Bottom discharging and distributing machine capable of secondarily distributing materials

Abstract

The utility model relates to a bottom discharging and distributing machine capable of distributing materials twice, which comprises a feeding device, a foaming device, a drying device and a discharging device, materials enter the foaming device through the feeding device to be cured, the cured materials are discharged from the foaming device and then dried through the drying device, and then the materials are discharged through the discharging device. The foaming device comprises a curing tank and a steam input device, the feeding device comprises a material injection pipe communicated with the curing tank, a primary feeding assembly and a secondary feeding assembly, the primary feeding assembly and the secondary feeding assembly are in linkage with the material injection pipe, and the secondary feeding assembly comprises a secondary feeding box and a secondary feeding pipe arranged on one side of the secondary feeding box and communicated with the material injection pipe. The curing flexibility and efficiency of EPS particles with different particle sizes are improved, the EPS particle curing device is particularly suitable for large-particle-size EPS particles needing secondary curing, and the processing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of a material feeder, in particular to a bottom discharging material feeder capable of secondary material feeding. Background Art

[0002] EPS is a rigid honeycomb foam of polystyrene (PS), with good heat insulation and shock absorption, high compressive strength, extremely light weight and moisture resistance. Its applications include building insulation and sound insulation, covering of side walls and interior walls, packaging materials and disposable packaging containers, etc. The existing foam production process includes preparation of raw materials, weighing, pre-foaming, fluidized drying, cooling, drying and storage, etc. The ripening of EPS foam is a process of drying, cooling and stabilizing the cell pressure of just pre-expanded EPS particles for a certain period of time, and the ripening time is related to the environmental temperature and air flow conditions.

[0003] The existing Chinese utility model patent with the publication number of CN220661423U discloses an EPS particle ripening device, which includes a frame, on which a ripening tank body and a motor are provided. On the ripening tank body, a sleeve, a feeding assembly and a discharging assembly are provided. On the sleeve, a hot air pipe and a first stirring shaft are provided. On the hot air pipe, a hot air blower is provided. On the hot air blower, an air inlet pipe is provided. On the first stirring shaft, a connecting rod, a support rod and a spiral blade are provided. On the connecting rod, a second stirring shaft is provided. On the second stirring shaft, a stirring assembly and a spiral blade are provided. The stirring assembly includes an external gear. An internal gear is provided in the ripening tank body. Spray holes are provided on the spiral blade. By providing a hot air blower, a ripening tank body, a first stirring shaft and a second stirring shaft, the EPS particles are uniformly and quickly ripened, solving the problems that the traditional polystyrene foam particle ripening device cannot achieve a good air supply effect and the EPS particles will fly out of the ripening tank body, thereby improving the ripening efficiency.

[0004] The above-mentioned technology has the following defects in the actual use process:

[0005] 1. In the prior art, EPS particles need to be fed before they can expand into EPS particles with a large particle size. When the EPS particles are fed once, the particle size after expansion cannot reach the required particle size (the weight of the EPS particles formed by one-time feeding is 8 g for 500 ml, that is, the density is 16 kg / m³). When manufacturing some EPS particles with ultra-low density and large particle size, one-time feeding cannot meet the standard. Usually, the EPS particles after one-time feeding need to be cooled and then fed again for the second time, so that the EPS particles after the second feeding have the characteristics of lower density and larger particle size, and are used for the manufacture of subsequent products (ultra-light soles). However, in the current technology, since the raw material of EPS particles before one-time feeding has a small particle size, it can be fed into the aging tank in large quantities through a funnel for feeding. When the EPS particles suitable for one-time feeding are fed again, due to the increase in particle size, they need to be loaded in batches through the funnel in the original structure into the aging tank for the second feeding, resulting in low overall efficiency.

[0006] 2. In the prior art, the discharge port of the aging tank is arranged on the side of the mixing barrel, which will reduce the discharge speed, and the material at the bottom of the mixing barrel cannot be discharged through the discharge port, resulting in incomplete discharging and inaccurate aging control.

