Label paper surface defect detection device and method

Abstract

The present invention belongs to the technical field of visual inspection, and specifically is a label paper surface defect inspection device and method, comprising an installation body, a winding roller and an unwinding roller, wherein a feeding trough is arranged on the upper side of the installation body, and the winding roller and the unwinding roller are rotatably arranged on both sides of the feeding trough respectively; a detection body is arranged in the middle part of the feeding trough, and a detection camera is arranged inside the detection body; the detection camera is used for visual inspection of new material paper tape passing through the detection body; the present invention starts up the detection cameras located on the upper and lower sides of the raw material paper tape and respectively takes images of the upper and lower surfaces of the raw material paper tape, and uses visual inspection intelligent software to automatically capture possible defects in the image, and automatically feeds back to the detection personnel after the defects are captured, so that the detection personnel can stop the machine, confirm and mark the defective paper tape part, and then process it to ensure the quality of the raw material paper tape for the final label paper processing.

Description

Technical Field

[0001] The invention belongs to the technical field of visual inspection, and in particular relates to a device and a method for inspecting surface defects of label paper. Background Art

[0002] During the label paper production process, an important factor affecting the quality of label paper is the quality of the selected production materials, such as the manufacturing of the paper tape material as the raw material. Therefore, in order to improve the quality of label paper and maintain the research and development progress, the formula of the paper tape material will be continuously improved and adjusted, and new materials will be continuously adopted for paper tape production; however, there is great uncertainty in the quality of the raw material paper tape using new materials. Therefore, before production, the raw material paper tape of label paper is tested to accurately identify the paper surface cleanliness, fiber texture, paper folding, wrinkles, holes and other defects that may exist on the raw material paper tape. Through production quality testing, it is verified whether the performance of the new material meets the actual application requirements, and more experimental data is provided for subsequent research and development adjustments, which is convenient for formulating specific application plans and research and development plans for new materials, thereby improving the quality of the final prepared label paper.

[0003] In the production and inspection process of raw material paper tapes, the surface defect quality inspection is generally carried out by collecting the surface image of the paper tape through an industrial camera, and using the trained defect vision capture intelligent software to timely and accurately identify the defects that may exist on the surface of the paper tape, so that the inspectors can find and mark them in time; however, in actual production, the inspectors found that during the production process, the surface of the raw material paper tape is adhered to paper scraps and dust due to static electricity. When passing through the detection position of the industrial camera, the raised paper scraps and dust may adhere to the lens surface of the industrial camera and adhere to the lens surface, affecting the shooting effect and thus affecting the accuracy of the inspection; at this time, it is necessary to interrupt the inspection process and notify the maintenance personnel to clean the lens part of the industrial camera, which greatly affects the inspection efficiency of the raw material paper tape, and thus affects the production efficiency of the label paper. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention proposes a device and method for detecting surface defects of label paper.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows: the present invention proposes a label paper surface defect detection device, comprising a mounting body, a winding roller and an unwinding roller, a feeding trough is arranged on the upper side of the mounting body, and the winding roller and the unwinding roller are rotatably arranged on both sides of the feeding trough respectively;

[0006] A detection body is arranged in the middle of the feeding chute, the feeding chute passes through the middle of the detection body, and a detection camera is arranged inside the detection body; the detection camera is used to perform visual detection on the raw material paper tape passing through the detection body;

[0007] The detection body is provided with detection slots at the top and bottom respectively, and the detection area is formed between the detection slots at the upper and lower sides. The raw paper tape to be detected passes through the middle of the detection area, and the detection cameras are provided inside the detection slots at the upper and lower sides; fill light sources are provided on the inner walls at both sides of the detection slots, and the fill light sources are controlled by an external controller;

[0008] A recovery chamber is arranged inside the detection slot, a recovery fan is arranged inside the recovery chamber, and the recovery chamber is communicated with the inside of the detection area; a protective cover is arranged on the inner wall of the detection slot, the protective cover is an arc-shaped structure, and the protective cover separates the detection camera and the detection area.

[0009] Preferably, arc grooves are provided on the inner walls on both sides of the detection groove, and the arc grooves are through groove structures and connect the recovery chamber and the detection groove; the two side ends of the protective cover pass through the corresponding arc grooves and extend to the interior of the recovery chamber; the inner surface of the protective cover facing the detection camera is connected to the inner wall of the arc groove.

