Closed mixing device for low-temperature silicone rubber compound

Abstract

The invention belongs to the technical field of low-temperature silicone rubber mixing, and particularly relates to a low-temperature silicone rubber mixed rubber closed mixing device which comprises a support, the support is placed on the ground, a transition mechanism is installed at the upper end of the interior of the support, and the transition mechanism is used for conducting blocking and discharging transition operation on premixed materials. A transition mechanism is arranged at the upper end of the main mixing mechanism, a premixing mechanism is detachably arranged at the upper end of the transition mechanism, a main mixing mechanism is detachably arranged at the lower end of the transition mechanism, and a rotor mechanism is rotatably connected between the premixing mechanism and the main mixing mechanism. The rubber material performance difference caused by temperature fluctuation is greatly reduced, the stability of product quality is ensured, pre-dispersion of raw rubber, silicone oil and white carbon black can be realized, meanwhile, molecular chain breakage caused by long-time retention of the rubber material in a high-temperature area is avoided, and the physical properties of the material are retained.

Description

Technical Field

[0001] The present invention relates to the technical field of low-temperature silicone rubber mixing, and specifically to a closed mixing device for low-temperature silicone rubber mixing gum. Background Art

[0002] Existing internal mixers rely on PID control and respond sluggishly to the rapid cooling requirements for low-temperature mixing (such as the target temperature ≤ 50°C), which easily leads to excessively high local temperatures during the mixing process. For example, the heat generated by rotor shearing may cause the instantaneous temperature of the rubber compound to exceed 60°C, triggering the structuring of raw rubber or the premature decomposition of vulcanizing agents. At the same time, the temperature difference between the inner wall of the mixing chamber and the rotor can reach 10 - 15°C. Especially when dealing with high-filler formulations, fillers such as silica are prone to form "scorch nuclei" due to local overheating, resulting in uneven vulcanization.

[0003] Therefore, we propose a closed mixing device for low-temperature silicone rubber mixing gum. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides the following technical solutions: A closed mixing device for low-temperature silicone rubber mixing gum, which includes: a bracket; The bracket is placed on the ground. An intermediate mechanism is installed at the upper end inside the bracket, which is used for blocking and feeding transition operations on the premixed materials. The premixing mechanism is detachably installed at the upper end of the intermediate mechanism, and the main mixing mechanism is detachably installed at the lower end of the intermediate mechanism. A rotor mechanism is rotatably connected between the premixing mechanism and the main mixing mechanism. Through the cooperation of the rotor mechanism and the premixing mechanism, it is used for premixing raw rubber, silicone oil, and silica to form a uniform premixed slurry. Through the cooperation of the rotor mechanism and the main mixing mechanism, it is used for dispersing and shearing the slurry, fillers, and vulcanizing agents; The rotor mechanism includes: a connection component and an auxiliary component; the auxiliary component includes: a bidirectional screw; the bidirectional screw is rotatably connected to the center of the bottom of the connection component, the bottom of the bidirectional screw is rotatably connected to the center of the top of the chassis, the chassis is installed in the middle of the inner wall of the rotor inner rod, a driving motor is installed at the center of the bottom of the chassis, the upper and lower outer walls of the bidirectional screw are both threadedly connected with threaded blocks, the outer circumferences of the threaded blocks are rotatably connected with connecting rods, the other ends of the connecting rods are rotatably connected to the upper ends of the inner walls of the push rods, and spring plungers are installed on the outer walls of the push rods; The premixing mechanism includes: a premixing component and a kneading component. The premixing component includes: a mounting groove and an auxiliary gear; the kneading component includes: a follower gear ring. The outer wall of the follower gear ring is provided with guide blocks. The follower gear ring slides into the interior of the mounting groove through the guide blocks, and the follower gear ring is rotatably connected inside the guide groove through the guide blocks. The inner wall of the follower gear ring is provided with teeth, which are meshed and connected to the outer wall of the auxiliary gear. The other end of the outer wall of the auxiliary gear is meshed and connected to a gear ring. Two sets of spiral rods are provided at both ends of the bottom of the follower gear ring. The bottom of the spiral rod is connected with a limiting rod, and the limiting rod penetrates through the hollow groove and is slidably connected inside the limiting groove.

[0005] As a preferred embodiment of the closed kneading device for low-temperature silicone rubber kneaded rubber of the present invention, wherein: the transition mechanism includes: a material blocking component; The material blocking component is installed at the upper end inside the bracket. A blanking component is provided at the bottom of the material blocking component, and a limiting component is provided at the top of the material blocking component.

[0006] As a preferred embodiment of the closed kneading device for low-temperature silicone rubber kneaded rubber of the present invention, wherein: the material blocking component includes: a material blocking ring; The material blocking ring is installed at the upper end inside the bracket, and a pneumatic valve is provided on the outer wall of the material blocking ring; The blanking component includes: a blanking plate; The blanking plate is arranged at the bottom of the material blocking ring, and an air pump nozzle is installed at the bottom of the blanking plate; The limiting component includes: a limiting plate; The limiting plate is arranged at the top of the blanking plate. A hollow groove is provided at the inner end of the surface of the limiting plate, and a limiting groove is provided inside the hollow groove. A sliding ring is rotatably connected between the hollow groove and the limiting groove.

[0007] As a preferred embodiment of the closed kneading device for low-temperature silicone rubber kneaded rubber of the present invention, wherein: the rotor mechanism includes: a rotor component; The bottom of the rotor component is installed at the lower end inside the main kneading mechanism. A rotor inner rod is provided inside the rotor component. The top of the rotor component and the rotor inner rod are connected to the bottom of the connecting component, and the top of the connecting component is connected to the driving end of the premixing mechanism. An ethylene glycol circulation component is installed between the rotor component and the rotor inner rod, and an auxiliary component is installed inside the rotor inner rod.

