Composite silk-screen printing plate

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By stacking high mesh thin wire diameter and low mesh thick wire diameter steel wire mesh in the screen printing screen, and using hot melt adhesive film to form a composite screen, the tensile resistance of high mesh thin wire mesh steel wire mesh is solved by using tensile The problem of insufficient strength improves the tensile strength and stability of the printed screen, and reduces the line breakage rate and cost.

CN222346519UActive Publication Date: 2025-01-14CHANGZHOU YALONG ELECTRONIC TECH CO LTD

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Patent Information

Application Number: CN202421284765.8
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-06-05
Publication Date: 2025-01-14
Estimated Expiration: 2034-06-05

AI Technical Summary

Technical Problem

The existing steel wire mesh with high mesh number and thin wire diameters are insufficient in the screen printing screen, which is prone to disconnection, resulting in a decrease in printing quality and high cost.

Method used

Using composite screen printing screen plate, by stretching the wire drawing screen in the frame, and stacking it with high mesh thin wire diameter wire screen and low mesh thick wire diameter wire screen, combined with hot melt adhesive film, Form a composite screen to improve tensile strength and stability.

Benefits of technology

It effectively reduces the probability of wire breakage, extends service life, improves printing quality and tensile strength, and reduces costs.

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Abstract

The utility model provides a composite silk-screen printing plate, which is characterized in that a tensioning wire mesh is arranged in a frame body in a tightened manner, a steel wire mesh with low mesh number and large wire diameter is arranged on the tensioning wire mesh corresponding to a second window, and a steel wire mesh with high mesh number and small wire diameter is stacked on the steel wire mesh with low mesh number and large wire diameter corresponding to the second window. The high-mesh thin-wire-diameter steel wire mesh and the low-mesh thick-wire-diameter steel wire mesh which are overlapped and compounded are arranged in the pattern printing area to form the composite screen printing plate, so that the defect that steel wires are easily broken due to the fact that the tensile strength of the high-mesh steel wire mesh is insufficient is effectively overcome; in addition, the overall area of the composite screen printing plate can be increased through the low-mesh large-wire-diameter steel wire mesh with the area larger than that of the high-mesh small-wire-diameter steel wire mesh, so that the overall tensile strength of the composite screen printing plate is further improved, and the tension uniformity stability and rebound consistency of the composite screen printing plate when the composite screen printing plate is extruded by a scraper blade are guaranteed; and therefore, the probability of wire breakage of the steel wire mesh is reduced, and the plate explosion rate of the high-mesh silk-screen printing plate is reduced.

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Description

Technical Field

[0001] The utility model belongs to the technical field of solar cell processing and manufacturing equipment, in particular, relates to a composite screen printing screen. Background Art

[0002] Screen printing is a process used in mass production of solar cells. Its purpose is to emboss a conductive paste containing metal onto a silicon wafer through the mesh holes of the screen to form circuits and / or electrodes. Currently, high-mesh and fine-wire steel screens are mostly used for screen printing. However, due to the high hardness of the polyester mesh and the thin wire diameter of the high-mesh steel screen, when the scraper squeezes the screen printing screen, the steel wire of the steel screen will break due to the existence of stress, causing the screen printing screen to explode and reduce the service life of the screen printing screen. In addition, continuing to use the screen printing screen after the wire breaks for printing will affect the printing quality. In addition, due to the high price of high-mesh steel screens, the cost in actual use is relatively high. Utility Model Content

[0003] Based on the above problems existing in the prior art, the purpose of the embodiments of the utility model is to provide a composite screen printing screen to solve the problem that the high-mesh steel wire mesh in the prior art structure has insufficient tensile strength and is prone to wire breakage.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a composite screen printing screen, including:

[0005] A frame body having a first window formed therein;

[0006] A first screen is stretched in the first window, the outer edge of the first screen is connected to the frame, and a second window is opened in the center of the first screen;

[0007] A second screen is disposed on the first screen at a position corresponding to the second window, wherein an outer edge of the second screen overlaps an inner edge of the first screen; and

[0008] a third screen, superimposed on the second screen at a position corresponding to the second window, and the area of the third screen is smaller than the area of the second window;

[0009] Wherein, the first wire mesh is a tensioned wire mesh used for tensioning the second wire mesh and / or the third wire mesh in the circumferential direction and providing resilience to the second wire mesh and / or the third wire mesh, the third wire mesh is a high-mesh and fine-wire steel wire mesh, and the second wire mesh is a low-mesh and coarse-wire steel wire mesh with a mesh lower than that of the third wire mesh and a wire diameter larger than that of the third wire mesh.

