Synchronous registration screen printing plate screen making process and application of synchronous registration of screen printing plates of synchronous registration screen printing plate screen making process

Abstract

The invention discloses a synchronous registration screen printing plate screen making process and application of synchronous registration of a screen printing plate. Comprising the following steps: S1, designing a pattern: designing a screen pattern on which at least two printing areas are arranged on the same screen according to a printing requirement, and reasonably arranging the printing areas on the screen to ensure a relative position relationship between the patterns, so that the patterns in front of and behind the clothes are accurately aligned during printing; s2, making a screen: installing the designed screen printing plate on a laser screen making machine, ensuring the consistency of the positions of the screen printing plate in different areas in the screen making process through a positioning device, and accurately making the screen on the screen printing plate by using the laser screen making machine to form a required printing area; s3, a registration stage; s4, a printing stage; the multiple printing areas are arranged on the same screen printing plate, the frequency of replacing the screen printing plate is reduced, the production efficiency is improved, the screen printing plate is fixed through a simple positioning device such as a positioning pin, and the mounting and dismounting time of the screen printing plate is shortened.

Description

Technical Field

[0001] The invention belongs to the technical field of screen printing, and in particular relates to a synchronous pattern-aligning screen making process and an application of the synchronous pattern-aligning screen. Background Art

[0002] Screen printing is a widely used printing method, especially in the fields of clothing, advertising, packaging, etc.

[0003] For example, the screen making process disclosed in the announcement number CN116330813A, although it realizes that when the warp and weft of the metal mesh are corroded by an etching solution, a brush roller is used to brush the warp and weft of the metal mesh, which can accelerate the corrosion rate of the warp and weft, improve the corrosion efficiency, and increase the production capacity, but it does not solve the problems existing in the existing screen making process and the application of the screen synchronous alignment: traditional silk screen printing usually requires a separate screen to be made for each printing area, which not only increases the cost, but also may cause the problem of inaccurate printing position. In addition, although the existing laser screen making technology can improve the accuracy of the screen, it is difficult to ensure consistency and accuracy of repeated positioning in the process of making multiple screens. For this reason, we propose a synchronous alignment screen making process and the application of the screen synchronous alignment. Summary of the invention

[0004] The object of the present invention is to provide a synchronous screen-printing screen-making process and the application of the synchronous screen-printing screen-printing process to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a synchronous screen-setting screen making process, comprising the following steps: S1. Pattern design: Design a screen pattern with at least two printing areas on the same screen according to printing requirements, and reasonably layout the printing areas on the screen to ensure the relative position relationship between the patterns so that the patterns on the front and back of the garment are accurately aligned during printing; S2. Screen making: Install the designed screen on the laser screen making machine, and use the positioning device to ensure the consistency of the position of the screen in different areas during the screen making process. Use the laser screen making machine to accurately make the screen on the screen to form the required printing area; S3. Alignment stage: The alignment of multiple printing areas on the screen is adjusted by the precision alignment device, the alignment accuracy is verified by actual printing samples, the patterns are accurately aligned in the continuous printing of different printing areas, and the alignment of multiple printing areas on the screen is completed; S4. Printing stage: After completing the screen making and pattern adjustment, the designed screen is installed on the screen printing machine, and the same screen is used to continuously print different areas of the article to complete the synchronous pattern processing of the clothing.

[0006] Preferably, the positioning device in S2 includes an optical positioning system and a mechanical positioning component, the optical positioning system includes a high-resolution camera and an image processing unit, the high-resolution camera is used to capture the position information of the screen, the image processing unit uses an image processing algorithm to calculate the position deviation of the screen through the image information captured by the high-resolution camera, and adjusts it; the mechanical positioning component includes positioning pins and fine-tuning screws, the positioning pins are set at the four corners of the screen to ensure the precise positioning of the screen during installation, and the fine-tuning screws are used to make slight position adjustments to ensure the precise alignment of the screen.

