A screen printing balance coordination system

Abstract

This invention discloses a screen printing collaborative control system, belonging to the field of solar cell process equipment. It includes a machine base, a screen holder, a squeegee driver, a screen, a program control system, a printing system, and a squeegee system. The machine base is mechanically connected to the squeegee driver and the screen holder, with the screen embedded in the screen holder. The machine base is also embeddedly connected to the program control system and the printing system. The program control system is mechanically and electrically connected to the printing system, and the squeegee driver is mechanically and electrically connected to the squeegee system. This invention optimizes the production and manufacturing process, solving the problems of screen wear and low printing yield caused by control system defects in traditional screen printing.

Description

Technical Field

[0001] This invention belongs to the field of solar cell process equipment, specifically relating to a screen printing balance coordination system. Background Technology

[0002] Solar energy, as a new type of sustainable green energy, is a hot topic now and in the future, with great development potential, and photovoltaic power generation projects are highly favored by capital. The production process of solar cells is the core of photovoltaic power generation; their photoelectric conversion efficiency determines the product's competitiveness, and production speed represents the economic benefits of photovoltaic companies. From its inception to the present, solar cells have undergone continuous technological innovation and rapid product iteration. Surface grid lines have played a crucial role. Whether using high-temperature or low-temperature pastes, to better transport electrons and reduce shading area, grid line development is trending towards low resistance, multiple main grids, and fine sub-grids. Screen printing is an indispensable part of the photovoltaic industry, directly impacting its development.

[0003] Individual sample variations in screen printing can lead to printing errors, resulting in significant differences within the same batch of batteries during mass production. Furthermore, variations in printing quality due to differences in battery thickness necessitate independent redesign of the printing plane and squeegee, severely impacting production efficiency and reducing batch yield. This screen printing balance and coordination system improves the yield rate of screen printing while reducing wear on the screen due to the substrate, thereby lowering production costs. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide a screen printing balance and coordination system that optimizes production and manufacturing processes, and solves the problems of screen wear and low printing yield caused by defects in the control system during traditional screen printing.

[0005] This invention is achieved through the following technical solution:

[0006] This invention provides a screen printing balance and coordination system, including a machine base, a screen holder, a squeegee driver, a screen, a program control system, a printing system, and a squeegee system; the machine base is mechanically connected to the squeegee driver and the screen holder, and the screen is embedded in the screen holder; the machine base is embeddedly connected to the program control system and the printing system; the program control system is mechanically and electrically connected to the printing system, and the squeegee driver is mechanically and electrically connected to the squeegee system.

[0007] In an optional embodiment, the program control system includes the rotating base, a transmission control line, and a program controller; the program controller is mechanically and electrically connected to the transmission control line, which is connected to the printing system and the doctor blade system through the rotating base and inserted into the machine base for signal transmission control; the rotating base is installed inside the machine base and at the center of gravity of the machine base to achieve overall balance and stability of the machine.

[0008] In an optional embodiment, the printing system includes the rotating support column, branch air pressure channels, printing base, balancing telescopic device air path, balancing telescopic device, height change head, printing table, main control electrical circuit, balancing circuit master controller, and laser detector.

[0009] Specifically, the rotating support column is connected to the rotating base, and the rotating support column is connected to the printing base, and at least one printing base is provided.

[0010] Each printing base has an independent printing table surface above it, and at least one balancing telescopic device is installed below the printing table surface. The balancing telescopic devices are interconnected through air circuits. A height adjustment head is installed separately above each balancing telescopic device. The height adjustment head contacts the printing table surface and works in coordination with the air circuits of the balancing telescopic devices to change the height of the height adjustment head, thereby balancing and adjusting the printing table surface through different height changes.

[0011] In an optional embodiment, the laser detector is disposed on the frame of the machine base and is electrically connected in sequence to the main control circuit and the balance circuit master controller.

[0012] In an optional embodiment, the rotating support column is connected to the rotating base, and the rotating support column is connected to the printing base. At least one printing base is provided. The rotation is controlled by rotating the rotating support column, which drives the printing base to perform mechanical movement in the same pattern.

