JP2002348042A - Fluff suppressing method for automatic winder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluff suppressing method for automatic winder capable of performing a stable fluff suppression in a multiple disc type fluff binding treatment by keeping the slip between a disc and a spun yarn in a proper range. SOLUTION: During a general winding in the state with yarn speed 600-1600 m/min and disc diameter 40-50 mm, the rotating speed of the disc is set to 5000-22000 rpm, or the following relation is satisfied when the yarn speed is S (m/min) and the circumferential speed of the disk is D (m/min): (D/S)×(S/1000)=0.7-3.5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling fluff of an automatic winder using a fluff controller for controlling the fluff of spun yarn by rotating a plurality of disks.

[0002]

2. Description of the Related Art A spinning bobbin (an example of a yarn supply package) wound with a spun yarn produced by a ring spinning machine is transported to an automatic winder (an example of a winding machine). In this automatic winder, a spun yarn wound around a ring spinning bobbin is removed, and spun yarns from a large number of spun bobbins are joined to be wound back into a cone or cheese-like winding package.

The rewinding process using an automatic winder is a process of applying a tension to a spun yarn unwound from a spinning bobbin and winding the spun yarn through a number of yarn guides to form a package. Therefore, each time a spun yarn formed by twisting short fibers passes through a yarn guide or the like, friction occurs, and the fluff existing in the spun yarn of the spinning bobbin before rewinding tends to increase after rewinding.

For this reason, in the rewinding process using a winding machine such as an automatic winder, a fluff control device is provided in the yarn traveling path to suppress the generation of fluff. This fluff control device is provided with a plurality of friction disks, and by rotating the plurality of disks, a false twist is applied to the spun yarn traveling at the operation position, and the fluff projecting from the surface of the spun yarn constitutes the spun yarn. There is a multi-disc type that performs a fluff binding process by being wound around a fiber.

[0005]

However, it has been found that when performing the fluff binding process of the multiple disk system, a fixed fluff suppressing effect is not always obtained, and there is a problem that fluff suppression is not stable. Was. That is, when the disk rotation speed is too fast with respect to the yarn speed, the slip in the disk rotation direction generated between the spun yarn and the disk becomes large, and when the disk rotation speed is too slow, the slip in the yarn traveling direction becomes large. It was also found that effective fluff control could not be performed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and relates to the relationship between the disk rotation speed (peripheral speed) and the yarn speed, that is,
An object of the present invention is to provide a method for suppressing fluff of an automatic winder in which a stable fluff can be suppressed when performing a fluff binding process using a plurality of discs by maintaining a slip between a disc and a spun yarn in an appropriate range. And

[0007]

According to a first aspect of the present invention, there is provided a fluff suppressing method comprising: a plurality of yarns that are unwound from a yarn supplying package and rotate at a predetermined yarn speed in contact with a spun yarn wound on a winding package; In a fuzz suppression method for an automatic winder in which fluff of a spun yarn is controlled by rotation of a disk, the rotation of the disk during normal winding at a yarn speed of 600 to 1600 m / min and a diameter of the disk of 40 to 50 mm. The number is set to 5000 to 22000 rpm. The number of rotations of the disk is 5000-22000r
pm, the diameter suitable for processing the spun yarn is 40-50.
mm disk, and the yarn speed of the automatic winder is 600
In the range of 抑制 す る 1600 m / min, fluff can be effectively suppressed.

According to a second aspect of the present invention, there is provided a fluff suppressing method comprising the steps of: rotating a plurality of disks which are unwound from a yarn supply package and contacted with a spun yarn wound at a predetermined yarn speed and rotated; In the method for controlling fluff of an automatic winder for controlling fluff, the yarn speed is set to S (m / mi).
n) and the peripheral speed of the disk is D (m / min), (D / S) × (S / 1000) becomes 0.7 to 3.
5 is set. Assuming that the peripheral speed of the disk is D, fuzz can be effectively suppressed when (D / S) × (S / 1000) is in the range of 0.7 to 3.5.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for suppressing fluff of an automatic winder according to this embodiment will be described. First, an automatic winder using the disk-type fluff controller will be described with reference to FIG. 1, and the disk-type fluff controller will be further described with reference to FIGS.

