EP0152919B1 - Apparatus for the air-entangling of several running yarns - Google Patents

Description

The invention relates to a device for air entanglement of a plurality of running threads and a nozzle bar for use in such a device.

When stretching multifilament threads made of thermoplastic materials, in particular polyamides and polyesters, polypropylene, polyethylene, the threads are advantageously subjected to air swirling before stretching or after stretching. An air jet is blown across the running thread. The geometrical displacement of individual filaments gives the filaments a certain union with one another. For this reason, this method has also been called interweaving. The process is largely known under the term “Tanglen”

When stretching sheets of such multi-filament threads, in which z. B. pulled a thousand threads from a creel, guided into a common plane and stretched together between several rollers, there is the problem of arranging a sufficient number of such nozzles before stretching or - if this is desired - also behind the stretching.

From DE-AS2611 547 a device for air swirling of such a thread group is known, in which the swirl nozzles are inserted in an airtight manner in a flat swirl housing and are jointly connected to an air source. The nozzle plate is arranged in a vertical plane so that the air nozzles are aligned horizontally. The device has the disadvantage that some threads with poor interlacing arise, but some also the qualitative homogeneity of the thread family is poor. The invention is based on the finding that the thread guide in the nozzle has a significant influence on the quality of the thread and in particular that Quality of the swirl

The invention therefore achieves the object of providing a device for air swirling for a group of threads which start up from a multiplicity of horizontal and vertical planes, by means of which essentially uniform throughput conditions can be created for each thread through the vortex nozzle.

The object is achieved by a device of the type described at the outset, which is characterized in that a plurality of nozzle bodies each provided with a plurality of vortex nozzles is provided on a common support or supporting frame, the position of which can be changed relative to one another and to the thread sheet. The nozzle bodies are advantageously designed as hollow bodies and the cavities are connected both to a compressed air source and to the blowing channels of the individual swirl nozzles of the respective nozzle body.

An advantageous embodiment is characterized by this; that the vortex nozzles are arranged in a plurality of horizontal bars and that the bars are pivotable separately from one another about a horizontal axis.

It has been found - this should be noted in advance - that the quality of the intermingling also depends to a large extent on the thread running diagonally through the vortex nozzle, as seen in the longitudinal section of the nozzle channel. The invention makes it possible to set each bar so that this requirement is met. In this case, a thread overflow rod can be arranged in front of and / or behind each bar, which extends along the bar and defines the thread path within the nozzles. These thread overflow rods can advantageously be connected to the bar and pivoted accordingly with it.

A preferred embodiment provides that the frame in which the individual nozzle bars are pivotally mounted can also be pivoted about a horizontal axis. This will. a further adjustment of the thread runs possible through the respective swirl nozzles. But in particular with this device it is also possible to ensure that the deflection of the threads as they run through the swirl nozzles is relatively small, so that the differences in the thread running length between the clamping points in front of and behind the device are also relatively small. Furthermore, the pivotability offers considerable advantages when inserting the individual threads.

The nozzle bars can be connected to a compressed air source by hoses.

A robust and structurally simple design is made possible in that the frame is formed at least one of the vertical side pieces as a hollow profile and is connected to the compressed air network, the individual beams being connected to the hollow profile, preferably being connected to the hollow profile via their hollow pivot axes . In this embodiment, external Luftansc be _h Lüsse avoided that hinder in the multitude of einzufädelnden and run threads.

The air is preferably supplied to the frame in the lower crossmember, which in this case is also designed as a hollow profile

In a particularly advantageous embodiment of the nozzle bar, it has an upward-facing, carefully plane surface on which a cover beam with a congruent, also plane surface lies.

Thread guiding grooves are machined perpendicular to the longitudinal axis of the thread in one of the two surfaces. When the top beam is lifted off, a thread can easily be inserted into each of these grooves. By covering the grooves with the cover beam, each groove forms a thread channel which is closed all around. Each groove is connected via a branch duct to an air duct which extends in the longitudinal direction of the nozzle bar and which - e.g. B. as described above - is supplied with compressed air.

The thread guide channels can, for. B. rectangular grooves, which are introduced by milling in the flat surface of the nozzle bar. This has the advantage that the cover bar does not require any further processing apart from the surface processing. However, grooves can also be made in both flat surfaces, which mesh with one another when the top beam is attached. In this way, thread channels with a circular cross-section can be produced, in particular, by firmly clamping the lower beam and the cover beam to one another and then introducing the nozzle bores in the seam area of the plane-worked surfaces. Furthermore, the grooves can also be made in the deck beam. In this case, the lower bar only has the surface machining of its surface, with branch channels opening into the air channel in this surface with the division of the grooves made in the top bar.

This construction of the nozzle bar allows the air nozzles to be sealed very closely at a distance of e.g. B. only 5 mm next to each other, so that a device for air vortex treatment of a thousand threads builds relatively small.

In an advantageous embodiment, the stitch channels are attached so that the air stream exiting into the thread channels has a movement component in the direction of conveyance of the threads. This is an advantage when the air swirling device is mounted behind the drafting device because the swirling nozzles exert a tensile force exercise the thread. In the event of a thread break in the winding area, the thread is therefore conveyed on without the broken thread having to be reinserted into the nozzle assigned to it.

In a further embodiment of the invention, a row of nozzle bodies is fastened on an essentially horizontally extending air supply bar, each nozzle body has a number of swirl nozzles, the thread channels of which run parallel to one another and whose blowing channels are connected to a common air supply. The individual vortex nozzles can be arranged in the nozzle bodies in one or more rows parallel to one another, the planes parallel to one another running essentially perpendicular to the air supply bar through the nozzle axes of the individual rows.

