Automatic oil pressure molding device for powder material

Abstract

The utility model relates to the technical field of powder material processing, and disclose a powder material automatic oil pressure forming device, the moisture content detection unit is set up in one side of feeding calender unit, the kneading forming unit is set up in one side of moisture content detection unit, the material pelletizing unit is set up in one side of the kneading forming unit far from moisture content detection unit, the screening discharge unit is set up in one side of material pelletizing unit, the circulating baking unit is set up in one side of moisture content detection unit, the feeding calender unit includes vibration material arranging disc, vibration material arranging disc one side is provided with calender. The powder material automatic oil pressure forming device, 7-10 people / shift are saved compared to traditional production line, the circulating baking unit adopts three kinds of time batch parallel circulation technology, eliminates 72 hours baking air window period, makes single line productivity to improve more than 40% (measured reaches 200kg / h), cooperates with siemens PLC industrial ethernet high speed communication (response is less than or equal to 0.1s) and step conveyor dynamic speed regulation, and material circulation efficiency improves 35%.

Description

Technical Field

[0001] This utility model relates to the field of powder processing technology, specifically to an automatic hydraulic molding device for powder. Background Technology

[0002] In the processing of powdered materials (such as certain chemical raw materials, ceramic powders, pharmaceutical intermediates, food additives, etc.), hydraulic molding is a common process used to compress powders into specific shapes or dense blanks for subsequent processing (such as baking and curing, pelletizing, polishing, screening, etc.). Traditional hydraulic molding processes for powdered materials typically involve several key steps, including: powder feeding and calendering, material moisture content detection, cyclic baking and curing, kneading and molding, material pelletizing, double-cone polishing, and vibrating sieving.

[0003] Currently, hydraulic molding is mainly done manually, which is cumbersome and labor-intensive. With increasing market demand, manual production efficiency can no longer meet capacity requirements. Therefore, in order to improve production efficiency and reduce manual workload, the existing hydraulic molding equipment needs to be redesigned and planned to achieve production automation and meet production needs. The design follows the principles of compact layout and optimal efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an automatic hydraulic molding device for powdered materials to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic hydraulic molding device for powdered materials, including a feeding and calendering unit, a moisture content detection unit on one side of the feeding and calendering unit, a kneading and molding unit on one side of the moisture content detection unit, a material pelletizing unit on the side of the kneading and molding unit away from the moisture content detection unit, a screening and discharge unit on one side of the material pelletizing unit, and a circulating baking unit on one side of the moisture content detection unit;

[0006] The feeding and calendering unit includes a vibrating feeder, a calender is provided on one side of the vibrating feeder, a circulating conveyor belt is provided on one side of the calender, a feeding mechanism is provided on the top of the circulating conveyor belt, a lifting and unloading mechanism is provided on the inner side of the circulating conveyor belt, and an AGV feeding forklift is provided on one side of the circulating conveyor belt.

[0007] Preferably, the moisture content detection unit includes a moving guide rail, a transfer robot is installed on the top of the moving guide rail, a cleaning robot is installed on the inner side of the moving guide rail, a return conveyor belt is installed on one side of the cleaning robot, and a moisture content detection device is installed on one side of the moving guide rail.

[0008] Preferably, the circulating baking unit includes an oven, with a feeding conveyor belt and an unloading conveyor belt respectively provided on one side of the oven, and a storage robot provided on one side of the feeding conveyor belt.

[0009] Preferably, the kneading and forming unit includes a kneader, a corner cage type preforming system is provided on one side of the kneader, a feeding hopper and a feeding conveyor belt are provided on one side of the corner cage type preforming system, a three-component glue supply system is provided on one side of the kneader, and a transfer robot is provided on one side of the kneader.

[0010] Preferably, the material pelletizing unit includes a press, a folding drying rack is provided on one side of the press, a telescopic conveyor belt is provided on one side of the folding drying rack, a cutting machine is provided on one side of the telescopic conveyor belt, a temporary storage box is provided on one side of the cutting machine, a transfer robot is provided on one side of the telescopic conveyor belt, and a moving guide rail is provided on one side of the transfer robot.

