Integrated closed feeding anti-blocking device for internal mixer

Abstract

The application belongs to the technical field of internal mixers, and specifically discloses an integrated closed feeding anti-blocking device for an internal mixer, which comprises: a crushing mechanism for preliminarily crushing materials; a preheating mechanism comprising a meshed roller arranged in an inclined and rotating manner; an outer sleeve is arranged outside the meshed roller, and a self-cooling annular cavity is arranged between the meshed roller and the outer sleeve; a heating pipe is arranged at the inner center of the meshed roller; a follow-up stirring mechanism is arranged inside the mixing cavity and reciprocally rotates with the up-and-down movement of an upper ram. Through the synergistic effect of the cooperation of the first crushing to increase the heated surface, the second uniform heating to improve the material fluidity, and the last follow-up stirring to actively break the material arch, the bridging, stagnation and blocking problems of low-temperature hard and large block rubber materials in the feeding link are completely solved, and the smoothness and continuity of the feeding process of the internal mixer are significantly improved.

Description

Technical Field

[0001] This application relates to the field of internal mixer technology, and in particular to an integrated closed feeding and anti-clogging device for internal mixers. Background Technology

[0002] A closed-type rubber mixing mill, also known as an internal mixer, is mainly used for the plasticizing and mixing of rubber. It is a machine with a pair of rotors of a specific shape that rotate relative to each other, which intermittently plasticizes and mixes polymer materials in a closed state with adjustable temperature and pressure. The top of the internal mixer is usually equipped with a hopper for feeding materials into the rubber internal mixer.

[0003] Currently, traditional internal mixers have a single feeding structure with no pre-treatment mechanism. During production, large bags of rubber blocks are often directly fed in. In low-temperature environments, the materials have high hardness and poor flowability, making them prone to bridging, jamming, and blockage at the feeding port and the mixing chamber entrance. At the same time, the existing top bolts only use a vertical, direct-falling, hard extrusion method, which forcibly compacts large, hard materials, easily causing material accumulation and blockage. This further exacerbates the problem of hardening and clumping of materials at low temperatures, frequently leading to shutdowns for clearing blockages.

[0004] Therefore, there is an urgent need to develop an integrated, sealed feeding and anti-clogging device to address the shortcomings of existing technologies. Summary of the Invention

[0005] The purpose of this application is to provide an integrated closed feeding anti-blocking device for internal mixers to solve the above problems.

[0006] To achieve the above objectives, the technical solution of this application is as follows: An integrated closed-loop feeding and anti-clogging device for an internal mixer includes: Crushing mechanism, used for the initial crushing of materials; The preheating mechanism includes an inclined and rotatable feeding mesh roller; an outer sleeve is provided outside the mesh roller, and a self-cooling annular cavity is provided between the mesh roller and the outer sleeve; a heating tube is provided at the center of the inside of the mesh roller; The follow-up stirring mechanism is located inside the mixing chamber and rotates back and forth with the up and down movement of the top bolt.

[0007] Furthermore, the crushing mechanism includes a crushing chamber, inside which two sets of crushing rollers are rotatably arranged. The crushing rollers are circumferentially spaced with crushing teeth, and the crushing teeth on one of the crushing rollers mesh with the outer peripheral wall of the other crushing roller.

[0008] Furthermore, the preheating mechanism also includes a front feeding chamber and a rear feeding chamber, wherein the inlet of the front feeding chamber is connected to the outlet of the crushing chamber; The outlet end face of the front feeding chamber and the inlet end face of the rear feeding chamber are both provided with annular rotating grooves, and the upper and lower ends of the mesh roller are respectively slidably disposed in the annular rotating grooves.

[0009] Furthermore, the outer periphery of the mesh roller is provided with a first pulley, the outer wall of the front discharge chamber is provided with a power motor, the power motor is provided with a power pulley, and the power pulley is connected to the first pulley by a transmission belt. The outer sleeve has an opening for the transmission belt to pass through.

[0010] Furthermore, the outer peripheral wall of the mesh roller is provided with fan blades for generating airflow when the mesh roller rotates.

[0011] Furthermore, the heating tube is provided with an inlet and an outlet water channel inside, and the inlet and outlet water channels are connected at the far inlet end of the heating tube.

[0012] Furthermore, each of the two sets of crushing rollers is equipped with an independent drive motor.

