JPH02191722A - Heat-treating device of precursor yarn - Google Patents

Abstract

PURPOSE:To improve production efficiency by placing yarn on a conveyor moving in a heat-treating furnace by a specific yarn take-off and feed device and receiving yarn by a specific receiving device at the outlet of the furnace. CONSTITUTION:Yarn is placed on a conveyor 7 moving in a heat-treating furnace 6 by a take-off and feed device which takes-off and feeds yarn while rocking the yarn simultaneously in two dimensions in the advance direction of the conveyor and in the width direction. A rotary table 38 carrying a receiver 39 is set at the conveyor edge at the outlet of the furnace and heattreated yarn is received. A connecting conveyor 36 may be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for heat treating precursor fibers obtained by spinning. Especially pitch-based carbon! ! ! Fibers, such as fiber precursors, which have very low strength immediately after spinning and are prone to breakage and fluffing, are loaded onto a conveyor that moves inside a heat treatment furnace, and after leaving the heat treatment furnace in that state, they are transferred onto the conveyor. Relating to a device for receiving a load of fibers from.

[Conventional technology]

The following method has been proposed for continuous heat treatment of the brittle precursor long fibers immediately after spinning as described above.

That is, according to Japanese Patent Application Laid-Open No. 62-90306, the precursor fibers obtained by spinning are immediately loaded continuously in a substantially rectangular wave shape onto a conveyor attached to a heat treatment furnace, and in this state, they are subjected to a prescribed heat treatment. After leaving the furnace, the heat-treated fibers on the conveyor are continuously and sequentially unwound using a Nelson roller or the like, and then wound up by a winding machine.

Incidentally, in general, the wound yarn is unwound in the next step of carbonization and graphitization while being fed to a carbonization and graphitization furnace.

[Problem to be solved by the invention]

JP-A No. 62-90306 has the problem that the material is continuously stacked on a conveyor in a substantially rectangular wave shape, so the amount of material to be loaded per unit area is small and the heat treatment efficiency is low. Furthermore, at the exit of the furnace, the fibers on the conveyor after heat treatment are unrolled and wound up, but this unwinding and winding speed must be approximately the same as the spinning speed; The speed is often as high as several looms/min, and production problems due to yarn breakage during unwinding and winding, as well as damage to the yarn such as fuzz, are likely to occur. Further, since the precursor fiber is fragile, sufficient winding tension cannot be applied to it, so when winding it onto a bobbin, it cannot be wound thickly and the loft cannot be increased.

An object of the present invention is to provide a precursor fiber heat treatment device that can dramatically improve production efficiency compared to conventional methods.

[Means to solve the problem]

The structure of the present invention for achieving the above object is as follows. Above the conveyor in front of the furnace entrance of the conveyor moving inside the heat treatment furnace, there is provided a take-up and supply device that takes up the fibers and supplies them onto the conveyor while swinging two-dimensionally in the conveyor traveling direction and width direction at the same time, and at one end of the furnace exit conveyor. A rotating table equipped with a receiver for receiving the heat-treated fibers on the conveyor, or a transfer conveyor for receiving the heat-treated fibers on the conveyor and a receiver for receiving the fibers transferred to the transfer conveyor. A heat treatment apparatus for precursor fibers, characterized in that a table is provided.

〔Example〕

Next, the present invention will be explained using examples and with reference to the drawings.

FIG. 1 shows one embodiment of a fiber take-off and supply device according to the present invention.

The precursor fiber 2 that is continuously spun from the spinning nozzle 1 is
The fibers are taken up by a take-up roll 3 and guided to the fiber take-up and supply device 5 of the present invention. The fiber 2 is wound around a guide roll 14 that simultaneously swings two-dimensionally in the conveyor traveling direction (hereinafter referred to as the Y direction) and in the comparator width direction (hereinafter referred to as the X direction) and rotates in a polarized manner. The fibers are guided to a fiber take-up device 15 that swings two-dimensionally in the X and Y directions together with the fibers 14, and are loaded onto a conveyor 7 that moves within the heat treatment furnace 6 while being traversed simultaneously in the X and Y directions.

The fibers 2 are loaded onto a conveyor 7 in front of the furnace entrance, and then continuously introduced into the heat treatment furnace 6 together with the conveyor.

