Sheet dropping and discharging mechanism for sheet throwing

Abstract

The utility model provides a lost piece falling blanking mechanism which comprises a base plate, an adsorption assembly and a conveying assembly, and the adsorption assembly is installed on the base plate and used for adsorbing material pieces; the conveying assembly is installed on the base plate and used for conveying the material sheets adsorbed by the adsorption assembly. The adsorption assembly comprises a vacuum suction groove and a Bernoulli suction cup, and the adsorption faces of the vacuum suction groove and the Bernoulli suction cup both face the material sheet. According to the utility model, the adsorption and transmission of material sheets can be realized without arranging branch lines, and the wafer collision accident when silicon wafers are transmitted among different branch lines is avoided; through cooperation of the components and the sensor, the material sheets are accurately and slowly thrown above the material box for receiving the material sheets, and compared with sheet-drawing type falling, the phenomenon that the material sheets collide with the side flanges of the material box, and rebound or fragmentation is generated can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of silicon wafer sorting and unloading, in particular to a wafer dropping type wafer unloading mechanism. Background Art

[0002] In the production process of solar cells, the silicon rods need to be cut into silicon wafers first, and then the silicon wafers need to be cleaned. After cleaning, the silicon wafers need to be inspected. Generally, the silicon wafers are placed on a conveyor, and the inspection devices are set on both sides of the conveyor to gradually inspect the dirt, hidden cracks, edge defects, warping, etc. on the surface of the silicon wafers. After the inspection is completed, the silicon wafers need to be sorted from the conveyor and placed in the storage box.

[0003] The current equipment uses a pull-out type of sorting and blanking, which requires the cooperation of multiple branches to achieve blanking. When the silicon wafers are transferred between different branches, improper speed adjustment may easily cause wafer collision. In addition, during the pull-out blanking process, the material box is located on the side of the branch line. When the silicon wafers are transported to the material box along the transmission direction, they may hit the side guard of the material box and cause rebound or fragmentation. Utility Model Content

[0004] The utility model aims to provide a sheet dropping and unloading mechanism to solve the above-mentioned problems.

[0005] The technical solution of the utility model is: a sheet dropping and unloading mechanism, which comprises:

[0006] substrate;

[0007] An adsorption component, which is mounted on the substrate and is used to adsorb the material sheet;

[0008] A conveying component is installed on the substrate and is used to convey the material sheet adsorbed by the adsorption component.

[0009] Preferably, the adsorption assembly comprises a vacuum suction groove and a Bernoulli suction cup, and the adsorption surfaces of both are facing the sheet.

[0010] Preferably, the Bernoulli suction cup is located in the middle of the substrate, and is connected to an air supply pipe, which is controlled by a control valve.

[0011] Preferably, a plurality of vacuum suction grooves are provided along the length direction of the substrate, and negative pressure pipes are connected to the vacuum suction grooves, and the negative pressure pipes are controlled by control valve 2.

[0012] Preferably, a sheet falling sensor is installed on the substrate, and the sheet falling sensor is used to detect the position of the sheet and control the second control valve.

[0013] Preferably, the falling sheet sensor is an infrared sensor or a photoelectric sensor.

[0014] Preferably, the conveying assembly includes a conveyor belt, a conveyor pulley and a driving motor, the conveyor pulley is mounted on the base plate, and the driving motor drives the conveyor pulley to rotate to drive the conveyor belt mounted thereon to operate.

[0015] Preferably, the conveyor belt wheels include guide wheel one, guide wheel two and guide wheel three, guide wheel one is connected to the drive motor, and the height difference between guide wheel three and guide wheel one or guide wheel two is adjustable to adjust the tension of the conveyor belt.

[0016] Preferably, a connecting plate is provided on the base plate, a mounting plate which can slide along the thickness direction of the base plate and is fixed by a locking member is provided on the connecting plate, and the guide wheel three is provided on the mounting plate.

[0017] Preferably, the conveyor belt is provided with a plurality of adsorption channels corresponding to the positions of the adsorption components.

