Battery double-sided printing device

Abstract

The invention discloses a battery double-sided printing device, including a base, a turntable, a front screen printer, a back screen printer, a first drying mechanism and a second drying mechanism. The turntable is installed on the base, and the base is provided with loading and unloading stations, a front printing station, a first drying station, a flipping station, a back printing station and a second drying station in sequence around the turntable. The front screen printer is installed on the front printing station, the back screen printer is installed on the back printing station, the first drying mechanism is installed on the first drying station, the second drying mechanism is installed on the second drying station, and a plurality of silicon wafer clamping and flipping mechanisms are provided on the turntable. The battery double-sided printing device of the invention has the advantages of accurate positioning, high printing efficiency, compact structure, etc., silicon wafers do not need to be frequently transferred, the damage caused by the bumps and corners of silicon wafers is reduced, the silicon wafers are more accurately positioned, and the screen printing accuracy of the battery is significantly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of screen printing, and in particular relates to a battery double-sided printing device. Background Art

[0002] Both the front and back sides of bifacial crystalline silicon solar cells can absorb light energy, which can significantly improve the photoelectric conversion efficiency of solar cells. During the production process of bifacial crystalline silicon solar cells, electrodes need to be brushed on the front and back sides of the cells using screen printing technology. Existing screen printing technology is carried out on a conveyor belt. In order to print on both sides of the cell, it is necessary to frequently use a robot to move the silicon wafer, which is prone to inaccurate positioning of the silicon wafer, resulting in reduced printing accuracy and increased defective product rate. Summary of the invention

[0003] In order to solve the above technical problems, the technical solution adopted by the present invention is: a battery double-sided printing device, including a base, a turntable, a front screen printer, a back screen printer, a first drying mechanism and a second drying mechanism. The turntable is rotatably installed on the base through motor control, and the base is provided with loading and unloading stations, a front printing station, a first drying station, a flipping station, a back printing station, and a second drying station in sequence and evenly spaced around the turntable. The front screen printer is installed on the front printing station, the back screen printer is installed on the back printing station, the first drying mechanism is installed on the first drying station, and the second drying mechanism is installed on the second drying station. The turntable is provided with a number of silicon wafer clamping and flipping mechanisms evenly spaced.

[0004] As a preferred embodiment of the above technical solution, the silicon wafer clamping and flipping mechanism includes a flipping mouth opened on a turntable, a flipping frame is arranged in the flipping mouth, two ends of the flipping frame are rotatably installed in the flipping mouth through rotating shafts, and the flipping frame is controlled to flip by a flipping motor that drives one of the rotating shafts to rotate, and two lower limit bars arranged in parallel are respectively arranged on both sides of the inside of the flip frame, and upper limit bars are respectively arranged above the lower limit bars, and the two ends of the lower limit bar are respectively connected to the two ends of the flip frame, one end of the upper limit bar is connected to one end of the flip frame, and a clearance mouth is formed between the other end and the other end of the flip frame.

[0005] As a preferred embodiment of the above technical solution, a plurality of positioning holes are respectively provided on both sides of the flip frame, a plurality of positioning pins are installed on the turntable, the positioning pins correspond to the positioning holes, and the positioning pins are driven by cylinders to be inserted into the corresponding positioning holes.

[0006] As a preferred embodiment of the above technical solution, one of the positioning holes is set as a limiting hole, and a limiting plate is connected to the positioning pin corresponding to the positioning hole. The limiting hole is connected to the inner side of the flip frame and is located between the upper limiting strip and the lower limiting strip. One end of the limiting plate is fixedly connected to the positioning pin, and the other end passes through the limiting hole and extends into the flip frame.

[0007] As a preferred embodiment of the above technical solution, the front screen printing machine is installed on the first slide, and the back screen printing machine is installed on the second slide. The first slide and the second slide have the same structure, and a slide rail is provided on the base. The first slide and the second slide are respectively installed on the slide rail. A first bidirectional screw rod driven to rotate by a mobile motor is installed on the base, and a first forward nut and a first reverse nut are provided on the first bidirectional screw rod. The first forward nut is fixedly connected to the first slide, and the first reverse nut is fixedly connected to the second slide.

