Online defect detection device for die-cutting machine

Abstract

The invention discloses an online defect detection device for a die-cutting machine, and relates to the field of die-cutting machine detection.The online defect detection device comprises a mounting frame and a detection box, the detection box is fixed to the mounting frame, a detection mechanism is fixed to the left side in the detection box, and a material receiving mechanism is fixed to the right side in the detection box; the material collecting mechanism comprises a fixing plate, a second air cylinder, a collecting box, a shovel plate, a rolling shaft, a transmission gear and a composite wheel, the fixing plate is fixed in the detection box, and a pressing mechanism is installed on the fixing plate. According to the online defect detection device for the die-cutting machine, the material collecting mechanism is adopted, when defective products are detected, the defective products can be automatically collected, continuous operation of the device is guaranteed, and the detection effect is improved, specifically, when the defective products are detected, a collecting box, a shovel plate, a rolling shaft and a transmission gear are driven by a second air cylinder to move downwards, and the defective products are automatically detected. And defective products can automatically enter the collecting box to be collected under the rolling action of the rolling shaft, so that follow-up treatment is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of die-cutting machine detection, and in particular to an online defect detection device for a die-cutting machine. Background Art

[0002] In the die-cutting process in the field of printed matter packaging, operators are prone to make mistakes when conveying printed matter, causing the die-cutting machine to cut the printed matter badly, resulting in defective printed matter, and even causing batch quality accidents when it flows into the market. Therefore, it is necessary to use a detection device to perform quality inspection on the die-cut products;

[0003] Existing die-cutting machine online defect detection devices, such as a die-cutting machine online defect detection device and method with publication number CN114486937B, can more comprehensively detect defects of printed paper during the die-cutting process by photographing the printed paper image when the printed paper is stationary, and comparing the graphic information and code information and graphic position information in the printed paper image and the standard printed image, with a higher detection efficiency;

[0004] During actual use of the above-mentioned existing die-cutting machine detection device, when defective products are detected, the defective products cannot be collected and the machine needs to be stopped for manual removal, which affects the detection efficiency. Therefore, in view of the above problem, an online defect detection device for a die-cutting machine is designed to better meet actual use needs. Summary of the invention

[0005] The object of the present invention is to provide an online defect detection device for a die-cutting machine to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an online defect detection device for a die-cutting machine, comprising a mounting frame and a detection box, the detection box is fixed on the mounting frame, a detection mechanism is fixed on the left side of the detection box, a material receiving mechanism is fixed on the right side of the detection box, the material receiving mechanism comprises a fixed plate, a second cylinder, a collection box, a shovel plate, a roller, a transmission gear and a compound wheel, the fixed plate is fixed in the detection box, a clamping mechanism is installed on the fixed plate, the second cylinder is symmetrically fixed on the fixed plate, the collection box is fixed at the output end of the second cylinder, a shovel plate is obliquely fixed on the left side of the collection box, and the shovel plate contacts and slides with the conveyor belt, the collection box is also connected to a roller with a bearing, and the roller is symmetrically fixed on the roller A transmission gear is fixed, and a composite wheel is also connected to the collection box with a bearing. The composite wheel is composed of a gear and a roller, and the gear on the composite wheel is meshed with the transmission gear for transmission. At the same time, the lower end surface of the roller on the composite wheel is flush with the lower end surface of the shovel plate. During the product inspection process, when it is detected that the product is unqualified, the shovel plate and the transmission gear are extended by the second cylinder to move down, so that the shovel plate and the roller on the composite wheel are in contact with the conveyor belt. At this time, the product moves to the shovel plate under the action of the conveyor belt, and the transmission action of the gear on the composite wheel and the transmission gear makes the roller roll, and the product on the shovel plate is transported to the collection box for storage, and the defective products collected in the collection box are compacted by the compacting mechanism, and then the defective products are marked by the marking mechanism.

[0007] Preferably, a motor is fixed on the mounting frame, and a conveyor roller is fixed on the output end of the motor, and the conveyor roller bearing is connected to the mounting frame, and the conveyor roller and the conveyor belt are connected to each other. Through the above structure, a basic guarantee can be provided for the normal transportation of the product.

[0008] Preferably, a transparent observation window is installed on the front door of the detection box, and a control panel is also installed on the front door of the detection box, and a pallet is fixed in the detection box, and the pallet is in contact with the conveyor belt. Through the transparent observation window, the staff can conveniently observe whether the device is operating normally.

