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A pressurized melting high-speed centrifugal spinning device and method for pitch carbon fiber

A technology of pitch carbon fiber and high-speed centrifugation, which is applied in fiber processing, textile and papermaking, filament/thread forming, etc. It can solve the problems of fiber diameter reduction and poor centrifugal spinning effect, and achieve the effect of poor solution effect

Active Publication Date: 2022-06-17
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a pressurized melting high-speed centrifugal spinning device for pitch carbon fiber. Centrifugal traction reduces the fiber diameter, thus effectively solving the problem of poor centrifugal spinning effect

Method used

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  • A pressurized melting high-speed centrifugal spinning device and method for pitch carbon fiber

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Effect test

example 1

[0025] like figure 1 As shown, the pressurized melting high-speed centrifugal spinning device for pitch carbon fiber of the present invention includes a high-speed motor 1, a storage tank 2, a shaft 3, a spinning barrel 4, a heating device 5, an incubator 6, a constant pressure device 7, and a high-temperature screw. Feeding device 8, high temperature bearing 9.

[0026] The high-speed motor 1 is connected to one end of the shaft 3 through a coupling, and the other end of the shaft 3 is connected to the spinning barrel 4. The side wall of the spinning barrel 4 is provided with a plurality of spinning holes for When the spinning barrel 4 rotates, the molten asphalt in its inner cavity is thrown out from the spinneret hole; the storage tank 2 is used to store the molten asphalt material, and the upper end and the lower end of the storage tank 2 are respectively installed on the shaft through the high temperature bearing 9. 3, the center of the shaft 3 located inside the storage...

Embodiment 2

[0034] According to the method of Example 1, the difference is that the temperature of the heating device is set to 280 ° C, the temperature of the incubator is 210 ° C, and the pressure of the constant pressure device 7 is 0.5 MPa. After the temperature is stabilized, nitrogen is introduced, and the motor speed is adjusted to 1500 rev / min, the general-grade spinnable pitch with a softening point of 220° C. was added to the high-temperature screw feeding device 8, the diameter of the spinneret hole was 0.5 mm, and the fiber strands of 16 μm were obtained after centrifugal spinning.

Embodiment 3

[0036] According to the method of Example 1, the difference is that the temperature of the heating device is set to 340 ° C, the temperature of the incubator is 260 ° C, and the pressure of the constant pressure device 7 is 0.8 MPa. After the temperature is stable, nitrogen is introduced, and the motor speed is adjusted to 1800 rev / min, add the mesophase spinnable pitch with a softening point of 270°C into the high-temperature screw feeding device 8, the diameter of the spinneret hole is 0.4mm, and after centrifugal spinning, 11 μm fiber strands are obtained.

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Abstract

The invention discloses a pressurized melting high-speed centrifugal spinning device and method for pitch carbon fiber, belonging to the technical field of fiber material spinning. The high-speed motor of the device is connected to one end of the shaft, and the other end of the shaft is connected to the spinning barrel. The storage tank is installed in the middle of the shaft, and the center of the shaft located inside the storage tank is provided with a material flow hole communicating with the storage tank. And the material circulation hole extends downwards to communicate with the spinning barrel; the storage tank is respectively connected with the high-temperature screw feeding device and the constant pressure device, the heating device is arranged outside the storage tank, and the incubator is arranged outside the spinning barrel. The spinning method is to input the asphalt material into the storage tank through the high-temperature screw feeding device, and enter the spinning barrel through the material flow hole. When the high-speed motor rotates, the N 2 Under the action of pressure and centrifugal force, the molten asphalt in the spinning barrel is thrown out from the spinneret hole in the form of fibers. The invention promotes uniform extrusion of asphalt from spinneret holes through stable pressure, and reduces the diameter of asphalt fibers through high-speed centrifugal traction.

Description

technical field [0001] The invention relates to the technical field of fiber material spinning, in particular to a pressurized melting high-speed centrifugal spinning device and method for pitch carbon fibers. Background technique [0002] Pitch carbon fiber is a high-tech product, an indispensable material for cutting-edge technologies such as aerospace, aviation and military industries, and a basic raw material for the replacement of some products in the civilian industry. At present, the production technology of pitch carbon fiber is only mastered in developed countries such as Japan, the United States and Germany. Even the export of general-purpose carbon fiber complete sets of technology still needs special approval from the government of the exporting country. [0003] An important step in the production of pitch carbon fibers is to melt-spin the high softening point spinnable pitch to below 20 μm. If the traditional melt spinning wants to spin smoothly, it needs to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/18D01D13/02
CPCD01D5/18D01D13/02
Inventor 曲世杰申文忠
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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