Printing assembly and printing device

Abstract

The utility model provides a printing assembly and a printing device. The printing assembly comprises a mounting plate, a first lifting part, a second lifting part, a voice coil motor, a scraper module and an ink returning knife module. The first lifting part and the second lifting part are mounted on the mounting plate; the voice coil motor is connected to a movable part of the first lifting part, the scraper module is connected with the driving end of the voice coil motor, and when the scraper module is driven by the first lifting part to make contact with the screen printing plate assembly, the voice coil motor presses the scraper module on the screen printing plate assembly with constant pressure. The ink reclaiming knife module is connected to a movable part of the second lifting part, and the ink reclaiming knife module is driven by the second lifting part to descend to the low position to be close to the screen printing plate assembly. Due to the fact that the first lifting part and the scraper module are connected through the voice coil motor, when the scraper module is in contact with the screen printing plate assembly, the voice coil motor elastically presses the scraper module on the screen printing plate with constant pressure, and therefore it is ensured that the scraper module prints printing paste on a material piece with constant scraping and printing force, and the printing consistency is improved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic cell module production equipment, and specifically to a printing module and a printing device. Background Art

[0002] In the screen printing process of battery chips, it is necessary to control the vertical descent of the squeegee to contact the screen plate module for scraping, so as to form metal grid lines on the surface of the battery chip. In order to ensure the elastic contact between the squeegee and the screen plate module, a cylinder is also arranged between the squeegee and the driving end of the lifting driver. When the squeegee contacts the screen plate module, the cylinder continuously presses down the squeegee, so that the squeegee elastically abuts against the screen plate module.

[0003] However, there is a small amount of fluctuation in the air pressure inside the cylinder. Therefore, it is impossible to accurately press down the squeegee with a constant pressure, resulting in a large fluctuation in the scraping force of the squeegee, and ultimately poor consistency of the printed grid lines. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a squeegee, which adopts the following technical solutions:

[0005] A printing module, including a mounting plate, a first lifting part, a second lifting part, a voice coil motor, a squeegee module and an ink return knife module, wherein:

[0006] The first lifting part and the second lifting part are mounted on the mounting plate;

[0007] The voice coil motor is connected to the moving part of the first lifting part, the squeegee module is connected to the driving end of the voice coil motor, the first lifting part is configured to drive the squeegee module to lift, when the squeegee module descends to the low position, it contacts the screen plate module, and the voice coil motor is configured to press the squeegee module against the screen plate module with a constant pressure;

[0008] The ink return knife module is connected to the moving part of the second lifting part, the second lifting part is configured to drive the ink return knife module to lift, and when the ink return knife module descends to the low position, it approaches the screen plate module.

[0009] In the printing module provided by the present application, the first lifting part that drives the squeegee module to lift is connected to the squeegee module through a voice coil motor. When the first lifting part drives the squeegee module to descend so that the squeegee module contacts the screen plate module, the voice coil motor elastically presses the squeegee module against the screen plate with a constant pressure, thereby ensuring that the squeegee module can print the printing paste onto the wafer with a constant scraping force, and improving the printing consistency.

[0010] In some embodiments, the first lifting part includes a first motor, a first lead screw module, and a sliding plate, where: the sliding plate is connected to the mounting plate in a liftable and slidable manner and is drivingly connected to the first motor disposed on the mounting plate through the first lead screw module, and the voice coil motor is mounted on the sliding plate; the first motor is configured to drive the sliding plate to lift and slide so as to drive the voice coil motor and the squeegee module to lift and lower.

[0011] The first lifting part is composed of a first motor, a first lead screw module drive, and a sliding plate, which on the one hand provides sufficient mounting space for the voice coil motor and the squeegee module, and on the other hand ensures that the voice coil motor and the squeegee module can achieve stable lifting and lowering.

[0012] In some embodiments, the squeegee module includes a drive plate, at least one squeegee mounting bracket, and at least one squeegee, where: the drive plate is connected to the sliding plate in a liftable and slidable manner, the drive plate is connected to the drive end of the voice coil motor, and at least one squeegee mounting bracket is connected to the lower end of the drive plate; at least one squeegee is mounted on the squeegee mounting bracket.

