EP0591825B1 - Method and apparatus for processing at least two synthetic yarn running side by side distanced apart on a textile machine - Google Patents

Description

The invention relates to a method and a device for processing at least two synthetic threads running at a distance from one another in a textile machine, the threads being passed through at least two successive processing stations, the processing surfaces of which are at an angle to one another (see for example FR-A-2 426 756).

It already belongs to the generally known state of the art, e.g. to let two synthetic threads run "bifilar", for example in stretch texturing machines. The two threads run close together, but separated by processing stations of a textile machine. By using bifilar threads, production can be doubled compared to a machine with monofilament operation.

A process for producing a bulged, drawn polymer yarn is already known, in which undrawn multifilament yarn made of a polymer is drawn in a drafting device and then twisted by false twisting is swapped. Here the threads run continuously in the same running plane, which is determined by the processing areas, such as the circumference of the delivery rollers or godets.

However, the prior art also includes constructions in which, for example, rotating elements with axes of rotation are used which lie in mutually perpendicular planes, such as, for example, delivery rollers and godets. The problem thus arises of also rotating the running plane of the threads running next to one another.

Accordingly, the present invention has for its object to provide a method and an apparatus of the type mentioned, which or which ensures in a simple manner that the threads in successive processing stations, the processing surfaces are at an angle to each other, run at a designated distance .

This object is achieved in that the threads between the processing stations are guided with a positive retention of a distance from a first running level of the processing station passed through to a second running level of the processing station to be passed. This has the advantage that the running levels of threads running next to each other, e.g. bifilar running threads, the processing surfaces of the processing stations are adapted, even if these processing surfaces are at an angle to each other. In this way, the necessary joint laying of the two threads is made considerably easier and a considerable improvement in quality is also achieved.

In a further embodiment of the invention, the running planes of the threads lie at an angle of 90 ° to one another, the threads running next to one another being rotated in a positive manner by this angular amount.

• n der Anzahl der bearbeiteten Flächen entspricht,
• das jeweilige Fadentrennelement in dem beabsichtigten Abstand der Fäden auf der Bearbeitungsfläche der nachgeordneten Bearbeitungsstation angeordnet ist.

The device for carrying out the method according to the invention is characterized by
(n-1) vertical thread separating elements on the processing surface of a downstream processing station, where

• n corresponds to the number of worked areas,
• the respective thread separating element is arranged at the intended spacing of the threads on the processing surface of the downstream processing station.

According to the invention it is proposed to arrange at least one thread separating element in the area between two processing stations, the diameter of which corresponds to the desired spacing of the threads in this plane, the threads running over opposite sides of the thread separating element.

A pin for guiding a thread between two processing stations is already part of the prior art (DE-OS 19 47 452). However, this pin serves as a guide device, which is arranged between a roller and a heating plate, over which a thread is drawn. The leading edge of this guide device has a special inclination with respect to the traversing direction of the thread. This known pin thus has a completely different function than the thread separating elements according to the invention.

In a further embodiment of the invention, the outer diameter of the thread separating element corresponds to the desired distance of the threads running side by side in the second running plane. This thread separating element has a first region of constant diameter and a second region in the form of a conically tapering tip to increase the distance between two threads placed at the tip and guided to the first region and running closely next to one another on the outside diameter of the Thread separation element corresponding distance. The axis of this tip is angled relative to the axis of the first area of the thread separating element; the tip of the thread separating element can have a nose.

Due to this special design of the thread separating element, a second function is assigned to it, namely separating threads running next to one another at a certain distance when placing a pair of threads with the aid of a suction gun, which detects the threads together when gripped.

Such a thread separating element can therefore be used advantageously not only where it is technically necessary to change the running plane, but also where it facilitates the manipulation of threads running alongside one another when pulling in.

The two threads can be put together on the nose in the area of the tip of the thread separating element. This nose jumps e.g. one of the two threads, preferably the thread deflected by a larger angle, whereby the separation of the two threads from each other is facilitated.

In the case of a device with a delivery roller, a drawing pin and a godet, which are arranged along the thread path of a stretching machine for synthetic threads, the thread separating element is advantageously arranged in the thread path of the parallel threads of the godet.

To fulfill the aforementioned second function, at least one thread separating element can be arranged upstream of a guiding device guiding the adjacent threads or a processing station of the textile machine.

Instead of several, one behind the other, thread separating elements there is also the possibility according to the invention that a cross between the swirling chamber and the second pair of thread guides to the thread running direction are arranged thread separating element, which in an outer dividing area from a point has diverging edges for each of the threads running side by side, which merge into an inner insertion area in parallel. This results in a simplification in the construction of the elements for producing a thread course lying next to one another when a pair of threads is placed on it.