[0008] As a preferred embodiment of the closed kneading device for low-temperature silicone rubber kneaded rubber of the present invention, wherein: the rotor component includes: a fixing ring; The fixing ring is installed at the lower end inside the main kneading mechanism. The upper end of the fixing ring is rotatably connected to a rotor outer rod. A threaded groove is provided on the outer wall of the rotor outer rod, and circular grooves are provided around the upper end of the outer wall of the rotor outer rod; The connecting component includes: a connecting ring; The outer bottom of the connecting ring is connected to the top of the outer rotor rod and the inner rotor rod. The lower end of the outer wall of the connecting ring is provided with a toothed ring. The inner top of the connecting ring is provided with a liquid outlet groove, which is connected to the output end of the ethylene glycol circulation component. The outer top of the connecting ring is provided with a liquid inlet groove, which is connected to the input end of the ethylene glycol circulation component; The ethylene glycol circulation component includes: a liquid inlet circulation pipe; The liquid inlet circulation pipe is installed inside the thread groove. The top of the liquid inlet circulation pipe is communicated with the liquid inlet groove. The inner wall end of the liquid inlet circulation pipe is provided with a liquid outlet circulation pipe. The liquid outlet circulation pipe is installed between the inner wall of the outer rotor rod and the outer wall of the inner rotor rod, and the liquid outlet circulation pipe is communicated with the liquid outlet groove.

[0009] As a preferred scheme of the closed mixing device for low-temperature silicone rubber mixing gum of the present invention, wherein: the premixing mechanism includes: a premixing component; The premixing component is detachably installed on the top of the limiting disc. The top of the premixing component is detachably installed with a rotating component. The output end of the rotating component is connected to the center of the top of the connecting component. The inside of the premixing component is detachably installed with a mixing component.

[0010] As a preferred scheme of the closed mixing device for low-temperature silicone rubber mixing gum of the present invention, wherein: the premixing component further includes: a premixing cylinder; The premixing cylinder is detachably installed on the top of the limiting disc. The lower left side of the premixing cylinder is connected with a circulating water inlet pipe. The upper right end of the premixing cylinder is connected with a circulating water outlet pipe. The inner wall around the premixing cylinder is provided with installation grooves. The upper end of the inner wall of the premixing cylinder is provided with guide grooves, which are communicated with the installation grooves. The upper end around the inner wall of the premixing cylinder is provided with installation rods, and the bottom of the installation rods is rotatably connected with auxiliary gears; The rotating component includes: a feeding disc; The feeding disc is detachably installed on the top of the premixing cylinder. The center of the top of the feeding disc is connected with a rotating motor. The bottom output end of the rotating motor is connected to the top of the connecting component. The upper left end of the top of the feeding disc is provided with an ethylene glycol inlet pipe, which is communicated with the liquid inlet groove. The upper right end of the top of the feeding disc is provided with an ethylene glycol outlet pipe, which is communicated with the liquid outlet groove.

[0011] As a preferred scheme of the closed mixing device for low-temperature silicone rubber mixing gum of the present invention, wherein: the main mixing mechanism includes: a main mixing component; The main mixing component is detachably installed at the bottom of the blanking disc. The vertical shearing gear set is installed around the inner wall of the main mixing component. A horizontal shearing wheel is arranged in the middle of the main mixing component. The horizontal shearing wheel is connected to the lower end of the outer wall of the outer rotor rod. The bottom of the vertical shearing gear set is connected to the top of the rotating component.

[0012] As a preferred scheme of the closed mixing device for low-temperature silicone rubber mixing gum of the present invention, wherein: the main mixing component includes: a main mixing cylinder; The main mixing cylinder is detachably installed at the bottom of the feeding tray. Trapezoidal plates are provided around the inner wall of the main mixing cylinder. Vertical shearing gear sets are rotatably connected to the outer walls around the trapezoidal plates. A discharge tray is installed at the bottom of the main mixing cylinder. A fixing ring is installed at the upper end of the inner wall of the discharge tray. A rotating groove is provided on the outer side of the lower end inside the main mixing cylinder; The rotating assembly includes: a rotating motor; The rotating motor is installed on one side of the lower end of the outer wall of the main mixing cylinder. The output end of the rotating motor is connected to a gear. The lower end of the outer wall of the gear is meshed and connected with the outer teeth of a double gear turntable. The double gear turntable is rotatably connected inside the rotating groove. The inner teeth of the double gear turntable are meshed and connected with the bottom of the vertical shearing gear set.

