A screen printing device with reduced silver paste consumption

Abstract

The present invention discloses a screen printing device for reducing silver paste consumption, comprising: a frame; a vibration component and a printing table; a leveling component; a screen component and a printing component, wherein the screen component includes a screen plate; the printing component includes a translation component and a squeegee component; the squeegee component includes a squeegee unit; the squeegee unit includes a roller and a roller sleeve; the translation component drives the squeegee assembly to reciprocate along the length of the screen plate; a movable component including a lifting unit and an elastic connection unit; and a docking component. The screen printing device for reducing silver paste consumption utilizes a rigid roller to support an elastic roller sleeve. The roller sleeve rotates about its own axis to squeeze silver paste through the mesh holes on the screen plate. This not only reduces wear on the screen plate but also ensures that the silver paste adheres to the battery cells after being pressed, thereby improving printing quality. The roller sleeve rotates to squeeze the paste adhered to its surface, reducing the amount of residual material, thereby fully utilizing the silver paste on the screen plate and reducing the amount of silver paste used.

Description

Technical Field

[0001] The present invention relates to the technical field of screen printing, in particular to a screen printing device that reduces silver paste consumption. Background Art

[0002] Screen printing is a crucial step in the solar cell production process. It creates delicate circuits on the front and back of the silicon wafer to conduct photogenerated electrons out of the cell. Screen printing utilizes the principle that the silver paste is permeable to the graphic portion of the plate, while the non-graphic portion is impermeable.

[0003] When the screen printing device in the prior art is in operation, silver paste is poured onto one side of the screen printing plate, and a scraper is used to apply pressure to the silver paste portion of the screen printing plate while simultaneously moving the device at a constant speed toward the other end of the screen printing plate. During this movement, the silver paste is squeezed through the mesh of the graphic portion of the screen printing plate by the scraper and onto the battery cell. During this printing process, the steel plate and the screen printing plate are in rigid contact, which makes the screen printing plate susceptible to wear. During printing, some silver paste easily remains on the scraper, making it impossible to fully squeeze the paste on the screen printing plate through the mesh and onto the battery cell. This increases the amount of silver paste used and thus printing costs. Furthermore, when the silver paste is squeezed through the mesh and onto the battery cell, the fixed and single direction of the scraper's extrusion force and the presence of air in the silver paste make it difficult for the silver paste to completely fill the mesh of the screen printing plate. This results in the presence of some tiny bubbles in the silver paste, which reduces the printing quality and, in turn, the quality of the battery cell.

[0004] Therefore, it is necessary to improve the screen printing device in the prior art. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects in the prior art and provide a screen printing device with reduced silver paste consumption, which reduces wear and tear, reduces printing costs and improves printing quality.

[0006] To achieve the above technical effects, the technical solution of the present invention is: a screen printing device that reduces silver paste consumption, comprising:

[0007] frame;

[0008] A vibration assembly and a printing table, wherein the vibration assembly is arranged on the frame and the output end is connected to the bottom surface of the printing table, and the top surface of the printing table is provided with a positioning member, which is used to fix the position of the battery cell on the printing table;

[0009] A leveling assembly, the leveling assembly being used to adjust the printing table to a horizontal angle;

[0010] A screen assembly and a printing assembly, wherein the screen assembly includes a screen plate disposed directly above the printing table, the printing assembly includes a translation assembly and a squeegee assembly, the squeegee assembly includes a squeegee unit, the squeegee unit includes a rigid roller and a coaxially fixed elastic roller sleeve disposed outside the roller, the roller and the roller sleeve both rotate around their own axis, the roller sleeve abuts against the top of the screen plate, and the translation assembly drives the squeegee assembly to reciprocate along the length direction of the screen plate;

[0011] A movable component, the movable component comprising a lifting unit and an elastic connection unit, the lifting unit being arranged on the frame, and an output end being connected to the wire mesh plate via the elastic connection unit;

[0012] The docking assembly is arranged between the screen plate and the printing table, and is used to adjust the position of the screen plate before the movable assembly drives the screen plate to abut against the printing table, so that the screen plate faces the battery cell.

[0013] Preferably, in order to drive the printing table to vibrate, the vibration assembly includes a vibrator and a support spring, the frame includes a base arranged directly below the printing table, the housing of the vibrator is fixed on the base and the output end is fixedly connected to the bottom surface of the printing table, and the support springs are evenly distributed between the base and the printing table.

[0014] Preferably, in order to facilitate the adjustment of the printing table to a horizontal angle position, the leveling assembly includes a telescopic unit arranged on the base, and a leveling guide rod and a leveling guide sleeve are provided between the telescopic unit and the printing table in a one-to-one corresponding and relatively arranged manner. The outer diameter of the leveling guide rod is consistent with the inner diameter of the leveling guide sleeve and the two extend in a direction approaching each other, and a leveling chamfer is provided at one end of the leveling guide rod adjacent to the leveling guide sleeve, and the end of the leveling guide sleeve adjacent to the leveling guide rod is flared.

