Novel screen layout structure capable of reducing unit consumption

Abstract

The utility model relates to a novel screen layout structure capable of reducing unit consumption, which belongs to the technical field of printing and comprises a replacement component, the replacement component comprises a fixing frame, rotating shafts are rotatably connected to the inner side walls of the left side and the right side of the fixing frame, one ends of the two rotating shafts penetrate through the fixing frame and are fixedly connected with belt pulleys, and silk screens are wound on the two rotating shafts. One ends, far away from the rotating shaft, of the two silk screens are mutually fixed, the same belt is arranged between the two belt wheels in a sleeved mode, a motor is fixedly connected to the side wall of the fixing frame, and the output end of the motor is fixedly connected with the rotating shaft. After the screen printing plate is on line, the slurry consumption can be reduced, the photoelectric conversion efficiency of a battery can be improved, meanwhile, the silk screen can be rapidly fixed and removed so that the silk screen can be rapidly replaced, and waste of silver slurry generated when the silk screen is replaced can be reduced in cooperation with the cleaning assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of printing, in particular to a new stencil layout structure for reducing unit consumption. Background Technique

[0002] In solar screen printing, the structure of the stencil layout is usually composed of tiny openings with specific sizes and shapes, which are used to control the thickness and pattern of the thin film to ensure that the printed charge transport material is evenly and correctly distributed on the solar cell. Common stencil structures include linear, square, circular, etc. The specific structure design depends on the required functions and performance requirements. By precisely controlling the structure of the stencil layout, the efficiency and stability of solar cells can be effectively improved. In the photovoltaic industry, screen printing is mainly applied to the electrode forming of batteries. Printing is carried out based on the basic principle that the slurry penetrates through the mesh holes in the graphic part of the screen and does not penetrate through the mesh holes in the non-graphic part. As one of the key steps in the production of crystalline silicon solar cells, the basic process of screen printing is: pressing the conductive slurry containing metal through the mesh holes of the screen onto the silicon wafer to form a circuit or electrode.

[0003] In recent years, it has developed very rapidly, and the competition in the industry has become increasingly fierce. Manufacturers in the industry have been constantly exploring ways to reduce production costs to increase the competitiveness of enterprises. Solar cells used for power generation are the core of the solar industry. During the battery production process, silver paste is an essential and expensive production auxiliary material. Reducing the use of silver paste has always been the goal that technical personnel in battery enterprises have been constantly pursuing. In addition, when replacing the existing stencil layout, it is also very inconvenient, and silver paste is easily wasted during the replacement process. Therefore, the applicant proposes a new stencil layout structure for reducing unit consumption. Content of the Utility Model

[0004] The purpose of the utility model is to provide a new stencil layout structure for reducing unit consumption to solve the problems of reducing the waste of silver paste and the inconvenience of replacing the stencil layout proposed in the above background technique.

[0005] The technical solution of the utility model is as follows:

[0006] It includes a replacement component, and the replacement component includes a fixed frame. Rotating shafts are rotatably connected to the inner side walls of the left and right sides of the fixed frame. One ends of the two rotating shafts penetrate through the fixed frame and are fixedly connected with belt pulleys. Silk screens are wound around the two rotating shafts, and the ends of the two silk screens away from the rotating shafts are fixed to each other. The same belt is sleeved between the two belt pulleys. A motor is fixedly connected to the side wall of the fixed frame, and the output end of the motor is fixedly connected with the rotating shaft. Clamping components for clamping and fixing and cleaning components for cleaning the slurry are installed on the inner walls of the front and rear sides of the fixed frame.

[0007] Further, the clamping assembly includes a pressing plate fixedly connected between two wire meshes. Lower fixing seats located below the wire meshes are fixedly connected to the inner walls of the front and rear sides of the fixed frame. Upper moving blocks magnetically attracted to the lower fixing seats are slidably connected to the inner walls of the front and rear sides of the fixed frame. Inclined surfaces are formed on the opposite side walls of the lower fixing seats and the upper moving blocks, and the two inclined surfaces form an angle.

[0008] By providing the clamping assembly, the wire mesh can be clamped and fixed by the magnetic force between the upper moving block and the lower fixing seat. At the same time, when the wire mesh is replaced, the fixing of the wire mesh can be automatically released by the pushing of the pressing plate, further improving the convenience of replacing the wire mesh.

[0009] Further, the cleaning assembly includes a pushing plate fixedly connected to the upper side wall of the fixed frame, and the wire mesh penetrates through the pushing plate. The cleaning assembly further includes a moving plate fixedly connected to the pressing plate. Telescopic air bags are fixedly connected between the left and right side walls of the moving plate and the fixed frame respectively. An air storage box is fixedly connected to the upper side wall of the pushing plate. A communication pipe is connected between the air storage box and the telescopic air bags. A plurality of pressurizing nozzles are connected to the air storage box, and the plurality of pressurizing nozzles are all inclined downward.

[0010] By providing the cleaning assembly, when the moving plate squeezes the telescopic air bags, the silver paste can be blown onto the wire mesh to be replaced by using gas, avoiding waste caused by the silver paste remaining on the wire mesh.

