CN111806060B - Method for removing screen by etching screen - Google Patents
Method for removing screen by etching screen Download PDFInfo
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- CN111806060B CN111806060B CN202010656843.2A CN202010656843A CN111806060B CN 111806060 B CN111806060 B CN 111806060B CN 202010656843 A CN202010656843 A CN 202010656843A CN 111806060 B CN111806060 B CN 111806060B
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- screen
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- printing plate
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- screen printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/14—Forme preparation for stencil-printing or silk-screen printing
- B41C1/147—Forme preparation for stencil-printing or silk-screen printing by imagewise deposition of a liquid, e.g. from an ink jet; Chemical perforation by the hardening or solubilizing of the ink impervious coating or sheet
Abstract
The invention discloses a method for removing screen wires by etching a screen printing plate, which comprises the following steps: fully standing the screen printing plate, and scanning the screen of the screen printing plate by using a visual scanning device to obtain a screen image of the screen printing plate; comparing the screen printing screen image with the standard fine grid image of the battery piece, and etching and marking the screen which is overlapped with the fine grid line of the standard fine grid image of the battery piece on the screen printing screen image to obtain a screen printing screen etching and marking image; covering a protective material on the surface of the silk screen of the screen printing plate to obtain an etched printing plate; according to the screen printing plate silk screen etching mark picture, removing the protective material of the etching printing plate corresponding to the marked screen printing plate to obtain an etching plate; placing the etching plate in etching solution for etching treatment, and etching off the exposed screen wires to obtain an etched screen plate; and (4) placing the etched screen printing plate in a cleaning solution for cleaning, and removing the protective material on the surface of the cleaned screen printing plate and the etched and broken screen printing plate to obtain a semi-finished product of the screen printing plate without the screen knots.
Description
Technical Field
The invention belongs to the technical field of screen printing plate manufacturing, and particularly relates to a method for removing meshes by etching a screen printing plate.
Background
The screen printing is one of the important processes for producing the crystalline silicon cell, and the basic principle is that the designed pattern is transferred to a silicon chip by conductive slurry through a screen plate under the action of a scraper; the screen printing mainly aims to prepare a fine circuit on the surface of a silicon wafer, collect photon-generated carriers and lead the carriers out of a cell, namely to form the anode and the cathode of a crystalline silicon solar cell. The silk screen of the screen printing plate is formed by interweaving warps and wefts, cross points of the warps and the wefts are called as net knots, and the appearance of the net knots can influence the ink penetration amount and the printing flatness. Therefore, in order to reduce the influence of the screen knots on printing, the crystalline silicon cell printing screen plate which is frequently used in the market at present is a screen knot-free screen plate.
The existing screen printing plate process without the mesh knots generally adopts a customized wire mesh for wire drawing or a method for cutting and drawing the wire mesh by laser, but the wire drawing quantity is large, the heat influence of laser cutting is added, the strength of the wire mesh is reduced, and the service life of the screen printing plate is influenced.
For the screen printing plate formed by interweaving different metal silk threads, if the warp threads are made of stainless steel and the weft threads are made of tungsten steel, CN201810477662.6 provides an etching solution which can etch the tungsten steel without influencing or slightly influencing the stainless steel and can play a role in selectively removing the silk threads. However, this technique can only work with a special screen plate made of interlaced metal threads, more precisely, can only remove the tungsten steel portion of a screen plate made of tungsten steel and stainless steel threads, and cannot work with a screen plate made of a single material, such as a stainless steel screen plate, which is more common in screen printing, and the application range is limited, and the practicability is low.
The above description is included in the technical recognition scope of the inventors, and does not necessarily constitute the prior art.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a method for removing a mesh by etching a screen, which can remove a mesh woven from any mesh by etching, thereby reducing nodes on the screen, avoiding loss of strength of the mesh, prolonging the service life of the screen, removing a mesh woven from a single material into the screen, and removing a mesh woven from a plurality of materials, and has the advantages of wide application range, high production efficiency, and high practicability.
