阅读说明：本技术 一种适用于太阳能电池丝网印刷的刮刀装置 (Scraper device suitable for solar cell screen printing ) 是由 张伟 陈鸿 王康民 贾慧君 于 2019-10-17 设计创作，主要内容包括：本发明公开了一种适用于太阳能电池丝网印刷的刮刀装置,包括刀架和设于刀架下方的刮刀以及对称设置在刀架两侧的橡胶挡板,且橡胶挡板可拆卸的连接在刀架侧面,刀架上端沿刮刀长度方向的两侧设有用于调节侧橡胶挡板的间距的第一滑槽；刀架沿刮刀长度方向的两侧设有用于调整橡胶挡板的高度的第二滑槽。本发明针对现有技术中电池片丝网印刷由于干浆较多、影响印刷整体质量,通过在刮刀两侧设置可灵活上下可调节的橡胶挡板,橡胶挡板可以有效防止浆料侧流,降低干浆风险,减少浆料损耗,保障电池片的丝印质量。(The invention discloses a scraper device suitable for solar cell screen printing, which comprises a knife rest, scrapers arranged below the knife rest and rubber baffles symmetrically arranged on two sides of the knife rest, wherein the rubber baffles are detachably connected to the side surface of the knife rest; and second sliding grooves for adjusting the height of the rubber baffle are arranged on two sides of the knife rest along the length direction of the scraper. Aiming at the problem that the screen printing of the battery piece in the prior art has more dry paste and affects the overall printing quality, the rubber baffle plates which can be flexibly adjusted up and down are arranged on the two sides of the scraper, so that the rubber baffle plates can effectively prevent the lateral flow of the paste, reduce the risk of the dry paste, reduce the loss of the paste and ensure the screen printing quality of the battery piece.)

1. The scraper device suitable for screen printing of the solar cell comprises a knife rest (1) and a scraper (2) arranged below the knife rest (1), and is characterized by further comprising rubber baffles (3) symmetrically arranged on two sides of the knife rest (1), wherein the rubber baffles (3) are detachably connected to the side surface of the knife rest (1), and first sliding grooves (11) used for adjusting the distance between the side rubber baffles are formed in two sides of the upper end of the knife rest (1) along the length direction of the scraper (2); and second sliding grooves (12) for adjusting the height of the rubber baffle are formed in the two sides of the knife rest (3) along the length direction of the scraper (2).

2. The scraper device suitable for screen printing of solar cells according to claim 1, wherein the height adjustment range of the bottom of the rubber baffle (3) from the screen (4) for screen printing of solar cells is 1 mm-10 mm.

3. A doctor blade device suitable for screen printing of solar cells, according to claim 2, characterised in that the doctor blade (2) has a height of 45-54 mm and a width of 180-190 mm.

4. A squeegee assembly according to claim 3, wherein the plane of the sides of the squeegee (2) and the plane of the screen (4) form an angle α in the direction of travel, and wherein the angle α is 55 °.

5. A squeegee assembly according to claim 1, wherein the first runner (11) is a cross-shaped runner and the second runner (12) is a hexagonal runner.

6. A squeegee device suitable for screen printing of solar cells according to claim 1, wherein the squeegee (2) is spaced from the rubber barrier (3) by a distance of 2mm to 5 mm.

Technical Field

The invention relates to the technical field of solar cell production, in particular to a scraper device suitable for solar cell screen printing.

Background

A solar cell, also called a "solar chip" or a "photovoltaic cell", is a photoelectric semiconductor sheet that directly generates electricity by sunlight, and can output voltage instantaneously and generate current in the presence of a circuit as long as it is illuminated by light satisfying a certain illumination condition. The conventional solar cell production flow comprises the procedures of texturing, diffusion, etching, screen printing and the like. .

In the process of screen printing of the solar cell, the size of a printing area is required to be between the patterns of the screen printing plate (4), and the range of the printing pattern is matched with the size of the cell; in the printing process, screen printing is composed of five major elements, namely a screen plate, a scraping scraper, ink, a printing table and a printing stock. The basic principle of screen printing is as follows: the basic principle that the meshes of the image-text part and the non-image-text part of the screen printing plate are ink-permeable and ink-impermeable is utilized for printing. When printing, ink is poured into one end of the screen printing plate, a scraping scraper plate applies a certain pressure on the ink position on the screen printing plate and moves towards the other end of the screen printing plate, the ink is extruded onto a printing stock from meshes of the image-text part by the scraper plate in the moving process, and the print is fixed in a certain range due to the viscosity of the ink. If the added amount of the slurry is large, the drying speed of the slurry outside the printed graph can be accelerated, the slurry is wasted, and the dried slurry has certain adverse effects on the printing effect and the service life of the screen printing plate.

