Printing quality detection mechanism for double-faced printing plate

Abstract

The utility model provides a printing quality detection mechanism for double-faced version, which comprises symmetrically and vertically arranged racks, a tension adjusting assembly, a printing detection assembly and a version detection assembly which are connected with the racks are sequentially arranged between the racks along the feeding direction, the printing detection assembly comprises a moving part and an angle adjusting part, and the moving part is connected with the angle adjusting part. The angle adjusting part is provided with a fixedly connected camera, and the register detection assembly comprises a first detection part and a second detection part which are arranged in parallel up and down; through the first detection part and the second detection part of the register assembly, the coincidence of the front cursor and the back cursor on the front and back surfaces of the printed reel paper can be detected, so that the accuracy of the printing position is detected; the color and definition of the pattern printed on the surface of the reel paper are shot and compared through the camera, and the correctness of the content of the printed pattern is detected.

Description

Technical Field

[0001] The utility model relates to the technical field of printing detection equipment, in particular to a printing quality detection mechanism for double-sided printing. Background Art

[0002] After the outer packaging roll paper of cigarettes is printed, it is necessary to further check the printed pattern on its surface to find out the incorrectly printed parts. The printing of the roll paper generally adopts the method of molded roller rolling printing to print the pattern on the roll paper. Since the pattern on the printing roller is fixed, the printed product pattern is also fixed and repeated, and the spacing of the repeated pattern is fixed. However, during the continuous production process of the equipment, the printed pattern may cause printing errors due to uncertain factors such as poor operation of equipment parts. Therefore, it is necessary to check the printing quality after printing is completed. The existing registration method generally uses a cursor to register the plate, so as to ensure the accuracy of the roll paper overprinting.

[0003] Based on the above situation, in the prior art, a patent with publication number CN206983496U discloses a laser film production positioning device, including a rewinding mechanism and a film pressing mechanism. The film pressing mechanism drives the coating film on the rewinding mechanism to pass through the film pressing mechanism to form a laser film. It also includes a detection device and a servo control system. The film pressing mechanism includes a film pressing roller and a laser plate attached to the film pressing roller. A cursor is provided on the laser plate. When the detection device detects that the deviation between the plate width length between the two cursors and the set value exceeds the error range, the servo control system automatically controls the operation of the film pressing roller to return the plate width length to the set value.

[0004] The detection device inside the above-mentioned production device checks the printing position of the laser film by means of a single-sided cursor. That is, when the detection device detects that the time interval between the two cursors is the same, it indicates that there is no error in the printing of the laser pattern on the laser film. However, there are still some areas that can be improved in the cursor detection of the above-mentioned production device. The printing quality detection accuracy of the above-mentioned equipment is insufficient. The detection device checks the cursor on one side and can only confirm that the printing position of the laser pattern on the coating film is correct, but cannot confirm whether the color and clarity of the printed laser pattern meet the requirements. At the same time, the detection method of the single-sided cursor only detects one side, which cannot fully reflect the situation of the entire printing surface, and the accuracy of the entire printing surface cannot be fully fed back. Utility Model Content

[0005] In view of the technical defects existing in the background technology, the utility model proposes a printing quality detection mechanism for double-sided printing. In order to further solve the above technical problems and meet practical needs, the specific technical solution is as follows:

[0006] A printing quality inspection mechanism for double-sided plates, comprising symmetrically erected frames, wherein a printing inspection component and a plate registration inspection component connected to the frames are sequentially arranged between the frames along the material feeding direction, a third conveying roller and a second conveying roller connected to the frames are respectively arranged on the left and right sides of the plate registration inspection component, a tension adjustment component connected to the frame is arranged below the printing inspection component, a first conveying roller connected to the frame is arranged below the tension adjustment component, the printing inspection component comprises a moving part and an angle adjustment part, the angle adjustment part is provided with a fixedly connected camera, the plate registration inspection component comprises a first detection component and a second detection component arranged in parallel up and down, and the plate registration inspection component is provided with a first electric eye and a second electric eye corresponding to the upper and lower positions.

[0007] Furthermore, it also includes a tension adjustment component arranged below the printing detection component and connected to the frame, the tension adjustment component includes a tension roller, a fixed plate and a support rod, the support rod is horizontally erected between the frames and fixedly connected to the frames.

[0008] Furthermore, both ends of the support rod are respectively connected to fixed plates, both ends of the tension roller are respectively movably connected to the fixed plates, one side of the fixed plate is provided with a tension electric cylinder fixedly connected to the frame, and the telescopic end of the tension electric cylinder is movably connected to the fixed plate.

