Apparatus for producing high viscosity polysiloxane

Abstract

The utility model discloses a kind of high-viscosity polysiloxane preparation equipment, including support frame, polymerization mechanism, premixing mechanism and termination vacuum discharge mechanism, polymerization mechanism includes protective connection frame, main extrusion screw and double extrusion screw, double extrusion screw is symmetrically arranged in the both sides of main extrusion screw. Transmission assembly is fixed in the inside of protective connection frame, main extrusion screw and double extrusion screw one end are fixedly connected in transmission assembly, main extrusion screw and double extrusion screw other end rotatably connect with rotating connecting plate, rotating connecting plate is fixedly connected with external protection barrel, external protection barrel one side is fixedly connected with fixed plate, fixed plate is slidably connected with feed control board, feed control board top two sides rotatably connect with regulator. Compared with prior art, the collaborative rotation of main extrusion screw and double extrusion screw can efficiently extrude and mix high-viscosity material, can effectively break the material agglomeration state, realize uniform mixing of material in polymerization reaction process.

Description

Technical Field

[0001] This utility model relates to the field of chemical production equipment technology, and in particular to a device for producing high-viscosity polysiloxane. Background Technology

[0002] High-viscosity polysiloxanes have a wide range of applications in many fields. For example, in plastic processing and molding, they can significantly improve the processability and flowability of plastics, and enhance the wear resistance and scratch resistance of plastic products. In the cosmetics field, they can be used to improve the texture and stability of products. In precision machinery and instruments, they can be used as shockproof and damping materials.

[0003] High-viscosity polysiloxanes are often synthesized using a catalytic equilibrium process, with the equipment being a polymerization reactor. To obtain ultra-high viscosity polysiloxanes, production typically involves extending the polymerization and depolymerization times. After the reaction, 12-15% of volatile organic compounds (VOCs) such as octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5), and dodecylcyclohexasiloxane (D6) are present and need to be removed. This preparation method has the following drawbacks: 1) It requires a high-performance stirring system; as the polymer viscosity increases, the flowability decreases, leading to insufficient stirring, causing localized overheating, cross-linking, or yellowing. 2) The high viscosity makes unloading difficult. 3) The product has a high volatile content, typically 1-3%.

[0004] Patent CN103435808A discloses a production method and system for continuous production of 107 glue using a twin-screw extruder, but does not provide the specific structure of the production system. Utility Model Content

[0005] To address the problems of insufficient mixing, localized overheating, cross-linking, or yellowing in existing technologies, this invention provides a device for producing high-viscosity polysiloxanes.

[0006] To achieve this technical objective, the present invention adopts the following solution: A device for producing high-viscosity polysiloxane includes a support frame, a polymerization reaction mechanism, a premixing mechanism, and a vacuum termination discharge mechanism. The support frame is fixedly connected to the bottom of the premixing mechanism and the vacuum termination discharge mechanism. The polymerization reaction mechanism is disposed between the premixing mechanism and the vacuum termination discharge mechanism. The polymerization reaction mechanism includes a protective connecting frame fixedly connected to the outer surface of the vacuum termination discharge mechanism.

[0007] The polymerization reaction mechanism includes a main extrusion screw and twin extrusion screws, which are symmetrically arranged on both sides of the main extrusion screw.

[0008] The protective connecting frame has a transmission component fixed inside. One end of the main extrusion screw and the double extrusion screw is fixedly connected to the outer surface of the transmission component. The other end of the main extrusion screw and the double extrusion screw is rotatably connected to a rotating connecting plate. An external protective barrel is fixedly connected to the outer surface of the rotating connecting plate. A fixing plate is threadedly connected to one side of the external protective barrel. A feeding control plate is slidably connected inside the fixing plate. Adjusters are rotatably connected to both sides of the top of the feeding control plate.

