JPH08199443A - Heater and yarn-threading device therefor - Google Patents

Abstract

PURPOSE: To enable easy yarn-threading through a heater used in textile machinery, for example, a false twister or a drawing-false twister without yarn breakage by fusing. CONSTITUTION: A heater is equipped with a set of plural balloon-stopping guides 33 which are freely detachally provided from a yarn-threading route in the heater and between heating elements which are arranged in plural rows and the heater has a nozzle 36 jetting air in the yarn-running direction when threading. This yarn-threading device is equipped with a straight pipe for conveying yarn taken out of a package along the air flow and a slit pipe which extends from the outlet of the straight pipe to the inlet of the heater, where its axis line is wound in a spiral shape and a slit is formed on the lower side along this axis line and has a nozzle jetting air to the center of the spiral and in the yarn-running direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention makes threading easy,
The present invention relates to a heater for a textile machine such as a false twisting machine and a drawing false twisting machine, and a threading device suitable for the heater.

[0002]

2. Description of the Related Art Non-contact heaters used in conventional false twisting machines and draw false twisting machines are of the slit type in which slits are formed along the yarn running direction. , The heater lid is opened and the running yarn is dropped into the slit.

[0003]

In recent years, a non-contact high-temperature tubular heater having high thermal efficiency has been developed in place of the slit type heater, but the non-contact high-temperature tubular heater prevents heat escape as much as possible. Since it is wrapped with a heat insulating material and is not provided with a lid, it is impossible to directly adopt the thread hooking method of the slit type heater for thread hooking of this non-contact high temperature tubular heater.

According to the present invention, a heater used in a textile machine such as a false twisting machine or a drawing false twisting machine does not fuse the yarn,
The purpose is to make it easy to pass.

[0005]

In order to achieve the above-mentioned object, the heater of the present invention is such that a plurality of sets of heating elements arranged in a plurality are arranged so that they can be brought into contact with and separated from the yarn path of the heater. It has a balloon stop guide arranged,
Alternatively, it has a nozzle for ejecting air toward the yarn advancing direction during threading. In addition, the threading device includes a straight pipe that carries the yarn drawn out from the package on an air flow and conveys it, extends from the outlet to the heater inlet, is spirally wound, and has a slit formed below the axial line to form an inner wall. And a slit pipe having a nozzle tangential to and jetting air toward the yarn advancing direction.

[0006]

In the invention constructed as described above, when air is supplied to the straight pipe and the slit pipe, the yarn drawn from the package along with the respective air flows moves through the straight pipe and the slit pipe. Go into the heater. The progress is assisted by the air ejected from the nozzle inside the heater, and the yarn comes out of the heater.
Then, he continues to run while being attracted to the waiting hand soccer. At this time, the yarn is protected by being surrounded by the air jetted from the nozzle inside the heater, which is adiabatically expanded and the temperature of which is lowered, and passes smoothly without contacting the wall surface of the heater, and thus does not melt. Moreover, the heating element is also cooled by the air. When the supply of each air is stopped, the running yarn escapes from the slit of the slit pipe and a predetermined yarn path is formed. Further, at the time of threading, the balloon stopper guides of each set are separated from each other to open the thread path and facilitate threading.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS.

The heater to which the threading device [A] of the present invention is applied is, for example, the first one in the drawing false twisting machine shown in FIG.
Used for heater 3. This draw false twisting machine includes a creel stand 1 on which a yarn supplying package 2 in which partially drawn yarns are wound, a first heater 3, and a cooler 4 are provided.
The twisting device 5, the second heater 6, and the take-up winder 7 forming the winding package 8 for the processed yarn are already known. In this drawing false twisting machine, the yarn Y is false twisted by the twisting device 5 and spreads to the first heater 3. There, the yarn Y is plasticized and advances to the cooler 4 to fix the twisted state. Then, when passing through the twisting device 5, reverse twisting is applied, and crimps are manifested in each filament, and the filament becomes bulky. Then, the process proceeds to the second heater 6, the torque is reduced, and the winding package 8
Rolled up. Meanwhile, the yarn Y is about 1.2 times for the polyamide yarn and about 1.6 times for the polyester yarn,
Each is stretched.

