JPS5851532B2 - Method for manufacturing bulky processed yarn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing bulky processed yarn using a 4-axis external friction temporary twisting device, in which the characteristics of the friction disk are changed for each unit so that the temporary twisting conditions can be substantially changed. The present invention provides a method for manufacturing a special bulky yarn by doubling one of the two yarns obtained by this temporary twisting device.

It is known, for example, from Japanese Patent Publication No. 49-8825, to obtain a textured yarn with a good texture or a textured yarn with a unique texture by doubling two yarns with different textured yarn characteristics.

However, in the above-mentioned conventional technology, processed yarns having different characteristics are produced independently and then combined, which causes a problem of poor productivity.

On the other hand, as shown in Japanese Patent Publication No. 49-1267, a temporary twisting technique is also known in which two threads are processed with one spindle. 2 units) must be installed, which complicates the equipment.

For this reason, an increase in the floor area of the apparatus, an increase in equipment costs, and a complicated operation are unavoidable, causing an increase in costs.

The present inventors completed a four-axis external friction temporary twisting device as a result of studies to fundamentally eliminate the drawbacks of the prior art, and the present invention makes use of this.

The structure and effects of the present invention will be clarified by examples, but the gist thereof is as follows.

(1) One unit of 4-axis circumscribed friction temporary twisting device with four axes capable of temporarily twisting two yarns simultaneously and independently.(2) Arrangement with different friction disk characteristics for each unit. 3) Of the two yarns processed by the friction temporary twisting device of one unit, one yarn is each combined with one yarn of the adjacent unit. 4) If necessary, a single yarn is added to the combined yarn. It is characterized in that it is subjected to entanglement treatment and/or heat treatment, etc., and (5) is wound up as a special bulky processed yarn of substantially 1 yarn per unit.

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

FIG. 1 is a side view showing the main measuring part of a novel four-axis circumscribed friction disk type temporary twisting device used in the present invention, and FIG. 2 is a plan view of the same.

Rotatably supported shafts 1, 2, 3, 4 are arranged at each vertex of a quadrilateral shape, each of which has a friction disk A, B, C, D.
For example, if A is at the top, friction disks B, C, and D are provided at lower positions in order.

When the four friction discs are arranged as described above, the shaft 1
A friction disk A1 is provided on the shaft 2, a friction disk B1 is provided on the shaft 2, and likewise friction disks C1, Dl are provided on the shaft 2.

Of the friction disks, friction disks A and C (A1 and C1) on the diagonal of the quadrilateral formed by the four axes overlap, and friction disks B and D (B1) on another diagonal overlap. and Dl
) do not overlap, and a set of four friction disks are driven in the same direction as shown by the arrows.

The device in which friction disks are attached to the four axes constitutes one unit.

Yarn Y1 has friction disks A, B, C (and A1゜B1.C
1), and similarly, the thread Y2 is applied to the friction disks C2D, A (and C1, Dl).

It is designed to be added by contacting A1).

In the embodiment shown in FIGS. 1 and 2, each friction disk is rotated counterclockwise, and each friction disk provided on shafts 1, 2, 3, and 4 is sequentially lowered in position in the counterclockwise direction. It is installed like this.

FIG. 3 is a plan view showing another aspect of FIG. 2. When each friction disk is driven in clockwise rotation, for example, assuming that friction disk A is at the highest position, D.

C and B are configured so that the position decreases clockwise with respect to the plane of the paper.

In Fig. 1, yarn Y1 first contacts friction disk A, then contacts B and C, and again A1 below A...
The friction discs contact each other in this order, undergo frictional twisting, and are subjected to tension in two directions.

The yarn Y2 also contacts the friction disks A, C, D and Ao, C1, Dl, which are a set of three, and receives tension in two directions.

FIG. 3 is an example of the addition in the S direction, and the rotational direction of the friction disk and the order of contact of the yarns with this friction disk are reversed from those in FIG. 1, and the yarn Y2 is The threads Y1 are in contact with disks A and C2D.

Contact B.

The material constituting the contact surface of the friction disk is preferably rubber-based (such as urethane rubber) or non-rubber-based (such as ceramic).

Next, a method for manufacturing a bulky yarn incorporating the temporary twisting device will be explained with reference to the drawings.