[0009] Furthermore, the transmission assembly is fixedly connected to one side of the outer protective barrel, and the rotating connecting plate is fixedly connected to the other side of the outer protective barrel. The transmission assembly includes a hollow connecting plate fixedly connected to the inner wall of the protective connecting frame. A motor protective box is fixedly connected to the outer surface of the hollow connecting plate. A first motor is fixedly connected inside the motor protective box. A main rotating gear is fixedly connected to the output end of the first motor. A main extrusion screw is fixedly connected to the outer surface of the main rotating gear. Driven rotating gears are rotatably connected to both sides of the main rotating gear. Double extrusion screws are fixedly connected to the outer surface of the driven rotating gears.

[0010] Furthermore, the premixing mechanism and the vacuum discharge termination mechanism are symmetrically arranged at both ends of the polymerization reaction mechanism. The premixing mechanism includes a mixing frame fixedly connected to the outer surface of the fixed plate. A second motor is fixedly connected to the outer surface of the mixing frame. A mixing spiral plate is fixedly connected to the output end of the second motor. A rotating bearing is rotatably connected to the outer surface of the mixing spiral plate. A feed connecting plate is fixedly connected to the outer surface of the rotating bearing.

[0011] Furthermore, the premixing mechanism includes a feed inlet fixedly connected to the top of the mixing frame, a support plate fixedly connected to the outer surface of the feed inlet, an adjuster threadedly connected to both sides of the support plate, and a support frame fixedly connected to the bottom of the mixing frame.

[0012] Furthermore, the vacuum discharge termination mechanism includes a vacuum frame threaded to the outer surface of the protective connecting frame, a vacuum adsorption component fixedly connected to the outer surface of the vacuum frame, and another support frame fixedly connected to the bottom of the vacuum frame.

[0013] Furthermore, the vacuum adsorption assembly includes a support plate fixedly connected to one side of the vacuum frame, a vacuum adsorption machine fixedly connected to the top of the support plate, a vacuum adsorption tube fixedly connected to the outer surface of the vacuum adsorption machine, the far end of the vacuum adsorption tube fixedly connected to the inside of the vacuum frame, and a sealing gasket snapped into the gap between the vacuum adsorption tube and the vacuum frame.

[0014] Furthermore, a discharge pipe is fixedly connected to the other side of the vacuum frame, and discharge control valves are fixedly connected to both sides of the discharge pipe.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, through the configuration of a main extrusion screw, twin extrusion screws, and a feed control plate, enables efficient extrusion and mixing of high-viscosity materials through the coordinated rotation of the main extrusion screw and twin extrusion screws. This effectively breaks up material agglomeration, achieving uniform mixing of materials during the polymerization reaction process. It avoids local overheating, cross-linking, or yellowing caused by insufficient mixing in traditional equipment, significantly improving product quality stability and making the material mix more uniform and the reaction more complete. At the same time, by adjusting the feed control plate, the speed and flow rate of the raw materials entering the polymerization reaction mechanism can be precisely adjusted to ensure the stability of the reaction process.

[0016] 2. This utility model, through the setting of a vacuum adsorption tube, sealing gasket, and discharge control valve, terminates the vacuum adsorption component in the vacuum discharge mechanism. The vacuum adsorption tube is tightly connected to the vacuum frame, and with the efficient sealing effect of the sealing gasket, a stable high vacuum environment can be formed in the vacuum frame. When the material after polymerization reaction enters the vacuum frame, under high vacuum conditions, the volatile organic compounds in the material can be fully extracted, resulting in a significant reduction in the volatile content of the final product. The discharge control valve can flexibly control the discharge speed and flow rate, facilitating the control of the production process, and ultimately obtaining a low-volatile, high-quality, high-viscosity polysiloxane product. Attached Figure Description

[0017] Figure 1 This invention provides a three-dimensional structural diagram of an apparatus for producing high-viscosity polysiloxane.

[0018] Figure 2 This invention provides a schematic diagram of the main extrusion screw in an apparatus for producing high-viscosity polysiloxane.

[0019] Figure 3 This utility model proposes an apparatus for producing high-viscosity polysiloxane. Figure 2 Enlarged diagram of point A.