[0009] Furthermore, the first detection component and the second detection component are both provided with a first slide plate, a second slide plate, a first screw rod, and a first drive motor. The two ends of the first screw rod are respectively connected to the first slide plate and the second slide plate near the end positions. The end of one end of the first screw rod is fixedly connected to the power output shaft of the first drive motor. A movable sleeve is movably sleeved on the outside of the first screw rod. A first external thread is provided on the surface of the first screw rod. An internal thread that can cooperate with the first external thread is provided inside the movable sleeve.

[0010] Furthermore, a sliding window corresponding to the positions of the first slide plate and the second slide plate is provided in the frame, the first slide plate and the second slide plate are arranged in the sliding window, and a sliding groove capable of sliding in cooperation with the first slide plate and the second slide plate is provided in the sliding window.

[0011] Furthermore, the movable component includes a second screw rod, a second drive motor, an adjusting sleeve and a connecting plate. The second screw rod is horizontally arranged between the frames and movably connected to the frames. The end of one end of the second screw rod is fixedly connected to the power output shaft of the second drive motor. The adjusting sleeve is movably sleeved on the outer surface of the second screw rod. The surface of the second screw rod is provided with a second external thread. The inside of the adjusting sleeve is provided with an internal thread that can cooperate with the second external thread. The connecting plate is vertically symmetrically arranged on the lower surface of the adjusting sleeve.

[0012] Furthermore, the angle adjustment component also includes a rotating motor, a rotating shaft, and a rotating sleeve. The rotating shaft is mounted between the connecting plates and is movably connected to the connecting plates. The end of one end of the rotating shaft is connected to the power output shaft of the rotating motor. The rotating sleeve is fixedly sleeved on the outside of the rotating shaft, and the camera is connected to the lower surface of the rotating sleeve.

[0013] Beneficial effects of the utility model:

[0014] The utility model can detect the accuracy of the printing position of a pattern and the correctness of the content by combining a plate detection component with a printing detection component. The positions of the front cursor and the back cursor on the front and back sides of the printed roll paper can be detected by the first detection component and the second detection component. When the first detection component detects that the signal of the front cursor and the second detection component detects the back cursor are synchronized, it means that the positions of the front cursor and the back cursor on the roll paper correspond, and the printing position of the pattern has not deviated, thereby detecting the accuracy of the printing position. The printing detection component uses the front cursor as a shooting signal and uses a camera to shoot and compare the color and clarity of the pattern printed on the surface of the roll paper, thereby detecting the correctness of the content of the packaging printing pattern. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the utility model.

[0016] Figure 2 It is a schematic diagram of the tension adjustment component of the utility model.

[0017] Figure 3 It is a schematic diagram of the structure of the plate alignment detection component of the utility model.

[0018] Figure 4 It is a schematic diagram of the connection between the plate alignment detection component and the frame of the utility model.

[0019] Figure 5 This is a schematic diagram of the structure of the printing detection component of the utility model.

[0020] Figure 6 It is a schematic diagram of the positional relationship between the front side of the paper roll and the front side cursor of the utility model.

[0021] Figure 7 It is a schematic diagram of the positional relationship between the back side of the roll paper and the back side cursor of the utility model.

[0022] Reference numerals: frame 1, first conveyor roller 11, second conveyor roller 12, third conveyor roller 13, tension adjustment assembly 2, tension roller 21, fixing plate 22, support rod 23, tension electric cylinder 24, connecting seat 25, hinge shaft 26, registration detection assembly 3, first detection component 31, first electric eye 311, second detection component 32, second electric eye 321, push plate 33, push electric cylinder 34, first drive motor 35, first slide plate 36, upper mounting plate 361, lower mounting plate 3 62, second slide plate 37, sliding window 38, slide groove 381, first screw rod 39, first external thread 391, movable sleeve 30, printing detection component 4, movable component 40, second screw rod 41, second external thread 411, angle adjustment component 42, second external thread 411, second drive motor 43, adjustment sleeve 44, connecting plate 45, rotating motor 46, rotating shaft 47, rotating sleeve 49, camera 48, roll paper 5, front cursor 51, back cursor 52. DETAILED DESCRIPTION