First, the first heater 3 will be described with reference to FIGS. The first heater 3 is shown in FIG.
1 shows one heating element 31 constituting the.

As shown in FIG. 3, the heater 3 includes a plurality of heating elements 31 having a yarn traveling space 32, a balloon stopper guide 33 arranged between the heating elements 31 in series, and the heating elements 31. It is composed of a heat insulating material 34 covering the outer periphery and a storage case (not shown).

A plurality of heating elements 31 are connected in series to have a total length of about 1 meter and are composed of a base 31a, an enclosure 31b, and a heating wire 31c.

The substrate 31a is made of silicon dioxide (SiO ₂ ),
A cylindrical body having a thickness of several millimeters, which is made of a ceramic molded body having high thermal efficiency such as aluminum oxide (Al ₂ O ₃ ). The cross section of the base 31a is generally circular, but may be flat as shown in FIG. 8 (1). In that case, the distance from the wall surface of the heater is small even if the yarn Y is on the axis of the heater or away from the axis, so that the thermal efficiency is very good.

The envelope body 31b is also formed of the same ceramic body as the base body 31a, but has a much higher porosity than the base body 31a, and therefore has a very high heat insulating property.

The heating wire 31c is made of a nichrome wire or a kanthal wire and can raise the temperature of the yarn running space 32 to 300 to 700 ° C.

At the center of the tip of each balloon stop guide 33, a slit 33a for guiding the yarn Y is formed by a ceramic member. This balloon stop guide 3
3 are arranged at the inlet and outlet of each heating element 31. Also,
Each balloon stopping guide 33 is fixed to a rod 35 arranged along the axis outside the storage case. Two or three of the rods 35 are arranged around the storage case. Therefore, the respective balloon stop guides 33, when the yarn is traveling, are provided with slits 3 of each other as shown in FIGS. 5 (2) and 5 (3).
3a is butted and the yarn path is regulated. Further, the rods 35 can approach and separate from each other in parallel with the axis of the heater, and the balloon stopping guides 33 can be retracted to the outside of the heater during threading or the like. Therefore, threading becomes easy.

By arranging the balloon stopper guide 33 so that the slits 33a are abutted at the entrance and the exit of each heating element 31, a large tension is not applied to the yarn Y and the yarn path is limited without the balloon. You can run straight without. Therefore, since it is not necessary to arrange the balloon stopper guide 33 in a bow shape, the inner diameter of the heating element 31 can be reduced, and the overall size can be reduced, which can greatly contribute to energy saving. Moreover, the temperature stability becomes high, the influence of the accompanying flow can be made very small, and the production is easy.

Further, each heating element 31 is provided with an auxiliary nozzle 36 in the heater for ejecting air B in the yarn advancing direction at the time of threading which will be described later. As shown in FIG. 2, the auxiliary nozzle 36 in the heater may be provided below the heating element 31, and as shown in FIG. 4, the auxiliary nozzle 36 may be placed above, below, left, and right of the heating element 31 via the air reservoir 36a. It can also be made to squirt. When the air B is blown out from the auxiliary nozzle 36 in the heater during threading, the thread Y can pass smoothly without contacting the heater wall surface. Further, the air B blown out from the auxiliary nozzle 36 in the heater also contributes to the cooling of the heating element 31, so that the threading success rate is further improved.

Next, referring to FIGS. 2 and 6 to 10,
The threading device [A] will be described.

This threading device [A] is used for the yarn supplying package 2
The straight pipe 9 for transporting the yarn Y to be unraveled on the air flow, the slit pipe 10 connected to the outlet side thereof for guiding the yarn Y to the inlet side of the heater 3, and the slit pipe 10 provided at the downstream end thereof It is composed of a nozzle cover 11.