In order to achieve the purpose, the invention provides a method for removing screen wires by etching a screen printing plate, which comprises the following steps:
s1: fully standing the screen printing plate, and scanning the screen of the screen printing plate by using a visual scanning device to obtain a screen image of the screen printing plate;
s2: comparing the screen printing screen image with the standard fine grid image of the battery piece, and etching and marking the screen which is overlapped with the fine grid line of the standard fine grid image of the battery piece on the screen printing screen image to obtain a screen printing screen etching and marking image;
s3: covering a protective material on the surface of the screen mesh of the screen printing plate, and enabling the protective material to wrap all the screen meshes of the screen printing plate to obtain an etched printing plate;
s4: according to the screen printing plate silk screen etching marking pattern, removing the protective material on the etching printing plate corresponding to the marked silk screen, and opening an etching opening for exposing the marked silk screen to obtain an etching plate;
s5: placing the etching plate in etching solution for etching treatment, and etching off the exposed screen wires to obtain an etched screen plate;
s6: and (4) placing the etched screen printing plate in a cleaning solution for cleaning, and removing the protective material on the surface of the cleaned screen printing plate and the etched and broken screen printing plate to obtain a semi-finished product of the screen printing plate without the screen knots.
In one example, the etching mark in step S2 is performed by marking a plurality of dot-shaped or linear etching opening marks on the overlapping portion of the mesh overlapping the fine grid line, and the plurality of etching opening marks are spaced and marked on two sides of the mesh perpendicular to the mesh overlapping the fine grid line along the extending direction of the mesh overlapping the fine grid line.
In one example, the protective material is a photosensitive material, and the step S3 specifically includes the following steps:
s3.1: covering photosensitive materials on the surfaces of the two sides of the screen mesh of the screen plate, so that the protective materials wrap all the screen meshes of the screen plate;
s3.2: converting the screen etching mark diagram of the screen into a film diagram;
s3.3: and pasting the film picture on the surface of the screen mesh of the screen printing plate, and exposing the screen printing plate to obtain the etching printing plate.
In one example, in step S4, the photosensitive material corresponding to the unmarked mesh on the etched printing plate is exposed and left on the screen to form a protective layer by placing the etched printing plate in a developer for development, and the photosensitive material corresponding to the marked mesh is developed without exposure to form etched openings exposing the marked mesh.
In one example, the protective material is a polymer film, and in step S3, the polymer film is coated on both side surfaces of the screen printing screen by a bonding/hot pressing method.
In one example, in step S4, according to the halftone screen etching mark pattern, the protective material on the etched printing plate corresponding to the marked screen is removed by laser cutting, so as to form etching openings exposing the marked screen.
In one example, the protective material used in step S3 and the etching solution used in step S5 are selected according to the screen material of the screen.
In one example, the cleaning solution used in the step S6 is selected according to the protective material used in the step S3.
In one example, further comprising step S7: and (3) degreasing the semi-finished product of the screen printing plate without the net knots, washing the semi-finished product of the screen printing plate without the net knots, cleaning and removing the residual etched and broken meshes on the surface of the meshes, and finally drying the semi-finished product of the screen printing plate without the net knots.
The method for removing the screen by etching the screen printing plate provided by the invention can bring the following beneficial effects:
1. by comparing the screen image of the screen printing plate with the standard fine grid image of the battery piece, the screen wires overlapped with the fine grid lines can be clearly and visually found, the etching openings are marked on the screen printing plate screen by covering the protective material, the screen wires needing etching are accurately exposed, the etching positions are accurately positioned, the screen wires are removed from the screen plate woven by any screen wires by a precise etching process, the purpose of reducing nodes on the screen printing plate is achieved, the fine grids of the standard pattern of the battery piece can be uniformly distributed in the middle of the grids of the processed non-network-junction screen printing plate, the using effect of the non-network-junction screen printing plate is ensured, and the market competitiveness of the non-network-junction screen printing plate is improved; the screen wires are not required to be removed in a wire drawing or laser cutting mode, the heat influence of laser cutting is avoided, the loss of the strength of the screen wires is avoided, the service life of the screen printing plate is prolonged, and the influence of the processing time of laser equipment is avoided; and effectively prevent to etch the mesh that the damage does not overlap, guarantee the result of use of no net knot half tone, need not etch warp or weft selectively through selecting etching solution, can get rid of the mesh that becomes the half tone by single material, also can get rid of the mesh that becomes the half tone by multiple material, operation simple to use is convenient, and application scope is wider, and production efficiency is high, and the practicality is strong, is fit for popularizing and applying.