FIG. 1 is an arrangement diagram of the automatic winder 1. The automatic winder 1 includes an unwinding assisting device 2, a tension applying device 3 also serving as a twist preventing device, a friction disk type fluff control device 4, a yarn joining device 5, a slab, in the winding direction of the spun yarn Y of the yarn supplying package B. A catcher 6 and a drive drum 7 are arranged in this order, and a control unit (control means) 50 for controlling these devices is further provided.

A tension applying device 3 also serving as a twist preventing device is provided with a yarn supplying package B (a yarn supplying wound body) via an unwinding assisting device 2.
And a fuzz control device 4 and a gate type in which movable comb teeth 12 are alternately arranged with respect to fixed comb teeth 11. The comb teeth 12 can be engaged with or released from the comb teeth 11 by a swing lever (not shown), and the degree of the urging force by the swing lever is variable by an actuator. The urging force applied to the movable comb teeth 12 serves to apply a predetermined tension to the spun yarn Y that is passed between the fixed comb teeth 11 and the movable comb teeth 12 in a zigzag manner. The tension applying device 3 also functions as a twist stopping device that restricts the propagation of twist to the yarn supply package B due to the false twisting action of the fluff controller 4 at the portion where the comb teeth 11 and the comb teeth 12 mesh. I do. During winding, the control unit 50
Control is performed to change the tension applied by the tension applying device 3 based on a preset fluctuation pattern. Thereby, the tension of the spun yarn Y supplied to the fluff controller 4 can be made substantially constant, and stable fluff control can be achieved.
Note that the tension of the traveling spun yarn Y is continuously detected by the tension detector T, and the control unit 50 feedback-controls the applied tension by the tension applying device 3 so that the detected tension value becomes a set value. It may be.

The fluff controller 4 is configured to unwind a spinning yarn Y unwound from a spinning bobbin (yarn supply package) B and form a disk 15 on a spun yarn Y wound as a winding package P (winding winding body) on a winding tube Bf. By performing false twisting, the fluff is twisted into the fiber group constituting the spun yarn Y. Further, the fluff control device 4 simultaneously applies a feeding force to the spun yarn Y by the rotation of the disk 15. FIG.
FIG. 3 is a layout view of the disk 15 of the fluff control device 4, and FIG. 3 is a front view of the disk 15 of the fluff control device 4.

2 and 3, the fluff control device 4 disposed below the yarn splicing device 5 (upstream in the yarn running direction).
Comprises a plurality of friction disks 15, a first drive shaft 16, a second drive shaft 17, a third drive shaft 18, a rotary drive 19, and a thread pushing lever (not shown).

As shown in FIGS. 2 and 3, each disk 15
Are provided on each of the first to third drive shafts 16 to 18 arranged substantially parallel to the support block (two in the illustrated example). The rotation driving device 19 includes first to third
The disks 15 of the drive shafts 16 to 18 are simultaneously rotated in the same direction.

As shown in FIG. 2, the first to third drive shafts 16 to 18 in the fluff suppression processing state are each apex a to c of an equilateral triangle as viewed from above so as to be parallel to the yarn path. And disks 15 having different axes are arranged so as to partially overlap in the radial direction. First to third drive shafts 16 to
Each of the disks 15 of the third drive shaft 18 is
The drive shaft 17, the first drive shaft 16, the third drive shaft 18, the second drive shaft 17, and the first drive shaft 16 are arranged so as to be shifted in the axial direction in this order.

By rotating the first to third drive shafts 16 to 18 in the same direction, the drive shafts 16 are passed through the central portion A between the disks 15 and bent in a zigzag shape by contact with the peripheral surface of each disk 15. The spun yarn Y is subjected to S-twisting or Z-twisting false twisting. Also, the shape of the peripheral surface of the disk 15 with which the spun yarn Y comes into contact in the yarn running direction is different from that of the disk 15 with respect to the spun yarn Y.
Is generated downstream in the yarn traveling direction. For this reason, the fluff controller 4 sends out the spun yarn Y to the winding package P side at the same time as the false twisting. Here, the central portion A is an inner portion of intersections d to f of the peripheral surfaces of the disks 15 of two different shafts partially overlapping in the radial direction of the first to third drive shafts 16 to 18 (three different drive shafts). (A common overlapping portion of the shaft disk 15). A spun yarn Y can be held at the center A (action position) by a yarn pushing lever (not shown).

