CN220517802U - Double-scraper assembly for improving printability of screen with narrow opening - Google Patents
Double-scraper assembly for improving printability of screen with narrow opening Download PDFInfo
- Publication number
- CN220517802U CN220517802U CN202322019500.7U CN202322019500U CN220517802U CN 220517802 U CN220517802 U CN 220517802U CN 202322019500 U CN202322019500 U CN 202322019500U CN 220517802 U CN220517802 U CN 220517802U
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- China
- Prior art keywords
- scraper
- doctor blade
- doctor
- narrow opening
- battery piece
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- 230000009977 dual effect Effects 0.000 claims description 15
- 239000013536 elastomeric material Substances 0.000 claims description 2
- 239000007769 metal material Substances 0.000 claims 1
- 239000002002 slurry Substances 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 229910052709 silver Inorganic materials 0.000 abstract description 3
- 239000004332 silver Substances 0.000 abstract description 3
- 238000007639 printing Methods 0.000 description 24
- 238000007650 screen-printing Methods 0.000 description 9
- 238000007790 scraping Methods 0.000 description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000013013 elastic material Substances 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 101100409194 Rattus norvegicus Ppargc1b gene Proteins 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Landscapes
- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model discloses a double-scraper assembly for improving narrow-opening screen printability, which comprises a scraper seat for installing scrapers, wherein the scrapers comprise a first scraper and a second scraper which are arranged in parallel, the first scraper and the second scraper are respectively arranged at two sides of the scraper seat, and the distance between the first scraper and a plane of a battery piece is larger than the distance between the second scraper and the plane of the battery piece; the first scraper is arranged to form a first included angle alpha with the plane of the battery piece, the second scraper is arranged to form a second included angle beta with the surface of the battery piece, the angle of the first included angle alpha is smaller than the angle of the second included angle beta, and in the working process, the first scraper contacts with slurry in front of the second scraper. The utility model can improve the phenomena of pattern disconnection and uneven thickness on the battery piece, improves the yield of the battery piece, reduces the unit consumption of silver, and further reduces the production cost of the battery piece.
Description
Technical Field
The utility model relates to the technical field of solar cell electroplating, in particular to a double-scraper assembly for improving narrow-opening screen printability.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
At present, the HJT battery is manufactured mainly by four procedures, namely: texturing, amorphous silicon coating, TCO coating and screen printing. When in screen printing, paste is poured into one end of the screen printing plate, the scraping strip applies certain pressure to the paste part of the screen printing plate, and meanwhile, the paste moves towards the other end of the screen printing plate, and the paste is extruded onto a printing stock from the mesh of the graph part by the scraping strip in the moving process. In the printing process, the scraping strip is in linear contact with the screen printing plate and the printing stock all the time, the contact line moves along with the movement of the scraping strip, and other parts of the screen printing plate are in a separation state with the printing stock, so that the printing size precision is ensured, and the smearing of the printing stock is avoided. When the scraping strip scrapes the whole printing area, the screen printing plate is separated from the printing stock, the paste is scraped to the initial position by the ink returning knife, and the workbench returns to the feeding position, so that a complete printing stroke is achieved.
At present, the single scraper design is suitable for printing large-opening screen plates such as conventional perc and the like, so as to be suitable for the low unit consumption and high-efficiency design of HJT batteries, the opening of the printing screen plate is further reduced, and HJT low-temperature paste is combined, so that the paste permeability is poorer than that of conventional spherical silver powder by using flake silver powder, the mesh paste is unevenly filled, the single scraper printing mode is matched with the conventional ink return knife for prefilling, the printability fluctuation is larger, and the phenomena of broken lines and uneven thickness are more obvious.
The prior art discloses a dual-doctor type screen printing assembly including a base frame; the first scraper and the second scraper are respectively arranged on two sides of the base frame in a sliding manner, and the arrangement directions of the first scraper and the second scraper are opposite; the first linear motor and the second linear motor respectively drive the first scraper and the second scraper to move along the vertical direction; the first scraper and the second scraper can be alternatively abutted against the screen to complete printing action, so that the time of ink return operation is saved. However, the two scrapers of the screen printer are arranged in opposite directions, one of the scrapers is used for replacing the ink returning cutter to play a role, and although the ink returning time can be saved, the printing quality is not improved, the printing fluctuation is large, and the problems of wire breakage and uneven thickness still exist.
