CN210680046U

CN210680046U - Scraping strip for screen printing

Info

Publication number: CN210680046U
Application number: CN201921187785.2U
Authority: CN
Inventors: 姚玉; 李良; 王俊
Original assignee: Zhenjiang Dq Solar Co ltd
Current assignee: Zhenjiang Dq Solar Co ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-06-05
Anticipated expiration: 2029-07-26

Abstract

The utility model discloses a scrape strip for screen printing belongs to solar cell screen printing equipment technical field. A scraping strip for screen printing comprises a scraping strip body and a scraping strip support, wherein the joint of the long edge and the bottom of the scraping strip body is an arc-shaped chamfer; and a fixed rotation angle is arranged between the extension direction of the scraping strip body along the long edge and the extension direction of the scraping strip support along the long edge, and the fixed rotation angle is 0-15 degrees. The utility model discloses a scrape the strip and can reduce thick liquids printing resistance, solve the problem of crossing china ink, printing badly easily, can realize scraping the effective management and control of the wet heavy of strip life cycle interior printing, improve battery piece printing quality simultaneously.

Description

Scraping strip for screen printing

Technical Field

The utility model relates to a solar cell screen printing equipment technical field, concretely relates to scrape strip for screen printing.

Background

The silk-screen printing is an important link for manufacturing the crystalline silicon solar cell, and the silk-screen printing is mainly used for manufacturing a positive electrode and a negative electrode. Electrodes and grid lines on the battery piece are formed by a screen printing technology, the conventional screen printing plate has the problem of poor uniformity of a printing line type, and the bottle neck is reached when higher and narrower line types under high efficiency are pursued, so the screen printing technology without screen knots is generated. The net knot-free screen printing plate can avoid net knots to a certain extent, optimizes the line type, further narrows the line width, and further reduces the shading area. In order to improve the efficiency of the battery piece, the non-mesh screen printing plate is comprehensively popularized and used in recent years.

The screen printing of the solar cell is to print the slurry on a carrier through a template with patterns under the extrusion of a scraping strip. In the actual printing process, there are three problems when current scraping strip and no net knot half tone collocation use: firstly, after a new scraping bar in the prior art shown in fig. 3 is used online, the printing end of the scraping bar is in a right angle, the pressure of the printing end of the scraping bar and a press plate of a screen printing plate is higher, the printing wet weight is generally lower, the loss of the screen printing plate is increased, the assembly reliability risk exists, the printing end of the scraping bar is abraded into a certain radian along with the increase of the printing times, and the printing wet weight tends to be stable; secondly, with the further narrowing of the line width of the non-mesh screen printing plate, slurry accumulation is easy to occur when the existing scraping strips are printed to the screen position of the non-mesh screen printing plate, so that the problems of grid breaking, virtual printing and the like are caused, and the appearance and the electrical property of the battery piece are seriously influenced; thirdly, as shown in fig. 5, the scraper body of the existing scraper is parallel to the scraper support, the printing direction is perpendicular to the line diameter direction of the screen without mesh knots in the printing process, the printing resistance of the slurry is large, and the printing problems such as grid breakage, virtual printing and the like are easily caused; after the scraping bar support is rotated for a certain angle, the printing resistance of the slurry is reduced, ink is easy to pass, and the problem of poor printing can be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem and providing a scraping strip for silk-screen printing.

The utility model provides a scrape strip for screen printing, includes and scrapes strip body and scrape strip support, the long limit of scraping the strip body is the arc with the junction of bottom.

Preferably, the included angle between the extending direction of the long edge of the scraper bar body and the extending direction of the long edge of the scraper bar bracket is 0-15 degrees.

Preferably, the chamfer angle of the arc is no greater than 90 degrees.

Preferably, the scraper bar bracket is provided with a positioning mounting hole.

Preferably, the lower end of the wiper strip support is embedded in the wiper strip body.

Preferably, the embedding distance is greater than half of the height of the side surface of the bar body and less than the height of the side surface of the bar body.

Preferably, the wiper strip support is made of glass fiber or carbon fiber.

Preferably, the scraper bar body is made of fluorinated rubber or polyurethane rubber, and the hardness is 60-80 degrees.

