Intelligent printing control method for plastic packaging bag based on AI

Abstract

The invention is suitable for the technical field of intelligent intaglio printing control, provides an intelligent printing control method for plastic packaging bags based on AI, and is applied to an intelligent printing control system for plastic packaging bags based on AI. Comprising a gravure manufacturing module, a parameter determination module, a printing driving module, a surface processing module, an image acquisition module, a wireless communication module, a memory, an alarm, a processing center and an intelligent mobile terminal. The gravure manufacturing module, the parameter determining module, the printing driving module, the surface processing module, the image acquisition module, the wireless communication module, the memory and the alarm are respectively connected with the processing center; the invention further provides an AI-based intelligent printing control device for the plastic packaging bag. The device can be used for automatically preparing a printing plate, automatically setting printing parameters, automatically printing and automatically detecting, so that the quality of gravure images and texts on the surface of the packaging bag is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent gravure printing control, and in particular to an AI-based intelligent printing control method for plastic packaging bags. Background Art

[0002] AI is the abbreviation of Artificial Intelligence, which is a new technical science that studies and develops theories, methods, technologies and application systems for simulating, extending and expanding human intelligence. It is an important part of intelligent disciplines, including robots, speech recognition, image recognition, natural language processing, expert systems, machine learning, computer vision, etc.

[0003] In the field of printing, gravure printing products have a strong sense of three-dimensionality, rich layers, good tonal expression, good artistry and anti-counterfeiting performance, so they are particularly suitable for printing banknotes and exquisite anti-counterfeiting printed materials. A gravure printing machine is a machine that uses gravure printing. The graphic part of the printing plate is concave, while the blank part is on the same plane as the outer circle of the printing plate cylinder. It is printed by round-to-round direct printing, and the compression deformation of the elastic lining between the printing action surfaces is used to obtain printing pressure to complete the printing task; the printing principle of traditional gravure printing is to use the printing pressure between the printing plate cylinder and the impression cylinder to make the paper closely contact the surface of the printing plate, transfer the ink in the gravure pattern to the paper, and make the ink accumulate on the surface of the paper, forming a more obvious raised feel.

[0004] At present, gravure printing technology has unreasonable parameters such as printing pressure and temperature, which leads to abnormal problems such as paper deformation, texture and wrinkles, and its intelligence level is low. Summary of the invention

[0005] In order to solve the deficiencies in the prior art, the purpose of the present invention is to provide an AI-based intelligent printing control method and device for plastic packaging bags. By setting a gravure production module, a parameter determination module, a printing drive module, and a surface treatment module, the printing plate is automatically prepared, the printing parameters are automatically set, printing is automatically performed, detection is automatically performed, and water is automatically moistened to ensure the quality of the gravure graphics on the surface of the packaging bag, solve the problem of "abnormalities such as paper deformation, texture, and wrinkles due to unreasonable parameters such as printing pressure and temperature", improve printing efficiency, and reduce printing costs.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] An AI-based intelligent printing control method for plastic packaging bags is applied to an AI-based intelligent printing control system for plastic packaging bags, comprising a gravure production module, a parameter determination module, a printing drive module, a surface treatment module, an image acquisition module, a wireless communication module, a memory, an alarm, a processing center, and an intelligent mobile terminal; the gravure production module, the parameter determination module, the printing drive module, the surface treatment module, the image acquisition module, the wireless communication module, the memory, and the alarm are respectively connected to the processing center; the intelligent mobile terminal comprises a smart phone, a tablet computer or a smart remote control, which are respectively connected to the wireless communication module wireless network within the range of a wireless network or the Internet;

[0008] The wireless communication module is provided with a wireless network unit, which is responsible for sending and receiving wireless signals and automatically networking with the intelligent mobile terminal within the effective network range;

[0009] The alarm compares the actually acquired printing plate image quality information with the printing plate appearance quality standard stored in the memory, and automatically sounds an alarm and notifies the rework to remake the printing plate if there is any inconsistency; and compares the actual printing plate wear and corrosion resistance test data with the printing plate wear and corrosion resistance standard stored in the memory, and automatically sounds an alarm and notifies the rework to remake the printing plate; and compares the actually acquired appearance quality information of the packaging bag surface with the appearance quality standard of the packaging bag surface stored in the memory, and automatically sounds an alarm and notifies the re-test printing if there is any inconsistency; and compares the actual printed image wear test data with the wear test standard of the printed image on the packaging bag surface stored in the memory, and automatically sounds an alarm and notifies the rework to re-test printing if there is any inconsistency; and compares the actually acquired gravure image quality information on the packaging bag surface with the image quality standard on the packaging bag surface stored in the memory, and automatically sounds an alarm and notifies the rework to re-print if there is any inconsistency;

[0010] The memory is responsible for storing the information of the gravure production module, the parameter determination module, the printing drive module, the surface treatment module, the image acquisition module, the wireless communication module, and the alarm, as well as the printing plate appearance quality standard, the printing plate wear and corrosion resistance standard, the packaging bag surface appearance quality standard, the packaging bag surface graphics wear test standard, and the packaging bag surface graphics quality standard;

[0011] The processing center is responsible for information transmission among the gravure plate making module, parameter determination module, printing drive module, surface treatment module, image acquisition module, wireless communication module, alarm, and memory. It is the hub of the system and compares the image quality information of the printing plate actually obtained with the appearance quality standard of the printing plate stored in the memory: if they are inconsistent, the information is transmitted to the alarm and the workers are notified to rework and remake the printing plate; if they are consistent, the wear and corrosion resistance test is performed; and the wear and corrosion resistance test data of the actual printing plate is compared with the wear and corrosion resistance standard of the printing plate stored in the memory: if they are inconsistent, the information is transmitted to the alarm and the workers are notified to rework and remake the printing plate; if they are consistent, the printing plate is proved to be qualified and can be used for packaging bag printing; and according to the actual obtained The appearance quality information of the packaging bag surface is compared with the appearance quality standard of the packaging bag surface stored in the memory: if they are inconsistent, it is transmitted to the alarm and notified to re-test print; if they are consistent, it is transmitted to the wear test unit; and the actual printed image and text wear test data is compared with the wear test standard of the printed image and text on the packaging bag surface stored in the memory: if they are inconsistent, it is transmitted to the alarm and notified to rework and re-test print; if they are consistent, it means that the test print is qualified and set as the printing process parameter; and the actual obtained gravure image and text quality information on the packaging bag surface is compared with the image and text quality standard of the packaging bag surface stored in the memory: if they are inconsistent, it is transmitted to the alarm and notified to rework and re-print; if they are consistent, it is notified that the printing is qualified;

[0012] The gravure production module includes a graphic design unit, a digital plate making unit, and a wear-resistant and corrosion-resistant unit. According to the requirements of the target packaging bag, the required gravure printing plate is produced by mechanical engraving and transmitted to the parameter determination module.

[0013] The parameter determination module includes a pressure calculation unit, a speed calculation unit, a parameter optimization unit, a pigment mixing unit, and an abrasion resistance test unit. According to the graphic requirements of the packaging bag to be printed, the module is connected to the industry database to obtain the best industry-related printing parameters for trial printing to determine the final printing parameters, and transmits them to the printing drive module.

[0014] The printing drive module includes a substrate confirmation unit, an equipment inspection unit, an intaglio confirmation unit, an ink knife inspection unit, and an acceleration test unit. According to predetermined printing parameters, the intaglio image and text on the surface of the packaging bag are printed by the printing equipment and transmitted to the surface treatment module.

[0015] The surface treatment module includes a drying unit, a film-coating and softening unit, a glazing and hot stamping unit, and a cutting and folding unit, which are responsible for drying, laminating, cutting, glazing, and folding the gravure images and texts on the surface of the finished packaging bag to ensure the clarity of the images and texts and meet customer requirements, and transmit them to the image acquisition module;

[0016] The image acquisition module obtains the image of the gravure printing plate and the image of the gravure text on the surface of the packaging bag through a high-definition camera, converts them into recognizable printing plate image quality information and gravure text quality information on the surface of the packaging bag, and transmits them to the processing center.

[0017] The present invention provides an AI-based intelligent printing control method for plastic packaging bags, comprising the following steps:

[0018] S10, before printing, the gravure production module produces the required gravure printing plate by mechanical engraving according to the requirements of the target packaging bag, and transmits it to the parameter determination module;

[0019] S20, the parameter determination module obtains the best industry-related printing parameters based on the graphic requirements of the packaging bag to be printed and is connected to the industry database for trial printing to determine the final printing parameters, and transmits them to the printing driver module;

[0020] S30, the printing drive module prints the required gravure pattern on the surface of the packaging bag through the printing device according to the predetermined printing parameters, and transmits it to the surface processing module;

[0021] S40, the surface treatment module dries, laminates, cuts, glazes, and folds the gravure images on the surface of the finished packaging bag to ensure the image clarity and customer requirements, and transmits it to the image acquisition module;

[0022] S50, the image acquisition module obtains the image information of the gravure image on the surface of the packaging bag through a high-definition camera and converts it into recognizable quality information of the gravure image on the surface of the packaging bag, and transmits it to the processing center;

[0023] S60, the processing center compares the actually acquired gravure image quality information on the packaging bag surface with the image quality standard on the packaging bag surface stored in the memory: if they are inconsistent, the information is transmitted to the alarm and a rework and reprinting notification is given; if they are consistent, the printing is notified as qualified.