Among the manufacturing costs of solar cells, the cost of the paste and screen printing plate for screen printing is the highest, and how to reduce the loss of the paste and improve the printing quality becomes one of the key points of reducing the cost of manufacturing the solar cells. In the process of screen printing, the slurry in the screen printing plate flows to the edge of the screen printing plate along with the movement of a scraper and a material return knife, and the slurry at the edge of the screen printing plate is dried slowly to form dry slurry; the dry slurry cannot be used, and further, if the dry slurry is brought into a printing area by a scraper or a feed back knife, the dry slurry can cause abrasion of a screen printing plate, the electrode printing quality of the battery piece is influenced, and even the batch is poor. The traditional screen printing adopts a 60-degree knife rest design, and because the printing pressure of a scraper on a screen printing plate is large, broken grids and virtual printing are easy to occur in the printing process, and the whole printing effect is not good.

Therefore, in order to save the slurry and reduce the product cost, the slurry needs to be controlled in a specific area of the screen, for this reason, many patents relate to adding baffles on both sides of the scraper, such as patent 201110211667.2, 201210539501.8, 201220690035.9, etc., but in the actual production process, the height, the distance, etc. of the two baffles need to be adjusted to the optimal position, and the proper scraper angle can ensure the normal printing of the slurry, so that the slurry can be scraped into the specific area without damaging the screen, and the bottom ends of the two baffles are ensured to be on the same level, thereby not affecting the printing quality, and being beneficial to reducing the wear to the screen and prolonging the service life of the screen.

In fact, how to provide a scraper device suitable for solar cell screen printing, which has a reasonable structural design, optimized scraper angle and adjustable baffle setting, is a problem that needs to be solved urgently by those skilled in the art.

Disclosure of Invention

In view of the above, the invention provides the scraper device which is reasonable in structural design, optimized in scraper angle and adjustable in baffle and is suitable for solar cell screen printing. The battery piece screen printing device overcomes the defects that the screen printing of the battery piece has more dry paste and affects the printing quality in the prior art, and the flexible adjustable rubber baffles are arranged on the two sides of the scraper, so that the side flow of the paste can be effectively prevented, the risk of dry paste is reduced, and the printing quality is guaranteed.

In order to achieve the purpose, the invention adopts the following technical scheme: a scraper device suitable for screen printing of a solar cell comprises a knife rest, scrapers arranged below the knife rest and rubber baffles symmetrically arranged on two sides of the knife rest, wherein the rubber baffles are detachably connected to the side surfaces of the knife rest, and first sliding grooves used for adjusting the distance between the side rubber baffles are arranged on two sides of the upper end of the knife rest along the length direction of the scrapers; and second sliding grooves for adjusting the height of the rubber baffle are formed in the two sides of the knife rest along the length direction of the scraper.

Aiming at the problem that the screen printing of the battery piece in the prior art has more dry paste and affects the overall printing quality, the rubber baffle plates which can be flexibly adjusted up and down are arranged on the two sides of the scraper, so that the rubber baffle plates can effectively prevent the lateral flow of the paste, reduce the risk of the dry paste, reduce the loss of the paste and ensure the screen printing quality of the battery piece.

Further, the height adjusting range of the distance from the bottom of the rubber baffle to a screen printing plate for screen printing of the solar cell is 1-10 mm.

The invention can ensure that the printing area becomes a relatively closed environment by adjusting the height from the rubber baffle to the screen printing plate, thereby enabling the slurry for screen printing of the solar cell to be more easily controlled within the range of a printing figure, achieving the process requirement and greatly improving the quality and effect of screen printing; and can be according to the printing demand of difference, rationally adjust the height of rubber baffle to the half tone, also reduced the auxiliary material loss, reduced the frequency that the operator shoveled the thick liquids, improved economic benefits for the enterprise.

