Laser mesh making technology for precise dot punching

Abstract

The present invention discloses a laser screen making process for precise dot punching, which relates to printing screen making technology and aims to solve the problem that the laser needs to penetrate the screen to form a uniform mesh. However, the laser needs to penetrate the screen, which consumes a large amount of energy and is prone to affecting the imaging effect of the pattern due to insufficient penetration. The key points of its technical solution are: pre-scanning the plate, selecting the corresponding mesh according to the expected accuracy of the pattern, and retrieving the corresponding mesh parameters, performing digital scanning on the plate to obtain the mesh image; mesh database building, building a database according to the mesh number and mesh sorting array on the mesh, and storing mesh images of corresponding mesh specifications. The present invention punches the mesh position according to the pattern with high precision, avoiding the laser hitting the stems between adjacent meshes, thereby saving energy consumption of the laser equipment and avoiding the problem of uneven mesh surface caused by laser hitting the stems, which affects the printing.

Description

Technical Field

[0001] The present invention relates to a printing screen making technology, and more particularly to a laser screen making process for precise dot punching. Background Art

[0002] Flat screen printing and rotary screen printing are common methods for textile printing, creating patterns with specific colors and textures on the fabric surface, meeting the requirements for aesthetics and diversity. In flat screen printing, the color paste is squeezed by a scraper through a patterned flat screen and onto the fabric. The scraper makes one round trip, the screen rises, and the fabric advances by an interval equal to the pattern's length. The screen then descends, and the scraper operates again, repeating this process.

[0003] The Chinese patent with publication number CN110228280B discloses a 130T printing rotary screen, preparation method and application thereof. The technical key points are: including preparing a fetal membrane with a non-aligned mesh arrangement structure and three electroplating; preparing a fetal membrane with a non-aligned mesh arrangement structure, including using laser to engrave a fetal membrane with a non-aligned mesh arrangement structure, including the following steps: seamless steel tube machining, nickel plating, copper plating, chrome plating, coating photosensitive resin, exposure, laser engraving 130 mesh points with a non-aligned mesh arrangement, etching the mesh, embedding insulating glue, curing, and polishing.

[0004] When making screens, they are often engraved and punched by laser engraving to form meshes for the printing paste to penetrate. When squeezed by a reciprocating scraper, the printing paste penetrates the meshes to achieve the printing effect. However, when laser engraving and punching the screen, the laser needs to penetrate the screen to form a uniform mesh. However, the laser needs to penetrate the screen, which consumes a lot of energy and is prone to affecting the imaging effect of the pattern due to insufficient penetration.

[0005] Therefore, a new solution needs to be proposed to solve this problem. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a laser mesh making process for precise meshing.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions: a laser mesh making process for precise dot punching, characterized in that the steps include:

[0008] Pre-draw the board, select the corresponding mesh according to the expected accuracy of the pattern, and call the corresponding mesh parameters to perform digital drawing to obtain the mesh imaging;

[0009] Mesh database creation: a database is created based on the mesh count and mesh sorting array on the mesh, and mesh images of corresponding mesh specifications are stored;

[0010] Template imaging: trace the mesh to be processed, retrieve the specification parameters of the corresponding mesh from the database, scan the mesh with a high-definition camera, and output the photoelectric signal corresponding to the mesh;

[0011] Pattern design: draw the layout of the printed pattern according to the requirements, perform pixel analysis, and obtain pixel imaging that matches the mesh;

[0012] Positioning and matching: select the pixel points at each corner of the pattern as positioning points, overlap the pixel imaging and mesh imaging, and adjust the pairing of the pixel imaging positioning points with the mesh of the mesh imaging;

[0013] Laser marking is used to mark the mesh according to the pixel points.

[0014] The present invention is further configured as follows: the specific steps of pre-drawing the board include:

[0015] Cutting: Cut the mesh into plates according to the same specifications, and arrange the meshes in order according to the number of meshes;

[0016] Scanning: several meshes are photographed in turn by high-precision cameras, with the complete meshes at each corner of the mesh as calibration points, and scanned to form an image displayed in grayscale to form mesh imaging.