FIG. 4 is a schematic diagram of a manufacturing process of bulky textured yarn showing one embodiment of the present invention.

In FIG. 4, the threads pulled out from the thread package 11 are guided by a guide 20, and a set of two threads is fed from the delivery rollers 12, 12'.

The yarn is subjected to a temporary twisting process by a four-axis external friction temporary twisting device 14, 14', and the twist is fixed by a heat treatment device 13, 13' for fixing the twist.

The four-axis circumscribed plate twisting devices 14 and 14' are constructed as described later in order to produce processed yarns having different processed yarn characteristics alternately for each unit.

The yarns 16 and 17 obtained by the temporary twisting device 14 are combined with adjacent processed yarns having different processed yarn characteristics.

For example, yarn 17 is one of the adjacent units, yarn 1.
Similarly, yarn 16 is combined with the yarn of the left unit (not shown), and yarn 19 is combined with the yarn of the right unit (not shown).

Thereafter, the yarn is converged by a single yarn entangling device 21 as required, and then wound by a winding device 22.

Note that 15 and 15' are take-up rollers. An important feature of the present invention is to change the characteristics of the friction disk of the 4-axis circumscribed friction twisting device incorporated into a series of devices as described above, and specific means for this are, for example. It is as follows.

(1) Change the number of friction disks (for example, device 14 has 9 disks, device 14' has 6 disks) (2) Change the diameter of the friction disks (for example, device 14 has 50 m
+11φ and device 14' is 4Qgφ) (3) Change the thickness of the friction disk (for example, device 14 has a thickness of 7 mm and device 14' has 4 holes) (4) Between friction disks on the same axis (For example, the device 14 has a friction disk distance of 1.Qill, and the device 14' has a distance of Qill.)
, 51m) (5) Change the distance between the four axes (for example, for device 14, the distance between the axes is 4011111L, and for device 14', the distance is 35m) (
6) Change the material of the friction disc.

(For example, the device 14 is made of rubber, and the device 14' is made of ceramic.) Either one or more of the conditions (1) to (6) exemplified above may be selected; if this is done, (1) )-(5), device 14 is better than device 14.
' You can insert more twists.

There are four methods for combining and doubling yarns when a large number of temporary twisting device units are arranged adjacent to each other, for example, as shown in FIG. 5, and any of these methods can be adopted. Practically speaking, it is preferable to adopt method 1, which provides the simplest thread path.

It is preferable that the two yarns are substantially integrated into one after the yarn is combined, and in order to improve the bundling property of the two yarns, the yarn after the yarn is combined by a fiber gathering means such as an air jet nozzle. It is preferable to use a single yarn entangling device to provide entanglement between the single yarns.

Examples of the scope of application or applicability of the present invention include the following.

(1) Applicable to thermoplastic synthetic fibers in general.

Polyester type, polyolefin type, polyamide type, polyacrylic type and copolymer based on these, yarns with added third component, etc. (2) Temporary twisting methods include: (a) Temporary twisting of drawn yarn (b) Undrawn yarn or The briori-oriented yarn (highly oriented undrawn yarn: POY) is temporarily twisted subsequent to or simultaneously with the drawing.

(3) Four-axis circumscribed friction plate twisting devices with different friction disks are arranged so as to obtain S twist and 2 twist, respectively, to produce processed yarns with different crimp characteristics for S twist and 2 twist. You can also combine the S twist and the 2nd twist.

In this case, a special doubled yarn with no torque can be obtained.

(4) The processed yarn after doubling may be heat-treated to suppress stretchability.

The single yarn entanglement treatment and heat treatment in 4) above may be performed alone or both, and the order of these treatments is not particularly limited.

(5) Because the temporary twisting process is performed using a 4-axis external friction temporary twisting device, it is possible to process at high speed, and it is possible to process at 300m/300m/
Stable processing can be performed at high speeds of m or more.

(6) The characteristics of the temporarily twisted yarn will change significantly due to changes in the yarn feeding speed and tension fluctuations, but if this method is used in conjunction with the present invention, a bulky yarn with even more special appearance and characteristics can be obtained. It will be done.

