Control method of plastic sheet manufacturing equipment, electronic equipment and storage medium

Abstract

The invention discloses a control method of plastic sheet manufacturing equipment, electronic equipment and a storage medium, and relates to the technical field of plastic production.The method comprises the steps that the first thickness of a plastic sheet output from a cooling device and the second thickness of the plastic sheet output from a first roll coating device are obtained; according to the first thickness, the second thickness and a preset first target coating thickness, the distance between the first adjusting roller and the first coating roller is adjusted through a preset thickness adjusting model; a first image, corresponding to the first side, of the plastic sheet output by the first roller coating device is obtained; performing image recognition processing on the first image to obtain a first roller coating defect type; and according to the first roller coating defect type, the coating parameters of the first adjusting roller are adjusted. The production cost can be reduced, the production efficiency is improved, and meanwhile the production quality of the plastic sheets is improved.

Description

Technical Field

[0001] The present application relates to the technical field of plastic production, and in particular to a control method, electronic equipment and storage medium for plastic sheet manufacturing equipment. Background Art

[0002] Today, plastic sheets play an important role in many fields. For example, in the food, daily chemical, pharmaceutical and daily necessities industries, most of their plastic products such as packaging boxes and fresh-keeping boxes rely on the blister process. With the continuous upgrading of the consumer market, consumers have higher and higher expectations for the appearance and function of packaging. Traditional single-layer plastic sheets are obviously unable to keep up with the pace of the times, and multi-layer composite sheets have become the mainstream development direction. By cleverly superimposing layers with specific functions such as black and white layers, moisture-proof layers, antistatic layers, and hydrophobic layers, it can fully meet the needs of diverse application scenarios.

[0003] The multi-layer co-extrusion manufacturing process, which is widely used at this stage, requires heating and mixing each layer of raw materials separately until they are extruded into a molten state, and then compounding and calendering each layer of molten raw materials into sheets according to a preset order. However, this traditional process, once a new functional layer is added to the plastic sheet or the existing functional material is changed, the existing control system often needs to be equipped with a corresponding extrusion device production line, as well as a multi-channel distributor and die head adapted thereto. The traditional production process undoubtedly increases production costs, and changing production lines is cumbersome and has low production efficiency. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a control method, electronic device and storage medium for plastic sheet manufacturing equipment, which can reduce production costs, improve production efficiency and improve the production quality of plastic sheets.

[0005] In a first aspect, the present application provides a control method for a plastic sheet manufacturing device, which is applied to the plastic sheet manufacturing device, wherein the plastic sheet manufacturing device comprises: an extruding device, a cooling device, a first rolling device, a drying device, and a winding device, wherein the extruding device is used to extrude a plastic sheet and sequentially pass through the cooling device, the first rolling device, the drying device, and the winding device, wherein the first rolling device is used to apply a coating to a first side of the plastic sheet, and comprises a first adjusting roller and a first coating roller;

[0006] The control method comprises:

[0007] Acquire a first thickness of the plastic sheet output from the cooling device and a second thickness of the plastic sheet output from the first roller coating device;

[0008] According to the first thickness, the second thickness and a preset first target coating thickness, adjusting the distance between the first regulating roller and the first coating roller by a preset thickness adjustment model;

[0009] Acquire a first image of the plastic sheet output from the first roller coating device corresponding to the first side;

[0010] Performing image recognition processing on the first image to obtain a first coating defect type;

[0011] According to the first rolling coating defect type, the coating parameters of the first regulating roller are adjusted.

[0012] According to the control method of the plastic sheet manufacturing equipment of the first embodiment of the present application, there are at least the following beneficial effects: the first roller coating device introduced in the control method can add a functional layer to the sheet by roller coating, avoiding the need to frequently add hardware equipment such as an extruder. In the control method, the first thickness of the plastic sheet output from the cooling device and the second thickness of the plastic sheet output from the first roller coating device are obtained by using corresponding detection equipment, and then the first thickness and second thickness information obtained are combined with the preset first target coating thickness, and are input into the preset thickness adjustment model together. After calculation and analysis, the corresponding adjustment instruction is output to accurately adjust the spacing between the first adjustment roller and the first coating roller, so that the expected thickness can be uniformly attached to the plastic sheet in this way, and accurate coating is achieved. At the same time, the first image of the plastic sheet output from the first roller coating device corresponding to the first side is obtained, and then the image is analyzed by image recognition processing technology to identify the type of roller coating defects therein, and the coating parameters of the first adjustment roller are adjusted in a targeted manner according to the first roller coating defect type obtained above. By precisely controlling the various parameters of the roller coating process, the coating can be evenly and stably attached to the plastic sheet, thus effectively avoiding roller coating defects and improving the quality of the final plastic sheet product. When the production line is dealing with the production of plastic sheets with different numbers of layers and different functional requirements, the flexible regulation of the roller coating device by this control method can be more conveniently switched and adjusted, without the need for the fixed configuration and complex transformation of the traditional extruder production line, which reduces production costs, improves production efficiency, and improves the production quality of plastic sheets through multi-faceted monitoring.

