Solar printing screen structure and method for making the same

Abstract

The application discloses a solar printing screen structure and a method for manufacturing the same. The solar printing screen structure comprises a printing layer and a guide layer, the guide layer and the printing layer are bonded integrally, the printing layer is provided with printing holes for main grid printing, the guide layer is provided with guide holes aligned with the printing holes, the guide holes are formed with a storage area for storing slurry, the side wall of the guide hole is located outside the side wall of the printing hole, and the distance between the side wall of the guide hole and the side wall of the printing hole gradually increases from one end of the guide hole to the other end. The solar printing screen structure effectively avoids the conditions of cavities, broken grids and virtual grid lines, and can change the scraping direction of the scraper according to needs to adjust the consumption of printing slurry and the printing thickness.

Description

Technical Field

[0001] This invention belongs to the field of solar panel printing screen technology, specifically a solar printing screen structure and its manufacturing method. Background Technology

[0002] As solar cells shift towards higher conversion efficiency, adaptability to complex environments, and lower cost, grid lines need to be developed towards finer, denser, and more structurally optimized lines.

[0003] On the one hand, the printing holes of traditional solar cell screen structures are often just fixed holes. When the squeegee pushes the paste, the paste needs to be squeezed from a large open space into the small printing holes. This will cause unstable pressure at the inlet, which can easily cause air bubbles to be drawn in, resulting in voids, broken grids, and poor grid lines after sintering.

[0004] On the other hand, paste consumption is a significant non-silicon cost of crystalline silicon solar cells, and the thickness of traditional screen printing is difficult to adjust, making it difficult to adjust paste consumption as needed. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing a solar-powered printing screen structure and its manufacturing method. This solar-powered printing screen structure effectively avoids voids, broken grids, and indistinct grid lines, and can adjust the printing paste consumption and printing thickness by changing the scraping direction of the squeegee as needed.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a solar printing screen structure, comprising a printing layer and a guiding layer, wherein the guiding layer and the printing layer are bonded together, the printing layer is provided with printing holes for main grid printing, the guiding layer is provided with guiding holes aligned with the printing holes, a hysteresis zone for storing paste is formed in the guiding holes, the sidewall of the guiding holes is located outside the sidewall of the printing holes, and the distance between the sidewall of the guiding holes and the sidewall of the printing holes gradually increases from one end of the guiding holes to the other end. This solar-powered printing screen structure features guide holes. When the squeegee moves forward, gradually narrowing along the guide holes for printing, air bubbles may be entrained in the ink as it enters the guide holes. However, as the squeegee continues to move forward, pushing the ink into the printing holes, the side walls of the guide holes contract inward, squeezing out the air bubbles. Upon entering the printing holes, the lateral pressure prevents air bubbles from being carried in. Furthermore, the continuous inward pressure from the guide hole side walls during forward movement ensures the ink fills the printing holes more fully, effectively preventing voids, broken grid lines, and indistinct grid lines. When a reduced printing thickness is needed, the squeegee moves in the opposite direction, causing the guide holes to gradually enlarge. When printing with directional scraping, after the squeegee pushes the ink into the guide hole, the ink tends to spread outward as the squeegee continues to push the ink to fill the printing hole. This prevents the ink from fully filling the printing hole, but the ink has a certain fluidity and will fill the printing hole with a lower thickness after the squeegee passes. Therefore, this solar printing screen structure can change the printing thickness by scraping the squeegee in both forward and reverse directions when printing the main grid, thus meeting different processing needs. It has significant advantages, especially for batch processing of the same printing pattern with different printing thicknesses, and can meet the printing needs of different thicknesses with a single solar printing screen.

[0007] In the above technical solution, preferably, the guide layer and the printing layer are bonded together by an adhesive layer, and the adhesive layer has a notch that matches and aligns with the guide hole.

[0008] In the above technical solution, preferably, a woven mesh layer is provided between the guide layer and the printing layer, and the guide layer and the printing layer are respectively bonded to both sides of the woven mesh layer by an adhesive layer, wherein the adhesive layer is provided with a notch that matches and aligns with the guide hole.

