TWI647350B - Carbon fiber tow forming device and carbon fiber tow forming method - Google Patents

Abstract

The carbon fiber tow forming apparatus and the carbon fiber tow forming method of the present invention are characterized in that the outer and inner portions of the fiber tow are uniformly heated by inductive heating and microwave heating in the case of carbonizing the fiber tow, and the present invention The step of performing laser heating after microwave heating can heat the inside of the fiber tow, uniformly carbonize the graphitization function, and retract by the subsequent semi-mature impregnation fiber bundle stage; the induction heating and microwave heating method of the invention can The fiber tow is uniformly carbonized as a whole, and the time taken by the conventional heating method is short, which not only uniformly carbonizes the outer and inner portions of the fiber tow, but also accelerates the carbonization of the entire fiber tow.

Description

Carbon fiber tow forming device and carbon fiber tow forming method

The present invention relates to a fiber tow, and more particularly to a carbon fiber tow forming device.

The invention further relates to a carbon fiber tow forming method.

The conventional forming of the carbon fiber tow first melts the raw material into a filament and first carbonizes. Referring to FIG. 1, the fiber tow to be carbonized is first subjected to a dehumidification stage 110, and the dehumidification stage 110 includes a first vacuum dehumidification. Step 111, the first dew point dehumidification step 112, the second vacuum dehumidification step 113, and the second dew point dehumidification step 114, after the fiber tow is passed through the dehumidification stage 110, the moisture in the fiber tow is removed, and the dried fiber is obtained. The purpose of the tow;

After the fiber tow is dried by the dehumidification stage 110, the fiber tow is subjected to a first heating stage 120. The heating stage 120 is resistive heating or gas heating, and the first heating stage 120 includes a preheating step 121. a first heating step 122 and a second heating step 123, the preheating step 121 is to heat the fiber tow to 100 ̊C from room temperature, and the first heating step 122 is to heat the fiber tow by 100 ̊C. To 260 ̊C, the second heating step 123 heats the fiber tow from 260 ̊C to 500 ̊C, which is capable of stabilizing the fiber tow.

The heated filamentous raw material is sizing, dipped in the resin, and then dried, so that the outer layer of the filamentous raw material is coated with a layer of resin, and the total amount of the resin accounts for 5% to 6% of the filamentous raw material, thereby preventing the silk The raw materials are adhered to each other, and finally the filament-form raw material coated with the resin is wound up for subsequent carbonization.

Thereafter, the stabilized fiber tow is subjected to a second heating stage 130, which includes a third heating step 131 and a fourth heating step 132, the third heating step 131 is to 500 ̊C is heated to 1000 ̊C, and the fourth heating step 132 is to heat the fiber tow from 1000 ̊C to 1500 ̊C, and the second heating stage 130 is to carbonize the fiber tow.

Finally, the carbonized fiber tow is subjected to a third heating stage 140, which includes a fifth heating step 141 which heats the fiber tow from 1500 ̊C to 3000 ̊. C, the fiber tow is graphitized.

After the completion of the carbon fiber tow sizing, it can be sized according to different requirements, for example, pressing and heating the carbon fiber tow with a resin film, attaching the resin film to the carbon fiber tow, or immersing the carbon fiber tow In the resin; thereby, the carbon fiber tow can be sized in different ways depending on the manner of use.

However, the fiber bundle has a long carbonization time, and the first heating phase, the second heating phase, and the third heating phase are heated by resistance heating, so that the fiber tow is heated from the outside, and the fiber tow is heated. It is externally heated and carbonization starts from the outside. After a plurality of heating steps, the fiber bundle is carbonized, but since the fiber tow is carbonized from the outside, the internal carbonization of the fiber tow is different from the outside, resulting in the fiber tow. Uneven carbonization, and because the heating process of the fiber tow must be slowly heated, it takes 5 to 10 hours from the dehumidification stage 110 to the third heating stage to complete the graphitization of the fiber tow, resulting in the carbonization process of the aforementioned fiber tow. Uneven carbonization and lengthy carbonization time.

In view of the above, it is indeed necessary to provide a carbon fiber tow forming apparatus and a carbon fiber tow forming method to uniformly carbonize the fiber tow and to shorten the carbonization time.

The present invention provides a carbon fiber tow forming apparatus and a carbon fiber tow forming method, which are intended to uniformly carbonize a fiber tow and to take up the film.

Another object of the present invention is to reduce the overall carbonization time of the fiber tow.