[0011] Preferably, the screening and discharge unit includes a double-cone polishing machine, a screw extruder is provided on one side of the double-cone polishing machine, a storage silo is provided on one side of the screw extruder, a distributing hopper is provided on one side of the storage silo, a walking conveyor belt is provided on one side of the double-cone polishing machine, a cage vibrating screen is provided on one side of the walking conveyor belt, a lifting and feeding machine is provided on one side of the cage vibrating screen, a material unloading robot is provided on one side of the walking conveyor belt, and a moving guide rail is provided on one side of the material unloading robot.

[0012] Compared with the prior art, the present invention provides an automatic hydraulic molding device for powdered materials, which has the following advantages:

[0013] 1. This automatic hydraulic molding device for powdered materials seamlessly integrates AGV forklifts, lifting and unloading equipment, stepping conveyors, warehouse robots for baking and stacking, corner cage preforming systems, explosion-proof compartments for automatic pelletizing, and double cone polishing and screening. The number of manual intervention points on the entire line is reduced to only 3 (non-conforming product recycling / equipment monitoring), saving 7-10 people per shift compared to traditional production lines. The circulating baking unit adopts three types of time batch parallel flow technology, eliminating the 72-hour baking gap period, increasing single-line capacity by more than 40% (actually measured up to 200kg / h). Combined with Siemens PLC industrial Ethernet high-speed communication (response ≤0.1s) and dynamic speed regulation of the stepping conveyor, material flow efficiency is improved by 35%.

[0014] 2. This automatic hydraulic molding device for powdered materials features a dew point detector embedded in the calendering cycle for real-time moisture content feedback after each cycle. Dual detection units before and after baking form a closed-loop control system, ensuring moisture content fluctuations are ≤±0.3% (compared to ±1.5% in traditional processes). The angled cage pre-forming system is precisely pressed with the mold head (tolerance ±0.1mm), combined with a ±0.5mm positioning accuracy cutter and 12-hour air curing on a folding drying rack, completely eliminating material adhesion and deformation. The cage-type vibrating screen with multi-stage adjustable amplitude modules achieves automatic sorting of particles from 0.5-5mm in diameter, with a qualified product rate ≥99.2% (15% higher than manual methods).

[0015] 3. This automatic hydraulic molding device for powdered materials features an independent explosion-proof compartment for the pelletizing unit, coupled with fully automated operation by a robotic arm, eliminating the risk of dust explosions and reducing the accident rate to below 0.1%. The closed-loop linkage between the double-cone polishing machine and the screw extruder reduces dust emission by 90%. The reusable conveyor belt for calendering waste reduces raw material loss by 8%, the oven heat recovery system saves 25% on energy, and the three-component adhesive feeding error is ≤±1%. The IP54-protected electrical control cabinet and modular unit design shorten fault location time by 70%, and the three-color alarm system improves maintenance response speed by 50%.

[0016] 4. This automatic hydraulic molding device for powdered materials features a customized central control system that achieves digital twin monitoring via industrial Ethernet (real-time display of remaining baking time, moisture content curve, etc.), with process data stored for ≥5 years. Reserved interfaces support dynamic adjustment of parameters such as calendering cycles (5-10 times), baking time (48-96 hours), and pellet size (0.3-10mm). The modular, stacked unit layout (e.g., integrating the detection and baking units) reduces floor space by 45%, adapting to various factory spaces and providing a highly flexible mass production solution for the chemical, pharmaceutical, and food industries. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structural composition of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure at the feeding and calendering unit;

[0020] Figure 3 This is a schematic diagram of the structure of the moisture content detection unit;

[0021] Figure 4 This is a schematic diagram of the structure of the circulating baking unit;

[0022] Figure 5 This is a schematic diagram of the structure at the kneading molding unit;

[0023] Figure 6 This is a schematic diagram of the structure at the material pelletizing unit;

[0024] Figure 7 This is a schematic diagram of the structure of the material discharge unit.