[0009] In the above technical solution, preferably, the woven mesh layer is a metal mesh layer, which includes weft braided yarns and warp braided yarns. The warp braided yarns are parallel to the printing holes, and the area where the weft braided yarns of the metal mesh layer are aligned with the guide holes is cut off. This woven mesh layer avoids the obstruction of the paste by the weft braided yarns and the weft braided yarns, increasing the paste's permeability.

[0010] In the above technical solution, preferably, the outer surfaces of a plurality of warp braided filaments located within the guide holes are insulated, and the two ends of the warp braided filaments within the guide holes are connected to the positive and negative terminals of an adjustable voltage power supply. The warp braided filaments within the guide holes generate heat when energized. The temperature of the warp braided filaments within the guide holes is adjusted by regulating the voltage of the adjustable power supply, thereby adjusting the viscosity of the paste. Since poor paste fluidity will make it difficult for the paste to fill the printing holes, while excessive fluidity will cause the printed main grid lines to collapse, the above structure allows the adjustable voltage power supply to be used to adjust the voltage of the warp braided filaments within the guide holes during printing, thereby increasing the paste temperature and improving the paste fluidity, allowing the paste to smoothly enter the printing holes. After entering the printing holes, the voltage of the adjustable power supply is reduced to lower the temperature of the warp braided filaments within the guide holes, reducing the paste fluidity, allowing the paste to enter the printing holes with lower fluidity. Furthermore, by reducing the temperature and reducing the paste fluidity after entering the printing holes, the collapse of the printed main grid lines is prevented.

[0011] In the above technical solution, preferably, the warp braided wires within the guide hole are made of nickel-chromium alloy. Nickel-chromium alloy has high high-temperature strength and is not easily deformed, and it can easily form a dense oxide film on its surface for insulation.

[0012] In the above technical solution, preferably, the surface of the warp braided yarn in the guide hole is pre-oxidized to form an insulating oxide film or coated with an insulating coating.

[0013] The method for making the above-mentioned solar printing screen structure includes the following steps: 1) Preparing the printing layer and the guide layer: cutting printing holes for main grid printing on a single metal plate to form a printing layer, and cutting guide holes corresponding one-to-one with the printing holes on a single metal plate to form a guide layer; 2) Coating an adhesive layer on the printing layer, and attaching the guide layer to the printing layer; 3) Baking the adhesive layer; 4) Scraping off the adhesive layer bonded to the printing layer on the inner side of the guide layer. The solar printing screen structure produced using this plate-making method has guide holes. When the squeegee scrapes forward, i.e., scrapes along the direction that gradually narrows in the guide holes for printing, air bubbles may be entrained when the ink enters the guide holes. However, as the squeegee continues to scrape forward and pushes the ink into the printing holes, the side walls of the guide holes contract inward, squeezing out the air bubbles. When entering the printing holes, due to lateral compression, it is less likely to carry air bubbles into the printing holes. Furthermore, during the continuous forward scraping, the side walls of the guide holes continuously squeeze the ink inward, allowing the ink in the printing holes to be filled more fully, effectively avoiding voids, broken grids, and indistinct grid lines. When it is necessary to reduce the printing thickness, the squeegee scrapes in the opposite direction, i.e., the guide holes... When the squeegee is applied in a gradually increasing direction for printing, after pushing the ink into the guide hole, the ink tends to disperse outward as the squeegee continues to push the ink to fill the printing hole. This prevents the ink from fully filling the printing hole, but the ink has a certain fluidity and will fill the printing hole with a lower thickness after the squeegee passes. Therefore, this solar printing screen structure can change the printing thickness by scraping the squeegee in both the forward and reverse directions when printing the main grid, thereby meeting different processing needs. It has a significant advantage, especially for batch processing of the same printing pattern with different printing thicknesses, and can meet the printing needs of different thicknesses with a single solar printing screen.