[0013] By setting the squeegee module to include a drive plate, a squeegee mounting bracket, and a squeegee, it is ensured that the squeegee module forms a stable connection with the sliding plate.

[0014] In some embodiments, at least one squeegee mounting bracket is rotatably connected to the lower end of the drive plate through a rotating shaft.

[0015] Since the squeegee mounting bracket is rotatably connected to the lower end of the drive plate through a rotating shaft, when the first lifting part drives the squeegee module to descend in place, the squeegee mounting bracket completes adaptive rotation under the action of its own gravity and / or the acting force of the screen plate assembly, so as to ensure that the blade edge of the squeegee forms full contact with the screen plate assembly.

[0016] In some embodiments, first baffle plates are provided at both ends of the squeegee mounting bracket, and the squeegee is located between the two first baffle plates.

[0017] By providing first baffle plates at both ends of the squeegee mounting bracket, the printing paste located in the moving direction of the squeegee is gathered, preventing the printing paste from being driven outside the moving range of the squeegee.

[0018] In some embodiments, the second lifting part includes a second motor and a second lead screw module, and the ink return knife module includes a connecting plate and an ink return knife, where: the connecting plate is drivingly connected to the second motor through the second lead screw module; the ink return knife is mounted on the connecting plate.

[0019] The second lifting part is composed of a second motor and a second lead screw module, ensuring that the second lifting part can achieve precise and stable lifting drive for the ink return knife.

[0020] In some embodiments, second baffle plates are formed at both ends of the ink return knife.

[0021] By arranging second baffle plates at both ends of the ink return blade, the collection of the printing paste located in the moving direction of the ink return blade is achieved, preventing the printing paste from being driven outside the moving range of the ink return blade.

[0022] The present application also provides a printing device, which includes a mounting base, a moving module, a screen printing component and the printing component described in any one of the above. Among them: the moving module is arranged on the mounting base, the printing component is slidably connected to the mounting base and connected to the moving part of the moving module; the screen printing component is arranged on the mounting base and is located below the printing component; the moving module is configured to drive the printing component abutting against the screen printing component to reciprocally translate along the screen printing component, so as to print the printing paste through the screen printing component onto the workpiece.

[0023] Through the cooperation of the screen printing component and the printing component, the printing device realizes the scraping printing of the workpiece. In particular, during the scraping printing process, the squeegee module is elastically pressed against the screen printing component under the action of the voice coil motor with a constant pressure, so as to ensure that the squeegee module can print the printing paste onto the workpiece with a constant scraping force, improving the printing consistency.

[0024] In some embodiments, the screen printing component includes a screen printing mounting frame, a screen printing plate and a screen printing adjusting member. Among them: both the screen printing mounting frame and the screen printing adjusting member are mounted on the mounting base, and the screen printing mounting frame is in transmission connection with the screen printing adjusting member; the screen printing plate is detachably mounted on the screen printing mounting frame; the screen printing adjusting member is configured to drive the screen printing mounting frame to translate and rotate on the horizontal plane, so as to adjust the position and angle of the screen printing plate.

[0025] The automatic adjustment of the position and angle of the screen printing plate is realized, so as to ensure that the printing area on the screen printing plate can be aligned with the workpiece to be printed.

[0026] In some embodiments, a first printing area and a second printing area with the same aperture arrangement are arranged at intervals on the screen printing plate. The printing component is configured to print the printing paste through the first printing area onto the first workpiece and print the printing paste through the second printing area onto the second workpiece within one printing cycle.

[0027] So that the printing component performs one scraping printing, and the synchronous printing of two battery wafers can be completed, improving the printing efficiency. Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of the printing component in the embodiment of the present application;

[0029] Figure 2 It is a schematic structural diagram of the printing component in the embodiment of the present application after omitting components such as the first lifting part, the voice coil motor and the squeegee module;

[0030] Figure 3Schematic diagram of the structure of the printing device in the embodiments of the present application.