[0010] Preferably, a cleaning protrusion is provided at a middle position of the outer surface of the protective cover facing the detection area, and the cleaning protrusion is hollow inside to form a cleaning channel, and the cleaning channel is communicated with a cleaning air source provided on the outer side;

[0011] Cleaning holes are evenly arranged on both sides of the cleaning protrusion, the openings of the cleaning holes point to the outer surface of the protective cover, and the cleaning holes are communicated with the inside of the cleaning channel.

[0012] Preferably, a cleaning rod is provided in the detection slot at a position located on the upper side of the protective cover, the cleaning rod is an arc-shaped rod structure, and the cleaning rod is in contact with the upper surface of the protective cover;

[0013] A slider is arranged on the upper side of the cleaning rod, and the slider is slidably embedded in a slide groove arranged on the inner wall of the arc groove to drive the cleaning rod to slide along the extending direction of the slide groove to clean the outer surface of the protective cover.

[0014] Preferably, a cleaning groove is provided on the surface of the cleaning rod facing the protective cover, and the two side ends of the cleaning groove extend into the recovery chamber; a scraper is provided on the inner wall of the cleaning groove, the scraper contacts the outer surface of the protective cover, and the scraper is made of elastic material.

[0015] Preferably, the interior of the cleaning rod is hollow to form a collecting channel, the collecting channel extends to both ends of the cleaning rod and communicates with the interior of the recovery chamber; an inflation device is provided in the middle of the collecting channel, and the inflation device communicates with the interior of the collecting channel;

[0016] A collecting hole is arranged at a position of the side wall of the collecting channel facing the cleaning tank. The collecting hole is communicated with the inside of the cleaning tank and is a conical hole structure.

[0017] Preferably, a partition is provided on the upper side of the collecting hole, the partition is arranged to be inclined upward, and the partition shields the upper area of ​​the collecting hole.

[0018] Preferably, the scraper is located on the inner wall of the cleaning trough at a position corresponding to the collecting hole, and guide grooves are evenly arranged on both side surfaces of the scraper, and the extension direction of the guide grooves is directly opposite to the bottom opening of the collecting hole on the upper side.

[0019] Preferably, the scraper blade is hollow inside to form a guide channel, the guide channel is communicated with the inflation device, and a flushing hole is provided on the side wall of the guide groove near the bottom of the scraper blade, and the flushing hole is communicated with the inside of the guide channel.

[0020] A method for detecting surface defects of label paper, the detection method using the above detection device, the detection method comprising the following steps:

[0021] S1: Prepare the label paper surface defect detection equipment, and wind the raw material paper tape to be tested onto the unwinding roller. When the detection starts, the motor connected to the unwinding roller starts, and the raw material paper tape is continuously released while rotating, so that it moves along the feeding trough and then passes through the detection body between the feeding troughs;

[0022] S2: In the detection machine, the raw material paper tape passes horizontally through the detection area between the upper and lower detection slots, and the detection cameras located on the upper and lower sides of the raw material paper tape are started to respectively capture images of the upper and lower surfaces of the raw material paper tape, and transmit the images to the analysis computer;

[0023] S3: The analysis computer uses the intelligent software of visual inspection to automatically capture the possible defects in the image, and automatically feeds back to the inspector after capturing the defects. The inspector can stop the machine, confirm and mark the defective paper tape part, and then process it to ensure the quality of the raw material paper tape for the final label paper processing.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. The present invention describes a label paper surface defect detection device and method. When the raw material paper tape crosses the detection area between the upper and lower detection slots, the detection cameras located on the upper and lower sides of the raw material paper tape are started to respectively capture images of the upper and lower surfaces of the raw material paper tape, and transmit the images to the analysis computer. By using visual detection intelligent software, possible defects in the image are automatically captured, and after the defects are captured, the image is automatically fed back to the detection personnel. The detection personnel can stop the machine, confirm and mark the defective paper tape part, and then process it to ensure the quality of the raw material paper tape for the final label paper processing.

