Screen printing mechanism and photovoltaic module processing system

Abstract

The utility model relates to a screen printing mechanism and a photovoltaic module processing system. The screen printing mechanism comprises a printing platform, a screen assembly and a positioning assembly. The screen assembly is arranged opposite to the printing platform and comprises a screen support and a screen movably arranged on the screen support. The positioning assembly comprises a height limiting piece and a floating piece, the height limiting piece is arranged on the side, facing the screen printing plate, of the printing platform in a protruding mode and / or the side, facing the printing platform, of the screen printing plate, and the screen printing plate support can drive the screen printing plate to move so that the screen printing plate and / or the printing platform can abut against the height limiting piece. The floating piece is arranged on the screen support and connected with the screen, and when the screen and / or a part of the printing platform abut against the height limiting piece, the floating piece enables the screen to twist so as to adjust the levelness of the screen. According to the screen printing mechanism, the screen can be horizontally arranged at the preset height relative to the printing platform through the positioning assembly, and the position of the screen does not need to be frequently debugged when a photovoltaic module is machined and the position of the screen does not need to be debugged when different screens are switched.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solar cell, in particular to a screen printing mechanism and a photovoltaic module processing system. BACKGROUND

[0002] In the process of photovoltaic module, the solder strip is usually printed on the cell by using glue to realize the series connection of multiple cells. Specifically, the cell is first conveyed to the printing platform, then the glue is applied on the cell by using the printing screen, and the solder strip is solidified on the cell by using UV light to irradiate the glue, and then laminated to realize the alloying of the solder strip and the cell.

[0003] However, during the processing, the position of the printing screen needs to be frequently adjusted due to the insufficient stability of the glue printing. In addition, when different printing screens are switched, the distance between the printing screen and the printing platform changes, and the position of the printing screen needs to be re-adjusted, which takes a long time and affects the overall productivity. UTILITY MODEL CONTENT

[0004] Therefore, it is necessary to provide a screen printing mechanism and a photovoltaic module processing system to solve the above technical problems.

[0005] A screen printing mechanism comprises:

[0006] a printing platform;

[0007] a screen assembly, which is arranged opposite to the printing platform and comprises a screen support and a screen movably arranged on the screen support; and

[0008] a positioning assembly, which comprises a height limiting piece and a floating piece, the height limiting piece is protruded from a side of the printing platform facing the screen and / or a side of the screen facing the printing platform, the screen support can drive the screen to move so that the screen and / or the printing platform abuts against the height limiting piece, the floating piece is arranged on the screen support and connected with the screen, and when a part of the screen and / or the printing platform abuts against the height limiting piece, the screen is twisted to adjust the levelness of the screen.

[0009] In one of the embodiments, the side of the printing platform facing the screen has a printing area, the height limiting piece is provided with a plurality of height limiting pieces, the plurality of height limiting pieces are arranged at the outer circumferential side of the printing area, and the surfaces of the plurality of height limiting pieces away from the printing platform are located at the same horizontal plane.

[0010] In one of the embodiments, the floating piece is provided with two floating pieces, and the two floating pieces are symmetrically arranged on the opposite sides of the screen.

[0011] In one of the embodiments, the floating member comprises a power cylinder having a housing and a needle telescopically arranged on the housing, the housing is connected with the screen frame, and the needle is connected with the screen.

[0012] In one of the embodiments, the side of the screen opposite to the printing platform is provided with a mounting hole, and the needle is embedded in the mounting hole.

[0013] In one of the embodiments, the side of the screen facing the printing platform and / or the side of the printing platform facing the screen frame is provided with a wear-resistant part capable of abutting against the height-limiting member.

[0014] In one of the embodiments, the wear-resistant part comprises a metal gasket.

[0015] In one of the embodiments, the screen frame comprises a frame and a mounting rack arranged on the side of the frame facing the printing platform, and the screen is arranged on the side of the frame facing the printing platform and overlapped on the mounting rack, wherein the screen and the frame have a movable gap therebetween.

[0016] In one of the embodiments, the screen printing mechanism further comprises a driving assembly connected with the screen frame and capable of driving the screen frame to move away from or close to the printing platform.

[0017] A photovoltaic module processing system comprising the screen printing mechanism according to any one of the above.