[0024] Further, the step S10 comprises the following steps:

[0025] S11, the graphic design unit obtains the image information of the graphic pattern to be printed through scanning software and converts it into three-dimensional image information, and transmits it to the digital plate making unit;

[0026] S12, the digital plate making unit makes a printing plate required for gravure printing through a digital printing device according to the three-dimensional image information, and transmits it to the image acquisition module;

[0027] S13, the image acquisition module obtains the image of the gravure printing plate through a high-definition camera and converts it into recognizable plate image quality information, and transmits it to the processing center;

[0028] S14, the processing center compares the actually acquired printing plate image quality information with the printing plate appearance quality standard stored in the memory: if they are inconsistent, the information is transmitted to the alarm and the printing plate is notified to be reworked and remade; if they are consistent, the wear and corrosion resistance test is carried out;

[0029] S15. The wear-resistance and corrosion-resistance unit performs wear-resistance and corrosion-resistance tests on the printing plates with qualified surface appearance through wear-resistance and corrosion-resistance testing equipment to obtain wear-resistance and corrosion-resistance test data, and transmits it to the processing center;

[0030] S16. The processing center compares the wear and corrosion resistance test data of the actual printing plate with the wear and corrosion resistance standard of the printing plate stored in the memory: if they are inconsistent, the alarm is transmitted to the alarm and the printing plate is notified to be reworked and remade; if they are consistent, the printing plate is proved to be qualified and can be used for packaging bag printing.

[0031] Further, the step S20 comprises the following steps:

[0032] S21, the pressure calculation unit obtains the printing pressure according to the printing pressure calculation formula "P = (K*F*D) / L, P is the pressure (N), K is the K value coefficient, F is the pressure between the roller end faces (KPa), D is the roller diameter (mm), and L is the roller length (mm)", and transmits it to the speed calculation unit;

[0033] S22, the speed calculation unit calculates the printing speed according to the printing speed calculation formula "υ2=(S*n*υ1] / 10000, υ2 is the printing speed (sheets / h), S is the paper area size (cm 2 ), n is the printing coefficient (1 / cm 2 ),υ1 is the printing press speed (sheets / h)” to obtain the required printing speed and pass it to the parameter optimization unit;

[0034] S23, the parameter optimization unit obtains matching and optimization of similar printing parameters in the industry according to the calculated printing pressure and printing speed and the industry database, selects the best industry parameters as the predetermined printing parameters, and transmits them to the pigment mixing unit;

[0035] S24, the pigment mixing unit mixes various colors into target color inks in proportion accurately according to the color standard required by the customer to achieve the required printing effect, and transmits it to the trial printing control unit;

[0036] S25, the trial printing control unit performs trial gravure printing on the surface of the packaging bag through a printing machine according to predetermined printing parameters to confirm the optimization of the printing effect, and transmits the result to the image acquisition module;

[0037] S26, the image acquisition module obtains the image quality information of the surface of the packaging bag after the trial printing through the set high-definition camera, and transmits it to the processing center;

[0038] S27, the processing center compares the appearance quality information of the packaging bag surface actually obtained with the appearance quality standard of the packaging bag surface stored in the memory: if they are inconsistent, the information is transmitted to the alarm and a re-test is notified; if they are consistent, the information is transmitted to the wear resistance test unit;

[0039] S28, the wear-resistance test unit performs a wear-resistance test on the graphics and texts printed on the surface of the packaging bag with qualified appearance through the wear-resistance detection equipment to obtain the wear-resistance test data, and transmits it to the processing center;

[0040] S29. The processing center compares the actual printed image wear test data with the wear test standard of the printed image on the packaging bag surface stored in the memory: if they are inconsistent, the alarm is transmitted to the alarm and the rework and re-test printing are notified; if they are consistent, it means that the test print is qualified and is set as the printing process parameter.

[0041] Furthermore, before the step S30 of "printing the required gravure image on the surface of the packaging bag by a printing device", the following steps are also included:

[0042] S31, the substrate confirmation unit checks the surface quality of the substrate film to be printed through a scanner and confirms whether it meets the printing requirements, and transmits it to the equipment inspection unit;

[0043] S32, the equipment inspection unit uses a high-definition camera to obtain information about whether there are no foreign objects around the printing press and its supporting equipment, and confirms whether the plate rollers, operation, lubrication, oil circuits, and instruments are normal, and transmits this information to the gravure plate confirmation unit;

[0044] S33, the gravure plate confirmation unit uses an intelligent sensor to confirm whether the engraved gravure plate is firmly installed and whether the tightness of the plate roller is appropriate, and transmits it to the ink knife inspection unit;

[0045] S34, the ink blade inspection unit obtains whether the angle between the ink blade and the tangent line of the contact point of the printing roller is appropriate and whether the position of the ink blade and the hard blade lining is correct through the intelligent sensor, and transmits it to the acceleration test unit;

[0046] S35, the acceleration test unit confirms whether the control of the printing press speed by the continuously variable speed system is normal through the acceleration sensor, so as to ensure the accuracy of the printing speed during printing and the quality of graphic printing.

[0047] Further, the step S40 includes the following steps:

[0048] S41, the drying processing unit dries the gravure pattern on the surface of the finished packaging bag through a drying device and removes surface abnormalities to remove surface moisture to ensure the dryness of the paper surface, and transfers it to the film softening unit;

[0049] S42, the laminating and softening unit laminates and softens the surface of the dried packaging bag paper through the laminating equipment to increase its durability and foldability, and transfers it to the glazing and hot stamping unit;

[0050] S43, the glazing and hot stamping unit performs glazing or hot stamping on the surface of the packaging bag paper after the film is softened, so as to make the surface of the plastic packaging bag more bright and beautiful, and transfers it to the cutting and folding unit;

[0051] S44, the cutting and folding unit performs die-cutting, back gluing and folding processing on the glazed packaging bag paper to form a plastic packaging bag, which is ready for packaging and shipment.

[0052] The present invention provides an AI-based intelligent printing control system for plastic packaging bags, which also includes a computer-readable storage medium containing a memory; the memory stores a computer program, and when the functional modules execute the computer program, the steps of the above-mentioned AI-based intelligent printing control method for plastic packaging bags are implemented; the computer-readable storage medium stores a computer program, and when the computer program is executed by the functional modules, the steps of the above-mentioned AI-based intelligent printing control method for plastic packaging bags are implemented.

[0053] The present invention also provides an AI-based intelligent printing control device for plastic packaging bags, which is implemented by the above-mentioned AI-based intelligent printing control method for plastic packaging bags.

[0054] The beneficial effects of the present invention compared with the prior art are as follows:

[0055] By setting up the gravure production module, parameter determination module, printing drive module and surface treatment module, the printing plate is automatically prepared, the printing parameters are automatically set, printing is automatically performed, detection is automatically performed and water is automatically moistened to ensure the quality of the gravure graphics on the surface of the packaging bag. The problem of "abnormalities such as paper deformation, texture and wrinkles due to unreasonable parameters such as printing pressure and temperature" is solved, the printing efficiency is improved and the printing cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0057] Figure 1 It is a schematic diagram of the system module of the present invention;

[0058] Figure 2 It is a schematic diagram of the gravure production module of the present invention;

[0059] Figure 3 It is a schematic diagram of a parameter determination module of the present invention;

[0060] Figure 4 It is a schematic diagram of a printing drive module of the present invention;

[0061] Figure 5 It is a schematic diagram of a surface treatment module of the present invention;

[0062] Figure 6 It is a schematic diagram of the method flow control program of the present invention;

[0063] Figure 7 This is a schematic diagram of step S10 in the method flow of the present invention;

[0064] Figure 8 This is a schematic diagram of step S20 in the method flow of the present invention;

[0065] Fig. 9 It is a schematic diagram of the procedure before step S30 in the method flow of the present invention;

[0066] Fig.10 It is a program schematic diagram of step S40 in the method flow of the present invention. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0068] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments:

[0069] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0070] It should be noted that when a module is referred to as being "disposed on" another module, it can be directly on the other module or indirectly on the other module. When a module is referred to as being "connected to" another module, it can be directly connected to the other module or indirectly connected to the other module.

