JP2000282321A - Winding of yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably take up yarn without causing interference between yarns, to improve production efficiency and to reduce a capital investment by setting a yarn winding angle of each godet roll smaller than fixed value and using a plurality of godet rolls of even number. SOLUTION: In drawing and heat-treating a synthetic fiber yarn by a plurality of godet rollers and winding the yarn on a winder, a yarn winding angle of each godet roller is set smaller than 360 degrees and two or more godet rollers of even number are used to take up the yarn. Preferable spindles 8 and 9 for winding the yarn are vertically arranged on a frame 10 constituting the skeleton of the winder. Preferably the total of guide winding solid angles of each yarn for connecting a swing support guide installed at the upper side of traverses of drums wound at both ends of the winder to a yarn dividing outlet guide arranged at the final roll outlet of the yarn is <=50 degrees.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for winding a yarn. More specifically, the present invention relates to a method for winding a synthetic fiber yarn.

[0002]

2. Description of the Related Art When a synthetic fiber yarn is drawn and wound, FIG.
As shown in FIG. 4, usually, the feed rolls 23 and 17 and the draw rolls 18 and 19 are one set of two godet rolls, and two or more godet roll pairs are used in order to obtain a target yarn characteristic value. As shown in FIG. 17, the thread is drawn around each godet roll pair several times and stretched and heat-treated.

[0003] Recently installed multi-filament yarns and high-speed equipment are generally used, and it has become common to wind eight or more yarns at a speed of 4000 m / min or more. However, if the number of windings of the yarn on the godet roll at the time of drawing is the same as the conventional number, it is necessary to lengthen the godet roll by the number of yarns. If you try to reduce the pitch P ₁ of the yarn on Goderoru, by the thread swing on Goderoru yarn is likely large overlap with each other yarn, the single fiber in the yarn is broken during the interference, The phenomenon of moving to another yarn, so-called single yarn movement, occurs. To avoid this, each yarn is usually run on a god roll at a pitch of about 4 mm or more.

[0004] The cause of the yarn sway is determined by the relationship between the thread gripping force of the goderol and the string vibration force. In other words, the yarn is held at a predetermined position on the surface of the godet roll by the centripetal force, which is the tension applied to the yarn and the centripetal force from which the centrifugal force is subtracted, that is, the yarn gripping force.

However, the godet roll rotates at a high speed, and if the roll is long, a large amount of accompanying air flow is generated, and the string vibrates between the pair of two godet rolls. The force will be greater and the thread will sway on the goderol. To avoid this entrainment,
A device for arranging the airflow blocking plate 20 near the goderol as shown in FIG. 18 is known as a known technique (for example, Japanese Patent Application Laid-Open No. 58-26767).

On the other hand, in order to cope with multiple yarns, a multi-yarn winder for winding two or more yarns on a single spindle has become widespread. At present, eight yarns as shown in FIG. Winding machines that can wind at the same time have become popular. Further, as shown in FIG. 16, a method of arranging two winding machines side by side to double the number of yarns and winding is also implemented.

However, in any case, in the current Nelson method of taking a godet roll, in order to secure the stability of the running yarn, the length of the roll is limited due to the limitation of the roll length.
The yarn was at its limit. In addition, there is a certain limit to the spindle length of the winder, and the spindle length that can be supported at one end in a cantilever manner depends on the winding amount. is there. To further increase the length of the spindle, it is necessary to support the spindle from the tip in order to suppress vibration.However, since the bearing that supports the spindle tip is arranged on the operation surface side of the winder, remove the bearing when switching the drum. Such operations are required, and the operations are complicated and not widely used.

Further, as shown in FIG. 15, the yarn sent out from the godet roll has a yarn path angle between the guide 21 at the exit of the godet roll and the swing fulcrum guide 22 at an angle a ₁ of the yarn at both ends and an angle a ₂ of the yarn at the center. Since the yarn tension during winding varies depending on the degree of guide rubbing at each running position of the yarn, a uniform winding drum form cannot be obtained between the yarns. Even from these restrictions, it can be said that the spindle length is 1200 mm longest in the current winding technology.

[0009]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a technique for exceeding such a conventional limit of the number of winding yarns and winding the number of yarns at least twice the conventional upper limit. It is assumed that.

[0010]

In order to solve this problem, a method of winding a yarn according to the present invention mainly has the following configuration. That is, when the melt-spun synthetic fiber yarn is stretched and heat-treated by a plurality of godero rolls and wound, the wrap angle of each godero roll is less than 360 degrees, and an even number of two or more godero rolls is used. This is a method of winding the yarn.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for winding a yarn according to the present invention will be described below in detail with reference to the drawings. In the method of winding a yarn according to the present invention, the angle of winding the yarn around each godero is less than 360 degrees. When the yarn winding angle is 360 degrees or more, the running positions of the yarns on the godet roll become the same, so that the yarns overlap and so-called single yarn movement occurs.

