Kneading machine for preparing elastic plastic

Abstract

The utility model discloses a kneading machine for preparing elastic plastics, which comprises a kneading tank body, a driving component and a kneading paddle component, and a first turntable is rotationally connected in the kneading tank body; the driving assembly comprises a motor, a linkage mechanism, a main rotating shaft, a driving gear, an inner gear ring, a driven gear and a driven rotating shaft, the main rotating shaft is rotationally connected to the kneading tank body, the linkage mechanism is connected with the motor and the main rotating shaft, the driving gear is connected to the main rotating shaft, the inner gear ring is connected to the kneading tank body, and the two opposite sides of the driven gear are in meshed connection with the driving gear and the inner gear ring correspondingly; the driven gear is connected to the driven rotating shaft which is rotationally connected to the first turntable; the central kneading paddle is connected to the main rotating shaft, the peripheral kneading paddles are connected to the auxiliary rotating shaft, and the peripheral kneading paddles surround the periphery of the central kneading paddle. According to the kneading device, the kneading stirring uniformity can be effectively improved through kneading in a multi-dimensional space, the kneading processing effect can be improved, the kneading efficiency can be effectively improved, and the whole structure is compact and reliable.

Description

Technical Field

[0001] The utility model relates to the field of plastic preparation, in particular to a kneading machine for preparing elastic plastics. Background Art

[0002] In the process of preparing elastic plastics, kneading machine is an indispensable processing equipment. Its function is to knead, mix, vulcanize and polymerize high-viscosity, elastic-plastic materials. Specifically, it can evenly mix the materials mixed according to the ratio and promote the uniformity of chemical reactions.

[0003] TPU (Thermoplastic polyurethanes) is a kind of elastic plastic. It needs to be evenly crushed and mixed in a kneader during preparation. In traditional technology, a kneader is usually equipped with one or two stirring paddles, and a motor is set to drive the stirring paddles to stir and knead the materials. This kind of kneader can only stir and mix the materials to a limited extent, and the stirring and kneading effect is uneven and the kneading efficiency is low. In order to achieve the ideal kneading effect, it is often necessary to extend the stirring time or increase the speed of the stirring paddle, which will lead to a significant increase in the energy consumption of the kneading preparation. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a kneading machine for preparing elastic plastics, which can effectively improve the uniformity of stirring and kneading, has good kneading effect and high kneading efficiency.

[0005] According to an embodiment of the utility model, a kneading machine for preparing elastic plastics comprises a kneading tank body, a driving assembly and a kneading paddle assembly, wherein the driving assembly is arranged outside the kneading tank body, the kneading paddle assembly is arranged inside the kneading tank body, and a first rotating disk is rotatably connected inside the kneading tank body;

[0006] The driving assembly includes a motor, a linkage mechanism, a main rotating shaft, a driving gear, an inner gear ring, n driven gears and n slave rotating shafts, where n is an integer greater than 1, the main rotating shaft is rotatably connected to the kneading tank body, the main rotating shaft is colinear with the axis of the first rotating disk, the linkage mechanism connects the motor and the main rotating shaft, the motor is used to drive the main rotating shaft to rotate, the driving gear is connected to the main rotating shaft, the inner gear ring is connected to the kneading tank body, the opposite sides of each driven gear are respectively meshed and connected to the driving gear and the inner gear ring, each driven gear is respectively connected to each slave rotating shaft, and each slave rotating shaft is rotatably connected to the first rotating disk;

[0007] The kneading paddle assembly includes a central kneading paddle and n peripheral kneading paddles. The central kneading paddle is connected to the main rotating shaft, and each peripheral kneading paddle is connected to each slave rotating shaft. The peripheral kneading paddles surround the central kneading paddle. The peripheral kneading paddles have the same shape as the central kneading paddle, so that the central kneading paddle cooperates with each peripheral kneading paddle to knead the raw materials.

[0008] In this embodiment, the central kneading paddle is provided with a central blade spirally arranged around the line where the main shaft is located, and the peripheral kneading paddle is provided with a peripheral blade spirally arranged around the line where the secondary shaft is located, and the spiral winding directions of the central blade and the peripheral blade are opposite.

[0009] In this embodiment, the transmission ratio between the driving gear and the driven gear is greater than or less than 1.