[0014] The above-mentioned method for making a solar printing screen structure includes the following steps: 1) Preparing the printing layer and the guide layer: cutting printing holes for main grid printing on a single metal plate to form a printing layer, and cutting guide holes corresponding one-to-one with the printing holes on a single metal plate to form a guide layer; 2) Weaving the woven mesh layer: the woven mesh layer is woven from metal wires, and the warp braided wires passing through the guide holes in the woven mesh layer are made of nickel-chromium alloy material with an insulating surface; 3) Cutting the woven mesh layer: cutting off the weft braided wires in the woven mesh layer that are aligned with the guide holes; 4) Coating adhesive layers on both sides of the woven mesh layer, and attaching the printing layer and the guide layer to the woven mesh layer from both sides; 5) Baking the adhesive layer; 6) Scraping off the adhesive layer bonded to the printing layer on the inside of the guide layer; 7) Connecting the two ends of the nickel-chromium alloy material metal wire to the positive and negative terminals of an adjustable voltage power supply. The solar printing screen structure produced using this plate-making method has guide holes. When the squeegee scrapes forward, i.e., scrapes along the direction that gradually narrows in the guide holes for printing, air bubbles may be entrained when the ink enters the guide holes. However, as the squeegee continues to scrape forward and pushes the ink into the printing holes, the side walls of the guide holes contract inward, squeezing out the air bubbles. When entering the printing holes, due to lateral compression, it is less likely to carry air bubbles into the printing holes. Furthermore, during the continuous forward scraping, the side walls of the guide holes continuously squeeze the ink inward, allowing the ink in the printing holes to be filled more fully, effectively avoiding voids, broken grids, and indistinct grid lines. When it is necessary to reduce the printing thickness, the squeegee scrapes in the opposite direction, i.e., the guide holes... When the squeegee is applied in a gradually increasing direction for printing, after pushing the ink into the guide hole, the ink tends to disperse outward as the squeegee continues to push the ink to fill the printing hole. This prevents the ink from fully filling the printing hole, but the ink has a certain fluidity and will fill the printing hole with a lower thickness after the squeegee passes. Therefore, this solar printing screen structure can change the printing thickness by scraping the squeegee in both the forward and reverse directions when printing the main grid, thereby meeting different processing needs. It has a significant advantage, especially for batch processing of the same printing pattern with different printing thicknesses, and can meet the printing needs of different thicknesses with a single solar printing screen. Furthermore, during printing, the voltage is adjusted by an adjustable power supply to heat the warp braided yarns in the guide hole, thereby increasing the temperature of the paste and improving its fluidity. This allows the paste to smoothly enter the printing hole. After entering the printing hole, the voltage is reduced by the adjustable power supply to lower the temperature of the warp braided yarns in the guide hole, reducing the fluidity of the paste. This allows the paste to enter the printing hole with even lower fluidity. Moreover, by further reducing the temperature and fluidity of the paste after entering the printing hole, the collapse of the printed main grid lines is prevented.

[0015] Compared with existing technologies, this invention has the following advantages: This solar printing screen structure has guide holes. When the squeegee moves forward, i.e., along the direction that gradually narrows to print, air bubbles may be entrained in the ink as it enters the guide holes. However, as the squeegee continues to move forward and push the ink into the printing holes, the side walls of the guide holes contract inward, squeezing out the air bubbles. When entering the printing holes, due to lateral compression, it is less likely to carry air bubbles into the printing holes. Furthermore, during the continuous forward scraping, the side walls of the guide holes continuously compress the ink inward, allowing the ink in the printing holes to fill more fully, effectively avoiding voids, broken grids, and indistinct grid lines. When it is necessary to reduce the printing thickness, the squeegee reverses the direction of the scraping. When the squeegee moves in the direction of gradually increasing guide holes for printing, after pushing the ink into the guide holes, the ink tends to disperse outwards as the squeegee continues to push the ink to fill the printing holes. This prevents the ink from fully filling the printing holes, but the ink has a certain fluidity and will fill the printing holes with a lower thickness after the squeegee passes. Therefore, this solar printing screen structure can change the printing thickness by scraping the squeegee in both forward and reverse directions when printing the main grid, thereby meeting different processing needs. It has a significant advantage, especially for batch processing of the same printing pattern with different printing thicknesses, and can meet the printing needs of different thicknesses with a single solar printing screen. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention.

[0017] Figure 2 This is a partial cross-sectional view of Embodiment 1 of the present invention.

[0018] Figure 3 This is a schematic diagram of the plate-making process in Embodiment 1 of the present invention.

