Printing table and screen printing machine

Abstract

The embodiment of the utility model discloses a printing table and a screen printer, the printing table comprises a bearing table, a paper winding mechanism and a vertical plate, the bearing table is arranged on the vertical plate, the paper winding mechanism comprises a first roller, a second roller, a roller driving assembly and roll paper, and the roller driving assembly is arranged on the side of the bearing table or the vertical plate; the projection of the bearing table and the projection of the roller driving assembly in the vertical direction do not coincide. By means of the bearing table, the printing table finally has the small thickness, the moving stroke is reduced when the multiple printing tables move at the same time and avoid one another, and then the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of photovoltaic cell manufacturing, specifically to a printing table and a screen printing machine. Background Technology

[0002] Screen printing is one of the processes for forming grid lines on solar cells. The industry typically uses screen printing machines to perform screen printing on solar cells. Chinese Utility Model Patent 202120818393.2 discloses a solar cell printing table and a solar cell printing device. The solar cell printing table includes, from top to bottom, at least a support platform, a solar cell translation mechanism, and a mounting plate. The solar cell translation mechanism includes a paper delivery roller, a paper release roller, a paper winding mechanism, and a drive mechanism. The drive mechanism is located below the support platform, allowing the printing table to... have Larger thickness This occupies too much space inside the machine; existing linear screen printing machines typically include at least two alternating, cyclically moving printing tables, with each table positioned on either side of the base and at different vertical heights to avoid interfering with the others. With a large thickness The two printing tables need to move a long distance to avoid each other, which slows down production efficiency. Utility Model Content

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application provides a printing table that solves the problem of printing tables occupying a large amount of space in the prior art.

[0004] The objective of this application can be achieved through the following technical solutions:

[0005] A printing table is slidably mounted on the base of a screen printing machine. The printing table includes a support platform, a paper winding mechanism, and a vertical plate. One end of the support platform is fixedly mounted on the top of the vertical plate. The paper winding mechanism includes a first roller, a second roller, a roller drive assembly, and a paper roll. The first roller and the second roller are respectively mounted on opposite edges of the support platform. One end of the paper roll is wrapped around one of the first roller and the second roller, and the other end of the paper roll wraps around the surface of the support platform and is fixedly connected to the other of the first roller and the second roller. The roller drive assembly is used to drive the first roller and the second roller to rotate. The roller drive assembly is mounted on the side of the support platform or on the vertical plate. The projections of the support platform and the roller drive assembly in the vertical direction do not coincide.

[0006] The printing table provided in this application uses a paper roll provided by a paper roll mechanism located on the surface of the support platform to support the battery cells. The roller drive assembly of the paper roll mechanism is set on the support platform or vertical plate, so that the vertical projection of the roller drive assembly and the support platform do not overlap. Compared with existing printing tables, the printing table of this application significantly reduces the space occupation and reduces the travel of the printing tables to avoid each other, thereby improving production efficiency. It also reduces the load and avoids the sag of the end of the printing table away from the vertical plate. The use of a paper roll mechanism can prevent the paste from falling into the groove of the printing table when the screen breaks, making cleaning and maintenance more convenient and improving production efficiency.

[0007] Optionally, the paper winding mechanism further includes a first pressure roller and a second pressure roller whose extension direction is consistent with that of the first roller. The first pressure roller and the first roller are mounted on the first side of the support platform, and the second pressure roller and the second roller are mounted on the second side of the support platform. The mounting positions of the first pressure roller and the second pressure roller are higher than the mounting positions of the first roller or the second roller, and the bottom ends of the first pressure roller and the second pressure roller are both lower than the support surface of the support platform.

[0008] The roll of paper released from the first roller extends from below the first pressure roller and the first side of the support platform to above the support platform, and is then received onto the second roller from the second side of the support platform and below the second pressure roller.

[0009] By setting a first pressure roller and a second pressure roller, a limiting effect can be provided for the paper roll that is being wound around, so that the paper roll can be wound from a lower height onto the support platform, thereby improving the adhesion effect of the paper roll.

