Monocrystalline silicon edge material surface laser ablation device with continuous feeding function

Abstract

The utility model discloses a continuous feeding monocrystalline silicon edge material surface laser ablation device which comprises an outer shell, a first conveying belt is arranged at the feeding end of the outer shell, two sets of second conveying belts are arranged at the discharging end of the outer shell, and the two sets of second conveying belts are arranged on the two sides of the first conveying belt respectively. The laser ablation device has the beneficial effects that the first conveying belt and the two groups of second conveying belts are matched with each other, so that the first laser generator and the fourth laser generator can perform laser ablation on different parts at the bottom of the monocrystalline silicon leftover material in the process that the first conveying belt and the second conveying belts alternately drive the monocrystalline silicon leftover material to move; and meanwhile, a second laser generator and a third laser generator are matched to ablate the end face and the upper surface of the monocrystalline silicon leftover material, so that the situation that the monocrystalline silicon leftover material is driven to be turned over and machined through clamping can be effectively avoided, and the safety of equipment is improved.

Description

Technical Field

[0001] This utility model relates to the field of crystalline silicon solar cell production technology, and in particular to a laser ablation device for the surface of monocrystalline silicon edge material with continuous feeding. Background Technology

[0002] After silicon ingots are squared and the ends are removed, a large amount of monocrystalline silicon edge material is generated. Due to the excessive impurities in the edge material, it cannot be directly recycled. It is necessary to first clean the dust and mud on the surface of the monocrystalline silicon edge material, and then remove the oxide layer on its surface to make it meet the recycling standard. This completes the recycling of monocrystalline silicon edge material of different qualities and avoids resource waste.

[0003] The surface cleaning of monocrystalline silicon edge material generally involves acid washing and laser ablation. Since monocrystalline silicon edge material has multiple end faces that need to be cleaned, some existing laser ablation devices for the surface of monocrystalline silicon edge material mainly use clamps to flip the material and perform laser ablation on the multiple end faces of the silicon edge material. In the process of clamping and flipping the material, not only is the operation inconvenient and the processing efficiency low, but the weight of the monocrystalline silicon edge material is also large, which poses a risk of falling off and certain safety hazards. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing laser ablation devices for monocrystalline silicon edge materials, which mainly rely on clamps to flip the material and perform laser ablation on multiple end faces of the monocrystalline silicon edge material. In the process of clamping and flipping the material, not only is the operation inconvenient and the processing efficiency low, but the monocrystalline silicon edge material is also heavy and there is a risk of falling off, which poses certain safety hazards. This invention provides a laser ablation device for monocrystalline silicon edge material with continuous feeding.

[0005] The purpose of this utility model is achieved through the following technical solution: a laser ablation device for the surface of continuously fed monocrystalline silicon edge material, comprising an outer shell, a first conveyor belt at the feeding end of the outer shell, and two sets of second conveyor belts at the discharging end of the outer shell. The two sets of second conveyor belts are respectively arranged on both sides of the first conveyor belt, and the feeding ends of the two sets of second conveyor belts correspond to the discharging ends of the first conveyor belt. Monocrystalline silicon edge material is placed on both the first and second conveyor belts at equal intervals. The length of the monocrystalline silicon edge material is greater than the width of the first conveyor belt, and the length of the monocrystalline silicon edge material is less than the distance between the two far apart sides of the two sets of second conveyor belts.

[0006] Two sets of first laser generators are installed on the inner bottom wall of the outer casing. The two sets of first laser generators are located on both sides of the first conveyor belt. A second laser generator corresponding to the two ends of the monocrystalline silicon edge material is installed on both inner side walls of the outer casing. A movable third laser generator is installed inside the outer casing. The third laser generator is located above the first and second conveyor belts. A fourth laser generator is installed on the inner bottom wall of the outer casing. The fourth laser generator is located between the two sets of second conveyor belts.

