JP3204775B2 - Method of adjusting yarn count of precursor of pitch-based carbon fiber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention separates yarn counts by spinning while maintaining the spinning amount of a pitch-based carbon fiber precursor at a maximum production capacity, and continuously performs infusibilization. For adjusting the yarn count of the precursor of pitch-based carbon fiber for use in the present invention.

[0002]

2. Description of the Related Art At present, in pitch-based carbon fibers using pitch as a raw material, a precursor of pitch-based carbon fibers discharged from a spinning nozzle is plied (or split) by a yarn count adjusting member such as a rotating drum or a roller. ) To separate the yarn count. At this time, the spinning amount of one spinning nozzle is 3K.
(1K = bundle of 1000 strands, so 3K = 30
It becomes a bundle of 00 strands. In the case of producing a 12K count yarn as a thick count yarn in the case of having a production capacity of discharging the same as in the following, four spinning nozzles are required as production equipment (one yarn count adjusting member is required). yarn). next,
When using the above production equipment to produce 6K count, 1
The number of spinning nozzles per yarn is two, and two yarns can be produced (2
In the same way, when producing 3K-count yarn, the number of spinning nozzles per yarn is one, and
Yarn can be produced (combined yarn with 4 yarn count adjusting members),
When producing 1K count, the spinning nozzle per thread is 1 /
Three yarns can be produced and 12 yarns can be produced (spun yarn with 12 yarn count adjusting members).

[0003] As a method for infusibilizing the yarn thus formed into a count as required, conventionally, the yarn is once collected in a container, and the container is conveyed to an infusibilizing furnace to be infusibilized. A processing method is disclosed in JP-A-61-130182. According to this method, the yarns obtained by using the spinning equipment can be collectively collected, and the infusibilization treatment can be performed for each collected container.

However, Japanese Patent Application Laid-Open No. 61-130182
In the case of method (1), the heat capacity of the container is large and there is a heat loss.A large amount of yarn cannot be loaded due to the capacity of the container, and the yarn must be cut for each container. In addition, the processing time from spinning to infusibilization increases. Also, the precursor of the pitch-based carbon fiber before being subjected to the infusibilization treatment is weak in terms of strength, causing thread breakage or fuzzing when collected in a container, or unwinding the yarn from the container after the infusibilization treatment. At this time, there is a problem that the strands of the yarn become entangled or cause fluffing, which is not preferable. Therefore, in place of the above-mentioned container collecting method, as a method of infusibilizing the above-mentioned count yarn, the yarn formed into a count as needed is immediately loaded on a conveyor attached to the infusibilization furnace immediately. In this state, an apparatus for carrying out infusibilization treatment by transferring to a continuous infusibilizing furnace is disclosed in JP-A-62-90306 and JP-A-2-191.
No. 722. According to this apparatus and the like, since the spinning process and the infusibilization process can be performed continuously, it is possible to prevent the occurrence of yarn breakage, fluffing, entanglement, and the like.

[0005] However, when the apparatus disclosed in Japanese Patent Application Laid-Open Nos. 62-90306 and 2-191722 is used, regardless of the size of the machine, the continuous material is placed on a conveyor attached to the infusibilizing furnace. Each of the stacking processing capacities that can be stacked is one thread. Therefore, if all the installed spinning equipment is used and all the yarns (from one yarn to multiple yarns) that are obtained without lowering the spinning capacity are to be loaded at one time, the number of yarns obtained by adjusting the yarn count will be met. It is necessary to install infusibilizing furnaces in parallel, but there is a problem in that the expansion of the infusiblizing furnaces requires an extremely large amount of capital investment. In order to adjust the production capacity of the installed spinning equipment, it is necessary to discharge the spinning amount required for the production of one yarn according to the yarn count, and when producing yarn with a small yarn count, There are problems such as extremely low spinning ability (productivity).

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to separate yarn counts by spinning while maintaining spinning ability, and to continuously perform infusibilization regardless of the number of yarns obtained. An object of the present invention is to provide a method for adjusting the count of a pitch-based carbon fiber precursor that can be performed.

