Scraper assembly for silk-screen printing and printing equipment

Abstract

The utility model discloses a scraper assembly and printing equipment for silk-screen printing, and the scraper assembly comprises a scraper rest which is provided with a mounting part; a scraping strip is arranged at the lower end of the scraping plate, a plurality of material passing holes are formed in the scraping strip, passing grooves are formed in the two sides of the scraping plate, and the passing grooves are located in the upper side of the scraping strip; and the pressing plate is used for connecting the scraper with the scraper rest. The screen printing plate has the advantages that the design of the scraper is improved, the scraper is designed to be perforated, slurry can penetrate through the scraper and directly fall into a printing area after being stressed, slurry accumulation on the two sides is reduced, slurry loss is reduced, the screen printing plate explosion probability is reduced, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of screen printing, in particular to a scraper assembly and printing equipment used for screen printing. Background Art

[0002] The principle of screen printing is to use the mesh of the graphic part of the screen to allow ink to penetrate, while the mesh of the non-graphic part does not allow ink to penetrate. The screen is squeezed by a scraper bar, and the slurry is leaked onto the material to be printed after elastic deformation. With the continuous development of the solar photovoltaic industry, cost reduction and efficiency improvement are becoming more and more significant. Screen printing is the most mainstream printing method. With the increase of printing speed and long-term continuous printing, the slurry will accumulate on both sides of the screen, forming dry slurry, which not only wastes slurry, but also causes printing defects, uneven force on the screen, and cracking, resulting in higher costs.

[0003] The scraper in the prior art is integrated. For example, the utility model patent with authorization announcement number CN 202895894U discloses a scraper bar and a scraper for screen printing, which are full-plate type. During the printing process of the screen slurry, a large amount of slurry will overflow on both sides, which will cause dry slurry for a long time, resulting in printing defects and screen explosion. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a scraper assembly and printing equipment for screen printing. By improving the design of the scraper, the scraper is designed to be a perforated type. After the slurry is subjected to force, it will pass through the scraper and fall on the printing area, reducing the accumulation of slurry on both sides, thereby reducing slurry loss, reducing the probability of screen explosion, and reducing production costs.

[0005] Specifically, the utility model discloses a scraper assembly for screen printing, comprising:

[0006] The scraper holder is provided with a mounting portion;

[0007] A scraper, wherein a scraper strip is provided at the lower end of the scraper, a plurality of material passing holes are provided on the scraper strip, and passing grooves are provided on both sides of the scraper, and the passing grooves are located on the upper side of the scraper strip;

[0008] A pressure plate is used to connect the scraper to the scraper holder.

[0009] The benefit of adopting the above technical solution is that the design of the scraper is improved. The scraper is designed to be perforated. When the slurry is subjected to force, it will pass through the scraper and fall on the printing area, reducing the accumulation of slurry on both sides, thereby reducing slurry loss, reducing the probability of screen explosion, extending the service life of the screen, and reducing production costs.

[0010] Furthermore, the scraper holder is provided with a plurality of fixed shafts, and the scraper is provided with shaft holes matching with the fixed shafts.

[0011] The advantage of adopting the above technical solution is that the setting of the fixed shaft plays a positioning role, which facilitates the connection between the scraper and the scraper holder. The position of the scraper is fixed before installation, which facilitates installation.

[0012] Furthermore, the mounting portion is provided with a plurality of threaded holes, the scraper is provided with mounting holes corresponding to the threaded holes, and the pressure plate is used to press and fix the scraper and the mounting portion by screws.

[0013] The advantage of adopting the above technical solution is that the scraper and the scraper holder are pressed together by a pressure plate and then fixed with screws to achieve detachable installation of the scraper. When the scraper needs to be replaced, only the screws on the scraper need to be removed, and the scraper is fixed and tightened, making installation easy.

[0014] Furthermore, the mounting portion has an inclined surface.

[0015] The benefit of adopting the above technical solution is that when the inclined surface is set, a certain angle is formed between the scraper and the lower screen, which can better scrape the slurry evenly and ensure the quality of screen printing.

[0016] Furthermore, material guiding slopes are provided on both sides of the scraper strip, and the upper ends of the material guiding slopes are connected to the bottom of the passing groove.

[0017] The benefit of adopting the above technical solution is that the setting of the guide slope makes it easy to guide the slurry on both sides of the scraper into the through groove, effectively reducing the accumulation of slurry on both sides, saving slurry, and at the same time increasing the service life of the screen.

[0018] Furthermore, the plurality of feed holes are arranged at consistent intervals.