[0015] Preferably, in order to achieve precise docking between the wire mesh plate and the battery cell, the docking assembly includes a docking guide rod and a docking guide sleeve that are corresponding to each other and relatively arranged. The docking guide rod and the docking guide sleeve extend in a direction approaching each other, and the end of the docking guide rod adjacent to the docking guide sleeve is provided with a docking chamfer, and the end of the docking guide sleeve adjacent to the docking guide rod is flared.

[0016] Preferably, in order to facilitate the relative movement between the output end of the lifting unit and the printing plate, the output end of the lifting unit includes a horizontal lifting plate, a movable through hole is provided on the lifting plate, and the elastic connection unit includes a connecting frame, a movable rod is provided on the connecting frame, which passes through the movable through hole and has a gap with the circumferential inner wall of the movable through hole, and a convex cover is provided on the top of the movable rod, and the connecting frame and the lifting plate are connected by a compression spring.

[0017] Preferably, in order to facilitate the disassembly, replacement and maintenance of the wire mesh plate, the translation assembly and the connecting frame are both detachably connected to the wire mesh plate.

[0018] Preferably, in order to improve printing quality, the scraper assembly includes at least two scraper units, and the scraper units are spaced apart along the width direction of the screen plate. The scraper units also include a rotating frame, and the roller rotates on the rotating frame around its own axis. The output end of the translation assembly includes a translation bar that moves along the length direction of the screen plate and extends along the width direction of the screen plate. The rotating frame rotates on the translation bar and the rotation axis is perpendicular to the length direction and width direction of the screen plate. A transmission assembly for driving the rotating frame to rotate is provided between the translation assembly and the scraper assembly.

[0019] Preferably, in order to further improve the printing quality, the axis lines of the rollers in two adjacent scraping units are at an angle and the scraping ranges of the two adjacent scraping units partially overlap.

[0020] Preferably, in order to achieve synchronous rotation of the rotating frames in each scraping unit, the transmission assembly includes a transmission wheel connected to the rotating frames one by one, the axis of the transmission wheel coincides with the rotation axis of the rotating frame, and adjacent transmission wheels are hinged by a connecting rod. The transmission assembly also includes a gear fixed on one of the transmission wheels coaxially and a rack meshing with the gear, and the length direction of the rack is consistent with the length direction of the wire mesh plate.

[0021] Preferably, in order to facilitate replacement and maintenance of the roller, the roller is detachably connected to the rotating frame.

[0022] In summary, compared with the prior art, the screen printing device of the present invention reduces the consumption of silver paste. The elastic roller sleeve is supported by a rigid roller, and the roller sleeve rotates around its own axis to squeeze the silver paste through the mesh holes on the screen plate. This not only reduces the wear of the screen plate, but also ensures that the silver paste adheres to the battery cell after being pressed, thereby improving the printing quality. The roller sleeve squeezes the paste attached to its surface through rotation, reducing the amount of residual material, thereby fully utilizing the silver paste on the screen plate and reducing the amount of silver paste used. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a structural diagram of the first embodiment;

[0024] Figure 2 yes Figure 1 Explosion diagram of

[0025] Figure 3 yes Figure 1 Schematic diagram of the cross-section structure;

[0026] Figure 4 is a schematic structural diagram of the active component of the first embodiment;

[0027] Figure 5 yes Figure 4 Explosion diagram of

[0028] Figure 6 is a schematic diagram of the connection structure of the screen assembly and the printing assembly in the first embodiment;

[0029] Figure 7 yes Figure 6 Explosion diagram of

[0030] Figure 8 yes Figure 1 Schematic diagram of part of the structure;

[0031] Figure 9 yes Figure 8 Explosion diagram of

[0032] Figure 10 yes Figure 9 Explosion diagram from another perspective;

[0033] Figure 11 is a structural diagram of the second embodiment;

[0034] Figure 12 2. It is a schematic diagram of the connection structure between the printing assembly and the screen assembly of the second embodiment;

[0035] Figure 13 yes Figure 12 Explosion diagram of

[0036] Figure 14 2 is a schematic structural diagram of a scraping unit according to a second embodiment;

[0037] Figure 15 yes Figure 14 Explosion diagram of

[0038] Figure 16 yes Figure 14 Schematic diagram of the cross-section structure;

