Glue printing device and printing equipment
By designing a multi-level screen and reset components, the problem of uneven glue distribution caused by screen deformation and temperature changes in UV glue printing was solved, achieving a highly efficient and uniform glue printing effect, and improving the ribbon fixing effect and production efficiency of photovoltaic cells.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2026-03-13
Smart Images
Figure CN121650334A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of printing equipment technology, and more particularly to an adhesive printing apparatus and printing equipment. Background Technology
[0002] In the photovoltaic industry, when OBB (busbar-less) solar cells are carefully connected in series or parallel to construct high-efficiency modules, a crucial process step is the use of printed UV adhesive (shadowless adhesive). This technology not only innovatively solves the problem of solder ribbon fixation but also effectively prevents solder ribbon displacement in subsequent processes by using UV adhesive as a third-party stabilizing medium for the solder ribbon. This achieves a stabilizing effect similar to pad points, thereby significantly improving the overall performance and reliability of the module.
[0003] In the specific implementation of UV adhesive printing, squeegee printing is widely used due to its high efficiency and precision. However, this process is also accompanied by a series of challenges that require careful attention. First, the close cooperation between the squeegee and the screen is crucial for the uniform distribution of adhesive, but continuous squeezing can cause slight deformation in the central area of the screen. Although this deformation is difficult to detect, it is enough to affect the uniformity of adhesive distribution, which may in turn affect the bonding effect of the solder ribbon.
[0004] Furthermore, the performance of UV adhesives is highly sensitive to ambient temperature. As the temperature inside the production workshop rises, the viscosity of the adhesive gradually decreases, directly affecting its flowability. Adhesive with reduced viscosity is more likely to clump towards the center under the action of the squeegee, forming what is known as "adhesive clumping." This not only results in an excessively thick adhesive coating in the central area of the solar cell, affecting aesthetics and subsequent processes, but also leads to insufficient adhesive supply in the edge areas. Over time, this will cause a large amount of adhesive to accumulate in the center of the screen without being effectively utilized, increasing production costs and reducing production efficiency. Summary of the Invention
[0005] In view of this, the purpose of the present invention is to overcome the shortcomings of the related art, and the present invention provides an adhesive printing apparatus and printing equipment.
[0006] This invention provides the following technical solution:
[0007] An adhesive printing apparatus includes a screen and a reset assembly.
[0008] The screen printing plate has n levels, where n is a natural number and n≥2; the (n-1)th level screen printing plate has mounting holes, and the nth level screen printing plate is installed in the mounting holes of the (n-1)th level screen printing plate; the reset component is disposed between the mounting holes of the nth level screen printing plate and the (n-1)th level screen printing plate, and the reset component is used to drive the nth level screen printing plate to a position away from the (n-1)th level screen printing plate when it is not subjected to external force.
[0009] As a further improvement to the above technical solution, the thickness of the screen printing plate at level n is greater than the thickness of the screen printing plate at level n-1.
[0010] As a further improvement to the above technical solution, the value of n is 3; specifically, the screen printing includes a first-level screen printing, a second-level screen printing, and a third-level screen printing.
[0011] As a further improvement to the above technical solution, the thickness of the screen plate in the second stage is L1, and the thickness of the screen plate in the third stage is L2. The value ranges of L1 and L2 are 0.5mm≤L1≤0.9mm and 0.6mm≤L2≤1.0mm, respectively.
[0012] As a further improvement to the above technical solution, the reset component includes a reset spring, which is disposed between the bottom of the mounting hole of the nth level screen and the (n-1)th level screen.
[0013] As a further improvement to the above technical solution, the end face of the mounting hole of the nth level screen near the bottom of the (n-1)th level screen is provided with a reset hole corresponding to the reset spring, and the reset spring passes through the reset hole.
[0014] As a further improvement to the above technical solution, the bottom of the mounting hole of the (n-1)th level screen is provided with a guide post corresponding to the reset hole on the nth level screen, and the reset spring is sleeved on the guide post.
[0015] As a further improvement to the above technical solution, the stiffness of the reset spring is K, and the value range of K is: 0.25≤K≤0.35.
[0016] As a further improvement to the above technical solution, the mounting hole of the screen in the (n-1)th stage is provided with a limiting boss, and the outer side wall of the screen in the nth stage is provided with a mating step corresponding to the limiting boss.
[0017] As a further improvement to the above technical solution, the edges of the first-level screen are provided with a border.
[0018] The present invention also provides a printing apparatus, including an adhesive printing apparatus as described in any one of the above-described embodiments.
[0019] Compared with related technologies, the advantages of this invention are:
[0020] The adhesive printing apparatus provided by this invention requires the operator to inject UV adhesive into the adhesive storage area of the printing equipment during the preparation stage to meet the needs of subsequent continuous printing. Then, before officially starting the printing process, an appropriate amount of adhesive is added to the screen.