[0019] The benefit of adopting the above technical solution is that the evenly arranged material holes evenly guide the excess slurry to the back side of the scraper during scraping, thereby reducing the accumulation of excessive slurry in one location and ensuring the quality of the next printing.

[0020] Furthermore, the length of the through slot is 20 to 30 mm.

[0021] The benefit of adopting the above technical solution is that it can ensure the slurry to move smoothly to the outside of the groove while ensuring the strength of the scraper and extending the service life of the scraper.

[0022] Furthermore, the present application also discloses a printing device, including the scraper assembly for screen printing described in the above technical solution, and also includes: a frame, a feeding assembly, an ink return knife, and a screen, wherein the screen is arranged on the lower side of the scraper, and the ink return knife is arranged on the side of the scraper.

[0023] The benefit of adopting the above technical solution is that the feeding component is used to provide slurry, and the ink return knife is used to scrape the excess slurry back to the initial position, which is convenient for the next printing. The overall printing quality is good, the proportion of printing line breaks, virtual printing, etc. is reduced, and the printing quality is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required to be used in the embodiments or the description of the prior art will be briefly introduced below.

[0025] Figure 1 This is an exploded view of the overall structure of the scraper assembly used for screen printing in the utility model.

[0026] Figure 2 This is a schematic diagram of the utility model of slurry passing through the material hole and the groove

[0027] The reference numerals in the accompanying drawings are as follows:

[0028] The scraper holder 1; the mounting portion 11; the fixed shaft 12; the scraper 2; the scraper strip 21; the material guide slope 211; the material passing hole 22; the passing groove 23; the mounting hole 24; the pressing plate 3; the screen 4. DETAILED DESCRIPTION

[0029] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0030] like Figure 1-2 As shown, the utility model discloses a scraper assembly for screen printing, comprising:

[0031] The scraper holder 1 is provided with a mounting portion 11;

[0032] A scraper 2, wherein a scraper strip 21 is disposed at the lower end of the scraper 2, the scraper strip 21 is elastically detachable, a plurality of material passing holes 22 are disposed on the scraper strip 21, and through grooves 21 are disposed on both sides of the scraper 2, and the through grooves 21 are located on the upper side of the scraper strip 21;

[0033] The pressing plate 3 is used to connect the scraper 2 with the scraper holder 1 .

[0034] The benefit of adopting the above technical solution is that the design of the scraper 2 is improved. The scraper 2 is designed to be perforated. After the slurry is subjected to force, it will pass through the scraper 2 and fall on the printing area, reducing the accumulation of slurry on both sides, thereby reducing slurry loss, reducing the probability of screen 4 explosion, and reducing production costs.

[0035] In some embodiments, a plurality of fixed shafts 12 are disposed on the scraper holder 1, and shaft holes matching the fixed shafts 12 are disposed on the scraper plate 2. The fixed shafts 12 are symmetrically disposed on the mounting portion 11.

[0036] The setting of the fixed shaft 12 plays a positioning role, which facilitates the connection between the scraper 2 and the scraper holder 1. The position of the scraper 2 is fixed before installation to facilitate installation.

[0037] In some embodiments, the mounting portion 11 is provided with a plurality of threaded holes, the scraper 2 is provided with mounting holes 24 corresponding to the threaded holes, and the pressure plate 3 is used to press and fix the scraper 2 and the mounting portion 11 by screws. The pressure plate 3 is a strip-shaped pressure plate, and the surface pressed against the scraper 2 is a plane. The pressure plate 3 is provided with chamfers around it to prevent scratches on personnel.

[0038] The benefit of adopting the above technical solution is that the scraper 2 and the scraper holder 1 are pressed together by the pressure plate 3 and then fixed with screws to achieve detachable installation of the scraper 2. When the scraper 2 needs to be replaced, it is only necessary to remove the screws on the scraper 2, and it is fixed and fastened, making installation easy.

[0039] Furthermore, the mounting portion 11 has an inclined surface, which faces the screen 4 at the lower side, and the inclined angle is set according to needs.

[0040] When the inclined surface is set, a certain angle is formed between the scraper 2 and the lower screen 4, which can better scrape the slurry onto the bottom printing product and ensure the quality of screen printing.

[0041] In some embodiments, material guiding slopes 211 are provided on both sides of the scraper bar 21 , and the upper ends of the material guiding slopes 211 are connected to the bottom of the through slot 21 .

