A new type of suspension type grinding and mixing machine set

Abstract

The application discloses a novel suspension type grinding and mixing machine group, which comprises a feeding and pre-melting single screw extruder, a suspension type grinding and mixing machine and a discharging single screw extruder arranged in sequence. The feeding and pre-melting single screw extruder carries out metering feeding and pre-melting, then feeds the material into the suspension type grinding and mixing machine to carry out mixing and dispersion, and finally feeds the material into the discharging single screw extruder to build pressure and extrude. The suspension type grinding and mixing machine comprises a transmission assembly, a rotating kneading unit and a mixer cylinder, the rotating kneading unit is suspended in the mixer cylinder, the output shaft of the transmission assembly is connected with the mandrel of the rotating kneading unit, the rotating kneading unit is composed of the mandrel, a conveying section and a mixing section, the tail end of the mandrel is lengthened to extend into the transmission box, the other end of the mandrel is in a conical structure, and the conveying section and the mixing section are sequentially sleeved outside. The application adopts a novel mixing principle, the kneading shaft of the kneading machine is completely suspended in the cylinder, and the friction problem between the mixing components and the cylinder is fundamentally avoided.

Description

Technical Field

[0001] This invention relates to a mixing unit, specifically a novel suspension-type rolling mill mixing unit. Background Technology

[0002] Common equipment used for continuous polymer mixing includes screw extruders and continuous internal mixers. In these two types of equipment, the screw / rotor, the mixing component, requires material to support its rotation. Therefore, when there is a shortage of material, the screw sags due to its own weight, or when rotating at high speed, the material's hardness or viscosity often causes a reaction force at the meshing point, which compresses the screw / rotor and other mixing components, resulting in slight bending. This bending leads to friction between the screw / rotor and between the screw / rotor and the inner wall of the barrel.

[0003] Such instantaneous friction causes a sudden increase in shear heat on the material, which increases the degree of thermal decomposition. In more severe cases, such friction can produce powdery metal shavings, affecting material properties such as gloss, impurities, and excessive metal ion content. Summary of the Invention

[0004] To solve the problem of friction between the mixing components and the barrel, this invention provides a novel suspended rolling mill unit that adopts a completely new mixing principle, fundamentally avoiding the problem of friction between the mixing components and the barrel.

[0005] This invention provides the following technical solution:

[0006] A novel suspended grinding and mixing mill unit includes a feeding pre-melting single-screw extruder, a suspended grinding and mixing mill, and a discharging single-screw extruder arranged in sequence. The feeding pre-melting single-screw extruder performs metering feeding and pre-melting, then feeds the material into the suspended grinding and mixing mill for mixing and dispersion, and finally feeds the material into the discharging single-screw extruder for pressure extrusion. The suspended grinding and mixing mill includes a transmission assembly, a rotary kneading unit, and a mixing mill barrel. The rotary kneading unit is suspended inside the mixing mill barrel. The output shaft of the transmission assembly is connected to the mandrel of the rotary kneading unit. The rotary kneading unit consists of a mandrel, a conveying section, and a mixing section. The tail end of the mandrel is extended and extends into the transmission box, supported by multiple bearings in the transmission box, so that the conveying section and the mixing section at its other end are stably suspended. The other end of the mandrel has a conical structure, with the conveying section and the mixing section sequentially fitted on the outside.

[0007] Furthermore, the conveying section is a cylindrical conveying part with a spiral thread structure on its surface, used to convey the material that enters the cylinder from the upstream into the downstream mixing section in a forward direction. During the conveying process, the material is heated simultaneously by the heated mixing drum. The mixing section is a conical mixing section with the diameter of the cone gradually increasing and multiple radial spiral ridges on its surface.

[0008] Furthermore, the feed pre-melted single-screw extruder consists of an anti-bridging hopper, a transmission assembly, a feed screw, and a feed barrel. The feed screw is suspended inside the feed barrel, and the feed barrel is connected below the anti-bridging hopper. The transmission assembly drives the tail of the feed screw through a hollow output shaft. The entire tail of the feed screw's screw core is inserted into the hollow output shaft.

[0009] Furthermore, the hollow output shaft is supported by multiple sets of bearings within the transmission assembly, and the tail end of the screw spindle extends out of the hollow output shaft and is connected by a reinforcing cap.

[0010] Furthermore, the rotary kneading unit is divided into a conveying section and a mixing section. The diameter of the conveying section is d1φ=100~800mm; the diameter of the mixing section is: major diameter d2φ=200~1600mm, minor diameter d1φ=100~800mm, and taper C=10~40°.

