A packaging apparatus, packaging line and packaging method for silicon ingots

Abstract

This invention relates to packaging equipment, a packaging production line, and a packaging method for silicon material boxing. The silicon material boxing packaging equipment includes a coarse counterweight feeder, a fine counterweight feeder disposed downstream of the coarse counterweight feeder, and a weighing conveyor connecting the coarse and fine counterweight feeders. The coarse counterweight feeder includes a first frame, a first hopper, a distributor, a vibrating feeder, and an overflow pipe. This invention, through coarse and fine counterweighting and a three-stage feeding method, ensures both packaging speed and the reliability of the silicon material packaging weight. During coarse counterweighting, the silicon material can be fed at maximum efficiency without considering weight weighing accuracy requirements. During fine counterweighting, the hopper is very close to the required packaging weight; by feeding at a small flow rate until the set weight is reached, very high accuracy in hopper weighing can be ensured, while the overall weighing process is also highly efficient.

Description

Technical Field

[0001] This invention relates to the field of packaging technology, and in particular to a packaging equipment, packaging production line, and packaging method for packaging silicon materials. Background Technology

[0002] In the polysilicon production process, the weight of each batch of polysilicon needs to be controlled and standardized, and then packaged. Currently, most manufacturers still manually receive the bagged material, manually add weight, and manually pack it into boxes. Existing technologies also use a combination of automatic feeders and weighing devices to control the packaging weight. However, there is a delay between the weighing device receiving the weight signal and feeding back to the automatic feeder to stop feeding, which causes a deviation in the final packaged weight. This deviation is particularly large the faster the feeding speed, making it impossible to guarantee controllable packaging weight of the polysilicon. Summary of the Invention

[0003] Therefore, it is necessary to provide a packaging equipment, packaging production line, and packaging method for silicon material boxing to address the problems of large weighing errors and low packaging efficiency in silicon material packaging.

[0004] A packaging device for boxing silicon material includes a coarse counterweight feeder, a fine counterweight feeder disposed downstream of the coarse counterweight feeder, and a weighing conveyor for connecting the coarse counterweight feeder and the fine counterweight feeder.

[0005] The coarse counterweight feeder is used to feed large amounts of material into the hopper, and the coarse counterweight feeder includes:

[0006] First rack;

[0007] The first hopper is installed on top of the first frame;

[0008] A vibrating feeder is installed on the first frame. The feed end of the vibrating feeder is connected to the discharge end of the first hopper. Its discharge end is set towards the weighing conveyor. The discharge end of the vibrating feeder is used to output large materials.

[0009] The precision counterweight feeder is used to feed medium and small materials into the hopper. The precision counterweight feeder includes:

[0010] Second rack;

[0011] The second hopper is installed on top of the second frame;

[0012] A primary feeder is installed on the second frame, and the feed end of the primary feeder is connected to the discharge end of the second hopper;

[0013] Two secondary feeders are installed on the second frame. The conveying channels of the two secondary feeders are set to be one wide and one narrow. The inlet end of both secondary feeders is connected to the outlet end of the primary feeder. The outlet ends of both secondary feeders are set towards the weighing conveyor. The outlet end of the wider secondary feeder is used to output medium material, and the trough of the narrower secondary feeder is set to V-shape, and its outlet end is used to output small material.

[0014] As a preferred embodiment, the first silo has two non-interconnected compartments inside, and a distributor for distributing materials to the two compartments is installed on the top; an overflow pipe is also installed on the first frame, and the inlet end of the overflow pipe is connected to the outlet end of one of the compartments.

[0015] As a preferred example, the distributor includes:

[0016] The material distribution hopper is installed on top of the first silo via a sliding guide rail, and the discharge port of the material distribution hopper is connected to one of the silo chambers.

[0017] A driving component, the fixed end of which is mounted on the first frame, and the movable end of which is fixedly connected to the distributing hopper, is used to drive the distributing hopper to slide on the top of the first hopper;

[0018] A material level sensor is used to detect the material level height information in the silo and control the drive component to operate based on the material level height information.

[0019] As a preferred embodiment, the top of the first silo is provided with a dust cover, and a dust curtain is provided on the dust cover; a dustproof soft sleeve is provided between the first silo and the silo chamber.

[0020] As a preferred embodiment, the discharge end of the primary feeder is provided with a V-shaped guide plate, and a wide and narrow discharge channel is formed between the guide plate and the material trough of the primary feeder. The wider discharge channel is connected to the wider secondary feeder, and the narrower discharge channel is connected to the narrower secondary feeder.