Compared with the prior art, the utility model, it is showing the advantage and is:

(1) the utility model discloses a based on the design of the wet heavy trend of printing in the current scraping strip life cycle, the new scraping strip is gone up the line wet heavy low on the one side, along with the increase of scraping strip printing number of times, and the scraping strip printing end wears and teares into certain radian, and the printing wet heavy just tends to steadily. The utility model discloses a printing end designs into circular-arcly for scrape the wet heavy meeting of strip in whole life cycle and stabilize at certain state, the effective management and control of the wet heavy of printing of being convenient for.

(2) The utility model provides a scrape the strip support and scrape and be equipped with rotation angle between the strip body, can solve the further constriction back of no net knot half tone linewidth, the thick liquids that easily appear when printing to the gauze position of no net knot half tone of current strip of scraping piles up, produces printing problems such as disconnected bars, virtual seal, can effectively promote battery piece outward appearance production yields.

Drawings

FIG. 1 is a schematic view of a squeegee for screen printing;

FIG. 2 is a left side view of a squeegee for screen printing;

FIG. 3 is a left side view of a prior art wiper strip configuration;

FIG. 4 is a top view of a squeegee for screen printing;

fig. 5 is a top view of a prior art wiper strip structure.

The reference numerals in the figures denote the following meanings: 1. a wiper strip body; 2. and a scraping strip bracket.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

A wiper strip for screen printing includes a wiper strip body 1 and a wiper strip holder 2. A groove for the scraper bar bracket 2 to cut into is arranged in the scraper bar body 1. The surface of the scraping bar body 1 is vertical to the upper surface of the scraping bar bracket 2. The lower end of the scraping bar support 2 is embedded into the scraping bar body 1, and the embedding distance is greater than half of the height of the side face of the scraping bar body 1 and smaller than the height of the side face of the scraping bar body 1. As shown in fig. 1 and 2, the joint between the long side and the bottom of the wiper strip body 1 is arc-shaped. The two ends of the printing end at the lower part of the scraping strip body 1 are arc-shaped chamfers, the shapes of the chamfers at the two ends are symmetrical, the chamfer angle is not more than 90 degrees, and the chamfer radius is less than the side width of the scraping strip body 1. Both ends of the lower printing end of the scraping bar body 1 can be used for screen printing.

As shown in fig. 4, a certain angle is formed between the extending direction of the wiper strip body 1 along the long edge and the extending direction of the wiper strip support 2 along the long edge, and the angle is any angle within the range of 0 to 15 degrees. Scrape and be certain angle between strip body 1 and the strip support 2 of scraping, can solve the further constriction back of no net knot half tone linewidth, the thick liquids of easily appearing when printing to the gauze position of no net knot half tone of current strip of scraping piles up, produces the problem of printing such as disconnected bars, virtual seal, can effectively promote battery piece outward appearance production yields.

The scraping bar support 2 is made of glass fiber or carbon fiber, the scraping bar body 1 is made of fluorinated rubber or polyurethane rubber, and the hardness is 60 degrees.

Claims

1. The utility model provides a scrape strip for screen printing, includes scrape strip body (1) and scrape strip support (2), its characterized in that, the long limit of scraping strip body (1) is the arc with the junction of bottom.

2. A wiper strip for screen printing as set forth in claim 1, characterized in that the angle formed by the wiper strip body (1) in the direction of extension of the long side and the wiper strip holder (2) in the direction of extension of the long side is 0-15 degrees.

3. A bar for screen printing as set forth in claim 1, wherein the chamfer angle of the arc is not more than 90 degrees.

4. A wiper strip for screen printing as set forth in claim 1, wherein the wiper strip holder (2) is provided with positioning and mounting holes.

5. A wiper strip for screen printing as set forth in claim 1, characterized in that the lower end of the wiper strip holder (2) is embedded in the wiper strip body.

6. A wiper strip for screen printing as set forth in claim 5, wherein the embedding distance is greater than half the height of the side of the wiper strip body (1) and less than the height of the side of the wiper strip body (1).

7. A wiper strip for screen printing as set forth in claim 1, characterized in that the wiper strip holder (2) is of glass fibre or carbon fibre material.

8. A wiper strip for screen printing as set forth in claim 1, characterized in that the wiper strip body (1) is made of fluorinated rubber or urethane rubber and has a hardness of 60 degrees to 80 degrees.