[0008] As a preferred embodiment of the above technical solution, the first drying mechanism and the second drying mechanism have the same structure, wherein the first drying mechanism includes an upper box cover, a lower box cover and a mounting plate, a second bidirectional screw rod driven to rotate by a lifting motor is mounted on the mounting plate, a second bidirectional screw rod is provided with a second forward nut and a second reverse nut, an upper mounting frame is connected to the outer side of the upper box cover, the upper mounting frame is fixedly connected to the second forward nut, a lower mounting frame is connected to the outer side of the lower box cover, the lower mounting frame is fixedly connected to the second reverse nut, the upper box cover covers the flip opening from above the turntable, the lower box cover covers the flip opening from below the turntable, an air outlet pipe is connected to the upper box cover, and a heating device is installed in the lower box cover.

[0009] As a preferred embodiment of the above technical solution, the mounting plate of the first drying mechanism is fixedly connected to the first slide, and the mounting plate of the second drying mechanism is fixedly connected to the second slide.

[0010] As a preferred embodiment of the above technical solution, the turntable is in the shape of a regular hexagon, and two sides of the first slide are respectively provided with positioning angles for two adjacent corners of the turntable of the regular hexagon to be inserted into.

[0011] As a preferred embodiment of the above technical solution, the front screen printing machine and the back screen printing machine have the same structure, wherein the front screen printing machine includes a scraper assembly, a horizontal movement driving mechanism for driving the scraper assembly to move horizontally back and forth, and a vertical movement driving mechanism for driving the scraper assembly to move vertically back and forth.

[0012] As a preferred embodiment of the above technical solution, the horizontal movement driving mechanism includes a first screw rod arranged horizontally, a first motor driving the first screw rod to rotate, a first guide rod arranged on both sides of the first screw rod, and a horizontal movement block movably mounted on the first guide rod, the screw rod pair of the first screw rod is fixedly connected to the horizontal movement block, and the scraper assembly is mounted on the horizontal movement block, and the vertical movement driving mechanism includes a second screw rod arranged vertically, a second motor driving the second screw rod to rotate, a second guide rod arranged on both sides of the second screw rod, and a lifting frame movably mounted on the second guide rod, the screw rod pair of the second screw rod is fixedly connected to the lifting frame, and the first screw rod and the first guide rod are mounted on the lifting frame.

[0013] The beneficial effects of the present invention are as follows: the battery double-sided printing device of the present invention has the advantages of precise positioning, high printing efficiency, compact structure, etc., silicon wafers do not need to be frequently transferred, the damage to the corners of the silicon wafers is reduced, the positioning of the silicon wafers is more accurate, and compared with the existing method of printing by transporting silicon wafers through a conveyor belt, the screen printing accuracy of the battery is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the structure of the turntable;

[0016] Figure 3 This is a schematic diagram of the structure of the turntable from another angle;

[0017] Figure 4 It is a schematic diagram of the structure of a front screen printing machine. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] like Figure 1-4As shown, a battery double-sided printing device includes a base 1, a turntable 2, a front screen printer 3, a back screen printer 4, a first drying mechanism 5 and a second drying mechanism 6. The turntable 2 is rotatably installed on the base 1 through motor control, and the base 1 is provided with loading and unloading stations 7, a front printing station 8, a first drying station 9, a flipping station 10, a back printing station 11, and a second drying station 12 in sequence and evenly spaced around the turntable 2. The front screen printer 3 is installed on the front printing station 8, the back screen printer 4 is installed on the back printing station 11, the first drying mechanism 5 is installed on the first drying station 9, and the second drying mechanism 6 is installed on the second drying station 12. The turntable 2 is provided with a plurality of silicon wafer clamping and flipping mechanisms 13 evenly spaced. The silicon wafer to be printed is loaded at the loading and unloading station 7, so that the silicon wafer is fixed on the silicon wafer clamping and flipping mechanism 13. By rotating the turntable 2, the silicon wafer is sequentially passed through the front screen printer 3 for front screen printing, dried by the first drying mechanism 5, flipped at the flipping station 10 so that the back of the silicon wafer faces upward, passed through the back screen printer 4 for back screen printing, dried by the second drying mechanism 6, and unloaded at the loading and unloading station 7. The front screen printer 3, the back screen printer 4, the first drying mechanism 5 and the second drying mechanism 6 simultaneously perform corresponding operations on the silicon wafers of different silicon wafer clamping and flipping mechanisms 13, and the loading and unloading station 7 unloads first and then loads. In this way, the utilization rate of each device is improved. During the process of front printing, drying, flipping, back printing and drying again, there is no need to use a robot to move the position of the silicon wafer, and there is no need to reposition the silicon wafer, thereby ensuring the printing accuracy of the silicon wafer.

