A planetary screw extruder for rubber mixing

Abstract

The application belongs to the technical field of rubber mixing, in particular to a planetary screw extruder for rubber mixing, which comprises a cylinder, a discharging box is arranged outside the cylinder, a feeding hopper is fixedly installed on the top of the cylinder, the feeding hopper is communicated with the discharging box, a rotating seat is rotatably installed on the inner wall of the discharging box, a plurality of accommodating cavities are uniformly arranged on the inner wall of the rotating seat, the accommodating cavities are circularly arranged, and a feeding port is arranged on the outer wall of the discharging box. The rotating assembly drives the rotating seat to gradually and intermittently rotate, each accommodating cavity is sequentially aligned with the feeding port and the feeding opening, one feeding is completed every time the rotating assembly rotates one station, the feeding amount is determined by the set single feeding amount, and the feeding time interval is determined by the rotating speed, so that the accurate ration and accurate timing of the raw material supply in the cylinder are realized, and the problem of the unstable flow of the raw material supply in the traditional manual feeding or continuous feeding mode is fundamentally solved.

Description

Technical Field

[0001] This invention belongs to the field of rubber compounding technology, specifically a planetary screw extruder for rubber compounding. Background Technology

[0002] Rubber compounding is a key process in the production of rubber products. Its purpose is to uniformly mix raw rubber with various compounding agents (such as carbon black, sulfur, accelerators, softeners, etc.) under the action of mechanical force and heat to form a compound with good processing performance. In the rubber compounding production process, the planetary screw extruder is one of the core pieces of equipment. The stability and quantitative accuracy of its feeding system directly affect the quality consistency and production efficiency of rubber compounding. At present, the feeding structure of existing planetary screw extruders for rubber compounding generally adopts a single fixed feed hopper design. This feed hopper is directly set above the barrel feed inlet. After the operator mixes the various raw materials required for rubber compounding, it is directly poured into this single fixed feed hopper. The raw materials fall into the barrel through the feed hopper for compounding.

[0003] However, this feeding method relies entirely on the operator's experience to estimate the frequency of raw material input, making it difficult to achieve precise timing and resulting in inconsistent raw material supply. When too much raw material is input, it can cause blockage at the extruder inlet, increasing the equipment's operating load. Excessive raw material can also accumulate in the mixing chamber, leading to insufficient and uneven mixing, failing to meet production requirements. Conversely, when too little raw material is input, insufficient material in the mixing chamber can cause the planetary screw to idle, wasting energy and causing unstable temperature and pressure during mixing. This negatively impacts the plasticizing effect and mechanical properties of the compound, leading to product quality fluctuations. Furthermore, the inconsistent raw material input disrupts the continuity and standardization of the entire mixing process, resulting in inconsistent quality between different batches of compound, hindering large-scale and standardized production, and increasing production losses and the rate of defective products.

[0004] Therefore, the present invention provides a planetary screw extruder for rubber compounding. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: A planetary screw extruder for rubber compounding, comprising a barrel, a feeding box sleeved on the outer side of the barrel, a feed hopper fixedly installed on the top of the barrel, the feed hopper being connected to the feeding box, a rotating seat rotatably mounted on the inner wall of the feeding box, a plurality of receiving cavities evenly opened on the inner wall of the rotating seat, the receiving cavities being circular, a feed inlet opened on the outer wall of the feeding box, and a feeding port opened on the inner wall of the feeding box, wherein two receiving cavities are respectively connected to the feed inlet and the feeding port, a rotating assembly is provided on one side of the feeding box, the rotating assembly being used to drive the rotating seat to rotate, and a compounding assembly is provided on the inner side of the barrel.

[0007] Preferably, the rotating assembly includes a feeding motor located on one side of the feeding box. The output shaft of the feeding motor is fixedly mounted with a driving wheel, and a driven wheel is fixedly mounted on one side of the rotating seat. A transmission belt is installed between the driven wheel and the driving wheel.

[0008] Preferably, the inner wall of the rotating seat is provided with a stirring assembly for stirring the raw materials inside the receiving cavity, and the inner wall of the rotating seat is provided with a vibration assembly for driving the rotating seat to vibrate and promote the feeding operation.

