Manufacturing method of metal printing plate for solar silk-screen printing

Abstract

The invention provides a manufacturing method of a metal printing plate for solar silk-screen printing, which enables the metal printing plate not to be easily worn or attached to a substrate, so that the service life of the metal printing plate is prolonged, and the printing quality is improved. An upper slurry storage groove of a grid line groove is obtained in a grid line area of a central area of a metal plate body through chemical etching processing, then a slurry outlet groove is obtained in each slurry storage groove through processing by a laser cutting process, and finally a heightening layer made of a PI film material is arranged between the adjacent slurry outlet grooves in the back surface of the metal plate body.

Description

Technical Field

[0001] This invention relates to the technical field of solar screen printing, specifically to a method for manufacturing a metal printing plate for solar screen printing. Background Technology

[0002] Existing solar screen printing typically uses tungsten wire mesh for printing. This mesh is formed by arranging several tungsten wires into grid lines. During actual printing, the mesh's high porosity results from the spaced arrangement of tungsten wires through these grid lines. In practice, non-printing areas need to be masked with PI film, and laser-cut grooves are made in the PI film for the printing areas. This process is relatively complex. Furthermore, as patterns become smaller and lines become finer, the required wire diameter of the screen also increases, further complicating the mesh manufacturing process. Additionally, existing screen printing methods use a relatively large amount of silver paste, leading to higher printing costs.

[0003] Consequently, the structure of metal printing plates was developed. However, in the existing manufacturing process, metal printing plates only have an outlet tank and a storage tank, with the storage tank located above the outlet tank. As a result, during actual screen printing, a large area of ​​the bottom of the metal plate is adhered to the substrate to be printed. Since the screen printing process requires the action of a squeegee, which adheres the metal plate to the substrate, the metal plate is relatively thin. When removing the metal printing plate, it is easy to deform, leading to scrap, or cause significant friction between the metal plate and the substrate, resulting in wear on the substrate. Therefore, there is an urgent need to develop a corresponding manufacturing method that can prevent wear on the metal printing plate or ensure proper adhesion to the substrate, thereby improving the service life of the metal printing plate and enhancing printing quality. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a method for manufacturing a metal printing plate for solar screen printing, which makes the metal printing plate less prone to wear or adhesion to the substrate, thereby improving the service life of the metal printing plate and enhancing printing quality.

[0005] A method for manufacturing a metal printing plate for solar screen printing is characterized by: obtaining an upper slurry storage tank of grid lines in the grid line area of ​​the central region of the metal plate body by chemical etching, then obtaining an outlet slurry tank in each slurry storage tank by laser cutting, and finally setting a pad layer of PI film material between adjacent outlet slurry tanks on the back side of the metal plate body.

[0006] Its further feature is that it specifically includes the following steps: S1 Prepares a metal plate body with a defined rectangular shape; S2 applies photoresist to the non-gate groove reservoir area on the upper surface of the metal plate body, and then protects the areas that do not need to be etched by exposure and development, so that the areas that need to be etched are exposed. Each reservoir with a set width and depth is etched by etching solution. After S3, the metal plate body is cleaned and dried after removing the photoresist. S4 sheet metal is used to obtain the discharge groove in the storage tank area through laser cutting process, and each discharge groove corresponds exactly to the center area of ​​the width direction of its corresponding storage tank to form a metal printing plate. S5 involves hot-pressing a PI film onto a metal printing plate with the back side facing up. S6 uses a laser process to remove the non-cushioned high-layer portion of the PI film, preserving only the cushioned high-layer area. The laser power in this process only removes the PI film and has no effect on the metal printed circuit board.

[0007] Its further characteristic is: In step S5, the thickness of the PI film is 2μm-5μm; The hot pressing process parameters for PI film are: pressing at 180℃~210℃ and under a pressure of 30kg~40kg for 20min~30min; The width of the padding layer obtained in step S6 is less than the distance between adjacent slurry outlets, and the width of the padding layer is located at the center of the interval between adjacent slurry outlets.

[0008] A metal printing plate for solar screen printing, characterized in that: It includes a metal plate body; the central area of ​​the metal plate body is provided with a grid line area for screen printing, and several sets of parallel and spaced grid line grooves are arranged in the grid line area. Each grid line groove is arranged through the thickness direction of the metal plate body. The grid line groove includes an upper slurry storage tank and a lower slurry outlet tank. The width of the slurry storage tank is greater than the width of the slurry outlet tank. The width and length of the slurry outlet tank are set according to the shape and size of the preset printing line. The grid line area of ​​the metal plate body is provided with a downwardly protruding pad layer corresponding to the interval area between adjacent slurry outlet tanks. The material of the pad layer is PI film.