[0013] Because multiple printing bases are set, the rotating mechanical motion of the rotating support column is used to print multiple batches of printing on the multiple printing bases to improve efficiency. Multiple angles are set to improve rotation efficiency.

[0014] In an optional embodiment, the program controller performs program control on the balance circuit master controller via a transmission control line, and the balance circuit master controller performs electrical coordinated control on the branch air pressure channel, the balance telescopic device air path, the balance telescopic device, the height change head, the printing table, and the laser detector via the main control electrical circuit.

[0015] In an optional embodiment, the scraper system includes the scraper, a pressure sensor, an inner ball cup, an outer ball cup, a micro airbag control device, an airbag air passage, an outer ball cup locking device, an outer ball cup retainer, a scraper system fixing device, a scraper system electrical circuit, a scraper system balancing device, and a scraper system main controller.

[0016] Specifically, the scraper is connected to the pressure sensor, which is connected to the outer ball cup. The outer ball cup is fixed to the scraper system fixing device via an outer ball cup locking device and an outer ball cup retainer. A micro airbag control device is provided on the outer surface of the inner ball cup. The micro airbag control device is connected to the airbag air passage, which is built into the inner ball cup. The outer ball cup locking device is mechanically connected to the outer ball cup retainer, and the outer ball cup retainer is located on the scraper system fixing device. The scraper system electrical circuit is connected to the airbag air passage and the scraper system balancing device. The scraper balancing device is connected to the scraper system main controller.

[0017] This embodiment provides a screen printing balancing and coordination system applied in the field of solar cell production, primarily for the mass production of solar cells. It utilizes a multi-pressure balancing system printing platform combined with a 360° adjustable squeegee. Compared to the mechanical structure of traditional screen printing, the original structure's squeegee cannot be adjusted at multiple angles on the silicon wafer through the balancing system. Furthermore, the original screen printing table cannot coordinate the squeegee's balancing operation through air pressure balancing. The screen printing balancing and coordination system built upon this foundation effectively improves the yield rate of screen printing production while reducing costs caused by substrate wear on the screen. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional analytical diagram of a screen printing balanced collaborative system structure provided in an embodiment of the present invention;

[0020] Figure 2 This is a detailed schematic diagram of a squeegee in a screen printing balance and coordination system structure provided in an embodiment of the present invention;

[0021] Figure 3 This is a detailed schematic diagram of a printing base for a screen printing balanced collaborative system structure provided in an embodiment of the present invention.

[0022] 101. Machine base; 102. Screen holder; 103. Scraper driver; 104. Screen;

[0023] 20. Program control system; 201. Rotating base; 202. Transmission control line; 203. Program controller;

[0024] 30. Printing system; 301. Rotating support column; 302. Branch air pressure channel; 303. Printing base; 304. Air path for balancing telescopic device; 305. Balancing telescopic device; 306. Height adjustment head; 307. Printing table; 308. Main control circuit; 309. Main controller for balancing circuit; 310. Laser detector;

[0025] 40. Scraper system; 401. Scraper; 402. Pressure sensor; 403. Inner ball cup; 404. Outer ball cup; 405. Miniature airbag control device; 406. Airbag air path; 407. Outer ball cup locking device; 408. Outer ball cup retainer; 409. Scraper system fixing device; 410. Scraper system electrical circuit; 411. Scraper system balancing device; 412. Scraper system main controller. Detailed Implementation

[0026] The present invention will be further described below with reference to embodiments and accompanying drawings, but this is not intended to limit the scope of protection of the claims of this application. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "center," "longitudinal," "lateral," "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Traditional screen printing machinery cannot adjust the silicon wafer at multiple angles using a balancing system for the original screen printing squeegee. On one hand, for cells with different substrates, film surfaces, thicknesses, and even uneven thicknesses, printing is inherently considered substandard. On the other hand, the original screen printing table cannot coordinate the squeegee's balancing operation through air pressure. This invention, based on these limitations, constructs a screen printing balancing coordination system that effectively improves the yield rate of screen printing production. Simultaneously, it reduces wear on the screen due to the substrate, allows the screen printing machine to adjust to samples under various conditions according to their specific circumstances, significantly reducing production costs and increasing production efficiency.