[0039] In the figure: 1. frame; 11. base; 111. leveling sleeve; 12. support frame; 13. bottom frame; 2. vibration assembly; 21. vibrator; 22. support spring; 3. printing table; 31. positioning member; 32. leveling guide sleeve; 33. docking guide rod; 4. battery cell; 5. leveling assembly; 51. telescopic unit; 52. leveling guide rod; 53. moving frame; 6. screen assembly; 61. screen plate; 62. frame; 621. connecting seat; 63. docking guide sleeve; 64. guide rail; 7. translation assembly; 71. translation bar; 711. slideway; 72. translation motor; 73. screw rod; 74. support; 741. second bolt; 8. squeegee assembly; 81. squeegee unit; 82. roller Cylinder; 821, groove; 83, roller sleeve; 831, convex strip; 84, rotating frame; 85, transmission assembly; 851, transmission wheel; 852, connecting rod; 853, gear; 854, rack; 855, third bolt; 86, roller seat; 87, rotating shaft; 88, fourth bolt; 89, center tube; 891, inner convex ring; 9, movable assembly; 91, lifting unit; 911, lifting plate; 9111, movable through hole; 912, mounting frame; 913, lifting cylinder; 914, lifting guide rod; 915, lifting guide sleeve; 92, elastic connecting unit; 921, connecting frame; 922, movable rod; 923, convex cover; 924, compression spring; 925, first bolt; 926, nut. DETAILED DESCRIPTION

[0040] The following embodiments are further described in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0041] First embodiment

[0042] like Figures 1-10 As shown, the screen printing device for reducing silver paste consumption according to the first embodiment of the present invention includes:

[0043] Rack 1;

[0044] The vibration component 2 and the printing table 3 are provided on the frame 1, and the output end of the vibration component 2 is connected to the bottom surface of the printing table 3. The top surface of the printing table 3 is provided with a positioning member 31, which is used to fix the position of the battery cell 4 on the printing table 3;

[0045] A leveling assembly 5, which is used to adjust the printing table 3 to a horizontal angle;

[0046] The screen assembly 6 and the printing assembly include a screen plate 61 disposed directly above the printing table 3, a translation assembly 7 and a squeegee assembly 8, and the squeegee assembly 8 includes a squeegee unit 81. The squeegee unit 81 includes a rigid roller 82 and a coaxially fixed elastic roller sleeve 83 that is sleeved outside the roller 82. The roller 82 and the roller sleeve 83 both rotate around their own axis. The roller sleeve 83 abuts against the top of the screen plate 61. The translation assembly 7 drives the squeegee assembly 8 to reciprocate along the length direction of the screen plate 61.

[0047] The movable component 9 includes a lifting unit 91 and an elastic connection unit 92. The lifting unit 91 is arranged on the frame 1, and the output end is connected to the screen plate 61 through the elastic connection unit 92;

[0048] The docking assembly is arranged between the screen plate 61 and the printing table 3, and is used to adjust the position of the screen plate 61 before the movable assembly 9 drives the screen plate 61 to abut against the printing table 3, so that the screen plate 61 faces the battery cell 4.

[0049] When the device is used, first, the printing table 3 is adjusted to a horizontal angle by the leveling component 5, and then the battery cell 4 is placed on the printing table 3. After the position of the battery cell 4 on the printing table 3 is fixed by the positioning member 31, the movable component 9 is actuated, and the lifting unit 91 drives the screen plate 61 to move downward through the elastic connection unit 92. When the screen plate 61 is brought into contact with the battery cell 4 on the printing table 3 through the docking component, the screen plate 61 is directly above the battery cell 4, so that the screen plate 61 locks the battery cell 4 on the printing table 3, thereby realizing a relatively fixed connection between the screen plate 61, the battery cell 4 and the printing table 3; then, silver paste (hereinafter referred to as "silver paste") is injected onto the screen plate 61, and the squeegee component 8 is driven to move along the length direction of the printing table 3 by the translation component 7. In the squeegee unit 81 of the squeegee component 8, The rigid roller 82 supports the elastic roller sleeve 83, and the elastic roller sleeve 83 contacts the top surface of the screen plate 61. Through the elastic deformation of the roller sleeve 83 itself, the deformed part can enter the mesh of the screen plate 61, squeezing the silver paste out of the mesh while adhering to the top surface of the battery cell 4. After the leveling component 5 is removed from the connection with the printing table 3, the vibration component 2 is started to drive the printing table 3 and the battery cell 4 to vibrate. Through vibration, the silver paste and tiny bubbles in the mesh of the screen plate 61 are discharged. Then the leveling component 5 adjusts the printing table 3 to a horizontal state, and drives the scraping component 8 to move in the opposite direction through the translation component 7. After further squeezing the silver paste, the screen printing is completed, and then the elastic connection unit 92 and the screen plate 61 are moved upward by the lifting unit 91 to take out the printed battery cell 4.

