Distributing and feeding production device

Abstract

The utility model relates to the technical field of reclaimed rubber production, in particular to a material distributing and feeding production device, aims to solve the technical problem of overcoming the defects of feeding production in the prior art, and is mainly realized through the following technical scheme. Comprising a material distributing device, a desulfurizing device, a feeding device and a refining device, the material distributing device comprises a plurality of material distributing bins and a plurality of material distributing pipes, the desulfurizing device comprises a desulfurizing tank and a material mixing device, the feeding device comprises a weighing hopper, a feeding pipe and a feeding bin, the feeding bin further comprises a stirring device and a pre-kneading device, and the refining device comprises a plurality of refining machines which are continuously arranged. The material distributing device and the feeding device are arranged to mix and convey materials with different proportions, the feeding device uses a weighing hopper to accurately proportion, the quality of subsequent finished products is improved, an underground conveying pipeline is adopted to effectively reduce the occupied area, and the overall working procedure is prevented from being lengthened; the conveying process is continuous, batching and discharging are fully automatically completed, and the labor cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of reclaimed rubber production, in particular to a material dividing and feeding production device. Background Art

[0002] Recycled rubber is produced through multiple production processes of waste rubber. The connection between the production processes of recycled rubber requires the use of a feeding device for transportation. The crushed waste rubber particles are divided into powder, granular or mixed materials. Due to the uniqueness of their state, they need to be treated specially during transportation.

[0003] In the prior art, materials need to be repeatedly transferred between multiple working processes, and most of the working processes require manual loading and unloading, which results in high labor intensity and low production and feeding efficiency. There are many material debris around the working process and the working environment is poor. In addition, uneven material mixing causes uncertainty in subsequent proportions and defective quality of the finished product. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defects of the feeding production in the prior art, thereby providing a material-dividing feeding production device.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A material distribution and feeding production device comprises a material distribution device, a desulfurization device, a feeding device and a refining device connected in sequence, the material distribution device comprises a plurality of material distribution bins and a plurality of material distribution pipes, one end of the material distribution pipe is connected to the material distribution bin, and the other end is connected to the desulfurization device, a desulfurization outlet is arranged below the desulfurization device, one end of the feeding device is arranged below the desulfurization outlet, and the other end is connected to the refining device, the feeding device comprises a weighing bucket, a feeding pipe and a feeding bin, both ends of the feeding pipe are respectively connected to the weighing bucket and the feeding bin, the feeding bin is arranged next to the refining device, and the refining device is a plurality of continuously arranged refiners.

[0007] By adopting the above technical scheme, the material dividing device transfers the rubber particles previously stored in the large silo to the material dividing silo, and performs the desulfurization operation after the material dividing and proportioning. The materials in multiple material dividing silos are first mixed and desulfurized in the desulfurization tank at one time, and then the weighing hopper conveys the quantitative desulfurized materials for refining operation. Before refining, the materials are mixed again to ensure that the material ratio is determined and the mixing is uniform, which is convenient for subsequent refining and use. In the process of transportation after desulfurization, the feeding pipe part is below the ground surface, which can reduce the floor space of the overall device and does not affect the passage of people above. The overlapping arrangement of the material dividing device and the desulfurization device in height can improve the space utilization rate.

[0008] Furthermore, the distribution bins are all arranged above the bracket, each of the distribution bins is connected to a dust removal device, the distribution pipes are arranged corresponding to the distribution bins, and each of the distribution pipes is provided with a control valve.

[0009] By adopting the above technical solution, the control valve is switched to provide different material ratios for different working units. The control valve has a simple structure, is easy to use and can ensure accurate material ratios. In addition, the sub-bin is connected to the dust removal device, and the dust diffusion is reduced by using the dust removal device, which has the characteristics of safety and environmental protection.

[0010] Furthermore, the desulfurization device includes a desulfurization tank and a mixing device. The desulfurization tank is arranged in a bracket and below a distribution bin. The mixing device is arranged on the desulfurization tank. The mixing device includes a mixing shaft, mixing blades and a mixing drive. The mixing shaft is positioned and rotatably installed in the desulfurization tank. The mixing blades are spirally arranged on the mixing shaft. The mixing drive controls the rotation of the mixing shaft.