[0013] Furthermore, the mixing chamber is formed through the outer shell, the mixing chamber is located inside the outer shell, the side wall of the outer shell is provided with a feed inlet, and the outlet of the rear discharge chamber is connected to the feed inlet.

[0014] Furthermore, a hydraulic assembly is provided on the top of the outer casing, the telescopic rod of the hydraulic assembly is located in the mixing chamber, and the top bolt is disposed on the telescopic rod; The top bolt has a through hole, and a trigger rod is radially arranged in the through hole. The follow-up stirring mechanism is a stirring column. The top of the stirring column is rotatably connected to the top of the outer shell. The outer peripheral wall of the stirring column has a spiral groove, and the trigger rod is slidably arranged in the spiral groove. The outer peripheral wall of the stirring column also has a spiral mounting groove, and a stirring plate is arranged in the spiral mounting groove.

[0015] Furthermore, when the top plug is at its lowest position, the lower end face of the stirring column is coplanar with the lower bottom face of the top plug.

[0016] The integrated closed feeding and anti-blocking device for internal mixers disclosed in this application completely solves the problems of bridging, jamming and blockage that easily occur in the feeding process of low-temperature hard large rubber materials by first crushing to increase the heating surface, then heating evenly to improve the material flowability, and finally actively breaking the material arching with follow-up stirring. This significantly improves the smoothness and continuity of the feeding process of internal mixers. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2This is a schematic diagram of the crushing and preheating mechanisms in this application; Figure 3 This is a schematic diagram of the crushing mechanism structure in this application; Figure 4 This is a cross-sectional view of the crushing mechanism in this application; Figure 5 This is a top view of the preheating mechanism in this application; Figure 6 for Figure 5 Sectional view of section AA; Figure 7 This is a schematic diagram of the preheating mechanism from another angle. Figure 8 This is another structural diagram of the preheating mechanism in this application; Figure 9 This is a schematic diagram of the main structure of the internal mixer in this application; Figure 10 This is a front view of the main body of the internal mixer in this application; Figure 11 This is a schematic diagram of the main body of the internal mixer in this application from another angle; Figure 12 This is another structural schematic diagram of the main body of the internal mixer in this application; Figure 13 This is a partially enlarged schematic diagram of the follower stirring mechanism in this application; Figure 14 This is a schematic diagram of the top bolt structure in this application.

[0018] In the picture: 1. Crushing mechanism; 10. Crushing roller; 100. Crushing teeth; 11. Drive motor; 2. Preheating mechanism; 20. Front feeding chamber; 21. Outer sleeve; 22. Rear feeding chamber; 23. Mesh drum; 230. Fan blades; 24. Heating tube; 240. Water inlet channel; 241. Water outlet channel; 25. Self-cooling annular cavity; 26. First pulley; 27. Transmission belt; 28. Power motor; 280. Power pulley; 3. Outer shell; 30. Feed inlet; 31. Mixing chamber; 4. Hydraulic components; 40. Telescopic rod; 5. Top bolt; 50. Through hole; 51. Trigger rod; 6. Stirring column; 60. Spiral groove; 61. Spiral mounting groove; 62. Stirring plate. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present application, and therefore only show the components relevant to the present application.

[0020] The integrated closed feeding and anti-blocking device for internal mixers provided in this application has the core working principle of constructing a continuous processing path from crushing, preheating to stirring and agitation, which completely solves the bridging and blockage problem of low-temperature large materials in the feeding process.

[0021] like Figures 1-14 As shown, an integrated closed feeding anti-clogging device for an internal mixer includes: Crushing mechanism 1 is used for preliminary crushing of materials; The preheating mechanism 2 includes an inclined and rotatable feeding mesh roller 23; an outer sleeve 21 is provided on the outside of the mesh roller 23, and a self-cooling annular cavity 25 is provided between the mesh roller 23 and the outer sleeve 21; a heating tube 24 is provided at the center of the inside of the mesh roller 23. The follow-up stirring mechanism is located inside the mixing chamber 31 and rotates back and forth with the up and down movement of the top bolt 5.