[0009] Preferably, the detection mechanism includes a mounting plate, an industrial camera, a first cylinder, a light board, a fill light, a reflector, a first gear and a convex rack. The mounting plate is fixed on the left side of the detection box, and the industrial camera is fixed on the lower end surface of the mounting plate, and the industrial camera is interconnected with the control processing module. Through the action of the industrial camera, the graphic information of the product can be collected, providing a basic guarantee for realizing product detection.

[0010] Preferably, a first cylinder is symmetrically fixed to the front and rear of the lower end surface of the mounting plate, a light board is fixed to the output end of the first cylinder, and a fill light is evenly fixed to the lower end surface of the light board. The fill light can realize the fill light effect and ensure the clarity of the image and text information captured by the industrial camera.

[0011] Preferably, the mounting plate is connected to a reflective plate on a bearing, and a first gear is symmetrically fixed on the reflective plate front and back, and the first gear is meshed with a convex rack, and the convex rack is fixed to the lower end surface of the mounting plate. Through the meshing action between the first gear and the convex rack, the inclination angle of the reflective plate can be adjusted, thereby achieving a focusing effect, providing a basic guarantee for achieving brightness adjustment of the fill light.

[0012] Preferably, the clamping mechanism includes a pressure plate, a sliding rod, a first spring, a pressure sensor and a bracket. The pressure plate is arranged in a collection box, and sliding rods are symmetrically fixed on the pressure plate front and back, and the sliding rods are slidingly connected to the fixed plate. At the same time, a first spring is also fixed between the pressure plate and the fixed plate. A marking mechanism is installed on the pressure plate. Through the elastic action of the first spring, a force can be provided to the pressure plate, thereby providing a basic guarantee for the clamping of the collected defective products, and further ensuring the normal operation of the device.

[0013] Preferably, a pressure sensor is arranged directly above the sliding rod, and the pressure sensor is fixed on a bracket, and the bracket is fixed on a fixed plate, and the pressure sensor is interconnected with the control processing module. Through the above structure, after a certain number of defective products are collected, pressure can be generated on the pressure sensor through the sliding rod, and a signal can be output to remind the staff to handle the defective products.

[0014] Preferably, the marking mechanism includes a cross bar, a slider, a connecting rod, a counterweight, a push rod, a vertical rod, a second spring and a marking pen. The cross bar is fixed on the pressure plate, and the slider is slidably connected to the cross bar, and the slider is rotatably connected to one end of the connecting rod, while the other end of the connecting rod is rotatably connected to the counterweight. A push rod is fixed to the lower end surface of the counterweight, and the push rod is slidably connected to the pressure plate. Through the above structure, when the push rod is in contact with the product and moves upward under force, a basic force can be provided for the movement of the slider, thereby providing a basic guarantee for the marking of defective products.

[0015] Preferably, the slider is slidably connected to a vertical rod, and a second spring is fixed between the vertical rod and the slider, and a marker pen is fixed to the lower end of the vertical rod, while the lower end surface of the marker pen is flush with the lower end surface of the top rod. Through the action of the second spring, a force can be provided for the marker pen to ensure that there is a certain pressure when the marker pen contacts the product, thereby ensuring that when the marker pen moves, it can clearly mark the product to avoid confusion between defective products and qualified products.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The die-cutting machine online defect detection device adopts a material collection mechanism, which can automatically collect defective products when defective products are detected, ensuring the continuous operation of the device and improving the detection effect. Specifically, when defective products are detected, the second cylinder drives the collection box, shovel plate, roller and transmission gear to move downward, so that the defective products can automatically enter the collection box for collection under the rolling action of the roller for subsequent processing;

[0018] 2. The die-cutting machine online defect detection device adopts an adjustable fill light mechanism, which can adjust the fill light intensity according to the actual detection needs, so as to better meet the detection needs. Specifically, the product detection function is realized through the industrial camera, and the fill light is used for fill light. When the fill light intensity needs to be changed, the first cylinder, the light board, the light board and the convex rack can realize the height adjustment of the fill light and the inclination angle adjustment of the reflector, so as to realize the adjustment of the fill light intensity;

