Carbon fiber production process

Abstract

The invention discloses a carbon fiber production process and relates to the technical field of carbon fiber production. The drying unit is used for leading the carbon fiber filaments drawn out from the coiled carbon fiber filaments to a dryer; the cutting unit is used for cutting the carbon fiber yarns conveyed from the drying unit; the first negative pressure unit is used for carrying out negative pressure treatment on the cut long carbon fiber yarns conveyed from the cutting unit to obtain a fluffy carbon fiber layer; the second negative pressure unit is used for carrying out secondary negative pressure treatment on the fluffy carbon fiber layer conveyed from the first negative pressure unit to obtain a carbon fiber web; the extrusion unit is used for carrying out extrusion treatment on the carbon fiber web tire conveyed from the second negative pressure unit; and the needling unit is used for carrying out pre-needling and re-needling treatment on the extruded carbon fiber net tire. The production line has the advantages that automatic production from the carbon fiber filaments to the carbon fiber soft felt is achieved, all the units are continuously arranged and located on the same production line, transportation of finished products machined by all the units is avoided, and manual labor is greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of carbon fiber production, in particular to a carbon fiber production process. Background Art

[0002] Carbon fiber soft felt is a kind of felt made of carbon fiber. It has a broad spectrum of adsorption, large capacity, and good adsorption of inorganic gases. Carbon felt also has the characteristics of permanent flame retardancy, which is that it will not melt or drip when it encounters fire, will not spread, will not emit black smoke, is non-toxic, will curl up and carbonize, and will maintain flame retardant properties after multiple washings.

[0003] At present, there are three main types of carbon felt in the world: polyacrylonitrile (PAN)-based carbon felt, viscose-based carbon felt, and asphalt-based carbon felt. The largest domestic production and consumption is polyacrylonitrile (PAN)-based carbon felt. Specifically, it is divided into PAN-based acrylic carbon felt, PAN-based raw fiber carbon felt, PAN-based pre-oxidized fiber carbon felt, and PAN-based carbon fiber carbon felt. The corresponding raw materials are PAN-based acrylic short fiber, PAN-based carbon fiber raw fiber short fiber, PAN-based carbon fiber pre-oxidized short fiber, and PAN-based carbon fiber chopped filament.

[0004] At present, the cutting, drying and soft felt needle weaving of carbon fiber filaments are divided into three processes. The cutting machines, drying ovens and weaving machines used in the three processes are not on the same production line and are far away from each other. The transportation of the finished products processed in each process is rather cumbersome. Summary of the invention

[0005] The invention provides a carbon fiber production process, aiming to solve the problem of cumbersome transportation between cutting, drying and needle weaving of carbon fiber precursor.

[0006] To achieve the above object, the present invention adopts the following technical solution:

[0007] The present invention provides a carbon fiber production process, comprising:

[0008] A drying unit is used to connect the carbon fiber filaments drawn from the rolled carbon fiber filaments to the dryer, and the carbon fiber filaments after drying are transported to the next process;

[0009] A cutting unit, used for cutting the carbon fiber filaments conveyed from the drying unit;

[0010] The first negative pressure unit is used to perform negative pressure treatment on the cut long carbon fiber filaments transported from the cutting unit to obtain a fluffy carbon fiber layer;

[0011] The second negative pressure unit is used to perform a secondary negative pressure treatment on the fluffy carbon fiber layer delivered from the first negative pressure unit to obtain a carbon fiber web;

[0012] An extrusion unit is used to extrude the carbon fiber web delivered from the second negative pressure unit;

[0013] The needling unit is used for pre-needling and re-needling the extruded carbon fiber web delivered from the extrusion unit;

[0014] The drying unit comprises a fiber roller, a rolled carbon fiber filament, a carbon fiber filament, a drying machine, a roller shaft, and a diversion mechanism. The rolled carbon fiber filament is placed on the fiber roller. The carbon fiber filament is extracted from the rolled carbon fiber filament. The carbon fiber filament is led to the drying machine through the diversion mechanism. After passing through the drying machine, the carbon fiber filament is led to the roller shaft. The carbon fiber filament is transported to the cutting unit through the roller shaft.

