Scraper of printing machine and printing machine

Abstract

The utility model discloses a scraper of a printing machine and the printing machine. The scraper comprises a printing machine head; the scraping strip is arranged on the printing machine head and can move under the driving of the printing machine head, and the scraping strip is provided with a scraping area used for scraping and coating the sizing agent on the screen printing plate; the two ends, perpendicular to the blade coating direction, of the scraping strip are provided with the grid blocks respectively, the grid blocks are provided with matching faces, and the matching faces and the scraping area are coplanar. According to the scraper of the printing machine, the grids are arranged at the two ends of the scraping strip, the matching faces of the grids and the scraping area of the scraping strip are coplanar, the phenomenon that slurry flows towards the two sides of a screen printing plate can be effectively improved, a large amount of dry slurry is not prone to occurring, and therefore the utilization rate of the slurry is increased, the printing service life of the screen printing plate is prolonged, and the printing quality of the screen printing plate is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the printing technical field more particularly, relate to a scraper and printing machine of printing machine. BACKGROUND

[0002] Solar cell piece as the core component of photovoltaic power generation system, its production quality directly influences the performance and life of entire system. In the silk screen printing link of cell piece, scraper printing quality is particularly important.

[0003] In the related art, the slurry flows to both sides of the screen during the printing process, and a large amount of dry slurry is formed at the edges of both sides of the slurry, resulting in a decrease in slurry utilization rate. In addition, long-term accumulation of the slurry can cause a change in tension of the screen, affecting the printing quality and causing edge cracking and burst of the screen, thereby affecting the overall life of the screen. SUMMARY

[0004] The utility model discloses at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a scraper of a printing machine, which effectively improves the slurry side flow problem, improves the slurry utilization rate, the service life of the screen and the printing quality.

[0005] The utility model further provides a printing machine with the above-mentioned scraper.

[0006] The scraper of the printing machine according to the utility model embodiment comprises a printing head, a scraping strip, the scraping strip is arranged on the printing head and is movable under the driving of the printing head, the scraping strip has a scraping area for scraping the slurry on the screen, and a barrier is arranged at both ends of the scraping strip perpendicular to the scraping direction, and the barrier has a matching surface coplanar with the scraping area.

[0007] The scraper of the printing machine according to the utility model embodiment can effectively improve the phenomenon that the slurry flows to both sides of the screen, is not prone to a large amount of dry slurry, thereby improving the utilization rate of the slurry and improving the printing life and printing quality of the screen.

[0008] In addition, the scraper of the printing machine according to the above-mentioned embodiment of the utility model can also have the following additional technical features:

[0009] According to some embodiments of the utility model, in the scraping direction of the scraping strip, the front end edge of the barrier has a convex arc surface connected with the matching surface.

[0010] According to some embodiments of the present application, the printing head has a mounting slope, an angle between the mounting slope and the screen plate is α, the scraping strip is mounted on the mounting slope, an angle between the matching surface and the mounting slope is β, and α is equal to β.

[0011] According to some embodiments of the present application, the scraper further comprises a scraping plate, the scraping plate is mounted on the mounting slope, the scraping strip is mounted on a side of the scraping plate which is away from the mounting slope, and a distance between the scraping plate and the screen plate is greater than a distance between the matching surface and the screen plate.

[0012] According to some embodiments of the present application, the scraping area is an edge of the scraping strip, the scraping strip has a first surface and a second surface which are located on two sides of the edge, the barrier is arranged on the first surface, and an angle between the second surface and the matching surface is less than 180°.

[0013] According to some embodiments of the present application, the scraping strip and the barrier are made of the same material.

[0014] According to some embodiments of the present application, the scraping strip and the barrier are made of rubber.

[0015] According to some embodiments of the present application, the scraping strip and the barrier are integrally formed.

[0016] According to some embodiments of the present application, the printing head is provided with a blocking lug at each end which is perpendicular to the scraping direction, the two blocking lugs are located on sides of the two barriers which are away from each other, a distance between the blocking lug and the screen plate is less than a distance between the printing head and the screen plate, and a distance between the blocking lug and the screen plate is greater than a distance between the matching surface and the screen plate.