In order to solve the foregoing problems, the present invention is a carbon fiber tow forming method comprising:

a dehumidification step of drying at least one fiber tow;

An inductive heating step of heating the at least one fiber tow to a temperature of 500 ̊C by induction heating to stabilize the at least one fiber tow;

a first microwave step of heating the at least one fiber tow by heating the temperature from 500 ̊C to 1000 ̊C in a microwave manner to carbonize the at least one fiber tow;

a second microwave step of heating the at least one fiber tow by heating the temperature from 1000 ̊C to 1500 ̊C in a microwave manner to graphitize the at least one fiber tow;

a laser step of heating the temperature from 1500 ̊C to 3000 ̊C, irradiating the at least one fiber bundle in a laser manner to uniformly graphitize the interior of the at least one fiber bundle;

a roughening treatment step of forming a plurality of holes in the surface of the at least one fiber tow;

a resin forming step of providing a resin and attaching it to the surface of the fiber tow in a high pressure manner, and the resin enters the inside of the at least one fiber bundle through a plurality of holes in the surface to make the surface and the inside of the at least one fiber tow Full of resin;

The half-aging forming step controls the temperature and pressure of the at least one fiber tow environment to make the resin on the surface and the inner portion of the at least one fiber tow semi-cooked.

The at least one fiber tow is uniformly heated by the microwave heating when the at least one fiber tow passes through the first microwave step and the second microwave step, and the at least one fiber tow passes the laser step again. The laser can be irradiated to the inside of the at least one fiber tow to uniformly heat the interior of the at least one fiber tow, so that the present invention can achieve the purpose of uniformly carbonizing the fiber tow.

Moreover, since the first microwave step and the second microwave step of the present invention are heated by microwaves, and the subsequent laser and semi-maturation steps, the overall process only takes about several tens of minutes, which is more expensive than the conventional heating method. In the time, the invention shortens the carbonization time of the fiber tow, and not only saves energy but also reduces the cost.

In order to enable your review committee to have a better understanding and understanding of the purpose, features and effects of the present invention, please refer to the following for a brief description of the following:

Referring to FIG. 1 to FIG. 7, the present invention is a carbon fiber tow forming apparatus, comprising:

a feeding unit 10, having a fiber tow raw material wheel 11, the fiber tow raw material wheel 11 provides at least one fiber tow 12;

a dehumidifying unit 20 is connected to the feeding unit 10, the dehumidifying unit 20 has a dehumidifying chamber 21, and the at least one fiber tow 12 passes through the dehumidifying chamber 21 to completely dry the at least one fiber tow 12;

An induction heating unit 30 is connected to the dehumidifying unit 20, the first induction heating unit 30 has an induction heating chamber 31, and the at least one fiber bundle 12 entering the induction heating chamber 31 is heated from room temperature by induction heating. 500 ̊C, stabilizing the at least one fiber bundle 12 in the induction heating chamber 31;

In the embodiment, the induction heating unit 30 further has a preheating chamber 32. The induction heating chamber 31 includes a first induction heating zone 311 and a second induction heating zone 312. The preheating chamber 32 communicates with the dehumidifying unit. 20 and the first induction heating zone 311, the temperature of the preheating chamber 32 is between room temperature and 100 ̊C, and the temperature of the first induction heating zone 311 is between 100 ̊C and 260 ̊C, the second The temperature of the induction heating zone 312 is located between 260 ̊C and 500 ̊C;

A first microwave heating unit 40 is connected to the induction heating unit 30. The first microwave heating unit 40 has a first microwave chamber 41. The at least one fiber bundle 12 entering the first microwave chamber 41 is heated by microwaves from 500. Heating 至C to 1000 ̊C to carbonize the at least one fiber bundle 12 in the first microwave chamber 41;

In this embodiment, the second induction heating zone 312 is connected to the first induction heating zone 311 and the first microwave heating unit.