[0007] Preferably, the image processing algorithm includes a precision positioning algorithm, which is used to ensure the consistency of the position of the screen in the screen making process in different areas during the screen installation stage. The precision positioning algorithm includes a least squares method, a sub-pixel positioning method and a Gaussian fitting method. The Gaussian fitting method includes the following formula: =A exp ; Among them, g(x) is the Gaussian function used to fit the data points; A is the amplitude or the height of the maximum value; x0 is the location of the peak, which is the center of the Gaussian function; δ is the standard deviation, which determines the width of the Gaussian function, and x is the sub-pixel position.

[0008] Preferably, the net making in S2 specifically includes the following steps: S201. Screen preparation: prepare the screen material for laser screen making, set the appropriate screen size according to the design requirements, and the screen material includes one of polyester screen, nylon screen and stainless steel screen; S202. Screen tensioning: Use an automatic tensioning machine to tension the screen before making the screen; S203. Screen glue coating: After the screen is tensioned, the screen is glued to form a photosensitive film layer; S204. Screen exposure: After the screen is coated with glue, it is exposed to form a pattern area; S205. Screen washing: After exposure, the screen is washed to remove uncured glue and form pattern holes; S206. Screen curing: After washing, the screen is cured to enhance the stability and durability of the screen; S207. Screen inspection: After curing, use a magnifying glass or microscope to check whether the pattern on the screen has defects such as clogged holes or unclear edges, to ensure that the screen quality meets the requirements. Repair or remake the screen that does not meet the requirements.

[0009] Preferably, the screen coating in S203 specifically includes: using water-based or solvent-based photosensitive glue, evenly applying the photosensitive glue through a glue coating machine to ensure that the coating thickness is uniform, and placing the screen in a dry environment after coating to dry the photosensitive glue; the screen exposure in S204 specifically includes: using a dedicated exposure machine, placing the screen coated with photosensitive glue in the exposure machine, in close contact with the film, and irradiating it with a light source to cause a chemical change in the photosensitive glue to form a pattern area.

[0010] Preferably, the screen washing in S205 specifically includes: using a high-pressure water gun, placing the exposed screen on a washing table, washing with high-pressure water flow or nozzle, adjusting the washing time to 3-10 minutes according to the material of the screen and the characteristics of the photosensitive glue, removing uncured photosensitive glue, and forming pattern holes; the screen curing in S206 specifically includes: using a UV curing machine, placing the washed screen in the UV curing machine, curing it by irradiation with a UV light source, and adjusting the curing time to 30-90 minutes according to the characteristics of the photosensitive glue and the power of the curing equipment, so that the photosensitive glue is completely cured to form a stable pattern area.

[0011] Preferably, in S3, the alignment adjustment algorithm used includes a correlation algorithm, which is used to measure the similarity between the two images and find the best matching position. The specific formula is: = ; Among them, f(x,y) is the reference image, the image with the correct position known; g(x,y) is the image to be aligned; R(f,g) is the correlation between the two images, and x,y are the given positions.

[0012] Preferably, the alignment adjustment algorithm in S3 further includes a mutual information algorithm for measuring the degree of information sharing between two images, and the specific formula is: = ; Among them, I(f;g) is the mutual information, which is used to measure the amount of information shared between two images; p(f(x,y),g(x,y)): is the joint probability distribution, which indicates the probability of both f and g appearing at a given position (x,y); p(f(x,y)) is the marginal probability distribution, i.e. the probability of f at (x,y); p(g(x,y)) is the marginal probability distribution, i.e. the probability of g at (x,y).

[0013] Preferably, the precision alignment device in S3 includes a collection camera, an adjustment module and an adjustment mechanism. The collection camera is used to capture the pattern position information on the screen. The adjustment module adopts an image processing algorithm to calculate the position deviation of the pattern through the image information captured by the collection camera and make adjustments. The adjustment mechanism performs position fine-tuning through a manual or electric fine-tuning hand wheel to ensure accurate alignment of the pattern.

