JP2965672B2 - Heating body for heating multi-synthetic yarn - Google Patents

Description

The present invention relates to a heating element for heating a multi-synthesis system, wherein a thread is elongated near or adjacent to a traveling surface of the heating element. The heating element is adapted to be guided substantially parallel to a longitudinal axis of the heating element, and the heating element is provided with at least one thread guide corresponding thereto, and the thread guide is provided between the thread and the heating element. It is of the type that is movable by a drive for changing the spacing in a direction substantially perpendicular to the longitudinal axis.

[Conventional technology]

A heating element of this type is attached to a drawing device, a textile machine, an air-type textile machine, particularly a false twisting device. Such a heating element is disclosed in U.S. Pat. No. 4,059,861 (Bag. 964 / USA). This known heating element is mounted on a false twist device. A thread guide is arranged corresponding to the heating element, and the thread guide guides the thread without first contacting the heating element when installing the thread, and then guides the thread while contacting the running surface of the heating element during operation. Can be done. The driving of the yarn guide is performed manually.

If the supply of electrical energy to drive the supply device is interrupted and the yarn stops, the running surface of the heating element will be soiled by the residue of the melted yarn.

[Problem of the Invention]

It is an object of the present invention to avoid fouling of the heating element by the residue of the melted yarn.

[Means for solving the problem]

This problem has been solved according to the invention in that the drive is operated in the direction of increasing the distance between the yarn and the heating element when the supply of electrical energy is interrupted.

With the features of claim 2, it is possible to avoid unacceptable changes in the thread stress when the thread is placed on and lifted by the running surface. Further, according to the constitutional requirements of claim 2, the installation work of the yarn is reduced. In particular, if the heating element has one or more highly heated running surfaces (see, for example, DE-A 37 19 050), the installation of the yarn is reduced. Even in the standby position, a predetermined amount of heat is supplied to the yarn, so that the yarn is not cooled. On the other hand, overheating or melting of the yarn that could damage the yarn is avoided.

According to the constituent features of claim 3 or 4, the operation of one or more yarn guides can be interrupted during operation. By arranging a corresponding number of yarn guides, the yarns can be maintained in a running state substantially parallel to the running surface or at a predetermined distance from the running surface over the entire length of the heating element. Can be lifted off the running surface.

According to the features of claim 5, a new type of heating element is provided in which the running yarn is guided in a zigzag manner between the running surfaces. The running surface is advantageously kept at a temperature significantly higher than the target temperature at which the yarn is to be heated.

〔Example〕

Next, the configuration of the present invention will be specifically described with reference to the embodiment shown in the drawings.

In the textile machine shown in FIG. 1, a yarn 2 is drawn from a supply bobbin 1 by a feed device 3. The yarn is then supplied via a yarn deflection guide 4 to a heater 5, a cooling rail 6 and a false twister 8, from which it is withdrawn by a second feed device 9. The yarn is then guided by the applicator roller 10 and applied with a suitable Avizage or conditioning liquid. Finally, the yarn is wound up on the bobbin 13. The outer periphery of the bobbin 13 is driven by the contact roller 12. The yarn is reciprocated by the switching device 11 as it is wound up. A yarn lifting guide 14 (yarn guide) is disposed in front of the heater 5.

The heating element is an elongated structure having a number of structural parts. In each configuration, the yarn is guided substantially parallel to the longitudinal axis of the heating element such that at least a portion of the length of the yarn contacts the heating element during actuation.

In order to bring the yarn into contact with the heating element, the heating element has a running surface over its entire length, through which the yarn is guided and which is slightly curved, Are better contacted. This structure is shown in particular in FIG.
In the specification. In this structure, the yarn lifting guide 14 is movable in a direction substantially perpendicular to the running surface of the heating element so that the yarn contacts the running surface at the driving position and is guided without contacting the heating surface at the standby position. is there.

In the heating element of another structure shown in FIGS. 2 and 3, a large number of webs are successively connected to the heating element 5 in the longitudinal direction.
30 has been fixed. Each of these webs 30 has an edge on the opposite side of the heating element 5 to form a running surface for the yarn, respectively. In this case, the thread lifting guide 14
Is movable in a direction substantially perpendicular to the edge of the web 30 forming the running surface. Further, a yarn lifting guide may be provided between the webs 30. In this case, the heating element has flat surfaces on which the web 30 is arranged. These webs 30 have an uneven height so that the yarn is guided along a curved line. As another possibility, the webs 30 may be fixed to the curved surface of the heating element and have the same height as one another.

The manner in which the yarn lifting guide 14 is driven and fixed is schematically shown in FIG. 2 and 3 show details thereof. 2 and 3 and the description given in connection therewith also apply to the embodiment of FIGS. 4 and 5.