The first microwave chamber 41 includes a first microwave region 411 and a second microwave region 412. The first microwave region 411 is connected to the second induction heating region 312. The temperature of the first microwave region 411 is 500. ̊C～850 ̊C, the temperature of the second microwave zone 412 is located at 850 ̊C~1000 ̊C;

A second microwave heating unit 50 is connected to the first microwave heating unit 40. The second microwave heating unit 50 has a second microwave chamber 51. The at least one fiber bundle 12 entering the second microwave chamber 51 is heated by microwaves. Heating at 1000 ̊C to 1500 ̊C to graphitize the at least one fiber bundle 12 in the second microwave chamber 51;

In this embodiment, the second microwave zone is in communication with the second microwave heating unit.

a laser unit 60, which heats the temperature from 1500 ̊C to 3000 ̊C, and communicates with the second microwave heating unit 50. The laser unit 60 has a laser carbonization chamber 61, and the laser carbonization chamber 61 enters the laser unit 61. The at least one fiber bundle 12 of the laser carbonization chamber 61 is graphitized by the laser light to the inside of the at least one fiber bundle 12;

A roughening processing unit 70 is connected to the laser unit 60. The roughening processing unit 70 has a negative pressure chamber 71. The negative pressure chamber 71 is provided with a roughening treatment member 72. The at least one fiber tow 12 is sent to In the negative pressure chamber 71, a continuous discharge gas is generated by the roughening treatment member 72, and a plurality of holes 12' are formed on the surface of the at least one fiber tow 12;

A resin forming unit 80 is connected to the roughening processing unit 70. The resin forming unit 80 has an extrusion device 81 having a delivery line 811 and an input line 812 for the delivery line 811. To transport the at least one fiber bundle 12, the input line 812 feeds a resin G into the transfer line 811 in a high pressure manner, so that the resin G infiltrates into the pothole 12' on the surface of the at least one fiber bundle 12. At least one fiber tow 12 inside;

The half-aging forming unit 90 is connected to the resin forming unit 80, and the semi-maturing forming unit 90 receives the at least one fiber bundle 12 output from the pressing device 81, and the semi-aging forming unit 90 controls temperature and pressure so that The at least one fiber tow 12 entering the semi-maturing forming unit 90 forms a semi-cured state;

A winding unit 100 is connected to the semi-curing forming unit 90 to wind up the at least one fiber bundle 12.

Referring to FIG. 3, the present invention further has a carbon fiber tow forming method, comprising:

a dehumidification step 22, drying at least one fiber tow 12;

An induction heating step 33, the at least one fiber tow 12 is heated by induction heating to 500 ̊C by induction heating to stabilize the at least one fiber tow 12;

In this embodiment, the induction heating step 33 includes a pre-heating step 331 , a first heating step 332 and a second heating step 333 , the pre-heating step 331 , the first heating step 332 , and The second heating step 333 is performed by induction heating. The pre-heating step 331 is to heat the at least one fiber bundle 12 from 0 ̊C to 100 ̊C, and the first heating step 332 is to at least a fiber tow 12 is heated from 100 ̊C to 260 ̊C, and the second heating step 333 is to heat the at least one fiber tow 12 from 260 ̊C to 500 ̊C;

a first microwave step 42, the at least one fiber tow 12 is heated in a microwave manner from 500 ̊C to 1000 ̊C to carbonize the at least one fiber tow 12;

In this embodiment, the first microwave step 42 includes a third heating step 421 and a fourth heating step 422, and the third heating step 421 and the fourth heating step 422 are both heated by microwaves. The third heating step 421 is to heat the at least one fiber tow 12 from 500 ̊C to 850 ̊C, and the fourth heating step 422 is to heat the at least one fiber tow 12 from 850 ̊C to 1000 ̊C. When the at least one fiber tow 12 is located between 500 ̊C and 1000 ̊C, the at least one fiber bundle 12 is carbonized;

a second microwave step 52, the at least one fiber bundle 12 is heated in a microwave manner from 1000 ̊C to 1500 ̊C to graphitize the at least one fiber tow 12;

a laser step 62, heating the temperature from 1500 ̊C to 3000 ̊C, irradiating the at least one fiber bundle 12 in a laser manner to uniformly graphitize the interior of the at least one fiber tow 12;

a roughening process step 73, the surface of the at least one fiber tow 12 is formed into the plurality of holes 12';

a resin forming step 82, a resin G is provided and attached to the surface of the fiber tow 12 in a high pressure manner, and the resin G enters the interior of the at least one fiber bundle 12 via a plurality of holes 12' of the surface, such that the at least one The surface and interior of the fiber tow 12 are filled with a resin G;

The half-aging forming step 91 controls the temperature and pressure of the environment of the at least one fiber bundle 12 such that the resin G on the surface and the inside of the at least one fiber tow 12 is in a semi-cured state.

Preferably, the present invention further has a winding step 101 for winding the at least one fiber tow 12 that has undergone the semi-maturing forming step 91, so that the at least one fiber tow 12 after winding can be supplied. Subsequent processing is used.