[0013] Compared with the prior art: Through the cooperation of the ethylene glycol circulation component of the rotor mechanism and the premixing cylinder of the premixing mechanism, and then through the premixing operation of the spiral rod, the temperature can be quickly stabilized, preventing the rubber compound from degrading due to overheating or the premature decomposition of the vulcanizing agent. The traditional equipment has a slow thermal response and is prone to local overheating. At the same time, through the rotor temperature control and the temperature difference between the wall surface of the internal mixer and the rotor, the "wall effect" caused by the large temperature difference between the wall surface and the rotor of the traditional equipment can be eliminated, avoiding the sticking of the rubber compound to the wall and local overheating, making the rubber compound in a uniform temperature environment during the entire mixing process, greatly reducing the performance difference of the rubber compound caused by temperature fluctuations, and ensuring the stability of product quality; Through the cooperation of the spiral rod and the liquid inlet circulation pipe, a reverse drag on the rubber compound can be formed. After the rubber compound is strongly sheared and heated at the spiral rod, the rubber compound is forced into the cooling area of the liquid inlet circulation pipe, realizing high-frequency circulation of shearing and cooling, and then realizing the pre-dispersion of raw rubber, silicone oil and silica, while avoiding the breakage of the molecular chain of the rubber compound due to long-term retention in the high-temperature area and retaining the physical properties of the material; Through the cooperation of the rotor mechanism and the main mixing mechanism, the mixture is sheared horizontally and vertically. Through the superposition of axial convection and vertical shearing, the rubber compound forms a three-dimensional vortex flow in the cavity, and its movement trajectory simultaneously includes circumferential rotation, axial movement and vertical extrusion, ensuring that each particle experiences shearing actions in multiple directions and with multiple intensities, and at the same time can improve the efficiency of breaking the silica agglomerates. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the overall structural schematic diagram provided by the present invention; Figure 2 It is the overall split structural schematic diagram provided by the present invention; Figure 3 It is the split structural schematic diagram of the transition mechanism provided by the present invention; Figure 4 It is the sectional structural schematic diagram of the limiting component provided by the present invention; Figure 5Schematic diagram of the blanking component structure provided by the present invention; Figure 6 Schematic diagram of the rotor mechanism structure provided by the present invention; Figure 7 Schematic diagram of the rotor assembly structure provided by the present invention; Figure 8 Schematic diagram of the ethylene glycol circulation component structure provided by the present invention; Figure 9 Schematic diagram of the split structure of the ethylene glycol circulation component provided by the present invention; Figure 10 Schematic diagram of the auxiliary component structure provided by the present invention; Figure 11 Schematic diagram of the premixing mechanism structure provided by the present invention; Figure 12 Schematic diagram of the split structure of the premixing component and the rotating component provided by the present invention; Figure 13 Schematic diagram of the premixing component structure provided by the present invention; Figure 14 Schematic diagram of the mixing component structure provided by the present invention; Figure 15 Schematic diagram of the split structure of the mixing component provided by the present invention; Figure 16 Schematic diagram of the main mixing mechanism structure provided by the present invention; Figure 17 Schematic diagram of the main mixing component structure provided by the present invention; Figure 18 Schematic diagram of the vertical shear gear set connection structure provided by the present invention; Figure 19 Schematic diagram of the rotating component structure provided by the present invention.

[0015] In the figure: Bracket 1, transition mechanism 2, material blocking component 21, material blocking ring 211, pneumatic valve 212, blanking component 22, blanking plate 221, air pump nozzle 222, limiting component 23, limiting plate 231, hollow groove 232, slip ring 233, limiting groove 234, rotor mechanism 3, rotor component 31, fixing ring 311, outer rotor rod 312, thread groove 313, circular groove 314, inner rotor rod 32, connecting component 33, connecting ring 331, tooth ring 332, liquid outlet groove 333, liquid inlet groove 334, ethylene glycol circulation component 34, inlet liquid circulation pipe 341, outlet liquid circulation pipe 342, auxiliary component 35, bidirectional screw 351, chassis 352, drive motor 353, threaded block 354, connecting rod 355, push rod 356, spring plunger 357, premixing mechanism 4, premixing component 41, premixing cylinder 411, circulating water inlet pipe 412, circulating water outlet pipe 413, installation groove 414, guide groove 415, installation rod 416, auxiliary gear 417, rotating component 42, feeding plate 421, rotating motor 422, ethylene glycol inlet pipe 423, ethylene glycol outlet pipe 424, mixing component 43, follower tooth ring 431, guide block 432, tooth 433, spiral rod 434, limiting rod 435, main mixing mechanism 5, main mixing component 51, main mixing cylinder 511, trapezoidal plate 512, discharging plate 513, rotating groove 514, vertical shearing gear set 52, horizontal shearing wheel 53, rotating component 54, rotating motor 541, double gear turntable 542. Detailed implementation manners

[0016] To make the objectives, technical solutions and advantages of the present invention clearer, the following will further describe the implementation manners of the present invention in detail with reference to the accompanying drawings.

