JPH0754226A - Device for drawing and false-twisting yarn - Google Patents

Abstract

PURPOSE:To provide the device for drawing and subsequently false-twisting a yarn, capable of obtaining a processed yarn little in dyeing irregularity and having a high quality without causing the instability of the drawing point position of the yarn due to the fluctuation of false-twisting torque and the vibration of the yarn. CONSTITUTION:The yarn-drawing and false-twisting machine comprising a heating means 3 for heating a traveling yarn and a false-twisting means 5 disposed in the downstream from the heating means and used for drawing and false-twisting the yarn is characterized in that a twist-stopping means 11 for stopping the propagation of the twists by the false-twisting means is disposed in the heating means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn drawing and false twisting device for drawing a synthetic fiber yarn such as polyester and polyamide and then giving false twist to the yarn.

[0002]

2. Description of the Related Art In a conventional drawing false twisting apparatus, as described in Japanese Utility Model Laid-Open No. 59-73378, one drawing heating means is provided in a drawing false twisting section, and the heating means, that is, the upstream side of the heating means. A yarn twist guide is arranged on the inlet side of the heater.

[0003]

However, in recent years, the drawing false twisting apparatus has increased the yarn processing speed, and accordingly the number of twists has increased. In the above-mentioned prior art, since the twist guide for the yarn is arranged upstream of the heating means, the twist imparted by the false twist means is provided along the yarn from the inside of the heater to the twist guide of the heater inlet. , And the twist reaches the drawing point of the yarn or its vicinity. Therefore, the false twisting torque and the vibration of the yarn make the position of the drawing point of the yarn unstable, which causes a problem that uneven dyeing occurs on the yarn.

[0004]

It is an object of the present invention to prevent the position of the drawing point of the yarn from becoming unstable due to false twisting torque and vibration of the yarn, and to obtain a high quality processed yarn with less uneven dyeing. An object is to provide an apparatus for processing.

[0005]

According to the present invention, there is provided a heating means for heating a traveling yarn, and a false twisting means arranged downstream of the heating means for twisting the yarn. In a false false twisting machine for drawing a yarn to be false twisted, a twist stopping means for stopping the propagation of twist by the false twisting means,
This is achieved by a yarn drawing and false twisting device, which is arranged inside the heating means.

[0006]

According to the present invention, since the yarn twisting means is provided in the heating means, the yarn is stretched at an upstream portion of the twisting means, that is, at a position where no twist is applied. It is possible to produce it and to suppress the stretching in the twist. Therefore, even if the yarn twists due to false twisting torque unevenness or vibration of the yarn occurs, the position of the drawing point can be set to a stable position, and the quality of the obtained processed yarn can be improved. Is possible

[0007].

The present invention will be described in detail below with reference to the accompanying drawings showing the embodiments of the present invention. 1 is a cross-sectional view of a drawing false twisting device of the present invention, FIG. 2 is a cross-sectional view of heating means, FIG. 3 is a view in the direction of arrow A, and FIG. 4 is a cross-sectional view of a twisting roller.

In FIG. 1, a yarn Y (a semi-stretched yarn of a synthetic fiber yarn such as polyester or polyamide) drawn from a supply raw yarn 1 by a pair of drawing rollers 2a and 2b (PO
Y), or undrawn yarn (UDY), is drawn between the supply roller 30 including a pair of nip rollers and the feed roller 6 including a pair of nip rollers.

Between the supply roller 30 and the feed roller 6,
The heating device 3 bent in an L shape, and the pair of stabilizing racks 4 arranged in a dogleg shape on the downstream side of the heating device 3.
A false twisting device 5 for twisting the yarns a, 4b and the yarn Y is provided. The stabilizing racks 4a and 4b cool the yarn Y heated by the heating device 3. The false twisting device 5 may be a known spindle type, multi-axis multi-plate type, or any other type.

The twist imparted by the false twisting device 5 goes back upstream along the yarn Y and is heated in the heating device 3 so that the twist is thermally fixed.

