Printing scraper, printing scraper and printing equipment

Abstract

The utility model relates to the technical field of silk-screen printing equipment, and discloses a printing scraper blade, a printing scraper and printing equipment, the printing scraper blade comprises a scraper blade main body, and the shore hardness of the scraper blade main body is 55-80 degrees; the medium channel is arranged in the scraper blade main body, the medium channel is used for storing or passing a medium, and the scraper blade main body is used for deforming under the action of the medium. According to the printing scraping plate, the purpose that the printing effect can be adjusted without replacing the printing scraping plate can be achieved, the printing scraping plate can have the stable printing effect in different use periods, and then the service life of the printing scraping plate is prolonged.

Description

Technical Field

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

[0002] Screen printing is an important process in the preparation of solar cells. The process of screen printing is usually: use a straight scraper, tilt it to the printing screen, move the straight scraper, so that the printing paste on the printing screen passes through the printing screen under the push of the printing scraper and its edges, thereby forming a high-precision circuit or electrode on the silicon wafer.

[0003] Since the screen printing process utilizes the scraper and its edges in the above-mentioned straight scraper to scrape the printing slurry on the printing screen, the straight scraper will wear out during repeated use, resulting in the hardness of the edge and the angle between the scraper and the printing screen changing with the use time of the straight scraper, which in turn causes the printing effect to be unstable and difficult to adjust. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a printing scraper, a printing scraper and a printing device, so as to achieve the purpose of adjusting the printing effect without replacing the printing scraper, so that the printing scraper can have a stable printing effect in different periods of use, thereby extending the service life of the printing scraper.

[0005] To achieve the above objectives, the present application provides the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a printing squeegee, the printing squeegee comprising:

[0007] A scraper body, wherein the scraper body has a Shore hardness of 55 to 80 degrees;

[0008] A medium channel is provided in the scraper body, the medium channel is used to store or allow the medium to pass through, and the scraper body is used to deform under the action of the medium.

[0009] Furthermore, the scraper body is a plastic scraper body.

[0010] Furthermore, the scraper body includes one of a polyethylene scraper body, a polyvinyl chloride scraper body, and a polyurethane scraper body.

[0011] Furthermore, the medium includes one or more of air, compressed gas, and water.

[0012] As a preferred embodiment, the scraper body includes a flat plate portion and curved portions provided at two ends of the flat plate portion, and the curved portions are curved toward one side surface of the flat plate portion.

[0013] Furthermore, the scraper body has edges for contacting printing paste; the cross-sectional shape of the scraper body along a direction perpendicular to its own length is a polygon, and the polygon has an angle corresponding to the edges, and the angle is less than or equal to 90 degrees.

[0014] Furthermore, at least part of the medium channel is arranged at the angle along the direction of the edge.

[0015] In a second aspect, an embodiment of the present application provides a printing scraper, wherein the printing scraper includes the printing scraper plate as described in the first aspect.

[0016] Furthermore, the printing scraper also includes a scraper handle connected to the printing scraper, and the scraper body has a side edge for contacting the printing paste;

[0017] The medium channel comprises:

[0018] A first channel, the first channel is arranged along the direction of the edge and close to the edge;

[0019] A second channel, the second channel is extended from the scraper body toward the scraper handle, one end of the second channel is connected to one end of the first channel, the other end of the second channel extends out of the surface of the scraper handle, and the second channel is a medium inlet;

[0020] The third channel is extended from the scraper body toward the scraper handle, one end of the third channel is connected to the other end of the first channel, the other end of the third channel extends out of the surface of the scraper handle, and the third channel is a medium outlet.

[0021] In a third aspect, an embodiment of the present application provides a printing device, which includes a printing scraper as described in the first aspect or a printing scraper as described in the second aspect.

[0022] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0023] The printing scraper of the embodiment of the present application is provided with a medium channel in the scraper body with a Shore hardness of 55 to 80 degrees. The scraper body at this hardness has both certain structural support performance and deformability. When the medium is introduced into the medium channel, the scraper body can be deformed. During the printing process, the edge of the printing scraper is mainly used to squeeze the slurry in the printing screen. At different stages of the use of the scraper, the hardness of the edge and the angle corresponding to the edge in contact with the printing slurry are different, and then the angle between the printing scraper and the printing screen is also different. Through this deformation, the hardness and angle of the edge can be adjusted without replacing the scraper, thereby controlling the printing effect and extending the service life of the printing scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a schematic diagram of the screen printing process (early stage of using the printing scraper);

[0026] Figure 2 It is a schematic diagram of the screen printing process (later stage of squeegee use);

