JPH0735224B2 - Winding method in automatic winder - Google Patents

Description

The present invention relates to a winding method in an automatic winder.

[Conventional technology]

The spinning bobbin produced by the spinning machine, especially the ring spinning machine, is supplied to the winder in the next step and rewound to remove the yarn defect portion contained in the yarn and to wind it into a package with a predetermined yarn amount and shape. returned.

That is, in an automatic winder in which one or a plurality of winding units are arranged in parallel, a yarn is pulled out from a supplied spinning bobbin to a predetermined position of each winding unit by various feeding means, and the yarn is tensioned or waxed. After passing through each part such as a slab catcher, it is wound into a rotating package by a traverse drum in a cone or cheese shape. Usually, several to several tens of spinning bobbins are supplied and wound to obtain one package.

[Problems to be solved by the invention]

In such a winder, the spinning bobbin supplied as a yarn supply is produced by a ring spinning machine, that is, the yarn is wound around the outer circumference of a rod-shaped winding tube having a small diameter and the upper and lower sides of the winding tube are wound. When the yarn is drawn from the bobbin in the axial direction of the winding tube, the yarn unwound from the yarn layer travels upward while causing ballooning. Further, there is a portion called the chess portion on the outer peripheral surface of the thread layer, where the thread pull-out side end surface of the thread layer is inclined, and when the thread is pulled out from the chess portion, the upper layer thread becomes the lower layer thread. The yarns for one round of the bobbin may be unwound while being in contact with each other, and the yarns may be pulled out in the axial direction all at once, resulting in a wheel slippage state, so-called sluffing.

When the above-mentioned sluffing occurs, yarn breakage may occur, and in some cases, the gap may be clogged as a yarn block while the yarn is running.

In particular, the above-mentioned sluffing tends to occur as the winding speed, that is, the yarn unraveling speed becomes higher, and the occurrence of sluffing occurs in a high-speed winder of 2000 m / min or more. It is an important factor to increase the winding efficiency to keep it as low as possible.

The present invention is intended to solve the above problems.

[Means for solving problems]

In the present invention, when a yarn breakage due to sluffing occurs during winding, the winding speed after the yarn splicing is set to at least a speed lower than the normal winding speed at the beginning so that the yarn is wound.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of a winding unit for carrying out the present invention. Note that the automatic winder has a plurality of winding units (1) arranged in parallel.

The yarn unwound from the spinning bobbin (2) to the axial direction information of the winding tube (3) passes through the balloon breaker (4) and the tension device (5) to detect a yarn defect such as a slab catcher. The yarn runs through the yarn traveling slit of (6) while being checked at the yarn defect portion, and is wound into a package (8) which is rotated by the traverse drum (7).

During winding, the variation in the thickness of the thread passing through the slab catcher (6) is transmitted as an electric signal (9) to the clearer (1).
0), and by comparing with the reference value, it is judged that the yarn defect part exists when it exceeds the allowable range, and immediately the command signal (12) is sent from the clearer (10) to the cutter driving device (11). It is output and the yarn is forcibly cut by the operation of the cutter (13).

When the yarn is cut, the yarn feeler built in the slab catcher (6) or a separately placed feeler detects no yarn running, the yarn break signal (14) is detected, and then the yarn clearer (10) moves the traverse drum. Drive motor (15)
Is issued to stop the rotation of the drum (7), that is, the rotation of the package (8).

Then, a yarn splicing command signal (17) is issued to start the yarn splicing operation by the yarn splicing device (16), and the yarn splicing is performed by a known yarn splicing means.

Further, in FIG. 1, the traverse drum drive motor (15)
Is installed in each winding unit, and the motor (1
The rotation speed of 5) is controlled by the inverter (18) provided in each winding unit. That is, each unit is provided with a control circuit (19) for controlling the motor to the most suitable rotation speed from the winding condition of each unit,
The signal from the control circuit (19) causes the inverter (1
The rotation speed of the drum motor (15) is set via 8).

The preset drum rotation speed for the basic yarn speed or the ribbon breaker depending on the yarn type of all winding units that compose the winder is set from the signal line (20) extending from the central control unit installed separately to the inverter (18). Done through.

