Photovoltaic solar silicon wafer screen printing positioning device and using method

Abstract

The invention discloses a photovoltaic solar silicon wafer silk-screen printing positioning device and a using method, the photovoltaic solar silicon wafer silk-screen printing positioning device comprises a printing table and a positioning seat, the positioning seat is installed at the top of the printing table, a silicon wafer silk screen is placed in the positioning seat, and a lifting scraper frame is installed at the top of the printing table. During printing processing, a driving assembly drives a positioning seat to move to the position below a lifting scraper frame for printing, in the process, air pushing piston rods slide into an air cylinder A, air in the air cylinder A enters an exhaust cylinder B through an air channel, the multiple positioning piston rods push clamping plates A to move, and the two sides of a silicon wafer silk screen are clamped; and meanwhile, the bevel push block can also move to enable the clamping plate B to move, finally, after the silicon wafer silk screen moves to the printing position, the four sides of the silicon wafer silk screen are tightly attached to the clamping plate B, the clamping plate A and the inner wall of the positioning base correspondingly to complete clamping, manual operation is not needed for positioning, automatic clamping is achieved, and inconvenience caused by using electric equipment is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of screen printing for photovoltaic solar silicon wafers, and specifically to a positioning device and a usage method for screen printing of photovoltaic solar silicon wafers. Background Art

[0002] In the manufacturing process of photovoltaic solar cells, screen printing is mainly applied to the formation of electrodes of the cells. Printing is carried out based on the basic principle that the mesh holes in the graphic part of the screen allow the paste to pass through, while the mesh holes in the non-graphic part do not. During printing, the paste is poured at one end of the screen, and a squeegee applies a certain pressure to the paste part of the screen and moves towards the other end of the screen at the same time. The paste is extruded from the mesh holes in the graphic part onto the substrate by the squeegee during the movement, forming the required pattern.

[0003] Currently, when screen printing photovoltaic solar silicon wafers, in order to maintain stability, it is necessary to effectively fix the silicon wafer screen. The traditional operation method is to manually place the silicon wafer screen under the squeegee and then fix it through some mechanical structures. This may pose certain safety hazards. At the same time, manual clamping is very inconvenient, and the squeegee and related moving devices also affect the operation space, which is very inconvenient for loading and unloading. Some improved devices use an electric clamping mechanism for clamping. For example, a positioning device for screen printing of a solar cell panel disclosed in Patent No. CN215704941U. However, the electric push rod has relatively high requirements for users. Due to the structure and working principle of the electric push rod, its clamping accuracy may be affected to a certain extent. Improper operation may even damage the wafer screen, or cause printing deviation due to insufficient clamping.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structural deficiencies, and a positioning device and a usage method for screen printing of photovoltaic solar silicon wafers are proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a positioning device and a usage method for screen printing of photovoltaic solar silicon wafers to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A positioning device for screen printing of photovoltaic solar silicon wafers, comprising a printing table and a positioning seat. The positioning seat is installed on the top of the printing table, and a silicon wafer screen is placed inside the positioning seat. A lifting squeegee holder is installed on the top of the printing table. A driving component is connected between the positioning seat and the printing table, and the driving component is used to drive the horizontal displacement of the positioning seat. Two air cylinders A are fixed on both sides of the positioning seat. A pushing air piston rod passes through one side of the air cylinder A, and the pushing air piston rod is fixed on the inner wall of the printing table. The other end of the air cylinder A is connected to the internal air duct of the positioning seat through a conduit. The air duct is respectively communicated with an exhaust air cylinder B. The air cylinder B is fixed on both sides inside the positioning seat, and a positioning piston rod passes through one side of the air cylinder B. The positioning piston rod is fixed on one side of the clamping plate A. One side of the clamping plate A is connected with an inclined surface pushing block. The two inclined surface pushing blocks are attached to the inclined surface on one side of the clamping plate B. One side of the clamping plate B is connected with a spring and a guide rod to the inner wall of the positioning seat, and the guide rod slides in the opening of the positioning seat.

[0007] Preferably, rubber pads are bonded to the clamping surfaces of the clamping plate B and the clamping plate A, and the rubber pads are attached to the outer wall of the silicon wafer screen.

[0008] Preferably, a support plate is inserted into the positioning seat from one side opening. Three rows of ball grooves are provided on the surface of the support plate, and balls are placed in the ball grooves.

[0009] Preferably, a flip plate is hinged at the front opening of the printing table, and the flip plate is used to open for taking and placing the support plate.