Disclosure of Invention
The utility model aims at: aiming at the problem of larger fluctuation of the printing property of the existing single-scraper printing mode, the double-scraper assembly for improving the printing property of the screen plate with the narrow opening is provided, so that the printing property of a heterojunction battery under the condition of the screen plate with the narrow opening can be effectively improved, the yield of the battery piece is improved, the unit consumption of silver is reduced, and the production cost of the battery piece is further reduced.
The technical scheme of the utility model is as follows:
a dual doctor blade assembly for improving narrow opening screen printability includes a doctor blade holder for mounting a doctor blade,
the doctor blade comprises a first doctor blade and a second doctor blade arranged in parallel with each other,
the first scraper and the second scraper are respectively arranged at two sides of the scraper seat,
the distance between the first scraper and the plane of the battery piece is larger than the distance between the second scraper and the plane of the battery piece;
the first scraper is arranged to form a first included angle alpha with the plane of the battery piece, the second scraper is arranged to form a second included angle beta with the surface of the battery piece, and the angle of the first included angle alpha is smaller than the angle of the second included angle beta.
According to a preferred embodiment, the first angle α is 50-60 ° and the second angle β is 55-90 °.
According to a preferred embodiment, the first angle α is 55 ° and the second angle β is 60 °.
According to a preferred embodiment, the scraper seat comprises a first side facing in the working direction and a second side facing away from the working direction, the first scraper being connected to the first side, the second scraper being connected to the second side, the first scraper being located in front of the second scraper when the scraper seat drives the first scraper and the second scraper to advance in the working direction.
According to a preferred embodiment, the first blade is at a distance of 0.5cm from the plane of the battery sheet greater than the distance of the second blade from the plane of the battery sheet.
According to a preferred embodiment, the first doctor blade comprises a first doctor blade edge and the second doctor blade comprises a second doctor blade edge, the first and second doctor blade edges being of an elastic material. The elastic material is, for example, rubber.
According to a preferred embodiment, the length of the first and second wiping edges is at least equal to the width of the area to be printed.
According to a preferred embodiment, the first scraper comprises a first cutter handle, the second scraper comprises a second cutter handle, and the first scraper and the second scraper are connected to two sides of the scraper seat through the first cutter handle and the second cutter handle respectively.
According to a preferred embodiment, the scraper comprises a scraper frame, wherein the scraper seat is connected with the scraper frame, and balance shafts are respectively arranged on two sides of the scraper frame.
According to a preferred embodiment, the balance shaft is made of metal.
Compared with the prior art, the utility model has the beneficial effects that:
1. the utility model provides an improve two scraper assemblies of narrow opening screen printability, through the first scraper of each other height and angle difference and the concurrent syntropy work under the drive of scraper blade holder, scrape the thick liquids on the silk screen with different heights and dynamics respectively, firstly, carry out prefill through first scraper, make thick liquids distribute evenly, the pattern on the silk screen is filled with even thickness to the thick liquids through second scraper again, improve the pattern broken line and the uneven phenomenon of thickness on the battery piece, the yield of battery piece has been promoted, reduce the unit consumption of silver, and then reduce battery piece manufacturing cost;
2. the double-scraper assembly for improving the printability of the screen with the narrow opening has the advantages that the two scrapers are arranged on the same mounting seat and can be driven by the same air cylinder, the improvement on a machine table is small, the adaptability is good, the operation is simple and convenient, and a user can quickly get up with hands and use the double-scraper assembly conveniently;
3. the utility model provides an improve two scraper assemblies of narrow opening screen printability, the setting of balance shaft on the scraper frame can assist connection scraper frame and printing machine platform, and the balance shaft of scraper frame both sides makes the atress on the scraper blade holder even to the even application of force in both ends of scraper seat for the pressure of scraper blade holder and battery piece plane contact is even, thereby assists the homogeneity degree that promotes thick liquids on the battery piece plane.