[0010] In this embodiment, the linkage mechanism includes a worm wheel and a worm, the worm is connected to the motor, the worm wheel is connected to the main shaft, and the worm wheel is meshingly connected to the worm.

[0011] In this embodiment, a second turntable is rotatably connected in the kneading tank body, the first turntable and the second turntable are arranged in parallel on opposite sides of the kneading paddle assembly, a central auxiliary shaft coaxial with the main rotating shaft is provided at one end of the central kneading paddle close to the second turntable, and a peripheral auxiliary shaft coaxial with the slave rotating shaft is provided at one end of the peripheral kneading paddle away from the second turntable, and both the central auxiliary shaft and the peripheral auxiliary shaft are rotatably connected to the second turntable.

[0012] In this embodiment, the drive assembly also includes a first sealed bearing, a second sealed bearing, n third sealed bearings and n fourth sealed bearings. The main shaft is rotatably connected to the first turntable via the first sealed bearing, and each central auxiliary shaft is rotatably connected to the second turntable via the second sealed bearing; each slave shaft is rotatably connected to the first turntable via the corresponding third sealed bearing, and each peripheral auxiliary shaft is rotatably connected to the second turntable via the corresponding fourth sealed bearing.

[0013] In this embodiment, n=2, and the two peripheral kneading paddles are located on opposite sides of the central kneading paddle.

[0014] In this embodiment, the outer wall of the kneading tank is covered with a heat-insulating layer.

[0015] The embodiments of the present invention have at least the following beneficial effects:

[0016] The main shaft is driven to rotate by a motor, thereby driving the kneading and driving gears and the driven gears of the inner gear ring to rotate synchronously. While driving the central kneading paddle to rotate around the axis of the main shaft, at least two peripheral kneading paddles can also be driven to rotate around the axis of the slave shaft and around the central kneading paddle. The peripheral kneading paddles and the central kneading paddle are arranged in the same shape. The peripheral kneading paddles can cooperate with the central kneading paddle to form comprehensive and reliable shearing forces and friction forces on different areas in the kneading tank. The kneading in multi-dimensional space can not only effectively improve the uniformity of kneading and stirring, thereby improving the effect of kneading processing, and thus improving the quality of the prepared elastic plastic, but also effectively improve the kneading efficiency, thereby improving the preparation efficiency of the elastic plastic, and effectively reducing the preparation energy consumption; the drive component is provided with a motor as a power source, which can effectively simplify the structure of the drive component, reduce the production cost of the machine, occupy a small area, and can effectively reduce the use cost and maintenance cost. The kneading process can be adjusted and controlled by controlling the speed of the motor, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 It is a three-dimensional structural schematic diagram of a kneading machine for preparing elastic plastics according to an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of a kneading machine for preparing elastic plastics according to an embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the kneading machine for preparing elastic plastics according to an embodiment of the utility model from another perspective.

[0021] Reference numerals:

[0022] Kneading tank 100, first rotating disk 110, second rotating disk 120, thermal insulation layer 130;

[0023] Driving assembly 200, motor 210, linkage mechanism 220, worm wheel 221, worm 222, main rotating shaft 230, driving gear 240, inner gear ring 250, driven gear 260, secondary rotating shaft 270, first sealed bearing 281, second sealed bearing 282, third sealed bearing 283, fourth sealed bearing 284;

[0024] The kneading paddle assembly 300 includes a central kneading paddle 310 , a central blade 311 , a central auxiliary shaft 312 , a peripheral kneading paddle 320 , a peripheral blade 321 , and a peripheral auxiliary shaft 322 . DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, left, right, front, back, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] In the process of preparing elastic plastics, kneading machine is an indispensable processing equipment. Its function is to knead, mix, vulcanize and polymerize high-viscosity, elastic-plastic materials. Specifically, it is to evenly mix the materials mixed according to the ratio and promote the uniformity of chemical reactions. TPU (Thermoplastic polyurethanes) is the full name of thermoplastic polyurethane elastomer rubber, which is an elastic plastic. When preparing, a kneading machine is needed to evenly crush and mix.