[0010] Preferably, a baffle one is rotatably connected above the support plate on one side of the positioning seat, and baffle twos are rotatably connected at both sides of the flip plate on the front of the printing table.

[0011] Preferably, thickened foam pads are bonded to the inner walls of the printing table and the flip plate.

[0012] Preferably, the driving component includes a horizontal rod rotatably connected to the inner wall of the printing table, and the horizontal rod is butted against a motor installed on one side of the printing table. Two gears are fixed on the horizontal rod, and the gears are meshed with the tooth track at the bottom of the positioning seat.

[0013] Preferably, the driving component further includes two limit sliders fixed at the bottom of the positioning seat. The limit sliders slide in the slideway on the top of the printing table, and the horizontal rod passes through the opening of the limit slider.

[0014] The present invention also provides a usage method of a positioning device for screen printing of photovoltaic solar silicon wafers, including the following steps:

[0015] S1. Loading step

[0016] First, after placing the silicon wafer screen, rotate the gear to apply a thrust to the positioning seat by meshing with the tooth track, so that the positioning seat slides in the slideway through the limit slider for displacement, and move the positioning seat under the lifting squeegee holder to perform the printing work;

[0017] S2. Positioning step

[0018] During the movement of the positioning seat, the push air piston rod slides into the air cylinder A, so that the gas inside the air cylinder A enters the exhaust cylinder B through the air duct, causing multiple positioning piston rods to displace, so that the clamping plate A clamps both sides of the silicon wafer screen. At the same time, the inclined plane push block will also cause the clamping plate B to displace through the sliding of the guide rod, and finally just complete the clamping after moving to the printing position;

[0019] S3. Printing and blanking step

[0020] During printing, the lifting squeegee holder moves down, and then printing is performed by the squeegee. After printing is completed, the positioning seat returns to its original position, and the clamping plate B and the clamping plate A will automatically release the clamping, and finally the silicon wafer screen can be taken out.

[0021] The present invention provides a positioning device and a use method for a photovoltaic solar silicon wafer screen printing, having the following beneficial effects:

[0022] 1. When the present invention performs printing processing, the driving component drives the positioning seat to move under the lifting squeegee holder for printing. During this process, the push air piston rod slides into the air cylinder A, so that the gas inside the air cylinder A enters the exhaust cylinder B through the air duct, causing multiple positioning piston rods to push the clamping plate A to move, clamping both sides of the silicon wafer screen. At the same time, the inclined plane push block will also displace to cause the clamping plate B to displace. Finally, after moving to the printing position, the four sides of the silicon wafer screen are respectively in close contact with the clamping plate B, the clamping plate A and the inner wall of the positioning seat to complete the clamping. In this way, positioning does not require manual operation, realizing automatic clamping and avoiding the inconveniences brought by using electric equipment.

[0023] 2. In the optimized design of the positioning seat structure of the present invention, the rubber pad can enhance the clamping effect and avoid wear caused by excessive extrusion force, playing a protective role. And there are balls on the surface of the support plate, so the silicon wafer screen can slide on the surface of the support plate, facilitating a small displacement during clamping, and the bottom is suspended for easy removal after printing is completed. Since the surface of the printing support plate may be stained with oil, when taking it, rotate the baffle two to open the flip plate, and then rotate the baffle one to pull out the support plate, which is very convenient.

[0024] 3. Through the design of the driving component, for the convenience of picking up and placing operations, after placing the silicon wafer screen, the horizontal rod can be rotated by the motor, and then the two gears can apply a thrust to the positioning seat by meshing with the tooth track, so that the positioning seat slides in the slideway through the limit slider for displacement, and the positioning seat is moved under the lifting squeegee holder, avoiding the problem of inconvenient picking up and placing due to space problems and reducing potential safety hazards.

[0025] 4. Through the design of the foam pad, when the positioning seat moves for picking up, placing and printing, it can play a good buffering role by contacting the foam pad, avoiding abrasion of the motor, gears and tooth tracks caused by sudden stop during driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic perspective view of the overall three-dimensional structure of a photovoltaic solar silicon wafer screen printing positioning device and its usage method according to the present invention;

[0027] Figure 2 It is a schematic front cross-sectional view of the overall structure of a photovoltaic solar silicon wafer screen printing positioning device and its usage method according to the present invention;

[0028] Figure 3 It is a schematic top cross-sectional view of the overall structure of a photovoltaic solar silicon wafer screen printing positioning device and its usage method according to the present invention;

