JPH0315568Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement in a false twisting device for producing false twisted bulky yarn from undrawn yarn, semi-drawn yarn, or drawn yarn.

(Prior art) A yarn made of polyamide or polyester thermoplastic fibers is run and given a temporary high-density twist, then the twisted yarn is heated and then cooled. It is known that by fixing the twist imparted to the yarn by heat and then untwisting the twist, it is possible to obtain a stretchable bulky yarn that is bulky and highly elastic, and is usually referred to as a woolly yarn. Various types of false twisting machines have been proposed for producing stretchable bulky yarns.

However, as yarn processing speeds have recently increased, various drawbacks have increasingly appeared in conventional false twisting devices.

For example, in Publication No. 40-21002, on a first frame, in order from the bottom, a first yarn feeding device, a first yarn heating device, a false twisting device, a second yarn heating device,
A false twisting machine is shown in which the third yarn feeding device is arranged substantially in a straight line. This false twisting machine exhibited excellent characteristics at yarn processing speeds of up to about 200 m/min, and was widely used. However, when the yarn processing speed increases to 400 m/min or more, not only the first and second yarn heating devices in the false twisting machine become longer, but also the first yarn heating device and the false twisting device become too large. The thread cooling device in between also becomes long, making the machine extremely tall and difficult to store in a normal building. Further, there is a problem that the threading workability is deteriorated.

In order to solve these problems, various proposals have been made to heat and cool the yarn in short lengths.

For example, Japanese Patent Publication No. 50-24375 proposes heating a high-speed yarn over a fairly short length using a moist heat heating device using labyrinth packings at both ends of a heating cylinder. However, when such a heating device is used as the first heating device of the false twisting machine disclosed in the above-mentioned Japanese Utility Model Publication No. 40-21002, the steam leaking from the labyrinth packing becomes mist along with the accompanying airflow of the yarn. This caused problems in practical use, such as the droplets trailing around and corroding machines, or dropping as droplets and touching the threads, causing uneven quality.

Furthermore, Japanese Patent Application Laid-Open No. 56-154528 discloses a false twisting system in which a yarn supply mechanism, a dry heat heater, a wet heat heater, a yarn cooler, a false twisting mechanism, and a yarn winding device are arranged in this order. A processing device is disclosed. However, although this device has been devised to eliminate steam leakage from the wet heat heater, the length of the yarn cooler is long, so the overall length of the wet heat heater and yarn cooling device is long. Therefore, it is necessary to arrange the wet heat heater and the yarn cooling device vertically in a line, or to arrange the wet heat heater and the yarn cooler at an angle of approximately 40 degrees to the floor surface. However, the height of the entire device increases.

On the other hand, regarding the cooling device, there is a method in which the yarn is cooled by using a binding plate whose back surface is forcibly cooled with a refrigerant.

However, with this method, it is difficult to overcome the drawback that the cooling length becomes longer as the processing speed increases.

Next, a method of applying a liquid such as water or oil to the yarn is shown in, for example, JP-A-57-42938, but the equipment is extremely complicated and it is difficult to control the amount of liquid. , it was impractical.

(Problems to be solved by the invention) The purpose of the invention is to improve the above-mentioned deficiencies of the conventional technology and to provide a high-speed false twisting device that is compact in its entirety and can produce high-quality bulky yarn. be.

(Means for Solving the Problem) In order to achieve the above object, the present invention consists of the following configuration.

That is, a yarn supply section consisting of a supply yarn creel and a first yarn feeding device is arranged on one side of the working path, and a false twisting device, a second yarn feeding device, a second yarn heating device, and a first yarn feeding device are arranged on one side of the working path. A yarn processing section consisting of a yarn feeding device and a winding device of No. 3 is arranged on the other side across the working path, and a moist heat is applied between the first yarn feeding device and the false twisting device. A first yarn heating device consisting of a heater and a yarn heat treatment section consisting of a yarn cooling device are disposed, and the yarn is run from the supply section to the processing section to impart false twist to the yarn. In the twisting device, (a) the first yarn heating device and the yarn cooling device of the heat treatment section are arranged in this order substantially horizontally and close to each other along the yarn traveling direction; ) The first yarn heating device comprises a moist heat heater having a yarn entrance and exit formed in a constricted shape at both ends; (c) The yarn cooling device includes a back surface that is actively cooled with a cooling medium; A false twisting device is characterized in that it includes a grafting plate having a concave cross section with respect to the yarn traveling direction.