[0011] By adopting the above technical solution, adding a mixing device can effectively prevent material accumulation and blockage during the process of material incoming and outgoing materials and facilitate the uniform mixing of various materials, which is conducive to the smooth transportation of materials and ensures the stability of the overall transportation situation.

[0012] Furthermore, the desulfurization outlet is arranged on one side of the bottom of the desulfurization tank, and a sealing cover is also provided at the desulfurization outlet. The sealing cover is hinged to the desulfurization tank and is connected to a cover opening drive. The cover opening drive is a telescopic motor and is fixed in the bracket, and the output end of the cover opening drive is hinged to the bottom center of the sealing cover.

[0013] By adopting the above technical solution, during the desulfurization work, the sealing cover and the desulfurization tank are closed to ensure the stability of the working environment air pressure. After the desulfurization work is completed, the cover is opened to drive the material to fall out, avoiding the danger of manual operation. The material falling process is automated and highly safe.

[0014] Furthermore, the weighing hopper is arranged below the desulfurization outlet, the height of the weighing hopper close to the cover opening drive side is lower than the height of the weighing hopper far from the cover opening drive side, and the bottom of the weighing hopper is connected to the feeding pipe.

[0015] By adopting the above technical solution, the weighing bucket directly receives the falling materials and weighs them before quantitatively transporting them to the refining device. The top of the weighing bucket is tilted to avoid structural interference with the cover opening drive when opening the cover, thereby reducing the collision between the sealing cover and the weighing bucket.

[0016] Furthermore, the feeding pipe includes a receiving pipe, an underground pipe and a lifting pipe which are connected in sequence. The receiving pipe is arranged below the weighing bucket and a feeding moving part is arranged at the end of the receiving pipe away from the underground pipe. The underground pipe is arranged vertically to the receiving pipe. One end of the lifting pipe is connected to the underground pipe, and the other end is connected to the feeding bin. The height of the lifting pipe close to the feeding bin is greater than the height of the lifting pipe away from the feeding bin.

[0017] By adopting the above technical solution, the multi-section feeding pipe can increase the material transportation distance, thereby avoiding the scorching and sticking of materials due to excessive temperature, avoiding affecting the operation of the equipment, and ensuring work safety and output quality; the use of underground pipe transportation can increase the material transportation distance while reducing the occupation of the surface area, effectively utilizing the spatial structure.

[0018] Furthermore, the feeding bin includes a feeding tank and a feeding rack, the feeding tank is arranged on the feeding rack, an inlet is provided at the top of the feeding tank and an outlet is provided at the bottom, overflow ports are symmetrically provided on both sides of the inlet, the height of the overflow port is greater than the height of the inlet, the bottom of the overflow port is connected to the feeding tank, a material level switch is provided on the overflow port, and the outlet is connected to the refining device.

[0019] By adopting the above technical scheme, the material is sent into the feeding tank after desulfurization. The overflow ports on both sides of the feeding port can observe the material transportation on the one hand, and on the other hand, the material level switch is set to avoid material blockage caused by excessive material feeding speed. The overflow port is also convenient for the subsequent cleaning and maintenance of the feeding tank.

[0020] Furthermore, the feeding bin also includes a stirring device and a pre-kneading device. The stirring device is arranged along the length direction of the feeding tank. The stirring device includes a stirring shaft, stirring blades and a stirring drive. Both ends of the stirring shaft are positioned and rotatably installed in the feeding tank. The stirring blades are spirally sleeved on the stirring shaft. The stirring drive is arranged outside the stirring tank and drives the stirring shaft to rotate; the pre-kneading device is arranged along the width direction of the feeding tank and is arranged below the stirring device. The pre-kneading device includes two relatively arranged pre-kneading rollers.

[0021] By adopting the above technical scheme, the stirring device stirs and mixes the desulfurized material again to ensure the overall uniformity of the material, and the material passes through a pre-kneading device before being discharged from the discharge port. The material is simply kneaded once under the interaction of the pre-kneading rollers to ensure the degree of plasticity of the kneading, so that the subsequent reclaimed rubber refining is more uniform. The closed state during pre-kneading can reduce the contact of dust and the like with the material, which is helpful to improve the product quality later.

