KR20010113885A - Moltren yarn take-up device - Google Patents

Abstract

The cold air induction unit surrounding the discharge yarn strands by a cooling device disposed below the spinneret; an ejector unit for injecting compressed air around the discharge yarn strands connected to the lower portion of the cooling air introduction unit; It consists of an airflow guide connected to the bottom of the building. The cooling wind introduced from the outside to the inside of the cooling wind inlet is moved in the running direction of the discharge yarn strand, and the speed of the cooling wind is increased over the air flow guide tube.

Description

Melt Spinning Attenuator {MOLTREN YARN TAKE-UP DEVICE}

In general, unstretched or semi-stretched yarns of synthetic fibers are produced by winding the discharged yarn strands spun from molten polymer from the spinneret with a cooling device, and wound by bobbins. . Moreover, the thing of the orthogonal flow type which makes an air flow flow orthogonally to a discharge yarn strand was used for the cooling apparatus which cools a discharge yarn strand below a spinneret.

It is known that in such a melt-spinning and winding device, increasing the take-up speed promotes molecular orientation in the emitting yarn strands and lowers the elongation at break. It is also known that crystallization occurs due to promotion of molecular orientation when the take-up speed of the emitting yarn strand exceeds 5000 m / min. Therefore, in the case of producing a semi-stretched yarn having a high elongation at break, there is a limit to increasing the productivity just to increase the productivity.

For example, it is preferable to use a semi-stretched yarn having a breaking elongation of 100% or more as the yarn for stretching flammability. However, in such a high-stretch semi-stretched yarn, a melt spinning and winding device equipped with a conventional orthogonal flow cooling device has a high elongation at break of 3800 m / min. Hope's semi-extension can no longer be obtained.

TECHNICAL FIELD The present invention relates to a melt spinning winding apparatus of synthetic fiber yarn strands, and more particularly, to reduce elongation or increase fineness even when speeding up the acquisition speed. The present invention relates to a melt-spinning winding device that can be made without making it.

1 is a schematic front view illustrating the melt spinning winding apparatus of the present invention.

FIG. 2 is a perspective view showing a cooling air introduction unit of the melt spinning winding apparatus of FIG. 1.

3 is a longitudinal cross-sectional view showing an ejector portion of the melt-spinning wind-up device of FIG. 1.

Fig. 4 is a longitudinal sectional view showing another embodiment of the ejector portion used in the present invention.

5 is a layout view illustrating an arrangement relationship between a spinning projection and a cooling device in the present invention.

6 is a layout view illustrating an arrangement relationship between a spinning projection and a cooling device in the present invention.

An object of the present invention is to provide a melt-spinning and winding-up device capable of producing semi-stretched yarns without reducing the elongation at break or increasing the degree of fineness even when the take-up speed is higher than conventionally.

In the melt spinning winding apparatus of the present invention which achieves the above object is a melt spinning winding apparatus which cools and winds the discharge yarn strand melt-spun from the spinneret,

A cooling device arranged at the lower part of the spinneret is connected to a cooling wind induction unit surrounding the discharge yarn strands, and is connected to the lower portion of the cooling air introduction unit to inject compressed air around the emission yarn strands. And an airflow guide tube connected to the lower part of the ejector part, and moves the cooling air introduced from the outside of the cooling air inlet part to the traveling direction of the discharge yarn strand, and moves the speed of the cooling air into the air stream. It is characterized by increasing over the guide tube.

In this way, the cooling device is composed of a cooling air inlet, an ejector part, and an airflow guide tube, and moves the cooling air in the running direction of the discharge yarn strands within the cooling device, and the speed of the cooling air is moved from the cooling air inlet to the airflow guide tube. It is possible to make the solidification point of the emitting yarn strand exist in the said airflow guide pipe | tube by making it increase over the inside, and it does not increase elongation of elongation and fine islanding, while making the acquisition speed high. Makes it possible to obtain a semi-extension.