[0010] Furthermore, the tensioned wire mesh is a polyester mesh.

[0011] Furthermore, the mesh number of the low-mesh and thick-wire-diameter steel wire mesh is 360-400 meshes, and the wire diameter of the low-mesh and thick-wire-diameter steel wire mesh is 13-18 microns.

[0012] Furthermore, the mesh number of the high-mesh and fine-wire steel wire mesh is 480-520 meshes, and the wire diameter of the high-mesh and fine-wire steel wire mesh is 8-11 microns.

[0013] Furthermore, the overlapping parts of the high-mesh and fine-wire steel wire mesh and the low-mesh and thick-wire steel wire mesh are connected by hot-melt welding.

[0014] Furthermore, the composite screen printing screen also includes a hot melt adhesive film coated on the first screen, and the hot melt adhesive film includes a hot melt composite area located at the overlapping part of the first screen and the second screen and a hot melt adhesive coating area adjacent to the hot melt composite area.

[0015] Furthermore, the outer dimension of the hot melt adhesive coating area is smaller than the outer dimension of the first screen, so that the hot melt adhesive film located at the periphery of the hot melt adhesive coating area and the first screen located at the edge of the frame form a stress release area.

[0016] Furthermore, the hot melt adhesive film is a PET film.

[0017] Furthermore, a first connection area is provided at a portion of the first wire mesh adjacent to the frame, a second connection area is formed at a portion where the second wire mesh overlaps with the first wire mesh, and hardness of the first connection area is less than hardness of the second connection area.

[0018] Furthermore, the frame is an aluminum frame.

[0019] Compared with the prior art, the above one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects:

[0020] The composite silk screen printing screen in the embodiment of the utility model has a tensioned wire mesh stretched in the frame, a low-mesh thick-wire steel mesh is arranged at a position corresponding to the second window on the tensioned wire mesh, and a high-mesh thin-wire steel mesh is stacked at a position corresponding to the second window on the low-mesh thick-wire steel mesh, so that the stacked composite high-mesh thin-wire steel mesh and low-mesh thick-wire steel mesh are arranged in the graphic printing area to form a composite screen, which not only effectively overcomes the defect of high-mesh steel mesh with insufficient tensile strength and easy wire breakage, but also can increase the overall area of the composite screen by using the low-mesh thick-wire steel mesh with an area larger than that of the high-mesh thin-wire steel mesh, so as to further improve the overall tensile strength of the composite screen, ensure the uniform tension stability and rebound consistency of the composite screen when being squeezed by the scraper, thereby reducing the probability of wire mesh breakage and reducing the explosion rate of the high-mesh silk screen printing screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 A schematic diagram of the structure of a composite screen printing screen provided by an embodiment of the utility model;

[0023] Figure 2 A schematic diagram of the structure of a frame provided by an embodiment of the utility model;

[0024] Figure 3 A schematic diagram of the structure in which the first screen provided in the embodiment of the utility model is assembled on the frame;

[0025] Figure 4 A schematic diagram of the structure of the first screen and the hot melt adhesive film provided in the embodiment of the utility model being assembled on the frame;

[0026] Figure 5 A schematic diagram of the structure of the second screen and the third screen combined in an embodiment of the utility model.

[0027] Among them, the reference numerals in the figure are:

[0028] 1-frame; 2-first screen; 3-second screen;

[0029] 4-third screen; 5-first window; 6-second window;

[0030] 7-first connection area; 8-second connection area;

[0031] 9-hot melt adhesive film; 91-hot melt composite area; 92-hot melt adhesive laminating area. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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 used to limit the present invention.

[0033] It should be noted that when an element is referred to as "connected to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly specified and specifically defined. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0034] Reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment," "in some embodiments," or "in some of these embodiments" appear in various places throughout the specification, not all references are to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0035] Please also read Figures 1 to 5The composite screen printing screen provided by the embodiment of the utility model is now described. The composite screen printing screen provided by the embodiment of the utility model includes a frame 1, a first screen 2, a second screen 3 and a third screen 4. The frame 1 is an aluminum frame. A square first window 5 is formed inside the frame 1. The first screen 2 is stretched in the first window 5. The outer edge of the first screen 2 is connected to the frame 1. The first screen 2 is adjacent to the frame 1 and is provided with a first connection area 7 for connecting to the frame 1. A square second window 6 is provided in the central part of the first screen 2. The second screen 3 is provided at a position corresponding to the second window 6 on the first screen 2, and the outer edge of the second screen 3 is overlapped on the inner edge of the first screen 2, so that the outer edge of the second screen 3 and the inner edge of the first screen 2 form an overlapping second connection area 8. The third wire mesh 4 is stacked on the second wire mesh 3 at a position corresponding to the second window 6, and the area of the third wire mesh 4 is smaller than the area of the second window 6, the area of the second wire mesh 3 is larger than the area of the second window 6, and the outer edge of the third wire mesh 4 is spaced a certain distance from the inner edge of the first wire mesh 2. The first wire mesh 2 is a tensioning wire mesh used to tension the second wire mesh 3 and / or the third wire mesh 4 in the circumferential direction and provide resilience to the second wire mesh 3 and / or the third wire mesh 4, the third wire mesh 4 is a high-mesh fine-wire steel wire mesh, and the second wire mesh 3 is a low-mesh thick-wire steel wire mesh with a mesh lower than the third wire mesh 4 and a wire diameter larger than the third wire mesh 4.