[0021] As a preferred example, both the coarse counterweight feeder and the fine counterweight feeder are equipped with multiple negative pressure suction ports, which are used to ensure that the generated dust is recovered in a timely manner.

[0022] As a preferred example, all parts in contact with the material are coated with a polyurethane coating.

[0023] A packaging production line for silicon material boxing utilizes the silicon material boxing packaging equipment described above. The packaging equipment consists of two sets. Upstream of each set of packaging equipment is a material elevator for feeding material into the coarse counterweight feeder. Downstream of each set are sequentially equipped with a weight re-inspection machine and a rejection machine for rejecting boxes whose filling weight does not meet the standard. Upstream of both sets of packaging equipment is a common transfer conveyor for transporting empty boxes to the packaging equipment.

[0024] A packaging method for silicon cartoning, which utilizes the silicon cartoning packaging equipment and packaging production line described above, includes the following steps:

[0025] Step S1: The empty hopper is moved to the discharge end of the coarse counterweight feeder by the transfer conveyor, and at the same time the material elevator feeds the initial material into the coarse counterweight feeder.

[0026] Step S2: The initial material is fed evenly by the coarse counterweight feeder, and the large pieces of the initial material fall quickly into the material box below. When the weight of the material box reaches the first set value by the weighing conveyor, the coarse counterweight feeder stops feeding. Then the weighing conveyor sends the material box to the fine counterweight feeder.

[0027] Step S3: The material in the second hopper of the fine counterweight feeder is all fine material. When the hopper containing large material enters the fine counterweight feeder, the second hopper of the fine counterweight feeder feeds material to the secondary feeder. First, the wider secondary feeder pours medium material into the hopper. When the weighing conveyor detects that the weight of the hopper reaches the second set value, the wider secondary feeder stops, and the narrower secondary feeder starts running, continuing to pour small material into the hopper until the weighing conveyor detects that the weight of the hopper reaches the third set value.

[0028] Step S4: The bins that have reached the third set value continue to move on the weighing conveyor to the weight re-inspection machine for weight verification. The bins with qualified weight continue to move to the finished product outlet, while the bins with unqualified weight are rejected by the rejection machine.

[0029] As a preferred example, in step S3, fine materials are added to the second silo in advance, and a material level sensor is installed in the second silo. When the material level sensor detects that the material in the second silo is insufficient, it reminds the staff to add more material.

[0030] The beneficial effects of this invention are as follows:

[0031] 1. This invention employs a two-stage weighting process (coarse and fine weighting) and a three-stage feeding method to ensure both packaging speed and the reliability of the silicon material packaging weight. During coarse weighting, the silicon material can be fed at maximum speed without considering weight accuracy requirements, ensuring feeding efficiency. During fine weighting, the material bin is very close to the required packaging weight. At this point, a small flow rate of material is fed until the set weight is reached, ensuring very high accuracy in weighing the material bin while maintaining high efficiency throughout the entire weighing process.

[0032] 2. Compared to manual packing and existing technologies, this invention firstly saves manpower and avoids the uncontrollability caused by worker conditions. Secondly, the weighing process is fully automated, greatly improving work efficiency and further enhancing the reliability of material weight. Simultaneously, since there is some dust at the silicon material outlet, the packaging production line can avoid the health risks of long-term worker exposure. Attached Figure Description

[0033] Figure 1 A three-dimensional structural diagram of the coarse counterweight feeder;

[0034] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;

[0035] Figure 3 for Figure 1 A partial structural diagram of the distributor;

[0036] Figure 4 A three-dimensional structural diagram of a precision counterweight feeder;

[0037] Figure 5 for Figure 4 A schematic diagram of the connection structure between the primary feeder and the secondary feeder;

[0038] Figure 6 This is a schematic diagram of the packaging production line layout.

[0039] In the diagram: 1. Coarse counterweight feeder, 11. First frame, 12. First hopper, 13. Distributor, 131. Sliding guide rail, 132. Drive unit, 133. Vibrating feeder, 14. Overflow pipe, 15. Adjusting gate, 16. Fine counterweight feeder, 2. Second frame, 21. Second hopper, 22. Primary feeder, 23. Secondary feeder, 24. Guide plate, 25. Weighing conveyor, 3. Dust cover, 4. Negative pressure air intake, 5. Material elevator, 6. Weight re-inspection machine, 7. Rejection machine, 8. Transfer conveyor, 9. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] It should be noted that when a component is said to be "installed on" another component, it can be directly on the other component or it may be in a component that is centered on it. When a component is said to be "set on" another component, it can be directly set on the other component or it may also be in a component that is centered on it. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or it may also be in a component that is centered on it.