[0011] Furthermore, the length-to-diameter ratio of the mixing mill cylinder is L / D = 2~5; the diameter of the conveying section is d = 101~801 mm; the diameter of the mixing section is: major diameter φ = 201~1601 mm, minor diameter φ = 101~801 mm, and taper is 10~40°.

[0012] Furthermore, the gap between the outer diameter of the rotary kneading unit and the inner wall of the barrel forms a kneading cavity.

[0013] Furthermore, the discharge single-screw extruder includes a main motor, a transmission box, a single screw, and an extruder barrel. The main motor drives the transmission box, and the transmission box output shaft is connected to the tail of the single screw. The single screw is suspended inside the extruder barrel, and the entire single screw mandrel at the tail of the single screw is inserted into the transmission box output shaft.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. This invention consists of a first-stage equipment, a second-stage equipment, and a third-stage equipment connected in series. The feeding pre-melting single-screw extruder is the first-stage equipment, the core equipment, the suspension milling and mixing mill, is the second-stage equipment, and the third equipment is the discharging single-screw extruder, corresponding to the three process stages of metering feeding and pre-melting, mixing and dispersing, and pressure building extrusion, respectively. The core equipment is equipped with the upstream feeding pre-melting single-screw extruder and the downstream discharging single-screw extruder. Both upstream and downstream equipment have a structure in which the screw is fully suspended in the barrel, realizing continuous production processes of metering feeding, pre-melting, mixing and extrusion, and discharging and conveying.

[0016] 2. The rotary kneading unit of the suspended grinding and mixing mill adopts a short length-to-diameter ratio design. The rotary kneading unit is completely suspended inside the mixing mill barrel, which completely avoids the kneading unit being squeezed by materials and scraped by the barrel. This avoids the problems that twin-screw extruders cannot fully lift the screw when dealing with low-viscosity melts, and the problems that high-viscosity materials squeeze the screw, causing friction between the screw and the barrel.

[0017] 3. The rotating kneading unit of the suspended rolling mill works in conjunction with the barrel, and the gap between the two forms a kneading cavity. The material moves forward spirally around the kneading unit in the kneading cavity and is subjected to the kneading and rolling action in the cavity. It is a flexible mixture with excellent mixing and dispersion effect. The material is subjected to smooth compression and shearing distribution throughout the mixing process.

[0018] This invention adopts a novel mixing principle, in which the kneading shaft of the kneader is completely suspended inside the barrel, fundamentally avoiding the friction problem between the aforementioned mixing components and the barrel. Attached Figure Description

[0019] Figure 1 This is a diagram illustrating the comprehensive features of the suspended grinding and mixing mill of the present invention;

[0020] Figure 2 This is a comparison chart of the temperature rise characteristics of the suspended milling and mixing unit of the present invention and the existing twin-screw extruder;

[0021] Figure 3 This is a comparison chart of the unit energy consumption of the suspended grinding and mixing unit of the present invention and the existing twin-screw extruder;

[0022] Figure 4 This is a perspective view of the present invention;

[0023] Figure 5 This is a schematic diagram of the complete unit process of the present invention;

[0024] Figure 6 This is a schematic diagram of the pre-melted single-screw extruder of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of the suspension grinding and mixing mill of the present invention;

[0026] Figure 8 This is a schematic diagram of the internal structure of the suspended grinding and mixing mill of the present invention;

[0027] Figure 9 This is the book Figure 7 Schematic diagram showing the relationship between the rotary kneading unit and the barrel cavity;

[0028] Figure 10 This is a schematic diagram showing the relationship between taper, major diameter, minor diameter, and barrel clearance;

[0029] Figure 11 This is a schematic diagram of the structure of the single-screw extruder of the present invention.

[0030] In the diagram: 1. Feeding pre-melting single-screw extruder; 2. Suspension milling and mixing mill; 3. Discharge single-screw extruder;

[0031] 101. Anti-bridging hopper; 102. Transmission assembly; 103. Feeding screw; 104. Feeder barrel; 105. Transmission box output shaft; 106. Screw spindle tail; 107. Reinforcing cap.

