Screen and glue printing equipment

Abstract

This utility model discloses a screen printing plate and an adhesive printing device. The screen printing plate includes a screen printing plate body with multiple through holes spaced apart. Each through hole has a hollow portion, and multiple hollow holes are formed on the hollow portion. The hollow holes connect with the through holes to penetrate the screen printing plate body along its thickness direction. According to the screen printing plate of this utility model, the effective passage area of ​​the adhesive is limited by both the hollow holes and the through holes, which can precisely control the landing point and amount of adhesive, achieve precise adhesive distribution, ensure strong adhesion between substrates such as battery cells, and ensure that the substrates such as battery cells are quickly bonded and fixed. At the same time, it makes the screen tension more uniform, reduces the probability of deformation during screen use, and improves the service life of the screen printing plate.

Description

Technical Field

[0001] This utility model relates to the field of screen printing technology, and in particular to a screen printing plate and printing equipment. Background Technology

[0002] In the photovoltaic industry, current OBB (Out-of-Bus) technology, whether employing a technique of welding first and then applying adhesive (UV adhesive) or applying adhesive first (thermosetting adhesive) and then welding, all utilize adhesive printing technology. In these technologies, steel printing screens are commonly used; however, these screens suffer from problems such as susceptibility to irreversible deformation and low precision in controlling the amount of adhesive applied. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a screen printing plate that can precisely control the application point and amount of adhesive, achieving accurate adhesive distribution, while simultaneously ensuring more uniform screen tension, reducing the probability of screen deformation, and increasing the screen's service life.

[0004] Another objective of this invention is to provide a printing device.

[0005] According to a first aspect of the present invention, a screen printing plate includes: a screen printing plate body, the screen printing plate body having a plurality of through holes spaced apart, each of the through holes having a hollow portion, the hollow portion having a plurality of hollow holes spaced apart, the hollow holes communicating with the through holes to penetrate the screen printing plate body along the thickness direction of the screen printing plate body.

[0006] According to the screen printing plate of this utility model embodiment, the effective passage area of ​​the adhesive is limited by both the perforated holes and the through holes, which can accurately control the landing point and amount of adhesive, achieve precise adhesive distribution, ensure that the bonding between the substrates such as battery cells is firm and the amount of adhesive is moderate, so that the substrates such as battery cells can be quickly bonded and fixed. At the same time, the screen tension is more uniform, reducing the probability of deformation during the use of the screen printing plate and improving the service life of the screen printing plate.

[0007] According to some embodiments of the present invention, the thickness of the mesh body at the hollowed-out portion is less than the thickness of the mesh body at the non-hollowed-out portion.

[0008] According to some embodiments of the present invention, the thickness of the screen printing body in the non-cutout portion is H, and the thickness of the screen printing body in the cutout portion is h, wherein H and h satisfy: 1 / 3≤h / H≤1 / 2.

[0009] According to some embodiments of the present invention, the thickness of the mesh body at the hollowed-out portion is h, wherein h satisfies: 100μm≤h≤300μm.

[0010] According to some embodiments of the present invention, one side surface of the mesh body at the hollowed-out portion is flush with the corresponding side surface of the mesh body at the non-hollowed-out portion.

[0011] According to some embodiments of the present invention, the sum of the cross-sectional areas of the plurality of hollow holes in each hollow part is S1, and the cross-sectional area of ​​the hollow part is S2, wherein S1 and S2 satisfy: 1 / 3S2≤S1≤2 / 3S2.

[0012] According to some embodiments of this utility model, the hollow hole is a polygonal hole, the minimum distance between two adjacent hollow holes is L1, and the diameter of the circumscribed circle of the hollow hole is D, wherein L1 and D satisfy: 1 / 4D≤L1≤1 / 2D.

[0013] According to some embodiments of this utility model, the hollow hole is a polygonal hole, the minimum distance between the hollow hole located at the edge of the hollow part and the edge of the hollow part is L2, and the diameter of the circumscribed circle of the hollow hole is D, wherein L2 and D satisfy: 1 / 4D≤L2≤1 / 2D.