[0031] Figures 1 to 3 It includes:

[0032] Printing assembly 10:

[0033] Mounting plate 1;

[0034] First lifting part 2: first motor 21, first lead screw module 22, sliding plate 23;

[0035] Second lifting part 3: second motor 31, second lead screw module 32;

[0036] Voice coil motor 4;

[0037] Doctor blade module 5: drive plate 51, doctor blade mounting bracket 52, doctor blade 53, rotating shaft 54, first baffle plate 55, first slide rail 56;

[0038] Ink return blade module 6: connecting plate 61, ink return blade 62, second baffle plate 63;

[0039] Mounting seat 20: second slide rail 201;

[0040] Moving module 30;

[0041] Screen printing plate assembly 40. Detailed implementation manners

[0042] To make the above objects, features and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0043] As Figures 1 to 2 shown, the printing assembly 10 in the embodiments of the present application includes a mounting plate 1, a first lifting part 2, a second lifting part 3, a voice coil motor 4, a doctor blade module 5 and an ink return blade module 6, wherein:

[0044] The first lifting part 2 and the second lifting part 3 are mounted on the mounting plate 1.

[0045] The voice coil motor 4 is connected to the moving part of the first lifting part 2, the doctor blade module 5 is connected to the driving end of the voice coil motor 4, the first lifting part 2 is configured to drive the doctor blade module 5 to lift, when the doctor blade module 5 descends to the low position, it contacts the screen printing plate assembly, and the voice coil motor 4 is configured to press the doctor blade module 5 against the screen printing plate assembly with a constant pressure.

[0046] The ink return blade module 6 is connected to the moving part of the second lifting part 3, the second lifting part 3 is configured to drive the ink return blade module 6 to lift, and when the ink return blade module descends to the low position, it approaches the screen printing plate assembly.

[0047] The printing assembly in the embodiment of the present application is connected to the scraper module 5 via a voice coil motor 4 by a first lifting part 2 that drives the scraper module 5 to rise and fall. When the first lifting part 2 drives the scraper module 5 to descend so that the scraper module 5 contacts the screen assembly, the voice coil motor 4 elastically presses the scraper module 5 against the screen assembly with a constant pressure, thereby ensuring that the scraper module 5 can print the printing slurry onto the material sheet with a constant scraping force, thereby improving printing consistency.

[0048] The voice coil motor is a commonly used constant force output device, and the value of the driving force it outputs is proportional to the current applied to the coil. Therefore, in the embodiment of the present application, it is only necessary to ensure that the current applied to the coil of the voice coil motor remains constant, so that the voice coil motor can elastically press the scraper module onto the screen assembly with a constant pressure. The specific structure and working principle of the voice coil motor are well known to those skilled in the art, and for the sake of brevity, they will not be repeated here.

[0049] Optionally, the first lifting part 2 and the second lifting part 3 are arranged side by side on the mounting plate 1. In this way, the installation space can be saved, making the structure of the printing assembly in the embodiment of the present application more compact. More specifically, the first lifting part 2 and the second lifting part 3 are arranged in sequence along the extension direction of the blade of the scraper 53, which can effectively reduce the space occupied.

[0050] Optionally, the first lifting part 2 includes a first motor 21, a first screw module 22 and a slide plate 23, wherein: the slide plate 23 is connected to the mounting plate 1 in a lifting and sliding manner, and is connected to the first motor 21 arranged on the mounting plate 1 through the first screw module 22, and the voice coil motor 4 is installed on the slide plate 23. The first motor 21 is configured to drive the slide plate 23 to lift and slide along the mounting plate 1, thereby driving the voice coil motor 4 and the scraper module 5 to lift and lower.

[0051] The screw drive structure composed of the first motor 21 and the first screw module 22 can ensure the lifting stability of the voice coil motor 4 and the scraper module 5, and can ensure the lifting stroke of the scraper module 5. Of course, other existing linear drive modules can also be used to drive the slide plate 23 to lift and slide along the mounting plate 1, such as a cylinder drive module composed of a cylinder, a slide rail and a slider.