[0026] 2. The label paper surface defect detection device and method described in the present invention will be blocked by the protective cover when dust and paper scraps approach the detection camera, thereby preventing direct contact between the paper scraps and the end of the detection camera; and the suction effect of the recovery fan makes the paper scraps and dust floating inside the detection area be sucked into the recovery chamber for collection, thereby ensuring the cleanliness of the inside of the detection area, reducing the adverse effects of paper scraps and dust on the clarity of the image taken by the detection camera, and improving the accuracy of the captured image, thereby improving the accuracy of the detection of the raw material paper tape. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Figure 1 is a stereogram of the detection device of the present invention;

[0029] Figure 2 is a partial cross-sectional view of the detection device of the present invention;

[0030] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0031] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle;

[0032] Figure 5 yes Figure 3 A partial enlarged view of point C in the middle;

[0033] Figure 6 It is a schematic diagram of the protective cover and the cleaning rod in the present invention;

[0034] Figure 7 is a cross-sectional schematic diagram of a cleaning rod in the present invention;

[0035] Figure 8 is a partial cross-sectional view of the cleaning rod of the present invention;

[0036] Fig. 9 It is a flow chart of the detection method in the present invention.

[0037] In the figure: installation body 1, winding roller 11, unwinding roller 12, feeding trough 13, detection body 2, detection camera 21, detection trough 22, fill light source 221, arc groove 222, slide trough 223, detection area 23, recovery chamber 24, recovery fan 241, protective cover 25, cleaning protrusion 251, cleaning channel 252, cleaning hole 253, cleaning rod 26, slider 261, cleaning trough 262, scraper 263, collection channel 264, inflation device 265, collection hole 266, partition 267, guide groove 268, guide channel 27, flushing hole 271. DETAILED DESCRIPTION

[0038] 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.

[0039] Embodiment 1:

[0040] As shown in the attached figure of the specification Figure 1-Figure 8 As shown, a label paper surface defect detection device comprises an installation body 1, a winding roller 11 and an unwinding roller 12, a loading slot 13 is arranged on the upper side of the installation body 1, and the winding roller 11 and the unwinding roller 12 are respectively rotatably arranged on both sides of the loading slot 13; a raw material paper tape to be tested is wound on the unwinding roller 12 and placed on the rotatably installed unwinding roller 12, and the end of the raw material paper tape using new material is connected to the winding roller 11, so that after the winding roller 11 and the unwinding roller 12 are driven by the connected motor to rotate, the raw material paper tape to be tested will continuously pass through the detection body 2 from the unwinding roller 12 and be collected on the winding roller 11;

[0041] A detection body 2 is disposed in the middle of the feeding chute 13, the feeding chute 13 passes through the middle of the detection body 2, and a detection camera 21 is disposed inside the detection body 2; the detection camera 21 is used to perform visual detection on the raw paper tape passing through the detection body 2;

[0042] The detection body 2 is provided with detection slots 22 near the top and bottom respectively. The detection slots 22 on the upper and lower sides are symmetrically arranged, and the area between them forms a detection area 23. The raw material paper tape to be tested passes through the middle position of the detection area 23. The detection slots 22 on the upper and lower sides are provided with detection cameras 21. The detection cameras 21 here are industrial cameras specially used for detecting the surface quality of paper tapes, and are connected to the analysis computer; the inner walls of the detection slots 22 are provided with fill light sources 221. The fill light sources 221 are controlled by an external controller, and the brightness of the fill light sources 221 can be adjusted to assist the detection camera 21 in performing the detection operation;

[0043] A recovery chamber 24 is arranged inside the detection slot 22, and a recovery fan 241 is arranged inside the recovery chamber 24. A filter is arranged between the air inlet end of the recovery fan 241 and the opening of the recovery chamber 24 to prevent the collected paper scraps, dust and other debris from affecting the normal operation of the recovery fan 241. The recovery chamber 24 is communicated with the interior of the detection area 23; a protective cover 25 is arranged on the inner wall of the detection slot 22, and the protective cover 25 is an arc-shaped structure and is made of transparent material. The protective cover 25 separates the detection camera 21 and the detection area 23.

