A decorative paper printing defect detection device

Abstract

The present invention provides a decorative paper printing defect detection device, which relates to the technical field of printing defect detection. The detection device body comprises a supporting component, an extruding component and a detection component. A track is constructed on the top of the supporting component, and a winding shaft and a unwinding shaft are respectively inserted at both ends of the track. The extruding component is placed on the surface of the track, and a support plate is installed at the bottom end of the extruding component. A slider is integrally formed at the bottom of the support plate, and the slider is integrally embedded in the interior of the track. The detection component comprises a shading mechanism and a pressing mechanism. The present invention can provide a blocking structure to prevent changes in external light sources from interfering with the detection process, and the decorative paper in an undetected area can be transferred in the form of clamping and pulling. In the process, it can ensure that the decorative paper in the pulling area can be tensioned to avoid wrinkling. At the same time, it can also avoid sliding friction between the surface of the decorative paper and the shading mechanism part, thereby improving the protection effect on the surface of the decorative paper.

Description

Technical Field

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

[0002] Decorative paper plays a decorative role in the product structure, providing patterns and covering to prevent the bottom glue from seeping out. This requires the paper to have good hiding power, impregnation and printing properties. Decorative paper is prone to defects during the production and printing process, and the causes are various, including base paper characteristics, printing methods, ink characteristics, operation and adjustment of the printing machine, and environmental factors. To solve these problems, it is necessary to inspect and process the surface of the decorative paper after processing.

[0003] In the prior art, a detection device for printing defects on the surface of decorative paper is used to build a visual recognition camera to photograph the surface of the decorative paper that passes by the bottom, and then compare the photographed picture with a preset image to determine whether there is a printing defect. However, in the conventional solution, in order to avoid external optical fiber interference, it is necessary to provide a covering space for the recognition camera to shoot, so a light shield is provided in the detection area. However, this structure makes it easy for the surface of the decorative paper to be scratched when it moves to the inside of the light shield, thereby destroying the integrity of the pattern on the surface of the decorative paper and interfering with the subsequent detection process. On the other hand, during the transfer of the decorative paper, once the surface is wrinkled, it will also cause deviations in the subsequent detection results. In the prior art, changes in the speed of the decorative paper winding and unwinding equipment will cause wrinkles. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a decorative paper printing defect detection device to solve the problems raised in the above-mentioned background technology. The present invention can provide a blocking structure to prevent changes in the external light source from interfering with the detection process, and transfer the decorative paper in the undetected area by clamping and pulling. In this process, it can ensure that the decorative paper in the pulling area can be tensioned to avoid wrinkles. At the same time, it can also avoid sliding friction between the surface of the decorative paper and the shading mechanism, thereby improving the protection effect on the surface of the decorative paper.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a decorative paper printing defect detection device, including a detection device body, the detection device body including a supporting assembly, an extrusion assembly and a detection assembly, a track is built on the top of the supporting assembly, and a winding shaft and a winding shaft are respectively inserted at both ends of the track, an extrusion assembly is placed on the surface of the track, a support plate is installed at the bottom end of the extrusion assembly, a slider is integrally formed at the bottom of the support plate, and the slider is integrally embedded in the interior of the track, the detection assembly includes a shading mechanism and a pressing mechanism, the bottom of the shading mechanism is embedded in the inner side of the pressing mechanism, and pressing guide rollers are inserted at the bottom of both ends of the pressing mechanism, the pressing guide rollers are used to apply downward pressure on the surface of the extrusion assembly, a pressure rod is built above the support plate, and a rubber pad is attached to the bottom of the pressure rod.

[0006] Furthermore, end plates are welded at both ends of the track, and a screw rod is inserted between the end plates on one side of the track, a second motor is installed at the end of the screw rod, a guide rod is welded between the two end plates on the other side of the track, and a slide groove is opened on the surface of the track.

[0007] Furthermore, the outer shell of the second motor is screwed to the surface of the end plate, support plates are welded to the bottom of both ends of the track, and a gap is provided between the bottom of the winding shaft and the unwinding shaft and the surface of the track.