[0007] 3. In the prior art, after the EPS particles after feeding are discharged from the aging tank, they will also be discharged and stored after fluidized drying and cooling. However, the EPS particles just after aging are prone to adhesion, resulting in uneven patterns during the subsequent sole molding. It is necessary to screen the adhered EPS particles before storage. Summary of the Invention

[0008] The technical problem to be solved by the present utility model is to provide a bottom discharge feeder capable of secondary feeding in view of the above deficiencies of the prior art.

[0009] To achieve the above object, the utility model provides the following technical solution: A bottom discharging feeder capable of secondary feeding, comprising a feeding device, a foaming device, a drying device and a discharging device. Materials enter the foaming device through the feeding device for ripening. After the ripened materials are unloaded from the foaming device, they are dried by the drying device, and then discharged by the discharging device. The foaming device includes a ripening tank and a steam input device. It is characterized in that: the ripening tank includes a feeding tank body, a stirrer rotatably arranged in the feeding tank body, a breathable partition plate arranged in the feeding tank body, and at least one discharging port opened on the breathable partition plate. There is a steam inlet cavity between the breathable partition plate and the bottom of the feeding tank body. The steam input device is used to introduce steam into the steam inlet cavity. The steam inlet cavity is provided with falling holes corresponding to the discharging ports. A discharging cylinder is installed at the bottom of the feeding tank body. The output end of the discharging cylinder is sequentially provided with a discharging baffle and a steam block from top to bottom. The discharging baffle is installed in cooperation with the discharging port. The steam block is installed in cooperation with the falling hole and approaches or moves away from the feeding tank body along the axial direction of the discharging cylinder.

[0010] With the above technical solution, a breathable partition plate is arranged in the feeding tank, and a discharging port is arranged on the breathable partition plate. The opening and closing of the discharging baffle are controlled by the discharging cylinder. The steam inlet cavity is provided with falling holes and cooperates with the steam block of the discharging cylinder to block the tank body. There is a steam inlet cavity between the breathable partition plate and the bottom, so that the steam input device introduces steam into the tank through the steam inlet cavity. The density of the steam is lower than that of the air, so that the steam will be subjected to an upward buoyancy force, and it will continue to rise after being heated at the bottom, heating from bottom to top, which can evenly transfer heat to every corner of the tank body, avoiding local overheating or insufficient ripening, and greatly improving the utilization rate of steam. After the feeding is completed, the control system instructs the discharging cylinder to act, driving the discharging baffle to open, and the EPS particles are discharged from the discharging port, realizing fast, clean and thorough discharging, reducing material residue and improving production efficiency.

[0011] Further, the feeding device includes a feeding pipe communicated with the ripening tank, a primary feeding component and a secondary feeding component linked with the feeding pipe. The primary feeding component includes a feeding hopper, a weighing hopper arranged below the feeding hopper, and a primary feeding hopper arranged between the weighing hopper and the feeding pipe. One end of the primary feeding hopper is oppositely arranged below the weighing hopper, and the other end is communicated with the feeding pipe. The bottoms of the feeding hopper and the weighing hopper are both provided with hopper on-off components for controlling the passage of materials. The secondary feeding component includes a secondary feeding box and a secondary feeding pipe arranged on one side of the secondary feeding box and communicated with the feeding pipe.

[0012] With the above technical solution, by adding a primary feeding component and a secondary feeding component, EPS particles of different sizes are allowed to be cured separately. The primary feeding component is responsible for the primary curing of small-sized uncured EPS particles, while the secondary feeding component allows the EPS particles that have been cured and enlarged to be cured again. The EPS particles are first weighed through the primary feeding hopper and enter the curing tank for primary curing. The cured particles are discharged through the discharge port, and the particles that need secondary curing are collected by the secondary feeding box for the EPS particles after primary curing. At this time, the EPS particles have been cured and weighed once. The density of the EPS particles after primary curing can be known without weighing again. The approximate weight and area at this time are then fed into the curing tank again through the secondary feeding pipe for further curing to obtain lighter EPS particles, improving the flexibility and efficiency of curing EPS particles of different particle sizes, especially suitable for large-sized EPS particles that require secondary curing, and improving the processing efficiency.

