Silk-screen printing device capable of reducing silver paste consumption

Abstract

The invention discloses a silk-screen printing device capable of reducing silver paste consumption. The silk-screen printing device comprises a rack; a vibration assembly and a printing table; a leveling assembly; the silk screen assembly comprises a silk screen plate, the printing assembly comprises a translation assembly and a paste scraping assembly, the paste scraping assembly comprises a paste scraping unit, the paste scraping unit comprises a roller and a roller sleeve, and the translation assembly drives the paste scraping assembly to reciprocate in the length direction of the silk screen plate; the movable assembly comprises a lifting unit and an elastic connecting unit; and a butt joint assembly. According to the silk-screen printing device capable of reducing silver paste consumption, the elastic roller sleeve is supported through the rigid roller, silver paste is extruded to penetrate through meshes in the silk-screen plate through the roller sleeve rotating around the axis of the roller sleeve, abrasion of the silk-screen plate is reduced, it is guaranteed that the silver paste is attached to a battery piece after being pressed, the printing quality is improved, and the printing efficiency is improved. The roller sleeve extrudes slurry attached to the surface of the roller sleeve through rotation, the residual amount is reduced, and therefore silver slurry on the silk screen plate can be fully used, and the use amount of the silver slurry is reduced.

Description

Technical Field

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

[0002] Screen printing is a crucial step in the production process of solar cells. It mainly creates fine circuits on the front and back of the silicon wafer to guide the photogenerated electrons out of the battery. When screen printing, the silver paste is allowed to pass through the mesh of the graphic part of the thinking printing plate, while the silver paste cannot pass through the mesh of the non-graphic part.

[0003] When the screen printing device in the prior art is in operation, silver paste is poured on one side of the screen printing plate, and pressure is applied to the silver paste part of the screen printing plate with a scraper, while the screen printing plate moves at a uniform speed toward the other end of the screen printing plate. During the movement, the silver paste is squeezed from the mesh of the graphic part to the battery cell by the scraper. In the above printing process, the steel plate is in rigid contact with the screen printing plate, which makes the screen printing plate easy to be worn, and when printing, part of the silver paste is easy to remain on the scraper, resulting in the inability to fully squeeze the paste on the screen printing plate through the mesh onto the battery cell, increasing the amount of silver paste used, thereby increasing the printing cost; not only that, when the silver paste is squeezed onto the battery cell through the mesh, due to the fixed single direction of the scraper extrusion force and the mixing of some air in the silver paste, it is difficult for the silver paste to completely fill the mesh on the screen printing plate, resulting in the presence of some tiny bubbles in the silver paste, which reduces the printing quality and thus reduces 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] In order to achieve the above technical effects, the technical solution of the present invention is: a screen printing device for reducing silver paste consumption, comprising: frame; A vibration component and a printing table, wherein the vibration component is arranged on the frame and the output end is connected to the bottom surface of the printing table, and a positioning member is arranged on the top surface of the printing table, and the positioning member is used to fix the position of the battery cell placed on the printing table; A leveling assembly, the leveling assembly is used to adjust the printing table to a horizontal angle; A screen assembly and a printing assembly, wherein the screen assembly comprises a screen plate disposed directly above the printing table, the printing assembly comprises a translation assembly and a squeegee assembly, the squeegee assembly comprises a squeegee unit, the squeegee unit comprises a rigid roller and a roller sleeve coaxially fixedly sleeved outside the roller and being elastic, 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; A movable component, the movable component comprises a lifting unit and an elastic connection unit, the lifting unit is arranged on the frame, and the output end is connected to the wire mesh plate through the elastic connection unit; A 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 sheet.

[0007] 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 spring is evenly distributed between the base and the printing table.

[0008] 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 arranged 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, the end of the leveling guide rod adjacent to the leveling guide sleeve is provided with a leveling chamfer, and the end of the leveling guide sleeve adjacent to the leveling guide rod is flared.

[0009] 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, and 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.

[0010] 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 arranged on the lifting plate, the elastic connection unit includes a connecting frame, a movable rod is arranged 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, a convex cover is arranged on the top of the movable rod, and the connecting frame and the lifting plate are connected by a compression spring.

