JPH10292217A - Melt spinning unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a melt spinning unit capable of restraining filament yarns in spinning from running out of line and of uniformly coating them with lubricant, thus steadily carrying out a melt spinning. SOLUTION: This unit comprises a spinning pack, chimney cooling unit, oiling device, godet roller and winder, wherein the chimney cooling unit is disposed between the spinning pack and godet roller so as to connect the lower part of the spinning pack with the oiling device for allowing the filament yarns to travel therebetween and converge at the latter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a melt spinning apparatus for suppressing the disorder of yarns and uniformly depositing an oil agent when melt spinning a thermoplastic polymer.

[0002]

2. Description of the Related Art Conventionally, in a melt spinning apparatus, a chimney cooling apparatus is generally provided below a spin pack for the purpose of cooling a yarn. After that, it was common to install a refueling device for the purpose of improving the passage property. When spinning is performed using such a melt spinning device, yarn sway occurs due to accompanying air flow generated by running of the yarn or air flow change due to disturbance, and inevitably yarn sway also occurs at the yarn joining portion of the refueling nozzle portion. This causes a problem of leakage and scattering of the oil agent.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a melt spinning apparatus capable of suppressing the disorder of the yarn during the melt spinning, making the adhesion of the oil agent uniform, and stably spinning. It is in.

[0004]

The present invention has the following construction to solve the above-mentioned problems.

That is, a melt spinning device including a spinning pack, a chimney cooling device, an oil supply device, a god roller and a winding device. A chimney cooling device is provided between the spin pack and the goderol, and the yarn is supplied from the lower portion of the spin pack by the oil supply device. A melt spinning apparatus characterized in that a chimney cooling device is continuously provided until the convergence.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The melt spinning apparatus of the present invention will be described below.

The melt spinning apparatus of the present invention is a spinning pack having a die having pores for melting a thermoplastic polymer and forming a yarn, and a rectified stream for cooling the formed yarn. Chimney cooling device that blows air, oil supply device for adhering oil to the yarn to improve the passability of the yarn, godet roller that regulates at a speed to determine the characteristics of the yarn, winding to wind the yarn It consists of a collecting device.

The present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram schematically showing an example of the melt spinning apparatus of the present invention. The melted polymer enters the pack through the polymer inlet tube 7 and passes through the spinneret to become a thread. After the discharged yarn 2 is cooled by the cooling air blown out from the continuous chimney cooling device of 3, 8 and the oil agent is applied by the refueling nozzle 4 while reducing the influence of the accompanying airflow and disturbance, the godet roller 5 At a predetermined take-up speed, and are taken up by the take-up device 6.

The melt spinning apparatus of the present invention can be used for thermoplastic polymers such as polyethylene terephthalate and polyamide.

The spin pack is composed of a polymer filtration unit and a spinneret.

In general, during the melt spinning, the yarn discharged from the spin pack generates an accompanying airflow due to the air resistance of the running yarn, and the yarn is likely to sway. Further, an oil agent is attached in order to reduce the frictional resistance of the yarn and improve the passability through the stroke.

[0013] In addition, yarn sway also occurs in an oil supply guide, an oil supply roller, or the like of an oil supply device that causes the oil to adhere to the yarn, and the yarn path deviates from a regular portion, thereby impairing uniform adhesion of the oil. Therefore, the non-uniform adhesion of the oil agent to the yarn causes oil agent leakage and oil agent scattering, thereby fouling the guide and god roller of the yarn path and adversely affecting operability.

In the melt spinning apparatus of the present invention, a chimney cooling device is provided between the spinning pack and the goderol to prevent the yarn from swaying. The cooling device is provided continuously.

According to the present invention, at the time when the discharged molten yarn starts to solidify, the yarn speed increases, and due to air resistance,
The accompanying airflow occurs, and the yarn sways due to the interference of the airflow, but the effect of the accompanying airflow is reduced by the rectified wind, that is,
Yarn sway in the refueling device can be eliminated.

[0016] The wind speed in the refueling unit is 10 to 60 m.
/ Min is preferred.

In the present invention, the direction of the rectified wind is preferably substantially perpendicular to the running direction of the yarn.

In the present invention, the phrase "the chimney cooling device is provided continuously" means a state in which there is no portion where the influence of the accompanying airflow is large. Therefore, the chimney cooling device may be integrated. However, the split type is preferable in order to change the air volume from the viewpoint of economy and the like.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments.

Example 1, Comparative Example 1 Using the melt-spinning apparatus shown in FIG. 1, polyethylene terephthalate having an intrinsic viscosity of 0.6 was melted at 290 ° C. to form two groups of 36 holes. The film was taken up by the take-up device 6 at 3000 m / min, while cooling by a cooling air blown from a spinneret 1 having a spinning hole of 72 holes and reducing the influence of accompanying airflow and disturbance. The length of the chimney cooling device was 50 cm from the lower end of the refueling nozzle 4.

As a result, there was almost no yarn sway on the yarn contact surface of the oil supply nozzle, and there was no scattering of the oil agent.

On the other hand, for comparison, polyethylene terephthalate having an intrinsic viscosity of 0.6 was melted at 290 ° C. using the melt spinning apparatus shown in FIG. 2 to form 72 groups of 72 holes each having 36 holes. The film was wound up from the spinneret 1 having holes by the winding device 6 at 3000 m / min. As a result, a large amount of oil was scattered from the oil supply nozzle, and the yarn was frequently broken.

[0023]

The melt-spinning apparatus of the present invention has a great effect on measures to increase the accompanying airflow, and reduces the number of yarn breaks, thereby stabilizing the operation.

[Brief description of the drawings]

FIG. 1 is a schematic view schematically showing an example of a melt spinning apparatus of the present invention.

FIG. 2 is a schematic view schematically showing an example of a conventional melt spinning apparatus.

[Explanation of symbols]

 1: Spinning pack 2: Yarn 3: Chimney cooling device 4: Oil supply device 5: Goderol 6: Winding device 7: Polymer introduction tube 8: Chimney cooling device

Claims (1)

[Claims] 1. A melt spinning device comprising a spinning pack, a chimney cooling device, an oil supply device, a god roller and a winding device, wherein a chimney cooling device is provided between the spin pack and the god roll, and the yarn is supplied from the lower portion of the spin pack by an oil supply device. A melt spinning device, wherein a chimney cooling device is continuously provided until the convergence is achieved.