[0032] 201. Transmission assembly; 202. Rotary kneading unit; 203. Mandrel; 204. Conveying section; 205. Mixing section; 206. Side feed inlet; 207. Mixing mill barrel; 208. Horizontal adjustment motor; 209. Bearing; 210. Kneading chamber;

[0033] 301. Main motor; 302. Transmission box; 303. Single screw; 304. Extruder barrel; 305. Transmission box output shaft; 306. Single screw mandrel; 307. Parallel cap. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figure 4-5 The present invention discloses a novel suspended milling and mixing unit, comprising a feeding pre-melting single-screw extruder 1, a suspended milling and mixing mill 2, and a discharging single-screw extruder 3 arranged in sequence. The feeding pre-melting single-screw extruder 1 performs metering feeding and pre-melting, and then feeds the material into the suspended milling and mixing mill 2 for mixing and dispersion. Finally, the material is fed into the discharging single-screw extruder 3 for pressure extrusion.

[0036] The complete set of equipment consists of three machines connected in series, forming a continuous, automated, and highly efficient compounding and extrusion system. The feeding pre-melting single-screw extruder is the first-stage equipment, the core equipment, the suspension milling and mixing mill, is the second-stage equipment, and the third-stage equipment is the discharging single-screw extruder. These correspond to the three process stages of metering feeding and pre-melting, compounding and dispersing, and pressure building extrusion, respectively, achieving a continuous production process.

[0037] Figure 6As shown, the feeding pre-melting single-screw extruder 1 can adopt a single-screw type feeder, which mainly consists of an anti-bridging hopper 101, a transmission assembly 102, a feeding screw 103, and a feeder barrel 104. The feeding screw 103 is suspended inside the feeder barrel 104. The feeder barrel 104 is connected to the bottom of the anti-bridging hopper 101. The transmission assembly 102 drives the tail of the feeding screw 103 through a hollow output shaft 105.

[0038] The screw spindle tail 106 of the feeding screw 103 is inserted entirely into the hollow output shaft 105. The hollow output shaft 105 is supported by multiple sets of bearings in the transmission assembly 102. The screw spindle tail 106 extends out of the hollow output shaft 105 and is connected by a reinforcing cap 107.

[0039] The anti-bridging hopper 101 has a conical structure. The top of the hopper is equipped with an anti-bridging stirring device. The stirring motor drives the stirring paddle to stir the material in the hopper to prevent bridging problems in the material.

[0040] The transmission assembly 102 consists of a variable frequency motor, a reducer, and a transmission box. The reducer and transmission box reduce the output speed and distribute the output shaft in the same direction. The output shaft of the reducer is connected to the tail of the feeding screw.

[0041] The feeding screw 103 is suspended inside the feeding barrel 104, and it is a single screw. The feeding rate is adjusted by changing the speed of the variable frequency motor, which in turn adjusts the screw speed.

[0042] The screw mandrel 106 has an insert-type flat key connection at its tail. The output shaft 105 of the transmission box is a hollow shaft (its inner hole mates with the screw mandrel), and the entire tail of the screw mandrel is inserted into the hollow output shaft. The screw mandrel and the inner wall of the hollow output shaft are circumferentially fixed by a flat key, and torque is transmitted by compression from the side of the key. The tail end of the screw mandrel extends out of the hollow shaft and is reinforced with a cap 107 to withstand the reaction force of the melt. The hollow output shaft is supported by multiple sets of bearings in the transmission box. The feed screw indirectly obtains stable radial / axial support through the tight fit between the screw mandrel and the hollow shaft and the flat key, and is suspended above the barrel.

[0043] Figure 7 This is a schematic diagram of the structure of the suspension grinding and mixing mill of the present invention.

[0044] The suspended grinding and mixing mill includes a transmission assembly 201, a rotary kneading unit 202, and a mixing drum 207. The rotary kneading unit 202 is suspended inside the mixing drum 207. The output shaft of the transmission assembly 201 is connected to the spindle 203 of the rotary kneading unit 202.

[0045] The transmission assembly 201 consists of a main motor and a transmission box. The main motor is connected to the reducer and the input shaft of the transmission box, and the output shaft of the transmission box is connected to the spindle of the rotary kneading unit 202. The main motor has a power of 15~1000 kW, is an AC variable frequency motor, and is equipped with a frequency converter to regulate the motor speed; the speed ratio of the reducer and the transmission box is i=10~30, and the maximum output speed is 20~200 rpm.

