JPH03115060A - Rewinding method of package - Google Patents

Abstract

PURPOSE:To prevent generation of cob-webbing and kick-winding or the like with a suitable wind number and traverse angle set despite package winding size by reducing a rotary speed of a traverse can from a winding start to a winding end slower than the gradual reduction degree of the rotary speed of rewinding at a fixed wind number. CONSTITUTION:A slit plate 18, whose peripheral part is radially cut, is mounted to the end part of a supporting shaft 17, and a rotary speed detector 19 is provided in a position of approximately appearing in this slit plate 18. This rotary speed detector 19 is wire-connected to a controller 20 of a drive motor 15 for a traverse cam 4 so as to input information of a rotary speed Rp of a rewinding package 11. This controller 20 is formed so as to calculate a rotary speed Rt of the traverse cam 4 being based on the detected rotary speed Rp, and the rotary speed Rt of the traverse cam 4 is suitably reduced in accordance with an increase of a winding diameter phi of the rewinding package 11.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method for winding a package of spun yarn.

[Prior Art] A winding device such as a gold thread machine winds a thread while appropriately traversing the thread.

As shown in FIG. 6, a conventional winding device of this type includes a friction roller 2 for contacting and rotating a winding package 1, and a traverse cam 4 having a cam groove 3 on its surface. By relatively moving the traverse guide 5 that guides the yarn Y along the cam groove 3, the yarn Y from the yarn supply package 6 is wound in a predetermined manner through the balloon guide 7, balance wheel 8, etc. It is designed to be rolled up as package 1.

There are two methods for winding yarn using such a winding device: precision winding and random winding.

As shown in FIGS. 7 and 8, precision winding is a method of winding with a constant wind number W, and the rotation speed Rt of the traverse cam 4 is set to the rotation speed Rp of the winding package 1.
It is designed to gradually decrease at the same rate and in synchronization.

As shown in FIGS. 9 and 10, random winding is a method of winding with a constant winding angle θ, and the traverse cam 4
Traverse is performed while keeping the rotational speed Rt of the winding package 1 constant, regardless of changes in the rotational speed REI of the winding package 1.

[Problems to be Solved by the Invention] By the way, each of the conventional winding methods described above has its own sections.

That is, in precision winding, since the number of winds W is constant, the winding angle θ gradually becomes smaller as the winding diameter Φ increases. Even if this was selected, it was inevitable that the winding angle θ1 would be large in the small diameter portion (FIG. 7) and the winding angle θ would be small in the large diameter portion (FIG. 8).

This licking causes misalignment of the twill at the large diameter section and poor unwinding performance, and the narrowing of the winding width at the small diameter section causes uneven winding, which has a large impact on subsequent processes. Ta.

In addition, in random winding, by keeping the winding angle θ constant, the number of winds W decreases in the large diameter portion, so a predetermined winding density cannot be obtained, resulting in a wound package 1 with a low density. In particular, in the case of a gold thread machine that forms yarn feeding packages for double twisters, there is a limit to the capacity of yarn feeding packages in double twisters, so packages with high density have been required.

In view of the above circumstances, the present invention has been devised in order to provide a method for winding a package that allows the winding number and winding angle to be appropriate regardless of the large diameter portion or the small diameter portion.

[Means and effects for solving the problem] The present invention provides the following features:
The number of rotations is decreased more gradually than the degree of gradual decrease in the number of rotations when winding at a constant number of winds.

By starting winding at an appropriate winding angle and winding number using the above method, the desired winding number and winding angle can be achieved even in the large diameter portion.

[Example] Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 and 2 show an embodiment of the package winding method according to the present invention, and for comparison, there are conventional precision winding methods (shown by the two-dot chain line in the figure) and random winding methods ( - dotted chain line) are also shown.

In this winding method, as shown by the solid line in the figure, the rotation speed Rt of the traverse cam 4 is changed to the rotation speed Rt of the winding package 1.
It is characterized in that it monotonically decreases as D decreases, and the degree of gradual decrease (the slope of the straight line Q in FIG. 2) is lower than that of precision winding.

That is, the degree of gradual decrease A (=inclination) of the rotation speed R1 of the present invention is expressed by the following equation.

at>IAI>O・-■ Here a: Gradual decrease degree (slope) of precision winding.In terms of wind number W, as shown in Fig. 1, as the winding diameter Φ increases, While conventional precision winding is constant and random winding significantly decreases, the wind number W of the present invention is within a permissible range (for example, W= 2.
(0 wind or more).

In this example, as the rotation speed Rt, as shown in Table 1, Φ = 50 which is the small diameter part at the beginning of winding, RD
When =5000rp, Rt =800rpn+,
Large diameter part Φ”250 tsm, RD = 1000r
At the time of pH, Rt=400 rpm. During that period, the number is monotonically decreased in terms of the -order number.