[0013] According to some embodiments of the first aspect of the present application, adjusting the distance between the first adjustment roller and the first coating roller by a preset thickness adjustment model according to the first thickness, the second thickness and a preset first target coating thickness includes:

[0014] determining an actual coating thickness according to the first thickness and the second thickness;

[0015] Obtaining a thickness difference according to the actual coating thickness and the first target coating thickness;

[0016] Obtaining a spacing adjustment value according to the thickness difference and a preset thickness adjustment model;

[0017] The first adjusting roller is adjusted according to the spacing adjustment value to change the spacing between the first adjusting roller and the first coating roller.

[0018] According to some embodiments of the first aspect of the present application, the thickness adjustment model is trained by the following steps:

[0019] Acquire a plurality of historical distance change values ​​between the first regulating roller and the first coating roller, and a historical thickness change value corresponding to each of the historical distance change values;

[0020] Obtaining a conversion coefficient according to the historical spacing change value and the corresponding historical thickness change value;

[0021] The thickness adjustment model is established according to the conversion coefficient.

[0022] According to some embodiments of the first aspect of the present application, before the step of adjusting the first adjusting roller according to the spacing adjustment value to change the spacing between the first adjusting roller and the first coating roller, the method further includes:

[0023] Acquire a current distance value between the first regulating roller and the first coating roller;

[0024] Obtaining an estimated spacing value according to the current spacing value and the spacing adjustment value;

[0025] When the estimated spacing value is less than a preset spacing threshold, the first adjustment roller is not adjusted, and a first warning signal is generated; wherein the first warning signal is used to prompt that the first coating roller needs to be replaced.

[0026] According to some embodiments of the first aspect of the present application, performing image recognition processing on the first image to obtain a first coating defect type includes:

[0027] Performing grayscale processing on the first image to obtain a grayscale image;

[0028] Performing noise reduction and enhancement processing on the grayscale image to obtain a target image;

[0029] Identify the target image, determine the high brightness area, and extract edge contour information of the high brightness area;

[0030] Analyzing the edge profile information to obtain circularity;

[0031] When the circularity is greater than or equal to a preset circularity threshold, it is determined that a first defect type exists; wherein the first defect type is used to characterize the presence of bubbles on the coating surface of the plastic sheet by the first coating device;

[0032] According to the target image, a grayscale change rate is calculated;

[0033] When the grayscale change rate is greater than or equal to a preset change threshold, it is determined that a second defect type exists; wherein the second defect type is used to characterize that the first coating device has uneven coating thickness on the coating surface of the plastic sheet.

[0034] According to some embodiments of the first aspect of the present application, the first rolling coating device further includes a scraper structure; and adjusting the coating parameters of the first adjusting roller according to the first rolling coating defect type includes:

[0035] When a first defect type exists, reducing the rotation speed of the first coating roller by a preset first rotation speed adjustment value;

[0036] When the second defect type exists, the plastic sheet making equipment is stopped, and the scraper structure is controlled to scrape off the residual paint on the outer surface of the first paint roller until the outer surface of the first paint roller is restored to be flat, and then the plastic sheet making equipment is restarted.

[0037] According to some embodiments of the first aspect of the present application, the plastic sheet manufacturing equipment further includes a second rolling device, the second rolling device is arranged between the drying device and the winding device, the second rolling device includes a steering structure, a second adjustment roller and a second coating roller, the second rolling device is used to apply coating to the second side of the plastic sheet, and the steering structure is used to flip the orientation of the plastic sheet;

[0038] The plastic sheet extruded by the extruding device passes through the cooling device, the first roller coating device, the drying device and the second roller coating device once, and then passes through the drying device and the winding device in sequence through the turning roller;

[0039] The control method further comprises:

[0040] Obtaining a third thickness of the plastic sheet outputted from the drying device for the first time, and a fourth thickness of the plastic sheet outputted from the second roller coating device;

[0041] According to the third thickness, the fourth thickness and a preset second target coating thickness, adjusting the distance between the second regulating roller and the second coating roller by the thickness adjustment model;

[0042] Acquire a second image of the plastic sheet output from the second roller coating device corresponding to the second side;

[0043] Performing image recognition processing on the second image to obtain a second coating defect type;

[0044] According to the second rolling coating defect type, the coating parameters of the second regulating roller are adjusted.

[0045] According to some embodiments of the first aspect of the present application, the extrusion device includes a first extrusion structure, a second extrusion structure, a layered structure and an extrusion die, the first extrusion structure is used to extrude a first fluid, the second extrusion structure is used to extrude a second fluid, the layered structure includes a first channel and a second channel, the feed end of the first channel is connected to the discharge end of the first extrusion structure, the feed end of the second channel is connected to the discharge end of the second extrusion structure, two second channels are provided and are respectively located on both sides of the first channel, the discharge ends of the first channel and the second channel are connected to the feed end of the extrusion die, and the discharge end of the extrusion die is used to extrude a plastic sheet;

[0046] The control method further comprises:

[0047] Obtaining a first flow rate at a feed end of the first channel and a second flow rate at a feed end of the second channel;

[0048] According to the ratio of the first flow rate to the second flow rate and a preset raw material ratio value, adjusting the output of the first extrusion structure and the second extrusion structure;

[0049] Obtaining the real-time temperature of the extrusion die;

[0050] The heating power of the extrusion die is adjusted according to the real-time temperature and the preset standard temperature.

