Screen printing plate for reducing unit consumption of silver paste in photovoltaic industry

Abstract

The utility model provides a screen printing plate for reducing silver paste unit consumption in the photovoltaic industry, which relates to the technical field of silver paste screen printing plates and comprises a connecting frame, a screen printing plate mechanism is arranged between the inner surface walls of the connecting frame, and the screen printing plate mechanism comprises a plurality of transverse wefts and a plurality of longitudinal warps. According to the utility model, the first guide strip, the second guide strip and the third guide strip are made into triangular long strips by adopting polytetrafluoroethylene materials, and the anti-sticking sleeves coated outside the first base plate, the second base plate and the third base plate are also made of polytetrafluoroethylene materials; in addition, after the feeding opening above the longitudinal printing opening and the transverse printing opening is expanded, the silver paste material can conveniently and directly penetrate through the device to be printed on the photovoltaic panel, and therefore good conductivity is achieved; and the design can effectively avoid the problem that the silver paste loss is increased due to the fact that the silver paste raw material is adhered to the surface of the screen printing plate when the silver paste material is brushed through the screen printing plate, and the production cost is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of silver paste screens, in particular to a screen used in the photovoltaic industry and capable of reducing the unit consumption of silver paste. Background Art

[0002] Photovoltaic silver paste is the core material in the production of battery cells. It not only directly determines the conductive performance of the battery cells, but is also the core consumable material whose proportion in battery costs is second only to silicon wafers. The high cost and large consumption of silver paste are one of the pain points that restrict the cost reduction of photovoltaic cells. Reducing the unit consumption of silver paste can greatly enhance the competitiveness of enterprises.

[0003] In the prior art, for example, Chinese patent publication number CN217514750U discloses a screen for reducing the front silver consumption, including a printing screen and a PI film, wherein the thickness of the PI film is 4 μm, a printing opening is provided on the PI film, the width of the printing opening is 12.5 μm, the thickness of the printing screen is 15 μm, and a non-knot disconnection area is provided on the printing screen at a position corresponding to the printing opening position, and the width of the printing opening and the thickness of the PI film are changed without changing the thickness of the printing screen, thereby achieving the effect of reducing the front silver consumption without affecting the electrode conductive efficiency, thereby achieving the effect of reducing production costs, and compared with the conventional method of changing the wire diameter or mesh number of the printing screen, it will not affect the strength and service life of the printing screen itself, and will not increase the passing resistance during printing due to the change in mesh number.

[0004] Although the above patent changes the width of the printing opening and the thickness of the PI film without changing the thickness of the printing screen, thereby reducing the positive silver consumption without affecting the electrode conductivity, thereby reducing the production cost. However, when the silver paste screen is in use, the silver paste material needs to be brushed to the printing opening position on the screen surface. During the process of brushing the material, the silver paste raw material will inevitably adhere to the position near the screen printing opening, and it is difficult to collect it effectively, which leads to an increase in silver paste loss. In order to further reduce production costs, we propose a new type of screen that reduces the silver paste consumption for the photovoltaic industry. Utility Model Content

[0005] The purpose of the utility model is to solve the problem in the prior art that when a silver paste screen is used, the silver paste material needs to be brushed onto the printing opening position on the screen surface. During the process of brushing the material, the silver paste raw material will inevitably adhere to the position near the screen printing opening, and it is difficult to effectively collect it, which leads to an increase in silver paste loss. A screen with reduced silver paste consumption is proposed for the photovoltaic industry.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a screen for reducing the unit consumption of silver paste in the photovoltaic industry, comprising a connecting frame, a screen mechanism is arranged between the inner surface walls of the connecting frame, the screen mechanism comprises a plurality of transverse latitudes and a plurality of longitudinal warps, a plurality of the latitudes and warps are cross-connected, a first substrate is connected to a position near the left side between the outer surfaces of the latitudes and warps, a second substrate and a third substrate are symmetrically connected to a position near the right side between the outer surfaces of the latitudes and warps, a longitudinal printing opening is arranged between the first substrate, the second substrate and the third substrate, a transverse printing opening is arranged between the second substrate and the third substrate, a first guide strip is connected to the top of the first substrate near the right side edge, a second guide strip is connected to the top of the second substrate near the left side and the front side edge, and a third guide strip is connected to the top of the third substrate near the left side and the rear side edge.

