JPS5838522B2 - Youyuboushipatsuku - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spinning pack for melt-spinning a thermoplastic polymer, and an object thereof is to improve the cooling effect of the yarn and improve the spinning condition.

Generally, as shown in FIG. 1, a melt spinning apparatus mainly includes a pack 3 incorporating a spinning cap 2 having an annular spinning nozzle in a spin block 1, and a spinning tube 5 having a cooling air outlet 4 at the bottom thereof. However, in such a device, the cooling air emitted from the blowout D4 of the spinning tube 5 is directly below the pack 3, and the annular yarn 6 spun from the cap 2 is
Since the yarn remains in a relatively high temperature state and is disturbed in the interior of the yarn, that is, near the reference numeral 7 in Figure 1, it has an adverse effect on the cooling of the yarn and causes the yarn to stick together and the section to be disordered. ing.

However, since the pack 3 is kept warm by the spin flock 1, it is difficult to improve the cooling effect by bringing the spinning tube 5 closer to the pack 3 to speed up the cooling of the yarn.

Therefore, in order to improve the cooling effect of the yarn, as shown in FIG. However, with such a method, it is very difficult to place the blower cap 8 in the circular yarn bundle 6 which has a small area and blow a large amount of cooling air, and the blower pipe 9 and the yarn intersect, causing the yarn to This has disadvantages in that it may damage the fibers, and it is not easy to assemble and prepare the spinning device.

The present invention was devised in view of this problem, and is a melt spinning apparatus that is equipped with a spinning pack in the upper part for forming polymer threads, and a device in the lower part for cooling and solidifying the threads from the surroundings. This is characterized in that through-holes for discharging cooling air are provided on the pack surface corresponding to the inside of the yarn bundle.

An embodiment of the present invention will be described below with reference to FIG.

In FIG. 3, reference numeral 11 denotes a through hole provided in the center of the pack 10, which is made of a tube body 13 whose inside is covered with a heat insulating material 12 such as asbestos, and whose lower end is a bridge plate 1.
4, and the upper end communicates with an exhaust hole (not shown) provided in the spin block 1 through the polymer introduction hole 17 (of course, it may directly protrude outside the spin block, Also, depending on the situation, it may be placed on the side of the pack 10).

A cap holder 15 has a hole 16 corresponding to the through hole 11 in the center thereof.

Other symbols are the same as in FIG.

Therefore, in such a device, the yarn bundle 6 extruded from the spinning cap 2 is cooled by the cooling air discharged from the blowing hole 4 of the spinning tube 5, but some of the cooling air that has entered the inside of the yarn bundle 6 is Since the fibers are discharged to the outside through the through holes 11, there is no formation of cooling air that would stay in the annular yarn bundle 6 immediately below the pack 10 and become hot, as described above.

Note that the cooling air is discharged from the through holes 11 by natural or forced exhaust, but it is preferable to maintain or adjust the amount of exhausted air by providing a known means such as a flow meter, a regulating valve, or a pump. .

As explained above, in the present invention, a through hole for discharging cooling air is provided on the pack surface corresponding to the inside of the spun yarn bundle directly under the pack. A portion of the wind is discharged through the through holes, and the cooling air stays inside the yarn bundle directly under the pack, raising the temperature and not being disturbed. This ensures uniform and effective cooling inside and outside the yarn bundle. It is possible to move the solidification point of the yarn to the upper part of the spinning tube, that is, to raise the fixation point, and the yarn can be brought into close contact with each other, and the section ratio is also improved, which further improves the This improves the spinning condition and has a very large effect.

[Brief explanation of the drawing]

1 and 2 are schematic sectional views showing conventional embodiments,
FIG. 3 is a schematic sectional view showing an embodiment of the present invention. 10 is a pack, 11 is a through hole, 12 is a heat insulating material, 13 is a tube body, 14 is a bridge plate, and 15 is a cap holder.

Claims (1)

[Claims] 1 In a melt-spinning device that is equipped with a spinning pack at the top that forms a polymer into yarn and a device at the bottom that cools and solidifies the yarn from the surroundings, the cooling is applied to the pack surface corresponding to the inside of the spun yarn bundle directly under the pack. A melt-spinning pack characterized by having through holes for discharging wind.