Novel metal screen plate

Abstract

The utility model discloses a novel metal screen plate, which comprises an upper screen plate and a lower screen plate, a plurality of parallel upper grid line holes are arranged on the upper screen plate, a plurality of parallel lower grid line holes communicated with the upper grid line holes are arranged on the lower screen plate, two side walls of the upper grid line holes adopt symmetrical arc-shaped structures with upward openings, and the upper grid line holes are communicated with the lower grid line holes. And the bottom ends of the two side walls of the upper-layer grid line hole are respectively connected with the top ends of the two side walls of the lower-layer grid line hole. And a right-angle step between the two is eliminated, so that the conductive slurry can be prevented from being accumulated into blocks, the screen printing quality is ensured, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of screen, concretely to a novel metal screen. BACKGROUND

[0002] Screen technology has the advantages of simple process, large graphic design space, and suitability for large-scale production, and has become a widely used technology in the electronic field. For example, in the field of solar cells, a printing screen is an important tool for printing electrodes of solar cells. The printing screen generally includes a screen frame and screen gauze stretched in the screen frame. Conductive paste is poured onto the screen, and a squeegee is used to move the conductive paste on the screen gauze, so that the conductive paste is extruded through the grid line holes on the screen gauze to the solar cell to form a corresponding pattern on the solar cell, thereby forming an electrode of the solar cell. Figure 1 and Figure 2 As shown in the drawings, the existing metal screen includes an upper screen 1 and a lower screen 2, both of which are integrally manufactured from nickel alloy material. The width of the upper grid line hole 11 is different from that of the lower grid line hole 21, and a right-angle step is formed between the two. The squeegee cannot reach the right-angle step when scraping the conductive paste, so that the conductive paste in the right-angle step will be continuously accumulated and formed into a block. The slow-pressure grid line groove 12 also adopts a right-angle structure, which will also accumulate the conductive paste into a block. If the block-shaped conductive paste enters the solar cell to form an electrode, it will greatly affect the conductivity of the solar cell, and even cause waste products, resulting in increased production cost. SUMMARY

[0003] To solve the technical problems existing in the prior art, the purpose of the present application is to provide a novel metal screen that can avoid the accumulation of conductive paste into a block, ensure the quality of screen printing, and reduce production cost.

[0004] To solve the above-mentioned technical problems, the technical scheme adopted by the present application is as follows: a novel metal screen includes an upper screen and a lower screen. The upper screen is provided with a plurality of parallel upper grid line holes. The lower screen is provided with a plurality of parallel lower grid line holes that communicate with the upper grid line holes. The two side walls of the upper grid line hole adopt a symmetrical arc-shaped structure with the opening facing upward. The bottom end of the two side walls of the upper grid line hole is connected to the top end of the two side walls of the lower grid line hole.

[0005] Preferably, the upper screen is made of stainless steel material, the lower screen is made of nickel alloy material, and the upper screen and the lower screen are connected and fixed by welding.

[0006] Preferably, a slow-pressure grid line groove is provided between adjacent upper grid line holes on the upper screen, and the depth of the slow-pressure grid line groove is less than the thickness of the upper screen.

[0007] Preferably, the slow pressure grid line groove adopts a semicircular structure.

[0008] Preferably, the upper layer grid line hole and the slow pressure grid line groove are formed by etching stainless steel, and the surfaces of the upper layer grid line hole and the slow pressure grid line groove are formed with etched concave-convex points.

[0009] Preferably, the upper layer screen is provided with a plurality of connecting bridges perpendicular to the upper layer grid line hole, and the connecting bridges connect the two side walls of the upper layer grid line hole.

[0010] Preferably, the connecting bridges and the upper layer screen are in an integral structure.

[0011] Compared with the prior art, the novel metal screen has the beneficial effects that:

[0012] The novel metal screen has the beneficial effects that: BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 FIG. 1 is a structural schematic view of an existing metal screen;

[0014] Figure 2 FIG. 2 is a sectional view of A-A in FIG. 1; Figure 1

[0015] Figure 3 FIG. 4 is a structural schematic view of the present application;

[0016] Figure 4 FIG. 5 is a sectional view of B-B in FIG. 4; Figure 3

[0017] FIG. 6 is a sectional view of C-C in FIG. 4; Figure 5 Figure 3 FIG. 7 is an enlarged view of D in FIG. 4;

[0018] Figure 6 Figure 4 FIG. 8 is a sectional view of D in FIG. 4;

[0019] In the drawings: 1, upper layer screen; 11, upper layer grid line hole; 12, slow pressure grid line groove; 13, connecting bridge; 2, lower layer screen; 21, lower layer grid line hole. DETAILED DESCRIPTION

[0020] Hereinafter, the present application will be further described in conjunction with the drawings and specific embodiments, and it should be noted that the following described embodiments or technical features can be combined in any manner to form new embodiments without conflict.