[0014] According to some embodiments of this utility model, the hollow hole is a polygonal hole, and the diameter of the circumscribed circle of the hollow hole is D, wherein D satisfies: 20μm≤D≤80μm.

[0015] According to some embodiments of this utility model, the plurality of the hollow holes are arranged in an array.

[0016] According to some embodiments of the present invention, the arrangement direction of the plurality of hollow holes is parallel to the arrangement direction of the plurality of through holes.

[0017] According to some embodiments of this utility model, the hollow hole is a polygonal hole, and the two adjacent sides of the hollow hole are rounded.

[0018] According to some embodiments of the present invention, the hollow hole includes at least one of a round hole, an elliptical hole, an oblong hole, a triangular hole, a rectangular hole, and a hexagonal hole.

[0019] According to some embodiments of this utility model, the through hole is rectangular in shape, the length of the through hole is L, and the width of the through hole is W, wherein L and W respectively satisfy: 0.5mm≤L≤5mm, 0.1mm≤W≤3mm.

[0020] The printing apparatus according to a second aspect of the present invention includes the screen printing plate described in the first aspect of the present invention.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a schematic diagram of a screen printing plate according to an embodiment of the present utility model;

[0024] Figure 2 This is a partial structural schematic diagram of the screen printing plate according to an embodiment of the present utility model;

[0025] Figure 3 This is a cross-sectional view of the web version body according to an embodiment of the present utility model.

[0026] Figure label:

[0027] 100: Web version;

[0028] 10: Mesh version body; 11: Through hole; 111: Hollow part; 1111: Hollow hole. Detailed Implementation

[0029] The following is for reference. Figures 1-3 The screen printing plate 100 according to a first aspect embodiment of the present invention is described.

[0030] like Figures 1-3 As shown, the screen printing plate 100 according to the first aspect of the present invention includes a screen printing plate body 10.

[0031] Specifically, the screen printing body 10 has a plurality of through holes 11 spaced apart, each through hole 11 having a hollow portion 111, and the hollow portion 111 having a plurality of hollow holes 1111 spaced apart, the hollow holes 1111 communicating with the through holes 11 along the thickness direction of the screen printing body 10 (e.g., Figure 1 (The vertical direction) penetrates the mesh body 10. In the description of this utility model, "multiple" means two or more. The hollow part 111 can be provided at one axial end of the through hole 11 or at a position away from the axial end of the through hole 11.

[0032] For example, in Figure 2 and Figure 3In the example, along the thickness direction of the screen printing body 10, the perforated holes 1111 and the through holes 11 are interconnected. This facilitates the flow of adhesive along the perforated holes 1111 and the through holes 11, allowing it to drip onto the substrate such as the solar cell. Thus, the screen printing body 10 can carry and transfer adhesive. For example, adhesive can be squeezed through the perforated holes 1111 and the through holes 11 and transferred onto the substrate such as the solar cell using a tool such as a scraper, forming multiple adhesive dots on the surface of the substrate. This facilitates the connection between the substrate and other components, helps control the adhesive dots to avoid functional areas on the substrate, and improves the mass production of photovoltaic modules using the aforementioned solar cells, enhancing the uniformity of the manufacturing quality of photovoltaic modules using the aforementioned solar cells.

[0033] The effective penetration area of ​​the adhesive is limited by both the perforated holes 1111 and the through holes 11, allowing for precise control of the adhesive's application point and amount. This ensures accurate adhesive distribution, guaranteeing strong adhesion between substrates such as battery cells and a moderate amount of adhesive, enabling rapid bonding and fixation of these substrates to other components. Simultaneously, by avoiding excessive spread of the adhesive on the substrates, the thickness of the adhesive on the battery cells is effectively increased, thereby improving printing accuracy and reducing overall adhesive usage. Furthermore, it prevents excessive stress concentration within the perforated holes 1111, resulting in more uniform overall tension on the screen 100 and reducing the probability of deformation of the perforated holes 1111, thus extending the lifespan of the screen 100.

