A paper film laminating machine set position deviation detection device and set position deviation reduction method

Abstract

The present invention discloses a device for detecting the positioning deviation of a paper-film composite machine and a method for reducing the positioning deviation, and belongs to the field of anti-counterfeiting packaging technology. According to the principle of three-point imaging, it is designed as three movable cameras, and the lens is provided with a detection icon corresponding to the positioning detection icon on the film. After the composite paper film, since the nickel plate has a positioning detection icon, the positioning detection icon is also synchronized on the positioning laser film after molding. The camera is used to obtain the positioning icon on the laser paper, and then the marking point on the lens is aligned with the marking point on the paper, so as to achieve the purpose of real-time detection of the roll positioning paper. The present invention can detect the positioning deviation in the production process in real time, and more clearly observe the adjustment direction of the finished paper size, which is convenient for the operator to correct the product size, ensure that the positioning accuracy of the positioning paper is within the qualified range, and further improve the quality requirements of the product.

Description

Technical Field

[0001] The present invention belongs to the technical field of anti-counterfeiting packaging, and more specifically, relates to a device for detecting a nesting deviation of a paper-film composite machine and a method for reducing the nesting deviation. Background Art

[0002] With the widespread adoption of positioning paper, the high-end packaging paper industry has seen the benefits of using photolithographic element graphics instead of traditional hot stamping and embossing processes. This not only saves on hot stamping steps but also significantly reduces the use of raw materials such as anodized aluminum. While maintaining the product's superior three-dimensional element graphics, it also improves manufacturing efficiency. With the continuous advancement of technology in the packaging industry, the production and printing of simple positioning paper is no longer a bottleneck. Compared to standard single-sheet positioning paper, roll-type positioning paper offers higher printing efficiency and maintains the same anti-counterfeiting effect. However, roll-type positioning paper places particularly high demands on the spacing and positioning of individual elements, and requires consistent registration deviation across the entire roll.

[0003] In the past, when producing roll-to-roll positioning paper products, the only way to adjust the size deviation was to set the pitch. However, the size of the positioning laser film varies, and the soft nature of PET film makes it difficult to monitor in real time. Moreover, any intermittent instability during roll printing will result in increased waste. Therefore, achieving uniform size in the composite finished product can greatly enhance product competitiveness. Summary of the Invention

[0004] In view of the defects of the prior art, the purpose of the present invention is to provide a paper-film laminating machine positioning deviation detection device and positioning deviation reduction method, aiming to solve the size deviation problem in the process of roll positioning paper.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a device for detecting position deviation of a paper-film laminating machine, comprising:

[0006] 3 cameras, the camera's shooting speed is not lower than the operating speed of the compound machine, and the lens is provided with a detection icon of the same type as the positioning detection icon on the film, with the center point and extension direction consistent;

[0007] A slideway, the length of which is not less than the width of the positioning paper, the width of which is not less than the spacing of the positioning paper, and the horizontal and vertical directions of the slideway are both provided with scales with an accuracy of millimeters;

[0008] Image display, used to display the images captured by three cameras at fixed points, so as to compare the lateral and longitudinal deviations between the positioning detection icon on the composite film and the detection icon on the camera lens;

[0009] The slide can be installed at the paper output position of the compound machine oven, and the three cameras are fixed on the slide so that their photographing surfaces are parallel to the paper feeding surface of the compound machine, including: the first camera is fixed on the slide, and the fixed position is the same as the positioning base point orientation of the paper to be detected; the second camera is fixed in the horizontal longitudinal direction of the slide, and the fixed position can be adjusted along the longitudinal direction of the slide; the third camera is fixed in the horizontal transverse direction of the slide, and the fixed position can be adjusted along the sliding transverse direction.

[0010] Preferably, the camera is a stroboscopic camera.

[0011] Preferably, the camera lens is additionally equipped with a lens with millimeter scale.

[0012] It should be noted that after adding, the error can be adjusted through photo comparison.

[0013] Preferably, the positioning detection icon is a cross mark or

[0014] Preferably, the slide is fixed at the paper discharge position of the compound machine oven through a fixing bracket.

[0015] To achieve the above-mentioned object, in a second aspect, the present invention provides a paper-film laminating machine, wherein the paper-film laminating machine comprises the paper-film laminating machine nesting deviation detection device as described in the first aspect.

[0016] To achieve the above-mentioned object, in a third aspect, the present invention provides a method for reducing nesting deviation of a paper-film laminating machine as described in the second aspect, the method comprising:

[0017] S1. Sample Inspection: First, laminate the positioning laser film and paper. Use target film to inspect the finished product size. Adjust the finished product size to within the acceptable range and measure the horizontal and vertical distances of the inspection icons.