The individual nozzle body advantageously has at least four and preferably at least six vortex nozzles arranged with a small mutual distance between the thread channels; the distance between two adjacent thread channels is advantageously at least 1.5 mm and is at most 15 mm, and in order to reduce the row spacing when the thread channels are arranged in a plurality of parallel rows, the thread channels of adjacent rows can be arranged offset from one another.

In the case of a special form of further development, the individual nozzle body consists of a housing and a housing insert which fits into the housing and accommodates the individual vortex nozzles.

The blowing channels of the individual swirl nozzles of a nozzle body are connected to a common air supply in the nozzle body. The vortex nozzles can be arranged in the insert in up to six rows, the rows of nozzles lying in mutually parallel planes which are substantially perpendicular to the air supply bar. The air supply can take place via cavities between the insert and the inner wall of the housing and / or in the center of the insert. The insert can also consist of at least two parallel plates, each receiving one or two rows of swirl nozzles, wherein grooves can be provided as air supply for the blowing channels, which are incorporated in at least some of the plates.

In another form of training, the nozzle body is a hollow box. In its side walls lying transversely to the thread run, it contains bores for the tightly packed accommodation of insert nozzles, the ends of which are fitted into the bores of the side walls; their blow channels open into the box interior, which in turn is connected to the interior of the air supply beam.

In a special embodiment of this development of the invention, the rows of nozzles are offset from one another by half a distance between two insert nozzles lying next to one another in the same row; the individual insert nozzles are each provided with a rectangular plate on its front, the edge lengths of which are matched in such a way that the plates abut one another with essentially no space when the nozzles are fitted. If the rectangular plates are offset asymmetrically on the edges for mutual overlap, it is possible to lock all insert nozzles together using only one clamp and to align them unambiguously with regard to the position of their blowing channels during assembly.

In another particular embodiment, the nozzle bodies in their side walls lying parallel to the general thread run have bores for receiving insert nozzles which extend essentially parallel to the thread run. The holes and the use of nozzles have the length of the application nozzle reaching, starting from the side walls Einfädeischl ⁱ to Tze, while the air supply to the individual nozzle inserts via emanating from the individual holes connecting channels to the air-conducting interior of the nozzle body. It goes without saying that, in the operating position, blow channels and connecting channels correspond to one another.

The threading slots in the nozzle body can be covered by suitable means after the threads have been inserted, but the threads can also be prevented from escaping by rotating the nozzle inserts in the bores, so that the threading slots are closed. In the latter case are threading slit and Blow hole in the insert nozzle on its circumference offset such that the blowing channels in the threading position and in the working position the threading slots are covered by the bore wall.

In a further development, the individual insert nozzle consists of an outer tube which is stuck in the bore of the nozzle body with a threading slot and an inner body which can be rotated in the tube and which has provisions for thread take-up. The stuck tube also has a blowing bore that matches the connecting channel of the bore in the nozzle body. The inner body can be solid or also a tube. In one embodiment, a thread guide groove extending over its length is introduced into its outer surface and has any, but preferably rounded, cross section. In another embodiment, the inner body is an inner tube which is also provided with a threading slot. For threading, the inner body is rotated so that its thread guide groove or threading slot matches the threading slot of the nozzle body bore and possibly the fixed tube; in the working position, the thread guide groove or the inner threading slot is rotated so that it matches the blow hole or / and that A connecting channel to the interior of the nozzle body is advantageous. A device is advantageous with which the inner body of a nozzle body or a nozzle body half can be rotated together.

The air supply bar suitable for carrying the above-described nozzle body is fastened in its supporting frame in such a way that it can be rotated about its longitudinal axis in order to change the deflection angle of the threads passing through the vortex nozzles. The beam end sitting in the stand and serving as a pivot bearing can be provided with bores leading to the interior of the beam, which can be connected to the interior of the stand designed as a hollow beam; the hollow stand is provided with a fianschanschiuß for the air line, so that the vortex nozzles via the interior of the air supply bar, the holes in the stator end and the stator interior are connected to the air supply. In another embodiment, the stator end of the air supply bar is extended beyond the stator and even equipped with a flange for connecting the air supply. A particularly compact embodiment of the device according to the invention has two rows of nozzle bodies on an air supply bar which are offset from one another on their circumference by approximately 180 °.

The air supply bar with the nozzle bodies can advantageously be encased by a flat box serving as extraction for the blown air and / or as soundproofing, which extends over part of the thread path after the thread inlet side and / or the thread outlet side. Its inner walls can be covered with sound-absorbing material, the interior can be equipped with a suction box. The latter advantageously has a plurality of suction openings on its side facing the threads. They are advantageously rectangular, their material separated on three sides of the respective opening is bent obliquely into the suction space in the form of a flag.

In a preferred embodiment, the flat box envelops two parallel air supply bars, each equipped with a row of nozzle bodies and essentially pointing towards one another with the latter. It is essentially symmetrical to the two rows of nozzle bodies. The suction box is arranged in the middle between the two sets of threads assigned to the two rows of nozzle bodies and designed in such a way that it acts on both sets of threads with the same intensity. Advantageously, the parts of the flat box lying in front of and behind the rows of nozzle bodies can be displaced essentially perpendicularly to the plane of the filaments, which makes it possible to compensate for the mutual displacement of the filament groups between the thread inlet and the thread outlet, which result when the air supply bar is rotated.