A second heater 31 is appropriately provided on the downstream side of the feed roller 6, and the second heater 31 is not provided if necessary. Further, after passing through the feed rollers 9 and 10,
The yarn Y is wound up as a package 8 by a winding device including the friction roller 7 and the cradle.

The structure of the heating device 3 will be described with reference to FIG. The heating device 3 of the illustrated embodiment is bent in an L-shape as shown in FIGS. 1 and 2, and a case 12 of the heating device surrounding each of the bent parts, this case 12
The sheathed heaters 15 and 18 provided in the inside, and the heating plate 1 of the heating means that is heated by the sheathed heaters 15 and 18, respectively.
The heating plates 17 and 20 are provided with a large number of yarn regulating guides 16 and 19 each having grooves 16a and 19a for yarn traveling in the center thereof on the surfaces of the heating plates 17 and 20. It should be noted that instead of the sheathed heaters 15 and 18, other heating bodies may be used.

A twist-preventing roller 11 is provided at an intermediate portion of the two false twisting device portions bent in the L-shape formed as described above.
Is rotatably provided. The twist roller 11 is shown in FIG.
Is provided on the supporter 26 so as to be movable between a normal processing position indicated by a solid line and a yarn hooking position indicated by a broken line. As a result, the heating device 3 is separated into two parts 13 and 14 upstream and downstream of the twisting roller 11. In FIG. 2, reference numeral 21 indicates a heat insulating material of the heating device 3.

Details of the twisting roller 11 are shown in FIG. The shaft 23 is fastened to the supporter 26 by a nut 27. The shaft 23 has a large number of grooves 23 in a V shape.
A is formed on the peripheral surface thereof, and the twisting roller main body 22 is attached to the portion where the groove is formed. In this manner, the twist roller 11 has a fluid dynamic air bearing between the shaft 23 and the twist roller body 22.

The flanges 24 and 25 are provided with a thrust groove on the side surface of the anti-twist roller, are fitted to the shaft 23, form a thrust air bearing by the thrust groove, and move in the axial direction of the anti-twist roller 11. It is designed to prevent

On the surface of the anti-twisting roller body 22, a large number of blade members 22a, which are well known in ordinary twisting rollers, are alternately formed.

In the present embodiment having the above structure, the yarn Y drawn from the supply raw yarn 1 is stretched between the supply roller 30 and the feed roller 6. In this case, it is heated by the heating means 3 and is stretched by the speed difference between the supply roller 30 and the feed roller 6. In particular, heater 3
A twisting roller 11 is provided inside, and the twisting roller 11 is applied by the false twisting means 5 to trace back the twisting. In this apparatus, the yarn is stretched by the time it reaches the twisting roller 11, and the stretched point is fixed because the twisted yarn is imparted to the yarn stretched in that state, and thus the yarn is The so-called processed yarn of the thread has very good yarn quality.

In the present embodiment, the temperature of the yarn running through the heating means 3 is heated from the inlet side, and the twisting is performed at a position closer to the false twisting device 5 than the position where the temperature exceeds the glass transition point. A stop roller 11 is installed. Therefore, the yarn Y heated by the heater is heated to a temperature exceeding the glass transition point between the inlet and the twisting roller, so that the yarn is reliably drawn during this period.

Another embodiment of the present invention will be described with reference to FIG. In this embodiment, the heating means 3 is arranged in a substantially linear shape as shown in FIG. 5 (a), without being bent into an L shape as in the above-mentioned embodiments. 5B, when viewed in the direction of arrow B in FIG. 5A, the yarn twisting stopping means is composed of three rollers 31, 32, 33 arranged in a staggered arrangement. Similarly, in FIG. 5C, the roller 32 and the pin 34 are arranged so as to deviate from the yarn path. As a result, the guide roller 31 and the pin 34 are arranged on the upstream side of the twisting means 32 and the roller 32 which is the twisting means, and the yarn is bent between the guide and the roller 32 which is the twisting means. By doing so, the twisting is prevented from going back to the yarn upstream of the twisting means 11, and the yarn is stretched up to the twisting means, and after being stretched, it is twisted. It is supposed to be hung.