[0017] The printing machine according to the embodiments of the present application comprises the scraper according to the embodiments of the present application.

[0018] The additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which:

[0020] Figure 1 is a structural schematic view of the scraper according to the embodiments of the present application;

[0021] Figure 2 is a partial structural schematic view of an angle of the scraper according to the embodiments of the present application;

[0022] Figure 3 FIG. 6 is another angle of a partial structure diagram of a squeegee according to an embodiment of the present application.

[0023] Reference signs:

[0024] Squeegee 100; screen 200;

[0025] Printing machine head 10; installation slope 11;

[0026] Squeegee strip 20; squeegee area 21; edge 22; first surface 23; second surface 24;

[0027] Stop 30; matching surface 31; convex arc surface 32;

[0028] Squeegee plate 40. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.

[0030] In the description of the present application, it is understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0031] In the description of the present application, "first feature", "second feature" can include one or more features, the meaning of "multiple" is two or more, and "above" or "below" the first feature in the second feature can include direct contact of the first and second features, or can include indirect contact of the first and second features through another feature therebetween, "above", "above" and "above" of the first feature in the second feature include the first feature directly above and obliquely above the second feature, or only indicate that the first feature is higher than the second feature in horizontal height.

[0032] Solar cell as the core component of photovoltaic power generation system, its production quality directly affects the performance and life of the whole system. In the screen printing process of the cell, the printing quality of the doctor blade is particularly important.

[0033] In the related art, the middle part of the screen is the printing area and the edge is the composite area for fixing the screen during printing, and the doctor blade moves from back to front and scrapes the paste on the screen to realize printing. During printing, the paste will flow to the left and right sides of the screen, and a large amount of dry paste will be formed at the composite area on both sides of the paste. Not only the utilization rate of the paste is reduced, but also the paste is accumulated for a long time, which will cause the tension of the screen to change, affect the printing quality, and cause the composite area of the screen to crack and burst, thereby affecting the overall life of the screen.

[0034] Therefore, the doctor blade of the printing machine is provided, which can effectively improve the phenomenon that the paste flows to both sides of the screen, is not prone to a large amount of dry paste, thereby improving the utilization rate of the paste and improving the printing life and printing quality of the screen.

[0035] The doctor blade of the printing machine according to the embodiments of the present application will be described below with reference to the accompanying drawings.

[0036] Referring to Figures 1-3 According to the doctor blade 100 of the printing machine of the embodiments of the present application, the printing machine head 10, the doctor blade 20 and the barrier 30 can be included.

[0037] Specifically, the doctor blade 20 is arranged on the printing machine head 10, and the doctor blade 20 is movable under the driving of the printing machine head 10. The doctor blade 20 has a scraping area 21 for scraping the paste on the screen 200. The two ends of the doctor blade 20 perpendicular to the scraping direction are respectively provided with the barrier 30, and the barrier 30 has a matching surface 31 which is coplanar with the scraping area 21.

[0038] During printing, the paste can be pre-coated on the screen 200, and then the printing machine head 10 drives the doctor blade 20 to move, for example Figure 1 The paste is placed on the screen 200 and located in front of the doctor blade 20, and the doctor blade 20 is driven to move in the front-back direction, so that the scraping area 21 of the doctor blade 20 can scrape the paste on the screen 200, so that the paste can be uniformly spread on the screen 200 and pass through the screen 200, and the printing is completed.

[0039] During printing, the scraping area 21 can be in contact with the surface of the screen 200, or can be spaced apart to set a gap according to actual needs. Here, the scraping area 21 can be a plane, a curved surface or an edge 22 structure.

[0040] The barrier 30 is arranged at the two ends of the doctor blade 20, for example Figure 2As shown, the baffles 30 are arranged at the left end and the right end of the scraping strip 20, so that in the printing process, the baffles 30 at the two ends can be respectively located on the two sides (such as the left side and the right side) of the printing area of the screen 200 perpendicular to the scraping direction, and the baffles 30 can block the paste from flowing to the two sides through the gap between the baffles 30 and the screen 200, thereby effectively reducing or avoiding the problem of paste accumulation on the two sides of the screen 200.