[0030] In the related art, a kneading machine is usually provided with one or two stirring paddles, and a motor is provided to drive the stirring paddles to stir and knead the materials. This kneading machine can only stir and mix the materials to a limited extent, and the stirring and kneading effect is uneven and the kneading efficiency is low. This problem is particularly prominent when processing high-viscosity and high-elasticity plastic raw materials. In order to achieve the ideal kneading effect, it is often necessary to extend the stirring time or increase the speed of the stirring paddle, which will lead to a significant increase in the energy consumption of the kneading preparation and increase the preparation cost.

[0031] The following is the attached Figure 1 To Attachment Figure 3 , describing the kneading machine for preparing elastic plastics of the embodiment of the utility model, which can effectively improve the uniformity of stirring and kneading, has good kneading effect and high kneading efficiency.

[0032] Reference Figures 1 to 3 The embodiment of the utility model is a kneading machine for preparing elastic plastics, comprising a kneading tank body 100, a driving assembly 200 and a kneading paddle assembly 300. The kneading tank body 100 is used to contain various raw materials for preparing elastic plastics. The driving assembly 200 is arranged outside the kneading tank body 100, and the kneading paddle assembly 300 is arranged inside the kneading tank body 100. The end surface of the kneading tank body 100 is rotatably connected with a first rotating disk 110, that is, the end surface of the kneading tank body 100 is provided with a first rotating disk 110, and the first rotating disk 110 is rotatably connected to the kneading tank body 100;

[0033] The driving assembly 200 includes a motor 210, a linkage mechanism 220, a main shaft 230, a driving gear 240, an inner gear ring 250, n driven gears 260 and n driven shafts 270, wherein n is an integer greater than 1, that is, n is an integer with a minimum value of 2. The motor 210, the linkage mechanism 220, the main shaft 230, the driving gear 240, the inner gear ring 250 and the n driven gears 260 are all located on the same side of the first rotating disk 110, the main shaft 230 is rotatably connected to the kneading tank 100, the main shaft 230 and the rotating axis of the first rotating disk 110 are colinear, the linkage mechanism 220 connects the motor 210 and the main shaft 230, and the motor 210 is used to drive the main shaft 230 to rotate. The driving gear 240 is coaxially fixedly connected to the main rotating shaft 230, the inner gear ring 250 is fixedly connected to the kneading tank body 100, the opposite sides of each driven gear 260 are respectively meshed with the driving gear 240 and the inner gear ring 250, the inner gear ring 250 and the driving gear 240 are respectively meshed with the opposite sides of each driven gear 260, each driven gear 260 is respectively coaxially fixedly connected to one end of each corresponding slave rotating shaft 270 close to the driving gear 240, each slave rotating shaft 270 is rotatably connected to one side of the first rotating disk 110 close to the driving gear 240, the main rotating shaft 230 is parallel to the slave rotating shaft 270, and the central axis of the inner gear ring 250 is colinear with the main rotating shaft 230;

[0034] The kneading paddle assembly 300 includes a central kneading paddle 310 and n peripheral kneading paddles 320. The central kneading paddle 310 is coaxially fixedly connected to one end of the main shaft 230 away from the driving gear 240. Driven by the motor 210, the central kneading paddle 310 rotates synchronously with the main shaft 230. Each peripheral kneading paddle 320 is coaxially fixedly connected to one end of each corresponding slave shaft 270 away from the driven gear 260. Each peripheral kneading paddle 320 surrounds the central kneading paddle 310 respectively. The peripheral kneading paddles 320 have the same shape as the central kneading paddle 310, so that the central kneading paddle 310 cooperates with each peripheral kneading paddle 320 to achieve kneading processing on the raw materials.

[0035] The working process of the kneading machine for preparing elastic plastics in the embodiment of the utility model is as follows: the raw materials for preparing elastic plastics are put into the kneading tank 100 according to the formula, the motor 210 drives the main rotating shaft 230 to rotate through the linkage mechanism 220, the driving gear 240 rotates following the main rotating shaft 230, and under the cooperation of the driving gear 240 and the inner gear ring 250, the driven gear 260 rotates synchronously, and the driven gear 260 and the slave rotating shaft 270 rotate around the axis of the slave rotating shaft 270, and the driven gear 260 also rotates around the axis of the slave rotating shaft 270. The driving gear 240 rotates around, and the first turntable 110 is driven to rotate around the main rotating shaft 230 by the slave rotating shaft 270. The central kneading paddle 310 rotates around the axis of the main rotating shaft 230, and the peripheral kneading paddle 320 rotates around the axis of the slave rotating shaft 270. The peripheral kneading paddle 320 also rotates around the central kneading paddle 310. The peripheral kneading paddle 320 with the same shape can cooperate with the central kneading paddle 310 to knead the raw materials in various areas in the kneading tank 100, and the kneading effect is uniform and reliable.