Drawings
FIG. 1 is a schematic front view of a dual doctor blade assembly for improving narrow opening screen printability;
FIG. 2 is a schematic side view of a dual doctor assembly for improving narrow opening screen printability.
Reference numerals: 100-doctor blade holder, 110-first side, 120-second side, 200-doctor blade, 210-first doctor blade, 211-first handle, 220-second doctor blade, 221-second handle, 300-doctor blade frame, 310-connecting hole, 320-balance shaft, 400-cell plane.
Detailed Description
It is noted that relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The features and capabilities of the present utility model are described in further detail below in connection with examples.
Example 1
As shown in fig. 1 and 2, the present embodiment provides a dual doctor blade assembly for improving printability of a screen with a narrow opening, including a doctor blade holder 100 for mounting a doctor blade 200. The doctor blade 200 includes a first doctor blade 210 and a second doctor blade 220 disposed in parallel with each other. The first scraper 210 and the second scraper 220 are respectively disposed on two sides of the scraper seat 100. The first blade 210 is spaced from the cell plane 400 a greater distance than the second blade 220 is spaced from the cell plane 400. Preferably, the first blade 210 is spaced from the cell plane 400 by 0.5cm greater than the second blade 220 is spaced from the cell plane 400. The use of the doctor blade 200 having different heights has the following advantageous effects: the slurry is uniformly spread, and the conditions of short lines and uneven thickness are reduced. The higher scraper 200 is used for applying force to the slurry and simultaneously reserving a flowing space for the slurry, so that the slurry can be pushed to spread on the battery plate, and after the slurry spreads uniformly, the lower scraper 200 is used for applying pressure to the spread slurry due to the small flowing space reserved for the slurry, so that the slurry is pushed to permeate and fill the screen pattern, and printing is completed.
The first scraper 210 is disposed at a first angle α with the plane 400 of the battery piece, the second scraper 220 is disposed at a second angle β with the plane of the battery piece, and the angle of the first angle α is smaller than the angle of the second angle β.
According to a preferred embodiment, the first angle α is 50-60 ° and the second angle β is 55-90 °.
According to a preferred embodiment, the first angle α is 55 ° and the second angle β is 60 °.
As shown in fig. 2, the scraper seat 100 includes a first side 110 facing the working direction and a second side 120 facing away from the working direction, the first scraper 210 is connected to the first side 110, the second scraper 220 is connected to the second side 120, and when the scraper seat 100 drives the first scraper 210 and the second scraper 220 to advance along the working direction, the first scraper 210 is located in front of the second scraper 220. After the slurry is spread by the first scraper 210, the second scraper 220 applies force to make the slurry permeate, so that the printing effect is better.
According to a preferred embodiment, the first blade 210 comprises a first scraping edge and the second blade 220 comprises a second scraping edge, the first and second scraping edges being of an elastomeric material. The elastic material is, for example, rubber.
According to a preferred embodiment, the length of the first and second wiping edges is at least equal to the width of the area to be printed for printing. The dual doctor blade assembly of the present application can be used to screen print HJT cells 105mm wide, the dimensions of the first doctor blade 210 and the second doctor blade 220 being: 135mm long and 50.5mm high.
According to a preferred embodiment, the first blade 210 includes a first blade handle 211, the second blade 220 includes a second blade handle 221, and the first blade 210 and the second blade 220 are connected to both sides of the blade holder 100 by the first blade handle 211 and the second blade handle 221, respectively. Preferably, the first and second tool shanks 211 and 221 are bolted to the blade holder 100.