[0046] Figure 8 and Figure 9 As shown, the rotary kneading unit 202 consists of a mandrel 203, a conveying section 204, and a mixing section 205. The mandrel 203 has an elongated tail end that extends deep into the transmission housing, where it is supported by multiple bearings 209. This allows the conveying section 204 and mixing section 205 at the other end to achieve high rigidity, high coaxiality, and stable suspension. The other end of the mandrel 203 has a tapered structure, with the conveying section 204 and mixing section 205 sequentially fitted onto it and secured by a tapered key.

[0047] Figure 10 As shown, the length-to-diameter ratio of the rotary kneading unit is L / D = 2~5; the rotational speed is 10~100 rpm; the diameter of the conveying section is d1φ = 100~800 mm; the diameter of the mixing section is: major diameter d2φ = 200~1600 mm, minor diameter d1φ = 100~800 mm, and taper C = 10~40°; the screw material is nitrided alloy steel or high-speed tool steel.

[0048] The length-to-diameter ratio of the mixing mill barrel 207 is L / D=2~5; the diameter of the conveying section is d: φ=101~801 mm; the diameter of the mixing section is: major diameter φ=201~1601 mm, minor diameter φ=101~801 mm, taper 10~40°; the material is nitrided alloy steel, high-speed tool steel, stainless steel, etc.

[0049] Table 1. Relationship between taper, major diameter, minor diameter, and barrel clearance.

[0050] Small end diameter (mm) d1 Gap between the small end and the cylinder (mm) δ1 Large end diameter (mm) d2 Gap between the large end and the cylinder (mm) δ2 Axial length (mm) L taper C = (d2 - d1) / L Distance from point P to the small end (mm) x Diameter at point P (mm) dx=d1+C*x Gap between point P and the cylinder (mm) δx = δ1 + (δ2 - δ1) / L*x

[0051] The mixing mill barrel 207 is externally encased in an electric heater, and a cooling water channel is provided inside the barrel. Heating / cooling of the barrel is controlled by sensors and a temperature controller. The barrel has a feed inlet and a discharge outlet. The side feed inlet 206 is located on the transmission box side and is connected to the feeder barrel body. The discharge outlet is on the other end face and connects to the feed inlet of the downstream single-screw extruder via a discharge box.

[0052] The rotary kneading unit of the suspended grinding mill has two sections. The first section is a cylindrical conveying section with a spiral threaded structure on its surface, used to forward convey the material entering the cylinder from the upstream to the downstream mixing section. During the conveying process, the heated cylinder simultaneously heats the material. The second section is a conical mixing section, with the diameter of the cone gradually increasing and multiple radial spiral ridges on its surface.

[0053] Operating principle:

[0054] Figure 9 As shown, the barrel 207 corresponds to the rotary kneading unit 202. The barrel is also divided into cylindrical and conical sections. The gap between the outer diameter of the rotary kneading unit 202 and the inner wall of the barrel 207 forms the kneading cavity 210. When the cone rotates, the material on the surface of the kneading unit is subjected to centrifugal force and is squeezed, dragged, and kneaded by the barrel. At the same time, the material is heated by the barrel and melts, while the components are dispersed and homogenized. During the entire kneading process, as the material is conveyed by the rotating cone, the linear velocity it experiences gradually increases with the increase in the diameter of the cone, and the path the material travels also increases. While the material is being kneaded by rotation, the radial spiral ridges on the surface of the cone can guide the movement path of the material, improve the mixing effect, and prolong the residence time of the material in the barrel.

[0055] The rotary kneading unit 202 can be moved horizontally as a whole by the horizontal adjustment motor 208. By moving horizontally, the gap between it and the inner wall of the barrel can be adjusted, thereby changing the kneading intensity. Moving it towards the transmission box can reduce the gap and increase the kneading intensity, and conversely, move it away from the transmission box to increase the gap and decrease the kneading intensity. Through the above adjustments, it can adapt to the mixing requirements of different materials.

[0056] Figure 11 As shown, the discharge single-screw extruder 3 includes a main motor 301, a transmission box 302, a single screw 303, and an extruder barrel 304. The main motor 301 drives the transmission box 302. The transmission box output shaft 305 of the transmission box 302 is connected to the tail of the single screw 303. The single screw 303 is suspended inside the extruder barrel. The single screw mandrel 306 at the tail of the single screw 303 is inserted entirely into the transmission box output shaft 305.

[0057] The input shaft of the transmission box 302 is connected to the output shaft of the motor. The transmission box serves to reduce the output speed and increase the output torque. The output shaft of the transmission box is connected to the tail of the single screw.

