CN209971826U

CN209971826U - Rubber-coated screen plate

Info

Publication number: CN209971826U
Application number: CN201822250494.5U
Authority: CN
Inventors: 高培; 孙明亮; 路忠林; 吴仕梁; 盛雯婷; 张凤鸣
Original assignee: Xuzhou Dayto Photovoltaic Technology Co Ltd; Jiangsu Sunport Power Corp Ltd
Current assignee: Xuzhou Dayto Photovoltaic Technology Co Ltd; Jiangsu Sunport Power Corp Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2020-01-21
Anticipated expiration: 2028-12-29

Abstract

The utility model discloses a glue brushing screen plate, which comprises a rectangular metal frame, a stretching net protection area and a metal mesh sheet; the metal frame is adaptive to the MWT photovoltaic module in shape, a metal mesh is arranged in the middle of the metal frame, and the metal mesh is connected to the metal frame through a stretching net protection area; the metal mesh is provided with holes, and the holes are designed at the positions of back electrode points of the MWT photovoltaic module according to use requirements. Through using the utility model discloses the method can promote the product yield, and reduce cost improves staff's operating efficiency, creates economic value for the enterprise.

Description

Rubber-coated screen plate

Technical Field

The utility model relates to a brush of conducting resin glues half tone especially relates to a brush of MWT photovoltaic module conducting resin glues half tone, belongs to MWT solar module processing technology field.

Background

The MWT photovoltaic module is a photovoltaic module based on a brand-new metal foil circuit design, and battery pieces are interconnected through conductive glue and a conductive core board to form a complete conductive loop. The MWT back contact battery technology is characterized in that a front main grid introduces a front electrode of a battery piece into the back of the battery piece in a laser drilling mode, current on the front is converged to the back by combining pouring silver paste, positive and negative electrodes on the back are distributed in a dotted mode, and positive and negative electrode points on the back are connected with a conductive core board through conductive adhesive, so that a conductive loop is formed. Because the aperture of the electrode point on the back surface of the MWT battery piece is less than 200 micrometers, and the conductive adhesive is an adhesive with both conductivity and adhesive property, if the conductive adhesive is poorly printed, the electrode point of the battery piece is not in correspondence with the adhesive point, so that poor contact is caused, and the product is degraded. Therefore, a new conductive offset printing method needs to be found.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem of printing quality of the MWT photovoltaic module conductive adhesive, the printing method suitable for the MWT photovoltaic module is provided. By using the method, the product yield can be improved, the cost is reduced, the working efficiency of the staff is improved, and the economic value is created for enterprises.

In order to realize the purpose of the utility model, the utility model provides a glue brushing screen, which comprises a rectangular metal frame, a net stretching protection area and a metal net sheet; the metal frame is adaptive to the MWT photovoltaic module in shape, a metal mesh is arranged in the middle of the metal frame, and the metal mesh is connected to the metal frame through a stretching net protection area; the metal mesh is provided with holes, and the holes are designed at the positions of back electrode points of the MWT photovoltaic module according to use requirements.

Furthermore, the cross section of the hole of the metal mesh is trapezoidal, the upper part is small, the lower part is large, and the aperture of the large side is 1.35+ -0.05 mm.

Furthermore, the net stretching protection area adopts stainless steel wires for net stretching, and protective glue is coated at the joints between the net stretching and the metal mesh sheets and between the net stretching and the metal frame.

Preferably, the metal frame is made of an aluminum alloy material, and the metal mesh is a steel mesh.

The utility model also provides a printing method of MWT photovoltaic module conducting resin, printing method includes following step:

opening a screen clamp, stably placing a glue brushing screen into a fixing frame and pushing the glue brushing screen to a limit stop block; locking the glue brushing screen printing plate; according to the image display, the dial plate is rotated to adjust the position of the glue brushing screen plate so that the hole is aligned with the position of the electrode point on the copper foil;

stirring the unfrozen conductive adhesive uniformly by using a scraper, shoveling the conductive adhesive from the adhesive barrel, uniformly coating the conductive adhesive on a printing area of a glue brushing screen printing plate, namely the head of the metal mesh, and requiring that the coating length of the conductive adhesive is not less than the width of the printing area of the glue brushing screen printing plate;

step three, printing the conductive printing on the copper foil by a pressure applying method by means of a bar scraping scraper; coating conductive adhesive at two ends of the glue brushing screen plate during printing, applying pressure on the conductive adhesive part on the glue brushing screen plate by using a scraper, moving towards the other end of the glue brushing screen plate at a constant speed, and printing back and forth, wherein the conductive adhesive is extruded onto the copper foil by the scraper from holes of the printing surface part during moving.

Compared with the prior art, the utility model has the advantages that:

1. high printing precision, small error, good printing quality and the like.

2. The screen printing plate has high rigidity and low elasticity, can be repeatedly used and reduces the cost waste.

3. The printing aperture and the hole spacing are uniform and accurate, the printing efficiency is high, and the improvement of the working efficiency of workers is facilitated.

