Heat setting device for carbon fiber production

Abstract

The utility model provides a heat setting device for carbon fiber production, which comprises a setting box, two opposite side walls of the setting box are respectively provided with an opening for carbon fiber yarns to pass through, the bottom of the setting box is paved with an air distribution pipe for upwards discharging air, and the air distribution pipe is communicated with an external air heater through a hot air pipe. An exhaust hole is formed in the top of the shaping box, and a filter layer covers the exhaust hole. According to the heat setting device for carbon fiber production, through the upward air outlet air distribution pipes laid at the bottom of the setting box, hot air evenly penetrates through carbon fiber tows from bottom to top, the heating uniformity of fibers is ensured, the directional arrangement effect of molecular chains in the carbonization process is improved, and therefore the consistency of the mechanical property of a final product is improved. The top exhaust holes are combined with the design of the filter layer, so that directional collection and particulate matter interception of waste gas after heat setting are realized, heat energy loss caused by disordered diffusion of the high-temperature waste gas is avoided, and dust pollution of a production workshop is reduced.

Description

Technical Field

[0001] This application relates to heat setting technology in the production process of carbon fiber filaments, and more particularly to a heat setting device for carbon fiber production. Background Technology

[0002] After the drawing process, carbon fiber filaments need to undergo heat treatment to achieve a certain stability and fix them in a new shape through heat setting.

[0003] Existing heat-setting equipment for carbon fibers typically uses dry heat setting, which involves statically heating the carbon fiber filaments. However, existing heat-setting equipment suffers from uneven heating of the fibers, with localized overheating easily leading to surface oxidation defects and reduced product yield. Furthermore, the direct, unorganized diffusion of high-temperature gas generated during static heating results in wasted heat energy, and the micro-dust detached from the carbon fiber surface further exacerbates the problem of excessive dust concentration in the workshop. Utility Model Content

[0004] This application provides a heat setting device for carbon fiber production, which solves the problems of uneven heating and dust pollution in the workshop caused by the shedding of micro-dust from the surface of carbon fiber during the existing static heating process of carbon fiber filaments.

[0005] This application provides a heat setting device for carbon fiber production, including a setting box. The two opposite side walls of the setting box are respectively provided with openings for carbon fiber filaments to pass through. The bottom of the setting box is covered with an upward air distribution pipe, which is connected to an external hot air blower through a hot air pipe. The top of the setting box is provided with an exhaust hole, which is covered with a filter layer.

[0006] Optionally, a sound wave emitter is installed on one side of the shaping box, facing the carbon fiber filaments.

[0007] Optionally, a sound-absorbing plate is fixed on the other side wall of the shaping box, opposite to the position of the sound wave emitter. The sound-absorbing plate is a raised structure made of sound-absorbing material.

[0008] Optionally, the acoustic transmitter is installed at the bottom of the shaping box, and the acoustic transmitter is oriented in the same direction as the air distribution duct.

[0009] The heat setting device for carbon fiber production provided in this application ensures uniform heating of the fibers by using an upward-exiting air duct laid at the bottom of the setting box, which allows hot air to penetrate the carbon fiber bundles evenly from bottom to top. This enhances the directional alignment of molecular chains during carbonization and improves the consistency of the mechanical properties of the final product.

[0010] The top exhaust vents, combined with the filter layer design, enable the directional collection of exhaust gas and the interception of particulate matter (such as micro-dust falling off the carbon fiber surface) after heat setting. This avoids heat loss caused by the disorderly diffusion of high-temperature exhaust gas and reduces dust pollution in the production workshop. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 A top view of a heat-setting apparatus for carbon fiber production provided in an embodiment of this application;

[0013] Figure 2 A top cross-sectional view of a heat-setting apparatus for carbon fiber production provided in an embodiment of this application;

[0014] Figure 3 A cross-sectional view of the EE section of a heat-setting apparatus for carbon fiber production provided in an embodiment of this application.

[0015] Explanation of reference numerals in the attached figures:

[0016] 1. Shaping box; 2. Opening; 3. Air duct; 4. Hot air duct; 5. Exhaust vent; 6. Filter layer; 7. Sound wave emitter; 8. Sound absorption panel; 9. Carbon fiber filament. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0018] like Figures 1-3 As shown, one embodiment of this application provides a heat setting device for carbon fiber production, including a setting box 1. The setting box 1 has openings 2 on its opposite side walls for carbon fiber filaments 9 to pass through. The bottom of the setting box 1 is covered with an upward-exiting air distribution pipe 3. The air distribution pipe 3 is connected to an external hot air blower through a hot air pipe 4. The top of the setting box 1 is provided with an exhaust hole 5, and the exhaust hole 5 is covered with a filter layer 6.