[0036] The motor 210 drives the main rotating shaft 230 to rotate, thereby driving the kneading and driving gear 240 and the driven gear 260 of the inner gear ring 250 to rotate synchronously. While driving the central kneading paddle 310 to rotate around the axis of the main rotating shaft 230, it can also drive at least two peripheral kneading paddles 320 to rotate around the axis of the secondary rotating shaft 270 and rotate around the central kneading paddle 310. The peripheral kneading paddles 320 and the central kneading paddle 310 are arranged in the same shape. The peripheral kneading paddles 320 can cooperate with the central kneading paddle 310 to form a comprehensive and reliable shear force and friction force on different areas in the kneading tank body 100. Kneading in multi-dimensional space can not only effectively improve the uniformity of kneading and stirring, thereby improving the effect of kneading processing and further improving the quality of the prepared elastic plastic, but also effectively improve the kneading efficiency, thereby improving the preparation efficiency of the elastic plastic and effectively reducing the preparation energy consumption; the driving component 200 is provided with a motor 210 as a power source, which can effectively simplify the structure of the driving component 200 and reduce the production cost of the machine. The overall structure is compact and reliable, and occupies a small area, which can effectively reduce the use cost and maintenance cost. The kneading process can be adjusted and controlled by controlling the rotation speed of the motor 210, and the operation is convenient.

[0037] It can be understood that the central kneading paddle 310 is provided with a central blade 311 spirally arranged around the straight line where the main rotating shaft 230 is located, and the peripheral kneading paddle 320 is provided with a peripheral blade 321 spirally arranged around the corresponding straight line where the secondary rotating shaft 270 is located. The spiral winding direction of the central blade 311 is opposite to the spiral winding direction of the peripheral blade 321, which can improve the shear force formed between the central blade 311 and the peripheral blade 321 during the kneading process, and can effectively improve the uniformity of kneading and stirring, thereby effectively improving the quality of the prepared elastic plastic.

[0038] It can be understood that the transmission ratio between the driving gear 240 and the driven gear 260 is greater than or less than 1, that is, the transmission ratio between the driving gear 240 and the driven gear 260 is not equal to 1, which can make the rotation speed of the driven gear 260 different from the rotation speed of the driving gear 240, so that the central kneading paddle 310 and the peripheral kneading paddle 320 rotate at different speeds, which can achieve disordered kneading and stirring between the central kneading paddle 310 and the peripheral kneading paddle 320, can effectively improve the uniformity of kneading and stirring, and can effectively improve the kneading preparation effect.

[0039] It can be understood that the linkage mechanism 220 includes a worm wheel 221 and a worm 222, the worm 222 is fixedly connected to the driving end of the motor 210, the worm wheel 221 is coaxially fixedly connected to the main shaft 230, the worm wheel 221 is meshingly connected with the worm 222, and the motor 210 drives the worm wheel 221 to rotate through the worm 222, which can effectively increase the torque that the motor 210 can bear, thereby increasing the kneading torsional force of the central kneading paddle 310 and the peripheral kneading paddle 320. The kneading machine of the utility model has a wide range of applications, a long service life, and a stable and reliable structure.

[0040] Specifically, the linkage mechanism 220 may be configured as other connection structures such as a coupling, in addition to being configured as a worm wheel 221 and a worm 222 .

[0041] It can be understood that a second rotating disk 120 parallel to and coaxial with the first rotating disk 110 is also rotatably connected in the kneading tank 100. The first rotating disk 110 and the second rotating disk 120 are arranged in parallel on opposite sides of the kneading paddle assembly 300. The end of the central kneading paddle 310 close to the second rotating disk 120 is provided with a central auxiliary shaft 312 coaxial with the main rotating shaft 230. The end of each peripheral kneading paddle 320 away from the second rotating disk 120 is provided with a peripheral auxiliary shaft 322 coaxial with the corresponding slave rotating shaft 270. The central auxiliary shaft 312 and the peripheral auxiliary shaft 322 are both rotatably connected to the second rotating disk 120. The central auxiliary shaft 312 is rotatably connected to the center of the second rotating disk 120, and the peripheral auxiliary shaft 322 is rotatably connected to the edge area of ​​the second rotating disk 120.