[0022] Furthermore, the silicon wafer clamping and flipping mechanism 13 includes a flipping opening 14 opened on the turntable 2, a flipping frame 15 is arranged in the flipping opening 14, and the two ends of the flipping frame 15 are rotatably installed in the flipping opening 14 through a rotating shaft 16. The flipping frame 15 is controlled to flip by a flipping motor 17 that drives one of the rotating shafts 16 to rotate. Two lower limit bars 18 arranged in parallel are arranged on both sides of the interior of the flipping frame 15, and upper limit bars 19 are arranged above the lower limit bars 18. The two ends of the lower limit bars 18 are connected to the two ends of the flipping frame 15, and one end of the upper limit bar 19 is connected to one end of the flipping frame 15, and a clearance opening 20 is formed between the other end and the other end of the flipping frame 15. The silicon wafer is placed in the flipping frame 15 from the clearance opening 20, and the two ends of the silicon wafer are placed on the lower limit bar 18, respectively. The silicon wafer is moved horizontally so that the two sides of the silicon wafer are inserted between the lower limit bar 18 and the upper limit bar 19. In order to better protect the silicon wafer, elastic rubber strips are installed on the upper surface of the lower limit bar 18 and the lower surface of the upper limit bar 19 respectively, and the lower surface of one end of the upper limit bar 19 close to the yield opening 20 is an inclined surface 21, so that the side edge of the silicon wafer can be accurately and smoothly inserted between the lower limit bar 18 and the upper limit bar 19.

[0023] Furthermore, a plurality of positioning holes 22 are respectively provided on both sides of the flip frame 15, and a plurality of positioning pins 23 are installed on the turntable 2, the positioning pins 23 correspond to the positioning holes 22, and the positioning pins 23 are driven by the cylinder 24 to be inserted into the corresponding positioning holes 22. After the flip frame 15 is flipped, the positioning pins 23 and the positioning holes 22 ensure the horizontal state of the flip frame 15 after flipping, so that the flip frame 15 is more stable during the screen printing process, ensuring the printing accuracy. In order to facilitate the insertion of the positioning pins 23 into the positioning holes 22, the end of the positioning holes 22 is designed to be trumpet-shaped. When the flip frame 15 needs to be flipped, the positioning pins 23 withdraw from the positioning holes 22, and after the flip frame 15 is flipped, the positioning pins 23 are inserted into the positioning holes 22 on the other side of the flip frame 15.

[0024] Further, one of the positioning holes 22 is set as a limiting hole 25, and a limiting plate 26 is connected to the positioning pin 23 corresponding to the positioning hole 22. The limiting hole 26 is connected to the inner side of the flip frame 15 and is located between the upper limiting strip 19 and the lower limiting strip 18. One end of the limiting plate 26 is fixedly connected to the positioning pin 23, and the other end passes through the limiting hole 25 and extends into the flip frame 15. The limiting plate 26 prevents the silicon wafer from sliding, so that the silicon wafer positioning is more accurate.

[0025] Furthermore, the front screen printer 3 is mounted on the first slide 27, and the back screen printer 4 is mounted on the second slide 28. The first slide 27 and the second slide 28 have the same structure. The base 1 is provided with a slide rail 29, and the first slide 27 and the second slide 28 are respectively mounted on the slide rail 29. The base 1 is provided with a first bidirectional screw 31 driven to rotate by a mobile motor 30. The first bidirectional screw 31 is provided with a first forward nut and a first reverse nut. The first forward nut is fixedly connected to the first slide 27, and the first reverse nut is fixedly connected to the second slide 28. The first bidirectional screw 31 rotates forward, so that the first slide 27 and the second slide 28 move toward each other, so that the front screen printer 3 moves to the front printing station 8, and the back screen printer 3 moves to the back printing station 11. The first bidirectional screw 31 is reversed, so that the first slide 27 and the second slide 28 move away from each other in opposite directions, the front screen printer 3 moves away from the front printing station 8, and the back screen printer 3 moves away from the back printing station 11, without affecting the rotation of the turntable 2. After the next silicon wafer clamping and flipping mechanism 13 rotates to the corresponding position, the first bidirectional screw 31 rotates forward again.