[0029] Figure 4 It is a schematic perspective view of the positioning seat structure of a photovoltaic solar silicon wafer screen printing positioning device and its usage method according to the present invention;

[0030] Figure 5 It is a schematic perspective view of the driving component structure of a photovoltaic solar silicon wafer screen printing positioning device and its usage method according to the present invention, and the limit slider and the slideway are in a split state;

[0031] Figure 6 It is a schematic top cross-sectional view of the positioning seat of a photovoltaic solar silicon wafer screen printing positioning device and its usage method according to the present invention;

[0032] Figure 7 It is a schematic front cross-sectional view of the driving component of a photovoltaic solar silicon wafer screen printing positioning device and its usage method according to the present invention;

[0033] Figure 8 It is a photovoltaic solar silicon wafer screen printing positioning device and its usage method according to the present invention Figure 2 The enlarged schematic view at position A.

[0034] In the figure: 1. Printing table; 11. Lifting squeegee holder; 12. Flipping plate; 13. Second baffle; 14. Foam pad; 2. Positioning seat; 21. Cylinder A; 22. Pneumatic piston rod; 23. Air passage; 24. Cylinder B; 25. Positioning piston rod; 26. Clamping plate A; 27. Inclined plane push block; 28. Clamping plate B; 29. Guide rod; 210. Spring; 211. Rubber pad; 212. Support plate; 213. Ball; 3. Silicon wafer screen; 4. Driving assembly; 41. Horizontal rod; 42. Gear; 43. Tooth track; 44. Limit slider; 45. Slideway. Detailed implementation mode

[0035] The following further describes in detail the implementation mode of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0036] Please refer to Figure 1-8 , the present invention provides a technical solution: a positioning device for screen printing of photovoltaic solar silicon wafers, including a printing table 1 and a positioning seat 2. The positioning seat 2 is installed on the top of the printing table 1. A silicon wafer screen 3 is placed inside the positioning seat 2. A lifting squeegee holder 11 is installed on the top of the printing table 1. A driving assembly 4 is connected between the positioning seat 2 and the printing table 1. The driving assembly 4 is used to drive the horizontal displacement of the positioning seat 2. Cylinders A 21 are fixed on both sides of the positioning seat 2. A pneumatic piston rod 22 passes through one side of the cylinder A 21. The pneumatic piston rod 22 is fixed on the inner wall of the printing table 1. The other end of the cylinder A 21 is connected to the air passage 23 inside the positioning seat 2 through a conduit. The air passage 23 is respectively communicated with a row of cylinders B 24. The cylinders B 24 are fixed on both sides inside the positioning seat 2. And a positioning piston rod 25 passes through one side of the cylinder B 24. The positioning piston rod 25 is fixed on one side of the clamping plate A 26. One side of the clamping plate A 26 is connected with an inclined plane push block 27. The two inclined plane push blocks 27 are attached to the inclined plane on one side of the clamping plate B 28. One side of the clamping plate B 28 is connected with a spring 210 and a guide rod 29 to the inner wall of the positioning seat 2. The guide rod 29 slides in the opening of the positioning seat 2.

[0037] Through the above structural design, during the printing process, the silicon wafer screen 3 is placed inside the positioning seat 2, and one side of the silicon wafer screen 3 is closely attached to the inner wall of the positioning seat 2. Then, the driving assembly 4 drives the positioning seat 2 to move under the lifting squeegee holder 11 for printing. During this process, the air-pushing piston rod 22 slides into the air cylinder A21, causing the gas inside the air cylinder A21 to enter the exhaust cylinder B24 through the air duct 23. As a result, multiple positioning piston rods 25 are displaced due to the compression of the gas, causing the clamping plate A26 to move and clamp both sides of the silicon wafer screen 3. At the same time, the inclined surface push block 27 also displaces. Through the cooperation of the inclined surface, the clamping plate B28 displaces by sliding along the guide rod 29. Finally, after moving to the printing position, the four sides of the silicon wafer screen 3 are respectively in close contact with the clamping plate B28, the clamping plate A26, and the inner wall of the positioning seat 2 to complete the clamping. The spring 210 facilitates the automatic reset of the clamping plate B28 when taking out. In this way, positioning does not require manual operation, achieving automatic clamping and avoiding the inconveniences brought by using electric equipment. It should be noted that the clamping plate B28 first fits with the silicon wafer screen 3, and after the inclined surface push block 27 slides a short distance on one side of the clamping plate B28, the clamping plate A26 fits with the silicon wafer screen 3.