The heater 3 in which the threading device [A] is installed has a slit pipe 10 which will be described later at the time of threading.
Nip roller 12 which moves backward from the yarn path immediately below and advances to the yarn path after threading, rotates freely, twisting tensor roller 13 and threading failure thread does not wind around nip roller 12. Suction device 1
4 and are arranged. Further, a guide 15 made of ceramic is provided between the straight pipe 9 and the slit pipe 10 and at a lower position deviated from the yarn path at the entrance of the heater 3, respectively.
16 are arranged. Reference numeral 17 is a smoke exhaust pipe for smoke emitted from the heater 3 due to the attachment of cutting threads or the like.

The straight pipe 9 is a straight tube whose main portion has a thread passage, and a ceramic guide 9a is attached to the inlet. A yarn blowing nozzle 9b is provided on the upstream side of the yarn passage, and an auxiliary nozzle 9c is provided on the downstream side.
Are opened so that the yarn advancing direction is directed. At the time of threading, the air A is ejected from each of the nozzles 9b and 9c, the air Y ejected from the former is unwound from the yarn supply package 2 and blown up, and the air A ejected from the latter, Stretched and slit pipe 10
Sent to.

The slit pipe 10 is bent in a U-shape so as to extend to the inlet of the heater 3 following the guide 15 at the outlet of the straight pipe 9, and inside the bend, that is, downwardly along the axis. As shown in FIG.
The slit 10a is formed. FIG. 6 (2) shows a slit pipe spirally wound, and in this case, the nozzle 10b from which the air A is jetted is provided on the downstream side.
The inner wall may be opened tangentially and in the yarn advancing direction. The wound slit pipe 10 can be effectively used without leaking air, and only the yarn Y can be let out from the slit 10a.

The nozzle cover 11 is a slit pipe 10.
Similar to the above, it is a tubular body having a slit formed downward along the axis, and at its downstream end, air b is ejected toward the inlet of the heater 3 to create a flow of air in the heater 3. A transfer nozzle 11a is provided. Further, the nozzle cover 11 has a slit pipe 10 as shown in FIG.
By the air cylinder 11b installed at the downstream end of the yarn, it approaches the inlet of the heater 3 during threading, and does not hinder the smoke exhausted by the smoke exhaust pipe 17 after threading and retracts to a position where the thread skipping nozzle 11a is not polluted. You can

By providing the nozzle cover 11 with such a yarn skipping nozzle 11a, each of the 9 nozzles 9
The flow of the yarn ejection air A ejected from b and 9c can be stabilized and the yarn can be reliably conveyed.

There are various modes of the yarn skipping nozzle 11a shown in FIGS. 8 and 9. That is, the one shown in FIG. 8A is one on the nozzle cover 11, and is suitable for the flat heater. 8 (2) is the nozzle cover 1
There are several tubes surrounding 1 and a stable air flow can be obtained. The nozzle cover 11 shown in FIG.
One is provided so as to surround the, and a more stable air flow can be obtained. In the case of FIG. 9 (1), there is one in the nozzle cover 11, and strong air can be made to flow to the axis of the heater. 9 (2) corresponds to FIG.
Each of the yarn skipping nozzles 11a of (2) is further narrowed at the end, which is also similar to that of FIG. 9 (1).

Further, as shown in FIG. 10, the yarn skipping nozzle 11a can be fixed to the slit pipe 10 so as not to move. In this case as well, even if the slit pipe 10 is long due to the positional relationship between the yarn supplying package 2 and the heater 3, the yarn skipping nozzle 11a is provided, so that the yarn can be stably and stably fed in the heater 3. You can fly. In this case, it is necessary to install the yarn skipping nozzle 11a away from the smoke exhaust pipe 17 so that the smoke exhausting of the smoke exhaust pipe 17 is not hindered and the yarn skipping nozzle 11a is not polluted.