[0044] Specific work flow: At the beginning of the inspection, the motor connected to the unwinding roller 12 is started, and the raw material paper tape is continuously released while rotating, so that it moves along the loading trough 13, and then passes through the inspection body 2 between the loading troughs 13; in this process, the raw material paper tape passes horizontally through the inspection area 23 located between the upper and lower inspection troughs 22, and the inspection cameras 21 located on the upper and lower sides of the raw material paper tape are started to respectively take images of the upper and lower surfaces of the raw material paper tape, and transmit the images to the analysis computer, and use the visual inspection intelligent software to automatically capture possible defects in the image, and automatically feedback to the inspection personnel after the defects are captured. The inspection personnel can stop the machine, confirm and mark the defective part of the paper tape, and then process it; through continuous actual production inspections, verify the quality of the raw material paper tape using new materials, and whether the performance of the raw material paper tape meets the actual application requirements, provide more experimental data for subsequent research and development adjustments, and facilitate the formulation of specific application plans and research and development plans for new materials, so as to develop label paper materials with better performance.

[0045] Furthermore, the dust and paper scraps brought up during the movement of the paper tape may drift into the detection area 23. When the dust and paper scraps approach the detection camera 21, they will be blocked by the protective cover 25 to prevent the direct contact between the dust and the end of the detection camera 21. The recovery fan 241 inside the recovery chamber 24 starts to exhaust air at a fixed time. The recovery chamber 24 is directly connected to the detection area 23. In this way, when the recovery fan 241 is started, the exhaust action causes the dust and paper scraps floating inside the detection area 23 to be sucked into the recovery chamber 24 for collection, thereby ensuring the cleanliness of the detection area 23. Moreover, under the exhaust action, the dust and paper scraps adhering to the outer surface of the protective cover 25 will also be accelerated to detach from the surface of the protective cover 25 under the exhaust action, and be sucked into the recovery chamber 24 for collection, thereby reducing the adverse effect of the image clarity captured by the detection camera 21 due to the dust and paper scraps, improving the accuracy of the captured image, and thus improving the accuracy of the detection of the raw material paper tape.

[0046] After the detection process is completed, the recovery chamber 24 can be opened to clean the paper scraps and dust collected inside, so as to ensure the smooth progress of the subsequent detection process; and through the automatic purification of the inside of the detection area 23, the frequency of manual cleaning of the detection camera 21 is also reduced, and the continuity of the detection process is improved, thereby improving the detection efficiency of the raw material paper tape and the production efficiency of the label paper.

[0047] Embodiment 2:

[0048] On the basis of Example 1, arc grooves 222 are provided on the inner walls on both sides of the detection groove 22. The arc grooves 222 are through grooves and connect the recovery chamber 24 and the detection groove 22; the ends on both sides of the protective cover 25 pass through the corresponding arc grooves 222 and extend to the inside of the recovery chamber 24; the inner surface of the protective cover 25 facing the detection camera 21 is connected to the inner wall of the arc groove 222; the outer surface of the protective cover 25 facing away from the detection camera 21 maintains a gap with the inner wall of the arc groove 222.

[0049] Specific working process: On the basis of the specific working process in Example 1, after the recovery fan 241 starts to start, the suction effect acts from the interconnected arc groove 222 to the detection groove 22, and the air flow inside the detection area 23 flows toward the inside of the arc groove 222. Because the protective cover 25 extends through the arc groove 222, the air inside the detection area 23 will contact the outer surface of the protective cover 25 when it flows toward the arc groove 222, and flow along the outer surface of the protective cover 25; in this process, the flowing airflow flushes the outer surface of the protective cover 25, so that the paper scraps, dust, etc. adhered to the outer surface of the protective cover 25 are accelerated to fall off, and slide along the flowing airflow and the outer surface of the protective cover 25, directly pass through the arc groove 222 and enter the recovery chamber 24 to be collected. In this way, while the inside of the detection area 23 is fully purified, the outer surface of the protective cover 25 is effectively cleaned, thereby ensuring that the internal detection camera 21 can clearly shoot and improve the accuracy of detection.

[0050] Embodiment three:

[0051] On the basis of the second embodiment, a cleaning protrusion 251 is provided on the outer surface of the protective cover 25 facing the detection area 23, and the cleaning protrusion 251 is located in the middle part of the protective cover 25, and the interior of the cleaning protrusion 251 is hollow to form a cleaning channel 252, and the cleaning channel 252 is communicated with a clean air source arranged on the outside; the clean air source here can be an external air pump or other air supply equipment, and is equipped with a purification component to deliver purified clean air; cleaning holes 253 are evenly provided on both sides of the cleaning protrusion 251, the cleaning holes 253 point to the two side surfaces of the protective cover 25, and the cleaning holes 253 are communicated with the inside of the cleaning channel 252.

