JP2000064136A - False-twisting method and false-twister - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a false-twisting method intended to prevent synthetic fibers from running out through controlling the heat treatment of a bulky yarn. SOLUTION: This false-twisting method comprises the following procedure: a false-twisted filament yarn Y is first heat-set under heating with a primary heater 6 to afford a bulk yarn Y1, which, in turn, is heated at relatively low temperatures with the respective heater sections 14, 15 of a secondary heater 7 and subsequently heated at relatively high temperatures to carry out a heat treatment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a false twisting method and a false twisting machine in which a synthetic fiber yarn is twisted and heat-set by heating to obtain a textured yarn.

[0002]

2. Description of the Related Art Conventionally, synthetic yarns (filament yarns, etc.) have been used as textured yarns. For example, a false twisting machine is used to twist the filament yarns, and the twisted filament yarns are heated. There is one that is heat-set and used as a textured yarn (textured yarn).

This false twisting machine is, as shown in FIG. 4, a filament yarn Y which is unwound from a yarn supplying package P1.
While stretching the first feed roller 52 and the second feed roller 53, the false twisting device 5 located between the rollers 52 and 53.
4 twists the filament yarn Y up to the first feed roller 52. Then, the twisted filament yarn Y is heat-fixed by heating with the primary heater 55 between the false twisting device 54 and the first feed roller 52.

In the false twisting machine, the heat-fixed yarn Y is transferred from the primary heater 55 to the cooling plate 56 to the false twisting device 5.
4, the second feed roller 53 in this order, and the false twisting device 54
After passing, the yarn Y is untwisted to form a bulked yarn Y1. Then, the bulky processed yarn Y1 is fed to the secondary heater 58 between the second feed roller 53 and the third feed roller 56.
By heat-treating, the crimp rate is adjusted appropriately. This secondary heater 58 is
Temperature (100 ℃ ~ 2 depending on the type of synthetic fiber yarn to be processed
50 ° C) and the bulky yarn Y is set at the set temperature.
1 is heat-treated.

In this way, the bulky textured yarn Y1 processed by the false twisting machine is wound up from the third feed roller 57 into the winding package P2.

[0006]

However, the bulky yarn Y1 heated by the primary heater 55 is cooled while passing through the cooling plate 56, the nip twister 54, etc., and is guided to the secondary heater 58. It is heated at a stretch to the set temperature and heat treated. Therefore, in the case of a microfilament yarn or a thick denier yarn, the cooled processed yarn Y1 is rapidly heated by the secondary heater 58 (100 ° C. to 25 ° C.).
It was found that at 0 ° C.), as shown in FIG. 5, the filament (synthetic fiber) jumps out from the processed yarn Y1 and a loop is formed. The protrusion of the filament deteriorates the quality of the processed yarn Y1 wound on the winding package P2.

[0007] The present invention is to prevent the synthetic fibers from jumping out by controlling the heat treatment of the textured yarn.

[0008]

The false twisting method of the present invention is a method in which the synthetic fiber yarn false twisted in the first step is heat-fixed by heating to obtain a bulked yarn, and heat treated in the second step. To do. Then, the heat treatment of the processed yarn in the second step is
The heating is performed at a low temperature and then at a high temperature. Specifically, in the heat treatment in the second step, a temperature (100 ° C. to 250 ° C.) according to the type of yarn to be bulk processed is set, and after the processed yarn is heated at a low temperature, the set temperature is set. Heat up to. In the second step, the textured yarn can be gradually heated and is not affected by sudden heating. Therefore, the processed yarn to be heat-treated can have its crimp rate adjusted appropriately while its shape is stable, and in particular, synthetic fibers can be prevented from popping out from the processed yarn that is easily affected by heat, such as microfilament yarn and thick denier yarn. .

The false twisting machine of the present invention heat-fixes the false twisting means for inserting false twists into synthetic fiber yarns and the synthetic fiber yarns falsely twisted by the false twisting means into a bulky finished yarn. A primary heater and a secondary heater that heat-treats the textured yarn false-twisted by the false-twisting means are provided. The secondary heater is a heater that can set a plurality of different temperatures in the yarn traveling direction. The secondary heater can gradually raise the temperature of the textured yarn and is not affected by sudden heating. Therefore, the processed yarn to be heat-treated can have its crimp rate adjusted appropriately while its shape is stable, and in particular, synthetic fibers can be prevented from popping out from the processed yarn that is easily affected by heat, such as microfilament yarn and thick denier yarn. .