[0071] In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0072] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. The terms "include", "comprise", "have" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0073] See also Figure 1 As shown, the present invention provides an AI-based intelligent printing control method for plastic packaging bags, which is applied to an AI-based intelligent printing control system for plastic packaging bags, including a gravure production module, a parameter determination module, a printing drive module, a surface treatment module, an image acquisition module, a wireless communication module, a memory, an alarm, a processing center, and an intelligent mobile terminal; the gravure production module, the parameter determination module, the printing drive module, the surface treatment module, the image acquisition module, the wireless communication module, the memory, and the alarm are respectively connected to the processing center; the intelligent mobile terminal includes a smart phone, a tablet computer or a smart remote control, which are respectively connected to the wireless communication module wireless network within the range of a wireless network or the Internet.

[0074] The wireless communication module is provided with a wireless network unit, which is responsible for sending and receiving wireless signals and automatically networking with the intelligent mobile terminal within an effective network range.

[0075] Furthermore, the wireless network unit includes but is not limited to wireless networks such as Bluetooth, WiFi, mobile communications, the Internet, wireless local area networks, and communication modules with receiving and sending functions of the Internet of Things such as ZigBee, Z-Wave, MQTT (Message Queuing Telemetry Transport), CoAP (Constrained Application Protocol), HTTP (Hypertext Transfer Protocol), and LoRaWAN (Long Range Wide Area Network).

[0076] The alarm compares the actually acquired printing plate image quality information with the printing plate appearance quality standard stored in the memory, and automatically sounds an alarm and notifies the rework to remake the printing plate if there is any inconsistency; and compares the actual printing plate wear and corrosion resistance test data with the printing plate wear and corrosion resistance standard stored in the memory, and automatically sounds an alarm and notifies the rework to remake the printing plate; and compares the actually acquired packaging bag surface appearance quality information with the packaging bag surface appearance quality standard stored in the memory, and automatically sounds an alarm and notifies the re-trial printing if there is any inconsistency; and compares the actual printed image wear resistance test data with the wear resistance test standard of the printed image on the packaging bag surface stored in the memory, and automatically sounds an alarm and notifies the rework to re-trial printing if there is any inconsistency; and compares the actually acquired gravure image quality information on the packaging bag surface with the image quality standard on the packaging bag surface stored in the memory, and automatically sounds an alarm and notifies the rework to re-print if there is any inconsistency.

[0077] The memory is responsible for storing information of the gravure production module, parameter determination module, printing drive module, surface treatment module, image acquisition module, wireless communication module, and alarm, as well as the printing plate appearance quality standards, the printing plate wear and corrosion resistance standards, the packaging bag surface appearance quality standards, the packaging bag surface graphics and text wear test standards, and the packaging bag surface graphics and text quality standards.

[0078] The processing center is responsible for information transmission among the gravure plate making module, parameter determination module, printing drive module, surface treatment module, image acquisition module, wireless communication module, alarm, and memory. It is the hub of the system and compares the image quality information of the printing plate actually obtained with the appearance quality standard of the printing plate stored in the memory: if they are inconsistent, the information is transmitted to the alarm and the workers are notified to rework and remake the printing plate; if they are consistent, the wear and corrosion resistance test is performed; and the wear and corrosion resistance test data of the actual printing plate is compared with the wear and corrosion resistance standard of the printing plate stored in the memory: if they are inconsistent, the information is transmitted to the alarm and the workers are notified to rework and remake the printing plate; if they are consistent, the printing plate is proved to be qualified and can be used for packaging bag printing; and according to the actual obtained The appearance quality information of the packaging bag surface is compared with the appearance quality standard of the packaging bag surface stored in the memory: if they are inconsistent, it is transmitted to the alarm and notified to re-test print; if they are consistent, it is transmitted to the wear resistance test unit; and the actual printed image wear resistance test data is compared with the wear resistance test standard of the printed image on the packaging bag surface stored in the memory: if they are inconsistent, it is transmitted to the alarm and notified to rework and re-test print; if they are consistent, it means that the trial print is qualified and set as the printing process parameter; and the gravure image quality information actually obtained on the packaging bag surface is compared with the image quality standard of the packaging bag surface stored in the memory: if they are inconsistent, it is transmitted to the alarm and notified to rework and re-print; if they are consistent, it is notified that the printing is qualified.

[0079] See also Figure 7 As shown, the gravure production module includes a graphic design unit, a digital plate making unit, and a wear-resistant and corrosion-resistant unit. According to the requirements of the target packaging bag, the required gravure printing plate is produced by mechanical engraving and passed to the parameter determination module.

[0080] Furthermore, the graphic design unit obtains image information of the graphic pattern to be printed through scanning software and converts it into three-dimensional image information, and transmits it to the digital platemaking unit; the digital platemaking unit produces the printing plate required for gravure printing through digital printing equipment according to the three-dimensional image information, and transmits it to the image acquisition module; the wear-resistant and corrosion-resistant unit performs wear-resistant and corrosion-resistant testing on the printing plate with qualified surface appearance through wear-resistant and corrosion-resistant testing equipment to obtain wear-resistant and corrosion-resistant test data, and transmits it to the processing center.

[0081] See also Figure 3 As shown, the parameter determination module includes a pressure calculation unit, a speed calculation unit, a parameter optimization unit, a pigment mixing unit, and an abrasion resistance testing unit. According to the graphic requirements of the packaging bag to be printed and connected to the industry database, the optimal industry-similar printing parameters are obtained for trial printing to determine the final printing parameters and pass them to the printing driver module.

[0082] Further, the pressure calculation unit obtains the printing pressure according to the printing pressure calculation formula "P = (K*F*D) / L, P is the pressure (N), K is the K value coefficient, F is the pressure between the roller end faces (KPa), D is the roller diameter (mm), and L is the roller length (mm)", and transmits it to the speed calculation unit; the speed calculation unit obtains the printing pressure according to the printing speed calculation formula "υ2 = (S*n*υ1] / 10000, υ2 is the printing speed (sheet / h), S is the paper area size (cm 2 ), n is the printing coefficient (1 / cm 2 ), υ1 is the printing machine speed (sheets / h)” to obtain the required printing speed and pass it to the parameter optimization unit; the parameter optimization unit obtains matching and optimization of similar printing parameters in the industry according to the calculated printing pressure and printing speed and the industry database, selects the optimal industry parameters as the predetermined printing parameters, and passes them to the pigment mixing unit; the pigment mixing unit accurately mixes various colors into inks of target colors according to the color standards required by the customer in proportion to achieve the required printing effect, and passes it to the trial printing control unit; the trial printing control unit performs trial gravure printing on the surface of the packaging bag through the printing press according to the predetermined printing parameters to confirm the optimization of its printing effect, and passes it to the image acquisition module; the wear resistance testing unit performs a wear resistance test on the graphics and texts printed on the surface of the packaging bag with qualified appearance through the wear resistance testing equipment to obtain wear resistance test data, and passes it to the processing center.

[0083] See also Figure 4As shown, the printing drive module includes a substrate confirmation unit, an equipment inspection unit, a gravure confirmation unit, an ink knife inspection unit, and an acceleration test unit. According to predetermined printing parameters, the required gravure image and text on the surface of the packaging bag are printed through the printing equipment and transmitted to the surface processing module.

[0084] Furthermore, before "printing the required gravure images and texts on the surface of the packaging bag through the printing equipment", it includes: the substrate confirmation unit checks the surface quality of the substrate film to be printed through a scanner and confirms whether it meets the printing requirements, and transmits it to the equipment inspection unit; the equipment inspection unit obtains whether there are foreign objects around the printing machine and its supporting equipment through a high-definition camera and confirms whether the plate roller, operation, lubrication, oil circuit, and instrument are normal, and transmits it to the gravure confirmation unit; the gravure confirmation unit confirms whether the engraved gravure is firmly installed and whether the tightness of the fit with the plate roller is appropriate through an intelligent sensor, and transmits it to the ink knife inspection unit; the ink knife inspection unit obtains whether the angle between the tangent of the contact point of the scraper and the printing roller is appropriate and whether the position with the hard knife lining is correct through an intelligent sensor, and transmits it to the acceleration test unit; the acceleration test unit confirms whether the control of the printing machine speed by the continuously variable transmission system is normal through the acceleration sensor, so as to ensure the accuracy of the printing speed during printing and the quality of image printing.

[0085] See also Figure 5 As shown, the surface treatment module includes a drying processing unit, a laminating and softening unit, a glazing and hot stamping unit, and a cutting and folding unit, which are responsible for drying, laminating, cutting, glazing, and folding the gravure images on the surface of the finished packaging bag to ensure the clarity of the images and texts and meet customer requirements, and transmit them to the image acquisition module.