Table 1 By adjusting the rotation speed Rt in this way, in the winding package 11 that is formed, as shown in FIG. Then, in the large diameter portion, the angle θ is 8 degrees, which is enough to prevent deviation or poor unwinding properties. That is, when compared with the winding angle θ obtained by the conventional method, the following relationship is obtained.

θ, θ, ≦θ3 ... Small diameter part θ2 <θ, θ, ... Large diameter part here θ1; Edge angle of precision winding (small diameter part) θ2;
The winding angle of precision winding (large diameter part) θ; The winding angle of random winding θ; The winding angle of the present invention (small diameter part) θ: The winding angle of the present invention (large diameter part) As shown in FIGS. 1 and 2, the rotational speed of the traverse cam 4 is finely and periodically varied (disturbed) around the basic control line Q to prevent ribbon winding. It has become.

In this way, the number of rotations Rt of the traverse cam 4 from the start of winding to the end of winding is reduced more slowly than in precision winding. can be made smaller, and the edge angle can be made larger than precision winding even in large diameter parts.
The number of winds W can be made larger than that of random winding.

Therefore, it is possible to prevent misalignment of the twill and poor unwinding properties in the large diameter portion, and also to prevent the occurrence of sharp winding in the small diameter portion. In addition, by setting the desired number of winds (winding density), the package to be supplied to the double twister can be formed with the desired high density.
It can contribute to improving the efficiency of the gold thread process.

Next, an apparatus for carrying out the above method will be explained with reference to FIGS. 4 and 5. In the figure, the same components as the conventional ones are denoted by the same reference numerals, and the explanation thereof will be omitted.

This winding device, like the conventional one, includes a friction roller 2 and a cam? The traverse cam 4 has a traverse cam II3, and drive motors 14 and 15 for rotational driving are connected to each of the cams 14 and 4 via a belt 1213.

Further, the winding package 11 is moved by the cradle 16.
It is rotatably supported via a support shaft 17 provided at its axis, and the thread (as shown) is wound up by the rotation of the friction roller 2.

A slit plate 18 with a radially cut out circumferential portion is attached to the end of the support shaft 17, and a rotation detector 19 is provided at a position facing the slit plate 18 in the vicinity of the slit plate 18. , is connected to the controller 20 of the drive motor 15 of the traverse cam 4, and is connected to the controller 20 of the drive motor 15 of the traverse cam 4.
The user is prompted to input the information of D.

The controller 20 is configured to calculate the rotation speed Rt of the traverse cam 4 based on the detected rotation speed R1), and the rotation of the traverse cam 4 decreases as shown in Table 1. The drive motor 15 is controlled in this way.

Manako's controller 20 is designed to disturb the rotation of the traverse cam 4 as shown in FIGS. 1 and 2 at the same time as the rotation of the traverse cam 4 decreases.

With this configuration, the rotational speed Rt of the traverse cam 4 can be appropriately reduced in accordance with the increase in the winding diameter Φ of the winding package 11, and the above embodiments of the present invention can be reliably carried out. .

In this example, the rotation speed Rt was monotonically decreased as shown in Table 1, but the degree of gradual decrease may be any value as long as it does not satisfy the formula 0, and the desired wind speed can be achieved. The control content may be selected so that the number W (trailing angle θ) is obtained.

[Effects of the Invention] In summary, according to the present invention, the following excellent effects are achieved.

Since the number of rotations of the traverse cam from the start of winding to the end of winding is reduced more gradually than the degree of gradual decrease in the number of rotations for winding at a constant number of winds, an appropriate number of winds and twill can be achieved regardless of the size of the package winding diameter. It is possible to form a package with a predetermined winding density, while preventing the occurrence of steep deviations and uneven windings.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the relationship between the winding diameter and the number of winds, showing an example of the package winding method according to the present invention, FIG. 2 is a diagram showing the relationship between the package rotation speed and the traverse cam rotation speed, and FIG. The figure is a side view of a winding package formed according to the present invention, and FIG.
5 is a sectional view taken along the line V-V in FIG. 4, FIG. 6 is a perspective view showing the conventional winding device, and FIGS. 7 and 8 are the conventional winding devices. FIGS. 9 and 10 are side views of a winding package for explaining precision winding, which is a winding method of It is. In the figure, 4 is a traverse cam.

Claims (1)

[Claims] 1. A package winding method characterized in that the number of revolutions of a traverse cam from the start of winding to the end of winding is reduced more gradually than the degree of gradual decrease in the number of revolutions when winding at a constant number of winds.