[0022] In summary, the technical solution of the utility model has the following advantages:

[0023] 1. The material distribution and feeding production device provided by the utility model has a reasonable spatial layout, and the feeding pipe part is located below the ground surface, which can reduce the floor space of the overall device without affecting the passage of people above. The material distribution device and the desulfurization device are stacked in height to improve space utilization.

[0024] 2. The utility model provides a material-dividing and feeding production device, in which the mixing device first mixes the materials uniformly, and the stirring device stirs and mixes the desulfurized materials again to ensure the overall uniformity of the materials. Multiple mixing operations ensure the overall uniformity of the materials and improve the quality of subsequent finished products.

[0025] 3. The material-feeding production device provided by the utility model passes through a pre-kneading device before the material is discharged from the discharge port. The material is simply kneaded once under the interaction of the pre-kneading rollers to ensure the plasticity of the kneading, so that the subsequent reclaimed rubber refining is more uniform. The closed state during pre-kneading can reduce the contact of dust and the like with the material, which is helpful to improve the product quality later. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a schematic diagram of the overall structure of a material-dividing and feeding production device provided in one embodiment of the utility model;

[0028] Figure 2 A cross-sectional view of a desulfurization device provided in one embodiment of the utility model;

[0029] Figure 3 A schematic diagram of a partial structure of a desulfurization outlet provided in one embodiment of the utility model;

[0030] Figure 4 A schematic diagram of the partial structure of a feeding device provided in one embodiment of the utility model;

[0031] Figure 5 The present invention is a schematic cross-sectional structural diagram of a feeding tank provided in one embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1. Material distribution device; 11. Material distribution bin; 111. Dust removal device; 12. Material distribution pipe; 121. Control valve; 13. Bracket; 2. Desulfurization device; 21. Desulfurization tank; 211. Desulfurization outlet; 212. Sealing cover; 213. Opening cover drive; 22. Mixing device; 221. Mixing shaft; 222. Mixing blade; 223. Mixing drive; 3. Feeding device; 31. Weighing bucket; 32. Feeding pipe; 321. Receiver; 3211 , feeding moving parts; 322, underground pipe; 323, lifting pipe; 33, feeding bin; 331, feeding tank; 3311, feeding port; 3312, discharging port; 3313, overflow port; 33131, material level switch; 332, feeding rack; 333, stirring device; 3331, stirring shaft; 3332, stirring blade; 3333, stirring drive; 334, pre-kneading device; 3341, pre-kneading roller; 4, refining device; 41, refining machine. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] A material feeding production device, such as Figure 1 As shown, it includes a dividing device 1, a desulfurization device 2, a feeding device 3 and a refining device 4 connected in sequence, the dividing device 1 includes a plurality of dividing bins 11 and a plurality of dividing pipes 12, the dividing pipes 12 are arranged corresponding to the dividing bins 11, one end of the dividing pipes 12 is connected to the dividing bin 11, and the other end is connected to the desulfurization device 2, a desulfurization outlet 211 is arranged below the desulfurization device 2, one end of the feeding device 3 is arranged below the desulfurization outlet 211, and the other end is connected to the refining device 4, the feeding device 3 includes a weighing bucket 31, a feeding pipe 32 and a feeding bin 33, both ends of the feeding pipe 32 are respectively connected to the weighing bucket 31 and the feeding bin 33, the feeding bin 33 is arranged next to the refining device 4, and the refining device 4 is a plurality of continuously arranged refiners 41. The material distribution device 1 transfers the rubber particles previously stored in the large silo to the distribution silo 11, and performs a desulfurization operation after the material distribution ratio. The materials in multiple distribution silos 11 are first mixed and desulfurized in the desulfurization tank 21, and then the weighing bucket 31 conveys a fixed amount of desulfurized materials for refining operation. Before refining, the materials are mixed again to ensure that the material ratio is determined and the mixing is uniform, which is convenient for subsequent refining. In the process of transportation after desulfurization, part of the feeding pipe 32 is below the ground surface, which can reduce the floor space of the entire device without affecting the passage of personnel above. The material distribution device 1 and the desulfurization device 2 are stacked in height to improve space utilization.

