Synthesizer of precursor for polyimide film

Abstract

The utility model discloses a synthesis device of a precursor for a polyimide film, and relates to the technical field of synthesis of the precursor for the polyimide film. The reaction kettle is fixedly connected to the top of the temperature control circulating box, and a plurality of supporting rods are fixedly connected to the outer surface of the reaction kettle at equal intervals; the stirring mechanism is arranged in the temperature control circulating box and is used for stirring the raw materials in the reaction kettle. According to the synthesis device of the precursor for the polyimide film, by using the wall scraping spiral sheet, raw materials in the reaction kettle cannot be scraped on the inner wall of the reaction kettle, meanwhile, the spiral shape can enable the raw materials to directly flow into the bottom of the reaction kettle and be conveniently discharged, and the synthesis device of the precursor for the polyimide film is simple in structure and convenient to operate. The temperature control mechanism is used for preserving heat in the reaction kettle, the stirring reaction effect is improved, and meanwhile, the discharging mechanism is used, so that the bottom of the reaction kettle is kept flat, and raw materials in the reaction kettle are completely discharged.

Description

Technical Field

[0001] This utility model relates to the technical field of polyimide film precursor synthesis apparatus, specifically an apparatus for synthesizing polyimide film precursors. Background Technology

[0002] With the development of aviation and aerospace technology, various industries have an urgent need for heat-resistant, high-strength, and lightweight structural materials. Polyimide, whose main chain consists of aromatic rings and heterocyclic rings, has emerged to meet this need. Practice has shown that the relative molecular mass of the precursor has a significant impact on the performance of the final polyimide film. Precursors with low relative molecular mass cannot produce high-performance polyimide films after imidization. Precursors with medium relative molecular mass show a decrease in mechanical properties at the beginning of imidization, reaching their lowest point at 200-250℃. Then, as the temperature increases, the mechanical properties gradually recover, finally reaching the expected level at around 300℃. Precursors with high relative molecular mass maintain high mechanical properties throughout the imidization process.

[0003] The patent application number "CN201862366U" describes "a synthesis apparatus for a precursor of polyimide film, characterized in that: it includes a first reaction vessel for synthesizing a prepolymer solution and a second reaction vessel for adjusting the viscosity of the prepolymer solution; a gear feed pump is provided between the first and second reaction vessels; a dissolving tank is connected to the second reaction vessel via a feed pipe; and a flow meter, regulating valve, and gear feed pump are provided on the feed pipe for controlling the rate at which the reactant solution in the second reaction vessel is added to the dissolving tank." The purpose of this invention is to overcome the shortcomings of the prior art and provide a simple synthesis apparatus for a precursor of polyimide film that can both control the viscosity of the precursor and fully stir high-viscosity precursors.

[0004] The aforementioned patent overcomes the shortcomings of the prior art and provides a simple device for synthesizing polyimide film precursors that can control the viscosity of the precursors and fully stir the high-viscosity precursors. However, during the stirring process, the internal temperature cannot be maintained, and the discharge cannot be controlled. Utility Model Content

[0005] This invention provides a synthesis apparatus for a precursor of polyimide film. By using a wall-scraping spiral blade, the raw materials inside the reactor are not scraped against the inner wall of the reactor. At the same time, the spiral shape allows the raw materials to flow directly into the bottom of the reactor for easy discharge. The temperature control mechanism keeps the inside of the reactor warm, improving the stirring reaction effect. In addition, the use of a discharge mechanism keeps the bottom of the reactor flat, allowing the raw materials inside the reactor to be completely discharged.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for synthesizing a precursor for polyimide films, comprising:

[0007] Temperature-controlled circulation chamber;

[0008] The reactor is fixedly connected to the top of the temperature-controlled circulation box, and multiple support rods are fixedly connected at equal intervals on the outer surface of the reactor.

[0009] The stirring mechanism, located inside the temperature-controlled circulation chamber, is used to stir the raw materials in the reactor.

[0010] The wall-scraping spiral blades are provided in multiple manner, and all of the multiple wall-scraping spiral blades are provided on the stirring mechanism;

[0011] A temperature control mechanism is located inside a temperature control circulation chamber. The temperature control mechanism includes a circulation component and a circulation spiral hole. The circulation spiral hole is located inside the reactor. The circulation component is located inside the temperature control circulation chamber and connected to the circulation spiral hole.