[0018] S2. Camera Coarse Adjustment: After the MFP starts running and the paper is straightened, move each camera to the vicinity of the positioning detection icon;

[0019] S3. Camera fixed-point capture: During the paper and film composite process, three cameras are used to capture the positioning detection icon on the film, and three pictures containing the positioning detection icon and the detection icon on the camera are obtained;

[0020] S4. Camera fine-tuning: Fine-tune the camera position until the deviation between the positioning detection icon and the detection icon on the camera in the captured image is within the allowable range;

[0021] S5. Adjust the parameters of the multifunction device until the deviation between the positioning detection icon in the captured image and the detection icon on the camera is within the allowable range.

[0022] Preferably, in step S4, the camera fine-tuning method is specifically as follows:

[0023] First, adjust the reference camera to coincide with the reference point on the finished paper, and then gradually adjust the position of the horizontal and vertical cameras according to the distance between the horizontal and vertical detection icons until the same-direction deviation of the positioning icons in the captured image fluctuates within the allowable range. The camera adjustment stops.

[0024] Preferably, in step S5, the adjustment method of the multifunction machine parameters is as follows:

[0025] Compare the images taken by the first camera and the second camera. If the icon horizontal lines in the lens are both higher than the finished product horizontal line and the deviation exceeds the allowable range, it means that the film is not stretched enough and the laminating machine should increase the film unwinding tension. If the icon horizontal line in the image taken by the first camera is lower than the finished product horizontal line, and the icon horizontal line in the image taken by the second camera is higher than the finished product horizontal line, the film is not stretched enough and the laminating machine should increase the film unwinding tension. Otherwise, the film unwinding tension needs to be reduced.

[0026] Compare the pictures taken by the first camera and the third camera. If the longitudinal lines of the icons in the lens are both to the left of the longitudinal line of the finished product and exceed the allowable range, it means that the film is too large in the horizontal direction. The laminator oven temperature should be increased or the film unwinding tension should be appropriately increased. If the longitudinal line in the picture taken by the first camera is to the right, while the picture taken by the third camera is to the left, the temperature of the laminator should be increased. Otherwise, the temperature should be lowered.

[0027] It should be noted that by taking a photo of the detection icon on the positioning paper and comparing the difference between the icon on the paper and the icon on the camera lens, the horizontal and vertical deviations can be analyzed. The above method is preferred. The unwinding tension and oven temperature are adjusted by comparing the differences to control product quality during the manufacturing process.

[0028] Preferably, the allowable range of deviation is ±0.3 mm.

[0029] In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:

[0030] The present invention provides a device for detecting registration deviations in a paper-film laminating machine. Based on the principle of three-point imaging, the device is designed with three movable cameras. The lenses are equipped with detection icons corresponding to the registration detection icons on the films. After laminating, the nickel plate on the paper-film has registration detection icons, and the registration detection icons are also synchronized on the molded registration laser film. The cameras capture the registration icons on the laser paper, and then align the marked points on the lens with the marked points on the paper, achieving real-time detection of roll registration deviations. The present invention can detect registration deviations in real time during the production process, clearly observing the adjustment direction of the finished paper size, facilitating operator correction of product size, ensuring that the registration accuracy of the registration paper is within an acceptable range, and further improving product quality requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The present invention provides a schematic diagram of a device for detecting position deviation of a paper-film laminating machine.

[0032] Figure 2 Schematic diagram of a nickel plate provided in an embodiment of the present invention.

[0033] Figure 3 Schematic diagram of a camera lens provided by an embodiment of the present invention.

[0034] Figure 4 Schematic diagram of the coarse adjustment position of the camera provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] like Figure 1 The present invention provides a device for detecting position deviation of a paper-film laminating machine, comprising:

[0037] 3 cameras, the camera's shooting speed is not lower than the operating speed of the compound machine, and the lens is provided with a detection icon of the same type as the positioning detection icon on the film, with the center point and extension direction consistent;

[0038] A slideway, the length of which is not less than the width of the positioning paper, the width of which is not less than the spacing of the positioning paper, and the horizontal and vertical directions of the slideway are both provided with scales with an accuracy of millimeters;

[0039] Image display, used to display the images captured by three cameras at fixed points, so as to compare the lateral and longitudinal deviations between the positioning detection icon on the composite film and the detection icon on the camera lens;

[0040] The slide can be installed at the paper output position of the compound machine oven, and the three cameras are fixed on the slide so that their photographing surfaces are parallel to the paper feeding surface of the compound machine, including: the first camera is fixed on the slide, and the fixed position is the same as the positioning base point orientation of the paper to be detected; the second camera is fixed in the horizontal longitudinal direction of the slide, and the fixed position can be adjusted along the longitudinal direction of the slide; the third camera is fixed in the horizontal transverse direction of the slide, and the fixed position can be adjusted along the sliding transverse direction.