[0019] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention.

[0020] Figure 5 This is a partial cross-sectional view of Embodiment 2 of the present invention.

[0021] Figure 6 This is a schematic diagram of the plate-making process in Embodiment 2 of the present invention. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: See also Figures 1 to 2Example 1: A solar printing screen structure includes a printing layer 1 and a guiding layer 2, which are bonded together. The printing layer 1 has printing holes 3 for main grid printing, and the guiding layer 2 has guiding holes 4 aligned with the printing holes 3. A hysteresis zone for storing paste is formed inside the guiding holes 4. The sidewall of the guiding holes 4 is located outside the sidewall of the printing holes 3, and the distance between the sidewall of the guiding holes 4 and the sidewall of the printing holes 3 gradually increases from one end of the guiding holes 4 to the other end. This solar-powered printing screen structure has guide holes 4. When the squeegee moves forward, that is, along the direction where the guide holes 4 gradually narrow, air bubbles may be entrained when the ink enters the guide holes 4. However, as the squeegee continues to move forward and push the ink into the printing holes 3, the side walls of the guide holes 4 contract inward, squeezing out the air bubbles. When entering the printing holes 3, due to lateral compression, it is less likely to carry air bubbles into the printing holes 3. Furthermore, during the continuous forward scraping, the side walls of the guide holes 4 continuously squeeze the ink inward, allowing the ink in the printing holes 3 to be filled more fully, effectively avoiding voids, broken grids, and indistinct grid lines. When it is necessary to reduce the printing thickness, the squeegee moves in the opposite direction, that is, the guide holes gradually widen. When printing with a large squeegee motion, after the squeegee pushes the paste into the guide hole 4, due to the divergent effect of the guide hole 4, the paste tends to diverge outward as the squeegee continues to push the paste to fill the printing hole 3. This prevents the paste from fully filling the printing hole 3, but the paste has a certain fluidity, and after the squeegee passes, it will fill the printing hole 3 with a lower thickness. Therefore, this solar printing screen structure can change the printing thickness by scraping the squeegee in the forward and reverse directions when printing the main grid, thereby meeting different processing needs. It has significant advantages, especially for batch processing needs of different printing thicknesses for the same printed pattern, and can meet the printing needs of different thicknesses with a single solar printing screen.

[0023] The guide layer 2 and the printing layer 1 are bonded together by an adhesive layer 5, and the adhesive layer 5 has a notch that matches and aligns with the guide hole 4.

[0024] See Figure 3The above-mentioned method for making a solar printing screen structure includes the following steps: 1) Preparing a printing layer 1 and a guide layer 2: Cutting printing holes 3 for main grid printing on a single metal plate to form a printing layer 1, and cutting guide holes 4 corresponding to the printing holes 3 on a single metal plate to form a guide layer 2; 2) Coating an adhesive layer 5 on the printing layer 1, and attaching the guide layer 2 to the printing layer 1; 3) Baking the adhesive layer 5; 4) Scraping off the adhesive layer 5 bonded to the printing layer 1 on the inner side of the guide layer 2. The solar printing screen structure produced by this plate-making method has guide holes 4. When the squeegee scrapes forward, that is, scrapes along the direction that gradually narrows along the guide holes 4 for printing, air bubbles may be entrained when the ink enters the guide holes 4. However, as the squeegee continues to scrape forward and pushes the ink into the printing holes 3, the side walls of the guide holes 4 contract inward, squeezing out the air bubbles. When entering the printing holes 3, due to lateral compression, it is not easy to bring air bubbles into the printing holes 3. Furthermore, during the continuous forward scraping, the side walls of the guide holes 4 continuously squeeze the ink inward, allowing the ink in the printing holes 3 to be filled more fully, effectively avoiding voids, broken grids, and indistinct grid lines. When it is necessary to reduce the printing thickness, the squeegee scrapes in the opposite direction, that is... When the squeegee is scraped in the direction of gradually increasing guide holes for printing, after the squeegee pushes the paste into the guide hole 4, due to the divergent effect of the guide hole 4, the paste tends to diverge outward as the squeegee continues to push the paste to fill the printing hole 3. This prevents the paste from fully filling the printing hole 3, but the paste has a certain fluidity and will fill the printing hole 3 with a lower thickness after the squeegee passes. Therefore, this solar printing screen structure can change the printing thickness by scraping the squeegee in the forward and reverse directions when printing the main grid, thereby meeting different processing needs. It has significant advantages, especially for batch processing needs of different printing thicknesses for the same printing pattern, and can meet the printing needs of different thicknesses with a single solar printing screen.