[0017] The present invention is further configured as follows: the specific steps of mesh library building are: reading the mesh image obtained by the pre-scanning operation, counting the number of meshes on the mesh using image recognition technology, and measuring the spacing difference between adjacent meshes in the horizontal and vertical directions to determine the category of the mesh sorting array on the mesh.

[0018] The present invention is further configured as follows: the specific steps of the template imaging include: sending the mesh to be processed to a mesh making machine, scanning the mesh with a high-precision camera, and matching the mesh imaging filed in the database with the mesh to be processed, and recording the distance between the edge of the mesh and the mesh at the corner as a basic reference, and outputting a pixel matrix of photoelectric signals according to the mesh arrangement on the mesh.

[0019] The present invention is further configured as follows: the specific steps of the pattern design are: according to the array direction and mesh number of the mesh on the mesh used, using the selected calibration point as a reference system, setting the drawing ratio of the pattern, and setting the edge of the pattern in a continuous linear correspondence with the pixel points of the pixel matrix.

[0020] The present invention is further configured as follows: the specific steps of positioning and matching are: after completing the adjustment of the pattern drawing ratio, the pixel imaging of the pattern and the pixel matrix are overlapped on the machine, and the pixel points of each corner of the pattern are overlapped with the mesh.

[0021] The present invention is further configured such that when there is a color difference between the color involved in the pattern design step and the grey cloth and the pattern edge, at least two meshes need to be prepared.

[0022] The present invention is further configured such that at least two unit pixel points are arranged between the pattern edges of the two mesh pieces.

[0023] In summary, the present invention has the following beneficial effects:

[0024] 1. By pre-tracing the mesh, meshes of different mesh counts and sorting arrays can be archived, which is convenient for subsequent printing pattern design and style setting based on the specifications of the basic mesh used, thereby improving the matching degree between the mesh and the pattern;

[0025] 2. When making a mesh with laser, the mesh to be processed is scanned to read the specification parameters of the matching mesh in the database. The mesh number of the mesh is verified by the output photoelectric signal and converted into an image form. It is matched with the pixel imaging obtained by the designed pattern analysis. Therefore, when the laser is punching, the mesh position can be punched with high precision according to the pattern, avoiding the laser hitting the stems between adjacent meshes, thus saving the energy consumption of the laser equipment and avoiding the problem of uneven surface of the mesh caused by the laser hitting the stems, which affects the printing.

[0026] 3. For printed meshes with color differences, set up two or more meshes, perform laser drilling on each of them, penetrate the pixel points where the mesh points are located, and set at least two unit pixels between the edges of the patterns designed by the two groups of meshes. This allows the unsolidified color paste during printing to be blended to the reserved pixel points, thereby eliminating the situation where the surface of the grey fabric appears messy when multiple groups of patterns are mixed with multiple colors of color paste. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is the pattern design diagram of the present embodiment;

[0028] Figure 2 is the pixel matrix of the flower pattern in this embodiment. DETAILED DESCRIPTION

[0029] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0030] Example 1: A laser mesh making process for precise dot punching, comprising the following steps:

[0031] A mesh database is established according to the mesh mesh count and mesh sorting array, and mesh images of corresponding mesh specifications are stored. In this embodiment, printing screens with mesh counts of 250, 300, 350, and 420 are selected as meshes, and the mesh sorting array can be divided into a rectangular array with equal vertical and horizontal spacing and an oblique array. The oblique array includes two types, one of which is: the horizontal spacing is greater than the vertical spacing, and the other is: the vertical spacing is greater than the horizontal spacing.

[0032] By building a database of mesh specifications according to mesh count and sorting array, pattern designers can consider the specifications and styles of the mesh in advance when drawing the pattern in the early stages of design, thereby improving the matching degree between the mesh and the pattern and facilitating the subsequent laser punching of the mesh by the plate-making machine.