[0027] Figure 3 It is a schematic diagram of the structure of the printing scraper provided in the embodiment of the present application;

[0028] Figure 4 is a side view of a printing scraper provided in an embodiment of the present application;

[0029] Figure 5 yes Figure 4 Schematic diagram of deformation of a printing scraper passing through a medium;

[0030] Figure 6 yes Figure 4 Schematic diagram of deformation of the printing scraper passing into another medium;

[0031] Figure 7 is a top view of a printing scraper provided in an embodiment of the present application;

[0032] Figure 8 It is a side view of several printing scrapers provided in the embodiments of the present application (medium channel omitted);

[0033] Fig. 9 It is a side view of several printing scrapers provided in the embodiments of the present application;

[0034] Fig.10 is a front view of a printing scraper provided in an embodiment of the present application;

[0035] Fig.11 It is a schematic diagram of the distribution of medium channels in a printing scraper provided in an embodiment of the present application.

[0036] Reference numerals:

[0037] 1. Printing scraper; 11. Printing scraper; 111. Scraper body; 1111. Edge; 112. Medium channel; 1121. First channel; 1122. Second channel; 1123. Third channel; 113. Flat plate; 114. Bending part; 12. Scraper handle; 13. Connecting plate. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0040] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0041] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0043] The technical solution provided in this application will be further described below in conjunction with embodiments and drawings.

[0044] like Figure 1 , Figure 2 As shown, during the screen printing process, the printing scraper 11 and the printing screen 2 are at a fixed angle, and the edges of the printing scraper 11 squeeze the slurry in the printing screen to print. Since the printing scraper is repeatedly used during the above-mentioned screen printing process, the edges of the printing scraper will be worn out during the printing process, resulting in changes in the hardness of the edges and the angles corresponding to the edges in the early and late stages of use. Figure 1 In the screen printing process shown, the printing scraper is in the early stage of use. The edges of the newly used printing scraper are very sharp and have a high hardness, so the slurry penetration rate will be slightly lower. During repeated use, the hardness of the printing scraper 11 will slowly decrease, and the edges of the printing scraper 11 will become more and more blunt (such as Figure 2 As shown in FIG. 1 , the angle between the printing scraper 11 and the printing screen 2 becomes smaller, and the slurry is more easily filled into the mesh of the printing screen, resulting in a higher penetration of the slurry, which in turn affects the printing effect. Replacing the printing scraper is not only time-consuming, but also costly.

[0045] In response to the above problems, the embodiments of the present application provide a printing scraper, a printing scraper and a printing device. By improving the printing scraper, the hardness and angle of the edge can be easily adjusted. There is no need to replace the printing scraper, and a relatively stable printing effect can be guaranteed.

[0046] Since the printing scraper according to the embodiment of the present application is applied to a printing scraper, when introducing the printing scraper according to the embodiment of the present application below, the printing scraper will be placed in the printing scraper for illustration.

[0047] The first aspect, such as Figure 3 As shown, the embodiment of the present application provides a printing scraper 1, which includes a printing scraper plate 11. The printing scraper plate 11 includes a scraper plate body 111 with a Shore hardness of 55 to 80 degrees and a medium channel 112 provided in the scraper plate body, and the medium stored or passed through the medium channel 112 can cause the scraper plate body 111 to deform.

[0048] On the one hand, the scraper body 111 of this hardness has certain structural support performance and will not be deformed due to extrusion with the printing paste during printing; on the other hand, under certain external effects, the scraper body 111 of this hardness can be deformed, which is convenient for controlling the printing effect by adjusting the shape of the scraper body 111. The medium channel 112 can be used to store or pass various media that do not react with the scraper body 111. By adjusting the position of the medium channel 112, the pressure and temperature of the medium, the deformation effect of the scraper body 111 can be adjusted. When the medium channel 112 located inside the scraper body 111 is deformed under the action of the medium, this deformation will be transmitted to the scraper body 111, and then the edge 1111 will also be deformed. The edge 1111 is in direct contact with the printing paste, and the change of the edge 1111 will directly affect the printing effect. It can be understood that in the embodiment of the present application, the edge 1111 refers to the edge of the scraper body 111 used to squeeze the printing paste and push the printing paste through the printing screen. Although the edge 1111 is easily worn out due to repeated use during the screen printing process, making the originally sharp edge gradually blunt, thereby affecting the squeezing and penetration effect of the edge 1111 on the printing paste, in the embodiment of the present application, under the action of the medium, the scraper body 111 is deformed, and the hardness and angle of the edge 1111 can be adjusted through this deformation to reduce or offset the impact caused by the wear of the edge 1111. In some usage scenarios, the printing scraper 11 with relatively sharp edges in the early stage may not be suitable. Through the setting of the medium channel 112 in the embodiment of the present application, the edge 1111 can also be adjusted accordingly to meet the actual production needs.