[0009] Preferably, the stirring assembly includes stirring shafts, and several stirring shafts are provided and rotatably installed on the inner wall of the receiving cavity. Several sets of connecting rods are fixedly installed on the outer wall of the receiving cavity, and a stirring rod is fixedly installed between each set of connecting rods. A transmission assembly is provided on the outer wall of the feeding box.

[0010] Preferably, the transmission assembly includes a positioning gear ring, which is fixedly installed on the outer wall of the feeding box. A rotating gear is fixedly installed at one end of each stirring shaft. The rotating gear is located on the outside of the rotating seat, and the teeth of the rotating gear mesh with the teeth of the positioning gear ring.

[0011] Preferably, the vibration assembly includes low-friction wear-resistant linings, and multiple low-friction wear-resistant linings are uniformly fixedly installed on the inner wall of the rotating seat. Each low-friction wear-resistant lining has a buffer rubber pad symmetrically fixedly installed on its inner wall, and each low-friction wear-resistant lining has a rubber impact ball on its inner side.

[0012] Preferably, a mounting base is fixedly installed on the outer wall of the feed hopper, a hinge seat is fixedly installed on the outer wall of the mounting base, a swing rod is rotatably installed on the inner wall of the hinge seat, a rubber striking ball is fixedly installed at one end of the swing rod, a buffer rubber pad is fixedly installed on the outer wall of the feed hopper, the buffer rubber pad is fitted with the rubber striking ball, and a swing assembly is provided on the inner side of the driven wheel.

[0013] Preferably, the oscillating assembly includes a mounting ring, which is fixedly mounted on the inner wall of the driven wheel. A plurality of connecting plates are fixedly mounted on the inner wall of the mounting ring, and a compression rod is fixedly mounted on the inner wall of each connecting plate. A force-bearing rod is fixedly mounted on the outer wall of the rubber striking ball.

[0014] Preferably, the mixing assembly includes a planetary screw structure, which is disposed inside the barrel. A mixing motor is disposed on one side of the feeding box, and the output shaft of the mixing motor is connected to the planetary screw structure for transmission. A control box is disposed on one side of the mixing motor, and a feeding hopper is fixedly installed on the outer wall of the feeding box.

[0015] Preferably, a base is provided below the barrel, several brackets are fixedly installed on the outer wall of the barrel, and several fixed platforms are fixedly installed on the top of the base. The feeding box, feeding motor, mixing motor, control box and brackets are respectively fixedly installed on the top of the corresponding fixed platforms.

[0016] The beneficial effects of this invention are as follows: 1. The rotating component drives the rotating seat to rotate gradually and intermittently. Each receiving cavity is aligned with the feed port and the feeding port in sequence. Each rotation of one station completes one feeding. The feeding amount is determined by the set single feeding amount, and the feeding time interval is determined by the rotation speed. This achieves precise quantitative and precise timing of the raw material supply in the barrel, fundamentally solving the problems of inconsistent raw material supply and unstable flow in traditional manual or continuous feeding methods, and ensuring the consistency of the proportion of each component during the mixing process.

[0017] 2. By adjusting the rotation speed of the rotating component, the feeding frequency can be flexibly controlled, matching the feeding rhythm with the mixing speed of the planetary screw inside the barrel. This avoids the problems of material accumulation in the barrel due to excessive feeding or reduced mixing efficiency due to excessively slow feeding. The receiving cavity is circular with an arc-shaped inner side. When the receiving cavity rotates to the top, the circular cavity facilitates the complete sliding out of the raw material under gravity, making it less likely for material to remain in the cavity. This ensures the accuracy of each feeding amount and also avoids cross-contamination of the next feeding by residual material.

[0018] 3. By setting up the stirring components, active stirring is superimposed on the passive premixing of raw materials by the tumbling motion of the rotating seat. The two mixing mechanisms complement each other and work synergistically to make the raw materials of different components more fully contacted and more evenly dispersed, which significantly improves the uniformity of premixing and lays an excellent material foundation for subsequent planetary screw mixing in the barrel. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective; Figure 3 This is a schematic diagram of the structure of the barrel of the present invention; Figure 4 This is a schematic diagram of the structure of the feeding motor of the present invention; Figure 5 This is a schematic diagram of the structure of the feeding box of the present invention; Figure 6 This is a cross-sectional view of the rotating seat structure of the present invention; Figure 7 This is a schematic diagram of the rotating seat structure of the present invention; Figure 8 This is a schematic diagram of the feeding box structure of the present invention; Figure 9 This is a cross-sectional view of the rotating seat and low-friction wear-resistant liner structure of the present invention; Figure 10 This is a cross-sectional view of the low-friction wear-resistant liner structure of the present invention; Figure 11 This is a schematic diagram of the structure of the feed hopper of the present invention; Figure 12 This is a schematic diagram of the mounting ring structure of the present invention.