[0013] Further, the hopper on-off component includes hopper on-off seats respectively arranged at the bottoms of the feeding hopper and the weighing hopper, a hopper on-off cylinder arranged on the hopper on-off seat, and a hopper on-off plate arranged at the output end of the hopper on-off cylinder. The hopper on-off cylinder drives the hopper on-off plate to expand and contract, thereby controlling the conduction or closing of the bottoms of the feeding hopper and the weighing hopper.

[0014] With the above technical solution, by arranging an on-off component between the feeding hopper and the weighing hopper, precise control of the material flow is achieved. The hopper on-off cylinder drives the hopper on-off plate to expand and contract according to the instructions of the control system, thereby controlling the inflow and blocking of the material, precisely controlling the feeding amount of the material, and preventing uneven curing or equipment damage caused by excessive feeding.

[0015] Further, observation windows for observing the interior are provided on the surfaces of the material discharging tank body and the secondary feeding box.

[0016] With the above technical solution, transparent observation windows are arranged on the surfaces of the material discharging tank and the secondary feeding box, allowing the operator to directly observe the internal situation. The operator monitors the curing state of the internal material in real time through the observation window and performs manual intervention when necessary. At the same time, according to the scales on the surfaces of the material discharging tank body and the secondary feeding box, the volume of the EPS particles at this stage is known, enhancing the transparency and controllability of the production process and facilitating the timely discovery and solution of problems.

[0017] Further, the drying device includes a drying bed arranged at the bottom of the material discharging tank body and a drying fan. The drying fan is installed at one end of the drying bed away from the discharging device. The cured material is conveyed along the drying bed towards the discharging device end by the drying fan.

[0018] With the above technical solution, the drying device includes a drying bed and a drying fan. The ripened EPS particles are conveyed along the drying bed by wind force. After discharging, the ripened EPS particles enter the drying bed, and the wind force generated by the drying fan pushes the particles forward to achieve sufficient drying, accelerating the drying process of the EPS particles and improving the drying efficiency and product quality.

[0019] Furthermore, a gate that can be opened is provided between the discharging device and the drying bed. A drying outer cover is provided over the drying bed. The drying outer cover and the drying bed cooperate to form a drying chamber, and a heat dissipation pipe that conducts the drying chamber to the external space is provided on the drying outer cover.

[0020] With the above technical solution, the drying device forms a closed drying chamber through the drying outer cover, and adjusts the temperature and pressure through the heat dissipation pipe. The drying outer cover closes the drying bed to form a drying environment. Excess heat and moisture are discharged through the heat dissipation pipe to maintain a stable environment in the drying chamber, ensuring the drying quality and preventing interference from the external environment during the drying process.

[0021] Furthermore, the discharging device includes a discharging chamber connected to the drying device, a discharging port provided at the bottom of the discharging chamber, a screening mesh provided inside the discharging chamber, a screening motor provided at the top of the discharging chamber, and a screening rotating arm provided at the output end of the screening motor. The screening rotating arm rotates along the surface of the screening mesh.

[0022] With the above technical solution, the mesh size of the screening mesh is set to be slightly larger than the particle size of the EPS particles after secondary feeding. The discharging device includes a screening mesh and a screening motor to achieve uniform discharging and screening of the material. The dried EPS particles pass through the screening mesh. The screening motor drives the screening rotating arm to rotate, evenly screening the particles and discharging them through the mesh holes of the screening mesh to the discharging port, ensuring the uniformity of discharging and the consistency of the material, improving the product quality, and preventing sticky materials from being taken for subsequent sole molding.

[0023] Furthermore, a crusher is provided on one side of the bottom of the discharging chamber. A crushing cover is provided on the crusher. A crushing port that communicates with the crushing cover is provided on the screening mesh, and several crushing filter ports that communicate with the discharging chamber are provided on the side wall of the crushing cover.