2. The marked part of the mesh material is exposed, the rest part of the mesh material still retains the protective material, only the marked part of the material can be etched when the subsequent mesh is placed in the etching solution, and the rest part of the material is retained, so that the mesh-free screen printing plate which is further processed and finished subsequently can ensure that the fine grids of the standard patterns of the battery cell can be uniformly distributed in the middle of the meshes of the mesh-free screen printing plate, and the mesh-free screen printing plate has a wide application range and is suitable for popularization and application.
3. Because the part that is not marked has the protection material protection, is exposed the net silk material by the mark part, the etching solution can directly etch the net silk that exposes, cuts off the net silk, and operation convenient to use improves machining efficiency, uses the etching solution to etch the net silk, need not the drawing to influence the bulk strength of silk screen, guarantee the life of half tone, the practicality is strong, is fit for popularizing and applying.
4. The etching solution can be prepared into etching solutions with different concentrations and different types according to different mesh materials, and is wide in application range, flexible to use, high in practicability and suitable for popularization and application.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of marking an etched opening on a screen;
fig. 2 is a schematic diagram of the etched half-finished product of the screen without mesh knots.
In the figure, 1-screen printing plate, 11-screen wire, 2-etching mark and 3-fine grid line
Detailed Description
In order to more clearly explain the overall concept of the invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "central," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the indicated orientations and positional relationships based on the drawings for ease of description and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. In the description of the present specification, reference to the description of the terms "one aspect," "some aspects," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the aspect or example is included in at least one aspect or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same solution or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more aspects or examples.
As shown in fig. 1 and fig. 2, a method for removing a mesh by screen etching according to the present invention includes the following steps:
s1: and fully standing the screen 1, and scanning the screen of the screen 1 by using a visual scanning device to obtain the screen image of the screen.
Through fully stewing half tone 1, can release half tone screen's stress, make half tone 1's size stable, effectively prevent that the silk screen image of the half tone 1 that the scanning obtained from warp and appear the error, improve the scanning image precision, the practicality is strong. The sufficient standing means that the screen plate 1 is allowed to stand at a constant temperature for 24 hours or more to stabilize the tension of the screen plate 1.
The scanning error of vision scanning equipment is less than or equal to 2 mu m, and the repeatability is less than or equal to 2 mu m, is equivalent to the size of half a silk screen net, and the half a silk screen net image that the scanning detected is more clear accurate, and the precision is high, and the error rate is little, is favorable to improving the accuracy and the accuracy that the analysis was compared and was marked the etching map, and processing is more accurate, is favorable to promoting the result of use of no net knot half tone, and the practicality is strong, is fit for popularizing and applying.
S2: and comparing the screen image with the standard fine grid image of the battery piece, and etching and marking the screen 11 on the screen image, which is overlapped with the fine grid lines 3 of the standard fine grid image of the battery piece, to obtain an etching and marking image of the screen.
Through comparing half tone screen silk screen image and the thin bars image of battery piece standard, can discover the part that half tone screen silk screen image and the thin grid line of battery piece standard overlap mutually more directly perceivedly to the accurate mark that etches carries out improves the machining precision, can contrast with the battery piece of different grade type moreover, guarantees that the thin bars of battery piece can distribute uniformly in the middle of the net of no net knot half tone, and application scope is wide, and the practicality is strong, is fit for popularizing and applying.
The etching mark is specifically to mark a plurality of dot-shaped or linear etching opening marks 2 on the overlapping portion of the mesh wires 11 overlapping with the fine gate lines 3, and the plurality of etching opening marks 2 are marked at two sides of the mesh wires 11 perpendicular to the mesh wires 11 overlapping with the fine gate lines 3 at intervals along the extending direction of the mesh wires 11 overlapping with the fine gate lines 3. By forming the dot-shaped or linear etching opening marks 2 on the mesh wires 11 to be removed, the materials of the mesh wires 11 can be accurately exposed one by one according to the mesh wires 11 overlapped by the fine grid lines 3, the etching positions are accurately positioned, the etching liquid only etches the exposed dot-shaped or linear mesh wires 11 to cut off the mesh wires 11, and the cut mesh wires 11 can fall off from the screen printing plate 1 in the subsequent cleaning and degreasing process, so that the required pattern is formed on the screen printing plate 1, and the processing is more accurate; avoided exposing the warp and the weft of silk screen simultaneously, effectively prevent the etching and harm non-overlapping net silk 11, effectively guarantee the result of use of no net knot half tone, need not etch warp or weft selectively through selecting the etching solution, warp and weft can be different materials, also can be same material, the etching can get rid of the net silk 11 that makes into half tone 1 by single net silk 11 material, also can get rid of the net silk 11 that makes into half tone 1 by multiple net silk 11 material, application scope is wider, therefore, the clothes hanger is strong in practicability, and is suitable for popularization and application.