[0025] In the diagram: 100, Feeding and calendering unit; 101, Vibrating feeder; 102, Calender; 103, AGV forklift; 104, Conveying and feeding mechanism; 105, Lifting and unloading mechanism; 106, Circulating conveyor belt; 200, Moisture content detection unit; 201, Moisture content detection equipment; 202, Transfer robot; 203, Moving guide rail one; 204, Cleaning robot; 205, Return conveyor belt; 300, Circulating baking unit; 301, Storage robot; 302, Feeding conveyor belt one; 303, Discharge conveyor belt; 304, Drying oven; 400, Kneading and molding unit; 401, Transfer robot one; 402, three Component glue supply system; 403, kneader; 404, angle cage preforming system; 405, feeding hopper and feeding conveyor belt; 500, material pelletizing unit; 501, press; 502, folding drying rack; 503, moving guide rail II; 504, transfer robot II; 505, telescopic conveyor belt; 506, cutting machine; 507, temporary storage box; 600, screening and discharge unit; 601, double cone polishing machine; 602, screw extruder; 603, material distribution bin; 604, storage silo; 605, walking conveyor belt; 606, cage type vibrating screening equipment; 607, lifting and feeding machine; 608, unloading robot; 609, moving guide rail III. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] This utility model provides the following technical solution:

[0029] Combination Figures 1 to 7 An automatic hydraulic molding device for powdered materials includes a feeding and calendering unit 100, a moisture content detection unit 200 on one side of the feeding and calendering unit 100, a kneading and molding unit 400 on one side of the moisture content detection unit 200, a material pelletizing unit 500 on the side of the kneading and molding unit 400 away from the moisture content detection unit 200, a screening and discharge unit 600 on one side of the material pelletizing unit 500, and a circulating baking unit 300 on one side of the moisture content detection unit 200.

[0030] The feeding and calendering unit 100 includes a vibrating feeder 101, a calender 102 is provided on one side of the vibrating feeder 101, a circulating conveyor belt 106 is provided on one side of the calender 102, a feeding mechanism 104 is provided on the top of the circulating conveyor belt 106, a lifting and unloading mechanism 105 is provided on the inner side of the circulating conveyor belt 106, and an AGV feeding forklift 103 is provided on one side of the circulating conveyor belt 106.

[0031] Furthermore, the moisture content detection unit 200 includes a moving guide rail 203, a transfer robot 202 is installed on the top of the moving guide rail 203, a cleaning robot 204 is installed inside the moving guide rail 203, a return conveyor belt 205 is installed on one side of the cleaning robot 204, and a moisture content detection device 201 is installed on one side of the moving guide rail 203.

[0032] Furthermore, the circulating baking unit 300 includes an oven 304, on one side of which a feeding conveyor belt 302 and a discharging conveyor belt 303 are respectively provided, and on one side of the feeding conveyor belt 302, a storage robot 301 is provided.

[0033] Furthermore, the kneading and forming unit 400 includes a kneader 403, a corner cage type preforming system 404 is provided on one side of the kneader 403, a feeding hopper and a feeding conveyor belt 405 are provided on one side of the corner cage type preforming system 404, a three-component glue supply system 402 is provided on one side of the kneader 403, and a transfer robot arm 401 is provided on one side of the kneader 403.

[0034] Furthermore, the material pelletizing unit 500 includes a press 501, a folding drying rack 502 is provided on one side of the press 501, a telescopic conveyor belt 505 is provided on one side of the folding drying rack 502, a cutting machine 506 is provided on one side of the telescopic conveyor belt 505, a temporary storage box 507 is provided on one side of the cutting machine 506, a transfer robot 504 is provided on one side of the telescopic conveyor belt 505, and a moving guide rail 503 is provided on one side of the transfer robot 504.

[0035] Furthermore, the screening and discharge unit 600 includes a double cone polishing machine 601, a screw extruder 602 is provided on one side of the double cone polishing machine 601, a storage hopper 604 is provided on one side of the screw extruder 602, a distribution hopper 603 is provided on one side of the storage hopper 604, a stepping conveyor belt 605 is provided on one side of the double cone polishing machine 601, a cage vibrating screen 606 is provided on one side of the stepping conveyor belt 605, a lifting and feeding machine 607 is provided on one side of the cage vibrating screen 606, a dumping robot 608 is provided on one side of the stepping conveyor belt 605, and a moving guide rail 609 is provided on one side of the dumping robot 608.