Best Mode for Carrying Out the Invention

In the melt-spinning winding device which consists of embodiment of this invention shown in FIG. 1, 1 is a spin beam, 2 is a cooling device, 3 is a winder. The spin beam 1 is provided with a metering pump 4 in the upper center, a plurality of spin packs 6 are arranged in the lower part, and the spinneret 41 is embedded in each spin pack 6. The metering pump 4 distributes the molten polymer supplied from the spinner (not shown) to the plurality of pipes 5, supplies the quantitatively to each of the spinning packs 6, and discharges the strands Y from the spinneret 41. do.

The cooling device 2 is provided below each spin pack 6, and the oil supply guide 19 and the winder 3 are provided again. The discharge yarn strand Y radiated from the spinneret 41 is cooled in the cooling device 2 and then lubricated in the oil supply guide 19 and wound around the winder 3. The cooling apparatus 2 is comprised from the cylindrical cooling wind introduction part 7 provided in the position near the spinneret 41, and the air ejector mechanism 8 provided below it. The air ejector mechanism 8 is comprised with the ejector part 60 of the upper side, and the airflow guide tube 9 of the lower side.

As shown in FIG. 2, the cooling air induction part 7 arrange | positions the air rectification cylinder 51 inside so that the discharge yarn strand Y may be enclosed, and the several holes 52a, between the poles in the outer side between them. The inner porous pipe 52 and the outer porous pipe 53 having 53a) are arranged concentrically. The inner air rectifying cylinder 51 has a porous structure in which a wall surface is laminated so as to arrange a plurality of minute air passages in a radial direction, and the outside air discharge strands Y are formed through the walls of the porous structure. We introduce while rectifying toward.

The inner porous tube 52 covering the outside of the air rectifying cylinder 51 is fixed to the upper surface of the duct 11, the outer outer porous tube 53 of the outer side of the inner perforated tube 52 with respect to the common axis about the It is relatively to be rotated. At the lower edge of the outer porous pipe 53, a flange 10 having an arc-shaped long hole 10a is mounted. The bolt 10b fixed to the duct 11 is inserted in the long hole 10a of this flange 10, and the outer perforated pipe 53 can be fixed by fastening the bolt 10b.

When the outer perforated pipe 53 is rotated by slowing down the bolt 10b, the amount of introduction of the cooling wind is changed because the opening 53a of the outer circumferential surface changes phase with respect to the hole 52a of the inner perforated pipe 52. It can be adjusted. The holes 52a and 53a provided in the inner porous pipe 52 and the outer porous pipe 53 may have an elliptical shape, a slit shape, or any shape as well as a circle as shown in the figure.

As shown in FIG. 3, the ejector part 60 of the air ejector mechanism 8 arrange | positions the inner tube 62 inside, and arrange | positions the exterior 63 concentrically on the outer side, and this inner tube A plurality of rectifying plates 64 are interposed between the 62 and the exterior 63. The inner tube 62 is configured by a tube whose diameter is reduced at the lower end of the connecting tube 61 extending from the cooling air introduction unit 7. In addition, the plurality of rectifying plates 64 are respectively arranged in parallel with the traveling direction of the emitting yarn strand Y while the surface direction thereof is directed radially with respect to the common axis of the inner tube 62 and the outer shell 63. . The injection port 65 formed in the exit side of the rectifying plate 64 has the injection direction of the angle (theta) of 0 degrees-3 degrees with respect to the running direction of the emission yarn strand Y. As shown in FIG.

The ejector part 60 is accommodated and fixed in the common duct 11 with the ejector part 60 similarly provided in the other radiation pack 6. The duct 11 is supplied with compressed air through a supply pipe 11a from a blower (not shown), and the compressed air penetrates into the gap between the inner tube 62 and the exterior 63 of each ejector unit 60, While rectified by the rectifying plate 64, the injection port 65 is sprayed around the traveling yarn strand Y.