Further, in the false twisting machine, the secondary heater is composed of a plurality of heater parts divided in the yarn traveling direction, and the temperature of each heater part can be controlled independently. By controlling the temperature of each heater unit, not only can the processed yarn be heated at a low temperature and then at a high temperature, but also the processed yarn can be heat-treated by continuously heating at a low temperature or at a high temperature. This allows the textured yarn to be heat-treated at a temperature according to the type of synthetic fiber yarn.

Further, in the false twisting machine, the secondary heater is bent. When the secondary heater is bent, the space such as the height of the false twisting machine is suppressed, and the secondary heater can be efficiently installed while the dimension of the secondary heater is lengthened. This is effective in suppressing the height of the machine base because the entire length of the secondary heater becomes long when the low temperature part is provided in a part of the secondary heater.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A false twisting method and a false twisting machine according to embodiments of the present invention will be described below with reference to the drawings. For convenience of description, first, the configuration of the false twisting machine will be described.

The false twisting machine 1 shown in FIGS. 1 and 2 performs bulkiness processing (texture processing) by heating filament yarn Y (synthetic fiber yarn) unwound from the yarn supply package P1 while stretching. It is applied and wound on the winding package P2. Here, the bulking process (texture process) means that the synthetic fiber yarn has a crimp form of a natural fiber such as wool to improve the texture of the synthetic fiber, thereby providing elasticity and bulkiness. It means imparting sex.

The false twisting machine 1 uses a bulky yarn Y1.
(Hereinafter referred to as "textured yarn Y1") winding package P2
A large number of winding mechanisms 2 for winding up on the machine, a machine stand 3 for arranging the winding mechanisms 2 in a plurality of horizontal rows in a vertical arrangement, a creel stand 4, and a nip twister for falsely twisting the filament yarn Y of the yarn supplying package P1. 5 (false twisting means), the primary heater 6 for heating the false twisted filament yarn Y, and the processed yarn Y
It includes a secondary heater 7 for heat-treating 1 and a controller 8 (see FIG. 2) for controlling the operation of the false twisting machine 1 as a whole.

The creel stand 4 is provided side by side on the machine base 3, and the yarn supplying package P in which the filament yarn Y is wound.
Holds the majority of 1. The filament yarn Y unwound from the yarn supply package P1 of the creel stand 4 is guided from the first feed roller 9 on the upper side of the machine base 3 to the second feed roller 10. The second feed roller 10 is provided on the machine stand column 11 facing the machine stand 3 on the opposite side of the creel stand 4, and together with the first feed roller 9, the filament yarn Y is formed.
Is maintained at a thread tension that enables drawing.

The nip twister 5 is provided on the machine support 11 between the first feed roller 9 and the second feed roller 10, and twists the filament yarn Y up to the first feed roller 9 ( False twist). Since the filament yarn Y is continuously traveling, it is untwisted after passing through the nip twister 5 and up to the second feed roller 10. With this, the filament yarn Y1 is continuously twisted between the nip twister 5 and the first feed roller 9, and then continuously untwisted between the nip twister 5 and the second feed roller 10. .

The primary heater 6 is installed between the first feed roller 9 and the nip twister 5, and heats the false twisted filament yarn Y by heating.
The primary heater 6 is controlled by the controller 8 to a temperature (temporary twisting temperature) at which heat fixing is possible (see FIG. 2). The primary heater 6 is, for example, provided with a grooved hot plate heated by the enclosed Dowsome steam, and a heater for heating the filament yarn Y falsely twisted in the groove of the hot plate is used. To be 12 is a yarn Y sent out from the primary heater 6.
Is a cooling plate that guides to the nip twister 5. The yarn Y is twisted, heat-set, and untwisted between the first feed roller 9 and the second feed roller 10, and becomes a bulky yarn Y1.

The secondary heater 7 is the second feed roller 10
By heat treating the textured yarn Y1 sent from the machine, the torque of the textured yarn Y1 is reduced, and only the bulkiness with an appropriate crimp rate is obtained. The secondary heater 7 includes a second feed roller 10 and a third feed roller 1.
It is provided between 6 and. The yarn feeding speed of the third feed roller 16 is slower than that of the second feed roller 10,
Therefore, the yarn is passed over the secondary heater 7 in an overfeed (relaxed) state.