[0041] In the embodiment, the fitting surface 31 of the baffle 30 is coplanar with the scraping area 21, so that in the printing process, the fitting surface 31 and the scraping area 21 are respectively in contact with the screen 200, and the blocking effect of the baffles 30 on the side flow of the paste is greatly improved. The paste can be printed in the printing area, the utilization rate of the paste is improved, and a large amount of dry paste is not easy to form on the two sides of the screen 200, so that the tension of the screen 200 is not changed or changes little, the screen 200 is not easy to crack or even burst, the service life of the screen 200 is improved, and the printing quality is improved.

[0042] According to the scraper 100 of the printing machine, the baffles 30 are arranged at the two ends of the scraping strip 20, and the fitting surface 31 of the baffle 30 is coplanar with the scraping area 21 of the scraping strip 20, so that the phenomenon of paste flowing to the two sides of the screen 200 can be effectively improved, a large amount of dry paste is not easy to appear, the utilization rate of the paste is improved, and the printing life and the printing quality of the screen 200 are improved.

[0043] According to some embodiments of the present application, as shown in Figure 1 and Figure 2 In the scraping direction of the scraping strip 20, the front end edge of the baffle 30 has a convex arc surface 32, and the convex arc surface 32 is connected with the fitting surface 31.

[0044] The front end of the baffle 30 refers to an end away from the scraping strip 20 in the scraping direction, for example, the front end shown in Figure 1 The convex arc surface 32 refers to an arc surface protruding away from the scraping strip 20. Thus, in the printing process, the convex arc surface 32 of the baffle 30 is not easy to rub against the screen 200, and the service life of the screen 200 is improved.

[0045] In some embodiments of the present application, as shown in Figure 1 The printing machine head 10 has a mounting inclined surface 11, the angle between the mounting inclined surface 11 and the screen 200 is α, the scraping strip 20 is mounted on the mounting inclined surface 11, the angle between the fitting surface 31 and the mounting inclined surface 11 is β, and α is equal to β.

[0046] Thus, during the assembling process, the angle of the fitting surface 31 can be adjusted by controlling the angle of the printing head 10, so that the angle of the fitting surface 31 is controlled more easily and accurately, for example, the fitting surface 31 is more easily attached to the screen 200. For example, as shown in Figure 1 the printing head 10 has a positioning surface opposite to the installation slope 11, and the angle between the positioning surface and the installation slope 11 is γ, the sum of γ and β is 90°, and the screen 200 is horizontally installed on the printing machine. Thus, by adjusting the positioning surface to be a vertical surface, the fitting surface 31 can be horizontally extended and attached to the screen 200.

[0047] In some embodiments, referring to Figures 1-3 the squeegee 100 further comprises a squeegee plate 40. The squeegee plate 40 is installed on the installation slope 11, and the squeegee strip 20 is installed on the side of the squeegee plate 40 away from the installation slope 11. In other words, the squeegee plate 40 connects the printing head 10 and the squeegee strip 20, so that the connection strength between the squeegee strip 20 and the printing head 10 is improved, and the position adjustment of the printing head 10 and the squeegee strip 20 is more flexible. For example, the squeegee plate 40 can be made of metal or hard non-metal material, and the squeegee strip 20 can be made of rubber or other material with certain flexibility. The hardness of the squeegee plate 40 is greater than that of the squeegee strip 20, so that the fixing reliability of the squeegee strip 20 is improved.

[0048] By providing the squeegee plate 40, the printing head 10 and the squeegee plate 40 are more easily spaced apart from the screen 200. For example, the distance between the squeegee plate 40 and the screen 200 is greater than the distance between the fitting surface 31 and the screen 200. Thus, during the printing process, the printing head 10 and the squeegee plate 40 do not contact the screen 200, so that the screen 200 is not easily worn, and the service life of the screen 200 is improved.

[0049] In the embodiments of the present application, the specific structure of the scraping area 21 can be flexibly set according to actual conditions. For example, in some embodiments, as shown in Figure 1 and Figure 2 the scraping area 21 is the edge 22 of the squeegee strip 20, the squeegee strip 20 has a first surface 23 and a second surface 24 located on both sides of the edge 22, the barrier 30 is arranged on the first surface 23, and the angle between the second surface 24 and the fitting surface 31 is less than 180°.