[0029] Please see Figure 1 This invention provides a screen printing balance and coordination system, including a machine base 101, a screen holder 102, a squeegee driver 103, a screen 104, a program control system 20, a printing system 30, and a squeegee system 40. The machine base 101 is mechanically connected to the squeegee driver 103 and the screen holder 102, with the screen 104 embedded in the screen holder 102. The machine base 101 is embeddedly connected to the program control system 20 and the printing system 30. The program control system 20 is mechanically and electrically connected to the printing system 30, and the squeegee driver 103 is mechanically and electrically connected to the squeegee system 40. The machine base 101, screen holder 102, squeegee driver 103, screen 104, program control system 20, printing system 30, and squeegee system 40 together constitute the screen printing balance and coordination system.

[0030] In this embodiment, the machine base 101, screen holder 102, squeegee driver 103, screen 104, program control system 20, printing system 30, and squeegee system 40 are all parallel in the horizontal direction. When screen printing the battery substrate, the battery is placed on a horizontal platform of the machine base 101, and the printing and control of each component on the battery surface are uniform.

[0031] In other embodiments, the screen 104 can be replaced with a corresponding size according to the sample, and can be replaced with sizes such as 650, 550, and 450 according to the screen frame size. The screen holder 102 can be embedded mechanically fixed to the screen 104 with different screen frame sizes.

[0032] Please see Figure 1The program control system 20 includes the rotating base 201, a transmission control line 202, and a program controller 203. The program controller 203 is mechanically and electrically connected to the transmission control line 202. The transmission control line 202, through the rotating base, is connected to the printing system 30 and the doctor blade system 40, passing through the machine base 101, and performs signal transmission control. The rotating base 201 is installed inside the machine base 101 and at the center of gravity to achieve overall balance and stability of the machine.

[0033] Please see Figure 1 and 3 The printing system 30 includes a rotating support column 301, branch air pressure channels 302, a printing base 303, a balancing telescopic device air passage 304, a balancing telescopic device 305, a height adjustment head 306, a printing table 307, a main control electrical circuit 308, a balancing circuit master controller 309, and a laser detector 310. The rotating support column 301 is connected to the rotating base 201, and the rotating support column 301 is connected to the printing base 303, and multiple printing bases 303 are provided. Each printing base 303 has an independently installed printing table 307. Multiple balancing telescopic devices 305 are installed below the printing table 307, and these devices are interconnected via air passages 304. Each balancing telescopic device 305 has a separate height adjustment head 306 above it. Each height adjustment head 306 contacts the printing table 307 and works in concert through the air passages 304 to balance and adjust the air pressure, causing the height adjustment head 306 to change height, thereby balancing the printing table 307 through different height changes. Multiple laser detectors 310 are installed on the frame of the machine base 101 and are electrically connected sequentially to the main control circuit 308 and the balance circuit master controller 309.

[0034] In this embodiment, the rotating support column 301 is connected to the rotating base 201, and the rotating support column 301 is connected to the printing base 303. Multiple printing bases 303 are provided. The rotating base 201 stabilizes and balances the overall structure. The rotation of the rotating support column 301 is controlled, allowing for stepless rotation at any angle or equidistant rotation at a fixed angle through program settings and manual operation. Since the rotating support column 301 is connected to the printing base 303, the mechanical movement of the rotating support column 301 drives the printing bases 303 to perform the same mechanical movement. Because multiple printing bases 303 are provided, the mechanical movement of the rotating support column 301 enables multiple batches of printing on the multiple printing bases 303, improving efficiency. Multiple angle settings further enhance rotational efficiency.