[0020] Figure 4 This invention provides a schematic diagram of the structure of a mixing spiral plate in an apparatus for producing high-viscosity polysiloxane.

[0021] Figure 5 This invention provides a schematic diagram of the structure of a rotating bearing in an apparatus for producing high-viscosity polysiloxane.

[0022] Figure 6 This utility model proposes an apparatus for producing high-viscosity polysiloxane. Figure 5 Enlarged diagram of point B.

[0023] The components in the diagram are labeled as follows: 1. Support frame; 2. Polymerization reaction mechanism; 21. Protective connecting frame; 22. Main extrusion screw; 23. Dual extrusion screw; 24. Transmission assembly; 241. Hollow connecting plate; 242. Motor protective box; 243. First motor; 244. Main rotating gear; 245. Driven rotating gear; 25. Rotating connecting plate; 26. External protective barrel; 27. Fixing plate; 28. Feed control plate; 29. ​​Regulator; 3. Premixing mechanism; 31. Mixing frame; 32. Second motor; 33. Mixing spiral plate; 34. Rotating bearing; 35. Feed connecting plate; 36. Feed inlet; 37. Support plate; 4. Termination vacuum discharge mechanism; 41. Vacuum frame; 42. Vacuum adsorption assembly; 421. Support plate; 422. Vacuum adsorption machine; 423. Vacuum adsorption tube; 424. Sealing gasket; 43. Discharge pipe; 44. Discharge control valve. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0025] Please see Figures 1 to 6 This utility model provides a technical solution: a device for producing high-viscosity polysiloxane, including a support frame 1, a polymerization reaction mechanism 2, a premixing mechanism 3, and a vacuum termination discharge mechanism 4. The support frame 1 is fixedly connected to the bottom of the premixing mechanism 3 and the vacuum termination discharge mechanism 4. The polymerization reaction mechanism 2 is disposed between the premixing mechanism 3 and the vacuum termination discharge mechanism 4. The polymerization reaction mechanism 2 includes a protective connecting frame 21 fixedly connected to the outer surface of the vacuum termination discharge mechanism 4.

[0026] In this embodiment: the polymerization reaction mechanism 2 includes a main extrusion screw 22 and a twin extrusion screw 23, with the twin extrusion screws 23 symmetrically arranged on both sides of the main extrusion screw 22.

[0027] A transmission assembly 24 is fixed inside the protective connecting frame 21. One end of the main extrusion screw 22 and the double extrusion screw 23 are fixedly connected to the outer surface of the transmission assembly 24. The other end of the main extrusion screw 22 and the double extrusion screw 23 are rotatably connected to a rotating connecting plate 25. An outer protective barrel 26 is fixedly connected to the outer surface of the rotating connecting plate 25. A fixing plate 27 is threadedly connected to one side of the outer protective barrel 26. A feeding control plate 28 is slidably connected inside the fixing plate 27. Adjusters 29 are rotatably connected to both sides of the top of the feeding control plate 28.

[0028] The effects achieved by the above components are as follows: the main extrusion screw 22 and the symmetrical double extrusion screws 23 on both sides work together to form multi-directional extrusion and shearing forces on the incoming material, which greatly improves the mixing effect of high viscosity materials and ensures that the polymerization reaction is uniform and sufficient. The rotating connecting plate 25 provides stable support for the screw and ensures its smooth rotation. The external protective barrel 26 can effectively protect the internal screw and other components from the influence of the external environment and extend their service life. The fixing plate 27 works with the feed control plate 28 and the regulator 29 to accurately control the feed amount and feed speed, ensuring the stable progress of the polymerization reaction.

[0029] Specifically, the transmission assembly 24 is fixedly connected to one side inside the outer protective barrel 26, and the rotating connecting plate 25 is fixedly connected to the other side inside the outer protective barrel 26. The transmission assembly 24 includes a hollow connecting plate 241 fixedly connected to the inner wall of the protective connecting frame 21. A motor protective box 242 is fixedly connected to the outer surface of the hollow connecting plate 241. A first motor 243 is fixedly connected inside the motor protective box 242. A main rotating gear 244 is fixedly connected to the output end of the first motor 243. A main extrusion screw 22 is fixedly connected to the outer surface of the main rotating gear 244. A driven rotating gear 245 is rotatably connected to both sides of the main rotating gear 244. A double extrusion screw 23 is fixedly connected to the outer surface of the driven rotating gear 245.