[0022] During operation, the large-sized rubber blocks first fall into the crushing mechanism 1. The crushing rollers 10, rotating in opposite directions with meshing teeth, apply powerful clamping, shearing, and tearing forces, forcibly breaking the material down into smaller particles, greatly increasing the material's specific surface area. Subsequently, the crushed material enters the inclined preheating mechanism 2 under gravity. This preheating mechanism 2 contains a rotatable mesh roller 23, with a heating pipe 24 fixed at its center. A circulating heat medium flows through the heating pipe 24, radiating and convectively heating the tumbling material through the pipe wall. This softens the rubber blocks, which are hard and have poor flowability at low temperatures, preventing them from becoming too hard and causing blockages inside the equipment.

[0023] A self-cooling annular cavity 25 is formed between the mesh roller 23 and the stationary outer sleeve 21. When the roller rotates, it drives the airflow in the annular cavity or forces airflow through the additional fan blades 230, effectively carrying away the heat conducted to the outer wall and ensuring that the outside of the device is within a safe temperature range. At the same time, the cooling effect can also effectively prevent the material from being too soft and sticking to the inner wall of the mesh roller 23, causing poor material discharge and blockage.

[0024] The preheated and softened material continuously falls into the mixing chamber 31. The hydraulic component 4 drives the upper jack 5 to move up and down to compact the material. During this process, the lifting and lowering motion of the upper jack 5 drives the stirring column 6 and stirring plate 62 to reciprocate inside the mixing chamber 31, continuously stirring and agitating the material inside the chamber. This breaks down the arch structure formed by the material accumulation, allowing the material to be evenly distributed in the mixing chamber and forming a good kneading relationship with the mixer rotor. The entire process is completed in a closed channel and chamber, with no dust spillage and no large amount of heat loss. This achieves integrated closed operation from feeding to mixing, significantly reducing the downtime and unblocking failure rate caused by blockages.

[0025] Furthermore, the crushing mechanism 1 includes a crushing chamber, inside which two sets of crushing rollers 10 are rotatably arranged. Crushing teeth 100 are spaced apart circumferentially on the crushing rollers 10, and the crushing teeth 100 on one crushing roller 10 mesh with the outer peripheral wall of the other crushing roller 10.

[0026] In some specific embodiments, the crushing mechanism 1 includes a crushing chamber, inside which two sets of parallel crushing rollers 10 are rotatably arranged. Crushing teeth 100 are spaced apart on the circumferential surfaces of both sets of crushing rollers 10. During rotation, the tips of the crushing teeth 100 on one set of rollers engage with the outer circumferential wall of the other set of rollers, maintaining a very small gap or even contact between the tooth tips and the circumferential or smooth surface of the other roller. Thus, when large pieces of rubber are drawn between the two rollers, they are subjected not only to the squeezing force of the rollers but, more importantly, to a "tooth-wall" shearing action: one side of the crushing teeth 100 pierces and drags the material like pincers, while the circumferential wall of the other roller acts as an anvil, tearing and splitting the material during the relative motion. This meshing crushing method is particularly suitable for highly elastic and hard rubber blocks, effectively preventing material slippage or entanglement on the rollers.

[0027] Furthermore, the preheating mechanism 2 also includes a front feeding chamber 20 and a rear feeding chamber 22, with the inlet of the front feeding chamber 20 connected to the outlet of the crushing chamber; The outlet end face of the front feeding chamber 20 and the inlet end face of the rear feeding chamber 22 are both provided with annular rotating grooves, and the upper and lower ends of the mesh roller 23 are respectively slidably arranged in the annular rotating grooves.

[0028] Specifically, the preheating mechanism 2 includes not only the mesh drum 23 and the heating tube 24, but also a front feeding chamber 20 and a rear feeding chamber 22. The inlet of the front feeding chamber 20 is sealed to the outlet of the crushing chamber to receive the crushed granules; the outlet of the rear feeding chamber 22 leads to the feed inlet 30 of the mixing chamber 31.

[0029] Both the outlet end face of the front feeding chamber 20 and the inlet end face of the rear feeding chamber 22 are machined with coaxial annular rotating grooves. The two ends of the mesh roller 23 are slidably fitted into these two annular rotating grooves, thus obtaining rotational support at both ends. Wear-resistant sealing rings can be embedded in the annular rotating grooves, ensuring both flexible rotation of the mesh roller 23 and dynamic sealing to prevent leakage of dust-laden hot air and maintain the airtightness of the preheating channel. The mesh roller 23 is arranged at an angle, with the inlet end higher and the outlet end lower. As the mesh roller 23 rotates, the material tumbles along the cylinder wall and gradually moves towards the lower end. The moving speed is determined by both the roller inclination angle and the rotation speed, allowing for flexible adjustment of the material's preheating residence time.