[0011] 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.

[0012] 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 and the roller both rotate around their own axes on the rotating frame. 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 arranged between the translation assembly and the scraper assembly.

[0013] Preferably, in order to further improve the printing quality, the axis lines of the rollers in two adjacent scraper units are at an angle and the scraping ranges of the two adjacent scraper units partially overlap.

[0014] Preferably, in order to realize the synchronous rotation of the rotating frames in each scraper 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.

[0015] Preferably, in order to facilitate replacement and maintenance of the roller, the roller is detachably connected to the rotating frame.

[0016] In summary, compared with the prior art, the screen printing device for reducing silver paste consumption of the present invention supports an elastic roller sleeve through a rigid roller, and utilizes the roller sleeve rotating around its own axis to squeeze the silver paste through the mesh holes on the screen plate, which 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 by rotating, 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

[0017] Figure 1 is a schematic structural diagram of the first embodiment; Figure 2 yes Figure 1 Explosion diagram of Figure 3 yes Figure 1 A schematic diagram of the cross-sectional structure of; Figure 4 is a schematic diagram of the structure of the active component of the first embodiment; Figure 5 yes Figure 4 Explosion diagram of Figure 6 is a schematic diagram of the connection structure of the screen assembly and the printing assembly of the first embodiment; Figure 7 yes Figure 6 Explosion diagram of Figure 8 yes Figure 1 A partial structural diagram of Fig. 9 yes Figure 8 Explosion diagram of Fig.10 yes Fig. 9 Schematic diagram of the explosion from another perspective; Fig.11 is a schematic structural diagram of a second embodiment; Fig.12 is a schematic diagram of the connection structure between the printing assembly and the screen assembly of the second embodiment; Fig.13 yes Fig.12 Explosion diagram of Fig.14 is a schematic structural diagram of a scraping unit according to a second embodiment; Fig.15 yes Fig.14 Explosion diagram of Fig.16 yes Fig.14 A schematic diagram of the cross-sectional structure of; 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 piece; 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, lead screw; 74, support; 741, second bolt; 8, scraping assembly; 81, scraping 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

[0018] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0019] First embodiment

[0020] like Figure 1-Figure 10 As shown, the screen printing device for reducing silver paste consumption according to the first embodiment of the present invention comprises: 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 a positioning member 31 is arranged on the top surface of the printing table 3, and the positioning member 31 is used to fix the position of the battery cell 4 placed on the printing table 3; A leveling component 5, the leveling component 5 is used to adjust the printing table 3 to a horizontal angle; The screen assembly 6 and the printing assembly, the screen assembly 6 includes a screen plate 61 arranged just above the printing table 3, the printing assembly includes a translation assembly 7 and a squeegee assembly 8, the squeegee assembly 8 includes a squeegee unit 81, the squeegee 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 squeegee assembly 8 to reciprocate along the length direction of the screen plate 61; 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 wire mesh plate 61 through the elastic connection unit 92; 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.

[0021] When the device is used, the printing table 3 is first 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 in contact with the battery cell 4 on the printing table 3 through the docking component, the screen plate 61 is directly opposite to the top of the battery cell 4, so that the screen plate 61 locks the battery cell 4 on the printing table 3, and the screen plate 61 is relatively fixedly connected with 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, squeeze the silver paste out of the mesh and adhere to the top surface of the battery cell 4. After the leveling component 5 is disconnected from 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 scraper 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.

[0022] During the printing process, the roller 82 and the roller sleeve 83 rotate around their own axis, which reduces the wear of the screen plate 61 and prolongs the service life of the screen plate 61. The roller sleeve 83 is made of an 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 silver paste to adhere 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 by the roller sleeve 83 again 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.

[0023] 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.