[0018] The screen printing mechanism and the photovoltaic module processing system described above, by arranging the positioning assembly between the printing platform and the screen assembly, the height-limiting member of the positioning assembly and the floating member can cooperate to horizontally arrange the screen at a preset height relative to the printing platform, so as to keep the distance between the screen and the printing platform constant, thus avoiding frequent adjustment of the position of the screen during processing of the photovoltaic module and during switching of different screens, and ensuring that the height and shape of the glue point after each printing are the same, thereby ensuring the uniformity and stability of the printing, and improving the processing efficiency of the photovoltaic module and the utilization rate. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The structure schematic view of the screen printing mechanism provided by one of the embodiments of the present application during printing.

[0020] Figure 2 The structure schematic view of the screen printing mechanism provided by one of the embodiments of the present application during printing. Figure 1 The structure schematic view of the printing platform of the screen printing mechanism from the front.

[0021] Figure 3 The structure schematic view of the screen printing mechanism provided by one of the embodiments of the present application during printing. Figure 1A structure diagram of a screen printing mechanism provided by the application is shown in the figure.

[0022] Figure 4 For Figure 1 A structure diagram of a screen printing mechanism provided by the application is shown in the figure.

[0023] In the figure, the following signs are explained:

[0024] 10, screen printing mechanism; 100, printing platform; 100a, printing area; 200, screen assembly; 210, screen; 210a, mounting hole; 211, frame part; 212, pattern part; 220, screen support; 221, frame; 221a, operation window; 222, mounting bracket; 2221, first horizontal mounting plate; 2222, vertical mounting plate; 2223, second horizontal mounting plate; 223, fixing strip; 300, positioning assembly; 310, height limiting piece; 320, floating piece; 321, shell; 322, thimble; 400, wear-resistant part. DETAILED DESCRIPTION

[0025] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that if these 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 appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0027] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0028] In the present application, unless specifically defined otherwise and limited, if there are terms such as "mount", "connect", "connect", "fix", etc., these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In the present application, unless specifically defined otherwise and limited, if there are similar descriptions such as "first feature on" or "second feature", the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0030] It should be noted that if an element is referred to as "fixed to" or "provided to" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If there is, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes, not the only embodiment.

[0031] As the core part of the solar power generation system, the photovoltaic module is usually composed of multiple cell strings, wherein each cell string includes multiple cell pieces connected in series. In the processing of the photovoltaic module, the solder strip is usually printed on the cell piece by using the glue printing method to realize the series connection of multiple cell pieces. Specifically, the cell piece is first conveyed to the printing platform, then the glue is applied to the cell piece by using the printing screen, the whole solder strip is cured on the cell piece by using UV light to irradiate the glue, and then laminated to realize the alloying of the solder strip and the cell piece.

[0032] However, during processing, due to the insufficient stability of the glue printing, the position of the printing screen needs to be frequently adjusted; when switching between different printing screens, the distance between the printing screen and the printing platform will change, and the position of the printing screen needs to be re-adjusted, which takes a long time and affects the overall productivity.

[0033] To this end, in one aspect, an embodiment of the present application provides a screen printing mechanism, which can be applied in the field of photovoltaic module processing and can apply glue to the cell sheet so that the solder strip can connect multiple cell sheets into a string by means of glue printing.

[0034] As shown in Figure 1 , the screen printing mechanism 10 comprises a printing platform 100, a screen assembly 200 and a positioning assembly 300. As shown in Figure 2 , one side of the printing platform 100 facing the screen 210 has a printing area 100a, and the cell sheet is transported to the printing area 100a of the printing platform 100 before glue printing. It should be noted that Figure 2 , the area circled by the dashed line represents the printing area 100a of the printing platform 100. The shape and size of the printing area 100a can be set according to the cell sheet to be printed with glue, as long as it does not affect the normal glue printing of the cell sheet. For example, as shown in Figure 2 , the printing area 100a is a rectangular area, and of course it can also be set as a circular area or other regular or irregular shaped area according to requirements.

[0035] The screen assembly 200 is the main body of glue printing and is arranged opposite to the printing platform 100, as shown in Figure 1 , comprising a screen support 220 and a screen 210, the screen 210 is movably arranged on the screen support 220, and the screen support 220 can drive the screen 210 to move. When the cell sheet to be printed is transported to the printing area 100a of the printing platform 100, the screen support 220 drives the screen 210 to move towards the printing platform 100. When the screen 210 moves to the preset position above the printing platform 100, the screen 210 applies glue to the cell sheet on the printing platform 100, and after the printing is completed, the screen support 220 drives the screen 210 to move upwards so that the screen 210 is separated from the printing platform 100.