[0012] A discharge mechanism is located at the bottom of the reactor and is used to discharge the raw materials inside the reactor. The discharge mechanism includes a control component, a discharge port, and a discharge pipe. The discharge port is located at the bottom of the reactor, and the reactor is fixedly connected to the bottom of the discharge port. The control component is located inside the discharge pipe.

[0013] Furthermore, the stirring mechanism includes a stirring motor, a rotating shaft, and multiple stirring rods. The rotating shaft is rotatably connected inside the reactor, and the multiple stirring rods are fixedly connected to the rotating shaft at equal intervals. The stirring motor is fixedly connected to the top of the reactor, and the output end of the stirring motor is fixedly connected to the top of the rotating shaft.

[0014] Furthermore, the circulation component includes a circulation pump, an outlet pipe, and a return pipe. The circulation pump is fixedly connected to the temperature-controlled circulation chamber. The outlet pipe is fixedly connected to one side of the outer surface of the reactor. One end of the outlet pipe is connected to the output end of the circulation pump, and the other end of the outlet pipe is connected to one end of the circulation spiral hole. The return pipe is fixedly connected to one side of the outer surface of the reactor. One end of the return pipe is connected to the temperature-controlled circulation chamber, and the other end of the return pipe is connected to one end of the circulation spiral hole.

[0015] Furthermore, the control component includes:

[0016] Protective components are installed inside the discharge pipe; and

[0017] The sealing assembly is located inside the protective assembly and is connected to the discharge port.

[0018] Furthermore, the protective component is a protective sleeve, which is fixedly connected to the center of the discharge pipe.

[0019] Furthermore, the sealing assembly includes a positioning cylinder and a sealing sleeve. The positioning cylinder is fixedly connected inside the protective sleeve, and the sealing sleeve is fixedly connected to the output end of the positioning cylinder, and the sealing sleeve is movably fitted onto the protective sleeve.

[0020] This invention provides an apparatus for synthesizing a precursor for polyimide films. It offers the following advantages:

[0021] (1) The device for synthesizing the precursor of the polyimide film can prevent the raw materials inside the reactor from being scraped on the inner wall of the reactor by using the wall scraping spiral blade. At the same time, the spiral shape can allow the raw materials to flow directly into the bottom of the reactor for easy discharge.

[0022] (2) The device for synthesizing the precursor of the polyimide film uses a temperature control mechanism to keep the inside of the reactor warm, thereby improving the stirring reaction effect. At the same time, the use of a discharge mechanism keeps the bottom of the reactor flat, allowing the raw materials in the reactor to be completely discharged. Attached Figure Description

[0023] Figure 1 This is an exploded cross-sectional view of the present invention;

[0024] Figure 2 This is a partial sectional view of the present invention;

[0025] Figure 3 This is a perspective view of the present utility model;

[0026] Figure 4 This is an exploded cross-sectional view of the material discharge mechanism of this utility model.

[0027] In the diagram: 1. Temperature-controlled circulation box; 2. Circulation pump; 3. Sealing sleeve; 4. Position control cylinder; 5. Discharge pipe; 6. Protective sleeve; 7. Discharge port; 8. Support rod; 9. Wall scraping spiral blade; 10. Reactor; 11. Stirring rod; 12. Rotating shaft; 13. Circulation spiral hole; 14. Stirring motor; 15. Liquid outlet pipe; 16. Liquid return pipe. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] Please see Figure 1-4This utility model provides a technical solution: a device for synthesizing a precursor for polyimide films, comprising:

[0030] Temperature control circulation chamber 1;

[0031] The reactor 10 is fixedly connected to the top of the temperature control circulation box 1, and multiple support rods 8 are fixedly connected at equal intervals on the outer surface of the reactor 10.