[0019] 3. The online defect detection device of the die-cutting machine adopts a clamping mechanism to clamp the collected defective products. In conjunction with the marking mechanism, the defective products can be automatically marked, which is convenient for the subsequent identification of defective products. Specifically, after the defective products are collected, the second cylinder drives the collection box and the defective products to move upward. When the defective products contact the pressure plate, the elastic action of the first spring can achieve the clamping effect of the defective products. In conjunction with the action of the ejector rod, the counterweight block and the connecting rod, the slider, the vertical rod and the marker can be moved to draw lines and mark the defective products. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention from a frontal perspective;

[0021] Figure 2 It is a schematic diagram of the front view cross-section of the overall composition of the device of the present invention;

[0022] Figure 3 It is a bottom-up three-dimensional structural schematic diagram of the detection mechanism of the present invention;

[0023] Figure 4 It is a schematic diagram of the front view of the three-dimensional structure of the material receiving mechanism and the pressing mechanism of the present invention;

[0024] Figure 5 This is a schematic diagram of a front view of a three-dimensional structure in which a fixing plate and a pressing plate are separated according to the present invention;

[0025] Figure 6 It is a bottom-up three-dimensional structural schematic diagram of the clamping mechanism of the present invention;

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the marking mechanism of the present invention.

[0027] In the figure: 1, mounting frame; 101, motor; 102, conveyor roller; 103, conveyor belt; 2, product; 3, inspection box; 301, observation window; 302, control panel; 303, support plate; 4, inspection mechanism; 401, mounting plate; 402, industrial camera; 403, first cylinder; 404, light board; 405, fill light; 406, reflector; 407, first gear; 408, convex rack; 5, material receiving mechanism; 501, fixing plate; 502, The second cylinder; 503, the collecting box; 504, the shovel plate; 505, the roller; 506, the transmission gear; 507, the compound wheel; 6, the clamping mechanism; 601, the pressure plate; 602, the slide bar; 603, the first spring; 604, the pressure sensor; 605, the bracket; 7, the marking mechanism; 701, the cross bar; 702, the slide bar; 703, the connecting rod; 704, the counterweight block; 705, the push rod; 706, the vertical rod; 707, the second spring; 708, the marking pen. DETAILED DESCRIPTION

[0028] 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.

[0029] See also Figure 1-Figure 7 The present invention provides a technical solution: an online defect detection device for a die-cutting machine, comprising a mounting frame 1 and a detection box 3, the detection box 3 is fixed on the mounting frame 1, a detection mechanism 4 is fixed on the left side of the detection box 3, and a material receiving mechanism 5 is fixed on the right side of the detection box 3.

[0030] A motor 101 is fixed on the mounting frame 1, and a conveying roller 102 is fixed on the output end of the motor 101, and the bearing of the conveying roller 102 is connected to the mounting frame 1, and the conveying roller 102 is connected to the conveying belt 103; a transparent observation window 301 is installed on the front door of the detection box 3, and a control panel 302 is also installed on the front door of the detection box 3, and a support plate 303 is fixed in the detection box 3, and the support plate 303 is in contact with the conveying belt 103; the detection mechanism 4 includes a mounting plate 401, an industrial camera 402, a first cylinder 403, a light board 404, a fill light 405, a reflector 406, a first gear 407 and a convex rack 4 08, the mounting plate 401 is fixed on the left side of the detection box 3, and the industrial camera 402 is fixed on the lower end surface of the mounting plate 401, and the industrial camera 402 is connected to the control processing module; the first cylinder 403 is fixed symmetrically on the lower end surface of the mounting plate 401, and the light board 404 is fixed on the output end of the first cylinder 403, and the fill light 405 is evenly fixed on the lower end surface of the light board 404; the reflector 406 is connected to the bearing on the mounting plate 401, and the first gear 407 is symmetrically fixed on the reflector 406, and the first gear 407 is meshed with the convex rack 408, and the convex rack 408 is fixed on the lower end surface of the mounting plate 401;