[0086] Furthermore, the drying processing unit dries the gravure images and texts on the surface of the finished packaging bag through a drying device and removes surface abnormalities to remove surface moisture to ensure the dryness of the paper surface, and transfers it to the coating and softening unit; the coating and softening unit coats and softens the surface of the dried packaging bag paper through a coating device to increase its durability and foldability, and transfers it to the glazing and hot stamping unit; the glazing and hot stamping unit performs surface glazing or hot stamping on the coated and softened packaging bag paper to make the surface of the plastic packaging bag brighter and more beautiful, and transfers it to the cutting and folding unit; the cutting and folding unit performs die-cutting, back-gluing and folding on the glazed packaging bag paper to form a plastic packaging bag, waiting for packaging and shipment.

[0087] S13, the image acquisition module obtains the image of the gravure printing plate and the image of the gravure pattern on the surface of the packaging bag through a high-definition camera, converts them into recognizable printing plate image quality information and gravure pattern quality information on the surface of the packaging bag, and transmits them to the processing center.

[0088] System operation working principle:

[0089] Before printing, the gravure plate making module makes the required gravure printing plate through mechanical engraving according to the requirements of the target packaging bag, and passes it to the parameter determination module, including: controlling the graphic design unit to obtain the image information of the graphic pattern to be printed through scanning software and convert it into three-dimensional image information, and pass it to the digital plate making unit; the digital plate making unit makes the gravure printing plate through digital printing equipment according to the three-dimensional image information, and passes it to the image acquisition module; then the image acquisition module obtains the image of the gravure printing plate through a high-definition camera and converts it into recognizable plate image quality information, and passes it to the processing center; The processing center compares the plate image quality information actually obtained with the plate appearance quality standard stored in the memory: if they are inconsistent, the information is transmitted to the alarm and the plate is notified to be reworked and remade; if they are consistent, the wear and corrosion resistance test is carried out; the wear and corrosion resistance unit is controlled to carry out wear and corrosion resistance test on the plate with qualified appearance surface through the wear and corrosion resistance testing equipment to obtain the wear and corrosion resistance test data, and transmit it to the processing center; the processing center compares the wear and corrosion resistance test data of the actual plate with the wear and corrosion resistance standard of the plate stored in the memory: if they are inconsistent, the information is transmitted to the alarm and the plate is notified to be reworked and remade; if they are consistent, it is proved that the plate is qualified and can be used for packaging bag printing;

[0090] Then the parameter determination module obtains the best industry-like printing parameters according to the graphic requirements of the packaging bag to be printed and is connected to the industry database for trial printing to determine the final printing parameters, and transmits them to the printing drive module, including: obtaining the printing pressure through the pressure calculation unit according to the printing pressure calculation formula "P = (K*F*D) / L, P is the pressure (N), K is the K value coefficient, F is the pressure between the roller end faces (KPa), D is the roller diameter (mm), and L is the roller length (mm)", and transmitting it to the speed calculation unit; then the speed calculation unit obtains the printing pressure according to the printing speed calculation formula "υ2 = (S*n*υ1] / 10000, υ2 is the printing speed (sheet / h), S is the paper area size (cm 2 ), n is the printing coefficient (1 / cm 2), υ1 is the printing machine speed (sheets / h)” to obtain the required printing speed and pass it to the parameter optimization unit; the parameter optimization unit obtains the matching and optimization of similar printing parameters in the industry according to the calculated printing pressure, printing speed and industry database, selects the optimal industry parameters as the predetermined printing parameters, and passes them to the pigment mixing unit; then the pigment mixing unit accurately mixes various colors into target color inks according to the color standards required by the customer in proportion to achieve the required printing effect, and passes it to the trial printing control unit; the trial printing control unit performs a trial gravure printing on the surface of the packaging bag according to the predetermined printing parameters and through the printing press to confirm the optimization of its printing effect, and passes it to the image acquisition module; then the image acquisition module obtains the image through the set high-definition camera The image quality information of the graphics and texts on the surface of the packaging bag after the trial printing is transmitted to the processing center; the processing center compares the appearance quality information of the packaging bag surface actually obtained with the appearance quality standard of the packaging bag surface stored in the memory: if they are inconsistent, it is transmitted to the alarm and notified to re-trial printing; if they are consistent, it is transmitted to the wear test unit; then the wear test unit performs a wear test on the graphics and texts printed on the surface of the packaging bag with qualified appearance through the wear testing equipment to obtain the wear test data, and transmits it to the processing center; the processing center compares the actual printed graphics and text wear test data with the wear test standard of the graphics and texts printed on the surface of the packaging bag stored in the memory: if they are inconsistent, it is transmitted to the alarm and notified to rework and re-trial printing; if they are consistent, it means that the trial printing is qualified and is set as the printing process parameter;

[0091] The printing drive module prints the required gravure images and texts on the surface of the packaging bag through the printing equipment according to the predetermined printing parameters, and transmits them to the surface treatment module. Prior to this, it also includes: controlling the substrate confirmation unit to check the surface quality of the substrate film to be printed through a scanner and confirm whether it meets the printing requirements, and transmit it to the equipment inspection unit; then the equipment inspection unit obtains whether there are foreign objects around the printing machine and its supporting equipment through a high-definition camera and confirms whether the plate roller, operation, lubrication, oil circuit, and instrument are normal, and transmits them to the gravure confirmation unit; controlling the gravure confirmation unit to confirm whether the engraved gravure is firmly installed and whether the tightness of the matching with the plate roller is appropriate through an intelligent sensor, and transmits it to the ink knife inspection unit; then the ink knife inspection unit obtains whether the angle between the tangent line of the contact point of the scraper and the printing roller is appropriate and whether the position with the hard knife lining is correct through the intelligent sensor, and transmits it to the acceleration test unit; controlling the acceleration test unit to confirm whether the control of the printing machine speed by the continuously variable speed system is normal through the acceleration sensor, so as to ensure the accuracy of the printing speed during printing and the quality of image and text printing,

[0092] Then the surface treatment module dries, laminates, cuts, glazes, and folds the gravure images on the surface of the finished packaging bag to ensure the clarity of the images and meet customer requirements, and transmits them to the image acquisition module, including: controlling the drying processing unit to dry the gravure images on the surface of the finished packaging bag through the drying equipment and remove surface abnormalities to remove surface moisture to ensure the dryness of the paper surface, and transmits them to the laminating and softening unit; then the laminating and softening unit laminates and softens the dried packaging bag paper through the laminating equipment to increase its durability and foldability, and transmits it to the glazing and hot stamping unit; the glazing and hot stamping unit performs surface glazing or hot stamping on the packaging bag paper after laminating and softening to make the surface of the plastic packaging bag more beautiful and beautiful, and transmits it to the cutting and folding unit; controlling the cutting and folding unit to die-cut, back-glue, and fold the glazed packaging bag paper to form a plastic packaging bag, waiting for packaging and shipment;

[0093] Then the image acquisition module obtains the image information of the gravure image on the surface of the packaging bag through a high-definition camera and converts it into recognizable gravure image quality information on the surface of the packaging bag, and transmits it to the processing center; the processing center compares the gravure image quality information on the surface of the packaging bag actually obtained with the image quality standard on the surface of the packaging bag stored in the memory: if there is inconsistency, it is transmitted to the alarm and notified to rework and reprint; if there is consistency, it is notified that the printing is qualified.

[0094] When the operator or manager is outdoors or on a business trip, he or she can use a smart phone or tablet computer to automatically connect to the wireless network or the Internet through the wireless communication module, and can remotely control the printing status of the packaging bag to achieve networked and intelligent control and improve production efficiency and management efficiency.

[0095] See also Figure 6 As shown, the present invention provides an AI-based intelligent printing control method for plastic packaging bags, comprising the following steps:

[0096] S10, before printing, the gravure production module produces the required gravure printing plate by mechanical engraving according to the requirements of the target packaging bag, and transmits it to the parameter determination module;

[0097] Furthermore, the mechanical engraving method refers to a printing plate making method that uses CNC machines such as drilling machines and planers to cut different patterns and shapes from the surface of an object according to predetermined sizes and patterns using cutting tools.

[0098] See also Figure 7 As shown, the step S10 includes the following steps:

[0099] S11, the graphic design unit obtains the image information of the graphic pattern to be printed through scanning software and converts it into three-dimensional image information, and transmits it to the digital plate making unit;

[0100] Furthermore, the scanning software refers to tool software that scans various paper documents and materials into a computer through a regular or high-speed scanner, processes, compresses, optimizes and stores them as electronic image files, including but not limited to image scanning software, system security scanning software, barcode scanning software and QR code scanning software.

[0101] S12, the digital plate making unit makes a printing plate required for gravure printing through a digital printing device according to the three-dimensional image information, and transmits it to the image acquisition module;

[0102] Furthermore, the printing plate refers to the plate making required for gravure printing, which is made of copper plate, zinc plate, nickel plate and other materials through multiple processes such as etching and polishing, and then the required pattern or text is printed on the plate through photoresist, exposure, etching and other steps.