[0033] Pre-scan, select the corresponding mesh according to the expected accuracy of the pattern, and call the corresponding mesh parameters to perform digital scanning to obtain mesh imaging. Select the appropriate mesh specifications based on the accuracy of the pattern, and call the mesh parameters including mesh number and sorting array, and then perform digital scanning through the equipment to obtain a mesh imaging consistent with the processed mesh, which is compared with the parameters obtained from the database. For the mesh that is scanned for the first time, the data in the data can be improved.

[0034] Template imaging is carried out according to the mesh to be processed, and the specification parameters of the corresponding mesh in the database are retrieved. The mesh is scanned with a high-definition camera and the photoelectric signal corresponding to the mesh is output. After the mesh is traced and scanned with a high-definition camera, the photoelectric signal is output and formed into a digital signal for comparison with the pattern during pattern design, thereby improving the design accuracy of the pattern.

[0035] Flower design, according to Figure 1 The displayed pattern requires drawing the printing pattern format, performing pixel analysis, and obtaining pixel imaging that matches the mesh;

[0036] Positioning and matching, select the pixel points of each corner of the pattern as the positioning points, overlap the pixel imaging and mesh imaging, and adjust the pairing of the pixel imaging positioning points and the mesh of the mesh imaging, for example Figure 2 As indicated, when the pixel points of the pattern are overlapped on the mesh in the same proportion, the photoelectric signal output by the mesh where the pattern line draft is located is a high level. In this embodiment, when the designer designs the pattern and pairs it with the mesh, the pattern can be adjusted to match the arrangement of the mesh on the mesh, thereby improving the effect of the pattern during printing, and limiting the pattern and the mesh on the corresponding mesh so that when laser punching is performed, the mesh can be punched according to the pixel points to achieve high-precision punching operations.

[0037] The specific steps of pre-sketching include:

[0038] Cutting: Cut the mesh into plates according to the same specifications, and arrange the meshes in order according to the number of meshes;

[0039] Scanning: several meshes are photographed in turn by high-precision cameras, with the complete meshes at each corner of the mesh as calibration points, and scanned to form an image displayed in grayscale to form mesh imaging.

[0040] The specific steps of mesh library construction are: reading the mesh image obtained by the pre-scanning operation, counting the mesh number on the mesh with image recognition technology, and measuring the spacing difference between adjacent meshes in the horizontal and vertical directions, judging the category of the mesh sorting array on the mesh, and identifying the mesh sorting array through image recognition technology to achieve matching between the pattern and the mesh.

[0041] The specific steps of template imaging include: sending the mesh to be processed to the mesh making machine, scanning the mesh with a high-precision camera, and matching it with the mesh to be processed according to the mesh image archived in the database, and recording the distance between the mesh edge and the mesh at the corner as a basic reference, and outputting a pixel matrix of photoelectric signals according to the mesh arrangement on the mesh.

[0042] The specific steps of pattern design are: according to the array direction and mesh number of the mesh on the mesh used, use the selected calibration point as the reference system, set the drawing ratio of the pattern, and set the edge of the pattern to correspond to the pixel points of the pixel matrix in a continuous linear manner. When designing the pattern, adjust the inclination angle of the pattern design according to the type of mesh used in the design, so that the edge of the pattern is matched with the mesh as much as possible, thereby reducing the number of holes required, ensuring the smoothness of the edge of the pattern, and improving the effect of the pattern.

[0043] The specific steps of positioning and matching are: after completing the adjustment of the pattern drawing proportion, the machine will overlap the pixel imaging of the pattern with the pixel matrix, and overlap the pixel points of each corner of the pattern with the mesh. Specifically, the pixel imaging and the pixel matrix are matched and overlapped to achieve the matching of the pixel points of the pattern with the mesh on the mesh, thereby improving the calibration progress and the accuracy of punching, thereby avoiding the laser deviation from the stem between the two meshes, causing the mesh surface to be uneven and affecting the operation of flat screen / rotary screen printing.