[0036] Compared with the prior art, the composite screen printing screen provided by the embodiment of the utility model has a tensioned wire mesh stretched in the frame 1, a low-mesh thick-wire steel mesh is arranged at the position corresponding to the second window 6 on the tensioned wire mesh, and a high-mesh thin-wire steel mesh is stacked at the position corresponding to the second window 6 on the low-mesh thick-wire steel mesh, so that the stacked composite high-mesh thin-wire steel mesh and low-mesh thick-wire steel mesh are arranged in the graphic printing area to form a composite screen, which not only effectively overcomes the defect that the high-mesh steel mesh has insufficient tensile strength and is prone to wire breakage, but also can increase the overall area of the composite screen by using the low-mesh thick-wire steel mesh whose area is larger than that of the high-mesh thin-wire steel mesh, so as to further improve the overall tensile strength of the composite screen, ensure the uniform tension stability and rebound consistency of the composite screen when being squeezed by the scraper, thereby reducing the probability of wire breakage and reducing the explosion rate of the high-mesh thin-wire screen printing screen.

[0037] In some embodiments, the stretched wire mesh is a polyester mesh with good flexibility and resilience, through which a high-mesh fine-wire steel wire mesh and / or a low-mesh thick-wire steel wire mesh are stretched circumferentially, and resilience is provided to the high-mesh fine-wire steel wire mesh and / or the low-mesh thick-wire steel wire mesh. The mesh number of the polyester mesh is 180-200 meshes, and the wire diameter of the polyester mesh is 50-55 microns.

[0038] In some embodiments, the mesh number of the low-mesh and thick-wire-diameter steel wire mesh is 360-400 meshes, and the wire diameter of the low-mesh and thick-wire-diameter steel wire mesh is 13-18 microns.

[0039] In some embodiments, the mesh number of the high-mesh and fine-wire steel wire mesh is 480-520 meshes, and the wire diameter of the high-mesh and fine-wire steel wire mesh is 8-11 microns.

[0040] In some of the embodiments, the overlapping parts of the high-mesh fine-wire steel wire mesh and the low-mesh thick-wire steel wire mesh are connected by hot-melt welding, so that the high-mesh fine-wire steel wire mesh and the low-mesh thick-wire steel wire mesh are combined to form a composite screen. This not only effectively overcomes the defect of high-mesh steel wire mesh with insufficient tensile strength and easy wire breakage, but also increases the overall area of the composite screen through the low-mesh thick-wire steel wire mesh, ensuring the uniform tension stability and rebound consistency of the composite screen when squeezed by the scraper, thereby reducing the probability of wire breakage.

[0041] Please refer to Figure 1 and Figure 4 In some embodiments, the composite screen printing screen further comprises a hot melt adhesive film 9 coated on the first screen 2, and the hot melt adhesive film 9 comprises a hot melt composite area 91 located at the overlapping portion of the first screen 2 and the second screen 3 and a hot melt adhesive coating area 92 adjacent to the hot melt composite area 91. In this embodiment, the first screen 2 is a polyester screen, and a layer of hot melt adhesive film 9 is coated on the polyester screen to prevent the conductive paste from leaking from the mesh of the polyester screen.