[0034] The design of the perforated holes 1111 on the screen 100 increases the contact area between the adhesive and the screen body 10. Compared with the traditional screen design, it avoids excessive stress concentration at the position of the screen body 10 corresponding to the through holes 11, making the tension of the screen 100 more uniform, reducing the probability of deformation during use, and improving the service life of the screen 100.

[0035] According to the screen printing plate 100 of this utility model embodiment, the effective passing area of ​​the adhesive is limited by both the perforated hole 1111 and the through hole 11, which can accurately control the landing point and amount of adhesive, achieve precise adhesive distribution, ensure that the bonding between the substrates such as battery cells is firm and the amount of adhesive is moderate, so that the substrates such as battery cells can be quickly bonded and fixed. At the same time, the tension of the screen printing plate 100 is relatively uniform, reducing the probability of deformation of the screen printing plate 100 during use and improving the service life of the screen printing plate 100.

[0036] According to some embodiments of this utility model, refer to Figure 3 The thickness of the screen printing plate 10 at the perforated portion 111 is less than the thickness of the screen printing plate 10 at the non-perforated portion 111. This reduces the path of the adhesive through the perforated holes 1111, which helps to improve the adhesive throughput, ensure the amount of adhesive, and extend the service life of the screen printing plate 100.

[0037] According to some embodiments of this utility model, refer to Figure 3 The thickness of the screen printing body 10 at the non-perforated portion 111 is H, and the thickness of the screen printing body 10 at the perforated portion 111 is h, where H and h satisfy: 1 / 3 ≤ h / H ≤ 1 / 2. Therefore, limiting the thickness of the perforated portion 111 to the thickness of the screen printing body 10 at the non-perforated portion 111 is reasonable. This satisfies the structural strength requirements of the screen printing body 10 at the perforated portion 111 while avoiding excessive thickness in the perforated portion 111, which would increase the resistance to glue flow and thus improve glue flow efficiency.

[0038] According to some specific embodiments of this utility model, refer to Figure 3 The thickness of the screen printing body 10 at the cutout portion 111 is h, where h satisfies: 100μm ≤ h ≤ 300μm. When the thickness of the screen printing body 10 at the cutout portion 111 is less than 100μm, the thickness of the cutout portion 111 is too small, making it easily deformed by glue pressure during use, thus shortening the service life of the screen printing body 100. When the thickness of the screen printing body 10 at the cutout portion 111 is greater than 300μm, the thickness of the cutout portion 111 is too large, thus increasing the difficulty of glue passage and reducing glue passage efficiency. Therefore, by setting the thickness of the screen printing body 10 at the cutout portion 111 to 100μm ≤ h ≤ 300μm, the structural strength requirements of the screen printing body 10 at the cutout portion 111 are met, while also ensuring the efficiency of glue passage through the cutout portion 111.

[0039] According to some other embodiments of the present invention, refer to Figure 3 The surface of the screen printing body 10 at the cutout portion 111 is flush with the corresponding surface of the screen printing body 10 at the non-cutout portion 111. That is, along the thickness direction of the screen printing body 10, the cutout portion 111 is located on one side of the thickness direction of the screen printing body 10, so that the surface of the screen printing body 10 at the cutout portion 111 is flush with the corresponding surface of the screen printing body 10 at the non-cutout portion 111. In actual use, the adhesive first passes through the cutout hole 1111 and then enters the through hole 11. The cutout hole 1111 restricts the area of ​​the adhesive to be spread relatively small, resulting in a higher adhesive dot height. This facilitates the connection of the battery cells and other substrates to the gaps between them, thereby improving the adhesive strength per unit area. Simultaneously, the through hole 11 is opposite to the cutout portion 111, thus limiting the area of ​​the adhesive spread. This keeps the adhesive dots within the range defined by the through hole 11, preventing adhesive overflow from affecting battery performance.

[0040] According to some embodiments of the present invention, the sum of the cross-sectional areas of the plurality of perforated holes 1111 in each perforated portion 111 is S1, and the cross-sectional area of ​​the perforated portion 111 is S2, wherein S1 and S2 satisfy: 1 / 3S2≤S1≤2 / 3S2. That is, the porosity of the perforation is 1 / 3 to 2 / 3 (including the endpoint value), thereby ensuring the amount of glue passing through the perforated portion 111 while avoiding deformation of the perforated portion 111 during use, thus helping to ensure the structural strength of the screen 100 and extend the service life of the screen 100.