[0051] In a second aspect, the present application further provides an electronic device, including:

[0052] at least one memory;

[0053] at least one processor;

[0054] at least one program;

[0055] The programs are stored in the memory, and the processor executes at least one of the programs to implement the control method of the plastic sheet manufacturing equipment as described in any one of the embodiments of the first aspect.

[0056] In a third aspect, the present application further provides a computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer-executable signal, and the computer-executable signal is used to execute the control method of the plastic sheet production equipment as described in any embodiment of the first aspect.

[0057] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0059] Figure 1 A flow chart of a control method for a plastic sheet manufacturing device provided in some embodiments of the present application;

[0060] Figure 2 A schematic diagram of the structure of a plastic sheet manufacturing device provided in some embodiments of the present application;

[0061] Figure 3 A schematic structural diagram of a first roller coating device provided in some embodiments of the present application;

[0062] Figure 4 A schematic structural diagram of a second roller coating device provided in some embodiments of the present application.

[0063] The figures are as follows:

[0064] Extrusion device 100; first extrusion structure 110; second extrusion structure 120; layering mechanism 130; extrusion die 140; cooling device 200; first roller coating device 300; first adjustment roller 310; first coating roller 320; drying device 400; winding device 500; second roller coating device 600; steering structure 610; second adjustment roller 620; second coating roller 630. DETAILED DESCRIPTION

[0065] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0066] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0067] In the description of this application, if there is a description of first or second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0068] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0069] Today, plastic sheets play an important role in many fields. For example, in the food, daily chemical, pharmaceutical and daily necessities industries, most of their plastic products such as packaging boxes and fresh-keeping boxes rely on the blister process. With the continuous upgrading of the consumer market, consumers have higher and higher expectations for the appearance and function of packaging. Traditional single-layer plastic sheets are obviously unable to keep up with the pace of the times, and multi-layer composite sheets have become the mainstream development direction. By cleverly superimposing layers with specific functions such as black and white layers, moisture-proof layers, antistatic layers, and hydrophobic layers, it can fully meet the needs of diverse application scenarios.

[0070] The multi-layer co-extrusion manufacturing process, which is widely used at this stage, requires heating and mixing each layer of raw materials separately until they are extruded into a molten state, and then compounding and calendering each layer of molten raw materials into sheets according to a preset order. However, this traditional process, once a new functional layer is added to the plastic sheet or the existing functional material is changed, the existing control system often needs to be equipped with a corresponding extrusion device production line, as well as a multi-channel distributor and die head adapted thereto. The traditional production process undoubtedly increases production costs, and changing production lines is cumbersome and has low production efficiency.

[0071] Based on this, the present application provides a control method, electronic device and storage medium for a plastic sheet manufacturing device to solve the above-mentioned technical problems. The technical solutions provided by the present application are described in detail one by one below.

[0072] In a first aspect, the present application provides a control method for a plastic sheet manufacturing device, which is applied to the plastic sheet manufacturing device, wherein the plastic sheet manufacturing device comprises: an extruding device, a cooling device, a first rolling device, a drying device, and a winding device, wherein the extruding device is used to extrude the plastic sheet and sequentially pass through the cooling device, the first rolling device, the drying device, and the winding device, wherein the first rolling device is used to apply a coating to the first side of the plastic sheet, and comprises a first adjusting roller and a first coating roller. The control method for the plastic sheet manufacturing device may include but is not limited to the following steps:

[0073] Step S110: obtaining a first thickness of the plastic sheet output from the cooling device and a second thickness of the plastic sheet output from the first roller coating device;

[0074] Step S120: adjusting the distance between the first regulating roller and the first coating roller by a preset thickness adjustment model according to the first thickness, the second thickness and the preset first target coating thickness;

[0075] Step S130: acquiring a first image corresponding to a first side of the plastic sheet output from the first roller coating device;

[0076] Step S140: performing image recognition processing on the first image to obtain a first coating defect type;

[0077] Step S150: adjusting the coating parameters of the first adjustment roller according to the first coating defect type.

[0078] In step S110 to step S150, the first roller coating device introduced in the control method can add a functional layer to the sheet by roller coating, avoiding the need to frequently add hardware equipment such as an extruder. In the control method, the first thickness of the plastic sheet output from the cooling device and the second thickness of the plastic sheet output from the first roller coating device are obtained by using corresponding detection equipment. Subsequently, the first thickness and second thickness information obtained are combined with the preset first target coating thickness and input into the preset thickness adjustment model. After calculation and analysis, the corresponding adjustment instruction is output to accurately adjust the spacing between the first adjustment roller and the first coating roller. In this way, the plastic sheet can be attached to the desired thickness uniformly and accurately coated. At the same time, the first image of the plastic sheet output from the first roller coating device corresponding to the first side is obtained. Subsequently, the image is analyzed by image recognition processing technology to identify the type of roller coating defects therein. According to the first roller coating defect type obtained above, the coating parameters of the first adjustment roller are adjusted in a targeted manner. By precisely controlling the various parameters of the roller coating process, the coating can be evenly and stably attached to the plastic sheet, thus effectively avoiding roller coating defects and improving the quality of the final plastic sheet product. When the production line is dealing with the production of plastic sheets with different numbers of layers and different functional requirements, the flexible regulation of the roller coating device by this control method can be more conveniently switched and adjusted, without the need for the fixed configuration and complex transformation of the traditional extruder production line, which reduces production costs, improves production efficiency, and improves the production quality of plastic sheets through multi-faceted monitoring.