[0044] Implementation 2: The difference from Implementation 1 is that: when there is a color difference between the colors involved in the pattern design step and the grey cloth and the edge of the pattern, at least two meshes need to be prepared, that is, the fabric is arranged into at least two color domains along the edge of the pattern, and at least two unit pixels are set between the edges of the patterns of the two meshes. When screen printing is realized, when color pastes of different colors are screen-printed onto the fabric through two meshes, the color pastes that have not solidified during printing can be smudged toward the reserved pixels, thereby eliminating the situation where the surface of the grey cloth appears messy when multi-color color pastes are mixed between multiple groups of patterns.

[0045] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A laser mesh making process for precise dot punching, characterized by: The steps include: Pre-draw the board, select the corresponding mesh according to the expected accuracy of the pattern, and call the corresponding mesh parameters to perform digital drawing to obtain the mesh imaging; Mesh database creation: a database is created based on the mesh count and mesh sorting array on the mesh, and mesh images of corresponding mesh specifications are stored; Template imaging: trace the mesh to be processed, retrieve the specification parameters of the corresponding mesh from the database, scan the mesh with a high-definition camera, and output the photoelectric signal corresponding to the mesh; Pattern design: draw the layout of the printed pattern according to the requirements, perform pixel analysis, and obtain pixel imaging that matches the mesh; Positioning and matching: select the pixel points at each corner of the pattern as positioning points, overlap the pixel imaging and mesh imaging, and adjust the pairing of the pixel imaging positioning points with the mesh of the mesh imaging; Laser marking is used to mark the mesh according to the pixel points.

2. The laser mesh making process for precise dot punching according to claim 1, characterized in that: The specific steps of the pre-drawing board include: Cutting: Cut the mesh into plates according to the same specifications, and arrange the meshes in order according to the number of meshes; Scanning: several meshes are photographed in turn by a high-precision camera, with the complete meshes at each corner of the mesh as calibration points, and scanned to form an image displayed in grayscale to form mesh imaging.

3. The laser mesh making process for precise dot punching according to claim 1, characterized in that: The specific steps of the mesh library building are: reading the mesh image obtained by the pre-scanning operation, counting the number of meshes on the mesh using image recognition technology, and measuring the spacing difference between adjacent meshes in the horizontal and vertical directions to determine the category of the mesh sorting array on the mesh.

4. The laser mesh making process for precise dot punching according to claim 2, characterized in that: The specific steps of the template imaging include: sending the mesh to be processed to the mesh making machine, scanning the mesh with a high-precision camera, and matching the mesh image filed in the database with the mesh to be processed, and recording the distance between the edge of the mesh and the mesh at the corner as a basic reference, and outputting a pixel matrix of photoelectric signals according to the mesh arrangement on the mesh.

5. The laser mesh making process for precise dot punching according to claim 4, characterized in that: The specific steps of the pattern design are: according to the array direction and mesh number of the mesh on the mesh used, using the selected calibration point as the reference system, setting the drawing ratio of the pattern, and setting the edge of the pattern in a continuous linear correspondence with the pixel points of the pixel matrix.

6. The laser mesh making process for precise dot punching according to claim 5, characterized in that: The specific steps of the positioning and matching are: after completing the adjustment of the pattern drawing ratio, the pixel imaging of the pattern and the pixel matrix are overlapped on the machine, and the pixel points of each corner of the pattern are overlapped with the mesh.

7. The laser mesh making process for precise dot punching according to claim 6, characterized in that: When there is a color difference between the color involved in the pattern design step and the grey cloth and the pattern edge, at least two meshes need to be prepared.

8. The laser mesh making process for precise dot punching according to claim 7, characterized in that: At least two unit pixel points are arranged between the pattern edges of the two mesh pieces.

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