JP2006348457A - Cooling air-regulating device in cooling device for spinning - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling air-regulating device in a cooling device for spinning, applicable to high-temperature spinning, facilitating the reuse by cleaning, and heightening spinning performance by directing the attention to the cooling air-regulating device in the cooling device for the spinning. <P>SOLUTION: The cooling air-regulating device in the cooling device for the spinning, for carrying out the cooling in the melt spinning in a process for the spinning by extruding a molten synthetic fiber resin from fine holes is obtained by forming a cylindrical body by turning and laminating a belt-shaped metal tape having nearly uniform unevenness in the longitudinal direction at a prescribed angle, fixing the laminated and contacting belt-shaped metal so as to have a tilted radial pore group passing the inner and outer wall faces of the cylindrical body. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is a cooling air rectifier for cooling a high-temperature yarn (melt spinning) when the molten resin is discharged in the form of a yarn in the process of producing a spun from a molten synthetic fiber resin, and is applicable to high-temperature spinning. The present invention relates to a cooling air rectifier for a spinning device, which is easy to wash and regenerate and has the purpose of improving spinning performance.

  The molten synthetic fiber resin (for example, polymer) is sent to a spin pack, and is discharged from a nozzle (discharge port <pore>) at the tip of each plate tube of the spin pack to form a melt spinning beam. The spinning beam is also called a spinning beam or a filament. Further, the melt spinning beam is rapidly cooled and solidified by the cooling air blown from the spinning cooling device, and becomes a yarn (cooled spinning). Usually, a plurality of tips (nozzles) of the plate tube are arranged in a circular shape on a spinneret (cap). For this reason, the melt spinning beam discharged from the nozzle forms a plurality of yarns (yarn shapes) and is sent to the spinning cooling device. Usually, gravity is used for sending from top to bottom. In the following, the discharge port for melt spinning is not referred to as a “nozzle” but may be expressed as “spinner” or “spinner”, but the contents are the same.

  If the rectifying action of the cooling air is not sufficient in the spinning cooling device, or if turbulent flow occurs in the cooling air due to the heat of the melt spinning beam, etc., it may cause fluffing, cutting, and partial uneven cooling of the spinning during drawing. Become. Inhomogeneous cooling also causes a decrease in yarn quality such as denier spots. For this reason, the cooling method occupies an important position in the spinning production process. Therefore, various patent projects and practical projects have been proposed for this cooling method.

  In “Linked yarn path duct in melt spinning” (Patent Document 1), the thread path duct is improved, and the vibration in the transverse direction (perpendicular to the spinning direction) is completely lowered in the yarn path duct (in the discharge direction of the spinning). Make no rectification and realize the prevention of denier spots. It is recommended to use a cylindrical porous shield as a cooling air rectifier that blows cooling air to the melt spinning beam.

  In “Polyester Fiber Manufacturing Method and Sealed Vertical Spinning Cylinder” (Patent Document 2), the relational expression between the inner diameter of the spinning cylinder just below the blowing part, the inner diameter of the reduced part, and the pitch circle diameter of the outermost peripheral hole of the die is Guidance and proposed the optimal solution (inequalities) in the production of spinning yarns to become polyester fibers for industrial materials. As for the cooling air rectifier, “It has a rectifying effect such as a perforated plate and a sintered filter, and preferably has a length of 30 to 50 cm”, but no further details are described.

  In the “spinning apparatus” (Patent Document 3), in order to prevent yarn breakage and obtain good spinning with small fineness unevenness, the discharge holes of the spinneret are arranged in an annular shape on at least one arrangement diameter, and the diameter of the arrangement diameter Is proposed to be at least 3/5 times the inner diameter of the cylindrical cooling air rectifier. It is also proposed that the cooling air flow has a velocity gradient such that the flow velocity increases from the upstream side to the downstream side of the cylindrical cooling air rectifier. In order to obtain this speed gradient, the buffer is provided with an inclined portion, and the inclination is adjusted so that the speed increases as going downstream. On the other hand, the cylindrical cooling air rectifier is formed in a cylindrical shape with a member having a rectifying action such as a honeycomb, and the honeycomb pores are directed radially from the center of the cylindrical cooling air rectifier, so that the cylindrical cooling air rectifier is It is preferable that the cooling air flow is uniformly blown from the inner peripheral surface of the cylindrical cooling air rectifier with respect to the single yarn passing through the apparatus. In addition, examples of the material include sintered metal, a net-like member, a non-woven member, and the like, and these materials are formed into a cylindrical shape.