The yarn splicing device 5 performs a yarn splicing process for joining the spun yarn Y (yarn end) on the yarn supply package B side and the spun yarn Y (yarn end) on the winding package P side. is there. The yarn splicing device 5 includes a yarn splicing device main body 35, a lower yarn suction guide member (lower yarn guiding means) 36 that guides the yarn end of the yarn supply package B to the yarn splicing device main body 35, and a winding package P.
An upper thread suction guide member (upper thread guide means) 37 for guiding the yarn end on the side to the yarn joining device main body 35 is provided. The lower thread suction guide member 36 serving as the yarn supply side thread end guide means has a freely openable and closable suction port 36a (yarn catching port) below the tension applying device 3 (upstream side).
1 (the state shown in FIG. 1) is a standby position, and can be turned vertically about the shaft 36b. That is,
In the standby state during the winding of the lower thread suction guide member 36, the suction port 36a serving as the thread catching port is positioned upstream of the fluff controller 4 (between the fluff controller 4 and the yarn supply package P8). When the yarn is cut, the yarn end (lower yarn) on the yarn supply side can be immediately caught. Thereby, it is possible to prevent the yarn end on the yarn supply side from being wound around the disk 15 of the fluff controller 4 at the time of yarn cutting. When the spun yarn Y is forcibly cut, the fluff control device 4 and the tension applying device 3 serving as a twist preventing device are opened, and the yarn end on the yarn supply side is sucked into the suction port 36a of the lower yarn suction guide member 36. . When the lower thread suction guide member 36 is rotated from the lower standby position to the upper guide position while holding the yarn end (lower thread) at the suction port 36a, the lower thread is in the yarn splicing device main body 35 and in the tension applying device 3. And the fluff control device 4. To open the fluff controller 4 means to move the above-described thread pushing lever from the thread holding position to the retracted position. Instead of providing the thread pushing lever, one of the drive shafts 16 to 18 is moved. The drive shafts 16 to 1 are provided so that they can be opened and closed freely and can be opened and closed when cutting the thread.
8 may be immediately opened. The upper thread suction guide member 37 has a suction port 37a, and is rotatable vertically about a shaft 37b. When the spun yarn Y is forcibly cut, it turns from the lower standby position to the upper yarn end capturing position, and sucks and captures the yarn end (upper yarn) wound on the winding package P by the suction port 37a. Further, by turning downward, the upper thread is guided to the yarn joining device main body 35.
Then, in the yarn splicing device main body 35, the upper yarn and the lower yarn are spliced using a fluid such as compressed air, for example.

The slab catcher 6 is, for example, a capacitance-type or optical-type yarn thickness detecting device, and detects a yarn defect such as a slab by processing a signal from the slab catcher 6 by an analyzer 40. When a yarn defect is detected, the spun yarn Y being wound up is cut by the attached cutter 6a,
In the piecing operation performed by the piecing device 5, a defective portion is removed, and the yarn end on the yarn supply package B side and the yarn end on the winding package P side are spliced.

When the drive drum 7 rotates while the spun yarn Y is connected between the yarn supplying package B and the winding package P, the spun yarn Y of the yarn supplying package B is
And the spun yarn Y travels upward from below. When the spun yarn Y travels, the slab catcher 6 detects a variation in the thickness of the yarn.
Outputs the yarn running signal FW to the control unit 50.

The drive drum 7 is configured as a traverse drum having a traverse groove. The drive drum 7 comes into contact with the take-up package P to rotate the take-up package P, and also controls the spun yarn Y to be taken up by the take-up package P. Do a traverse exercise. The drive drum 7 is driven by a motor 41 whose rotation speed is controlled by an inverter 42. Based on the control signal output from the control unit 50, the motor 4
1 is controlled.

The control unit 50 includes an input device 51 and controls the driving of the driving drum 7, the driving of the tension applying device 3, the control of the fluff control device 4 (rotation control of the disk 15), and the driving of the yarn splicing device 5. Perform control. In the automatic winder, the spun yarn Y is drawn out of the yarn supply package B and wound by the driving drum 7 which comes into contact with the winding package P.