[0023] like Figures 1 to 7 As shown, the utility model provides a technical solution: a printing quality detection mechanism for double-sided plate, comprising a symmetrically erected frame 1, wherein a tension adjustment component 2, a printing detection component 4 and a plate registration detection component 3 connected to the frame 1 are sequentially arranged between the frames 1 along the feeding direction, a third conveying roller 13 and a second conveying roller 12 connected to the frame 1 are arranged on the left and right sides of the plate registration detection component 3, respectively, a tension adjustment component 2 connected to the frame 1 is arranged below the printing detection component 4, a first conveying roller 11 connected to the frame 1 is arranged below the tension adjustment component 2, the printing detection component 4 comprises a moving component 40 and an angle adjustment component 42, the angle adjustment component 42 is provided with a fixedly connected camera 48, the plate registration detection component 3 comprises a first detection component 31 and a second detection component 32 arranged in parallel above and below, and the plate registration detection component 3 is provided with a first electric eye 311 and a second electric eye 321 corresponding to the upper and lower positions.

[0024] The utility model is suitable for the positioning detection of the front cursor 51 and the back cursor 52 of the roll paper 5, the front cursor 51 is located at the left and right edges of the upper surface of the roll paper 5, and the back cursor 52 is located at the left and right edges of the lower surface of the roll paper 5. The plate detection component 3 checks the correctness of the printing position of the pattern printed on the surface of the roll paper 5 through the front cursor 51 and the back cursor 52. The first electric eye 311 of the first detection component 31 performs positioning detection on the front cursor 51 to obtain a front cursor detection signal. The second electric eye 321 of the second detection component 32 performs positioning detection on the back cursor 52 to obtain a back cursor detection signal. When the front cursor 51 and the back cursor 52 are at the same When the front cursor 51 and the back cursor 52 are detected by the corresponding electric eye, the front cursor detection signal and the back cursor detection signal are synchronized, which indicates that the printing position of the pattern on the upper surface of the roll paper 5 is correct and there is no misprint. On the contrary, if the front cursor 51 and the back cursor 52 are not detected at the same time, the front cursor detection signal and the back cursor detection signal are asynchronous. The first electric eye 311 and the second electric eye 321 are respectively provided with corresponding displacement sensors (not shown in the figure). The first electric eye 311 and the second electric eye 321 record the distance between the current non-corresponding front cursor 51 and the back cursor 52 on the roll paper 5 through the corresponding displacement sensors, and send the distance information to the control system for recording.

[0025] The printing detection component 4 of the present invention can detect the correctness of the printed content of the pattern on the surface of the roll paper 5. The printing detection component 4 shoots the printed pattern through the camera 48, and then sends the photographed picture to the control system. The control system compares the color, clarity and other items of the pattern printed on the surface of the roll paper 5 with the standard printed pattern, thereby detecting the correctness of the printed pattern content.

[0026] It should be noted that an image recognition trigger device and a displacement sensor are also provided in the printing detection component 4 (the image recognition trigger device and the displacement sensor are not drawn in the figure). The image recognition trigger device serves as a trigger signal device for the camera 48 to collect images. When working, the image recognition trigger device recognizes the printed pattern on the surface of the roll paper 5, and then sends a shooting signal to the camera 48. The camera 48 shoots the printed pattern. When the pattern on the surface of the roll paper 5 is inconsistent with any comparison item in the standard printing pattern, the control system identifies the distance of the error location on the roll paper 5 through the displacement sensor, and then records the specific comparison item differences.

[0027] As a preferred embodiment of the present invention, Figure 2As shown, the tension adjustment assembly 2 includes a tension roller 21, a fixed plate 22 and a support rod 23. The support rod 23 is horizontally erected between the frames 1 and fixedly connected to the frames 1; both ends of the support rod 23 are respectively connected to the fixed plates 22, and both ends of the tension roller 21 are respectively movably connected to the fixed plates 22. One side of the fixed plate 22 is provided with a tension electric cylinder 24 fixedly connected to the frame 1, and the telescopic end of the tension electric cylinder 24 is movably connected to the fixed plate 22.

[0028] The tension adjustment component 2 includes a tension roller 21, both ends of the tension roller 21 are connected to a support rod 23 through a fixed plate 22, the support rod 23 is transversely fixed on the frame 1, one side of the fixed plate 22 is connected to a tension electric cylinder 24, and the telescopic end of the tension electric cylinder 24 is movably connected to the fixed plate 22, so that the telescopic action of the tension electric cylinder 24 accurately controls the position of the tension roller 21, thereby realizing the tension adjustment of the reel paper 5 passing through the tension roller 21. At the same time, by adjusting the tension of the reel paper 5 through the tension adjustment component 2, the image captured by the camera 48 can be made more stable. Uneven tension may cause the paper tape material to twist or deform during transmission, which will cause distortion in the image captured by the camera. Tension adjustment can ensure that the paper tape material remains flat during transmission, reduce image distortion, and improve image quality.