[0052] Specific working process: On the basis of the specific working process in Example 2, the exhaust purification function of the recovery fan 241 makes the interior of the detection area 23 in a negative pressure state, in order to reduce the dust, paper scraps and other debris in the external environment brought in by the external air supplement, which affects the purification effect of the interior of the detection area 23; therefore, a clean air source is set, and after starting, a clean air flow is sent into the cleaning protrusion 251, and then the clean air flow flows out through the cleaning holes 253 evenly arranged on both sides of the cleaning protrusion 251 to supplement the air flow inside the detection area 23; while balancing the air pressure, the outflowing cleaning air flow flushes the outer surface of the protective cover 25, and flows into the arc groove 222 along the outer surface of the protective cover 25. In this process, the outer surface of the protective cover 25 is effectively cleaned, further ensuring the cleanliness of the outer surface of the protective cover 25 during the detection process, and improving the clarity of the image collected during the operation of the detection camera 21.

[0053] Embodiment 4:

[0054] On the basis of the third embodiment, a cleaning rod 26 is provided at the position of the detection groove 22 located on the upper side of the protective cover 25. The cleaning rod 26 is an arc-shaped rod structure, and the cleaning rod 26 contacts the upper surface of the protective cover 25; a slider 261 is provided on the upper side of the cleaning rod 26, and the slider 261 slides and is embedded in the slide groove 223 provided on the inner wall of the arc groove 222. The cooperation between the slider 261 and the slide groove 223 here uses the relevant technologies of the existing electric slider and electric slide rail. Under the action of the external controller, the slider 261 drives the cleaning rod 26 to slide along the extension direction of the slide groove 223 to clean the outer surface of the protective cover 25; a cleaning groove 262 is provided on the surface of the cleaning rod 26 facing the protective cover 25, and the two side ends of the cleaning groove 262 extend into the recovery chamber 24; a scraper 263 is provided on the inner wall of the cleaning groove 262, the scraper 263 contacts the outer surface of the protective cover 25, and the scraper 263 is made of elastic material.

[0055] Specific workflow: Based on the specific workflow in Example 3, when one roll of raw material paper tape is inspected and another roll of raw material paper tape is replaced, during this waiting interval, the cleaning rod 26 can be started to effectively clean the surface of the protective cover 25 to ensure the normal operation of the detection camera 21; specifically, in the initial state, the cleaning rod 26 is located on one side of the detection area 23 close to the edge of the side wall of the detection area 23, and does not affect the detection camera 21's shooting and detection of the raw material paper tape; when cleaning is required, the control slider 261 drives the cleaning rod 26 to slide along the slide groove 223, and the cleaning rod 26 scrapes off the paper scraps, dust and impurities adhered to the outer surface of the protective cover 25 during the sliding process, and releases the adhesion between it and the outer surface of the protective cover 25, so that it passes through the arc groove 222 under the action of airflow and enters the recovery chamber 24 for collection;

[0056] During the contact and sliding process between the cleaning rod 26 and the outer surface of the protective cover 25, it is mainly the scraper 263 on the inner wall of the cleaning groove 262 on the end of the cleaning rod 26 that contacts and scrapes the outer surface of the protective cover 25. Because the scraper 263 is made of elastic material, while cleaning the impurities adhering to the outer surface of the protective cover 25, the scraping wear on the outer surface of the protective cover 25 can be reduced, thereby ensuring that the image collected by the detection camera 21 during operation is clear enough; and the part of the cleaning rod 26 corresponding to the cleaning protrusion 251 on the surface of the protective cover 25 is first recessed upward, and when the cleaning rod 26 coincides with the position of the cleaning hole 253 on the cleaning protrusion 251 during the movement, the cleaning airflow flowing out of the cleaning hole 253 enters the interior of the cleaning groove 262 facing it, and then flows along the cleaning groove 262 toward the direction close to the arc groove 222, prompting the paper scraps and dust scraped off by the scraper 263 to scrape along the cleaning groove 262 directly through the arc groove 222 into the interior of the recovery chamber 24, reducing the situation where the paper scraps and impurities adhering to the scraper 263 affect its normal operation.