[0018] The beneficial effects of the utility model are: it is possible to achieve the adsorption and transfer of the material sheets without setting up branch lines, thereby avoiding the collision of silicon wafers when they are transferred between different branch lines; and through the cooperation of various components and sensors, the material sheets are accurately and slowly dropped above the wafer box, which can effectively avoid the material sheets from hitting the side guard of the box and causing rebound or fragmentation compared to the pull-out type sheet dropping. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of an embodiment of the utility model in a use state;

[0020] Figure 2 It is a three-dimensional structural diagram of an embodiment of the utility model;

[0021] Figure 3 It is a bottom view of an embodiment of the utility model;

[0022] Figure 4 It is a bottom view of the substrate in the embodiment of the utility model;

[0023] Figure 5 It is a connection diagram of the connecting plate and the mounting plate in the embodiment of the utility model.

[0024] In the figure:

[0025] 1. Substrate;

[0026] 2. Adsorption assembly; 2-1. Vacuum suction groove; 2-2. Bernoulli suction cup; 2-3. Negative pressure pipe; 2-4. Air supply pipe; 2-5. Control valve 1; 2-6. Control valve 2;

[0027] 3. Conveying assembly; 3-1. Conveying belt; 3-11. Adsorption channel; 3-2. Conveying belt wheel; 3-21. Guide wheel 1; 3-22. Guide wheel 2; 3-23. Guide wheel 3; 3-3. Driving motor;

[0028] 4. Sheet drop sensor;

[0029] 5. Splice material box;

[0030] 6. Connecting plate;

[0031] 7. Mounting plate; 7-1. Strip-shaped through hole;

[0032] 8. Locking parts;

[0033] 9. Sheet conveying equipment;

[0034] 10. Mounting bracket. DETAILED DESCRIPTION

[0035] The technical solution of the embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0036] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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 a limitation on the present utility model. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "set" and "connect" 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 directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood by specific circumstances.

[0037] Reference Figure 1-3The present embodiment provides a sheet-dropping and unloading mechanism, comprising a substrate 1, an adsorption component 2, a conveying component 3 and a sheet-dropping sensor 4. The substrate 1 is horizontally mounted above a sheet conveying device 9 and is arranged perpendicular to the direction of incoming materials. Its two ends are located on both sides of the sheet conveying device 9, and a sheet splicing box 5 is located below both ends of the substrate 1; the adsorption component 2, the conveying component 3 and the sheet-dropping sensor 5 are all arranged on the substrate 1. The adsorption component 2 can adsorb the sheet on the sheet conveying device 9. The production control system controls the running direction of the conveying component 3 according to the quality inspection result of the sheet. The conveying component 3 transfers the sheet adsorbed by the adsorption component 2 to the designated sheet splicing box 5; the sheet-dropping sensor 4 is located just above the sheet splicing box 5 to determine the position of the sheet. If the sheet is located above the sheet splicing box 5, the adsorption component 2 is controlled to release the adsorption effect on the sheet, so that the sheet falls on the sheet splicing box 5 under its own gravity.

[0038] By adopting the above technical solution, through the cooperation of various components and sensors, the sheets can be dropped accurately and slowly above the sheet material box 5. Compared with the sheet-pulling type sheet dropping, it can effectively prevent the sheets from hitting the side guard of the material box and causing rebound or fragmentation. In addition, there is no branch line design in the unloading mechanism, which can avoid chip collision accidents when the silicon wafers are transferred between different branches.

[0039] The above-mentioned adsorption assembly 2 includes a vacuum suction groove 2-1 and a Bernoulli suction cup 2-2. Figure 4 , the adsorption surfaces of both are facing the bottom of the substrate 1, that is, facing the sheet. The Bernoulli suction cup 2-2 is located in the middle of the substrate 1, and is used to adsorb the sheet on the sheet conveying device 9. A number of vacuum suction grooves 2-1 are arranged along the length direction of the substrate 1, and are used to cooperate with the conveying component 3 to convey the sheet to the two ends of the substrate 1. Compared with the vacuum suction grooves 2-1, under the same suction force, the Bernoulli suction cup 2-2 consumes less energy and gas. When the sheet is pressed close to the adsorption component 2, it is first non-contact adsorbed with the Bernoulli suction cup 2-2, and then it is adsorbed by the vacuum suction grooves 2-1 and contacts the conveying component 3. This process can effectively reduce the initial force when the sheet contacts the adsorption component 2, and prevent the sheet from being pressed and hitting the conveying component 3 at high speed, thereby causing sheet quality problems.