According to the invention, it is possible in the previously described embodiments to exchange individual nozzle bodies for blind bodies and / or individual insert nozzles for blind inserts in order to adapt to changed thread numbers, without this leading to significant disturbances in the thread family.

In order to adapt the device according to the invention to different thread counts, it is further provided that the carrier or supporting frame to which the nozzle bodies are attached can be pivoted about a vertical axis. As a result, the carrier or support frame can be adapted to the mode of operation of the stretching device on which the individual threads are distributed, with - as already described - more or fewer vortex nozzles or nozzle bodies being killed.

Exemplary embodiments of the invention are described below.

Show it

• 1 A, 1 B the diagram of a yarn sheet stretching device;
• 2 shows the view of the device for air swirling the thread sheet;
• 3A, 3B cross-sectional and longitudinal section of a nozzle bar;
• 4A, 4B cross and longitudinal section of a nozzle bar;
• 5 shows a device with two air supply beams each carrying a row of nozzle bodies;
• Fig. 6A cross section through an air supply bar similar to the embodiment of Fig. 8;
• 6B shows a section through an air supply bar equipped with two rows of nozzle bodies offset by approximately 180 °;
• 7A, 7B longitudinal and cross section through a nozzle body;
• Fig. 8A nozzle body with two seven wires nozzles;
• 8B nozzle body with four rows of vortex nozzles;
• 9A nozzle body with insert nozzles;
• 9B front of a nozzle body acc. 9A;
• Fig. 9C two adjacent nozzles acc. 9A (detail);
• Fig. 10 section through the stand of the device acc. 5 to 13 (partially);
• Fig. 11 soundproofing and suction box, longitudinal section;
• Fig. 12 view of the suction box from above;
• Fig. 13 nozzle body with threading slots.

The system for stretching a sheet of threads according to Figures 1 a and 1 b is only shown schematically. On a gate 1 there is a variety of - z. B. 1 000 - supply spools 2, of which the threads 3 run over suitable thread guides, thread tensioners and thread monitors (not shown). The threads are drawn off by the first pair of rollers 4 and then fanned out in groups and passed through nozzle bars 7 lying one above the other in planes. The multi-filament threads are tangled in each of these nozzle bars in what is known as a “tangle nozzle”. This will close the thread, i.e. H. the cohesion of the individual filaments of each thread is improved and the smoothness and stretchability are improved

Details of the configuration of the nozzle bars and the frame 6 and the stand 5 are described below with reference to FIGS. 2 to 4. In the exemplary embodiment, an overflow rod 41 is arranged upstream and downstream of each nozzle bar. The overflow rods are connected to the nozzle bar in a manner not shown.

Following the air swirling, all the threads are brought together again in one plane, which is done by means of two overflow rollers 8. The threads are then drawn off by the input rollers 9 of the drafting system. This is followed by the heated rollers 10, which are heated to approximately 90 ° for processing polyester threads. The threads then pass through a heating plate 11, on which they are heated to more than 120 °. The heating plate 11 is pivotally mounted on the support device 12. It can be lifted off the thread sheet by the drive device 13 - a pneumatic cylinder-piston unit is shown. The drive device 13 is controlled depending on the thread monitor. The output rollers 15 follow behind the deflection roller 14. The peripheral speed of the output rollers 15 is greater than the peripheral speed of the input rollers 9 or heated rollers 10 by the stretching ratio.

The family of threads is then fed via a comb 18 to a warp beam 17 of the plant 16-.

Details of the device for the air swirling of the individual threads can be found in FIGS. 2 to 4.

2, a frame 6 is pivotally mounted in a stand 22 in the pivot axis 23. The frame 6 is pivoted by the square 24 and the locking device 25 and fixed in a desired pivot position by means of the locking bolt 26. The frame 6 consists of a lower cross member 20, an upper cross member 21 and the side parts 19. The cross members and side parts are designed as rectangular hollow profiles. The lower traverse has an air connection 27. Nozzle bars 7 are pivotally mounted in the side parts. Details of a first embodiment of these nozzle bars are shown in FIGS. 3a and 3b. In this embodiment, the nozzle bar 7 is a rectangular profile 28 in cross section, which has the hollow pivot pin 23 at both ends. With these pivot pins 23, each nozzle bar is pivotally mounted on both sides in a side wall of the side parts 19. By means of the locking device 33 connected to the nozzle bar, the nozzle bar can be pivoted relative to the frame and locked in a desired pivoting position by means of fixing bolts 30. The pivot pins 23 are sealed by seals 32, so that the interior of the lower beam (hollow profile) 28 is in air-conducting connection with the side parts 19 supplied with compressed air.

Each lower beam 28 is plan-worked on its upward-facing surface. On the surface a cover plate 29 is placed, which also has a plane-worked lower surface. Both plane-worked surfaces are worked so precisely that they lie on one another in the parting line 34 without substantial gap formation. The cover beam 29 is fixed in its operating position by fixing bolts 30. Grooves 35 are machined into the plane-machined surface of the lower beam and perpendicularly cross the longitudinal axis of the lower beam. Via grooves 36, these grooves 35 are connected to the air-guiding interior of the lower beam.

When the top beam 29 is in place, the grooves serve as thread channels in which the air swirling of the threads running through takes place. It has been found that the threads are preferably passed diagonally through the intermingling nozzles, as seen in the longitudinal section of the grooves 35. For this reason, the cover plate 29 has a thread guide bar 37 in the thread inlet and a thread guide bar 38 in the thread outlet of the lower beam.