[0042] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0044] A packaging device for packaging silicon material includes a coarse counterweight feeder, a fine counterweight feeder disposed downstream of the coarse counterweight feeder, and a weighing conveyor for connecting the coarse counterweight feeder and the fine counterweight feeder, serving to transport and weigh the material bins.

[0045] Please refer to Figure 1 and Figure 2 The coarse counterweight feeder 1 is used to feed large quantities of silicon material (silicon material with a large flow rate per unit time) into the hopper. In this embodiment, the coarse counterweight feeder 1 includes a first frame 11, a first hopper 12, a distributor 13, a vibrating feeder 14, and an overflow pipe 15. The first frame 11 is a metal support fixed to the ground, serving as the main body of the coarse counterweight feeder 1 and used to install the various components. The first hopper 12 is installed on top of the first frame 11, and the first hopper 12 has two non-interconnected compartments: a first compartment and a second compartment. Figure 3 As shown, the distributor 13 includes a distributing hopper 131 and a drive unit 133. The distributing hopper 131 is horizontally mounted on top of the first hopper 12 via a sliding guide rail 132, spanning across the two chambers. The drive unit 133 can be an electric cylinder, a pneumatic cylinder, or a hydraulic cylinder. The fixed end of the drive unit 133 is mounted on the first frame 11, while the movable end is fixedly connected to one side of the distributing hopper 131. The movement of the movable end causes the distributing hopper 131 to slide on top of the first hopper 12, allowing the bottom outlet of the distributing hopper 131 to adjust between the two chambers. Silicon material enters different chambers through the position adjustment of the distributing hopper 131. A vibrating feeder 14 is mounted on the first frame 11, and its feed end is connected to the discharge end of the first chamber. Silicon material from the upstream process is fed into the first chamber by the material elevator 6. The first chamber is the initial chamber into which the silicon material enters. The discharge end of the vibrating feeder 14 is positioned towards the weighing conveyor 3. The vibratory feeder 14 can be a commercially available GZ series electromagnetic vibratory feeder from Nantong CJ Vibration Machinery Manufacturing Co., Ltd. The weighing conveyor 3 is a non-standard component; any commercially available model can be used, capable of weighing the material while conveying it to the bin. Further details are omitted here. The vibratory feeder 14 uniformly, continuously, and rapidly feeds the silicon material in the first chamber into the bin on the weighing conveyor 3 in large quantities. At this point, the silicon material can be fed into the bin at maximum speed without concern for incorrect weighing during packaging.

[0046] On the other hand, a level sensor is fixedly connected to the inner wall of the first compartment to detect the material level. When the level sensor detects that the material level in the first compartment is too high, it transmits the material level information to the central control unit and controls the drive unit 133 to start, moving the distributing hopper 131 to connect with the second compartment. The discharge end of the second compartment is connected to the overflow pipe 15, and the discharge end of the overflow pipe 15 is connected to the temporary turnover box. With the above settings, when upstream or downstream equipment is under maintenance or malfunctions, the equipment can still operate, waiting for the relevant equipment to be repaired, thus facilitating the automated design and operation of the entire packaging process.