The secondary heater 7 is composed of a first heater portion 14 and a second heater portion 15 which are divided into two parts. The heater portions 14 and 15 are arranged so as to be bent between the machine base column 11 and the machine base 3. The first heater portion 14 is arranged side by side on the machine base column 11, and extends continuously from the second feed roller 10 to the floor 17. Further, the first heater portion 14 is rotatable about the end of the second feed roller 10 as a fulcrum from a position parallel to the machine stand column 11 toward the machine stand 3 or vice versa. Second heater unit 15
Are arranged in parallel with each other in the vicinity of the floor 17 and extend from the machine stand column 11 to the third feed roller 16 of the machine stand 3 in succession to the first heater portion 14 which is swung and inclined.
Further, the second heater portion 15 is rotatable around the end on the side of the third feed roller 16 as a fulcrum from the floor 17 side toward the machine base 3 and vice versa. The heaters 14 and 15 are
For example, a dowsome vapor sealed between an outer pipe and an inner pipe having a double pipe structure, which heats a processed yarn running in the inner pipe is used.

The secondary heater 7 is now the first heater section 1
4 is rotated and positioned so as to be inclined with respect to the machine support 11, and the second heater portion 15 is rotated and positioned so as to be close to the floor 17, whereby the heater portions 14 and 15 are bent ( (L-shaped or V-shaped bent). In addition, the outlet side of the second heater portion 14 and the second heater portion 1
A removable cover 25 is provided on the inlet side of 4. In this way, by arranging the heater portions 14 and 15 so as to bend each other, it is possible to reduce the influence of heating between the heater portions 14 and 15. Further, the space such as the height of the false twisting machine 1 can be suppressed, and the secondary heater 7 can be efficiently installed while the dimension of the secondary heater 7 is lengthened. Then, the untwisted textured yarn Y1 sent to the secondary heater 7 passes through the first heater portion 14 and passes through the second heater portion 15 via the guide roller 20 to be heat-treated, and then the third feed. It is sent out from the roller 16 to each winding mechanism 2 and wound into the winding package P2. At the time of maintenance of the secondary heater 7, the cover 25 is removed and the first heater portion 14 is swung to be in a vertical state parallel to the machine support column 11.
5 is turned to a vertical state parallel to the machine base 3.

Further, in each of the heater portions 14 and 15, the heating temperature of the untwisted textured yarn Y1 is independently set and controlled. The temperature control of the heaters 14 and 15 is performed by the controller 8 of FIG. 2 controlling the temperature of the Dowsome vapor enclosed in the double pipe structure, for example. The controller 8 sets the temperatures of the heater units 14 and 15 based on the temperature setting data input by the operator. Further, the controller 8 is provided with a temperature control unit 18 that controls the temperature of each of the heaters 14 and 15. The temperature control unit 18 monitors the temperature states of the heater units 14 and 15 with the temperature sensor 19,
The heaters 14 and 15 are controlled to the set temperature (see FIG. 2).

With this, the secondary heater 7 has the respective heater portions 1
By controlling the temperatures of 4 and 15, untwisted textured yarn Y
In addition to low-temperature heating of 1 and high-temperature heating, continuous low-temperature heating or high-temperature heating of 1 can be performed.

As the structure of the secondary heater 7, the heater parts 14 and 15 can be freely rotated and arranged in a bent state, but the present invention is not limited to this. As a modified example of the secondary heater 7, as shown in FIG. 3, the first heater portion 14 and the second heater portion 15 are provided in a pipe 21 bent from the second feed roller 10 toward the third feed roller 16. The untwisted textured yarn Y1 may be heat-treated by continuously arranging. Also, the secondary heater 7
Although the heaters 14 and 15 divided into two have been described, the number of divisions is not limited.
Further, the heater may be one that can be set to a plurality of different temperatures in the yarn traveling direction even if it is not divided.

Next, the false twisting method will be described with reference to FIGS. 1 and 2.

The operator starts the false twisting machine 1 via the controller 8 and inputs temperature setting data for the heaters 14 and 15 of the secondary heater 7 to the controller 8. This temperature setting data is set within a range of 100 ° C. to 250 ° C. according to the type of synthetic fiber yarn to be processed, and the torque is reduced from the processed yarn Y to the second heater portion 15 to obtain an appropriate value. The crimping rate is set to a high temperature that leaves only the bulkiness, and the temperature is set to be lower than that of the second heater section 15 with respect to the first heater section 14. For example, when processing the microfilament yarn, the first heater unit 14
Is set to a temperature of 150 ° C., and the second heater unit 15 is set to a temperature of 200 ° C.

By the winding operation of each winding mechanism 2 of the machine base 3, the filament yarn Y is unwound from the yarn supplying package P1 of the creel stand 4. This filament thread Y
Is from the first feed roller 9 to the second feed roller 10
In the process of reaching (1), false twisting is performed by the nip twister 5, and heat is fixed by heating by the primary heater 6. The yarn Y sent out from the primary heater 6 is untwisted by the nip twister 5,
It becomes the bulky processed yarn Y1 and is sent out to the secondary heater 7 by the second feed roller 10.