[0058] The single screw 303 is placed inside the extruder barrel 304 and adopts a conveyor screw structure. The screw speed is adjusted by adjusting the speed of the variable frequency motor, thereby adjusting the extrusion volume of the screw.

[0059] The screw mandrel 306 features an insert-type flat key connection structure. The output shaft 305 of the transmission box is a hollow shaft (its inner hole mates with the screw mandrel). The entire screw tail mandrel is inserted into the hollow output shaft (transmission box output shaft 305). The screw mandrel and the inner wall of the hollow output shaft are circumferentially fixed by a flat key, and torque is transmitted by compression from the side of the key. The tail end of the screw mandrel extends out of the hollow shaft and is supported by a cap 307 to withstand the melt's counterforce. The hollow output shaft is supported by multiple sets of bearings within the transmission box. The single screw 303 indirectly obtains stable radial / axial support through the tight fit between the single screw mandrel 306 and the hollow output shaft, along with the flat key, and is suspended above the extruder barrel 304.

[0060] The feed inlet of the extruder barrel 304 is connected to the discharge outlet of the second-stage suspension mill, and the discharge end is connected to the downstream granulation equipment. The barrel is externally encased in an electric heater, and the interior of the barrel is equipped with cooling water channels. The heating / cooling of the barrel is controlled by sensors and temperature controllers.

[0061] The rotating kneading unit spindle of the suspended grinding and mixing mill is reinforced with multiple bearings at one end within the transmission box, and also features a short length-to-diameter ratio design. The rotating kneading unit is completely suspended inside the barrel, completely preventing it from being squeezed by materials or scraped against the barrel. This avoids the problems encountered in twin-screw extruders where the screw cannot be fully lifted when handling low-viscosity melts, or where high-viscosity materials squeeze the screw, leading to friction between the screw and the barrel.

[0062] The rotating kneading unit of the suspension mill works in conjunction with the barrel, with the gap between them forming a kneading chamber. The material moves spirally forward around the kneading unit within this chamber, undergoing crushing and kneading action. This results in a flexible mixture with excellent mixing and dispersion effects. Throughout the mixing process, the material experiences smooth distribution of compression and shear. Unlike screw extruders, there is no high-pressure mixing zone created by shearing elements. This avoids the problem of some low-melting-point raw materials melting and encapsulating unmelted materials before being fully plasticized, resulting in the remaining material being trapped inside the melt and lacking shear and heat transfer, ultimately forming small, incompletely plasticized particles with "fish-eye" or "gel" appearance.

[0063] The gap between the outer diameter of the rotating kneading unit and the inner wall of the barrel in the suspended grinding and mixing mill is adjustable, and the gap value is displayed by a sensor. By adjusting the gap, the kneading intensity of the materials can be changed (the smaller the gap, the greater the kneading intensity) to adapt to the mixing requirements of different materials.

[0064] Figure 1 This is a diagram illustrating the comprehensive characteristics of the suspended grinding and mixing mill of the present invention. The curve shows that the pressure rises rapidly from 0, and after being pressurized by the conveying section, it reaches the maximum pressure range at the entrance of the conical mixing section. In the latter half, as the outer diameter of the cone gradually increases, the pressure gradually decreases until the material is discharged, demonstrating a continuous and impact-free mixing process.

[0065] Figure 2This is a comparison chart of the temperature rise characteristics of the suspended grinding and mixing mill unit of this invention and the existing twin-screw extruder. Curve characteristics: the twin-screw extruder curves upward (the stronger the shear, the faster the temperature rise), while the suspended grinding and mixing mill curves a gentle straight line, demonstrating the advantages of flexible kneading and low temperature rise, making it suitable for heat-sensitive materials.

[0066] Curve characteristics: The twin-screw extruder curves upward (the stronger the shear, the faster the temperature rises), while the suspension milling and mixing mill curves on a gentle straight line, demonstrating the advantages of flexible kneading and low temperature rise, making it suitable for heat-sensitive materials.

[0067] Figure 3 This is a comparison chart of the unit energy consumption of the suspended grinding and mixing unit of this invention and the existing twin-screw extruder.

[0068] Curve characteristics: At the same rotational speed, the unit energy consumption of the suspension grinding and mixing mill is only 50% to 70% of that of the twin-screw mill, demonstrating its high efficiency and energy-saving characteristics.

