Screen printing plate

Abstract

The utility model relates to the technical field of solar cell manufacturing, and provides a printing screen which comprises a first screen body and a second screen body which are arranged in a stacked mode, the second screen body is detachably connected to the first screen body, and a containing cavity is formed in the edge of the first screen body and / or the edge of the second screen body. The gauze is arranged between the first screen printing plate and the second screen printing plate, the gauze comprises a printing part and a plurality of connecting parts arranged on the peripheral side of the printing part, and printing windows used for exposing the printing part are formed in the first screen printing plate and the second screen printing plate; the tension sensor is arranged in the containing cavity and connected to one connecting part, and the other connecting parts are connected with the first screen printing plate and / or the second screen printing plate. According to the printing screen, the first screen body and the second screen body which are detachably connected are arranged, screen yarn replacement is facilitated when the screen is exploded, the tension of the screen yarn is monitored in real time through the tension sensor, and the problems that in the prior art, the screen tension cannot be monitored in the printing process, the phenomenon of sign-free screen explosion exists, the screen yarn cannot be replaced after the screen is exploded, and the screen is damaged are solved. The production efficiency is low; and the cost is high.

Description

Technical Field

[0001] This application belongs to the technical field of solar cell manufacturing, and more specifically, relates to a printing screen plate. Background Art

[0002] The production process of solar cells is the core of photovoltaic power generation. Its photoelectric conversion efficiency determines the competitiveness of products, and the production speed represents the economic benefits of photovoltaic enterprises. Since the development of solar cells to the present, technology has been continuously innovated and products have been rapidly iterated. The surface grid lines have played a crucial role. Whether it is high-temperature paste or low-temperature paste, in order to better transmit electrons and reduce the shading area, the development of grid lines tends to be in a healthy direction such as low resistance, multi-main grid, and fine sub-grid. Silk screen printing is an indispensable part of the photovoltaic industry and directly affects the development of the photovoltaic industry.

[0003] Currently, the silk screen printing process uses a sensorless disposable screen plate. During the printing process, the tension of the screen plate cannot be monitored, and there is a phenomenon of bursting without any obvious signs, which seriously depends on production personnel and often cannot be quickly processed on the production line, resulting in splashing of the paste, serious loss of raw materials, reduced production efficiency, and increased production losses. In addition, once the screen plate bursts, the screen yarn cannot be replaced, and the screen frame needs to be sent back to the manufacturer for re-manufacturing, which seriously affects the production efficiency and increases the production cost. Utility Model Content

[0004] The purpose of the embodiments of this application is to provide a printing screen plate to solve the problems existing in the related technologies: during the printing process, the tension of the screen plate cannot be monitored, there is a phenomenon of bursting without any obvious signs, and after bursting, the screen yarn cannot be replaced, resulting in low production efficiency and high production cost.

[0005] To achieve the above purpose, the technical solution adopted in the embodiments of this application is:

[0006] Provide a printing screen plate, including:

[0007] A first screen plate and a second screen plate which are stacked, the second screen plate is detachably connected to the first screen plate, and a receiving cavity is arranged inside the edge of the first screen plate and / or the second screen plate;

[0008] A screen yarn, arranged between the first screen plate and the second screen plate, the screen yarn includes a printing part and a plurality of connecting parts arranged on the periphery of the printing part, and printing windows for exposing the printing part are arranged on the first screen plate and the second screen plate;

[0009] A tension sensor, arranged in the receiving cavity, the tension sensor is connected to one of the connecting parts, and the remaining connecting parts are connected to the first screen plate and / or the second screen plate.

[0010] In one embodiment, the printing stencil further includes a plurality of elastic connectors disposed in the accommodating cavity, and the plurality of elastic connectors are respectively connected to the plurality of connecting portions one by one.

[0011] In one embodiment, the mesh fabric is a cross-shaped mesh fabric, the printing portion is rectangular, the number of the connecting portions is four, and the four connecting portions are respectively located on different sides of the printing portion.

[0012] In one embodiment, a rectangular window is opened at the center of the first stencil and the center of the second stencil. After the first stencil and the second stencil are connected, the rectangular window opened on the first stencil and the rectangular window opened on the second stencil are opposite to each other and form the printing window.

[0013] In one embodiment, both the first stencil and the second stencil include a connected metal frame and a metal mesh. The accommodating cavity is disposed in the metal frame, and the metal mesh is attached to the connecting portion.

[0014] In one embodiment, the printing stencil further includes a protective member wrapping the first stencil and the second stencil. The protective member is attached to the connecting portion to isolate the first stencil, the second stencil from the connecting portion.

[0015] In one embodiment, a groove is opened on one side of the protective member facing the connecting portion.

[0016] In one embodiment, the inner diameter of the groove gradually increases along the direction facing the connecting portion.

[0017] In one embodiment, the protective member includes a transparent resin and an elastic buffer rubber.

[0018] In one embodiment, the printing stencil further includes a peripheral device electrically connected to the tension sensor. The peripheral device includes a power supply, a display screen, a signal transmission member and a processor.

[0019] The printing stencil provided by the embodiment of the present application has at least the following beneficial effects: By laminating and detachably connecting the first stencil and the second stencil, and the mesh fabric disposed between the first stencil and the second stencil, it is convenient to quickly replace the mesh fabric when the plate bursts. In addition, the tension sensor can be used to monitor the tension of the mesh fabric in real time to determine whether the mesh fabric meets the requirements for normal printing, which can prevent the slurry from splashing, reduce production losses, improve production efficiency, maintain the stability of the production line, improve the automation degree of the production line, reduce the dependence on the needs of production personnel, reduce production costs, and improve economic benefits. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or exemplary technical descriptions. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 Top view of the printing stencil provided by the embodiment of the present application;

[0022] Figure 2 Top view of the first stencil in the printing stencil provided by the embodiment of the present application;

[0023] Figure 3 Top view of the mesh fabric in the printing stencil provided by the embodiment of the present application;

[0024] Figure 4 Top view of the second stencil in the printing stencil provided by the embodiment of the present application;

[0025] Figure 5 Structural schematic diagram of the printing stencil provided by the embodiment of the present application.

[0026] Among them, the main reference signs in the drawings are as follows:

[0027] 100, printing stencil;

[0028] 10, first stencil; 11, metal frame; 12, metal mesh;

[0029] 20, second stencil;

[0030] 30, mesh fabric; 31, printing part; 32, connecting part;

[0031] 40, rectangular window;

[0032] 51, transparent resin; 52, elastic buffer rubber; 53, groove. Detailed implementation manners

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0035] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined. "Several" means one or more unless otherwise specifically defined.

[0036] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0037] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" 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, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0038] 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, the phrases "in one embodiment" or "in some embodiments" appearing throughout the specification do not necessarily all refer to the same embodiment. In addition, in one or more embodiments, the specific features, structures, or characteristics may be combined in any suitable manner.

[0039] The present application provides a printing stencil capable of real-time monitoring of the mesh tension, rapid feedback, and quick replacement of the mesh according to actual needs.

[0040] Please refer to Figures 1 to 4 , an embodiment of the present application provides a printing stencil 100, including a first stencil 10, a second stencil 20, a mesh 30, and a tension sensor (not shown in the figure) arranged in a stacked manner.

[0041] The second stencil 20 is detachably connected to the first stencil 10, and accommodation cavities are provided inside the edges of the first stencil 10 and / or the second stencil 20. In this way, the second stencil 20 can be quickly disassembled and assembled with the first stencil 10, facilitating the rapid replacement of the screen mesh 30 during a burst plate. It can be understood that the first stencil 10 and the second stencil 20 can be detachably connected through connecting members such as screws or snap fasteners, and the structure is simple.

[0042] The screen mesh 30 is arranged between the first stencil 10 and the second stencil 20, that is, the first stencil 10, the screen mesh 30, and the second stencil 20 are respectively in an upper-middle-lower three-layer structure. The screen mesh 30 includes a printing portion 31 and a plurality of connecting portions 32 provided on the periphery of the printing portion 31. Printing windows for exposing the printing portion 31 are provided on the first stencil 10 and the second stencil 20. It can be understood that the printing portion 31 refers to the screen mesh pattern portion and is located at the printing window.

[0043] The tension sensor is arranged in the accommodation cavity, that is, the tension sensor is fixedly installed in the accommodation cavity. The tension sensor is connected to one of the connecting portions 32, and the remaining connecting portions 32 are connected to the first stencil 10 and / or the second stencil 20.

[0044] In this embodiment, the tension sensor is connected to one of the connecting portions 32 in the direction of the lower knife position and is used to detect the tension of the screen mesh 30. The four corners of the first stencil 10 and the second stencil 20 are respectively fixed by positioning screws.

[0045] It can be understood that when the printing stencil 100 is working properly, during the process of the squeegee pressing down the screen mesh 30, the screen mesh 30 should have a reasonable tension range. If the tension detected by the tension sensor is lower than this range value, it may be caused by a burst plate, and the first stencil 10 and the second stencil 20 need to be disassembled and the screen mesh 30 needs to be replaced; if the tension detected by the tension sensor exceeds this range value, it may be due to reasons such as excessive squeegee pressing pressure, excessive squeegee pressing distance, improper screen mesh spacing, etc., and the squeegee or the screen mesh 30 should be adjusted; if the tension detected by the tension sensor fluctuates abnormally, for example, the tension value increases without a rule or the fluctuation amplitude is large, it may be due to reasons such as squeegee wear or impurities in the slurry, and the squeegee or the slurry can be checked and replaced; meanwhile, the tension value of the screen mesh 30 at rest can be used to judge whether the printing stencil 100 can continue to be used.

[0046] The above-mentioned printing stencil 100, through the first stencil 10 and the second stencil 20 which are stacked and detachably connected, and the screen mesh 30 arranged between the first stencil 10 and the second stencil 20, facilitates the rapid replacement of the screen mesh 30 during a burst plate; in addition, through the tension sensor, the tension of the screen mesh 30 can be monitored in real time to judge whether the screen mesh 30 meets the requirements for normal printing, which can prevent slurry splashing, reduce production losses, improve production efficiency, maintain the stability of the production line, and improve the automation degree of the production line, reduce the dependence on production personnel requirements, reduce production costs, and improve economic benefits.

[0047] In this embodiment, the printing stencil 100 further includes a peripheral device electrically connected to the tension sensor. The peripheral device includes a power supply, a display screen, a signal transmission member, and a processor, and can determine whether the printing stencil 100 is working properly according to the real-time detection data of the tension sensor.

[0048] Among them, the display screen is used to display the measured value of the tension sensor, the signal transmission member is used to connect the tension sensor and the processor, and the processor is used to receive the signal transmitted by the signal transmission member and make a judgment. In addition, the peripheral device is also used to communicate with the printing device to control the operation of the printing device.

[0049] Specifically, if the tension detected by the tension sensor is lower than the reasonable tension range value, it may be caused by a burst plate. The signal is transmitted to the processor and immediately triggers the printing device to pause printing and emit an alarm sound. If the tension detected by the tension sensor exceeds this range value, the signal is transmitted to the processor and a yellow alarm signal is immediately sent for reminder. If the tension detected by the tension sensor fluctuates abnormally, for example, the tension value increases without a regular pattern or the fluctuation amplitude is large, the signal is transmitted to the processor and a yellow alarm signal is immediately sent for reminder.

[0050] In an embodiment of the present application, the printing stencil 100 further includes a plurality of elastic connecting members (not shown in the figure) disposed in the accommodating cavity, and the plurality of elastic connecting members are respectively connected to the plurality of connecting portions 32 in one-to-one correspondence. In this way, the connection manners of the plurality of connecting portions 32 to the first stencil 10 and / or the second stencil 20 are the same, and the stress conditions of the connecting portions 32 are nearly the same, which can improve the detection accuracy of the tension sensor.

[0051] Specifically, one end of the elastic connecting member is connected to the corresponding connecting portion 32, and the other end is fixedly connected to the cavity wall of the accommodating cavity. The specific connection manner is not limited herein as long as it can achieve a fixed connection.

[0052] The structure of the elastic connecting member is not unique. For example, in one embodiment, each elastic connecting member may include a plurality of elastic ropes, and the two ends of the elastic ropes are respectively connected to the connecting portion 32 and the cavity wall of the accommodating cavity. In another embodiment, the structure of the elastic connecting member may also be a one-piece elastic band, which is not limited herein.