[0047] Please refer to Figure 4 The precision counterweight feeder 2 is used to feed medium-sized silicon (silicon with a medium flow rate per unit time) and small-sized silicon (silicon with a small flow rate per unit time) into the hopper. In this embodiment, the precision counterweight feeder 2 includes a second frame 21, a second hopper 22, a primary feeder 23, and a secondary feeder 24. The second frame 21 is also a metal support fixed to the ground, serving as the main body of the precision counterweight feeder 2 and used to mount the various components. The second hopper 22 is installed on top of the second frame 21. The primary feeder 23 is also installed on the second frame 21, and its inlet end is connected to the outlet end of the second hopper 22. Notably, there are two secondary feeders 24. Figure 5As shown, the conveying channels of the two secondary feeders 24 are arranged with one wide and one narrow, and the inlet ends of both secondary feeders 24 are connected to the outlet end of the primary feeder 23. To facilitate the receiving of material by the two secondary feeders 24, a guide plate 25 is provided at the outlet end of the primary feeder 23, forming a wide and narrow discharge channel between the guide plate 25 and the material trough of the primary feeder 23. The silicon material is distributed to the two secondary feeders 24 through the discharge channels of different widths. Among them, the wider secondary feeder 24 receives more silicon material, and the silicon material is fed from the secondary feeder 24 into the material bin on the weighing conveyor 3 at a moderate speed (the material bin has already been filled with most of the silicon material by the coarse counterweight feeder 1). The narrower secondary feeder 24 dispenses less silicon material, which is then fed at a lower speed into the hopper on the weighing conveyor 3 (the hopper is partially refilled by the wider secondary feeder 24) until the hopper reaches the standard packaging weight. Furthermore, the feed trough of the narrower secondary feeder 24 is V-shaped. The silicon material entering the secondary feeder 24 accumulates at the bottom of the V-shape and continues to be fed. Because the feed flow rate of the narrower secondary feeder 24 is very small, very high weighing accuracy is achieved.

[0048] In this embodiment, both the primary feeder 23 and the secondary feeder 24 can be the same model as the vibrating feeder 14, or other commercially available compatible models, as long as they can feed the material evenly. Adjustable gates 16 are also provided on the feed troughs of the vibrating feeder 14 and the primary feeder 23. These gates allow manual adjustment of the cross-sectional area of ​​the feed trough via bolts, thereby regulating the feeding speed of the silicon material. In this embodiment, due to the special properties of silicon material, it is susceptible to metal contamination. Therefore, a polyurethane coating is provided on all parts that come into contact with the silicon material. These parts include, but are not limited to, the hopper and the inner wall of the vibrating feeder 14. Considering dust pollution, covers are provided on both the coarse counterweight feeder 1 and the fine counterweight feeder 2, and multiple negative pressure suction ports 5 are provided on these covers. The air inlets of multiple negative pressure suction ports 5 should ideally be directed towards areas prone to dust generation, such as the junction of the primary feeder 23 and the secondary feeder 24, the discharge end of the vibrating feeder 14, and the discharge end of the secondary feeder 24. The negative pressure suction ports 5 are connected to negative pressure pipelines during use to ensure timely removal of generated dust, maintaining equipment cleanliness and workshop hygiene. A dust cover 4 is installed on the top of the first silo 12. A dust curtain is installed on the dust cover 4. Dustproof soft sleeves and other measures are also installed between the first silo 12 and the silo chamber to minimize dust emission and protect the working environment.

[0049] Compared to traditional manual packaging and existing technologies, this silicon material boxing packaging equipment uses a two-stage weighting system with coarse and fine counterweight feeders to ensure both packaging speed and reliable silicon material weight. The equipment features a small weighing error in the hopper, saves manpower, and improves work efficiency. This silicon material boxing packaging equipment is more suitable for automated production.

[0050] Please see Figure 6 In another embodiment, based on the packaging equipment for silicon cartoning, this embodiment also proposes a silicon cartoning packaging production line. The packaging production line further includes a material elevator 6, a weight re-inspection machine 7, a rejection machine 8, and a transfer conveyor 9. This packaging production line is based on the aforementioned packaging equipment and includes two sets of packaging equipment. The upstream of both sets of packaging equipment is connected to the material elevator 6, which feeds material into the first hopper 12 of the coarse counterweight feeder 1. The weight re-inspection machine 7 and the rejection machine 8 are sequentially arranged downstream of each set of packaging equipment. That is, the material elevator 6, packaging equipment, weight re-inspection machine 7, and rejection machine 8 form two sub-production lines. In this embodiment, the transfer conveyor 9 includes a vertical conveyor line and a horizontal conveyor line. The vertical conveyor line is located at and extends from the unloading end of the two coarse counterweight feeders and is connected to the weighing conveyor 3. One end of the horizontal conveyor line is connected to the vertical conveyor line, and the other end is the placement area for an empty hopper (in this embodiment, it is...). Figure 6 (Point A in the diagram). The material bin is also transported by the transfer conveyor 9 from the fine counterweight feeder 2 to the weight re-inspection machine 7 and the rejection machine 8, until it reaches the finished product outlet (in this embodiment, ). Figure 6 (See point B in the diagram). Right-angle turning and changing mechanisms are installed between the horizontal and vertical conveyor lines, and between the vertical conveyor line and the weighing conveyor 3. This is a common practice among those skilled in the art and will not be elaborated upon here. This silicon material boxing packaging production line saves manpower, as the entire operation is automated. Furthermore, combined with the packaging equipment, it can further improve packaging speed and efficiency while ensuring reliable weighing.