[0050] The edge 22 is the intersection of the first surface 23 and the second surface 24. The angle between the second surface 24 and the fitting surface 31 is less than 180°, so that when the fitting surface 31 is in contact with the surface of the screen 200, the second surface 24 can be spaced apart from the surface of the screen 200. Only the edge 22 is used to scrape the paste on the screen 200, so that the wear of the screen 200 is reduced, the service life of the screen 200 is improved, and the paste scraping is more uniform.

[0051] In addition, the barrier 30 is arranged on the first surface 23, as shown in Figure 1The front side shown enables the baffle 30 and the pre-coated paste to be located on the same side of the squeegee 20, and the baffle 30 can be located on both sides of the pre-coated paste perpendicular to the squeegee direction in a larger area, thereby improving the blocking effect of the baffle 30 on the paste.

[0052] According to some embodiments of the present application, the squeegee 20 and the baffle 30 are made of the same material, which makes the squeegee 20 and the baffle 30 easier to connect and more firmly connected, and the baffle 30 is not easy to fall off during the printing process.

[0053] For example, in some embodiments, the squeegee 20 and the baffle 30 are made of rubber material. The rubber material not only makes the connection of the squeegee 20 and the baffle 30 reliable, but also has a certain flexibility, so that the squeegee 20 and the baffle 30 are not easy to hard contact with the screen 200, reducing the wear of the screen 200, thereby improving the service life of the screen 200.

[0054] In some embodiments, the squeegee 20 and the baffle 30 can be integrally formed, the connection between the baffle 30 and the squeegee 20 is more reliable, and a gap is not easy to form between the baffle 30 and the squeegee 20, reducing the risk of paste entering the gap. In the embodiments in which the squeegee 20 and the baffle 30 are made of rubber material, the squeegee 20 and the baffle 30 can be integrally injection molded, which is beneficial to improve the production efficiency.

[0055] According to some embodiments of the present application, the printing head 10 is provided with a baffle ear at each end (such as the left end and the right end) perpendicular to the squeegee direction, and the distance between the baffle ear and the screen 200 is less than the distance between the printing head 10 and the screen 200. The two baffle ears are located on the sides away from each other of the two baffles 30, that is, the left end baffle ear is located on the left side of the left end baffle 30, and the right end baffle ear is located on the right side of the right end baffle 30.

[0056] Therefore, the baffle ear and the baffle 30 can form a double-layer barrier, which is more conducive to improving the problem of paste flowing to both sides of the screen 200, reducing the formation of dry paste, reducing the stress inside the screen 200, and improving the service life of the screen 200.

[0057] In addition, the distance between the baffle ear and the screen 200 is greater than the distance between the fitting surface 31 and the screen 200, so that the baffle ear can block the paste side flow without easily interfering with or wearing the screen 200, which is more conducive to improving the service life of the screen 200. Moreover, the material selection of the baffle ear is more flexible, for example, the baffle ear can be made of metal material, which makes the connection of the baffle ear and the printing head 10 more reliable, and the baffle ear can have good shielding and protection effect on the baffle 30.

[0058] The printing machine according to the embodiment of the utility model, including the doctor blade 100 according to the printing machine of the utility model embodiment. Since the doctor blade 100 according to the embodiment of the utility model has the beneficial technical effects described above, the printing machine according to the embodiment of the utility model can effectively improve the phenomenon that the slurry flows to both sides of the screen plate 200, and a large amount of dry slurry is not prone to occurring, thereby improving the utilization rate of the slurry, and improving the printing life and printing quality of the screen plate 200.

[0059] The doctor blade 100 of the printing machine according to one specific embodiment of the utility model will be described in detail below with reference to the accompanying drawings, and it should be understood that the following description is only exemplary and cannot be understood as limiting the utility model.

[0060] As shown in the drawing, Figures 1-3 The doctor blade 100 of the printing machine according to one specific embodiment of the utility model includes a printing head 10, a doctor bar 20, a doctor plate 40, and two barriers 30.