[0042] Please refer to Figure 1 and Figure 4In some embodiments, the outer size of the hot melt adhesive coating area 92 is smaller than the outer size of the first screen 2, so a stress release area can be formed by the hot melt adhesive film 9 located at the outer periphery of the hot melt adhesive coating area 92 and the first screen 2 (polyester screen) located at the edge of the frame, so that the stress borne by the composite screen when being squeezed by the scraper bar can be released by the polyester screen in the stress release area, so that the composite screen can be effectively rebounded, thereby reducing the probability of wire breakage of the composite screen, thereby reducing the screen burst rate of the composite screen containing high-mesh fine-wire steel screen and low-mesh thick-wire steel screen, thereby extending the service life of the composite screen containing high-mesh fine-wire steel screen and low-mesh thick-wire steel screen, and improving the quality of screen printing. Specifically, the hot melt adhesive film 9 is a PET film. It should be noted that a PET film with a thickness of 120 to 180 microns is used to perform hot melt compounding at a temperature of 120 to 140°C, so that a high-mesh fine-wire steel wire mesh is hot melt compounded with a low-mesh thick-wire steel wire mesh, and the outer edge of the low-mesh thick-wire steel wire mesh is hot melt compounded with the inner edge of the polyester mesh. In addition, a stepped hot melt design is used at the outer edge of the low-mesh thick-wire steel wire mesh to enhance printing stability, thereby increasing the printing life of the product.

[0043] Please refer to Figure 1 , Figure 3 , Figure 4 and Figure 5 In some embodiments, the first screen 2 is provided with a first connection area 7 at a portion adjacent to the frame 1, and the second screen 3 and the first screen 2 overlap to form a second connection area 8, which is a hot melt composite area 91, and the hardness of the first connection area 7 is less than that of the second connection area 8. Since the second connection area 8 has a relatively large hardness and strength, the composite screen including the high-mesh fine-wire steel screen and the low-mesh thick-wire steel screen has a stable and reliable connection effect, which can prevent the composite screen from being squeezed by the scraper during the printing process, resulting in the composite screen and the polyester screen being broken. At the same time, the pressure of the scraper on the composite screen will cause the polyester screen to be in a tight state, and the internal stress of the polyester screen will increase. The texture of the first connection area 7 is softer and weaker than that of the second connection area 8, so that the increased stress inside the polyester screen can be released through the first connection area 7, thereby preventing the polyester screen from breaking.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite screen printing screen, characterized in that: include: A frame body having a first window formed therein; A first screen is stretched in the first window, the outer edge of the first screen is connected to the frame, and a second window is opened in the center of the first screen; A second screen is arranged on the first screen at a position corresponding to the second window, and an outer edge of the second screen overlaps an inner edge of the first screen; as well as a third screen, superimposed on the second screen at a position corresponding to the second window, and the area of the third screen is smaller than the area of the second window; Wherein, the first wire mesh is a tensioned wire mesh used for tensioning the second wire mesh and / or the third wire mesh in the circumferential direction and providing resilience to the second wire mesh and / or the third wire mesh, the third wire mesh is a high-mesh and fine-wire steel wire mesh, and the second wire mesh is a low-mesh and coarse-wire steel wire mesh with a mesh lower than that of the third wire mesh and a wire diameter larger than that of the third wire mesh.

2. The composite screen printing screen as claimed in claim 1, characterized in that: The tensioned wire mesh is a polyester mesh.

3. The composite screen printing screen as claimed in claim 1, characterized in that: The mesh number of the low-mesh and thick-wire-diameter steel wire mesh is 360-400 meshes, and the wire diameter of the low-mesh and thick-wire-diameter steel wire mesh is 13-18 microns.

4. The composite screen printing screen as claimed in claim 1, characterized in that: The mesh number of the high-mesh and fine-wire steel wire mesh is 480-520 meshes, and the wire diameter of the high-mesh and fine-wire steel wire mesh is 8-11 microns.

5. The composite screen printing screen as claimed in claim 1, characterized in that: The overlapping parts of the high-mesh and fine-wire steel wire mesh and the low-mesh and thick-wire steel wire mesh are connected by hot-melt welding.

6. The composite screen printing screen as claimed in claim 1, characterized in that: The composite screen printing screen also includes a hot melt adhesive film coated on the first screen, and the hot melt adhesive film includes a hot melt composite area located at the overlapping part of the first screen and the second screen and a hot melt adhesive coating area adjacent to the hot melt composite area.

7. The composite screen printing screen as claimed in claim 6, characterized in that: The outer dimension of the hot melt adhesive coating area is smaller than the outer dimension of the first screen, so that the hot melt adhesive film located at the outer periphery of the hot melt adhesive coating area and the first screen located at the edge of the frame form a stress release area.

8. The composite screen printing screen as claimed in claim 6, characterized in that: The hot melt adhesive film is a PET film.

9. The composite screen printing screen as claimed in claim 1, characterized in that: A first connection area is provided at a portion of the first wire mesh adjacent to the frame, a second connection area is formed at a portion where the second wire mesh overlaps with the first wire mesh, and hardness of the first connection area is less than hardness of the second connection area.

10. The composite screen printing screen according to any one of claims 1 to 9, characterized in that: The frame is an aluminum frame.