[0036] Automatic hydraulic process for powder materials:

[0037] 1. Feeding and calendering

[0038] 1.1 The AGV loading forklift 103 places the hopper containing the required weight of material into the lifting and unloading equipment.

[0039] 1.2 The lifting and unloading equipment raises the hopper to the unloading height and pours the powder into the feeding pump. The feeding pump feeds the material in a fixed quantity, and the stepping conveyor pours the material into the calender 102.

[0040] 1.3 After the material is calendered, it is fed into the circulating conveyor belt 106 for reloading. The circulating conveyor belt 106 is equipped with a dew point detector to detect the moisture content of the material.

[0041] 1.4 After repeated calendering and testing 7-8 times, qualified products are sent to the vibrating material sorting tray 101 for sorting, and unqualified products are placed on the end platform of the conveyor belt next to the material sorting tray for manual collection.

[0042] 2. Moisture content testing

[0043] 2.1 The material on the feeding tray is placed onto the testing equipment by the transfer robot to test its moisture content.

[0044] 2.1 Qualified products are placed on the feeding conveyor belt of the baking unit, and unqualified products are placed on the end platform for manual collection.

[0045] 3. Circulating baking

[0046] 3.1 The feeding conveyor belt is equipped with a smoothing and rolling mechanism to process the material while it is being fed.

[0047] 3.1 The storage robot 301 delivers the materials into the oven 304 and stacks them up sequentially for continuous baking for 72 hours.

[0048] 3.1 After baking, the product is returned to the testing unit for moisture content testing again.

[0049] 3.1 Qualified products are poured into the feeding hopper of the kneading and molding unit 400, and unqualified products are placed on the end platform for manual collection.

[0050] 4. Knead and shape

[0051] 4.1 The feeding hopper and conveyor quantitatively pour the material into the kneader 403, mixing the material with the adhesive liquid.

[0052] 4.1 The mixed material is shaped by the angle cage preforming system 404 according to the shape of the mold head, and is cut off by the cutting blade in front of the temporary storage box 507.

[0053] 4.1 The transfer robot sends the formed material into the material pelletizing unit 500.

[0054] 5. Material pelletizing

[0055] 5.1 Press 501 presses the material into long strips, which are then picked up by telescopic conveyor belt 505 and conveyed to the cutting machine 506.

[0056] 5.1 Lift the folding drying rack 502 and lift the strip-shaped material into the area for drying for 24 hours.

[0057] 5.1 The robotic arm adjusts the position of the strip material and continues to convey it. After cutting it into granules, it is placed in the temporary storage box 507.

[0058] 6. Temporary storage after material discharge

[0059] 6.1 The material is poured into the double cone polishing machine 601 by the robot, and after polishing, it is sent to the storage silo 604 through the screw extruder 602.

[0060] 6.2. According to the usage, pour the material in the storage bin 604 into the distribution bucket 603 through the distribution valve and pipeline.

[0061] 6.3 The transfer robot grabs the temporary storage box 507 and moves it to the bottom of the material distribution bin 603 to receive the material.

[0062] 6.4 Place the temporary storage box 507 containing materials on the stepper conveyor, and the unloading robot grabs the temporary storage box 507 on the conveyor.

[0063] 6.5 The unloading robot pours the material into the cage-type vibrating screen 606, and the cage-type vibrating screen 606 screens the material into different distribution buckets 603 according to the fineness.

[0064] Production line functions:

[0065] I. Feeding and calendering unit 100

[0066] The materials required for the process are loaded into hoppers, which are then placed on a fixed platform using an AGV forklift. The hoppers are lifted to the required height via a lifting mechanism, and the materials are poured into the feeding valve. The feeding valve and conveyor feed the materials quantitatively, and the calender 102 presses the materials into sheets. After calendering, the materials are re-fed via a circulating conveyor belt 106, and the calendering process is repeated 7-8 times. The materials are then sorted by a vibrating sorting plate 101 and ready for the robotic arm to pick up. A dew point detector is installed next to the circulating conveyor belt 106 to check the moisture content of the materials before each re-feeding.