[0079] It is understood that step S120 may include but is not limited to the following steps:

[0080] Step S210: determining the actual coating thickness according to the first thickness and the second thickness;

[0081] Step S220: obtaining a thickness difference according to the actual coating thickness and the first target coating thickness;

[0082] Step S230: obtaining a spacing adjustment value according to the thickness difference and a preset thickness adjustment model;

[0083] Step S240: adjusting the first adjusting roller according to the spacing adjustment value to change the spacing between the first adjusting roller and the first coating roller.

[0084] In step S210 to step S240, the first thickness of the plastic sheet output from the cooling device and the second thickness of the plastic sheet output from the first roller coating device are obtained, and then the first thickness is subtracted from the second thickness, and the obtained value is the actual coating thickness. The obtained actual coating thickness is compared with the preset first target coating thickness, and the actual coating thickness is subtracted from the first target coating thickness to obtain the thickness difference. The thickness difference reflects the degree of deviation between the current roller coating thickness and the ideal thickness. If the difference is positive, it means that the actual coating thickness is less than the target thickness; if the difference is negative, it means that the actual coating thickness is greater than the target thickness. The calculated thickness difference is input into the preset thickness adjustment model, which describes the relationship between the spacing change between the adjustment roller and the coating roller and the coating thickness change. According to the input thickness difference, the model outputs a corresponding spacing adjustment value through internal algorithms and parameter calculations, and according to the obtained spacing adjustment value, the control system drives the motor and other actuators to adjust the position of the first adjustment roller. Through the above steps, the coating thickness can be accurately adjusted to the target value according to the specific requirements of the product, such as different functional coatings require different precise thicknesses to achieve optimal performance, thereby ensuring the stability and consistency of product quality and reducing product failures due to coating thickness not meeting requirements.

[0085] It is understandable that the thickness adjustment model mentioned above can be trained through the following steps:

[0086] Step S310: acquiring a plurality of historical distance change values ​​between the first regulating roller and the first coating roller, and a historical thickness change value corresponding to each historical distance change value;

[0087] Step S320: Obtaining a conversion coefficient according to the historical spacing change value and the corresponding historical thickness change value;

[0088] Step S330: establishing a thickness adjustment model according to the conversion coefficient.

[0089] In step S310 to step S330, during the production process of the plastic sheet, a plurality of historical spacing change values ​​between the first regulating roller and the first coating roller are recorded, and a historical thickness change value corresponding to each historical spacing change value is recorded. For each set of historical spacing change values ​​and corresponding historical thickness change values, the relationship between them is determined by mathematical calculation. By performing such calculations on a large amount of historical data, a series of conversion coefficients can be obtained. After obtaining a plurality of conversion coefficients, a thickness adjustment model is established based on these coefficients, such as establishing a linear function or a nonlinear function, which is not limited in the present application. When it is necessary to calculate the spacing adjustment value based on the thickness difference, the thickness difference can be substituted into this model, and the corresponding spacing adjustment value can be obtained by solving, thereby realizing accurate adjustment of the roller spacing. By collecting a large amount of historical spacing change values ​​and corresponding historical thickness change values ​​to construct a model, various situations in the actual production process are fully considered. This modeling method based on actual production data can more accurately reflect the true relationship between roller spacing and coating thickness, avoid the problem of disconnection between theoretical model and actual production, and thus improve the accuracy of thickness adjustment model.

[0090] It is understandable that before step S240, the following steps may also be included but not limited to:

[0091] Step S410: obtaining a current distance value between the first regulating roller and the first coating roller;

[0092] Step S420: Obtaining an estimated spacing value according to the current spacing value and the spacing adjustment value;

[0093] Step S430: When the estimated spacing value is less than the preset spacing threshold, the first adjustment roller is not adjusted, and a first warning signal is generated; wherein the first warning signal is used to prompt that the first coating roller needs to be replaced.

[0094] In step S410 to step S430, the current spacing value between the first adjustment roller and the first coating roller is measured and obtained in real time, the current spacing value obtained is calculated with the spacing adjustment value to be implemented, and the calculated estimated spacing value is compared with the preset spacing threshold. This preset spacing threshold is a critical value determined based on the design parameters of the equipment, the characteristics of the coating and past production experience, and is stored in the database of the equipment control system. When it is found that the estimated spacing value is less than the preset spacing threshold, it means that adjusting the roller spacing according to the original plan may cause the rollers to be too close, and there is a risk of damaging the rollers, affecting the uniformity of coating, and even causing production accidents. At this time, the control system will immediately stop the adjustment action of the first adjustment roller and generate a first warning signal at the same time. The warning signal will notify the operator that the first coating roller needs to be replaced through an audible and visual alarm device (such as flashing warning lights, buzzers beeping) and pop-up prompt information on the operation interface to ensure production safety and product quality.