[0061] The printing head 10 serves as a doctor blade holder and has a mounting inclined surface 11 extending obliquely relative to the surface of the screen plate 200, and the doctor plate 40 is mounted on the mounting inclined surface 11. The doctor bar 20 is mounted on the side of the doctor plate 40 away from the mounting inclined surface 11, so that the first surface 23 and the second surface 24 of the doctor bar 20 each form a certain angle with the surface of the screen plate 200, and the edge 22 where the first surface 23 and the second surface 24 intersect is used to apply the slurry on the screen plate 200. The barriers 30 are mounted on the first surface 23 of the doctor bar 20 away from the doctor plate 40, and the two barriers 30 are arranged spaced apart along the length direction of the doctor bar 20, so that the two barriers 30 can be located on both sides of the printing area on the screen plate 200 to block the slurry in the printing area. The surface of the barrier 30 facing the screen plate 200 is a matching surface 31, and the matching surface 31 is in close contact with the surface of the screen plate 200. The printing head 10 has a blocking lug on each side in the length direction, and the two blocking lugs are located on the opposite sides of the two barriers 30, so that the blocking lugs and the barriers 30 form a double-layer barrier.

[0062] In the above embodiment, the doctor blade 100 can effectively improve the flow of the slurry to both sides of the screen plate 200, thereby reducing the accumulation of the slurry on both sides of the screen plate 200, reducing the formation of dry slurry, reducing the stress inside the screen plate 200, improving the life of the screen plate 200, and improving the utilization rate of the slurry and the printing quality.

[0063] Other configurations and operations of the printing machine according to the embodiment of the utility model are known to those skilled in the art, and will not be described in detail here.

[0064] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through intermediate medium indirectly connected, can be two elements inside the communication.For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0065] In the description of the present specification, the description of the terms "embodiment", "specific embodiment", "example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0066] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A doctor blade for a printing press, characterized in that, The printing machine head comprises: a printing machine head; a doctor bar, which is arranged on the printing machine head and is movable under the driving of the printing machine head, and has a doctoring area for doctoring the size on the screen plate; a baffle, which is arranged at the two ends of the doctor bar perpendicular to the doctoring direction, and has a matching surface coplanar with the doctoring area.

2. The doctor blade of a printing press according to claim 1, characterized in that In the doctoring direction of the doctor bar, the front end edge of the baffle has a convex arc surface connected with the matching surface.

3. The doctor blade of a printing press according to claim 1, characterized in that, The printing machine head has a mounting slope, the angle between the mounting slope and the screen plate is α, the doctor bar is mounted on the mounting slope, the angle between the matching surface and the mounting slope is β, and α is equal to β.

4. The doctor blade of a printing press according to claim 3, characterized in that The printing machine head further comprises a doctor plate, which is mounted on the mounting slope, the doctor bar is mounted on the side of the doctor plate away from the mounting slope, and the distance between the doctor plate and the screen plate is greater than the distance between the matching surface and the screen plate.

5. The doctor blade of a printing press according to claim 1, wherein The doctoring area is the edge of the doctor bar, the doctor bar has a first surface and a second surface on the two sides of the edge, the baffle is arranged on the first surface, and the angle between the second surface and the matching surface is less than 180°.

6. The doctor blade of a printing press according to claim 1, wherein The doctor bar and the baffle are made of the same material.

7. The doctor blade of a printing press according to claim 6, characterized in that The doctor bar and the baffle are made of rubber.

8. The doctor blade of a printing press according to claim 1, wherein The doctor bar and the baffle are integrally formed.

9. The doctor blade of a printing press according to claim 1, wherein The printing machine head has a blocking lug at each end perpendicular to the doctoring direction, the two blocking lugs are located on the sides of the two baffles away from each other, the distance between the blocking lug and the screen plate is less than the distance between the printing machine head and the screen plate, and the distance between the blocking lug and the screen plate is greater than the distance between the matching surface and the screen plate.

10. A printing press characterized by The printing machine comprises a doctor blade according to any one of claims 1-9.

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