[0067] II. Material Detection Unit

[0068] The material inspection unit is mainly used for detecting the moisture content of calendered and baked materials. After calendering, the materials are sorted and placed on the inspection equipment by a transfer robot. Qualified materials are sent to the baking unit, while unqualified materials are placed on the platform at the end of the conveyor belt. The baked materials are then inspected for moisture content again. Qualified materials are sent to the kneading unit, while unqualified materials are cleaned on the conveyor belt and then sent to the platform at the end. Subsequent processing of unqualified materials is then carried out manually.

[0069] III. Circulating Baking Unit 300

[0070] After being smoothed and rolled twice, the material on the feeding conveyor belt is placed into the drying oven 304 by the storage robot 301 and stacked for 72 hours. The material in the drying oven 304 is divided into three categories according to the baking time and flows in sequence. The material that has reached the required baking time is placed on the discharge conveyor belt 303 by the storage robot 301 and sent back to the detection unit.

[0071] IV. Kneading and Molding Unit 400

[0072] The material is placed in the feeding hopper and poured into the kneader 403 via the feeding conveyor belt. The adhesive solution is injected into the kneader 403 through a three-component adhesive supply system. After thorough mixing, it is sent to the angle cage type preforming system 404. The preforming system is driven by a motor to press the material into shape according to the shape of the molding head, and the material is cut by a cutting blade at the front end of the discharge port. The cut material is transferred to the pelletizing unit by a robotic arm.

[0073] V. Material pelletizing unit 500

[0074] The material pelletizing unit 500 is placed in an explosion-proof compartment. A press 501 compresses the material into long strips, which are then picked up by a telescopic conveyor belt 505 and transported towards the cutting machine 506. A folding drying rack 502 is installed at a fixed position on the conveyor belt. Once the material reaches the designated area, the drying rack is raised, allowing the material to air dry for 12 hours. After drying, a robotic arm adjusts the position and continues conveying the material, which is then cut into pellets by the cutting machine 506.

[0075] VI. Screening and discharge unit 600

[0076] Granules are fed into a double-cone polishing machine 601 by a robotic arm inside an explosion-proof compartment. After polishing, they are sent to a storage silo 604 via a screw extruder 602. The storage silo 604 distributes the granules into a distribution bin 603 according to the daily process requirements. A gate is located below the distribution bin 603. The robotic arm places a temporary storage box 507 below the gate, and the gate is closed by a motor, pouring material into the temporary storage box 507. The temporary storage boxes 507, filled with material, are then placed sequentially on a stepping conveyor. A discharging robotic arm 608 pours the material into the hopper of a lifting feeder 607. The feeder pours the material into a cage-type vibrating screen 606, which uses vibration to separate the material according to its size, pouring it into the distribution bin 603. After the temporary storage boxes 507 are emptied, they are set aside. When there are no temporary storage boxes 507 on the conveyor belt, they are returned sequentially, and the process is repeated with the transfer robotic arm picking up and feeding material.

[0077] VII. Customized central control system

[0078] The customized central control system is designed based on Siemens programmable logic controllers (PLCs). Utilizing a medium-to-large-sized Siemens PLC, its fast signal processing speed significantly reduces system response time, thereby improving production efficiency.

[0079] The customized central control system connects various subsystems, including the loading and unloading devices, laying table, material laying device, sheet material transfer mechanism, and heating furnace, via industrial Ethernet, thereby achieving automated control of the entire production unit. The control system is equipped with a human-machine interface that displays the status of each system, making it easier for operators to perform automatic control.

[0080] The customized master control system reserves the necessary interfaces, allowing users to expand the control system.

[0081] Human-Machine Interface System: The human-machine interface system uses a touchscreen and communicates with the PLC system via industrial Ethernet, seamlessly integrating with Siemens controllers. The display interface is in Chinese and can show equipment operating status and provide operation guidance.