[0040] During implementation, a negative pressure pipe 2-3 is provided on the substrate 1 to connect the vacuum suction groove 2-1 and the vacuum generator, and an air supply pipe 2-4 is provided to connect the air source and the Bernoulli suction cup 2-2, wherein the vacuum generator is connected to the industrial control system signal, and a control valve 2-5 controlled by the industrial control system is provided on the air supply pipe 2-4, and the control valve 2-5 can control the opening and closing of the air supply pipe 2-4, and a control valve 2-6 is provided on the negative pressure pipe 2-3, and the control valve 2-6 is controlled by the falling sheet sensor 4.

[0041] During implementation, a sheet falling sensor can be set just above the sheet splicing box, and a control valve 2-6 can be set on the negative pressure tube 2-3 connected to the vacuum suction groove 2-1 located above the sheet splicing box 5. When the sheet falling sensor senses that a sheet is passing above the sheet splicing box, the sheet falling sensor 5 transmits the sensing signal to the industrial control system, and the industrial control system adjusts the opening of the control valve 2-6 to release the corresponding vacuum suction groove 2-1 from adsorbing the sheet, so that the sheet slowly falls onto the sheet splicing box.

[0042] In some feasible implementation schemes, the control valve 2 - 5 and the control valve 2 - 6 can both be electromagnetic valves, and the chip falling sensor 5 can be an infrared sensor or a photoelectric sensor.

[0043] The conveyor assembly 3 includes a conveyor belt 3-1, a conveyor belt wheel 3-2 and a driving motor 3-3. The conveyor belt 3-1 wheel is installed on the substrate 1. The driving motor 3-3 drives the conveyor belt wheel 3-2 to rotate, so as to drive the conveyor belt 3-1 wound thereon to operate. During implementation, a plurality of parallel sets of sheet-dropping unloading mechanisms are arranged along the sheet conveying direction. The running directions of the driving motors 3-3 on each set of unloading mechanisms are independently controlled by the industrial control system and can be the same or different, so as to transfer the sheets adsorbed by the adsorption assembly 2 along a specified direction. When the front-end production capacity, the rear-end production capacity, etc. change, the industrial control system can freely switch the running direction of the driving motors 3-3 on each set of unloading mechanisms, that is, in the previous production period, the driving motor 3-3 on a certain unloading mechanism can drive the conveyor belt 3-1 to transfer the sheets to one end of the substrate 1. In the next production period, due to changes in production demand, the driving motor 3-3 on the unloading structure can run in the reverse direction to drive the conveyor belt 3-1 to transfer the sheets to the other end of the substrate 1.

[0044] In some specific embodiments, the conveyor belt wheel 3-2 is configured to include a guide wheel 1 3-21, a guide wheel 2 3-22 and a guide wheel 3 3-23. The guide wheel 1 3-21 is connected to the driving motor 3-3 and acts as a driving wheel to drive the conveyor belt 3-1 to operate; the guide wheel 2 3-22 acts as a transmission wheel to provide support for the conveyor belt 3-1; the guide wheel 3 3-23 is movably arranged on the base plate 1, and the height difference between it and the guide wheel 1 3-21 or the guide wheel 2 3-22 is adjustable to adjust the tension of the conveyor belt 3-23.

[0045] During implementation, a connecting plate 6 can be set on the base plate 1. On the one hand, the connecting plate 6 can be used as a connecting facility for installing the unloading mechanism on the frame above the sheet transmission equipment. On the other hand, a mounting plate 7 is set on the connecting plate 6, which can slide along the thickness direction of the base plate 1 and is fixed by a locking member 8. The guide wheel three 3-23 is set on the mounting plate 7. By adjusting the position of the mounting plate 7 on the connecting plate 6, that is, adjusting the distance between the guide wheel three 3-23 and the base plate 1, the tension of the conveyor belt 3-1 can be adjusted.