[0057] Embodiment five:

[0058] On the basis of the fourth embodiment, the inside of the cleaning rod 26 is hollow to form a collecting channel 264, which extends to the ends of both sides of the cleaning rod 26 and communicates with the inside of the recovery chamber 24; an inflatable device 265 is provided in the middle of the collecting channel 264, and the inflatable device 265 here adopts a micro air pump device, and the air outlet ends of the inflatable device 265 point to the collecting channels 264 on both sides respectively; a collecting hole 266 is provided at the side wall of the collecting channel 264 facing the cleaning groove 262, and the collecting hole 266 is communicated with the inside of the cleaning groove 262, and the collecting hole 266 is a conical hole structure, and the large end of the collecting hole 266 is located at the position where the inner wall of the cleaning groove 262 is located;

[0059] A partition 267 is arranged on the upper side of the collecting hole 266, and the partition 267 is arranged to be inclined upward, and the partition 267 covers the upper area of ​​the collecting hole 266; the scraper 263 is located on the inner wall of the cleaning groove 262 at a position corresponding to the collecting hole 266, that is, the installation position of the scraper 263 coincides with the position of the bottom opening of the collecting hole 266, and the thickness of the scraper 263 is smaller than the opening size of the collecting hole 266; the guide grooves 268 evenly arranged on the two side surfaces of the scraper 263 point to the bottom opening of the collecting hole 266 on the upper side.

[0060] Specific working process: Based on the specific working process in the fourth embodiment, during the sliding process of the cleaning rod 26, the air-filling device 265 located in the middle of the collecting channel 264 is started to inflate the collecting channels 264 on both sides, so that the airflow in the collecting channels 264 on both sides flows toward the arc-shaped grooves 222 on both sides respectively; this accelerates the air flow rate inside the collecting channel 264, and the air pressure is lower when the air flow rate is faster, so that the air in the cleaning groove 262 on the lower side is sucked into the collecting channel 264 through the collecting hole 266, and then flows along the collecting channel 264;

[0061] In this process, after the paper scraps and dust scraped off by the scraper blade 263 are separated from the surface of the protective cover 25, they are sucked into the collection channel 264 along with the flowing airflow, and then flow along the collection channel 264 toward the arc groove 222; in this way, the paper scraps and impurities adhering to the surface of the protective cover 25 can be separated from the surface of the protective cover 25 in time after being scraped off, which reduces the situation where the paper scraps and impurities adhere to the surface of the protective cover 25 during the sliding friction along the surface of the protective cover 25, so that the paper scraps and impurities separated from the surface of the protective cover 25 can smoothly enter the recovery chamber 24, ensuring the cleanliness of the surface of the protective cover 25;

[0062] Furthermore, as the collecting channel 264 exhausts air through the collecting hole 266 and the inside of the cleaning groove 262, the airflow outside the cleaning rod 26 flows in through the gap between the cleaning groove 262 and the surface of the protective cover 25, and then contacts the bottom of the scraper 263, and then flows upward along the guide grooves 268 arranged on the two side surfaces of the scraper 263; the concentrated airflow along the guide grooves 268 flushes the two side surfaces of the scraper 263, so that the paper scraps and impurities adhering to the end of the scraper 263 in contact with the surface of the protective cover 25 are accelerated to fall off, and flow upward with the airflow into the collecting channel 264, and are effectively recovered, thereby ensuring the normal operation of the scraper 263;

[0063] Furthermore, the inclined partition 267 is made of elastic material, and the connection between the partition 267 and the collecting channel 264 is located on the side of the collecting hole 266 close to the air outlet end of the inflation device 265, so that the airflow close to the partition 267 will flow along the upper surface of the partition 267, and be guided upward by the partition 267 to avoid directly impacting the opening of the collecting hole 266; in this way, paper scraps and impurities can flow smoothly with the incoming airflow through the gap between the end of the partition 267 and the inner wall of the collecting channel 264, and in the subsequent flow, the paper scraps and impurities in the flowing airflow will also be shielded by the partition 267, and smoothly pass through the opening of the collecting hole 266 behind, avoiding direct contact with the opening of the collecting hole 266 and flowing out and returning to the cleaning groove 262, thereby ensuring the smooth progress of the cleaning process.

[0064] Embodiment six:

[0065] On the basis of the fifth embodiment, the scraper blade 263 is hollow inside to form a guide channel 27, and the guide channel 27 is also connected to the air outlet end of the inflation device 265. A flushing hole 271 is provided on the side wall of the guide groove 268 near the bottom of the scraper blade 263. The flushing hole 271 is connected to the inside of the guide channel 27, and the opening of the flushing hole 271 is inclined upward.