[0050] During the printing process, the roller 82 and roller sleeve 83 rotate around their own axis, which reduces the wear of the screen plate 61 and extends the service life of the screen plate 61. The roller sleeve 83 is made of elastic material, preferably rubber or silicone. Through its own elastic deformation, the roller sleeve 83 can partially enter the mesh of the screen plate 61 during printing to squeeze the silver paste to promote the adhesion of the silver paste to the battery cell 4. In addition, since the roller sleeve 83 rotates around its own axis, the silver paste attached to the circumferential outer edge of the roller sleeve 83 can be squeezed into the mesh of the screen plate 61 again by the roller sleeve 83 after the roller sleeve 83 rotates. After entering the hole, it adheres to the battery cell 4, which improves the utilization rate of the silver paste, thereby reducing the amount of silver paste used, which is beneficial to reducing the cost of screen printing; not only that, the vibration component 2 drives the screen plate 61 to vibrate between the two previous printings, and the vibration method is beneficial to discharge the tiny bubbles in the mesh of the screen plate 61 and the silver paste, ensuring the filling rate of the mesh of the screen plate 61 with silver paste, thereby improving the quality of screen printing, and through two printings, the roller sleeve 83 applies pressure from different directions to ensure that the silver paste can pass through the mesh of the screen plate 61 and adhere to the battery cell 4, thereby improving the quality of screen printing.

[0051] A further improvement is that the vibration assembly 2 includes a vibrator 21 and a support spring 22, the frame 1 includes a base 11 arranged directly below the printing table 3, the housing of the vibrator 21 is fixed on the base 11 and the output end is fixedly connected to the bottom surface of the printing table 3, and the support springs 22 are evenly distributed between the base 11 and the printing table 3.

[0052] The vibrator 21 is preferably a high-frequency vibrator 21, whose housing is fixed above the base 11, and whose output end extends upward and is fixedly connected to the center of the bottom surface of the base 11. The vibrator 21 can drive the printing table 3 to vibrate, causing the screen plate 61 and the printing assembly, which are relatively locked and connected to the printing table 3, to vibrate. While vibrating, it facilitates the discharge of tiny bubbles in the mesh holes on the screen plate 61 and tiny bubbles in the silver paste, ensuring printing quality. It can also shake off the silver paste attached to the roller sleeve 83 onto the screen plate 61, making it easier for the roller sleeve 83 to squeeze the silver paste through the mesh holes of the screen plate 61 when the roller sleeve 83 rotates, so that it adheres to the battery cell 4, improving the utilization rate of the silver paste, thereby reducing silver paste loss and reducing silver paste costs. Four support springs 22 are provided in a circular array distributed outside the vibrator 21. The support springs 22 serve as a buffer and support for the printing table 3. At the same time, because the support springs 22 can be deformed, they facilitate the vibration of the printing table 3.

[0053] To be more specific, in this embodiment, the frame 1 includes a base 11, which is a cover-like structure with an open bottom, a bottom frame 13 is fixed to the inner side of the bottom of the base 11, and the side wall of the base 11 is connected to the lifting unit 91 through a support frame 12; the printing table 3 is a rectangular plate-like structure, and the top surface of the printing table 3 is provided with four L-shaped positioning members 31, and the four positioning members 31 enclose a rectangular positioning area, and the positioning area is adapted to the battery cell 4 and the thickness of the positioning member 31 is less than the thickness of the battery cell 4, so that it is convenient to confirm on the printing table 3. After determining the placement position of the battery cell 4 and placing the battery cell 4 between the four positioning members 31, the circumferential outer edge of the battery cell 4 is in contact with the inner side wall of the positioning member 31, and the top surface of the battery cell 4 is located above the side of the positioning member 31; in the screen assembly 6, the screen plate 61 is the screen printing plate, and when the screen plate 61 and the printing table 3 are locked and connected, the two are in the same length direction and the same width direction, and a rectangular frame 62 is provided on the top surface of the circumferential outer edge of the screen plate 61 so that the silver paste can be accommodated on the screen plate 61 to prevent the silver paste from falling from the periphery of the screen plate 61.

[0054] A further improvement is that the leveling assembly 5 includes a telescopic unit 51 arranged on the base 11, and a leveling guide rod 52 and a leveling guide sleeve 32 are arranged between the telescopic unit 51 and the printing table 3, which are corresponding and relatively arranged. The outer diameter of the leveling guide rod 52 is consistent with the inner diameter of the leveling guide sleeve 32 and the two extend in a direction approaching each other. The end of the leveling guide rod 52 adjacent to the leveling guide sleeve 32 is provided with a leveling chamfer, and the end of the leveling guide sleeve 32 adjacent to the leveling guide rod 52 is flared.

[0055] Specifically, the leveling assembly 5 also includes a horizontal movable frame 53. The movable frame 53 and the telescopic unit 51 are both arranged in the base 11. The telescopic unit 51 is an electric push rod, and its outer shell is fixed above the bottom frame 13 and is arranged upward in the plumb direction. The piston rod is fixedly connected to the middle of the movable frame 53. The four corners of the movable frame 53 are fixed with leveling guide rods 52 extending upward in the plumb direction. The top of the leveling guide rod 52 is provided with a leveling chamfer. Four leveling smooth sleeves 111 are also fixed to the top surface of the base 11. The four leveling smooth sleeves 111 correspond one-to-one to the four leveling guide rods 52 and slide together; the bottom surface of the printing table 3 is provided with a leveling guide sleeve 32 corresponding one-to-one to the four leveling guide rods 52. The bottom end of the leveling guide sleeve 32 is flared, and the inner diameter of the top is consistent with the outer diameter of the leveling guide rod 52.

