Novel screen plate design structure

Abstract

The utility model provides a novel screen plate design structure, which belongs to the technical field of solar cell screen printing and comprises a printing screen plate, two film supporting pieces are arranged in the printing screen plate in parallel, and a scraper is arranged between the two film supporting pieces. According to the novel screen plate design structure, when the scraping plate pushes slurry, the slurry is blocked by the thin film and cannot overflow out of a printing area, the slurry is fully utilized, and generation of filtered slurry is reduced; meanwhile, the slurry reciprocates along with the scraper part in the printing area, so that the possibility of air drying of the slurry is reduced; when the slurry is pushed by the scraping plate, due to the fact that the thin film is partially connected with the printing screen plate, partial downward pressure brought by a scraper can be borne, stress between the scraping plate and the printing screen plate and stress between the printing screen plate and a silicon wafer are more uniform, the printing quality is improved, the plate explosion risk is reduced, and the frequency of replacing the screen plate is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of solar cell screen printing, and in particular relates to a novel screen plate design structure used in a solar cell screen printing process. Background Art

[0002] The crystalline silicon solar screen printing process is a process of printing the back main grid, back sub-grid and front main grid, front sub-grid on both sides of the silicon wafer in sequence; therefore, the silicon wafer has four printing steps in the screen printing process, each step requires the use of silver paste / silver-aluminum paste, and the paste is expensive. Reducing the loss of paste is also a key work point for reducing costs in the battery manufacturing production line. During normal printing, a lot of paste will be generated on both sides of the scraper and cannot move back and forth with the printing suite. Over time, it will become dry paste. The disadvantages of dry paste are as follows: if mixed with normal paste, it will have a greater impact on printing quality. Recovering and filtering the dry paste will waste a lot of manpower and time costs. Using it after filtering will also have a greater impact on the efficiency of the solar cell. Summary of the Invention

[0003] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a new screen design structure, which prevents the slurry from overflowing from both sides of the scraper during normal printing, so that the slurry can keep moving back and forth with the printing kit, thereby reducing the generation of dry slurry; it bears part of the pressure applied by the scraper during printing, ensuring printing quality while reducing the risk of screen explosion.

[0004] In order to achieve the above technical objectives, the technical solution adopted by this utility model is:

[0005] A novel screen design structure includes a printing screen, wherein two film supports are arranged in parallel in the printing screen, and a scraper is arranged between the two film supports.

[0006] Preferably, in the novel screen design structure, the printing screen is a rectangular parallelepiped structure, and the printing screen includes a bottom plate and side plates arranged around the bottom plate.

[0007] Preferably, in the novel mesh plate design structure, both ends of each film support are connected to two parallel side plates, and the bottom of each film support is connected to the bottom plate.

[0008] Preferably, in the novel screen plate design structure, the distance between the two film supports is not less than the length of the scraper.

[0009] Preferably, in the novel screen plate design structure, the height of each film support member is not less than the height of the scraper.

[0010] The beneficial effects of the technical solution provided by the embodiment of the utility model are:

[0011] The utility model has a new screen design structure. When the scraper pushes the slurry, the slurry is blocked by the thin film and will not overflow the printing area. The slurry is fully utilized, reducing the generation of filtered slurry. At the same time, the slurry follows the reciprocating movement of the scraper part in the printing area, reducing the possibility of the slurry drying out. When the scraper pushes the slurry, since the thin film is connected to the printing screen part, it can withstand part of the downward pressure brought by the scraper, so that the force between the scraper and the printing screen, and between the printing screen and the silicon wafer is more uniform, thereby improving printing quality, reducing the risk of screen explosion, and reducing the frequency of screen replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural diagram of the new screen design structure of the utility model. DETAILED DESCRIPTION

[0013] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "inside, outside", "up, down", "front, back", etc. are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0014] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0015] like Figure 1 A new type of screen design structure includes a printing screen 1, two film supports 2 are arranged in parallel inside the printing screen 1, and a scraper 3 is arranged between the two film supports 2; the printing screen 1 is a rectangular structure, and the printing screen 1 includes a bottom plate and side plates arranged around the bottom plate; both ends of each film support 2 are connected to the two side plates arranged in parallel, and the bottom of each film support 2 is connected to the bottom plate; the distance between the two film supports 2 is not less than the length of the scraper 3; the height of each film support 2 is not less than the height of the scraper 3; the side plates include a first side plate 11 arranged in parallel in pairs and a second side plate 12 arranged in parallel in pairs, and the first side plate 11 and the second side plate 12 are arranged vertically.

[0016] The film supports 2 are made of a material that is resilient, wear-resistant, and leak-proof. Each film support 2 has two ends connected to two parallel plates via adhesive, and the bottom of each film support 2 is also connected to the base plate via adhesive. The film supports are made of PET film, and the adhesive is CPS web adhesive.

[0017] When the scraper pushes the slurry, the slurry is blocked by the thin film and will not overflow the printing area. The slurry is fully utilized, reducing the generation of filtered slurry. At the same time, the slurry follows the reciprocating motion of the scraper in the printing area, reducing the possibility of the slurry drying out. When the scraper pushes the slurry, since the thin film is connected to the printing screen, it can withstand part of the downward pressure brought by the scraper, making the force between the scraper and the printing screen, and between the printing screen and the silicon wafer more uniform, thereby improving printing quality, reducing the risk of screen explosion, and reducing the frequency of screen replacement.

[0018] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to examples, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A new type of screen design structure, characterized in that, It comprises a printing screen (1), two film supports (2) are arranged in parallel in the printing screen (1), and a scraper (3) is arranged between the two film supports (2); The printing screen (1) is a rectangular parallelepiped structure, comprising a bottom plate and side plates arranged around the bottom plate, both ends of each film support (2) being connected to the two side plates arranged in parallel, and the bottom of each film support (2) being connected to the bottom plate.

2. The novel screen design structure according to claim 1 is characterized in that: The distance between the two film supports (2) is not less than the length of the scraper (3).

3. The novel screen design structure according to claim 1 is characterized in that: The height of each film support (2) is not less than the height of the scraper (3).

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