[0035] In other embodiments, the plurality of printing base bases 303 may be equipped with a plurality of rotating bases by means of mechanical structure design. For example, two bases may be used to operate at a rotation angle of 180° each, three bases may be used to operate at a rotation angle of 120° each, four bases may be used to operate at a rotation angle of 90° each, five bases may be used to operate at a rotation angle of 72° each, six bases may be used to operate at a rotation angle of 60° each, and more bases and rotation angle combinations will not be further exemplified here.

[0036] In this embodiment, the program controller 203 performs program control on the balance circuit master controller 309 through the transmission control line 202. The balance circuit master controller 309 performs electrical coordinated control on the branch air pressure channel 302, the balance telescopic device air path 304, the balance telescopic device 305, the height change head 306, the printing table 307, and the laser detector 310 through the main control electrical circuit 308.

[0037] In other embodiments, if the printing table 307 is not in a balanced state, the laser detector 310 performs a balance test on the sample. If the laser detector is blocked, the sample is in an unbalanced state. The height is adjusted by the coordinated operation of multiple balance telescopic devices 305 and height change head 306. If the laser detector 310 is unobstructed, the sample is in a balanced state, and the coarse inspection coordination of the screen printing balance coordination system can be completed.

[0038] In other embodiments, if the printing table 307 is in a balanced state, the laser detector 310 performs a balance test on the sample. If the horizontal laser detector 310 is still blocked, the laser detector 310 perpendicular to the printing table 307 can perform laser ranging. If the overall height is high, it can be determined that the printing table 307 is in a balanced state. However, due to individual differences in the samples and different sizes and specifications, the overall height is high. Multiple balance telescopic devices 305 and height change heads 306 work together to change the height, which can eventually make the printing table 307 move downwards as a whole. After confirming that the horizontal laser detector 310 has returned to normal, the coarse inspection collaboration of the screen printing balance collaboration system is completed.

[0039] Please see Figure 1 and 2The scraper system 40 includes a scraper 401, a pressure sensor 402, an inner ball cup 403, an outer ball cup 404, a micro airbag control device 405, an airbag air passage 406, an outer ball cup locking device 407, an outer ball cup retainer 408, a scraper system fixing device 409, a scraper system electrical circuit 410, a scraper system balancing device 411, and a scraper system main controller 412. The scraper 401 is connected to the pressure sensor 402, and the pressure sensor 402 is connected to the outer ball cup 404. The outer ball cup 404 is fixed to the scraper system fixing device 409 via the outer ball cup locking device 407 and the outer ball cup retainer 408. A micro airbag control device 405 is provided on the outer surface of the inner ball cup 403, and the micro airbag control device 405 is connected to the air passage 406, which is built into the inner ball cup 403. The outer ball cup locking device 407 is mechanically connected to the outer ball cup retainer 408, and the outer ball cup retainer 408 is mounted on the scraper system fixing device 409. The scraper system electrical circuit 410 is connected to the airbag air circuit 406 and the scraper system balancing device 411, and the scraper balancing device 411 is connected to the scraper system main controller 412.

[0040] In this embodiment, the doctor blade 401 and the pressure sensor 402 are replaceable mechanical structures, as are the outer ball cup 404, the outer ball cup locking device 407, the outer ball cup retainer 408, and the micro airbag control device 405. Doctor blades 401 with different hardness, sizes, and shapes are replaced accordingly for printing different samples. The pressure sensor 402 is replaced according to different measurement accuracies and ranges to address different printing conditions. Different sizes of outer ball cups can be installed by disassembling and assembling the outer ball cup 404, the outer ball cup locking device 407, and the outer ball cup retainer 408 to meet the printing requirements of different samples. Simultaneously, the micro airbag control device 405 can be cleaned, replaced, and maintained through detachable operation. The number and fixed sensitivity of the micro airbag control device 405 can be set according to the sample requirements.