[0038] Rubber pads 211 are bonded to the clamping surfaces of both the clamping plate B28 and the clamping plate A26, and the rubber pads 211 are in close contact with the outer wall of the silicon wafer screen 3. A support plate 212 is inserted into the positioning seat 2 from one side opening. The surface of the support plate 212 is provided with three rows of ball grooves, and ball bearings 213 are placed in the ball grooves. A flip plate 12 is hinged at the front opening of the printing table 1. The flip plate 12 is used to open for taking and placing the support plate 212. A baffle one 214 is rotatably connected above the support plate 212 on one side of the positioning seat 2, and baffle two 13 is rotatably connected at both sides of the flip plate 12 on the front of the printing table 1.

[0039] Through the above structural design, in the optimized design of the positioning seat 2 structure, the rubber pads 211 can enhance the clamping effect and avoid wear caused by excessive extrusion force, playing a protective role. Since there are ball bearings 213 on the surface of the support plate 212, the silicon wafer screen 3 can slide on the surface of the support plate 212, facilitating a small displacement during clamping, and the bottom is suspended for easy removal after printing. Since the surface of the printing support plate 212 may be stained with oil, when taking it, rotate the baffle two 13 to open the flip plate 12, and then rotate the baffle one 214 to pull out the support plate 212, which is very convenient.

[0040] Thickened foam pads 14 are bonded to the inner walls of both the printing table 1 and the flip plate 12.

[0041] Through the above structural design, when the positioning seat 2 moves for placing, taking, and printing, it can play a good buffering role by contacting the foam pad 14, avoiding wear on the motor or the gear 42 and the tooth track 43 caused by sudden stopping during driving.

[0042] The driving assembly 4 includes a horizontal rod 41 rotatably connected to the inner wall of the printing table 1, and the horizontal rod 41 is connected to a motor installed on one side of the printing table 1. Two gears 42 are fixed on the horizontal rod 41, and the gears 42 are meshed with a tooth track 43 at the bottom of the positioning seat 2. The driving assembly 4 further includes two limit sliders 44 fixed to the bottom of the positioning seat 2. The limit sliders 44 slide in a slideway 45 on the top of the printing table 1, and the horizontal rod 41 passes through an opening of the limit sliders 44.

[0043] Through the above structural design, in order to facilitate the operation of taking and placing, after the silicon wafer screen 3 is placed, the motor can be used to rotate the horizontal rod 41, and then the two gears 42 apply a thrust to the positioning seat 2 by meshing with the tooth track 43, so that the positioning seat 2 slides in the slideway 45 through the limit sliders 44 for displacement, and the positioning seat 2 is moved below the lifting squeegee holder 11, avoiding the problem of inconvenient placement and taking due to space problems and reducing potential safety hazards.

[0044] The present invention also provides a use method of a positioning device for photovoltaic solar silicon wafer screen printing, including the following steps:

[0045] S1. Feeding step

[0046] First, after the silicon wafer screen 3 is placed, rotate the gear 42 to apply a thrust to the positioning seat 2 by meshing with the tooth track 43, so that the positioning seat 2 slides in the slideway 45 through the limit sliders 44 for displacement, and the positioning seat 2 is moved below the lifting squeegee holder 11 to start the printing work.

[0047] S2. Positioning step

[0048] During the movement of the positioning seat 2, the push air piston rod 22 slides into the air cylinder A21, so that the gas inside the air cylinder A21 enters the exhaust cylinder B24 through the air duct 23, causing multiple positioning piston rods 25 to displace, so that the clamping plate A26 clamps both sides of the silicon wafer screen 3. At the same time, the inclined plane push block 27 also causes the clamping plate B28 to displace through the sliding of the guide rod 29, and finally just completes the clamping when moving to the printing position.

[0049] S3. Printing and discharging step

[0050] During printing, the lifting squeegee holder 11 moves down, and then printing is performed by the squeegee. After printing is completed, the positioning seat 2 is returned to its original position, and the clamping plate B28 and the clamping plate A26 will automatically release the clamping, and finally the silicon wafer screen 3 is taken out.

[0051] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to best explain the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention and design various implementations with various modifications suitable for a particular purpose.