[0103] S13, the image acquisition module obtains the image of the gravure printing plate through a high-definition camera and converts it into recognizable plate image quality information, and transmits it to the processing center;

[0104] Furthermore, the high-definition camera can shoot at a 360-degree angle, and can capture images of various points on the surface of the printing plate from multiple different angles, identify different points on the surface of the printing plate at different angles, and thus more accurately and comprehensively identify the various points on the surface of the printing plate and their shapes, or based on images of various graphics and texts on multiple printing plate surfaces captured from different angles, identify the graphic quality information on the surface of the printing plate by multi-angle matching, and then determine the various graphic and text positions on the surface of the printing plate.

[0105] S14, the processing center compares the actually acquired printing plate image quality information with the printing plate appearance quality standard stored in the memory: if they are inconsistent, the information is transmitted to the alarm and the printing plate is notified to be reworked and remade; if they are consistent, the wear and corrosion resistance test is carried out;

[0106] Furthermore, the printing plate appearance quality standard includes flatness requirements such as clear images and texts, well-proportioned convex and concave surfaces, distinct contours, and overall flatness, so as to ensure good printing effects such as the overall flatness of the subsequent printed surface and the clarity of images and texts.

[0107] S15. The wear-resistance and corrosion-resistance unit performs wear-resistance and corrosion-resistance tests on the printing plates with qualified surface appearance through wear-resistance and corrosion-resistance testing equipment to obtain wear-resistance and corrosion-resistance test data, and transmits it to the processing center;

[0108] Furthermore, the wear and corrosion resistance test refers to the printing plate being tested through numerous simulated printings to test whether the wear resistance and corrosion resistance meet the predetermined requirements, which can ensure that the printing plate can be used for a long time during the printing process without damage and deformation, thereby ensuring the quality and life of the printing plate.

[0109] S16. The processing center compares the wear and corrosion resistance test data of the actual printing plate with the wear and corrosion resistance standard of the printing plate stored in the memory: if they are inconsistent, the alarm is transmitted to the alarm and the printing plate is notified to be reworked and remade; if they are consistent, the printing plate is proved to be qualified and can be used for packaging bag printing.

[0110] S20, the parameter determination module obtains the best industry-related printing parameters based on the graphic requirements of the packaging bag to be printed and is connected to the industry database for trial printing to determine the final printing parameters, and transmits them to the printing driver module;

[0111] See also Figure 8 As shown, the step S20 includes the following steps:

[0112] S21, the pressure calculation unit obtains the printing pressure according to the printing pressure calculation formula "P = (K*F*D) / L, P is the pressure (N), K is the K value coefficient, F is the pressure between the roller end faces (KPa), D is the roller diameter (mm), and L is the roller length (mm)", and transmits it to the speed calculation unit;

[0113] Further explanation: K is the K value coefficient, which is the shape of the roller profile and is generally around 1.2, while F is the pressure between the roller end faces (kPa), D is the roller diameter (mm), and L is the roller length (mm), which are all known parameters and pre-stored in the system. The system automatically provides these parameter data during calculation.

[0114] S22, the speed calculation unit calculates the printing speed according to the printing speed calculation formula "υ2=(S*n*υ1] / 10000, υ2 is the printing speed (sheets / h), S is the paper area size (cm 2 ), n is the printing coefficient (1 / cm 2 ),υ1 is the printing press speed (sheets / h)” to obtain the required printing speed and pass it to the parameter optimization unit;

[0115] To further explain, S is the paper area size. Since the printing time required for different sizes of paper is different, the paper size is obtained by scanning during printing; n is the printing coefficient, which refers to whether the paper is printed on one side or two sides. The printing time required for the two is completely different, and it needs to be selected according to the actual situation. The coefficient is 1 for single-sided printing and 2 for double-sided printing; υ1 is the speed of the printing machine, that is, the number of sheets that can be printed per hour. It is generally specified in the equipment manual and can also be obtained through actual testing. As the machine continues to age, the printing speed of the machine will become slower and slower. For example: If a printing machine can print 6,000 sheets of A4-sized single-sided paper per hour, the area of ​​A4 paper is 21×29.7=623.7cm2 , then the actual printing speed is υ2=(S*n*υ1] / 10000=(623.7*1*8000) / 10000=498.96 (sheets / h).

[0116] S23, the parameter optimization unit obtains matching and optimization of similar printing parameters in the industry according to the calculated printing pressure and printing speed and the industry database, selects the best industry parameters as the predetermined printing parameters, and transmits them to the pigment mixing unit;

[0117] Furthermore, the similar printing parameters in the industry refer to the gravure printing process parameters used by the gravure printing industry for similar packaging bags using similar printing equipment, including printing speed, printing pressure, dampening water volume, temperature, humidity, etc.; the printing speed refers to the speed at which the gravure printing equipment prints packaging bags, which determines the efficiency of the printing process in terms of the number of sheets printed per hour (IPH) or the number of plates printed per hour; the printing pressure refers to the pressure applied by the gravure printing equipment to the substrate to achieve the desired printing effect; the dampening water volume refers to the amount of water provided to the printing plate by the variable speed drive device in the dampening system during the printing process to keep the printing plate clean and stable. It can help remove ink residue on paper, prevent ink accumulation and blurring to ensure printing quality, reduce damage to paper and ink, and extend the service life of printing equipment; the temperature refers to the fact that during printing, changes in indoor temperature will directly affect the water absorption, and then affect the tension, flatness and shrinkage of the paper. Too high or too low temperature may cause unclear ink color. The temperature should generally be maintained within the range of 20℃-25℃; the humidity refers to the fact that during printing, indoor humidity also affects its water absorption and flatness. High humidity or low humidity will also affect the permeability of the paper, and will also affect its water absorption and flatness. The relative humidity is generally between 50% and 60%.

[0118] S24, the pigment mixing unit mixes various colors into target color inks in proportion accurately according to the color standard required by the customer to achieve the required printing effect, and transmits it to the trial printing control unit;

[0119] Furthermore, the target color ink refers to the ink adjusted according to the specific color block or color number provided by the customer. The basic pigments are first mixed, and diluents, additives, etc. are added, and then fine-tuned to accurately mix various colors into inks with the required pigments, so that the color is closer to the required color to achieve the required printing effect.

[0120] To further explain, after the ink is adjusted, it is also necessary to prepare raw materials such as copper plates, plates, solvents, inks, plate washing liquids, rubber rollers, printing presses, etc. for gravure printing, and it is necessary to ensure that their quality meets the printing requirements to ensure the subsequent final printing effect.

[0121] S25, the trial printing control unit performs trial gravure printing on the surface of the packaging bag through a printing machine according to predetermined printing parameters to confirm the optimization of the printing effect, and transmits the result to the image acquisition module;

[0122] Furthermore, the gravure printing refers to installing the plate material through a printing press and optimizing the printing pressure and printing speed, and processing and adjusting the sponge roller and the pressure roller to make the quality of the printed images and texts on the surface of the packaging bag better.

[0123] To further explain, after color matching, the printing plate needs to be placed on the printing press, and the printing plate position needs to be adjusted to ensure that it is correct, the printing press is operating normally, and the pigment mixing is correct compared with the customer's color plate, as well as the paper selection for the packaging bag, to ensure the normal operation of the printing press.

[0124] S26, the image acquisition module obtains the image quality information of the surface of the packaging bag after the trial printing through the set high-definition camera, and transmits it to the processing center;

[0125] Furthermore, the graphic image quality information refers to the image of the surface of the packaging bag after trial printing obtained by a high-definition camera, and the image is processed, analyzed and understood by image recognition software, and the image quality information of the targets and objects of the packaging bag in various modes is identified by a deep learning algorithm, including image acquisition, image preprocessing, feature extraction, and image recognition.

[0126] S27, the processing center compares the appearance quality information of the packaging bag surface actually obtained with the appearance quality standard of the packaging bag surface stored in the memory: if they are inconsistent, the information is transmitted to the alarm and a re-test is notified; if they are consistent, the information is transmitted to the wear resistance test unit;

[0127] Furthermore, the appearance quality standards of the packaging bag surface include that the surface should be flat, not deformed, not dirty, not wrinkled, not bubbled, not curled, and not folded; the pattern should be clear and complete, the color should be bright and full, without obvious color difference and deformation or distortion, uniform without showing the bottom, and the coloring should be soft and smooth; the text lines should be clear and complete, not deformed, not blurred, not burred, the lines should be straight and smooth, and the width should meet the design requirements; the edges should be neat, without burrs, residual oil, blur or incompleteness; the pattern size and its accuracy should meet the design requirements, and the allowable deviation of its length, width and thickness should be within the specified range; the color between different batches of the same type should be consistent.