[0029] As a preferred embodiment of the present invention, Figure 3 and Figure 4 As shown, the first detection component 31 and the second detection component 32 are both provided with a first slide plate 36, a second slide plate 37, a first screw rod 39, and a first drive motor 35. The two ends of the first screw rod 39 are respectively connected to the first slide plate 36 and the second slide plate 37 near the end positions. The end of one end of the first screw rod 39 is fixedly connected to the power output shaft of the first drive motor 35. The first screw rod 39 is externally movably sleeved with a movable sleeve 30. The surface of the first screw rod 39 is provided with a first external thread 391. The movable sleeve 30 is internally provided with an internal thread that can cooperate with the first external thread 391. A sliding window 38 corresponding to the position of the first slide plate 36 and the second slide plate 37 is provided in the frame 1. The first slide plate 36 and the second slide plate 37 are arranged in the sliding window 38. The sliding window 38 is provided with a sliding groove 381 that can slide with the first slide plate 36 and the second slide plate 37, so that the first detection component 31 and the second detection component 32 can respectively adjust the position of the first electric eye 311 and the second electric eye 321 laterally.

[0030] The first detection component 31 and the second detection component 32 both include a first slide 36 and a second slide 37. The first slide 36 and the second slide 37 are respectively located on both sides of a sliding window 38. The sliding window 38 is arranged inside the frame 1. The first slide 36 and the second slide 37 slide in a slide groove 381 in the sliding window 38. The slide groove 381 provides a stable and precise sliding path. Both ends of the first screw rod 39 are respectively connected to the first slide 36 and the second slide 37 to ensure that the first slide 36 and the second slide 37 can move synchronously. One end of the first screw rod 39 is fixedly connected to the power output shaft of the first drive motor 35. The first screw rod 39 can be driven to rotate through the telescopic movement of the electric cylinder.

[0031] The first screw rod 39 is externally movablely sleeved with a movable sleeve 30, and the movable sleeve 30 is internally provided with an internal thread that matches the first external thread 391 on the first screw rod 39. The thread matching converts the rotational motion of the first screw rod 39 into the linear motion of the movable sleeve 30. When the first drive motor 35 is working, it drives the first screw rod 39 to rotate, thereby causing the movable sleeve 30 to move linearly along the screw rod. Since the first slide plate 36 and the second slide plate 37 are respectively connected to the two ends of the screw rod, the first electric eye 311 or the second electric eye 321 installed thereon are driven to make corresponding position adjustments.

[0032] As a preferred embodiment of the present invention, Figure 5 As shown, the movable component 40 includes a second screw rod 41, a second drive motor 43, an adjusting sleeve 44 and a connecting plate 45. The second screw rod 41 is horizontally mounted between the frames 1 and movably connected to the frames 1. The end of one end of the second screw rod 41 is fixedly connected to the power output shaft of the second drive motor 43. The adjusting sleeve 44 is movably sleeved on the outer surface of the second screw rod 41. The surface of the second screw rod 41 is provided with a second external thread 411. The inside of the adjusting sleeve 44 is provided with an internal thread that can cooperate with the second external thread 411. The connecting plate 45 is vertically symmetrically arranged on the lower surface of the adjusting sleeve 44. Through the cooperation of the second screw rod 41, the second drive motor 43, the adjusting sleeve 44 and the connecting plate 45 of the movable component 40, the position of the angle adjustment component 42 above the front side of the roll paper 5 can be fixed.