[0051] In another embodiment, based on the packaging equipment and production line for silicon cartoning, this embodiment also proposes a packaging method for silicon cartoning. It includes the following steps:

[0052] Step S1: The empty material bin (lined with polyurethane coating) is first transferred from the horizontal conveyor line to the vertical conveyor line, and then transported by the vertical conveyor line to the discharge end of each coarse counterweight feeder 1. At the same time, the material elevator 6 puts the initial silicon material into the first hopper 12 in the coarse counterweight feeder 1.

[0053] Step S2: The initial silicon material is uniformly fed by the coarse counterweight feeder 1, and the large pieces of the initial silicon material fall into the material box at the lower discharge end. When the weight of the material box reaches the first set value after being weighed by the weighing conveyor 3, the coarse counterweight feeder 1 stops feeding, and then the weighing conveyor 3 sends the material box to the fine counterweight feeder 2.

[0054] In step S3, the silicon material in the second hopper 22 of the fine counterweight feeder 2 is also fed in by the material elevator 6. The material in the material elevator 6 is all fine material (i.e., uniform fine-particle silicon material), and only fine material exists in the second hopper 22. Silicon material can also be added in advance and stored in the second hopper 22. At the same time, a material level sensor is installed in the second hopper 22. When the material level sensor detects that the silicon material in the second hopper is insufficient, it reminds the staff to add new silicon material in time. When the hopper containing large material enters the fine counterweight feeder 2, the silicon material in the second hopper 22 falls to the secondary feeder 24. First, the wider secondary feeder 24 pours medium material into the hopper. When the weighing conveyor 3 detects that the weight of the hopper has reached the second set value, the wider secondary feeder 24 stops, and the narrower secondary feeder 24 starts running, continuing to pour small material into the hopper until the weighing conveyor 3 detects that the weight of the hopper has reached the third set value. The third setting is the required packaging weight.

[0055] Step S4: The bins that have reached the third set value continue to move on the weighing conveyor 3 to the weight re-inspection machine 7 for weight verification. The weight re-inspection machine 7 measures the weight of the bins again. Bins with qualified weights continue to move to the finished product outlet. Bins with unqualified weights are removed from the weighing conveyor 3 and rejected when they pass the rejection machine 8.

[0056] In this embodiment, the silicon material packaging method solves the problems of large silicon material blocks and large weighing errors in traditional methods by using two-stage weighting (coarse and fine) and three-stage feeding. During coarse weighting, the silicon material can be fed in at maximum efficiency without considering the required weighing accuracy. During fine weighting, the material box is very close to the weight required for packaging. At this point, a small flow rate of material is fed until the set weight is reached, thus ensuring very high accuracy in weighing the material box while maintaining high efficiency throughout the entire weighing process.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A packaging device for boxing silicon material, characterized in that, It includes a coarse counterweight feeder (1), a fine counterweight feeder (2) disposed in the downstream process of the coarse counterweight feeder (1), and a weighing conveyor (3) for connecting the coarse counterweight feeder (1) and the fine counterweight feeder (2). The coarse counterweight feeder (1) is used to feed large amounts of material into the hopper. The coarse counterweight feeder (1) includes: First rack (11); The first hopper (12) is installed on the top of the first frame (11); the first hopper (12) has two non-connected chambers inside, and a distributor (13) for distributing materials to the two chambers is installed on the top; an overflow pipe (15) is also installed on the first frame (11), and the inlet end of the overflow pipe (15) is connected to the outlet end of one of the chambers. A vibrating feeder (14) is installed on the first frame (11). The feed end of the vibrating feeder (14) is connected to the discharge end of the first hopper (12). Its discharge end is set towards the weighing conveyor (3). The discharge end of the vibrating feeder (14) is used to output large materials. The precision counterweight feeder (2) is used to feed medium and small materials into the material box. The precision counterweight feeder (2) includes: Second rack (21); The second hopper (22) is installed on top of the second frame (21); A primary feeder (23) is installed on the second frame (21). The feed end of the primary feeder (23) is connected to the discharge end of the second hopper (22). The discharge end of the primary feeder (23) is provided with a V-shaped guide plate (25). The guide plate (25) and the trough of the primary feeder (23) form a wide and narrow feeding channel. The wider feeding channel is connected to the wider secondary feeder (24), and the narrower feeding channel is connected to the narrower secondary feeder (24). Two secondary feeders (24) are installed on the second frame (21). The conveying channels of the two secondary feeders (24) are respectively set to be one wide and one narrow. The feed ends of the two secondary feeders (24) are connected to the discharge ends of the primary feeder (23). Their discharge ends are both set towards the weighing conveyor (3). The discharge end of the wider secondary feeder (24) is used to output medium material, and the material trough of the narrower secondary feeder (24) is set to be V-shaped. Its discharge end is used to output small material.

