JPH01294173A - Winding of thread - Google Patents

Abstract

PURPOSE:To eliminate the cause of thread breakage by forming a thread layer with the specified traverse width from the winding start time so that a portion with a large winding diameter is not generated when winding the thread layer on a new bobbin in a takeup winder. CONSTITUTION:The preset quantity of a thread is wound on a bobbin on a bobbin holder set at the winding position, the fully wound time (full package time T) is determined in advance. The drive of a traverse cam is stopped and the bobbin is rotated by inertia at the preset time T1 before the full package time T. The drive of a package is stopped at the full package time T, a new bobbin holder fitted with a vacant bobbin is exchanged with the fully wound bobbin holder, the new bobbin holder fitted with the vacant bobbin is located at the winding position, and winding is started. The drive of the bobbin holder fitted with the vacant bobbin is started after the revolving time T2 elapses, the drive of the traverse drum of the vacant bobbin is started when T3 elapses after the rotation of the fully wound bobbin is stopped.

Description

[Detailed description of the invention] [Industrial application field]

TECHNICAL FIELD The present invention relates to a method for winding yarn, particularly a method for winding yarn in a tick-up twin gear.

[Conventional technology]

When the spun yarn is wound up by the pick-up device, the yarn end is wound around the bobbin 2 inserted into the bobbin holder 1, but the tail portion 4 fitted into the groove of the bobbin 2 remains in a predetermined position. However, since the surface of the bobbin 2 is smooth and slippery, the initial thread waste at the beginning of winding onto the empty bobbin 2 will slip when the traverse guide 5 is reversed at the end of the bobbin, causing ribbon winding and the The traverse width tends to be shorter than the traverse width, and the slipping yarn increases the winding density in the winding radial direction, and when it comes into contact with the friction roller 6, this part receives a driving force, and the contact pressure is different from other parts. In addition, vibrations caused by vibrations of the friction roller, bobbin holder, etc. may cause changes in the physical properties of the yarn in that area, resulting in streaks and the like in subsequent processes. When the above-mentioned yarn is drawn and twisted, the twist propagation is inhibited in the yarn where the physical properties have changed, and a kind of discontinuous part of twist density occurs, and the length of the yarn is 50M to 30M. As a result, dyeing spots occur in this area, the dyeing is darker than in the normally processed area, and the fineness is also thicker than in the normal yarn. It has become clear that these streaks appear periodically and coincide with the traverse period. The above-mentioned portion where the physical properties have changed appears about 10 seconds after the bobbin is replaced and winding is started.

[Problem to be solved by the invention]

In view of the above points, the method of the present invention is implemented after replacing the bobbin. When newly forming yarn waste on a new bobbin at the winding position, form a yarn layer on the new bobbin with a specified traverse width from the beginning of winding, and make sure that the winding density is high or the part with a large winding diameter is The purpose of this invention is to obtain a method for winding yarn that does not cause this problem.

[Means to try to solve the problem]