S3: and covering a protective material on the surface of the screen 1, and enabling the protective material to wrap all the screen wires 11 of the screen 1 to obtain the etched printing plate.
The protective material covers the surface of the screen printing plate 1, has the function of resisting etching liquid corrosion, wraps the screen 11, can protect the screen 11 from being corroded by the etching liquid, ensures the strength of the screen printing plate 1, and ensures the use effect of the screen printing plate without net knots.
Wherein, according to the mesh 11 material of the screen 1, a protective material is selected; the protective material can be a photosensitive material with photosensitive characteristics, including liquid photosensitive materials such as photosensitive glue, photosensitive etching resist and the like, and film-shaped photosensitive materials such as photosensitive dry films; the protective material may be a polymer material having no photosensitive property, such as a polymer film. Different protective materials are selected according to different mesh wires 11, etching solutions with different concentrations and different components are correspondingly adjusted, the use is convenient and flexible, the application range is wider, the practicability is high, and the method is suitable for popularization and application.
When the protective material is a photosensitive material, the preparation of the etched printing plate specifically comprises the following steps:
s3.1: covering photosensitive materials on the surfaces of the two sides of the silk screen of the screen printing plate 1, and enabling the protective materials to wrap all the silk screens 11 of the screen printing plate 1;
s3.2: converting the screen etching mark diagram of the screen into a film diagram;
s3.3: and (3) pasting the film picture on the surface of the screen 1, and exposing the screen 1 to obtain the etching printing plate.
The screen printing screen silk screen etching mark graph obtained through scanning analysis is converted into a film graph entity, the photosensitive material is used for covering the surface of the screen printing screen 1 for exposure, the film graph can shield part of the mark, so that the screen printing screen silk screen etching mark graph can be conveniently and quickly transferred to the surface of the screen printing screen 1 through the photosensitivity of the photosensitive material, the screen printing 11 needing etching is accurately marked, the marking quality is guaranteed, and the production efficiency is effectively improved; cover photosensitive material in silk screen both sides surface and expose, make the silk screen both sides can both obtain effective protection, further prevent that the silk screen 11 that the silk screen was not marked from receiving the etching damage, reduce the intensity loss of half tone 1, the result of use of reinforcing no net knot half tone, the life of extension half tone 1, the practicality is strong.
Wherein, the screen printing plate 1 can be put into an exposure machine for vacuum exposure, and the exposure effect is good; and after exposure, standing the screen printing plate 1 for ten minutes, and then removing the film picture attached to the surface of the screen printing plate 1.
When the protective material is a polymer film, the preparation of the etching printing plate is to cover the polymer film on the two side surfaces of the screen printing plate screen in a laminating/hot pressing mode. Can hug closely the macromolecular membrane in half tone silk screen both sides surface through laminating/hot pressing mode, the macromolecular membrane is difficult for producing the space with the silk screen surface, makes the silk screen both sides can both effectively be protected, further prevents that the silk screen 11 that is not marked by the silk screen from receiving the etching damage, reduces half tone 1's strength loss, strengthens the result of use of no net knot half tone, prolongs half tone 1's life, and the practicality is strong, is fit for popularizing and applying.
S4: and according to the screen silk screen etching marking pattern, removing the protective material corresponding to the marked silk screen 11 on the etching printing plate, and opening an etching opening exposing the marked silk screen 11 to obtain the etching plate.
The material of the marked part of the mesh 11 is exposed, the remaining part still retains the protective material, only the marked part of the material can be etched when the subsequent mesh is placed in the etching solution, and the remaining part is retained, so that the mesh-free screen printing plate which is further processed and finished subsequently can ensure that the fine grids of the standard patterns of the battery cell can be uniformly distributed in the middle of the meshes of the mesh-free screen printing plate, and the mesh-free screen printing plate has a wide application range and is suitable for popularization and application.
When the protective material is a photosensitive material, the etching plate is prepared by placing an etching printing plate in a developing solution for development, so that the photosensitive material on the etching printing plate corresponding to the unmarked mesh 11 is exposed and left on the screen mesh to form a protective layer, and the photosensitive material corresponding to the marked mesh 11 is not exposed and developed, thereby forming etching openings exposing the marked mesh 11.