[0036] In one embodiment, as shown in Figure 1 , the screen support 220 comprises a frame 221 and a mounting bracket 222, the mounting bracket 222 is arranged on the side of the frame 221 facing the printing platform 100, and the screen 210 is located on the side of the frame 221 facing the printing platform 100 and overlaps the mounting bracket 222, wherein the screen 210 and the frame 221 have a movable gap therebetween. The screen 210 is limited between the mounting bracket 222 and the frame 221, so that the screen support 220 can drive the screen 210 to move synchronously when moving towards the printing platform 100; in addition, the movable gap is added between the screen 210 and the frame 221, which facilitates the adjustment of the levelness of the screen 210.

[0037] Among them, as shown in Figure 1As shown, the frame 221 has an operation window 221a for exposing the pattern portion 212 of the screen 210, wherein, as shown in Figure 3 and Figure 4 As shown, the screen 210 has a pattern portion 212 and a frame portion 211 arranged at the outer circumferential side of the pattern portion 212, and the frame portion 211 is lapped on the mounting rack 222. The shape and size of the operation window 221a can be set according to the pattern portion 212 of the screen 210, and exemplarily, as shown in Figure 2 and Figure 3 If the pattern portion 212 of the screen 210 is square, the operation window 221a is also correspondingly set as a square window, and the sizes of the two are substantially the same; and again exemplarily, if the pattern portion 212 of the screen 210 is circular, the operation window 221a is also correspondingly set as a square window, and the sizes of the two are substantially the same.

[0038] Optionally, as shown in Figure 1 The mounting rack 222 is generally in the shape of "U", and can include a first horizontal mounting plate 2221, a vertical mounting plate 2222 and a second horizontal mounting plate 2223 connected in sequence and vertically, the first horizontal mounting plate 2221 abuts against the side of the frame 221 facing the printing platform 100, and the second horizontal mounting plate 2223 is for lapping the screen 210. It should be noted that the thickness of the first horizontal mounting plate 2221 is very thin, and does not affect the adjustment of the horizontal degree of the screen 210. Of course, in some other embodiments, the mounting rack 222 is generally in the shape of "L" or other shapes.

[0039] Optionally, as shown in Figure 1 The screen support 220 further includes a fixing strip 223 arranged at the side of the frame 221 facing the printing platform 100 and connected with the vertical mounting plate 2222 of the mounting rack 222. The fixing strip 223 can be connected with the frame 221 and the vertical mounting plate 2222 of the mounting rack 222 by welding, screwing, clamping or the like.

[0040] As for the number of the mounting racks 222, it can be at least two, for example, two, three or four, and when it is two, the two mounting racks 222 are arranged at the opposite sides of the frame 221.

[0041] In an embodiment, the screen printing mechanism 10 further includes a driving assembly (not shown in the drawings), which is connected with the screen support 220 and can drive the screen support 220 to move in the direction of approaching or moving away from the printing platform 100. Before printing, the driving assembly can be used to drive the screen support 220 to move.

[0042] Optionally, the driving assembly comprises a power motor and a transmission member, the transmission member is capable of converting the rotary motion into linear motion and has opposite power input end and power output end, the power input end is connected with the output shaft of the power motor, and the power output end is connected with the screen frame 220. Wherein, the power motor can be a servo motor, of course, it can also be a stepper motor; the transmission member can be a screw nut structure, of course, it can also be a connecting rod structure, a gear and rack structure, etc.

[0043] Of course, in other embodiments, the driving assembly can also comprise a cylinder, a hydraulic cylinder and other power cylinders capable of linear reciprocating motion, the piston rod of the power cylinder is connected with the screen frame 220.

[0044] The positioning assembly 300 is used to make the screen 210 be at the preset height above the printing platform 100 during printing, without frequently adjusting the position of the screen 210 and switching different screens 210 during processing of the photovoltaic assembly, so that the distance between the screen 210 and the printing platform 100 remains unchanged. As shown in Figure 1 The positioning assembly 300 comprises a height limiting piece 310 and a floating piece 320, the height limiting piece 310 is protruded from the side of the printing platform 100 facing the screen 210, and / or the side of the screen 210 facing the printing platform 100, the screen frame 220 can drive the screen 210 to move, so that the screen 210 and / or the printing platform 100 abuts against the height limiting piece 310, the floating piece 320 is arranged on the screen frame 220 and connected with the screen 210, and can make the screen 210 twist when a part of the screen 210 and / or the printing platform 100 abuts against the height limiting piece 310, thereby adjusting the levelness of the screen 210.