[0021] In the diagram: 1. Barrel; 2. Feeding box; 3. Feed hopper; 4. Rotating seat; 5. Receiving cavity; 6. Feed inlet; 7. Feeding port; 8. Feeding motor; 9. Driving wheel; 10. Driven wheel; 11. Transmission belt; 12. Agitator shaft; 13. Connecting rod; 14. Agitator rod; 15. Positioning gear ring; 16. Rotating gear; 17. Low-friction wear-resistant liner; 18. Buffer rubber pad; 19. Rubber impact ball; 20. Mounting seat; 21. Hinge seat; 22. Swing rod; 23. Rubber impact ball; 24. Buffer rubber pad; 25. Mounting ring; 26. Connecting plate; 27. Extrusion rod; 271. Force rod; 28. Mixing motor; 29. ​​Control box; 30. Feeding hopper; 31. Base; 32. Bracket; 33. Fixed platform. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] like Figures 1 to 9As shown in the embodiment of the present invention, a planetary screw extruder for rubber compounding includes a barrel 1, a feeding box 2 sleeved on the outer side of the barrel 1, a feed hopper 3 fixedly installed on the top of the barrel 1, the feed hopper 3 being connected to the feeding box 2, a rotating seat 4 rotatably mounted on the inner wall of the feeding box 2, a plurality of receiving cavities 5 evenly opened on the inner wall of the rotating seat 4, the receiving cavities 5 being circularly arranged, a feed inlet 6 opened on the outer wall of the feeding box 2, and a feeding port 7 opened on the inner wall of the feeding box 2, wherein two receiving cavities 5 are respectively connected to the feed inlet 6 and the feeding port 7, and a rotating assembly is provided on one side of the feeding box 2. The rotating assembly is used to drive the rotating seat 4 to rotate. A mixing component is installed inside the barrel 1. During rubber mixing, the rotating assembly drives the rotating seat 4 to rotate gradually and intermittently. As the rotating seat 4 rotates, each receiving cavity 5 aligns sequentially with the feed inlet 6 and the feeding port 7. When the receiving cavities 5 are aligned with the feed inlet 6, the pre-mixed raw materials can be quantitatively fed into each receiving cavity 5 through the feed inlet 6. When each receiving cavity 5 rotates until the top of the barrel 1 aligns with the feeding port 7, the raw materials inside the receiving cavities 5 fall under gravity, passing through the feeding port 7. Raw materials enter the barrel 1 through the feed hopper 3. After entering the barrel 1, the mixing component mixes and extrudes the raw materials, realizing rubber production. In summary, the rotating component drives the rotating seat 4 to rotate gradually and intermittently. Each receiving cavity 5 is aligned with the feed port 6 and the feeding port 7 in sequence. Each rotation of one station completes one feeding. The feeding amount is determined by the set single feeding amount, and the feeding time interval is determined by the rotation speed. This achieves precise quantitative and precise timing of the raw material supply in the barrel 1, fundamentally solving the problems of inconsistent raw material supply and unstable flow rate in traditional manual or continuous feeding methods. The design ensures the consistency of the proportions of each component during the mixing process. By adjusting the rotation speed of the rotating component, the feeding frequency can be flexibly controlled, matching the feeding rhythm with the mixing speed of the planetary screw in the barrel 1. This avoids the problems of material accumulation in the barrel 1 due to feeding too quickly or reduced mixing efficiency due to feeding too slowly. The receiving cavity 5 is circular with an arc-shaped inner side. When the receiving cavity 5 rotates to the top, the circular cavity facilitates the complete sliding out of the raw materials under the action of gravity, making it difficult for material to remain in the cavity. This ensures the accuracy of the feeding amount each time and also avoids cross-contamination of the next feeding by the residual material.