[0056] After adopting the above structure, at the initial stage of equipment operation and after the vibration component 2 drives the printing table 3 to vibrate, the printing table 3 is slightly tilted relative to the horizontal plane, but the top ends of the four leveling guide sleeves 32 are arranged one by one directly above the top ends of the four leveling guide rods 52. At this time, the telescopic unit 51 controls the movable frame 53 to move upward. Under the guidance of the leveling sleeve 111, the four leveling guide rods 52 move upward steadily in the vertical direction, so that the four leveling guide rods 52 enter the four leveling guide sleeves 32 respectively. The leveling guide rods 52 continue to move upward. Since their outer diameter is consistent with the inner diameter of the leveling guide sleeve 32, the angular orientation of the leveling guide sleeve 32 can be changed until the four leveling guide rods 52 simultaneously abut against the top surface of the printing table 3. At this time, the printing table 3 is adjusted to a horizontal angular orientation.

[0057] A further improvement is that the docking assembly includes a docking guide rod 33 and a docking guide sleeve 63 that are corresponding to each other and relatively arranged. The docking guide rod 33 and the docking guide sleeve 63 extend in a direction approaching each other, and the end of the docking guide rod 33 adjacent to the docking guide sleeve 63 is provided with a docking chamfer, and the end of the docking guide sleeve 63 adjacent to the docking guide rod 33 is flared.

[0058] Specifically, on the top surface of the printing table 3, there are docking guide rods 33 extending upward on both sides of the rectangular positioning area, and the top of the docking guide rods 33 is provided with a docking chamfer to reduce the top size of the docking guide rods 33. In the screen assembly 6, there are docking guide sleeves 63 integrally connected to the two sides of the frame 62, which correspond to the two docking guide rods 33 one by one. The docking guide sleeves 63 extend downward, and the bottom end is flared to increase the bottom inner diameter of the docking guide sleeves 63. The upper inner diameter of the docking guide sleeves 63 is consistent with the lower outer diameter of the docking guide rods 33.

[0059] Since the lifting unit 91 is connected to the screen assembly 6 through the elastic connection unit 92, the elastic connection unit 92 can change its own shape, so that the screen assembly 6 and the lifting unit 91 are not completely fixedly connected. Therefore, after adopting the above structure, after the printing table 3 is leveled by the leveling component 5, the battery cell 4 is placed in the positioning area. At this time, the bottom end of the docking guide sleeve 63 is located directly above the top of the docking guide rod 33. The lifting unit 91 drives the screen plate 61 to move downward through the elastic connection unit 92, so that the docking guide sleeve 63 is sleeved on the outside of the docking guide rod 33. As the lifting unit 91 continues to operate, the circumferential inner wall of the upper part of the docking guide sleeve 63 is finally sealed and fitted with the circumferential outer edge of the lower part of the docking guide rod 33, thereby achieving precise docking between the screen plate 61 and the battery cell 4.

[0060] A further improvement is that the output end of the lifting unit 91 includes a horizontal lifting plate 911, which is provided with a movable through hole 9111, and the elastic connection unit 92 includes a connecting frame 921, on which is provided a movable rod 922 that passes through the movable through hole 9111 and has a gap with the circumferential inner wall of the movable through hole 9111, and a convex cover 923 is provided at the top of the movable rod 922, and the connecting frame 921 and the lifting plate 911 are connected by a compression spring 924.

[0061] Specifically, such as Figure 4 and Figure 5 As shown, the lifting unit 91 includes a mounting frame 912 fixedly connected to the support frame 12, and a lifting guide sleeve 915 extending in a vertical direction is integrally connected to the mounting frame 912. A lifting cylinder 913 is also provided on the mounting frame 912. The cylinder barrel of the lifting cylinder 913 is vertically downwardly arranged and fixedly connected to the mounting frame 912, and a horizontal lifting plate 911 is fixedly connected to the bottom end of the piston rod. The top surface of the lifting plate 911 is fixed with a lifting guide rod 914 extending upward in a vertical direction and slidingly cooperating with the lifting guide sleeve 915.

[0062] After adopting the above structure, the lifting cylinder 913 operates and acts on the lifting plate 911. Under the sliding cooperation of the lifting guide rod 914 and the lifting guide sleeve 915, the lifting plate 911 is stably lifted and moved in the vertical direction, thereby driving the height position of the elastic connection unit 92 and the wire mesh assembly 6 below to change.