[0042] The benefit of adopting the above technical solution is that the setting of the guide slope 211 facilitates the slurry on both sides of the scraper 2 to be introduced into the through groove 21, effectively reducing the accumulation of slurry on both sides, saving slurry, and at the same time increasing the service life of the screen 4.

[0043] In some embodiments, a plurality of feed holes 22 are arranged at uniform intervals, and the intervals can be set as needed. The evenly arranged feed holes 22 evenly guide excess slurry to the rear side of the scraper 2 during scraping, thereby reducing excessive accumulation of slurry at one location and ensuring the quality of the next printing.

[0044] Furthermore, the length of the through groove 21 is 20 to 30 mm, which ensures that the slurry can smoothly move to the outside of the through groove 21 and at the same time ensures the strength of the scraper 2, thereby extending the service life of the scraper 2.

[0045] The present application also discloses a printing device, including the scraper assembly for screen printing described in the above technical solution, and also includes: a frame, a feeding assembly, an ink return knife, a screen 4, the screen 4 is arranged on the lower side of the scraper 2, the ink return knife is arranged on the side of the scraper 2, the scraper blade frame 1 is arranged in the frame and is connected with a lifting assembly and a translation module, which can be lifted and translated, the lifting assembly can be a cylinder or a lifting module, and the translation assembly can be a screw motor module.

[0046] Working process,

[0047] 1. During printing, the feeding assembly adds slurry onto the screen 4, and the scraper 2 moves up and down under the control of the lifting assembly, exerting a certain pressure on the screen 4 while moving toward the other end of the screen 4;

[0048] 2. The slurry is squeezed from the mesh holes on the screen 4 onto the substrate silicon wafer during movement, and is fixed within a certain range due to the viscosity;

[0049] 3. The screen 4 generates a rebound force on the scraper 21 through its own tension, so that the screen 4 and the substrate are only in moving line contact;

[0050] 4. The screen 4 and the substrate are separated, the slurry and the screen are broken and moved, and the slurry is accumulated on the silicon wafer;

[0051] 5. After scraping across the entire screen surface, the scraper 2 is lifted up, and the screen 4 is also lifted up. The slurry is gently scraped back to the initial position through the ink return knife, the silicon wafer is replaced, and printing continues.

[0052] The present application can effectively allow the slurry to pass through and is not prone to accumulation on both sides, thereby reducing the risk of dry slurry and the risk of screen explosion, effectively saving production costs, improving the overall printing quality, reducing the proportion of printing line breaks and false printing, improving printing quality, and improving printing efficiency.

[0053] For ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the utility model, which all fall within the protection scope of the utility model.

Claims

1. A scraper assembly for screen printing, characterized in that: include: The scraper holder (1) is provided with a mounting portion (11); A scraper (2), wherein a scraper strip (21) is disposed at the lower end of the scraper (2), a plurality of material passing holes (22) are disposed on the scraper strip (21), and passing grooves (23) are disposed on both sides of the scraper (2), and the passing grooves (23) are located on the upper side of the scraper strip (21); The pressing plate (3) is used to connect the scraper (2) to the scraper holder (1).

2. The scraper assembly for screen printing according to claim 1, characterized in that: The scraper frame (1) is provided with a plurality of fixed shafts (12), and the scraper (2) is provided with shaft holes matching the fixed shafts (12).

3. The scraper assembly for screen printing according to claim 2, characterized in that: The mounting portion (11) is provided with a plurality of threaded holes, the scraper (2) is provided with mounting holes (24) corresponding to the threaded holes, and the pressing plate (3) presses and fixes the scraper (2) and the mounting portion (11) by means of screws.

4. The scraper assembly for screen printing according to claim 3, characterized in that: The mounting portion (11) has an inclined surface.

5. The scraper assembly for screen printing according to claim 1, characterized in that: Material guiding inclined surfaces (211) are arranged on both sides of the scraper strip (21), and the upper ends of the material guiding inclined surfaces (211) are connected to the bottom of the passing groove (23).

6. The scraper assembly for screen printing according to claim 1, characterized in that: The plurality of material passing holes (22) are arranged at uniform intervals.

7. The scraper assembly for screen printing according to claim 1, characterized in that: The length of the through slot (23) is 20 to 30 mm.

8. A printing device, characterized in that: The scraper assembly for screen printing comprises the scraper assembly as described in any one of claims 1 to 7, and further comprises: a frame, a feeding assembly, an ink return knife, a screen (4), wherein the screen (4) is arranged on the lower side of the scraper (2), and the ink return knife is arranged on the side of the scraper (2).

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