Subsequently, the processed yarn Y1 is fed to the first heater portion 1
4 and the second heater section 15 in this order, and the first heater section 1
In step 4, the temperature is raised to a temperature (150 ° C.) lower than that of the second heater section 15. Then, the processed yarn Y1 heated at low temperature is
By being heated to a high temperature (200 ° C.) by the heater unit 15, the torque is reduced, and a heat treatment that leaves only the bulkiness with an appropriate crimp rate is performed. At this time, the processed yarn Y1
Is gradually heated by heating at a low temperature and then at a high temperature, and is not affected by rapid heating (influence of temperature change or thermal energy change). Therefore, the crimp ratio of the textured yarn Y1 to be heat-treated can be appropriately adjusted while the morphology is stable, and in particular, synthetic fibers are prevented from popping out from textured yarns such as microfilament yarn and thick denier yarn which are easily affected by heat. Can be prevented. Then, the processed yarn Y that has been heat-treated by the secondary heater 7 is sent out from the third feed roller 16 to each winding mechanism 2, and is wound into the winding package P2 by each winding mechanism 2.

In the heat treatment of the textured yarn Y1, the textured yarn Y1 is heated at a low temperature and then at a high temperature by controlling the first heater portion 14 at a low temperature and the second heater portion 15 at a high temperature. , But is not limited to this. That is, according to the type of the yarn Y1 to be bulked and the like, each heater unit 1
The textured yarn Y1 may be heat-treated by controlling the temperatures 4 and 15 at the same low temperature and by controlling the temperature at the same high temperature.

[0029]

According to the false twisting method of the present invention, the textured yarn can be gradually heated in the second step and is not affected by rapid heating. Therefore, the textured yarn to be heat treated can have its crimp rate adjusted appropriately while its shape is stable,
In particular, it is possible to prevent a synthetic fiber from jumping out from a processed yarn such as a microfilament yarn or a thick denier yarn that is easily affected by heat and causing a loop. As a result, the quality of the textured yarn can be improved.

The false twisting machine of the present invention can provide a secondary heater which can improve the quality of the bulky processed yarn.

Further, in the false twisting machine, since the temperature of each heater can be controlled independently, it is possible not only to heat the processed yarn at a low temperature but then to a high temperature, but also to continuously perform a low temperature heating,
Alternatively, it can be heated to a high temperature. This allows the textured yarn to be heat-treated at a temperature according to the type of synthetic fiber yarn.

Further, in the false twisting machine, since the secondary heater is bent, the space such as the height of the false twisting machine can be suppressed and the secondary heater can be elongated and installed efficiently.

[Brief description of drawings]

FIG. 1 is a view showing a false twisting machine.

FIG. 2 is a block diagram showing a controller of a false twisting machine.

FIG. 3 is a partially enlarged view showing a modified example of the secondary heater.

FIG. 4 is a schematic view showing a conventional false twisting machine.

FIG. 5 is an enlarged view showing a state where synthetic fibers have jumped out from a bulky textured yarn.

[Explanation of symbols]

1 False twisting machine 2 winding mechanism 3 machines 4 creel stand 5 Nip twister (false twisting means) 6 Primary heater 7 Secondary heater 8 controller 9 First feed roller 10 Second feed roller 11 machine stand 12 Cooling plate 14 First heater part 15 Second heater part 16 Third feed roller 17 floor 18 Temperature controller 19 Temperature sensor 20 Guide roller 21 pipes

Claims (4)

[Claims] 1. A false twisting method comprising a first step of heat-setting a false-twisted synthetic fiber thread by heating to obtain a bulky textured thread, and a second step of heat-treating this textured thread. The heat treatment in the second step is a false twisting method in which the textured yarn is heated at a low temperature and then at a high temperature. 2. A false twisting means for adding false twist to a synthetic fiber yarn,
It includes a primary heater that heat-fixes the synthetic fiber yarn false-twisted by the false-twisting device by heating to obtain a bulk-textured yarn, and a secondary heater that heat-treats the bulk-textured yarn false-twisted by the false-twisting device. A false twisting machine according to claim 1, wherein the secondary heater is a heater capable of setting a plurality of different temperatures in the yarn traveling direction. 3. The false twisting process according to claim 2, wherein the secondary heater is composed of a plurality of heater parts divided in the yarn traveling direction, and the temperature of each heater part can be independently controlled. Machine. 4. The false twisting machine according to claim 3, wherein the secondary heater is bent.