阅读说明：本技术 一种无网结斜网网版的制版工艺及其网版 (Plate making process of non-net-knot inclined-net screen plate and screen plate thereof ) 是由 徐志明 吴冬 于 2020-05-22 设计创作，主要内容包括：本发明提供了一种无网结斜网网版的制版工艺,包括下列工序：工序S1：编织网纱并进行裁切,网纱中经线固定至纺机上,纬线在各个经线之间穿梭,纬线排布时预留出间隙,拉扯纬线使得经线和纬线之间形成斜角：工序S2：制作基础的承载网网版；工序S3：粘接网纱至承载网网版上；工序S4：在网纱上制作感光胶膜层；工序S5：贴合菲林膜片,菲林膜片中对应细栅线的遮挡线条处在工序S1中预留的间隙内,且遮挡线条平行于纬线；工序S6：曝光显影；工序S7：检测。在工序S1中预留出和遮挡线条对应的间隙,并调整该间隙内经线的角度,从而达到传统斜网的使用效果,并且避免对网纱进行裁切抽取,保证网纱的完整性,降低网版爆版的概率。(The invention provides a plate making process of a mesh-knot-free inclined screen printing plate, which comprises the following procedures: step S1: weave the grenadine and cut, warp is fixed to the frame in the grenadine, and weft shuttles between each warp, reserves the clearance when weft arranges, drags weft and makes and form the oblique angle between warp and the weft: step S2: manufacturing a basic bearing net plate; step S3: bonding the gauze to the bearing screen plate; step S4: manufacturing a photosensitive film layer on the gauze; step S5: laminating the film membrane, wherein the shielding lines corresponding to the thin grid lines in the film membrane are positioned in the gaps reserved in the step S1, and the shielding lines are parallel to the weft; step S6: exposing and developing; step S7: and (6) detecting. Reserve in process S1 and shelter from the corresponding clearance of lines to warp' S angle in the adjustment clearance, thereby reach the result of use of traditional inclined wire netting, and avoid cutting the gauze and extract, guarantee the integrality of gauze, reduce the probability that the version was exploded to the half tone.)

1. A plate making process of a mesh-free inclined screen printing plate is characterized in that: comprises the following procedures:

step S1: weaving and cutting a gauze, fixing warp yarns in the gauze onto a spinning machine, enabling weft yarns to shuttle among the warp yarns along with a shuttle, enabling the distance between two weft yarns needing printing of the silver yarns on the gauze to be multiple times of the distance between adjacent weft yarns in other areas according to the arrangement condition of the printing silver yarns when the weft yarns are arranged, and enabling the warp yarns and the weft yarns between the two weft yarns needing printing of the silver yarns on the gauze to form oblique angles;

step S2: manufacturing a basic bearing net plate;

step S3: bonding the gauze to the bearing screen plate;

step S4: manufacturing a photosensitive film layer on the gauze;

step S5: laminating a film membrane, wherein a shielding line corresponding to the printed silver wire in the film membrane is positioned at a position where the distance between adjacent wefts is larger in the step S1, and the shielding line is parallel to the wefts;

step S6: and (5) exposing and developing.

2. The plate making process of the non-net-knot inclined net plate as claimed in claim 1, characterized in that: in the step S1, the spacing between the two weft yarns of the screen on which the silver lines are to be printed is 100 to 200 micrometers, the spacing between the weft yarns of the other regions of the screen is 50 ± 10 micrometers, and the oblique angle formed between the warp yarns and the weft yarns of the two weft yarns on which the silver lines are to be printed is 22.5 ° to 30 °.

3. The plate making process of the non-net-knot inclined net plate as claimed in claim 1, characterized in that: in the step S2, the carrier net is bonded to the frame by the AB glue, and the carrier net is cut along the edge of the frame to form the basic carrier net screen plate.