[0026] Furthermore, the first drying mechanism 5 and the second drying mechanism 6 have the same structure, wherein the first drying mechanism 5 includes an upper box cover 32, a lower box cover 33 and a mounting plate 34, a second bidirectional screw rod 36 driven to rotate by a lifting motor 35 is mounted on the mounting plate 34, a second bidirectional screw rod 36 is provided with a second forward nut and a second reverse nut, an upper mounting frame 37 is connected to the outer side of the upper box cover 32, the upper mounting frame 37 is fixedly connected to the second forward nut, a lower mounting frame 38 is connected to the outer side of the lower box cover 33, the lower mounting frame 38 is fixedly connected to the second reverse nut, the upper box cover 32 covers the flip opening 14 from above the turntable 2, the lower box cover 33 covers the flip opening 14 from below the turntable 2, an air outlet pipe is connected to the upper box cover 32, and a heating device is installed in the lower box cover 33. When the second bidirectional screw rod 36 rotates, the upper box cover 32 and the lower box cover 33 approach each other and cover the flip opening 14 or move away from each other to release the flip opening 14. When the upper cover 32 and the lower cover 33 are away from each other and the turnover opening 14 is released, the rotation of the turntable 2 is not affected. When the upper cover 32 and the lower cover 33 are close to each other and cover the turnover opening 14 for drying, the turnover frame 15 rotates slowly therein, thereby improving the drying rate and the drying effect.

[0027] Furthermore, the mounting plate 34 of the first drying mechanism 5 is fixedly connected to the first slide 27, and the mounting plate 34 of the second drying mechanism 6 is fixedly connected to the second slide 28. The first drying mechanism 5 and the second drying mechanism 6 are driven by the first bidirectional screw 31 to move or move out of the first drying station 9 and the second drying station 12 respectively.

[0028] Furthermore, the turntable 2 is in a regular hexagonal shape, and two sides of the first slide 27 are provided with positioning angles 39 for two adjacent corners of the regular hexagonal turntable to be inserted into. The positioning angles 39 match the angle of the regular hexagonal turntable 2 to ensure that the rotation angle of the turntable 2 is accurate, further improving the positioning accuracy of the silicon wafer.

[0029] Furthermore, the front screen printer 3 and the back screen printer 4 have the same structure, wherein the front screen printer 3 includes a scraper assembly 40, a horizontal movement driving mechanism for driving the scraper assembly 40 to move horizontally back and forth, and a vertical movement driving mechanism for driving the scraper assembly to move vertically back and forth.

[0030] Furthermore, the horizontal movement driving mechanism includes a horizontally arranged first screw rod 41, a first motor 42 for driving the first screw rod 41 to rotate, a first guide rod 43 arranged on both sides of the first screw rod 41, and a horizontal movement block 44 movably mounted on the first guide rod 43, the screw rod pair of the first screw rod 41 is fixedly connected to the horizontal movement block 44, and the scraper assembly 40 is mounted on the horizontal movement block 44, and the vertical movement driving mechanism includes a vertically arranged second screw rod 45, a second motor 46 for driving the second screw rod 45 to rotate, a second guide rod 47 arranged on both sides of the second screw rod 45, and a lifting frame 48 movably mounted on the second guide rod 47, the screw rod pair of the second screw rod 45 is fixedly connected to the lifting frame 48, and the first screw rod 45 and the first guide rod 43 are mounted on the lifting frame 48.

[0031] It is worth mentioning that the technical features of other components of the screen printing machine involved in the patent application of this invention, such as the scraper assembly, should be regarded as the prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected according to the conventional methods in the field, and should not be regarded as the inventive point of the patent of this invention. The patent of this invention will not be further elaborated.