As shown in FIG. 1, drive motors 22, 23, 24 for driving the supply devices 3, 9 and the contact roller 12 are provided. The rotational speed ratio of these motors is adjusted via frequency converters 19, 20, 21. The guide speed is controlled via a frequency converter 18 to which another frequency converter is connected. An energy source 16 activates a magnet 15, which holds the yarn lifting guide 14 in its operating position. A yarn monitoring device 17 is interposed in the connection line between the energy source 16 and the magnet 15. This yarn monitoring device 17
This switch is operated when the thread is connected. When the thread breaks, the switch is opened by the spring force and the magnet 15 is turned off. As a result, the thread lifting guide 14 is brought to its standby position by the spring force of the spring 7.

 Next, the driving format will be described.

When trying to install the thread, all drive motors
The yarns 22, 23 and 24 are driven, and the yarn is installed in the supply devices 3 and 9, at which time the yarn is drawn out by a suction gun (not shown). Since the yarn lifting guide 14 is still at the standby position, the yarn does not contact the running surface of the heating element 5. When the yarn is passed between the supply device 9 and the contact roller 12, the yarn is also brought into contact with the yarn monitoring device 17. As a result, the switch of the yarn monitoring device 17 is closed, and the magnet is activated.
This brings the yarn lifting guide 14 to its driving position. Now, when the current supply from the energy source 16 is interrupted, the supply devices 3, 9 and the winding device are stopped, but at the same time, the magnet 26 is turned off and the spring 27 is turned on by the yarn lifting guide.
Push 14 to its standby position. Since the yarn thus drawn is guided without running into contact with the heating element 5, there is no danger of the yarn melting.

If the yarn breaks for any reason during normal operation, the yarn monitoring device 17 is turned off. Thereby, the switch of the current circuit of the magnet 26 is opened. This also prevents the yarn still being supplied by the supply devices 3 and 9 from being guided in contact with the heating element 5.

As shown in detail in FIGS. 2 and 3, the heating element 5 is heated by a heating member 34 by electric resistance.
The web 30 is fixed to the heating element, and these webs
30 has one groove for guiding the yarn. The bottom of the groove forms the running surface for the yarn. Numerous webs 30
Are provided one after the other with an interval therebetween. The heating element 5 provided with the web 30 is circularly surrounded by an insulating member 28. The insulating member 28 forms a narrow gap 31 on the running surface of the web 30. This gap 31
Is closed by a lid 32 made of an insulating member during operation. One thread lifting guide 14 is provided in each of a number of intermediate chambers formed between the webs. These thread lifting guides 14 are fixed to a U-shaped member 25. This U-shaped member 25 is pivotable about an axis 35. This U-shaped member 25 is held in its operating position by a drive 15 with a magnet 26. In this operating device, the yarn guide member of the yarn lifting guide is located between the webs and enters the running surface of the web downward. Therefore, the yarn is guided without contacting the yarn lifting guide 14 at the handle position. When the magnet 26 is turned off, the U-shaped member 25 is pivoted by the spring force of the spring 27 to such an extent that the yarn is lifted from the running surface of the web 30 and moves away from the heating element 5 until it enters the gap 31. The yarn is thus guided in the gap 31. This has the advantage that the yarn is not exposed to temperatures that damage the yarn. Thus, the yarn can remain in the standby position without being melted. On the other hand, the yarn can maintain a temperature at which the process can be restarted without breaking. Reference numeral 33 denotes a hand lever, and this hand lever is
33 allows the U-shaped member 25 to be manually swiveled. This allows the thread lifting guide 14 to be brought to its operating position or its lifting position independently of the operating state of the machine. The device according to the invention has a running surface,
It is particularly useful when the thermoplastic yarn has a temperature above 250 ° C. where it melts.

In another embodiment of FIGS. 4 and 5, a front view and a sectional view of a heating element in which a yarn lifting guide is movable in parallel to a running surface are shown. The heating element has a longitudinally extending groove 38 on its upper surface. A number of plate-shaped webs 30 are inserted into the grooves. These webs 30 have slits 36, which are perpendicular to the longitudinal direction of the heating element. The slits 36 in the continuous web are slightly offset from the longitudinal center plane 39 of the groove alternately in one and the other direction. The side face 35 '(edge) directed towards the longitudinal center plane 39 therefore forms a running surface for the yarn 2 guided in the slit, which runs the yarn in the longitudinal direction of the heating element. Guides the deflection in a zigzag pattern. Fork-shaped thread lifting guides 14 are arranged before and after the heating element, respectively.
14 is provided with two parallel guide edges extending perpendicularly to the slit 36 above and below the running yarn. The thread lifting guide 14 is movable parallel to an edge or running surface formed by the side surface 35 '. Thread lifting guide 14
Is a magnet (electromagnet) activated in the operating position shown
Held by 26. When the current supply is interrupted, each yarn lifting guide is driven by the spring force of the spring 27 on the running surface (side surface).
Parallel to 35 '), thread and side 3 in the non-working position shown
It is moved until contact with 5 'is released. For this purpose, each slit 36 formed in the web 30 is provided with a funnel-shaped opening at its starting end. The funnel-shaped openings overlap one another such that a free space is formed in which the thread can be guided linearly without contacting the sides of the slit 36 in the non-working position shown. In this non-working position, the lid 32 of the heating element is kept closed, especially if short-term interruptions of the current supply have to be taken into account. In this case, in particular, it is possible to automatically return the thread to its operating position when the current is resupplied.