[0063] The elastic connection unit 92 includes a connecting frame 921, the bottom end of the connecting frame 921 is connected to the frame 62, and the top surface is provided with four movable rods 922 extending upward, and the top of the movable rod 922 is provided with a convex cover 923. The outer sleeve of the movable rod 922 is provided with a compression spring 924, and the two ends of the compression spring 924 are respectively connected to the connecting frame 921 and the lifting plate 911. The lifting plate 911 is provided with movable through holes 9111 corresponding to the four movable rods 922. The inner diameter of the movable through hole 9111 is larger than the outer diameter of the movable rod 922 and smaller than the outer diameter of the convex cover 923, so that the movable rod 922 can pass through the inner side of the movable through hole 9111. There is a gap with the inner wall of the movable through hole 9111, and the convex cover 923 is used to prevent the movable rod 922 from separating from the lifting plate 911. In this way, the elastic connection unit 92 and the screen assembly 6 are conveniently lifted and lowered along with the operation of the lifting unit 91, and it can also meet the requirement that after the screen plate 61 abuts against the printing table 3, pressure is applied to the screen plate 61 by the compression spring 924 to ensure the locking connection strength between the screen plate 61 and the printing table 3. At the same time, through the loosely fitted movable rod 922 and the movable through hole 9111, the screen assembly 6 is convenient to vibrate synchronously with the printing table 3 after the vibration assembly 2 is started, and the vibration amplitude is limited by the convex cover 923.

[0064] A further improvement is that the translation assembly 7 and the connecting frame 921 are both detachably connected to the wire mesh plate 61.

[0065] The above design facilitates the disassembly and separation of the screen plate 61 from the translation assembly 7 and the connecting frame 921 , and allows for cleaning or replacement of the screen plate 61 and other maintenance operations.

[0066] Specifically, two connecting seats 621 are provided on both sides of the frame 62. The four corners of the connecting frame 921 correspond one-to-one with the four connecting seats 621 of the frame 62 and are detachably fixedly connected by four pairs of first bolts 925 and nuts 926 connected by threads.

[0067] The specific structure of the printed components is as follows Figure 6 and Figure 7 As shown, the translation assembly 7 includes supports 74 detachably fixed to the upper ends of the frame 62 by second bolts 741. The second bolts 741 are threadedly connected to the frame 62. A translation motor 72 is fixed to one of the supports 74. The output end of the translation motor 72 is coaxially fixedly connected to a screw rod 73. The axial direction of the screw rod 73 is parallel to the length direction of the screen plate 61. The screw rod 73 rotates around itself between the two supports 74. The screw rod 73 is threadedly connected to a translation bar 71. The translation bar 71 extends along the width direction of the screen plate 61. The two ends of the translation bar 71 are provided with slide grooves 711 extending along the length direction of the screen plate 61. Guide rails 64 extending along the length direction of the frame 62 are fixed above both sides of the frame 62. The guide rails 64 slide in a one-to-one correspondence with the slide grooves 711. The squeegee assembly 8 is arranged below the translation bar 71.

[0068] With the above structure, the second bolt 741 is threadedly connected to the frame 62, achieving a detachable connection between the support 74 and the frame 62, thereby achieving a detachable connection between the translation assembly 7, the squeegee assembly 8, and the screen assembly 6. When the translation assembly 7 is started, the translation motor 72 is activated, driving the screw 73 to rotate about its own axis between the two supports 74. Under the guidance of the guide rail 64, the translation bar 71 drives the squeegee assembly 8 to move smoothly along the length of the screen plate 61.

[0069] The squeegee assembly 8 includes a roller seat 86 fixed below the translation bar 71. Within the squeegee unit 81, a roller 82 rotates on the roller seat 86 about its own axis. The axis of the roller 82 is parallel to the width of the screen plate 61. A roller sleeve 83 is fixedly mounted on the outside of the roller 82. To strengthen the connection between the roller 82 and the sleeve 83, grooves 821 extending axially along the roller 82 are arranged in an annular array on the circumferential outer edge of the roller 82. Raised strips 831 extending axially along the sleeve 83 are arranged in an annular array on the circumferential inner wall of the sleeve 83. The grooves 821 correspond to and mate with the raised strips 831. This increases the contact area between the roller 82 and the sleeve 83, ensuring their synchronous rotation.

[0070] Second embodiment

[0071] like Figures 11-16 As shown, the screen printing device for reducing silver paste consumption according to the second embodiment of the present invention is based on the first embodiment, but the difference is that the scraper assembly 8 includes at least two scraper units 81, and the scraper units 81 are spaced apart along the width direction of the screen plate 61. The scraper units 81 also include a rotating frame 84, and the roller 82 rotates on the rotating frame 84 around its own axis. The output end of the translation assembly 7 includes a translation bar 71 that moves along the length direction of the screen plate 61 and extends along the width direction of the screen plate 61. The rotating frame 84 rotates on the translation bar 71 and the rotation axis is perpendicular to the length and width directions of the screen plate 61. A transmission assembly 85 for driving the rotating frame 84 to rotate is provided between the translation assembly 7 and the scraper assembly 8.

[0072] Specifically, in this embodiment, six scraping units 81 are provided and are evenly spaced along the length direction of the translation bar 71 . Of course, the number of scraping units 81 can also be set to other multiples.