[0045] As a first example, the height limiting piece 310 is protruded from the side of the printing platform 100 facing the screen 210, and the screen 210 can abut against the height limiting piece 310. As a second example, the height limiting piece 310 is protruded from the side of the screen 210 facing the printing platform 100, and the printing platform 100 can abut against the height limiting piece 310. As a third example, a part of the height limiting piece 310 is protruded from the side of the printing platform 100 facing the screen 210, and another part is protruded from the side of the screen 210 facing the printing platform 100, the screen 210 can abut against the part of the height limiting piece 310, and the printing platform 100 can abut against the other part of the height limiting piece 310.

[0046] Hereinafter, the working process of the positioning assembly 300 will be described by taking the example that the height limiting piece 310 is protruded from the printing platform 100:

[0047] When the battery piece to be printed is conveyed to the printing area 100a of the printing platform 100, the driving assembly drives the screen frame 220 to move towards the printing platform 100. Due to the errors in processing, assembly and the like, the screen 210 is not horizontally arranged relative to the printing platform 100, which makes part of the screen 210 abut against the height limiting piece 310 first when the screen 210 is lowered. At this time, the driving assembly needs to continue to lower the screen 210 so that the remaining part of the screen 210 also abuts against the height limiting piece 310. In this process, the height limiting piece 310 applies a pushing force to the part of the screen 210 that abuts against the height limiting piece 310 first. The pushing force is transmitted to the floating piece 320, and the floating piece 320 floats away from the printing platform 100, so that the screen 210 twists around the floating piece 320 as a fulcrum during the lowering process, thereby adjusting the levelness of the screen 210, so that the screen 210 can be horizontally arranged relative to the printing platform 100, and finally the whole part of the screen 210 abuts against the height limiting piece 310. This can arrange the screen 210 at the preset height above the printing platform 100, can ensure the uniformity of subsequent printing, and can also avoid the power motor or power cylinder of the driving assembly from stopping due to overload, and can also avoid the screen 210 from pressing the battery piece to cause the battery piece to crack. After the printing is completed, the driving assembly drives the screen frame 220 to move upwards, the screen 210 is separated from the height limiting piece 310, and the battery piece is transferred to the next station. In this way, the automatic printing is realized through the reciprocating operation.

[0048] It can be seen that, by arranging the positioning assembly 300 between the printing platform 100 and the screen assembly 200, the screen 210 can be horizontally arranged at the preset height relative to the printing platform 100 by the cooperation of the height limiting piece 310 and the floating piece 320 of the positioning assembly 300, so that the distance between the screen 210 and the printing platform 100 is kept constant. In this way, it is not necessary to frequently adjust the position of the screen 210 during the processing of the photovoltaic assembly and when switching different screens 210, and the height and shape of the glue point after each printing can also be ensured to be the same, thereby ensuring the uniformity and stability of the printing, improving the processing efficiency of the photovoltaic assembly, and improving the utilization rate.

[0049] As shown in Figure 2 In some embodiments of the present application, a plurality of height limiting pieces 310 are arranged at the outer circumferential side of the printing area 100a, and the surfaces of the plurality of height limiting pieces 310 away from the printing platform 100 are located on the same horizontal plane. The area surrounded by the height limiting pieces 310 constitutes the printing area 100a of the printing platform 100, which can identify the printing area 100a of the printing platform 100, thereby facilitating the conveying of the battery piece.

[0050] The number of the height limiting pieces 310 can be set according to the size and shape of the printing area 100a, as long as the screen plate 210 can be horizontally arranged at the preset height relative to the printing platform 100. For example, as shown in Figure 2 the printing area 100a is a rectangular area, and one height limiting piece 310 is arranged at each corner of the rectangular area; for another example, the printing area 100a is a circular area, and a plurality of height limiting pieces 310 are uniformly arranged along the circumference of the circular area, and the larger the circular area is, the more the number of the height limiting pieces 310 is.

[0051] The height limiting pieces 310 can be made of a material with high strength, such as alloy steel, titanium alloy, etc., to avoid deformation of the height limiting pieces 310 during printing. The height limiting pieces 310 can be fixed to the printing platform 100 by welding, screwing, clamping, etc., which is not limited in the present application. The height limiting pieces 310 can be fixed to the printing platform 100 by welding, screwing, clamping, etc., which is not limited in the present application. The height limiting pieces 310 can be cylindrical or columnar, which is not limited in the present application.

