A label full-automatic screen printing method based on CCD vision alignment

Abstract

This invention discloses a fully automated screen printing method for labels based on CCD visual alignment, specifically including the following steps: material feeding control, substrate pretreatment, CCD visual alignment, dual CCD compensation printing, continuous alignment and overprinting, low-temperature curing, cooling, shaping and leveling, CCD visual final inspection, slitting and rewinding, and packaging output. This fully automated screen printing method for labels based on CCD visual alignment achieves precise alignment and real-time offset compensation between the screen and the substrate through dual CCD visual monitoring, improving overprinting accuracy. It employs ambient pressure low-temperature plasma pretreatment to enhance substrate adhesion, and three-stage low-temperature curing to prevent PET substrate deformation. Combined with full-width CCD final inspection to automatically remove defective products, this method achieves fully automated, high-precision, and high-stability label printing production, offering advantages such as precise alignment, uniform curing, strict quality control, and high production efficiency.

Description

Technical Field

[0001] This invention relates to the field of label screen printing technology, and in particular to a fully automated label screen printing method based on CCD visual alignment. Background Technology

[0002] Screen printing of labels is a core process for printing text and images on labels and attaching anti-counterfeiting labels. It is widely used in electronics, packaging, anti-counterfeiting labeling and other fields. With the continuous development of technology, people's requirements for fully automated screen printing methods for labels are also getting higher and higher.

[0003] Existing fully automated screen printing methods for labels have certain drawbacks. Traditional PET label screen printing often uses manual alignment or mechanical positioning, resulting in low alignment accuracy, large registration deviations, and poor printing consistency. Some equipment uses single-vision monitoring, making it difficult to achieve real-time offset compensation between the screen and the substrate, leading to defects such as ghosting, missing prints, and blurred edges during multi-color printing. Furthermore, traditional curing processes involve high temperatures and high energy consumption, easily causing thermal deformation of the PET substrate, affecting label dimensional stability and finished product yield. The lack of end-to-end online inspection also increases the risk of defective products leaving the site, failing to meet the demands for high-precision, high-efficiency, and high-stability automated printing production. Therefore, this invention proposes a fully automated screen printing method for labels based on CCD vision alignment. Summary of the Invention

[0004] Technical problem solved: In view of the shortcomings of the existing technology, the present invention provides a fully automatic screen printing method for labels based on CCD vision alignment, which has the advantages of high alignment accuracy, stable registration, uniform curing, and full-process quality inspection. It can effectively solve the problems of large positioning deviation, inaccurate registration, easy deformation of substrate and low yield in traditional printing processes, and significantly improve label printing quality and production efficiency.

[0005] Technical Solution: To achieve the above objectives, the technical solution adopted by this invention is: a fully automated screen printing method for labels based on CCD visual alignment, specifically including the following operational steps: S1: Feeding control: Load the PET roll label substrate into the automatic unwinding machine, set the tension parameters through the tension control mechanism to ensure that the unwinding and feeding are not loose, and set photoelectric correction and CCD correction to ensure that the feeding path does not deviate and smoothly transport the label substrate to the pre-processing station. S2: Substrate pretreatment: The printing surface of the PET substrate is treated online in all directions using a low-temperature plasma head under normal pressure. The uniformity of the treatment is monitored in real time by a CCD camera. If a local untreated area is detected, the position and power of the plasma head are automatically adjusted to ensure that the treatment meets all standards. S3: CCD Vision Alignment: The processed label is transported to the designated printing position. Before printing, the label is accurately aligned by CCD and the position information is input into the image processing software. The position data is processed and calculated, and the relative offset between the screen and the substrate is automatically calculated. The compensation value is written into the motion controller to complete the alignment parameter calibration. S4: Dual CCD Compensation Printing: The upper CCD captures the actual position of the screen opening, the lower CCD captures the substrate positioning mark, calculates the real-time offset, the ink return knife automatically pre-lays anti-counterfeiting ink, the squeegee scrapes at constant pressure and speed, and the dual CCD monitors and compensates in real time. S5: Continuous alignment and overprinting: After the first color printing is completed, the substrate smoothly enters the next color group through the conveying mechanism. Each color group is independently equipped with a CCD alignment unit to continuously print multi-color labels. S6: Low-temperature curing: A combination of UV light and constant-temperature hot air is used for deep curing. The UV section uses low-energy UV lamps to initially shape the ink layer, while the hot air section uses three-stage temperature control to gradually complete the deep curing of the ink layer. S7: Cooling, Shaping and Leveling: A combination of natural air cooling and roller leveling is used to reduce the temperature of the cured PET label to room temperature to ensure that the ink layer is completely set; S8: CCD visual final inspection: A high-resolution linear CCD camera is used to inspect the entire label area and automatically input the data into the image processing system to analyze the printed products and remove defective products. S9: Slitting and winding: The labels that pass the final inspection are transported to the winding station. The tension parameters are set by the tension control mechanism to ensure that the winding is not loose. When the winding length reaches the preset value, the equipment automatically slits and fixes the labels. S10: Packaging Output: Place the finished label into the designated packaging and attach a QR code for quality traceability to the top, outputting the final product.

[0006] As a preferred technical solution of this application, a feeding control module is set in step S1. The feeding control module includes an unwinding control unit, a tension control unit, a photoelectric correction unit, a CCD correction unit, and a preheating control unit. The preheating temperature is controlled at 30-40℃.

[0007] As a preferred technical solution of this application, a CCD visual alignment module is set in step S3. The CCD visual alignment module includes a dual CCD visual monitoring unit, an alignment calibration monitoring unit, an antenna, an alignment calibration processing unit, a computer and a remote control terminal. The alignment calibration processing unit includes a data analysis unit, a data acquisition and management unit and a database.

[0008] As a preferred technical solution of this application, a low-temperature curing control module is set in step S6. The low-temperature curing control module includes a UV curing control unit, a hot air curing control unit, a temperature adjustment unit, an infrared temperature measurement unit, and a speed synchronization control unit. The UV light intensity is 300-500mJ / cm², the hot air three-stage temperature control is 40-50℃, 50-60℃, and 60-70℃ respectively, and the infrared temperature measurement accuracy is ±1℃.

[0009] As a preferred technical solution of this application, the S4 step is equipped with a dual CCD compensation printing module, the dual CCD real-time offset compensation response time is ≤0.1s, the compensation range is ±0.5mm; the squeegee pressure is 0.3-0.5MPa, the squeegee speed is 8-12m / min, it is compatible with multiple specifications of screens and substrates, and the printing position is accurate and without deviation.

[0010] As a preferred technical solution of this application, the S8 step is to set a CCD vision final inspection module, with a linear CCD camera resolution ≥1200dpi, defect detection accuracy ≥0.05mm, and inspection speed matching production speed.

[0011] As a preferred technical solution of this application, the S7 step is to set a cooling and shaping leveling module, with a roller pressing and leveling pressure of 0.1-0.2MPa, and natural air cooling to room temperature, so that the label surface is flat and wrinkle-free and the size is not deformed.

[0012] As a preferred technical solution of this application, the S9 step is to set a slitting and winding control module, with a winding tension parameter of 60-100N and a winding length preset to 500-1000m.

[0013] Beneficial effects: Compared with the prior art, the present invention provides a fully automatic screen printing method for labels based on CCD visual alignment, which has the following beneficial effects: This fully automatic screen printing method for labels based on CCD visual alignment achieves precise alignment and real-time offset compensation between the screen and the substrate through dual CCD visual monitoring, thereby improving the registration accuracy. It adopts normal pressure low temperature plasma pretreatment to enhance the adhesion of the substrate, and three-stage low temperature curing to avoid deformation of the PET substrate. Combined with full-width CCD final inspection to automatically reject unqualified products, it realizes fully automated, high-precision and high-stability production of label printing. Employing dual CCD visual alignment and real-time compensation technology, the alignment accuracy reaches ±0.01mm, and the multi-color overprint accuracy is ±0.02mm, fundamentally solving the problems of misregistration and pattern offset, and significantly improving printing accuracy. The combination of atmospheric pressure low-temperature plasma pretreatment and three-stage low-temperature curing not only improves ink adhesion but also avoids thermal deformation of the PET substrate, ensuring label dimensional stability and ink layer adhesion. Full-process CCD monitoring + final inspection with full-width detection enables closed-loop control of the production process, automatically rejecting defective products and increasing the finished product qualification rate to over 99%. The entire process is automated, integrating feeding, printing, curing, testing, and rewinding, reducing manual intervention and increasing production efficiency by more than 30%. It is suitable for large-volume, high-precision label printing production. The fully automated label screen printing method has a simple structure, is easy to operate, and achieves better results than traditional methods. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a fully automated screen printing method for labels based on CCD visual alignment according to the present invention.

[0015] Figure 2 This is a schematic diagram of the feeding control module in a fully automatic screen printing method for labels based on CCD vision alignment according to the present invention.

[0016] Figure 3 This is a schematic diagram of the CCD vision alignment module in the fully automated screen printing method for labels based on CCD vision alignment of the present invention.

[0017] Figure 4 This is a schematic diagram of the low-temperature curing control module in a fully automated screen printing method for labels based on CCD vision alignment according to the present invention. Detailed Implementation

[0018] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the embodiments described below are some embodiments of the present invention, but not all embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0019] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] like Figure 1-4 As shown, a fully automated screen printing method for labels based on CCD visual alignment includes the following steps: S1: Feeding control: Load the PET roll label substrate into the automatic unwinding machine, set the tension parameters through the tension control mechanism to ensure that the unwinding and feeding are not loose, and set photoelectric correction and CCD correction to ensure that the feeding path does not deviate and smoothly transport the label substrate to the pre-processing station. S2: Substrate pretreatment: The printing surface of the PET substrate is treated online in all directions using a low-temperature plasma head under normal pressure. The uniformity of the treatment is monitored in real time by a CCD camera. If a local untreated area is detected, the position and power of the plasma head are automatically adjusted to ensure that the treatment meets all standards. S3: CCD Vision Alignment: The processed label is transported to the designated printing position. Before printing, the label is accurately aligned by CCD and the position information is input into the image processing software. The position data is processed and calculated, and the relative offset between the screen and the substrate is automatically calculated. The compensation value is written into the motion controller to complete the alignment parameter calibration. S4: Dual CCD Compensation Printing: The upper CCD captures the actual position of the screen opening, the lower CCD captures the substrate positioning mark, calculates the real-time offset, the ink return knife automatically pre-lays anti-counterfeiting ink, the squeegee scrapes at constant pressure and speed, and the dual CCD monitors and compensates in real time. S5: Continuous alignment and overprinting: After the first color printing is completed, the substrate smoothly enters the next color group through the conveying mechanism. Each color group is independently equipped with a CCD alignment unit to continuously print multi-color labels. S6: Low-temperature curing: A combination of UV light and constant-temperature hot air is used for deep curing. The UV section uses low-energy UV lamps to initially shape the ink layer, while the hot air section uses three-stage temperature control to gradually complete the deep curing of the ink layer. S7: Cooling, Shaping and Leveling: A combination of natural air cooling and roller leveling is used to reduce the temperature of the cured PET label to room temperature to ensure that the ink layer is completely set; S8: CCD visual final inspection: A high-resolution linear CCD camera is used to inspect the entire label area and automatically input the data into the image processing system to analyze the printed products and remove defective products. S9: Slitting and winding: The labels that pass the final inspection are transported to the winding station. The tension parameters are set by the tension control mechanism to ensure that the winding is not loose. When the winding length reaches the preset value, the equipment automatically slits and fixes the labels. S10: Packaging Output: Place the finished label into the designated packaging and attach a QR code for quality traceability to the top, outputting the final product.