[0095] It is understandable that step S140 may include but is not limited to the following steps:

[0096] Step S510: grayscale the first image to obtain a grayscale image;

[0097] Step S520: performing noise reduction and enhancement processing on the grayscale image to obtain a target image;

[0098] Step S530: identifying a high brightness area from the target image, and extracting edge contour information of the high brightness area;

[0099] Step S540: analyzing edge profile information to obtain circularity;

[0100] Step S550: when the circularity is greater than or equal to a preset circularity threshold, it is determined that a first defect type exists; wherein the first defect type is used to indicate that bubbles exist on the coating surface of the plastic sheet by the first coating device;

[0101] Step S560: Calculate the grayscale change rate according to the target image;

[0102] Step S570: When the grayscale change rate is greater than or equal to a preset change threshold, it is determined that a second defect type exists; wherein the second defect type is used to characterize that the first coating device has uneven coating thickness on the coating surface of the plastic sheet.

[0103] In step S510, after the first image of the plastic sheet corresponding to the first side outputted from the first roller coating device is obtained by using an image acquisition device, it is first converted into a grayscale image. Compared with a color image, a grayscale image has a smaller data volume, a faster processing speed, and can retain the basic contour and texture information of the image, which is convenient for subsequent analysis. Through a specific grayscale algorithm, such as a weighted average method, the values ​​of the red, green, and blue channels in the color image are added according to a certain weight to obtain the corresponding grayscale value, thereby generating a grayscale image.

[0104] In step S520, the obtained grayscale image is subjected to noise reduction processing to remove noise points introduced by factors such as illumination and device electronic noise during the image acquisition process. Common noise reduction methods include median filtering, which replaces the value of a pixel point in the image by selecting the median value of the pixel value in the neighborhood around the pixel point in the image, thereby smoothing the image and eliminating isolated noise points. Then, image enhancement processing is performed to highlight the useful information in the image, such as using the histogram equalization method to stretch the grayscale distribution of the image, so that the contrast of the image is improved, making the originally blurred details clearer, and finally obtaining the target image.

[0105] In step S530 to step S550, in the target image, since bubbles usually appear as high-brightness areas on the image, the high-brightness areas are identified by setting a suitable brightness threshold and using a threshold segmentation algorithm. Then, the edge detection algorithm is used to extract the edge contour information of these high-brightness areas, and by calculating the gradient strength and direction of the pixels in the image, the pixels whose gradient strength exceeds a certain threshold are found as edge points, and then these edge points are connected to form edge contours. For the extracted edge contour information, its circularity is calculated. The calculation formula for circularity is usually based on the perimeter and area of ​​the area surrounded by the contour, for example, circularity = 4π×(area / perimeter)2, and the calculated circularity is compared with the preset circular threshold. When the circularity is greater than or equal to the preset circular threshold, according to the pre-set rules, it is judged that the first defect type exists, that is, there are bubbles on the roller coating surface.

[0106] In step S560 to step S570, first, the target image is divided into several small areas (such as rectangular areas), and then the ratio of the standard deviation of the gray value in each area to the mean is calculated as the gray change rate of the area. Then, the gray change rate of all areas is statistically analyzed, and when it is found that the gray change rate is greater than or equal to the preset change threshold, it is determined that the second defect type exists, that is, uneven roller coating thickness.

[0107] Through the image recognition processing steps, the defect types of bubbles and uneven coating thickness that occur during the coating process can be accurately identified, defects that occur during the production process can be quickly checked, and they can be quickly located and adjusted in an adaptive manner.

[0108] It is understandable that the first roller coating device also includes a scraper structure. In step S150, the following steps may be included but not limited to:

[0109] Step S510: when a first defect type exists, reducing the rotation speed of the first coating roller by a preset first rotation speed adjustment value;

[0110] Step S520: When the second defect type exists, the plastic sheet making equipment is stopped, and the scraper structure is controlled to scrape off the residual paint on the outer surface of the first paint roller until the outer surface of the first paint roller is restored to be flat, and the plastic sheet making equipment is restarted.

[0111] In step S510, when the image recognition system determines that there is a first defect type, that is, bubbles exist on the roller coating surface, the system will call the preset first speed adjustment value from the preset parameter library. This value is determined based on past experience, paint characteristics and equipment operating parameters, and is intended to effectively eliminate the bubble problem. Then, the control system sends an instruction to the motor that drives the first paint roller to rotate, and reduces the rotation speed of the first paint roller according to the preset first speed adjustment value. After the speed is reduced, the paint will be more evenly distributed on the roller surface, reducing the possibility of bubbles formed by the air drawn in due to the rapid rolling of the paint, thereby improving the rolling effect.

[0112] In step S520, once the second defect type, that is, uneven roller coating thickness, is identified, the system sends a shutdown command to the master control system of the plastic sheet material production equipment to stop the entire equipment from working, ensuring that defective products will not continue to be produced and avoiding material waste. Then, the control system activates the scraper structure, and the drive device drives the scraper to move along the axial direction of the first paint roller to scrape off the residual paint on the outer surface of the roller. During the scraping process, the outer surface state of the first paint roller is monitored in real time until it is confirmed that its outer surface has returned to flatness. When the outer surface of the roller is flat, the control system sends a start command to the equipment master control system again to restart the plastic sheet material production equipment and resume normal production process. At this time, since the paint state on the roller surface has been adjusted, it is expected to solve the problem of uneven roller coating thickness and produce qualified products.

