JPH0494376A - Winding for package - Google Patents

Abstract

PURPOSE:To prevent generation of out-of-edge and form a package with prescribed winding density by carrying out winding so that the edge angle of a winding end may become 1/2-1/4 time as large as the edge angle of a winding start. CONSTITUTION:In forming a package 11 to supply to a double twister and so forth, winding is carried out so that the edge angle theta5 of the winding end of the package 11 may become 1/2-1/4 time as large as the edge angle theta4 of a winding start. The package 11 to be wound is supported rotatably through a supporting shaft 17 arranged at its axial center to wind string by the rotation of a friction roller 2. A slit plate 18 whose periphery is cut into a radial shape is installed on the end of the supporting shaft 17, and a rotation detector 19 is installed at a close position which faces it. The rotation detector 19 is wired to the controller 20 of a driving motor in a traverse cam 4 to input the data of rotational speed Rp of the package 1 to be wound.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for winding a package of spun yarn.

[Prior Art] Generally, all winders in a yarn doubling machine or the like wind the yarn while appropriately traversing the yarn.

As shown in FIG. 7, this type of winding mechanism includes a friction roller 2 for contacting and rotating a winding package 1, and a traverse cam 4 having a cam arm 3 on its surface.
The traverse skite 5 that guides the thread Y is configured with 113, the yarn Y from the yarn supply package 6 is wound up via the balloon guide 7, balance 8, etc., and a predetermined winding package 1 is formed.

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

As shown in FIGS. 8 and 9, 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 R1 of the winding package 1.
) is gradually decreased at the same rate and in synchronization with the decrease. This method has the advantage that the winding weight can be increased, ribbon winding occurs, and the unwinding property is excellent. This is a method of winding the winding package 1 while keeping it constant, and traversing the winding package 1 while keeping the rotational speed Rt of the traverse cam 4 constant regardless of changes in the rotational speed Rp of the winding package 1. It has the advantage that it is stable, has a constant density, and has a simple and inexpensive mechanism.

[Problem to be Solved by the Invention 1] However, each of the above conventional winding methods has its own problems.

That is, in precision winding, the winding number W is constant, but the winding angle θ gradually becomes smaller as the winding diameter Φ increases. Even if 1 is selected, it is unavoidable that the winding angle θ1 becomes large in the small diameter portion (see FIG. 8) and the winding angle θ2 becomes small in the large diameter portion (see FIG. 9). For this reason, the twill misalignment (twill drop) at the large diameter part
At the same time, the winding width is reduced in the small diameter section, resulting in sharp winding, which has a great impact on the subsequent process6.Furthermore, in random winding, the winding angle θ is kept constant. As a result, the number of winds W in the large diameter portion decreases,
A predetermined winding density cannot be obtained, resulting in the winding package 1 having a small winding weight. 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 for double twisters, so a package with a high winding density has been required.

In view of the above-mentioned circumstances, the present invention was devised to provide a method for winding a package in which the twill is smooth and the winding density can be increased.

[Means and effects for solving the problems] In the present invention, winding is performed so that the winding angle at the end of winding is 172 to 1/4 of the winding angle at the beginning of winding.

By starting the winding at an appropriate helix angle and wind number using the above method, the winding density can be increased and a wound package can be formed without helix misalignment even in the large diameter portion.

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

FIGS. 1 and 2 show an embodiment of a method for winding up a package according to the present invention.

When forming a package 11 to be supplied to a double twister or the like, the present invention is designed so that the winding angle θ at the end of winding of the package 11 is 1/2 to 1/4 of the winding angle θ4 at the beginning of winding. It is something to be rolled up. That is, these winding angles θ4. The relationship of θ5 is expressed by the following equation.

θ, -k・θ, , 1/2 > k > 1/4...■ And preferably, k41/3 is wound 6, and even more preferably, θ is >5° It is rolled up like this. These more specific numbers are
This was experimentally determined to be able to completely maintain the stability of the package 11 without the risk of the twill slipping.

Therefore, the bobbin diameter is 40In, and the R large winding diameter is 2001Im.
In the winding package 11, the winding angle θ at the beginning of winding is
If 4 is 18 degrees, then the winding angle θ at the end of winding is 6 degrees, and if θ is 15 degrees, then θ is 5 degrees.

Such control of the winding angle θ is realized by appropriately changing the wind number W related to the winding angle θ, that is, the rotation speed Rt of the traverse cam.