The invention can advantageously also be used for guiding more than two threads running in parallel, at least two thread-separating elements being arranged upstream of a processing station or a guiding device. Here, the two thread separating elements can be arranged offset in relation to one another in the thread running direction and transversely thereto.

Fig. 1

eine schematische Vorderansicht einer Arbeitstelle einer Strecktexturierspulmaschine;

Fig. 2

eine schematische Ansicht in Pfeilrichtung A nach Fig. 1 mit den Verfahrensschritten a, b und c;

Fig. 3

eine schematische Ansicht in Pfeilrichtung B nach Fig. 1 mit den identischen Verfahrensschritten a, b, c nach Fig. 2;

Fig. 4

eine Ansicht ähnlich nach Fig. 3 mit den Verfahrensschritten a, b, c und d bei der Verarbeitung von drei synthetischen Fäden;

Fig. 5

eine Vorderansicht einer anderen Ausführungsform einer Arbeitsstelle einer Streckspulmaschine für synthetische Fäden;

Fig. 6

eine Detailansicht im Bereich der oberen Verlegerrolle mit den Verfahrensschritten a bis f;

Fig. 7

eine Draufsicht auf die oberen Fadenführer;

Fig. 8

eine Draufsicht auf die unteren Fadenführer und das Fadentrennelement;

Fig. 9

eine Gesamtdraufsicht der Teile nach Fig. 7 und Fig. 8;

Fig. 10

eine Draufsicht auf ein Fadentrennelement mit Nase;

Fig. 11

eine Ansicht auf das Fadentrennelement nach Fig. 10 in Richtung A.

The invention is described below with reference to exemplary embodiments shown in the drawing. The drawing shows:

Fig. 1

is a schematic front view of a work station of a stretch texturing machine;

Fig. 2

a schematic view in the direction of arrow A of Figure 1 with the steps a, b and c;

Fig. 3

a schematic view in the direction of arrow B of Figure 1 with the identical process steps a, b, c of Fig. 2.

Fig. 4

a view similar to Figure 3 with the process steps a, b, c and d in the processing of three synthetic threads.

Fig. 5

a front view of another embodiment of a job of a stretch winding machine for synthetic threads;

Fig. 6

a detailed view in the area of the upper laying roll with the process steps a to f;

Fig. 7

a plan view of the upper thread guide;

Fig. 8

a plan view of the lower thread guide and the thread separating element;

Fig. 9

an overall plan view of the parts of Fig. 7 and Fig. 8;

Fig. 10

a plan view of a thread separating element with a nose;

Fig. 11

a view of the thread separating element of FIG. 10 in the direction A.

1 shows a front view of a work station of a stretch winder 1 for two synthetic threads 2 and 3 to be treated bifilarly. As can be seen, the threads 2 and 3 are fed to the individual processing stations of this work station from a creel (not shown).

These synthetic threads 2 and 3 initially run side by side over a rod-shaped thread guide 5, which has profiles on its outer circumference for separating the threads 2 and 3. The threads are guided several times around the thread guide 5 and a pressure roller 6 resting on a delivery roller 7 and run from there to a stretching pin 8.

A lower godet 9, for example a heating godet, is arranged downstream of this stretching pin 8, above which a laying roller 10 is located.

The synthetic threads 2 and 3 running from the godet 9 next to one another are then passed on to a godet 12 arranged in the upper region. This godet is in turn equipped with a laying roller 13. The peripheral speed of the godet 12 is increased compared to the peripheral speed of the godet 9, so that the synthetic threads 2 and 3 are stretched. The zone between the godets 9 and 12 forms the main delay field.

In the area of this main drafting zone, a heating device 11 is installed, the two synthetic threads 2 and 3 passing through the heating device 11 side by side from bottom to top. The upper godet 12 can either be a heating godet or an unheated godet.

After leaving the godet 12, the two synthetic threads 2 and 3 are guided via a pair of thread guides 14 and 14 'to a two-lane swirling chamber 15 and from there via a further pair of thread guides 16, 16' and 17 to a winding device with the two bobbins 18 and 19 for each of the synthetic threads 2 and 3. (For reasons of clarity, the second thread guide of the pair 17 is not shown in FIG. 1).

The two bifilar treated synthetic threads 2 and 3 run side by side over wide areas in a plane which is determined by the processing surfaces, such as the circumference of the delivery roller 7, the godets 9 and 12, the heating surface of the heating device 11.