[0030] The effects achieved by the above components are as follows: the hollow connecting plate 241 provides a stable mounting base for the transmission component 24; the motor protection box 242 can effectively protect the first motor 243 from damage caused by dust, water vapor, etc., and ensure stable operation of the motor; the first motor 243 drives the driven gear 245 to rotate through the main rotating gear 244, realizing the synchronous rotation of the main extrusion screw 22 and the double extrusion screw 23, and has high transmission efficiency and good stability, ensuring that the screw extrusion and stirring effect on the material is consistent, and improving the uniformity and stability of the polymerization reaction.

[0031] Specifically, the premixing mechanism 3 and the vacuum discharge termination mechanism 4 are symmetrically arranged at both ends of the polymerization reaction mechanism 2. The premixing mechanism 3 includes a mixing frame 31 fixedly connected to the outer surface of the fixed plate 27. A second motor 32 is fixedly connected to the outer surface of the mixing frame 31. A mixing spiral plate 33 is fixedly connected to the output end of the second motor 32. A rotating bearing 34 is rotatably connected to the outer surface of the mixing spiral plate 33. A feed connecting plate 35 is fixedly connected to the outer surface of the rotating bearing 34.

[0032] The effects achieved by the above components are as follows: the mixing frame 31 provides a closed space for premixing raw materials; the second motor 32 drives the mixing spiral plate 33 to rotate, which can fully stir and mix the various raw materials that enter; the rotating bearing 34 ensures that the mixing spiral plate 33 rotates flexibly, reduces frictional resistance, and reduces energy consumption; the feed connection plate 35 facilitates connection with external raw material conveying devices, ensuring that the raw materials smoothly enter the premixing mechanism 3; and the premixed raw materials can stably enter the polymerization reaction mechanism 2, laying the foundation for the full progress of the subsequent polymerization reaction.

[0033] Specifically, the premixing mechanism 3 includes a feed inlet 36 fixedly connected to the top of the mixing frame 31, a support plate 37 fixedly connected to the outer surface of the feed inlet 36, an adjuster 29 threadedly connected to both sides of the support plate 37, and a support frame 1 fixedly connected to the bottom of the mixing frame 31.

[0034] The effects achieved by the above components are as follows: the feed inlet 36 facilitates the entry of various raw materials into the premixing mechanism 3 separately or simultaneously; the support plate 37 provides an installation support point for the regulator 29; by rotating the regulator 29, the feed control plate 28 can be driven to slide, thereby precisely adjusting the speed and flow rate of the raw materials entering the polymerization reaction mechanism 2 to adapt to different reaction requirements; the support frame 1 provides stable support for the premixing mechanism 3, ensuring that it will not shake during operation and improving the overall stability of the equipment.

[0035] Specifically, the vacuum discharge termination mechanism 4 includes a vacuum frame 41 threadedly connected to the outer surface of the protective connecting frame 21, a vacuum adsorption assembly 42 fixedly connected to the outer surface of the vacuum frame 41, and another support frame 1 fixedly connected to the bottom of the vacuum frame 41.

[0036] The effects achieved by the above components are as follows: the vacuum frame 41 provides a space for the devolatilization and temporary storage of the material after the polymerization reaction, and the threaded connection with the protective connecting frame 21 facilitates installation and disassembly, and makes it convenient for later maintenance and cleaning. The vacuum adsorption component 42 can form a vacuum environment in the vacuum frame 41, effectively removing volatiles from the material. The support frame 1 provides stable support for the vacuum frame 41, ensuring that the connection between the termination vacuum discharge mechanism 4 and the polymerization reaction mechanism 2 is stable, and ensuring the smooth transportation and processing of the material.