The cover bar 29 is lifted off for threading. Then a thread can be simply inserted into a groove 35. Upstream of the nozzle bar are overflow rods 41, which can be connected to the top bar and / or lower bar. The connections are not shown here.

Alternatively, the grooves can also be introduced into the deck beam 29. In this case, the stitch channels 36 open onto the plane-machined surface of the lower beam 28.

It is also possible to make grooves with a shallower depth in the plane-worked surface of both the lower beam and the top beam.

For the air swirling of certain threads, it may be preferred to use thread channels with a circular cross section. A suitable embodiment is shown in Figures 4a and 4b. In this embodiment, the upper beam and the lower beam are firmly clamped together on their plane-machined surfaces. Then holes 40 are made in the parting line 34, half of which are in the lower beam and half in the upper beam. Each part of the bar has a bowl-shaped groove and a round thread channel is created when the top bar is placed on top. In this case, the thread guides 37 and 38 are semi-ring-shaped.

It may be necessary to shut down the 8treckaniage very quickly. This is necessary if a thread breaks the family of threads. In this case, one wants to avoid that the other threads of the thread sheet are damaged by the heating devices. This is done - as shown - on the one hand by the fact that the heating plate 11 can be lifted off the thread sheet.

On the other hand, it is provided according to the invention that the heated rollers 10 are heated with a liquid and that valve devices are provided through which the heated liquid can be exchanged very quickly for cold liquid, these valve devices being operationally connected to the thread break monitoring of the drawing system. As a hot liquid z. B. water, since only temperatures up to 100 ° are desired. Water is also suitable as the cold liquid, cold being understood here as a temperature at which the threads lying on the rollers 10 are no longer damaged.

It should be noted that the surface speed of the rollers 10 can be set independently of that of the rollers 9 or 15, which is known per se from the stretching technology for plastic threads, in particular polyester threads

A further exemplary embodiment of the device according to the invention with some forms of further development is shown in FIGS. 5 to 13.

According to FIG. 5, the air supply bar 101 is cantilevered with its fastening end 123 in the stand 102 and is rotatable about its axis 148. The bar 101 preferably runs essentially horizontally. A row 151 of nozzle bodies 103 is fastened tightly packed on the air supply bar 101

Each nozzle body is a cuboid, which is penetrated by a large number of vortex nozzles. The axis of the swirl nozzles is essentially perpendicular to the longitudinal axis 148 of the air supply bar. Each nozzle body has a system of cavities and channels through which each vortex nozzle is supplied with compressed air. For this purpose, the channel system 109 of each nozzle body is connected to the interior 147 of the air supply bar. Each nozzle body is sealed pressure-tight against the air supply bar.

With the help of the ring collar 124 and a ring nut 152 underlaid with a washer 152, each beam 101 is rotatably fastened in the stand 102. Each air supply bar ends outside of the stand 102 in a flange 146 which can be connected to the air connection 135 (dashed). In the embodiment shown in FIG. 5, two air supply beams 101 with axes 148 running parallel to one another are mounted in the stand 102. They are mounted so that the two rows of nozzle bodies 151, each of which has a bar 101, face each other; the reason for this is described below. The stand 102 can be pivoted about the vertical axis 164 in order to be able to evenly cover the air supply bar with threads even when the number of threads changes over its length.

FIGS. 6A and 6B show an embodiment in which two rows of nozzle bodies 151 offset from one another by approximately 180 ° are arranged on an air supply bar 101. 6A shows an air supply bar 101 with a round cross section. The air supply bar has two longitudinal flat surfaces 160 which extend in the longitudinal direction of the air supply bar. These surfaces form with the circumference of the air supply bar on one side a dovetail-shaped recess 154. Each of the nozzle bodies 103 sitting closely next to one another is pressed against the dovetail-like stop 154 with the aid of a claw 110 and threaded bolts 115. Rubber seals 155, as are indicated, for example, in FIGS. 7A, 7B, ensure the tightness of the connection between the nozzle bodies and the air supply bar 101. Here too, the stand can be pivoted about the vertical axis 164 for the reason cited.

It should be mentioned that in the exemplary embodiment according to FIG. 5, the nozzle bodies can be fastened to their respective air supply bar 101 in the same way as in the exemplary embodiment according to FIGS. 6A, 6B.

The internal structure of nozzle body 103 according to the invention is shown in particular with reference to the embodiment according to FIGS. 7A, 7B. A claw 110 is again provided for fastening the nozzle body. This claw 110 is only hinted at here.

The nozzle body 103 consists essentially of the two plates 116 and 117, which are held together by means of the screws 156. Recesses are worked into the surfaces facing each other. In the assembled state of the plates 116, 117, these recesses form a chamber 109 which serves to supply air to the blow channels 108 and which is connected via the connection opening 157 to the interior 147 of the air supply bar 101, which here has a rectangular cross section. Each of the plates 116 and 117 has a row of thread channels 111, 112; A blow duct 108 leads from each thread duct 107 into the air supply chamber 109. With the aid of the seals 155, each individual nozzle body 103 is sealed off from the air supply bar 101.

In the exemplary embodiment shown, the thread channels 107 are arranged in planes which are perpendicular to the surface 160. It is also possible to arrange the thread channels in planes that form an angle with the surface 160 that is less than 90 °. This means that even when viewed vertically from above, you can see all the thread channels and the threads running through them.