4. The plate making process of the non-net-knot inclined net plate as claimed in claim 1, characterized in that: in the step S3, through holes having a size larger than that of the mesh are formed in the carrier net, and the mesh is bonded to the through holes by hot dry glue.

5. The plate making process of the non-net-knot inclined net plate as claimed in claim 1, characterized in that: in the step S4, the photosensitive resist is applied to the capillary film, the capillary film is attached to the gauze, and the photosensitive resist is left on the gauze to form a photosensitive resist layer after the capillary film is separated from the gauze, wherein the thickness of the photosensitive resist layer is between 5 micrometers and 10 micrometers.

6. The plate making process of the non-net-knot inclined net plate as claimed in claim 1, characterized in that: in the step S5, the distribution of the wefts is obtained by scanning the gauze microscopically, the shielding lines in the film sheet are adjusted according to the wefts until the shielding lines are parallel to the wefts, and the film sheet is fixed to the gauze in a grid-comparing manner.

7. The plate making process of the non-net-knot inclined net plate as claimed in claim 6, characterized in that: in the step S5, at least three positioning points are determined on the gauze, and the film sheet is fixed to the gauze by penetrating the positioning points and the film sheet through the needle.

8. The plate making process of the non-net-knot inclined net plate as claimed in claim 1, characterized in that: in the step S6, the screen plate is set in an exposure machine, and the power of a UV lamp in the exposure machine is adjusted to 0.5mj/cm²To 1mj/cm²The exposure time of the screen is controlled to be between 60s and 90 s.

9. The plate making process of the non-net-knot inclined net plate as claimed in claim 1, characterized in that: further comprises a re-sunning step, wherein the specific re-sunning condition is that the output power of the UV lamp is adjusted to 0.5mj/cm²To 1mj/cm²The exposure time is controlled between 60s and 90 s.

10. A screen produced by the plate making process of the non-mesh slant-screen printing plate of any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of printing, in particular to a plate making process of a mesh-knot-free inclined screen printing plate and a screen plate thereof.

Background

With the further improvement of the photovoltaic cell, the requirement of the grid line spacing on the cell plate is further increased, for example, a selective diffusion cell, abbreviated as SE cell, as shown in fig. 1, when such a cell is produced, it is required to print silver wires corresponding to silver electrodes in a laser scanning area 108 on an N source in a PN junction in a cross printing process, the equal spacing requirement of the silver wires at the position is very high, meanwhile, when printing, a mesh node (the mesh node refers to a crossing position of warps and wefts in a mesh) in a screen printing plate will block the silver paste, resulting in a decrease of ink permeability during printing, and in order to avoid the influence on ink permeability during printing, when the screen printing plate is manufactured, the mesh node corresponding to an ink permeability path is often selected to be cut off and extracted by a laser method to extract the warps or wefts, thereby eliminating the influence of the mesh node on the printing process, so that only warps or wefts are left at the ink permeability, and the integrity of the meshes at the ink permeability is damaged, the strength is reduced, and the phenomenon of plate explosion is easy to occur.

Disclosure of Invention

The invention provides a plate making process of a mesh-knot-free inclined screen plate and a screen plate thereof, which can prevent the screen gauze of the screen plate from exploding.

The technical scheme adopted by the invention for solving the technical problems is as follows: a plate making process of a non-net-knot inclined net plate comprises the following procedures:

step S1: weaving and cutting a gauze, fixing warp yarns in the gauze onto a spinning machine, enabling weft yarns to shuttle among the warp yarns along with a shuttle, enabling the distance between two weft yarns needing printing of the silver yarns on the gauze to be multiple times of the distance between adjacent weft yarns in other areas according to the arrangement condition of the printing silver yarns when the weft yarns are arranged, and enabling the warp yarns and the weft yarns between the two weft yarns needing printing of the silver yarns on the gauze to form oblique angles;

step S2: manufacturing a basic bearing net plate;

step S3: bonding the gauze to the bearing screen plate;

step S4: manufacturing a photosensitive film layer on the gauze;

step S5: laminating a film membrane, wherein a shielding line corresponding to the printed silver wire in the film membrane is positioned at a position where the distance between adjacent wefts is larger in the step S1, and the shielding line is parallel to the wefts;

step S6: and (5) exposing and developing.