[0010] Optionally, the support platform includes a translucent cover plate and a tray plate. The upper surface of the tray plate has a first hollow area. The cover plate is fixedly mounted on the tray plate and forms an air cavity with the first hollow area. The surface of the cover plate is provided with adsorption holes for adsorbing battery cells. The air cavity is connected to an air source device.

[0011] With the above settings, the carrier platform can use the suction holes to attach and fix the battery cells through the paper roll when carrying them, preventing the battery cells from shifting during transport and printing.

[0012] Optionally, a light source is provided inside the first hollowed-out area.

[0013] By placing a light source within the first hollowed-out area, suitable lighting can be provided for the positioning camera that captures the battery cells, thereby improving the accuracy of positioning.

[0014] Optionally, the lower surface of the tray gradually rises away from the vertical plate.

[0015] By setting the lower surface of the pallet to gradually rise away from the vertical plate, a reinforcing rib structure can be formed to prevent sagging and deformation during long-term use.

[0016] Optionally, a second hollow area for weight reduction is provided on the lower surface of the tray.

[0017] By setting up hollowed-out areas for weight reduction, the weight can be effectively reduced, preventing sagging and deformation.

[0018] Optionally, the roller drive assembly includes a motor and two transmission components, the motor being connected to the first roller and the second roller respectively via the two transmission components; or,

[0019] The roller drive assembly includes two motors and two transmission components. The two motors drive the first roller and the second roller respectively through the two transmission components.

[0020] Two feasible implementation methods are provided, which use one or two motors to drive the first and second rollers to achieve the release and retraction of the paper roll.

[0021] Optionally, the transmission component is a coupling or a synchronous belt pulley structure, wherein the synchronous belt pulley structure includes a synchronous belt and two synchronous pulleys.

[0022] By setting up transmission components, the motor can be positioned in different locations to adapt to actual conditions.

[0023] Optionally, the printing table also includes a transverse component and a lifting component, the transverse component being configured to slide in connection with the base of the screen printing machine, the lifting component being disposed on the drive end of the transverse component, and the vertical plate being disposed on the drive end of the lifting component.

[0024] By setting up a horizontal movement component and a lifting component, the printing table can be moved and raised / lowered.

[0025] A screen printing machine, which includes the printing table mentioned above.

[0026] Screen printing machines using this type of printing table can improve production efficiency. Attached Figure Description

[0027] The present application will be further described below with reference to the accompanying drawings.

[0028] Figure 1 This is a schematic diagram of the printing table of this application from a certain perspective;

[0029] Figure 2 This is a schematic diagram of the printing table of this application from a top-down perspective;

[0030] Figure 3 This is a partial structural schematic diagram of the support platform and roller drive assembly of this application from a certain perspective;

[0031] Figure 4 This is a partial structural schematic diagram of the printing table of this application from a certain perspective;

[0032] Figure 5 This is a partial structural schematic diagram of the first roller, second roller, first pressure roller, and second pressure roller of this application from a certain perspective;

[0033] Figure 6 This is an exploded view of the support platform of this application from a certain perspective;

[0034] Figure 7 This is a schematic diagram of the overall structure of the screen printing machine of this application.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Printing table;

[0037] 11. Support platform; 111. Cover plate; 1111. Adsorption hole; 112. Support plate; 1121. First hollow area; 1122. Second hollow area;

[0038] 12. Paper winding mechanism; 121. First roller; 122. Second roller; 123. Roller drive assembly; 1231. Motor; 1232. Transmission component; 125. First pressure roller; 126. Second pressure roller;

[0039] 13. Vertical plate; 2. Screen printing machine; 21. Base. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] Screen printing is one of the processes for forming grid lines on solar cells. The industry typically uses screen printing machines to perform screen printing on solar cells. For example, Chinese utility model patent 202120818393.2 discloses a solar cell printing table and a solar cell printing device. The solar cell printing table, from top to bottom, includes at least a support platform, a solar cell translation mechanism, and a mounting plate. The solar cell translation mechanism includes a take-up roller, a feed roller, a paper winding mechanism, and a drive mechanism. The drive mechanism is located below the support platform, resulting in a relatively thick printing table that occupies excessive space within the machine. Furthermore, existing linear screen printing machines typically include at least two alternating, cyclically moving printing tables, each positioned on either side of the base and avoiding each other at different vertical heights. Due to the considerable thickness of the printing tables, the two printing tables need to move a long distance vertically to avoid each other, slowing down production efficiency.