[0041] In this embodiment, the main controller 412 of the scraper system controls the scraper system 40 in real time through the electrical circuit 410 of the scraper system via an electrical signal. During the printing process, the squeegee 401 directly contacts the sample surface through the printing operation; the pressure sensor 402 acquires the corresponding pressure information, as well as the pressure difference caused by the height difference at different positions; since the height difference allows the outer ball cup 404, the outer ball cup locking device 407, and the outer ball cup retainer 408 to move freely in the unlocked state, and the surface height difference is locked before it is determined, the outer ball cup locking device 407 mechanically locks the outer ball cup retainer 408; the squeegee system electrical circuit 410 and the air bladder air circuit 406 control the micro air bladder control device 405, since there are multiple micro air bladder control devices 405 that can independently extend and retract to pneumatically lock the outer ball cup 404; the outer ball cup 404 can be effectively fixed before movement through mechanical locking and pneumatic locking; the squeegee system balancing device 411 keeps the squeegee system 40 parallel to the base at all times through the center of gravity return and mechanical structure cooperation.

[0042] In this embodiment, during the operation of the doctor blade system 40, the doctor blade 401 and pressure sensor 402 transmit parameters in real time, and the doctor blade system balancing device 411 and micro airbag control device 405 are adjusted and controlled by the doctor blade system master controller 412. This ensures that the doctor blade system 40 remains parallel to the base during travel and is appropriately adjusted according to the slight undulations of the sample surface. Furthermore, the doctor blade system 40, in conjunction with the printing system 30, performs printing balance coordination after rough inspection through the balance circuit master controller 309 and laser detector 310. By combining the rough inspection coordination to set the balance state of the printing table 307, and with the doctor blade 401 and pressure sensor 402 transmitting parameters in real time, the balance of the upper and lower surfaces of the sample is adjusted separately, while simultaneously performing coordinated balance printing to achieve the most suitable printing effect for the sample.

[0043] This invention provides a screen printing balanced collaborative system, including a machine base 101, a screen holder 102, a squeegee driver 103, a screen 104, a program control system 20, a printing system 30, and a squeegee system 40. The machine base 101 is mechanically connected to the squeegee driver 103 and the screen holder 102, with the screen 104 embedded in the screen holder 102. The machine base 101 is embeddedly connected to the program control system 20 and the printing system 30. The program control system 20 is mechanically and electrically connected to the printing system 30, and the squeegee driver 103 is mechanically and electrically connected to the squeegee system 40. The program control system 20 includes the rotating base 201, a transmission control line 202, and a program controller 203. The program controller 203 is mechanically and electrically connected to the transmission control line 202, which is connected to the printing system 30 and the squeegee system 40 through the rotating base and inserted into the machine base 101 for signal transmission control. The rotating base 201 is installed inside the machine base 101. The printing system 30 includes the rotating support column 301, branch air pressure channels 302, printing base 303, balance telescopic device air passage 304, balance telescopic device 305, height adjustment head 306, printing table 307, main control electrical circuit 308, balance circuit master controller 309, and laser detector 310. The rotating support column 301 is connected to the rotating base 201, and the rotating support column 301 is connected to the printing base 303, and multiple printing bases 303 are provided. Each printing base 303 is independently provided with a printing table 307, and multiple balance telescopic devices 305 are provided below the printing table 307. The multiple balance telescopic devices 305 are interconnected through the balance telescopic device air passage 304, and each of the multiple balance telescopic devices 305 is individually provided with a height adjustment head 306. Multiple laser detectors 310 are disposed on the frame of the machine base 101 and are connected to the main control circuit 308 via a unified electrical connection. The scraper system 40 includes the scraper 401, pressure sensor 402, inner ball cup 403, outer ball cup 404, micro airbag control device 405, airbag air passage 406, outer ball cup locking device 407, outer ball cup fixer 408, scraper system fixing device 409, scraper system electrical circuit 410, scraper system balancing device 411, and scraper system main controller 412. The scraper 401 is connected to the pressure sensor 402, and the pressure sensor 402 is connected to the outer ball cup 404. The outer ball cup 404 is fixed to the scraper system fixing device 409 by the outer ball cup locking device 407 and the outer ball cup retainer 408. A micro airbag control device 405 is provided on the outer surface of the inner ball cup 403. The micro airbag control device 405 is connected to the airbag through the airbag air passage 406, and the airbag air passage 406 is built into the inner ball cup 403.The outer ball cup locking device 407 is mechanically connected to the outer ball cup retainer 408, and the outer ball cup retainer 408 is mounted on the scraper system fixing device 409. The scraper system electrical circuit 410 is connected to the airbag air circuit 406 and the scraper system balancing device 411, and the scraper balancing device 411 is connected to the scraper system main controller 412.