[0007] Preferably, the top of the first guide strip is inclined, the top of the second guide strip is inclined, and the top of the third guide strip is inclined.

[0008] Preferably, the outer surfaces of the first substrate, the second substrate and the third substrate are all coated with anti-sticking sleeves.

[0009] Preferably, a residual material discharge port is provided at the center of the front surface of the connecting frame, and the residual material discharge port corresponds to the longitudinal printing opening position.

[0010] Preferably, a rotating shaft is fixedly connected between the inner surface walls on both sides of the residual material discharge outlet at a position close to the top, and a limiting baffle is fixedly connected between the inner surface walls on both sides of the residual material discharge outlet at a position behind the rotating shaft.

[0011] Preferably, bolts are symmetrically mounted on the front surface of the connection frame, a tie rod is sleeved between the shafts of two of the bolts, and a closed baffle is rotatably connected to the outer surface of the rotating shaft.

[0012] Preferably, the closed baffle is matched with the residual material discharge port, and the tie rod and the closed baffle are tightly fitted with the front surface of the connecting frame.

[0013] Preferably, a first guide rod is symmetrically fixedly connected between the outer surfaces of both sides of the connecting frame, the outer surfaces of the two first guide rods are slidably connected with a first connecting ear, a first scraper is fixedly connected between the outer surfaces of the two first connecting ears, and a first inclined surface is provided on the outer surface of one side of the first scraper near the bottom.

[0014] Preferably, a second guide rod is symmetrically fixedly connected between the front and rear outer surfaces of the connecting frame, the outer surfaces of the two second guide rods are slidably connected with second connecting ears, a second scraper is fixedly connected between the outer surfaces of the two second connecting ears, and the front surface of the second scraper is provided with a second inclined surface near the bottom.

[0015] Preferably, a push rod is symmetrically fixedly connected to the front surface of the second scraper near the top, the two push rods cooperate with the closed baffle, the height of the second guide rod is higher than the height of the first guide rod, the first scraper is adapted to the horizontal printing opening, and the second scraper is adapted to the vertical printing opening.

[0016] Compared with the prior art, the advantages and positive effects of the utility model are:

[0017] 1. In the utility model, the first guide strip, the second guide strip and the third guide strip are made of triangular strips of polytetrafluoroethylene material, and the anti-sticking sleeves coated on the outside of the first substrate, the second substrate and the third substrate are also made of polytetrafluoroethylene material. The longitudinal printing opening and the feed opening above the transverse printing opening are enlarged to facilitate the silver paste material to pass directly through the device and be printed on the photovoltaic panel, thereby achieving good conductivity. In addition, this design can effectively avoid the problem of increased silver paste loss caused by the adhesion of silver paste raw materials to the screen surface when the silver paste material is applied through the screen, effectively reducing the production cost.

[0018] 2. In the utility model, during the precipitation process of the silver paste in the longitudinal printing opening and the transverse printing opening, the first scraper is pulled to the left to push the excess silver paste material in the transverse printing opening into the longitudinal printing opening, and then the second scraper is pulled forward to push the excess silver paste material in the longitudinal printing opening to the front side. After the push rod on the front surface of the second scraper is squeezed to the closed baffle, the closed baffle will flip upward with the rotating shaft as the center and squeeze the tensioning rod to stretch, so that the excess silver paste is discharged from the residual material discharge port. This design can make the electrode surface formed by the silver paste smoother, and can effectively control the amount of silver paste and recycle the excess, thereby further reducing the silver paste loss when the screen is used and reducing the overall production cost of the photovoltaic panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional diagram of a screen for reducing silver paste consumption in the photovoltaic industry is proposed for the utility model;