[0128] S28, the wear-resistance test unit performs a wear-resistance test on the graphics and texts printed on the surface of the packaging bag with qualified appearance through the wear-resistance detection equipment to obtain the wear-resistance test data, and transmits it to the processing center;

[0129] Furthermore, the wear resistance test refers to testing whether the wear resistance of the printed surface graphics and text meets the predetermined requirements by rubbing the surface numerous times in a simulated environment. This can ensure that the packaging bag has no obvious wear or discoloration on the surface during long-term use by users, thereby ensuring the quality and life of the printing.

[0130] S29. The processing center compares the actual printed image wear test data with the wear test standard of the printed image on the packaging bag surface stored in the memory: if they are inconsistent, the alarm is transmitted to the alarm and the rework and re-test printing are notified; if they are consistent, it means that the test print is qualified and is set as the printing process parameter.

[0131] Furthermore, the wear resistance test standard refers to the fact that the pattern and / or text on the surface of the packaging bag after the wear resistance test has no obvious wear or fading.

[0132] S30, the printing drive module prints the required gravure pattern on the surface of the packaging bag through the printing device according to the predetermined printing parameters, and transmits it to the surface processing module;

[0133] Furthermore, the gravure image and text refer to the image obtained by gravure printing, that is, the prepared gravure plate is installed on the gravure printing machine, the predetermined parameters of the printing machine are adjusted, and the ink is evenly applied on the gravure plate with an ink roller, and the ink is transferred to the printing plate with the embossing roller on the printing machine, and then transferred to the surface of the packaging bag paper through the embossing roller to complete the gravure printing.

[0134] See also Fig. 9 As shown, before the step S30 of "printing the required gravure image on the surface of the packaging bag by a printing device", the following steps are also included:

[0135] S31, the substrate confirmation unit checks the surface quality of the substrate film to be printed through a scanner and confirms whether it meets the printing requirements, and transmits it to the equipment inspection unit;

[0136] Furthermore, the "inspection of the substrate film to be printed" includes confirming whether its surface is flat and has no obvious defects, and whether the thickness error, elongation and surface tension are up to standard; the "confirmation of whether the substrate film to be printed meets the printing requirements" includes: ① The surface is smooth and flat, without obvious stiff blocks, yellow and black spots, holes, and excessive wrinkles; ② The average thickness error of the substrate film to be printed should be within 10% (when the printing width is 1m); ③ Under printing tension, the elongation of the substrate film to be printed should be within 1%; ④ The surface tension of the substrate film to be printed should be ≥40dyn / cm; ⑤ For films that are easily dissolved and swelled with solvents in printing inks, the printing speed and ink concentration can be larger.

[0137] S32, the equipment inspection unit uses a high-definition camera to obtain information about whether there are no foreign objects around the printing press and its supporting equipment, and confirms whether the plate rollers, operation, lubrication, oil circuits, and instruments are normal, and transmits this information to the gravure plate confirmation unit;

[0138] Furthermore, the "whether there are no foreign objects around the equipment" includes whether there are dust, garbage and sundries not related to printing around the printing machine, and whether the ventilation and exhaust facilities are intact; the "whether the plate roller is normal" includes that the plate roller of the next color should be slightly larger than the previous color, such as: the circumference of the second color plate roller should be 1% larger than the circumference of the first color plate roller, at least slightly larger or equal, and absolutely not smaller than the first color, otherwise it cannot be overprinted correctly, and whether the plate roller pattern and color mark are correct; the "whether the operation, lubrication, oil circuit, and instrumentation are normal" includes whether there are blockages in the transmission, feeding, feeding, drying, inking, traction and winding parts of the printing machine, whether lubricating oil is injected into the lubrication part, whether the oil circuit is unobstructed, and whether the instruments are intact, such as: if there is an automatic ink viscosity controller, the viscosity of the ink should be adjusted to the set value of 14-18 seconds, and a mixed solvent should be poured into it (the upper part), connected to the ink tank with an ink pump, and the computer automatic plate registration device should be checked. All equipment should be idling for several times before printing to find out if there are any abnormalities, and a comprehensive automatic check should be carried out.

[0139] S33, the gravure plate confirmation unit uses an intelligent sensor to confirm whether the engraved gravure plate is firmly installed and whether the tightness of the plate roller is appropriate, and transmits it to the ink knife inspection unit;

[0140] Furthermore, the "whether it is installed firmly and whether the tightness of the fit with the plate roller is appropriate" includes whether the clamping cones on the left and right sides of the gravure plate are too tight to avoid the plate roller from bursting. If it is too loose, the plate will "escape" during printing. The plate roller is installed according to the printing color sequence. The printing color sequence for inside printing is "gold and silver ink → black ink → original cyan → original yellow → original red (magenta plate) → white plate", and the color sequence for positive printing is "white ink → magenta ink → yellow ink → cyan ink → black ink → gold and silver ink", which are just the opposite.

[0141] S34, the ink blade inspection unit obtains whether the angle between the ink blade and the tangent line of the contact point of the printing roller is appropriate and whether the position of the ink blade and the hard blade lining is correct through the intelligent sensor, and transmits it to the acceleration test unit;

[0142] Furthermore, the "angle between the tangent of the contact point between the scraper and the printing roller is appropriate" includes that the thickness of the scraper is between 0.15-0.55mm, and the angle between the tangent of the contact point with the printing roller is between 15-45°. If it is less than 15°, the ink is not easy to scrape off. If it is greater than 45°, the damage to the printing plate and the scraper is relatively serious, and the chrome plating layer of the printing plate is easy to be scratched. The pressure of the scraper should not be too large. If it is too large, it is easy to damage the printing plate. If it is too small, it is difficult to scrape off the ink.

[0143] Furthermore, the "whether the positions of the scraper blade and the hard knife lining are correct" includes whether the scraper blade and the hard knife lining are overlapped and placed in the middle of the upper and lower clamping plates, whether the thickness of the hard knife lining is 0.8-1.8mm, whether the bolts are tightened, and whether the bolts are tightened symmetrically from the middle to the left and right ends to eliminate blade bending; the length of the scraper blade extending out of the hard knife lining is 10-20mm. If the extended length is too long, the scraper blade will be soft and difficult to scrape clean; if it is too short, the rigidity will increase, the scraping will be too large, and the blade and plate will be easily damaged.

[0144] S35, the acceleration test unit confirms whether the control of the printing press speed by the continuously variable speed system is normal through the acceleration sensor, so as to ensure the accuracy of the printing speed during printing and the quality of graphic printing.

[0145] Furthermore, the "confirmation of whether the control of the printing press speed by the continuously variable transmission system is normal" includes, in order to synchronize the printing units of each color, using a continuously variable transmission system consisting of a main motor and a continuously variable transmission to drive the printing control system to drive the running speed of the printing press through a long rotating shaft to control the printing speed, specifically: starting the main motor to check the speed change of the transmission when the clutches of the printing plates of each color are disengaged, then turning on the dryer and the blower, closing the clutch at a low speed to perform color registration, first taking the first color as a reference, starting the inching to perform the longitudinal color registration of the second, third and fourth colors; then still taking the first color as a reference, performing the transverse color registration of the second, third and fourth colors, and fine-tuning the transverse color registration with a hand wheel, and when the longitudinal and transverse color registration is aligned, the printing speed is accelerated.

[0146] S40, the surface treatment module dries, laminates, cuts, glazes, and folds the gravure images on the surface of the finished packaging bag to ensure the image clarity and customer requirements, and transmits it to the image acquisition module;

[0147] See also Fig.10 As shown, the step S40 includes the following steps:

[0148] S41, the drying processing unit dries the gravure pattern on the surface of the finished packaging bag through a drying device and removes surface abnormalities to remove surface moisture to ensure the dryness of the paper surface, and transfers it to the film softening unit;

[0149] Furthermore, the drying refers to the process of drying the ink on the surface of the printed packaging bag paper through a drying device for a certain period of time, and the length of time depends on the characteristics of the ink and the type of material. The drying time for each different ink is inconsistent, and the drying time for each different packaging bag paper is inconsistent; the surface abnormality removal refers to the treatment of the problems of blockage, adhesion, and burrs on the surface of the gravure image and text of the dried packaging bag to ensure the cleanliness of the image and text.

[0150] S42, the laminating and softening unit laminates and softens the surface of the dried packaging bag paper through the laminating equipment to increase its durability and foldability, and transfers it to the glazing and hot stamping unit;

[0151] Furthermore, the lamination refers to covering the surface of the printed packaging bag paper with a protective film to increase the durability and reputation of the graphics on the surface of the packaging bag paper, so that the printed graphics will not fall off for a long time, thereby extending the service life of the packaging bag; the softening refers to kneading the packaging bag paper to a certain extent through a softening device to facilitate subsequent folding and processing.