In the “melt spinning apparatus” (Patent Document 4), a stable cooling airflow is realized by using a seal. The cooling air rectifier is not described in detail only by using a porous body.
Japanese Utility Model Publication No. 47-6734 Japanese Patent No. 2888888 JP 2002-309431 A JP-A-2005-42227

  All of the documents that have been seen in the background art suggest that the cooling air rectifier of the spinning cooling device (name varies depending on the document) is cylindrical and porous. This is because it is a basic form for producing uniform and rectified cooling air. However, there is no detailed description about the manufacturing method of the cooling air rectifier itself.

  The cooling air is described in detail in Patent Document 1 except that it is rectifying downward (in the conveying direction of the spinning beam) at the yarn path duct (portion located below the cooling air rectifier). There is no.

  Patent Document 3 describes a device for increasing the flow velocity of the cooling air in the cooling air rectifying device as it goes down, but this is not realized by the structure of the cooling air rectifying device. It is realized by the structure. Moreover, the wind direction is a cross wind (wind perpendicular to spinning) as shown in the figure.

  Although the cooling air rectifier is mentioned, there is no detail because all the projects are for the improvement of the whole cooling device, and the cooling air rectifier itself is not emphasized. The reason why the wind speed gradient is increased downward in Patent Document 3 is that melt spinning cools rapidly, but the melting degree is high immediately after discharge, and the fineness due to yarn breakage due to strong wind or temperature drop of the die is reduced. This is to prevent the increase. In any case, this wind speed gradient is realized by the external structure of the cooling wind rectifier.

  In view of the above points, the problem to be solved by the present invention is to focus on the cooling air rectifier of the spinning cooling device, and can be applied to high-temperature spinning, is easy to wash and regenerate, and improves spinning performance. It is to develop a cooling air rectifier for a spinning cooling device.

  In order to solve the problems to be solved by the above-described invention, emphasis is placed on the fact that the gaps of the spinning cylindrical cooling air rectifier are arranged radially when viewed from the center of the cylinder and are inclined. I put it. Each claim will be described below.

  The invention described in claim 1 of the present invention is a cooling air rectifier of a spinning device that cools melt spinning in a process of producing a spinning by discharging a melted synthetic fiber resin from pores. Forming a cylindrical body while laminating and laminating a strip-shaped metal tape having a substantially uniform concavo-convex shape with a certain inclination angle, joining the strip-shaped metal that is laminated and contacting, and connecting the inner and outer wall surfaces of the cylindrical body A cylindrical cooling air rectifier of a spinning cooling device, characterized in that it includes a group of inclined radial pores that pass therethrough.

  The invention described in claim 2 is a cooling wind rectifier of a spinning device that cools melt spinning in a process of producing a spinning by discharging a melted synthetic fiber resin from pores, and the surface shape of both surfaces is long. A cylindrical body is formed by laminating and laminating a band-shaped metal tape having a substantially uniform concavo-convex shape in a direction with a certain inclination angle, and the band-shaped metal that is laminated and contacted is joined, and the inside and outside of the cylindrical body are joined A cylindrical cooling air rectifier of a spinning cooling device, characterized in that it has a group of inclined radial pores passing through a wall surface.

  According to a third aspect of the present invention, there is provided a cooling air rectifier of a spinning device that cools melt spinning in a process of producing a spinning by discharging a melted synthetic fiber resin from pores, wherein the first side is a flat surface. , Forming a cylindrical body while rotating and laminating a band-shaped metal tape having a surface shape of the second one surface having a substantially uniform concavo-convex shape in the longitudinal direction with a certain inclination angle, and laminating and contacting the band-shaped metal And a cylindrical cooling air rectifier of a spinning cooling device, comprising a slanting radial pore group passing through the inner and outer wall surfaces of the cylindrical body.

  The invention described in claim 4 is the cylindrical cooling air rectifier of the spinning cooling device according to any one of claims 1 to 3, wherein the uneven shape is a corrugated shape.

  The laminated strip metals can be joined and integrated using a joining method such as diffusion bonding, brazing, electrical resistance welding, high-frequency heating welding, or the like.

