Polyimide spinning equipment adopting dry-jet wet spinning method

Abstract

The utility model relates to the technical field of polyimide manufacturing, in particular to polyimide dry-jet wet spinning equipment which comprises a coagulating bath tank, a mounting frame a, a support, a heating box, an automatic temperature control heating pipe, a gas conveying piece, a mounting frame b and a connecting base. A filter screen is connected inside the coagulating bath tank, a mounting frame a is connected above the coagulating bath tank, the mounting frame a is connected with a bracket, a gas conveying piece is connected above the bracket, the gas conveying piece is connected with a heating box, and the heating box is connected with an automatic temperature control heating pipe; the gas conveying piece is connected to the coagulating bath tank through a mounting frame b; the connecting seats are connected to two ends of the coagulating bath tank; the connecting base is connected with the steering piece. The two ends of the coagulating bath tank are connected with the connecting base, the connecting base is connected with the steering piece, the steering piece can be conveniently adjusted according to the conveying tension degree of the polyimide precursors, the unevenness condition in the polyimide precursor conveying process is avoided, the dry-jet wet spinning quality of the polyimide precursors is conveniently improved, and the practicability of spinning equipment is improved.

Description

Technical Field

[0001] This utility model relates to the field of polyimide manufacturing technology, and in particular to a polyimide dry-jet wet spinning equipment. Background Technology

[0002] Polyimide, as a special engineering material, has been widely used in aerospace, microelectronics, nanotechnology, liquid crystals, separation membranes, lasers, and other fields. Dry-jet wet spinning is a spinning method that gradually developed in the 1960s and has wide applications in the chemical fiber industry.

[0003] Chinese Patent No. CN214881954U discloses a dry-jet wet spinning equipment for carbon fiber precursor, including a frame, a spinneret and a coagulation bath located below the spinneret, a gas source, and a gas supply pipe connected to the gas source for gas flow. A filter, a dryer, and a nozzle are arranged sequentially along the gas flow direction on the gas supply pipe. The gas ejected from the nozzle passes through the air layer between the spinneret and the coagulation bath to remove excess vapor volatilized from the coagulation bath and spinning solution. This invention, by introducing clean, dry gas at a certain temperature into the air layer between the spinneret and the coagulation bath, removes the vapor volatilized from the coagulation bath and spinning solution, thereby inhibiting its condensation on the spinneret surface, thus preventing fiber breakage and fuzzing, and improving the quality of the precursor fiber.

[0004] In existing dry-jet wet spinning equipment, the tension of polyimide precursor fibers is not easily adjusted in the coagulation bath, resulting in unevenness during the conveying process and affecting the quality of dry-jet wet spinning. At the same time, impurities fall into the coagulation bath during use, which makes it difficult to filter the liquid in the coagulation bath, resulting in poor liquid recovery and reducing the practicality of the spinning equipment. Utility Model Content

[0005] To address the problems existing in the background technology, a polyimide dry-jet wet spinning equipment is proposed.

[0006] This utility model proposes a polyimide dry-jet wet spinning spinning equipment, including: a coagulation bath, a mounting frame a, a bracket, a heating box, an automatic temperature-controlled heating tube, a gas conveying component, a mounting frame b, and a connecting seat;

[0007] The coagulation bath is internally connected to a filter screen and above it is connected to a mounting frame a. Mounting frame a is connected to a bracket. Above the bracket is a gas delivery component. The gas delivery component is connected to a heating box. The heating box is connected to an automatic temperature-controlled heating tube.

[0008] The gas delivery component is connected to the solidification bath via mounting frame b;

[0009] The connecting seat is connected to both ends of the solidification bath; the connecting seat is connected to the steering component.

[0010] Preferably, the filter screen divides the coagulation bath into a polyimide treatment chamber and a discharge chamber; the polyimide dry spray is connected to the discharge pipe, the discharge pipe is movably and sealingly connected to the cover, and the polyimide dry spray chamber is connected to the bundled guide rod.

[0011] Preferably, the gas delivery component includes a nozzle connected to the mounting frame b, a nozzle head connected below the nozzle and a delivery pipe connected above the nozzle, the delivery pipe connected to a delivery box, the delivery box connected to a connecting pipe, and the connecting pipe connected to a high-precision gas flow meter.