[0030] Specifically, bearing-like structural components can be fitted at both ends of the mesh roller 23, with the inner ring connected to the outer wall of the mesh roller 23 and the outer ring connected to the outer wall of the annular rotating groove.

[0031] Furthermore, a first pulley 26 is provided on the outer periphery of the mesh roller 23, and a power motor 28 is provided on the outer wall of the front discharge chamber 20. A power pulley 280 is provided on the power motor 28, and the power pulley 280 and the first pulley 26 are connected by a transmission belt 27. The outer sleeve 21 has an opening for the transmission belt 27 to pass through.

[0032] In order to drive the mesh roller 23 to rotate stably, as a preferred embodiment, a first pulley 26 is fixedly installed on the outer periphery of the mesh roller 23, a power motor 28 is fixedly installed on the outer wall of the front feeding chamber 20, a power pulley 280 is installed on the output shaft of the power motor 28, and the power pulley 280 and the first pulley 26 are connected by a transmission belt 27.

[0033] An opening is provided on the outer sleeve 21 at the position corresponding to the transmission belt 27 for the transmission belt 27 to pass through. This opening ensures that the transmission path of the transmission belt 27 is unobstructed.

[0034] The belt drive can buffer the impact, and the speed of the power motor 28 can be adjusted by the frequency converter, which can steplessly change the rotation speed of the mesh roller 23, thereby precisely adjusting the residence time and tumbling frequency of the material in the roller, so that the preheating degree matches the softening requirements of rubber materials with different hardness.

[0035] Furthermore, the outer peripheral wall of the mesh roller 23 is provided with fan blades 230, which are used to generate airflow when the mesh roller 23 rotates.

[0036] Furthermore, to enhance the heat dissipation capacity of the self-cooling annular cavity 25, fan blades 230 are also provided on the outer peripheral wall of the mesh roller 23. When the power motor 28 drives the mesh roller 23 to rotate, the fan blades 230 rotate along with it, generating airflow within the annular cavity. This airflow enters the interior of the mesh roller 23 through the holes on the mesh roller 23, appropriately cooling the material near the inner wall of the mesh roller 23, preventing the material from becoming too sticky due to excessive temperature and adhering to the inner wall of the mesh roller 23.

[0037] By heating the center and cooling the edges appropriately, we can ensure smooth material feeding while avoiding material blockage.

[0038] Furthermore, the heating tube 24 is provided with an inlet and outlet water passage 241 inside, which are connected at the far inlet end of the heating tube 24.

[0039] More specifically, the heating tube 24 has an independent inlet channel 240 and an outlet channel 241 inside, and these two channels are connected to each other at the end of the heating tube 24 away from the inlet, forming a U-shaped or coaxial sleeve-type circulation channel.

[0040] The heating medium flows in through the inlet channel 240 and transfers heat to the material inside the mesh drum 23 through the pipe wall as it flows along the pipeline. The medium temperature gradually decreases, and then it flows back to the external heat source for recirculation heating via the outlet channel 241. This dual-channel remote return structure ensures that the inlet and outlet pipe interfaces are located at the same end of the heating pipe 24, which facilitates centralized pipe arrangement and makes the structure more compact.

[0041] Furthermore, each of the two sets of crushing rollers 10 is equipped with an independent drive motor 11.

[0042] In some more specific embodiments, the two sets of crushing rollers 10 are each equipped with an independent drive motor 11. It is important to clarify that the primary purpose of this arrangement is to provide each set of crushing rollers 10 with independent and sufficient crushing power, ensuring that both sets of crushing rollers 10 can maintain a stable high torque output when large pieces of hard rubber are fed in. If a single motor is used to drive the two rollers via gear linkage, when encountering materials with uneven hardness or oversized pieces, a sudden increase in force on one side can easily lead to insufficient power distribution on the other side, resulting in stalling or loss of rotation, causing a sharp drop in crushing efficiency or even shutdown.

[0043] By equipping each set of crushing rollers 10 with an independent drive motor 11, each set of crushing rollers 10 can obtain the full torque under its rated motor power. The power of the two rollers does not interfere with each other and is sufficient for each other, thereby ensuring that the device can continuously and powerfully complete the clamping and crushing action when facing high hardness and large-diameter rubber materials.