[0032] The stirring mechanism is located in the temperature-controlled circulation box 1 and is used to stir the raw materials in the reaction vessel 10;

[0033] Multiple wall-scraping spiral blades 9 are provided, and all multiple wall-scraping spiral blades 9 are provided on the stirring mechanism;

[0034] A temperature control mechanism is located inside the temperature control circulation chamber 1. The temperature control mechanism includes a circulation component and a circulation spiral hole 13. The circulation spiral hole 13 is opened inside the reactor 10. The circulation component is located inside the temperature control circulation chamber 1 and is connected to the circulation spiral hole 13.

[0035] The discharge mechanism is located at the bottom of the reactor 10 and is used to discharge the raw materials inside the reactor 10. The discharge mechanism includes a control component, a discharge port 7 and a discharge pipe 5. The discharge port 7 is located at the bottom of the reactor 10 and the reactor 10 is fixedly connected to the bottom of the discharge port 7. The control component is located inside the discharge pipe 5.

[0036] In this implementation scheme: the reactor 10 is an application of existing technology, which will not be elaborated on here. The raw materials are processed through the reactor 10. According to the synthesis device for a precursor of polyimide film described in the authorized publication number CN201862366U, the reactor 10 is a second reactor. The raw materials inside the reactor 10 are scraped off the inner wall of the reactor 10 by the wall scraping spiral blade 9. At the same time, the spiral shape allows the raw materials to flow directly into the bottom of the reactor 10 for easy discharge. The circulating spiral hole 13 completely surrounds the reactor 10 to complete the internal temperature control. The discharge port 7 and the discharge pipe 5 facilitate the discharge of the raw materials in the reactor 10. The temperature control circulation box 1 can control the temperature of the internal liquid.

[0037] Specifically, the stirring mechanism includes a stirring motor 14, a rotating shaft 12, and multiple stirring rods 11. The rotating shaft 12 is rotatably connected inside the reactor 10, and the multiple stirring rods 11 are fixedly connected to the rotating shaft 12 at equal intervals. The stirring motor 14 is fixedly connected to the top of the reactor 10, and the output end of the stirring motor 14 is fixedly connected to the top of the rotating shaft 12.

[0038] In this embodiment, the model of the stirring motor 14 can be selected from those available on the market as needed, which will not be elaborated here. The stirring motor 14 controls the rotating shaft 12 to rotate, and multiple stirring rods 11 rotate synchronously to achieve the stirring of raw materials.

[0039] Specifically, the circulation components include a circulation pump 2, an outlet pipe 15, and a return pipe 16. The circulation pump 2 is fixedly connected to the temperature-controlled circulation chamber 1. The outlet pipe 15 is fixedly connected to one side of the outer surface of the reactor 10. One end of the outlet pipe 15 is connected to the output end of the circulation pump 2, and the other end of the outlet pipe 15 is connected to one end of the circulation spiral hole 13. The return pipe 16 is fixedly connected to one side of the outer surface of the reactor 10. One end of the return pipe 16 is connected to the temperature-controlled circulation chamber 1, and the other end of the return pipe 16 is connected to one end of the circulation spiral hole 13.

[0040] In this embodiment, the model of the circulating pump 2 can be selected from those available on the market as needed, which will not be elaborated here. The circulating pump 2 circulates the liquid with temperature in the temperature-controlled circulating box 1 to achieve internal temperature control of the reactor 10.

[0041] Specifically, the control components include:

[0042] Protective components are installed inside the discharge pipe 5; and

[0043] A sealing assembly is located inside the protective assembly and is connected to the discharge port 7.

[0044] In this embodiment: the protective component ensures that the sealing component is not affected by the raw materials during use.

[0045] Specifically, the protective component is a protective sleeve 6, which is fixedly connected to the center of the discharge pipe 5.

[0046] In this embodiment: the protective sleeve 6 partially wraps the sealing component, thus completing its use.

[0047] Specifically, the sealing assembly includes a control cylinder 4 and a sealing sleeve 3. The control cylinder 4 is fixedly connected inside the protective sleeve 6, and the sealing sleeve 3 is fixedly connected to the output end of the control cylinder 4, and the sealing sleeve 3 is movably fitted onto the protective sleeve 6.

[0048] In this embodiment, the model of the position control cylinder 4 can be selected from those available on the market as needed, which will not be elaborated here. By extending and retracting the position control cylinder 4, the lifting and lowering of the cover 3 on the protective cover 6 is controlled, thus completing the use.