[0037] Specifically, the vacuum adsorption assembly 42 includes a support plate 421 fixedly connected to one side of the vacuum frame 41, a vacuum adsorption machine 422 fixedly connected to the top of the support plate 421, a vacuum adsorption tube 423 fixedly connected to the outer surface of the vacuum adsorption machine 422, a far end of the vacuum adsorption tube 423 fixedly connected to the inside of the vacuum frame 41, and a sealing gasket 424 snapped into the gap between the vacuum adsorption tube 423 and the vacuum frame 41.

[0038] The effects achieved by the above components are as follows: the support plate 421 provides a stable installation platform for the vacuum adsorption machine 422; the vacuum adsorption machine 422 extracts air and volatiles from the vacuum frame 41 through the vacuum adsorption tube 423 to form a high vacuum environment, which promotes the removal of volatiles from the material; the sealing gasket 424 can effectively seal the connection gap between the vacuum adsorption tube 423 and the vacuum frame 41, prevent air from entering the vacuum frame 41, ensure the stability of the vacuum environment, improve the devolatification effect, and significantly reduce the volatile content of the product.

[0039] Specifically, a discharge pipe 43 is fixedly connected to the other side of the vacuum frame 41, and discharge control valves 44 are fixedly connected to both sides of the discharge pipe 43.

[0040] The effects achieved by the above components are as follows: the discharge pipe 43 provides a discharge channel for the processed high-viscosity polysiloxane product; the discharge control valve 44 can flexibly adjust the discharge speed and flow rate, control the product output according to production needs, and avoid affecting subsequent processing due to excessively fast or slow discharge. At the same time, when the valve is closed, it can ensure the sealing of the vacuum frame 41 and ensure that the devolatilization process proceeds normally.

[0041] Working principle: First, the raw materials enter the mixing frame 31 through the feed port 36 of the premixing mechanism 3. The second motor 32 drives the mixing spiral plate 33 to rotate, which fully premixes the raw materials. The rotating bearing 34 reduces the friction when the mixing spiral plate 33 rotates. The premixed raw materials are conveyed to the fixed plate 27 through the feed connecting plate 35. The speed and flow rate of the raw materials entering the polymerization reaction mechanism 2 are controlled by adjusting the regulator 29 on the top of the feed control plate 28.

[0042] In the polymerization reaction mechanism 2, the first motor 243 drives the driven gear 245 to rotate through the main rotating gear 244, so that the main extrusion screw 22 and the double extrusion screw 23 rotate synchronously, extruding, shearing and stirring the incoming raw materials to promote the full progress of the polymerization reaction. The rotating connecting plate 25 ensures the stable rotation of the screws, and the external protective barrel 26 protects the internal components.

[0043] After polymerization, the material enters the vacuum frame 41 of the termination vacuum discharge mechanism 4. The vacuum adsorption unit 422 of the vacuum adsorption component 42 draws a high vacuum into the vacuum frame 41 through the vacuum adsorption tube 423. The sealing gasket 424 ensures the vacuum environment, under which the volatiles in the material are effectively removed.

[0044] Finally, the qualified high-viscosity polysiloxane product is discharged through the discharge pipe 43. The operator can adjust the discharge speed and flow rate through the discharge control valve 44. The support frame 1 provides stable support for the entire equipment, ensuring that all mechanisms work together efficiently.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. If these modifications and variations fall within the scope of the claims of this utility model and their equivalents, they should be considered to be within the protection scope of this utility model.