[0041] Preferably, the camera is a stroboscopic camera.

[0042] Preferably, the camera lens is additionally equipped with a lens with millimeter scale.

[0043] Preferably, the positioning detection icon is a cross mark or

[0044] Preferably, the slide is fixed at the paper discharge position of the compound machine oven through a fixing bracket.

[0045] Example

[0046] When designing nickel plates, make sure the following on the plate: Figure 2 The positioning detection icon is shown.

[0047] The camera is a specific stroboscopic camera, and the shooting frequency is sufficient to capture paper at a speed of 100m / min-120m / min. Figure 3 As shown, the external lens of the camera lens is set to have an icon corresponding to the detection icon and is connected to the image display.

[0048] The camera is arranged on a slideway that can be precisely adjusted in the horizontal and vertical directions, and the camera can be fixed (for example, locked with a nut) on the slideway.

[0049] The positioning laser film is an anti-counterfeiting film with a synchronized layout effect produced by nickel plate molding. If the nickel plate has a positioning detection icon, the laser film will also have this effect, preparing for later camera photography.

[0050] like Figure 4 As shown, the device with the camera is installed at the paper exit position of the laminating machine oven. The camera's photographing surface is parallel to the paper feeding surface. The paper here has been formed, which is convenient for photographing and comparative observation.

[0051] Before production, adjust the camera to the position of the fixed-point detection icon on the paper according to the size of the paper layout (moving within the flat slide). Because the positioning paper is designed as a regular rectangle, the present invention is designed with three movable cameras based on the principle of three-point imaging. When laminating the paper and film, after adjusting the positioning paper to the optimal size, move the camera to the detection icon position, debug and capture the detection icon with a camera. During the operation of the laminating machine, continue to fine-tune the camera so that the icon on the lens coincides with the detection icon on the paper. The fluctuation range is set according to the specific requirements of the positioning paper. First adjust the camera in the lower right corner, which serves as the reference point, and then adjust the other two in sequence.

[0052] During the compounding process, the positioning laser films to be compounded have different sizes and unpredictable deviations. In the past, in normal production, the only way was to wait until the paper was produced and then select the paper according to the actual size. The stroboscopic camera in the device mentioned in the present invention will take a fixed-point photo of the positioning paper during the compounding process. When the image is transmitted to the display, the operator can observe the deviation between the detection pattern on the lens and the detection pattern on the actual paper. For example, when the size is distorted or shrinks or expands horizontally or vertically, the machine parameters are adjusted according to the angle of the deviation to ensure that the positioning size meets the standard and remains consistent. The device is equipped with a deviation warning device, which can be set to issue an alarm when the deviation range exceeds a certain value.

[0053] On the basis of the above, the present invention provides a paper-film laminating machine, which includes the above-mentioned paper-film laminating machine nesting deviation detection device.

[0054] Correspondingly, the present invention provides a method for reducing nesting deviation of a paper-film laminating machine, the method comprising:

[0055] S1. Sample Inspection: First, laminate the positioning laser film and paper. Use target film to inspect the finished product size. Adjust the finished product size to within the acceptable range and measure the horizontal and vertical distances of the inspection icons.

[0056] S2. Camera Coarse Adjustment: After the MFP starts running and the paper is straightened, move each camera to the vicinity of the positioning detection icon;

[0057] S3. Camera fixed-point capture: During the paper and film composite process, three cameras are used to capture the positioning detection icon on the film, and three pictures containing the positioning detection icon and the detection icon on the camera are obtained;

[0058] S4. Camera fine-tuning: Fine-tune the camera position until the deviation between the positioning detection icon and the detection icon on the camera in the captured image is within the allowable range;

[0059] S5. Adjust the parameters of the multifunction device until the deviation between the positioning detection icon in the captured image and the detection icon on the camera is within the allowable range.

[0060] Preferably, in step S4, the camera fine-tuning method is specifically as follows:

[0061] First, adjust the reference camera to coincide with the reference point on the finished paper, and then gradually adjust the position of the horizontal and vertical cameras according to the distance between the horizontal and vertical detection icons until the same-direction deviation of the positioning icons in the captured image fluctuates within the allowable range. The camera adjustment stops.

[0062] Preferably, in step S5, the adjustment method of the multifunction machine parameters is as follows:

[0063] Compare the images taken by the first camera and the second camera. If the icon horizontal lines in the lens are both higher than the finished product horizontal line and the deviation exceeds the allowable range, it means that the film is not stretched enough and the laminating machine should increase the film unwinding tension. If the icon horizontal line in the image taken by the first camera is lower than the finished product horizontal line, and the icon horizontal line in the image taken by the second camera is higher than the finished product horizontal line, the film is not stretched enough and the laminating machine should increase the film unwinding tension. Otherwise, the film unwinding tension needs to be reduced.