[0019] In use, carbon fiber filaments 9 enter through opening 2 on one side of the shaping chamber 1, pass through the chamber 1, and exit through opening 2 on the other side. Hot air is blown from the air distribution pipe 3 into the shaping chamber 1 via a hot air blower 4 to heat-set the carbon fiber filaments 9. The carbon fiber filaments 9 pass through the shaping chamber 1 sequentially, undergoing heat setting via the hot air blown through the air distribution pipe 3. After heat setting, the hot air is filtered through the filter layer 6 and discharged through the exhaust port 5, allowing the carbon fiber filaments 9 to proceed to the next process.

[0020] In this embodiment, by laying an upward-exiting air duct 3 at the bottom of the shaping box 1, hot air penetrates the carbon fiber bundle evenly from bottom to top, ensuring the uniformity of fiber heating, improving the directional arrangement of molecular chains during carbonization, and thus improving the consistency of the mechanical properties of the final product.

[0021] The top exhaust vent 5, combined with the filter layer 6, enables the directional collection of exhaust gas and the interception of particulate matter (such as micro-dust falling off the carbon fiber surface) after heat setting. This avoids heat loss caused by the disorderly diffusion of high-temperature exhaust gas and reduces dust pollution in the production workshop.

[0022] In one possible implementation, a sound wave emitter 7 is installed on one side of the shaping box 1, facing the carbon fiber filament 9.

[0023] The sound wave emitter 7 emits sound waves toward the carbon fiber filament 9. The frequency of the sound waves emitted by the sound wave emitter 7 is consistent with the natural frequency of the carbon fiber filament 9. The emitted sound wave energy is absorbed by the carbon fiber filament 9, causing the carbon fiber filament 9 to resonate, thereby causing the carbon fiber filament 9 to relax to a certain extent, eliminating the internal stress of the fiber, and maintaining its state during the shaping process.

[0024] In one possible implementation, a sound-absorbing plate 8 is fixed on the side wall of the other side inside the shaping box 1, opposite to the position of the sound wave emitter 7. The sound-absorbing plate 8 is a raised structure made of sound-absorbing material.

[0025] The sound waves emitted by the sound wave transmitter 7 are absorbed by the sound-absorbing plate 8 when they reach the other end, reducing reflection and minimizing the impact of reflected sound waves on the frequency reduction of the emitted sound waves.

[0026] In one possible implementation, the acoustic transmitter 7 is mounted at the bottom of the shaping box 1, and the acoustic transmitter 7 is oriented in the same direction as the air distribution duct 3.

[0027] The sound wave propagation direction of the sound wave transmitter 7 is consistent with the airflow direction of the air distribution duct 3, which can reduce the sound intensity attenuation caused by airflow and maintain the frequency of the sound wave.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A heat-setting device for carbon fiber production, comprising a setting box (1), characterized in that: The shaping box (1) has openings (2) on its opposite side walls for carbon fiber filaments (9) to pass through. The bottom of the shaping box (1) is covered with an upward air distribution pipe (3). The air distribution pipe (3) is connected to an external hot air blower through a hot air pipe (4). The top of the shaping box (1) is provided with an exhaust hole (5). The exhaust hole (5) is covered with a filter layer (6).

2. The heat setting device for carbon fiber production according to claim 1, characterized in that: A sound wave transmitter (7) is installed on one side of the shaping box (1) and is arranged toward the carbon fiber filament (9).

3. The heat setting device for carbon fiber production according to claim 2, characterized in that: A sound-absorbing plate (8) is fixed on the side wall of the other side of the shaping box (1), which is opposite to the position of the sound wave transmitter (7). The sound-absorbing plate (8) is a raised structure made of sound-absorbing material.

4. The heat setting device for carbon fiber production according to claim 2, characterized in that: The acoustic transmitter (7) is installed at the bottom of the shaping box (1), and the acoustic transmitter (7) is oriented in the same direction as the air distribution pipe (3).

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