Since the at least one fiber tow 12 is heated by microwaves when passing through the first microwave step 42 and the second microwave step 52, the at least one fiber tow 12 is uniformly heated, and the at least one fiber tow 12 is further Through the laser step 62, the laser can be irradiated onto the interior of the at least one fiber tow 12, so that the interior of the at least one fiber tow 12 is also uniformly heated, so that the present invention can achieve uniform carbonization of the fiber tow 12 purpose.

Moreover, since the first microwave step 42 and the second microwave step 52 of the present invention are heated by microwaves, the overall process only takes about 30 minutes, compared to the time it takes to heat all inductively. The carbonization time of the fiber tow 12 is shortened.

Conventional knowledge

110‧‧‧Dehumidification stage

111‧‧‧First vacuum dehumidification step

112‧‧‧First dew point dehumidification step

113‧‧‧Second vacuum dehumidification step

114‧‧‧Second dew point dehumidification step

120‧‧‧First heating stage

121‧‧‧Preheating step

122‧‧‧First heating step

123‧‧‧Second heating step

130‧‧‧second heating stage

131‧‧‧ Third heating step

132‧‧‧ fourth heating step

140‧‧‧ Third heating stage

141‧‧‧ fifth heating step

this invention

10‧‧‧Feeding unit

11‧‧‧Fiber tow raw material wheel

12‧‧‧Fiber tow

12’‧‧‧ Potholes

20‧‧‧Dehumidification unit

21‧‧‧Dehumidification room

22‧‧‧Dehumidification step

30‧‧‧Induction heating unit

31‧‧‧Induction heating room

311‧‧‧First induction heating zone

312‧‧‧Second induction heating zone

32‧‧‧Preheating room

33‧‧‧Induction heating step

331‧‧‧Preheating step

332‧‧‧First heating step

333‧‧‧second heating step

40‧‧‧First microwave heating unit

41‧‧‧First microwave room

411‧‧‧First microwave zone

412‧‧‧second microwave zone

42‧‧‧First microwave step

421‧‧‧ Third heating step

422‧‧‧ fourth heating step

50‧‧‧Second microwave heating unit

51‧‧‧Second microwave room

52‧‧‧second microwave step

60‧‧‧Laser unit

61‧‧‧Laser carbonization room

62‧‧‧Laser steps

70‧‧‧Roughening unit

71‧‧‧ Negative pressure chamber

72‧‧‧Roughening treatment room

73‧‧‧Roughening steps

80‧‧‧Resin forming unit

81‧‧‧Extrusion device

811‧‧‧Transportation line

812‧‧‧Input line

82‧‧‧Resin forming step

90‧‧‧Semi-cooked forming unit

91‧‧‧Semi-cooking forming step

100‧‧‧Winding unit

101‧‧‧Winding steps

G‧‧‧Resin

Figure 1 is a conventional fiber tow carbonization step. 2 is a schematic structural view of the present invention in a preferred embodiment. 3 is a carbon fiber carbonization step of a preferred embodiment of the present invention. Figure 4 is a perspective view of a fiber tow forming impregnation process in accordance with a preferred embodiment of the present invention. Figure 5 is a schematic view of the fiber tow of the present invention in a preferred embodiment. Figure 6 is a schematic illustration of the roughening of the present invention in a preferred embodiment. Figure 7 is a schematic illustration of the completion of a fiber tow in accordance with a preferred embodiment of the present invention.

Claims (7)

