A printing screen for photovoltaic glass

Abstract

This utility model discloses a printing screen for photovoltaic glass, comprising a frame and a screen fabric. The screen fabric has a printed pattern located within the inner contour area of ​​the frame. Buffer components are provided at both ends of the back side of the frame along its length. A first protective layer is provided at both ends of the back side of the frame along its width. A second protective layer is provided at both ends of the front side of the frame along its width. The length of the second protective layer is equal to the length of the frame. The two ends of the first protective layer contact one side of the nearest buffer component. This printing screen protects the photosensitive emulsion on the screen and also provides cushioning during glass printing, effectively increasing the screen's wear resistance, reducing damage, and extending its service life, thereby lowering glass production and processing costs.

Description

Technical Field

[0001] This utility model relates to the field of glass production equipment technology, specifically to a printing screen for photovoltaic glass. Background Technology

[0002] In existing technologies, when printing on photovoltaic backsheet glass using a printing screen, as the squeegee returns to its starting position, another back-inking blade descends. Its function is to scrape the remaining enamel back to its original position after the squeegee has advanced, preparing for the next printing, and simultaneously spreading the enamel evenly on the screen. During this process, both the squeegee and the back-inking blade apply repeated pressure to the screen, which can cause the photosensitive emulsion to peel off or break, and the mesh to tear. These issues lead to product defects and screen scrapping, resulting in frequent screen replacements during production and increasing glass manufacturing costs.

[0003] It can effectively increase the wear resistance of glass printing screens and increase the number of glass printing sheets, thus solving the problems of photosensitive emulsion peeling off, mesh damage, and screen breakage that occur during glass printing in existing technologies. Utility Model Content

[0004] In view of this, in order to solve the problems of the prior art, this utility model provides a printing screen for photovoltaic glass, which can play a buffering role in the glass printing process, effectively increase the wear resistance of the printing screen, and reduce damage to the screen.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A printing screen for photovoltaic glass includes a frame and a screen fabric. The screen fabric has a printed pattern located within the inner contour area of ​​the frame. Buffer components are provided at both ends of the frame along its length (the two short sides) on the side of the frame closest to the photovoltaic glass (back side). A first protective layer is provided at both ends of the frame along its width (the two long sides) on the side of the frame closest to the photovoltaic glass. A second protective layer is provided at both ends of the frame along its width on the side of the frame furthest from the photovoltaic glass (front side). The length of the second protective layer is equal to the length of the frame. The two ends of the first protective layer are in contact with one of the buffer components closest to it.

[0006] According to a preferred embodiment of the present invention, the length direction of the buffer component is parallel to the width direction of the mesh frame, and the length directions of the first protective layer and the second protective layer are both parallel to the length direction of the mesh frame.

[0007] According to a preferred embodiment of the present invention, the buffer assembly comprises, from bottom to top, a first adhesive layer, a second adhesive layer, and a pad. The first adhesive layer is bonded to the side of the screen frame closest to the photovoltaic glass, and a first gap exists between the side of the first adhesive layer closest to the printed pattern and the inner edge of the adjacent screen frame. The first adhesive layer increases the adhesion and firmness between the screen frame and the second adhesive layer, ensuring effective bonding between the second adhesive layer and the screen frame. Furthermore, the second adhesive layer protects the printing screen, effectively reducing wear on the screen by the squeegee and preventing the photosensitive emulsion from detaching due to friction from the squeegee.

[0008] According to a preferred embodiment of the present invention, the second adhesive layer includes a first part and a second part that are parallel to each other, with the bottom surface of a portion of the first part adhering to the top surface of the first adhesive layer; the first part is close to the printed pattern, and the side of the first part away from the printed pattern is in contact with and flush with one side of the second part, and there is a second gap between the side of the first part close to the printed pattern and the inner edge of the frame it is close to.

[0009] According to a preferred embodiment of the present invention, the width of the first part is smaller than the width of the second part, and the bottom surface of the second part is attached to the side of the frame closest to the photovoltaic glass. The first spacing is greater than the second spacing, and the length of the first part is equal to the length of the second part and the first adhesive layer. Setting the first spacing to be greater than the second spacing allows the inner edge of the first part to be offset from the inner edge of the first adhesive layer, avoiding increasing the overlap thickness of the first adhesive layer and the first part, and preventing color difference in the edge glaze stripe caused by excessive thickness of the overlapping edge during the printing process.

[0010] According to a preferred embodiment of the present invention, the orthographic projection of the pad on the mesh frame covers the orthographic projections of the first adhesive layer and the second adhesive layer on the mesh frame, wherein the length of the first adhesive layer is equal to or greater than the width of the inner contour of the mesh frame.

[0011] According to a preferred embodiment of this utility model, the thickness of both the first adhesive layer and the second adhesive layer is 0.1-0.15 mm, the thickness of the first part is equal to the thickness of the second part, and the thickness of the pad is equal to the thickness of the photovoltaic glass and greater than the thickness of the first adhesive layer and the second adhesive layer. The pad's thickness is consistent with the glass thickness, ensuring a buffering effect during printing, reducing the pressure of the squeegee on the screen, and thus effectively protecting the screen. In some embodiments of this utility model, the pad is bonded to the second adhesive layer with glue or tape.

[0012] According to a preferred embodiment of the present invention, the width of the first adhesive layer is 19-25mm, the width of the first part is 20-30mm, the width of the second part is 100-110mm, and the width of the pad is 200-210mm.

[0013] According to a preferred embodiment of this utility model, the first protective layer has a third gap between the side of the printed pattern and the inner edge of the adjacent screen frame, the third gap being equal to the width of the blank space at the edge of the photovoltaic glass; the distance between the side of the second protective layer near the printed pattern and the inner edge of the adjacent screen frame is 2-3 mm. In some embodiments of this utility model, the first protective layer ensures that the screen is pressed on top of the first protective layer during the printing process, preventing the glass edge from being suspended and avoiding friction between the glass edge and the screen, which could lead to screen cracking, thus effectively protecting the screen. The second protective layer is equivalent to forming a protective layer between the contact surface of the printing screen and the squeegee, which can also effectively reduce the wear of the photosensitive emulsion on the screen and extend the service life of the screen.

[0014] According to a preferred embodiment of the present invention, the end of the first protective layer contacts the side of the pad of a nearby buffer assembly, the top surface of the first protective layer is flush with the top surface of the pad, and the distance between the two first protective layers is less than the length of the pad.

[0015] Compared with the prior art, the advantages of this utility model are as follows: The printing screen for photovoltaic glass of this utility model can protect the photosensitive emulsion on the screen by setting buffer components on the two short sides of the screen frame near the glass (back side), setting a first protective layer on the two long sides, and setting a second protective layer on the two long sides of the screen frame away from the glass (front side). In addition, it can also play a buffering role during the glass printing process, effectively increasing the wear resistance of the printing screen, reducing damage to the screen, and helping to extend the service life of the screen, thereby reducing the production and processing costs of glass. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the printing screen in a preferred embodiment of the present invention, viewed from a first perspective. Figure 2 This is a three-dimensional structural diagram of the printing screen from a second perspective in a preferred embodiment of the present invention; Figure 3 This is a top view of the buffer assembly in a preferred embodiment of the present invention; The attached figures are labeled as follows: Frame-1, mesh fabric-2, printed pattern-3, cushioning assembly-4, first adhesive layer-41, first part-421, second part-422, pad-43, first protective layer-5, second protective layer-6. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0019] Reference Figures 1 to 3 This embodiment of a printing screen for photovoltaic glass includes a frame 1, a screen fabric 2, and a buffer assembly 4, a first protective layer 5, and a second protective layer 6 disposed on the frame 1. The screen fabric 2 is taut and fixed to the frame 1, and has a printed pattern 3 located within the inner contour area of ​​the frame 1. The frame 1 has a front and a back; the side of the frame 1 closest to the photovoltaic glass is the back, and the side of the frame 1 furthest from the photovoltaic glass is the front.

[0020] Furthermore, such as Figure 1 and Figure 2 As shown, buffer components 4 are provided at both ends of the back of the wire mesh frame 1 along its length direction (the two short sides of the back of the wire mesh frame 1), and a first protective layer 5 is provided at both ends of the back of the wire mesh frame 1 along its width direction (the two long sides of the back of the wire mesh frame 1); a second protective layer 6 is provided at both ends of the front of the wire mesh frame 1 along its width direction (the two long sides of the front of the wire mesh frame 1). The length direction of the buffer components 4 is parallel to the width direction of the wire mesh frame 1, and the length directions of the first protective layer 5 and the second protective layer 6 are both parallel to the length direction of the wire mesh frame 1.

[0021] Furthermore, the buffer assembly 4 includes, from bottom to top, a first adhesive layer 41, a second adhesive layer, and a pad 43. The bottom surface of the first adhesive layer 41 is attached to the back of the mesh frame 1, and the bottom surface of the second adhesive layer is attached to the top surface of the first adhesive layer 41. In this embodiment, the pad 43 is attached to the top surface of the second adhesive layer by double-sided adhesive.

[0022] like Figure 3As shown, the first adhesive layer 41 has a first gap between the side of the printed pattern 3 and the inner edge of the adjacent screen frame 1. The width of the second adhesive layer is greater than the width of the first adhesive layer 41. The second adhesive layer includes a first part 421 and a second part 422 that are parallel to each other. The width of the first part 421 is smaller than the width of the second part 422. The first part 421 is close to the printed pattern 3, and part of the bottom surface of the first part 421 is in contact with the top surface of the first adhesive layer 41. The bottom surface of the second part 422 is directly in contact with the back of the screen frame 1. The side of the first part 421 away from the printed pattern 3 is in contact with and flush with the side of the second part 422. The side of the first part 421 close to the printed pattern 3 has a second gap between the side of the first part 421 close to the inner edge of the adjacent screen frame 1. The first gap is greater than the second gap, which allows the inner edge of the first part 421 to be staggered from the inner edge of the first adhesive layer 41, avoiding increasing the overlap thickness of the first adhesive layer 41 and the first part 421, and preventing color difference in the edge glaze due to excessive overlap during the printing process.

[0023] In this embodiment, the first spacing is preferably 2mm. If the first spacing is greater than 2mm, it will not provide protection and will lead to problems such as overflow and uneven glaze stripes during screen printing. If the first spacing is less than 2mm, problems such as blackening of the glaze stripes will occur. The second spacing is preferably 1mm.

[0024] The orthographic projection of the pad 43 on the frame 1 covers the orthographic projections of the first adhesive layer 41 and the second adhesive layer on the frame 1. Specifically, the length of the first adhesive layer 41 is equal to or greater than the width of the inner contour of the frame 1, the length of the first part 421 is equal to the length of the second part 422 and the first adhesive layer 41, and the length of the pad 43 is greater than the lengths of the first adhesive layer 41 and the second adhesive layer. In this embodiment, it is preferable that the length of the first adhesive layer 41 is greater than the width of the inner contour of the frame 1. The thickness of both the first adhesive layer 41 and the second adhesive layer is 0.1-0.15 mm, and the thickness of the first part 421 is equal to the thickness of the second part 422. The thickness of the pad 43 is equal to the thickness of the photovoltaic glass and greater than the thickness of the first adhesive layer 41 and the second adhesive layer. In this embodiment, the thickness of the first adhesive layer 41 is 0.1 mm, the thickness of the second adhesive layer is 0.13 mm, and the thickness of the pad 43 is 2 mm. The width of the first adhesive layer 41 is 19-25mm, the width of the first part 421 is 20-30mm, the width of the second part 422 is 100-110mm, and the width of the pad 43 is 200-210mm. In this embodiment, it is preferable that the width of the first adhesive layer 41 is 19mm, the width of the first part 421 is 25mm, the width of the second part 422 is 100mm, and the width of the pad 43 is 200mm.

[0025] In this embodiment, the first adhesive layer 41 is made of transparent tape, and the second adhesive layer is made of high-temperature resistant insulating tape.

[0026] Furthermore, the first protective layer 5 has a third gap between the side near the printed pattern 3 and the inner edge of the adjacent screen frame 1. This third gap is equal to the width of the blank space at the edge of the photovoltaic glass, and needs to be adjusted according to the customer's order requirements for the width of the blank space at the glass edge. Additionally, the end of the first protective layer 5 contacts the side edge of the pad 43 of a nearby buffer component 4. The width of the first protective layer 5 is 20-30mm, preferably 20mm. The top surface of the first protective layer 5 is flush with the top surface of the pad 43, and the distance between the two first protective layers 5 is less than the length of the pad 43. The arrangement of the first protective layer 5 ensures that the screen is pressed onto the first protective layer 5 during the printing process, preventing the glass edge from being suspended and avoiding friction between the glass edge and the screen, which could cause the screen to crack, thus effectively protecting the screen. In this embodiment, the material of the first protective layer 5 is preferably foam strip.

[0027] The second protective layer 6 is located on the front side of the screen frame 1. The length of the second protective layer 6 is equal to the length of the screen frame 1, and the distance between the side of the second protective layer 6 closest to the printed pattern 3 and the inner edge of the screen frame 1 is 2-3 mm. The material of the second protective layer 6 is preferably high-temperature resistant aluminum foil tape, with a width of 40-50 mm, preferably 40 mm; the thickness of the second protective layer 6 is 0.06 mm. The second protective layer 6 forms a protective layer between the printing screen and the squeegee contact surface, which can effectively reduce the wear of the photosensitive emulsion on the screen and extend the service life of the screen.

[0028] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A printing screen for photovoltaic glass, comprising a frame and a fabric, wherein the fabric has a printed pattern located within an area of ​​the inner contour of the frame, characterized in that, The mesh frame has buffer components at both ends along its length on the side closest to the photovoltaic glass, a first protective layer at both ends along its width on the side closest to the photovoltaic glass, and a second protective layer at both ends along its width on the side furthest from the photovoltaic glass. The length of the second protective layer is equal to the length of the mesh frame, and the two ends of the first protective layer are in contact with one of the buffer components closest to it.

2. The printing screen for photovoltaic glass according to claim 1, characterized in that, The length direction of the buffer component is parallel to the width direction of the frame, and the length directions of the first protective layer and the second protective layer are both parallel to the length direction of the frame.

3. The printing screen for photovoltaic glass according to claim 2, characterized in that, The buffer assembly comprises, from bottom to top, a first adhesive layer, a second adhesive layer, and a pad. The first adhesive layer is bonded to the side of the frame closest to the photovoltaic glass, and there is a first gap between the side of the first adhesive layer closest to the printed pattern and the inner edge of the frame it is close to.

4. The printing screen for photovoltaic glass according to claim 3, characterized in that, The second adhesive layer includes a first part and a second part that are parallel to each other. The bottom surface of a portion of the first part is attached to the top surface of the first adhesive layer. The first part is close to the printed pattern. The side of the first part away from the printed pattern is in contact with and flush with one side of the second part. There is a second gap between the side of the first part close to the printed pattern and the inner edge of the frame it is close to.

5. The printing screen for photovoltaic glass according to claim 4, characterized in that, The width of the first part is smaller than the width of the second part, and the bottom surface of the second part is attached to the side of the frame closest to the photovoltaic glass. The first spacing is greater than the second spacing, and the length of the first part is equal to the length of the second part and the first adhesive layer.

6. The printing screen for photovoltaic glass according to claim 4, characterized in that, The orthographic projection of the pad on the mesh frame covers the orthographic projections of the first adhesive layer and the second adhesive layer on the mesh frame, and the length of the first adhesive layer is equal to or greater than the width of the inner contour of the mesh frame.

7. The printing screen for photovoltaic glass according to claim 6, characterized in that, The thickness of the first adhesive layer and the second adhesive layer is 0.1-0.15 mm. The thickness of the first part is equal to the thickness of the second part. The thickness of the pad is equal to the thickness of the photovoltaic glass and greater than the thickness of the first adhesive layer and the second adhesive layer.

8. The printing screen for photovoltaic glass according to claim 7, characterized in that, The width of the first adhesive layer is 19-25mm, the width of the first part is 20-30mm, the width of the second part is 100-110mm, and the width of the pad is 200-210mm.

9. The printing screen for photovoltaic glass according to claim 3, characterized in that, The first protective layer has a third gap between the side of the printed pattern and the inner edge of the adjacent frame, the third gap being equal to the width of the blank space at the edge of the photovoltaic glass; the second protective layer has a distance of 2-3 mm between the side of the printed pattern and the inner edge of the adjacent frame.

10. The printing screen for photovoltaic glass according to claim 9, characterized in that, The end of the first protective layer contacts the side of the pad of a nearby buffer assembly, the top surface of the first protective layer is flush with the top surface of the pad, and the distance between the two first protective layers is less than the length of the pad.

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