[0007] By setting up a first conveyor belt and two sets of second conveyor belts in coordination, the first and second conveyor belts can alternately move the monocrystalline silicon edge material, allowing the first and fourth laser generators to perform laser ablation on different parts of the bottom of the monocrystalline silicon edge material. At the same time, the second and third laser generators can work together to ablate the end face and upper surface of the monocrystalline silicon edge material. This effectively avoids the need to use clamps to flip the monocrystalline silicon edge material during processing, improving the safety of the equipment. Furthermore, the monocrystalline silicon edge material can be moved on the first and second conveyor belts in conjunction with the first, second, third, and fourth laser generators to complete the laser ablation, making the operation convenient and improving the processing efficiency of the equipment.

[0008] A further technical solution is that both the first and second conveyor belts are equipped with equally spaced limiting components, each including two sets of locking blocks, with the monocrystalline silicon edge material placed between the two sets of locking blocks.

[0009] By setting limiters to limit the movement of the monocrystalline silicon edge material, relative displacement of the monocrystalline silicon edge material on the first and second conveyor belts is avoided, ensuring the accuracy of the movement of the monocrystalline silicon edge material and thus ensuring the processing precision of the equipment.

[0010] A further technical solution involves coaxially aligning the discharge end of the first conveyor belt with the infeed ends of the two sets of second conveyor belts. A drive roller is installed within the housing, connecting to both the discharge end of the first conveyor belt and the infeed ends of the two sets of second conveyor belts. One end of the drive roller extends outside the housing and connects to an external power source. By connecting the drive roller to the first and second conveyor belts, synchronous rotation of the first and second conveyor belts is ensured, allowing the monocrystalline silicon edge material to move smoothly from the discharge end of the first conveyor belt to the infeed end of the second conveyor belt, thus ensuring the stability of the edge material's movement. Simultaneously, corresponding limiting components on the first and second conveyor belts are provided, enabling the monocrystalline silicon edge material to move from the limiting components on the first conveyor belt directly onto the second conveyor belt and engage with them, further ensuring the stability of the monocrystalline silicon edge material's displacement.

[0011] A further technical solution is that the external power device is a servo motor, and an encoder for measuring the rotation angle of the motor shaft is installed on the servo motor;

[0012] The horizontal distance between the third and fourth laser generators is equal to the horizontal distance between the first and third laser generators. The horizontal distance between the first and third laser generators is equal to the distance between two sets of adjacent limiting components. The two sets of second laser generators correspond to the two sets of first laser generators.

[0013] By setting the encoder on the servo motor, the movement distance of the first and second conveyor belts can be controlled by controlling the rotation angle of the motor shaft. The horizontal distance between the third and fourth laser generators is set to be equal to the horizontal distance between the first and third laser generators, and the horizontal distance between the first and third laser generators is equal to the distance between two sets of adjacent limiting components. This allows multiple sets of monocrystalline silicon edge materials to pause and move on the first and second conveyor belts for processing. At the same time, the first, second, third, and fourth laser generators can simultaneously perform laser ablation processing on different surfaces of multiple sets of monocrystalline silicon edge materials, effectively improving the processing efficiency of the equipment.

[0014] A further technical solution is to install a gas collection hood on the upper part of the outer casing, and a negative pressure fan on the upper part of the gas collection hood. The outlet of the negative pressure fan is connected to a flue gas treatment device. By setting up the gas collection hood and the negative pressure fan, the harmful fumes generated during processing can be collected and treated by the external flue gas treatment device, thus preventing the fumes from overflowing and causing damage to the external environment.

[0015] A further technical solution is to install an electric slide inside the outer casing, with a third laser generator installed at the moving end of the electric slide.