[0024] With the above technical solution, for large or unqualified EPS particles, they are crushed by the crusher. The screening mesh screens out large materials that cannot move down and enters the crusher. The crusher crushes the materials and discharges them through the crushing filter ports, improving the utilization rate of the materials, reducing the generation of waste, and avoiding congestion.

[0025] Furthermore, a roller and a roller motor for driving the roller to rotate are provided at the bottom of the discharging chamber. The discharging port is provided below the roller.

[0026] With the above technical solution, a roller motor is arranged in the discharge chamber to drive the roller to rotate, scatter the falling materials again, further dissipate heat and prevent adhesion again, thereby improving the heat dissipation efficiency.

[0027] Furthermore, an exhaust fan is provided on one side of the discharge chamber. The exhaust fan is connected with an air duct. The air duct is arranged below the roller, and the air duct and the discharge port are correspondingly arranged at both ends of the roller.

[0028] With the above technical solution, the exhaust fan generates wind through the air duct to assist the materials to be discharged from below the roller. When the exhaust fan starts, the wind blows the materials below the roller through the air duct, helping the materials to be discharged smoothly, preventing the materials from clogging at the discharge port, ensuring smooth discharge, and improving the production efficiency.

[0029] The present utility model will be further described below with reference to the accompanying drawings. Description of the Drawings

[0030] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the present utility model.

[0031] Figure 2 It is a three-dimensional schematic diagram of the embodiment of the present utility model after removing the outer shell.

[0032] Figure 3 It is a three-dimensional schematic of the embodiment of the present utility model after removing the outer shell Figure 2 .

[0033] Figure 4 It is a cross-sectional schematic diagram of an embodiment of the present utility model.

[0034] Figure 5 It is a structural schematic diagram of the discharge device of the embodiment of the present utility model.

[0035] Figure 6 It is a three-dimensional schematic diagram of the discharge device of the embodiment of the present utility model.

[0036] Figure 7 It is a three-dimensional schematic diagram of the foaming device of the embodiment of the present utility model.

[0037] Figure 8 It is an internal structural schematic diagram of the foaming device of the embodiment of the present utility model. Embodiment

[0038] As Figures 1-8As shown in the figure, a bottom discharging feeder capable of secondary feeding includes a feeding device 1, a foaming device 2, a drying device 3 and a discharging device 4. Materials enter the foaming device 2 through the feeding device 1 for ripening. After ripening, the materials are discharged from the foaming device 2 and dried by the drying device 3, and then discharged by the discharging device 4. The foaming device 2 includes a ripening tank and a steam input device 5. The feeding device 1 includes a feeding pipe 11 connected to the ripening tank, a primary feeding assembly and a secondary feeding assembly linked to the feeding pipe 11. The primary feeding assembly includes a storage bin 12, a feeding hopper 13, a feeding machine 121 that sucks the materials in the storage bin 12 into the feeding hopper 13, a weighing hopper 14 arranged below the feeding hopper 13, and a primary feeding hopper 15 arranged between the weighing hopper 14 and the feeding pipe 11. One end of the primary feeding hopper 15 is directly opposite to the bottom of the weighing hopper 14, and the other end is communicated with the feeding pipe 11. Hopper on-off assemblies 10 for controlling the passage of materials are provided at the bottoms of both the feeding hopper 13 and the weighing hopper 14. The secondary feeding assembly includes a secondary feeding box 16 and a secondary feeding pipe 161 arranged on one side of the secondary feeding box 16 and communicated with the feeding pipe 11. The hopper on-off assembly 10 includes hopper on-off seats 101 respectively arranged at the bottoms of the feeding hopper 13 and the weighing hopper 14, hopper on-off cylinders 102 arranged on the hopper on-off seats 101, and hopper on-off plates 103 arranged at the output ends of the hopper on-off cylinders 102. The hopper on-off cylinders 102 drive the hopper on-off plates 103 to expand and contract, thereby controlling the conduction or closing of the bottoms of the feeding hopper 13 and the weighing hopper 14. The setting of the secondary feeding assembly facilitates the re-concentrated feeding of EPS particles that have been fed once, improving the feeding efficiency.