[0049] Further, the scraper body 111 is a plastic scraper body, including one of a polyethylene scraper body, a polyvinyl chloride scraper body, and a polyurethane scraper body. The medium includes one or more of air, compressed gas, and water.

[0050] The material of the scraper body 111 needs to have certain deformability and heat conductivity while meeting the hardness requirements. When the medium is stored in or passes through the medium channel 112, the pressure changes and temperature changes of the medium can be transmitted to the scraper body 111, thereby causing the scraper body 111 to deform.

[0051] The medium includes air, compressed gas, water, etc. Different media can be used in different use stages of the printing scraper 11 according to specific use requirements. Figure 4 The side view of a printing scraper 1 having a medium channel 112 disposed in a scraper body 111, wherein the medium channel 112 is disposed along the contour of the printing scraper 11. As an embodiment, negative pressure is introduced through the medium channel 112. Figure 4 The middle scraper body 111 can produce Figure 5As another embodiment, water or air at a certain pressure is stored or passed through the medium channel 112, Figure 4 The middle scraper body 111 can produce Figure 6 The deformation shown. It can be seen that compared with Figure 4 , Figure 5 The corresponding angle (angle a) of the middle edge becomes smaller. Figure 6 The corresponding angle (angle b) of the middle edge becomes larger. It can be understood that as the scraper body 111 deforms, its hardness will inevitably change accordingly, that is, the hardness of the edge and its corresponding angle can be adjusted by storing or passing the medium in the medium channel 112. Further, as another embodiment, Figure 4 The medium stored or passing through the middle medium channel 112 is water. By adjusting the temperature of the water, the temperature of the printing scraper 11, the printing paste in contact with the printing scraper 11, and even the entire printing area are adjusted, thereby adjusting the printing effect. For example, if the temperature of the printing paste is too high or the printing paste heats up too quickly, the printing paste will dry out and clog the printing screen. Passing in water with a lower temperature can largely avoid or alleviate this situation; and if the viscosity of the printing paste is low due to the low temperature, making printing difficult, etc., higher temperature water can also be passed in to increase the viscosity of the printing paste. Keeping the temperature of the printing paste and the printing area stable, the printing effect is also easier to control, achieving better plasticity of the printing paste printing pattern.

[0052] Furthermore, the scraper body 111 includes a flat plate portion 113 and curved portions 114 disposed at both ends of the flat plate portion, and the curved portions 114 are curved toward one side of the flat plate portion 113. Figure 7 On the one hand, such a setting can increase the contact strength between the printing scraper 11 and the printing paste at the position corresponding to the edge of the printing screen pattern during printing, thereby preventing the edge of the printed pattern from leaking; on the other hand, during printing, the curved portions 114 at both ends of the flat portion 113 are bent toward the printing direction of the flat portion 113, thereby allowing the printing paste to gradually move toward the center position during the movement of the scraper, thereby reducing the situation where the paste overflows outside the printing area and causes dry paste.

[0053] Furthermore, if Figure 3 , Figure 8 As shown, the cross-sectional shape of the scraper body 111 along the direction perpendicular to its length is a polygon. Specifically, the cross-sectional shape of the scraper body 111 along the direction perpendicular to the edge 1111 is a polygon. The polygon has an angle corresponding to the edge 1111, and the angle is less than or equal to 90 degrees. For example, Figure 8 The side views of several printing scrapers provided in this embodiment are shown in FIG. Figure 8 In (a), the cross-sectional shape of the scraper body 111 is rectangular, and the angle (angle c) corresponding to the edge contacting the printing paste is a right angle, and Figure 8(b) Figure 8 (c) Figure 8 The angles (angle d, angle e, angle f) corresponding to the edges contacting the printing paste in (d) are acute angles. By adjusting the shape of the scraper body 111, the angles corresponding to the edges 1111 can be adjusted, and then the angle of the printing scraper 11 relative to the printing screen 2 can be adjusted to meet different printing needs.