[0042] By providing the second turntable 120 in conjunction with the central auxiliary shaft 312 and the peripheral auxiliary shaft 322, the forces at both ends of the central kneading paddle 310 and the peripheral kneading paddle 320 can be effectively balanced, thereby effectively improving the stability of the overall operation of the kneading paddle assembly 300, effectively improving the reliability of the kneading action, effectively extending the service life of the kneading machine, and improving the effect of the kneading process.

[0043] It can be understood that the drive assembly 200 also includes a first sealed bearing 281, a second sealed bearing 282, n third sealed bearings 283 and n fourth sealed bearings 284, and the main shaft 230 is rotatably connected to the first turntable 110 through the first sealed bearing 281, that is, the inner ring and the outer ring of the first sealed bearing 281 are respectively connected to the main shaft 230 and the first turntable 110, so that the main shaft 230 can rotate relative to the first turntable 110, and at the same time, the sealing performance of the connection area between the main shaft 230 and the first turntable 110 can be ensured, and each central auxiliary shaft 312 is rotatably connected to the second turntable 120 through the second sealed bearing 282, that is, the inner ring and the outer ring of the second sealed bearing 282 are respectively connected to the central auxiliary shaft 312 and the second turntable 120, so that the central auxiliary shaft 312 can rotate relative to the second turntable 120, and at the same time, the central auxiliary shaft 312 can rotate relative to the second turntable 120. The sealing performance of the connection area between the auxiliary shaft 312 and the second turntable 120; each slave shaft 270 is rotatably connected to the first turntable 110 through the corresponding third sealing bearing 283, that is, the inner ring and the outer ring of the third sealing bearing 283 are respectively connected to the slave shaft 270 and the second turntable 120, so that the slave shaft 270 can rotate relative to the first turntable 110, and at the same time, the sealing performance of the connection area between the slave shaft 270 and the first turntable 110 can be ensured, and each peripheral auxiliary shaft 322 is rotatably connected to the second turntable 120 through the corresponding fourth sealing bearing 284, that is, the inner ring and the outer ring of the fourth sealing bearing 284 are respectively connected to the peripheral auxiliary shaft 322 and the second turntable 120, so that the peripheral auxiliary shaft 322 can rotate relative to the second turntable 120, and at the same time, the sealing performance of the connection area between the peripheral auxiliary shaft 322 and the second turntable 120 can be ensured.

[0044] Specifically, the first rotating disk 110 and the kneading tank body 100, as well as the second rotating disk 120 and the kneading tank body 100 are connected via sealed bearings, which can effectively improve the reliability of the kneading processing action of the kneading machine.

[0045] It can be understood that n=2, and the two peripheral kneading paddles 320 are located on opposite sides of the central kneading paddle 310. By providing two peripheral kneading paddles 320 located on opposite sides of the central kneading paddle 310, the uniformity of the kneading and stirring process can be effectively improved.

[0046] It can be understood that the outer wall of the kneading tank body 100 is covered with a heat-insulating layer 130 , and the heat-insulating layer 130 can be provided as an asbestos layer. By providing the heat-insulating layer 130 , the effect of the kneading process in the kneading tank body 100 can be effectively improved.

[0047] According to actual application requirements, a heating wire and a temperature sensor may be further provided between the kneading tank body 100 and the insulation layer 130. The temperature of the kneading tank body 100 is detected by the temperature sensor, thereby controlling the operation of the heating wire, which can effectively improve the controllability of the kneading process.

[0048] Specifically, the top and bottom of the kneading tank 100 may be respectively provided with a feeding port and a discharging port, which are used to connect to the corresponding feeding mechanism and discharging mechanism respectively.

