CH665619A5 - METHOD AND DEVICE FOR SPLICING WOVEN YARNS. - Google Patents

Description

DESCRIPTION

The invention relates to a method and an apparatus for splicing spun yarns. According to the prior art, a method is used in which ends of yarns that overlap are acted upon by a compressed fluid in order to close the yarn ends to one another spliced.

In a device using such a yarn splicing method, such as e.g. For example, in an apparatus disclosed in U.S. Patent No. 4,002,012, two yarn ends are placed in a yarn splice opening so that they extend in opposite directions to each other, and compressed air is introduced into the yarn splice opening to over-60 lapping portions of the To set the yarn ends in an oscillating or rotating movement and thus to swallow the yarn ends together in order to bring about the splicing of the yarns. In this device, if the overlapping parts of the yarn ends are both clamped 65 at two different locations and sections of a certain size of the overlapping parts of the two yarns, which are accordingly blocked in a certain section, are rotated, fibers of the yarn sections are passed through between the clamping points

temporary twisting entangled with each other, and so the intended splicing of the yarns is achieved. In such a splicing of yarns, however, the outermost yarn ends lying outside the clamped parts extend outwards from the opposite ends of the clamped parts and remain as an “antenna” on the spliced yarns. Such an “antenna” can possibly be caught by a knitting needle during a subsequent knitting process and cause the yarn to tear, which worsens the quality of a product, such as a knitted fabric and textiles.

Also, in the device described above, the fibers can partially be intertwined in a direction opposite to the particular direction of rotation and accordingly run parallel to one another; with the result that the spliced connection of the yarns does not have sufficient strength and also not sufficient strength. In particular, if essentially the center point between the overlapping parts of the ends of both yarns is acted upon by an injected air flow rotating in one direction, then the overlapping parts are inflated and the yarn ends on opposite sides of the point of action of the compressed air are twisted in opposite directions to one another, so that one of the yarn ends is twisted in the same direction as the twist direction typical of one yarn, while the other yarn is twisted in the opposite direction to the twist direction typical of the other yarn. Accordingly, part of the spliced connection is increased in strength, while the other part of the spliced connection has a lower strength, and since the maximum value of the tensile load of the spliced connection is determined by the weakest point of the spliced connection, the entire spliced connection has a lower Strength.

An object of the invention is to provide a yarn splicing process that ensures a spliced connection that is substantially the same thickness and thickness as the individual yarns that are to be spliced together. The other task is to propose a device for performing the above method.

The inventive solution to this problem consists in a method of the type mentioned, which is defined according to the characterizing features of claim 1. The associated device is evident from claim 4. In this way, a spliced yarn connection can be created which has a structure very similar to the structure of the original yarn and which has essentially the same strength, stretch and twist number as a single yarn.

Details and advantages of the invention emerge from the following description, in which exemplary embodiments are explained with reference to the drawings. The drawings show:

1 is an illustration for explaining the principle of the method according to the invention,

2 shows an enlarged schematic illustration of a spliced connection obtained by the method according to the invention,

3a, 3b, 3c and 3d representations of different spliced connections,

4 shows a schematic illustration of a winding machine which has a yarn splicing device,

5 is a front view of a yarn splicing device,

6 is a plan view of the yarn splicing device,

7 is a plan view for explaining the function of a clamping device,

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8 is a plan view showing a yarn holding device, a cutting device and a rotatable guide plate,

9 is a perspective view of a stop for a yarn movement lever,

10 is a schematic representation of the adjustment process on a position-changing stop according to FIG. 9,

11 is a front view of the device with the yarn ends YP, YB being inserted into the yarn splicing device.

12 is a partial front view showing the relative positions of a yarn splice member and a control plate.

13 is a cross-sectional view of an embodiment of the yarn splicing element,

14 to 16 a first embodiment of a yarn splicing element in plan view, in side view and in cross section,

17 to 19 a second example of a yarn splicing element,

20 to 22 a third embodiment of a yarn splicing element,

23 to 25 a fourth embodiment of a yarn splicing element,

26 to 28 a modified embodiment of a yarn splicing element with a nozzle opening arranged in a different position,

29 is a plan view showing the effect of the yarn holding device,

30 shows a cross-sectional illustration with an exemplary embodiment of a screw-on nozzle,

31 is a perspective view of the relative arrangement of a guide plate and a guide rod.

32 is a side view showing the yarn guidance through the yarn splicing device, and

33 to 35 representations of different phases of the yarn splicing process in the yarn splicing device.

The principle of the yarn splicing method according to the invention will now be described with reference to FIG. 1.