[0015] The cutting unit includes an adjustable column, a cutter, a first conveyor belt, a support, a control cabinet, a limit block, and a limit hole. The support is provided with a first conveyor belt, a limit hole is provided at the upper end of the support, the adjustable column and the limit block pass through the limit hole, the cutter is provided at the lower side of the adjustable column, and a control cabinet is provided at the outer side of the support;

[0016] The first negative pressure unit includes a second conveyor belt, an air inlet box, a first air inlet fan, a negative pressure pipe, a first exhaust fan, a discharge cylinder, a third conveyor belt, and a first fan. The end of the second conveyor belt is provided with an air inlet box, the upper end of the air inlet box is provided with a negative pressure pipe, the end of the negative pressure pipe is connected to the discharge cylinder, the lower end of the discharge cylinder is provided with a third conveyor belt, the air inlet end of the negative pressure pipe is provided with a first air inlet fan, the upper end of the discharge cylinder is provided with a first exhaust fan, and the rear side of the air inlet box is provided with a first fan;

[0017] The second negative pressure unit includes a negative pressure box, a second fan, a fourth conveyor belt, a second exhaust fan, and a feed port. The front end of the negative pressure box is provided with a feed port, the upper end of the negative pressure box is provided with a second fan, the left end of the negative pressure box is provided with a second exhaust fan, and the negative pressure box is provided with a fourth conveyor belt extending to the outside.

[0018] Furthermore, the carbon fiber filaments are closely distributed on the outer wall of the dryer.

[0019] Furthermore, the cutter winds the carbon fiber filaments by rotating, and the adjustable column cuts the wound carbon fiber filaments by extrusion.

[0020] Furthermore, the carbon fiber production process comprises the following steps:

[0021] Step 1: Preparation

[0022] First, the rolled carbon fiber filaments are fixedly placed on the fiber roller, and the carbon fiber filaments are extracted from the rolled carbon fiber filaments. The extracted carbon fiber filaments pass through the diversion mechanism, the dryer, and the roller in sequence. The carbon fiber filaments are close to the dryer, and then the carbon fiber filaments after bypassing the roller are connected to the cutter of the cutting unit and wound along the surface of the cutter to complete the preparation work;

[0023] Step 2: Drying in a dryer

[0024] Preheat the dryer to 180°C. After preheating, the dryer starts to rotate, drying the carbon fiber filaments evenly while driving the carbon fiber filaments to move;

[0025] Step 3: Cutting with cutting machine

[0026] The cutter of the cutting unit continuously winds the dried carbon fiber filaments by rotating. After winding to a certain thickness, the wound carbon fiber filaments are squeezed by the adjustable column located above the cutter side, and the wound carbon fiber filaments are cut. The cut long carbon fiber filaments fall onto the first conveyor belt and are transported to the first negative pressure unit through the first conveyor belt.

[0027] Step 4: Textile pretreatment

[0028] The first conveyor belt of the cutting unit delivers the chopped carbon fiber filaments to the second conveyor belt of the first negative pressure unit. The first fan blows air to loosen the chopped carbon fiber filaments on the second conveyor belt. The first air intake fan intakes air into the negative pressure pipe. The first exhaust fan exhausts air from the negative pressure pipe to form a negative pressure in the negative pressure pipe. The loosened chopped carbon fiber filaments enter the negative pressure pipe and reach the third conveyor belt through the discharge cylinder to form a 20-30mm fluffy carbon fiber layer.

[0029] The fluffy carbon fiber layer on the third conveyor belt passes through the third conveyor belt and enters the negative pressure box from the feeding port of the second negative pressure unit. The second fan at the upper end of the negative pressure box performs secondary fluffing on the fluffy carbon fiber layer to form a fiber ball. The second exhaust fan exhausts air to form a negative pressure in the negative pressure box. The fiber ball that falls onto the fourth conveyor belt is subjected to the negative pressure in the negative pressure box to form a 200-250mm carbon fiber mesh tire. The carbon fiber mesh tire reaches the extrusion unit via the fourth conveyor belt.