[0017] The present invention provides a closed mixing device for low-temperature silicone rubber mixing gum. Please refer to Figures 1 - 19 , which includes a bracket 1, a transition mechanism 2, a rotor mechanism 3, a premixing mechanism 4 and a main mixing mechanism 5; The bracket 1 is placed on the ground, and the device can be supported and placed through the bracket 1; The transition mechanism 2 is installed at the upper inner part of the bracket 1 and is used to block and perform a blanking transition operation on the premixed material through the transition mechanism 2. The transition mechanism 2 includes: a material blocking component 21, a material blocking ring 211, a pneumatic valve 212, a blanking component 22, a blanking plate 221, an air pump nozzle 222, a limiting component 23, a limiting plate 231, a hollow groove 232, a sliding ring 233 and a limiting groove 234; the material blocking component 21 is installed at the upper inner part of the bracket 1, and the bracket 1 can support the material blocking component 21. The material blocking component 21 can block and open / close the blanking of the slurry premixed by the premixing mechanism 4. The material blocking ring 211 is installed at the upper inner part of the bracket 1, and a pneumatic valve 212 is provided on the outer wall of the material blocking ring 211. By pushing or contracting the valve through the pneumatic valve 212, the falling slurry can be blocked and blanked. The bottom of the material blocking component 21 is provided with a blanking component 22. Through the blanking component 22, the slurry falling after the material blocking component 21 is opened / closed can be received and quantitatively sprayed through an external air pump. The blanking plate 221 is arranged at the bottom of the material blocking ring 211, and an air pump nozzle 222 is installed at the bottom of the blanking plate 221. The premixed slurry is received through the blanking plate 221 and introduced into the interior of the air pump nozzle 222. By closing the solenoid valve at the top of the air pump nozzle 222 and then through an external air pump, the slurry stored inside can be quantitatively sprayed, so that the slurry is sprayed into the interior of the main mixing mechanism 5. The top of the material blocking component 21 is provided with a limiting component 23. The limiting component 23 can support and limit the installation of the premixing mechanism 4. The limiting plate 231 is arranged at the top of the blanking plate 221, and a hollow groove 232 is provided at the inner side end of the surface of the limiting plate 231. A limiting groove 234 is provided inside the hollow groove 232. Through the cooperation of the hollow groove 232 and the limiting groove 234, the limiting rod 435 can be placed, and the rotation of the limiting rod 435 can be limited and guided. A sliding ring 233 is rotatably connected between the hollow groove 232 and the limiting groove 234. The sliding ring 233 is provided in two groups, and the limiting rod 435 is clamped between the two groups of sliding rings 233. Thus, the sliding ring 233 rotates and turns with the limiting rod 435, and further blocks the falling slurry; The rotor mechanism 3 is rotatably connected between the premixing mechanism 4 and the main mixing mechanism 5. The rotor mechanism 3 includes: a rotor assembly 31, a fixing ring 311, a rotor outer rod 312, a thread groove 313, a circular groove 314, a rotor inner rod 32, a connecting assembly 33, a connecting ring 331, a gear ring 332, a liquid outlet groove 333, a liquid inlet groove 334, an ethylene glycol circulation assembly 34, a liquid inlet circulation pipe 341, a liquid outlet circulation pipe 342, an auxiliary assembly 35, a bidirectional screw 351, a chassis 352, a driving motor 353, a thread block 354, a connecting rod 355, a push rod 356, and a spring plunger 357; the bottom of the rotor assembly 31 is installed at the lower inner part of the main mixing mechanism 5, the fixing ring 311 is installed at the lower inner part of the main mixing mechanism 5, the upper end of the fixing ring 311 is rotatably connected to the rotor outer rod 312, the outer wall of the rotor outer rod 312 is provided with a thread groove 313, and the installation of the ethylene glycol circulation assembly 34 can be placed through the thread groove 313. The outer wall of the upper end of the rotor outer rod 312 is provided with circular grooves 314 around it. The rotor inner rod 32 is arranged inside the rotor assembly 31. The tops of the rotor assembly 31 and the rotor inner rod 32 are connected to the bottom of the connecting assembly 33. The top of the connecting assembly 33 is connected to the driving end of the premixing mechanism 4. Through the driving of the premixing mechanism 4, the connecting assembly 33, the rotor assembly 31, and the rotor inner rod 32 can be driven to rotate. The outer bottom of the connecting ring 331 is connected to the tops of the rotor outer rod 312 and the rotor inner rod 32. The lower outer wall of the connecting ring 331 is provided with a gear ring 332. The inner top of the connecting ring 331 is provided with a liquid outlet groove 333, and the liquid outlet groove 333 is connected to the output end of the ethylene glycol circulation assembly 34. The outer top of the connecting ring 331 is provided with a liquid inlet groove 334, and the liquid inlet groove 334 is connected to the input end of the ethylene glycol circulation assembly 34. Through the connection between the liquid outlet groove 333 and the liquid inlet groove 334 and the output end and the input end of the ethylene glycol circulation assembly 34, the externally connected ethylene glycol solution can be circulated and transported. An ethylene glycol circulation assembly 34 is installed between the rotor assembly 31 and the rotor inner rod 32. Through the ethylene glycol circulation assembly 34, the rubber compound can be forced to contact the cooling surface frequently in the premixing area, reducing the shear heat retention time. The liquid inlet circulation pipe 341 is installed inside the thread groove 313, and the top of the liquid inlet circulation pipe 341 is connected to the liquid inlet groove 334. Through the liquid inlet groove 334, the ethylene glycol solution can be injected into the liquid inlet circulation pipe 341. The inner wall end of the liquid inlet circulation pipe 341 is provided with a liquid outlet circulation pipe 342. The liquid outlet circulation pipe 342 is installed between the inner wall of the rotor outer rod 312 and the outer wall of the rotor inner rod 32, and the liquid outlet circulation pipe 342 is connected to the liquid outlet groove 333. Through the cooperation between the liquid outlet groove 333 and the liquid outlet circulation pipe 342, the ethylene glycol solution with increased temperature can be circulated and discharged. An auxiliary assembly 35 is installed inside the rotor inner rod 32. Through the cooperation between the auxiliary assembly 35 and the mixing assembly 43, the premixed materials are sheared and pre-mixed, and at the same time, the local high pressure of the raw materials of the premixed materials can be released. The bidirectional screw 351 is rotatably connected to the center of the bottom of the connecting ring 331,The bottom of the bidirectional screw 351 is rotatably connected to the top center of the chassis 352. The chassis 352 is installed in the middle of the inner wall of the rotor inner rod 32. A driving motor 353 is installed at the bottom center of the chassis 352. Driven by the driving motor 353, the bidirectional screw 351 can be driven to rotate. Threaded blocks 354 are threadedly connected to both the upper and lower ends of the outer wall of the bidirectional screw 351. By rotating the bidirectional screw 351, the two groups of threaded blocks 354 can be driven to approach or move away from each other. Connecting rods 355 are rotatably connected