Each thread channel 107 is a bore which is made in one of the plates 116 and 117, respectively. At the thread inlet and thread outlet 149, 150 there is a wear-resistant insert, which serves as a thread guide.

Two further embodiments of the nozzle body according to the invention are shown in FIGS. 8A and 8B. Both embodiments consist of a housing 105 and an insert 106 which is fitted into the housing 105 in a sealing manner. The housing 105 is U-shaped in cross section. The bottom has a hole which is aligned with the connection opening 157 in the installed position. Together with the floor, the two side walls form a cuboid interior that is open at the top and on the two end faces. The use is shown in detail in Fig. 8C. It is a cuboid block that is fitted into the interior of the housing 105. The cuboid block has laterally recesses 118 which, together with the side walls of the housing 105, form an air chamber. Furthermore, the insert 106 also has a recess 109 at its base above the hole in the bottom of the housing. The air chambers 118 are connected to the interior 147 of the air supply bar 101 via this recess 109 and the bore in the bottom of the housing 105 and the hole 157. The thread channels 107 penetrate the insert in the longitudinal direction, namely transversely to the longitudinal direction of the air supply bar 101. The blowing channels 108 are perpendicular to the thread channels 107. They open into the recesses 118 which, as said, with the interior 147 of the air supply bar 101 via the connection opening 157, the bore in the bottom of the housing 105 and the recess 109 in the insert 106 are connected.

While the embodiment according to FIGS. 8A, 8C also has two rows of thread channels 111, 112, the four rows of thread channels 111 to 114 are provided in insert 106 of FIG. 8B. In order to achieve a greater channel density, which is advantageous for achieving the same conditions for the threads of the thread sheet, the adjacent rows are offset from one another in such a way that the individual thread channels are “in a gap; the rows 112 and 114 have seven, the rows 11 and 113 each have six thread channels 107.

A further embodiment of the nozzle body is shown in FIGS. 9A and 9B. In a hollow, cuboid box 119, which is closed by the cover 144 and which replaces the housing 105 of the previously described embodiment, there are bores 136 for receiving the individual swirl nozzles. The swirl nozzles are tubular nozzle inserts 120 which are inserted into the bores. Each tubular nozzle insert 120 has a radial blow duct 108, which the air supply chamber 109, i. H. connects the interior of the box 119 with the thread channel 107. The tubular nozzle inserts 120 are each provided with a suitable thread guide on their thread inlet side and on their thread outlet side. The inlet-side ends 149 of the nozzle inserts are also provided with rectangular plates 121, the side lengths of which are dimensioned such that they meet one another with practically no space when nozzles 120 are inserted (FIG. 9B). Their position cannot then be changed without removing a few inserts 120. If, for example, the plates (as in FIG. 9C) are cut in a step-like manner on the edges 139 on the back and on the edges 140 on the front, the edges 139 can sit on the edges 140 during assembly and with the aid of only one fastening tab 141 all nozzle inserts are fixed in their longitudinal direction.

The nozzle bodies, as shown in FIGS. 7 to 9, give the possibility of increasing the number of the same time when using nozzle bodies according to FIGS. 7A, 7B or 9A to 9C and a nozzle bar according to FIGS .6 some of the nozzle bodies are replaced with dummies. These dummies contain no vortex nozzles or air channels and only serve to seal the nozzle bar. When using nozzle bodies according to FIGS. 8A to 8C, the inserts of some of the nozzle bodies of an air supply bar can be replaced by dummies, which in turn have the purpose of sealing the openings 157 of the air supply bar. By shutting down some nozzles or nozzle bodies, even with fewer threads, the threads are evenly distributed over the working width of the drafting system and the warp beam.

The dimensions of the mentioned dummies correspond to the nozzle bodies according to FIGS. 7 and 9 or the inserts according to FIGS. 8A to 8C.

When using nozzle bodies according to FIGS. 9A to 9C, it is also possible to replace the nozzle inserts with dummies which serve to seal the bores in the nozzle body.

It should be mentioned that in order to adapt the system to different thread counts of the air supply bar according to FIGS. 5 and 6, it can also be pivotable about the axis 164, which is shown in FIGS. 5, 6A and 10, 11. In this way, the thread density can be adjusted. This means that the threads can be distributed evenly across the width of the system. It is also advantageous that the individual nozzle bodies face each other the air supply bar are rotatably arranged so that when the air supply bar is rotated about the axis 161, the individual thread channels can be aligned with the thread path in the desired manner.

This invention also focuses on the environmental effects of the device for intermingling a plurality of threads. A device by means of which such environmental influences are avoided is shown in FIGS. 11 and 12.

It is known that the interweaving treatment of the threads is associated with an extraordinarily high level of noise. In addition, in the blow treatment of such a large number of individual threads, the air consumption is considerable and is no longer negligible in the regulation of the indoor climate. The embodiment shown in FIGS. 11 and 12 is aimed in particular at mitigating the effects of these two factors. The system for intermingling a large number of threads shows two air supply bars 101 with attached nozzle bodies 103. In this respect, the system corresponds to the system shown in FIG. 5. As can be seen in FIG. 11, a box 126 encloses the air supply bars 101 over their entire working width. Furthermore, the box 126 extends on both sides in front of and behind the air supply bar 101 over part of the thread path. In the right part of box 126, the inside is shown with a soundproofing covering 128; other sound-absorbing measures, such as internals based on reflection and / or interference, can also be provided.