[0052] Optionally, the scraper module 5 includes a driving plate 51, a scraper mounting frame 52 and a scraper 53, wherein: the driving plate 51 is connected to the slide plate 23 in a lifting and sliding manner, for example, the driving plate 51 is slidably connected to the slide plate 23 through a first slide rail 56 arranged along the vertical direction on the slide plate 23. The driving plate 51 is connected to the driving end of the voice coil motor 4, and the scraper mounting frame 52 is connected to the lower end of the driving plate 51. The scraper 53 is mounted on the scraper mounting frame 52.

[0053] Optionally, the squeegee mounting bracket 52 is rotatably connected to the lower end of the driving plate 51 via a rotating shaft 54. In this way, when the first lifting part 2 drives the squeegee module 5 to reach the in-place position, the squeegee mounting bracket 52 completes self-adaptive rotation under the action of its own gravity and / or the acting force of the screen printing plate assembly, so as to ensure that the blade of the squeegee 53 is in full contact with the screen printing plate assembly, preventing the screen printing plate from being quickly worn out and scrapped or the screen printing quality from decreasing due to angle errors.

[0054] Similarly optionally, when the screen printing plate has two identical printing areas, in order to make the squeegee fit the wire mesh more evenly during screen printing, two squeegees and two squeegee mounting brackets can be provided, that is: the blades of the two squeegees extend along the same straight line, the two squeegees are respectively installed at the lower ends of the two squeegee mounting brackets, and the two squeegee mounting brackets are respectively rotatably installed at the lower end of the same driving plate via two rotating shafts.

[0055] As Figure 1 shown, optionally, first baffle plates 55 are provided at both ends of the squeegee mounting bracket 52, and the squeegee 53 is located between the two first baffle plates 55. By providing the first baffle plates 55 at both ends of the squeegee mounting bracket 52, the printing paste located in the moving direction of the squeegee 53 is collected, preventing the printing paste from being driven outside the moving range of the squeegee.

[0056] As Figures 1 to 2 shown, optionally, the second lifting part 3 includes a second motor 31 and a second lead screw module 32, and the ink return knife module 6 includes a connecting plate 61 and an ink return knife 62, wherein: the connecting plate 61 is in transmission connection with the second motor 31 via the second lead screw module 32. The ink return knife 62 is installed on the connecting plate 61.

[0057] The lead screw driving structure composed of the second motor 31 and the second lead screw module 32 can ensure the lifting stability of the ink return knife module 6 and can increase the lifting stroke of the ink return knife module 6. Of course, other existing linear driving structures can also be used to drive the ink return knife module 6 to lift, such as a cylinder driving module composed of a cylinder, a slide rail and a slider.

[0058] Optionally, second baffle plates 63 are formed at both ends of the ink return knife 62, and the second baffle plates 63 collect the printing paste located in the moving direction of the ink return knife 62, preventing the printing paste from being driven outside the moving range of the ink return knife, thereby improving the ink return effect of the ink return knife 62 and improving the effective utilization of the printing paste.

[0059] The present application also provides a printing device, as Figure 3 shown, the printing device in the embodiment of the present application includes a mounting base 20, a moving module 30, a screen printing plate assembly 40 and the printing assembly 10 in any of the above embodiments, wherein:

[0060] The moving module 30 is arranged on the mounting base 20, and the printing assembly 10 is slidably connected to the mounting base 20 and connected to the moving part of the moving module 30. For example, a second slide rail 201 is arranged on the mounting base 20, and the printing assembly 10 is slidably connected to the mounting base 20 via the second slide rail 201. The moving module 30 drives the printing assembly 10 to slide along the second slide rail 201. The moving module 30 can adopt various existing linear drive modules that can drive the printing assembly 10 to slide along the second slide rail 201.

[0061] The stencil assembly 40 is arranged on the mounting base 20 and is located below the printing assembly 10. The moving module 20 is configured to drive the printing assembly 10 that abuts against the stencil assembly 40 to reciprocate horizontally along the stencil assembly 40 to print the printing paste through the stencil assembly 40 onto the wafer.