[0113] It is understandable that the plastic sheet manufacturing equipment further includes a second coating device, which is arranged between the drying device and the winding device, and includes a steering structure, a second adjusting roller and a second coating roller. The second coating device is used to apply coating to the second side of the plastic sheet, and the steering structure is used to flip the orientation of the plastic sheet. Specifically, if it is not only necessary to add a layer of material to the first side of the plastic sheet, but also to add a layer of material to the second side of the plastic sheet, then a second coating device is added to apply coating to the second side of the plastic sheet. This double-sided coating arrangement enables the plastic sheet to be coated with coatings of different functions on both sides. For example, one side can be coated with a moisture-proof layer, and the other side can be coated with an antistatic layer, or one side is a decorative coating and the other side is a functional coating. In this way, plastic sheets with multiple functional combinations can be flexibly produced according to different market demands and product uses, thereby enhancing the diversity and market competitiveness of products. The process design in which the plastic sheet passes through the cooling device, the first coating device, the drying device and the second coating device once, and then passes through the drying device and the winding device in sequence through the steering roller makes the entire production process more compact and continuous. The turnover and waiting time in the intermediate links are reduced, while ensuring the quality of double-sided coating, the production efficiency is improved, and the production of products can be completed faster.

[0114] Specifically, the roller coating control method for the second side may include but is not limited to the following steps:

[0115] Step S710: obtaining a third thickness of the plastic sheet outputted from the drying device for the first time, and a fourth thickness of the plastic sheet outputted from the second roller coating device;

[0116] Step S720: adjusting the distance between the second regulating roller and the second coating roller through the thickness adjustment model according to the third thickness, the fourth thickness and the preset second target coating thickness;

[0117] Step S730: acquiring a second image corresponding to the second side of the plastic sheet output from the second roller coating device;

[0118] Step S740: performing image recognition processing on the second image to obtain a second coating defect type;

[0119] Step S750: adjusting the coating parameters of the second adjustment roller according to the second coating defect type.

[0120] The execution steps and beneficial effects of the above-mentioned steps S710 to S750 are similar to those of steps S110 to S150, and no further description will be given here. For details, reference may be made to the relevant embodiments of steps S110 to S150. Since the second roller coating device also adopts a thickness and image monitoring control method similar to that of the first roller coating device, once a quality problem occurs in the second side roller coating, it can be discovered and adjusted in time during the production process. This avoids rework or scrapping caused by discovering quality problems during subsequent processing or use, further improving the effective output rate of production and reducing production costs.

[0121] It can be understood that the extrusion device includes a first extrusion structure, a second extrusion structure, a layered structure and an extrusion die, the first extrusion structure is used to extrude a first fluid, the second extrusion structure is used to extrude a second fluid, the layered structure includes a first channel and a second channel, the feed end of the first channel is connected to the discharge end of the first extrusion structure, the feed end of the second channel is connected to the discharge end of the second extrusion structure, the second channel is provided with two and is located on both sides of the first channel, the discharge ends of the first channel and the second channel are connected to the feed end of the extrusion die, and the discharge end of the extrusion die is used to extrude plastic sheets. Correspondingly, the control method of the plastic sheet manufacturing equipment may also include but is not limited to the following steps:

[0122] Step S810: acquiring a first flow rate at a feed end of a first channel and a second flow rate at a feed end of a second channel;

[0123] Step S820: adjusting the output of the first extrusion structure and the second extrusion structure according to the ratio of the first flow rate to the second flow rate and a preset raw material ratio value;

[0124] Step S830: obtaining the real-time temperature of the extrusion die;

[0125] Step S840: adjusting the heating power of the extrusion die according to the real-time temperature and the preset standard temperature.

[0126] The first channel in the mixed structure is surrounded by the second channels on both sides. This unique layout provides good conditions for the stratification of raw materials. When the first fluid extruded by the first extrusion structure passes through the first channel and the second fluid extruded by the second extrusion structure passes through the second channels on both sides, the three fluids can maintain a relatively independent flow state during the flow to the extrusion die head due to the positional relationship of the channels. By reasonably controlling the extrusion speed, pressure and other parameters of each extrusion structure, the first fluid can form a layer in the middle, and the second fluids on both sides form the other two layers on the upper and lower sides respectively. The upper and lower layers are formed by the second fluid, which can give the sheet special surface properties. For example, the outer layer can be a material with good wear resistance and scratch resistance to protect the middle layer and the entire sheet; it can also be a material with antistatic, antibacterial and other functions to meet specific use environment requirements. The middle layer is formed by the first fluid, for example, it can be a material with good toughness, strength or barrier properties, providing mechanical support and basic physical properties for the sheet.