[0012] Preferably, a heating box is connected above the conveying box, and a connecting pipe connects to a gas regulating valve, a filter, a dryer, and a gas source.

[0013] Preferably, the mounting frame b has two parts, each connected to a spinneret. The spinneret is connected to the frame, and the spinneret's spinneret end faces into the coagulation bath.

[0014] Preferably, the steering component includes a limiting frame connected to the connecting seat. The limiting frame is provided with multiple mounting holes a and a limiting plate. The limiting plate is connected to bolt a and is provided with mounting holes b. One end of bolt a is threaded through the limiting plate and connected to the mounting seat. The mounting seat is connected to the bearing rod. The bearing rod is hollow inside and has an annular groove. The annular groove is connected to an annular block. The annular block is installed on the periphery of the steering rod.

[0015] Preferably, mounting holes a and b are connected by bolt b, which is used for detachable connection between the limiting plate and the limiting frame, and the limiting plate and the mounting base are detachable.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] This invention connects the two ends of the coagulation bath to the connecting seat, which in turn connects to a steering component. The steering component facilitates adjustment based on the tension of the polyimide precursor conveying, preventing unevenness during the conveying of the polyimide precursor and conveniently improving the quality of dry-jet wet spinning of polyimide precursor, thus enhancing the practicality of the spinning equipment. A filter screen is connected inside the coagulation bath. During the recycling operation, the filter screen is used to filter impurities in the coagulation bath, facilitating the secondary use of the coagulation bath. A heating box is connected to the conveyor box, and the heating box is connected to an automatic temperature-controlled heating tube. The use of the automatic temperature-controlled heating tube facilitates the setting and control of the gas temperature, conveniently improving the functionality of the polyimide dry-jet wet spinning equipment and further enhancing its practicality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2This is a schematic diagram of the internal structure of the coagulation bath in this utility model;

[0020] Figure 3 This is a schematic diagram of the steering component structure in this utility model.

[0021] Reference numerals: 1. Coagulation bath; 101. Filter screen; 102. Discharge pipe; 103. Bundling guide bar; 2. Mounting frame a; 3. Bracket; 4. Heating box; 5. Automatic temperature-controlled heating tube; 6. Nozzle; 601. Conveying pipe; 602. Conveying box; 603. Connecting pipe; 604. High-precision gas flow meter; 7. Mounting frame b; 701. Spinneret; 702. Frame; 8. Connecting seat; 801. Limiting frame; 802. Limiting plate; 803. Bolt a; 804. Mounting seat; 805. Bearing rod; 806. Annular groove; 807. Annular block; 808. Steering bar. Detailed Implementation

[0022] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0023] Example 1, as Figure 1 - Figure 3 As shown, the present invention proposes a polyimide dry-jet wet spinning equipment, comprising: a coagulation bath 1, a mounting frame a2, a support 3, a heating box 4, an automatic temperature-controlled heating tube 5, a gas conveying component, a mounting frame b7, and a connecting seat 8; the coagulation bath 1 is internally connected to a filter screen 101 and connected above the mounting frame a2, the mounting frame a2 is connected to the support 3, the support 3 is connected above the gas conveying component, the gas conveying component is connected to the heating box 4, and the heating box 4 is connected to the automatic temperature-controlled heating tube 5; the gas conveying component is connected to the coagulation bath 1 through the mounting frame b7; the connecting seat 8 is connected to both ends of the coagulation bath 1; the connecting seat 8 is connected to a steering component. By injecting water into the heating chamber 4, the automatic temperature-controlled heating tube 5 can monitor and control the temperature of the heated liquid. The high-precision temperature controller makes the heater simple and convenient to operate. At the same time, the temperature probe of the anti-dry-burning electric heating tube is close to the heating surface of the heating tube, which can effectively prevent the heater from running out of water or dry-burning through temperature monitoring, and play an over-temperature protection role. This can more effectively improve the service life and electrical characteristics. The automatic temperature-controlled heating tube 5 heats the water in the heating chamber 4, and the temperature of the heating chamber 4 changes, which in turn changes the temperature of the gas conveying parts, so as to avoid fuzzing and breakage caused by changes in the solidification effect. This facilitates the use of polyimide dry-jet wet spinning equipment.