[0082] Electrical control cabinet: The electrical control cabinet adopts a standard control cabinet with an IP54 protection rating, which can effectively prevent dust. PLC, circuit breakers, and relays are centrally located in the control cabinet for easy maintenance and repair.

[0083] Control Panel: The control panel is a sloping vertical design. The touchscreen, buttons, and indicator lights are centrally located on the panel, which is placed next to the equipment for easy operation. The control panel features three-color lights: green for automatic operation, yellow for automatic stop, and red for fault alarm, facilitating manual monitoring of equipment operation.

[0084] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. An automatic hydraulic forming device for powdered materials, comprising a feeding and calendering unit (100), characterized in that: A moisture content detection unit (200) is provided on one side of the feeding and calendering unit (100), a kneading and shaping unit (400) is provided on one side of the moisture content detection unit (200), a material pelletizing unit (500) is provided on the side of the kneading and shaping unit (400) away from the moisture content detection unit (200), a screening and discharge unit (600) is provided on one side of the material pelletizing unit (500), and a circulating baking unit (300) is provided on one side of the moisture content detection unit (200). The feeding and calendering unit (100) includes a vibrating feeder (101), a calender (102) is provided on one side of the vibrating feeder (101), a circulating conveyor belt (106) is provided on one side of the calender (102), a conveying and feeding mechanism (104) is provided on the top of the circulating conveyor belt (106), a lifting and unloading mechanism (105) is provided on the inner side of the circulating conveyor belt (106), and an AGV feeding forklift (103) is provided on one side of the circulating conveyor belt (106).

2. The automatic hydraulic molding device for powdered materials according to claim 1, characterized in that: The moisture content detection unit (200) includes a moving guide rail (203), a transfer robot (202) is provided on the top of the moving guide rail (203), a cleaning robot (204) is provided on the inner side of the moving guide rail (203), a return material conveyor belt (205) is provided on one side of the cleaning robot (204), and a moisture content detection device (201) is provided on one side of the moving guide rail (203).

3. The automatic hydraulic molding device for powdered materials according to claim 1, characterized in that: The circulating baking unit (300) includes an oven (304), on one side of the oven (304) are a feeding conveyor belt (302) and a discharging conveyor belt (303), and on one side of the feeding conveyor belt (302) is a warehouse robot (301).

4. The automatic hydraulic molding device for powdered materials according to claim 1, characterized in that: The kneading and forming unit (400) includes a kneader (403), a corner cage type preforming system (404) is provided on one side of the kneader (403), a feeding hopper and a feeding conveyor belt (405) are provided on one side of the corner cage type preforming system (404), a three-component glue supply system (402) is provided on one side of the kneader (403), and a transfer robot (401) is provided on one side of the kneader (403).

5. The automatic hydraulic molding device for powdered materials according to claim 1, characterized in that: The material pelletizing unit (500) includes a press (501), a folding drying rack (502) is provided on one side of the press (501), a telescopic conveyor belt (505) is provided on one side of the folding drying rack (502), a cutting machine (506) is provided on one side of the telescopic conveyor belt (505), a temporary storage box (507) is provided on one side of the cutting machine (506), a transfer robot (504) is provided on one side of the telescopic conveyor belt (505), and a moving guide rail (503) is provided on one side of the transfer robot (504).

6. The automatic hydraulic molding device for powdered materials according to claim 1, characterized in that: The screening and discharge unit (600) includes a double cone polishing machine (601), a screw extruder (602) is provided on one side of the double cone polishing machine (601), a storage silo (604) is provided on one side of the screw extruder (602), a distribution hopper (603) is provided on one side of the storage silo (604), a stepping conveyor belt (605) is provided on one side of the double cone polishing machine (601), a cage vibrating screen (606) is provided on one side of the stepping conveyor belt (605), a lifting and feeding machine (607) is provided on one side of the cage vibrating screen (606), a dumping robot (608) is provided on one side of the stepping conveyor belt (605), and a moving guide rail (609) is provided on one side of the dumping robot (608).

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