[0127] In step S810 to step S820, the output of the first extrusion structure and the second extrusion structure is adjusted according to the ratio of the first flow rate at the feed end of the first channel and the second flow rate at the feed end of the second channel and the preset raw material ratio value. This is crucial for forming a three-layer plastic sheet. The amount of raw materials in each layer can be accurately controlled to ensure that the thickness and composition ratio of the upper and lower layers (second fluid) and the middle layer (first fluid) meet the design requirements and improve the quality of the product. For example, when producing packaging sheets with specific barrier properties, accurately controlling the ratio of the middle barrier layer (first fluid) and the upper and lower functional layers (second fluid) can enable the sheet to achieve the best barrier effect and meet the barrier requirements for substances such as oxygen and water vapor.

[0128] In step S830 to step S840, the real-time temperature of the extrusion die is obtained and the heating power is adjusted after comparison with the preset standard temperature, which is of great significance to the molding quality of the three-layer plastic sheet. The appropriate temperature can ensure the fluidity of each layer of raw materials during the extrusion process, so that the three layers can be extruded evenly and tightly combined. If the temperature is too high or too low, it may lead to poor fusion between different layers or uneven thickness of each layer. For example, improper temperature may cause excessive flow of a layer of raw materials, change the originally designed three-layer structure ratio, and affect the performance of the sheet. Through precise temperature control, the integrity and stability of the three-layer structure can be ensured, thereby improving the quality of the sheet.

[0129] In a second aspect, the present application also provides an electronic device, comprising: at least one memory, at least one processor and at least one program, wherein the program is stored in the memory, and the processor executes one or more programs to implement the control method of the above-mentioned plastic sheet production equipment.

[0130] In the electronic device, the first roller coating device introduced in the control method can add a functional layer to the sheet by roller coating, avoiding the need to frequently add hardware equipment such as extruders. In the control method, the first thickness of the plastic sheet output from the cooling device and the second thickness of the plastic sheet output from the first roller coating device are obtained by using corresponding detection equipment. Subsequently, the first thickness and second thickness information obtained are combined with the preset first target coating thickness and input into the preset thickness adjustment model. After calculation and analysis, the corresponding adjustment instruction is output to accurately adjust the spacing between the first adjustment roller and the first coating roller. In this way, the plastic sheet can be attached to the desired thickness uniformly and accurately coated. At the same time, the first image of the plastic sheet output from the first roller coating device corresponding to the first side is obtained. Subsequently, the image is analyzed by image recognition processing technology to identify the type of roller coating defects therein. According to the first roller coating defect type obtained above, the coating parameters of the first adjustment roller are adjusted in a targeted manner. By precisely controlling the various parameters of the roller coating process, the coating can be evenly and stably attached to the plastic sheet, thus effectively avoiding roller coating defects and improving the quality of the final plastic sheet product. When the production line is dealing with the production of plastic sheets with different numbers of layers and different functional requirements, the flexible regulation of the roller coating device by this control method can be more conveniently switched and adjusted, without the need for the fixed configuration and complex transformation of the traditional extruder production line, which reduces production costs, improves production efficiency, and improves the production quality of plastic sheets through multi-faceted monitoring.

[0131] The memory may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required by at least one function; the data storage area may store relevant data of the control method of the above-mentioned plastic sheet material production equipment, etc. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device or other non-transient solid-state storage device. In some embodiments, the memory may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the processing module via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0132] One or more signals are stored in the memory, and when executed by one or more processors, the control method of the plastic sheet manufacturing device in any of the above method embodiments is executed.

[0133] In a third aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program, which is executed by one or more processors, enabling the one or more processors to execute the control method of the plastic sheet production equipment in the above method embodiment.

[0134] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, i.e., may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0135] Through the description of the above embodiments, it will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed methods above can be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, and the computer-readable medium can include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as a computer-readable signal, a data structure, a program module or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassette, magnetic tape, disk storage or other magnetic storage device, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media generally embodies computer readable signals, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0136] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0137] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the above units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0138] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0139] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0140] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including multiple instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), disk or optical disk and other media that can store programs.

[0141] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. A control method for a plastic sheet manufacturing device, characterized in that: Applicable to plastic sheet manufacturing equipment, the plastic sheet manufacturing equipment comprises: an extruding device, a cooling device, a first rolling device, a drying device and a winding device, the extruding device is used to extrude the plastic sheet and sequentially pass through the cooling device, the first rolling device, the drying device and the winding device, the first rolling device is used to apply a coating to the first side of the plastic sheet, and comprises a first adjusting roller and a first coating roller; The control method comprises: Acquire a first thickness of the plastic sheet output from the cooling device and a second thickness of the plastic sheet output from the first roller coating device; According to the first thickness, the second thickness and a preset first target coating thickness, adjusting the distance between the first regulating roller and the first coating roller by a preset thickness adjustment model; Acquire a first image of the plastic sheet output from the first roller coating device corresponding to the first side; Performing image recognition processing on the first image to obtain a first coating defect type; According to the first rolling coating defect type, the coating parameters of the first regulating roller are adjusted.

2. The control method of the plastic sheet manufacturing equipment according to claim 1, characterized in that: The step of adjusting the distance between the first regulating roller and the first coating roller by a preset thickness adjustment model according to the first thickness, the second thickness and a preset first target coating thickness comprises: determining an actual coating thickness according to the first thickness and the second thickness; Obtaining a thickness difference according to the actual coating thickness and the first target coating thickness; Obtaining a spacing adjustment value according to the thickness difference and a preset thickness adjustment model; The first adjusting roller is adjusted according to the spacing adjustment value to change the spacing between the first adjusting roller and the first coating roller.