[0073] After adopting this structure, when the translation component 7 is in operation, it acts on each scraping unit 81 of the scraping component 8 through the transmission component 85, so that in the scraping unit 81, the roller 82 and the roller sleeve 83 not only rotate around their own axis, but the rotating frame 84 itself also rotates, driving the horizontal axis of the roller 82 and the roller sleeve 83 to rotate with a certain plumb line as the center line, so that the roller sleeve 83 in contact with the silver paste and the screen plate 61 can apply pressure to the silver paste at different angles and positions, squeeze the silver paste into the mesh of the screen plate 61, and ensure the screen printing quality of the battery cell 4.

[0074] A further improvement is that the axis lines of the rollers 82 in two adjacent scraping units 81 are at an angle and the scraping ranges of the two adjacent scraping units 81 partially overlap.

[0075] Specifically, the axis lines of the rollers 82 in two adjacent scraper units 81 are perpendicular to each other, and there is an overlapping part in the moving paths of the rollers 82. In this way, it can avoid the rollers 82 from squeezing and colliding with each other when the two adjacent scraper units 81 rotate, and at the same time, expand the range of action of the rollers 82. For the overlapping part, during the operation of the translation component 7, pressure can be applied to the silver paste on both sides, further improving the quality of screen printing.

[0076] A further improvement is that the transmission assembly 85 includes a transmission wheel 851 connected one-to-one with the rotating frame 84, the axis of the transmission wheel 851 coincides with the rotation axis of the rotating frame 84, and the adjacent transmission wheels 851 are hinged by a connecting rod 852. The transmission assembly 85 also includes a gear 853 fixed on one of the transmission wheels 851 coaxially and a rack 854 meshing with the gear 853, and the length direction of the rack 854 is consistent with the length direction of the wire mesh plate 61.

[0077] Specifically, the length direction of the rack 854 is consistent with the length direction of the screen plate 61, and the two ends of the rack 854 are fixed to the top of the frame 62 by the third bolt 855. The gear 853 is annular, and its circumferential inner wall is fixedly connected to the circumferential outer edge of one of the transmission wheels 851 at the end; in the scraping unit 81, the rotating frame 84 is attached to the bottom of the translation bar 71, and a rotating shaft 87 is fixed on its top that is sealed and passes through the translation bar 71 in the vertical direction. The top surface of the rotating shaft 87 is flush with the top surface of the translation bar 71, and the rotating shaft 87 is fixedly connected to the transmission wheel 851 coaxially.

[0078] After adopting the above structure, when the translation assembly 7 drives the translation bar 71 to move along the length direction of the screen plate 61, the gear 853 rolls along the rack 854 while driving the transmission wheel 851 at the end to rotate, and acts on other transmission wheels 851 through the connecting rod 852, so that each transmission wheel 851 rotates synchronously, and then drives the rotating frame 84 under the transmission wheel 851 to rotate, so that the roller 82 and the roller sleeve 83 rotate. There are two directions of rotation. One is to rotate around its own axis, and the other is to rotate with the axis of the rotating shaft 87 as the center line, which is convenient for applying pressure from different angles and directions to squeeze the silver paste through the mesh of the screen plate 61 and act on the battery cell 4.

[0079] A further improvement is that the roller 82 is detachably connected to the rotating frame 84. Adopting this design, it is convenient to carry out maintenance operations such as replacement and cleaning of the roller 82 and the roller sleeve 83.

[0080] Specifically, such as Figure 14-16 As shown, the roller 82 is a tubular structure, and a center tube 89 is sealed and penetrated on the inner side coaxially. An inner convex ring 891 is provided on the inner wall of the center tube 89 near both ends. The two ends of the center tube 89 are threadedly connected with a fourth bolt 88. The fourth bolt 88 is penetrated through the end of the rotating frame 84 and abuts against the inner convex ring 891. The part of the rod of the fourth bolt 88 penetrated through the end of the rotating frame 84 is a smooth cylindrical shape. In this way, the detachable connection between the roller 82, the roller sleeve 83 and the rotating frame 84 is realized. At the same time, it is convenient for the roller 82 and the roller sleeve 83 to rotate around their own axis, and the rotating frame 84 can rotate with the axis of the rotating shaft 87 as the center line.

