JPH0726367Y2 - Core liquid treatment equipment for spinnerets for hollow fibers - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinneret for hollow fibers, and more particularly to an apparatus for treating a core liquid supplied to a spinneret having a multi-tubular structure.

[0002]

2. Description of the Related Art When manufacturing hollow fibers, a spinneret having a multi-tube structure is used, and a core liquid is introduced into a central tube of the spinneret, and a spinning solution is introduced into a coaxial annular portion surrounding the central tube. Are well known in the art. FIG. 2 shows a conventional spinneret for hollow fibers of this type.

As can be seen from FIG. 2, when the hollow fiber is manufactured, the spinning dope 18 is appropriately introduced from the spinning dope introducing pipe 19 via the metering pump 17 and the core liquid 12 is introduced via the metering pump 15 and the like. And is introduced from the core liquid introducing pipe 16.
In this case, it is contained in the core liquid 12 or the band heater 3
When the spinneret 20 is heated by 0 or the like, air bubbles 14 generated in the core liquid 12 (which are frequently generated when the core liquid that is easily vaporized) are generated, the core liquid introducing pipe 16 and the central pipe 21 of the spinneret 21.
Accumulates in and hinders and destabilizes the supply of core fluid.
As a result, the hollow fibers obtained by this type of conventional spinneret 20 often cause dimensional changes over time (tapering), and in extreme cases even thread breakage can occur.

[0004]

DISCLOSURE OF THE INVENTION The present invention aims to eliminate the drawbacks associated with the above-described conventional spinneret for producing hollow fibers, that is, to facilitate the formation of bubbles contained or generated in the core liquid. It is to provide a means for separating.

[0005]

According to the present invention, in the hollow spinneret having a multi-tubular structure, the problem with the above-mentioned conventional technique is that the core liquid is quantified in the central tube of the spinneret by a pumping action. A core liquid introducing pipe for supplying the liquid is provided, a tip of the core liquid introducing pipe is branched into two directions, a first opening / closing valve is connected to one of the branched ones, and the core is inserted through the first opening / closing valve. A gas separation device for removing air bubbles in the core liquid is connected to the liquid introduction pipe, and the gas separation device includes a core liquid container and a breaker for releasing air to the upper part of the container. 3, an on-off valve is further provided, and a second on-off valve is provided on the other branched side of the core liquid introducing pipe, and the core liquid introducing pipe and the spinneret are connected via the second on-off valve. It will be solved.

When hollow fibers are continuously spun for a long period of time, two or more gas separation devices connected to a core liquid introducing pipe are arranged in parallel, and these are alternately used to spin the fibers endlessly. This is convenient because it is possible.

[0007]

According to the present invention, the tip of the core liquid introducing pipe is branched into two directions, and the air bubbles in the core liquid are removed from the core liquid introducing pipe through the first opening / closing valve on one of the branched ones. Since the gas separation device for the above is connected and arranged, the bubbles contained in the core liquid or generated in the core liquid are transferred to the gas separation device and easily removed.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be further described below with reference to the accompanying FIG.

In FIG. 1, the same components as those in FIG. 2 are designated by the same reference numerals and have the same functions, and the reference numeral 28 is a sealing O-ring.

The present invention shown in FIG. 1 is different from the prior art shown in FIG. 2 in that the tip of a core liquid introducing pipe 16 is branched, and a gas separating device 10 is provided at one of the branched ends. This gas separation device 10 includes a core liquid container 11 for storing the core liquid 12, a first opening / closing valve 24 provided at a connecting portion between the container and the core liquid introducing pipe 16, and the container. And a third opening / closing valve 22 for a breaker for releasing the upper portion to the atmosphere. Reference numeral 26 is a second opening / closing valve for supplying / shutting off the core liquid to / from the spinneret. Of course, these on-off valves 22, 24, 26 may be either manual valves or controllable solenoid valves.

Although not shown, the gas separation device 1 having the above structure
Two or more 0's can be provided in parallel,
In that case, for example, the valve 24 may be a manifold valve, or a manifold and a series of valves commonly used in piping technology.

The operation of the device according to the present invention will be described below with reference to FIG.