(Function) Both the wet heat heater and the thread cooler are arranged almost horizontally and close to each other, so that
The yarn can easily guide the steam that slightly leaks from the constriction part along with the accompanying airflow when leaving the wet heat heater to the grafting plate of the yarn cooler, and a liquid film is formed on the grafting plate. is formed. Note that the liquid film is difficult to run off because the suction plate is arranged horizontally.

This liquid film comes into contact with the yarn, absorbs latent heat, and evaporates, so cooling of the yarn is extremely accelerated.

In addition, since the suction plate of the yarn cooler has a concave cross-sectional shape, it effectively captures vapor in the accompanying airflow and thickens the liquid film, and the concave grooves form the thickened liquid film. , and the cooling of the yarn is further promoted.

Since cooling of the yarn is promoted in this way, the length of the yarn cooler can be shortened.

Therefore, both the wet heat heater and the thread cooler are
Even if the apparatus is arranged substantially horizontally, there is no need to widen the space between the yarn supply section and the yarn processing section, and there is no need to vertically arrange the two, making the apparatus compact.

Furthermore, since both the wet heat heater and the yarn cooling device are arranged almost horizontally, the yarn path on the grafting plate is stabilized by the weight of the yarn, making it possible to process with low tension, resulting in high quality yarn.

(Example) FIG. 1 is a schematic diagram showing an example of a false twisting apparatus according to the present invention.

In FIG. 1, a plurality of supply yarn packages 1
are suspended on the supply yarn creel 2 with appropriate spacing. The supply yarn 3 pulled out from the supply yarn package 1 runs almost vertically upwards, enters the first yarn feeding device 5, and then changes direction almost horizontally to the first yarn heating device 6 and yarn cooling device 7. , the false twisting device 8 and the second yarn feeding device 9 in this order, the stretchable bulky yarn having bulkiness and stretchability, so-called
It becomes woolly thread 4. The woolly yarn 4 is then passed through the second yarn heating device 13 and the third yarn feeding device 14 below the second yarn feeding device 9. The bulky yarn 15 is heat-treated under controlled tension between
is obtained.

The bulky yarn 15 exiting the third yarn feeding device is further wound into a package 18 by a winder 17 provided adjacent to the working path side of the second yarn heating device 13.

FIG. 2 shows an example in which the first yarn heating device 6 used in the false twisting device according to the present invention is a moist heat heater 6'.
And, it is a schematic diagram showing an example of a yarn cooling device 7.

The supplied yarn 3 that has exited the first yarn feeding device enters the heat treatment section 21 through the narrowed part 24' of the wet heat heater 6' in a twisted state, and enters the steam fluid 22 blown from the blowing port 23'. As a result, it is subjected to heat treatment, exits the moist heat heater 6' through the narrowed portion 24'', and is guided to the yarn cooling device 7. Drain generated inside the yarn is
The liquid is appropriately guided out of the apparatus through the discharge port 23''.

The supplied yarn 3 leaving the wet heat heater 6' travels in contact with the suction plate 27 of the yarn cooling device 7 along with the steam slightly leaking from the narrowed portion 24'', accompanied by the accompanying airflow of the yarn. The back surface of the thread plate 27 is actively cooled by a refrigerant such as water supplied from the supply port 25, and the refrigerant is discharged outside the device from the discharge port 26.

The supplied yarn 3 is cooled by the grafting plate 27, and at the same time, the leaked steam is also cooled by the grafting plate 27, forming a liquid film 22' on the grafting plate 27.