[0022] In step S1, a feeding control module is set up. The feeding control module includes an unwinding control unit, a tension control unit, a photoelectric correction unit, a CCD correction unit, and a preheating control unit. The preheating temperature is controlled at 30-40℃.

[0023] In step S3, a CCD vision alignment module is set up. The CCD vision alignment module includes a dual CCD vision monitoring unit, an alignment calibration monitoring unit, an antenna, an alignment calibration processing unit, a computer, and a remote control terminal. The alignment calibration processing unit includes a data analysis unit, a data acquisition and management unit, and a database.

[0024] In step S6, a low-temperature curing control module is set up. The low-temperature curing control module includes a UV curing control unit, a hot air curing control unit, a temperature adjustment unit, an infrared temperature measurement unit, and a speed synchronization control unit. The UV light intensity is 300-500mJ / cm², the hot air three-stage temperature control is 40-50℃, 50-60℃, and 60-70℃ respectively, and the infrared temperature measurement accuracy is ±1℃.

[0025] In step S4, a dual CCD compensation printing module is set up. The real-time offset compensation response time of the dual CCD is ≤0.1s, and the compensation range is ±0.5mm. The squeegee pressure is 0.3-0.5MPa, the squeegee speed is 8-12m / min, and it is compatible with multiple specifications of screens and substrates, ensuring accurate and deviation-free printing position.

[0026] In step S8, a CCD vision final inspection module is set up with a linear CCD camera resolution ≥1200dpi, defect detection accuracy ≥0.05mm, and inspection speed matching production speed.

[0027] In step S7, a cooling, shaping, and leveling module is set up. The roller pressing and leveling pressure is 0.1-0.2MPa, and the label is naturally cooled to room temperature. The label surface is flat and wrinkle-free, and the dimensions are not deformed.

[0028] In step S9, the slitting and winding control module is set with a winding tension parameter of 60-100N and a winding length preset to 500-1000m. Example

[0029] A fully automated screen printing method for labels based on CCD visual alignment, the specific steps of which are as follows: S1: Feeding control: Load the 300mm wide PET roll label substrate into the automatic unwinding machine, set the tension control mechanism parameter to 100N, turn on photoelectric correction and CCD correction, correction accuracy ±0.02mm, and smoothly convey it to the pre-processing station. S2: Substrate pretreatment: 1000W power of low-temperature plasma head at normal pressure, 20m / min substrate conveying speed, CCD real-time monitoring of processing uniformity, automatic adjustment of plasma head parameters to ensure comprehensive processing; S3: CCD visual alignment: CCD alignment accuracy ±0.01mm, calculate the offset between the screen and the substrate, and write the compensation value into the motion controller to complete the calibration; S4: Dual CCD Compensation Printing: The upper CCD grasps the screen position, and the lower CCD grasps the substrate mark. The offset compensation response time is 0.08s, the squeegee pressure is 0.4MPa, the squeegee speed is 10m / min, and the compensation is monitored in real time. S5: Continuous registration and overprinting: Each of the three-color printing stations is equipped with an independent CCD registration unit, with an overprinting accuracy of ±0.02mm, completing multi-color overprinting; S6: Low-temperature curing: UV light intensity of 400mJ / cm² for initial shaping, hot air three-stage temperature control of 45℃, 55℃ and 65℃ respectively for deep curing of ink layer; S7: Cooling, shaping and leveling: Roller pressure 0.15MPa, natural air cooling to room temperature, label surface leveling; S8: CCD visual final inspection: Linear CCD resolution of 1200dpi, full-frame defect detection, automatic rejection of unqualified products; S9: Slitting and winding: Automatic slitting and fixing when the winding tension is 80N and the winding length is 800m; S10: Packaging Output: Affix a traceability QR code and package the finished product.