In this context, it can be seen from FIG. 1 that the axes of rotation of the delivery roller 7 and the stretching pin 8 lie in a plane which is arranged perpendicular to the plane in which the axes of rotation of the laying roller 10 and the godet 9 lie.

According to this change in the planes of the processing surfaces, the running plane of the synthetic threads 2 and 3 running next to one another is also rotated in this area between the stretching pin 8 and the godet 9.

For this purpose, a thread separating element 20 is used, with the aid of which the running plane of the two synthetic threads 2 and 3 running next to one another is rotated into the plane of the subsequent processing surface. This thread separating element can e.g. a pin, a wire bracket or a divider.

1, the axis of the thread separating element 20 is perpendicular to the desired running plane of the two threads 2 and 3. In addition, the diameter of the outer circumference of the thread separating element 20 corresponds to the desired distance of the two threads 2 and 3 running next to one another in this plane . 2 and 3 show that the thread 3 runs in front of the thread separating element 20 and the thread 2 runs behind the thread separating element 20.

By using such a thread separating element it is possible that e.g. bifilar threads 2 and 3 are guided in a form-fitting manner while maintaining a distance from a first running level of the processing station being passed through to a second running level of the processing station to be passed through.

2, the thread separating element 20 has two areas, namely a cylindrical first area 21 and then a second area 22 in the form of a tapered tip 22. The axis of the tip 22 is approximately 45 ° to 75 ° with respect to the axis of the first region 21 of the thread separating element 20 angled.

In addition to the function for rotating the running plane of the two bifilar threads 2 and 3, the thread separating element 20 exercises with its tip 22 and its cylindrical region 21 perform a further function: when a pair of threads is placed on, this thread separating element 20 makes it easier to reload the individual processing stations while the machine is running.

This mode of operation is shown in FIG. 2 in individual process steps: In this case, a suction nozzle 23 of a suction gun, not shown, is used to guide a pair of threads. 2a, the two threads 2 and 3 are sucked into the mouthpiece of the suction nozzle 23. The suction nozzle is located in front of the godet 9.

Now the suction nozzle 23 is guided so that the pair of threads 2, 3 reaches the tip 22 of the thread separating element 20. The two threads 2 and 3 are guided over the tip 22, separated from one another, onto the two sides of the cylindrical region 21.

Here, the tip 22 according to FIGS. 10 and 11 can be provided with a nose 40. There is a recess 41 in front of the nose 40. On this thread separating element 20 designed in this way, the two threads 2 and 3 are not moved to the tip 22, but into the recess 41. Then the suction nozzle 31 according to FIGS Direction of arrow x led. The more deflected thread 2 jumps over the nose 40 rather than the other thread 3 and can then be guided more easily behind the thread separating element 20.

Thus, despite the common holding of the two bifilar threads 2 and 3 in the suction nozzle 23 according to FIG. 2b, a perfect separation by the tip and the outer diameter of the thread separating element 20 or by means of the nose 40 takes place.

2c, the suction gun is repeatedly guided around the godet 9 and the laying roller 10, the two in front of and behind the cylindrical region 21 of the thread separating element 20 threads 2 and 3 running side by side experience a parallel guidance with a constant mutual distance from one another.

As a result, this thread separating element 20 fulfills the further function mentioned above, namely the production of the desired distance when placing a pair of threads.

FIG. 3 shows the process sequence shown in FIGS. 2a to 2c in the direction of arrow B. Here, the effect of the conical tip 22 can be clearly seen, with the thread 3 on one side and the thread 2 on the other side according to FIG. 3b of the outer diameter of the cylindrical region 21 of the thread separating element 20. Fig. 3c corresponds to the position according to Fig. 2c, i.e. the parallelism of the two threads 2 and 3 is established.

4 there is also the possibility of driving not only bifilar but also trifilar, i.e. to ensure that three threads 2, 3 and 30 run side by side: If a trio of threads is to be placed, the three threads are in turn held by the suction nozzle 23 of the suction gun.

Now the three threads 2, 3, 30 are first guided into the area of the thread separating element 20, where a separation into a thread 3 and into the two threads 2 and 30 is initiated.

The two remaining threads 2 and 30 are in turn in the range of e.g. diagonally below the first thread separating element 20 arranged second thread separating element 20 ', where a separation between the two threads 2 and 30 is effected. This position is shown in Fig. 4c.

After separation of the three threads 2, 3 and 30 in parallel running planes, the suction nozzle 23 of the suction pistol is guided several times around the godet 9 and the laying roller 10 according to FIG. 4d and so the required parallelism of the three threads 2, 3 and 30 is produced in this area.