[0030] Step 5: Weaving into felt

[0031] The carbon fiber mesh arrives at the extrusion unit, and after being extruded by the extrusion unit, it arrives at the needle punching unit, and after pre-punching and re-punching by the needle punching unit, it is finally made into a carbon fiber soft felt.

[0032] The advantages of the present invention are as follows: the production line of the present invention can realize the automatic production of carbon fiber filaments to carbon fiber soft felt through the mutual cooperation between the drying unit, the cutting unit, the first negative pressure unit, the second negative pressure unit, the extrusion unit, and the needling unit. The units are arranged continuously and located on the same production line, which avoids the transportation of finished products processed by each unit and greatly reduces manual labor.

[0033] The drying unit is designed with a guide mechanism to effectively control the direction of the carbon fiber filaments and ensure that the carbon fiber filaments reaching the drying cylinder are evenly arranged. The carbon fiber filaments are closely distributed on the outer wall of the dryer, and the carbon fiber filaments are evenly heated during drying, thereby improving the drying efficiency.

[0034] The cutting unit is designed with a tool, a limit block and an adjustable column. When in use, the dried carbon fiber filaments are rotated by the tool and then wound. When a certain thickness is reached, they are squeezed by the adjustable column to complete the cutting. The interval between the adjustable column and the tool is adjustable, and the interval adjustment is completed by limit blocks of different sizes to achieve the thickness of the carbon fiber winding. The cutting unit has a simple structure and the length of the cut carbon fiber filaments is uniform.

[0035] The first negative pressure unit exhausts air from the negative pressure pipe through the first exhaust fan, and the first intake fan intakes air into the negative pressure pipe, thereby forming a negative pressure in the negative pressure pipe to improve the transmission efficiency. The first fan loosens the carbon fiber to form a fluffy carbon fiber layer. The negative pressure formed by the second negative pressure unit processes the fluffy carbon fiber layer into a carbon fiber mesh tire. The structure is simple and easy to use, and it is applicable to a wider range of scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic diagram of a carbon fiber production line of the present invention;

[0037] Figure 2 It is a structural schematic diagram of a drying unit of the present invention;

[0038] Figure 3 is a schematic structural diagram of a cutting unit of the present invention;

[0039] Figure 4 It is a schematic diagram of the installation of the limiting block of the cutting unit of the present invention;

[0040] Figure 5 It is a schematic diagram of the planar structure of the cutting tool and the adjustable column of the cutting unit of the present invention;

[0041] Figure 6 is a structural schematic diagram of the first negative pressure unit of the present invention;

[0042] Figure 7 It is a schematic structural diagram of the second negative pressure unit of the present invention.

[0043] Legend:

[0044] 1-drying unit, 101-fiber roller, 102-rolled carbon fiber filaments, 103-carbon fiber filaments, 104-drying machine, 105-roller, 106-diverter mechanism, 2-cutting unit, 201-adjustable column, 202-knife, 203-first conveyor belt, 204-support, 205-control cabinet, 206-limiting block, 207-limiting hole, 3-first negative pressure unit, 301-second conveyor belt, 302-air inlet box, 303-first air inlet fan, 304-negative pressure pipe, 305-first exhaust fan, 306-discharging barrel, 307-third conveyor belt, 308-first fan, 4-second negative pressure unit, 401-negative pressure box, 402-second fan, 403-fourth conveyor belt, 404-second exhaust fan, 405-feeding port. DETAILED DESCRIPTION

[0045] The content of the present invention is further described below in conjunction with the examples. The examples are not intended to limit the scope of protection of the present invention. Without departing from the essence of the technical solution of the present invention, modifications or substitutions made to the method, steps or conditions of the present invention all belong to the scope of the present invention.

[0046] Unless otherwise specified, the equipment, devices and process methods used in the examples are conventional equipment, devices and process methods well known to those of ordinary skill in the art.

[0047] like Figure 1-Figure 7 A carbon fiber production line shown includes:

[0048] The drying unit 1 is used to connect the carbon fiber filaments 103 drawn from the rolled carbon fiber filaments 102 to the dryer 104, and the carbon fiber filaments 103 after drying are transported to the next process.