[0044] The above embodiments are merely preferred embodiments of the present invention. It should be noted that, for those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle of the present invention. All technical solutions after making equivalent substitutions to the claims of the present invention fall within the protection scope of the present invention, which is defined by the appended claims and their equivalents.

Claims

1. A screen printing balance coordination system, characterized in that, The system includes a machine base, a screen holder, a squeegee driver, a screen, a program control system, a printing system, and a squeegee system. The machine base is mechanically connected to the squeegee driver and the screen holder, with the screen holder embedding the screen. The machine base is also embeddedly connected to the program control system and the printing system. The program control system is mechanically and electrically connected to the printing system, and the squeegee driver is mechanically and electrically connected to the squeegee system. The scraper system includes the scraper, pressure sensor, inner ball cup, outer ball cup, micro airbag control device, airbag air passage, outer ball cup locking device, outer ball cup retainer, scraper system fixing device, scraper system electrical circuit, scraper system balancing device, and scraper system main controller; The scraper is connected to the pressure sensor, which is connected to the outer ball cup. The outer ball cup is fixed to the scraper system fixing device via an outer ball cup locking device and an outer ball cup retainer. A miniature airbag control device is provided on the outer surface of the inner ball cup. The miniature airbag control device is connected to the airbag air passage, which is built into the inner ball cup. The outer ball cup locking device is mechanically connected to the outer ball cup retainer, and the outer ball cup retainer is located on the scraper system fixing device. The scraper system electrical circuit is connected to the airbag air passage and the scraper system balancing device. The scraper system balancing device is connected to the scraper system main controller.

2. The screen printing balance coordination system according to claim 1, characterized in that, The program control system includes a rotating base, a transmission control line, and a program controller; the program controller is mechanically and electrically connected to the transmission control line, which is connected to the printing system and the doctor blade system through the rotating base and inserted into the machine base for signal transmission control; the rotating base is installed inside the machine base and at the center of gravity of the machine base.

3. The screen printing balance coordination system according to claim 2, characterized in that, The printing system includes a rotating support column, branch air pressure channels, a printing base, a balance telescopic device air path, a balance telescopic device, a height adjustment head, a printing table, a main control electrical circuit, a balance circuit master controller, and a laser detector.

4. The screen printing balance coordination system according to claim 3, characterized in that, The rotating support column is connected to the rotating base, and the rotating support column is connected to the printing base, and at least one printing base is provided.

5. The screen printing balance coordination system according to claim 4, characterized in that, Each printing base has an independent printing table surface above it, and at least one balancing telescopic device is installed below the printing table surface. The balancing telescopic devices are interconnected through air circuits. A height adjustment head is installed above each balancing telescopic device and contacts the printing table surface.

6. The screen printing balance coordination system according to claim 3, characterized in that, The laser detector is mounted on the frame of the machine base and is electrically connected in sequence to the main control circuit and the balance circuit master controller.

7. The screen printing balance coordination system according to claim 5, characterized in that, The rotating support column is connected to the rotating base, and the rotating support column is connected to the printing base. At least one printing base is provided. The rotation is controlled by rotating the rotating support column, which drives the printing base to perform mechanical movement in the same pattern.

8. The screen printing balance coordination system according to claim 3, characterized in that, The program controller controls the balance circuit master controller via a transmission control line. The balance circuit master controller controls the branch air pressure channel, the balance telescopic device air path, the balance telescopic device, the height change head, the printing table, and the laser detector via the main control electrical circuit.

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