Further, in the process S1, the pitch between the two weft threads of the mesh yarn on which the silver lines are to be printed is 100 to 200 micrometers, the pitch between the weft threads of the other regions of the mesh yarn is 50 ± 10 micrometers, and the oblique angle formed between the warp threads and the weft threads between the two weft threads of the mesh yarn on which the silver lines are to be printed is 22.5 ° to 30 °.

Further, in the step S2, the carrier web is adhered to the frame by the AB glue, and the carrier web is cut along the edge of the frame to form the basic carrier web plate.

Further, in the step S3, through holes having a size larger than that of the mesh are formed in the carrier net, and the mesh is bonded to the through holes by hot dry glue.

Further, in the step S4, the photosensitive resist is applied to the capillary film, the capillary film is attached to the gauze, the photosensitive resist is left on the gauze after the capillary film is separated from the gauze to form a photosensitive resist layer, and the thickness of the photosensitive resist layer is between 5 micrometers and 10 micrometers.

Further, in the step S5, the distribution of the wefts is obtained by scanning the gauze microscopically, the shielding lines in the film sheet are adjusted according to the wefts until the shielding lines are parallel to the wefts, and the film sheet is fixed to the gauze in a grid-specific manner.

Further, in the step S5, at least three positioning points are determined on the gauze, and the film sheet is fixed to the gauze by penetrating through the positioning points and the film sheet by a needle.

Further, in the step S6, the screen plate was set in the exposure machine, and the power of the UV lamp in the exposure machine was adjusted to 0.5mj/cm²To 1mj/cm²The exposure time of the screen is controlled to be between 60s and 90 s.

Further, the method also comprises the step of solarization, wherein the specific solarization condition is that the output power of the UV lamp is adjusted to 0.5mj/cm²To 1mj/cm²The exposure time is controlled between 60s and 90 s.

The invention also comprises a screen printing plate prepared by the plate making process of the mesh-knot-free inclined screen printing plate.

The method has the advantages that the weft gaps corresponding to the shielding lines can be provided through the reserved gaps in the process S1, oblique angles are formed between the warps and the wefts through adjusting the directions of the warps in the weft gaps, the shielding lines are placed in the reserved gaps in parallel to the wefts in the process S5, oblique angles are formed between the ink penetrating paths generated by exposure and development and the scrapers, when the silver paste is scraped by the scrapers, the warps can obliquely intercept partial silver paste, compared with the traditional vertical warps and wefts, the ink penetrating performance is higher, meanwhile, when the gauze is manufactured, a certain part in the gauze is not cut, the integrity of the gauze can be ensured, the strength of the gauze is ensured, and the probability of plate explosion during use is reduced.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a partial schematic view of an SE battery applied in the prior art;

FIG. 2 is a flow chart of a platemaking process of the invention;

FIG. 3 is a schematic view of the construction of a screen yarn according to the present invention;

FIG. 4 is a schematic view of a screen printing plate according to the present invention;

in the figure: laser scanning area-108, gauze-101, warp-102, weft-103, shading line-104, bearing net-105 and net frame-106.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.

Referring to fig. 2-4, the present invention provides a plate making process for a non-mesh inclined screen printing plate, comprising the following steps:

step S1: the gauze 101 is woven and cut. Each warp 102 is fixed on the textile machine, and the weft 103 is guided by the shuttle to shuttle between each warp 102, thereby forming the gauze 101. When the wefts 103 are arranged on the warps 102, the distance between every two wefts 103 is controlled according to a printed pattern and corresponds to a silver line on the SE battery, specifically, when the shuttle moves to a position corresponding to the silver line on the SE battery, namely, a position of the shielding line 104, the moving distance of the shuttle is expanded by a certain multiple, for example, the distance between the common gaps between the wefts 103 is X, the distance between two adjacent wefts 103 corresponding to the silver line is expanded to 2X to 4X, the size of the cutting plate is adjusted according to the size of the battery plate after the gauze 101 is woven into the gauze, and the length and the width of the cut gauze 101 are both greater than 1cm to 3cm of the battery plate. Adjusting the relative angle of the warp 102 at the larger clearance of the weft 103 to be 22.5 degrees to 30 degrees, specifically, pulling the warp 102 between two wefts 103 needing printing silver wires on the gauze 101 to form an oblique angle between the warp 102 and the weft 103, under the traction of the weft 103, gradually changing the angle of the warp 102 at the larger clearance relative to the weft 103 until the warp 102 in the clearance deflects by an angle of 22.5 degrees to 30 degrees, and then sequentially pulling the corresponding wefts 103 along the direction of the warp 102 to ensure that the wefts 103 at both sides of the common clearance are still perpendicular to the warp 102.

Step S2: a basic screen 105 of the carrier web is produced. As shown in fig. 4, the carrier net 105 is bonded to the frame 106 by an adhesive such as an AB compound adhesive to form a basic carrier net 105, and the elasticity of the carrier net 105 itself is reduced by pushing. Specifically, glue A is coated on the bearing net 105, glue B is coated on the net frame 106, when the net frame 106 is attached to the bearing net 105, the glue A and the glue B are mixed with each other to form composite glue with strong adhesive force, the net frame 106 is fixed on the bearing net 105 through the composite glue, the bearing net 105 is cut along the edge of the net frame 106 to form a basic bearing net 105 screen, the bearing net 105 screen is installed in a frame jacking machine, the bearing net 105 screen is pushed and propped for about 30 times through the frame jacking machine, the propping height is 5cm to 10cm, and the elasticity of the bearing net 105 is reduced. The bearing net 105 is made of PVC, PP or PS and other high polymer synthetic materials, the net frame 106 is made of light aluminum alloy, the AB glue is two-liquid mixed hardened glue, the A glue is the original glue, the B glue is a hardening agent, and the ratio of the B glue to the A glue is 1: and 5, the glue A is hardened, so that the carrying net 105 and the net frame 106 can be bonded.

Step S3: the screen 101 is bonded to the screen of the carrier web 105. A rectangular through hole is cut in the center of the carrier web 105, and the gauze 101 is fixed to the opening of the through hole by hot dry glue. Specifically, the length and width of a through hole cut in the bearing net 105 are all larger than the length and width of a battery pole plate, the length and width of the through hole are smaller than the length and width of the gauze 101, hot dry glue corresponding to the gauze 101 is coated near a through hole opening of the bearing net 105, the gauze 101 is laid on the bearing net 105 in parallel through holes, the gauze 101 is preliminarily adhered to the bearing net 105 through the hot dry glue, a screen printing plate of the bearing net 105 adhered with the gauze 101 is placed in a temperature environment of 100 ℃ to 200 ℃, the temperature is heated for about 10 minutes, the hot dry glue is completely hardened, and the gauze 101 is fixed on the bearing net 105.

Step S4: a photosensitive resist film layer is formed on the screen 101. The photosensitive glue is prepared by mixing distilled water and a photosensitizer (such as sodium diazide stilbene disulfonate and the like) and then adding a glue solution, the photosensitive glue is firstly coated on a capillary film, the capillary film carrying the photosensitive glue is attached to the gauze 101, the photosensitive glue can be adsorbed by the meshes of the gauze 101 under the capillary action until a photosensitive glue film layer is formed on the gauze 101, then the capillary film can be torn and lifted, and the photosensitive glue film layer is rolled, so that the surface of the photosensitive glue film layer is parallel to the gauze 101, and the operation is repeated until the thickness of the photosensitive glue film layer reaches 5-10 micrometers.