Next, a method of suppressing fluff in the above-described automatic winder 1 will be described. When the yarn supply package B is replaced or the yarn breaks, a yarn splicing operation is performed, and thereafter, the winding of the spun yarn Y by the drive drum 7 is started. In FIG. 1, when the yarn traveling signal FW is output to the control unit 50, that is, when it is confirmed that the piecing process has been successful, the control unit 5
0 starts driving of the fluff control device 4 (starts rotating the disk 15). This state is shown in FIG. In FIG. 4, the rotation of the disk 15 is performed so as to be substantially the same as the rise of the yarn speed or earlier than the rise of the yarn speed.

The fluff controller 4 includes a winding condition (spun yarn Y).
Regardless of the size, a disk 15 having a diameter of 40 to 50 mm is used. The traveling speed of the spun yarn Y by the driving drum 7 of the automatic winder 1 is 600 to 1600 m /
min. For such a use state, the rotational speed R of the disk 15 is set to 5000 to 22000 during the yarn traveling (after the completion of the start of the yarn speed in FIG. 4).
rpm. Preferably, 8000 to 16000 rp
m. The present invention requires that the tension of the spun yarn Y and the degree of slip between the spun yarn Y and the disk 15 be maintained within predetermined ranges in order to achieve and maintain a good fuzz suppression effect by the fuzz control device 4. Based on finding. When the rotation speed R is low, the tension of the spun yarn Y (winding tension) increases, the degree of slip between the spun yarn Y and the disk 15 falls outside a predetermined range, and the fluff suppressing effect decreases. Therefore, it is only necessary to increase the rotation speed R, but it has been found that there is a limit. If the number of revolutions R is too fast, the tension (winding tension) of the spun yarn Y decreases, and the degree of slip between the spun yarn Y and the disk 15 falls out of a predetermined range. Decrease. Such findings were unknown.

If the peripheral speed of the disk 15 is D (m / min) and the yarn speed is S (m / min), (D / S) ×
(S / 1000) is set to 0.7 to 3.5. Disc 1
If the peripheral speed of No. 5 is too high, the tension (winding tension) of the spun yarn Y decreases, and the fluff suppressing effect decreases. Then, the rotation speed R
Should be slowed down, but it turns out there is a limit. The fluff increases even if the rotation speed R increases or decreases. Such findings were not known.

The embodiment described above can be modified and implemented as follows. (1) In the case where the thread pushing lever is used, one of the three drive shafts 16, 17, 18 can be opened and closed with respect to the remaining drive shafts 16, 18 so that the operating area is The thread may be inserted into the thread.

(2) The rotation speed of the disk 15 does not need to be constant according to the yarn speed.
It is also possible to increase or decrease as the winding progresses. In this case, the rotation speed of the disk 15 may be feedforward controlled (sequence control) according to a preset speed fluctuation pattern, or a tension detector may be provided on the yarn path, and the rotation of the disk 15 may be controlled based on the detected tension value. The number may be feedback controlled. In any case,
It is important to maintain the rotation speed and / or the peripheral speed of the disk 15 so as to satisfy the above-mentioned relational expression.

[0027]

An embodiment will be described below with reference to FIGS. [Example 1] Using a fluff controller using a disk 15 having a diameter of 45 mm, a yarn feeding package of cotton yarn Ne30 was rewound onto a winding package at a yarn speed of 600 m / min, and the spinning wound on a winding package P In the yarn Y, the number of fluffs having a length exceeding 3 mm per 10 m was detected. At this time, the rotation speed of the disk 15
It was changed in 8 steps during 32000 rpm. For comparison, the number of fluff of the spun yarn Y wound on the spinning bobbin before passing through the fluff controller was also measured. The number of fluff was detected with a commercially available fluff measuring instrument. This fluff measuring device counts the number of fluffs crossing the optical axis passing through a point 3 mm away from the spun yarn.