[0054] Furthermore, if Fig. 9 As shown, according to the shape of the printing squeegee 11 and actual production, a medium channel 112 with different cross-sectional shapes can be provided along the length direction of the printing squeegee 11. As a preferred embodiment, at least part of the medium channel 112 is provided along the direction of the edge 1111 at the angle corresponding to the edge 1111, that is, at least part of the medium channel 112 is provided close to the edge 1111 in contact with the printing paste, and this arrangement can maximize the effect of the medium on the edge 1111, and the printing effect can be controlled by controlling the relative position of the medium channel 112 and the edge 1111. For example, at a position corresponding to the angle of the edge 1111, a medium channel 112 parallel to the edge is set along the direction of the edge 1111, so as to facilitate the overall uniform control of the edge 1111 and further achieve overall uniform control of the printing effect; for another example, the medium channel 112 is set along the direction of the edge 1111, the middle part of the medium channel is closer to the edge 1111, and the two end parts are farther from the edge 1111, then when storing or passing the medium, different positions of the edge 1111 are deformed differently, thereby achieving different control of different printing areas corresponding to different positions of the edge 1111 to meet different printing needs.

[0055] Furthermore, the printing scraper also includes a scraper handle 12 connected to the printing scraper 11, and the scraper body 111 has a ridge 1111 for contacting the printing paste. As an optional embodiment, Fig.10 The figure shows a front view of a printing scraper 1 provided in an embodiment of the present application, which includes a printing scraper 11 , a scraper handle 12 and a connecting plate 13 , wherein the connecting plate 13 is used to connect the printing scraper 11 and the scraper handle 12 .

[0056] like Fig.11 As shown, in the printing scraper 1, the medium channel 112 includes:

[0057] The first channel 1121 is arranged along the direction of the edge 1111 and close to the edge 1111;

[0058] The second channel 1122 is extended from the scraper body 111 toward the scraper handle. One end of the second channel is connected to one end of the first channel, and the other end of the second channel extends out of the surface of the scraper handle 12. The second channel 1122 is a medium inlet.

[0059] The third channel 1123 is extended from the scraper body 111 toward the scraper handle 12 . One end of the third channel is connected to the other end of the first channel . The other end of the third channel extends out of the surface of the scraper handle 12 . The third channel 1123 is a medium outlet.

[0060] In a third aspect, an embodiment of the present application provides a printing device (not shown), including the printing scraper 11 in the first aspect or the printing scraper 1 in the second aspect.

[0061] The above is a detailed introduction to a printing scraper, a printing scraper and a printing device disclosed in the embodiment of the present application. The principle and implementation method of the present application are described in detail using specific examples. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the embodiment of the present application. At the same time, for those of ordinary skill in the art, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A printing scraper, characterized in that: The printing scraper comprises: A scraper body, wherein the scraper body has a Shore hardness of 55 to 80 degrees; A medium channel is provided in the scraper body, the medium channel is used to store or allow the medium to pass through, and the scraper body is used to deform under the action of the medium.

2. The printing squeegee according to claim 1, characterized in that The scraper body is a plastic scraper body.

3. The printing squeegee according to claim 2, characterized in that The scraper body includes one of a polyethylene scraper body, a polyvinyl chloride scraper body, and a polyurethane scraper body.

4. The printing squeegee according to claim 1, characterized in that The medium includes one or more of air, compressed gas, and water.

5. The printing squeegee according to claim 1, characterized in that The scraper body includes a flat plate portion and curved portions arranged at two ends of the flat plate portion, and the curved portions are curved toward one side surface of the flat plate portion.

6. The printing squeegee according to claim 1, characterized in that The scraper body has a side edge for contacting the printing paste; The cross-sectional shape of the scraper body along a direction perpendicular to its length is a polygon, and the polygon has an angle corresponding to the edge, and the angle is less than or equal to 90 degrees.

7. The printing squeegee according to claim 6, characterized in that At least part of the medium channel is arranged at the angle along the direction of the edge.

8. A printing scraper, characterized in that: The printing scraper comprises the printing scraper plate according to any one of claims 1-7.

9. The printing scraper according to claim 8, characterized in that The printing scraper also includes a scraper handle connected to the printing scraper, and the scraper body has a side edge for contacting the printing paste; The medium channel comprises: A first channel, the first channel is arranged along the direction of the edge and close to the edge; A second channel, the second channel is extended from the scraper body toward the scraper handle, one end of the second channel is connected to one end of the first channel, the other end of the second channel extends out of the surface of the scraper handle, and the second channel is a medium inlet; The third channel is extended from the scraper body toward the scraper handle, one end of the third channel is connected to the other end of the first channel, the other end of the third channel extends out of the surface of the scraper handle, and the third channel is a medium outlet.

10. A printing device, characterized in that: The printing device comprises a printing squeegee as claimed in any one of claims 1 to 7 or a printing blade as claimed in any one of claims 8 to 9.

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