[0016] This invention has the following advantages: By setting up a first conveyor belt and two sets of second conveyor belts in coordination, the first and second conveyor belts can alternately move the monocrystalline silicon edge material, allowing the first and fourth laser generators to perform laser ablation on different parts of the bottom of the monocrystalline silicon edge material. At the same time, the second and third laser generators can work together to ablate the end face and upper surface of the monocrystalline silicon edge material. This effectively avoids the need to use clamping to flip the monocrystalline silicon edge material during processing, improving the safety of the equipment. Furthermore, the monocrystalline silicon edge material can complete laser ablation simply by moving on the first and second conveyor belts in conjunction with the first, second, third, and fourth laser generators, making the operation convenient and improving the processing efficiency of the equipment. Attached Figure Description

[0017] Figure 1This is a three-dimensional schematic diagram of the internal structure of the outer shell of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0019] In the figure, 1. Outer shell; 2. First conveyor belt; 3. Second conveyor belt; 4. Limiting component; 401. Clamping block; 5. First laser generator; 6. Second laser generator; 7. Third laser generator; 8. Fourth laser generator; 9. Electric slide table; 10. Monocrystalline silicon edge material; 11. Transmission roller; 12. Gas collection hood; 13. Negative pressure fan. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] like Figures 1-2 As shown, a laser ablation device for the surface of continuously fed monocrystalline silicon edge material includes an outer shell 1. A first conveyor belt 2 is provided at the feeding end of the outer shell 1, and two sets of second conveyor belts 3 are provided at the discharging end of the outer shell 1. The two sets of second conveyor belts 3 are respectively arranged on both sides of the first conveyor belt 2, and the feeding ends of the two sets of second conveyor belts 3 correspond to the discharging ends of the first conveyor belt 2. Monocrystalline silicon edge material 10 is placed on both the first conveyor belt 2 and the second conveyor belt 3 at equal intervals. The length of the monocrystalline silicon edge material 10 is greater than the width of the first conveyor belt 2, and the length of the monocrystalline silicon edge material 10 is less than the distance between the two sets of second conveyor belts 3 on opposite sides.

[0027] Two sets of first laser generators 5 are installed on the inner bottom wall of the outer casing 1. The two sets of first laser generators 5 are located on both sides of the first conveyor belt 2. The two inner side walls of the outer casing 1 are each equipped with a second laser generator 6 corresponding to the two ends of the monocrystalline silicon edge material 10. A movable third laser generator 7 is installed inside the outer casing 1. The third laser generator 7 is located above the first conveyor belt 2 and the second conveyor belt 3. A fourth laser generator 8 is installed on the inner bottom wall of the outer casing 1. The fourth laser generator 8 is located between the two sets of second conveyor belts 3. An electric slide table 9 is installed inside the outer casing 1. The third laser generator 7 is installed at the moving end of the electric slide table 9.

[0028] By setting up a first conveyor belt 2 and two sets of second conveyor belts 3 in coordination, the first laser generator 5 and the fourth laser generator 8 can perform laser ablation on different parts of the bottom of the monocrystalline silicon edge material 10 while the first conveyor belt 2 and the second conveyor belt 3 alternately move the monocrystalline silicon edge material 10. At the same time, the second laser generator 6 and the third laser generator 7 work together to ablate the end face and the upper surface of the monocrystalline silicon edge material 10. This effectively avoids the need to use clamping to flip the monocrystalline silicon edge material 10, improving the safety of the equipment. The monocrystalline silicon edge material 10 can complete the laser ablation by moving on the first conveyor belt 2 and the second conveyor belt 3 in coordination with the first laser generator 5, the second laser generator 6, the third laser generator 7 and the fourth laser generator 8. The operation is convenient and the processing efficiency of the equipment is improved.

[0029] Both the first conveyor belt 2 and the second conveyor belt 3 are equipped with equidistant limiting members 4. The limiting members 4 include two sets of locking blocks 401, and the monocrystalline silicon edge material 10 is placed between the two sets of locking blocks 401.

[0030] By setting the limiting component 4 to limit the monocrystalline silicon edge material 10, the relative displacement of the monocrystalline silicon edge material 10 on the first conveyor belt 2 and the second conveyor belt 3 is avoided, ensuring the accuracy of the movement of the monocrystalline silicon edge material 10, thereby ensuring the processing accuracy of the equipment.