[0025] See Figures 4 to 5Example 2: A solar printing screen structure includes a printing layer 1 and a guiding layer 2, which are bonded together. A woven mesh layer 6 is provided between the guiding layer 2 and the printing layer 1. The guiding layer 2 and the printing layer 1 are bonded to both sides of the woven mesh layer 6 by an adhesive layer 5. The adhesive layer 5 has notches that match and align with the guide holes 4. The printing layer 1 has printing holes 3 for printing the main grid. The guiding layer 2 has guide holes 4 that align with the printing holes 3. A hysteresis zone for storing paste is formed inside the guide holes 4. The sidewall of the guide hole 4 is located outside the sidewall of the printing hole 3, and the distance between the sidewall of the guide hole 4 and the sidewall of the printing hole 3 gradually increases from one end of the guide hole 4 to the other end. This solar-powered printing screen structure has guide holes 4. When the squeegee moves forward, that is, along the direction where the guide holes 4 gradually narrow, air bubbles may be entrained when the ink enters the guide holes 4. However, as the squeegee continues to move forward and push the ink into the printing holes 3, the side walls of the guide holes 4 contract inward, squeezing out the air bubbles. When entering the printing holes 3, due to lateral compression, it is less likely to carry air bubbles into the printing holes 3. Furthermore, during the continuous forward scraping, the side walls of the guide holes 4 continuously squeeze the ink inward, allowing the ink in the printing holes 3 to be filled more fully, effectively avoiding voids, broken grids, and indistinct grid lines. When it is necessary to reduce the printing thickness, the squeegee moves in the opposite direction, that is, the guide holes gradually widen. When printing with a large squeegee motion, after the squeegee pushes the paste into the guide hole 4, due to the divergent effect of the guide hole 4, the paste tends to diverge outward as the squeegee continues to push the paste to fill the printing hole 3. This prevents the paste from fully filling the printing hole 3, but the paste has a certain fluidity, and after the squeegee passes, it will fill the printing hole 3 with a lower thickness. Therefore, this solar printing screen structure can change the printing thickness by scraping the squeegee in the forward and reverse directions when printing the main grid, thereby meeting different processing needs. It has significant advantages, especially for batch processing needs of different printing thicknesses for the same printed pattern, and can meet the printing needs of different thicknesses with a single solar printing screen.

[0026] In this embodiment, the woven mesh layer 6 is a metal mesh layer, which includes weft braided yarns 7 and warp braided yarns 8. The warp braided yarns 8 are parallel to the printing holes 3, and the area where the weft braided yarns 7 of the metal mesh layer are aligned with the guide holes 4 is cut off. This woven mesh layer 6 avoids the obstruction of the paste by the weft braided yarns 7 and increases the paste permeability.

[0027] In this embodiment, the outer surfaces of several warp braided filaments 8 located within the guide holes 4 are insulated, and both ends of the warp braided filaments 8 within the guide holes 4 are connected to the positive and negative terminals of an adjustable power supply 9. The warp braided filaments 8 within the guide holes 4 generate heat when energized. The temperature of the warp braided filaments 8 within the guide holes 4 is adjusted by regulating the voltage of the adjustable power supply 9 during printing to raise the temperature of the warp braided filaments 8 within the guide holes 4, thereby improving the fluidity of the fluid and allowing the fluid to smoothly enter the printing holes 3. After entering the printing holes 3, the voltage of the adjustable power supply 9 is reduced to lower the temperature of the warp braided filaments 8 within the guide holes 4, reducing the fluidity of the fluid. This allows the fluid to enter the printing holes 3 with lower fluidity, and further reducing the fluidity of the fluid after entering the printing holes 3 prevents the collapse of the printed main grid lines.