[0024] The vibrator 21 preferably adopts a high-frequency vibrator 21, whose housing is fixed above the base 11, and the output end extends upward and is fixedly connected to the bottom center of the base 11. The vibrator 21 can drive the printing table 3 to vibrate, so that the screen plate 61 and the printing assembly that are relatively locked and connected to the printing table 3 vibrate. While vibrating, it is convenient to discharge the tiny bubbles in the mesh holes on the screen plate 61 and the tiny bubbles in the silver paste to ensure the printing quality, and it can also shake the silver paste attached to the roller sleeve 83 onto the screen plate 61, so that when the roller sleeve 83 rotates, the silver paste is squeezed through the mesh holes of the screen plate 61, so that it is attached to the battery cell 4, improving the utilization rate of the silver paste, thereby reducing the loss of the silver paste and reducing the silver paste. There are four support springs 22, which are distributed in a circular array outside the vibrator 21. The support springs 22 play a role of buffering and supporting the printing table 3. At the same time, because the support springs 22 can be deformed, it is convenient for the vibration of the printing table 3.

[0025] 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 The placement position of the battery cell 4 is determined. After the battery cell 4 is placed between the four positioning members 31, the circumferential outer edge of the battery cell 4 is in contact with the inner wall of the positioning members 31, and the top surface of the battery cell 4 is located above the side of the positioning members 31; in the screen assembly 6, the screen plate 61 is the screen printing plate. 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. A rectangular frame 62 is provided on the top surface of the circumferential outer edge of the screen plate 61 so that the screen plate 61 can accommodate silver paste to prevent the silver paste from falling from the periphery of the screen plate 61.

[0026] 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, and a one-to-one corresponding and relatively arranged leveling guide rod 52 and a leveling guide sleeve 32 are 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, and a leveling chamfer is provided at one end of the leveling guide rod 52 adjacent to the leveling guide sleeve 32, and the end of the leveling guide sleeve 32 adjacent to the leveling guide rod 52 is flared.

[0027] 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 on the top of the base 13 and is arranged upward in the plumb direction. The piston rod is fixedly connected to the middle of the movable frame 53. Leveling guide rods 52 extending upward in the plumb direction are fixed at the four corners of the movable frame 53. 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 to the four leveling guide rods 52 one by one and slide together; the bottom surface of the printing table 3 is provided with leveling guide sleeves 32 corresponding to the four leveling guide rods 52 one by one. The bottom end of the leveling guide sleeve 32 is flared, and the inner diameter of the top end is consistent with the outer diameter of the leveling guide rod 52.

[0028] 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, and under the guidance of the leveling smooth sleeve 111, the four leveling guide rods 52 move upward stably in the vertical direction, so that the four leveling guide rods 52 enter the four leveling guide sleeves 32 respectively, and the leveling guide rods 52 continue to move upward. Since their outer diameters are consistent with the inner diameters of the leveling guide sleeves 32, the angular orientation of the leveling guide sleeves 32 can be changed until the four leveling guide rods 52 are simultaneously in contact with the top surface of the printing table 3. At this time, the printing table 3 is adjusted to a horizontal angular orientation.

[0029] 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, 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.

[0030] Specifically, on the top surface of the printing table 3, the two sides of the rectangular positioning area are provided with upwardly extending docking guide rods 33, and the top ends of the docking guide rods 33 are provided with docking chamfers to reduce the top size of the docking guide rods 33. In the screen assembly 6, on both sides of the frame 62, there are integrally connected docking guide sleeves 63 corresponding to the two docking guide rods 33. The docking guide sleeves 63 extend downward, and the bottom ends are 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.

[0031] Since the lifting unit 91 is connected to the screen assembly 6 through the elastic connecting unit 92, the elastic connecting 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 end of the docking guide rod 33, and the lifting unit 91 drives the screen plate 61 to move downward through the elastic connecting 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 realizing the precise docking of the screen plate 61 and the battery cell 4.

[0032] A further improvement is 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 penetrates the movable through hole 9111 and has a gap with the circumferential inner wall of the movable through hole 9111, 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.

[0033] Specifically, 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, and a lifting guide rod 914 is fixed on the top surface of the lifting plate 911, which extends upward in the vertical direction and slidably cooperates with the lifting guide sleeve 915.

[0034] 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 elastic connection unit 92 and the wire mesh assembly 6 below to change their height position.

[0035] 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, and 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 be inserted into the inner side of the movable through hole 9111, and its outer wall 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 detaching from the lifting plate 911. In this way, the elastic connection unit 92 and the screen assembly 6 can be lifted and moved along with the operation of the lifting unit 91, and the screen plate 61 can be abutted against the printing table 3 by using the compression spring 924 to apply pressure to the screen plate 61 to ensure the locking connection strength between the screen plate 61 and the printing table 3. At the same time, through the loosely fitting movable rod 922 and the movable through hole 9111, the screen assembly 6 can 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.