[0152] S43, the glazing and hot stamping unit performs glazing or hot stamping on the surface of the packaging bag paper after the film is softened, so as to make the surface of the plastic packaging bag more bright and beautiful, and transfers it to the cutting and folding unit;

[0153] Furthermore, the glazing refers to a post-printing treatment process in which a layer of colorless transparent coating is coated (or sprayed or printed) on the surface of the packaging bag paper, and a thin and uniform transparent glossy layer is formed on the surface of the packaging bag paper after leveling, drying, calendering and curing. This can enhance the smoothness of the surface of the packaging bag paper, protect the surface gloss, enhance the surface gloss, and does not affect the recycling and reuse of the paper; the hot stamping refers to a process of transferring the aluminum layer in the electrochemical aluminum to the surface of the substrate to form a special metal layer by using the principle of hot pressure transfer, so that the surface of the packaging bag is smooth and bright, and the grade of the packaging product is improved.

[0154] S44, the cutting and folding unit performs die-cutting, back gluing and folding processing on the glazed packaging bag paper to form a plastic packaging bag, which is ready for packaging and shipment.

[0155] Furthermore, the die-cutting refers to a forming process in which a die-cutting plate is combined into a die-cutting plate according to the pattern required by the product design by a die-cutting device, and the packaging bag paper is rolled into a desired shape or cut under the action of pressure applied by the device. The cut is also called indentation, which refers to using a creasing knife or a creasing die to press out a line mark on the sheet material under the action of pressure, or using a rolling wheel to roll out a line mark on the sheet material, so that the sheet material can be bent and formed according to a predetermined position; existing die-cutting equipment has a creasing function, and the die-cutting knife and the creasing knife are combined in the same template, so that die-cutting and indentation can be performed at the same time. The process of combining the two is also called molding; the back gluing refers to a process of applying adhesive to the back of the printed packaging bag paper surface, so that it can be bonded to other materials during subsequent folding; the folding refers to the process of folding the printed packaging bag paper into a bag of the packaging bag size through a folding device according to the page number sequence and the specified format size according to the three-dimensional drawing of the packaging bag, so as to finally form the plastic packaging bag required by the customer.

[0156] S50, the image acquisition module obtains the image information of the gravure image on the surface of the packaging bag through a high-definition camera and converts it into recognizable quality information of the gravure image on the surface of the packaging bag, and transmits it to the processing center;

[0157] Further explanation: the gravure image quality information on the packaging bag surface is consistent with the gravure image quality information on the packaging bag surface of the aforementioned trial printing, but the latter is the image quality information on the packaging bag paper surface before folding, while here is the image quality information on the surface after folding into a packaging bag. There are slight differences between the two. If it is not folded, it may be qualified, but due to abnormal surface treatment process after printing, the surface image quality after folding will be unqualified. The qualified rate before folding must be higher than the qualified rate after folding.

[0158] S60, the processing center compares the actually acquired gravure image quality information on the packaging bag surface with the image quality standard on the packaging bag surface stored in the memory: if they are inconsistent, the information is transmitted to the alarm and a rework and reprinting notification is given; if they are consistent, the printing is notified as qualified.

[0159] It is further explained that the quality standards of the graphics and text on the surface of the packaging bag include color matching, clear graphics and text, smooth paper surface, uniform lines, and no edge defects. There are some differences between the surface after folding into a packaging bag and the surface before folding into a packaging bag, including differences in flatness and glossiness.

[0160] The above steps are displayed in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise clearly stated in this document, there is no strict order restriction for the execution of these steps. These steps can also be executed in other orders, and some steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0161] Further explanation, the present invention is described according to the content implemented by the software program of the intelligent printing control system of the plastic packaging bag based on AI. Each intelligent printing control method of the plastic packaging bag based on AI is divided into several modules or units to implement the software program instructions generated by each step. The software program instructions include the intelligent printing control method of the plastic packaging bag based on AI described above. Most of the implementation of the above program is automated, of course, there are also a small number of actions that are semi-automated, and a very small part requires human assistance to complete.

[0162] The present invention provides an AI-based intelligent printing control system for plastic packaging bags, which also includes a computer-readable storage medium containing a memory; the memory stores a computer program, and when the functional modules execute the computer program, the steps of the above-mentioned AI-based intelligent printing control method for plastic packaging bags are implemented; the computer-readable storage medium stores a computer program, and when the computer program is executed by the functional modules, the steps of the above-mentioned AI-based intelligent printing control method for plastic packaging bags are implemented.

[0163] It is further explained that the computer program is divided into multiple modules / units, and the multiple modules / units are stored in the memory and executed by each module / unit to complete the present invention; the multiple modules / units can be a series of computer program instructions that can complete specific functions, and the instructions are used to describe the execution process of the computer program in each module / unit.

[0164] The present invention also provides an AI-based intelligent printing control device for plastic packaging bags, which is implemented by the above-mentioned AI-based intelligent printing control method for plastic packaging bags.

[0165] To further illustrate, the intelligent printing control device is composed of the above-mentioned related equipment or devices. According to the production needs of the enterprise, it can be made into a complete set of intelligent printing production lines, or it can be made into unit devices of various functional modules belonging to each step. The packaging bags and printing supporting materials required for production are connected and transmitted in segments through conveyor belts. These equipment structures are not described in detail here, and no structural restrictions are made. The above only describes the software automatic control function.

[0166] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application.

[0167] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application can be modified or replaced by equivalents, and all should be included in the scope of protection of the present application.