Claims

1. An apparatus for producing high-viscosity polysiloxane, comprising a support frame (1), a polymerization reaction mechanism (2), a premixing mechanism (3), and a vacuum discharge termination mechanism (4), characterized in that, The support frame (1) is fixedly connected to the bottom of the premixing mechanism (3) and the termination vacuum discharge mechanism (4). The polymerization reaction mechanism (2) includes a protective connecting frame (21), a main extrusion screw (22) and a double extrusion screw (23). The double extrusion screw (23) is symmetrically arranged on both sides of the main extrusion screw (22). The protective connecting frame (21) is fixedly connected to the outer surface of the termination vacuum discharge mechanism (4). The transmission assembly (24) is fixed inside the protective connecting frame (21). One end of the main extrusion screw (22) and the double extrusion screw (23) is fixedly connected to the outer surface of the transmission assembly (24). The other end of the main extrusion screw (22) and the double extrusion screw (23) is rotatably connected to the rotating connecting plate (25). The outer surface of the rotating connecting plate (25) is fixedly connected to the outer protective barrel (26). One side of the outer protective barrel (26) is threadedly connected to the fixing plate (27). The inside of the fixing plate (27) is slidably connected to the feed control plate (28). The top two sides of the feed control plate (28) are rotatably connected to the regulator (29).

2. The equipment for producing high-viscosity polysiloxane according to claim 1, characterized in that, The transmission assembly (24) is fixedly connected to one side inside the outer protective barrel (26), and the rotating connecting plate (25) is fixedly connected to the other side inside the outer protective barrel (26). The transmission assembly (24) includes a hollow connecting plate (241) fixedly connected to the inner wall of the protective connecting frame (21). A motor protective box (242) is fixedly connected to the outer surface of the hollow connecting plate (241). A first motor (243) is fixedly connected inside the motor protective box (242). A main rotating gear (244) is fixedly connected to the output end of the first motor (243). A main extrusion screw (22) is fixedly connected to the outer surface of the main rotating gear (244). A driven rotating gear (245) is rotatably connected to both sides of the main rotating gear (244). A double extrusion screw (23) is fixedly connected to the outer surface of the driven rotating gear (245).

3. The equipment for producing high-viscosity polysiloxane according to claim 1, characterized in that, The premixing mechanism (3) and the vacuum discharge mechanism (4) are symmetrically arranged at both ends of the polymerization reaction mechanism (2). The premixing mechanism (3) includes a mixing frame (31) fixedly connected to the outer surface of the fixed plate (27). A second motor (32) is fixedly connected to the outer surface of the mixing frame (31). A mixing spiral plate (33) is fixedly connected to the output end of the second motor (32). A rotating bearing (34) is rotatably connected to the outer surface of the mixing spiral plate (33). A feed connecting plate (35) is fixedly connected to the outer surface of the rotating bearing (34).

4. The equipment for producing high-viscosity polysiloxane according to claim 3, characterized in that, The premixing mechanism (3) includes a feed inlet (36) fixedly connected to the top of the mixing frame (31), a support plate (37) fixedly connected to the outer surface of the feed inlet (36), an adjuster (29) threadedly connected to both sides of the support plate (37), and a support frame (1) fixedly connected to the bottom of the mixing frame (31).

5. The apparatus for producing high-viscosity polysiloxane according to claim 1, characterized in that, The vacuum discharge mechanism (4) includes a vacuum frame (41) threaded to the outer surface of the protective connecting frame (21), a vacuum adsorption assembly (42) fixedly connected to the outer surface of the vacuum frame (41), and another support frame (1) fixedly connected to the bottom of the vacuum frame (41).

6. The apparatus for producing high-viscosity polysiloxane according to claim 5, characterized in that, The vacuum adsorption assembly (42) includes a support plate (421) fixedly connected to one side of the vacuum frame (41), a vacuum adsorption machine (422) fixedly connected to the top of the support plate (421), a vacuum adsorption tube (423) fixedly connected to the outer surface of the vacuum adsorption machine (422), the far end of the vacuum adsorption tube (423) fixedly connected to the inside of the vacuum frame (41), and a sealing gasket (424) snapped into the gap between the vacuum adsorption tube (423) and the vacuum frame (41).

7. The apparatus for producing high-viscosity polysiloxane according to claim 6, characterized in that, A discharge pipe (43) is fixedly connected to the other side of the vacuum frame (41), and discharge control valves (44) are fixedly connected to both sides of the discharge pipe (43).

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