[0008] Furthermore, bearings are provided at both ends of the unwinding shaft and one end of the rewinding shaft, and a first motor is installed at the other end of the rewinding shaft. The surface of the first motor is welded to the side of the track through a bracket, and the two ends of the decorative paper to be tested are respectively wound on the surface of the rewinding shaft and the unwinding shaft.

[0009] Furthermore, the extrusion assembly includes a support plate and a rubber pad, the two ends of the pressure-bearing rod are integrally formed with extension plates, the bottom of the extension plate is plugged with a first spring rod, the inner side of the rubber pad is provided with a plug-in groove, and the surface of the support plate is integrally formed with a limit stop strip.

[0010] Furthermore, the surface of the support plate is used to support the decorative paper, a threaded sleeve is welded to one side of the bottom of the support plate, and a guide sleeve is welded to the other side of the bottom of the support plate, and the threaded sleeve is sleeved on the surface of the screw rod.

[0011] Furthermore, the guide sleeve is sleeved on the surface of the guide rod, the bottom end of the first spring rod is inserted into the interior of the support plate, and each first spring rod is located on the outside of the limit stop bar, the slider is embedded in the slide groove, and the number of the first spring rods is four.

[0012] Furthermore, the shading mechanism includes an electric lifting rod and a plug-in sleeve, a linkage plate is welded on the top of the plug-in sleeve, a second spring rod is inserted on the bottom of the linkage plate, and the top end of the electric lifting rod is screwed under the linkage plate.

[0013] Furthermore, an identification camera is installed at the top of the inner wall of the plug-in sleeve, and an independent light source structure is carried on the side of the identification camera. The pressing mechanism includes a cross bar and a pressure plate, and the cross bar and the pressure plate are integrally formed, and lower hanging plates are welded at both ends of the bottom of the pressure plate.

[0014] Furthermore, a pressing guide roller is inserted into the side of the lower hanging plate, and the bottom of the second spring rod is inserted into the surface of the cross bar, and the number of the second spring rods is four.

[0015] Beneficial effects of the present invention:

[0016] 1. The decorative paper printing defect detection device can press and clamp the two ends of the extrusion component on the surface of the decorative paper that has passed through the bottom in sequence through the reciprocating lifting and lowering motion of the detection component, and finally transfer the decorative paper in the undetected area by clamping and pulling. In this process, it can ensure that the decorative paper in the pulling area can be tensioned to avoid wrinkles, and also avoid the interference of wrinkles on subsequent detection results.

[0017] 2. After the decorative paper is moved to the detection area, the decorative paper printing defect detection device can control the shading mechanism to move downward, and use the shading mechanism to provide a shielding effect for the bottom decorative paper area to prevent changes in external light sources from interfering with the detection process, so that the recognized image quality remains stable.

[0018] 3. Since the decorative paper printing defect detection device drives the decorative paper to be transferred by clamping and pulling, when the decorative paper is pulled to the detection area, sliding friction between the surface of the decorative paper and the shading mechanism is avoided, and the sliding friction area is replaced, thereby improving the protection effect of the decorative paper surface and reducing the probability of scratches on the decorative paper surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the appearance of a decorative paper printing defect detection device of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the extrusion assembly part of the present invention;

[0021] Figure 3 is a schematic diagram of a support assembly portion of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the detection component part of the present invention;

[0023] Figure 5 It is a cross-sectional view of the shading mechanism part of the present invention;

[0024] Figure 6 It is a cross-sectional view of the pressing mechanism part of the present invention;