[0081] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A screen printing device for reducing silver paste consumption, characterized in that: include: Rack (1); A vibration component (2) and a printing table (3), wherein the vibration component (2) is arranged on the frame (1) and the output end is connected to the bottom surface of the printing table (3), and the top surface of the printing table (3) is provided with a positioning member (31), and the positioning member (31) is used to fix the position of the battery cell (4) on the printing table (3); A leveling component (5), the leveling component (5) being used to adjust the printing table (3) to a horizontal angle; A screen assembly (6) and a printing assembly, wherein the screen assembly (6) includes a screen plate (61) arranged directly above the printing table (3), the printing assembly includes a translation assembly (7) and a scraping assembly (8), the scraping assembly (8) includes a scraping unit (81), the scraping unit (81) includes a rigid roller (82) and a roller sleeve (83) coaxially fixedly sleeved outside the roller (82) and elastic, the roller (82) and the roller sleeve (83) both rotate around their own axis, the roller sleeve (83) abuts against the top of the screen plate (61), and the translation assembly (7) drives the scraping assembly (8) to reciprocate along the length direction of the screen plate (61); A movable component (9), the movable component (9) comprising a lifting unit (91) and an elastic connection unit (92), the lifting unit (91) being arranged on the frame (1), and an output end being connected to the wire mesh plate (61) via the elastic connection unit (92); a docking assembly, the docking assembly being arranged between the screen plate (61) and the printing table (3), and being used for adjusting the position of the screen plate (61) before the movable assembly (9) drives the screen plate (61) to abut against the printing table (3), so that the screen plate (61) faces the battery cell (4); The vibration assembly (2) includes a vibrator (21) and a support spring (22), the frame (1) includes a base (11) arranged directly below the printing table (3), the housing of the vibrator (21) is fixed on the base (11) and the output end is fixedly connected to the bottom surface of the printing table (3), and the support spring (22) is evenly distributed between the base (11) and the printing table (3); The leveling assembly (5) comprises a telescopic unit (51) arranged on the base (11), a leveling guide rod (52) and a leveling guide sleeve (32) corresponding to each other and arranged opposite to each other are arranged between the telescopic unit (51) and the printing table (3), the outer diameter of the leveling guide rod (52) is consistent with the inner diameter of the leveling guide sleeve (32), and the two extend in a direction approaching each other, the end of the leveling guide rod (52) adjacent to the leveling guide sleeve (32) is provided with a leveling chamfer, and the end of the leveling guide sleeve (32) adjacent to the leveling guide rod (52) is flared; The docking assembly comprises a docking guide rod (33) and a docking guide sleeve (63) which are arranged in a one-to-one correspondence and opposite to each other, wherein the docking guide rod (33) and the docking guide sleeve (63) extend in a direction approaching each other, and an end of the docking guide rod (33) adjacent to the docking guide sleeve (63) is provided with a docking chamfer, and an end of the docking guide sleeve (63) adjacent to the docking guide rod (33) is flared; The vibration component starts, driving the printing table and the battery cell to vibrate, and through vibration, the tiny bubbles in the silver paste and the mesh of the screen are discharged.

2. The screen printing device for reducing silver paste consumption according to claim 1, characterized in that: The output end of the lifting unit (91) includes a horizontal lifting plate (911), the lifting plate (911) is provided with a movable through hole (9111), the elastic connection unit (92) includes a connecting frame (921), the connecting frame (921) is provided with a movable rod (922) that passes through the movable through hole (9111) and has a gap with the circumferential inner wall of the movable through hole (9111), the top end of the movable rod (922) is provided with a convex cover (923), and the connecting frame (921) and the lifting plate (911) are connected by a compression spring (924).

3. The screen printing device for reducing silver paste consumption according to claim 2, characterized in that: The translation assembly (7) and the connecting frame (921) are both detachably connected to the wire mesh plate (61).

4. The screen printing device for reducing silver paste consumption according to claim 1, characterized in that: The scraping assembly (8) includes at least two scraping units (81), and the scraping units (81) are spaced apart along the width direction of the screen plate (61). The scraping units (81) also include a rotating frame (84), and the roller (82) rotates on the rotating frame (84) around its own axis. The output end of the translation assembly (7) includes a translation bar (71) that moves along the length direction of the screen plate (61) and extends along the width direction of the screen plate (61). The rotating frame (84) rotates on the translation bar (71) and the rotation axis is perpendicular to the length direction and width direction of the screen plate (61). A transmission assembly (85) for driving the rotating frame (84) to rotate is provided between the translation assembly (7) and the scraping assembly (8).

5. The screen printing device for reducing silver paste consumption according to claim 4, characterized in that: There is an angle between the axis lines of the rollers (82) in two adjacent scraping units (81), and the scraping ranges of the two adjacent scraping units (81) partially overlap.

6. The screen printing device for reducing silver paste consumption according to claim 4, characterized in that: The transmission assembly (85) includes a transmission wheel (851) connected to the rotating frame (84) in a one-to-one correspondence, the axis of the transmission wheel (851) coincides with the rotation axis of the rotating frame (84), and adjacent transmission wheels (851) are hinged via a connecting rod (852). The transmission assembly (85) also includes a gear (853) fixed to one of the transmission wheels (851) coaxially and a rack (854) meshed with the gear (853), and the length direction of the rack (854) is consistent with the length direction of the wire mesh plate (61).

7. The screen printing device for reducing silver paste consumption according to claim 4, characterized in that: The roller (82) is detachably connected to the rotating frame (84).

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