[0031] When using the die-cutting machine online defect detection device, if Figure 1-Figure 7 As shown, the product 2 processed by the die-cutting machine is conveyed to the conveyor belt 103 through the transmission device. With the cooperation of the motor 101, the conveyor roller 102 and the conveyor belt 103, the product 2 moves from left to right. When the product 2 enters the detection box 3, the image information of the product 2 can be collected by the industrial camera 402, and the collected image information is transmitted to the control processing module. The collected image information is compared with the standard image information through the control processing module, so that the detection function of the product 2 can be realized. By judging whether the position deviation of the graphic information on the collected image information meets the standard, it is judged whether the product 2 is qualified. When the product 2 is detected, the fill light 405 can realize the fill light function to ensure the industrial The clarity of the image taken by the camera 402 is improved. When the light intensity of the fill light needs to be adjusted, the first cylinder 403 is extended to drive the light board 404 and the fill light 405 to move downward, reducing the distance between the fill light 405 and the product 2, thereby increasing the light intensity. When the light board 404 moves downward, the meshing transmission between the first gear 407 and the convex rack 408 is coordinated to reduce the angle between the two reflectors 406, thereby achieving a focusing effect and further increasing the fill light effect. According to the above principle, the distance between the fill light 405 and the product 2 is increased by contracting the first cylinder 403, and the angle between the two reflectors 406 is increased, thereby diverging the light and reducing the fill light effect, so as to better meet the fill light demand.

[0032] It includes a mounting frame 1 and a detection box 3, the mounting frame 1 is fixed with a detection box 3, a detection mechanism 4 is fixed on the left side of the detection box 3, a material receiving mechanism 5 is fixed on the right side of the detection box 3, the material receiving mechanism 5 includes a fixed plate 501, a second cylinder 502, a collection box 503, a shovel plate 504, a roller 505, a transmission gear 506 and a composite wheel 507, the fixed plate 501 is fixed in the detection box 3, a pressing mechanism 6 is installed on the fixed plate 501, the second cylinder 502 is symmetrically fixed on the fixed plate 501, the collection box 503 is fixed at the output end of the second cylinder 502, a shovel plate 504 is tiltedly fixed on the left side of the collection box 503, and the shovel plate 504 contacts and slides with the conveyor belt 103, the collection box 503 is also connected to a roller 505 with a bearing, the roller 505 is symmetrically fixed with a transmission gear 506, and the collection box 503 is also connected to a composite wheel with a bearing. 507, and the composite wheel 507 is composed of a gear and a roller, and the gear on the composite wheel 507 is meshed with the transmission gear 506 for transmission, and at the same time, the lower end surface of the roller on the composite wheel 507 is flush with the lower end surface of the shovel plate 504. In the process of inspecting product 2, when it is detected that product 2 is unqualified, the second cylinder 502 is extended to make the shovel plate 504 and the transmission gear 506 move downward, so that the shovel plate 504 and the roller on the composite wheel 507 are in contact with the conveyor belt 103. At this time, the product 2 moves to the shovel plate 504 under the action of the conveyor belt 103, and the transmission action of the gear on the composite wheel 507 and the transmission gear 506 makes the roller 505 roll, and the product 2 on the shovel plate 504 is transported to the collection box 503 for storage, and the defective products collected in the collection box 503 are compacted by the pressing mechanism 6, and then the defective products are marked by the marking mechanism 7;

[0033] After the product 2 test is completed, if Figure 1-Figure 7 As shown, when product 2 is a qualified product, the conveyor belt 103 conveys product 2 to the far right for subsequent processing. When product 2 is a defective product, the control processing module controls the second cylinder 502 to extend, thereby driving the collection box 503, the shovel plate 504, the roller 505, the transmission gear 506 and the composite wheel 507 to move downward until the shovel plate 504 and the roller on the composite wheel 507 contact the conveyor belt 103. At this time, under the operation of the conveyor belt 103, the defective product moves to the shovel plate 504. The composite wheel 507 is in contact with the roller 505, and when the conveyor belt 103 moves, the friction between the roller on the composite wheel 507 and the conveyor belt 103 makes the composite wheel 507 rotate, and the meshing transmission between the gear on the composite wheel 507 and the transmission gear 506 makes the roller 505 rotate clockwise, so that the defective products in contact with the roller 505 can be transported to the collection box 503 for collection, completing the automatic collection of defective products, ensuring the continuous operation of the device, and improving the detection efficiency;