That is, as shown in FIG. 3, the rotational speed Rt of the traverse cam
By decreasing monotonically as the rotational speed Rtl of the winding package decreases, the winding angle decreases as shown in FIG. 1. The degree of gradual decrease in the rotational speed Rt at this time (the slope of the straight line Q in FIG. 3) may be made gentler than the degree of gradual decrease in the precision winding (double-dashed line), which is also shown for comparison in the figure.

Therefore, the degree of gradual decrease A (-slope) of the rotation speed R1 of the present invention is expressed by the following equation.

al>IAI>O---■ Here a; Gradual decrease degree of precision winding (#!ki) And this means that as the winding diameter Φ increases, in terms of the number of winds W, as shown in Figure 4. In contrast to the conventional precision winding which is constant and the random winding which greatly decreases, the wind number W of the present invention does not decrease rapidly in the random winding and is within the range where a predetermined helix angle can be achieved at the end of winding (for example, W = 2.0 wind or more).

Next, a specific example of controlling the traverse cam rotation speed Rt is as follows.
Shown in Table 1.

Here, Φ=50m+, which is the small diameter part at the beginning of winding.

Rp = 5000rl) Rt = 500O8 at TI
/m, large diameter part Φ = 250, Ro = 1000
At the time of rpn, Rt=30005In, and during that time, -
The number of steps decreases monotonically.

Table 1 By controlling the traverse cam rotation speed R1 in this manner, the winding angle θ4. It can be wound up as θ.

In addition, as shown in FIGS. 3 and 4, the rotational speed of the traverse cam may be finely and periodically varied (disturbed) around the basic control line Q to prevent ribbon winding. is desirable.

As described above, the traverse cam is adjusted so that the winding angle θ5 at the end of winding is 1/2 to 1/4 of the winding angle θ4 at the beginning of winding, especially θ, = 1/3θ4 and θ5>5°. Rotation speed R
t is monotonically decreased as the rotational speed R1) of the winding package 11 decreases, and the degree of gradual decrease is made gentler than the degree of gradual decrease in precision winding, so it is possible to prevent misalignment of the twill at the large diameter portion and poor unwinding performance. This prevents the occurrence of sharp winding in the small diameter portion, and allows the package to be formed with a desired high density.

In other words, it can be made ideal as a yarn feeding package for a double twister.

Next, an apparatus for carrying out the above method will be explained with reference to FIGS. 5 and 6. 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 113, and a drive motor 14, 15 for rotationally driving the belt 12 and 13 is connected to each of the traverse cams 4 and 4. Further, the winding package 11 is rotatably supported by a cradle 16 via a support shaft 17 provided at its axis, and the rotation of the friction roller 2 causes the yarn (
In the illustration, it is designed to be rolled up.

A slit plate 18 having a radially cut out peripheral 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 thereof. The rotation detector 19 is connected to the controller 20 of the drive motor 15 of the traverse cam 4, and detects the rotation speed R of the winding package 1.
The user is prompted to input information on p.

The controller 20 is configured to calculate the rotational speed Rt of the traverse cam 4 based on the detected rotational speed RD, and calculates the rotational speed Rt of the traverse cam 4 so that the rotational speed of the traverse cam 4 decreases as shown in Table 1. , the drive motor 15 is connected to 118
It is supposed to be done.

Further, this controller 20 is configured to disturb the rotation of the traverse cam 4 as appropriate, as shown in FIGS. 3 and 4, 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. .

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

The twill angle at the end of winding is 1/2 to 1/4 of the twill angle at the beginning of winding.
Since it is wound up so that the twill misalignment can be prevented from occurring, it is also possible to form a package with a predetermined winding density.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the relationship between the winding diameter and winding angle, showing an example of the package winding method according to the present invention, Fig. 2 is a side view of the wound package, and Fig. 3 is the package rotation speed. FIG. 4 is a diagram showing the relationship between the winding diameter and the number of winds. FIG. 5 is a front view showing an embodiment of the winding device for carrying out the present invention. Fig. 6 is a sectional view taken along the line Vl-Vl in Fig. 5, Fig. 7 is a perspective view showing a conventional winding device, and Figs. 8 and 9 are precision winding, which is a conventional winding method. FIGS. 10 and 11 are side views of a winding package for explaining random winding, which is another conventional winding method. In the figure, θ is the winding angle. Patent Applicant Murata Machinery Co., Ltd. Agent Patent Attorney Nobuo Kinutani (1 other person) Figure 3 Figure 2 Figure 5 Figure 6

Claims (1)

[Claims] 1. The twill angle at the end of winding is 1/2 to 1 of the twill angle at the beginning of winding.
A method for winding a package, characterized by winding the package so that the winding ratio is 4.