[0049] like Figure 2 As shown in the schematic diagram, the drying unit 1 includes a fiber roller 101, a rolled carbon fiber filament 102, a carbon fiber filament 103, a dryer 104, a roller 105, and a diversion mechanism 106. The rolled carbon fiber filament 102 is placed on the fiber roller 101. The rotation of the fiber roller 101 drives the rolled carbon fiber filament 102 to rotate, so that the carbon fiber filament 103 is drawn out from the rolled carbon fiber filament 102.

[0050] The drawn carbon fiber filaments 103 are connected to the diversion mechanism 106, which effectively controls the direction of the carbon fiber filaments to avoid knotting of the drawn carbon fiber filaments 103, and also makes the carbon fiber filaments 103 connected to the dryer 104 closely distributed, so that the carbon fiber filaments 103 are heated evenly during drying. The carbon fiber filaments 103 are connected to the dryer 104 through the diversion mechanism 106, and the carbon fiber filaments 103 that have been dried in the dryer 104 are connected to the roller 105, and then connected to the cutting unit 2 after passing through the roller 105.

[0051] The cutting unit 2 is used to cut the carbon fiber filaments 103 delivered from the drying unit 1.

[0052] like Figure 3-Figure 5 As can be seen from the schematic diagram shown, the cutting unit 2 includes an adjustable column 201, a tool 202, a first conveyor belt 203, a support 204, a control cabinet 205, a limit block 206, and a limit hole 207. A control cabinet 205 is arranged on the outside of the support 204 for controlling the start and stop of the cutting unit 2. A first conveyor belt 203 is arranged on the support 204. The first conveyor belt 203 is located below the tool 202 and is conveyed in a horizontal direction. A limit hole 207 is arranged on the upper end of the support 204. The adjustable column 201 and the limit block 206 pass through the limit hole 207. The limit block 206 is used to adjust the spacing distance between the adjustable column 201 and the tool 202. Limit blocks 206 of different sizes are used to adjust the position of the adjustable column 201 along the limit hole 207.

[0053] The cutter 202 is arranged at the lower side of the adjustable column 201. The dried carbon fiber filaments 103 are rotated and wound by the cutter 202. After reaching a certain thickness, they are squeezed by the adjustable column 201 to complete the cutting. The cut carbon fiber filaments 103 fall onto the first conveyor belt 203 and are transported to the first negative pressure unit 3 along the first conveyor belt 203.

[0054] The first negative pressure unit 3 is used for performing negative pressure treatment on the cut carbon fiber filaments 103 transported from the cutting unit 2 to obtain a fluffy carbon fiber layer.

[0055] like Figure 6 As can be seen from the schematic diagram shown, the first negative pressure unit 3 includes a second conveyor belt 301, an air intake box 302, a first air intake fan 303, a negative pressure pipe 304, a first exhaust fan 305, a discharge cylinder 306, a third conveyor belt 307, and a first fan 308. The second conveyor belt 301 is inclined between the first conveyor belt 203 and the air intake box 302. The second conveyor belt 301 is inclined at a high point below the first conveyor belt 203 and can be connected to the first conveyor belt 203 to convey the carbon fiber filaments 103 that have fallen and been cut. The second conveyor belt 301 is inclined at a low point inside the air intake box 302.

[0056] A first fan 308 is disposed at the rear side of the air inlet box 302 , and the first fan 308 continuously blows air to the cut carbon fiber filaments 103 on the second conveyor belt 301 to form a fluffy carbon fiber layer.

[0057] A negative pressure pipe 304 is provided at the upper end of the air inlet box 302, and the end of the negative pressure pipe 304 is connected to the discharge barrel 306. A third conveyor belt 307 is provided at the lower end of the discharge barrel 306. The third conveyor belt 307 is used to receive the fluffy carbon fiber layer dropped from the discharge barrel 306. A first air intake fan 303 is provided at the air inlet end of the negative pressure pipe 304, and a first exhaust fan 305 is provided at the upper end of the discharge barrel 305. The negative pressure pipe 304 is evacuated by the first exhaust fan 305, and the first air intake fan 303 intakes air into the negative pressure pipe, and negative pressure is formed in the negative pressure pipe 304. The fluffy carbon fiber layer reaches the discharge barrel 306 along the negative pressure pipe 304, and then falls to the third conveyor belt 307, and is conveyed to the second negative pressure unit 4 along the third conveyor belt 307.