A carbon fiber tow forming device comprising: a feeding unit having a fiber tow raw material wheel, the fiber tow raw material wheel providing at least one fiber tow; a dehumidifying unit communicating with the feeding unit, the dehumidifying unit having a dehumidifying chamber After the at least one fiber tow passes through the dehumidifying chamber, the at least one fiber tow is completely dried; an induction heating unit is connected to the dehumidifying unit, and the first inductive heating unit has an induction heating chamber and enters the inductive heating chamber. The at least one fiber tow is heated from room temperature to 500 ̊C by induction heating to stabilize the at least one fiber tow in the induction heating chamber; a first microwave heating unit is connected to the induction heating unit, the first The microwave heating unit has a first microwave chamber, and the at least one fiber bundle entering the first microwave chamber is heated by microwave heating from 500 ̊C to 1000 ̊C to carbonize the at least one fiber bundle in the first microwave chamber a second microwave heating unit communicating with the first microwave heating unit, the second microwave heating unit having a second microwave chamber entering the second microwave chamber At least one fiber tow is heated from 1000 ̊C to 1500 ̊C by microwave heating to graphitize the at least one fiber bundle in the second microwave chamber; a laser unit heats the temperature from 1500 ̊C to 3000 ̊C Connecting the second microwave heating unit, the laser unit having a laser carbonization chamber, the at least one fiber bundle entering the laser carbonization chamber, and the at least one fiber tow by the laser light The interior is graphitized; a roughening processing unit is connected to the laser unit, the roughening processing unit has a negative pressure chamber, and the negative pressure chamber is provided with a roughening treatment member, and the at least one fiber bundle is sent to the negative a plurality of potholes are formed on the surface of the at least one fiber bundle by generating a continuous discharge gas by the roughening treatment member; a resin forming unit communicating with the roughening processing unit, the resin forming unit having a An extrusion device having a delivery line for conveying the at least one filament number, and an input line for feeding a resin into the delivery line at a high pressure Passing the resin into the at least one fiber bundle from a pit of the surface of the at least one fiber tow; a half-aging forming unit communicating with the resin forming unit, the semi-maturing forming unit receiving the output from the extrusion device At least one fiber tow, the semi-curing forming unit controls temperature and pressure to form a semi-cured state of the at least one fiber tow entering the semi-curing forming unit; and a winding unit that communicates with the semi-curing forming unit At least one fiber tow is wound up. The carbon fiber tow forming apparatus according to claim 1, wherein the induction heating unit further has a preheating chamber, the induction heating chamber includes a first induction heating zone and a second induction heating zone, and the second induction heating The zone is connected to the first induction heating zone and the first microwave heating unit. The temperature of the preheating chamber is between room temperature and 100 ̊C, and the temperature of the first induction heating zone is between 100 ̊C and 260 ̊. C, the temperature of the second induction heating zone is located between 260 ̊C and 500 ̊C. The carbon fiber tow forming apparatus according to claim 1, wherein the first microwave chamber includes a first microwave region and a second microwave region, and the second microwave region is connected to the second microwave heating unit. The temperature of the first microwave zone is from 500 ̊C to 850 ̊C, and the temperature of the second microwave zone is from 850 ̊C to 1000 ̊C. A carbon fiber tow forming method, comprising: a dehumidifying step of drying at least one fiber tow; and an inductive heating step of heating the at least one fiber tow to a temperature of 500 ̊C by induction heating. Stabilizing the at least one fiber tow; in a first microwave step, heating the at least one fiber bundle to a temperature of 500 ̊C to 1000 ̊C in a microwave manner to carbonize the at least one fiber tow; In a second microwave step, the at least one fiber bundle is heated in a microwave manner from 1000 ̊C to 1500 ̊C to graphitize the at least one fiber tow; a laser step, the at least one fiber The beam is irradiated by laser to heat the temperature from 1500 ̊C to 3000 ̊C to uniformly graphitize the interior of the at least one fiber tow; a roughening treatment step of forming the surface of the at least one fiber tow into a plurality a resin forming step of providing a resin and attaching to the surface of the fiber tow in a high pressure manner, and the resin enters the inside of the at least one fiber bundle through a plurality of holes in the surface to make the at least one fiber tow And the internal surface of the filled resin; curing half forming step of controlling the temperature and pressure of the at least one fiber tow environment, the at least one resin fiber strands and internal surfaces was semi-cured state. The carbon fiber tow forming method according to claim 4, wherein the induction heating step comprises a pre-heating step, a first heating step and a second heating step, which are sequentially performed, the pre-heating step, the first The heating step and the second heating step are all heated by induction heating, and the pre-heating step is heating the at least one fiber tow from 0 ̊C to 100 ̊C, and the first heating step is to at least one The fiber tow is heated from 100 ̊C to 260 ̊C, and the second heating step is to heat the at least one fiber tow from 260 ̊C to 500 ̊C. The carbon fiber tow forming method according to claim 4, wherein the first microwave step comprises a third heating step and a fourth heating step, the third heating step and the fourth heating step are all in the form of microwaves Heating, the third heating step is heating the at least one fiber tow from 500 ̊C to 850 ̊C, the fourth heating step is heating the at least one fiber tow from 850 ̊C to 1000 ̊C, when When the at least one fiber tow is between 500 ̊C and 1000 ̊C, the at least one fiber tow is carbonized. The carbon fiber tow forming method according to claim 4, further comprising a winding step of winding the at least one fiber tow through the semi-aging forming step to make the at least one after winding The fiber tow can be used for subsequent processing.