[0025] In the figure: 1. support assembly; 2. extrusion assembly; 3. detection assembly; 4. support plate; 5. limit stop bar; 6. slider; 7. threaded sleeve; 8. guide sleeve; 9. pressure rod; 10. extension plate; 11. first spring rod; 12. rubber pad; 13. plug-in slot; 14. track; 15. slide slot; 16. unwinding shaft; 17. winding shaft; 18. first motor; 19. support plate; 20. end plate; 21. second motor; 22. screw rod; 23. guide rod; 24. shading mechanism; 25. pressing mechanism; 26. electric lifting rod; 27. plug-in sleeve; 28. linkage plate; 29. ​​recognition camera; 30. second spring rod; 31. cross bar; 32. pressure plate; 33. lower hanging plate; 34. pressing guide roller. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0027] See also Figures 1 to 6 The present invention provides the following technical solutions: a decorative paper printing defect detection device, comprising a detection device body, the detection device body comprising a support component 1, a squeeze component 2 and a detection component 3, a track 14 is built on the top of the support component 1, and a reeling shaft 17 and a reeling shaft 16 are respectively inserted at both ends of the track 14, an squeeze component 2 is placed on the surface of the track 14, a support plate 4 is installed at the bottom end of the squeeze component 2, a slider 6 is integrally formed at the bottom of the support plate 4, and the slider 6 is integrally embedded in the track 14, the detection component 3 comprises a shading mechanism 24 and a pressing mechanism 25, the bottom of the shading mechanism 24 is embedded in the inner side of the pressing mechanism 25, and pressing guide rollers 34 are inserted at the bottom of both ends of the pressing mechanism 25, and the pressing guide rollers 34 are used to apply downward pressure to the surface of the squeeze component 2, a pressure rod 9 is built above the support plate 4, and a rubber pad 12 is attached to the bottom of the pressure rod 9. The decorative paper printing defect detection device is used to identify and detect the surface pattern of the decorative paper that has moved over the bottom.

[0028] When the present invention is used, the decorative paper to be tested is wound on the surface of the unwinding shaft 16, and is passed through the middle of the squeezing assembly 2 until the other end of the decorative paper is wound on the surface of the winding shaft 17. At this time, the second motor 21 on the supporting assembly 1 can be started first, and the electric lifting rod 26 in the detecting assembly 3 can be controlled to move downward at the same time, until the bottom of the detecting assembly 3 is pressed against one end of the squeezing assembly 2, and the end of the squeezing assembly 2 is pressed downward against the surface of the bottom decorative paper. At this time, the second motor 21 can drive the squeezing assembly 2 to move. As the squeezing assembly 2 moves, the range of pressure applied by the detected assembly 3 will gradually increase until the other end is also provided with uniform pressure. In this process, pressure can be applied from one end, and as the squeezing clamping force is generated on the bottom decorative paper, the pressure can be increased. The decorative paper is pulled by holding effect, and the tensioning effect of the decorative paper is achieved during the pulling process until the extrusion component 2 is completely moved to the area directly below the detection component 3. At this time, the electric lifting rod 26 is started again to move the plug-in sleeve 27 in the detection component 3 downward to achieve the docking process with the extrusion component 2, so that the decorative paper area corresponding to the surface of the extrusion component 2 forms a closed cavity, and the pattern of the decorative paper surface in this area can be collected inside the cavity with the help of an independent fixed light source and an identification camera 29. After comparing the captured image with the standard image, it can be determined whether there are printing defects. After completing the inspection, the electric lifting rod 26 is lifted again to synchronously reset and lift the extrusion component 2, and the first motor 18 is started to roll up the decorative paper after the inspection.

[0029] In this embodiment, end plates 20 are welded at both ends of the track 14, and a screw rod 22 is inserted between the end plates 20 on one side of the track 14, a second motor 21 is installed at the end of the screw rod 22, a guide rod 23 is welded between the two end plates 20 on the other side of the track 14, and a slide groove 15 is provided on the surface of the track 14. The outer shell of the second motor 21 is screwed to the surface of the end plate 20, support plates 19 are welded to the bottom of both ends of the track 14, and a gap is provided between the bottom of the winding shaft 17 and the unwinding shaft 16 and the surface of the track 14. Both ends of the unwinding shaft 16 and one end of the winding shaft 17 are sleeved with bearings, and the other end of the winding shaft 17 is installed with a first motor 18, and the surface of the first motor 18 is welded to the side of the track 14 through a bracket, and the two ends of the decorative paper to be tested are respectively wound on the surface of the winding shaft 17 and the unwinding shaft 16. Through the reciprocating lifting and lowering motion of the detection component 3, in cooperation with the extrusion component 2, the two ends of the extrusion component 2 can be pressed and clamped in sequence on the surface of the decorative paper that has passed the bottom, and finally the decorative paper in the undetected area can be moved by clamping and pulling. In this process, it can be ensured that the decorative paper in the pulling area can be tensioned to avoid wrinkles, and the interference of wrinkles on subsequent detection results can be avoided.