In the conventional Nelson type take-off method, the equipment tends to be heavy equipment. Therefore, in the present invention, not a method using a Nelson roll in which two pairs of goderols are combined, as shown in FIG. It employs a stretching heat treatment technique constituted by combining a plurality of single goderols.

In this method, the winding angle is less than 360 degrees without winding the yarn around the godet roll many times, and the yarn wound less than once is transferred to the next downstream goderol, and the length of the godero roll is reduced. May have a length commensurate with the number of yarns. Yarn pitch indicated by P ₂ in FIG. 13, the take-off method of the conventional Nelson method whereas that ensure the order of 4 millimeters were close to the upper limit, is employed in the present invention,
In the case of drawing heat treatment using a combination of one godet roll alone, the yarn pitch can be increased to about 8 mm, and stable yarn running can be expected without overlapping yarns even if yarn sway occurs.

However, in the case of heat treatment of the yarn, if the single fiber fineness of the yarn is large, the heat treatment may be insufficient if the yarn is wound around the godet roll less than once. As shown in FIG. 12, there is a method of increasing the diameter of the heated goderol 3 for heat treatment to lengthen the heat treatment time. If further heat treatment is required, it is effective to increase the number of heat treatment rolls.

In the method of winding a yarn according to the present invention, FIG.
As shown in the above, the number of goderols in the stretching step is an even number of 2 or more. As shown in FIG. 6, when the number of gode rolls in the stretching step is an odd number, the direction of the traveling yarn 4 travels in the opposite direction to that of the winder, and it is necessary to change the direction by 180 degrees. The fixed guide 5 shown in FIG. 7 can also be used, but in this case, the friction between the yarn running at high speed and the guide increases, and the yarn is frayed and cannot be wound. In the case where the number of god rolls in the stretching step is an odd number, besides using such a fixed guide 5, as shown in FIG. 8, after the final heat treatment roll, a free roll or a forced drive roll (both are indicated by 6) )
It is possible to change the direction of the running yarn by using, but it is necessary to make the roll diameter small, so it must be rotated rapidly, and it can not follow with the free roll, while forced driving Rollers have a limited bearing life, and
The size is substantially the same as the diameter of the take-up roll, and eventually becomes equivalent to the arrangement of an even number of rolls.

The yarn sent out from the final roll is shown in FIG.
As shown in FIG. 1, the yarn is separated for each yarn by a yarn separating guide 7 arranged at the roll outlet for yarn path regulation. In the case of FIG. 1, the yarn is separated to a winding machine having two upper and lower spindles. Be guided.

In the winder, as shown in FIG. 1, revolving type spindles 8 and 9 are arranged in an upper frame and a lower frame on an integrally constructed frame 10 in order to wind multiple yarns. Normally, as shown in FIG. 4, when the number of yarns sent out from the final roll 25 is an even number, the total number of yarns is bisected from the center in the order of the yarns, and one half of the yarn group Is wound on the upper spindle and the other half is wound on the lower spindle. When the number of yarns is an odd number, the distribution of the yarns may be freely applied to the upper and lower spindles, but also in this case, the distribution method is preferably determined as appropriate based on the arrangement order.

Further, as shown in FIG.
The sum total of solid angles a ₃ ′ + a ₄ ′ and a ₃ + a ₄ of the guide winding solid angles of the respective yarns of the fiber separation exit guides 7 and 7 ′ downstream of the winding machine and the swing support guides 26 and 26 ′ at the upper stage of the winding machine are both Preferably it is within 50 degrees. Here, the guide winding solid angle of the yarn means a yarn winding guide angle of the traveling yarn.

As shown in FIG. 2, a winding machine 11 constituted by an integral frame and provided with spindles arranged vertically is provided with a winding machine 11 which is disposed adjacently and oppositely to the opposite direction. By arranging, the number of yarns can be further increased, which is preferable.

As shown in FIG. 9, in order for the user to use the drum continuously while deciphering the yarn,
It is necessary to connect the yarn end of the innermost layer of the drum, the so-called tail yarn 24, to the yarn end 12 of the outermost layer of the drum which will be used subsequently. At this time, it is preferable that the winding direction of the tail yarn on the bobbin is the same for all the drums. When the yarn is interpreted at high speed, by aligning the winding direction of the tail yarn on the bobbin like this,
The rotation direction in which the thread is interpreted does not suddenly reverse,
It is possible to effectively prevent the yarn breakage from being caused when the tail is shifted.

In order to align the winding direction 13 of the tail yarn on the bobbin in this manner, as shown in FIG. 10, the rotating direction of the spindle is switched by the drum in one of the winders arranged opposite to each other. Previous spindle rotation direction 14
In the same manner as before the drum switching, the tail forming 16 starts the winding from the opposite side to the direction opposite to the drum switching, so that the winding direction 13 of the tail thread wound on the bobbin is aligned in the same direction for all the drums. be able to.