In the above-mentioned structure, the yarn Y drawn from the yarn supplying package 2 set on the creel stand at the time of thread setting or thread breakage at the start of operation,
The hand sucker 18 is guided to the entrance of the straight pipe 9, while the hand sucker 18 is made to stand by at the exit of the heater 3 in the state of air suction. Then, at the timing shown in FIG. 7, first, the air A is jetted to the yarn skipping nozzle 11a and the auxiliary nozzle 36 in the heater, and also the air A to the air cylinder 11b.
Is supplied, and the nozzle cover 11 and the yarn skipping nozzle 11 are supplied.
a approaches the heater 3 inlet. Subsequently, the air A is jetted to the yarn blowing nozzle 9b and the auxiliary nozzle 9c, and the yarn Y guided to the inlet of the straight pipe 9 moves in the straight pipe 9 while being drawn from the yarn feeding package 2, and the slit pipe 10 Then, the air B ejected from the yarn skipping nozzle 11a enters the heater 3 and the air B ejected from the auxiliary nozzle 36 in the heater travels outside the heater 3.

The yarn Y thus moved to the outlet of the heater 3 travels while being sucked by the hand soccer 18 on standby. Therefore, the yarn moving to the hand sucker 18 in the heater 3 is surrounded by the air jetted from each nozzle whose temperature is lowered by adiabatic expansion and is protected, and therefore is not melted. Further, even after the supply of the air A, B is completed after being sucked by the hand soccer 18, the yarn Y runs at a high speed, so that the yarn Y does not melt.

The supply of air A and B is stopped, and the heater 3
When the threading into the inside is completed, the running thread escapes from the slit 10a of the slit pipe 10, and a predetermined threading is performed on the nip roller 12 and the tensor roller 13 which have advanced to the thread path immediately before.

[0030]

Since the present invention is configured as described above, it has the following effects.

That is, threading the heater is performed by fusing the thread,
It can be performed in a short time and easily with almost no failure such as non-passage. This becomes more reliable by providing the nozzle in the heater. At the time of threading, the balloon stopper guides of each set are separated from each other to open the thread path and facilitate threading. Furthermore, after threading, the thread escapes from the slit of the slit pipe and threading is performed in a predetermined manner, so that thread tension during threading can be reduced.

[Brief description of drawings]

FIG. 1 is a side view of a drawing false twisting machine.

FIG. 2 is a front view showing a cross section of a part of the threading device of the heater according to the present invention.

FIG. 3 is a vertical sectional view of a heater according to the present invention.

FIG. 4 is a diagram of a heating element of the heater of the present invention,
(1) is a longitudinal sectional view and (2) is a lateral sectional view.

FIG. 5 is a view regarding a balloon stop guide of the heater of the present invention, (1) is a plan view of itself, (2),
(3) is a figure which shows the use mode, respectively.

FIG. 6 is a view showing an example of a cross section of a slit pipe which constitutes the threading device of the present invention.

FIG. 7 is a diagram showing various air blowing timings in the threading device of the present invention.

FIG. 8 is a diagram showing three modes of a yarn skipping nozzle,
(A) and (b) are a view and a cross-sectional view as seen from the outlet side, respectively.

9 (a) and 9 (b) are views showing another two modes of the thread skipping nozzle, wherein (a) and (b) are a view seen from the outlet side and a cross-sectional view, respectively.

FIG. 10 is a transverse cross-sectional view of a fixed type yarn ejection nozzle.

[Explanation of symbols]

 2 Yarn supply package 3 Heater 33 Balloon stop guide 36 Auxiliary nozzle in heater 9 Straight pipe 9b Thread blowing nozzle 9c Auxiliary nozzle 10 Slit pipe 10a Slit 11 Nozzle cover 11a Thread skipping nozzle 12 Nip roller 18 Hand soccer

Claims (3)

[Claims] 1. A heater having a plurality of sets between a plurality of arranged heating elements and a balloon stopper guide arranged so as to be able to come into contact with and separate from the yarn path of the heater. 2. A heater having a nozzle for ejecting air in the yarn advancing direction during threading. 3. A straight pipe for carrying a yarn drawn from a package on an air flow for conveyance, and a straight pipe extending from its outlet to a heater inlet and spirally wound to form a slit downward along an axis and tangential to an inner wall. And a heater threading device comprising a slit pipe having a nozzle for ejecting air in the yarn advancing direction.