By injecting compressed air into the ejector unit 60, the inside of the cooling air introduction unit 7 on the upper side becomes negative pressure. In response to the occurrence of this negative pressure, the air heated in the room passes from the hole 53a of the outer porous pipe 53 to the air rectifying cylinder 51 via the hole 52a of the inner processing pipe 52. Is rectified and is supplied around the inner emitting yarn strand (Y). The air introduced inside cools the discharge yarn strand (Y) as a cooling wind, and gradually increases its speed as it flows down along the discharge yarn strand (Y) again. The cooling wind accelerates again in the ejector section 60 and flows down to the airflow guide tube 9. The discharge yarn strand Y flowing down with the cooling wind in this manner is gradually cooled to complete the solidification in the airflow guide tube 9.

The outlet end of the airflow guide tube (9) is equipped with a tube (12) that gradually spreads out. The tube 12 which spreads out gradually has an outer diameter extended toward the downstream side, and many holes are provided in the wall surface. Therefore, the cooling wind which flowed down the airflow guide pipe 9 is decelerated by expanding in the pipe 12 which this gradually spreads. That is, the pipe 12 which spreads out gradually acts as an airflow reduction part.

The duct 11 in which the ejector part 60 was installed as mentioned above is supported by the guides 13 and 14 installed in both sides by the cylinders 15 and 16, and the rollers 17 which are attached to both sides, 18) the guide rails 13 and 14 are engaged with the guide rails 13 and 14. When the cylinders 15 and 16 are stretched and operated, the duct 11 moves up and down along the guide rails 13 and 14. By lifting and lowering the duct 11 in this way, the molten spinning is brought to press the cooling air inlet 7 to the lower surface of the spin beam 2, and during the thread hanging operation or during the replacement of the spin pack The cooling air induction part 7 can be lowered, and the working space can be opened between the lower surface of the spin beam 2. As the cylinders 15 and 16, an air cylinder may be sufficient and a hydraulic cylinder may be sufficient.

The arrangement of the plurality of spinnerets 41 (radiation pack 6) provided in the spin beam 1 was one line in the embodiment of FIG. 1, but as shown in FIG. It may be arranged in two rows and may be zigzag. By such arrangement, even if more radiation packs 6 are arranged per one spin beam, the spins are maintained while maintaining the distance d between the cooling devices 2 and 2 adjacent to each other at a predetermined distance. The overall length l of the beam 1 can be shortened.

Similarly, as shown in FIG. 6, the arrangement | positioning of the some radiation protrusion 41 (radiation pack 6) provided in the spin beam 1 can also be made into circular arc shape. According to such an arc-like arrangement, it is easy to make the distance of the pipe 5 for supplying the molten polymer from the metering pump 4 to the spinneret 41 almost the same length, so that the thermal history of the polymer is uniform. It is possible to uniformize the physical properties of the yarn strands.

According to the melt spinning winding apparatus of the present invention described above, the cooling wind flows in the cooling device 2 in the same direction as the traveling direction of the emitting yarn strand Y, and the flow velocity of the cooling wind of the spinning projection 41 It is low in the vicinity, and characterized by increasing the direction toward the airflow guide (9). The adjustment of the speed of the cooling wind can be performed by controlling the air introduction amount by the outer porous pipe 53 in the cooling air introduction unit 7 and the supply amount of the compressed air in the ejector unit 60. have. The supply amount of compressed air can be performed by pressure adjustment.

Due to such a change in the cooling wind velocity, the discharge yarn strand Y and the cooling wind are accelerated by the compressed air downstream of the ejector unit 60, and the discharge yarn strand Y is cooled to cool the airflow guide tube 9 Reaches a freezing point. In the airflow guide tube 9, the air drag is reduced because the discharge yarn strand Y is subjected to the cold wind flowing in the same direction, so that the stress applied to the discharge yarn strand Y is reduced, and the molecular orientation is reduced. Will be suppressed. Therefore, it is possible to maintain the breaking elongation in a large state while speeding up the take-up speed.