As a result of the functions of the thread separating element 20 - separating and separating - the bi- or trifilar running synthetic threads when placing a pair of threads or trio of threads, there is also the possibility of using thread separating elements of this type in other areas of the textile machine:

5 shows an exemplary embodiment for this: As can be seen, there are further thread separating elements 25, 26 and 27 in the area below the upper godet 12. Here, the thread separating element 25 is arranged between the upper godet 12 and a first pair of thread guides 14 and 14 ', a second Thread separating element 26 is located between this first pair of thread guides 14 and 14 'and the two-track swirl chamber 15; a third thread separating element 27 is arranged between this swirling chamber 15 and a further pair of thread guides 16 and 16 '.

The two bifilar treated threads 2 and 3 then run via a third pair of thread guides 17 and 17 'to the two bobbins 18 and 19.

When placing a pair of threads directly behind the godet 12 by the thread separating element 25, the two threads 2 and 3 held by the suction nozzle 23 of the suction gun are separated and only then the one thread 2 is inserted into the one thread guide 14, the other thread 3 temporarily, so to speak, behind the thread separating element 25 is “deposited” and then inserted into the other thread guide 14 ′.

When inserting a pair of threads under the upper godet 12 or the laying roller 13, the two threads 2 and 3 are first gripped and held together by the suction nozzle 23 of the suction gun according to FIG. 6a. Both threads are in the Area of the thread separating element 25 guided, the thread 3 being guided behind the thread separating element 25 according to FIG. 6b, so that the thread 2 can be moved freely and can be guided into the thread guide 14 according to FIG. 6c.

6d, the suction nozzle 23 is now moved from right to left, so that the thread 3 also enters the thread guide 14 'and is held there.

The function of the further thread separating element 26 is analogous, in order to ensure that the two threads are correctly inserted into the two parallel grooves of the two-lane swirl chamber 15.

The same function results behind the swirling chamber 15, with the help of a further thread separating element 27 first introducing the one thread 2 into the one thread guide 16 and then introducing the other thread 3 into the other thread guide 16 'through the suction nozzle of the suction gun .

These thread separating elements are exposed after insertion in the respective thread guides.

A further possibility when inserting a pair of threads is shown in FIG. 6 in method steps d-f: as can be seen, behind the laying roller 13 there is a thread separating element 25. The two-lane swirling chamber 15 with the two grooves 28 and 29 is followed by a differently designed thread separating element 33 , which is transverse to the thread running direction.

According to FIG. 8, this thread separating element 33 has an outer dividing area 34 with edges running apart from a point for each of the threads running side by side and an inner insertion area with a spacing from one another lying edges 35 and 35 '. Furthermore, the upper thread guides 14 and 14 'according to FIG. 7 are open to the outside, whereas the lower thread guides 16 and 16' according to FIG. 8 are designed to be open towards the inside. Fig. 9 shows the elements of FIGS. 7 and 8 in an overall plan view. Instead of designing the thread separating element 33 in the form of a partial sheet, a wire bracket with corresponding edges can also be used.

To insert a pair of threads into the grooves 28 and 29 of the swirling chamber 15, the suction nozzle 23 is moved downward according to FIG. 6d and guided under the thread separating element 33 against the base of the partial sheet. This causes the two threads 2 and 3 to spread in the outer dividing area 34 until they abut the parallel edges 35 and 35 'of the inner insertion area and are therefore inevitably inserted into the grooves 28 and 29 of the swirling chamber 15.

As can be seen, the distance between the edges 35 and 35 'is selected such that they guide the threads 2 and 3 in cooperation with the thread guides 14, 14' exactly in the two grooves 28 and 29 of the swirling chamber 15.

FIG. 9 shows a top view of the area of the swirling chamber 15 at the moment in which the threads 2, 3 are inserted into the two grooves 28 and 29 of the swirling chamber 15 by means of the suction gun via the partial sheet 33.

6f, the suction nozzle 23 is then moved to the left until the thread 2 is embedded in the thread guide 16; by moving to the right, the thread 3 is embedded in the thread guide 16 '.

Here, too, the other thread is held by one of the edges 35 and 35 'in a position in which it does not hinder the handling of the thread moving with the suction nozzle.

Due to this construction with the interaction of the one thread separating element 25 and the specially designed other thread separating element 33, the two thread separating elements 26 and 27 according to FIG. 5 can be omitted, whereby nevertheless a perfectly functional positioning of the two threads 2 and 3 running next to one another in the thread guides or respectively further processing stations is guaranteed.