2. The packaging equipment for boxing silicon material according to claim 1, characterized in that, The distributor (13) includes: The material distribution hopper (131) is installed on top of the first silo (12) via a sliding guide rail (132), and the discharge port of the material distribution hopper (131) is connected to one of the silos. The driving component (133) has its fixed end mounted on the first frame (11), and its movable end is fixedly connected to the distributing hopper (131), which is used to drive the distributing hopper (131) to slide on the top of the first silo (12). A material level sensor is used to detect the material level height information in the silo and control the drive unit (133) to work based on the material level height information.

3. The packaging equipment for boxing silicon material according to claim 1, characterized in that, The top of the first silo (12) is provided with a dust cover (4), and a dust curtain is provided on the dust cover (4); a dust cover is provided between the first silo (12) and the silo chamber.

4. The packaging equipment for boxing silicon material according to claim 1, characterized in that, Both the coarse counterweight feeder (1) and the fine counterweight feeder (2) are equipped with multiple negative pressure suction ports (5) to ensure that the generated dust is recovered in a timely manner.

5. The packaging equipment for boxing silicon material according to claim 1, characterized in that, All parts that come into contact with the material are coated with polyurethane.

6. A packaging production line for silicon cartoning, which uses the silicon cartoning packaging equipment as described in any one of claims 1 to 5, characterized in that, The packaging equipment is provided in two sets. Upstream of each set of packaging equipment is a material elevator (6), which is used to feed material into the coarse counterweight feeder (1) alone, or into the coarse counterweight feeder (1) and the fine counterweight feeder (2). Downstream of each set of packaging equipment is a weight re-inspection machine (7) and a rejection machine (8), which is used to reject the material boxes whose loading weight does not meet the standard. Upstream of the two sets of packaging equipment is also connected to a transfer conveyor (9), which is used to transport empty material boxes to the packaging equipment.

7. A method for packaging silicon material into boxes, which utilizes the packaging production line described in claim 6, characterized in that, Includes the following steps: Step S1: The empty hopper is moved to the discharge end of the coarse counterweight feeder (1) by the transfer conveyor (9), and at the same time the material elevator (6) feeds the initial material into the coarse counterweight feeder (1). Step S2: The initial material is fed evenly by the coarse counterweight feeder (1), and the large material in the initial material falls quickly into the material box below. When the weight of the material box reaches the first set value by the weighing conveyor (3), the coarse counterweight feeder (1) stops feeding. Then the weighing conveyor (3) sends the material box to the fine counterweight feeder (2). Step S3: The material in the second hopper (22) of the fine counterweight feeder (2) is all fine material. When the hopper containing large material enters the fine counterweight feeder (2), the second hopper (22) of the fine counterweight feeder feeds material to the secondary feeder (24). First, the wider secondary feeder (24) pours medium material into the hopper. When the weighing conveyor (3) detects that the weight of the hopper reaches the second set value, the wider secondary feeder (24) stops, and the narrower secondary feeder (24) starts running and continues to pour small material into the hopper until the weighing conveyor (3) detects that the weight of the hopper reaches the third set value. Step S4: The bin that reaches the third set value continues to move on the weighing conveyor (3) to the weight re-inspection machine (7) for weight verification. The bin with qualified weight continues to move to the finished product outlet, and the bin with unqualified weight is rejected by the rejection machine (8).

8. The packaging method for silicon material in boxes according to claim 7, characterized in that, In step S3, fine materials are added to the second silo (22) in advance, and a material level sensor is installed in the second silo (22). When the material level sensor detects that the material in the second silo (22) is insufficient, it reminds the staff to add more material.

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