[0044] In this configuration, the two sets of crushing rollers 10 rotate synchronously in opposite directions at a pre-set fixed speed ratio. The phase relationship of the crushing teeth 100 is calibrated during installation and remains unchanged during operation. This ensures that when the tooth tip of one set of crushing rollers 10 rotates to the meshing zone, it always maintains the designed clearance with the outer peripheral wall or tooth root surface of the other set of crushing rollers 10, forming a stable "tooth-wall" shearing pair. In this way, the risk of tooth tip collision caused by phase misalignment is effectively avoided, and the direct transmission of crushing force is guaranteed, improving the reliability of the whole machine in dealing with harsh feeding conditions from the power source.

[0045] Furthermore, the mixing chamber 31 is formed through the outer shell 3, and the mixing chamber 31 is located inside the outer shell 3. The side wall of the outer shell 3 is provided with a feed inlet 30, and the outlet of the rear discharge chamber 22 is connected to the feed inlet 30.

[0046] Regarding the follow-up stirring mechanism, it is understood that the mixing chamber 31 is enclosed by the outer shell 3 of the mixing mill, and a feed inlet 30 is opened on the side wall of the outer shell 3. The outlet of the rear discharge chamber 22 is connected to the feed inlet 30. The preheated and softened material enters the mixing chamber 31 through this closed path. There are no open links in the entire feeding process, realizing an integrated and sealed connection with the mixing mill. This not only prevents dust from escaping, but also reduces heat loss in the mixing chamber 31, which is beneficial for maintaining the process temperature.

[0047] Furthermore, a hydraulic assembly 4 is provided on the top of the outer casing 3, and the telescopic rod 40 of the hydraulic assembly 4 is located in the mixing chamber 31, with the top bolt 5 installed on the telescopic rod 40. The top bolt 5 has a through hole 50, and a trigger rod 51 is radially arranged in the through hole 50. The follow-up stirring mechanism is a stirring column 6. The top of the stirring column 6 is rotatably connected to the top of the outer shell 3. The outer peripheral wall of the stirring column 6 has a spiral groove 60, and the trigger rod 51 is slidably arranged in the spiral groove 60. The outer peripheral wall of the stirring column 6 also has a spiral mounting groove 61, and a stirring plate 62 is arranged in the spiral mounting groove 61.

[0048] Inside the mixing chamber 31, a hydraulic assembly 4 is installed on the top of the outer shell 3. The telescopic rod 40 of the hydraulic assembly 4 extends vertically into the mixing chamber 31, and the top bolt 5 is installed at the lower end of the telescopic rod 40.

[0049] A through hole 50 is machined on the body of the top bolt 5, and a trigger rod 51 is radially arranged inside the through hole 50. Meanwhile, the follow-up stirring mechanism is constructed as a stirring column 6. The top of the stirring column 6 is mounted to the inner top wall of the outer casing 3 via a bearing or other rotating connecting component, allowing the stirring column 6 to rotate freely around its own axis. A spiral groove 60 is machined on the outer peripheral wall of the stirring column 6, and the end of the trigger rod 51 is slidably inserted into the spiral groove 60. Furthermore, a spiral mounting groove 61 is also formed on the outer peripheral wall of the stirring column 6, and a stirring plate 62 is fixedly embedded within the spiral mounting groove 61.

[0050] When the hydraulic assembly 4 drives the upper bolt 5 to move up and down, the trigger rod 51 moves up and down synchronously. Since the trigger rod 51 is constrained within the spiral groove 60, its up-and-down motion forces the stirring column 6 to rotate around its own axis. This cylindrical cam mechanism converts linear motion into rotational motion, and its kinematic relationship satisfies the following: the relationship between the angular velocity ω of the stirring column 6 and the linear velocity v of the upper bolt 5 is ω=v / (r·tanα), where r is the radius of the stirring column 6 and α is the helix angle of the spiral groove 60 (related to the lead).