(7) According to many experiments by the present inventors, when performing temporary twisting using a 4-axis external friction temporary twisting device, the yarn fineness (D) and the number of filaments (T) It is preferable that the following conditions be satisfied between

D≧100 F≧30 It has been confirmed that the occurrence of fuzz can be significantly reduced by performing temporary twisting within a range that satisfies the above conditions.

The present invention utilizes a four-axis external friction temporary twisting device and is configured to change the conditions of the temporary twisting means, that is, the friction disk, so that it has the following effects.

(1) Since a compact frictional twisting device is used, there is no need to increase the distance between the weights of the device, and equipment costs are low.

(2) Since it is possible to substantially process one yarn in one unit after yarn doubling, productivity is twice as high as that of conventional yarn doubling methods, and efficiency is significantly improved and costs can be reduced.

(3) By simply changing the configuration of the 4-axis temporary twisting device, processing conditions (e.g., stretching ratio, friction body rotation speed, processing speed, etc.)
) are the same, and processed yarns with special crimp properties can be obtained from the same type of feed system.

Furthermore, since the temporary twisting device has a simple configuration, it is easy to manufacture, maintain, and maintain the device.

(4) In particular, in the present invention, processing conditions can be varied simply by changing the conditions of the friction disk, so bulky processed yarns with a variety of variations can be obtained, such as the following.

(b) Highly bulky temporarily twisted yarn with mixed crimped state (→ Specially processed yarn with fluff and strength of processed yarn comparable to filament ←) with strong discontinuous convergence. The above-mentioned bulky processed yarn is obtained by alternately varying the characteristics of the four-axis circumscribed friction temporary twisting device incorporated in the series of devices shown in FIG. 4 for each unit.

The means and effects are as described above, but for example, even if the rotational speed of the friction disks is the same, this phenomenon occurs because the surface speeds and surface frictional forces are different from each other, and the surface speed and Depending on the absolute value of the surface friction force, the three types of special bulky textured yarns mentioned above can be obtained as desired.

When temporarily twisting a large number of units side by side, for example, in the case of method 1 in Fig. 5, one yarn out of each two yarns processed by the leftmost and rightmost units is a doubling yarn. There is no other yarn to be used, and the relationship between the number of units N and the winding device n is n=N-1, but in this case, the requirement is that it is practically possible to wind one yarn per unit after doubling. It does not impede the

Example 1 For each unit, the number of friction disks of a 4-axis external friction temporary twisting device is arranged alternately between a combination of 6 disks and a combination of 9 disks (14 in Fig. 4 is replaced with a combination of 6 disks). The material of the contacting part of the friction disk is urethane rubber with a hardness of 96° and a diameter of 49.
．． 5φ, thickness 511! W was used.

The processing conditions were a processing speed of 400 m/1 ray, a temperature of the heat treatment device of 215° C., a length of the heat treatment device of 2.0 m, and a stretching ratio of 1.95 times, and sheet twisting was performed at the same time as stretching.

The feed system used 288D-48F round cross-section polyester briori-oriented yarn.

By setting the rotation speed of the friction disk in the following three ways,
Three types of special bulky textured yarns as shown in the table below were obtained.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the main parts of an example of a four-axis external repelling type friction disk type temporary twisting device used in the present invention, FIG. 2 is a plan view of the same, and FIG.
The figures are a plan view showing another aspect of FIG. 2, FIG.
The figures are explanatory diagrams of various yarn doubling methods. L2, 3, 4... Axis, A, B, C, D...
...Friction disk, Yl, Y2... Yarn, 11...
...Yarn package, 12, 12'... Delivery row 2.13, 13'... Heat treatment device, 14
, 14'...4-axis external friction temporary twisting device, 1
5, 15'... Take-up roller, 16°17.
18, 19... Yarn, 20... Guide, 21... Single yarn entangling device, 22... Winding device.

Claims (1)

[Claims] 1. A 4-axis circumscribed frictional twisting device equipped with friction disks capable of simultaneously and independently twisting two yarns is arranged alternately with the characteristics of the friction disks changed for each unit. , one yarn out of the two yarns processed by the friction twisting device of one unit is combined with one yarn of each adjacent unit, and wound as one yarn per unit. A method for producing bulky processed yarn, characterized by: