Screen printing plate for printing photovoltaic cell electrode

Abstract

The utility model discloses a silk screen printing plate for printing photovoltaic cell electrodes, which comprises a silk screen printing plate frame, a screen printing plate pressing sheet and a silk screen printing plate clamped between the silk screen printing plate frame and the screen printing plate pressing sheet, a plurality of through holes are arranged on a frame body of the silk screen printing plate frame, and the through holes are communicated with the screen printing plate pressing sheet. A plurality of studs matched with the through holes and nuts arranged on the studs in a covering mode are arranged on the upper surface of the screen pressing piece, one end of each stud penetrates through the screen printing plate and the through holes in the screen printing plate frame and extends to the upper surface of the screen printing plate frame, and external threads are arranged on the periphery of the outer surface of each stud. An internal thread matched with the external thread on the stud is arranged in the nut, the nut is riveted on the stud through the matching of the external thread and the internal thread, and the bottom of the nut is pressed on the frame of the screen printing plate, so that the screen printing plate pressing sheet is tightly attached to the screen printing plate, the edge of the screen printing plate can be effectively prevented from being degummed, and the service life of the screen printing plate is prolonged. And the service time of the silk-screen printing plate is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of screen printing, in particular to a screen printing plate for printing photovoltaic cell electrodes. Background Art

[0002] Solar cells are iconic products for the development and utilization of new energy, low carbon and environmental protection. Screen printing plays an important role in the production process of the positive electrode, back electrode and back electric field of solar cells, and the screen printing process has now become the mainstream process. Screen printing refers to the use of a screen as a base and a photosensitive platemaking method to make a screen printing plate with images. Screen printing consists of five major elements: screen printing plate, scraper, ink, printing table and substrate. Printing is based on the basic principle that the mesh holes of the image part of the screen printing plate can pass through the ink, while the mesh holes of the non-image part cannot pass through the ink. When printing, pour ink at one end of the screen printing plate, use a scraper to apply a certain pressure to the ink part on the screen printing plate, and move at a constant speed toward the other end of the screen printing plate. During the movement, the ink is squeezed from the mesh holes of the image part to the substrate by the scraper. The screen printing screen frame is the main structure for fixing the screen printing plate. The existing photovoltaic cell screen printing screen frame and the screen printing plate are mainly bonded by adhesive. As the use time increases, the adhesive ages, falls off or is accidentally contaminated, which will cause the edge of the screen printing plate to detach from the frame and cannot continue printing. Utility Model Content

[0003] In view of this, the utility model provides a silk screen printing plate for printing photovoltaic cell electrodes to solve the above-mentioned problems.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A screen printing plate for printing photovoltaic cell electrodes comprises a screen printing plate frame and a screen pressing plate, and a screen printing plate sandwiched between the screen printing plate frame and the screen pressing plate, wherein a plurality of through holes are opened on the frame of the screen printing plate frame, a plurality of studs matching with the through holes are arranged on the upper surface of the screen pressing plate, and a nut covering the studs, one end of the studs passes through the screen printing plate and the through holes on the screen printing plate frame and extends to the upper surface of the screen printing plate frame, an external thread is arranged around the outer surface of the studs, an internal thread matching with the external thread on the studs is arranged inside the nut, the nut is riveted to the studs through the matching of the external thread and the internal thread, and the bottom of the nut is pressed against the screen printing plate frame.

[0006] Furthermore, the silk-screen screen frame is a rectangular frame structure with a hollow middle, and the silk-screen printing plate is attached to the lower surface of the silk-screen screen frame.

[0007] Furthermore, the upper surface of the screen printing plate and the inner side edges of the screen printing plate frame are combined to form a receiving groove.

[0008] Furthermore, there are four through holes, and the four through holes are evenly distributed at four corners of the silk-screen screen frame.

[0009] Furthermore, the edge of the screen printing plate is adhered to the lower surface of the screen printing plate frame by adhesive.

[0010] Furthermore, the screen printing plate includes a gauze cloth layer, a metal wire mesh layer stretched and attached to the gauze cloth layer, and a cured resin layer covering the gauze cloth layer and the metal wire mesh layer. The gauze cloth layer is a frame-shaped structure with a hollow middle portion, and an adhesive layer is coated on the gauze cloth layer along the lower surface of the screen printing plate frame.

[0011] Furthermore, the metal wire mesh layer includes a plurality of warps arranged parallel to each other, and a plurality of wefts connected perpendicularly to the warps, and the plurality of warps and the plurality of wefts are interwoven to form useful meshes.

[0012] Furthermore, the metal wire mesh layer is a stainless steel mesh, the stainless steel mesh is 325 mesh 28 wire diameter or 325 mesh 23 wire diameter, and the cross-sections of the warp and the weft are elliptical.

[0013] Furthermore, the solidified resin layer is arranged inside the frame of the silk-screen screen, a hollow groove is opened on the solidified resin layer, and the thickness of the solidified resin layer is 10-80 μm.

[0014] Furthermore, the studs are fixedly connected to or integrally formed with the screen pressing plate, the number of the studs is consistent with the number of the through holes and they correspond one to one, the outer diameter of the studs is less than or equal to the inner diameter of the through holes, there are four studs, and the four studs are evenly distributed at the four corners of the upper surface of the screen pressing plate.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides a silk screen for printing photovoltaic cell electrodes, comprising a silk screen frame and a screen pressing plate, and a silk screen plate sandwiched between the silk screen frame and the screen pressing plate, a plurality of through holes are opened on the frame of the silk screen frame, a plurality of studs matching with the through holes are arranged on the upper surface of the screen pressing plate, and a nut is covered on the studs, one end of the stud passes through the through holes on the silk screen plate and the silk screen frame and extends to the upper surface of the printing screen frame, an external thread is arranged around the outer surface of the stud, an internal thread matching with the external thread on the stud is arranged inside the nut, the nut is riveted to the stud by matching the external thread and the internal thread, and the bottom of the nut is pressed on the silk screen frame, so that the screen pressing plate and the silk screen plate are closely fitted, which can effectively prevent the edge of the silk screen plate from degumming and extend the service life of the silk screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the silk screen printing plate used for printing photovoltaic cell electrodes of the utility model;

[0019] Figure 2 for Figure 1 An exploded view of a silk screen used to print photovoltaic cell electrodes is shown;

[0020] Figure 3 for Figure 1 A cross-sectional view of a screen printing plate used for printing photovoltaic cell electrodes is shown.

[0021] In the figure: 100, a silk screen for printing photovoltaic cell electrodes, 1, a silk screen frame, 11, a through hole, 2, a silk screen printing plate, 21, a mesh cloth layer, 22, a metal mesh layer, 221, a warp, 222, a weft, 23, a cured resin layer, 231, a hollow groove, 3, a screen pressing sheet, 31, a stud, 32, a nut. DETAILED DESCRIPTION

[0022] Now the utility model is described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the utility model in a schematic manner, so it only shows the components related to the utility model.

[0023] like Figure 1 As shown, the utility model provides a silk screen screen 100 for printing photovoltaic cell electrodes, which is used to apply electrode coating to photovoltaic cells. The silk screen screen 100 for printing photovoltaic cell electrodes of the utility model includes a silk screen screen frame 1 and a screen pressing plate 3, and a silk screen printing plate 2 sandwiched between the silk screen screen frame 1 and the screen pressing plate 3.

[0024] like Figure 1 and Figure 2 As shown, the silk screen frame 1 is a rectangular frame structure with a hollow middle, the silk screen plate 2 is attached to the lower surface of the silk screen frame 1, the upper surface of the silk screen plate 2 and the inner side of the silk screen frame 1 are combined to form a receiving groove for receiving printing ink (not shown in the figure), and the frame body of the silk screen frame 1 is provided with a through hole 11 that cooperates with the screen pressing plate 3. In this embodiment, there are four through holes 11, and the four through holes 11 are evenly distributed at the four corners of the silk screen frame 1.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, the edge of the screen printing plate 2 is adhered to the lower surface of the screen printing frame 1 by adhesive, the screen printing plate 2 includes a gauze cloth layer 21 attached to the screen printing frame 1, a metal wire mesh layer 22 stretched and attached to the gauze cloth layer 21, and a cured resin layer 23 covering the gauze cloth layer 21 and the metal wire mesh layer 22, the gauze cloth layer 21 is a frame structure with a hollow middle, an adhesive layer is coated on the gauze cloth layer 21 along the lower surface of the screen printing frame 1, and the metal wire mesh layer 22 includes a plurality of warp threads 221 arranged parallel to each other, and a curing resin layer 23 covering the warp threads 22. The plurality of wefts 222 are vertically connected to each other, and the plurality of warps 221 and the plurality of wefts 222 are interwoven to form mesh holes (not shown) for passing printing ink. In this embodiment, the metal wire mesh layer 22 is a stainless steel mesh, and the stainless steel mesh is 325 meshes and 28 wire diameters or 325 meshes and 23 wire diameters. The cross-sections of the warps 221 and the wefts 222 are elliptical. The solidified resin layer 23 is arranged inside the screen frame 1, and a hollow groove 231 for passing ink is opened on the solidified resin layer 23. In this embodiment, the thickness of the solidified resin layer 23 is 10 to 80 μm.

[0026] like Figure 1 and Figure 3As shown, the screen pressing plate 3 is attached to the lower surface of the screen printing plate 2, and the upper surface of the screen pressing plate 3 is provided with a plurality of studs 31 that match the through holes 11 on the screen printing screen frame 1. The studs 31 are fixedly connected or integrally formed with the screen pressing plate 3. The number of studs 31 and the through holes 11 are consistent and one-to-one corresponding. The outer diameter of the studs 31 is less than or equal to the inner diameter of the through holes 11. In this embodiment, there are four studs 31, and the four studs 31 are evenly distributed at the four corners of the upper surface of the screen pressing plate 3; one end of the stud 31 passes through the through holes 11 on the screen printing plate 2 and the screen printing screen frame 1 and extends to the screen printing plate The upper surface of the frame 1; the screen pressing plate 3 also includes a nut 32 for fixing the screen pressing plate 3, the number of the nut 32 and the stud 31 are the same and correspond one to one, the outer surface of the stud 31 is provided with external threads around, and the interior of the nut 32 is provided with an internal thread matching the external thread on the stud 31, the nut 32 is riveted to the stud 31 through the cooperation of the external thread and the internal thread, and the bottom of the nut 32 is pressed on the screen printing screen frame 1, so that the screen pressing plate 3 and the screen printing plate 2 are tightly fitted; in this embodiment, the screen pressing plate 3 is made of stainless steel, and the thickness of the screen pressing plate 3 is 4 to 10 mm.

[0027] The utility model provides a screen printing screen 100 for printing photovoltaic cell electrodes, comprising a screen printing screen frame 1 and a screen pressing plate 3, and a screen printing plate 2 sandwiched between the screen printing screen frame 1 and the screen pressing plate 3, wherein a plurality of through holes 11 are provided on the frame of the screen printing screen frame 1, a plurality of studs 31 matching with the through holes 11 and a nut 32 covering the studs 31 are provided on the upper surface of the screen pressing plate 3, and one end of the stud 31 passes through the screen printing plate 2 and the screen printing screen frame. The through hole 11 on 1 extends to the upper surface of the screen frame 1, the outer surface of the stud 31 is provided with external threads around, and the interior of the nut 32 is provided with internal threads matching the external threads on the stud 31, the nut 32 is riveted to the stud 31 through the matching of the external threads and the internal threads, and the bottom of the nut 32 is pressed on the screen frame 1, so that the screen pressing sheet 3 and the screen printing plate 2 are closely fitted, which can effectively prevent the edge of the screen printing plate 2 from degumming and extend the service life of the screen printing plate.

[0028] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the scope of the utility model through the above description. The technical scope of this utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A screen printing plate for printing photovoltaic cell electrodes, characterized in that: It includes a silk screen frame and a screen pressing plate, and a silk screen plate sandwiched between the silk screen frame and the screen pressing plate, the frame of the silk screen frame is provided with a plurality of through holes, the upper surface of the screen pressing plate is provided with a plurality of studs matching with the through holes, and a nut covering the studs, one end of the stud passes through the silk screen plate and the through holes on the silk screen frame and extends to the upper surface of the silk screen frame, the outer surface of the stud is provided with external threads around, the interior of the nut is provided with internal threads matching with the external threads on the stud, the nut is riveted to the stud through the matching of the external threads and the internal threads, and the bottom of the nut is pressed on the silk screen frame.

2. The screen printing plate for printing photovoltaic cell electrodes according to claim 1, characterized in that: The screen printing frame is a rectangular frame structure with a hollow middle, and the screen printing plate is attached to the lower surface of the screen printing frame.

3. The screen printing plate for printing photovoltaic cell electrodes according to claim 1, characterized in that: The upper surface of the screen printing plate and the inner side edge of the screen printing plate frame are combined to form a receiving groove.

4. The screen printing plate for printing photovoltaic cell electrodes according to claim 1, characterized in that: There are four through holes, and the four through holes are evenly distributed at the four corners of the silk-screen screen frame.

5. The screen printing plate for printing photovoltaic cell electrodes according to claim 1, characterized in that: The edge of the screen printing plate is adhered to the lower surface of the screen printing plate frame by adhesive.

6. The screen printing plate for printing photovoltaic cell electrodes according to claim 1, characterized in that: The screen printing plate includes a gauze cloth layer, a metal wire mesh layer stretched and attached to the gauze cloth layer, and a cured resin layer covering the gauze cloth layer and the metal wire mesh layer. The gauze cloth layer is a frame-shaped structure with a hollow middle portion, and an adhesive layer is coated on the gauze cloth layer along the lower surface of the screen printing plate frame.

7. The screen printing plate for printing photovoltaic cell electrodes according to claim 6, characterized in that: The metal wire mesh layer includes a plurality of warps arranged parallel to each other, and a plurality of wefts connected perpendicularly to the warps, and the plurality of warps and the plurality of wefts are interwoven to form useful meshes.

8. The screen printing plate for printing photovoltaic cell electrodes according to claim 7, characterized in that: The metal wire mesh layer is a stainless steel mesh, the stainless steel mesh is 325 mesh 28 wire diameter or 325 mesh 23 wire diameter, and the cross-sections of the warp and the weft are elliptical.

9. The screen printing plate for printing photovoltaic cell electrodes according to claim 6, characterized in that: The solidified resin layer is arranged inside the frame of the silk screen printing screen, and a hollow groove is opened on the solidified resin layer.

10. The screen printing plate for printing photovoltaic cell electrodes according to claim 1, characterized in that: The studs are fixedly connected to or integrally formed with the screen pressing plate, the number of the studs is consistent with the number of the through holes and they correspond one to one, the outer diameter of the studs is less than or equal to the inner diameter of the through holes, there are four studs, and the four studs are evenly distributed at the four corners of the upper surface of the screen pressing plate.

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