[0014] An application of synchronous screen alignment includes the following steps: Step 1: Screen installation: Install the designed screen on the laser screen making machine and use the positioning device to ensure the accurate positioning of the screen; Step 2: Screen making: Precisely screen multiple printing areas on the screen using a laser screen making machine; Step 3: Adjust the pattern: Use the precision pattern alignment device to adjust the multiple printing areas on the screen to ensure accurate alignment of the pattern; Step 4: Printing: Use the same screen to continuously print different areas of the item to achieve a high-precision synchronous printing effect.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention reduces the number of screen replacements and improves production efficiency by providing multiple printing areas on the same screen. A simple positioning device, such as a positioning pin, is used to fix the screen, thereby shortening the installation and removal time of the screen. (2) The present invention uses a precision alignment device to adjust the alignment of multiple printing areas on the screen, ensuring that the patterns can be accurately aligned during continuous printing in different areas. The specifically set acquisition camera, adjustment module and adjustment mechanism ensure the consistency of the position of the screen in the screen making process in different areas, thereby improving the printing accuracy. (3) The present invention ensures that the patterns in different areas can be accurately aligned through precise positioning and pattern adjustment, reduces errors caused by human factors, improves the working environment, and improves the quality of the final product. The high-precision laser screen making technology is used to ensure that the pattern on the screen is clear and the edges are sharp; (4) The present invention can meet the printing requirements of different types of products by setting multiple printing areas on the same screen, such as printing on different positions of clothing, and can flexibly adjust the position of the pattern according to specific needs to meet the customized needs of different customers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a flow chart of the process of the present invention; Figure 2 It is a specific flow chart of the net making in the present invention; Figure 3 Flow chart of the application of the present invention. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-Figure 3 The present invention provides a technical solution: a synchronous screen-setting screen making process, comprising the following steps: S1. Pattern design: Design a screen pattern with at least two printing areas on the same screen according to printing requirements, and reasonably layout the printing areas on the screen to ensure the relative position relationship between the patterns so that the patterns on the front and back of the garment are accurately aligned during printing; S2. Screen making: Install the designed screen on the laser screen making machine, and use the positioning device to ensure the consistency of the position of the screen in different areas during the screen making process. Use the laser screen making machine to accurately make the screen on the screen to form the required printing area; S3. Alignment stage: The alignment of multiple printing areas on the screen is adjusted by the precision alignment device, the alignment accuracy is verified by actual printing samples, the patterns are accurately aligned in the continuous printing of different printing areas, and the alignment of multiple printing areas on the screen is completed; S4. Printing stage: After completing the screen making and pattern adjustment, the designed screen is installed on the screen printing machine, and the same screen is used to continuously print different areas of the article to complete the synchronous pattern processing of the clothing.

[0019] In this embodiment, the positioning device in S2 includes an optical positioning system and a mechanical positioning component. The optical positioning system includes a high-resolution camera and an image processing unit. The high-resolution camera is used to capture the position information of the screen. The image processing unit uses an image processing algorithm to calculate the position deviation of the screen through the image information captured by the high-resolution camera and make adjustments. The mechanical positioning component includes positioning pins and fine-tuning screws. The positioning pins are set at the four corners of the screen to ensure the precise positioning of the screen during installation. The fine-tuning screws are used to make slight position adjustments to ensure the precise alignment of the screen.

[0020] In this embodiment, the image processing algorithm includes a precise positioning algorithm, which is used to ensure the consistency of the position of the screen in the screen making process in different areas during the screen installation stage. The precise positioning algorithm includes the least squares method, the sub-pixel positioning method and the Gaussian fitting method. The Gaussian fitting method includes the following formula: =A exp ; Among them, g(x) is the Gaussian function used to fit the data points; A is the amplitude or the height of the maximum value; x0 is the location of the peak, which is the center of the Gaussian function; δ is the standard deviation, which determines the width of the Gaussian function, and x is the sub-pixel position.

[0021] In this embodiment, the mesh making in S2 specifically includes the following steps: S201. Screen preparation: prepare the screen material for laser screen making, set the appropriate screen size according to the design requirements, and the screen material includes one of polyester screen, nylon screen and stainless steel screen; S202. Screen tensioning: Use an automatic tensioning machine to tension the screen before making the screen; S203. Screen glue coating: After the screen is tensioned, the screen is glued to form a photosensitive film layer; S204. Screen exposure: After the screen is coated with glue, it is exposed to form a pattern area; S205. Screen washing: After exposure, the screen is washed to remove uncured glue and form pattern holes; S206. Screen curing: After washing, the screen is cured to enhance the stability and durability of the screen; S207. Screen inspection: After curing, use a magnifying glass or microscope to check whether the pattern on the screen has defects such as clogged holes or unclear edges, to ensure that the screen quality meets the requirements. Repair or remake the screen that does not meet the requirements.

[0022] In this embodiment, the screen coating in S203 specifically includes: using water-based or solvent-based photosensitive glue, evenly applying the photosensitive glue through a glue coating machine to ensure that the coating thickness is uniform, and placing the screen in a dry environment after coating to dry the photosensitive glue; the screen exposure in S204 specifically includes: using a dedicated exposure machine, placing the screen coated with photosensitive glue in the exposure machine, in close contact with the film, and irradiating it with a light source to cause a chemical change in the photosensitive glue to form a pattern area.

[0023] In this embodiment, the screen washing in S205 specifically includes: using a high-pressure water gun, placing the exposed screen on a washing table, using a high-pressure water flow or a nozzle to wash, adjusting the washing time to 3-10 minutes according to the material of the screen and the characteristics of the photosensitive glue, removing uncured photosensitive glue, and forming pattern holes; the screen curing in S206 specifically includes: using a UV curing machine, placing the washed screen in the UV curing machine, curing it by irradiation with a UV light source, and adjusting the curing time to 30-90 minutes according to the characteristics of the photosensitive glue and the power of the curing equipment, so that the photosensitive glue is completely cured to form a stable pattern area.

[0024] In this embodiment, in S3, the flower adjustment algorithm used includes a correlation algorithm, which is used to measure the similarity between the two images and find the best matching position. The specific formula is: = ; Among them, f(x,y) is the reference image, the image with the correct position known; g(x,y) is the image to be aligned; R(f,g) is the correlation between the two images, and x,y are the given positions.

[0025] In this embodiment, the alignment adjustment algorithm in S3 also includes a mutual information algorithm for measuring the degree of information sharing between two images. The specific formula is: = ; Among them, I(f;g) is the mutual information, which is used to measure the amount of information shared between two images; p(f(x,y),g(x,y)): is the joint probability distribution, which indicates the probability of both f and g appearing at a given position (x,y); p(f(x,y)) is the marginal probability distribution, i.e. the probability of f at (x,y); p(g(x,y)) is the marginal probability distribution, i.e. the probability of g at (x,y).

[0026] In this embodiment, the precision alignment device in S3 includes a collection camera, an adjustment module and an adjustment mechanism. The collection camera is used to capture the pattern position information on the screen. The adjustment module adopts an image processing algorithm to calculate the position deviation of the pattern through the image information captured by the collection camera and make adjustments. The adjustment mechanism fine-tunes the position through a manual or electric fine-tuning hand wheel to ensure accurate alignment of the pattern.

[0027] An application of synchronous screen alignment includes the following steps: Step 1: Screen installation: Install the designed screen on the laser screen making machine and use the positioning device to ensure the accurate positioning of the screen; Step 2: Screen making: Precisely screen multiple printing areas on the screen using a laser screen making machine; Step 3: Adjust the pattern: Use the precision pattern alignment device to adjust the multiple printing areas on the screen to ensure accurate alignment of the pattern; Step 4: Printing: Use the same screen to continuously print different areas of the item to achieve a high-precision synchronous printing effect.

[0028] Principles and advantages of the present invention: The present invention reduces the number of screen replacement times and improves production efficiency by arranging multiple printing areas on the same screen, and adopts a simple positioning device, such as a positioning pin to fix the screen, thereby shortening the installation and disassembly time of the screen; uses a precise pattern alignment device to adjust the multiple printing areas on the screen, ensuring that the patterns can be accurately aligned during continuous printing in different areas, and ensures the consistency of the position of the screen in the screen making process in different areas through the specifically arranged acquisition camera, adjustment module and adjustment mechanism, thereby improving printing accuracy; through precise positioning and pattern alignment adjustment, it is ensured that the patterns in different areas can be accurately aligned, reducing errors caused by human factors, improving the working environment, and improving the quality of the final product; using high-precision laser screen making technology, it is ensured that the pattern on the screen is clear and the edges are sharp; by arranging multiple printing areas on the same screen, it can adapt to the printing needs of different types of products, such as printing at different positions of clothing, and the position of the pattern can be flexibly adjusted according to specific needs to meet the customized needs of different customers.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A synchronous pattern screen making process, characterized by: The following steps are involved: S1. Pattern design: Design a screen pattern with at least two printing areas on the same screen according to printing requirements, and reasonably layout the printing areas on the screen to ensure the relative position relationship between the patterns so that the patterns on the front and back of the garment are accurately aligned during printing; S2. Screen making: Install the designed screen on the laser screen making machine, and use the positioning device to ensure the consistency of the position of the screen in different areas during the screen making process. Use the laser screen making machine to accurately make the screen on the screen to form the required printing area; S3. Registration stage: The registration of multiple printing areas on the screen is adjusted by the precision registration device, the registration accuracy is verified by actual printing samples, the patterns are accurately aligned in the continuous printing of different printing areas, and the registration of multiple printing areas on the screen is completed; S4. Printing stage: After completing the screen making and pattern adjustment, the designed screen is installed on the screen printing machine, and the same screen is used to continuously print different areas of the article to complete the synchronous pattern processing of the clothing.

2. The synchronous pattern screen making process according to claim 1, characterized in that: The positioning device in S2 includes an optical positioning system and a mechanical positioning component. The optical positioning system includes a high-resolution camera and an image processing unit. The high-resolution camera is used to capture the position information of the screen. The image processing unit uses an image processing algorithm to calculate the position deviation of the screen through the image information captured by the high-resolution camera and make adjustments. The mechanical positioning component includes positioning pins and fine-tuning screws. The positioning pins are set at the four corners of the screen to ensure the precise positioning of the screen during installation. The fine-tuning screws are used to make slight position adjustments to ensure the precise alignment of the screen.

3. The synchronous pattern screen making process according to claim 2, characterized in that: The image processing algorithm includes a precision positioning algorithm, which is used to ensure the consistency of the position of the screen in the screen making process in different areas during the screen installation stage. The precision positioning algorithm includes the least squares method, the sub-pixel positioning method and the Gaussian fitting method. The Gaussian fitting method includes the following formula: =A exp ; Among them, g(x) is the Gaussian function used to fit the data points; A is the amplitude or the height of the maximum value; x0 is the location of the peak, which is the center of the Gaussian function; δ is the standard deviation, which determines the width of the Gaussian function, and x is the sub-pixel position.