[0028] In this embodiment, the warp braided wire 8 inside the guide hole 4 is made of nickel-chromium alloy. Nickel-chromium alloy has high high-temperature strength and is not easily deformed, and it can easily form a dense oxide film on its surface for insulation.

[0029] In this embodiment, the surface of the warp braided yarn 8 inside the guide hole 4 is pre-oxidized to form an insulating oxide film or coated with an insulating coating.

[0030] Of course, in other embodiments, the braided mesh layer 6 may not be entirely a metal mesh layer, as long as the warp braided wires 8 in its guide holes 4 are electrically conductive and self-heating metal wires, or electrically conductive and self-heating metal wires are inserted in the warp direction, and the two ends of the electrically conductive and self-heating metal wires are connected in series with a controllable power supply. The rest of the structure remains unchanged, and the same technical effect can be achieved.

[0031] See Figure 6The above-mentioned method for making a solar-powered printing screen structure includes the following steps: 1) Preparing the printing layer 1 and the guide layer 2: Cutting printing holes 3 for main grid printing on a single metal plate to form the printing layer 1, and cutting guide holes 4 corresponding to the printing holes 3 on the single metal plate to form the guide layer 2; 2) Weaving the mesh layer 6: The mesh layer 6 is woven from metal wires, and the warp braided wires 8 passing through the guide holes 4 in the mesh layer 6 are made of nickel-chromium alloy material with an insulating surface; 3) Cutting the mesh layer 6: Cutting off the weft braided wires 7 in the mesh layer 6 that are aligned with the guide holes 4; 4) Coating the mesh layer 6 with an adhesive layer 5 on both sides, and attaching the printing layer 1 and the guide layer 2 to the mesh layer 6 from both sides; 5) Baking the adhesive layer 5; 6) Scraping off the adhesive layer 5 bonded to the printing layer 1 on the inside of the guide layer 2; 7) Connecting the two ends of the nickel-chromium alloy material metal wire to the positive and negative terminals of an adjustable voltage power supply 9. The solar printing screen structure produced using this plate-making method has guide holes 4. When the squeegee scrapes forward, i.e., scrapes along the direction that gradually narrows along the guide holes 4 for printing, air bubbles may be entrained when the ink enters the guide holes 4. However, as the squeegee continues to scrape forward and pushes the ink into the printing holes 3, the side walls of the guide holes 4 contract inward, squeezing out the air bubbles. When entering the printing holes 3, due to lateral compression, it is less likely to carry air bubbles into the printing holes 3. Furthermore, during the continuous forward scraping, the side walls of the guide holes 4 continuously squeeze the ink inward, allowing the ink in the printing holes 3 to be filled more fully, effectively avoiding voids, broken grids, and indistinct grid lines. When it is necessary to reduce the printing thickness, the squeegee scrapes in the opposite direction, i.e. When the squeegee is scraped in the direction of gradually increasing guide holes for printing, after the squeegee pushes the paste into the guide hole 4, due to the divergent effect of the guide hole 4, the paste tends to diverge outward as the squeegee continues to push the paste to fill the printing hole 3. This prevents the paste from fully filling the printing hole 3, but the paste has a certain fluidity and will fill the printing hole 3 with a lower thickness after the squeegee passes. Therefore, this solar printing screen structure can change the printing thickness by scraping the squeegee in the forward and reverse directions when printing the main grid, thereby meeting different processing needs. It has significant advantages, especially for batch processing needs of different printing thicknesses for the same printing pattern, and can meet the printing needs of different thicknesses with a single solar printing screen. Furthermore, during printing, the voltage is adjusted by the adjustable power supply 9 to energize and heat the warp braided yarns 8 in the guide hole 4, thereby increasing the fluidity of the ink and allowing it to smoothly enter the printing hole 3. After entering the printing hole 3, the voltage is reduced by the adjustable power supply 9 to lower the temperature of the warp braided yarns 8 in the guide hole 4, reducing the fluidity of the ink. This allows the ink to enter the printing hole 3 with even lower fluidity. Moreover, by further reducing the temperature and fluidity of the ink after entering the printing hole 3, the collapse of the main grid lines after printing is prevented.