[0036] like Figure 1As shown, the material distribution bins 11 are all arranged above the bracket 13, each material distribution bin 11 is connected to a dust removal device 111, and each material distribution pipe 12 is provided with a control valve 121. By switching the control valve 121, different material ratios are provided to different working units. The control valve 121 has a simple structure, is easy to use, and can ensure accurate material ratios; in addition, the material distribution bins 11 are connected to the dust removal device 111, and the dust diffusion is reduced by using the dust removal device 111, which has the characteristics of safety and environmental protection.

[0037] like Figure 1 , Figure 2 and Figure 3 As shown, the desulfurization device 2 includes a desulfurization tank 21 and a mixing device 22. The desulfurization tank 21 is arranged in the bracket 13 and is located below one side of the sub-bin 11. The mixing device 22 is arranged on the desulfurization tank 21. The mixing device 22 includes a mixing shaft 221, a mixing blade 222 and a mixing drive 223. The mixing shaft 221 is positioned and rotatably installed in the desulfurization tank 21. The mixing blade 222 is spirally arranged on the mixing shaft 221. The mixing drive 223 is arranged at one end of the mixing shaft 221 to control the rotation of the mixing shaft 221. The mixing drive 223 is also extended and fixed on the bracket 13. Adding the mixing device 22 can effectively prevent the accumulation and blockage of materials during the process of incoming and outgoing materials and facilitate the uniform mixing of multiple materials, which is conducive to the smooth transportation of materials and ensures the stability of the overall transportation situation.

[0038] like Figure 1 , Figure 2 and Figure 3 As shown, the desulfurization outlet 211 is arranged at one side of the bottom of the desulfurization tank 21, and a sealing cover 212 is also arranged at the desulfurization outlet 211. The sealing cover 212 is hingedly arranged with the desulfurization tank 21 and connected with a cover opening drive 213. The cover opening drive 213 is a telescopic motor and is fixed in the bracket 13. The output end of the cover opening drive 213 is hinged with the bottom of the sealing cover 212. During the desulfurization operation, the sealing cover 212 and the desulfurization tank 21 are closed to ensure the stability of the working environment air pressure, etc. After the desulfurization operation is completed, the cover opening drive 213 is telescopically driven to open the sealing cover 212, so that the desulfurized material falls from the desulfurization tank 21. The cover is opened and the material is dropped by the cover opening drive 213, avoiding the danger of manual operation, and the dropping process is automated and highly safe.

[0039] like Figure 3As shown, the weighing bucket 31 is arranged below the desulfurization outlet 211, and the height of the weighing bucket 31 near the cover opening drive 213 is lower than the height of the weighing bucket 31 far from the cover opening drive 213, and the bottom of the weighing bucket 31 is connected to the feeding pipe 32. Baffles can be added to the front and rear sides of the weighing bucket 31 to reduce the splashing of materials after the cover is opened. The weighing bucket 31 directly receives the falling materials and weighs them before quantitatively conveying them to the refining device 4. The top of the weighing bucket 31 is tilted to avoid structural interference with the cover opening drive 213 when opening the cover, and reduce the collision between the sealing cover 212 and the weighing bucket 31.

[0040] like Figure 3 and Figure 4 As shown, the feeding pipe 32 includes a receiving pipe 321, an underground pipe 322 and a lifting pipe 323 which are connected in sequence. The receiving pipe 321 is arranged below the weighing bucket 31 and a feeding moving part 3211 is arranged at one end of the receiving pipe 321 away from the underground pipe 322. The underground pipe 322 is arranged vertically with the receiving pipe 321. One end of the lifting pipe 323 is connected to the underground pipe 322 and the other end is connected to the feeding bin 33. The height of the lifting pipe 323 close to the feeding bin 33 is greater than the height of the lifting pipe 323 away from the feeding bin 33. The feeding pipe 32 with a multi-stage design can increase the material transportation distance, thereby avoiding the burning and sticking of the material due to excessive temperature, avoiding affecting the operation of the equipment, and ensuring the safety of work and the quality of the discharged material. The underground pipe 322 is used for transportation, which increases the material transportation distance while reducing the occupation of the surface area and effectively utilizing the space structure.

[0041] like Figure 4 and Figure 5 As shown, the feeding bin 33 includes a feeding tank 331 and a feeding rack 332. The feeding tank 331 is arranged on the feeding rack 332. The feeding tank 331 is provided with an inlet 3311 on the top and an outlet 3312 on the bottom. Overflow ports 3313 are symmetrically arranged on both sides of the inlet 3311. The height of the overflow ports 3313 is greater than that of the inlet 3311. The bottom of the overflow ports 3313 is connected to the feeding tank 331. A material level switch 33131 is arranged on the overflow ports 3313. The outlet 3312 is connected to the refining device 4 by a conveyor belt or other device. After desulfurization, the material is fed into the feeding tank 331. The overflow ports 3313 on both sides of the inlet 3311 can observe the material transportation on the one hand, and the material level switch 33131 arranged on the other hand can prevent the material from being blocked due to the excessive feeding speed of the material. The overflow ports 3313 are also convenient for the subsequent cleaning and maintenance of the feeding tank 331.

[0042] like Figure 5As shown, the feeding bin 33 also includes a stirring device 333 and a pre-kneading device 334. The stirring device 333 is arranged along the length direction of the feeding tank 331. The stirring device 333 includes a stirring shaft 3331, a stirring blade 3332 and a stirring drive 3333. Both ends of the stirring shaft 3331 are positioned and rotatably installed in the feeding tank 331. The stirring blade 3332 is spirally sleeved on the stirring shaft 3331. The stirring drive 3333 is arranged outside the stirring tank and drives the stirring shaft 3331 to rotate. The stirring device 333 stirs and mixes the desulfurized material again to ensure the overall uniformity of the material.

[0043] The pre-kneading device 334 is arranged along the width direction of the feeding tank 331 and below the stirring device 333. The pre-kneading device 334 includes two pre-kneading rollers 3341 arranged opposite to each other, and the pre-kneading rollers 3341 are relatively rotatably installed in the discharge port 3312. The material is first simply kneaded once under the interaction of the pre-kneading rollers 3341 to ensure the plasticity of the kneading, so that the subsequent reclaimed rubber refining is more uniform. The closed state during pre-kneading can reduce the contact between dust and the material, which is helpful to improve the quality of the product later.

[0044] The working principle and use method of the present material-dividing and feeding production device are as follows: the rubber particles in the main silo or the large silo are transferred to the material-dividing silo 11, the material-dividing silo 11 performs material-dividing proportioning and conveys the corresponding materials to the desulfurization tank 21, the materials in the multiple material-dividing silos 11 are first mixed and desulfurized in the desulfurization tank 21 at one time, the desulfurized materials fall onto the weighing bucket 31 from the desulfurization outlet 211, the weighing bucket 31 weighs and conveys a fixed amount of desulfurized materials to the feeding silo 33 through the feeding pipe 32, the materials are mixed again in the feeding tank 331 and some particles are pre-kneaded, and then conveyed to the continuous refiner 41 in the refining device 4 for refining.

[0045] The above description shows and describes the preferred embodiments of the utility model. As mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A material-dividing and feeding production device, characterized in that: The invention comprises a material distribution device (1), a desulfurization device (2), a feeding device (3) and a refining device (4) which are connected in sequence. The material distribution device (1) comprises a plurality of material distribution bins (11) and a plurality of material distribution pipes (12). One end of the material distribution pipes (12) is connected to the material distribution bins (11) and the other end is connected to the desulfurization device (2). A desulfurization outlet (211) is arranged below the desulfurization device (2). One end of the material feeding device (3) is arranged below the desulfurization outlet (211) and the other end is connected to the refining device (4). The material feeding device (3) comprises a weighing bucket (31), a feeding pipe (32) and a feeding bin (33). The two ends of the feeding pipe (32) are respectively connected to the weighing bucket (31) and the feeding bin (33). The feeding bin (33) is arranged next to the refining device (4). The refining device (4) is a plurality of continuously arranged refining machines (41).