[0024] To further explain, the filter 101 divides the coagulation bath 1 into a polyimide treatment chamber and a discharge chamber; the polyimide dry spraying connection discharge pipe 102 is movably and sealingly connected to the cover, and the polyimide dry spraying chamber is connected to the bundled guide rod 103. The coagulation bath in the coagulation bath 1 flows into the discharge chamber through the filter 101. The cover is movably opened to connect the discharge pipe 102 to the recovery equipment, so that the coagulation bath is discharged from the coagulation bath 1; the bundled guide rod 103 in the polyimide treatment chamber, in conjunction with the gas conveying component, the spinneret assembly, and the deflector, achieves the processing of polyimide filaments.

[0025] Further explanation: The steering component includes a limiting bracket 801 connected to the connecting seat 8. The limiting bracket 801 is provided with multiple mounting holes a and a limiting plate 802. The limiting plate 802 is connected to bolts a803 and is also provided with mounting holes b. One end of bolt a803 is threaded through the limiting plate 802 and the mounting seat 804. The mounting seat 804 is connected to the bearing rod 805. The bearing rod 805 has a hollow interior with an annular groove 806. The annular groove 806 is connected to an annular block 807, which is installed on the periphery of the steering rod 808. The limiting bracket 801 has an opening through which bolts a803 pass to connect the limiting plate 802 and the mounting seat 804, thereby connecting the bearing rods 805 and the steering rod 808 at both ends, facilitating the connection and use of the steering component parts.

[0026] To further explain, mounting holes a and b are connected by bolt b, which is used for the detachable connection between the limiting plate 802 and the limiting frame 801, and the limiting plate 802 and the mounting base 804 are also detachably connected. During the adjustment of the limiting plate 802, bolt b is loosened, passing through mounting hole b and connecting to the corresponding mounting hole a. Then, bolt b is tightened to connect the limiting plate 802 and the limiting frame 801, facilitating the adjustment of the steering rod 808 and conveniently adjusting the tension during the polyimide precursor yarn processing, thus improving the practicality of the polyimide dry-jet wet spinning equipment.

[0027] Example 2, as Figure 1 and Figure 2 As shown, the present invention proposes a polyimide dry-jet wet spinning equipment. Based on the above embodiments, this embodiment also details the specific components such as the gas conveying component and the mounting frame b7, as well as their assembly method.

[0028] To further explain, the gas delivery component includes a nozzle 6 connected to the mounting frame b7. A nozzle head is connected below the nozzle 6, and a delivery pipe 601 is connected above it. The delivery pipe 601 is connected to a delivery box 602, and the delivery box 602 is connected to a connecting pipe 603. The connecting pipe 603 is connected to a high-precision gas flow meter 604. Through automatic control by the high-precision gas flow meter 604 and the electrical interlock control device, precise automatic control of the gas flow rate can be achieved. This ensures that the gas can remove vapor from the air layer while preventing excessive airflow from causing the yarn to drift or the spinning solution surface to fluctuate, thereby increasing the CV value of the raw yarn linear density and reducing the risk of yarn breakage and bundling.

[0029] Further explanation: The heating box 4 is connected above the conveyor box 602, and the connecting pipe 603 connects to the gas regulating valve, filter, dryer, and gas source. The electrical interlocking automatic control device, CNC terminal, gas regulating valve, filter, dryer, and gas source are not shown in the diagram. The gas regulating valve and high-precision gas flow meter 604 are connected via the electrical interlocking automatic control device, which controls the flow rate of the gas ejected from the nozzle by controlling the gas regulating valve. A CNC terminal is installed on the frame 702, featuring a control interface for easy operation and setting of commands. The data terminal is connected to the electrical interlocking automatic control device, allowing operators to adjust the entire equipment via the CNC terminal. Operation is simple and convenient.

[0030] To further explain, there are two mounting frames b7, each connected to a spinneret 701. The spinneret 701 is connected to the frame 702, and the spinneret end of the spinneret 701 faces into the coagulation bath 1. An air layer is provided in the polyimide treatment chamber of the coagulation bath 1. The nozzle is located on one side of the spinneret 701 and the air layer, so that the components of the polyimide dry-jet wet spinning equipment can be connected and used together.