In particular, as shown in FIG. 5 (c), the yarn is bent between the roller 32 which is the twisting means and the guide pin 34, and the friction of the guide causes a difference in tension between the upstream and downstream of the yarn guide. By so doing, it is possible to ensure that stretching occurs in this twisting guide.

As another embodiment, as shown in FIG. 5 (d),
A roller 35 having a rotation axis orthogonal to the plane of FIG. 5A is rotatably provided between the yarn regulation guides 19 of the heating plate, and the yarn Y traveling on the yarn regulation guide 19 by this roller 35.
You may push in. The roller 35 acts as a twisting stopping means to stop the twisting retroactively along the yarn by the roller 35, and the installation position of the roller 35 is downstream of the position where the yarn temperature becomes the glass transition point. Since it is located on the side, the stretching point is reliably fixed between the inlet of the heating device and the roller 35, and twist is applied after the fixing, so that the variation of the stretching point can be prevented.

Particularly, when the high resistance imparting means is provided in the heating means as shown in FIG. 5 (c), between the resistance imparting means to the yarn and the twist stopping means by this imparting means. It is preferable that the resistance is set to be larger than the resistance received by the yarn. By doing so, the stretching point can be reliably fixed in the high resistance imparting means.

[0023]

According to the present invention, since the twisting means for the yarn is arranged in the heating means, the yarn is twisted at the upstream portion of the twisting means, that is, at the position where no twist is applied. Stretching can be caused, and stretching in the twist can be suppressed. Therefore, even if the yarn is shaken due to uneven twisting torque of the yarn or vibration of the yarn, the position of the drawing point can be set to a stable position, and the yarn quality of the obtained processed yarn can be improved. It will be possible.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a drawing false twisting device of the present invention.

FIG. 2 is a cross-sectional view of heating means.

FIG. 3 is a view on arrow A.

FIG. 4 is a sectional view of a twisting roller.

FIG. 5 shows another embodiment of the present invention, (a) is a sectional view,
5 (b) and 5 (c) are views from the arrow B of FIG. 5 (a), and FIG.
A part of the sectional view similar to FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Supplied yarn 2a Draw roller 2b Draw roller 3 Heating device 4a Stabilizing rack 4b Stabilizing rack 5 False twisting device 6 Feed roller 7 Friction roller 8 Package 9 Feed roller 10 Feed roller 11 Twisting roller 12 Heating device case 13 Twist Heating device upstream of the stop roller 14 Heating device downstream of the twisting roller 15 Sheath heater 16 Yarn regulation guide 17 Hot plate of heating means 18 Sheath heater 19 Yarn regulation guide 20 Hot plate of heating means 21 Insulation material 22 Twisting roller body 23 Shaft 23a Groove 24 Flange 25 Flange 26 Supporter 27 Nut Y Yarn

Claims (5)

[Claims] 1. A heating means for heating the running yarn, and a false twisting means arranged downstream of the heating means for twisting the yarn,
In a yarn drawing false twisting machine for drawing and false twisting a yarn, twisting stopping means for stopping propagation of twist by the false twisting means is provided inside the heating means. Yarn drawing false twisting device. 2. The yarn according to claim 1, wherein the twisting means is disposed closer to the false twisting means than the position where the temperature of the yarn passing through the heating means exceeds the glass transition point. Stretching false twisting device. 3. The yarn according to claim 1 or 2, wherein the twisting means is a rotatable rotary roller, and the bearing of the rotary roller is a fluid dynamic bearing. Stretching false twisting device. 4. A guide is arranged upstream of the twisting means, and a yarn is bent between the guide and the twisting means,
The draw false twisting device of the yarn according to claim 1 or 2, wherein a tension difference is obtained between upstream and downstream of the guide by friction of the guide. 5. A yarn high resistance imparting means is provided upstream of the twisting means and in the heating means, and the resistance imparted to the yarn by the high resistance imparting means is the same as that of the high resistance imparting means. The drawing false-twisting device for a yarn according to claim 1, wherein the yarn has a resistance larger than a resistance that the yarn receives between the twisting means.