[0020] Figure 2 A top view of a screen for reducing silver paste consumption in the photovoltaic industry is provided for the utility model;

[0021] Figure 3 The utility model provides a schematic diagram of the screen mechanism structure of a screen for reducing the silver paste consumption in the photovoltaic industry;

[0022] Figure 4 The utility model provides a schematic diagram of a connection frame structure of a screen for reducing silver paste consumption in the photovoltaic industry;

[0023] Figure 5 The utility model provides a schematic diagram of a closed baffle structure of a screen for reducing silver paste consumption in the photovoltaic industry;

[0024] Figure 6 The utility model provides a schematic diagram of a push rod structure of a screen for reducing silver paste consumption in the photovoltaic industry.

[0025] Legend: 1. Screen mechanism; 101. First substrate; 102. Second substrate; 103. Third substrate; 104. Weft; 105. Warp; 106. Longitudinal printing opening; 107. Horizontal printing opening; 108. Anti-sticking sleeve; 109. First guide strip; 110. Second guide strip; 111. Third guide strip; 2. Connecting frame; 21. Residue discharge port; 22. Rotating shaft; 23. Limit baffle; 3. Closing baffle; 31. Bolt; 32. Tie rod; 4. First scraper; 41. First inclined plane; 42. First connecting ear; 43. First guide rod; 5. Second scraper; 51. Second inclined plane; 52. Second connecting ear; 53. Second guide rod; 54. Push rod. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0028] Embodiment 1, as Figure 1-Figure 6As shown, the utility model provides a screen for reducing silver paste consumption in the photovoltaic industry, including a connecting frame 2, a screen mechanism 1 is arranged between the inner surface walls of the connecting frame 2, the screen mechanism 1 includes a plurality of transverse latitudes 104 and a plurality of longitudinal warps 105, the plurality of latitudes 104 and the warps 105 are cross-connected, a first substrate 101 is connected to a position near the left side between the outer surfaces of the latitudes 104 and the warps 105, a second substrate 102 and a third substrate 103 are symmetrically connected to a position near the right side between the outer surfaces of the latitudes 104 and the warps 105, and a longitudinal printing opening is arranged between the first substrate 101, the second substrate 102 and the third substrate 103 106, a transverse printing opening 107 is provided between the second substrate 102 and the third substrate 103, a first guide strip 109 is connected to the top of the first substrate 101 near the right edge, a second guide strip 110 is connected to the top of the second substrate 102 near the left and front edges, a third guide strip 111 is connected to the top of the third substrate 103 near the left and rear edges, the top of the first guide strip 109 is inclined, the top of the second guide strip 110 is inclined, the top of the third guide strip 111 is inclined, and the outer surfaces of the first substrate 101, the second substrate 102 and the third substrate 103 are all coated with an anti-sticking sleeve 108.