First, the valve 26 is closed and the valve 2 is closed.
Open 2 and 24. In this state, the container 11 of the gas separation device 10 is filled with the core liquid through the core liquid introducing pipe 16 by the metering pump 15 such as a gear pump. The filling amount of the core liquid may vary depending on the duration of the spinning operation.

Then, the supply of the core liquid is stopped and the valve 2
2 is closed and valve 26 is opened. Thus, the core liquid 1 in the container
No. 2 flows down into the spinneret 20, and the air layer in the upper part of the container acts as a negative pressure to suppress the flow down of the core liquid 12, and when the balance is achieved, the flow down of the core liquid 12 is automatically stopped. To do.

After reaching this state, the band heater 30 is turned on and the metering pumps 17, 1 such as gear pumps are turned on.
5, the spinning stock solution 18 and the core solution 12 are supplied from the respective introducing pipes 19 and 16 to start the hollow fiber spinning. Bubbles 1 contained in the core liquid during such work
4, or the base 2 by heating with the band heater 30
The air bubbles 14 generated in the core liquid within 0 are the gas separation device 10
And is easily separated from the core liquid. Moreover, the negative pressure generated by the air layer portion in the upper part of the container is weakened by the absorption of the air bubble by the arrival of the air bubble portion 14 in the upper part of the core liquid container 11, and as a result, An amount of core liquid 12 commensurate with the volume of bubbles is replenished by flowing down from the gas separation device 10.

[0016]

As can be seen from the above description, according to the present invention, it is possible to easily and effectively separate air bubbles from the core liquid with a simple structure, and the resulting dimensional change of the hollow fiber can be prevented. Moreover, the risk of locally defective yarn (blister yarn, etc.) or yarn breakage due to air bubbles being discharged from the core liquid side during spinning is prevented, and high quality hollow fiber is stably spun. It becomes possible.

Furthermore, by using two or more gas separation devices in parallel, it becomes possible to continuously and stably spin high-quality hollow fibers for a long period of time.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a core liquid treating apparatus including a spinneret for hollow fibers and a gas separating apparatus thereof according to the present invention.

FIG. 2 is a schematic sectional view of a conventional spinneret of this type.

[Explanation of symbols]

 10 Gas Separation Device 11 Core Liquid Container 12 Core Liquid 14 Bubbles 15 Core Liquid Supply Metering Pump 16 Core Liquid Introducing Tube 17 Spinning Liquid Solution Supplying Constant Pump 18 Spinning Liquid Solution 19 Spinning Liquid Solution Introducing Tube 20 Spinneret 21 Central Tube of Spinneret 22 3rd opening / closing valve 24 1st opening / closing valve 26 2nd opening / closing valve 28 O-ring 30 band heater

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Yukio Kasuga Inventor, Yukio Kasuga 3-43-2, Ebisu, Shibuya-ku, Tokyo (56) References Japanese Patent Publication No. 51-45707 (JP, B2) US Patent 4340481 (US, A)

Claims (2)

[Scope of utility model registration request] 1. A hollow fiber spinneret having a multi-tubular structure, wherein a core liquid introducing pipe (16) for quantitatively supplying the core liquid into a central pipe (21) of the spinneret (20) by a pump (15) action. ) Is provided, the tip of the core liquid introducing pipe (16) is branched in two directions, and the first on-off valve (24) is connected to the branched one, and the first on-off valve (24) is provided. A gas separating device (10) for removing bubbles in the core liquid is connected to the core liquid introducing pipe (16), and the gas separating device (10) includes a core liquid container (11) and A third opening / closing valve (22) for a breaker for releasing the atmosphere is provided on the upper part of the container, and a second opening / closing valve (26) is provided on the other branched side of the core liquid introducing pipe (16). The core liquid introducing pipe (16) and the spinneret (20) are connected via a second on-off valve (26). A core liquid processing device for a spinneret for hollow fibers, characterized in that 2. The utility model registration claim characterized in that the gas separation device (10) connected to the core liquid introducing pipe (16) is formed by arranging two or more gas separation devices in parallel. The core liquid treatment apparatus according to item 1.