for rejecting defective products is installed at the downstream of the conveyor belt 11, and a collection platform for collecting finished products is installed at the end of the conveyor belt 11.

[0020] As a further illustration of the embodiments of the present invention, in order to improve production efficiency, the existing digital printing machinery operates at a relatively fast speed, and the printed products are also transported at a relatively fast speed by the transport device. However, the existing detection device cannot promptly remove defective samples from the mechanical line after detecting them, which may cause defective products to flow into the market. In this embodiment, the printed products enter from the upstream of the conveyor belt 11 in sequence, and are fixed by the fixing device 2 to prevent the printed products from flying out of the conveyor belt 11 due to excessive speed during the movement of the conveyor belt 11. Subsequently, they are scanned by the detection component 3 for quality inspection. If there is a quality problem, they are removed from the conveyor belt 11 by the rejection mechanism 4 set up in advance in the middle of the conveyor belt 11, and are processed separately. If there is no quality problem, they enter the collection platform (not shown in the figure) along the conveying direction of the conveyor belt 11 to complete the whole process. The detection process of the present invention will not affect the normal operation of the conveyor belt 11 during the process of detecting and rejecting printed products, which effectively improves the detection efficiency of the present invention, and the detected defective products will be directly rejected from the conveyor belt 11 at the first time, avoiding the situation where defective products are mixed with qualified products and flow into the market, thereby ensuring the quality control of printing. In addition, the detection component 3 and the rejection mechanism 4 are successively set up in the midstream and downstream of the same conveyor belt 11, so that the rejection mechanism 4 can respond to the detection result of the detection component 3 in time, which effectively improves the efficiency of the present invention in rejecting defective products.

[0021] As a further solution of the printing quality inspection device, the rejection mechanism 4 includes a support frame 41 installed downstream of the conveyor belt 11, and two mounting plates 42 are fixedly installed on the top of the support frame 41. The same roller 43 is rotatably installed on the top of the two mounting plates 42, and the side wall of one of the mounting plates 42 is fixedly connected to a power motor 44 for driving the roller 43 to rotate, and the outside of the roller 43 is fixedly connected to two adsorption components 5, and the outside of the roller 43 is rotatably connected to two driving components 6 for driving the adsorption components 5.

[0022] As a further explanation of the embodiment of the present invention, in this embodiment, two adsorption components 5 and two driving components 6 are provided to facilitate the stability of the adsorption component 5 when adsorbing defective products. When the defective products are fixed by the adsorption component 5, the power motor 44 drives the defective products to separate from the conveyor belt 11, thereby achieving the effect of removing the defective products. At this time, the defective products separated from the conveyor belt 11 are removed from the adsorption component 5 by manual or mechanical assistance, and then the adsorption component 5 is rotated and reset to face the conveyor belt 11 by the power motor 44, and then the pending working state can be entered again.

[0023] As a further solution of the printing quality inspection equipment, the adsorption component 5 includes a connecting ring 51 fixedly connected to the rotating roller 43, a plurality of hollow columns 52 are fixedly connected to the outside of the connecting ring 51, a guide column 53 is slidably connected inside the hollow column 52, a slanted lift block 54 is fixedly connected to the top of the guide column 53, a suction cup 55 is fixedly connected to the bottom of the guide column 53, a spring 56 is sleeved on the outside of the guide column 53, and the two ends of the spring 56 respectively press against the bottom of the slanted lift block 54 and the bottom of the inner side of the hollow column 52.

[0024] As a further explanation of the embodiment of the present invention, in this embodiment, a plurality of hollow columns 52 are used to further ensure the working continuity of the adsorption component 5. After the suction cup 55 at the bottom of one of the hollow columns 52 adsorbs the defective product, the connecting ring 51 is driven to rotate by the power motor 44 to rotate the suction cup 55 adsorbing the defective product away from the conveyor belt 11. At the same time, another hollow column 52 carries the suction cup 55 in a non-working state to rotate to a pending working state aligned with the conveyor belt 11 at the bottom, so as to cope with the situation of continuous appearance of defective products. In addition, a group of data detection centers can be connected to the rejection component. When the rejection component runs continuously for a preset number of times, an alarm is issued and the printing operation is stopped. When printing errors occur, prevention is carried out to avoid causing more losses.