[0058] The second negative pressure unit 4 is used for performing secondary negative pressure treatment on the fluffy carbon fiber layer delivered from the first negative pressure unit 3 to obtain a carbon fiber web.

[0059] like Figure 7 As can be seen from the schematic diagram shown, the second negative pressure unit 4 includes a negative pressure box 401, a second fan 402, a fourth conveyor belt 403, a second exhaust fan 404, and a feed port 405. A feed port 405 is provided at the front end of the negative pressure box 401, and the feed port 405 is used to connect to the third conveyor belt 307.

[0060] A second fan 402 is provided at the upper end of the negative pressure box 401. The second fan 402 continuously takes in air, which can secondary loosen the fluffy carbon fiber layer on the third conveyor belt 307 and then drop it to the fourth conveyor belt 403. A second exhaust fan 404 is provided at the left end of the negative pressure box 401. The second exhaust fan 404 forms negative pressure in the negative pressure box 401.

[0061] A fourth conveyor belt 403 extending outside is arranged in the negative pressure box 401, and the fourth conveyor belt 403 is inclined between the third conveyor belt 307 and the extrusion unit 5. The fourth conveyor belt 403 is inclined at a lower part below the third conveyor belt 307, and can be connected to the third conveyor belt 307 to convey the dropped fluffy carbon fiber layer. The second conveyor belt 301 is inclined at a higher part on the side of the extrusion unit 5. The fourth conveyor belt 403 is a grid-shaped conveyor belt, and the secondary opened fluffy carbon fiber layer that falls onto the fourth conveyor belt 403 forms a carbon fiber mesh tire under the action of negative pressure.

[0062] The extrusion unit 5 is used to extrude the carbon fiber web delivered from the second negative pressure unit 4 .

[0063] The needling unit 6 is used for pre-needling and re-needling the extruded carbon fiber web delivered from the extrusion unit 5 .

[0064] Based on the above-mentioned carbon fiber production line, the production process of carbon fiber of the present invention comprises the following steps:

[0065] Step 1: Preparation

[0066] First, the rolled carbon fiber filaments 102 are fixedly placed on the fiber roller 101, and the carbon fiber filaments 103 are extracted from the rolled carbon fiber filaments 102. The extracted carbon fiber filaments 103 pass through the diversion mechanism 106, the dryer 104, and the roller 105 in sequence. The carbon fiber filaments 103 are close to the dryer 104, and then the carbon fiber filaments 103 after passing the roller 105 are connected to the cutter 202 of the cutting unit 2, and are wound along the surface of the cutter 202, completing the preparation work;

[0067] Step 2: Drying in a dryer

[0068] The dryer is preheated to 180° C. After the preheating is completed, the dryer starts to rotate, and the carbon fiber filaments 103 are evenly dried while driving the carbon fiber filaments 103 to move;

[0069] Step 3: Cutting with cutting machine

[0070] The cutter 202 of the cutting unit 2 continuously winds the dried carbon fiber filaments 103 by rotating. After winding to a certain thickness, the wound carbon fiber filaments 103 are squeezed by the adjustable column 201 located above the side of the cutter 202, and the wound carbon fiber filaments 103 are cut. The cut long carbon fiber filaments fall onto the first conveyor belt 203 and are transported to the first negative pressure unit 3 through the first conveyor belt 203.