[0030] Specifically, the first motor 18 drives the reeling shaft 17 to rotate, so that the decorative paper part that has completed the inspection can be reeled in, and the unwinding shaft 16 part does not provide any power to ensure that when the decorative paper is squeezed and pushed by the detection component 3 and the extrusion component 2, the pulling force applied at the end can be gradually changed to uniformly applying pressure to a rectangular area, thereby ensuring that the process can form an extrusion effect around the covered decorative paper to avoid wrinkles.

[0031] In this embodiment, the extrusion assembly 2 includes a support plate 4 and a rubber pad 12. The two ends of the pressure rod 9 are integrally formed with an extension plate 10. The bottom of the extension plate 10 is plugged with a first spring rod 11. The inner side of the rubber pad 12 is provided with a plug-in slot 13. The surface of the support plate 4 is integrally formed with a limit stop bar 5. The surface of the support plate 4 is used to support the decorative paper. A threaded sleeve 7 is welded on one side of the bottom of the support plate 4, and a guide sleeve 8 is welded on the other side of the bottom of the support plate 4. The threaded sleeve 7 is sleeved on the surface of the screw rod 22. The guide sleeve 8 is sleeved on the surface of the guide rod 23. The bottom end of the first spring rod 11 is inserted into the interior of the support plate 4, and each first spring rod 11 is located on the outside of the limit stop bar 5. The slider 6 is embedded in the slide groove 15. The number of the first spring rods 11 is four. After the decorative paper is moved to the detection area, the shading mechanism 24 can be controlled to move downward, and the shading mechanism 24 can be used to provide a shielding effect for the bottom decorative paper area to prevent changes in external light sources from interfering with the detection process, so that the recognized image quality remains stable.

[0032] Specifically, after the detection component 3 moves downward, it will first press on one end of the pressure rod 9. At this time, the position moves downward, the first spring rod 11 below the end is contracted, and the rubber pad 12 moves downward. Finally, pressure is applied only to the surface of the decorative paper below the end, and the decorative paper is pressed and clamped with the help of the rubber pad 12 and the bottom support plate 4. With the subsequent pulling of the extrusion component 2, the range of pressure applied by the detection component 3 to the pressure component gradually expands toward the other section of the pressure rod 9 until the entire rubber pad 12 is pressed against the decorative paper surface at the bottom. At this time, the decorative paper area can be completely surrounded by the rubber pad 12, and finally, the top of the plug-in sleeve 27 that moves downward again at the top is also covered to form a sealed cavity. Image recognition is performed inside the cavity to avoid interference from external light sources.

[0033] In this embodiment, the shading mechanism 24 includes an electric lifting rod 26 and a plug-in sleeve 27. A linkage plate 28 is welded to the top of the plug-in sleeve 27. A second spring rod 30 is inserted at the bottom of the linkage plate 28. The top of the electric lifting rod 26 is screwed to the bottom of the linkage plate 28. A recognition camera 29 is installed at the top of the inner wall of the plug-in sleeve 27. An independent light source structure is mounted on the side of the recognition camera 29. The pressing mechanism 25 includes a cross bar 31 and a pressure plate 32. The cross bar 31 and the pressure plate 32 are integrally formed. A lower hanging plate 33 is welded at both ends of the bottom of the pressure plate 32. A pressing guide roller 34 is inserted at the side of the lower hanging plate 33. The bottom of the second spring rod 30 is inserted on the surface of the cross bar 31. The number of the second spring rods 30 is four. Since the decorative paper is moved by clamping and pulling, sliding friction between the surface of the decorative paper and the shading mechanism 24 is avoided during the process of pulling the decorative paper to the detection area, and the sliding friction area is replaced, thereby improving the protection effect of the decorative paper surface and reducing the probability of scratches on the decorative paper surface.

[0034] Specifically, since the rubber pad 12 and the plug-in sleeve 27 provide a closed cavity to improve the uniformity and effectiveness of image recognition, during the transfer process, the electric lifting rod 26 is moved downward to pull the plug-in sleeve 27 downward. The plug-in sleeve 27 first moves the cross bar 31 and the pressure plate 32 downward through the second spring rod 30 until the pressing guide roller 34 at the bottom of the pressure plate 32 is pressed on the pressure rod 9. Therefore, after the decorative paper is squeezed by the rubber pad 12, the second motor 21 is started to squeeze and pull the decorative paper, and the surface of the decorative paper will no longer have sliding friction with the rubber pad 12, thus avoiding the problem of friction scratches. After the subsequent detection is completed, the detected area can be directly rolled up.