[0039] As Figures 3-8 shown, the ripening tank includes a discharging tank body 21, a stirrer 22 rotating in the discharging tank body 21, a breathable partition 20 arranged in the discharging tank body 21, and at least one discharging port 201 opened on the breathable partition 20. There is a steam inlet chamber 25 between the breathable partition 20 and the bottom of the discharging tank body 21. The steam input device 5 is used to introduce steam into the steam inlet chamber 25. Discharge holes 251 are opened in the steam inlet chamber 25 corresponding to the discharging ports 201. A discharging cylinder 24 is installed at the bottom of the discharging tank body 21. The output end of the discharging cylinder 24 is successively provided with a discharging baffle 241 and a steam block 242 from top to bottom. The discharging baffle 24 is installed in cooperation with the discharging port 201, and the steam block 242 is installed in cooperation with the discharge hole 251. The discharging baffle 24, the discharging port 201, the steam block 242 and the discharge hole 251 are all on the same axis and approach or move away from the discharging tank body 21 along with the axial lifting of the discharging cylinder 2. For example Figure 8The material discharging tank body 21 shown in the figure. The discharging baffle 24, discharging port 201, steam blockage 242, blanking hole 251 and discharging cylinder 24 are set to two. At this time, for convenient observation, one side is in a blocked state and the other side is in a discharging state. Under normal conditions, during aging, both discharging cylinders 24 block the material discharging tank body 21. When discharging, both discharging cylinders 24 open the material tank body 21. Observation windows 160 for observing the interior are provided on the surfaces of the material discharging tank body 21 and the secondary feeding box 16, which is convenient for directly observing the current volumes of the material discharging tank body 21 and the secondary feeding box 16.

[0040] As Figures 2-4 shown, the drying device 3 includes a drying bed 31 and a drying fan 32 arranged at the bottom of the material discharging tank body 21. The drying fan 32 is installed at one end of the drying bed 31 away from the discharging device 4. The aged material is conveyed along the drying bed 31 towards the discharging device 4 by the drying fan 32. A gate 33 that can be opened is provided between the discharging device 4 and the drying bed 31. The end channel of the drying window 31 is closed or opened through the gate 33. When the gate 33 is closed, the material continuously tumbles inside the drying bed 31 and abuts against the gate 33 for drying, prolonging the drying time and improving the drying effect. A drying outer cover 34 is provided on the drying bed 31. The drying outer cover 34 and the drying bed 31 cooperate to form a drying chamber 35, and a heat dissipation pipe 341 for communicating the drying chamber 35 with the external space is provided on the drying outer cover 34.

[0041] As Figure 5 、 Figure 6 shown, the discharging device 4 includes a discharging chamber 41 connected to the drying device 3 and a discharging port 411 arranged at the bottom of the discharging chamber 41. A sieve mesh 412 is provided inside the discharging chamber 41. A sieving motor 42 is provided at the top of the discharging chamber 41. A sieving rotating arm 421 is provided at the output end of the sieving motor 42. The sieving rotating arm 421 rotates along the surface of the sieve mesh 412. A pulverizer 43 is provided on one side of the bottom of the discharging chamber 41. A pulverizing cover 431 is provided on the pulverizer 43. A pulverizing port 413 communicating with the pulverizing cover 431 is provided on the sieve mesh 42. A plurality of pulverizing filter ports 432 communicating with the discharging chamber 41 are provided on the side wall of the pulverizing cover 431. A roller 441 and a roller motor 44 for driving the roller 441 to rotate are provided at the bottom of the discharging chamber 41. The discharging port 411 is arranged below the roller 441. A discharging fan 45 is provided on one side of the discharging chamber 41. The discharging fan 45 is connected with an air duct 451. The air duct 451 is arranged below the roller 441. The air duct 451 and the discharging port 411 are correspondingly arranged at both ends of the roller 441.

[0042] The bottom discharging and material feeding machine of the present utility model has the following steps when feeding EPS particles:

[0043] 1. Raw material preparation: Prepare 3 kg - 30 kg of EPS particle raw materials.

