JPS6290307A - Method for taking up fiber precursor - Google Patents

Abstract

PURPOSE:Extruded fiber precursors are taken up with a plurality of positively rotating rollers, a false-twisting air nozzle which is set downstream of the rollers and a funnel to make it possible to produce fibers of high quality without damage in high efficiency. CONSTITUTION:Fiber precursors continuously extruded from the head 2 are taken up with a plurality of positively rotating rollers 3, 6. Then, precursors are guided by the false-twisting nozzle 8 which has been set near the downstream of at least one of the rollers and the funnel 7 which is set the most downstream of the rollers and sent into the heat treatment move. Thus, the wrapping of the precursor around the rollers are reduced and the precursors are prevented from entangling and breaking.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for collecting precursor fibers obtained by spinning fiber-forming raw materials.

In particular, the present invention relates to a method for collecting precursor fibers for loading onto a conveyor belt prepared for directly introducing the precursor fibers immediately after spinning into a heat treatment furnace.

The precursor fibers mentioned here include fibers typified by alumina fibers (for example, shown in JP-A-59-211623), silicon carbide fibers, boron fibers, flame-resistant fibers, carbon fibers, activated fibers, etc. A general term for fibers that have just been melt-spun from formable inorganic or organic raw materials and have not yet been heat-treated.

Furthermore, the heat treatment referred to herein includes firing or preliminary heat treatment, and is a general term for performing some kind of treatment by heating the precursor fiber at least once or more.

(Prior Art) The filamentary precursor fibers immediately after spinning in the production of the above-mentioned fibers are extremely fragile. The body fibers were transferred together with this storage container to a connected heat treatment step and heat treated, and then the fibers were drawn out from the storage container while being unwound and wound up.

In this technique, in order to make the deposition and loading as uniform as possible when depositing the fibers in the storage container, an air sucker that performs a rocking motion has conventionally been used in many cases.

However, since the precursor fibers before heat treatment are very fragile, the size of the storage container must be large enough to allow them to be deposited in the storage container in an orderly manner without sustaining damage such as tangles, breakage, fluff, etc. There were restrictions, such as having to slow down the collection speed.

In addition, especially when the yarn number of the precursor am is large, it becomes necessary to increase the air pressure in the air zapping force, which causes damage such as fiber alignment disorder, yarn breakage, fluffing, etc.

FIG. 2 is a schematic diagram showing a collection method related to the present invention.

The precursor fiber 1 continuously spun from the spinning head 2 is
After being picked up by a take-up roller 3 and loaded onto a conveyor belt 5 attached to the heat treatment furnace 4 by a rotary roller 6 and a funnel 7 installed below, the conveyor belt 5 continuously transports it into the heat treatment furnace 4. It is introduced intermittently or intermittently, and is heat-treated in this furnace at a predetermined temperature with hot air having a temperature divided into several stages if necessary.

The channel 7 (located on the downstream side in the running direction of the precursor 1fiffl with respect to the rotating roller system) attracts the fiber 1 due to its suction force.
It has the role of providing a certain degree of convergence force between the single yarns, and of stacking the fibers 1 onto the conveyor belt 5.

(Problems to be Solved by the Invention) However, as described above, the precursor RMI before heat treatment is very fragile and is damaged by a slight increase in tension.
It has the disadvantage that it tends to get wrapped around the rotating roller system, especially the rotating roller 6, due to the generation of fuzz.

That is, in FIG. 2, when the alumina precursor fiber 1 is taken up by a taking-off device constituted by rotating rollers 3 and 6 and a funnel 7, the fiber 1 is pulled up by the rotating roller 6.
It got wrapped around the roller on the exit side of the machine and could not be stably collected for 10 minutes. This is rotating roller 6 and funnel 7
This occurs because the tension between the fibers is low and the force to separate the fibers from the rotating roller 6 is insufficient. Therefore, by applying a pneumatic pulling force to the funnel 7 and increasing the tension of the IM miscellaneous material sent out from the rotating roller 6,
If sufficient tension is applied to separate the ff, the tension applied to each single yarn of the fiber will vary, and since the fiber is brittle, the single yarn will break easily, and eventually the rotating roller 6
Be sure to use 1 thread as this will cause the single thread to wrap.