[0034] The clamping mechanism 6 includes a pressing plate 601, a sliding rod 602, a first spring 603, a pressure sensor 604 and a bracket 605. The pressing plate 601 is arranged in the collection box 503, and the sliding rod 602 is fixed symmetrically on the pressing plate 601, and the sliding rod 602 is slidably connected to the fixed plate 501. At the same time, the first spring 603 is also fixed between the pressing plate 601 and the fixed plate 501. The marking mechanism 7 is installed on the pressing plate 601; a pressure sensor 604 is arranged just above the sliding rod 602, and the pressure sensor 604 is fixed on the bracket 605, and the bracket 605 is fixed on the fixed plate 501, and the pressure sensor 604 is connected to the control processing module; the marking mechanism 7 includes a cross bar 701, a slider 702, a connecting rod 703, a counterweight block 704, a push rod 705, a vertical rod 706, a second spring 707 and a marking pen 708, a cross bar 701 is fixed on the pressure plate 601, and a slider 702 is slidably connected to the cross bar 701, and the slider 702 is rotatably connected to one end of the connecting rod 703, and the other end of the connecting rod 703 is rotatably connected to the counterweight block 704, a push rod 705 is fixed to the lower end surface of the counterweight block 704, and the push rod 705 is slidably connected to the pressure plate 601; a vertical rod 706 is slidably connected to the slider 702, and a second spring 707 is fixed between the vertical rod 706 and the slider 702, and a marking pen 708 is fixed to the lower end of the vertical rod 706, and the lower end surface of the marking pen 708 is flush with the lower end surface of the push rod 705;

[0035] After the defective products are collected, Figure 1-Figure 7As shown, at this time, the pressing plate 601 and the collection box 503 are in a separated state, and the counterweight block 704 contacts the pressing plate 601 under the action of its own gravity, and the lower end surface of the push rod 705 is lower than the lower end surface of the pressing plate 601. When the second cylinder 502 contracts to make the collection box 503 and the collected defective products move upward, when the push rod 705 contacts the defective products, the lower end of the marking pen 708 contacts the defective products synchronously, and the second cylinder 502 continues to contract to make the push rod 705 and the marking pen 708 The relative pressure plate 601 moves upward under force. When the top rod 705 moves upward, the counterweight block 704 is synchronously driven to move upward, and the transmission effect of the connecting rod 703 is cooperated to make the slider 702 and the marker pen 708 slide horizontally. When the marker pen 708 moves upward under force, the sliding effect between the vertical rod 706 and the slider 702 can ensure the stability of the movement of the marker pen 708. At this time, the second spring 707 is forced to shrink. Through the elastic effect of the second spring 707, the marker pen 708 can move toward the defective product. A certain pressure is generated, and combined with the lateral sliding of the marker pen 708, a marking line can be drawn on the defective product, so that the subsequent staff can distinguish the defective products, and according to the above principle, the marking effect of each defective product can be achieved, and when the second cylinder 502 continues to contract to make the pressure plate 601 contact with the collected defective products, the defective products can be flattened until the second cylinder 502 contracts to the limit position. As the number of defective products increases, the thickness increases. When the second cylinder 502 contracts to the limit position, the pressure plate 601 will move upward relative to the collection box 503, and the sliding guiding effect between the slide bar 602 and the fixed plate 501 can ensure the stability of the movement of the pressure plate 601. When the second cylinder 502 contracts to the limit position, the slide bar 602 contacts the pressure sensor 604 to generate pressure. At this time, the pressure sensor 604 feeds back a signal to the control processing module to remind the staff to deal with the collected defective products in time. This is the working principle of the online defect detection device of the die-cutting machine.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An online defect detection device for a die-cutting machine, comprising a mounting frame (1) and a detection box (3), wherein the detection box (3) is fixed on the mounting frame (1), characterized in that: A detection mechanism (4) is fixed on the left side of the detection box (3), and a material receiving mechanism (5) is fixed on the right side of the detection box (3). The material receiving mechanism (5) comprises a fixed plate (501), a second cylinder (502), a collection box (503), a shovel plate (504), a roller (505), a transmission gear (506) and a composite wheel (507). The fixed plate (501) is fixed in the detection box (3), and a pressing mechanism (6) is installed on the fixed plate (501). A second cylinder (502) is fixed symmetrically on the front and rear sides of the cylinder (501), a collecting box (503) is fixed on the output end of the second cylinder (502), a shovel plate (504) is fixed obliquely on the left side of the collecting box (503), and the shovel plate (504) is in contact and slides with the conveyor belt (103), a roller (505) is also connected to the collecting box (503) with a bearing, a transmission gear (506) is fixed symmetrically on the front and rear sides of the roller (505), and a composite gear (506) is also connected to the collecting box (503) with a bearing. The composite wheel (507) is composed of a gear and a roller, and the gear on the composite wheel (507) is meshed with the transmission gear (506) for transmission, and the lower end surface of the roller on the composite wheel (507) is flush with the lower end surface of the shovel plate (504). During the process of inspecting the product (2), when it is detected that the product (2) is unqualified, the second cylinder (502) is extended to make the shovel plate (504) and the transmission gear (506) move downward, so that the shovel plate (504) and the composite wheel (507) are The upper roller contacts the conveyor belt (103), and the product (2) is moved onto the shovel plate (504) under the action of the conveyor belt (103). The gear on the composite wheel (507) and the transmission gear (506) are used to cause the roller (505) to roll, and the product (2) on the shovel plate (504) is transported to the collection box (503) for storage. The defective products collected in the collection box (503) are compacted by the compacting mechanism (6), and then the defective products are marked by the marking mechanism (7).