[0044] 2. Raw material metering: The raw materials are put into the silo and sucked into the feeding hopper by a suction machine, and then sent into the weighing hopper through the hopper on-off component for weighing to ensure that it is in the range of 3 kg - 30 kg.

[0045] 3. Raw materials enter the ripening tank: Open the hopper on-off component and send the weighed raw materials into the ripening tank. At this time, the volume of the raw materials in the tank is 1500 ml - 15000 ml.

[0046] 4. Steam input and ripening: Input steam into the ripening tank and start the stirrer to make the EPS particles expand uniformly under the action of steam.

[0047] 5. Ripening process control: Monitor the pressure and temperature in the tank to ensure that the EPS particles are fully ripened and the volume expands to 0.5 m³ - 2 m³.

[0048] 6. Discharge preparation: After ripening, prepare for discharging. Close the steam input, start the discharge cylinder, and open the discharge baffle and steam blockage.

[0049] 7. First discharging: Discharge the ripened EPS particles from the bottom discharge port and the blanking port to complete the first discharging.

[0050] 8. Drying and cooling: Convey the discharged EPS particles to the drying bed and cooperate with the blower for fluidized drying and cooling.

[0051] 9. Sieving and crushing: The dried EPS particles are sieved through the sieve mesh of the discharging device, and the large pieces of materials are crushed by the crusher.

[0052] 10. Post-treatment after the first discharging: The EPS particles after sieving and crushing are discharged with the assistance of the roller and the discharging fan, and quality inspection and classification are carried out, and preparations are made for the second discharging or packaging and storage.

[0053] At this time, the EPS particles of the first discharging can be used normally. When some soles with high requirements for EPS particles need lighter EPS particles to manufacture ultra-light soles, the second discharging is required, and the process steps are as follows:

[0054] 1. Collection of the first foamed materials: Collect the EPS particles after the first discharging and send them into the secondary feeding box (for continuous two discharges, cooling can also be carried out in the secondary feeding box).

[0055] 2. Secondary feeding metering: Take out 0.5 m³ - 2 m³ of EPS particles from the secondary feeding box and prepare for the second discharging.

[0056] 3. Secondary feeding: Open the hopper on-off component of the secondary feeding component and convey the EPS particles to the ripening tank through the secondary feeding pipe.

[0057] 4. Secondary steam input and aging: Input steam into the aging tank, start the agitator, and conduct secondary aging.

[0058] 5. Control of the secondary aging process: Monitor the pressure and temperature inside the tank during the secondary aging process until the EPS particle volume expands to 0.65 cubic meters - 2.65 cubic meters.

[0059] 6. Preparation for secondary discharging: Close the steam input, start the discharging cylinder, and prepare to discharge the secondary-aged EPS particles.

[0060] 7. Secondary material discharging: Open the discharging baffle and the steam blockage, and discharge the secondary-aged EPS particles from the bottom discharging port and the material dropping port.

[0061] 8. Secondary drying and cooling: Convey the secondarily discharged EPS particles to the drying bed and cooperate with the blower for further fluidized drying and cooling.

[0062] 9. Sieving and crushing: Sieve the dried EPS particles through the sieve mesh of the discharging device, and crush the large pieces of materials through the crusher.

[0063] 10. Final discharging and packaging: The EPS particles that have been sieved and crushed are discharged with the assistance of the roller and the discharging fan to complete the secondary material discharging, and then they are packaged or stored.

Claims

1. A bottom discharging feeding machine capable of discharging materials twice, comprising a feeding device, a foaming device, a drying device and a discharging device, wherein the materials enter the foaming device through the feeding device for maturation, the maturated materials are discharged from the foaming device and then dried by the drying device, and then discharged by the discharging device, the foaming device comprising a maturation tank and a steam input device, characterized in that: The ripening tank includes a material dispensing tank body, an agitator arranged to rotate in the material dispensing tank body, a breathable partition arranged in the material dispensing tank body, and at least one discharge port opened on the breathable partition. A steam inlet cavity is present between the breathable partition and the bottom of the material dispensing tank body. The steam input device is used to pass steam into the steam inlet cavity. Drop holes are opened at the steam inlet cavity corresponding to the discharge port. A discharge cylinder is installed at the bottom of the material dispensing tank body. A discharge baffle and a steam plug are sequentially arranged at the output end of the discharge cylinder from top to bottom. The discharge baffle is installed in conjunction with the discharge port, and the steam plug is installed in conjunction with the drop hole, and approaches or moves away from the material dispensing tank body as the discharge cylinder rises and falls axially.