[0031] The discharge end of the first conveyor belt 2 is coaxially arranged with the feed ends of the two sets of second conveyor belts 3. A transmission roller 11 is installed inside the outer casing 1. The transmission roller 11 is connected to the discharge end of the first conveyor belt 2 and the feed ends of the two sets of second conveyor belts 3 respectively. One end of the transmission roller 11 extends outside the outer casing 1 and is connected to an external power device. By setting the transmission roller 11 to be connected to the first conveyor belt 2 and the second conveyor belt 3, it is possible to ensure that the first conveyor belt 2 and the second conveyor belt 3 can rotate synchronously, so that the monocrystalline silicon edge material 10 can move smoothly from the discharge end of the first conveyor belt 2 to the feed end of the second conveyor belt 3, ensuring the stability of the movement of the monocrystalline silicon edge material 10. At the same time, the limiting member 4 on the first conveyor belt 2 and the limiting member 4 on the second conveyor belt 3 are correspondingly arranged, so that the monocrystalline silicon edge material 10 can move out of the limiting member 4 on the first conveyor belt 2 and directly enter the second conveyor belt 3 and engage with the limiting member 4 on the second conveyor belt 3, ensuring the stability of the displacement of the monocrystalline silicon edge material 10.

[0032] The external power source is a servo motor, which is equipped with an encoder for measuring the rotation angle of the motor shaft.

[0033] The horizontal distance between the third laser generator 7 and the fourth laser generator 8 is equal to the horizontal distance between the first laser generator 5 and the third laser generator 7. The horizontal distance between the first laser generator 5 and the third laser generator 7 is equal to the distance between the two sets of adjacent limiting members 4. The two sets of second laser generators 6 correspond to the two sets of first laser generators 5.

[0034] By setting the encoder on the servo motor, the movement distance of the first conveyor belt 2 and the second conveyor belt 3 can be controlled by controlling the rotation angle of the motor shaft. The horizontal distance between the third laser generator 7 and the fourth laser generator 8 is set to be equal to the horizontal distance between the first laser generator 5 and the third laser generator 7. The horizontal distance between the first laser generator 5 and the third laser generator 7 is equal to the distance between two sets of adjacent limiting members 4. When multiple sets of monocrystalline silicon edge materials 10 are paused on the first conveyor belt 2 and the second conveyor belt 3 for processing, the first laser generator 5, the second laser generator 6, the third laser generator 7 and the fourth laser generator 8 can simultaneously perform laser ablation processing on different surfaces of multiple sets of monocrystalline silicon edge materials 10, effectively improving the processing efficiency of the equipment.

[0035] A gas collection hood 12 is installed on the upper part of the outer casing 1, and a negative pressure fan 13 is installed on the upper part of the gas collection hood 12. The outlet end of the negative pressure fan 13 is connected to a flue gas treatment device. By setting up the gas collection hood 12 and the negative pressure fan 13, the harmful fumes generated during processing can be collected to the external flue gas treatment device for treatment, thus preventing the fumes from overflowing and causing damage to the external environment.