[0021] ​​​In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0022] As shown in Figure 3 and Figure 4 , a new type of metal screen printing plate, comprising an upper layer screen printing plate 1 and a lower layer screen printing plate 2, a plurality of parallel upper layer screen printing holes 11 are arranged on the upper layer screen printing plate 1, a plurality of parallel lower layer screen printing holes 21 are arranged on the lower layer screen printing plate 2, the two side walls of the upper layer screen printing hole 11 adopt symmetrical arc structure with the opening facing upward, and the bottom end of the two side walls of the upper layer screen printing hole 11 is connected with the top end of the two side walls of the lower layer screen printing hole 21. The right angle step between the upper layer screen printing hole 11 and the lower layer screen printing hole 21 is eliminated, which can avoid the accumulation of conductive paste into blocks, ensure the quality of screen printing, and reduce the production cost.

[0023] The upper layer screen printing plate 1 is made of stainless steel material, the lower layer screen printing plate 2 is made of nickel alloy material, and the upper layer screen printing plate 1 and the lower layer screen printing plate 2 are connected and fixed by welding. The upper layer screen printing plate 1 directly contacts with the scraper, and the stainless steel material is more resistant to pressure and has a long service life.

[0024] The upper layer screen printing plate 1 is provided with a pressure relief screen printing slot 12 between adjacent upper layer screen printing holes 11, and the depth of the pressure relief screen printing slot 12 is less than the thickness of the upper layer screen printing plate 1. The pressure relief screen printing slot 12 can buffer the pressure of the scraper, improving the service life of the metal screen printing plate.

[0025] The pressure relief screen printing slot 12 adopts a semicircular structure to ensure uniform buffering stress.

[0026] As shown in Figure 4 and Figure 6 , the upper layer screen printing hole 11 and the pressure relief screen printing slot 12 are formed by etching stainless steel, and the surface of the upper layer screen printing hole 11 and the pressure relief screen printing slot 12 is formed with etched concave-convex points. Generally, electrolytic etching method is used to etch stainless steel into a shape, and the formed concave-convex points can slow down the free flow of conductive paste, ensuring the uniformity of the conductive paste.

[0027] As shown in Figure 5 , the upper layer screen printing plate 1 is provided with a plurality of connecting bridges 13 perpendicular to the upper layer screen printing hole 11, and the connecting bridges 13 connect the two side walls of the upper layer screen printing hole 11. The connecting bridges 13 improve the overall strength of the upper layer screen printing plate 1.

[0028] The connecting bridge 13 and the upper layer screen printing plate 1 are an integral structure. It has high strength and is easy to manufacture.

[0029] The above embodiments are merely preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and substitutions made by those skilled in the art based on the present application shall fall within the scope of protection of the present application.

Claims

1. A novel metal screen printing plate comprising an upper screen printing plate (1) and a lower screen printing plate (2), the upper screen printing plate (1) being provided with a plurality of parallel upper screen printing plate line holes (11), the lower screen printing plate (2) being provided with a plurality of parallel lower screen printing plate line holes (21) in communication with the upper screen printing plate line holes (11), characterized in that: The two side walls of the upper layer grid line hole (11) adopt symmetrical opening upward arc structure, and the bottom ends of the two side walls of the upper layer grid line hole (11) are connected with the top ends of the two side walls of the lower layer grid line hole (21) respectively.

2. A novel metal screen printing plate according to claim 1, characterized in that: The upper layer screen (1) is made of stainless steel material, the lower layer screen (2) is made of nickel alloy material, and the upper layer screen (1) and the lower layer screen (2) are connected and fixed by welding.

3. A novel metal screen printing plate according to claim 2, characterized in that: The upper layer screen (1) is provided with a slow pressure grid line groove (12) between adjacent upper layer grid line holes (11), and the depth of the slow pressure grid line groove (12) is less than the thickness of the upper layer screen (1).

4. A novel metal screen printing plate according to claim 3, characterized in that: The slow pressure grid line groove (12) adopts a semicircular structure.

5. A novel metal screen printing plate according to claim 3, characterized in that: The upper layer grid line hole (11) and the slow pressure grid line groove (12) are formed by corroding stainless steel, and the surfaces of the upper layer grid line hole (11) and the slow pressure grid line groove (12) are formed with corroded concave-convex points.

6. A novel metal screen printing plate according to claim 1, characterized in that: The upper layer screen (1) is provided with a plurality of connecting bridges (13) perpendicular to the upper layer grid line hole (11), and the connecting bridges (13) connect the two side walls of the upper layer grid line hole (11).

7. A novel metal screen printing plate according to claim 6, characterized in that: The connecting bridge (13) and the upper layer screen (1) are an integral structure.

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