The guide roll 14 and the fiber puller 15 are
, a trajectory as shown in 33 is drawn by the Y two-dimensional swing mechanism.

Next, the two-dimensional swing mechanism and the rotating mechanism of the guide roll 14 will be explained.

The entire fiber take-off and supply device 5 includes a mechanism for two-dimensionally swinging the guide roll 14 and the fiber take-off device 15 in the X and Y directions simultaneously, and a mechanism for rotating the guide roll 14. In other words, the Y-axis axis IU installed on the pedestal 9
A table 11 is placed on top, and the table 11 is connected to an eccentric cam 26 via a joint 27, and reciprocated in the Y direction by a motor 22 via a belt 23 and a shaft 19.

The table 13 installed on the X-axis seal 12 installed on the table mitt is equipped with a guide roll 14 and a fiber puller 15, and one end is fitted with a sliding jig ( (not shown).

The camshaft 31 is rotated in one direction by the motor 28 via the belt 29, and the table 13 reciprocates in the X direction in an area where the cam groove 32 is provided.

The table 13 and the table 11 reciprocate independently and simultaneously, and the guide roll 14 and fiber puller 15 riding on either of these tables draw a trajectory as shown at 33.

Further, the guide roll 14 is driven by a motor 16 mounted on the table 11 to move the belt 20 and the Boo'J-17,1.
8, 21, 24 in the direction of the arrow.

By reciprocating the entire guide roll rotation mechanism together with the guide roll 14 in the Y direction, the belt 20 can be driven without bending or even coming off the pulleys 17, 18, 21, and 24.

The traverse distance in the X direction is determined by the installation length of the cam groove 32.

The Y-direction traverse distance is determined by the stroke of the eccentric cam 26, and the stroke is set to be greater than the fiber 20 transfer head generated in the rotary table collecting device section of the present invention, which will be described later.

Note that the fiber take-off device 15 may be any device that can prevent the fibers from being wrapped around the guide roll 14, such as an air sucker, and has the function of supplying the fibers 2 onto the conveyor 7. As the conveyor 7, a breathable metal net conveyor is used.

The take-up and supply device of the present invention is configured to be able to perform simultaneous traverse in the Y direction in addition to traverse in the
(n, traverse speed is 5 m/min in the X direction, 5 Q m/n+in in the Y direction, ) The traverse distance is approximately the same as the conveyor width in the X direction, and the transfer head caused by the rotary table collecting device section described later in the Y direction. 1, which is a greater distance
0~60cm, conveyor speed 0, 1 rrx/min
If this is the case, the fibers will be deposited with a three-dimensional spread as shown in Figure 2 (a), so the newly loaded fibers will be piled up on the slope formed by the already loaded fibers, and one end will also touch the conveyor surface. This allows for stable loading as shown in Figure 2 (1)) without collapsing even under heavy loads. From this, it is possible to achieve a dramatic improvement in heat treatment efficiency compared to conventional methods.

Next, one embodiment of a device for receiving heat-treated fibers on a conveyor according to the present invention is shown in FIG.

At the end of the conveyor 7 behind the exit of the heat treatment furnace 6, there is provided a transfer conveyor 36 to which the heat-treated fibers 2 on the conveyor 7 transfer, and at the bottom of the end of the transfer conveyor 36,
A rotary table 38 is provided with a receiver 39 for receiving the fibers 2 transferred to the transfer conveyor 36. The transfer conveyor 36 is connected to the conveyor 7 by the motor 37.
It rotates in the same direction at almost the same speed. Incidentally, the transfer conveyor 36 can be omitted and a rotary table 38 on which the receiver 36 is mounted can be provided below the end of the conveyor 7.

FIG. 4 shows a detailed example of the implementation of the rotary table 38. The rotary table 38 carrying the receiver 39 is connected to the motor 40 . It is provided with a fluid cylinder 42 that is rotated in the same direction as the conveyor 7 by a speed reducer 41, detects its position every rotation, and lowers the conveyor a certain distance. The Y-direction traverse distance of the take-up and supply device 5 is set to be greater than the transfer head of the fibers 20 that occurs in the rotary table collecting device section, and the fibers are taken and supplied onto the conveyor 7 in the situation shown in Fig. 2. Since the fibers 2 on the conveyor have been loaded, the fibers 2 that have been heat-treated descend along the end roll 35, leave the conveyor surface at the vertical line, and land on the transfer conveyor 36, where the fiber layer is turned upside down. And you can transfer without getting tangled. Transfer from the transfer conveyor 36 to the rotating receiver 39 is performed in the same manner.