Further, the height of the scraper is 45 mm-54 mm, and the width of the scraper is 180 mm-190 mm.

Furthermore, an included angle α is formed between the side plane of the scraper and the plane of the screen printing plate in the traveling direction, and the included angle α is 55 degrees.

Compared with the conventional 60-degree design, the angle between the scraper and the screen printing plate is designed to be 55 degrees, so that the longitudinal pressure on the screen printing plate is reduced in the operation process of the scraper, the damage of the scraper to the screen printing plate is reduced, the service life of the screen printing plate is prolonged, a transverse larger shearing force is provided for the screen printing plate, meshes on the screen printing plate are spread, the ink overflow of slurry is facilitated, the broken grids and the virtual printing are obviously improved, and the whole printing performance is improved.

Furthermore, the first sliding groove is a cross-shaped sliding groove, and the second sliding groove is a hexagonal sliding groove.

The first sliding chute is a cross sliding chute, so that the position of the rubber baffle can be adjusted in multiple directions, the front, back, left and right positions of the rubber baffle are controlled, the adjustment is convenient according to actual production requirements, the material return effect of the rubber baffle is guaranteed, and the printing quality is guaranteed;

the second chute is a hexagonal chute, so that the height position of the rubber baffle can be flexibly adjusted, the scraping and returning pressure of the rubber baffle is adjusted, and the scraping effect is ensured and the silk-screen printing plate is prevented from being damaged.

Furthermore, the distance between the scraper and the rubber baffle is 2-5 mm.

The invention has the beneficial effects that:

1. the invention provides a scraper device suitable for solar cell screen printing, wherein rubber baffles are symmetrically arranged at two ends of a scraper, so that slurry can be prevented from flowing to two sides in a screen printing process, the risk of dry slurry caused by slurry accumulation is reduced, and the screen printing quality of a cell is guaranteed.

2. The invention provides a scraper device suitable for screen printing of a solar cell, wherein two sides of the upper end of a knife rest along the length direction of a scraper are provided with first sliding grooves for adjusting the distance between side rubber baffles; the first chute can carry out multidirectional regulation to rubber baffle's position to control rubber baffle's position all around, and then control feed back wing position all around, be convenient for adjust according to the actual production demand, guarantee feed back wing's feed back effect, guarantee printing quality. The knife rest is equipped with the second spout that is used for adjusting the height of rubber baffle along scraper length direction's both sides, and the setting of second spout makes the height position of feed back wing also can adjust in a flexible way to the material feed back pressure of scraping of adjustment feed back wing also avoids causing the damage to the screen printing version when guaranteeing to scrape the material effect.

3. The invention provides a scraper device suitable for solar cell screen printing, wherein the height adjustable range of the bottom of a rubber baffle from a screen printing plate is 1-10 mm, the bottom of the rubber baffle is prevented from directly contacting with the screen printing plate, especially when the screen printing pressure is larger, the softer rubber baffle is used for directly scraping and returning materials to the screen printing plate, the screen printing plate is further prevented from being damaged, and the screen printing safety is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic diagram of an overall structure of a scraper device suitable for screen printing of a solar cell according to the present invention.

Fig. 2 is a schematic diagram of a scraper structure of a scraper device suitable for screen printing of a solar cell according to the present invention.

Wherein: the device comprises a knife rest 1, a first sliding groove 11, a second sliding groove 12, a scraper 2, a rubber baffle 3 and a screen printing plate 4.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in reference to figures 1-2,

the invention discloses a scraper device suitable for solar cell screen printing, which comprises a knife rest 1, scrapers 2 arranged below the knife rest 1 and rubber baffles 3 symmetrically arranged on two sides of the knife rest 1, wherein the rubber baffles 3 are detachably connected to the side surface of the knife rest 1, and first sliding grooves 11 for adjusting the distance between the side rubber baffles are arranged on two sides of the upper end of the knife rest 1 along the length direction of the scrapers 2; and second sliding grooves 12 for adjusting the height of the rubber baffle are arranged on two sides of the knife rest 3 along the length direction of the scraper 2.