[0062] The working process of the printing device in the embodiment of the present application is as follows:

[0063] In the initial state, the printing assembly 10 is located at the first end (such as the left end) of the stencil assembly 40, and both the squeegee module 5 and the doctor blade module 6 are at a high position away from the stencil assembly 40.

[0064] The first lifting part 2 drives the squeegee module 5 to the low position, so that the squeegee module 5 is elastically pressed against the stencil assembly 40 with a constant pressure under the drive of the voice coil motor 4 (at this time, a uniform paste layer has been coated on the stencil). The doctor blade module 6 remains at the high position.

[0065] Then, the moving module 30 drives the printing assembly 10 to translate to the second end (such as the right end) of the stencil assembly 40. During this process, the squeegee module 5 prints the printing paste onto the wafer that is closely attached to the stencil assembly 40 below the stencil assembly 40 with a constant squeegee force.

[0066] At this point, the printing of the first stroke is completed, and a printing paste pile is formed between the squeegee module 5 and the doctor blade module 6.

[0067] Subsequently, the first lifting part 2 drives the squeegee module 5 to the high position, so that the squeegee module 5 is separated from the stencil assembly 40. At the same time, the second lifting part 3 drives the doctor blade module 6 to the low position, so that a predetermined ink return gap is formed between the doctor blade module 6 and the stencil assembly 40.

[0068] Then, the moving module 30 drives the printing assembly 10 to translate back to the first end (such as the left end) of the stencil assembly 40. During this process, the doctor blade module 6 performs an ink return action, so that the printing paste is filled into the mesh holes of the stencil assembly 40 and a uniform paste coating is formed.

[0069] At this time, the printing of the next stroke can be carried out.

[0070] Through the cooperation of the screen printing component 40 and the printing component 10, the printing device in the embodiment of the present application realizes the squeegee printing of the sheet. In particular, during the squeegee printing process, the squeegee module 5 is elastically pressed against the screen printing component 40 with a constant pressure under the action of the voice coil motor 4, so as to ensure that the squeegee module 5 can print the printing paste onto the sheet with a constant squeegee printing force, improving the printing consistency. The printing device in the embodiment of the present application is suitable for printing sheets such as battery wafers.

[0071] Optionally, the screen printing component 40 includes a screen mounting frame, a screen, and a screen adjusting member, where: both the screen mounting frame and the screen adjusting member are mounted on the mounting seat 1, and the screen mounting frame is in transmission connection with the screen adjusting member; the screen is detachably mounted on the screen mounting frame. The screen adjusting member is configured to drive the screen mounting frame to translate and rotate on the horizontal plane to adjust the position and angle of the screen. The squeegee module 5 is elastically pressed against the screen with a constant pressure under the action of the voice coil motor 4, and the printing material is squeegee printed onto the sheet through the screen. Before implementing the squeegee printing of the sheet, the position and angle of the screen are automatically adjusted through the screen adjusting member, so as to ensure that the printing area on the screen can be aligned with the sheet to be printed.

[0072] Optionally, the screen adjusting member can be a conventional UVW component to achieve the horizontal axial adjustment of the screen, that is, including two axially perpendicular to each other within the horizontal plane and another axial for rotation within the horizontal plane. Generally speaking, the screen adjusting member includes 3 servo motors, 3 sets of lead screw modules (the lead screw module at least includes a lead screw bracket, a lead screw rotatably mounted at both ends on the lead screw bracket, and a lead screw nut slidably mounted on the lead screw), a cross rail, and a rotating shaft. Each servo motor is in transmission connection with a lead screw module, a cross rail is mounted on the driving end (lead screw nut) of the lead screw module, and the other end of the cross rail is rotatably connected to a certain position of the screen mounting frame through a rotating shaft. With such a setting, the translation and rotation of the screen within the horizontal plane can be controlled by controlling 3 servo motors to achieve printing alignment and complete precise printing.