[0035] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A decorative paper printing defect detection device, comprising a detection device body, characterized in that: The detection device body comprises a support component (1), an extrusion component (2) and a detection component (3); a track (14) is built on the top of the support component (1); a reeling shaft (17) and a reeling shaft (16) are respectively inserted at both ends of the track (14); an extrusion component (2) is placed on the surface of the track (14); a support plate (4) is installed at the bottom end of the extrusion component (2); a slider (6) is integrally formed at the bottom of the support plate (4); the slider (6) is integrally embedded in the track (14); the detection component (3) comprises a shading mechanism (24) and a pressing mechanism (25); the bottom of the shading mechanism (24) is embedded in the inner side of the pressing mechanism (25); and the bottoms of the two ends of the pressing mechanism (25) are inserted A pressing guide roller (34) is provided, and the pressing guide roller (34) is used to apply downward pressure to the surface of the extrusion component (2); a pressure rod (9) is built above the support plate (4), and a rubber pad (12) is attached to the bottom of the pressure rod (9); end plates (20) are welded at both ends of the track (14), and a screw rod (22) is inserted between the end plates (20) on one side of the track (14); a second motor (21) is installed at the end of the screw rod (22); a guide rod (23) is welded between the two end plates (20) on the other side of the track (14); a slide groove (15) is provided on the surface of the track (14), and the outer shell of the second motor (21) is screwed to the surface of the end plate (20); Support plates (19) are welded at the bottom of both ends, a gap is provided between the bottom of the reeling shaft (17) and the reeling shaft (16) and the surface of the track (14), both ends of the reeling shaft (16) and one end of the reeling shaft (17) are sleeved with bearings, a first motor (18) is installed at the other end of the reeling shaft (17), the surface of the first motor (18) is welded to the side of the track (14) through a bracket, the two ends of the decorative paper to be tested are respectively wound on the surface of the reeling shaft (17) and the reeling shaft (16), the extrusion assembly (2) comprises a support plate (4) and a rubber pad (12), the two ends of the pressure bearing rod (9) are integrally formed with extension plates (10), the bottom of the extension plate (10) is plugged with a first spring rod (11), the An insertion groove (13) is provided on the inner side of the rubber pad (12); a limit stop bar (5) is integrally formed on the surface of the support plate (4); the surface of the support plate (4) is used to support the decorative paper; a threaded sleeve (7) is welded on one side of the bottom of the support plate (4); a guide sleeve (8) is welded on the other side of the bottom of the support plate (4); the threaded sleeve (7) is sleeved on the surface of the screw rod (22); the guide sleeve (8) is sleeved on the surface of the guide rod (23); the bottom end of the first spring rod (11) is inserted into the interior of the support plate (4); each first spring rod (11) is located on the outside of the limit stop bar (5); the slider (6) is embedded in the interior of the slide groove (15); and the number of the first spring rods (11) is four.

2. The decorative paper printing defect detection device according to claim 1, characterized in that: The shading mechanism (24) comprises an electric lifting rod (26) and a plug-in sleeve (27); a linkage plate (28) is welded to the top of the plug-in sleeve (27); a second spring rod (30) is inserted into the bottom of the linkage plate (28); and the top end of the electric lifting rod (26) is screwed to the bottom of the linkage plate (28).

3. The decorative paper printing defect detection device according to claim 2, characterized in that: An identification camera (29) is installed at the top of the inner wall of the plug-in sleeve (27), and an independent light source structure is mounted on the side of the identification camera (29). The pressing mechanism (25) comprises a cross bar (31) and a pressing plate (32), and the cross bar (31) and the pressing plate (32) are integrally formed, and lower hanging plates (33) are welded to both ends of the bottom of the pressing plate (32).

4. The decorative paper printing defect detection device according to claim 3, characterized in that: A pressing guide roller (34) is inserted into the side of the lower hanging plate (33), and the bottom of the second spring rod (30) is inserted into the surface of the cross rod (31). The number of the second spring rods (30) is four.

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