[0025] As a further solution of the printing quality inspection device, the driving assembly 6 includes a right-angle plate 61 rotatably connected to the outside of the roller 43, and the right-angle plate 61 is rotatably connected to the connecting ring 51, and a cylinder 62 is fixedly connected to the bottom of the right-angle plate 61. A through hole 521 is provided on the side wall of the hollow column 52. The output end of the cylinder 62 passes through the right-angle plate 61 and the through hole 521 in sequence and then extends into the hollow column 52. The right-angle plate 61 and the mounting plate 42 are both connected along the axial direction of the roller 43.

[0026] As a further explanation of the embodiment of the present invention, the working principle of the rejection mechanism 4 in this embodiment is: when the detection component 3 detects a defective product, the cylinder 62 is started, and the output end of the cylinder 62 contacts the inclined surface of the inclined lift block 54. With the support of the output end of the cylinder 62, the inclined lift block 54 slides downward along the axis of the guide column 53, so that the suction cup 55 approaches the defective product below. Therefore, the suction cup 55 is subjected to a downward resistance force and deformed in the process of fitting with the defective product. A vacuum is formed in the suction cup 55 that is emptied of air, and the atmospheric pressure compresses the suction cup 55 to adsorb the defective product, thereby achieving the effect of the suction cup 55 adsorbing the defective product.

[0027] As a further solution of the printing quality inspection device, a telescopic rod 63 is fixedly connected to the side wall of the mounting plate 42 , and the output end of the telescopic rod 63 passes through the mounting plate 42 and is fixedly connected to the right-angle plate 61 .

[0028] As a further illustration of an embodiment of the present invention, in this embodiment, the output end of the telescopic rod 63 connects the right-angle plate 61 to the mounting plate 42, and the output end of the telescopic rod 63 drives the right-angle plate 61 to slide back and forth along the axial direction of the roller 43, while the telescopic rod 63 is rotatably connected to the connecting ring 51, so that the telescopic rod 63 can be used to adjust the distance between the two adsorption components 5, so that the adsorption components 5 can clamp printed products of different widths, thereby expanding the scope of application of the present device.

[0029] As a further solution of the printing quality inspection equipment, the inclined surface of the inclined lift block 54 is slidably connected to a pressure plate 7, and a receiving seat 71 is fixedly connected to one side of the pressure plate 7. A receiving hole is opened inside the receiving seat 71, and when the pressure plate 7 slides to the bottom of the inclined lift block 54, the receiving hole in the receiving seat 71 is connected to the through hole 521.

[0030] As a further explanation of an embodiment of the present invention, the pressure plate 7 in this embodiment is intended to increase the contact area between the output end of the cylinder 62 and the inclined lift block 54, so that the force on the inclined lift block 54 is more uniform and stable. After the output end of the cylinder 62 is separated from the inclined lift block 54, the pressure plate 7 is pulled downward to the bottom by gravity, making it easier for the output end of the cylinder 62 to extend.

[0031] As a further solution of the printing quality inspection equipment, the fixing device 2 includes a top support frame 21 installed upstream of the conveyor belt 11, a bellows 22 is fixedly installed on the top of the top support frame 21, and the top of the bellows 22 fits the bottom of the conveyor belt 11, and the bottom of the bellows 22 is fixedly connected to a fan 23 for guiding the airflow direction in the bellows 22. A plurality of air holes 13 are evenly arranged on the conveyor belt 11, and a plurality of avoidance grooves 221 for cooperating with the air holes 13 are arranged on the top of the bellows 22.

[0032] As a further explanation of the embodiment of the present invention, in this embodiment, the air in the bellows 22 is extracted by the fan 23, so that a negative pressure environment is formed on the top of the bellows 22. Because the avoidance groove 221 opened on the top of the bellows 22 cooperates with the air holes 13, when the printed products are placed on the conveyor belt 11, the negative pressure suction force generated in the multiple air holes 13 can adsorb the printed products on the surface of the conveyor belt 11 to form a temporary fixation. The bellows 22 spans the upstream and midstream of the conveyor belt 11, and the rejection mechanism 4 is located downstream of the conveyor belt 11. The printed products will not be disturbed by the bellows 22 during the rejection process. In addition, the negative pressure generated inside the bellows 22 accelerates the air flow rate at the top of the bellows, so that the printed products have a certain air-drying effect.

[0033] As a further solution of the printing quality inspection equipment, the inspection component 3 includes a placement rack 31 installed in the middle of the conveyor belt 11, the top of the placement rack 31 is fixedly connected to an arch plate 32, a CNC box 33 is fixedly installed on the inner side of the top of the arch plate 32, and a plurality of color gamut sensors 34 are fixedly connected to the bottom of the CNC box 33.