According to a preferred embodiment, the scraper frame 300 for fixing the scraper seat 100 is further included, the scraper frame 300 is further provided with a connection hole 310, and both sides of the connection hole 310 are respectively provided with balance shafts 320. The balance shaft 320 is connected to the doctor frame 300 and the support structure of the printer head, respectively, so that the doctor frame 300 remains balanced and stable during printing. Preferably, the balance shaft 320 is made of metal, such as stainless steel or alloy. The balance shaft 320 can reduce the pressure of the scraper frame 300 on the printer head, and reduce the abrasion and failure rate of the printer head; meanwhile, the balance shafts 320 can keep proper contact pressure between the scraper 200 and the silk screen, and the balance shafts 320 on two sides enable the pressure born by the scraper 200 to be balanced, so that the thickness of slurry is uniform, and the yield of the battery piece is improved.
The foregoing examples merely represent specific embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present application, which fall within the protection scope of the present application.
Claims (10)
1. A dual doctor blade assembly for improving narrow opening screen printability, characterized by comprising a doctor blade holder (100) for mounting a doctor blade (200), said doctor blade (200) comprising a first doctor blade (210) and a second doctor blade (220) arranged side by side with each other,
the first scraper (210) and the second scraper (220) are respectively arranged at two sides of the scraper seat (100),
the distance from the first scraper (210) to the battery piece plane (400) is greater than the distance from the second scraper (220) to the battery piece plane (400);
the first scraper (210) is arranged to form a first included angle alpha with the plane (400) of the battery piece, the second scraper (220) is arranged to form a second included angle beta with the surface of the battery piece, and the angle of the first included angle alpha is smaller than that of the second included angle beta.
2. A dual doctor assembly for improving narrow opening screen printability as claimed in claim 1 wherein said first included angle α is 50-60 ° and said second included angle β is 55-90 °.
3. A dual doctor assembly for improving narrow opening screen printability as claimed in claim 2 wherein said first included angle α is 55 ° and said second included angle β is 60 °.
4. The dual doctor assembly for improving narrow opening screen printability of claim 1 wherein the first doctor blade (210) is spaced from the cell plane (400) by 0.5cm greater than the second doctor blade (220) is spaced from the cell plane (400).
5. The dual doctor assembly for improving narrow opening screen printability of claim 1 wherein the first doctor blade (210) includes a first handle (211) and the second doctor blade (220) includes a second handle (221), the first doctor blade (210) and the second doctor blade (220) being connected to both sides of the doctor blade holder (100) by the first handle (211) and the second handle (221), respectively.
6. The dual doctor assembly for improving narrow opening screen printability as claimed in claim 5 wherein the doctor blade holder (100) includes a first side (110) facing in a working direction and a second side (120) facing away from the working direction, the first doctor blade (210) being connected to the first side (110) and the second doctor blade (220) being connected to the second side (120), the first doctor blade (210) being positioned in front of the second doctor blade (220) when the doctor blade holder (100) advances the first doctor blade (210) and the second doctor blade (220) in the working direction.
7. A dual doctor assembly for improving narrow opening screen printability according to claim 1, further comprising a doctor frame (300), said doctor seat (100) being connected to said doctor frame (300), said doctor frame (300) being provided with a balancing shaft (320) on each side thereof.
8. A dual doctor assembly for improving printability of a narrow opening screen as claimed in claim 7 wherein said balance shaft (320) is of metallic material.
9. The dual doctor assembly for improving narrow opening screen printability of claim 1 wherein the first doctor blade (210) includes a first doctor blade edge and the second doctor blade (220) includes a second doctor blade edge, the first and second doctor blade edges being of an elastomeric material.
10. A dual doctor assembly for improving narrow opening screen printability as claimed in claim 9 wherein the length of the first and second doctor edges is at least equal to the width of the area to be printed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322019500.7U CN220517802U (en) | 2023-07-28 | 2023-07-28 | Double-scraper assembly for improving printability of screen with narrow opening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322019500.7U CN220517802U (en) | 2023-07-28 | 2023-07-28 | Double-scraper assembly for improving printability of screen with narrow opening |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220517802U true CN220517802U (en) | 2024-02-23 |
Family
ID=89936695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322019500.7U Active CN220517802U (en) | 2023-07-28 | 2023-07-28 | Double-scraper assembly for improving printability of screen with narrow opening |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220517802U (en) |
-
2023
- 2023-07-28 CN CN202322019500.7U patent/CN220517802U/en active Active
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