It should be noted here that the term "yarn", as used in the description below, generally applies to a spun yarn made either from a bundle of staple fibers, i.e. H. So natural fibers, such as As cotton, wool, hemp, etc. and long chemical fibers, which are cut short, or consists of a bundle of such mixed fibers. However, endlessly long man-made fibers can also be applied to the invention if the conditions are changed accordingly in part. Furthermore, it is assumed that a "yarn" has a typical number of twists, which is represented by the number of twists per inch, and that such twists are distributed substantially uniformly over the entire length of the yarn.

In Figure 1, a yarn is trimmed to create two separate yarn ends YP and YB. The yarn ends YP, YB are guided in opposite directions and are overlapped with one another in a parallel or intersecting arrangement. The ends of both ends of the yarn are twisted open to prepare the splicing of the yarns. The untwisted parts are parts where the twist typical of the yarn is either substantially zero or significantly less in number than the twist typical of the yarn, and preferably the yarn ends are brought into a state where there is no twist exists and in which the fibers forming the respective yarn run essentially parallel to each other.

Furthermore, the end pieces of the yarn ends YP, YB are not under tension and thus remain freely movable, while each yarn YP, YB is at a point thereof that is in a

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predetermined fixed distance from the extreme end is attached. is clamped so that it cannot be opened beyond the clamping point K1 or K2 of the yarn, which thus forms a fixed point.

In this state, both yarns YP, YB are turned in opposite directions XI and X2 at two different points Cl and C2 of the overlapping area of the yarns. In particular, the directions of rotation are determined in connection with the directions of twist typical of the yarns to be spliced, and the direction of rotation at position Cl is selected so that it is the direction XI in which the particular rotation of the yarn sections between the clamped point Kl of yarn YP and the tightened point Cl is released or untwisted due to the twisting of the yarn, while the direction of rotation at position C2 is chosen to be the direction X2 in which the particular twist of yarn sections between the other clamping point K2 of the yarn YB and the Pivotal point C2 is released or turned up. The yarns YP and YB shown are shown to have their typical twist in a Z direction, but it is clear that if a yarn has an S twist, the directions of rotation XI, X2 must be reversed.

It should be noted that an inflow rotating flow of a fluid is used for yarn twist, especially an air flow that is most easily available.

The behavior of yarns triggered by the above-described twisting action will now be described.

For reasons of clarity, the area of the yarn YB between the clamping point K2 and the extreme end of the yarn is divided into four sections AI to A4.

Specifically, the section AI is a section between the extreme end of the yarn end and the point of application of the rotating current Cl; section A2 is a section from the point of application of the rotating current Cl to the center M of the supplying points Cl, C2; the section A3 is a section from the center point M to the point of rotation C2 and the section A4 is a section from the point of rotation C2 to the other clamping point K2. Similarly, the other yarn YP is divided into sections B1 to B4 starting from the extreme end of the yarn end.

The sections Al, A2 of the yarn YP and the sections B3, B4 of the yarn YP are rotated at the point Cl providing the rotation by a rotating current in the direction of the arrow XI.

In this case, an S twisting force is applied to the parts of the yarns in sections A1 and B4, while a Z twisting force is applied to parts of the yarns in sections A2 and B3. However, since the yarn YB in section AI is not held or has an open end, the S twist disappears from the yarn section AI, while in the yarn YB in section A2 the original Z twist remains. At the same time, fibers spun from the yarns in sections A2 and A3 are intertwined and connected and twisted in Z-twist, while the end piece of the yarn in section AI in section Z-twist in section A4 is swallowed up with part of the yarn YP and so that it is progressively twisted. When part of the YP yarn in section B4 is in a non-spun state. then fibers in sections AI and A4 are also intertwined and connected to one another, thereby forming a single yarn with a Z twist.

However, it should be noted that after the part of the yarn YP in section B4 is twisted in the direction of twist typical of the yarn, it tends to be untwisted, but when the yarn parts in sections B3 and B4 are extremely tight so that they cannot turn, the pieces of yarn YB in sections AI and A2 are mainly turned around the other yarn YP. As a result, the yarn YB is twisted or twisted in the Z direction around the yarn YP while further rotating itself in the Z twist.

5 In addition, twisting the yarns in the direction of arrow mark X2 at the other rotating point C2 will also cause phenomena similar to those described above. In this case, the end piece of yarn YP in section B1 is free, and accordingly, while the Z-twist is also created in yarn piece YP in section B2, fibers of yarn YP in areas B1, B2 are intertwined with one another and with YB fibers of yarn are connected, thereby forming a single yarn twisted in the Z direction.