The etching printing plate is put into a developing solution for developing, the exposed part of the photosensitive material forms a protective layer on the screen mesh of the screen, and the protective layer has the function of resisting the corrosion of the etching solution, can protect the screen mesh 11 from being corroded and corroded by the etching solution, ensures the strength of the screen 1 and ensures the using effect of the screen without the net knots; meanwhile, the etching opening is formed by using a photosensitive material for exposure and development, the mesh wire 11 of the marked part can be exposed, and the method is simple and convenient to operate, short in processing time, high in efficiency, low in cost and high in practicability. Exposing and developing to form dot-shaped or linear openings in the mesh 11 to be removed and expose the mesh 11 material
Wherein the developing solution is 1-3% of sodium carbonate solution. The developing solution with different concentrations can be modulated according to different photosensitive materials so as to achieve the developing effect required by a user, the use is convenient and flexible, the user requirements are met, the application range is wide, and the practicability is high.
When the protective material is a photosensitive material, the etching plate is prepared by removing the protective material corresponding to the marked screen 11 on the etching printing plate by using a laser cutting mode according to the screen etching mark pattern, and forming an etching opening exposing the marked screen 11. The laser cutting and etching method has the advantages of high cutting precision, small error rate, high practicability, suitability for popularization and application, capability of ensuring the accuracy of subsequent etching, simplification of processing technology, reduction of equipment use, improvement of production efficiency and use cost reduction, and suitability for popularization and application
S5: and placing the etching plate in etching solution for etching treatment, and etching the exposed screen wires 11 to obtain the etched screen plate.
Because the unmarked screen wires 11 are protected by the protective material, the marked screen wires 11 are exposed in the etching solution, the exposed screen wires 11 are etched and cut off under the action of the etching solution, the screen wires 11 of the screen printing plate 1 are cut off by a precise etching process, the screen printing plate 1 woven by any screen wires 11 can be removed, the purpose of reducing nodes on the screen printing plate 1 is achieved, the operation and the use are simple and convenient, the screen wires 11 are removed without using a wire drawing or laser cutting mode, the heat effect of laser cutting is avoided, the overall strength loss of the screen printing plate is avoided, the strength of the screen printing plate 1 is ensured, the service life of the screen printing plate 1 is prolonged, the influence of the processing time of laser equipment is avoided, the production and processing efficiency is effectively improved, the application range is wider, the practicability is strong, and the method is suitable for popularization and application.
The etching solution can be an acidic etching solution, such as a hydrogen peroxide-hydrochloric acid system, a copper chloride-sodium hypochlorite system, an iron chloride-hydrochloric acid system and the like; the etching solution can also be an alkaline etching solution, such as potassium ferricyanate-alkali and the like.
Wherein, the etching solution is selected according to the material of the mesh 11 and the protective material of the screen plate 1. Can be according to different mesh 11 materials of difference and the etching solution of different concentration and different types of protective material modulation to reach the required etching effect of user, through selecting protective material and etching solution, can realize getting rid of mesh 11 to the screen version 1 that any mesh 11 weaves, reach the effect that reduces the node on screen version 1, convenient to use is nimble, satisfies the user's demand, and application scope is wide, and the practicality is strong, is fit for popularizing and applying.
S6: and (3) placing the etched screen printing plate in a cleaning solution for cleaning, and removing the protective material on the surface of the cleaned screen printing plate and the etched and broken screen printing plate 11 to obtain a semi-finished product of the screen printing plate without the net knots.
Will remain on the silk screen and clear up by the disconnected net silk 11 of etching and the protective layer on silk screen surface, prevent to remain by the disconnected net silk 11 of etching and protective layer and influence the result of use of no net knot screen printing plate, promote the market competition of no net knot screen printing plate, the practicality is strong.
The protective material layer on the surface of the screen can be removed with water, solvent, acid, alkali, etc. Here, the cleaning liquid is selected based on the protective material used in step S3. The cleaning liquid with different concentrations and different types can be modulated according to different protective materials so as to achieve the cleaning effect required by a user, the use is convenient and flexible, the user requirements are met, the application range is wide, the practicability is high, and the cleaning liquid is suitable for popularization and application.