[0041] According to some other embodiments of the present invention, referring to Figure 2 The perforated holes 1111 are polygonal holes, with a minimum distance L1 between two adjacent perforated holes 1111. The diameter of the circumscribed circle of each perforated hole 1111 is D, where L1 and D satisfy: 1 / 4D ≤ L1 ≤ 1 / 2D. The perforated holes 1111 can be quadrilateral, pentagonal, or hexagonal; no specific limitation is made here. The polygonal perforated hole design 1111 allows the adhesive to pass smoothly while further ensuring the uniformity of tension on the screen 100, resulting in more uniform adhesive dots and easier control of the adhesive printing amount. The limitation on the minimum distance between two adjacent perforated holes 1111 is reasonable, dispersing the force exerted on the adhesive during passage, ensuring the structural stability of the perforated portion 111, preventing deformation or breakage, thereby improving the reliability of the screen 100 and extending its service life.

[0042] According to some embodiments of this utility model, refer to Figure 2 The perforated hole 1111 is a polygonal hole. The minimum distance between the perforated hole 1111 located at the edge of the perforated part 111 and the edge of the perforated part 111 is L2. The diameter of the circumscribed circle of the perforated hole 1111 is D, where L2 and D satisfy: 1 / 4D≤L2≤1 / 2D. The distance between the perforated hole 1111 closest to the edge of the perforated part 111 and the edge of the perforated part 111 is reasonable, thereby ensuring the overall reliability of the perforated part 111 and preventing deformation or breakage of the edge of the perforated part 111 when glue passes through the perforated hole 1111 closest to the edge. This further increases the structural stability of the screen 100 and extends the service life of the screen 100.

[0043] According to some embodiments of this utility model, the perforated hole 1111 is a polygonal hole, and the diameter of the circumscribed circle of the perforated hole 1111 is D, where D satisfies: 20μm≤D≤80μm. The size limitation of the circumscribed circle of the perforated hole 1111 is relatively reasonable, thus the size of the perforated hole 1111 is relatively reasonable, limiting the maximum span of the perforated hole 1111, determining the side length and upper limit of the diagonal of the polygonal hole, thereby suitable for meeting the usage requirements of the perforated hole 1111.

[0044] According to some embodiments of this utility model, refer to Figure 2 Multiple perforated holes 1111 are arranged in an array. Thus, without significantly reducing the structural performance, the perforated holes 1111 are arranged in a reasonable manner, which can balance the force on the perforated part 111, avoid a sudden drop in local strength of the perforated part 111, and reduce the local stress peak of the perforated part 111 through the "dispersion effect".

[0045] In some optional embodiments, the arrangement direction of the plurality of perforated holes 1111 is parallel to the arrangement direction of the plurality of through holes 11. This ensures that the arrangement directions of the plurality of perforated holes 1111 and the plurality of through holes 11 are consistent, which facilitates the dispersion of forces and avoids localized stress concentration that could lead to deformation or breakage of the perforated portion 111. This, in turn, helps to improve the structural strength of the screen printing plate 100 and extend its service life.

[0046] Furthermore, the perforated hole 1111 is a polygonal hole, with rounded corners between adjacent sides. The included angle between adjacent sides of the perforated hole 1111 is also designed as a rounded chamfer to prevent glue from getting stuck in the included angle between adjacent sides of the perforated hole 1111, thereby improving the glue throughput and ensuring the effectiveness of the screen 100.

[0047] In some alternative embodiments, the perforation 1111 includes at least one of a round hole, an elliptical hole, an oblong hole, a triangular hole, a rectangular hole, and a hexagonal hole. The shape of the perforation 1111 can be selected according to the characteristics of the adhesive to maximize the efficiency of adhesive passage through the perforation 1111.