In order to reduce the equipment cost of the winding machine, if the revolving winding devices arranged vertically and horizontally as shown in FIG. 3 are constituted by an integral frame, a less expensive winding machine can be provided. Is preferred.

[0023]

According to the present invention, it is possible to stably take up more than twice the number of yarns on the roll without interference between the yarns on the roll, and the production efficiency is more than doubled and the conventional equipment is improved. Only half the number is required, and it is possible to provide a drastically high-efficiency facility with a large effect such as a reduction in capital investment, an energy saving effect, a more efficient operation, and a reduction in equipment space by half.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of a winding device used in the yarn winding method of the present invention.

FIG. 2 is a side view showing another example of the winding device used in the yarn winding method of the present invention.

FIG. 3 is a side view showing another example of the winding device used in the yarn winding method of the present invention.

FIG. 4 is a front view showing an example of a winding device used in the yarn winding method of the present invention.

FIG. 5 is a side view showing an example of a winding device in which two or more even-numbered godet rolls are used for the yarn winding method of the present invention.

FIG. 6 is a partial side view showing an example of a winding device in which an odd number of godet rolls are arranged.

FIG. 7 is a partial side view showing an example of a winding device in which an odd number of godet rolls are arranged and an exit guide for changing a yarn path is arranged downstream of a final godet roll.

FIG. 8 is a partial side view showing an example of a winding device in which an odd number of godet rolls are arranged and an exit roll for changing a yarn path is arranged downstream of a final godet roll.

FIG. 9 is a side view showing a state in which yarns of two drums are transferred to a tail.

FIG. 10 is a side view showing a state in which two winding machines are arranged opposite to each other to wind a yarn.

FIG. 11 is a side view showing an example of a winding device used in a conventional single-hanging winding method.

FIG. 12 is a side view showing another example of the winding device used in the conventional single-hanging winding method.

FIG. 13 is a partial front view showing a yarn pitch in a case where a winding method of a single hooking method is performed.

FIG. 14 is a side view showing an example of a winding device used in a conventional Nelson winding method.

FIG. 15 is a front view showing an example of a winding device used in a conventional Nelson winding method.

FIG. 16 is a side view showing an example of a conventional winding device in which two winding machines are arranged.

FIG. 17 is a partial front view showing the yarn pitch when the Nelson winding method is performed.

FIG. 18 is a partial side view showing an example in which an airflow shielding plate is arranged between rollers when a Nelson winding method is performed.

[Explanation of symbols]

1: Feed roll 2: Heat treated draw roll 3: Heat treated large diameter draw roll 4: Thread direction 5: Exit guide 6: Free roll or forced drive roll 7: Exit guide 8: Upper take-up spindle 9: Lower take-up spindle 10 : Integral frame 11: Integral frame arranged in opposite direction 12: Yarn end of outermost layer of drum 13: Tail winding direction 14: Drum rotation direction 15: Drum of winding machine arranged in opposite direction Rotation direction 16: Tail winding direction of drum wound by winders arranged opposite to each other 17, 23: Nelson roll serving as feed roll 18, 19: Nelson roll serving as draw roll 20: Airflow shielding Plate 21: Exit guide 22: Swing fulcrum guide 24: Tail yarn end of innermost layer of drum 25: Final roll 26, 26 ': Swing Support guide a _1, a _2: motion fulcrum guides the winding angle a _3, a ₃ ': min繊出port guide the winding angle a _4, a _4': motion fulcrum guides winding angle

Continued on the front page F term (reference) 3F051 BB06 4L045 DA42 DB07 DC11 DC23 DC30 DC34

Claims (4)

[Claims] 1. A yarn characterized in that, when a synthetic fiber yarn is stretched and heat-treated by a plurality of godero rolls and wound, the wrap angle of each godero roll is less than 360 degrees and an even number of two or more godero rolls is used. How to wind the strip. 2. A method for winding a yarn according to claim 1, wherein the winding is performed while vertically disposing a spindle for winding the yarn on a frame constituting a framework of the winding machine. 3. When the yarn fed from the final roll is separated and wound on upper and lower drums using a separation outlet guide, the yarn is disposed above the traverse of the drum wound at both ends of the winding machine. The sum of the solid angles of the guide windings of the respective yarns connecting the swinging fulcrum guide and the fiber splitting exit guide arranged at the final roll exit of the yarn is set to be within 50 degrees. The winding method of the described yarn. 4. A winding method for winding a group of yarns while alternately switching bobbins from a last godet roll for winding via a first godet roll for feeding, wherein two winding machines are opposed to each other. The bobbin in which the rotating direction of the spindles arranged opposite to each other is opposite to each other, and when the bobbin is switched, the tail forming position of the thread end formed first on the switched bobbin is the other full bobbin The yarn winding method according to claim 2 or 3, wherein the yarn is wound so as to be opposite to the tail forming position of the yarn end formed first.