[0034] As a further explanation of the embodiment of the present invention, the detection component 3 in this embodiment mainly cooperates with multiple color gamut sensors 34 to scan the printed products on the conveyor belt 11 in different areas. When an abnormal color gamut appears, the abnormal information can be uploaded through the CNC box 33, and the rejection component can be activated through the abnormal information instruction. The abnormal defective products can be removed from the conveyor belt 11 to complete the quality inspection of the printed products.

[0035] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any form. Any technical personnel in this field may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention. This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A printing quality inspection device, comprising two roller frames (1), characterized in that: The two roller frames (1) are connected to a same conveyor belt (11) in a transmission manner, one side of one of the roller frames (1) is fixedly connected to a driving motor (12), the conveyor belt (11) is divided into an upstream, a middle and a downstream, a fixing device (2) for fixing printed products is installed at the upstream of the conveyor belt (11), a detection component (3) for detecting the quality of printed products is installed at the middle of the conveyor belt (11), a rejection mechanism (4) for rejecting defective products is installed at the downstream of the conveyor belt (11), and a collection platform for collecting finished products is installed at the end of the conveyor belt (11).

2. A printing quality inspection device according to claim 1, characterized in that: The rejection mechanism (4) comprises a support frame (41) installed downstream of the conveyor belt (11), two mounting plates (42) are fixedly installed on the top of the support frame (41), and the same roller (43) is rotatably installed on the top of the two mounting plates (42), a power motor (44) for driving the roller (43) to rotate is fixedly connected to the side wall of one of the mounting plates (42), two adsorption components (5) are fixedly connected to the outside of the roller (43), and two driving components (6) for driving the adsorption components (5) are rotatably connected to the outside of the roller (43).

3. A printing quality inspection device according to claim 2, characterized in that: The adsorption assembly (5) comprises a connecting ring (51) fixedly connected to the rotating roller (43); a plurality of hollow columns (52) are fixedly connected to the outside of the connecting ring (51); a guide column (53) is slidably connected to the inside of the hollow column (52); a slanted top block (54) is fixedly connected to the top of the guide column (53); a suction cup (55) is fixedly connected to the bottom of the guide column (53); a spring (56) is sleeved on the outside of the guide column (53); and two ends of the spring (56) respectively press against the bottom of the slanted top block (54) and the bottom of the inner side of the hollow column (52).

4. A printing quality inspection device according to claim 3, characterized in that: The driving assembly (6) comprises a right-angle plate (61) rotatably connected to the outside of the rotating roller (43), and the right-angle plate (61) is rotatably connected to the connecting ring (51), a cylinder (62) is fixedly connected to the bottom of the right-angle plate (61), a through hole (521) is provided on the side wall of the hollow column (52), an output end of the cylinder (62) passes through the right-angle plate (61) and the through hole (521) in sequence and then extends into the hollow column (52), and the right-angle plate (61) and the mounting plate (42) are both connected along the axial direction of the rotating roller (43).

5. A printing quality inspection device according to claim 4, characterized in that: A telescopic rod (63) is fixedly connected to the side wall of the mounting plate (42), and an output end of the telescopic rod (63) passes through the mounting plate (42) and is fixedly connected to the right-angle plate (61).

6. A printing quality inspection device according to claim 4, characterized in that: The inclined surface of the inclined lift block (54) is slidably connected to a pressure plate (7), and one side of the pressure plate (7) is fixedly connected to a receiving seat (71). A receiving hole is provided in the receiving seat (71), and when the pressure plate (7) slides to the bottom of the inclined lift block (54), the receiving hole in the receiving seat (71) is communicated with the through hole (521).

7. The printing quality inspection device according to claim 1, characterized in that: The fixing device (2) comprises a top support frame (21) installed upstream of the conveyor belt (11), a bellows (22) is fixedly installed on the top of the top support frame (21), and the top of the bellows (22) is in contact with the bottom of the conveyor belt (11), and a fan (23) for guiding the flow direction of air in the bellows (22) is fixedly connected to the bottom of the bellows (22), a plurality of air holes (13) are evenly arranged on the conveyor belt (11), and a plurality of avoidance grooves (221) for matching the air holes (13) are arranged on the top of the bellows (22).

8. The printing quality inspection device according to claim 1, characterized in that: The detection component (3) comprises a placement rack (31) installed in the middle of the conveyor belt (11), the top of the placement rack (31) is fixedly connected to an arch plate (32), a numerical control box (33) is fixedly installed on the inner side of the top of the arch plate (32), and the bottom of the numerical control box (33) is fixedly connected to a plurality of color gamut sensors (34).

Images