[0009] Its further features are: The metal plate body is made of 304 stainless steel or 316 stainless steel, and the thickness of the metal plate body is 10μm to 200μm. The width of the slurry storage tank is 20μm to 200μm, and the depth of the slurry storage tank is 5μm to 15μm less than the thickness of the metal plate body; The width of the discharge trough is 5μm to 20μm, the depth of the discharge trough is 5μm to 15μm, and the sum of the depth of the discharge trough and the depth of the storage trough is equal to the thickness of the metal plate body. The thickness of the padding layer is 2μm-5μm, and the width of the padding layer is 0.5 to 0.9 times the interval between adjacent discharge tanks, with discharge channels provided for silver paste.

[0010] After processing the metal plate body to obtain the slurry storage tank and the slurry discharge tank, a metal printing plate is obtained. A PI film pad layer is set at the interval position between the slurry discharge tanks on the back of the metal printing plate. This allows the PI film pad layer to contact the substrate during the printing process, thereby preventing the metal printing plate from directly contacting the substrate during screen printing. This makes the metal printing plate less prone to wear or adhesion to the substrate, thus improving the service life of the metal printing plate and enhancing the printing quality. Attached Figure Description

[0011] Figure 1 This is a three-dimensional schematic diagram of the metal printing plate of the present invention; Figure 2 This is an enlarged view of the arrangement of the grid grooves in this invention; The names corresponding to the serial numbers in the diagram are as follows: Metal plate body 10, grid area 20, grid groove 30, slurry storage tank 31, slurry outlet tank 32, and pad layer 40. Detailed Implementation

[0012] A method for manufacturing a metal printing plate for solar screen printing, see [link to documentation]. Figures 1-2 In the central area of ​​the metal plate body 10, the grid line area 20 is chemically etched to obtain the upper slurry storage tank 31 of the grid line groove 30. Then, the slurry outlet groove 32 is processed in each slurry storage tank 31 by laser cutting. Finally, a PI film material pad layer 40 is set between adjacent slurry outlet grooves 32 on the back side of the metal plate body 10.

[0013] Specifically, it includes the following steps: S1. Prepare a rectangular metal plate body 10. The metal plate body 10 is made of 304 stainless steel or 316 stainless steel. The hardness (HV) of the metal plate body 10 is 140-200, its elongation is ≥40%, and the thickness of the metal plate body is 50μm. S2 applies photoresist to the non-defined slurry reservoir area on the upper surface of the metal plate body 10, and then protects the areas that do not need to be etched by exposure and development, so that the areas that need to be etched are exposed. The slurry reservoirs 31 with defined width and depth are etched by etching solution. In specific implementation, the width of each slurry reservoir 31 is 20μm and the depth is 40μm. After S3, the metal plate body 10 is cleaned and dried after removing the photoresist. S4 mesh is formed by laser cutting to obtain discharge grooves 32 in the area of ​​the storage tank 31, and each discharge groove 32 corresponds to the center area of ​​its corresponding storage tank 31 in the width direction to form a metal printing plate. In step S4, the laser cutting process uses a femtosecond laser with a frequency of 700kHz, a 15W laser at 40-60% power, a pulse number of 2, a frequency division of 1, a pulse width of 500fs, a speed of 500-1000mm / s, and 4-8 cuts. The final slurry outlet has a width of 10μm and a depth of 10μm, and the width interval between adjacent slurry outlets 31 is 0.9mm. S5 involves hot-pressing a PI film with the back side of the metal printed circuit board facing upwards. The PI film thickness is 5μm. The hot-pressing process parameters for the PI film are: pressing at 200℃ and 35kg pressure for 30 minutes. S6 removes the non-cushion layer portion of the PI film using a laser process, preserving only the cushion layer 40 area. The laser power of the laser process only removes the PI film and has no effect on the metal plate body 10. The laser process uses a femtosecond laser with a frequency of 700kHz, 10-20% power of a 15W laser, a pulse number of 2, a frequency division of 1, a pulse width of 500fs, and a speed of 1000-1500mm / s. Based on a pre-set padding layer 40 with a width of 0.6mm, the padding layer 40 of the PI film is finally obtained by combining the pattern position. In step S6, the width of the padding layer 40 is located at the center of the interval between adjacent slurry outlet troughs 32.

[0014] A metal printing plate for solar screen printing, see Figures 1-2 It includes a metal plate body 10; the central area of ​​the metal plate body 10 is provided with a grid line area 20 for screen printing, and a number of parallel grid line grooves 30 are arranged in the grid line area 20. Each grid line groove 30 is arranged through the thickness direction of the metal plate body 10. The grid line groove 30 includes an upper slurry storage tank 31 and a lower slurry outlet tank 32. The width of the slurry storage tank 31 is greater than the width of the slurry outlet tank 32. The width and length of the slurry outlet tank 32 are set according to the shape and size of the preset printing line. The grid line area 20 of the metal plate body 10 is provided with a downwardly protruding pad layer 40 corresponding to the interval area of ​​the adjacent slurry outlet tank 32. The pad layer 40 is made of PI film.