[Brief description of the drawings]

1 is a schematic sectional view of a working position of a false twister according to one embodiment of the present invention, FIG. 2 is an enlarged partial longitudinal sectional view of a heating body having a yarn guide, and FIG. 3 is another embodiment. FIGS. 4 and 5 are enlarged partial sectional views of a yarn guide according to an example, and FIGS. 1 ... supply bobbin, 2 ... thread, 3 ... supply device, 4 ...
Yarn deflection guide, 5 ... heating element, 6 ... cooling rail, 8 ...
... false twister, 9 ... supply device, 10 ... coating roller, 11 ...
... Switching device, 12 ... Contact roller, 13 ... Bobbin, 14 ...
... Yarn lifting guide, 15 ... Driver, 16 ... Energy source, 17 ... Yarn monitor, 18,19,20 ... Frequency converter, 2
2, 23, 24 ... drive motor, 25 ... V-shaped member, 26 ... magnet, 27 ... spring, 28 ... insulating member, 29 ... heating element, 30 ...
... Web, 31 ... Gap, 32 ... Lid, 33 ... Hand lever, 34 ... Heating member, 35 ... Shaft, 35 '... Side, 36 ...
… Slit, 38… Groove, 39 …… Longitudinal center plane

Claims (8)

(57) [Claims] 1. A heating element for heating a multi-synthesis system, wherein a yarn (2) is placed near a running surface of a heating element (5) or while being in contact with the running surface to a longitudinal axis of an elongated heating element. The heating element (5) is provided with at least one yarn guide (14) corresponding to the heating element (5). Of a type which is movable by means of a drive (15) for changing the distance between it and the body (5) in a direction substantially perpendicular to the longitudinal axis of the heating body (5), said drive (15)
A heating element for heating a multi-composite yarn, wherein the heating element is operated in a direction to increase a distance between the yarn (2) and the heating element (5) when the supply of electric energy is interrupted. . 2. A heating element (5) comprising a heating element and / or an insulation element extending along said heating element (5) to form a narrow gap (31), wherein said thread guide (14) is An operating position where the yarn (2) is guided while contacting the heating element (5) and a standby position where the thread (2) is guided without contacting the heating element (5) in the gap (31). The heating element according to claim 1, wherein the heating element is movable between and. 3. A heating element (5) having a running surface extending over its entire length, and two yarns arranged before and after the heating element and movable in a direction perpendicular to the running surface. Guide (14)
The heating element according to claim 1, wherein the heating element is used. 4. A heating element (5) having two or more webs (30) fixed to a heating element (5), each of which is spaced apart from each other. On the opposite side to the running surface for the yarn (2), and a plurality of yarn guides (14) at the operating position of the web (3
The heating element according to claim 1, wherein the heating element is positioned before and / or after 0) and below the running surface. 5. Two or more webs (30) are fixed to said elongated heating element (5), each of said webs (30) being spaced apart from one another, said webs (30). ), The edge of the running-guided yarn (2), which projects substantially perpendicularly from the heating element (5), is slightly offset in one direction and in the local direction with respect to the yarn path, Thereby, this edge forms a running surface for the yarn (2), between which the yarn (2) is guided in a zigzag manner, and a plurality of yarn guides (14) Are arranged before and / or behind the heating element (5) and / or between the webs (30), the thread guides (14) being parallel to the edge forming the running surface. The heating element according to claim 1, wherein the heating element is movable. 6. The running surface of the heating element (5) is in normal operation,
The heating element according to claim 1, wherein the heating element has a temperature higher than 250C. 7. An electromagnet (5) in which the drive device (15) abuts the yarn (2) on the running surface of the heating element (5) via a yarn guide (14) against the action of a spring (27). The heating element according to claim 1, wherein the heating element is (26). 8. The heating element according to claim 7, wherein the drive device is connected to the energy source via a switch which is opened to avoid tensioning of the yarn.