[0024] like Figures 2 to 4As shown, the rotating assembly includes a feeding motor 8, located on one side of the feeding box 2. A drive wheel 9 is fixedly mounted on the output shaft of the feeding motor 8, and a driven wheel 10 is fixedly mounted on one side of the rotating seat 4. A transmission belt 11 connects the driven wheel 10 and the drive wheel 9. When the feeding motor 8 is started, it drives the drive wheel 9 to rotate. The drive wheel 9, in turn, drives the driven wheel 10 to rotate via the transmission belt 11. The driven wheel 10, in turn, drives the rotating seat 4 to rotate, thus providing power for the device's operation. The feeding motor 8 causes the rotating seat 4 to rotate, and multiple receiving cavities 5 are evenly distributed on the rotating seat 4. When one receiving cavity... 5. When unloading from the top, another receiving cavity 5 is at the feed inlet 6 for supplementary feeding. Each receiving cavity 5 works alternately, achieving a near-continuous feeding effect, eliminating the intermittent pauses when feeding from a single cavity, improving mixing efficiency and equipment utilization. When the rotating seat 4 rotates, the raw materials in the receiving cavity 5 move and flip with the cavity. Utilizing the alternating changes in gravity during the rotation process, the raw materials continuously roll and shift within the cavity. The raw materials of different components fully contact and mix during the flipping process, achieving passive premixing without additional power. The circular receiving cavity 5 is less prone to dead corners and material residue, improving the uniformity of premixing and the cavity emptying rate.

[0025] like Figures 4 to 6 and Figures 9 to 10 As shown, the inner wall of the rotating seat 4 is equipped with a stirring assembly, which is used to stir the raw materials inside the receiving cavity 5. The inner wall of the rotating seat 4 is also equipped with a vibration assembly, which is used to drive the rotating seat 4 to vibrate and promote the feeding process. When the rotating seat 4 rotates, the stirring assembly stirs the raw materials in the receiving cavity 5. By setting the stirring assembly, an active stirring effect is superimposed on the passive premixing of the raw materials by the tumbling motion of the rotating seat 4. The two mixing mechanisms complement each other and work synergistically to make the raw materials of different components more fully contacted and more evenly dispersed, which significantly improves the uniformity of premixing and lays an excellent material foundation for the subsequent planetary screw mixing in the barrel 1. Some components in rubber raw materials are prone to caking after being exposed to moisture or left to stand. Clumping not only affects the uniformity of mixing but may also clog the feeding port 7. By stirring the raw materials with the stirring component, clumping can be effectively prevented, keeping the raw materials in a loose and flowing state. This prevents clumping from the source and ensures that the raw materials fed into the receiving cavity 5 can be smoothly transferred and unloaded each time. When each receiving cavity 5 reaches the top for unloading, the rotating seat 4 will rotate back and forth slightly. When the rotating seat 4 rotates back and forth slightly, the vibration component will cause the rotating seat 4 to vibrate. The vibration energy is transferred to the material in the receiving cavity 5, causing the adhesion between the material and the cavity wall to be repeatedly broken and rebuilt. Under the action of vibration, the material continuously detaches from the cavity wall, thereby achieving complete emptying of the material in the receiving cavity 5 and minimizing residue.

[0026] like Figure 6 and Figure 9 As shown, the stirring assembly includes stirring shafts 12, which are arranged in several groups and rotatably mounted on the inner wall of the receiving cavity 5. Several sets of connecting rods 13 are fixedly mounted on the outer wall of the receiving cavity 5, and stirring rods 14 are fixedly mounted between each set of connecting rods 13. A transmission assembly is provided on the outer wall of the feeding box 2. When the rotating seat 4 rotates, it drives the stirring shafts 12 to rotate. While the stirring shafts 12 rotate with the rotating seat 4, the transmission assembly causes them to rotate on their own axis. During this rotation, the stirring shafts 12 drive the stirring rods 14 to rotate via the connecting rods 13. The stirring rods 14 enter the receiving cavity 5. The rotation of the cylinder stirs the raw materials in the chamber, thereby improving the mixing effect. Rubber compounding raw materials are diverse and have large density differences. By combining tumbling and stirring, the stratification trend between raw materials of different densities and particle sizes is effectively broken, allowing heavy and light components to fully blend. This fundamentally solves the common problem of uneven dispersion in rubber formulations. Stirring prevents the raw materials from clumping, ensuring that the raw materials exist in the form of individual particles or small agglomerates. This ensures that the proportion of each component in each chamber is always consistent with the design formula, further improving the accuracy of formula execution.