[0071] Step 4: Textile pretreatment

[0072] The first conveyor belt 203 of the cutting unit 2 delivers the chopped carbon fiber filaments to the second conveyor belt 301 of the first negative pressure unit 3, the first fan 308 blows air to loosen the chopped carbon fiber filaments on the second conveyor belt 301, the first air intake fan 303 intakes air into the negative pressure pipe 304, the first exhaust fan 305 exhausts air from the negative pressure pipe 304, a negative pressure is formed in the negative pressure pipe 304, the loosened chopped carbon fiber filaments enter the negative pressure pipe 304 and then reach the third conveyor belt 307 through the discharge cylinder 306, forming a 20 mm fluffy carbon fiber layer;

[0073] The fluffy carbon fiber layer on the third conveyor belt 307 passes through the third conveyor belt 307 and enters the negative pressure box 401 from the feed port 405 of the second negative pressure unit 4. The second fan 402 at the upper end of the negative pressure box 401 performs secondary loosening and fluffing on the fluffy carbon fiber layer to form a fiber ball. The second exhaust fan 404 exhausts air to form a negative pressure in the negative pressure box 401. The fiber ball that falls onto the fourth conveyor belt 403 is subjected to the negative pressure in the negative pressure box 401 to form a carbon fiber web tire of 200. The carbon fiber web tire reaches the extrusion unit 5 via the fourth conveyor belt 403.

[0074] Step 5: Weaving into felt

[0075] The carbon fiber web arrives at the extrusion unit 5, and after being extruded by the extrusion unit 5, arrives at the needling unit 6, and after being pre-needled and re-needled by the needling unit 6, finally a carbon fiber soft felt is made.

Claims

1. A carbon fiber production process, characterized in that: include A drying unit (1) is used to connect the carbon fiber filaments (103) drawn from the rolled carbon fiber filaments (102) to a drying machine (104), and to transport the carbon fiber filaments (103) after drying to the next process; A cutting unit (2) for cutting the carbon fiber filaments (103) delivered from the drying unit (1); A first negative pressure unit (3) is used to perform negative pressure treatment on the cut long carbon fiber filaments (103) transported from the cutting unit (2) to obtain a fluffy carbon fiber layer; A second negative pressure unit (4) is used to perform a secondary negative pressure treatment on the fluffy carbon fiber layer delivered from the first negative pressure unit (3) to obtain a carbon fiber web; An extrusion unit (5) is used to extrude the carbon fiber web transported from the second negative pressure unit (4); A needling unit (6) is used to perform pre-needling and re-needling treatments on the extruded carbon fiber web delivered from the extrusion unit (5); The drying unit (1) comprises a fiber roller (101), rolled carbon fiber filaments (102), carbon fiber filaments (103), a drying machine (104), a roller (105), and a diversion mechanism (106); the rolled carbon fiber filaments (102) are placed on the fiber roller (101); the carbon fiber filaments (103) are drawn from the rolled carbon fiber filaments (102); the carbon fiber filaments (103) are connected to the drying machine (104) through the diversion mechanism (106); the carbon fiber filaments (103) are connected to the roller (105) after passing through the drying machine (104); and the carbon fiber filaments (103) are transported to the cutting unit (2) through the roller (105); The cutting unit (2) comprises an adjustable column (201), a cutter (202), a first conveyor belt (203), a support (204), a control cabinet (205), a limit block (206), and a limit hole (207); the support (204) is provided with the first conveyor belt (203); the upper end of the support (204) is provided with a limit hole (207); the adjustable column (201) and the limit block (206) pass through the limit hole (207); the cutter (202) is provided at a side and below the adjustable column (201); and the control cabinet (205) is provided at the outer side of the support (204); The first negative pressure unit (3) comprises a second conveyor belt (301), an air intake box (302), a first air intake fan (303), a negative pressure pipe (304), a first exhaust fan (305), a discharge barrel (306), a third conveyor belt (307), and a first fan (308); an air intake box (302) is arranged at the end of the second conveyor belt (301); a negative pressure pipe (304) is arranged at the upper end of the air intake box (302); the end of the negative pressure pipe (304) is connected to the discharge barrel (306); a third conveyor belt (307) is arranged at the lower end of the discharge barrel (306); a first air intake fan (303) is arranged at the air intake end of the negative pressure pipe (304); a first exhaust fan (305) is arranged at the upper end of the discharge barrel (305); and a first fan (308) is arranged at the rear side of the air intake box (302); The second negative pressure unit (4) comprises a negative pressure box (401), a second fan (402), a fourth conveyor belt (403), a second exhaust fan (404), and a feed port (405); the front end of the negative pressure box (401) is provided with a feed port (405); the upper end of the negative pressure box (401) is provided with a second fan (402); the left end of the negative pressure box (401) is provided with a second exhaust fan (404); and the negative pressure box (401) is provided with a fourth conveyor belt (403) extending outside.