[0051] When the top bolt 5 is pressed down, the stirring column 6 rotates in the forward direction, and the stirring plate 62 rotates accordingly, cutting, pushing, and stirring the surrounding material. When the top bolt 5 is raised, the stirring column 6 rotates in the reverse direction, and the stirring plate 62 stirs the material in the opposite direction. In this way, for each compaction stroke completed by the top bolt 5, the stirring column 6 completes one reciprocating oscillation or full rotation, continuously agitating the material in the mixing chamber 31. This effectively breaks the force chain arch structure between material particles, preventing the formation of a dense material arch below the top bolt 5, allowing the material to smoothly enter the rotor kneading zone, fundamentally solving the problem of hard material accumulation and blockage.

[0052] The material in the mixing chamber 31 is cleverly stirred by the movement of the top bolt 5, so as to ensure that the material is not squeezed, bridged or stuck, and to ensure the normal mixing of the material.

[0053] Furthermore, when the top plug 5 is at its lowest position, the lower end face of the stirring column 6 is coplanar with the lower bottom face of the top plug 5.

[0054] Finally, to ensure safety during mechanism movement and optimize compaction, when the top bolt 5 moves to its lowest limit position, the lower end face of the stirring column 6 is exactly coplanar with the lower bottom face of the top bolt 5. This design offers two advantages: first, it ensures that the stirring column 6 does not protrude beyond the bottom face of the top bolt 5, preventing it from colliding and interfering with the rotor at the bottom of the mixing chamber 31; second, it maintains the lower bottom face of the top bolt 5 as a complete plane, allowing for uniform compaction pressure to be applied to the material. Meanwhile, the stirring plate 62 remains within the material layer above this plane during rotation, providing in-situ disturbance to the material above the compaction zone. The compaction and stirring actions thus work in tandem, improving the uniformity of material density within the mixing chamber 31, eliminating dead zones caused by localized accumulation, and further ensuring the mixing quality.

[0055] The crushing mechanism 1, the preheating mechanism 2, and the follow-up mixing mechanism work together to form an integrated closed feeding and anti-blocking solution, which significantly improves the production smoothness of low-temperature, high-hardness rubber materials and greatly reduces the frequency of shutdown for unblocking.

[0056] Working principle: When the feeding operation begins, the entire large-sized rubber block first enters the crushing mechanism 1. Two sets of counter-rotating crushing rollers 10 use the meshing relationship between the crushing teeth 100 spaced apart on them and the outer peripheral wall of the rollers to apply a combination of clamping, tearing and shearing action to the material, forcibly breaking down the large material into smaller particles, thereby greatly increasing the specific surface area of ​​the material and creating conditions for subsequent uniform heating.

[0057] The crushed granules fall into the preheating mechanism 2 under gravity. The core of the preheating mechanism 2 is an inclined, rotatable mesh drum 23, with a heating pipe 24 fixed at its center. A circulating heat medium flows through the heating pipe 24. Driven by a power source, the mesh drum 23 rotates, and the material continuously tumbles, slides, and moves towards the bottom outlet within the drum along the inclined direction. During this process, the heating pipe 24 continuously and uniformly heats the material through radiation and convection, softening the hard, poorly flowing granules at low temperatures, reducing surface viscosity, and significantly improving flowability. This fundamentally eliminates the possibility of bridging or jamming in the feeding channel due to excessively hard material.

[0058] Meanwhile, a self-cooling annular cavity 25 is formed between the mesh roller 23 and the stationary outer sleeve 21. When the mesh roller 23 rotates, airflow is generated by the fan blades 230 to appropriately cool the material near the inner wall of the mesh roller 23, preventing it from sticking to the inner wall of the mesh roller 23 and affecting the normal flow of the material.

[0059] Preheated and softened material continuously enters the mixing chamber 31 through a sealed feeding cavity. The top bolt 5, driven by the hydraulic assembly 4, moves up and down to compact the material within the chamber. During the lifting and lowering of the top bolt 5, the trigger rod 51 fixed to the top bolt 5 engages with the spiral groove 60 on the outer peripheral wall of the stirring column 6, converting the linear motion of the top bolt 5 into the reciprocating rotation of the stirring column 6. The stirring plate 62 on the stirring column 6 then continuously stirs and agitates the material inside the mixing chamber 31, constantly disrupting any force chain arches that may form between material particles, effectively preventing the formation of dense material arches below the top bolt 5, and ensuring that the material can smoothly enter the rotor kneading zone.

[0060] The feeding process and the internal environment of the mixing chamber 31 form an integrated system. Through the synergistic effect of first crushing to increase the heating surface, then uniform heating to improve the material flowability, and finally active breaking of material arching by follow-up stirring, the problems of bridging, jamming and blockage that easily occur in the feeding process of low-temperature hard large rubber materials are completely solved, and the smoothness and continuity of the feeding process of the mixing mill are significantly improved.