[0007]

Means for Solving the Problems In order to achieve the above objects, the present inventors have conducted intensive studies on a method of adjusting the yarn count of a precursor of pitch-based carbon fiber, and as a result, a precursor obtained from a spinning facility has been obtained. The yarns are separated or split into one or multiple yarns by a yarn count adjusting member provided on a conveying path to the infusibilizing furnace, and then a conveying device attached to the infusibilizing furnace. A yarn take-up / supply device comprising at least two yarn take-up members attached to a two-dimensional swing member that simultaneously swings two-dimensionally in the traveling direction and the width direction of the transfer device. Regardless of the number of yarns, by continuously loading the yarns on the conveying device, the spinning ability can be maintained at a high level, and a high-quality yarn with extremely few yarn breaks and fuzzing can be produced. To find out what can be done, and to complete the present invention based on this finding. Is that Tsu.

[0008] An object of the present invention, the hand performing the heat treatment by continuous infusible furnace 1 yarn to Taitojo obtained repeats division Rizo by the spinning yarn processing (1) Pitch-based carbon fibers
As a step, above the transfer device attached to the infusibilizing furnace,
Simultaneous two-dimensional swinging in the traveling direction and width direction of the transfer device
At least the thread take-up member attached to the two-dimensional swing member
Using a yarn take-up and supply device with two units installed,
This can be achieved by a method of adjusting the yarn count of the precursor of the pitch-based carbon fiber, which is characterized by being loaded on a table.

[0009]

The method of adjusting the yarn count of the pitch-based carbon fiber precursor of the present invention will be described in more detail with reference to the drawings.

FIG . 1 shows a specific example of a precursor processing apparatus disclosed in Japanese Patent Application No. 4-297259.
A two-dimensional oscillating member that oscillates two-dimensionally simultaneously in the traveling direction and the width direction of the transporting device is provided above the transporting device attached to the infusibilizing furnace, and the yarn pulling attached to each two-dimensional oscillating member is provided. FIG. 2 is a use state diagram schematically illustrating a configuration of an embodiment of a yarn take-up / supply device provided with four take-up members.

As a two-dimensional oscillating member, a moving member that moves in a traveling direction of a conveying device attached to the infusibilizing furnace 33 (hereinafter, also simply referred to as a Y direction) is used as the yarn take-up and supply device 5 shown in FIG . On the X-axis rail 12 installed on the table 11 constituting the
Table 13 which constitutes a moving member that moves in the direction 13), four thread take-up members are installed on the table 13, and the table 13 swings in the X direction of the conveyor 6 as the transfer device. In addition, each of the yarn take-up members has a control mechanism (not shown) so as not to interfere with each other, and all of them move with the same displacement and the same cycle.

Therefore, the respective yarns 4 stacked on the conveyor 6 are stacked in parallel in the X direction of the conveyor 6 by four yarn take-up members connected to the table 13. Since each of the yarns 4 has a three-dimensional spread, no entanglement or entanglement occurs, and an overlapping portion between the yarns stacked in parallel (a case where there is no overlapping portion between the yarns stacked in parallel. Also has a three-dimensional spread,
No entanglement or entanglement occurs, including the overlapping portion between the yarns, and the whole can be loaded extremely well.

Next, the two-dimensional swinging mechanism of the two-dimensional swinging member and the rotating mechanism of the guide roll 14 constituting the thread taking-up member provided in the yarn taking-up / supplying device 5 will be described.

First, the two-dimensional swinging member is constituted by a moving member moving in the Y direction and a moving member moving in the X direction.

As a Y-direction moving mechanism using a moving member that moves in the Y-direction, first, a table 11 is placed on a Y-axis rail 10 installed on a gantry 9 supported by a support 8,
The table 11 is connected to an eccentric cam 26 through a joint 27, and the belt 22 and the shaft 19 are
Through a mechanism that reciprocates in the Y direction via

Further, X by the moving member moving in the X direction
As a direction moving (swinging) mechanism, a table 13 installed on the X-axis rail 12 on the table 11 is arranged, and one end of the table 13 slides in a cam groove 32 formed in a cam shaft 31. The camshaft 31 is also rotated in one direction by a motor 28 via a belt 29 so that the area where the table 13 is provided in the cam groove 32 is also provided. This is a mechanism that reciprocates in the X direction.