2. The die-cutting machine online defect detection device according to claim 1, characterized in that: A motor (101) is fixed on the mounting frame (1), a conveying roller (102) is fixed on the output end of the motor (101), and a bearing of the conveying roller (102) is connected to the mounting frame (1), while the conveying roller (102) and the transmission belt (103) are connected to each other.

3. The die-cutting machine online defect detection device according to claim 2, characterized in that: A transparent observation window (301) is installed on the front door of the detection box (3), and a control panel (302) is also installed on the front door of the detection box (3). A support plate (303) is fixed inside the detection box (3), and the support plate (303) is in contact with the conveyor belt (103).

4. The die-cutting machine online defect detection device according to claim 1, characterized in that: The detection mechanism (4) comprises a mounting plate (401), an industrial camera (402), a first cylinder (403), a light board (404), a fill light (405), a reflector (406), a first gear (407) and a convex rack (408); the mounting plate (401) is fixed on the left side of the detection box (3); the industrial camera (402) is fixed on the lower end surface of the mounting plate (401); and the industrial camera (402) is interconnected with a control processing module.

5. The die-cutting machine online defect detection device according to claim 4, characterized in that: The first cylinder (403) is symmetrically fixed to the front and rear of the lower end surface of the mounting plate (401), and a light board (404) is fixed to the output end of the first cylinder (403), and a fill light (405) is evenly fixed to the lower end surface of the light board (404).

6. The die-cutting machine online defect detection device according to claim 4, characterized in that: The mounting plate (401) is bearing-connected with a reflector (406), and a first gear (407) is symmetrically fixed to the reflector (406) in the front and rear directions, and the first gear (407) is meshed with a convex rack (408), and the convex rack (408) is fixed to the lower end surface of the mounting plate (401).

7. The die-cutting machine online defect detection device according to claim 1, characterized in that: The clamping mechanism (6) comprises a pressing plate (601), a sliding rod (602), a first spring (603), a pressure sensor (604) and a bracket (605); the pressing plate (601) is arranged in a collecting box (503), and the sliding rod (602) is symmetrically fixed on the pressing plate (601) in the front and rear directions, and the sliding rod (602) and the fixed plate (501) are slidably connected, and the first spring (603) is also fixed between the pressing plate (601) and the fixed plate (501); and a marking mechanism (7) is installed on the pressing plate (601).

8. The die-cutting machine online defect detection device according to claim 7, characterized in that: A pressure sensor (604) is arranged directly above the sliding rod (602), and the pressure sensor (604) is fixed on a bracket (605), and the bracket (605) is fixed on a fixed plate (501), and the pressure sensor (604) is interconnected with a control processing module.

9. The die-cutting machine online defect detection device according to claim 7, characterized in that: The marking mechanism (7) comprises a cross bar (701), a slider (702), a connecting rod (703), a counterweight (704), a push rod (705), a vertical rod (706), a second spring (707) and a marking pen (708); the cross bar (701) is fixed on the pressure plate (601), and the cross bar (701) is slidably connected with the slider (702), and the slider (702) is rotatably connected to one end of the connecting rod (703), and the other end of the connecting rod (703) is rotatably connected to the counterweight (704); the lower end surface of the counterweight (704) is fixed with a push rod (705), and the push rod (705) and the pressure plate (601) are slidably connected.

10. The die-cutting machine online defect detection device according to claim 9, characterized in that: The slider (702) is slidably connected with a vertical rod (706), a second spring (707) is fixed between the vertical rod (706) and the slider (702), and a marking pen (708) is fixed at the lower end of the vertical rod (706), and the lower end surface of the marking pen (708) is flush with the lower end surface of the top rod (705).

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