[0073] Optionally, a first printing area and a second printing area with the same aperture arrangement are spaced on the screen, and the printing component 10 is configured to print the printing paste onto the first sheet through the first printing area and print the printing paste onto the second sheet through the second printing area within one printing cycle. That is to say, each time the printing component 10 performs a squeegee printing, it can complete the synchronous printing of two sheets, improving the printing efficiency.

[0074] The above description of the present application is detailed enough and has a certain particularity. Those of ordinary skill in the art should understand that the description in the embodiments is only exemplary, and all changes made without departing from the true spirit and scope of the present application should fall within the protection scope of the present application. The scope of protection required by the present application is defined by the claims described, rather than by the above description in the embodiments.

Claims

1. A printing assembly, characterized in that: The printing assembly includes a mounting plate, a first lifting part, a second lifting part, a voice coil motor, a scraper module and an ink return knife module, wherein: The first lifting part and the second lifting part are mounted on the mounting plate; The voice coil motor is connected to the movable part of the first lifting part, the scraper module is connected to the driving end of the voice coil motor, the first lifting part is configured to drive the scraper module to move up and down, the scraper module contacts the screen assembly when it descends to a low position, and the voice coil motor is configured to press the scraper module onto the screen assembly with a constant pressure; The ink return knife module is connected to the movable component of the second lifting part, and the second lifting part is configured to drive the ink return knife module to rise and fall. When the ink return knife module descends to a low position, it is close to the screen assembly.

2. The printing assembly according to claim 1, characterized in that The first lifting part includes a first motor, a first screw module and a slide plate, wherein: The slide plate is connected to the mounting plate in a lifting and sliding manner, and is transmission-connected to the first motor arranged on the mounting plate through the first screw module, and the voice coil motor is mounted on the slide plate; The first motor is configured to drive the slide plate to rise and fall and slide, so as to drive the voice coil motor and the scraper module to rise and fall.

3. The printing assembly according to claim 2, characterized in that The scraper module comprises a driving plate, at least one scraper mounting frame and at least one scraper, wherein: The driving plate is connected to the slide plate in a lifting and sliding manner, the driving plate is connected to the driving end of the voice coil motor, and the at least one scraper mounting frame is connected to the lower end of the driving plate; The at least one scraper is mounted on the scraper mounting frame.

4. The printing assembly according to claim 3, characterized in that The at least one scraper mounting bracket is rotatably connected to the lower end of the driving plate via a rotating shaft.

5. The printing assembly according to claim 3, characterized in that Both ends of the scraper mounting frame are provided with first material baffle plates, and the scraper is located between the two first material baffle plates.

6. The printing assembly according to claim 1, characterized in that The second lifting part includes a second motor and a second screw rod module, and the ink return knife module includes a connecting plate and an ink return knife, wherein: The connecting plate is transmission-connected to the second motor via the second screw module; The ink return knife is installed on the connecting plate.

7. The printing assembly according to claim 6, characterized in that: The two ends of the ink return knife are formed with second material blocking plates.

8. A printing device, characterized in that: The printing device comprises a mounting seat, a movable module, a screen assembly and a printing assembly according to any one of claims 1 to 7, wherein: The movable module is arranged on the mounting seat, and the printing assembly is slidably connected to the mounting seat and connected to the movable part of the movable module; The screen assembly is arranged on the mounting seat and is located below the printing assembly; The moving module is configured to drive the printing assembly resting on the screen assembly to move back and forth along the screen assembly, so as to print the printing paste through the screen assembly onto the web.

9. The printing device according to claim 8, characterized in that The screen assembly includes a screen mounting frame, a screen and a screen adjusting member, wherein: The screen mounting frame and the screen adjusting member are both mounted on the mounting seat, and the screen mounting frame is in transmission connection with the screen adjusting member; The screen is detachably mounted on the screen mounting frame; The screen adjustment member is configured to drive the screen mounting frame to translate and rotate on a horizontal plane to adjust the position and angle of the screen.

10. The printing device according to claim 9, characterized in that The screen is provided with a first printing area and a second printing area having the same hole arrangement, and the printing component is configured to print the printing paste onto the first material sheet through the first printing area and print the printing paste onto the second material sheet through the second printing area in one printing cycle.

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