[0032] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A solar-powered printing screen structure, characterized in that: It includes a printing layer (1) and a guide layer (2), the guide layer (2) and the printing layer (1) are bonded together, the printing layer (1) is provided with a printing hole (3) for main grid printing, the guide layer (2) is provided with a guide hole (4) aligned with the printing hole (3), a hysteresis zone for storing slurry is formed in the guide hole (4), the sidewall of the guide hole (4) is located outside the sidewall of the printing hole (3), and the distance between the sidewall of the guide hole (4) and the sidewall of the printing hole (3) gradually increases from one end of the guide hole (4) to the other end.

2. The solar printing screen structure as described in claim 1, characterized in that: The guide layer (2) and the printing layer (1) are bonded together by an adhesive layer (5), and the adhesive layer (5) has a notch that matches and aligns with the guide hole (4).

3. The solar printing screen structure as described in claim 1, characterized in that: A woven mesh layer (6) is provided between the guide layer (2) and the printing layer (1). The guide layer (2) and the printing layer (1) are respectively bonded to both sides of the woven mesh layer (6) by an adhesive layer (5). The adhesive layer (5) has a notch that matches and aligns with the guide hole (4).

4. The solar printing screen structure as described in claim 3, characterized in that: The woven mesh layer (6) is a metal mesh layer, which includes weft braided wires (7) and warp braided wires (8). The warp braided wires (8) are parallel to the printing holes (3), and the area where the weft braided wires (7) of the metal mesh layer are aligned with the guide holes (4) is cut off.

5. The solar printing screen structure as described in claim 4, characterized in that: Several warp braided filaments (8) located in the guide hole (4) have their outer surfaces insulated, and the two ends of the warp braided filaments (8) located in the guide hole (4) are connected to the positive and negative terminals of an adjustable power supply (9). The warp braided filaments (8) in the guide hole (4) generate heat when energized. The temperature of the warp braided filaments (8) located in the guide hole (4) is adjusted by adjusting the voltage of the adjustable power supply to adjust the viscosity of the slurry.

6. The solar printing screen structure as described in claim 5, characterized in that: The warp braided wire (8) inside the guide hole (4) is made of nickel-chromium alloy material.

7. The solar printing screen structure as described in claim 6, characterized in that: The surface of the warp braided yarn (8) inside the guide hole (4) is pre-oxidized to form an insulating oxide film or coated with an insulating coating.

8. The method for making a solar-powered printing screen structure as described in claim 1, characterized in that, Includes the following steps: 1) Prepare the printed layer (1) and the guide layer (2): Cut out printing holes (3) for main grid printing on a single metal plate to form the printed layer (1), and cut out guide holes (4) corresponding to the printing holes (3) on the single metal plate to form the guide layer (2); 2) Apply an adhesive layer (5) to the printed layer (1), and attach the guide layer (2) to the printed layer (1); 3) Bake the adhesive layer (5); 4) Scrape off the adhesive layer (5) that is bonded to the printed layer (1) on the inside of the guide layer (2).

9. The method for making a solar-powered printing screen structure as described in claim 6, characterized in that, Includes the following steps: 1) Preparation of the printing layer (1) and the guide layer (2): Printing holes (3) for main grid printing are cut out on a single metal plate to form the printing layer (1), and guide holes (4) corresponding to the printing holes (3) are cut out on the single metal plate to form the guide layer (2); 2) Weaving the braided mesh layer (6): The braided mesh layer (6) is woven from metal wires, and the warp braided wires (8) passing through the guide holes (4) in the braided mesh layer (6) are made of nickel-chromium alloy material with surface insulation treatment; 3) Cutting the braid 4) Cut off the weft braided yarn (7) in the braided mesh layer (6) that is aligned with the guide hole (4); 5) Apply adhesive layer (5) to both sides of the braided mesh layer (6), and attach the printed layer (1) and the guide layer (2) to the braided mesh layer (6) from both sides; 6) Bake the adhesive layer (5); 7) Scrape off the adhesive layer (5) that is bonded to the printed layer (1) on the inside of the guide layer (2); 8) Connect the two ends of the metal wire made of nickel-chromium alloy to the positive and negative poles of the adjustable voltage power supply (9).

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