[0030] Testing showed that the label printing registration accuracy of this embodiment was ±0.015mm, the ink layer adhesion level was 1, with no peeling or deformation, and the finished product qualification rate was 99.2%. Example

[0031] A fully automated screen printing method for labels based on CCD visual alignment, the specific steps of which are as follows: S1: Feeding control: Load the 200mm wide PET roll label substrate into the automatic unwinding machine, set the tension control mechanism parameter to 80N, turn on photoelectric correction and CCD correction, and the correction accuracy is ±0.02mm. S2: Substrate pretreatment: ambient pressure low temperature plasma head power 800W, substrate conveying speed 15m / min; S3: CCD visual alignment: CCD alignment accuracy ±0.01mm, completing alignment parameter calibration; S4: Dual CCD compensated printing: squeegee pressure 0.3MPa, squeegee speed 8m / min, real-time offset compensation; S5: Continuous alignment and overprinting: Independent CCD alignment at two-color printing stations, with an overprinting accuracy of ±0.02mm; S6: Low temperature curing: UV light intensity 300mJ / cm², hot air three-stage temperature control 40℃, 50℃, 60℃ respectively; S7: Cooling, shaping, and leveling: Roller pressure 0.1MPa, air-cooled to room temperature; S8: CCD visual final inspection: full-width inspection, automatically rejecting defective products; S9: Slitting and winding: Automatic slitting with a winding tension of 60N and a winding length of 500m; S10: Packaging Output: Labeling and Packaging Output.

[0032] Testing showed that the labels printed in this embodiment had clear edges, no ghosting, and met dimensional stability standards. The production speed of 15m / min met the requirements for small-batch, high-precision printing. Example

[0033] A fully automated screen printing method for labels based on CCD visual alignment, the specific steps of which are as follows: S1: Feeding control: Load the 400mm wide PET roll label substrate into the automatic unwinding machine, set the tension control mechanism parameter to 120N, and turn on photoelectric correction and CCD correction. S2: Substrate pretreatment: ambient pressure low temperature plasma head power 1200W, substrate conveying speed 25m / min; S3: CCD visual alignment: precise alignment and writing of compensation parameters; S4: Dual CCD compensation printing: squeegee pressure 0.5MPa, squeegee speed 12m / min, dual CCD real-time compensation; S5: Continuous alignment and overprinting: Independent CCD alignment at four-color printing stations, overprinting accuracy ±0.02mm; S6: Low temperature curing: UV light intensity 500mJ / cm², hot air three-stage temperature control 50℃, 60℃, 70℃ respectively; S7: Cooling, shaping, and leveling: Roller pressure 0.2MPa, leveling and shaping; S8: CCD visual final inspection: High-resolution CCD full inspection, 100% defect rejection rate; S9: Slitting and winding: winding tension 100N, winding length 1000m automatic slitting; S10: Packaging Output: Packaged and output finished products.

[0034] Testing has shown that this embodiment is suitable for high-speed printing of wide-format labels, with high production efficiency and a finished product qualification rate of 99.5%, making it suitable for mass industrial production.