[0066] Specific working process: On the basis of the specific working process in the fourth embodiment, when the inflation device 265 inflates the two sides of the collecting channel 264, a part of the airflow flows into the guide channel 27, so that the air pressure inside the guide channel 27 increases; because the scraper 263 is made of elastic material, it expands after inflation, and the expansion causes the scraper 263 to deform and vibrate, which accelerates the shedding of paper scraps and dust adhered to the surface of the scraper 263; and the end of the scraper 263 after being compressed and expanded is in closer contact with the surface of the protective cover 25, so that when the scraper 263 slides relative to the surface of the protective cover 25, the scraping effect on the surface of the protective cover 25 is enhanced, thereby improving the cleaning effect;

[0067] In addition, part of the airflow will flow out from the flushing hole 271 at the bottom and flow upward along the guide groove 268 to flush, so that the airflow intensity passing through the guide groove 268 on the surfaces of both sides of the scraper 263 is enhanced, thereby improving the flushing and cleaning effect of the scraper 263, and then improving the cleaning effect of the scraper 263 on the surface of the protective cover 25, ensuring the cleanliness of the surface of the protective cover 25, and promoting the normal operation of the internal detection camera 21, so as to efficiently detect the passing raw material paper tape.

[0068] Embodiment seven:

[0069] Based on the above embodiments, as shown in the accompanying drawings of the specification Fig. 9 As shown, a method for detecting surface defects of label paper is provided. The detection method uses the above detection device and comprises the following steps:

[0070] S1: Prepare the label paper surface defect detection equipment, and wind the raw material paper tape to be tested onto the unwinding roller 12. When the detection starts, the motor connected to the unwinding roller 12 is started, and the raw material paper tape is continuously released while rotating, so that it moves along the feeding trough 13 and then passes through the detection body 2 between the feeding troughs 13;

[0071] S2: In the detection body 2, the raw material paper tape passes horizontally through the detection area 23 located between the upper and lower detection slots 22, and the detection cameras 21 located on the upper and lower sides of the raw material paper tape are started to respectively capture images of the upper and lower surfaces of the raw material paper tape, and transmit the images to the analysis computer;

[0072] S3: The analysis computer uses the intelligent software of visual inspection to automatically capture the possible defects in the image, and automatically feeds back to the inspector after capturing the defects. The inspector can stop the machine, confirm and mark the defective paper tape part, and then process it to ensure the quality of the raw material paper tape for the final label paper processing.

[0073] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A label paper surface defect detection device, comprising a mounting body (1), a winding roller (11) and an unwinding roller (12), wherein a feeding trough (13) is arranged on the upper side of the mounting body (1), and the winding roller (11) and the unwinding roller (12) are rotatably arranged on both sides of the feeding trough (13); A detection body (2) is arranged in the middle of the feeding chute (13), the feeding chute (13) passes through the middle of the detection body (2), and a detection camera (21) is arranged inside the detection body (2); the detection camera (21) is used to perform visual detection on the raw material paper tape passing through the detection body (2); Features: The detection body (2) is provided with detection slots (22) at the top and bottom respectively, and the area between the detection slots (22) at the upper and lower sides forms a detection zone (23). The raw paper tape to be detected passes through the middle of the detection zone (23), and the detection cameras (21) are provided inside the detection slots (22) at the upper and lower sides; supplementary light sources (221) are provided on the inner walls of both sides of the detection slot (22), and the supplementary light sources (221) are controlled by an external controller; A recovery chamber (24) is provided inside the detection slot (22), a recovery fan (241) is provided inside the recovery chamber (24), and the recovery chamber (24) is communicated with the inside of the detection zone (23); a protective cover (25) is provided on the inner wall of the detection slot (22), the protective cover (25) is an arc-shaped structure, and the protective cover (25) separates the detection camera (21) and the detection zone (23); The inner walls on both sides of the detection slot (22) are provided with arc-shaped slots (222), the arc-shaped slots (222) are through-slot structures, and connect the recovery chamber (24) and the detection slot (22); the ends on both sides of the protective cover (25) pass through the corresponding arc-shaped slots (222) and extend into the interior of the recovery chamber (24); the inner side surface of the protective cover (25) facing the detection camera (21) is connected to the inner wall of the arc-shaped slot (222); A cleaning protrusion (251) is provided at a middle position of the outer surface of the protective cover (25) facing the detection area (23), and the cleaning protrusion (251) is hollow inside to form a cleaning channel (252), and the cleaning channel (252) is communicated with a cleaning air source provided on the outer side; Cleaning holes (253) are evenly arranged on both sides of the cleaning protrusion (251), the openings of the cleaning holes (253) are directed toward the outer surface of the protective cover (25), and the cleaning holes (253) are communicated with the interior of the cleaning channel (252).