[0011] The present utility model provides a novel screen layout structure for reducing unit consumption through improvement. Compared with the prior art, it has the following improvements and advantages:

[0012] First: The present utility model can quickly fix and release the wire mesh, facilitating the quick replacement of the wire mesh.

[0013] Second: The present utility model, in cooperation with the cleaning assembly, can reduce the waste of silver paste generated during the replacement of the wire mesh. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following further explains the present utility model with reference to the drawings and embodiments:

[0015] Figure 1 is the three-dimensional perspective view of the present utility model;

[0016] Figure 2 is the structural schematic diagram of the replacement assembly of the present utility model;

[0017] Figure 3 is the structural schematic diagram of the cleaning assembly of the present utility model;

[0018] Figure 4 is the structural schematic diagram of the clamping assembly of the present utility model;

[0019] Figure 5 is the shape and dimension diagram of the utility model before optimization;

[0020] Figure 6 is the shape and dimension diagram of the utility model after optimization.

[0021] Explanation of reference numerals in the drawings:

[0022] 1. Replacement component; 101. Fixed frame; 102. Rotating shaft; 103. Pulley; 104. Wire mesh; 105. Belt; 106. Motor;

[0023] 2. Clamping component; 201. Extrusion plate; 202. Lower fixed seat; 203. Upper moving block;

[0024] 3. Cleaning component; 301. Pushing plate; 302. Moving plate; 303. Telescopic airbag; 304. Air storage box; 305. Booster spray head; 306. Connecting pipe. Detailed implementation manners

[0025] Next, the present utility model will be described in detail in conjunction with the attached Figures 1 to 5 The technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] The present utility model provides a novel screen printing plate layout structure for reducing specific consumption by improvement, as shown in Figure 1 - Figure 4 As shown, it includes a replacement component 1. The replacement component 1 includes a fixed frame 101. The inner side walls of the left and right sides of the fixed frame 101 are both rotatably connected with a rotating shaft 102. One end of each of the two rotating shafts 102 penetrates through the fixed frame 101 and is fixedly connected with a pulley 103. A wire mesh 104 is wound around each of the two rotating shafts 102, and the ends of the two wire meshes 104 far from the rotating shafts 102 are fixed to each other. A same belt 105 is sleeved between the two pulleys 103. A motor 106 is fixedly connected to the side wall of the fixed frame 101, and the output end of the motor 106 is fixedly connected with the rotating shaft 102. The structure and principle of the motor 106 are both prior art and will not be elaborated here. Clamping components 2 for clamping and fixing and cleaning components 3 for cleaning the slurry are installed on the inner walls of the front and rear sides of the fixed frame 101.

[0027] In this embodiment: When it is necessary to replace the wire mesh 104, first, the staff starts the motor 106. The motor 106 drives the rotating shaft 102 to rotate. The rotating shaft 102 drives another rotating shaft 102 to rotate in the same direction through the pulley 103 and the belt 105. One rotating shaft 102 winds up the wire mesh 104, and the other rotating shaft 102 can unwind the wire mesh 104, so that another wire mesh 104 can be unfolded, thus achieving the purpose of replacement.

[0028] In the above embodiment, in order to clamp the wire mesh 104 after the replacement of the wire mesh 104 to improve the stability of the use of the wire mesh 104, the following method can be adopted for implementation:

[0029] In a preferred embodiment, the clamping assembly 2 includes a pressing plate 201 fixedly connected between two wire meshes 104. Lower fixing seats 202 located below the wire mesh 104 are fixedly connected to the inner walls of the front and rear sides of the fixed frame 101. Upper moving blocks 203 magnetically attracted to the lower fixing seats 202 are slidably connected to the inner walls of the front and rear sides of the fixed frame 101. Oblique surfaces are formed on the opposite side walls of the lower fixing seats 202 and the upper moving blocks 203, and the two oblique surfaces form an included angle.

[0030] In this embodiment, in the working state, the upper moving block 203 moves downward under the magnetic force of the lower fixing seat 202. The upper moving block 203 and the lower fixing seat 202 play an effective clamping role on the wire mesh 104. When the wire mesh 104 is replaced, the pressing plate 201 will move between the lower fixing seat 202 and the upper moving block 203, causing the upper moving block 203 to move upward under pressure, thus releasing the locking of the wire mesh 104. Until the pressing plate 201 moves to the other side of the upper moving block 203, it will fix the wire mesh 104 again. At this time, the replacement of the wire mesh 104 is also completed.

[0031] Reference Figure 2 and Figure 4 In a preferred embodiment, the cleaning assembly 3 includes a push plate 301 fixedly connected to the upper side wall of the fixed frame 101, and the wire mesh 104 passes through the push plate 301. The cleaning assembly 3 further includes a moving plate 302 fixedly connected to the pressing plate 201. Telescopic air bags 303 are fixedly connected between the left and right side walls of the moving plate 302 and the fixed frame 101 respectively. An air storage box 304 is fixedly connected to the upper side wall of the push plate 301. A communication pipe 306 is connected between the air storage box 304 and the telescopic air bag 303. A plurality of pressurizing nozzles 305 are connected to the air storage box 304, and the plurality of pressurizing nozzles 305 are all inclined downward.