Next, winding control when sluffing occurs during winding will be described with reference to FIGS.

That is, FIG. 2 shows the first embodiment, and when a new spinning bobbin is supplied to the rewinding position of the unit to start rewinding (A), the drum motor is set to a preset initial rotation speed. It is accelerated to (V) (B), and winding is performed at a constant speed (V) (C). When sluffing occurs in the middle of the process (FIG. 2 (D)), the above-mentioned sluffing sensing means gives an abnormal signal and immediately the cutter (1) shown in FIG.
3) is activated and thread cutting is performed. A slab catcher (6), for example, can be applied as the sluffing sensing means. The slab catcher (6) normally detects the yarn defect portion by comparing the degree of change in the electric signal generated when the thick yarn portion or the thin yarn portion due to the slab included in the traveling yarn passes with the set value. In this embodiment, in addition to the first set value for detecting the slab in the clearer (10), an extremely large signal change such as sluffing is detected. The second set value for this is set in advance. Therefore, when the yarn clearer (10) detects a signal change exceeding the second set value, that is, a voltage change, the sluffing detection signal (21) is input to the control circuit (19), Control the inverter (18). That is, in FIG. 2, after the yarn is cut due to the occurrence of sluffing (D) and after the yarn splicing operation time (E) elapses,
The winding is restarted, but at this time, the winding speed is set to a speed (u1) smaller than the initial value (V) and the winding is performed (F). The speed difference (V-u1) is the initial value (V)
Approximately 30% is suitable, but it can be changed as appropriate depending on the type of thread to be processed, the initial value (V) 'thread thickness to be set, etc. It is preferable to be adjustable.

Further, in FIG. 2, assuming that sluffing occurs again (G) during winding at the yarn speed (u1), the winding speed after the yarn splicing operation (H) is the set speed (u1). Yes (I).

FIG. 3 shows another embodiment. That is, the winding is started at the yarn speed of the initial value (V), the yarn is broken due to the occurrence of sluffing (J), and the winding speed after the yarn splicing is controlled by the inverter so as to be u1 as in the above embodiment. , If the slapping occurs again (L) during winding at the yarn speed (u1) (L), the winding yarn speed after the yarn splicing operation is u2, which is smaller than u1.
(M). That is, in the second embodiment, every time slashing occurs, the take-up yarn speed after splicing is set to a value smaller than the yarn speed before the occurrence of slacking.

As described above, when the winding speed is lower than the initial winding speed, the sluffing that occurs at the yarn speed (V) is less likely to occur at the yarn speed (u1), and the sloughing occurs at the yarn speed (u1). Ruffing is less likely to occur at yarn speed (u2).

The yarn speed control is performed for one spinning bobbin, and the yarn speed is not set to the original set value (V) every time a new spinning bobbin is supplied to the winding position. Of course.

Further, in FIGS. 2 and 3, the yarn speed change points (N) (P)
Is a point at which the amount of yarn in one spinning bobbin decreases and the tension starts to increase. It is effective to reduce the yarn speed from the tension increase start point to prevent wasteful yarn breakage.

〔The invention's effect〕

As described above, in the present invention, the winding speed after the occurrence of sluffing is set to a speed smaller than the initial value, so that the sluffing does not occur many times, which is particularly effective in a high-speed winder. . That is, it is possible to prevent unnecessary yarn breakage other than yarn breakage due to yarn defects such as slabs.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an example of a winding unit for carrying out the method of the present invention, FIG. 2 is a velocity diagram showing a first embodiment of the method of the present invention, and FIG. FIG. 3 is a velocity diagram showing the example of FIG. (V) …… Initial yarn speed (u1) (u2) …… Yarn speed after occurrence of sluffing (D). (G). (J). (L) …… Sluffing point

Claims (1)

[Claims] 1. An automatic winder for winding a package of a predetermined yarn amount and shape while removing a slab contained in a yarn of a spinning bobbin, and a yarn cutting occurs during winding of one spinning bobbin. At this time, it is determined whether the thread breaks due to slabs or due to sluffing, and in the case of thread breaks due to sluffing, the winding speed after splicing the thread is at least the initial winding speed of the bobbin during winding. A winding method in an automatic winder characterized by setting a lower speed and winding.