[0029] The effect achieved by the entire embodiment 1 is that when the device is in use, the silver paste material is brushed onto the longitudinal printing opening 106 and the transverse printing opening 107 formed between the first substrate 101, the second substrate 102 and the third substrate 103. At this time, the first guide strip 109, the second guide strip 110 and the third guide strip 111 form an opening that is wide at the top and narrow at the bottom at both sides above the longitudinal printing opening 106 and the transverse printing opening 107, which facilitates the silver paste to directly enter the printing opening for precipitation to form an electrode. In addition, the first guide strip 109, the second guide strip 110 and the third guide strip 111 in the silver award screen are made of triangular strips made of polytetrafluoroethylene material, and the anti-sticking sleeve 108 brushed onto the outside of the first substrate 101, the second substrate 102 and the third substrate 103 is also made of polytetrafluoroethylene material. The polytetrafluoroethylene material has low surface energy and good non-stickiness, and has poor compatibility with the silver paste. Therefore, it is difficult for the silver paste to adhere to the first guide strip 1 09, the second guide strip 110, the third guide strip 111, the first substrate 101, the second substrate 102 and the third substrate 103 are on the surface, and the feed port above the longitudinal printing opening 106 and the transverse printing opening 107 is enlarged, which facilitates the silver paste material to pass through the device directly and be printed on the photovoltaic panel, thereby achieving good conductivity, and the design can effectively avoid the problem of increased silver paste loss caused by the adhesion of silver paste raw materials on the screen surface when the silver paste material is brushed through the screen, effectively reducing the production cost, the first substrate 101, the second substrate 102 and the third substrate 103 mainly provide support and fixation, so that the entire screen maintains a certain shape and structural stability, and serves as the basis of the weft 104 and the warp 105 to maintain the overall strength of the screen, the weft 104 and the warp 105 cooperate to weave together to form a structure with specific mesh holes, these mesh holes determine the position and amount of silver paste and other slurries passing through, thereby accurately controlling the printing pattern of silver paste on the photovoltaic panel.

[0030] Embodiment 2, as Figure 1-Figure 6As shown, a waste material discharge port 21 is provided at the center of the front surface of the connecting frame 2, and the positions of the waste material discharge port 21 and the longitudinal printing opening 106 correspond to each other, a rotating shaft 22 is fixedly connected between the inner surface walls on both sides of the waste material discharge port 21 near the top, and a limited baffle 23 is fixedly connected between the inner surface walls on both sides of the waste material discharge port 21 at the rear side of the rotating shaft 22, bolts 31 are symmetrically installed on the front surface of the connecting frame 2, a tie rod 32 is sleeved between the rods of the two bolts 31, a closed baffle 3 is rotatably connected to the outer surface of the rotating shaft 22, the closed baffle 3 and the waste material discharge port 21 are adapted, the tie rod 32 and the closed baffle 3 are tightly fitted to the front surface of the connecting frame 2, and first guide rods 43 are symmetrically fixedly connected between the outer surfaces of both sides of the connecting frame 2, and the outer surfaces of the two first guide rods 43 are both slidably connected to the first connecting rods A connecting ear 42, a first scraper 4 is fixedly connected between the outer surfaces of the two first connecting ears 42, a first inclined surface 41 is provided on the outer surface of one side of the first scraper 4 near the bottom, a second guide rod 53 is symmetrically fixedly connected between the front and rear outer surfaces of the connecting frame 2, the outer surfaces of the two second guide rods 53 are both slidably connected with the second connecting ear 52, a second scraper 5 is fixedly connected between the outer surfaces of the two second connecting ears 52, a second inclined surface 51 is provided on the front surface of the second scraper 5 near the bottom, a push rod 54 is symmetrically fixedly connected to the front surface of the second scraper 5 near the top, the two push rods 54 are matched with the closed baffle 3, the height of the second guide rod 53 is higher than the height of the first guide rod 43, the first scraper 4 is adapted to the horizontal printing opening 107, and the second scraper 5 is adapted to the longitudinal printing opening 106.