[0031] The working principle of this utility model is as follows: When the spinning equipment is in use, bolt a803 is tightened according to the dry-jet wet spinning treatment of polyimide precursor fibers, separating the limiting plate 802 and the limiting frame 801. The limiting plate 802 adapts to the requirements of the steering rod 808, allowing the limiting plate 802 to move around the limiting frame 801. After the movement determines the working position, bolt b is used to connect the limiting frame 801 and the limiting plate 802, and bolt a803 is used to connect the limiting plate 802 and the mounting base 804. The mounting base 804 drives the bearing rod 805, and the bearing rod 805 drives the rotation... The guide bar 808 allows for adjustment of the distance between the guide bar 808 and the bundled guide bar 103, facilitating the adjustment of the tension of the polyimide filament feed, improving the uniformity of the dry-jet wet spinning process of the polyimide filament, and enhancing the processing quality. Gas enters the air layer between the spinneret 701 and the liquid surface of the coagulation bath 1 through the gas conveying component, driving the solution vapor flow, and finally being recovered into the recovery device through the discharge pipe 102. This allows the polyimide filament to pass through the guide bar 808 and the bundled guide bar 103 in the coagulation bath 1, achieving the dry-jet wet spinning processing of the polyimide filament.

[0032] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A polyimide dry-jet wet spinning spinning device, characterized in that, include: The solidification bath (1) is connected to a filter screen (101) inside and to a mounting frame a (2) above. The mounting frame a (2) is connected to a bracket (3). A gas conveying component is connected above the bracket (3). The gas conveying component is connected to a heating box (4). The heating box (4) is connected to an automatic temperature-controlled heating tube (5). The gas delivery component is connected to the coagulation bath (1) via the mounting frame b (7); And connecting seat (8), which is connected to both ends of the coagulation bath (1); connecting seat (8) connects to the steering component.

2. The polyimide dry-jet wet spinning equipment according to claim 1, characterized in that, The filter screen (101) divides the coagulation bath (1) into a polyimide treatment chamber and a discharge chamber; the polyimide dry spray connection discharge pipe (102) is connected to the cover body in a movable seal, and the polyimide dry spray chamber is connected to the bundled guide rod (103).

3. The polyimide dry-jet wet spinning equipment according to claim 1, characterized in that, The gas delivery component includes a nozzle (6) connected to the mounting frame b (7), a nozzle (6) connected to the nozzle (6) below and a delivery pipe (601) connected to the nozzle (601) above, a delivery box (602) connected to the delivery box (602), a connecting pipe (603) connected to the delivery box (602), and a high-precision gas flow meter (604) connected to the connecting pipe (603).

4. The polyimide dry-jet wet spinning equipment according to claim 3, characterized in that, The heating box (4) is connected above the conveying box (602), and the connecting pipe (603) is connected to the gas regulating valve, filter, dryer and gas source.

5. The polyimide dry-jet wet spinning equipment according to claim 2, characterized in that, The mounting frame b (7) has two parts and is connected to the spinneret (701) respectively. The spinneret (701) is connected to the frame (702), and the spinneret (701) has its spinneret end facing into the coagulation bath (1).

6. The polyimide dry-jet wet spinning equipment according to claim 1, characterized in that, The steering component includes a limit frame (801) connected to the connecting seat (8). The limit frame (801) is provided with multiple mounting holes a and a limit plate (802). The limit plate (802) is connected to bolt a (803) and is provided with mounting holes b. One end of bolt a (803) is threaded through the limit plate (802) and the mounting seat (804). The mounting seat (804) is connected to the bearing rod (805). The bearing rod (805) is hollow inside and provided with an annular groove (806). The annular groove (806) is connected to an annular block (807). The annular block (807) is installed on the periphery of the steering rod (808).

7. The polyimide dry-jet wet spinning equipment according to claim 6, characterized in that, Mounting holes a and b are connected by bolt b, which is used for the detachable connection of the limiting plate (802) and the limiting bracket (801), and the detachable connection of the limiting plate (802) and the mounting base (804).

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