[0046] The connection method of the connecting plate 6 and the mounting plate 7 can be configured according to actual use requirements, and is not specifically limited here. Only some feasible implementation schemes are exemplified, such as the attached Figure 5 As shown, a strip-shaped through hole 7-1 can be provided on the connecting plate 6 and the mounting plate 7, the length of the strip-shaped through hole 7-1 is in the same direction as the thickness direction of the substrate 1, and a locking member 8, such as a locking bolt, is passed through the strip-shaped through hole 7-1.

[0047] There are many different solutions for the position configuration of the guide wheel 1 3-21 and the guide wheel 2 3-22, which can be selected as needed during implementation. For example, the guide wheel 1 3-21 and the guide wheel 2 3-22 can be respectively arranged at the two ends of the base frame 1. Figure 1 and 2 As shown, a mounting frame 10 is arranged on the top of the substrate 1, a guide wheel 3-21 and a driving motor 3-3 are arranged on the mounting frame 10, and guide wheels 3-22 are arranged on both sides of the mounting frame 10 and at both ends of the substrate 1, respectively, to guide the conveyor belt 3-1 and limit it in the thickness direction.

[0048] During implementation, the conveyor belt 3-1 can be located directly below the vacuum suction groove 2-1 or on its side. If the conveyor belt 3-1 is located directly below the vacuum suction groove 2-1, a plurality of adsorption channels 3-11 corresponding to the positions of the vacuum suction groove 2-1 should be provided on the conveyor belt 3-1.

[0049] Compared with the prior art, the beneficial effects of the utility model are: it is possible to achieve the adsorption and transfer of the material sheets without setting up branch lines, thereby avoiding the collision of silicon wafers when they are transferred between different branch lines; and through the cooperation of various components and sensors, the material sheets are accurately and slowly dropped above the wafer box 5. Compared with the pull-out type sheet dropping, it can effectively avoid the material sheets from hitting the side guard of the box and causing rebound or fragmentation.

[0050] The above are preferred implementations of the present utility model. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present utility model. These improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A sheet dropping and unloading mechanism, characterized in that: include: substrate; An adsorption component, which is mounted on the substrate and is used to adsorb the material sheet; A conveying component, which is mounted on the substrate and is used to convey the material sheet adsorbed by the adsorption component; The adsorption assembly includes a vacuum suction groove and a Bernoulli suction cup, and the adsorption surfaces of the two are both facing the sheet; The Bernoulli suction cup is located in the middle of the substrate, and is connected to an air supply pipe, which is controlled by a control valve 1; The vacuum suction grooves are provided in a plurality along the length direction of the substrate, and are connected with negative pressure pipes, and the negative pressure pipes are controlled by control valve 2; A sheet falling sensor is installed on the substrate, and the sheet falling sensor is used to detect the position of the sheet and control the second control valve.

2. The sheet dropping and unloading mechanism according to claim 1, characterized in that: The falling sheet sensor is an infrared sensor or a photoelectric sensor.

3. The sheet dropping and unloading mechanism according to claim 1, characterized in that: The conveying assembly comprises a conveyor belt, a conveyor belt wheel and a driving motor. The conveyor belt wheel is installed on the base plate. The driving motor drives the conveyor belt wheel to rotate so as to drive the conveyor belt mounted thereon to operate.

4. The sheet dropping and unloading mechanism according to claim 3 is characterized in that: The conveyor belt wheels include guide wheel one, guide wheel two and guide wheel three. The guide wheel one is connected to the driving motor. The height difference between the guide wheel three and the guide wheel one or the guide wheel two is adjustable to adjust the tension of the conveyor belt.

5. The sheet dropping and unloading mechanism according to claim 4 is characterized in that: A connecting plate is provided on the base plate, a mounting plate which can slide along the thickness direction of the base plate and is fixed by a locking member is provided on the connecting plate, and the guide wheel three is provided on the mounting plate.

6. The sheet dropping and unloading mechanism according to claim 4 or 5, characterized in that: The conveyor belt is provided with a plurality of adsorption channels corresponding to the positions of the adsorption components.

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