According to the invention, the running plane of the e.g. bifilar threads 2 and 3 are rotated, the special design of the thread separating element or elements also simplifying the placement of a pair of threads or trio of threads.

The invention is e.g. applicable to stretch texturing machines with bifilar threads. However, the use of such thread separating elements is not limited to a draw texturing machine, but can also be used on draw twine or draw winder without texturing or on machines with a different type of texturing, such as false twist.

Claims (15)

1. Method for processing at least two synthetic yarns (2, 3) running at a distance next to one another in a textile machine, the yarns being guided through at least two successive processing stations (8, 9), the processing surfaces of which are at an angle to one another, characterized in that the yarns (2, 3), a distance between them being positively maintained, are guided between the processing stations (8, 9) out of a first running plane of the processing station (8) passed through into a second running plane of the processing station (9) to be passed through.
2. Method according to Claim 1, characterized in that the running planes of the yarns (2, 3) are at an angle of 90° to one another, and in that the yarns (2, 3) running next to one another are positively rotated by this angular amount.
3. Apparatus for carrying out the method according to Claim 1 or 2, for processing at least two synthetic yarns (2, 3) running at a distance next to one another in a textile machine, the yarns being guided through at least two successive processing stations (8, 9), the processing surfaces of which are at an angle to one another, characterized by (n - 1) yarn-separating elements (20, 20') perpendicular to the processing surface of a following processing station, n corresponding to the number of processed yarns (2, 3, 30), and the respective yarn-separating element (20, 20') being arranged, with the intended distance between the yarns (2, 3, 30), on the processing surface of the following processing station (8, 9).
4. Apparatus according to Claim 3, characterized in that the outside diameter of the yarn-separating element (20, 20') corresponds to desired distance between the yarns (2, 3, 30), running next to one another, in the second running plane, and the yarns (2, 3) run in each case over opposite sides of the yarn-separating elements (20; 20').
5. Apparatus according to one of the preceding claims, characterized in that the yarn-separating element (20) has a first region (21) of constant diameter and a second region in the form of a conically tapering tip (22), for the purpose of increasing the distance between two yarns (2, 3) running closely next to one another, applied at the tip (22) and guided to the first region, to the distance corresponding to the outside diameter of the yarn-separating element.
6. Apparatus according to Claim 5, characterized in that the axis of the tip (22) is angled at approximately 45° to 75° to the axis of the first region (21) of the yarn-separating element (20).
7. Apparatus according to Claims 5 and 6, characterized in that the tip (22) of the yarn-separating element (20) has a nose (40).
8. Apparatus according to one of the preceding claims, having at least one delivery roller, one drafting pin and one galette, which are arranged along the yarn run of a drafting machine for synthetic yarns, characterized in that the yarn-separating element (20) precedes the galette (9) in the yarn run of the parallel yarns.
9. Apparatus according to Claims 5 to 8, characterized in that in each case at least one yarn-separating element (25, 26, 27) precedes a guide device or a processing station of the textile machine (1), the said device or station guiding the yarns (2, 3) lying next to one another.
10. Apparatus according to Claim 9, with a first pair of yarn guides as a guide device, arranged downstream of a galette and located at a distance from one another, with a swirl chamber as a processing station, following in the yarn running direction, and with two following pairs of yarn guides on a drafting machine, characterized in that at least one yarn-separating element (25) is arranged between the galette (12) and the first yarn guide (14, 14').
11. Apparatus according to Claim 10, characterized in that at least one further yarn-separating element (26) is arranged between the first pair of yarn guides (14, 14') and the swirl chamber (15).
12. Apparatus according to Claim 10, characterized in that at least one further yarn-separating element (27) is arranged between the swirl chamber (15) and the second pair of yarn guides (16, 16').
13. Apparatus according to Claim 10, characterized in that there is arranged between the swirl chamber (15) and the second pair of yarn guides (16, 16') a yarn-separating element (33) which lies transversely to the yarn running direction and which has edges in each case for one of the yarns (2, 3) running next to one another, the said edges diverging from a tip into an outer dividing region (34) and changing to a parallel course in an inner introduction region (35, 35').
14. Apparatus according to one of the preceding claims, characterized in that, for guiding more than two yarns (2, 3, 30) running in parallel, at least two yarn-separating elements (20, 20') can precede a processing station or a guide device.
15. Apparatus according to Claim 14, characterized in that the yarn-separating elements (20, 20') are arranged so as to be offset relative to one another in the yarn running direction and transversely thereto.

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