[0049] During use, ensure the outlet 7 is sealed, and put the raw materials into the reactor 10. The rotating shaft 12 is controlled by the stirring motor 14 to rotate, driving multiple stirring rods 11 and multiple wall scraping spiral blades 9 to rotate, thus completing the stirring and realizing reaction control. During the reaction, the circulation pump 2 draws the liquid in the temperature-controlled circulation tank 1 into the circulation spiral hole 13 through the liquid outlet pipe 15. After circulation, the liquid returns to the temperature-controlled circulation tank 1 through the liquid return pipe 16 to complete the circulation and ensure the temperature control in the reactor 10. After the reaction is completed, the position control cylinder 4 retracts, allowing the internal raw materials to be discharged through the outlet 7, thus completing the use.

[0050] The control method of this utility model is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0051] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An apparatus for synthesizing a precursor for polyimide films, characterized in that, include: Temperature control circulation chamber (1); The reactor (10) is fixedly connected to the top of the temperature control circulation box (1), and multiple support rods (8) are fixedly connected at equal intervals on the outer surface of the reactor (10). The stirring mechanism is located in the temperature-controlled circulation box (1) and is used to stir the raw materials in the reactor (10); Multiple wall-scraping spiral blades (9) are provided, and all of the multiple wall-scraping spiral blades (9) are provided on the stirring mechanism; A temperature control mechanism is located inside a temperature control circulation chamber (1). The temperature control mechanism includes a circulation component and a circulation spiral hole (13). The circulation spiral hole (13) is opened inside the reactor (10). The circulation component is located inside the temperature control circulation chamber (1) and is connected to the circulation spiral hole (13). The discharge mechanism is located at the bottom of the reactor (10) and is used to discharge the raw materials in the reactor (10). The discharge mechanism includes a control component, a discharge port (7) and a discharge pipe (5). The discharge port (7) is located at the bottom of the reactor (10). The reactor (10) is fixedly connected to the bottom of the discharge port (7). The control component is located inside the discharge pipe (5).

2. The apparatus for synthesizing a precursor for polyimide films according to claim 1, characterized in that, The stirring mechanism includes a stirring motor (14), a rotating shaft (12), and multiple stirring rods (11). The rotating shaft (12) is rotatably connected inside the reactor (10). The multiple stirring rods (11) are fixedly connected to the rotating shaft (12) at equal intervals. The stirring motor (14) is fixedly connected to the top of the reactor (10), and the output end of the stirring motor (14) is fixedly connected to the top of the rotating shaft (12).

3. The apparatus for synthesizing a precursor for polyimide films according to claim 2, characterized in that, The circulation components include a circulation pump (2), an outlet pipe (15), and a return pipe (16). The circulation pump (2) is fixedly connected to the temperature-controlled circulation box (1). The outlet pipe (15) is fixedly connected to one side of the outer surface of the reactor (10). One end of the outlet pipe (15) is connected to the output end of the circulation pump (2), and the other end of the outlet pipe (15) is connected to one end of the circulation spiral hole (13). The return pipe (16) is fixedly connected to one side of the outer surface of the reactor (10). One end of the return pipe (16) is connected to the temperature-controlled circulation box (1), and the other end of the return pipe (16) is connected to one end of the circulation spiral hole (13).

4. The apparatus for synthesizing a precursor for polyimide films according to claim 3, characterized in that, The control component includes: Protective components are installed inside the discharge pipe (5); and The sealing assembly is located inside the protective assembly and is connected to the discharge port (7).

5. The apparatus for synthesizing a precursor for polyimide films according to claim 4, characterized in that, The protective component is a protective sleeve (6), which is fixedly connected to the center of the discharge pipe (5).

6. The apparatus for synthesizing a precursor for polyimide films according to claim 5, characterized in that, The sealing assembly includes a positioning cylinder (4) and a sealing sleeve (3). The positioning cylinder (4) is fixedly connected inside the protective sleeve (6), and the sealing sleeve (3) is fixedly connected to the output end of the positioning cylinder (4), and the sealing sleeve (3) is movably fitted onto the protective sleeve (6).

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