[0036] A further improvement is that the translation assembly 7 and the connecting frame 921 are both detachably connected to the wire mesh plate 61 .

[0037] Through the above design, it is convenient to disassemble and separate the screen plate 61 from the translation assembly 7 and the connecting frame 921, and to perform other maintenance operations such as cleaning or replacement of the screen plate 61.

[0038] Specifically, two connection seats 621 are provided on both sides of the frame 62. The four corners of the connection frame 921 correspond one-to-one to the four connection seats 621 of the frame 62 and are detachably fixedly connected by four pairs of first bolts 925 and nuts 926 connected by threads.

[0039] The specific structure of the printed component is as follows Figure 6 and Figure 7 As shown, the translation assembly 7 includes a support 74 detachably fixed to the upper ends of the frame 62 by a second bolt 741, the second bolt 741 is threadedly connected to the frame 62, a translation motor 72 is fixed on one of the supports 74, the output end of the translation motor 72 is coaxially fixedly connected with 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 with a translation bar 71, the translation bar 71 extends along the width direction of the screen plate 61, and the two ends of the translation bar 71 are provided with a slide groove 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 the two sides of the frame 62, and the guide rails 64 slide in a one-to-one correspondence with the slide groove 711. The squeegee assembly 8 is arranged below the translation bar 71.

[0040] After adopting the above structure, the second bolt 741 is threadedly connected to the frame 62 to realize the detachable connection between the support 74 and the frame 62, thereby realizing the detachable connection between the translation assembly 7, the scraper assembly 8 and the screen assembly 6. When the translation assembly 7 is started, the translation motor 72 is started to drive the screw rod 73 to rotate around its own axis between the two supports 74. Under the guidance of the guide rail 64, the translation bar 71 drives the scraper assembly 8 to move smoothly along the length direction of the screen plate 61.

[0041] The squeegee assembly 8 includes a roller seat 86 fixed below the translation bar 71. In the squeegee unit 81, the roller 82 rotates on the roller seat 86 around its own axis. The axis of the roller 82 is parallel to the width direction of the screen plate 61. The roller sleeve 83 is fixed outside the roller 82. In order to strengthen the connection strength between the roller 82 and the roller sleeve 83, the circumferential outer edge of the roller 82 is provided with an annular array of grooves 821 extending along the axial direction of the roller 82. The circumferential inner wall of the roller sleeve 83 is provided with an annular array of convex strips 831 extending along the axial direction of the roller sleeve 83. The grooves 821 correspond to the convex strips 831 one by one and are matched. In this way, the contact area between the roller 82 and the roller sleeve 83 is increased, and the synchronous rotation of the two is ensured.

[0042] Second embodiment

[0043] like Figure 11-Figure 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, with the difference 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, and the scraper units 81 also include a rotating frame 84, and the rollers 82 and the rollers 82 both rotate on the rotating frame 84 around their own axes, and the output end of the translation assembly 7 includes a translation bar 71 which moves along the length direction of the screen plate 61 and extends along the width direction of the screen plate 61, and 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, and a transmission assembly 85 for driving the rotating frame 84 to rotate is arranged between the translation assembly 7 and the scraper assembly 8.

[0044] Specifically, in the present embodiment, six scraper units 81 are provided and are evenly spaced along the length direction of the translation strip 71 . Of course, the number of scraper units 81 may also be set to another plurality.

[0045] After adopting this structure, when the translation component 7 is in operation, it acts on each scraper unit 81 of the scraper component 8 through the transmission component 85, so that in the scraper 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.

[0046] A further improvement is that the axis lines of the rollers 82 in two adjacent scraping units 81 have an angle and the scraping ranges of the two adjacent scraping units 81 partially overlap.

[0047] Specifically, the axis lines of the rollers 82 in two adjacent scraper units 81 are perpendicular to each other, and there is an overlapping portion in the movable paths of the rollers 82. This 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 portion, during the operation of the translation assembly 7, pressure can be applied to the silver paste on both sides to further improve the quality of screen printing.