[0048] Furthermore, the through-hole 11 is rectangular in shape, with a length of L and a width of W, wherein L and W satisfy the following conditions: 0.5mm≤L≤5mm and 0.1mm≤W≤3mm, respectively. The reasonable limitation of the length and width of the through-hole 11 facilitates the standardized formation of adhesive dots that avoid the functional areas of the substrate such as the battery cell, while ensuring that the area where the adhesive dots are formed is suitable for bonding the substrate such as the battery cell to other components.

[0049] The printing apparatus according to a second aspect of the present invention includes the screen printing plate 100 described in the first aspect of the present invention.

[0050] The printing equipment according to the embodiments of this utility model improves the production efficiency of the printing equipment, and at the same time, facilitates the batch printing of printing equipment, improves the uniformity of printing, and thus improves the utilization efficiency of the printing equipment.

[0051] Other components and operations of the printing apparatus according to embodiments of this utility model are known to those skilled in the art and will not be described in detail here. In the description of this utility model, it should be understood that terms such as "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0052] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0054] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A screen, characterized by, include: A screen printing body has a plurality of through holes spaced apart, each through hole having a hollow portion, and the hollow portion having a plurality of hollow holes spaced apart, the hollow holes communicating with the through holes to penetrate the screen printing body along the thickness direction of the screen printing body.

2. The screen printing screen of claim 1, wherein The thickness of the mesh body at the hollowed-out portion is less than the thickness of the mesh body at the non-hollowed-out portion.

3. The screen printing screen of claim 1, wherein The thickness of the screen-printed body in the non-cutout portion is H, and the thickness of the screen-printed body in the cutout portion is h, wherein H and h satisfy: 1 / 3≤h / H≤1 / 2.

4. The screen printing screen of claim 1, wherein The thickness of the mesh body at the hollowed-out portion is h, wherein h satisfies: 100μm≤h≤300μm.

5. The screen printing screen of claim 1, wherein The side surface of the screen-printed body at the hollowed-out portion is flush with the corresponding side surface of the screen-printed body at the non-hollowed-out portion.

6. The screen printing screen of claim 1, wherein The sum of the cross-sectional areas of the plurality of hollow holes in each hollow part is S1, and the cross-sectional area of ​​the hollow part is S2, wherein S1 and S2 satisfy: 1 / 3S2≤S1≤2 / 3S2.

7. The screen printing plate according to claim 1, characterized in that, The perforated hole is a polygonal hole, the minimum distance between two adjacent perforated holes is L1, and the diameter of the circumscribed circle of the perforated hole is D. Wherein, L1 and D satisfy: 1 / 4D≤L1≤1 / 2D.

8. The screen printing plate according to claim 1, characterized in that, The perforated hole is a polygonal hole. The minimum distance between the perforated hole located at the edge of the perforated part and the edge of the perforated part is L2. The diameter of the circumscribed circle of the perforated hole is D. Wherein, L2 and D satisfy: 1 / 4D≤L2≤1 / 2D.

9. The screen printing plate according to claim 1, characterized in that, The perforated hole is a polygonal hole, and the diameter of the circumscribed circle of the perforated hole is D, wherein D satisfies: 20μm≤D≤80μm.

10. The screen printing plate according to claim 1, characterized in that, The multiple perforated holes are arranged in an array.

11. The screen printing plate according to claim 1, characterized in that, The arrangement direction of the plurality of hollow holes is parallel to the arrangement direction of the plurality of through holes.

12. The screen printing plate according to claim 1, characterized in that, The perforated hole is a polygonal hole, and the two adjacent sides of the perforated hole are rounded.

13. The screen printing plate according to claim 1, characterized in that, The perforated hole includes at least one of the following: round hole, elliptical hole, oblong hole, triangular hole, rectangular hole, and hexagonal hole.

14. The screen printing plate according to any one of claims 1-13, characterized in that, The through hole is rectangular in shape, with a length of L and a width of W, wherein L and W satisfy the following conditions: 0.5mm≤L≤5mm and 0.1mm≤W≤3mm, respectively.

15. A printing apparatus, characterized in that, Includes the screen printing as described in any one of claims 1-14.

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