Claims

1. An AI-based intelligent printing control method for plastic packaging bags, characterized in that: An intelligent printing control system for plastic packaging bags based on AI includes a gravure production module, a parameter determination module, a printing drive module, a surface treatment module, an image acquisition module, a wireless communication module, a memory, an alarm, a processing center, and an intelligent mobile terminal; the gravure production module, the parameter determination module, the printing drive module, the surface treatment module, the image acquisition module, the memory, and the alarm are respectively connected to the processing center; the intelligent mobile terminal includes a smart phone, a tablet computer or an intelligent remote control, which are respectively connected to the wireless network of the wireless communication module within the range of a wireless network or the Internet; The wireless communication module is provided with a wireless network unit, which is responsible for sending and receiving wireless signals and automatically networking with the intelligent mobile terminal within the effective network range; The alarm compares the actually acquired printing plate image quality information with the printing plate appearance quality standard stored in the memory, and automatically sounds an alarm and notifies the rework to remake the printing plate if there is any inconsistency; and compares the actual printing plate wear and corrosion resistance test data with the printing plate wear and corrosion resistance standard stored in the memory, and automatically sounds an alarm and notifies the rework to remake the printing plate; and compares the actually acquired appearance quality information of the packaging bag surface with the appearance quality standard of the packaging bag surface stored in the memory, and automatically sounds an alarm and notifies the re-test printing if there is any inconsistency; and compares the actual printed image wear test data with the wear test standard of the printed image on the packaging bag surface stored in the memory, and automatically sounds an alarm and notifies the rework to re-test printing if there is any inconsistency; and compares the actually acquired gravure image quality information on the packaging bag surface with the image quality standard on the packaging bag surface stored in the memory, and automatically sounds an alarm and notifies the rework to re-print if there is any inconsistency; The memory is responsible for storing the information of the gravure production module, the parameter determination module, the printing drive module, the surface treatment module, the image acquisition module, the wireless communication module, and the alarm, as well as the printing plate appearance quality standard, the printing plate wear and corrosion resistance standard, the packaging bag surface appearance quality standard, the packaging bag surface graphics wear test standard, and the packaging bag surface graphics quality standard; The processing center is responsible for information transmission among the gravure production module, parameter determination module, printing drive module, surface treatment module, image acquisition module, wireless communication module, alarm, and memory. It is the hub center of the system and compares the image quality information of the printing plate actually obtained with the appearance quality standard of the printing plate stored in the memory: if they are inconsistent, the information is transmitted to the alarm and the printing plate is notified to be reworked and remade; if they are consistent, the wear and corrosion resistance test is performed; and the wear and corrosion resistance test data of the actual printing plate is compared with the wear and corrosion resistance standard of the printing plate stored in the memory: if they are inconsistent, the information is transmitted to the alarm and the printing plate is notified to be reworked and remade; if they are consistent, it is proved that the printing plate is qualified and can be used for packaging bag printing; and the appearance quality information of the packaging bag surface actually obtained is compared with the appearance quality standard of the packaging bag surface stored in the memory: if they are inconsistent, the information is transmitted to the alarm and the trial printing is notified; if they are consistent, the information is transmitted to the wear resistance test unit; and the wear resistance test data of the actual printed graphics are compared with the wear resistance test standard of the graphics printed on the surface of the packaging bag stored in the memory: if they are inconsistent, the information is transmitted to the alarm and the trial printing is notified to be reworked and remade; if they are consistent, it indicates that the trial printing is qualified and is set as the printing process parameter; The actual obtained gravure image quality information on the packaging bag surface is compared with the image quality standard on the packaging bag surface stored in the memory: if they are inconsistent, the alarm is transmitted to the alarm and the rework and reprinting are notified; if they are consistent, the printing is notified to be qualified; The gravure production module includes a graphic design unit, a digital plate making unit, and a wear-resistant and corrosion-resistant unit. According to the requirements of the target packaging bag, the required gravure printing plate is produced by mechanical engraving and transmitted to the parameter determination module. The parameter determination module includes a pressure calculation unit, a speed calculation unit, a parameter optimization unit, a pigment mixing unit, and an abrasion resistance test unit. According to the graphic requirements of the packaging bag to be printed, the module is connected to the industry database to obtain the best industry-related printing parameters for trial printing to determine the final printing parameters, and transmits them to the printing drive module. The printing drive module includes a substrate confirmation unit, an equipment inspection unit, an intaglio confirmation unit, an ink knife inspection unit, and an acceleration test unit. According to predetermined printing parameters, the intaglio image and text on the surface of the packaging bag are printed by the printing equipment and transmitted to the surface treatment module. The surface treatment module includes a drying unit, a film-coating and softening unit, a glazing and hot stamping unit, and a cutting and folding unit, which are responsible for drying, laminating, cutting, glazing, and folding the gravure images and texts on the surface of the finished packaging bag to ensure the clarity of the images and texts and meet customer requirements, and transmit them to the image acquisition module; The image acquisition module obtains the image of the gravure printing plate and the image of the gravure text on the surface of the packaging bag through a high-definition camera, converts them into recognizable quality information of the printing plate image and the gravure text quality information on the surface of the packaging bag, and transmits them to the processing center; The intelligent printing control method comprises the following steps: S10, before printing, the gravure production module produces the required gravure printing plate by mechanical engraving according to the requirements of the target packaging bag, and transmits it to the parameter determination module; S20, the parameter determination module obtains the best industry-related printing parameters based on the graphic requirements of the packaging bag to be printed and is connected to the industry database for trial printing to determine the final printing parameters, and transmits them to the printing driver module; S30, the printing drive module prints the required gravure pattern on the surface of the packaging bag through the printing device according to the predetermined printing parameters, and transmits it to the surface processing module; S40, the surface treatment module dries, laminates, cuts, glazes, and folds the gravure images on the surface of the finished packaging bag to ensure the image clarity and customer requirements, and transmits it to the image acquisition module; S50, the image acquisition module obtains the image information of the gravure image on the surface of the packaging bag through a high-definition camera and converts it into recognizable quality information of the gravure image on the surface of the packaging bag, and transmits it to the processing center; S60, the processing center compares the actually acquired gravure image quality information on the packaging bag surface with the image quality standard on the packaging bag surface stored in the memory: if they are inconsistent, the information is transmitted to the alarm and the rework and reprinting are notified; if they are consistent, the image printing on the packaging bag surface is qualified; The step S10 comprises the following steps: S11, the graphic design unit obtains the image information of the graphic pattern to be printed through scanning software and converts it into three-dimensional image information, and transmits it to the digital plate making unit; S12, the digital plate making unit makes a printing plate required for gravure printing through a digital printing device according to the three-dimensional image information, and transmits it to the image acquisition module; S13, the image acquisition module obtains the image of the gravure printing plate through a high-definition camera and converts it into recognizable plate image quality information, and transmits it to the processing center; S14, the processing center compares the actually acquired printing plate image quality information with the printing plate appearance quality standard stored in the memory: if they are inconsistent, the information is transmitted to the alarm and the printing plate is notified to be reworked and remade; if they are consistent, the wear and corrosion resistance test is carried out; S15. The wear-resistance and corrosion-resistance unit performs wear-resistance and corrosion-resistance tests on the printing plates with qualified appearance surfaces through wear-resistance and corrosion-resistance testing equipment to obtain wear-resistance and corrosion-resistance test data, and transmits it to the processing center; S16. The processing center compares the wear and corrosion resistance test data of the actual printing plate with the wear and corrosion resistance standard of the printing plate stored in the memory: if they are inconsistent, the alarm is transmitted to the alarm and the printing plate is notified to be reworked and remade; if they are consistent, the printing plate is proved to be qualified and can be used for packaging bag printing; The step S20 comprises the following steps: S21, the pressure calculation unit obtains the printing pressure according to the printing pressure calculation formula "P = (K*F*D) / L, P is the pressure (N), K is the K value coefficient, F is the pressure between the roller end faces (KPa), D is the roller diameter (mm), and L is the roller length (mm)", and transmits it to the speed calculation unit; S22, speed calculation unit according to the printing speed calculation formula "υ2=(S*n*υ1] / 10000, υ2 is the printing speed (sheets / h), S is the paper area size (cm 2 ), n is the printing coefficient (1 / cm 2 ),υ1 is the printing press speed (sheets / h)” to obtain the required printing speed and pass it to the parameter optimization unit; S23, the parameter optimization unit obtains matching and optimization of similar printing parameters in the industry according to the calculated printing pressure and printing speed and the industry database, selects the best industry parameters as the predetermined printing parameters, and transmits them to the pigment mixing unit; S24, the pigment mixing unit mixes various colors into target color inks in proportion accurately according to the color standard required by the customer to achieve the required printing effect, and transmits it to the trial printing control unit; S25, the trial printing control unit performs trial gravure printing on the surface of the packaging bag through a printing machine according to predetermined printing parameters to confirm the optimization of the printing effect, and transmits the result to the image acquisition module; S26, the image acquisition module obtains the image quality information of the surface of the packaging bag after the trial printing through the set high-definition camera, and transmits it to the processing center; S27, the processing center compares the appearance quality information of the packaging bag surface actually obtained with the appearance quality standard of the packaging bag surface stored in the memory: if they are inconsistent, the information is transmitted to the alarm and a re-test is notified; if they are consistent, the information is transmitted to the wear resistance test unit; S28, the wear-resistance test unit performs a wear-resistance test on the graphics and texts printed on the surface of the packaging bag with qualified appearance through the wear-resistance detection equipment to obtain the wear-resistance test data, and transmits it to the processing center; S29, the processing center compares the actual printed image wear test data with the wear test standard of the printed image on the packaging bag surface stored in the memory: if they are inconsistent, the alarm is transmitted to the alarm and the rework and re-test printing are notified; if they are consistent, it means that the test printing is qualified and is set as the printing process parameter; Before the step S30 of "printing the required gravure pattern on the surface of the packaging bag by a printing device", the following steps are also included: S31, the substrate confirmation unit checks the surface quality of the substrate film to be printed through a scanner and confirms whether it meets the printing requirements, and transmits it to the equipment inspection unit; S32, the equipment inspection unit uses a high-definition camera to obtain information about whether there are no foreign objects around the printing press and its supporting equipment, and confirms whether the plate rollers, operation, lubrication, oil circuits, and instruments are normal, and transmits this information to the gravure plate confirmation unit; S33, the gravure plate confirmation unit uses an intelligent sensor to confirm whether the engraved gravure plate is firmly installed and whether the tightness of the plate roller is appropriate, and transmits it to the ink knife inspection unit; S34, the ink blade inspection unit obtains whether the angle between the ink blade and the tangent line of the contact point of the printing roller is appropriate and whether the position of the ink blade and the hard blade lining is correct through the intelligent sensor, and transmits it to the acceleration test unit; S35, the acceleration test unit confirms whether the control of the printing machine speed by the continuously variable speed system is normal through the acceleration sensor, so as to ensure the accuracy of the printing speed during printing and the quality of the graphic printing; The step S40 comprises the following steps: S41, the drying processing unit dries the gravure pattern on the surface of the finished packaging bag through a drying device and removes surface abnormalities to remove surface moisture to ensure the dryness of the paper surface, and transfers it to the film softening unit; S42, the laminating and softening unit laminates and softens the surface of the dried packaging bag paper through the laminating equipment to increase its durability and foldability, and transfers it to the glazing and hot stamping unit; S43, the glazing and hot stamping unit performs glazing or hot stamping on the surface of the packaging bag paper after the film is softened, so as to make the surface of the plastic packaging bag more bright and beautiful, and transfers it to the cutting and folding unit; S44, the cutting and folding unit performs die-cutting, back gluing and folding processing on the glazed packaging bag paper to form a plastic packaging bag, which is ready for packaging and shipment.

2. The AI-based intelligent printing control method for plastic packaging bags according to claim 1, characterized in that: The intelligent printing control system also includes a computer-readable storage medium containing a memory; the memory stores a computer program, and when the functional modules execute the computer program, the steps of the intelligent printing control method for plastic packaging bags based on AI as described in any one of claim 1 above are implemented; the computer-readable storage medium stores a computer program, and when the computer program is executed by the functional modules, the steps of the intelligent printing control method for plastic packaging bags based on AI as described in any one of claim 1 above are implemented.

3. An AI-based intelligent printing control device for plastic packaging bags, characterized in that: This is achieved by using the AI-based intelligent printing control method for plastic packaging bags described in claims 1-2 above.

Images