[0032] In this embodiment: During the process of replacing the screen 104, the push plate 301 will scrape the silver paste on the surface of the screen 104 until all the silver paste is scraped near the push plate 301. At the same time, the extrusion plate 201 will also drive the moving plate 302 to move together. The moving plate 302 exerts an extrusion effect on the telescopic airbag 303, so that the air inside the telescopic airbag 303 passes through the connecting pipe 306 into the air storage box 304 and finally discharges from the pressurized nozzle 305, blowing the silver paste on the surface of the screen 104 to the surface of another screen 104.

[0033] In addition, referring to Figure 5 and Figure 5 , the size of the PAD point in the middle of the screen 104 is 1mm * 0.8mm. According to the welding direction and the situation of the welding tape, the size of the PAD point will be adjusted to 0.8mm * 0.8mm and rotated 90 degrees, and the corners will overlap with the position of the sub-grid; the connecting line between the PAD point in the middle of the screen 104 and the PAD point of the sub-grid screen is cancelled;

[0034] As Figure 5 shown, the overlapping position of the PAD point and the sub-grid needs to be connected by a gradient line to ensure sufficient mechanical properties when the main and sub-grids are welded; as Figure 6 shown, the size of the PAD point in the middle of the present invention is changed from the original 1mm * 0.8mm to 0.8mm * 0.8mm. Considering the welding direction of the component and the width of the welding tape, the contact length between the rotated PAD point and the welding tape is 1.13mm. The overlapping position of the corner and the sub-grid can prevent the grid from breaking, which is far better than the original PAD point design. This design meets the reliability requirements; as Figure 6 shown, the present invention cancels the connecting line between the PAD point in the middle of the main grid and the contact position of the sub-grid, which can save the paste amount of the ink penetration of the connecting line part;

[0035] The present utility model combines the overprinting of the main and sub-grids, which can ensure sufficient welding tension. At the same time, the ink penetration area is reduced from the original 0.89mm 2 to 0.64mm 2 the optimized area of one PAD point. The consumption of the main grid printing paste is reduced by 6%. At the same time, it can also reduce the shading area on the surface of the battery cell, improve the photoelectric conversion efficiency, enable the present utility model to optimize the printing pattern, reduce the printing area of the pattern, reduce the paste penetration amount, thereby reducing the paste usage amount, effectively reducing the production cost and increasing the enterprise income without affecting the product reliability.

[0036] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A novel screen layout structure with reduced unit consumption, comprising a replacement component (1), characterized in that: The replacement component (1) comprises a fixed frame (101), the inner side walls on the left and right sides of the fixed frame (101) are rotatably connected to a rotating shaft (102), one end of each of the two rotating shafts (102) passes through the fixed frame (101) and is fixedly connected to a pulley (103), a wire mesh (104) is wound around each of the two rotating shafts (102), and the ends of the two wire meshes (104) away from the rotating shaft (102) are fixed to each other, a same belt (105) is sleeved between the two pulleys (103), a motor (106) is fixedly connected to the side wall of the fixed frame (101), and the output end of the motor (106) is fixedly connected to the rotating shaft (102), and a clamping component (2) for clamping and fixing and a cleaning component (3) for cleaning slurry are installed on the inner walls on the front and rear sides of the fixed frame (101).

2. According to claim 1, a novel screen layout structure for reducing unit consumption is characterized by: The clamping assembly (2) comprises an extrusion plate (201) fixedly connected to the two wire meshes (104), and the inner walls on both the front and rear sides of the fixing frame (101) are fixedly connected to a lower fixing seat (202) located at the lower side of the wire meshes (104).

3. A novel screen layout structure for reducing unit consumption according to claim 2, characterized in that: The inner walls on both the front and rear sides of the fixed frame (101) are slidably connected with an upper moving block (203) that is magnetically attracted to the lower fixed seat (202).

4. A novel screen layout structure for reducing unit consumption according to claim 3, characterized in that: The side walls opposite to the lower fixed seat (202) and the upper movable block (203) are both chiseled with inclined surfaces, and the two inclined surfaces form an angle.

5. A novel screen layout structure for reducing unit consumption according to claim 4, characterized in that: The cleaning assembly (3) comprises a push plate (301) fixedly connected to the upper side wall of the fixed frame (101), and the wire mesh (104) is arranged through the push plate (301).

6. A novel screen layout structure for reducing unit consumption according to claim 5, characterized in that: The cleaning assembly (3) further comprises a movable plate (302) fixedly connected to the extrusion plate (201); a telescopic airbag (303) is fixedly connected between the left and right side walls of the movable plate (302) and the fixed frame (101); an air storage box (304) is fixedly connected to the upper side wall of the push plate (301); and a connecting pipe (306) is connected between the air storage box (304) and the telescopic airbag (303).

7. A novel screen layout structure for reducing unit consumption according to claim 6, characterized in that: The gas storage box (304) is connected to a plurality of booster nozzles (305), and the plurality of booster nozzles (305) are all arranged to be tilted downward.

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