The liquid film 22' comes into contact with the supply yarn 3, absorbs latent heat, and evaporates, so that the cooling of the yarn is extremely accelerated.

The vapor evaporated at this time is cooled again in contact with the joining plate 27 to form a liquid film, so that the yarn can be efficiently cooled with a small amount of leaked vapor. Note that in order to effectively capture the vapor in the accompanying airflow and turn it into a liquid, the cross section of the suction plate 27 with respect to the yarn traveling direction is formed in a concave shape. Furthermore, it is even more effective to provide a lid that can be opened and closed on the top surface to promote circulation of steam. Furthermore, in order to promote the cooling effect on the splicing plate 27 due to the steam leaking from the narrowed part 24'' of the moist heat heater 6', the moist heat heater 6' and the yarn cooling device 7 are arranged almost horizontally and , are arranged close to each other. If necessary, the space between the moist heat heater 6' and the yarn cooling device 7 may be covered with a heat insulating member to prevent the accompanying airflow from escaping.

Fig. 3 shows a dry heat heater shown in Japanese Patent Application Laid-Open No. 154528/1983 in order to further improve the quality of the yarn obtained by a false twisting device using a wet heat heater 6'. This is another embodiment in which the preheater 29 is provided immediately before the wet heat heater 6'.

In the embodiment shown in FIG. 3, immediately after leaving the first yarn delivery device 5, the feed yarn 3 changes direction vertically, and the dry heat heater 29 is installed approximately vertically.
The yarn is passed through the yarn in a twisted state, heated to a temperature higher than the drawing temperature, and then bent horizontally by a guide 30 and guided to a wet heat heater 6', a yarn cooling device 7, and a false twisting device 8. The twist propagated from the false twisting device 8 is slightly prevented from going back to the dry heat heater 29 by the guide 30, but the twist propagated by the wet heat heater 6' and
Since the twist propagates to the yarn cooling device 7 in a substantially straight line, an excellent yarn path configuration is realized in which the number of false twists finally set by heat is high.

In the embodiment shown in FIGS. 1 and 3, 19 is a thread-hanging work trolley that moves along the work path, and 31 is a thread suction pipe provided above the winder 17. .

Next, the thread threading operation of the false twisting device having the above structure will be explained based on FIG. 1.

First, the steam valve (not shown) of the wet heat heater 6' of the plow for threading is closed, and the inside of the heater 6' is returned to atmospheric pressure. Next, the supply yarn 3 is unwound from the supply package 1 suspended on the supply yarn creel 2 and introduced into the first yarn feeding device 5 in the disconnected state. Thereafter, the supply thread 3 is introduced into the first heating device 6 through the narrowed portions 24' and 24'' using a piano wire or the like.
In the case of a sealing type as described in Japanese Patent No. 99348, it is also possible to remove the narrowed portions 24' and 24'' and thread the thread with a suction gun.

Next, the supplied yarn 3 is cut off and brought into a threading state where it does not contact the yarn cooling device 7 with the guide 32, and the false twisting device 8 which is not in the twisted state and the second thread which is in the separated state.
After passing the yarn through the suction pipe 3 sequentially,
Let 1 suction the thread. Next, after the yarn is run by the second yarn feeding device, the false twisting device 8 is operated in a twisting state, and while giving a twist to the yarn, the yarn is removed from the separation guide 32 and brought into contact with the yarn cooling device 7. , put the first yarn feeding device 5 into the processing state.

Note that in the false twisting device of the embodiment shown in FIG. After the first yarn feeding device 5 enters the processing state, the yarn is removed from the guide 33 and run in contact with the dry heat heater 29.

In the case of a heating device such as that described in JP-A No. 52-99348, after the threading operation is completed,
The narrowed portions 24', 24'' are attached to the heater again.

Thereafter, a steam supply valve (not shown) is opened to bring the wet heat heater 6' into the yarn processing state.