[0036] The working process of this utility model is as follows: When using this device for processing, multiple sets of monocrystalline silicon edge material 10 are first placed on multiple sets of limiting members 4 on the first conveyor belt 2. The first conveyor belt 2 drives the monocrystalline silicon edge material 10 into the outer shell 1. The servo motor controls the movement distance of the monocrystalline silicon edge material 10 driven by the first conveyor belt 2 and the second conveyor belt 3 by controlling the rotation angle of the transmission roller 11. The first laser generator 5 and the second laser generator 6 on both sides of the first conveyor belt 2 first perform laser ablation processing on both ends and the two sides of the bottom surface of the monocrystalline silicon edge material 10. After processing is completed, the servo motor is started again to drive the monocrystalline silicon edge material 10 to move, so that the monocrystalline silicon edge material 10 processed at the first laser generator 5 and the second laser generator 6 is moved to the third laser generator 7. The process begins at each workstation. The electric slide table 9 moves the third laser generator 7 to process the upper surface of the monocrystalline silicon edge material 10. Simultaneously, the next group of monocrystalline silicon edge materials 10 on the first conveyor belt 2 moves to the workstations of the first laser generator 5 and the second laser generator 6 for processing. When multiple monocrystalline silicon edge materials 10 have been processed by the first laser generator 5, the second laser generator 6, and the third laser generator 7, the servo motor restarts, causing the monocrystalline silicon edge materials 10 processed by the third laser generator 7 to move to the fourth laser generator 8 for processing. Subsequent groups of monocrystalline silicon edge materials 10 can then be processed by laser ablation on multiple surfaces sequentially at the workstations corresponding to the first laser generator 5, the second laser generator 6, the third laser generator 7, and the fourth laser generator 8, following the above steps.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laser ablation device for the surface of continuously fed monocrystalline silicon edge material, comprising a housing (1), characterized in that: The outer casing (1) is provided with a first conveyor belt (2) at the feeding end and two sets of second conveyor belts (3) at the discharging end of the outer casing (1). The two sets of second conveyor belts (3) are respectively located on both sides of the first conveyor belt (2), and the feeding ends of the two sets of second conveyor belts (3) correspond to the discharging ends of the first conveyor belt (2). The first conveyor belt (2) and the second conveyor belt (3) are each placed with monocrystalline silicon edge material (10) arranged at equal intervals. The length of the monocrystalline silicon edge material (10) is greater than the width of the first conveyor belt (2), and the length of the monocrystalline silicon edge material (10) is less than the distance between the two sets of second conveyor belts (3) on opposite sides. Two sets of first laser generators (5) are installed on the inner bottom wall of the outer shell (1). The two sets of first laser generators (5) are located on both sides of the first conveyor belt (2). The two inner side walls of the outer shell (1) are each equipped with a second laser generator (6) corresponding to the two ends of the single crystal silicon edge material (10). A movable third laser generator (7) is installed inside the outer shell (1). The third laser generator (7) is located above the first conveyor belt (2) and the second conveyor belt (3). A fourth laser generator (8) is installed on the inner bottom wall of the outer shell (1). The fourth laser generator (8) is located between the two sets of second conveyor belts (3).

2. The laser ablation device for the surface of continuously fed monocrystalline silicon edge material according to claim 1, characterized in that: Both the first conveyor belt (2) and the second conveyor belt (3) are equipped with equidistant limiting members (4). The limiting members (4) include two sets of locking blocks (401), and the monocrystalline silicon edge material (10) is placed between the two sets of locking blocks (401).

3. The laser ablation device for the surface of continuously fed monocrystalline silicon edge material according to claim 2, characterized in that: The discharge end of the first conveyor belt (2) is coaxially arranged with the feed ends of the two sets of second conveyor belts (3). A transmission roller (11) is installed inside the outer shell (1). The transmission roller (11) is connected to the discharge end of the first conveyor belt (2) and the feed ends of the two sets of second conveyor belts (3) respectively. One end of the transmission roller (11) extends to the outside of the outer shell (1) and is connected to an external power device.

4. The laser ablation device for the surface of continuously fed monocrystalline silicon edge material according to claim 3, characterized in that: The external power device is a servo motor, and the servo motor is equipped with an encoder for measuring the rotation angle of the motor shaft; The horizontal distance between the third laser generator (7) and the fourth laser generator (8) is equal to the horizontal distance between the first laser generator (5) and the third laser generator (7). The horizontal distance between the first laser generator (5) and the third laser generator (7) is equal to the distance between two sets of adjacent limiting members (4). The two sets of second laser generators (6) correspond to the two sets of first laser generators (5).

5. The laser ablation device for the surface of continuously fed monocrystalline silicon edge material according to claim 1, characterized in that: A gas collection hood (12) is installed on the upper part of the outer shell (1), and a negative pressure fan (13) is installed on the upper part of the gas collection hood (12). The outlet end of the negative pressure fan (13) is connected to a flue gas treatment device.

6. The laser ablation device for the surface of continuously fed monocrystalline silicon edge material according to claim 1, characterized in that: An electric slide (9) is installed inside the outer casing (1), and the third laser generator (7) is installed on the moving end of the electric slide (9).

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