As a result of the above mechanisms, the table 13 and the table 11 are independently and simultaneously reciprocated in the X direction and the Y direction, respectively. It is obtained.

Each of the guide rolls 14a to 14d and each of the yarn take-off devices 15a to 15d which constitute the yarn take-up member.
15d means that the yarns 4 can be separately loaded while drawing the tracks 7a, 7b, 7c, 7d on the conveyor 6 while moving the yarns 4 in conjunction with the movement of the two-dimensional swinging member. The dimensional swing member is provided continuously.

Next, the guide roll 14 is rotated by a motor 16 mounted on the table 11 through a belt 20 and pulleys 17, 18, 21 and 25 in the direction of the arrow shown in FIG. Pulley 1
The guide rollers 14a to 14d attached to the roller 8 are rotated at the same rotation speed. Here, each pulley 1
7, 18, 21, and 25, the pulleys 18 and 25 reciprocate in the X direction integrally with the table 13 to change the positional relationship between the pulleys and the shape of the traveling path of the belt 20. The belt 20 also has pulleys 17, 18,
Guides and the like are formed so as to be able to drive without deviating from 21 and 25.

Next, the traverse distance in the X direction is determined by the installation length of the cam groove 32 of the cam shaft 31, and the traverse distance in the Y direction is determined by the stroke of the eccentric cam 26.

The yarn take-up device 15 is, for example, an air soccer, which can prevent the yarn from being wound around the guide roll 14 and has a function of supplying the yarn 4 onto the conveyor 6. What is necessary is just to be sufficient, and as a conveyance apparatus, a metal net conveyor etc. which has ventilation can be used.

In the yarn take-up and supply device 5 shown in FIG. 1 which is used in the yarn count adjusting method for the pitch-based carbon fiber precursor of the present invention, in addition to the X-direction traverse, the Y-direction simultaneous traverse is also performed. For example, the transport speed of the yarn 4 that is continuously transported is 200 to 500 m / min, and the traverse speed is X.
Direction is 3-10m / min, Y direction is 20-60m / m
The traverse distance in the in and X directions is almost the same as the width obtained by dividing the width of the conveyor by the number of thread take-up members provided in parallel in the X direction of the conveyor . For example, as shown in FIG. When the number of the thread take-up members is four, the X direction is 1/4 of the width of the conveyor, and the overlapping portion between the yarns 4 stacked in parallel in the X direction is in a range of -50 mm (gap) to 100 mm. And the traverse distance in the Y direction is 10 to 60 c
m range, and the conveyor speed is 3 to 10 m / min. As a result, the yarn 4 can be deposited with a three-dimensional spread, and the newly loaded yarn 4 is loaded on the slope formed by being already loaded, and one end of the yarn 4 is also landed on the conveyor 6 surface, so that a high load is obtained. Even if it does not collapse, stable loading becomes possible.

[0023]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. In the description of the drawings showing each embodiment of the following examples, the same members as those used in FIGS. 1 and 2 are denoted by the same reference numerals unless otherwise specified. In addition, the same device as in FIG. 2 was used as the yarn take-up / supply device. Therefore, description (including reference numerals) of the device is omitted except for a part.

Example 1 FIG. 2 shows a case where four spinning nozzles were used, and the precursor discharged from each spinning nozzle was provided on the transport path to the infusibilizing furnace.
The yarn is adjusted by using the yarn count adjusting member of the table appropriately, adjusted to a desired count, and simultaneously rocked two-dimensionally in the X direction and the Y direction above the transfer device attached to the infusibilizing furnace. A two-dimensional swing member is provided, and using a yarn take-up / supply device including four yarn take-up members attached to the two-dimensional swing member,
FIG. 4 is a use state diagram schematically illustrating a configuration of one embodiment of a yarn count adjusting method for a pitch-based carbon fiber precursor of the present invention in which the yarn is loaded on the transport device.