Next, a suction gun is connected to the yarn outlet side of the second heating device 13, and the yarn suctioned by the suction pipe 31 is introduced into the yarn inlet of the second heating device 13, and the second yarn Threading the heating device 13, sending out the thread by the third thread feeding device 14,
It is wound up into a package 18 by a winding device 17. The threading work can be carried out by one person using the trolley 19.

In the above embodiment, the first yarn feeding device, the second yarn feeding device, and the third yarn feeding device are feeding devices using an apron belt, but the present invention is not limited to this, and other known methods may be used. You can also use.

(Effects of the invention) The false twisting device according to the invention has the following effects by adopting the above configuration.

First, the steam leaking from the constricted part of the wet heat heater is easily guided onto the grafting plate, and the liquid film of leaked steam formed on the grafting plate is difficult to flow down. , it can effectively contribute to cooling the yarn, and the length of the yarn cooling device can be significantly shortened.

Therefore, both the wet heat heater and the thread cooler are
Even if they are arranged almost horizontally, there is no need to widen the space between the yarn supply section and the yarn processing section, and there is no need to arrange both the wet heat heater and the yarn cooler vertically or at an angle. Therefore, the height of the device can be reduced and a compact false-twisting device that is not restricted by the building can be achieved.

Second, the wet heat heater and the yarn cooling device are arranged almost horizontally along the yarn traveling direction, and the yarn cooling device is provided with a suction plate with a concave cross section, which reduces the amount of air in the accompanying airflow. The vapor is effectively captured to thicken the liquid film, and the concave groove retains the thickened liquid film, further promoting cooling of the yarn.

Third, since the steam leaking from the constricted part of the wet heat heater is reused for cooling the yarn, there is no need for complicated equipment to remove the leaked steam, simplifying the equipment and reducing the overall is made more compact.

Fourthly, both the wet heat heater and the thread cooling device are
Since it is arranged almost horizontally, the thread path on the grafting plate is stabilized by the weight of the thread, making it possible to process with low tension.
High quality yarn can be obtained.

Fifth, since the yarn path from the twisting device to the first yarn feeding device is cut almost straight, the propagation of the twist is not hindered and a high quality bulky yarn can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of the false twisting device according to the present invention, and FIG.
FIG. 3 is a schematic diagram showing one embodiment of the yarn heating device and yarn cooling device, and FIG. 3 is a schematic diagram showing another embodiment of the false twisting device according to the present invention. Explanation of symbols in the drawings: 1: Supply yarn package;
2: Supply yarn creel, 3: Supply yarn, 4: Wooly yarn, 5: First yarn feeding device, 6: First yarn heating device, 6': Moist heat heater, 7: Yarn cooling device, 8: Temporary Twisting device, 9: second yarn feeding device, 13: second
yarn heating device, 14: third yarn feeding device, 17:
Winding device, 18: package, 24', 24'': narrowed portion, 31: thread suction pipe.

Claims (1)

[Scope of Claim for Utility Model Registration] A yarn supply section consisting of a supply yarn creel and a first yarn feeding device is arranged on one side of a working path,
A yarn processing section consisting of a false twisting device, a second yarn feeding device, a second yarn heating device, a third yarn feeding device, and a winding device is arranged on the other side across the working path, A first yarn heating device consisting of a wet heat heater and a yarn heat treatment section consisting of a yarn cooling device are disposed between the first yarn feeding device and the false twisting device; In a false twisting device that causes the yarn to travel from the processing section to the processing section to impart false twist to the yarn, (a) the first yarn heating device and the yarn cooling device of the heat treatment section are operated in this order to advance the yarn; (b) The first yarn heating device includes a wet heat heater having a yarn entrance and exit formed in a constricted shape at both ends. (c) The yarn cooling device is a false twisting device characterized in that the yarn cooling device is equipped with a grafting plate whose back surface is actively cooled with a cooling medium and whose cross section with respect to the yarn traveling direction is concave. .