Step S5: and (5) attaching a film sheet. As shown in fig. 3, a corresponding film is designed and manufactured according to a printed silver line, positioning points are arranged on the gauze 101, and the film is fixed on the photosensitive adhesive film layer through the positioning points. Specifically, when the film membrane is designed, a corresponding shielding line 104 is designed corresponding to the gap between the upper wefts 103 of the gauze 101 and the enlarged space. The distribution situation of the spacing between the wefts 103 in the gauze 101 is determined by means of micro scanning of the gauze 101, the distribution situation of the positioning points relative to the wefts 103 is scanned and reflected to a display terminal, the distribution situation of the positioning points is displayed when the film membrane is manufactured, the position and the shape of a shielding line 104 in the film membrane are adjusted according to the distribution situation of the spacing between the wefts 103, so that the shielding line 104 is parallel to the wefts 103 and is positioned between two wefts 103 with a larger spacing between the wefts 103, and the film membrane is positioned and fixed on the gauze 101 in a needle-threading fixing, adhesive tape bonding or gluing mode at the positioning points.

Step S6: and (5) exposing and developing. The photosensitive glue film layer is solidified by the UV lamp irradiation mode, and uncured photosensitive glue shielded by the lines on the film is diluted and washed away by the water washing mode. Specifically, a screen printing plate with a film membrane is arranged in an exposure machine, a UV lamp irradiates a photosensitive glue film layer on the screen printing plate in a parallel diffusion mode, and the output power of the UV lamp is adjusted to 0.5mj/cm²To 1mj/cm²And the exposure time is controlled to be between 60s and 90s, the photosensitive adhesive film layer absorbs the ultraviolet energy emitted by the UV lamp, and the layer-by-layer curing is started from the direction close to the UV lamp until the photosensitive adhesive film layer is completely cured on the gauze 101. In the process of UV lamp irradiation, due to the filtration of the film membrane, the shielding lines on the film membrane absorb ultraviolet rays, so that part of the photosensitive emulsion is not cured, and finally, the uncured photosensitive emulsion is diluted and washed away in a distilled water spreading mode to form the final silk screen printing plate.

Step S7: and (6) detecting. Whether the width of a gap in the photosensitive film layer is qualified or not and whether the phenomenon such as air bubbles appears in the photosensitive film layer or not are detected in a visual inspection or trial printing mode, if the detection is qualified, the film diaphragm is taken down, and if the detection is unqualified, the film diaphragm is repaired or reworked in a targeted mode.

The above steps may further comprise a re-sunning, wherein the specific re-sunning condition is that the output power of the UV lamp is adjusted to 0.5mj/cm²To 1mj/cm²The exposure time is controlled between 60s and 90 s.

Through the silk screen version of above-mentioned technology preparation, the ink penetrating path in the photosensitive glue film layer is on a parallel with weft 103 direction of gauze 101, 22.5 to 30 contained angles have between warp 102 of slope in ink penetrating path and the gauze 101, in the in-process of printing, the scraper slides along weft 103 direction of gauze 101, silver thick liquid is when passing through the ink penetrating path, warp 102 intercepts silver thick liquid, thereby control the height of silver line, and angle between warp 102 and the scraper can make the width that silver thick liquid formed thin grid line even, it is specific, because the warp 102 interception of slope, burr and the oblique angle that the size equals between the thin grid line that produces during the thin grid line that silver thick liquid formed, through silver thick liquid surface tension and silver thick liquid self adsorption, can make the burr fuse in the silver thick liquid, and then make thin grid line width even, thereby can reach the equidistant requirement of thin grid line. And reserve the mode of ink penetrating route through the mode of arranging of adjustment weft 103, enlarge the interval that shelters from between lines 104 department weft 103 promptly and can guarantee the integrality of gauze 101, avoid appearing the cracked phenomenon of steel wire in gauze 101 to improve the intensity of gauze 101, reduce the probability of exploding the version, and improve the life of half tone.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.