[0052] As shown in Figure 1 in some embodiments of the present application, two floating pieces 320 are arranged symmetrically on opposite sides of the screen plate 210. In this way, the screen plate 210 is better twisted during the downward pushing by the printing platform 100, which is beneficial to the adjustment of the horizontal degree of the screen plate 210.

[0053] Optionally, the connecting line between the two floating pieces 320 is collinear with the center line of the screen plate 210. The specific position of each floating piece 320 can be set according to the shape of the screen plate 210. For example, as shown in Figure 1 the frame part 211 of the screen plate 210 is a rectangular frame, and each floating piece 320 is arranged at the center position of the corresponding frame edge of the frame part 211; for another example, the frame part 211 of the screen plate 210 is a circular frame, and one floating piece 320 is arranged every 180° along the circumference of the frame part 211.

[0054] Continuing to refer to Figure 1 in some embodiments of the present application, the floating piece 320 includes a power cylinder, the power cylinder has a shell 321 and a stylus 322 telescopically arranged on the shell 321, the shell 321 is connected with the screen plate support 220, and the stylus 322 is connected with the screen plate 210. When the stylus 322 of the power cylinder is subjected to the pushing force of the printing platform 100, it is retracted, so that the screen plate 210 is twisted. The floating piece 320 of this structure not only facilitates the connection with the screen plate support 220 and the screen plate 210, but also enables the screen plate 210 to be stably twisted. Of course, in some other embodiments, the floating piece 320 includes an elastic body. The elastic body can be a compression spring.

[0055] Optionally, the power cylinder is a floating cylinder. Compared with a hydraulic cylinder and a common cylinder, the floating cylinder requires a relatively small reaction force (i.e., the aforementioned pushing force) for retracting the plunger 322, which is conducive to the stable twisting of the screen 210.

[0056] Optionally, as shown in Figure 3 the side of the screen 210 facing away from the printing platform 100 is provided with a mounting hole 210a, and the plunger 322 is embedded in the mounting hole 210a. The plunger 322 and the inner wall of the mounting hole 210a are in interference fit, which can not only ensure the stable connection of the two, but also facilitate the disassembly and assembly of the screen 210.

[0057] As for the diameter of the mounting hole 210a, it is only required to be able to interfere with the plunger 322 of the power cylinder. Exemplarily, the outer diameter of the plunger 322 is 10 mm, and the diameter of the mounting hole 210a is equal to or slightly smaller than 10 mm.

[0058] It can be understood that the number and position of the mounting hole 210a on the screen 210 can be the same as those of the floating member 320. Exemplarily, as shown in Figure 2 if the frame part 211 of the screen 210 is a rectangular frame, each floating member 320 is arranged at the center position of the corresponding frame edge of the frame part 211, and correspondingly, the number of mounting holes 210a is 2, and each mounting hole 210a is arranged at the center position of the corresponding frame edge of the frame part 211; again exemplarily, if the frame part 211 of the screen 210 is a circular frame, one floating member 320 is arranged every 180° along the circumference of the frame part 211, and correspondingly, the number of mounting holes 210a is 2, and one mounting hole 210a is arranged every 180° along the circumference of the frame part 211.

[0059] In some embodiments of the present application, the side of the screen 210 facing the printing platform 100 and / or the side of the printing platform 100 facing the screen support 220 is provided with a wear-resistant part 400, which can abut against the height-limiting member 310. The wear-resistant part 400 is used to abut against the height-limiting member 310, which can solve the problem of long-time contact and wear of the screen 210 and / or the printing platform 100 with the height-limiting member 310, and can protect the screen 210 and / or the printing platform 100.

[0060] The mounting position of the wear-resistant part 400 is related to the mounting position of the height-limiting part 310. For example, if the height-limiting part 310 is arranged on the side of the screen plate 210 facing the printing platform 100, the wear-resistant part 400 is arranged on the side of the printing platform 100 facing the screen plate 210. For another example, if the height-limiting part 310 is arranged on the side of the printing platform 100 facing the screen plate 210, the wear-resistant part 400 is arranged on the side of the screen plate 210 facing the printing platform 100. For another example, if part of the height-limiting part 310 is arranged on the side of the screen plate 210 facing the printing platform 100, and the other part of the height-limiting part 310 is arranged on the side of the printing platform 100 facing the screen plate 210, part of the wear-resistant part 400 is arranged on the side of the printing platform 100 facing the screen plate 210, and the other part of the wear-resistant part 400 is arranged on the side of the screen plate 210 facing the printing platform 100.