[0053] It can be understood that during the downward pressing of the squeegee, the printing portion 31 of the screen mesh 30 deforms, and at the same time drives the connecting portion 32 to be stretched, thereby deforming the elastic connecting member.

[0054] In this embodiment, please refer to Figure 3 , the screen mesh 30 is a cross screen mesh, the printing portion 31 is rectangular, the number of the connecting portions 32 is four, and the four connecting portions 32 are respectively located on different sides of the printing portion 31.

[0055] Specifically, a tension sensor is disposed in one of the receiving cavities in the direction of the blade's downward cutting position, and an elastic connecting member with the same tension is disposed in the other receiving cavity in the direction of the blade's downward cutting position. The connecting portions 32 at the other two ends can be connected to the corresponding elastic connecting members while ensuring the balance of tension, so as to ensure the normal tension requirement for the printing of the printing screen 100, and the printing portion 31 will not undergo planar displacement during the printing process.

[0056] It can be understood that the connecting portions 32 provided on the side of the printing portion 31 in the non-blade downward cutting position direction are symmetrically distributed with respect to the printing portion 31, and the force-bearing conditions are nearly the same; in the blade downward cutting position direction, one of the connecting portions 32 connected by the tension sensor and the other opposite connecting portion 32 are also in force balance. Therefore, the force-bearing condition of the mesh yarn 30 can be accurately detected by one tension sensor, and then it can be judged whether the mesh yarn 30 meets the requirements for normal printing, without setting multiple tension sensors on the mesh yarn 30 to detect the tension of different regions of the mesh yarn 30, and the production cost is low.

[0057] Please refer to Figure 2 and Figure 4 , in an embodiment of the present application, rectangular windows 40 are respectively opened at the centers of the first screen 10 and the second screen 20. After the first screen 10 and the second screen 20 are connected, the rectangular window 40 opened on the first screen 10 and the rectangular window 40 opened on the second screen 20 are opposite to each other and form a printing window.

[0058] It can be understood that the rectangular window 40 is disposed in the center. Correspondingly, the printing portion 31 of the mesh yarn 30 is also disposed in the center, further improving the uniformity of the force on the mesh yarn 30.

[0059] It can be understood that in other embodiments of the present application, the printing window can also be set to other shapes, as long as it can completely expose the printing portion 31 of the mesh yarn 30, and no limitation is made here.

[0060] Please refer to Figure 2 and Figure 4 , in an embodiment of the present application, both the first screen 10 and the second screen 20 include a connected metal screen frame 11 and a metal mesh 12. The receiving cavity is disposed in the metal screen frame 11, and the metal mesh 12 is attached to the connecting portion 32. In this way, the tension sensor and the elastic connecting member are integrally provided with the first screen 10 or the second screen 20. The intermediate mesh yarn 30 can be replaced, and the user can complete the replacement by himself. The operation is simple, and the tension sensor, the elastic connecting member, the first screen 10 and the second screen 20 can be continuously used; in addition, the metal mesh 12 can provide a protective and supporting effect on the connecting portion 32 of the mesh yarn 30, avoiding damage caused by non-printing.

[0061] Specifically, the metal mesh frame 11 has a hollow structure, and an accommodation cavity is formed therein. The metal meshes 12 of the first screen plate 10 and the second screen plate 20 can be fitted to the connecting portion 32 of the screen yarn 30. In addition, rectangular windows 40 are provided on the metal meshes 12.

[0062] In an embodiment of the present application, the printing screen plate 100 further includes a protective member that wraps the first screen plate 10 and the second screen plate 20. The protective member is fitted to the connecting portion 32 to isolate the first screen plate 10, the second screen plate 20 from the connecting portion 32.

[0063] On the one hand, it can reduce the frictional resistance at the connection between the screen yarn 30 and the first and second screen frames; on the other hand, it can reduce the wear caused by the up and down displacement of the edge of the screen yarn 30 during printing.

[0064] In this embodiment, a protective member is wrapped on the side of the first screen plate 10 and the second screen plate 20 facing the screen yarn 30.