[0027] like Figures 4 to 5 As shown, the transmission assembly includes a positioning gear ring 15, which is fixedly installed on the outer wall of the feeding box 2. A rotating gear 16 is fixedly installed at one end of each stirring shaft 12. The rotating gear 16 is located on the outside of the rotating seat 4, and the teeth of the rotating gear 16 mesh with the teeth of the positioning gear ring 15. A rotating gear 16 is provided at the end of each stirring shaft 12, and each rotating gear 16 meshes with the positioning gear ring 15. When the stirring shaft 12 rotates with the rotating seat 4, the stirring shaft 12 will drive the rotating gear 16 to rotate. When the rotating gear 16 rotates, it will rotate under the action of the positioning gear ring 15, thereby driving the stirring shaft 12 to rotate, providing power for the stirring rod 14 to stir the raw materials.

[0028] like Figure 6 and Figures 9 to 10As shown, the vibration assembly includes low-friction wear-resistant linings 17. Multiple low-friction wear-resistant linings 17 are evenly and uniformly fixed to the inner wall of the rotating seat 4. Each low-friction wear-resistant lining 17 has a symmetrically fixed buffer rubber pad 18 on its inner wall, and each low-friction wear-resistant lining 17 has a rubber impact ball 19 on its inner side. When one of the receiving cavities 5 rotates to the top for feeding, the rotating seat 4 will reciprocate slightly. During this reciprocating rotation, the two low-friction wear-resistant linings 17 on both sides change angle, causing the rubber impact balls 19 on their inner sides to slide back and forth from one end to the other under the influence of gravity. When the rubber impact ball 19 slides from one end of the low-friction wear-resistant lining 17 to the other, it will impact the buffer rubber pad 18. The vibration generated by the impact of the striking ball 19 and the buffer rubber pad 18 is transmitted to the raw material through the rotating seat 4, causing the raw material to detach from the inner wall of the receiving cavity 5 through vibration, thereby emptying the raw material in the receiving cavity 5 and preventing raw material residue. The low-friction wear-resistant liner 17 can reduce the sliding resistance of the rubber impact ball 19, ensuring that the ball can roll smoothly when the rotating seat 4 rotates without jamming, and the impact is reliable. The setting of the buffer rubber pad 18 makes the rubber impact ball 19 make a soft impact with it, with sufficient vibration, no hard impact, and low noise. The impact causes the rubber impact ball 19 to bounce back slightly, bouncing back and forth several times on the inner side of the liner. It is equivalent to one sliding triggering multiple impacts, with a longer vibration duration and more impacts, which greatly enhances the vibration and drainage effect on the material. It is especially suitable for the complete drainage of rubber raw materials with high viscosity and easy to stick to the wall.

[0029] like Figures 11 to 12As shown, a mounting base 20 is fixedly installed on the outer wall of the feed hopper 3, and a hinged base 21 is fixedly installed on the outer wall of the mounting base 20. A swing rod 22 is rotatably installed on the inner wall of the hinged base 21, and a rubber striking ball 23 is fixedly installed at one end of the swing rod 22. A buffer rubber pad 24 is fixedly installed on the outer wall of the feed hopper 3, and the buffer rubber pad 24 is fitted with the rubber striking ball 23. A swing assembly is provided on the inner side of the driven wheel 10. When the rotating seat 4 rotates, it will drive the swing assembly to rotate. When the swing assembly rotates, it will cyclically push the rubber striking ball 23. 3. The component swings away from the buffer rubber pad 24. When the swing assembly stops applying force to the rubber striking ball 23 as it rotates, the rubber striking ball 23 will swing back to its original position under the action of rotation. When the rubber striking ball 23 returns to its original position, it will strike the buffer rubber pad 24, thereby generating vibration. The vibration will be transmitted to the feed hopper 3 and the raw material inside it through the buffer rubber pad 24. The vibration promotes the raw material to enter the machine barrel 1 through the feed hopper 3, avoids the raw material from adhering to the inner wall of the feed hopper 3, and at the same time prevents the raw material from getting stuck inside the feed hopper 3. In summary... The vibration generated by the rubber striking ball 23 striking the buffer rubber pad 24 is transmitted to the feed hopper 3. The wall of the feed hopper 3 experiences high-frequency, low-amplitude vibrations. This vibrational energy is transferred to the material on the inner wall of the feed hopper 3, repeatedly breaking down the adhesion and static friction between the material and the inner wall. Under the vibration, the material continuously detaches from the inner wall, fundamentally preventing the formation of a hanging layer on the inner wall of the feed hopper 3. The feed hopper 3 is the key channel connecting the discharge box 2 and the machine barrel 1. Material falls into the feed hopper 3 from the feeding port 7 and then enters the machine barrel 1. When the material... When the particle size is uneven or the moisture content is high, bridging is easily formed at the constriction of the feed hopper 3. The vibration generated by the rubber striking ball 23 causes the bridging structure to be constantly disturbed and destroyed. Under the dual action of gravity and vibration, the material flows into the barrel 1 continuously and stably, completely eliminating the problem of bridging and blockage in the feed hopper. At the same time, the vibration keeps the material in the feed hopper 3 in a state of slight movement. The material will not accumulate at any position to the extent that it can cause jamming. This ensures that the entire feeding channel from the discharge box 2 to the barrel 1 is unobstructed and the continuity of feeding is fundamentally guaranteed.