In order to obtain such an inhibitory effect on molecular orientation, the total length of the airflow guide tube 9 is preferably 10 to 50 times the inner diameter. If the total length of the airflow guide tube 9 is less than 10 times, since the solidification point is always stable and it is difficult to remain in the airflow guide tube 9, variation in the elongation of the thread strands easily occurs. If the total length of the airflow guide tube 9 is larger than 50 times the inner diameter, the pressure loss in the airflow guide tube 9 increases, so that negative pressure generation on the upstream side is insufficient, thereby cooling the discharge yarn strand. Incompleteness is the cause of fine islands.

In the adjustment of the cooling wind speed as described above, when the speed of the cooling wind near the spinneret 41 is increased, turbulence is generated, and the discharge yarn strand Y during the cooling causes the vibration to vibrate. Because it causes fine islands. As a cooling wind speed which does not produce such a leading board, when the fineness of a thread strand is 3.7 dtx, it is set to 15-35 m / min downstream of the cooling wind introduction part 7, and it is 1 / 1.2-of the said speed near the spinneret 41. It is preferable to set it as 1/2. The cooling wind speed is made small for the spinning of small thread strands, and the cooling wind speed is made larger for the spinning of thread strands with large fineness. Moreover, it is preferable to lengthen the length of the cooling wind introduction part 7 so that the yarn strand with a large fineness is long.

In addition, if the pressure of the compressed air in the ejector unit 60 is too high, turbulence is generated, thereby causing thread shaking, which causes fine islanding and thread cutting. Therefore, the injection speed in the ejector section 60 may be 3000 m / min or less.

As described above, the injection direction of the compressed air injected from the injection port 65 of the ejector unit 60 is set to an angle θ of 0 ° to 3 ° with respect to the traveling direction of the discharge yarn strand (Y). Preferably, 0 degrees are especially preferable. That is, as shown in FIG. 4, when the angle θ is 0 °, since the injection direction of the injection hole 65 and the axial direction of the inner tube 62 are parallel, the compressed air injected from the injection hole 65 The airflow moves along the boundary layer 101 without being mixed with the airflow flowing out from the inner tube 62. Moreover, since the speed V2 of the compressed air from the injection port 65 is faster than the speed V1 of the air flow from the inner tube 62, the compressed air is at a lower pressure. Therefore, since the discharge yarn strand Y is curvedly displaced toward the boundary layer 101, the distance between the constituent fillers is increased, so that cooling is promoted. The boundary layer 101 diffuses and disappears as it goes downstream.

The gradually spreading end portion 12 connected to the lower end of the airflow guide tube 9 expands the cooling wind descending together with the discharge yarn strand Y, and reduces the amount of oil reaching the oil supply guide 19. The shaking of the thread in the guide 19 is reduced, and the attachment panel of an oil agent is reduced.

Example 1

1 to 3, the inclination angle θ with respect to the discharge yarn strand Y of the compressed air injected from the injection port 65 is set at 1.5 °, the temperature of the compressed air is 40 ° C, and the pressure is 400 mmaq. And set the cooling wind speed to be 20 m / min at the upper end of the cooling air introduction section 7, 30 m / min at the lower end, and 2300 m / min in the airflow guide tube 9, thereby forming the polyester multifilament yarn strand 133dtx- 36 f was melt-spun and acquired at 4000 m / min.

The elongation at break of the obtained polyester semi-drawn yarn was 120%, and the lead panel (U%) was 8%.

Comparative Example 1

The cooling wind speed was set to 18 m / min using the fusion spinneret equipped with the orthogonal-flow type cooling device, the polyester multifilament yarn strand 133dtx-36f was melt-spun, and acquired at 4000 m / min.

The elongation at break of the obtained polyester semi-stretched yarn was 90%, the leading edge (U%) was 0.9%, and the elongation at break was lowered.