[0021] Next, the squeegee is placed against the center of the nth-level screen. As the squeegee gradually applies pressure, it not only effectively squeezes the adhesive on the central screen, promoting its even flow to both sides, but also exerts a certain squeezing effect on the reset components between the nth-level screen and the adjacent (n-1)th-level screen. This ensures that the upper surface of all screens remains level throughout the printing process, thus avoiding printing quality problems that may be caused by uneven screens. As the squeegee continues to move from the center of the screen to both sides, it applies a uniform scraping force to the adhesive. Simultaneously, the mesh structure on the screen acts as a natural filtering barrier, working in conjunction with the squeegee surface to guide the adhesive into a unique reverse rolling state on the screen surface. This rolling effect not only helps the adhesive distribute more evenly on the screen but also enhances its penetration and adhesion. When the adhesive flows to the perforated area on the screen, due to gravity and the special design of the mesh, the adhesive quickly penetrates the mesh and accurately contacts the surface of the printing substrate (such as a photovoltaic cell) below. As the squeegee continues to move forward, the adhesive gradually separates from the screen under the combined influence of the screen tension and the preset clearance, and adheres firmly to the printing substrate, thus achieving a high-quality printing effect.
[0022] It's worth noting that after completing a printing cycle, the reset component immediately initiates its operating procedure, restoring each level of the screen to its initial raised state. This design not only facilitates preparation for the next printing cycle but also fully utilizes the height difference between the screens. During repeated printing, the squeegee prioritizes scraping and printing the adhesive on the top nth level screen, ensuring that every area of the screen receives timely and sufficient use of the adhesive.
[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of the adhesive printing apparatus from one perspective in one embodiment of the present invention;
[0026] Figure 2 A partial schematic diagram of an adhesive printing apparatus according to one embodiment of the present invention is shown.
[0027] Explanation of key component symbols:
[0028] 100 - Screen printing plate; 110 - Level 1 screen printing plate; 111 - Frame; 120 - Level 2 screen printing plate; 121 - Mounting hole; 122 - Guide post; 123 - Limiting boss; 130 - Level 3 screen printing plate; 131 - Reset hole; 132 - Mating step; 200 - Reset assembly; 210 - Reset spring; 300 - Scraper. Detailed Implementation
[0029] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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 invention.
[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.
[0032] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0034] Example 1
[0035] like Figure 1 , Figure 2 As shown, this embodiment provides an adhesive printing apparatus, including a screen 100 and a reset assembly 200.
[0036] The screen printing plate 100 has n levels, where n is a natural number and n≥2; the (n-1)th level screen printing plate 100 has a mounting hole 121, and the nth level screen printing plate 100 is installed in the mounting hole 121 on the (n-1)th level screen printing plate 100; the reset component 200 is disposed between the mounting hole 121 of the nth level screen printing plate 100 and the (n-1)th level screen printing plate 100, and the reset component 200 is used to drive the nth level screen printing plate 100 to a position away from the (n-1)th level screen printing plate 100 when it is not subjected to external force.
[0037] In some specific embodiments, n is 3; specifically, the screen printing plate 100 includes a first-level screen printing plate 110, a second-level screen printing plate 120, and a third-level screen printing plate 130; the second-level screen printing plate 120 is disposed in the mounting hole 121 on the first-level screen printing plate 110, and the third-level screen printing plate 130 is disposed in the mounting hole 121 on the second-level screen printing plate 120; a reset component 200 is provided between the second-level screen printing plate 120 and the first-level screen printing plate 110, and between the third-level screen printing plate 130 and the second-level screen printing plate 120.
[0038] In the adhesive printing apparatus provided in this embodiment, during the preparation stage, the operator needs to inject UV adhesive into the adhesive storage area of the printing equipment to meet the requirements of subsequent continuous printing. Then, before officially starting the printing process, an appropriate amount of adhesive is added to the screen 100.
[0039] Next, the squeegee 300 abuts against the center of the third-level screen 130. As the squeegee 300 gradually applies pressure, it not only effectively squeezes the adhesive on the central screen 100, promoting its even flow to both sides, but also exerts a certain squeezing effect on the reset components 200 between the third-level screen 130 and the adjacent second-level screen 120, and between the second-level screen 120 and the adjacent first-level screen 110. This ensures that the upper surfaces of all screens 100 remain level throughout the printing process, thus avoiding printing quality problems that may result from unevenness of the screens 100. As the squeegee 300 continues to move from the center of the screen 100 to both sides, it applies a uniform scraping force to the adhesive. Simultaneously, the mesh structure on the screen 100 acts as a natural filtering barrier, working in conjunction with the squeegee 300 to guide the adhesive in a unique reverse rolling motion on the surface of the screen 100. This rolling effect not only helps the adhesive to be distributed more evenly on the screen 100, but also enhances the adhesive's penetration and adhesion. When the adhesive flows to the perforated area on the screen 100, due to gravity and the special design of the mesh, the adhesive quickly penetrates the mesh and accurately contacts the surface of the printing substrate (such as a photovoltaic cell) below. As the squeegee 300 continues to move forward, the adhesive gradually separates from the screen 100 under the combined influence of the screen tension and the preset clearance distance, and firmly adheres to the printing substrate, thus achieving a high-quality printing effect.