2. The label paper surface defect detection device according to claim 1, characterized in that: A cleaning rod (26) is provided in the detection slot (22) at a position located on the upper side of the protective cover (25); the cleaning rod (26) is an arc-shaped rod structure, and the cleaning rod (26) is in contact with the upper surface of the protective cover (25); A slider (261) is provided on the upper side of the cleaning rod (26), and the slider (261) is slidably embedded in a slide groove (223) provided on the inner wall of the arc groove (222) to drive the cleaning rod (26) to slide along the extension direction of the slide groove (223) to clean the outer surface of the protective cover (25).

3. The label paper surface defect detection device according to claim 2, characterized in that: A cleaning groove (262) is provided on the surface of the cleaning rod (26) facing the protective cover (25), and the two side ends of the cleaning groove (262) extend into the interior of the recovery chamber (24); a scraper (263) is provided on the inner wall of the cleaning groove (262), the scraper (263) is in contact with the outer surface of the protective cover (25), and the scraper (263) is made of elastic material.

4. The label paper surface defect detection device according to claim 3, characterized in that: The interior of the cleaning rod (26) is hollow to form a collecting channel (264), the collecting channel (264) extends to both side ends of the cleaning rod (26) and communicates with the interior of the recovery chamber (24); an air-filling device (265) is provided in the middle of the collecting channel (264), the air-filling device (265) communicates with the interior of the collecting channel (264); A collecting hole (266) is provided at a position of the side wall of the collecting channel (264) facing the cleaning groove (262); the collecting hole (266) is communicated with the interior of the cleaning groove (262); and the collecting hole (266) is a tapered hole structure.

5. The label paper surface defect detection device according to claim 4, characterized in that: A partition plate (267) is arranged on the upper side of the collecting hole (266); the partition plate (267) is arranged to be inclined upward, and the partition plate (267) shields the upper area of ​​the collecting hole (266).

6. The label paper surface defect detection device according to claim 5, characterized in that: The scraper (263) is located on the inner wall of the cleaning groove (262) at a position corresponding to the collecting hole (266), and guide grooves (268) are evenly arranged on both side surfaces of the scraper (263), and the extension direction of the guide grooves (268) is directly opposite to the bottom opening of the collecting hole (266) on the upper side.

7. The label paper surface defect detection device according to claim 6, characterized in that: The scraper blade (263) is hollow inside to form a guide channel (27), and the guide channel (27) is communicated with the inflation device (265). A flushing hole (271) is provided on the side wall of the guide groove (268) near the bottom of the scraper blade (263), and the flushing hole (271) is communicated with the inside of the guide channel (27).

8. A method for detecting surface defects of label paper, the method using the detection device described in any one of claims 1 to 7, characterized in that: The detection method comprises the following steps: S1: Prepare the label paper surface defect detection equipment, and wind the raw material paper tape to be tested onto the unwinding roller (12). When the detection starts, the motor connected to the unwinding roller (12) is started, and the raw material paper tape is continuously released while rotating, so that it moves along the feeding trough (13) and then passes through the detection body (2) between the feeding troughs (13); S2: In the detection machine body (2), the raw material paper tape passes horizontally through the detection area (23) located between the upper and lower detection slots (22), and the detection cameras (21) located on the upper and lower sides of the raw material paper tape are activated to respectively capture images of the upper and lower surfaces of the raw material paper tape, and transmit the images to the analysis computer; S3: The analysis computer uses the visual inspection intelligent software to automatically capture the possible defects in the image. After the defects are captured, it automatically feeds back to the inspection personnel. The inspection personnel will stop the machine, confirm and mark the defective paper tape part, and then process it to ensure the quality of the raw material paper tape for the final label paper processing.

Images