A bobbin mounted on at least two bobbin holders supported so as to be alternately displaced to a winding position is rotated onto the bobbin holder by a bobbin drive HIIW, and a traverse cam guides the traversed thread to the rotating bobbin. When winding a yarn layer onto a bobbin to form a package, the drive of the traverse cam is stopped at a predetermined time before the package becomes a full package, and the traverse cam is rotated by inertia. (The drive system for the new bobbin was stopped, and the traverse cam was rotated by inertia.) The full package was moved away from the winding position, the new bobbin was positioned at the winding position, and the bobbin drive system of the new bobbin was driven to feed the thread to the new bobbin. After a predetermined period of time has elapsed, the traverse cam, which had been rotating due to inertia until then, is driven to increase its rotation to steady rotation. K Example] An example of implementing the method of the present invention will be described below. A plurality of bobbin holders are prepared, and one of the bobbin holders winds the thread around the plural bobbins inserted in each bobbin holder at the thread winding position, and when it is fully wound, the bobbin holder with an empty bobbin inserted and the full The thread winding method of the present invention is based on the thread winding method of exchanging the position with the winding bobbin holder and winding a new thread around the empty bobbin. A predetermined width of thread is wound around the bobbin on the bobbin holder set in the unwinding position, but since the full winding point can be known in advance, the time at which the winding becomes full (full package time) can be known in advance. are doing. Therefore, before the predetermined time t1 of the full winding time, the driving of the traverse cam is stopped and the traverse cam is rotated by inertia. As a result, the rotation of the traverse cam gradually decreases. This state is shown in FIG. Then, when the full package time T is reached, the package drive is stopped, the position of the new bobbin holder with the empty bobbin inserted and the full bobbin holder is changed, and the new bobbin holder with the empty bobbin inserted is placed at the winding position. and start winding. After this revolving time t2 has elapsed, the bobbin holder into which the empty bobbin has been inserted is started to be driven, and after an appropriate time t3 has elapsed after the full bobbin rotation has stopped, the driving of the traverse drum for the empty bobbin is started. When the traverse speed is high, the winding angle θ becomes large, and when the traverse speed is low, the winding angle θ' becomes small, as shown in FIG. Therefore, if you slow down the rotation of the traverse cam for an appropriate time when you start winding the thread around the new bobbin, which makes it easy to see the occurrence of deterioration in the thread, in fact, for about 10 seconds, the initial traverse width can be adjusted to the new bobbin. Even if thread waste is formed and the rotation of the traverse cam is subsequently increased, since a thread layer has already been formed on the bobbin, the thread will not slip on the bobbin surface and the winding width will become narrower, and the initial traverse width will remain unchanged. You can wrap it with . Effects of the Invention 1 The method of the present invention is such that a bobbin mounted on at least two bobbin holders supported so as to be able to be alternately displaced to a winding position is rotated onto the bobbin holder by a bobbin drive device, and is traversed by a traverse cam. When forming a package by guiding yarn to a rotating bobbin and winding waste yarn on the bobbin, the drive of the traverse cam is stopped at a predetermined time before the package becomes a full package, and the traverse cam is rotated by inertia. When it is full,
Driving the full bobbin (while the traverse cam is rotating inertia), move the full package from the winding position, position the new bobbin at the winding position, drive the bobbin drive device of the new bobbin, and start the new bobbin. The winding of thread onto the bobbin is started, and after a predetermined period of time has elapsed, the traverse cam, which had been rotating inertia until then, is driven and the rotation is increased to steady rotation, so when winding thread around the empty bobbin for the first time, The angle at which the thread wraps around the empty bobbin is reduced, there is no slippage on the bobbin in the direction that reduces the traverse width, there is no swelling of the thread layer at the end of the traverse, and there is no pressure contact by the friction roller. Also, there is no change in the quality of the thread in the raised part of the thread waste. In addition, the yarn removed from the traverse guide at the beginning of winding is picked up by the traverse guide and transferred to normal traverse when transitioning from tail wind to normal wind, but all the filaments do not enter the traverse guide at once, and some The filament may separate and become naturally wound, causing yarn breakage, but the traverse guide picks up the yarn well because the traverse speed is not high at the beginning of winding, which is the most frequent occurrence. This will not cause thread breakage as described above.

[Brief explanation of the drawing]

FIG. 1 is a graph showing the relationship between the number of revolutions of a traverse cam and time, and FIG. 2 is a plan view showing a state in which yarn is wound around a package at different traverse angles. FIG. 3 is a schematic side view of the tick-up wine goo. tl...Time from when the traverse cam starts inertial rotation until it stops winding the package t2...Time for replacing a full bobbin with an empty bobbin (revolving time) t3... New bobbin Time from starting winding to driving the traverse cam 1...Bobbin holder, 2-°°Pobbin 5.
...Traverse cam. 6...Friction roller

Claims (1)

[Claims] 1. A bobbin drive device rotates a bobbin attached to at least two bobbin holders supported so that it can be alternately displaced to a winding position onto the bobbin holder, and a traverse cam guides the traversed thread to the rotating bobbin. When winding thread waste on the bobbin to form a package, the drive of the traverse cam is stopped at a predetermined time before the package becomes a full package, and the traverse cam is rotated by inertia. The driving of the winding bobbin driving device is stopped, and the traverse cam, while rotating inertia, removes the fully wound package from the winding position, positions the new bobbin in the winding position, and drives the bobbin driving device of the new bobbin to load the new bobbin. A method for winding a thread, which comprises starting winding of the thread, and after a predetermined period of time has elapsed, drives a traverse cam, which had been rotating inertia until then, to increase the rotation to steady rotation.