[0033] As a preferred embodiment of the present invention, Figure 5As shown, the angle adjustment component 42 also includes a rotating motor 46, a rotating shaft 47, and a rotating sleeve 49. The rotating shaft 47 is mounted between the connecting plates 45 and movably connected to the connecting plates 45. The end of one end of the rotating shaft 47 is connected to the power output shaft of the rotating motor 46. The rotating sleeve 49 is fixedly sleeved on the outside of the rotating shaft 47. The camera 48 is connected to the lower surface of the rotating sleeve 49. The angle adjustment component 42 is used to adjust the rotation angle of the camera 48 so that the camera 48 can always be perpendicular to the reel paper 5 after tension adjustment. Specifically, the rotating motor 46 drives the rotating shaft 47 to rotate, the rotating shaft 47 drives the rotating sleeve 49 to rotate together, and the rotating sleeve 49 drives the camera 48 to move and rotate, thereby realizing the adjustment of the rotation angle of the camera 48, so that the direction of the camera 48 can always face the upper surface of the reel paper 5 during the detection process.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A printing quality inspection mechanism for double-sided printing, comprising a symmetrically erected frame (1), characterized in that: A printing detection component (4) and a plate registration detection component (3) connected to the frame (1) are sequentially arranged between the frames (1) along the material feeding direction; a third conveying roller (13) and a second conveying roller (12) connected to the frame (1) are arranged on the left and right sides of the plate registration detection component (3) respectively; a tension adjustment component (2) connected to the frame (1) is arranged below the printing detection component (4); a first conveying roller (11) connected to the frame (1) is arranged below the tension adjustment component (2); the printing detection component (4) comprises a moving component (40) and an angle adjustment component (42); the angle adjustment component (42) is provided with a fixedly connected camera (48); the plate registration detection component (3) comprises a first detection component (31) and a second detection component (32) arranged in parallel above and below; and the plate registration detection component (3) is provided with a first electric eye (311) and a second electric eye (321) corresponding to each other above and below.

2. A printing quality inspection mechanism for double-sided printing according to claim 1, characterized in that: It also includes a tension adjustment component (2) arranged below the printing detection component (4) and connected to the frame (1), the tension adjustment component (2) comprising a tension roller (21), a fixing plate (22) and a support rod (23), the support rod (23) being transversely mounted between the frames (1) and fixedly connected to the frames (1).

3. A printing quality inspection mechanism for double-sided printing according to claim 2, characterized in that: The two ends of the support rod (23) are respectively connected to the fixed plate (22), the two ends of the tension roller (21) are respectively movably connected to the fixed plate (22), and one side of the fixed plate (22) is provided with a tension electric cylinder (24) fixedly connected to the frame (1), and the telescopic end of the tension electric cylinder (24) is movably connected to the fixed plate (22).

4. A printing quality inspection mechanism for double-sided printing according to claim 1, characterized in that: The first detection component (31) and the second detection component (32) are both provided with a first slide plate (36), a second slide plate (37), a first screw rod (39), and a first drive motor (35); the two ends of the first screw rod (39) are respectively connected to the first slide plate (36) and the second slide plate (37) near the end positions; the end of one end of the first screw rod (39) is fixedly connected to the power output shaft of the first drive motor (35); the first screw rod (39) is externally movably sleeved with a movable sleeve (30); the first screw rod (39) is provided with a first external thread (391) on its surface; and the movable sleeve (30) is internally provided with an internal thread that can cooperate with the first external thread (391).

5. A printing quality inspection mechanism for double-sided printing according to claim 4, characterized in that: The frame (1) is provided with a sliding window (38) corresponding to the positions of the first slide plate (36) and the second slide plate (37); the first slide plate (36) and the second slide plate (37) are arranged in the sliding window (38); and the sliding window (38) is provided with a sliding groove (381) capable of sliding in cooperation with the first slide plate (36) and the second slide plate (37).

6. A printing quality inspection mechanism for double-sided printing according to claim 1, characterized in that: The moving component (40) comprises a second screw rod (41), a second drive motor (43), an adjusting sleeve (44) and a connecting plate (45); the second screw rod (41) is horizontally mounted between the frames (1) and is movably connected to the frames (1); an end portion of one end of the second screw rod (41) is fixedly connected to a power output shaft of the second drive motor (43); the adjusting sleeve (44) is movably sleeved on an outer surface of the second screw rod (41); a second outer thread (411) is provided on the surface of the second screw rod (41); an inner thread that can cooperate with the second outer thread (411) is provided inside the adjusting sleeve (44); and the connecting plate (45) is vertically symmetrically arranged on a lower surface of the adjusting sleeve (44).

7. A printing quality inspection mechanism for double-sided printing according to claim 6, characterized in that: The angle adjustment component (42) further comprises a rotating motor (46), a rotating shaft (47), and a rotating sleeve (49); the rotating shaft (47) is mounted between the connecting plates (45) and is movably connected to the connecting plates (45); an end of one end of the rotating shaft (47) is connected to a power output shaft of the rotating motor (46); the rotating sleeve (49) is fixedly sleeved on the outside of the rotating shaft (47); and the camera (48) is connected to the lower surface of the rotating sleeve (49).

Images