2. A bottom discharging feeding machine capable of secondary feeding according to claim 1, characterized in that: The feeding device includes an injection pipe connected to the maturation tank, a primary feeding assembly and a secondary feeding assembly linked to the injection pipe, the primary feeding assembly includes a feeding hopper, a weighing hopper arranged below the feeding hopper, and a primary feeding hopper arranged between the weighing hopper and the injection pipe, one end of the primary feeding hopper is arranged directly below the weighing hopper, and the other end is connected to the injection pipe, the bottom of the feeding hopper and the weighing hopper are both provided with a hopper on-off assembly for controlling the passage of materials, and the secondary feeding assembly includes a secondary feeding box and a secondary feeding pipe arranged on one side of the secondary feeding box and connected to the injection pipe.

3. A bottom discharging machine capable of secondary discharging of materials according to claim 2, characterized in that: The hopper on-off assembly includes a hopper on-off seat respectively arranged at the bottom of the feed hopper and the weighing hopper, a hopper on-off cylinder arranged on the hopper on-off seat, and a hopper on-off plate arranged at the output end of the hopper on-off cylinder. The hopper on-off cylinder drives the hopper on-off plate to extend and retract, thereby controlling the conduction or closure of the bottom of the feed hopper and the weighing hopper.

4. A bottom discharging machine capable of secondary discharging of materials according to claim 3, characterized in that: The surfaces of the material dispensing tank body and the secondary material feeding box are both provided with observation windows through which the interior can be observed.

5. A bottom discharging machine capable of secondary discharging of materials according to claim 1, characterized in that: The drying device comprises a drying bed and a drying fan arranged at the bottom of the material discharging tank body. The drying fan is installed at one end of the drying bed away from the discharging device. The matured material is transported along the drying bed to one end of the discharging device through the drying fan.

6. A bottom discharging material dispensing machine capable of dispensing materials twice according to claim 5, characterized in that: An openable gate is provided between the discharging device and the drying bed, a drying outer cover is provided on the drying bed, the drying outer cover cooperates with the drying bed to form a drying chamber, and a heat dissipation pipe for connecting the drying chamber with the external space is provided on the drying outer cover.

7. A bottom discharging machine capable of secondary discharging of materials according to any one of claims 1 to 6, characterized in that: The discharging device comprises a discharging chamber connected to the drying device and a discharging port arranged in the discharging chamber. A screening mesh is arranged in the discharging chamber, a screening motor is arranged on the top of the discharging chamber, a screening rotary arm is arranged at the output end of the screening motor, and the screening rotary arm rotates along the surface of the screening mesh.

8. A bottom discharging machine capable of secondary discharging of materials according to claim 7, characterized in that: A pulverizer is provided at one side of the bottom of the discharge chamber, a pulverizing cover is provided on the pulverizer, a pulverizing port communicated with the pulverizing cover is provided on the screening net, and a plurality of pulverizing filter ports communicated with the discharge chamber are provided on the side wall of the pulverizing cover.

9. A bottom discharging machine capable of secondary discharging of materials according to claim 8, characterized in that: A roller and a roller motor for driving the roller to rotate are provided at the bottom of the discharge chamber, and the discharge port is arranged below the roller.

10. A bottom discharging material dispensing machine capable of dispensing materials twice according to claim 9, characterized in that: A discharging fan is provided on one side of the discharging chamber, and the discharging fan is connected with an air duct, and the air duct is arranged below the drum, and the air duct and the discharging port are arranged at two ends of the drum correspondingly.

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