to the periphery of the outer wall of the threaded block 354. The other end of the connecting rod 355 is rotatably connected to the upper end of the inner wall of the push rod 356. By the lifting movement of the threaded block 354, the push rod 356 can be driven to perform expansion and contraction operations. A spring plunger 357 is installed on the outer wall of the push rod 356. The spring plunger 357 is in a spiral state in the rotor outer rod 312. When the push rod 356 expands, the spring plunger 357 can penetrate the circular groove 314 to perform ductile extrusion on the raw rubber and the mixture in the rotor outer rod 312, thereby locally releasing the high pressure of the raw rubber mixture. Under high pressure, the raw material contains undispersed aggregates, bubbles or locally high-viscosity regions. At the moment of pressure relief, the Joule-Thomson effect occurs, and the volume expansion causes microcracks to be generated inside the aggregates. In cooperation with the spiral rod 434, the "stress breaking and flow tearing" dual effects are realized. The high-pressure raw material is instantaneously released to the cooling surface of the thread groove 313, so that it can quickly cool down in a low-pressure environment, and the viscosity suddenly increases to form an "alternating shear of high to low viscosity", promoting the interfacial peeling of the silica aggregates in the temperature and stress gradients, and improving the crushing efficiency; The premixing mechanism 4 is detachably installed at the upper end of the transition mechanism 2. Through the cooperation of the rotor mechanism 3 and the premixing mechanism 4, it is used for premixing raw rubber, silicone oil and silica to form a uniform premixed rubber paste. The premixing mechanism 4 includes: a premixing assembly 41, a premixing cylinder 411, a circulating water inlet pipe 412, a circulating water outlet pipe 413, an installation groove 414, a guide groove 415, an installation rod 416, an auxiliary gear 417, a rotating assembly 42, a feeding disk 421, a rotating motor 422, an ethylene glycol inlet pipe 423, an ethylene glycol outlet pipe 424, a mixing component 43, a follower gear ring 431, a guide block 432, teeth 433, a spiral rod 434 and a limiting rod 435; The premixing assembly 41 is detachably installed on the top of the limiting disk 231, and the premixing cylinder 411 is detachably installed on the top of the limiting disk 231. The premixing cylinder 411 is provided with three layers. The outermost layer is a water circulation layer, the middle layer is a composite fatty acid phase change material, and through the composite fatty acid phase change material, the temperature lag caused by the pipeline resistance of the outer layer of circulating water can be compensated. The innermost layer is a heat-conducting silicone heat dissipation layer, and through the heat-conducting silicone heat dissipation layer, the heat transferred by the middle layer can be evenly diffused to the entire cavity wall surface, eliminating the heat resistance defects at the welds and bolt connections of the traditional metal jacket, realizing the temperature uniformity of the cavity wall. The elastomer material can absorb the small deformations of the rotor and the cavity wall, avoid the increase of contact thermal resistance, and ensure long-term stable heat conduction. The lower left side of the left end of the premixing cylinder 411 is connected to the circulating water inlet pipe 412. Through the circulating water inlet pipe 412, an external water source is connected to introduce the water source into the water circulation layer arranged in the outermost layer of the premixing cylinder 411. The upper right end of the top of the premixing cylinder 411 is connected to the circulating water outlet pipe 413, and through the circulating water outlet pipe 413, the circulating water can be discharged from the water circulation layer. Installation grooves 414 are arranged around the inner wall of the premixing cylinder 411, and the installation grooves 414 can install the mixing component 43. Guide grooves 415 are arranged at the upper end of the inner wall of the premixing cylinder 411, and the guide grooves 415 are communicated with the installation grooves 414. Through the guide grooves 415 and the installation grooves 414, the mixing component 43 can be installed. At the same time, through the guide grooves 415, the rotation of the mixing component 43 can be limited and guided. Installation rods 416 are arranged around the upper end of the inner wall of the premixing cylinder 411. The bottom of the installation rod 416 is rotatably connected to the auxiliary gear 417. The rotating assembly 42 is detachably installed on the top of the premixing assembly 41. The output end of the rotating assembly 42 is connected to the center of the top of the connecting component 33. Through the drive of the rotating assembly 42, the connecting component 33, the rotor assembly 31 and the rotor inner rod 32 can be driven to rotate. The feeding disk 421 is detachably installed on the top of the premixing cylinder 411. The center of the top of the feeding disk 421 is connected to the rotating motor 422. The bottom output end of the rotating motor 422 is connected to the top of the connecting component 33. Through the rotation of the rotating motor 422, the connecting component 33 can be driven to rotate. The left end of the top of the feeding disk 421 is provided with an ethylene glycol inlet pipe 423, and the ethylene glycol inlet pipe 423 is communicated with the liquid inlet groove 334. The right end of the top of the feeding disk 421 is provided with an ethylene glycol outlet pipe 424, and the ethylene glycol outlet pipe 424 is communicated with the liquid outlet groove 333.Through the cooperation of the ethylene glycol inlet pipe 423 and the ethylene glycol outlet pipe 424, the external ethylene glycol solution can enter the liquid outlet tank 333 through the ethylene glycol inlet pipe 423, and then the ethylene glycol solution is introduced into the internal part of the liquid inlet circulation pipe 341 through the liquid outlet tank 333, so that the heat generated during the shearing of the raw rubber by the ethylene glycol solution inside the liquid inlet circulation pipe 341 can be cooled. The ethylene glycol solution is sucked out by the pump body connected to the outside of the ethylene glycol outlet pipe 424 through the liquid outlet circulation pipe 342 and the liquid outlet tank 333, thus realizing the circulation of the ethylene glycol solution and ensuring that the ethylene glycol solution is always at -10°C. A mixing component 43 is detachably installed inside the premixing component 41. By the rotation of the connecting component 33, the premixing component 41 can drive the mixing component 43 to rotate, so that the mixing component 43 can perform premixing and shearing operations on the raw rubber and the mixture. Guide blocks 432 are provided on the outer wall of the follower gear ring 431. The follower gear ring 431 slides into the inside of the installation groove 414 through the guide blocks 432. Through the cooperation of the installation groove 414 and the guide groove 415, the follower gear ring 431 can be detachably installed. The follower gear ring 431 is rotationally connected inside the guide groove 415 through the guide blocks 432. The guide groove 415 can guide the rotation of the follower gear ring 431. Teeth 433 are provided on the inner wall of the follower gear ring 431. The teeth 433 are meshed and connected with the outer wall of the auxiliary gear 417. The other end of the outer wall of the auxiliary gear 417 is meshed and connected with the gear ring 332. By the rotation of the connecting ring 331 and the gear ring 332, the auxiliary gear 417 can be driven to rotate, so that the auxiliary gear 417 drives the follower gear ring 431 to rotate. At this time, the rotation direction of the follower