A suction box 129 is provided on each side in the interior of the flat box 126 between the two air supply bars 101 and the thread groups 122 assigned to them; the suction boxes 129 also extend over the entire working width of the air supply beams 101 and essentially over the length of the box 126. The suction boxes are connected to a suction device via the suction connections 158. Each suction box 129 has suction openings 131 on its surfaces facing the thread coulters 122, which are shown in FIG. 12 as a top view of a suction box 129. Each suction opening is provided with an air vane 132. The air guide vanes 132 are aligned in such a way that they collect the air coming from the nozzle bodies 103 and flowing to the open ends of the box 126 and direct them into the suction box 129. In the embodiment shown, the holes 131 were created by cutting or punching the hole borders on three sides and bending the resulting flags 132 inwards. Both box 126 and suction boxes 129 are essentially symmetrical to the central plane 127.

In Fig. 11, both bars 101 are rotated clockwise from the vertical plane. This leads to the fact that the thread sheets on the input side are offset by an amount 125 from the output side. Since the favorable deflection angle for guiding the threads through their thread channels is adjustable and depends on the individual thread and process parameters, the upper cover and the lower cover of the box 126 are adjustable in height. For this purpose, adjustable suspensions 162 are provided, which in the exemplary embodiment shown are designed as screw spindles. 163 is marked with ropes on which the widely protruding box ends are suspended.

5 shows a modified air supply compared to the embodiment according to FIG. 10. The flange connection 142 for the air connection 135 is located here on the stand 102, the cavity 143 of which is sealed accordingly. The end 123 of the air supply bar 101, which is mounted in the stand 102, is closed by a cover 159 and has inlet openings 145 within the stand 102 for the air to pass from the stand 102 into the bar 101.

Since the number of threads of the thread coulters 122 can be changed, the equipping of the air supply bar 101 with nozzle bodies 103 is expediently based on the maximum number of threads. Voted. The adaptation to the specific number of threads is then easily possible in the device according to the invention in that individual nozzle bodies or insert nozzles - as described - are replaced by blind inserts.

As can be seen from the drawing, in particular FIGS. 5 and 6B, it is possible to close the individual swirl nozzles tightly, with distances of 2 to 3 mm between adjacent thread channels being preferred values. In this way, for example when using nozzle inserts 106 according to FIG. 8B, a large family of threads can already be accommodated in a row of nozzle bodies 151.

The threads are threaded into the individual swirl nozzles using bristles. By appropriate training of the vortex nozzles and installation of the blowing channels, it can also be achieved that the vortex nozzles suck in air. In this case, the threads can be threaded pneumatically.

An embodiment of the nozzle body 103 with another possibility of threading is described with reference to FIG. 13. 13 shows three different embodiments. Common to all is that the nozzle body 103 is designed as a solid body which, as described with reference to FIGS. 7A, 7B, is composed of two plates which form an air chamber 109 between them. Nozzle holes are made in the nozzle body. The nozzle bores have the threading slots 305, which are open towards the side surfaces of the nozzle body.

First, reference is made to the left vertical row of nozzles. A slotted tube 301 is firmly inserted into the housing bore 136. Its slot 305 coincides with the threading slot 305 of the bore 136. In the tube 301 sits a cylindrical inner body 302 which is rotatable therein and which is in its outer surface has a rectangular groove 303 running axially over its entire length or a rounded groove 304. To insert the thread, the inner body 302 is rotated such that groove 303 or 304 and threading slot 305 coincide. In the working position, the inner body 302 is rotated so that the blow channel 108 meets the groove 303 or 304. The inserted thread 311 is carried along when the inner body 302 rotates.

Another example of a threadable swirl nozzle is shown in the upper example of the right vertical nozzle row. A slotted tube is firmly inserted into the nozzle bore 136. Its slot in turn coincides with the threading slot 305 of the nozzle body 103. An inner tube 307 slotted on a surface line is rotatably inserted in the tube 301. In the position shown, in which the slot of the inner tube 307 covers the threading slot 305 of the nozzle body or tube 305, the thread can be inserted into the inner tube 307. By turning the inner tube 301, the threading slot 305 is closed and the slot of the inner tube is made to overlap with the blowing channel 306.

The two lower examples of the right row of nozzles show a simplified version. The outer tube 301 has been omitted. An inner tube 308 rotatable in the housing bore 136 has a slot 310 which extends over its length and is used for threading, and also has a blow hole 309. Both are offset from each other, for example by about 90 °. In the threading position of the inner tube, the slot 3.10 of the inner tube 308 is in correspondence with the threading slot 305 of the nozzle body 103 13 shows the two situations with one another

In order to make room for the lateral threading, the nozzle bodies must be moved apart in the area in which the insert nozzles 104 are located. In the embodiment shown, the nozzle body 103 has a lateral widening 312 on its foot part, so that the seal with respect to the air supply bar 101 is also ensured here.

Otherwise, the nozzle body shown in Fig.13 z. B. also fastened by means of a dovetail guide and a claw (see, for example, FIG. 6A).

The embodiment of the nozzle body according to FIG. 13 has the advantage on the one hand that the threads can be inserted easily. Another advantage also lies in the fact that the vortex nozzles can be separated from the air supply individually by rotating the inner body 302 or inner tube 307, 308 and laid dead. When using such a nozzle body, a particularly simple adaptation of the device to the desired number of threads is therefore possible.

Claims (46)

1. Device for simultaneous twisting of a large number of multifil threads, particularly in combination with a warping or stretching and warping operation, by means of streams of compressed air directed obliquely onto the individual threads, characterised in that a plurality of nozzle bodies (7; 103) each occupied by several spineffect nozzles (35, 36; 104) are provided on a common support or support frame (6; 102), and the position of the nozzle bodies relative to one another and to the group of threads (3; 122) is variable.