  The melt spinning discharged from the nozzle is cooled by the cooling air blown from the cooling air rectifier of the cooling device, and becomes solidified spinning. At this time, if turbulent flow occurs in the cooling air, or if non-uniform cooling air is applied to the melt spinning immediately after discharge, it may cause yarn breakage or non-uniform spinning, hindering the production of high-quality spinning, and reducing production efficiency. I will drop it. For this reason, it is important for the cooling air rectifier to have a structure for obtaining stable rectified cooling air that does not cause turbulent flow in the cooling air.

In the cylindrical cooling air rectifier of the present invention, the surface of the metal strip (metal tape) is wound into a wave shape or a groove structure, and is laminated to create a uniform air gap, thereby succeeding in making a controllable and stable rectification. ing. The effects of the cylindrical cooling air rectifier of the present invention are summarized as follows.
-Since the cooling air rectifier is made of metal, it has heat resistance and can be applied to high-temperature spinning cylinders.
・ Because it is a metal, it is not only easy to clean, but also has a recyclability for cleaning, and the disposal of the cooling air rectifier is unnecessary (reusable), reducing the environmental load.
・ Spinning performance is improved by improving the rectifying effect.
-By adjusting the surface shape of the metal strip, the depth of the groove, and the like, a cooling air rectifier with an arbitrary opening (filtration accuracy) can be obtained.
-By laminating at an inclination angle, the cooling air in the downward direction can be blown radially to the melt spinning, softly hitting the melt spinning, and it is possible to prevent heat turbulence and side wind. As a result, high-quality and stable spinning production is possible.
-Since the inclination angle can be given in the form of winding and laminating a metal band, the inclination angle can be freely adjusted and manufactured within a range of up to about 45 degrees. Further, the outer diameter and the wall thickness of the cylindrical cooling air rectifier can be arbitrarily adjusted by the width and winding diameter of the metal strip.

  The best mode for carrying out the invention will be described with reference to the drawings. FIG. 1 shows a part of a spinning production apparatus using a melted synthetic fiber resin. A molten synthetic fiber resin f00 such as a polymer is fed into the plate tube 210. The tube tip 211 (nozzle) is fitted into a ring-shaped base 230, and the molten synthetic fiber resin f10 discharged from the tube nozzle is a ring-shaped f20 (spun, also referred to as “filament”). It is ejected to the cooling device 1. The melt-spun fiber that has passed through the cooling device is rapidly solidified and wound as a cooled fiber on a winding roller (not shown). The cooling air w00 is sent from the lower part of the cooling device, and rises in the upper direction through the gap 111 (hollow part) between the outer wall 110 and the cooling air rectifier 120. Since the cooling air w00 has a gap in the cooling air rectifier 120, while passing through the cavity 111, the cooling air is blown into the cylinder from the gap to cool the spinning f20. Since the air gap of the cooling air rectifier of the present invention has an angle, the cooling air w10 blows downward by θ degrees with respect to the horizontal direction. That is, the wind is soft against spinning.

  An example of the structure of a metal strip (metal tape) for making the above cylindrical cooling air rectifier is shown in FIGS. FIGS. 2 to 5 show the surface of the metal strip 121 in a groove shape. FIGS. 2 and 4 show a groove shape on one side, and FIGS. 3 and 5 show a groove shape on both sides. The groove can be formed from a metal strip by a rolling roller. It can also be formed by an etching method. This groove will create a void. FIG. 6 shows an example of waveform processing, in which both surfaces have a uniform waveform. The cylindrical cooling wind rectifier 120 shown in FIG. 8 can be obtained by winding the metal strip 121 subjected to the grooves and corrugations into a cylindrical shape as shown in FIG. This cylindrical body is the cooling air rectifier of the present invention. Stainless steel, carbon alloy steel, aluminum, brass and the like can be used as the metal strip material. In addition, simply winding and laminating does not provide stability (the cylinder shape cannot be maintained), so the metal band joint is joined by diffusion bonding, brazing, electrical resistance welding, high-frequency heating welding, etc. after winding. .