S7: and (3) degreasing the semi-finished product of the screen printing plate without the net knots, washing the semi-finished product of the screen printing plate without the net knots, cleaning and removing the residual etched and broken mesh wires 11 on the surface of the mesh wires, and finally drying the semi-finished product of the screen printing plate without the net knots. And then, coating, exposing and developing the semi-finished product of the screen printing plate without the net knots to obtain a finished product of the screen printing plate without the net knots.
Through carrying out degrease, washing, dry mode to no net knot half-finished product of half-finished screen board, will remain and clear up by the disconnected net silk 11 of etching on the silk screen, prevent to remain by the disconnected net silk 11 of etching and influence the result of use of no net knot screen board on the silk screen, promote the market competition of no net knot screen board, the practicality is strong.
According to the method for removing the meshes by etching the screen printing plate, the mesh 11 overlapped with the fine grid lines 3 can be clearly and visually found by comparing the screen printing plate mesh image with the standard fine grid image of the battery piece, the mesh 11 to be etched can be accurately exposed by covering the protective material and marking the etching opening on the screen printing plate mesh, the etching position is accurately positioned, the mesh 11 can be removed from the screen printing plate 1 woven by any mesh 11 through a precise etching process, the purpose of reducing the nodes on the screen printing plate 1 is achieved, the fine grids of the standard pattern of the battery piece can be uniformly distributed in the middle of the grids of the processed non-network-junction screen printing plate, the using effect of the non-network-junction screen printing plate is ensured, and the market competitiveness of the non-network-junction screen printing plate is improved; the screen 11 is not required to be removed in a way of drawing or laser cutting, the thermal influence of laser cutting is avoided, the loss of the screen strength is avoided, the service life of the screen 1 is prolonged, and the influence of the processing time of laser equipment is avoided; and effectively prevent to etch the mesh 11 that the damage does not overlap, guarantee the result of use of no net knot half tone, need not selectively etch warp or weft through selecting etching solution, can get rid of and make into the mesh 11 of half tone 1 by single material, also can get rid of and make into the mesh 11 of half tone 1 by multiple material, operation simple to use is convenient, and application scope is wider, and production efficiency is high, and the practicality is strong, is fit for popularizing and applying.
The method for removing the mesh by etching the screen printing plate, which is disclosed by the invention, is further explained by taking a steel wire screen printing plate as an example, and specifically comprises the following steps of:
s1: and standing the steel wire mesh plate for more than 24 hours under a constant temperature condition to ensure that the dimension of the steel wire mesh plate is stable, then completely scanning the longitude and latitude lines and grids of the wire mesh of the steel wire mesh plate by using high-precision vision scanning equipment to obtain a wire mesh image of the steel wire mesh plate, and exporting the image into a dxf document, thereby facilitating transmission.
S2: and importing the dxf document of the steel wire mesh screen image into drawing software, comparing the steel wire mesh screen image with the standard fine grid image of the battery piece through the drawing software, marking dotted etching openings on the derived dxf diagram file of the steel wire mesh screen image one by one according to the overlapped part of the mesh wires 11 and the fine grid lines 3, and marking a plurality of mesh wires 11 to be etched to obtain the dxf diagram file of the steel wire mesh screen etching marked diagram.
S3: removing the protective film on the side of the photosensitive dry film, spreading the photosensitive dry film with the thickness of 25 μm on the upper and lower surfaces of the steel wire screen plate, placing in a vacuum laminator at the temperature of 105 ℃ and the pressure of 4 KG/cm2Vacuumizing for 1 minute, namely, the pressing time is 1 minute, so that the photosensitive dry film is covered on the side surface of the silk screen of the steel silk screen plate; transferring the wire mesh etching mark diagram of the wire mesh plate into a film diagram, then pasting the film diagram on the surface of the photosensitive dry film, and carrying out vacuum absorption exposure for 10 minutes in an exposure machine; and (3) standing the steel wire mesh plate for 10 minutes after exposure, and then removing the protective film on the surface of the photosensitive dry film.
S4: and (3) placing the steel wire mesh plate in 1-3% sodium carbonate solution for developing, leaving the exposed part of the photosensitive dry film on the steel wire mesh plate to form a protective layer, developing the unexposed part to form a dot or linear etching opening to expose the mesh 11 material.