[0031] The effect achieved by the entire embodiment 2 is that during the precipitation process of the silver paste in the longitudinal printing opening 106 and the transverse printing opening 107, the first scraper 4 is pulled to the left to push the excess silver paste material in the transverse printing opening 107 into the longitudinal printing opening 106, and then the second scraper 5 is pulled forward to move forward to push the excess silver paste material in the longitudinal printing opening 106 to the front side, and after the push rod 54 on the front surface of the second scraper 5 is squeezed to the closed baffle 3, the closed baffle 3 will flip upward with the rotating shaft 22 as the center and squeeze the tensioning rod 32 to stretch, so that the excess silver paste is discharged from the residual material discharge port 21. This design can make the electrode surface formed by the silver paste smoother, and can effectively control the amount of silver paste used and recycle the excess amount, thereby further reducing the use time of the screen. The silver paste loss is reduced, and the overall production cost of the photovoltaic panel is reduced. After the second scraper 5 is loosened, the rebound of the tie rod 32 will push the closed baffle 3 to reset and re-cover the residual material discharge outlet 21, and the limit baffle 23 is mainly used to limit the closed baffle 3 to avoid excessive rotation. The bolt 31 is mainly used to fix the tie rod 32. The first connecting ear 42 cooperates with the first guide rod 43 to guide the first scraper 4. The second connecting ear 52 cooperates with the second guide rod 53 to guide the second scraper 5. The first inclined surface 41 and the second inclined surface 51 arranged on the bottom of the surface of the first scraper 4 and the second scraper 5 are mainly used to facilitate the scraping of the silver paste raw material, while also effectively avoiding the first scraper 4 and the second scraper 5 occupying the space inside the horizontal printing opening 107 and the vertical printing opening 106.

[0032] Working principle: When the device is in use, the silver paste material is brushed onto the longitudinal printing opening 106 and the transverse printing opening 107 formed between the first substrate 101, the second substrate 102 and the third substrate 103. At this time, the first guide strip 109, the second guide strip 110 and the third guide strip 111 form an opening that is wide at the top and narrow at the bottom at both sides above the longitudinal printing opening 106 and the transverse printing opening 107, which facilitates the silver paste to directly enter the printing opening for precipitation to form an electrode. In addition, the first guide strip 109, the second guide strip 110 and the third guide strip 111 in the silver award screen are made of polytetrafluoroethylene. The polytetrafluoroethylene material is made into triangular strips, and the anti-sticking sleeve 108 brushed on the outside of the first substrate 101, the second substrate 102 and the third substrate 103 is also made of polytetrafluoroethylene material. The polytetrafluoroethylene material has low surface energy and good non-stickiness, and has poor compatibility with silver paste. Therefore, it is difficult for the silver paste to adhere to the first guide strip 109, the second guide strip 110, the third guide strip 111, the first substrate 101, the second substrate 102 and the third substrate 103. The feed port above the longitudinal printing opening 106 and the transverse printing opening 107 is enlarged to facilitate the silver paste material to pass through the device directly and then print on The photovoltaic panel is provided with good conductivity, and the design can effectively avoid the problem of increased silver paste loss caused by the adhesion of silver paste raw materials on the screen surface when the silver paste material is applied through the screen, thereby effectively reducing the production cost. During the precipitation process of the silver paste in the longitudinal printing opening 106 and the transverse printing opening 107, the excess silver paste material in the transverse printing opening 107 can be pushed into the longitudinal printing opening 106 by pulling the first scraper 4 to move to the left, and then the excess silver paste material in the longitudinal printing opening 106 can be pushed to the front side after the second scraper 5 is pulled forward and moved forward. The push rod 5 on the front surface of the second scraper 5 After being squeezed to the closed baffle plate 3, the closed baffle plate 3 will turn upward with the rotating shaft 22 as the center and squeeze the tie rod 32 to stretch, so that the excess silver paste is discharged from the residual material discharge port 21. This design can make the electrode surface formed by the silver paste smoother, and can effectively control the amount of silver paste and recycle the excess amount, thereby further reducing the silver paste loss when the screen is used and reducing the overall production cost of the photovoltaic panel. After the second scraper 5 is released, the tie rod 32 rebounds and pushes the closed baffle plate 3 to reset, thereby re-blocking the residual material discharge port 21, and the limiting baffle plate 23 is mainly used to limit the closed baffle plate 3 to avoid excessive rotation.