[0061] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this application.

Claims

1. An integrated closed feeding anti-blocking device for an internal mixer, characterized in that, include: Crushing mechanism (1) is used for preliminary crushing of materials; The preheating mechanism (2) includes an inclined and rotatable mesh roller (23) for feeding; an outer sleeve (21) is provided on the outside of the mesh roller (23), and a self-cooling annular cavity (25) is provided between the mesh roller (23) and the outer sleeve (21); a heating tube (24) is provided at the center of the inside of the mesh roller (23). The follow-up stirring mechanism is located inside the mixing chamber (31) and rotates back and forth with the up and down movement of the top bolt (5).

2. The integrated closed feeding and anti-clogging device for an internal mixer according to claim 1, characterized in that, The crushing mechanism (1) includes a crushing chamber, and two sets of crushing rollers (10) are rotatably arranged inside the crushing chamber. The crushing rollers (10) are circumferentially spaced with crushing teeth (100), and the crushing teeth (100) on one of the crushing rollers (10) mesh with the outer peripheral wall of the other crushing roller (10).

3. The integrated closed feeding and anti-clogging device for an internal mixer according to claim 2, characterized in that, The preheating mechanism (2) further includes a front feeding chamber (20) and a rear feeding chamber (22), the inlet of the front feeding chamber (20) being connected to the outlet of the crushing chamber; The outlet end face of the front feeding chamber (20) and the inlet end face of the rear feeding chamber (22) are both provided with annular rotating grooves, and the upper and lower ends of the mesh roller (23) are respectively slidably arranged in the annular rotating grooves.

4. The integrated closed feeding and anti-blocking device for internal mixers according to claim 3, characterized in that, The outer periphery of the mesh roller (23) is provided with a first pulley (26), the outer wall of the front discharge chamber (20) is provided with a power motor (28), the power motor (28) is provided with a power pulley (280), and the power pulley (280) and the first pulley (26) are connected by a transmission belt (27). The outer sleeve (21) is provided with an opening for the transmission belt (27) to pass through.

5. The integrated closed feeding and anti-clogging device for an internal mixer according to claim 1, characterized in that, The outer peripheral wall of the mesh roller (23) is provided with fan blades (230) for generating airflow when the mesh roller (23) rotates.

6. The integrated closed feeding and anti-blocking device for an internal mixer according to claim 1, characterized in that, The heating tube (24) is provided with an inlet channel (240) and an outlet channel (241) inside, and the inlet channel and the outlet channel (241) are connected to the far inlet end of the heating tube (24).

7. The integrated closed feeding and anti-blocking device for an internal mixer according to claim 2, characterized in that, The two sets of crushing rollers (10) are each equipped with an independent drive motor (11).

8. The integrated closed feeding and anti-blocking device for an internal mixer according to claim 3, characterized in that, The mixing chamber (31) is formed through the outer shell (3), the mixing chamber (31) is located inside the outer shell (3), the side wall of the outer shell (3) is provided with a feed inlet (30), and the outlet of the rear discharge chamber (22) is connected to the feed inlet (30).

9. The integrated closed feeding and anti-blocking device for an internal mixer according to claim 8, characterized in that, The top of the outer shell (3) is provided with a hydraulic assembly (4), the telescopic rod (40) of the hydraulic assembly (4) is located in the mixing chamber (31), and the top bolt (5) is provided on the telescopic rod (40); The top bolt (5) is provided with a through hole (50), and a trigger rod (51) is provided radially in the through hole (50). The follow-up stirring mechanism is a stirring column (6). The top of the stirring column (6) is rotatably connected to the top of the outer shell (3). The outer peripheral wall of the stirring column (6) is provided with a spiral groove (60), and the trigger rod (51) is slidably disposed in the spiral groove (60). The outer peripheral wall of the stirring column (6) is also provided with a spiral mounting groove (61), and a stirring plate (62) is provided in the spiral mounting groove (61).

10. The integrated closed feeding and anti-blocking device for an internal mixer according to claim 9, characterized in that, When the top plug (5) is at the bottom, the lower end face of the stirring column (6) is coplanar with the lower bottom face of the top plug (5).

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