KR930005091B1 - Cooling device for synthetic fiber - Google Patents

Abstract

The cooling apparatus of the fiber is characterized by setting up: spinning block (1), from which melts are extruded through holes of spinneret (2) to form filaments (6); quench chamber (3) in which 1 to 6 dounward inclined separation plates (7) are set up, and at which quench filter screen (4) through which quench air is fed to cool and solidify the filaments is attached. Dampers (5) of controlling air-blowing amount which control the speed of quench air that is blown through quench filter screen (4) are set up just below the separation plates (7), respectively.

Description

Cooling device of synthetic fiber

1 is a schematic view of a conventional synthetic fiber cooling apparatus.

2 is a conventional quench air velocity distribution diagram.

3 is a schematic view of a synthetic fiber cooling apparatus of the present invention.

4 is a quench air velocity profile of the present invention.

* Explanation of symbols for main parts of the drawings

1: Radiation Block 2: Detention

3: quench chamber 4: quench filter screen

5: Air volume control damper (Damper) 6: Filament

7: separator

The present invention relates to a cooling device for synthetic fibers, and more particularly, to fabricating a filament in a molten state derived from a spinneret installed in a spinning block during manufacturing synthetic fibers to have a uniform cross section. The present invention aims to provide a device for cooling and solidifying synthetic fibers by using a cooling device that is improved from a quench chamber that maintains a uniform air velocity.

In general, in the production of synthetic fibers, the cooling process is a process of cooling and solidifying by supplying a certain amount of quench air to the molten yarn extruded into a fiber through the detention, the molten yarn extruded into the fiber is cooled by quench air The point of solidification of the melt is called plastic point, which is an important factor in determining the spinning condition. If the air temperature and air volume are not constant, the quench air is a direct cause of uneven physical properties between the filaments. As it plays a role of uniformly cooling and solidifying the filament, it greatly affects the occurrence of disturbance of the filament.

Therefore, in order to reduce the variation of the plastic point, the quench chamber is designed with sufficient consideration to give uniform properties to each filament by supplying quench air of constant temperature and wind velocity to each filament from the spinneret hole If the number of filaments is large, it is easy to generate a cooling plate at the periphery and the center, so the wind speed distribution of the quench air should also be fully considered. When slow cooling, crystallinity increases, which requires a large drawing force in the drawing process and causes cutting of the moor, so it is necessary to easily cool by drawing.

Such a cooling device conventionally has a damper that can control the air volume of the air per quench chamber as shown in FIG. 1 so that the velocity of air coming out through the quench filter screen installed at the front of the quench chamber is the same as that of FIG. Due to the large variation in the distribution, the cooling effect between the mono-mono filaments in the molten state discharged from the mold becomes uneven, resulting in poor cross-sectional uniformity (U%) of the filaments formed by combining the monofilaments.

Therefore, in order to solve the problems of the prior art, the present invention installs a separator plate in multiple stages inside the quench chamber, but installs a wind volume control damper directly under the quench chamber. The purpose is to make the cooling effect between the monofilaments in the molten state discharged from the mold uniform by allowing the distribution to be uniformly controlled.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The filament 6 produced by the melt of the spinning block 1 is extruded through the detention hole of the detention 2 is cooled and solidified as a quench air supplied by the quench filter screen 4 of the quench chamber 3. In the fiber cooling apparatus, a plurality of down-sloped separating plates 7 are provided inside the quench chamber 3 provided with the quench filter screen 4, and the quench filter screen 4 is directly below. It is made by installing each of the air volume control damper (5) to control the wind speed of the quench air coming through.

In the figure, reference numeral 8 denotes the height of the quench chamber.

According to the present invention configured as described above, a plurality of separators 7 inclined downwardly are installed inside the quench chamber 3, and the air volume and the air temperature of the quench air coming out through the quench filter screen 4 for each of the separators. By making it uniformly regulated by (5), the cooling effect between the filaments in the molten state discharged from the mold 2 becomes uniform, and the uniformity (U%) is not only good, but also the factor of disturbance occurrence is suppressed. The physical properties between the filaments are uniform, thereby improving the quality of the product.

Example 1

The thermoplastic polyester resin having an intrinsic viscosity of 0.65 has a capillary diameter of about 0.27 mm and a capillary with 36 capacities. The spinning temperature is 290 ° C. and the spinning speed is 1,300 m / min, and the height of the quench chamber is 0.72 m. Using a quench chamber with a wind speed of 0.5m / sec for quench air, 0.36m for a section separated by one separation plate, and two air volume control dampers, a yarn having a fineness of 75 deniers was manufactured. The results of the measurement of the uniformity of the yarn and the wind speed during its manufacture are shown in Table 1.

EXAMPLES 2-5, COMPARATIVE EXAMPLE 1

In the same manner as in Example 1, the number of separation plates, the distance between the separated parts and the number of air volume control dampers are shown in Table 2.

TABLE 1

TABLE 2

From the results of Tables 1 and 2, the number of separators is more than 5 and the smaller the distance between the separated parts, the better U%, but the effect is not excellent as the number of separators is increased. In terms of economics, the number of separators is preferably 1-6.

Claims (1)

The filament 6 produced by the melt of the spinning block 1 is extruded through the detention hole of the detention 2 is cooled and solidified as a quench air supplied by the quench filter screen 4 of the quench chamber 3. In the fiber cooling apparatus, one to six separator plates (7) which are inclined downward are installed in the inside of the quench chamber (3) provided with the quench filter screen (4), and the quench filter screen (4) directly underneath. Cooling device for the fiber, characterized in that by installing each of the air volume control damper (5) for controlling the wind speed of the quench air coming through.