[0030] like Figure 4 and Figure 12As shown, the swing assembly includes a mounting ring 25, which is fixedly mounted on the inner wall of the driven wheel 10. Several connecting plates 26 are fixedly mounted on the inner wall of the mounting ring 25. Each connecting plate 26 has a pressing rod 27 fixedly mounted on its inner wall. A force-bearing rod 271 is fixedly mounted on the outer wall of the rubber striking ball 23. When the driven wheel 10 rotates, it drives the mounting ring 25 to rotate. When the mounting ring 25 rotates, it drives each pressing rod 27 to rotate through the connecting plates 26. When the pressing rod 27 rotates, it pushes the force-bearing rod 271 in sequence, thereby causing the rubber striking ball 23 to swing. When the pressing rod 27 disengages from the force-bearing rod 271, the rubber striking ball 23 will reset under the action of gravity and then collide with the buffer rubber pad 24 to generate vibration.

[0031] like Figures 1 to 2 As shown, the mixing assembly includes a planetary screw structure, which is located inside the barrel 1. A mixing motor 28 is located on one side of the feeding box 2, and the output shaft of the mixing motor 28 is connected to the planetary screw structure. A control box 29 is located on one side of the mixing motor 28, and a feeding hopper 30 is fixedly installed on the outer wall of the feeding box 2. After the raw material enters the barrel 1, the mixing motor 28 drives the planetary screw structure to operate. The planetary screw structure has multiple helical surfaces and a complex flow channel design. The raw material is subjected to strong extrusion, shearing, stretching and mixing between the screw and the barrel 1 to achieve rubber mixing. The control box 29 can be used to view the equipment operating status and issue corresponding work instructions. The feeding hopper 30 is set to facilitate the addition of raw materials into the receiving cavity 5.

[0032] like Figures 1 to 2 As shown, a base 31 is provided below the barrel 1, and several brackets 32 are fixedly installed on the outer wall of the barrel 1. Several fixed platforms 33 are fixedly installed on the top of the base 31. The feeding box 2, feeding motor 8, mixing motor 28, control box 29 and brackets 32 are respectively fixedly installed on the top of the corresponding fixed platforms 33. The base 31 is located below the barrel 1, and the fixed platforms 33 are fixedly installed on the top of the base 31. The feeding box 2, feeding motor 8, mixing motor 28, control box 29 and brackets 32 are all concentrated on the corresponding fixed platforms 33, forming a unified rigid bearing platform. The installation benchmark of all components is consistent and the force is uniform, avoiding the problems of inconsistent benchmarks and uneven force caused by the scattered installation of various components. The whole machine structure has high rigidity and high stability.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A planetary screw extruder for rubber compounding, comprising a barrel (1), characterized in that: The outer side of the barrel (1) is fitted with a feeding box (2), and the top of the barrel (1) is fixedly installed with a feeding hopper (3). The feeding hopper (3) is connected to the feeding box (2). The inner wall of the feeding box (2) is rotatably installed with a rotating seat (4). The inner wall of the rotating seat (4) is evenly provided with several receiving cavities (5). The receiving cavities (5) are circular. The outer wall of the feeding box (2) is provided with a feeding port (6). The inner wall of the feeding box (2) is provided with a feeding port (7). Two receiving cavities (5) are connected to the feeding port (6) and the feeding port (7) respectively. A rotating assembly is provided on one side of the feeding box (2). The rotating assembly is used to drive the rotating seat (4) to rotate. A mixing assembly is provided on the inner side of the barrel (1).