[0035] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A fully automated screen printing method for labels based on CCD visual alignment, characterized in that: Specifically, the following steps are included: S1: Feeding control: Load the PET roll label substrate into the automatic unwinding machine, set the tension parameters through the tension control mechanism to ensure that the unwinding and feeding are not loose, and set photoelectric correction and CCD correction to ensure that the feeding path does not deviate and smoothly transport the label substrate to the pre-processing station. S2: Substrate pretreatment: The printing surface of the PET substrate is treated online in all directions using a low-temperature plasma head under normal pressure. The uniformity of the treatment is monitored in real time by a CCD camera. If a local untreated area is detected, the position and power of the plasma head are automatically adjusted to ensure that the treatment meets all standards. S3: CCD Vision Alignment: The processed label is transported to the designated printing position. Before printing, the label is accurately aligned by CCD and the position information is input into the image processing software. The position data is processed and calculated, and the relative offset between the screen and the substrate is automatically calculated. The compensation value is written into the motion controller to complete the alignment parameter calibration. S4: Dual CCD Compensation Printing: The upper CCD captures the actual position of the screen opening, the lower CCD captures the substrate positioning mark, calculates the real-time offset, the ink return knife automatically pre-lays anti-counterfeiting ink, the squeegee scrapes at constant pressure and speed, and the dual CCD monitors and compensates in real time. S5: Continuous alignment and overprinting: After the first color printing is completed, the substrate smoothly enters the next color group through the conveying mechanism. Each color group is independently equipped with a CCD alignment unit to continuously print multi-color labels. S6: Low-temperature curing: A combination of UV light and constant-temperature hot air is used for deep curing. The UV section uses low-energy UV lamps to initially shape the ink layer, while the hot air section uses three-stage temperature control to gradually complete the deep curing of the ink layer. S7: Cooling, Shaping and Leveling: A combination of natural air cooling and roller leveling is used to reduce the temperature of the cured PET label to room temperature to ensure that the ink layer is completely set; S8: CCD visual final inspection: A high-resolution linear CCD camera is used to inspect the entire label area and automatically input the data into the image processing system to analyze the printed products and remove defective products. S9: Slitting and winding: The labels that pass the final inspection are transported to the winding station. The tension parameters are set by the tension control mechanism to ensure that the winding is not loose. When the winding length reaches the preset value, the equipment automatically slits and fixes the labels. S10: Packaging Output: Place the finished label into the designated packaging and attach a QR code for quality traceability to the top, outputting the final product.

2. The fully automated screen printing method for labels based on CCD visual alignment according to claim 1, characterized in that: In step S1, a feeding control module is set up. The feeding control module includes an unwinding control unit, a tension control unit, a photoelectric correction unit, a CCD correction unit, and a preheating control unit. The preheating temperature is controlled at 30-40℃.

3. The fully automated screen printing method for labels based on CCD visual alignment according to claim 1, characterized in that: In step S3, a CCD vision alignment module is set up. The CCD vision alignment module includes a dual CCD vision monitoring unit, an alignment calibration monitoring unit, an antenna, an alignment calibration processing unit, a computer, and a remote control terminal. The alignment calibration processing unit includes a data analysis unit, a data acquisition and management unit, and a database.

4. The fully automated screen printing method for labels based on CCD visual alignment according to claim 1, characterized in that: In step S6, a low-temperature curing control module is set up. The low-temperature curing control module includes a UV curing control unit, a hot air curing control unit, a temperature adjustment unit, an infrared temperature measurement unit, and a speed synchronization control unit. The UV light intensity is 300-500mJ / cm², the hot air three-stage temperature control is 40-50℃, 50-60℃, and 60-70℃ respectively, and the infrared temperature measurement accuracy is ±1℃.

5. The fully automated screen printing method for labels based on CCD visual alignment according to claim 1, characterized in that: In step S4, a dual CCD compensation printing module is set up. The real-time offset compensation response time of the dual CCD is ≤0.1s, and the compensation range is ±0.5mm. The squeegee pressure is 0.3-0.5MPa, the squeegee speed is 8-12m / min, and it is compatible with multiple specifications of screens and substrates, ensuring accurate and deviation-free printing position.

6. The fully automated screen printing method for labels based on CCD visual alignment according to claim 1, characterized in that: In step S8, a CCD vision final inspection module is set up, with a linear CCD camera resolution ≥1200dpi, defect detection accuracy ≥0.05mm, and inspection speed matching production speed.

7. The fully automated screen printing method for labels based on CCD visual alignment according to claim 1, characterized in that: In step S7, a cooling, shaping, and leveling module is set up. The roller pressing and leveling pressure is 0.1-0.2MPa, and the label is naturally cooled to room temperature. The label surface is flat and wrinkle-free, and the dimensions are not deformed.

8. The fully automated screen printing method for labels based on CCD visual alignment according to claim 1, characterized in that: In step S9, a slitting and winding control module is set, with a winding tension parameter of 60-100N and a winding length preset to 500-1000m.

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