[0061] The number and arrangement of the wear-resistant part 400 can be set according to the number and arrangement of the height-limiting part 310. For example, as shown in FIG. 1, if one height-limiting part 310 is arranged at each corner of the rectangular printing area 100a, one wear-resistant part 400 is arranged at each corner of the rectangular frame part 211. Figure 2 Figure 4

[0062] Optionally, the wear-resistant part 400 comprises a metal gasket, such as an alloy steel gasket or a titanium alloy gasket. The wear-resistant part 400 has a simple structure and excellent wear resistance. The metal gasket can be installed by one-piece forming, welding, screwing, clamping, etc. The installation method of the metal gasket is not limited in the present application.

[0063] Optionally, the side of the screen plate 210 facing the printing platform 100 and / or the side of the printing platform 100 facing the screen plate support 220 is recessed, and the wear-resistant part 400 is accommodated in the recess. The depth of the recess is the same as the length of the wear-resistant part 400. In this way, the wear-resistant part 400 can be prevented from protruding from the screen plate 210 or the printing platform 100, and from colliding with other components of the screen printing mechanism 10 or the battery sheet. The number and position of the recesses are the same as those of the wear-resistant parts 400. It can be understood that the depth direction of the recess is the same as the length direction of the wear-resistant part 400.

[0064] In another aspect, an embodiment of the present application also provides a photovoltaic module processing system, which comprises the screen printing mechanism 10 according to any one of the above.

[0065] ​​The photovoltaic module processing system, by setting the positioning assembly 300 between the printing platform 100 and the screen assembly 200, can use the cooperation of the height limiting piece 310 and the floating piece 320 of the positioning assembly 300 to horizontally set the screen 210 at a predetermined height relative to the printing platform 100, keep the distance between the screen 210 and the printing platform 100 constant, so that it is not necessary to frequently adjust the position of the screen 210 during the processing of the photovoltaic module and to adjust the position of the screen 210 when switching different screens 210, and it can also ensure that the height and shape of the glue point are the same after each printing, ensure the uniformity and stability of the printing, and also improve the processing efficiency of the photovoltaic module and improve the utilization rate.

[0066] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0067] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. An apparatus for screen printing, the apparatus comprising: The printing platform; The screen assembly is arranged opposite to the printing platform and comprises a screen support and a screen which is movably arranged on the screen support; And The positioning assembly comprises a height limiting piece and a floating piece, the height limiting piece is protruded from a side of the printing platform which faces the screen and / or a side of the screen which faces the printing platform, the screen support can drive the screen to move so that the screen and / or the printing platform abuts against the height limiting piece; the floating piece is arranged on the screen support and connected with the screen, when a part of the screen and / or the printing platform abuts against the height limiting piece, the floating piece can twist the screen to adjust the levelness of the screen. The side of the printing platform which faces the screen has a printing area, the height limiting piece is provided with a plurality of height limiting pieces which are arranged at the outer circumferential side of the printing area, and the surfaces of the plurality of height limiting pieces which are away from the printing platform are located on the same horizontal plane.

2. The screen printing mechanism according to claim 1, characterized in that, The floating piece is provided with two floating pieces which are symmetrically arranged on opposite sides of the screen.

3. The screen printing mechanism of claim 1, wherein, The floating piece comprises a power cylinder which has a shell and a thimble which is telescopically arranged on the shell, the shell is connected with the screen support, and the thimble is connected with the screen.

4. The screen printing mechanism of claim 1, wherein, The side of the screen which is away from the printing platform is provided with a mounting hole, and the thimble is embedded in the mounting hole.

5. The screen printing mechanism of claim 4, wherein, The side of the screen which faces the printing platform and / or the side of the printing platform which faces the screen support is provided with a wear-resistant part which can abut against the height limiting piece.

6. The screen printing mechanism according to any one of claims 1 to 5, characterized in that, The wear-resistant part comprises a metal gasket.

7. The screen printing mechanism of claim 6, wherein, The screen support comprises a frame and a mounting rack which is arranged on the side of the frame which faces the printing platform, the screen is arranged on the side of the frame which faces the printing platform and overlaps the mounting rack, and the screen and the frame have a movable gap therebetween.

8. The screen printing mechanism according to any one of claims 1 to 5, characterized in that, The screen printing mechanism further comprises a driving assembly which is connected with the screen support and can drive the screen support to move away from or close to the printing platform.

9. The screen printing mechanism according to any one of claims 1 to 5, characterized in that, The screen printing mechanism comprises any one of the screen printing mechanisms according to claims 1 to 9.

10. A photovoltaic module processing system characterized by, ​

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