In FIG. 5, those indicated by KD are:
The number of fluffs of the spun yarn Y after performing the fluff binding process using the fluff control device is indicated. COP indicates the number of fluff of the spun yarn Y before performing the fluff binding process using the fluff control device. Is shown. As shown in FIG. 5, when the disk rotation speed is low and when the disk rotation speed is high, the fluff after the fluff binding process by the fluff controller increases. The tendency of increase / decrease in the number of fluffs after performing the fluff binding processing by the fluff controller is calculated by a polynomial and displayed by a black line. The effect of suppressing fluff appears at the bottom of the black line.

FIG. 8 shows a case where the above-mentioned (D / S) × (S / 1000) is used on the horizontal axis instead of the disk rotation speed. FIG. 8 shows the same tendency as FIG.

Example 2 The rewinding yarn speed was 1000
The conditions are the same as in Example 1 except that m / min was changed. As shown in FIG. 6, when the disk rotation speed is low and when the disk rotation speed is high, the number of fluffs increases after the fluff binding process by the fluff control device. The tendency of the increase and decrease of the number of fluffs after the fluff binding processing by the fluff control device was calculated by a polynomial and displayed by black lines. In FIG. 9, instead of the number of rotations of the disk, (D / S) × (S / 100
0) is shown on the horizontal axis. FIG. 9 also shows the same tendency as FIG. The effect of suppressing fluff appears at the bottom of the black line.

Example 3 The rewinding yarn speed was 1400
The conditions are the same as in Example 1 except that m / min was changed. As shown in FIG. 7, when the disk rotation speed is low and when the disk rotation speed is high, the fluff after the fluff binding process by the fluff control device increases. The tendency of the increase and decrease of the number of fluffs after the fluff binding processing by the fluff control device was calculated by a polynomial and displayed by black lines. Further, in FIG. 10, instead of the disk rotation speed, (D / S) × (S / 100)
0) is shown on the horizontal axis. FIG. 10 also shows the same tendency as FIG. The effect of suppressing fluff appears at the bottom of the black line.

Looking at the common portions at the bottoms of the black lines in Examples 1 to 3, the rotational speed R of the disk 15 is 5000 to 2
Excellent fuzz suppression effect is seen in the range of 2000 rpm,
It is found that the range is preferably from 8000 to 16000 rpm, and more preferably from 10000 to 15000 rpm. Also, (D / S) × (S / 100)
When 0) is used, an excellent fuzz-inhibiting effect is observed in the range of 0.7 to 3.5, and it is found that it is preferably in the range of 1.1 to 2.3.

[0033]

According to the method for suppressing fluff in an automatic winder according to claim 1 or 2, there is an effect that fluff can be effectively suppressed using a friction disk type fluff controller.

[Brief description of the drawings]

FIG. 1 is a front view showing a device arrangement of an automatic winder used in a fluff suppressing method of the present invention.

FIG. 2 is a layout diagram of disks of the fluff control device.

FIG. 3 is a front view of a disk of the fluff control device.

FIG. 4 is a graph showing the rise of disk rotation of the fluff control device.

FIG. 5 is a graph showing fluff suppression.

FIG. 6 is a graph showing fluff suppression.

FIG. 7 is a graph showing fluff suppression.

FIG. 8 is a graph showing fluff suppression.

FIG. 9 is a graph showing fluff suppression.

FIG. 10 is a graph showing fluff suppression.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic winder 4 Fuzz control device 15 Disk 16 1st drive shaft 17 2nd drive shaft 18 3rd drive shaft Y Spun yarn B Yarn supply package P Winding package

Claims (2)

[Claims] An automatic winder for controlling fluff of a spun yarn by controlling rotation of a plurality of discs which are unwound from a yarn supply package and contacted with a spun yarn wound at a predetermined yarn speed and rotated by a winding package. In the method, the yarn speed is 600 to 1600 m / min, the disk diameter is 40 to 50 mm, and the number of rotations of the disk during normal winding is 5,000 to 22,000 rpm. Suppression method. 2. A fluff suppression of an automatic winder that controls fluff of a spun yarn by rotating a plurality of discs that come into contact with and rotate a spun yarn that is unwound from a yarn supply package and wound at a predetermined yarn speed in a winding package. In the method, the yarn speed is S (m / min) and the peripheral speed of the disk is D.
(M / min), (D / S) × (S / 100
0) is 0.7 to 3.5, wherein the method for suppressing fluff of an automatic winder.