Drawings

FIG. 1 is a schematic plan view of a screen printing plate for brushing glue;

FIG. 2 is a cross-sectional view of an opening of a steel mesh;

FIG. 3 is a schematic diagram of a conductive paste printing process;

in the figure, 1-steel mesh printing area, 2-stretching net protection area and 3-aluminum alloy frame.

Detailed Description

The technical content adopted in the present invention is further explained below with reference to the accompanying drawings:

example 1

The utility model provides a glue brushing screen plate, which comprises a rectangular metal frame, a stretching net protection area 2 and a metal mesh sheet; the metal frame is adaptive to the MWT photovoltaic module in shape, a metal mesh is arranged in the middle of the metal frame, and the metal mesh is connected to the metal frame through a stretching net protection area; the metal mesh is provided with holes, and the holes are designed at the positions of back electrode points of the MWT photovoltaic module according to use requirements. In this embodiment, the metal frame is made of an aluminum alloy material, and the metal mesh is a steel mesh.

Fig. 1 is a plan view of a screen printing plate, the periphery of the screen printing plate in fig. 1 is wrapped by an aluminum alloy frame 3, impact extrusion deformation and pressurization firmness are placed, and a screen stretching protection area 2 is a screen stretching area adopting stainless steel wires.

FIG. 2 is a cross-sectional view of a steel mesh opening, wherein the thickness of the steel mesh is 0.3mm, and the conductive paste is required to be coated on the printing surface and printed on the scraping surface by pressure in order to ensure that the printed conductive paste is in the shape of a trapezoidal cylinder, the aperture of the screen is 1.3mm, and one side of the scraping surface is a copper foil surface.

Furthermore, the net stretching protection area adopts stainless steel wires for net stretching, and protective glue is coated at the joints between the net stretching and the metal mesh sheets and between the net stretching and the metal frame. The 3 viscose departments of the stretching net, the steel mesh sheet and the aluminum alloy frame are not easy to degum, the firmness and the tension of the screen printing plate in the printing process can be effectively guaranteed by the coated protective glue, the middle part is an effective printing area of the conductive glue, the conductive glue is coated in the printing area, and the conductive glue is printed on the copper foil through small aperture by applying certain pressure through the extrusion of the scraping strip.

The glue brushing screen plate is a steel mesh which is electrically polished, and the smoothness of the inner wall is enhanced through fine polishing, so that degumming is facilitated; the coating protection glue on the stretching net ensures enough firmness and tension and can meet the standard printing quality requirement. The printing screen plate provided by the utility model has the characteristics of high printing precision, small error, good printing quality and the like; and the screen printing plate has large rigidity and small elasticity, can be repeatedly used and reduces the cost waste.

Example 2

opening a screen clamp, stably placing a glue brushing screen into a fixing frame and pushing the glue brushing screen to a limit stop block; locking the glue brushing screen printing plate; according to image display, rotating the dial plate to finely adjust the position of the screen printing plate so that the reference hole is aligned with a cross mark on the software and the hole is aligned with the position of an electrode point on the copper foil; putting down the scraper;

Fig. 3 is a schematic diagram of a conductive adhesive printing process, wherein a is conductive adhesive, B is a scraper, C is an effective printing area mesh, D is a screen, E is a carrier plate, F is a dial, G is a limit stop, and H is a screen clamp.

The printing principle is as follows: using a screen as a substrate, a conductive paste was printed on a copper foil by applying pressure by means of a bar-scraper. When printing, coating conductive adhesive on two ends of the screen plate, applying a certain pressure on the conductive adhesive part on the screen plate by using a scraper, moving towards the other end of the screen plate at a constant speed, printing back and forth, extruding the conductive adhesive onto the copper foil from meshes of a printing surface part by a scraping strip in the moving process, and enabling the adhesive point to correspond to the electrode point.

The utility model provides a MWT photovoltaic module conducting resin printing method can realize battery piece back positive and negative electrode point and brush glue through this kind of printing method and glue the point and form good contact to form conductive loop.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications can be made without departing from the principle of the present invention, and these modifications should also be regarded as the protection scope of the present invention.

Claims

1. A glue brushing screen is characterized by comprising a rectangular metal frame, a stretched net protection area and a metal mesh; the metal frame is adaptive to the MWT photovoltaic module in shape, a metal mesh is arranged in the middle of the metal frame, and the metal mesh is connected to the metal frame through a stretching net protection area; the metal mesh is provided with holes, and the holes are designed at the positions of back electrode points of the MWT photovoltaic module according to use requirements.

2. The screen printing plate of claim 1, wherein the cross section of the holes of the metal mesh is trapezoidal, the upper part is small, the lower part is large, and the diameter of the large side is 1.35+ -0.05 mm.

3. The glue-brushing screen printing plate as claimed in claim 2, wherein the screen stretching protection area is a stainless steel wire screen stretching area, and the joints between the screen stretching area and the metal mesh sheet and between the screen stretching area and the metal frame are coated with protection glue.

4. The screen printing plate of any one of claims 1 to 3, wherein the metal frame is made of an aluminum alloy material, and the metal mesh is a steel mesh.