[0040] Furthermore, after completing a printing cycle, the reset component 200 immediately initiates its operating procedure, restoring each level of the screen 100 to its initial raised state. This design not only facilitates preparation for the next printing cycle but also fully utilizes the height difference effect between the screens 100. During repeated printing, the squeegee 300 prioritizes scraping and printing the adhesive on the uppermost nth level screen 100, ensuring that the adhesive on every part of the screen 100 is utilized promptly and fully.
[0041] In some specific embodiments, the thickness of the nth level screen 100 is greater than the thickness of the (n-1)th level screen 100, meaning the thickness of each level of screen 100 increases sequentially from the outside in. When the squeegee 300 applies pressure to this series of screens 100, due to differences in material properties and the mechanical transmission effect, the degree of deformation experienced by each level of screen 100 gradually intensifies starting from the outer layer. To effectively cope with and compensate for this gradually increasing deformation, a strategy of gradually increasing thickness is adopted between each level of screen 100.
[0042] Specifically, the outer screen 100 is relatively thin, allowing it to adapt more flexibly to the pressure of the squeegee 300. As it extends deeper into the interior, the thickness of the screen 100 gradually increases. This design not only enhances the structural stability of the inner screen 100, but more importantly, it provides precise compensation to the upper surfaces of each screen 100 level by generating additional support force through thickness differences when the screen 100 deforms under pressure. This compensation mechanism ensures that even under high pressure, all parts of the entire screen 100 system maintain relatively consistent flatness, thus avoiding printing unevenness caused by local depressions or protrusions.
[0043] In some specific embodiments, the thickness of the second-level screen 100 is L1, and the thickness of the third-level screen 100 is L2. The value ranges of L1 and L2 are 0.5mm≤L1≤0.9mm and 0.6mm≤L2≤1.0mm, respectively. This is to reduce the thickness of the screen 100 while ensuring the performance of each level of the screen 100, thereby reducing costs. Of course, other thicknesses can be used for each screen 100 according to specific production needs.
[0044] Specifically, in other embodiments of the present invention, the thickness of the second-level screen 100 can also be selected as 0.55mm, 0.57mm, 0.59mm, 0.63mm, 0.66mm, 0.71mm, 0.75mm, 0.79mm, 0.83mm, 0.85mm, 0.87mm, etc., and the thickness of the second-level screen 100 can also be selected as 0.63mm, 0.66mm, 0.71mm, 0.75mm, 0.79mm, 0.83mm, 0.85mm, 0.87mm, 0.91mm, 0.93mm, 0.95mm, 0.97mm, etc., which will not be elaborated here.
[0045] In some specific embodiments, the reset assembly 200 includes a reset spring 210, which is disposed between the bottom of the mounting holes 121 of the nth-level screen 100 and the (n-1)th-level screen 100. Multiple reset springs 210 are provided. When the nth-level screen 100 is subjected to an external force (such as pressure from the squeegee 300) and deforms, the reset spring 210 is compressed and stores energy. Once the external force is removed, the reset spring 210 utilizes its stored elastic potential energy to quickly and forcefully push the nth-level screen 100 back to its original position. This process is not only fast and efficient but also ensures that the screen 100 quickly returns to its initial state when no external force is applied, thereby maintaining the stability and consistency of the entire printing system.
[0046] In some specific embodiments, the end face of the nth-level screen 100 near the bottom of the mounting hole 121 of the (n-1)th-level screen 100 is provided with a reset hole 131 corresponding to the reset spring 210, and the reset spring 210 passes through the reset hole 131. The design of the reset hole 131 ingeniously solves the problem of possible displacement of the reset spring 210 during operation. By restricting the degree of freedom of the reset spring 210 in three-dimensional space, the reset hole 131 ensures that the spring can be compressed and extended along a predetermined axis, thereby effectively avoiding the risk of performance degradation or failure due to displacement. This design not only improves the overall stability of the reset assembly 200, but also further enhances its reliability, ensuring that the nth-level screen 100 can quickly and accurately return to its initial position in complex and ever-changing printing environments.
[0047] In some specific embodiments, the bottom of the mounting hole 121 of the n-1th level screen 100 is provided with a guide post 122 corresponding to the reset hole 131 on the nth level screen 100, and the reset spring 210 is sleeved on the guide post 122 to further guide the use of the reset spring 210.