[0033] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A screen for reducing silver paste consumption in the photovoltaic industry, comprising a connecting frame (2), characterized in that: A screen mechanism (1) is provided between the inner surface walls of the connecting frame (2); The screen mechanism (1) comprises a plurality of transverse latitudes (104) and a plurality of longitudinal longitudes (105), wherein the plurality of latitudes (104) and longitudes (105) are cross-connected, a first substrate (101) is connected to a position close to the left side between the outer surfaces of the latitudes (104) and longitudes (105), a second substrate (102) and a third substrate (103) are symmetrically connected to a position close to the right side between the outer surfaces of the latitudes (104) and longitudes (105), and the first substrate (101) and the second substrate (103) are connected to each other. 2) and the third substrate (103), a longitudinal printing opening (106) is provided between the second substrate (102) and the third substrate (103), a transverse printing opening (107) is provided between the second substrate (102) and the third substrate (103), a first guide strip (109) is connected to the top of the first substrate (101) near the right edge, a second guide strip (110) is connected to the top of the second substrate (102) near the left and front edges, and a third guide strip (111) is connected to the top of the third substrate (103) near the left and rear edges.

2. The screen for reducing silver paste consumption for photovoltaic industry according to claim 1, characterized in that: The top of the first guide strip (109) is arranged at an incline, the top of the second guide strip (110) is arranged at an incline, and the top of the third guide strip (111) is arranged at an incline.

3. The screen for reducing silver paste consumption for photovoltaic industry according to claim 2, characterized in that: The outer surfaces of the first substrate (101), the second substrate (102) and the third substrate (103) are all coated with an anti-sticking sleeve (108).

4. The screen for reducing silver paste consumption for photovoltaic industry according to claim 3, characterized in that: A residual material discharge port (21) is provided at the center of the front surface of the connection frame (2), and the residual material discharge port (21) corresponds to the position of the longitudinal printing opening (106).

5. The screen for reducing silver paste consumption for photovoltaic industry according to claim 4, characterized in that: A rotating shaft (22) is fixedly connected between the inner walls on both sides of the residual material discharge outlet (21) at a position close to the top, and a limiting baffle (23) is fixedly connected between the inner walls on both sides of the residual material discharge outlet (21) at a position behind the rotating shaft (22).

6. The screen for reducing silver paste consumption for photovoltaic industry according to claim 5, characterized in that: Bolts (31) are symmetrically mounted on the front surface of the connection frame (2), a tie rod (32) is sleeved between the shafts of the two bolts (31), and a closed baffle (3) is rotatably connected to the outer surface of the rotating shaft (22).

7. The screen for reducing silver paste consumption for photovoltaic industry according to claim 6, characterized in that: The closed baffle (3) is matched with the residual material discharge port (21), and the tie rod (32) and the closed baffle (3) are tightly fitted with the front surface of the connecting frame (2).

8. The screen for reducing silver paste consumption for photovoltaic industry according to claim 7, characterized in that: A first guide rod (43) is symmetrically fixedly connected between the outer surfaces of both sides of the connection frame (2); the outer surfaces of the two first guide rods (43) are slidably connected to first connection ears (42); a first scraper (4) is fixedly connected between the outer surfaces of the two first connection ears (42); and a first inclined surface (41) is provided on one side of the outer surface of the first scraper (4) near the bottom.

9. The screen for reducing silver paste consumption for photovoltaic industry according to claim 8, characterized in that: A second guide rod (53) is symmetrically fixedly connected between the front and rear outer surfaces of the connection frame (2); the outer surfaces of the two second guide rods (53) are slidably connected to second connection ears (52); a second scraper (5) is fixedly connected between the outer surfaces of the two second connection ears (52); and a second inclined surface (51) is provided on the front surface of the second scraper (5) near the bottom.

10. The screen for reducing silver paste consumption for photovoltaic industry according to claim 9, characterized in that: A push rod (54) is symmetrically fixedly connected to a front surface of the second scraper (5) near the top, the two push rods (54) cooperate with the closed baffle (3), the height of the second guide rod (53) is higher than the height of the first guide rod (43), the first scraper (4) is compatible with the transverse printing opening (107), and the second scraper (5) is compatible with the longitudinal printing opening (106).

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