3. The control method of the plastic color production equipment according to claim 2 is characterized in that: The thickness adjustment model is trained by the following steps: Acquire a plurality of historical distance change values ​​between the first regulating roller and the first coating roller, and a historical thickness change value corresponding to each of the historical distance change values; Obtaining a conversion coefficient according to the historical spacing change value and the corresponding historical thickness change value; The thickness adjustment model is established according to the conversion coefficient.

4. The control method of the plastic sheet manufacturing equipment according to claim 2, characterized in that: Before the step of adjusting the first adjusting roller according to the spacing adjustment value to change the spacing between the first adjusting roller and the first coating roller, the method further includes: Acquire a current distance value between the first regulating roller and the first coating roller; Obtaining an estimated spacing value according to the current spacing value and the spacing adjustment value; When the estimated spacing value is less than a preset spacing threshold, the first adjustment roller is not adjusted, and a first warning signal is generated; wherein the first warning signal is used to prompt that the first coating roller needs to be replaced.

5. The control method of plastic sheet manufacturing equipment according to claim 1, characterized in that: The performing image recognition processing on the first image to obtain a first coating defect type includes: Performing grayscale processing on the first image to obtain a grayscale image; Performing noise reduction and enhancement processing on the grayscale image to obtain a target image; Identify the target image, determine the high brightness area, and extract edge contour information of the high brightness area; Analyzing the edge profile information to obtain circularity; When the circularity is greater than or equal to a preset circularity threshold, it is determined that a first defect type exists; wherein the first defect type is used to characterize the presence of bubbles on the coating surface of the plastic sheet by the first coating device; According to the target image, a grayscale change rate is calculated; When the grayscale change rate is greater than or equal to a preset change threshold, it is determined that a second defect type exists; wherein the second defect type is used to characterize that the first coating device has uneven coating thickness on the coating surface of the plastic sheet.

6. The control method of the plastic sheet manufacturing equipment according to claim 5, characterized in that: The first rolling coating device further includes a scraper structure; and adjusting the coating parameters of the first regulating roller according to the first rolling coating defect type includes: When a first defect type exists, reducing the rotation speed of the first coating roller by a preset first rotation speed adjustment value; When the second defect type exists, the plastic sheet making equipment is stopped, and the scraper structure is controlled to scrape off the residual paint on the outer surface of the first paint roller until the outer surface of the first paint roller is restored to be flat, and then the plastic sheet making equipment is restarted.

7. The control method of plastic sheet manufacturing equipment according to claim 1, characterized in that: The plastic sheet manufacturing equipment also includes a second rolling device, which is arranged between the drying device and the winding device, and includes a steering structure, a second adjustment roller and a second coating roller. The second rolling device is used to apply coating to the second side of the plastic sheet, and the steering structure is used to flip the direction of the plastic sheet; The plastic sheet extruded by the extruding device passes through the cooling device, the first roller coating device, the drying device and the second roller coating device once, and then passes through the drying device and the winding device in sequence through the turning roller; The control method further comprises: Obtaining a third thickness of the plastic sheet outputted from the drying device for the first time, and a fourth thickness of the plastic sheet outputted from the second roller coating device; According to the third thickness, the fourth thickness and a preset second target coating thickness, adjusting the distance between the second regulating roller and the second coating roller by the thickness adjustment model; Acquire a second image of the plastic sheet output from the second roller coating device corresponding to the second side; Performing image recognition processing on the second image to obtain a second coating defect type; According to the second rolling coating defect type, the coating parameters of the second regulating roller are adjusted.

8. The control method of plastic sheet manufacturing equipment according to claim 1, characterized in that: The extrusion device comprises a first extrusion structure, a second extrusion structure, a layered structure and an extrusion die, wherein the first extrusion structure is used to extrude a first fluid, the second extrusion structure is used to extrude a second fluid, the layered structure comprises a first channel and a second channel, the feed end of the first channel is connected to the discharge end of the first extrusion structure, the feed end of the second channel is connected to the discharge end of the second extrusion structure, two second channels are provided and are respectively located on both sides of the first channel, the discharge ends of the first channel and the second channel are connected to the feed end of the extrusion die, and the discharge end of the extrusion die is used to extrude a plastic sheet; The control method further comprises: Obtaining a first flow rate at a feed end of the first channel and a second flow rate at a feed end of the second channel; According to the ratio of the first flow rate to the second flow rate and a preset raw material ratio value, adjusting the output of the first extrusion structure and the second extrusion structure; Obtaining the real-time temperature of the extrusion die; The heating power of the extrusion die is adjusted according to the real-time temperature and the preset standard temperature.

9. An electronic device, characterized in that: include: at least one memory; at least one processor; at least one program; The programs are stored in the memory, and the processor executes at least one of the programs to implement the control method of the plastic sheet manufacturing equipment according to any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer-executable signal, and the computer-executable signal is used to execute the control method of the plastic sheet manufacturing equipment according to any one of claims 1 to 8.

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