Aiming at the problem that the screen printing quality of the battery piece in the prior art is influenced by more dry paste, the rubber baffle plates 3 which can be flexibly adjusted up and down are arranged on the two sides of the scraper, so that the rubber baffle plates 3 can effectively prevent the lateral flow of the paste, reduce the risk of the dry paste, reduce the loss of the paste and ensure the screen printing quality of the battery piece.

In the embodiment, the height adjustment range of the distance from the bottom of the rubber baffle 3 to the screen (4) for screen printing of the solar cell is 1 mm-10 mm.

According to the invention, the printing area can be ensured to be a relatively closed environment by adjusting the height from the rubber baffle 3 to the screen printing plate 4, so that the size for screen printing of the solar cell slice can be controlled in the range of a printing pattern more easily, the process requirement is met, and the quality and effect of screen printing are greatly improved; and can be according to the printing demand of difference, rationally adjust the height of 3 to half tone 4 of rubber baffle, also reduced the auxiliary material loss, reduced the frequency that the operator shoveled the thick liquids, improved economic benefits for the enterprise.

In this embodiment, the height of the doctor blade 2 is 45mm to 54mm, and the width thereof is 180mm to 190 mm.

In this embodiment, the side plane of the scraper 2 and the plane of the screen 4 form an angle α in the traveling direction, and the angle α is 55 °.

The included angle between the scraper 2 and the screen printing plate 4 is designed to be 55 degrees, compared with the conventional 60-degree design, the vertical pressure on the screen printing plate 4 is reduced in the operation process of the scraper 2, the damage of the scraper 2 on the screen printing plate 4 is reduced, the service life of the screen printing plate 4 is prolonged, a transverse large shearing force is provided for the screen printing plate 4, meshes on the screen printing plate 4 are spread, and therefore the method is beneficial to the ink overflow of slurry, the obvious improvement of broken grids and virtual printing and the improvement of the whole printability.

In this embodiment, the first sliding slot 11 is a cross-shaped sliding slot, and the second sliding slot 12 is a hexagonal sliding slot.

The first chute 11 is a cross chute, and can adjust the position of the rubber baffle 3 in multiple directions, so that the front, back, left and right positions of the rubber baffle 3 are controlled, the adjustment is convenient according to the actual production requirement, the material return effect of the rubber baffle 3 is guaranteed, and the printing quality is guaranteed;

the second chute 12 is a hexagonal chute, so that the height of the rubber baffle 3 can be flexibly adjusted, the material scraping and returning pressure of the rubber baffle 3 is adjusted, and the damage to the screen printing plate 4 is avoided while the material scraping effect is ensured.

In this embodiment, the distance between the scraper 2 and the rubber baffle 3 is 2mm to 5 mm.

The invention has the beneficial effects that:

1. the invention provides a scraper device suitable for solar cell screen printing, wherein rubber baffles 3 are symmetrically arranged at two ends of a scraper 2, so that slurry can be prevented from flowing to two sides in the screen printing process, the risk of dry slurry caused by slurry accumulation is reduced, and the screen printing quality of a cell is guaranteed.

2. The invention provides a scraper device suitable for solar cell screen printing, wherein two sides of the upper end of a knife rest 1 along the length direction of a scraper 2 are provided with first sliding grooves 11 for adjusting the distance between side rubber baffles; first spout 11 can carry out multidirectional regulation to rubber baffle 3's position to control rubber baffle 3 all around the position, and then control the position all around of feed back wing, be convenient for adjust according to actual production demand, the feed back effect of guarantee feed back wing, guarantee printing quality. The two sides of the knife rest 3 along the length direction of the scraper 2 are provided with second sliding grooves 12 for adjusting the height of the rubber baffle, and the height positions of the return wings can be flexibly adjusted by the aid of the second sliding grooves 12, so that the scraping and return pressure of the return wings is adjusted, the scraping effect is guaranteed, and meanwhile, the silk screen printing plate 4 is prevented from being damaged.

3. The invention provides a scraper device suitable for solar cell screen printing, wherein the height adjustable range of the bottom of a rubber baffle 3 from a screen printing plate 4 is 1-10 mm, the bottom of the rubber baffle 3 is prevented from directly contacting the screen printing plate 4, especially when the screen printing pressure is larger, the softer rubber baffle 3 is used for directly scraping and returning materials to the screen printing plate 4, the screen printing plate 4 is further prevented from being damaged, and the screen printing safety is improved.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.