FIG . 2 shows that the spinning nozzle 1 used for adjusting the yarn count of the pitch-based carbon fiber precursor of this embodiment is as follows.
Four spinning nozzles 1 having 3,000 pores and a pore diameter of 120 μm were arranged.

Next, the precursor 2 continuously discharged from the spinning nozzles 1a to 1d at a spinning speed of 300 m / min is supplied to seven yarn count adjusting members installed below the spinning nozzles 1a to 1d. The precursor 2 discharged from each one of the spinning nozzles 1a to 1d is supplied to four of the rotary drums 3a to 3g (rotary drum diameter 180 mm) (3a, 3c, 3e, and 3f). It is distributed to the corresponding rotary drums 3a, 3c, 3e and 3f, and 3000 precursors 2 are combined on each rotary drum to form a 3K-number yarn 4 (four yarns). A rotating drum (not shown) provided on the transport path behind the rotating drum
(Rotary drum diameter: 150 mm, number of rotation: 637 rpm), and the respective yarns 4 were continuously conveyed to the yarn take-up / supply device 5 to be connected to the next infusibilization process.

Thereafter, the yarn 4 is made up of a two-dimensional rocking member that simultaneously rocks two-dimensionally in the X direction and the Y direction, and a yarn take-up member connected to the two-dimensional rocking member. Each of the yarns is separately wound around positively rotating guide rolls 14a to 14d constituting a yarn taking-up member connected to a table 13 constituting a two-dimensional swing member on the provided yarn taking-up / supplying device 5. After being turned, the yarn is guided to yarn take-up devices 15a to 15d which also constitute a yarn take-up member,
While being traversed upward in the X direction and the Y direction at the same time, they were stacked on the conveyor 6 in front of the furnace entrance, conveyed into the infusibilizing furnace 33, and infusibilized.

Example 2 In the same manner as in Example 1, instead of using the spinning and infusibilizing apparatus shown in FIG.
Except that two 6K-count yarns were produced, the 6K-count yarn was adjusted and infusibilized in the same manner as in Example 1.

That is, each of the two spinning nozzles 1a
And 1b, and precursors 2 discharged from 1c and 1d are distributed to one rotating drum 3b and 3f, respectively, and 6000 precursors 2 are threaded on each rotating drum 3b and 3f to be 6K-th. The yarn is divided into yarns 4 (two yarns), and then passed through a rotary drum provided on a transport path behind each rotary drum, and each yarn is supplied to a yarn take-up / supply device 5 to be connected to the next infusibilization process. Article 4 was conveyed continuously.

Thereafter, the yarn 4 is transferred to the guide roll 14 connected to the table 13 on the yarn take-up and supply device 5.
After being wound separately for each of the yarns a and 14c, the yarns were guided to the yarn take-off devices 15a and 15c, loaded on the conveyor 6, conveyed into the infusibilizing furnace 33 and infusibilized.

[0031] using a spinning and infusible processing apparatus such as also shown in FIG. 2 and Example 3 Example 1, instead of producing 4 yarn to 3K count yarn,
A 12K-count yarn was adjusted and infusibilized in the same manner as in Example 1 except that one 12K-count yarn was produced.

That is, the precursor 2 discharged from the four spinning nozzles 1a to 1d is collected on one rotating drum 3d,
On the rotating drum 3d, 12,000 yarns of the precursor 2 are combined to form a 12K-number yarn 4 (1 yarn), and then the yarn 4 is formed on a rotating drum provided on a conveying path behind the rotating drum. Then, the respective yarns 4 were continuously conveyed to the yarn take-up / supply device 5 to be connected to the next infusibilization process.

Thereafter, the yarn 4 is transferred to the guide roll 14 connected to the table 13 on the yarn take-up and supply device 5.
After being wound around b, it was guided to the yarn take-off device 15b, loaded on the conveyor 6, and transported into the infusibilizing furnace 33 to be infusibilized.