[0048] A further improvement is 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 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.

[0049] 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 bolts 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 scraper unit 81, the rotating frame 84 is attached to the bottom of the translation bar 71, and a rotating shaft 87 is fixed on the top of the rotating frame 84, which 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.

[0050] 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, so as to facilitate pressure from different angles and directions, and squeeze the silver paste through the mesh holes of the screen plate 61 to act on the battery cell 4.

[0051] A further improvement is that the roller 82 is detachably connected to the rotating frame 84. This design facilitates maintenance operations such as replacement and cleaning of the roller 82 and the roller sleeve 83.

[0052] Specifically, 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 portion of the fourth bolt 88 rod 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 achieved. 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.

[0053] 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 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 an output end is connected to the bottom surface of the printing table (3), and a positioning member (31) is arranged on the top surface of the printing table (3), and the positioning member (31) is used to fix the position of the battery cell (4) placed 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) comprises a screen plate (61) arranged directly above the printing table (3), the printing assembly comprises a translation assembly (7) and a squeegee assembly (8), the squeegee assembly (8) comprises a squeegee unit (81), the squeegee unit (81) comprises 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 squeegee 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 the 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 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).

2. The screen printing device for reducing silver paste consumption according to claim 1, characterized in that: The vibration assembly (2) comprises a vibrator (21) and a support spring (22); the frame (1) comprises a base (11) arranged directly below the printing table (3); a housing of the vibrator (21) is fixed on the base (11) and an 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).

3. The screen printing device for reducing silver paste consumption according to claim 2, characterized in that: 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) are arranged between the telescopic unit (51) and the printing table (3) in a one-to-one correspondence and opposite arrangement; 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; a leveling chamfer is arranged at one end of the leveling guide rod (52) adjacent to the leveling guide sleeve (32); and a flared shape is arranged at one end of the leveling guide sleeve (32) adjacent to the leveling guide rod (52).

4. The screen printing device for reducing silver paste consumption according to claim 1, characterized in that: 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, the docking guide rod (33) and the docking guide sleeve (63) extending in a direction approaching each other, one end of the docking guide rod (33) adjacent to the docking guide sleeve (63) being provided with a docking chamfer, and one end of the docking guide sleeve (63) adjacent to the docking guide rod (33) being in a flared shape.

5. The screen printing device for reducing silver paste consumption according to claim 1, characterized in that: The output end of the lifting unit (91) comprises a horizontal lifting plate (911), the lifting plate (911) is provided with a movable through hole (9111), the elastic connection unit (92) comprises 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 via a compression spring (924).

6. The screen printing device for reducing silver paste consumption according to claim 5, characterized in that: The translation assembly (7) and the connecting frame (921) are both detachably connected to the wire mesh plate (61).

7. The screen printing device for reducing silver paste consumption according to claim 1, characterized in that: The scraper assembly (8) comprises at least two scraper units (81), wherein the scraper units (81) are spaced apart along the width direction of the screen plate (61), and the scraper units (81) further comprise a rotating frame (84), wherein the roller (82) and the roller (82) both rotate on the rotating frame (84) around their own axes, and the output end of the translation assembly (7) comprises a translation bar (71) which moves along the length direction of the screen plate (61) and extends along the width direction of the screen plate (61), and the rotating frame (84) rotates on the translation bar (71) and the rotation axis is perpendicular to the length direction and the width direction of the screen plate (61), and a transmission assembly (85) for driving the rotating frame (84) to rotate is arranged between the translation assembly (7) and the scraper assembly (8).

8. The screen printing device for reducing silver paste consumption according to claim 7, characterized in 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.

9. The screen printing device for reducing silver paste consumption according to claim 7, characterized in that: The transmission assembly (85) comprises transmission wheels (851) connected to the rotating frame (84) in a one-to-one correspondence, the axis of the transmission wheels (851) coincides with the rotation axis of the rotating frame (84), and adjacent transmission wheels (851) are hingedly connected via connecting rods (852). The transmission assembly (85) further comprises a gear (853) coaxially fixed to one of the transmission wheels (851) 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).

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

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