2. Device as claimed in claim 1, characterised in that the nozzle bodies (7 ; 103) are constructed as hollow bodies and the internal spaces (109) communicate both with a compressed air source and with the air blast channels (36 ; 108 ; 306) of the individual spin-effect nozzles (35, 36; 104) of the respective nozzle body (7; 103).

3. Device as claimed in claims 1 or 2, characterised in that a plurality of horizontal nozzle bars (7) are mounted in a rectangular frame (6) so as to be pivotable about a horizontal axis, each nozzle bar has an air channel passing through it in its longitudinal direction and a plurality of thread channels passing through it at right angles to its longitudinal direction, and each thread channel is connected to the air channel by a cross channel.

4. Device as claimed in claim 3, characterised in that the frame is pivotable about a horizontal axis.

5. Device as claimed in claims 3 or 4, characterised in that at least one lateral flank of the frame is constructed as a hollow section, the hollow section is connected to a compressed air source and the nozzle bars are connected to the hollow section so as to duct air.

6. Device as claimed in claim 5, characterised in that the nozzle bars are mounted on the hollow section by means of hollow pivot pins (23).

7. Device as claimed in claims 4 to 6, characterised in that the lower flank of the frame is constructed as a hollow section and is connected to the compressed air source.

8. Device as claimed in claims 3 to 7, characterised in that the cross channels which open into the thread channels have an air blast component in the direction in which the thread runs.

9. Device as claimed in claims 1 or 2, characterised in that the nozzle body (7) is constructed as a nozzle bar (28) with an air channel extending in its longitudinal direction, the nozzle bar (28) has a plane surface lying parallel to its longitudinal direction, a cover bar (29) with a congruent plane surface is placed on the plane surface of the nozzle bar (28), thread guide grooves (35) are made at right angles to the longitudinal direction of the nozzle bar (28) in at least one of the plane surfaces, and each thread guide groove (35) is connected to the air channel by means of a cross channel (36).

10. Device as claimed in claims 1 or 2, characterised in that a row (151) of nozzle bodies (103) are mounted close to one another on a substantially horizontally extending air supply bar (101) and each nozzle body (103) has a number of spin- effect nozzles (104; 120) the thread channels of which run parallel to one another and the air blast channels (108) of which are connected to a common air supply (109).

11. Device as claimed in claim 10, characterised in that the spin-effect nozzles (104; 120) in the nozzle bodies (103) are arranged in one or more rows (111-114) arranged parallel to one another and the parallel planes (127) run through the nozzle axes (134) of the individual rows (111-114) substantially at right angles to the air supply bar (101).

12. Device as claimed in claims 10 or 11, characterised in that the distance (133) between two adjacent thread channels (107) is at least 1.5 mm and at most 15 mm.

13. Device as claimed in one of claims 10 to 12, characterised in that the individual nozzle body (103) has at least four and preferably at least six spin-effect nozzles (104; 120) arranged a small reciprocal distance (133) from the thread channels (107).

14. Device as claimed in one of claims 10 to 13, characterised in that the nozzle body (103) consists of a housing (105; 119) and an insert which fits in it and accommodates the spin-effect nozzles (104 ; 120), and the air blast channels (108) of the individual spin-effect nozzles (104; 120) are connected to a common air supply (109).

15. Device as claimed in claim 14, characterised in that the insert (106) is equipped with up to six rows (111-114) of spin-effect nozzles (104; 120) running in planes (127) which are parallel to one another.

16. Device as claimed in claim 15, characterised in that the thread channels (107) of adjacent rows (111-114) are arranged offset with respect to one another in order to reduce the row spacing (Figures 9B and 13).

17. Device as claimed in one of claims 10 to 16, characterised in that the air supply (109) for supplying the air blast channels (108) is provided between the insert (106) and the inner wall of the housing (105) or in the centre of the insert (106).

18. Device as claimed in one of claims 10 to 17, characterised in that the insert (106) consists of at least two parallel plates (116, 117) each accommodating one or two rows (111-114) of spin-effect nozzles (104; 120), and a groove running obliquely with respect to the thread channels (107) and serving to supply air (109) to the air blast channels (108) is provided on all or part of the said plates.

19. Device as claimed in one of claims 10 to 13, characterised in that the housing (105) is constructed as a hollow box (119) which has bores (136) to receive the tightly packed individual insert nozzles and the air blast channels (108) of the insert nozzles (120) open into the interior of the box (137) which is in turn connected to the interior of the bar (147).

20. Device as claimed in claim 19, characterised in that the rows of nozzles (111-114) with the insert nozzles (120) are preferably offset with respect to one another by half the distance (133) between two insert nozzles (120) lying adjacent to one another in the same row (111-114), and the individual insert nozzles (120) are provided on their front faces with a rectangular plate (121) the edge lengths of which are such that in the assembled state the plates (121) butt against one another substantially without spaces in between.

21. Device as claimed in claim 20, characterised in that the rectangular plates (121) are set down asymmetrically on the edges (139) to overlap one another (138) and all the insert nozzles (120) are held by a common clamp (141) and aligned as regards the position of their air blast channels (108).

22. Device as claimed in one of claims 10 to 21, characterised in that the air supply bar (101) is rotatable about its longitudinal axis (148) in its supporting structure (102) to vary the angle of defection of the threads (122) running through the spin-effect nozzles (104; 120).