2. A material-dividing and feeding production device according to claim 1, characterized in that: The distribution bins (11) are all arranged above the bracket (13), each of the distribution bins (11) is connected to a dust removal device (111), the distribution pipes (12) are arranged corresponding to the distribution bins (11), and each of the distribution pipes (12) is provided with a control valve (121).

3. A material-dividing and feeding production device according to claim 2, characterized in that: The desulfurization device (2) comprises a desulfurization tank (21) and a mixing device (22); the desulfurization tank (21) is arranged in a support (13) and below a material distribution bin (11); the mixing device (22) is arranged on the desulfurization tank (21); the mixing device (22) comprises a mixing shaft (221), mixing blades (222) and a mixing drive (223); the mixing shaft (221) is positioned and rotatably installed in the desulfurization tank (21); the mixing blades (222) are spirally arranged on the mixing shaft (221); and the mixing drive (223) controls the rotation of the mixing shaft (221).

4. A material-dividing and feeding production device according to claim 3, characterized in that: The desulfurization outlet (211) is arranged at one side of the bottom of the desulfurization tank (21). A sealing cover (212) is also arranged at the desulfurization outlet (211). The sealing cover (212) is hingedly arranged with the desulfurization tank (21) and is connected to a cover opening drive (213). The cover opening drive (213) is a telescopic motor and is fixed in a bracket (13). The output end of the cover opening drive (213) is hingedly connected to the bottom center of the sealing cover (212).

5. A material-dividing and feeding production device according to claim 4, characterized in that: The weighing hopper (31) is arranged below the desulfurization outlet (211), and the height of the weighing hopper (31) close to the cover opening drive (213) is lower than the height of the weighing hopper (31) away from the cover opening drive (213). The bottom of the weighing hopper (31) is connected to the feeding pipe (32).

6. A material-dividing and feeding production device according to claim 5, characterized in that: The feeding pipe (32) comprises a receiving pipe (321), an underground pipe (322) and a lifting pipe (323) which are connected in sequence. The receiving pipe (321) is arranged below the weighing bucket (31) and a feeding moving part (3211) is arranged at one end of the receiving pipe (321) away from the underground pipe (322). The axis of the underground pipe (322) is arranged perpendicular to the axis of the receiving pipe (321). One end of the lifting pipe (323) is connected to the underground pipe (322) and the other end is connected to the feeding bin (33). The height of the lifting pipe (323) close to the feeding bin (33) is greater than the height of the lifting pipe (323) away from the feeding bin (33).

7. A material-dividing and feeding production device according to claim 6, characterized in that: The feeding bin (33) comprises a feeding tank (331) and a feeding rack (332), wherein the feeding tank (331) is arranged on the feeding rack (332), an inlet (3311) is provided on the top of the feeding tank (331) and an outlet (3312) is provided on the bottom, overflow ports (3313) are symmetrically provided on both sides of the inlet (3311), the height of the overflow ports (3313) is greater than the height of the inlet (3311), the bottom of the overflow ports (3313) is connected to the feeding tank (331), a material level switch (33131) is provided on the overflow ports (3313), and the outlet (3312) is connected to the refining device (4).

8. A material-dividing and feeding production device according to claim 7, characterized in that: The feeding bin (33) further comprises a stirring device (333) and a pre-kneading device (334); the stirring device (333) is arranged along the length direction of the feeding tank (331); the stirring device (333) comprises a stirring shaft (3331), a stirring blade (3332) and a stirring drive (3333); both ends of the stirring shaft (3331) are positioned and rotatably installed in the feeding tank (331); the stirring blade (3332) is spirally sleeved on the stirring shaft (3331); the stirring drive (3333) is arranged outside the stirring tank and drives the stirring shaft (3331) to rotate; the pre-kneading device (334) is arranged along the width direction of the feeding tank (331) and is arranged below the stirring device (333); the pre-kneading device (334) comprises two pre-kneading rollers (3341) arranged opposite to each other.

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