2. The planetary screw extruder for rubber compounding according to claim 1, characterized in that: The rotating assembly includes a feeding motor (8), which is located on one side of the feeding box (2). The output shaft of the feeding motor (8) is fixedly mounted with a drive wheel (9), and a driven wheel (10) is fixedly mounted on one side of the rotating seat (4). A transmission belt (11) is installed between the driven wheel (10) and the drive wheel (9).

3. The planetary screw extruder for rubber compounding according to claim 1, characterized in that: The inner wall of the rotating seat (4) is provided with a stirring assembly, which is used to stir the raw materials inside the receiving cavity (5). The inner wall of the rotating seat (4) is provided with a vibration assembly, which is used to drive the rotating seat (4) to vibrate and promote the feeding work.

4. The planetary screw extruder for rubber compounding according to claim 3, characterized in that: The stirring assembly includes a stirring shaft (12), which is provided with several and rotatably installed on the inner wall of the receiving cavity (5). Several sets of connecting rods (13) are fixedly installed on the outer wall of the receiving cavity (5). A stirring rod (14) is fixedly installed between each set of connecting rods (13). A transmission assembly is provided on the outer wall of the feeding box (2).

5. A planetary screw extruder for rubber compounding according to claim 4, characterized in that: The transmission assembly includes a positioning gear ring (15), which is fixedly installed on the outer wall of the feeding box (2). A rotating gear (16) is fixedly installed at one end of each stirring shaft (12). The rotating gear (16) is located on the outside of the rotating seat (4), and the teeth of the rotating gear (16) mesh with the teeth of the positioning gear ring (15).

6. A planetary screw extruder for rubber compounding according to claim 3, characterized in that: The vibration assembly includes a low-friction wear-resistant liner (17), which is provided in multiple and uniformly fixedly installed on the inner wall of the rotating seat (4). Each low-friction wear-resistant liner (17) has a buffer rubber pad (18) symmetrically fixedly installed on its inner wall, and each low-friction wear-resistant liner (17) has a rubber impact ball (19) on its inner side.

7. A planetary screw extruder for rubber compounding according to claim 2, characterized in that: The outer wall of the feed hopper (3) is fixedly installed with a mounting base (20), the outer wall of the mounting base (20) is fixedly installed with a hinge base (21), the inner wall of the hinge base (21) is rotatably installed with a swing rod (22), one end of the swing rod (22) is fixedly installed with a rubber striking ball (23), the outer wall of the feed hopper (3) is fixedly installed with a buffer rubber pad (24), the buffer rubber pad (24) is fitted with the rubber striking ball (23), and the inner side of the driven wheel (10) is provided with a swing assembly.

8. A planetary screw extruder for rubber compounding according to claim 7, characterized in that: The swing assembly includes a mounting ring (25), which is fixedly mounted on the inner wall of the driven wheel (10). A plurality of connecting plates (26) are fixedly mounted on the inner wall of the mounting ring (25). A compression rod (27) is fixedly mounted on the inner wall of each connecting plate (26). A force-bearing rod (271) is fixedly mounted on the outer wall of the rubber striking ball (23).

9. A planetary screw extruder for rubber compounding according to claim 2, characterized in that: The mixing assembly includes a planetary screw structure, which is located inside the barrel (1). A mixing motor (28) is provided on one side of the feeding box (2). The output shaft of the mixing motor (28) is connected to the planetary screw structure. A control box (29) is provided on one side of the mixing motor (28). A feeding hopper (30) is fixedly installed on the outer wall of the feeding box (2).

10. A planetary screw extruder for rubber compounding according to claim 9, characterized in that: A base (31) is provided below the barrel (1). Several brackets (32) are fixedly installed on the outer wall of the barrel (1). Several fixed platforms (33) are fixedly installed on the top of the base (31). The feeding box (2), feeding motor (8), mixing motor (28), control box (29) and brackets (32) are respectively fixedly installed on the top of the corresponding fixed platforms (33).

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