As described above, from Examples 1 to 3, the yarn count is adjusted by using the method of the present invention, and the infusibilizing treatment is continuously performed. No problems such as yarn breakage, fluffing, etc. occurred in the yarn, and it was confirmed that a very high quality yarn was obtained.

Further, while keeping the production capacity of the spinning nozzle 1, it is possible to produce different counts by the spinning process. Further, the obtained yarns 4 are successively loaded while traversing simultaneously in the X direction and the Y direction. This makes it possible to deposit with a three-dimensional spread, and that the newly loaded yarn 4 is loaded on the slope already formed and formed, and one end is also landed on the conveyor 6 surface, so that even if it is loaded at a high level, it will break down. It was also confirmed that the cargo could be stably loaded without any problem.

[0036]

According to the yarn count adjusting method of the present invention, the required yarn count can be freely manufactured without lowering the production capacity. In addition, there is no fear of yarn breakage or fluffing when performing split yarn or ply yarn, and the count can be adjusted without difficulty. Further, since the process from the spinning nozzle to the infusibilization process can be performed on-time, there is little time loss and no labor is required.

[Brief description of the drawings]

FIG. 1 shows a means for continuously heat-treating one or multiple yarns in an infusibilizing furnace, above a transporting device attached to the infusibilizing furnace, simultaneously in the traveling direction and the width direction of the transporting device. A two-dimensional swinging member that performs two-dimensional swinging is provided, and the configuration of one embodiment of a yarn taking-up / supplying device in which four yarn taking-up members attached to each two-dimensional swinging member are installed is schematically shown. FIG.

FIG. 2 shows a configuration in which four spinning nozzles are used, and a precursor discharged from each spinning nozzle is provided on a transport path to an infusibilizing furnace.
The yarn is adjusted by using the yarn count adjusting member of the table appropriately, adjusted to a desired count, and simultaneously rocked two-dimensionally in the X direction and the Y direction above the transfer device attached to the infusibilizing furnace. A two-dimensional swing member is provided, and using a yarn take-up / supply device including four yarn take-up members attached to the two-dimensional swing member,
FIG. 4 is a use state diagram schematically illustrating a configuration of one embodiment of a yarn count adjusting method for a pitch-based carbon fiber precursor of the present invention in which the yarn is loaded on the transport device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Spinning nozzle 2 ... Precursor 3 ... Rotary drum 4 ... Thread 5 ... Thread pick-up supply apparatus 6 ... Conveyor 7 ... Track 8 ... Support | pillar 9 ... Stand 10 ... Y-axis rail 11, 13 ... Table 12 ... X-axis rail 14: Guide roll 15: Yarn take-up device 16, 22, 28: Motor 17, 18, 21, 2
4, 25, 30 Pulley 19 Shaft 20, 23, 29 Belt 26 Eccentric cam 27 Joint 31 Camshaft 32 Cam groove 33 Infusible furnace

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Yoshito Yamazaki 20-1 Shintomi, Futtsu City, Chiba Prefecture Nippon Steel Corporation Technology Development Division Equipment Technology Center (72) Inventor Tetsuya Yamamoto 20 Futtsu City, Futtsu City, Chiba Prefecture -1 Nippon Steel Corporation Technology Development Headquarters Equipment Technology Center (56) References JP-A-60-259632 (JP, A) JP-A-59-43113 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) D01F 9/08-9/32 D01D 1/00-13/02

Claims (1)

(57) [Claims] As claimed in claim 1 pitch system means for performing continuous heat treatment by infusible furnace 1 yarn to Taitojo obtained repeats division by Rizo in spinning yarn processing carbon fiber, it was attached to the infusibilized furnace
Above the transport device, in the traveling direction and the width direction of the transport device
Threading attached to a two-dimensional oscillating member that simultaneously oscillates two-dimensionally
Yarn take-off supply comprising at least two take-up members
A method for adjusting the yarn count of a precursor of pitch-based carbon fiber, wherein the yarn count is loaded on a conveying device using the device .