[0042] To solve this problem, this application provides a printing table 1, which is slidably mounted on the base 21 of the screen printing machine 2, such as... Figure 1 As shown, the printing table 1 includes a support platform 11, a paper winding mechanism 12, and a vertical plate 13. One end of the support platform 11 is fixedly mounted on the top of the vertical plate 13. The paper winding mechanism 12 includes a first roller 121, a second roller 122, a roller drive assembly 123, and a paper roll. The first roller 121 and the second roller 122 are respectively disposed on opposite edges of the support platform 11. One end of the paper roll is wrapped around one of the first roller 121 and the second roller 122, and the other end of the paper roll wraps around the surface of the support platform 11 and is fixedly connected to the other of the first roller 121 and the second roller 122. The roller drive assembly 123 is used to drive the first roller 121 and the second roller 122 to rotate. The roller drive assembly 123 is disposed on the side of the support platform 11 or on the vertical plate 13. Further reference... Figure 2 As shown, the projections of the support platform 11 and the roller drive assembly 123 in the vertical direction do not coincide.

[0043] The printing table 1 provided in this application has the roller drive assembly 123 of the paper winding mechanism 12 mounted on the support platform 11 or the vertical plate 13, rather than below the support platform 11, so that the projections of the roller drive assembly 123 and the support platform 11 in the vertical direction do not overlap. Compared with the existing printing table 1, the printing table 1 of this application has significantly reduced thickness, reduced space occupation, and thus reduced the travel of the printing tables 1 to avoid each other, ultimately improving production efficiency; at the same time, it also reduces the load and prevents the end of the printing table 1 away from the vertical plate 13 from sagging; furthermore, the paper winding mechanism 12 can catch the ink leaking from the broken screen, preventing ink from contaminating the support platform 11, making cleaning and maintenance more convenient and improving production efficiency.

[0044] To ensure that the paper roll of the paper roll mechanism 12 adheres more tightly to the support platform 11, such as Figure 3-4 As shown, the paper winding mechanism 12 also includes a first pressure roller 125 and a second pressure roller 126 extending in the same direction as the first roller 121. The first pressure roller 125 and the first roller 121 are mounted on the first side of the support platform 11, and the second pressure roller 126 and the second roller 122 are mounted on the second side of the support platform 11. The mounting positions of the first pressure roller 125 and the second pressure roller 126 are higher than the mounting positions of the first roller 121 or the second roller 122. The bottom ends of the first pressure roller 125 and the second pressure roller 126 are both lower than the bearing surface of the support platform 11.

[0045] The roll of paper released from the first roller 121 extends below the first pressure roller 125, along the first side of the support platform 11, to above the support platform 11, and is then received onto the second roller 122 via the second side of the support platform 11, below the second pressure roller 126. Figure 4 In the image, several arrows connected end to end indicate a way of wrapping the roll of paper, which extends from left to right as a whole.

[0046] To facilitate the fixing of the battery cells during the transport and screen printing stages, such as Figure 5 As shown, the support platform 11 includes at least a semi-transparent cover plate 111 and a support plate 112. A first perforated area 1121 is formed on the upper surface of the support plate 112. The cover plate 111 is fixedly mounted on the support plate 112 and sealed to the first perforated area 1121 to form an air cavity. The surface of the cover plate 111 is provided with adsorption holes 1111 for adsorbing battery cells. The air cavity is connected to an air source device. When the air source device provides negative pressure to the air cavity, the adsorption holes 1111 communicating with the air cavity will adsorb and fix the battery cells through the rolled paper, preventing the battery cells from shifting. Figure 5 In the middle, the cover plate 111 includes three sub-cover plates that are sequentially adjacent in the horizontal direction. The two side sub-cover plates are used to support two battery cells respectively, and the surface is provided with adsorption holes 1111. The middle sub-cover plate is not provided with adsorption holes 1111. Correspondingly, the first hollow area 1121 that cooperates with the middle sub-cover plate does not need to be connected to the air source.