[0065] Specifically, please refer to Figure 5 , the protective member includes a transparent resin 51 and an elastic buffer rubber 52, and the contact surface of the protective member with the connecting portion 32 is smooth. It can be understood that in other embodiments of the present application, the protective member can also be other soft rubber products, which are not limited herein.

[0066] It can be understood that in other embodiments of the present application, a protective member can also be wrapped on the side of the first screen plate 10 and the second screen plate 20 facing away from the screen yarn 30.

[0067] Please refer to Figure 5 , in an embodiment of the present application, a groove 53 is formed on the side of the protective member facing the connecting portion 32. In this way, on the basis of isolating the first screen plate 10, the second screen plate 20 from the connecting portion 32, the contact area between the protective member and the connecting portion 32 can be reduced to reduce the frictional force, thereby reducing the influence of the frictional force on the data measured by the tension sensor and improving the accuracy of the tension sensor in monitoring the tension of the printing portion 31 of the screen yarn 30.

[0068] Specifically, a plurality of grooves 53 are formed on the side of the protective member facing the connecting portion 32 at intervals.

[0069] In this embodiment, the inner diameter of the groove 53 gradually increases along the direction facing the connecting portion 32. In this way, on the premise of ensuring a certain supporting effect of the protective member, the contact area between the protective member and the connecting portion 32 is further reduced.

[0070] The printing screen plate 100 of the present application is formed by laminating and detachably connecting a first screen plate 10 and a second screen plate 20, and a screen mesh 30 disposed between the first screen plate 10 and the second screen plate 20, which facilitates the rapid replacement of the screen mesh 30 during bursting of the plate. In addition, a tension sensor can be used to monitor the tension of the screen mesh 30 in real time to determine whether the screen mesh 30 meets the requirements for normal printing, which can prevent the splashing of the slurry, reduce production losses, improve production efficiency, maintain the stability of the production line, and improve the automation level of the production line, reduce the dependence on production personnel, lower production costs, and increase economic benefits.

[0071] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A printing screen plate, characterized in that, Including: A first stencil and a second stencil which are stacked, the second stencil is detachably connected to the first stencil, and a receiving cavity is provided inside the edge of the first stencil and / or the second stencil; A screen mesh is provided between the first stencil and the second stencil. The screen mesh includes a printing portion and a plurality of connecting portions provided on the periphery of the printing portion. Printing windows for exposing the printing portion are provided on the first stencil and the second stencil; A tension sensor is provided in the receiving cavity. The tension sensor is connected to one of the connecting portions, and the remaining connecting portions are connected to the first stencil and / or the second stencil.

2. The printing screen according to claim 1, wherein, The printing stencil further includes a plurality of elastic connecting members provided in the receiving cavity, and the plurality of elastic connecting members are connected to the plurality of connecting portions in one-to-one correspondence.

3. The printing screen plate according to claim 1, characterized in that, The screen mesh is a cross screen mesh, the printing portion is rectangular, the number of the connecting portions is four, and the four connecting portions are respectively located on different sides of the printing portion.

4. The printing screen plate according to claim 3, wherein Rectangular windows are provided at the centers of the first stencil and the second stencil. After the first stencil and the second stencil are connected, the rectangular window provided on the first stencil and the rectangular window provided on the second stencil face each other and form the printing window.

5. The printing screen plate according to claim 1, wherein Both the first stencil and the second stencil include a connected metal frame and a metal mesh. The receiving cavity is provided inside the metal frame, and the metal mesh is in contact with the connecting portion.

6. The printing screen plate according to any one of claims 1-5, characterized in that, The printing stencil further includes a protective member wrapping the first stencil and the second stencil. The protective member is in contact with the connecting portion to isolate the first stencil, the second stencil from the connecting portion.

7. The printing screen according to claim 6, wherein A groove is provided on one side of the protective member facing the connecting portion.

8. The printing screen according to claim 7, characterized in that, The inner diameter of the groove gradually increases along the direction towards the connecting portion.

9. The printing screen plate according to claim 6, wherein, The protective member includes transparent resin and elastic buffer rubber.

10. The printing screen plate according to any one of claims 1-5, characterized in that, The printing stencil further includes a peripheral device electrically connected to the tension sensor. The peripheral device includes a power supply, a display screen, a signal transmission member and a processor.

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