[0048] In some specific embodiments, the stiffness of the return spring 210 is K, and the value of K ranges from 0.25 to 0.35. A lower stiffness value (close to 0.25) ensures that the return spring 210 has good flexibility when subjected to external forces, thereby allowing the screen 100 to undergo moderate deformation during the printing process to adapt to different printing requirements. However, too low stiffness may also lead to insufficient return force, affecting the rapid rebound of the screen 100.
[0049] Conversely, a higher stiffness value (close to 0.35) enhances the support and recovery capability of the return spring 210, enabling the screen 100 to quickly and stably return to its initial position after the external force is removed. However, excessive stiffness may also lead to an overly rigid system, which is not conducive to the flexible adjustment of the screen 100 under complex working conditions.
[0050] Therefore, the value of K is set between 0.25 and 0.35 to find a balance point that ensures both the flexibility and adaptability of the return spring 210 and its sufficient support and recovery capability. This design enables the return spring 210 to work stably under various printing conditions, providing strong support for the overall performance of the screen printing system 100.
[0051] Specifically, the stiffness value of the return spring 210 can also be selected as 0.26, 0.27, 0.29, 0.31, 0.34, etc., which will not be elaborated here.
[0052] In some specific embodiments, the mounting hole 121 of the (n-1)th level screen 100 is provided with a limiting boss 123, and the outer side wall of the nth level screen 100 is provided with a mating step 132 corresponding to the limiting boss 123. By limiting the position of the mating step 132 by the limiting boss 123, the relative displacement space between the nth level screen 100 and the (n-1)th level screen 100 can be limited, effectively preventing the mating of the nth level screen 100 and the (n-1)th level screen 100 from disengaging, and ensuring the reliability of this embodiment.
[0053] In some specific embodiments, the edge of the first-level screen 110 is provided with a border 111 to effectively block the adhesive. During the printing process, when the adhesive is applied to the screen 100, the border 111 can form a barrier to prevent the adhesive from flowing or overflowing and contaminating non-target areas, thereby ensuring the clarity and accuracy of the printed pattern.
[0054] Example 2
[0055] The present invention also provides a printing device, which can be divided into two types according to its application scenario: fully automatic device and semi-automatic device, including the glue printing device described in Example 1. The printing device has all the beneficial effects of the glue printing device, which will not be described in detail here.
[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is 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. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. An adhesive printing apparatus, characterized in that, include: A screen (100) is provided, wherein the screen (100) has n levels, where n is a natural number and n≥2; the (n-1)th level screen (100) is provided with mounting holes (121), and the nth level screen (100) is installed in the mounting holes (121) on the (n-1)th level screen (100); A reset assembly (200) is disposed between the mounting holes (121) of the nth-level screen printing plate (100) and the (n-1)th-level screen printing plate (100), the reset assembly (200) being used to drive the nth-level screen printing plate (100) to a position away from the (n-1)th-level screen printing plate (100) when not subjected to external force.
2. The adhesive printing apparatus according to claim 1, characterized in that, The thickness of the screen printing plate (100) at level n is greater than the thickness of the screen printing plate (100) at level n-1.
3. The adhesive printing apparatus according to claim 2, characterized in that, The value of n is 3.
4. The adhesive printing apparatus according to claim 3, characterized in that, The thickness of the screen (100) in the second stage is L1, and the thickness of the screen (100) in the third stage is L2. The value ranges of L1 and L2 are: 0.5mm≤L1≤0.9mm and 0.6mm≤L2≤1.0mm, respectively.
5. The adhesive printing apparatus according to claim 1, characterized in that, The reset assembly (200) includes a reset spring (210) disposed between the bottom of the mounting hole (121) of the nth-level screen (100) and the (n-1)th-level screen (100).
6. The adhesive printing apparatus according to claim 5, characterized in that, The nth-level screen (100) has a reset hole (131) corresponding to the reset spring (210) on the end face of the mounting hole (121) near the n-1th-level screen (100). The reset spring (210) passes through the reset hole (131).
7. The adhesive printing apparatus according to claim 6, characterized in that, The mounting hole (121) of the n-1 level screen (100) is provided with a guide post (122) corresponding to the reset hole (131) on the n-1 level screen (100), and the reset spring (210) is sleeved on the guide post (122).
8. The adhesive printing apparatus according to any one of claims 5 to 7, characterized in that, The stiffness of the reset spring (210) is K, and the value range of K is: 0.25≤K≤0.
35.
9. The adhesive printing apparatus according to any one of claims 1 to 7, characterized in that, The mounting hole (121) of the screen (100) of the n-1 level is provided with a limiting boss (123), and the outer side wall of the screen (100) of the n level is provided with a mating step (132) corresponding to the limiting boss (123).
10. A printing apparatus, characterized in that, Includes the glue printing apparatus as described in any one of claims 1 to 9.