[0049] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A kneading machine for preparing elastic plastics, characterized in that: The invention comprises a kneading tank body (100), a driving assembly (200) and a kneading paddle assembly (300), wherein the driving assembly (200) is arranged outside the kneading tank body (100), the kneading paddle assembly (300) is arranged inside the kneading tank body (100), and a first rotating disk (110) is rotatably connected inside the kneading tank body (100); The driving assembly (200) comprises a motor (210), a linkage mechanism (220), a main rotating shaft (230), a driving gear (240), an internal gear ring (250), n driven gears (260) and n slave rotating shafts (270), wherein n is an integer greater than 1, the main rotating shaft (230) is rotatably connected to the kneading tank (100), the main rotating shaft (230) and the axis of the first rotating disk (110) are colinear, the linkage mechanism (220) connects the motor (210) and the main rotating shaft (230), and the The motor (210) is used to drive the main rotating shaft (230) to rotate, the driving gear (240) is connected to the main rotating shaft (230), the inner gear ring (250) is connected to the kneading tank (100), the opposite sides of each driven gear (260) are respectively meshed and connected with the driving gear (240) and the inner gear ring (250), each driven gear (260) is respectively connected to each of the slave rotating shafts (270), and each of the slave rotating shafts (270) is rotatably connected to the first rotating disk (110); The kneading paddle assembly (300) comprises a central kneading paddle (310) and n peripheral kneading paddles (320), wherein the central kneading paddle (310) is connected to the main rotating shaft (230), and each of the peripheral kneading paddles (320) is connected to each of the secondary rotating shafts (270). The peripheral kneading paddles (320) surround the central kneading paddle (310), and the peripheral kneading paddles (320) have the same shape as the central kneading paddle (310), so that the central kneading paddle (310) cooperates with each of the peripheral kneading paddles (320) to achieve kneading of the raw materials.

2. A kneading machine for preparing elastic plastics according to claim 1, characterized in that: The central kneading paddle (310) is provided with a central blade (311) which is spirally arranged around the straight line where the main rotating shaft (230) is located, and the peripheral kneading paddle (320) is provided with a peripheral blade (321) which is spirally arranged around the straight line where the secondary rotating shaft (270) is located, and the spiral winding directions of the central blade (311) and the peripheral blade (321) are opposite.

3. A kneading machine for preparing elastic plastics according to claim 2, characterized in that: The transmission ratio between the driving gear (240) and the driven gear (260) is greater than or less than 1.

4. A kneading machine for preparing elastic plastics according to claim 1, characterized in that: The linkage mechanism (220) comprises a worm wheel (221) and a worm (222); the worm (222) is connected to the motor (210); the worm wheel (221) is connected to the main shaft (230); and the worm wheel (221) is meshingly connected to the worm (222).

5. A kneading machine for preparing elastic plastics according to claim 1, characterized in that: A second rotating disk 1 (20) is rotatably connected in the kneading tank (100); the first rotating disk (110) and the second rotating disk (120) are arranged in parallel on opposite sides of the kneading paddle assembly (300); a central auxiliary shaft (312) coaxial with the main rotating shaft (230) is provided at one end of the central kneading paddle (310) close to the second rotating disk (120); a peripheral auxiliary shaft (322) coaxial with the slave rotating shaft (270) is provided at one end of the peripheral kneading paddle (320) away from the second rotating disk (120); and both the central auxiliary shaft (312) and the peripheral auxiliary shaft (322) are rotatably connected to the second rotating disk (120).

6. A kneading machine for preparing elastic plastics according to claim 5, characterized in that: The driving assembly (200) further comprises a first sealed bearing (281), a second sealed bearing (282), n third sealed bearings (283) and n fourth sealed bearings (284); the main rotating shaft (230) is rotationally connected to the first rotating disk (110) via the first sealed bearing (281); each of the central auxiliary shafts (312) is rotationally connected to the second rotating disk (120) via the second sealed bearing (282); each of the slave rotating shafts (270) is rotationally connected to the first rotating disk (110) via the corresponding third sealed bearing (283); each of the peripheral auxiliary shafts (322) is rotationally connected to the second rotating disk (120) via the corresponding fourth sealed bearing (284).

7. A kneading machine for preparing elastic plastics according to claim 6, characterized in that: n=2, the two peripheral kneading paddles (320) are located on opposite sides of the central kneading paddle (310).

8. A kneading machine for preparing elastic plastics according to claim 1, characterized in that: The outer wall of the kneading tank (100) is covered with a heat-insulating layer (130).

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