[0069] This invention employs a novel mixing principle, where the kneading shaft of the kneader is completely suspended within the barrel, fundamentally avoiding the friction problem between the aforementioned mixing components and the barrel. Furthermore, it is equipped with an upstream feeding pre-melting single-screw extruder and a downstream discharging single-screw extruder, both with the screws fully suspended within the barrel, enabling continuous metering feeding, pre-melting, mixing extrusion, and discharge conveying production processes.

[0070] This invention is applicable to special materials for which friction between the screw and barrel must be strictly prevented during the mixing process to avoid affecting specific performance characteristics. Examples include materials with high requirements for metal impurities, such as solid-state lithium battery electrolytes, various high-end medical polymer materials, and highly insulating polymers.

[0071] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel suspended grinding and mixing mill unit, characterized in that: The extrusion assembly includes a feeding pre-melting single-screw extruder (1), a suspension milling and mixing mill (2), and a discharge single-screw extruder (3) arranged in sequence. The feeding pre-melting single-screw extruder (1) performs metering feeding and pre-melting, and then feeds the material into the suspension milling and mixing mill (2) for mixing and dispersion. Finally, the material is fed into the discharge single-screw extruder (3) for pressure extrusion. The suspension milling and mixing mill includes a transmission assembly (201), a rotary kneading unit (202), and a mixing mill barrel (207). The rotary kneading unit (202) is suspended and placed inside the mixing mill barrel (207). The output shaft of the moving component (201) is connected to the spindle (203) of the rotary kneading unit (202). The rotary kneading unit (202) consists of the spindle (203), the conveying section (204), and the mixing section (205). The tail end of the spindle (203) is extended and extends into the transmission box. It is supported by multiple bearings (209) in the transmission box, so that the conveying section (204) and the mixing section (205) at the other end are stably suspended. The other end of the spindle (203) is conical, and the conveying section (204) and the mixing section (205) are sequentially fitted on the outside.

2. The novel suspended grinding and mixing unit according to claim 1, characterized in that: The conveying section (204) is a cylindrical conveying section with a spiral thread structure on its surface, used to convey the material that is conveyed into the cylinder from the upstream to the downstream mixing section. During the conveying process, the material is heated in conjunction with the heated mixing cylinder. The mixing section (205) is a conical mixing section with the diameter of the cone gradually increasing and multiple radial spiral ridges on its surface.

3. The novel suspended grinding and mixing unit according to claim 1, characterized in that: The feeding pre-melting single screw extruder (1) consists of an anti-bridging hopper (101), a transmission assembly (102), a feeding screw (103), and a feeding barrel (104). The feeding screw (103) is suspended inside the feeding barrel (104). The feeding barrel (104) is connected to the bottom of the anti-bridging hopper (101). The transmission assembly (102) drives the tail of the feeding screw (103) through a hollow output shaft (105). The tail (106) of the screw core of the feeding screw (103) is inserted entirely into the hollow output shaft (105).

4. The novel suspended grinding and mixing unit according to claim 3, characterized in that: The hollow output shaft (105) is supported by multiple sets of bearings in the transmission assembly (102), and the tail end (106) of the screw spindle extends out of the hollow output shaft (105) and is connected by a reinforcing cap (107).

5. A novel suspended grinding and mixing unit according to claim 1, characterized in that: The rotary kneading unit is divided into a conveying section and a mixing section. The diameter of the conveying section is d1φ=100~800 mm; the diameter of the mixing section is: major diameter d2φ=200~1600 mm, minor diameter d1φ=100~800 mm, and taper C=10~40°.

6. The novel suspended grinding and mixing unit according to claim 1, characterized in that: The mixing mill cylinder (207) has the following length-to-diameter ratio: L / D=2~5; conveying section diameter d: φ=101~801 mm; mixing section diameter: major diameter φ=201~1601 mm, minor diameter φ=101~801 mm, and taper 10~40°.

7. The novel suspended grinding and mixing unit according to claim 1, characterized in that: The gap between the outer diameter of the rotary kneading unit (202) and the inner wall of the barrel (207) forms a kneading cavity (210).

8. The novel suspended grinding and mixing unit according to claim 1, characterized in that: The discharge single-screw extruder (3) includes a main motor (301), a transmission box (302), a single screw (303), and an extruder barrel (304). The main motor (301) drives the transmission box (302). The transmission box output shaft (305) of the transmission box (302) is connected to the tail of the single screw (303). The single screw (303) is suspended in the extruder barrel (304). The single screw mandrel (306) at the tail of the single screw (303) is inserted into the transmission box output shaft (305).

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