gear ring 431 is opposite to the rotation direction of the connecting component 33. Two sets of spiral rods 434 are provided at both ends of the bottom of the follower gear ring 431. The two sets of spiral rods 434 are placed with a 180-degree rotation. Since the rotation direction of the spiral rods 434 is opposite to the direction of the rotor outer rod 312, the rotation direction of the spiral rods 434 is opposite to the rotation direction of the liquid inlet circulation pipe 341. Furthermore, the spiral rods 434 perform premixing operations on the raw rubber and the filler. At the same time, through the cooperation of the spiral rods 434 and the liquid inlet circulation pipe 341, reverse dragging of the rubber compound can be formed. After the rubber compound generates heat due to strong shearing at the spiral rods 434, the rubber compound is forced into the cooling area of the liquid inlet circulation pipe 341, realizing high-frequency cycles of shearing and cooling, and further realizing pre-dispersion of the raw rubber, silicone oil, and silica. At the same time, it avoids the breakage of the molecular chain of the rubber compound due to long-term retention in the high-temperature area and retains the physical properties of the material. The bottom of the spiral rod 434 is connected with a limiting rod 435. The limiting rod 435 penetrates through the hollow groove 232. The limiting rod 435 is slidably connected inside the limiting groove 234. The limiting groove 234 can limit and guide the rotation of the limiting rod 435 and support the two sets of spiral rods 434 on the limiting rod 435. Among them, the process of the expansion operation of the push rod 356, the cooling of the ethylene glycol circulation component 34, and the cooling of the premixing cylinder 411 in multiple coordinated operations is as follows: During the movement process where the rotation direction of the spiral rod 434 is opposite to the direction of the rotor outer rod 312,The spiral rod 434 rotates in the opposite direction to the push rod 356 to shear and pull the raw rubber and the mixture, and at the same time cooperates with the expansion and contraction operation of the push rod 356 to extrude the raw rubber and the mixture, and release the local high pressure on the raw rubber mixture, the purpose of which is to prevent the volume expansion from causing micro cracks inside the agglomerate. Since the spiral rod 434 is set in a spiral state, and the spiral rod 434 is designed with a large upper diameter and a small lower diameter, there is a gap between the two sets of spiral rods 434. The operation mode of the spiral rotating rod 434 is as follows: when raw rubber and mixed materials are put into the spiral rotating rod 434, the spiral rotating rod 434 is subjected to the gravity of the raw rubber and the thrust of the push rod 356 during the centrifugal movement, and the raw rubber tends to be transported upward, so that the raw rubber first achieves "stress crushing and flow tearing" inside the spiral rotating rod 434, and the high-pressure raw materials are instantly released to contact the cooling surface of the spiral groove 313, so that the raw materials are quickly cooled in a low-pressure environment, which promotes the white carbon black agglomerates to be heated and cooled under the stress gradient. At the same time, due to the gaps between the spiral rotating rods 434, a part of the raw rubber flows to the outside of the spiral rotating rods 434 through the gaps between the two sets of spiral rotating rods 434 under the action of flow tearing and upward centrifugal force, and contacts and squeezes the heat-conducting silica gel heat-dissipating layer on the innermost side of the premixing barrel 411 through the outer wall teeth of the spiral rotating rods 434, so that the raw rubber has a downward extrusion tendency at this time, and then through the low-pressure environment of the premixing barrel 411, the low-pressure environment is quickly cooled and the spiral rotating rod 434 rotates and squeezes, and flows to the lower end through the spiral rotating rod 434 again, and enters the inner lower end of the spiral rotating rod 434 again, thereby forming a closed-loop operation of annular flow, thereby achieving the effect of eliminating the "wall effect" caused by the large temperature difference between the wall and the rotor of traditional equipment, avoiding the rubber material from sticking to the wall and local overheating, making the rubber material in a uniform temperature environment during the entire mixing process, greatly reducing the performance difference of the rubber material caused by temperature fluctuations, and ensuring the stability of product quality; The main mixing mechanism 5 is detachably installed at the lower end of the transition mechanism 2. Through the cooperation of the rotor mechanism 3 and the main mixing mechanism 5, it is used to disperse and shear the rubber paste, filler and vulcanizing agent. The main mixing mechanism 5 includes: a main mixing assembly 51, a main mixing cylinder 511, a trapezoidal plate 512, a discharge tray 513, a rotating groove 514, a vertical shearing gear set 52, a horizontal shearing wheel 53, a rotating assembly 54, a rotating motor 541 and a double gear turntable 542; The main mixing assembly 51 is detachably installed at the bottom of the feeding tray 221, and the main mixing cylinder 511 is detachably installed at the bottom of the feeding tray 221. Trapezoidal plates 512 are provided around the inner wall of the main mixing cylinder 511. The outer walls of the trapezoidal plates 512 are rotatably connected to the vertical shearing gear set 52. A discharge tray 513 is installed at the bottom of the main mixing cylinder 511. Through the discharge tray 513, the kneaded rubber can be discharged. A fixed ring 311 is installed at the upper end of the inner wall of the discharge tray 513. A rotating groove 514 is provided on the outer side of the lower end inside the main mixing cylinder 511. Through the rotating groove 514, the rotation of the rotating assembly 54 can be limited and guided. The vertical shearing gear set 52 is installed around the inner wall of the main mixing assembly 51. A horizontal shearing wheel 53 is provided in the middle of the main mixing assembly 51. The horizontal shearing wheel 53 is connected to the outer wall of the lower end of the rotor outer rod 312. The bottom of the vertical shearing gear set 52 is connected to the top of the rotating assembly 54. Through the drive of the rotating assembly 54, the vertical shearing gear set 52 can be driven to rotate, so that the vertical shearing gear set 52 cooperates with the horizontal shearing wheel 53 to shear the mixture horizontally and vertically. Through the superposition of axial convection and vertical shearing, the rubber forms a three-dimensional vortex flow in the cavity, and its movement trajectory includes circumferential rotation, axial movement and vertical extrusion at the same time, ensuring that each particle experiences multi-directional and variable-intensity shearing effects, and at the same time can improve the efficiency of breaking the silica agglomerates. The rotating motor 541 is installed on one side of the lower end of the outer wall of the main mixing cylinder 511. The output end of the rotating motor 541 is connected to a gear. The lower end of the outer wall of the gear is meshed with the outer teeth of the double gear turntable 542. Through the drive of the rotating motor 541, the double gear turntable 542 can be driven to rotate. The double gear turntable 542 is rotatably connected inside the rotating groove 514. The inner teeth of the double gear turntable 542 are meshed with the bottom of the vertical shearing gear set 52. Through the rotation of the double gear turntable 542, the vertical shearing gear set 52 can be driven to rotate, so that the vertical shearing gear set 52 shears the rubber vertically.