S5: etching the exposed mesh wire 11 material by using ferric chloride-hydrochloric acid or copper chloride-sodium hypochlorite etching solution to etch off the mesh wire 11;
s6: and (3) putting the steel wire mesh plate into 1-3% of sodium hydroxide solution for treatment, and stripping the photosensitive dry film on the surface of the steel wire mesh plate.
S7: and cleaning the steel wire mesh plate by using a surfactant solution, washing the surfactant on the steel wire mesh plate by using a water gun, washing away the residual etched and broken wires 11 on the steel wire mesh plate in the cleaning process, forming a required pattern on the steel wire mesh plate, and finally drying the steel wire mesh plate by using an air gun to form a semi-finished product of the non-net-knot screen plate.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (8)
1. A method for removing screen wires by screen etching comprises the following steps:
s1: fully standing the screen printing plate, and scanning the screen of the screen printing plate by using a visual scanning device to obtain a screen image of the screen printing plate;
s2: comparing the screen mesh image with the standard fine grid image of the battery piece, and etching and marking the mesh which is overlapped with the fine grid line of the standard fine grid image of the battery piece on the screen mesh image, specifically, marking a plurality of dot-shaped or linear etching opening marks on the overlapped part of the mesh which is overlapped with the fine grid line, and marking the plurality of etching opening marks on two sides of the mesh which is vertical to the mesh which is overlapped with the fine grid line at intervals along the extending direction of the mesh which is overlapped with the fine grid line to obtain a screen mesh etching and marking image;
s3: covering a protective material on the surface of the screen mesh of the screen printing plate, and enabling the protective material to wrap all the screen meshes of the screen printing plate to obtain an etched printing plate;
s4: according to the screen printing plate silk screen etching marking pattern, removing the protective material on the etching printing plate corresponding to the marked silk screen, and opening an etching opening for exposing the marked silk screen to obtain an etching plate;
s5: placing the etching plate in etching solution for etching treatment, and etching off the exposed screen wires to obtain an etched screen plate;
s6: and (4) placing the etched screen printing plate in a cleaning solution for cleaning, and removing the protective material on the surface of the cleaned screen printing plate and the etched and broken screen printing plate to obtain a semi-finished product of the screen printing plate without the screen knots.
2. The method for removing the screen by screen etching according to claim 1, wherein the protective material is a photosensitive material, and the step S3 specifically includes the following steps:
s3.1: covering photosensitive materials on the surfaces of the two sides of the screen mesh of the screen plate, so that the protective materials wrap all the screen meshes of the screen plate;
s3.2: converting the screen etching mark diagram of the screen into a film diagram;
s3.3: and pasting the film picture on the surface of the screen mesh of the screen printing plate, and exposing the screen printing plate to obtain the etching printing plate.
3. The method of claim 2, wherein in step S4, the photosensitive material on the etched printing plate corresponding to the unmarked mesh is exposed and left on the screen to form a protective layer by placing the etched printing plate in a developer for development, and the photosensitive material corresponding to the marked mesh is developed without exposure to form etched openings exposing the marked mesh.
4. The method for removing the screen by etching the screen according to claim 1, wherein the protective material is a polymer film, and in step S3, the polymer film is coated on both side surfaces of the screen by a bonding/hot pressing method.
5. The method of claim 4, wherein in step S4, the protective material corresponding to the marked screen on the etched printing plate is removed by laser cutting according to the screen etching mark pattern, so as to form etching openings exposing the marked screen.
6. The method of any one of claims 1 to 5, wherein the protective material used in step S3 and the etching solution used in step S5 are selected according to the screen material of the screen.
7. The method of claim 6, wherein the cleaning solution used in step S6 is selected according to the protective material used in step S3.
8. The method for screen-etching to remove the mesh according to any one of claims 1 to 5, further comprising step S7: and (3) degreasing the semi-finished product of the screen printing plate without the net knots, washing the semi-finished product of the screen printing plate without the net knots, cleaning and removing the residual etched and broken meshes on the surface of the meshes, and finally drying the semi-finished product of the screen printing plate without the net knots.
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| CN112455062A (en) * | 2020-11-13 | 2021-03-09 | 上海新倬壮印刷科技有限公司 | Mesh cloth processing method suitable for SE (net knot free) |
| CN112477388B (en) * | 2020-11-13 | 2023-03-31 | 上海新倬壮印刷科技有限公司 | Inclined-net non-net-knot screen printing plate and manufacturing method thereof |
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