2. A carbon fiber production process according to claim 1, characterized in that , the carbon fiber filaments (103) are closely distributed on the outer wall of the drying machine (104).

3. A carbon fiber production process according to claim 1, characterized in that The cutter (202) winds the carbon fiber filaments (103) by rotating, and the adjustable column (201) cuts the wound carbon fiber filaments (103) by extrusion.

4. A carbon fiber production process according to claim 1, characterized in that The second conveyor belt (301) and the fourth conveyor belt (403) are arranged at an angle, and the fourth conveyor belt (403) is a grid-shaped conveyor belt.

5. A carbon fiber production process according to claim 1, characterized in that , the carbon fiber production process comprises the following steps: Step 1: Preparation First, a rolled carbon fiber filament (102) is fixedly placed on a fiber roller (101), and a carbon fiber filament (103) is extracted from the rolled carbon fiber filament (102). The extracted carbon fiber filament (103) passes through a diversion mechanism (106), a drying machine (104), and a roller (105) in sequence. The carbon fiber filament (103) is closely attached to the drying machine. The carbon fiber filament (103) that has passed the roller (105) is then connected to a cutter (202) of a cutting unit (2) and is wound along the surface of the cutter (202), thereby completing the preparation work. Step 2: Drying in a dryer Preheating the dryer to 180° C. After preheating, the dryer starts to rotate, drying the carbon fiber filaments (103) evenly while driving the carbon fiber filaments (103) to move; Step 3: Cutting with cutting machine The cutter (202) of the cutting unit (2) continuously winds the dried carbon fiber filaments (103) by rotating, and after winding to a certain thickness, the wound carbon fiber filaments (103) are squeezed by an adjustable column (201) located above the side of the cutter (202), and the wound carbon fiber filaments (103) are cut. The cut long carbon fiber filaments fall onto the first conveyor belt (203) and are transported to the first negative pressure unit (3) via the first conveyor belt (203); Step 4: Textile pretreatment The first conveyor belt (203) of the cutting unit (2) delivers the chopped carbon fiber filaments to the second conveyor belt (301) of the first negative pressure unit (3); the first fan (308) blows air to loosen the chopped carbon fiber filaments on the second conveyor belt (301); the first air intake fan (303) intakes air into the negative pressure pipe (304); the first air exhaust fan (305) exhausts air from the negative pressure pipe (304), and negative pressure is formed in the negative pressure pipe (304); the loosened chopped carbon fiber filaments enter the negative pressure pipe (304) and then reach the third conveyor belt (307) through the discharge cylinder (306), thereby forming a 20-meter fluffy carbon fiber layer; The fluffy carbon fiber layer on the third conveyor belt (307) enters the interior of the negative pressure box (401) through the third conveyor belt (307) from the feed port (405) of the second negative pressure unit (4), the second fan (402) at the upper end of the negative pressure box (401) performs secondary fluffing on the fluffy carbon fiber layer to form a fiber ball, the second exhaust fan (404) exhausts air, a negative pressure is formed in the negative pressure box (401), and the fiber ball that falls onto the fourth conveyor belt (403) is subjected to the negative pressure in the negative pressure box (401) to form a 200 mm carbon fiber mesh, and the carbon fiber mesh reaches the extrusion unit (5) via the fourth conveyor belt (403); Step 5: Weaving into felt The carbon fiber web arrives at the extrusion unit (5), and after being extruded by the extrusion unit (5), arrives at the needle punching unit (6), and after being pre-punched and re-punched by the needle punching unit (6), finally a carbon fiber soft felt is manufactured.

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