[0015] In specific implementation, the metal plate body 10 is made of 304 stainless steel or 316 stainless steel, and the thickness of the metal plate body 10 is 10μm to 200μm. The width of the slurry storage tank 31 is 20μm to 200μm, and the depth of the slurry storage tank 31 is 5μm to 15μm less than the thickness of the metal plate body 10. The width of the discharge trough 32 is 5μm to 20μm, the depth of the discharge trough 32 is 5μm to 15μm, and the sum of the depth of the discharge trough 32 and the depth of the storage trough 31 is equal to the thickness of the metal plate body 10. The thickness of the padding layer 40 is 2μm-5μm, and the width of the padding layer 40 is 0.5 to 0.9 times the interval between adjacent discharge tanks 32, leaving discharge channels for silver paste.

[0016] In a specific embodiment, the width of the slurry outlet 32 ​​is 10 μm; the width interval between adjacent groups of slurry outlet outlets 31 is 0.9 mm; the thickness of the PI film is 5 μm, that is, the thickness of the padding layer 40 is 5 μm, and the width of the padding layer 40 is 0.6 mm.

[0017] After the metal plate body is processed to obtain the slurry storage tank and the slurry discharge tank, a metal printing plate is formed. Then, a PI film pad layer is set at the interval position between the slurry discharge tanks on the back of the metal printing plate. This ensures that the PI film pad layer contacts the substrate during the printing process, so that the metal printing plate does not directly contact the substrate during the screen printing process. This makes the metal printing plate less prone to wear or adhesion to the substrate, thereby improving the service life of the metal printing plate and improving the printing quality.

[0018] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0019] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for the production of a metal printing plate for solar screen printing, characterized in that: The upper layer of the slurry tank of the grid line groove in the center area of the metal plate body is obtained by chemical etching process, then the slurry tank is processed in each slurry tank by laser cutting process, and finally the PI film material is arranged between the adjacent slurry tank on the back of the metal plate body.

2. A method of making a metal printing plate for solar screen printing according to claim 1, wherein, Specifically, the method comprises the following steps: S1, preparing a metal plate body with a set rectangular shape; S2, coating photoresist on the surface of the metal plate body in the non-grid line groove slurry tank area, then exposing and developing to protect the area not to be etched, so that the area to be etched is exposed, and each slurry tank with a set width and depth is etched by etching liquid; S3, then removing the photoresist from the metal plate body, and cleaning and drying the metal plate body; S4, stretching the net, and obtaining the slurry tank in the slurry tank area by laser cutting process, and each slurry tank completely corresponds to the width direction center area of the corresponding slurry tank to form a metal printing plate; S5, arranging the back of the metal printing plate upward, and hot pressing the PI film; S6, removing the non-higher layer part of the PI film by laser process, and only saving the higher layer area, wherein the laser power of the laser process only removes the PI film and has no effect on the metal printing plate.

3. A method of making a metal printing plate for solar screen printing according to claim 2, wherein: In step S5, the thickness of the PI film is 2-5 μm.

4. A method of making a metal printing plate for solar screen printing according to claim 3, characterized in that: The hot pressing process parameters of the PI film are 180-210 ℃, 30-40 kg of pressure and 20-30 min of pressing.

5. A method of making a metal printing plate for solar screen printing according to claim 2, wherein: In step S6, the width of the higher layer is less than the distance between the adjacent slurry tanks, and the width of the higher layer is located at the center position between the adjacent slurry tanks.

6. A metal printing plate for solar screen printing, which is obtained by the method for manufacturing a metal printing plate for solar screen printing according to any one of claims 1 to 5, characterized in that: The metal plate body is provided with a grid line area for silk screen printing in the center area, and a plurality of groups of parallel and spaced grid line grooves are arranged in the grid line area, each grid line groove is arranged through the thickness direction of the metal plate body, the grid line groove comprises an upper slurry tank and a lower slurry tank, the width of the slurry tank is greater than the width of the slurry tank, the width and length of the slurry tank correspond to the shape and size of the preset printing circuit, and a lower higher layer of PI film is arranged in the spacing area between the adjacent slurry tanks in the grid line area of the metal plate body.

7. A metal printing plate for solar screen printing according to claim 6, characterized in that: The metal plate body is made of 304 stainless steel or 316 stainless steel, and the thickness of the metal plate body is 10-200 μm.

8. A metal printing plate for solar screen printing according to claim 6, characterized in that: The width of the slurry tank is 20-200 μm, and the depth of the slurry tank is 5-15 μm less than the thickness of the metal plate body.

9. A metal printing plate for solar screen printing according to claim 8, characterized in that: The width of the slurry tank is 5-20 μm, the depth of the slurry tank is 5-15 μm, and the sum of the depth of the slurry tank and the depth of the slurry tank is equal to the thickness of the metal plate body.

10. A metal printing plate for solar screen printing according to claim 6, characterized in that: The thickness of the higher layer is 2-5 μm, and the width of the higher layer is 0.5-0.9 times the spacing distance between the adjacent slurry tanks.

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