[0047] Furthermore, to facilitate camera positioning, a light source can be installed inside the first hollow area 1121. The light source is activated at least when the camera takes a picture to illuminate the edge of the battery cell and improve the positioning accuracy.

[0048] The printing table 1 of a linear screen printing machine typically adopts a cantilever design. To alleviate fatigue and sagging of the support table 11 during long-term use, such as... Figure 5 As shown, the lower surface of the support plate 112 gradually rises in the direction away from the vertical plate 13. This arrangement forms a reinforcing rib structure, mitigating the occurrence of sagging deformation.

[0049] To further mitigate the deformation caused by descent, continue to refer to Figure 6 The lower surface of the tray 112 has a second hollow area 1122 for weight reduction, which can effectively reduce the weight.

[0050] The paper winding mechanism 12 needs to drive the paper roll for winding and unwinding at different times, so the roller drive assembly 123 may include a motor 1231 and two transmission components 1232. The motor 1231 is connected to the first roller 121 and the second roller 122 respectively via the two transmission components 1232; or, as Figure 3As shown, the roller drive assembly 123 may include two motors 1231 and two transmission components 1232. The two motors 1231 drive the first roller 121 and the second roller 122 respectively through the two transmission components 1232. Specifically, when the first roller 121 is driven to rotate by one motor 1231 to release a predetermined length of paper roll, the second roller 122 is driven to rotate by the other motor 1231. The first roller 121 and the second roller 122 rotate in the same direction. The second roller 122 has predetermined damping through the other motor 1231, so that the paper roll remains taut during the unwinding stage.

[0051] As a feasible and easy-to-maintain option, the transmission component 1232 can be a coupling or a synchronous belt pulley structure, with the synchronous belt pulley structure including at least one synchronous belt and two synchronous pulleys. The motor 1231 can be set in different positions, and appropriate transmission components 1232 can be used accordingly to adapt to actual conditions.

[0052] During the operation of the linear screen printing machine, the printing table 1 needs to reciprocate in the horizontal and / or vertical directions. The printing table 1 also includes a transverse component and a lifting component. The transverse component is configured to drive the carrier table 11 along the base 21 of the screen printing machine 2 in the horizontal direction. The transverse component may include a linear motor 1231, a mounting plate, and a long guide rail. The long guide rail is set on the side of the base 21 and extends in the horizontal direction. The mover of the linear motor 1231 is set on the mounting plate, and the stator of the linear motor 1231 is set on the base 21 in the horizontal direction. The mounting plate is set on the long guide rail by several sliders. The mover moves along the stator, eventually driving the carrier table 11 to move horizontally. The lifting component is set on the drive end (i.e., the mounting plate) of the transverse component. The lifting component includes short guide rails, a lead screw module, and a lifting motor, all of which are set on the mounting plate. The vertical plate 13 is slidably set on the short guide rail by sliders, and the vertical plate 13 is fixedly connected to the lead screw nut of the lead screw module. The lifting motor drives the vertical plate 13 to rise and fall through the lead screw module, thereby driving the carrier table 11 to rise and fall. The above settings enable the printing table 1 to move and rise, allowing screen printing to proceed efficiently and smoothly.

[0053] like Figure 7 As shown, this application also provides a screen printing machine 2, which includes at least two printing tables 1. The two printing tables 1 can alternately and cyclically transport battery cells to the loading station, unloading station, and printing station, and avoid each other at different heights when they meet. The screen printing machine 2 using this type of printing table 1 can improve production efficiency.

[0054] To transfer the solar cells from the upstream conveyor line to the printing table 1, the screen printing machine 2 may include an upper transfer mechanism 22. The upper transfer mechanism 22 includes an adsorption component and a belt conveyor component. The belt conveyor component includes at least a servo motor and a conveyor belt. The adsorption component is located above the lower side of the conveyor belt. The adsorption component applies a force to the solar cells to be transferred to the printing table 1, causing the solar cells to move upwards and adhere to the lower surface of the lower side of the conveyor belt, moving with the conveyor belt. The adsorption component can be configured with a structure having a blowing slit, blowing air along the surface of the solar cells, using Bernoulli's principle to apply an upward force to the solar cells, causing them to adhere to the conveyor belt; alternatively, the adsorption component can use vacuum adsorption to apply an upward force to the solar cells, similarly achieving adhesion to the conveyor belt. When the solar cells move with the conveyor belt to above the printing table 1, the adsorption component releases the positive pressure blowing or vacuum adsorption, and the solar cells fall onto the printing table 1.