[0032] The preferred specific embodiments of the present invention are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A battery double-sided printing device, characterized in that: The invention comprises a base, a turntable, a front screen printer, a back screen printer, a first drying mechanism and a second drying mechanism. The turntable is rotatably mounted on the base through motor control. The base is provided with loading and unloading stations, a front printing station, a first drying station, a flipping station, a back printing station and a second drying station in sequence and evenly spaced around the turntable. The front screen printer is mounted on the front printing station, the back screen printer is mounted on the back printing station, the first drying mechanism is mounted on the first drying station, and the second drying mechanism is mounted on the second drying station. The turntable is provided with a plurality of wafer clamping and flipping mechanisms evenly spaced. The silicon wafer clamping and flipping mechanism comprises a flipping opening on a turntable, a flipping frame is arranged in the flipping opening, two ends of the flipping frame are rotatably installed in the flipping opening through a rotating shaft, and the flipping frame is controlled to flip by a flipping motor that drives one of the rotating shafts to rotate, two lower limit bars arranged in parallel are arranged on both sides of the interior of the flipping frame, upper limit bars are arranged above the lower limit bars, two ends of the lower limit bars are respectively connected to the two ends of the flipping frame, one end of the upper limit bar is connected to one end of the flipping frame, and a clearance opening is formed between the other end and the other end of the flipping frame. There are several positioning holes on both sides of the flip frame, and several positioning pins are installed on the turntable. The positioning pins correspond to the positioning holes, and the positioning pins are driven by the cylinder to be inserted into the corresponding positioning holes. One of the positioning holes is set as a limiting hole, and a limiting plate is connected to the positioning pin corresponding to the positioning hole. The limiting hole is connected to the inner side of the flip frame and is located between the upper limiting strip and the lower limiting strip. One end of the limiting plate is fixedly connected to the positioning pin, and the other end passes through the limiting hole and extends into the flip frame. The front screen printer is installed on the first slide, and the back screen printer is installed on the second slide. The first slide and the second slide have the same structure. A slide rail is provided on the base. The first slide and the second slide are respectively installed on the slide rail. A first bidirectional screw driven by a mobile motor is installed on the base. A first forward nut and a first reverse nut are provided on the first bidirectional screw. The first forward nut is fixedly connected to the first slide, and the first reverse nut is fixedly connected to the second slide. The first drying mechanism and the second drying mechanism have the same structure, wherein the first drying mechanism comprises an upper box cover, a lower box cover and a mounting plate, a second bidirectional screw rod driven to rotate by a lifting motor is mounted on the mounting plate, a second bidirectional screw rod is provided with a second positive nut and a second reverse nut, an upper mounting frame is connected to the outer side of the upper box cover, the upper mounting frame is fixedly connected to the second positive nut, a lower box cover is connected to the outer side of the lower box cover, the lower mounting frame is fixedly connected to the second reverse nut, the upper box cover covers the flip opening from above the turntable, the lower box cover covers the flip opening from below the turntable, an air outlet pipe is connected to the upper box cover, and a heating device is installed in the lower box cover, The upper surface of the lower limiting strip and the lower surface of the upper limiting strip are respectively installed with elastic rubber strips, and the lower surface of one end of the upper limiting strip close to the yielding opening is an inclined surface.

2. The battery double-sided printing device according to claim 1, characterized in that: The mounting plate of the first drying mechanism is fixedly connected to the first slide, and the mounting plate of the second drying mechanism is fixedly connected to the second slide.

3. The battery double-sided printing device according to claim 2, characterized in that: The turntable is in the shape of a regular hexagon, and positioning angles for two adjacent angles of the turntable of the regular hexagon to be inserted are respectively arranged on both sides of the first slide.

4. The battery double-sided printing device according to claim 3, characterized in that: The front screen printer and the back screen printer have the same structure, wherein the front screen printer comprises a scraper assembly, a horizontal movement driving mechanism for driving the scraper assembly to move horizontally back and forth, and a vertical movement driving mechanism for driving the scraper assembly to move vertically back and forth.

5. The battery double-sided printing device according to claim 4, characterized in that: The horizontal movement driving mechanism includes a first screw rod arranged horizontally, a first motor driving the first screw rod to rotate, a first guide rod arranged on both sides of the first screw rod, a horizontal movement block movably mounted on the first guide rod, a screw rod pair of the first screw rod is fixedly connected to the horizontal movement block, and a scraper assembly is mounted on the horizontal movement block; the vertical movement driving mechanism includes a second screw rod arranged vertically, a second motor driving the second screw rod to rotate, a second guide rod arranged on both sides of the second screw rod, and a lifting frame movably mounted on the second guide rod, the screw rod pair of the second screw rod is fixedly connected to the lifting frame, and the first screw rod and the first guide rod are mounted on the lifting frame.

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