[0018] In specific use, those skilled in the art preheat the raw rubber to room temperature (25°C) in advance, dry fillers such as silica at 120°C for 2 hours until the moisture content is <0.5%, accurately weigh additives such as silicone oil and vulcanizing agent according to the formula, start the premixing mechanism 4, put in the raw rubber, turn on the rotation of the outer rod 312 of the rotor and the spiral rod 434, and slowly add silicone oil and silica at the same time. By using reverse rotation, the preliminary infiltration of the filler is realized to form a uniform premixed rubber paste. By opening the feeding component 22, the premixed rubber paste enters the inside of the air pump nozzle 222, and the premixed rubber paste is quantitatively sprayed into the main mixing chamber through the slit-type air pump nozzle 222. By starting the rotating component 54, the vertical shearing gear set 52 and the horizontal shearing wheel 53 perform vertical and horizontal shearing and mixing. After the filler is evenly dispersed, the vulcanizing agent is added through the top feeding port, and the liquid inlet circulation pipe 341 on the rotor surface is used to promote its uniform dispersion to avoid local overheating. When the mixing is completed, open the cover plate of the bottom discharge tray 513 to discharge the mixed silicone rubber.

[0019] Although the present invention has been described above with reference to the embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention can be combined with each other in any way. The exhaustive description of these combinations is not given in this specification only for the consideration of saving space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. Low temperature silicone rubber compound closed mixing device, including: Bracket (1); The support (1) is placed on the ground, and a transition mechanism (2) is installed at the upper end of the interior of the support (1). The transition mechanism (2) is used to block and transfer the premixed materials. The feature is that a premixing mechanism (4) is detachably installed at the upper end of the transition mechanism (2), and a main mixing mechanism (5) is detachably installed at the lower end of the transition mechanism (2). A rotor mechanism (3) is rotatably connected between the premixing mechanism (4) and the main mixing mechanism (5). The rotor mechanism (3) cooperates with the premixing mechanism (4) to premix raw rubber, silicone oil and white carbon black to form a uniform premixed slurry. The rotor mechanism (3) cooperates with the main mixing mechanism (5) to disperse and shear the slurry, filler and vulcanizing agent. The rotor mechanism (3) comprises: a connecting assembly (33) and an auxiliary assembly (35); the auxiliary assembly (35) comprises: a bidirectional screw (351); the bidirectional screw (351) is rotatably connected to the bottom center of the connecting assembly (33); the bottom of the bidirectional screw (351) is rotatably connected to the top center of a chassis (352); the chassis (352) is installed in the middle of the inner wall of the rotor inner rod (32); a driving motor (353) is installed at the bottom center of the chassis (352); the upper and lower ends of the outer wall of the bidirectional screw (351) are both threadedly connected to a threaded block (354); the outer wall of the threaded block (354) is rotatably connected to a connecting rod (355); the other end of the connecting rod (355) is rotatably connected to the upper end of the inner wall of a push rod (356); and a spring plunger (357) is installed on the outer wall of the push rod (356); The premixing mechanism (4) comprises: a premixing component (41) and a mixing component (43); the premixing component (41) comprises: a mounting groove (414) and an auxiliary gear (417); the mixing component (43) comprises: a follower gear ring (431); a guide block (432) is provided on the outer wall of the follower gear ring (431); the follower gear ring (431) slides into the interior of the mounting groove (414) through the guide block (432); the follower gear ring (431) is rotatably connected to the interior of the guide groove (415) through the guide block (432); The inner wall of the follower gear ring (431) is provided with teeth (433), the teeth (433) are meshedly connected with the outer wall of the auxiliary gear (417), the other end of the outer wall of the auxiliary gear (417) is meshedly connected with the gear ring (332), two groups of spiral rotating rods (434) are provided at both ends of the bottom of the follower gear ring (431), the bottom of the spiral rotating rod (434) is connected with a limiting rod (435), the limiting rod (435) passes through the hollow groove (232), and the limiting rod (435) is slidably connected to the inside of the limiting groove (234).