Claims

1. A screen printing positioning device for a photovoltaic solar silicon wafer, comprising a printing table (1) and a positioning seat (2). The positioning seat (2) is installed on the top of the printing table (1), and a silicon wafer screen (3) is placed inside the positioning seat (2). A lifting squeegee holder (11) is installed on the top of the printing table (1), and it is characterized in that, A driving component (4) is connected between the positioning seat (2) and the printing table (1), and the driving component (4) is used to drive the positioning seat (2) to horizontally displace; On both sides of the positioning seat (2), air cylinders A (21) are fixed. A push air piston rod (22) passes through one side of the air cylinder A (21), and the push air piston rod (22) is fixed to the inner wall of the printing table (1). The other end of the air cylinder A (21) is connected to the internal air duct (23) of the positioning seat (2) through a conduit. The air ducts (23) are respectively communicated with a row of air cylinders B (24). The air cylinders B (24) are fixed on both sides inside the positioning seat (2), and a positioning piston rod (25) passes through one side of the air cylinder B (24). The positioning piston rod (25) is fixed to one side of the clamping plate A (26). One side of the clamping plate A (26) is connected with an inclined surface push block (27). The two inclined surface push blocks (27) are attached to the inclined surface on one side of the clamping plate B (28). A spring (210) and a guide rod (29) are connected between one surface of the clamping plate B (28) and the inner wall of the positioning seat (2), and the guide rod (29) slides in the opening of the positioning seat (2).

2. The screen printing positioning device for a photovoltaic solar silicon wafer according to claim 1, wherein Rubber pads (211) are bonded to the clamping surfaces of the clamping plate B (28) and the clamping plate A (26), and the rubber pads (211) are attached to the outer wall of the silicon wafer screen (3).

3. A screen printing positioning device for a photovoltaic solar silicon wafer according to claim 1, characterized in that, A support plate (212) is inserted into the positioning seat (2) from an opening on one side. Three rows of ball grooves are provided on the surface of the support plate (212), and ball bearings (213) are placed in the ball grooves.

4. A photovoltaic solar silicon wafer screen printing positioning device according to claim 3, characterized in that, A flip plate (12) is hinged at the front opening of the printing table (1), and the flip plate (12) is used to open for taking and placing the support plate (212).

5. A screen printing positioning device for a photovoltaic solar silicon wafer according to claim 4, characterized in that, A baffle one (214) is rotatably connected above the support plate (212) at one side of the positioning seat (2), and baffle two (13) is rotatably connected at the positions on both sides of the flip plate (12) on the front of the printing table (1).

6. A screen printing positioning device for photovoltaic solar silicon wafers according to claim 1, characterized in that, Thickened foam pads (14) are bonded to the inner walls of the printing table (1) and the flip plate (12).

7. A screen printing positioning device for a photovoltaic solar silicon wafer according to claim 1, characterized in that, The driving component (4) includes a horizontal rod (41) rotatably connected to the inner wall of the printing table (1), and the horizontal rod (41) is connected to a motor installed on one side of the printing table (1). Two gears (42) are fixed on the horizontal rod (41), and the gears (42) are meshed with the tooth track (43) at the bottom of the positioning seat (2).

8. A screen printing positioning device for photovoltaic solar silicon wafers according to claim 7, characterized in that, The driving component (4) further includes two limit sliders (44) fixed to the bottom of the positioning seat (2). The limit sliders (44) slide in the slideway (45) at the top of the printing table (1), and the horizontal rod (41) passes through the opening of the limit slider (44).

9. The method of using a screen printing positioning device for a photovoltaic solar silicon wafer according to any one of claims 1-8, characterized in that, The usage method includes the following steps: S1. Loading step First, after placing the silicon wafer screen (3), rotate the gear (42) to apply a thrust to the positioning seat (2) through meshing with the tooth track (43), so that the positioning seat (2) slides and displaces in the slideway (45) through the limit slider (44), and move the positioning seat (2) below the lifting squeegee holder (11) to perform printing work; S2. Positioning step During the movement of the positioning seat (2), the air-pushing piston rod (22) slides into the interior of the air cylinder A (21), causing the gas inside the air cylinder A (21) to enter the exhaust cylinder B (24) through the air passage (23), resulting in the displacement of multiple positioning piston rods (25) so that the clamping plate A (26) clamps both sides of the silicon wafer screen (3). At the same time, the inclined plane push block (27) also causes the clamping plate B (28) to displace through the sliding of the guide rod (29), and finally, the clamping is just completed after moving to the printing position; S3. Printing and blanking step During printing, the lifting scraper holder (11) moves downward, and then printing is performed by the scraper. After printing is completed, the positioning seat (2) returns to its original position, and the clamping plate B (28) and the clamping plate A (26) automatically release the clamping, and finally, the silicon wafer screen (3) can be taken out.

Images