  As can be seen from the cross-sectional view of the cooling air rectifier of FIG. 7, the valley 121a (see FIGS. 2 to 6) between the groove peak 121b and the wave peak 121b becomes the gap 121a. Therefore, the width and shape of the gap can be freely adjusted by adjusting the interval between the peaks and the depth of the valleys. Further, depending on the selection of the width d of the metal strip 121 and the number of windings, the outer diameter D, the wall thickness d 'and the length l can be freely adjusted as shown in FIG. Can do. Note that when winding at an inclination angle of 0 degrees, d = d ′.

  FIG. 9 shows a cross section of the cylinder 120 when the metal strip 121 is wound around the outer diameter D with an inclination angle of θ degrees. This θ degree is also the angle of the air gap. Therefore, the thickness d ′ of the cylindrical cooling air rectifier 120 is d · cos (θ). By winding this inclination angle in the range of 0 to 45 degrees, the blowing angle of the cooling air can be determined. As a result, downward cooling air w10 can be created, turbulent flow due to the heat of melt spinning can be prevented, and rectification can be obtained.

It is sectional drawing of the spinning manufacturing apparatus (part) seen focusing on the cooling device. It is a perspective view which shows the example of the metal strip which gave the single-sided groove process. It is a perspective view which shows the example of the metal strip which gave the double-sided groove process. It is a perspective view which shows the example of the metal strip which gave the single-sided groove process. It is a perspective view which shows the example of the metal strip which gave the double-sided groove process. It is a perspective view which shows the example of the metal strip which shape | molded the waveform. It is a perspective view of a cylindrical cooling air rectifier for explaining a process of manufacturing a cylindrical cooling air rectifier with grooves and corrugated metal bands. It is a perspective view of the cylindrical cooling wind rectifier manufactured with the groove | channel and the corrugated metal strip. It is sectional drawing of the cylindrical cooling wind rectifier for demonstrating the process in which a cylindrical cooling wind rectifier is manufactured with the inclination | tilt angle (theta) with a groove | channel or a corrugated metal strip.

Explanation of symbols

1 Spinning cooling device (filamentous cooling device)
110 outer wall 111 gap (cavity, passage of cooling air)
120 Cylindrical cooling air rectifier (cooling air rectifier)
121 Metal strip (metal tape)
121a Valley (void)
121b mountain 200 spin pack 210 plate tube 211 nozzle (discharge port, tube tip)
230 Spinneret 3 Spencer (Seal Plate)
f00 Melt synthetic fiber resin (polymer, etc.)
f10 Molten synthetic fiber resin (resin in the tube)
f20 melt spinning or simply spinning (solidified spinning)
Yarn, yarn, spinning beam and filament are used in the same meaning. W00 Cooling air (cooling air before passing through cylindrical cooling air rectifier)
w10 Cooling air (cooling air that passed through the cylindrical cooling air rectifier)

Claims (4)

In the cooling wind rectifier of the spinning device that cools the melt spinning in the process of producing the spinning by discharging the melted synthetic fiber resin from the pores,
Forming a cylindrical body while laminating and laminating a strip-shaped metal tape having a substantially uniform concavo-convex shape in the longitudinal direction with a constant inclination angle, joining the strip-shaped metal that is laminated and contacting, A cylindrical cooling air rectifier of a spinning cooling device, characterized in that it includes a group of inclined radial pores passing through inner and outer wall surfaces. In the cooling wind rectifier of the spinning device that cools the melt spinning in the process of producing the spinning by discharging the melted synthetic fiber resin from the pores,
Forming a cylindrical body while rotating and laminating a band-shaped metal tape having surface irregularities in the longitudinal direction of both surfaces with a certain inclination angle, and bonding the band-shaped metal contacting the laminated layer, A cylindrical cooling air rectifier for a spinning cooling apparatus, comprising a slanting radial pore group passing through the inner and outer wall surfaces of the cylindrical body. In the cooling wind rectifier of the spinning device that cools the melt spinning in the process of producing the spinning by discharging the melted synthetic fiber resin from the pores,
A cylindrical body is formed by swirling and laminating a band-shaped metal tape having a flat surface on the first side and a substantially uniform concavo-convex shape in the longitudinal direction on the second side, with a predetermined inclination angle. A cylindrical cooling air rectifier of a spinning cooling apparatus, comprising a slanted radial pore group that joins strip-shaped metals that are in contact with each other and passes through inner and outer wall surfaces of the cylindrical body. The cylindrical cooling air rectifier of the spinning cooling device according to claim 1, wherein the uneven shape is a wave shape.