Accordingly, the end pieces A1, A2 of the yarn YB running next to the point Cl causing the rotation between the points Cl and C2 causing the rotation are progressively progressing in the Z direction - with reference to the center point M-, i.e. H. thus twisted in the same direction as the twisting direction typical of the yarn, and they are wound in the areas B4 and B3 around the parts of the yarn YP, while the end pieces of the yarn YP in the sections B1 and B2, which, based on the Center M are arranged on the C2 side to be rotated in the Z direction, ie that is, in the same direction as the twisting direction typical of the yarn, and they are wrapped around the parts of the yarn YB in the areas A4 and A3. As a result, the twisting direction is effected in the same direction as the original twisting direction of the yarns over the entire area of the splice joint 30 thus formed, and if the overlapping parts of the yarn ends are in an untwisted state before their splicing, the connection becomes after the yarns are spliced have a structure similar to that of the original yarn.

Examples of such connections formed by splicing are shown in FIGS. 2 and 3. Figure 2 is a view of a spliced connection in which yarn ends are untwisted over an entire area of overlapping parts. It can be seen from FIG. 2 that the spliced connection Y1 has the shape of a single yarn 40 which has an actual Z twist in the same direction over the entire length, so that the two original yarns can no longer be distinguished from one another, with fibers of the yarn ends intertwined so that they join the two yarns into a single twisted yarn 45. In this case, a high quality splice connection can be obtained, at which point the characteristics of the yarns are not a little worse than that of the original single yarn. Apart from this, the connection has no “antenna”, which extends from one end of each 50 of the yarns thus spliced together.

FIGS. 3a to 3b show different structures of connections which were formed as a function of the differently untwisted states of overlapping yarn end sections. In the connection Y2 shown in Fig. 3a, fibers of both yarns are closely connected between the three-phase applying points Cl and C2, and are accordingly mixed in such a way that it is no longer possible to distinguish between them, thereby creating a section Y2a is formed in the form of a 60 single yarn that is twisted in the same direction as the twist direction typical of the yarns, with both yarn end pieces being wrapped around each other. In this case it can be assumed that both yarns, as can be seen in FIG. 1, were twisted together in the untwisted state. It should be noted that both intertwined parts Y2a and Y2b have turns in the same direction as the direction of rotation typical of the yarns and thus to a certain extent to the yarn strength

contribute. The splicing connection Y3 according to FIG. 3b is an inverted arrangement and between the points C1 and C2 supplying the three-phase current, two yarns are wound around one another in the same direction as the direction of rotation typical of the yarns in such a way that a distinction between the two yarns is possible is, the opposite yarn end pieces are strongly mixed together and thus form a spit connection in the form of a single yarn. Furthermore, in the connections Y4 and Y5 shown in FIGS. 3c and 3d, both yarns are intertwined on the one side of a region defined by the two points which apply the twist, the connection between the yarns in such a way it is possible to distinguish between the two.

As can be seen in the examples of connections shown in FIG. 3, each connection in its entire area has an actual twist in a direction which corresponds to the twisting direction typical of the yarns to be spliced, regardless of whether the two Yarns are combined into a single yarn in a certain area, so that a distinction can be made between them. Accordingly, each connection will have essentially the same characteristics in terms of yarn tenacity, yarn strength, elongation, number of turns, etc. as a single yarn.

It should be noted that the connections according to FIGS. 3a to 3d are only shown in a schematic representation and that in practice the connection will change in its configuration depending on how the conditions change, e.g. the pressure of the air applied, the amount of air, the bore of an air jet nozzle, the angular arrangement of a jet bore, the number of blasting operations, etc. In addition, the connections will vary according to the yarns to be spliced, the length of the fibers, the degree of untwisting, etc.

An embodiment of an apparatus in which a connection as described above can be obtained will now be described in detail with reference to the drawings.

Fig. 4 is a schematic view of an automatic bobbin winder using a yarn splicing device according to the invention. The automatic winder has a pair of side frames 1, between which a rod 2 and a suction pipe 3 extend. A winding unit 4 is rotatably mounted on the rod 2, and during the operation of the automatic winding machine it is also connected to the pipe 3 and fastened thereon. The tube 3 is connected to a blower, not shown, and is constantly acted upon by a suction air stream.