[0064] Compare the pictures taken by the first camera and the third camera. If the longitudinal lines of the icons in the lens are both to the left of the longitudinal line of the finished product and exceed the allowable range, it means that the film is too large in the horizontal direction. The laminator oven temperature should be increased or the film unwinding tension should be appropriately increased. If the longitudinal line in the picture taken by the first camera is to the right, while the picture taken by the third camera is to the left, the temperature of the laminator should be increased. Otherwise, the temperature should be lowered.

[0065] Preferably, the allowable range of deviation is ±0.3 mm.

[0066] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for detecting position deviation of a paper-film laminating machine, characterized in that: include: 3 cameras, the camera's shooting speed is not lower than the operating speed of the compound machine, and the lens is provided with a detection icon of the same type as the positioning detection icon on the film, with the center point and extension direction consistent; A slideway, the length of which is not less than the width of the positioning paper, the width of which is not less than the spacing of the positioning paper, and the horizontal and vertical directions of the slideway are both provided with scales with an accuracy of millimeters; Image display, used to display the images captured by three cameras at fixed points, so as to compare the lateral and longitudinal deviations between the positioning detection icon on the composite film and the detection icon on the camera lens; The slide can be installed at the paper output position of the compound machine oven, and the three cameras are fixed on the slide so that their photographing surfaces are parallel to the paper feeding surface of the compound machine, including: the first camera is fixed on the slide, and the fixed position is the same as the positioning base point orientation of the paper to be detected; the second camera is fixed in the horizontal longitudinal direction of the slide, and the fixed position can be adjusted along the longitudinal direction of the slide; the third camera is fixed in the horizontal transverse direction of the slide, and the fixed position can be adjusted along the sliding transverse direction.

2. The device according to claim 1, wherein The camera is a stroboscopic camera.

3. The device according to claim 2, wherein The camera lens is additionally provided with a lens with millimeter scale.

4. The device according to claim 1, wherein The positioning detection icon is a cross mark or 5. The device according to claim 1, wherein The slide is fixed at the paper output position of the compound machine oven through a fixing bracket.

6. A paper-film laminating machine, characterized in that: The paper-film laminating machine includes the paper-film laminating machine nesting deviation detection device according to any one of claims 1 to 5.

7. A method for reducing nesting deviation of a paper-film laminating machine according to claim 6, characterized in that: The method includes: S1. Sample Inspection: First, laminate the positioning laser film and paper. Use target film to inspect the finished product size. Adjust the finished product size to within the acceptable range and measure the horizontal and vertical distances of the inspection icons. S2. Camera Coarse Adjustment: After the MFP starts running and the paper is straightened, move each camera to the vicinity of the positioning detection icon; S3. Camera fixed-point capture: During the paper and film composite process, three cameras are used to capture the positioning detection icon on the film, and three pictures containing the positioning detection icon and the detection icon on the camera are obtained; S4. Camera fine-tuning: Fine-tune the camera position until the deviation between the positioning detection icon and the detection icon on the camera in the captured image is within the allowable range; S5. Adjust the parameters of the multifunction device until the deviation between the positioning detection icon in the captured image and the detection icon on the camera is within the allowable range.

8. The method according to claim 7, wherein In step S4, the camera is fine-tuned as follows: First, adjust the reference camera to coincide with the reference point on the finished paper, and then gradually adjust the position of the horizontal and vertical cameras according to the distance between the horizontal and vertical detection icons until the same-direction deviation of the positioning icons in the captured image fluctuates within the allowable range. The camera adjustment stops.

9. The method according to claim 7, wherein In step S5, the adjustment method of the multifunction device parameters is as follows: Compare the images taken by the first camera and the second camera. If the icon horizontal lines in the lens are both higher than the finished product horizontal line and the deviation exceeds the allowable range, it means that the film is not stretched enough and the laminating machine should increase the film unwinding tension. If the icon horizontal line in the image taken by the first camera is lower than the finished product horizontal line, and the icon horizontal line in the image taken by the second camera is higher than the finished product horizontal line, the film is not stretched enough and the laminating machine should increase the film unwinding tension. Otherwise, the film unwinding tension needs to be reduced. Compare the pictures taken by the first camera and the third camera. If the longitudinal lines of the icons in the lens are both to the left of the longitudinal line of the finished product and exceed the allowable range, it means that the film is too large in the horizontal direction. The laminator oven temperature should be increased or the film unwinding tension should be appropriately increased. If the longitudinal line in the picture taken by the first camera is to the right, while the picture taken by the third camera is to the left, the temperature of the laminator should be increased. Otherwise, the temperature should be lowered.

10. The method according to claim 7, wherein: The allowable deviation range is ±0.3mm.

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