In this way, the fibers 2 on the conveyor 7 can be transferred continuously to the receiver 39 as shown in section 2, and the fibers 2 on the receiver 39 have a width jf equal to the loading width on the conveyor. It is received like a donut. The rotary table 38 detects its rotational position with a detector (not shown) every rotation, and is lowered by a fluid cylinder 42 by a distance corresponding to the height of one layer of fibers, so that the rotary table 38 sequentially and continuously moves onto the first layer of fibers. It can be stacked and collected. - In boat fishing, cleaning of the nozzle surface is carried out almost regularly during the main process of spinning, and at this time, the supply of fibers 2 to the conveyor 7 is stopped for a short time, so the ends of the yarn loaded on the conveyor naturally appear. Therefore, the receiver 3 is designed so that it can receive the amount spun every 1 to 10 hours as a unit.
It is desirable to determine the dimensions of 9. In addition, the collected fibers are transferred to each receiver step, and after arranging a plurality of receivers filled with m-fibers, 0.5% of the collected fibers are removed from the thread end of the top layer of each receiver.
It is fed into a heat treatment furnace for carbonization, graphitization, etc. while being unwound at a relatively low speed of ~10 rn/min.

In this way, the collection device based on the rotary table after the heat treatment furnace 6 can omit the high-speed unwinding and winding of the heat-treated fragile precursor debris on the conveyor, so it can eliminate production problems and fluff caused by system breakage. It is possible to prevent fiber damage such as Furthermore, since the fibers on the conveyor 7 can be collected continuously in one layer or multiple layers in a donut shape on the receiver 39 loaded on the rotary table, compared to the conventional method of unwinding and winding. It can be made into a dramatically larger loft and supplied to the next process such as carbonization and graphitization furnaces.

In this example, the process from spinning to heat treatment is described as a continuous process. It is effective in both cases of loading and heat treatment.

〔Effect of the invention〕

As explained above, after the fibers are loaded on the conveyor moving inside the heat treatment furnace and heat treated in that state, the fibers are taken up and supplied on the conveyor at one end of the furnace exit conveyor. The device and the receiving device using a rotary table are effective in dramatically improving production efficiency and producing high-quality fibers.

[Brief explanation of the drawing]

FIG. 1 is a bird's eye view showing one embodiment of the fiber take-off and supply device of the present invention. FIG. 2 is a diagram showing a two-dimensional traverse loading shape, which is a feature of the present invention, when fibers are loaded using the apparatus shown in FIG. FIG. 3 is a diagram showing the fiber transfer state until the heat-treated fibers on the conveyor are received into the receiver. FIG. 4 is a diagram showing a rotary table on which the receiver of the present invention is mounted. 1... Spinning nozzle, 2... Fiber, 3...
Take-up roll, 4, 16.22.28.37.40... motor, 5
... Entire collection and supply device, 6...F, ?・・・Conveyor Death・
・Strut, 9... Frame, 10... Y-axis seal, 1143... Table, 12... X-axis seal, 14... Guide roll, 14... Fiber puller, 17, IL21- 25, 24.30...Pulley 19
...Shaft, 20.23.29...Belt, 26...Eccentric cam, 27...Joint, 31...Camshaft, 32...Cam groove, 33...Fiber puller Trajectory, 34...Fiber loading shape, 35...Conveyor end roll, 36...Transfer conveyor, 38...Rotary table, 39...Receiver, 41...
...Reducer, 42...Fluid cylinder (a) 2nd leap

Claims (1)

[Claims] Above the conveyor in front of the furnace entrance of the conveyor moving inside the heat treatment furnace, there is installed a take-up and supply device that simultaneously swings two-dimensionally in the direction of conveyor movement and in the width direction to take up the fibers and supply them onto the conveyor. A rotary table equipped with a receiver for receiving the heat-treated fibers on the conveyor is provided, or a transfer conveyor is provided for receiving the heat-treated fibers on the conveyor, and a receiver is provided for receiving the fibers transferred to the transfer conveyor. 1. A heat treatment apparatus for precursor fibers, characterized in that a rotary table is provided.