23. Device as claimed in one of claims 10 to 22, characterised in that the stand (102) supporting the air supply bar (101) is hollow and has a flange connection (142) for the air line communicating with its interior (143), and the end of the bar (123) sitting in the stand (102) is provided with inlet openings (145) for the blast air.

24. Device as claimed in one of claims 10 to 22, characterised in that the air supply bar (101) has a flange (146) for direct connection of the blast air line on its end which is mounted in the stand (102) and passes through the latter.

25. Device as claimed in one of claims 10 to 24, characterised in that two rows of nozzle bodies offset by approximately 180° with respect to one another are arranged on an air supply bar (101) (figures 8 and 9).

26. Device as claimed in one of claims 10 to 25, characterised in that the air supply bar (101) with the nozzle bodies (103) is enclosed by a flat box (126) which extends towards the thread inlet side and/or the thread outlet side of the bar (101) over a part of the thread path, is equipped on the inner face with sound-absorbing means and/or its interior (137) is equipped with an extraction arrangement (129).

27. Device as claimed in claim 26, characterised in that the extraction box (129) which extends substantially over the length of the flat box (126) measured in the direction in which the thread runs has a plurality of extraction openings (131) on its side facing the threads (122).

28. Device as claimed in claim 27, characterised in that the extraction openings (131) are rectangular and the material thereof is cut away on three sides of the respective openings (131) and bent back at an angle into the suction chamber (130) as vanes (132).

29. Device as claimed in one of claims 10 to 28, characterised in that two air supply bars (101) which are parallel to one another are each equipped with a row of nozzle bodies (151) and are arranged above one another in such a way that the nozzle bodies (151) point substantially towards one another.

30. Device as claimed in claim 29, characterised in that the extraction box (129) is arranged on a plane between the air supply bar (101) and is provided with a plurality of extraction openings (131) which are directed at the two groups of threads (122) associated with the rows of nozzle bodies (151).

31. Device as claimed in one of claims 26 to 30, characterised in that the parts of the flat box (126) lying in front of and behind the rows of nozzle bodies (151) are movable substantially at right angles to the groups of threads (122) in order to equalise the displacement (125) of the groups of threads (122) resulting from the turning of the air supply bar(s) (101).

32. Device as claimed in one of claims 10 to 31, characterised in that the inserts (106) accommodating the spineffect nozzles (104; 120) or the hollow boxes (119) can be replaced by blind inserts or blind boxes in order to adapt the device to the number of individual threads in the group of threads (122) to be processed.

33. Device as claimed in one of the preceding claims, characterised in that the individual nozzle bodies (7; 103) or groups of nozzle bodies are connected by supply hoses to at least one common air bar.

34. Device as claimed in at least one of the preceding claims, characterised in that the common support or support frame is pivotable about a substantially vertical axis (164).

35. Device as claimed in one of the preceding claims, characterised in that the air blast channels of a nozzle body lie in a plane which forms an angle between 0° and 45° with respect to the vertical plane through one of the air blast channels.

36. Device as claimed in one of the preceding claims, characterised in that the nozzle bodies are rotatable about their vertical longitudinal axis in such a way that they can be aligned with the axes of their air blast channels in the direction in which the thread runs irrespective of the rotated position of the support frame.

37. Device as claimed in claim 36, characterised in that the individual nozzle bodies are each rotatable about their longitudinal axis indepen- denfly of one another.

38. Device as claimed in one of the preceding claims, characterised in that the nozzle bodies can be removed individually from the formation and/or disconnected from the air supply.

39. Device as claimed in one of the preceding claims, characterised in that the nozzle body (103) has bores (136) each having a threading slot (305), each bore is connected by an air blast channel (connecting channel 306) to the air-ducting interior (109) of the nozzle body, and a cylindrical inner body provided with a groove or threading slot is inserted into each bore (136) so as to be rotatable.

40. Device as claimed in claim 38, characterised in that the spin-effect nozzles (308) are rotatable in the bores (136) of the nozzle body (103) and their threading slots (310) and their bores (309) which act as air blast channels are arranged offset with respect to one another on the periphery of the nozzle body in such a way that in the threading position the air blast channels (309) are covered by the bore walls and in the working position he threading slots (310) are covered by the bore walls.

. 41. Device as claimed in claims 8 or 39, characterised in that the individual nozzle body (104) consists of an outer tube (301) fitted tightly in the bore (136) of the nozzle body (103) and having a threading slot (35) and an inner body (302; 307) which is rotatable in the fixed tube (301) with provisions (303; 304) for receiving the thread (311) and the fixed tube (301) is connected to the air-ducting interior (109) of the nozzle body (103) by a connecting channel (306).

42. Device as claimed in claim 41, characterised in that a rectangular (303) or preferably rounded thread guide groove (304) is machined into the surface of the inner body (302), this groove being rotated so that in the threading position it overs the threading slot (305) and in the working position it covers the connecting channel (306) to the interior (109).

43. Device as claimed in claim 41, characterised in that a rotatable inner tube (307) having a longitudinal slot (310) is provided as the inner body (302).

44. Device as claimed in one of claims 39 to 43, characterised in that the rotatable inner bodies (302, 307, 308) of a nozzle body (103) can be rotated together.

45. Device as claimed in one of the preceding claims, characterised in that the threads (3; 122) pass through a wetting arrangement before entering the spin-effect nozzles (35; 104).

46. Device as claimed in one of the preceding claims, characterised in that thread guide eyes are provided before and after the spin-effect nozzles (35; 104).

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