2. The low-temperature silicone rubber compound closed mixing device according to claim 1, characterized in that: The transition mechanism (2) comprises: a material blocking component (21); The material blocking component (21) is mounted on the inner upper end of the bracket (1); a material discharging component (22) is provided at the bottom of the material blocking component (21); and a limiting component (23) is provided at the top of the material blocking component (21).

3. The low-temperature silicone rubber compound closed mixing device according to claim 2, characterized in that: The material blocking component (21) comprises: a material blocking ring (211); The material blocking ring (211) is installed at the inner upper end of the bracket (1), and the outer wall of the material blocking ring (211) is provided with a pneumatic valve (212); The material discharge assembly (22) comprises: a material discharge tray (221); A material discharge tray (221) is arranged at the bottom of the material blocking ring (211), and an air pump nozzle (222) is installed at the bottom of the material discharge tray (221); The limiting assembly (23) comprises: a limiting plate (231); The limiting plate (231) is arranged on the top of the unloading plate (221), a hollow groove (232) is provided at the inner end of the surface of the limiting plate (231), a limiting groove (234) is provided on the inner side of the hollow groove (232), and a slip ring (233) is rotatably connected between the hollow groove (232) and the limiting groove (234).

4. The low-temperature silicone rubber compound closed mixing device according to claim 3, characterized in that: The rotor mechanism (3) comprises: a rotor assembly (31); The bottom of the rotor assembly (31) is mounted at the lower end inside the main mixing mechanism (5); a rotor inner rod (32) is provided inside the rotor assembly (31); the tops of the rotor assembly (31) and the rotor inner rod (32) are connected to the bottom of a connecting assembly (33); the top of the connecting assembly (33) is connected to the driving end of the premixing mechanism (4); an ethylene glycol circulation assembly (34) is mounted between the rotor assembly (31) and the rotor inner rod (32); and an auxiliary assembly (35) is mounted inside the rotor inner rod (32).

5. The low-temperature silicone rubber compound closed mixing device according to claim 4, characterized in that: The rotor assembly (31) comprises: a fixing ring (311); A fixing ring (311) is mounted on the lower end of the main mixing mechanism (5); the upper end of the fixing ring (311) is rotatably connected to a rotor outer rod (312); a thread groove (313) is provided on the outer wall of the rotor outer rod (312); and circular grooves (314) are provided around the upper end of the outer wall of the rotor outer rod (312); The connection assembly (33) comprises: a connection ring (331); The outer side of the bottom of the connecting ring (331) is connected to the top of the rotor outer rod (312) and the inner side of the rotor inner rod (32); a gear ring (332) is provided at the lower end of the outer wall of the connecting ring (331); a liquid outlet groove (333) is provided on the inner side of the top of the connecting ring (331); the liquid outlet groove (333) is connected to the output end of the ethylene glycol circulation component (34); and a liquid inlet groove (334) is provided on the outer side of the top of the connecting ring (331); the liquid inlet groove (334) is connected to the input end of the ethylene glycol circulation component (34); The ethylene glycol circulation component (34) comprises: a liquid inlet circulation pipe (341); A liquid inlet circulation pipe (341) is installed inside the threaded groove (313); the top of the liquid inlet circulation pipe (341) is connected to the liquid inlet groove (334); a liquid outlet circulation pipe (342) is provided at the inner wall end of the liquid inlet circulation pipe (341); the liquid outlet circulation pipe (342) is installed between the inner wall of the rotor outer rod (312) and the outer wall of the rotor inner rod (32); and the liquid outlet circulation pipe (342) is connected to the liquid outlet groove (333).

6. The low-temperature silicone rubber compound closed mixing device according to claim 5, characterized in that: The premixing mechanism (4) comprises: a premixing component (41); The premixing assembly (41) is detachably mounted on the top of the limiting disk (231), a rotating assembly (42) is detachably mounted on the top of the premixing assembly (41), an output end of the rotating assembly (42) is connected to the top center of the connecting assembly (33), and a mixing assembly (43) is detachably mounted inside the premixing assembly (41).

7. The closed mixing device for low-temperature silicone rubber compound according to claim 6, characterized in that: The premixing assembly (41) further comprises: a premixing cylinder (411); The premixing cylinder (411) is detachably mounted on the top of the limiting plate (231); the lower left end of the premixing cylinder (411) is connected to the circulating water inlet pipe (412); the top right end of the premixing cylinder (411) is connected to the circulating water outlet pipe (413); the inner wall of the premixing cylinder (411) is provided with a mounting groove (414) around the periphery; the upper end of the inner wall of the premixing cylinder (411) is provided with a guide groove (415); the guide groove (415) is communicated with the mounting groove (414); the upper end of the inner wall of the premixing cylinder (411) is provided with a mounting rod (416); the bottom of the mounting rod (416) is rotatably connected to an auxiliary gear (417); The rotating assembly (42) comprises: a feed tray (421); A feed tray (421) is detachably mounted on the top of the premixing barrel (411); the center of the top of the feed tray (421) is connected to a rotating motor (422); the bottom output end of the rotating motor (422) is connected to the top of a connecting assembly (33); an ethylene glycol liquid inlet pipe (423) is provided at the left end of the top of the feed tray (421); the ethylene glycol liquid inlet pipe (423) is connected to a liquid inlet tank (334); and an ethylene glycol liquid outlet pipe (424) is provided at the right end of the top of the feed tray (421); the ethylene glycol liquid outlet pipe (424) is connected to a liquid outlet tank (333).

8. The closed mixing device for low-temperature silicone rubber compound according to claim 7, characterized in that: The main mixing mechanism (5) comprises: a main mixing component (51); The main mixing component (51) is detachably mounted on the bottom of the material discharge tray (221); a vertical shearing gear set (52) is mounted around the inner wall of the main mixing component (51); a transverse shearing wheel (53) is arranged in the middle of the main mixing component (51); the transverse shearing wheel (53) is connected to the lower end of the outer wall of the rotor outer rod (312); and the bottom of the vertical shearing gear set (52) is connected to the top of the rotating component (54).

9. The closed mixing device for low-temperature silicone rubber compound according to claim 8, characterized in that: The main mixing assembly (51) comprises: a main mixing cylinder (511); The main mixing drum (511) is detachably mounted on the bottom of the discharge plate (221); a trapezoidal plate (512) is provided around the inner wall of the main mixing drum (511); the outer wall of the trapezoidal plate (512) is rotatably connected to the vertical shearing gear set (52); a discharge plate (513) is installed at the bottom of the main mixing drum (511); a fixing ring (311) is installed at the upper end of the inner wall of the discharge plate (513); and a rotating groove (514) is provided on the outer side of the lower end of the inner part of the main mixing drum (511); The rotating assembly (54) comprises a rotating motor (541); the rotating motor (541) is mounted on one side of the lower end of the outer wall of the main mixing drum (511); the output end of the rotating motor (541) is connected to a gear; the lower end of the outer wall of the gear is meshed with the outer teeth of a double-gear rotating disk (542); the double-gear rotating disk (542) is rotatably connected to the inside of the rotating groove (514); the inner teeth of the double-gear rotating disk (542) are meshed with the bottom of the vertical shearing gear set (52).

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