[0055] The specification of this application lists several embodiments. Where there is no conflict, at least two of the above embodiments can be combined to achieve the corresponding technical effects. The combined embodiments are still within the scope of this application's specification and will not be described exhaustively. Furthermore, while at least one embodiment of this application has been described in detail above, the content is only a preferred embodiment and should not be considered as limiting the scope of this application. All equivalent changes and improvements made within the scope of this application should still fall within the patent coverage of this application.

[0056] It should be noted that the terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Descriptions in this application regarding directions such as "left," "right," "left side," "right side," "upper part," "lower part," "top," and "bottom" are defined based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, not to indicate or imply that the described structure must be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0057] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

Claims

1. A printing table which is slidably provided on a base of a screen printing machine, characterized in that, The printing table includes a support platform, a paper winding mechanism, and a vertical plate. One end of the support platform is fixedly disposed at the top of the vertical plate. The paper winding mechanism includes a first roller, a second roller, a roller drive assembly, and a paper roll. The first roller and the second roller are respectively disposed on opposite edges of the support platform. One end of the paper roll is wrapped around one of the first roller and the second roller, and the other end of the paper roll passes over the surface of the support platform and is fixedly connected to the other of the first roller and the second roller. The roller drive assembly is used to drive the first roller and the second roller to rotate. The roller drive assembly is disposed on the side of the support platform or on the vertical plate. The projections of the support platform and the roller drive assembly in the vertical direction do not coincide.

2. The printing station according to claim 1, characterized in that The paper winding mechanism further includes a first pressure roller and a second pressure roller whose extension direction is consistent with that of the first roller. The first pressure roller and the first roller are installed on the first side of the support platform, and the second pressure roller and the second roller are installed on the second side of the support platform. The installation positions of the first pressure roller and the second pressure roller are higher than the installation positions of the first roller or the second roller, and the bottom ends of the first pressure roller and the second pressure roller are both lower than the support surface of the support platform. The roll of paper released from the first roller extends from below the first pressure roller and the first side of the support platform to above the support platform, and is then received onto the second roller from the second side of the support platform and below the second pressure roller.

3. The printing station according to claim 1, characterized in that The support platform includes a semi-transparent cover plate and a support plate. The upper surface of the support plate has a first hollow area. The cover plate is fixedly mounted on the support plate and forms an air cavity with the first hollow area. The surface of the cover plate is provided with adsorption holes for adsorbing battery cells. The air cavity is connected to an air source device.

4. The printing station according to claim 3, characterized in that A light source is installed inside the first hollowed-out area.

5. The printing station according to claim 3, characterized in that The lower surface of the tray gradually rises in the direction away from the vertical plate.

6. The printing station according to claim 3, characterized in that The lower surface of the tray has a second hollow area for weight reduction.

7. The printing station of claim 1, wherein, The roller drive assembly includes a motor and two transmission components, wherein the motor is connected to the first roller and the second roller respectively via the two transmission components; or... The roller drive assembly includes two motors and two transmission components, with the two motors driving the first roller and the second roller respectively through the two transmission components.

8. The printing station according to claim 7, characterized in that The transmission component is a coupling or a synchronous belt pulley structure, wherein the synchronous belt pulley structure includes a synchronous belt and two synchronous pulleys.

9. The printing station of claim 1, wherein, The printing table also includes a transverse component and a lifting component. The transverse component is configured to be slidably connected to the base of the screen printing machine. The lifting component is disposed on the drive end of the transverse component, and the vertical plate is disposed on the drive end of the lifting component.

10. A screen printer characterized by comprising: The screen printing machine includes the printing table according to any one of claims 1-9.

Images