4. The synchronous pattern screen making process according to claim 1, characterized in that: The mesh making in S2 specifically includes the following steps: S201. Screen preparation: prepare the screen material for laser screen making, set the appropriate screen size according to the design requirements, and the screen material includes one of polyester screen, nylon screen and stainless steel screen; S202. Screen tensioning: Use an automatic tensioning machine to tension the screen before making the screen; S203. Screen glue coating: After the screen is tensioned, the screen is glued to form a photosensitive film layer; S204. Screen exposure: After the screen is coated with glue, it is exposed to form a pattern area; S205. Screen washing: After exposure, the screen is washed to remove uncured glue and form pattern holes; S206. Screen curing: After washing, the screen is cured to enhance the stability and durability of the screen; S207. Screen inspection: After curing, use a magnifying glass or microscope to check whether the pattern on the screen has defects such as clogged holes or unclear edges, to ensure that the screen quality meets the requirements. Repair or remake the screen that does not meet the requirements.

5. The synchronous pattern screen making process according to claim 4 is characterized in that: The screen coating in S203 specifically includes: using water-based or solvent-based photosensitive glue, evenly applying the photosensitive glue through a glue coating machine to ensure that the coating thickness is uniform, and placing the screen in a dry environment after coating to dry the photosensitive glue; the screen exposure in S204 specifically includes: using a dedicated exposure machine, placing the screen coated with photosensitive glue in the exposure machine, in close contact with the film, and irradiating it with a light source to cause a chemical change in the photosensitive glue to form a pattern area.

6. A synchronous pattern screen making process according to claim 5, characterized in that: The screen washing in S205 specifically includes: using a high-pressure water gun, placing the exposed screen on a washing table, washing with high-pressure water or a nozzle, adjusting the washing time to 3-10 minutes according to the material of the screen and the characteristics of the photosensitive glue, removing uncured photosensitive glue, and forming pattern holes; the screen curing in S206 specifically includes: using a UV curing machine, placing the washed screen in the UV curing machine, curing it by irradiation with a UV light source, adjusting the curing time to 30-90 minutes according to the characteristics of the photosensitive glue and the power of the curing equipment, so that the photosensitive glue is completely cured to form a stable pattern area.

7. The synchronous pattern screen making process according to claim 1, characterized in that: In S3, the flower adjustment algorithm used includes a correlation algorithm, which is used to measure the similarity between the two images and find the best matching position. The specific formula is: = ； Among them, f(x,y) is the reference image, the image with the correct position known; g(x,y) is the image to be aligned; R(f,g) is the correlation between the two images, and x,y are the given positions.

8. The synchronous pattern screen making process according to claim 7, characterized in that: The alignment algorithm in S3 also includes a mutual information algorithm for measuring the degree of information sharing between two images. The specific formula is: = ； Among them, I(f;g) is the mutual information, which is used to measure the amount of information shared between two images; p(f(x,y),g(x,y)): is the joint probability distribution, which indicates the probability of both f and g appearing at a given position (x,y); p(f(x,y)) is the marginal probability distribution, i.e. the probability of f at (x,y); p(g(x,y)) is the marginal probability distribution, i.e. the probability of g at (x,y).

9. The synchronous pattern screen making process according to claim 1, characterized in that: The precision alignment device in S3 includes a collection camera, an adjustment module and an adjustment mechanism. The collection camera is used to capture the pattern position information on the screen. The adjustment module adopts an image processing algorithm to calculate the position deviation of the pattern through the image information captured by the collection camera and make adjustments. The adjustment mechanism fine-tunes the position through a manual or electric fine-tuning hand wheel to ensure accurate alignment of the pattern.

10. An application of synchronous screen alignment, characterized by: The synchronous operation of the screen making process of the screen plate according to any one of claims 1 to 9 comprises the following steps: Step 1: Screen installation: Install the designed screen on the laser screen making machine and use the positioning device to ensure the accurate positioning of the screen; Step 2: Screen making: Precisely screen multiple printing areas on the screen using a laser screen making machine; Step 3: Adjust the pattern: Use the precision pattern alignment device to adjust the multiple printing areas on the screen to ensure accurate alignment of the pattern; Step 4: Printing: Use the same screen to continuously print different areas of the item to achieve a high-precision synchronous printing effect.

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