Eliminating the above-mentioned drawbacks is of great significance in producing high-quality target fibers efficiently and at low cost.

The purpose of the present invention is to eliminate the drawbacks of the above-mentioned prior art when taking and loading precursor fibers on a conveyor belt before heat treatment, and to achieve high quality without damage such as yarn tangles, yarn breakage, fuzz, etc. It is an object of the present invention to provide a method for collecting precursor fibers for efficiently supplying the fibers at low cost.

(Means for solving problems) The structure of the present invention that achieves the above object is as follows.

That is, it is located in a travel path of a plurality of actively rotating rollers and a precursor fiber formed via the rotating rollers, and is adjacent to the downstream side of at least one of the plurality of rotating rollers. Taking of the precursor IJiIff characterized in that the precursor fibers are made to travel and taken by an air false twisting nozzle provided and a funnel provided below the rotating roller located at the most downstream part of the plurality of rotating rollers. It's a method.

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

FIG. 1 is a schematic diagram of an example of an apparatus for carrying out the method for collecting precursor fibers according to the present invention.

The precursor fiber 1 continuously spun from the spinning head 2 is
The air is taken up by a plurality of rotating rollers 3, 6 having active rotation means and passed through an air false twisting nozzle 8, funnel 7 provided downstream of said rotating rollers 6, and into a heat treatment furnace 4 shown in FIG. The material is introduced continuously or intermittently into a heat treatment furnace 4 by an attached conveyor belt 5, and is heat treated in this furnace.

In this example, the air false-twisting nozzle used is one that has conventionally been used for false-twisting synthetic fibers for clothing. When the yarn was taken off at a take-up speed of 60 m/min, it became possible to take it off stably for about 2 hours without any fuzz or thread breakage.

Although the above embodiment has been described with reference to the case where there are two actively driven rotating rollers, the gist of the present invention is not limited to the number of rollers as long as there is a plurality of rollers.

In addition, in this example, as shown in FIG. 2, an example was shown in which the precursor fibers are introduced into the heat treatment furnace using a conveyor belt immediately after being taken off for heat treatment. It is also effective in the process.

(Effects) As explained above, the present invention is effective in taking up precursor fibers before heat treatment, especially in shaking off the fibers immediately after spinning onto a conveyor belt that is immediately introduced into the heat treatment process. This method of pulling the precursor fibers imparts cohesiveness to the fibers and makes them into a yarn form that does not cause single thread wrapping around the rotating roller, so that the wrapping of the fibers around the rotating roller is significantly reduced. It also has the effect of reducing damage to the fragile precursor fibers before heat treatment, such as yarn entanglement, yarn breakage, and fluff.

Therefore, by using this in the manufacturing process of precursor fibers, a high quality ficimen 1-like heat treatment system or
The effect is that the final product, high-quality fiber, can be manufactured efficiently and at low cost.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram that does not show an example of an apparatus for carrying out the method for collecting precursor fibers according to the present invention. FIG. 2 is a schematic diagram showing a fiber manufacturing process using the drawing method related to the present invention. Brief description of the drawings 1...Precursor fiber 2...Spinning head 3.6...Take-up roller 4... ...Heat treatment furnace 5 ... Conveyor belt 7 ... Funnel 8 ... False twisting device

Claims (1)

[Claims] A plurality of positively rotating rollers, and a plurality of actively rotating rollers, which are located in the running path of the precursor fibers formed via the rotating rollers, and are provided adjacent to the downstream side of at least one rotating roller among the plurality of rotating rollers. 1. A method for taking up precursor fibers, which comprises making the precursor fibers travel and take them off using an air false twisting nozzle and a funnel provided below a rotating roller located at the most downstream portion of the plurality of rotating rollers.