Example 2

In the melt spinning winding apparatus as in Example 1, the cooling wind speed is adjusted to be 22 m / min at the upper end of the cooling air inlet 7, 32 m / min at the lower end, and 2200 m / min in the airflow guide tube 9. The polyester multifilament yarn strand 280dtx-48f was melt-spun and acquired at 4000 m / min.

The elongation at break of the obtained polyester semi-drawn yarn was 121%, and the lead plate (U%) was 0.9%.

Example 3

The polyester multifilament yarn strand 133dtx-36f was manufactured on the same conditions as Example 1 except having set the angle (theta) of the injection hole 65 to 0 degree.

The elongation at break of the obtained polyester semi-stretched yarn was 118%, and the lead panel (U%) was 1.0%.

Example 4

The polyester multifilament yarn strand 133dtx-36f was manufactured on the same conditions as Example 1 except having acquired at 4500 m / min.

The elongation at break of the obtained polyester semi-drawn yarn was 102%, and the lead panel (U%) was 0.7%.

Example 5

The polyester multifilament yarn strand 133dtx-36f was manufactured on the same conditions as Example 1 except having set the angle (theta) of the injection hole 65 to 3 degrees.

The elongation at break of the obtained polyester semi-drawn yarn was 124%, and the lead panel (U%) was 1.1%.

As described above, according to the melt spinning and winding device of the present invention, the cooling device is constituted as the cooling air introduction part, the ejector part and the airflow guide tube in this way, and the cooling air is moved in the running direction of the discharge yarn strand in the cooling device. By further increasing the speed of the cooling wind from the cooling air inlet to the airflow guide tube, it is possible to allow the solidification point of the discharge yarn strands to be present in the airflow guide tube, thereby increasing the speed of the acquisition. It is possible to obtain a semi-extended yarn without deterioration of or increase of the island degree.

The present invention can be used in the field of manufacturing synthetic fibers, particularly in the case of producing high-strength semi-stretched yarn at a high speed of acceptance.

Claims (10)

In the melt spinning winding device for cooling the wound yarn strand melt-spun from the spinneret, A cooling air inlet unit surrounding the discharge yarn strands with a cooling device disposed below the spinneret; an ejector unit connected to the lower part of the cooling air inlet unit for injecting compressed air around the discharge yarn strands; And an airflow guide tube connected to the lower part of the ejector portion, and moves the cooling wind introduced from the outside to the inside of the cooling wind introduction portion in the traveling direction of the discharge yarn strand, and transmits the speed of the cooling wind over the airflow guide tube. Melt spinning winding device to increase. The method of claim 1, Melt spinning and winding device for presenting the freezing point of the discharge yarn strand in the air flow guide tube. The method according to claim 1 or 2, A melt-spinning damping device comprising an air rectifying tube surrounding the discharge yarn strand in the cooling air induction portion. The method according to claim 1 or 2, A melt-spinning and winding-up device in which the ejection direction of compressed air in the ejector portion is set in a range of 0 ° to 3 ° with respect to the running direction of the discharge yarn strand. The method of claim 4, wherein A melt-spinning winding device comprising a rectifying plate disposed in the ejector unit. The method of claim 4, wherein A melt-spinning and winding-up device in which the ejection speed of compressed air in the ejector portion is set to 3000 m / min or less. The method according to claim 1 or 2, Melt spinning and winding device equipped with a tube that is gradually spreading the end portion in the outlet portion of the air flow guide tube. The method according to claim 1 or 2, A melt-spinning wind-up device in which the length of the air flow guide tube is 10 to 50 times the inner diameter. The method according to claim 1 or 2, A melt spinning winding device, wherein the spinnerets are arranged in a plurality of rows, and the cooling device is arranged in each spinneret. The method of claim 9, A melt-spinning and winding-up device in which two or more rows are arranged before and after the rows of the plurality of spinnerets are arranged.