The winding unit 4 winds yarn from a bobbin B onto a package P. Specifically, a yarn Y11, which is unwound from a spool B on a mandrel 5, runs over a guide 6, a tensioner 7 and a detector device 8, which are used both for checking and for cutting out yarn irregularities, such as e.g. B. beads, as used for checking the passing of the yarn, and is finally wound onto the package P, which is rotated by a winding drum 9. When an irregularity of the yarn is detected by the detector device 8, a yarn cutter located near the detector device 8 is used to cut the passing yarn Yll, and the winding operation is stopped while a yarn splicing process starts. Specifically, a first suction port 10 is made ready to feed a yarn YP to the package side, while a transfer pipe 11 is made ready to deliver a yarn YP to the package side, each to a yarn splicer installed in one layer by

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the normal yarn path Yll. After the splicing of both yarns YP and YB by the yarn splicing device 12 has been completed, the rewinding of the yarn is started again. The suction mouth 10 and the transfer pipe 11 are connected to the pipe 3, via which a suction air flow is effective. The yarn splicing device 12 has a yarn splicing unit 15, which is connected via a line 14 to a tube 13, which connects to an air source of another circuit, so that e.g. Compressed air can be used for this.

The general construction of the yarn splicing device is shown in Figures 5 and 6. During a normal rewinding process, the yarn Yll runs over a path beginning at the bobbin B, past the detector device 8, a stationary guide 60 next to one side of the detector device 8 and rotatable guides 17 and 18, which lie next to opposite sides of the detector device 8; it then runs over the yarn splicing device 12 and arrives at the yarn package P.

The yarn splicing device 12 essentially consists of a yarn splicing element 101, a yarn pressing device 102, yarn end twisting nozzles 103 and 104, a yarn movement lever 105, yarn cutting devices 106 and 107 and yarn clamping devices 108 and 109. Suction openings at the ends of the suction mouth 10 and the transfer pipe 11 are rotated about the yarn splicing device 12 moves in such a way that they intersect with one another until they suck in yarn ends YP and YB on the side of the package P and the side of the bobbin B and come to a standstill in their respective positions outside the yarn splicing device 12. It should be noted that the suction mouth 10 and the transfer pipe 11 do not take effect at the same time and accordingly operate with a certain time delay. In particular, first of all, by rotating the suction mouth 10, the yarn end YP on the package side P is guided into a position outside of the yarn splicing device 12, and essentially at the same time as this movement is stopped, a rotary lever 20 of the yarn clamping device 109 on the package side P is replaced by a not shown Control cam in the counterclockwise direction in a phantom position 20-1 shown in Fig. 7 until it strikes against a support block 21 arranged in a fixed position and is stopped by this. At this moment, the yarn YP is gripped and moved by a hooked part 20a of the rotary lever 20 until it is clamped between the support block 21 and the rotary lever 20.

While the rotary lever 20 is now in operation, the yarn positioned on the fixed guide 16 and the rotatable guides 17, 18 is guided through inclined surfaces 16a, 17a, 18a of the guides 16, 17, 18 and inserted into a guide groove 19 in such a way that that the detector device 8 arranged in the same place as the guide groove 19 can give a message as to whether a yarn YP is present in the guide groove 19 or not, and furthermore a message as to whether two or more yarns have been sucked into the suction mouth 10 by mistake or not, etc. After operating the yarn YP, as shown in Fig. 8, the rotatable guides 17, 18 are rotated counterclockwise around a pin 22 by a control cam, not shown, and as a result, the yarn YP is removed from the Detector device 8 removed and fitted into relaxation guides 17b, 18b of the rotatable guides 17, 18.

Furthermore, the yarn end YB on the side of the bobbin B is sucked into the transfer pipe 11 substantially simultaneously with the rotary movement of the rotatable guides 17, 18 and then moved by rotation in the opposite direction to the suction opening until it is in a position outside the

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Yarn splicing device 12 is stopped. In the essential surface 48a of the cam 48 is moved, and accordingly simultaneously with the stopping of the rotary movement of the lever 32 in the position against the first conduit 11, a support plate 23a of the yarn clamp pre-stop 34a is guided. Then a thread cutting device 108 is carried out via the rotary lever 20 in the same direction. Then the lever 32 is rotated back once in the opposite direction along a guide plate 24 by a control not shown, after which the cam which moves the yarn YB is moved until it cuts a block of yarn ends into a untwisting nozzle which later to 23 b, which is arranged in a fixed position to describe the yarn YB, is sucked in. Subsequently, the lever 32 can hold between the support plate 23a and the support block 23b due to a further cam surface 48b which strikes and is thus stopped. At this time, the cam 48 will again turn into the yarn YB determined by the second stop 35 by means of parts with hooks 17c, 18c in the vicinity of the io position. In this case, the first stop 34 has already been moved to the rest position of the guide ends of the rotatable guides 17, 18, as in FIG. H. is seen in one position, and after completion of the yarn splicing behind the second stop 35, namely by the effect of the process, a test process of the detector device 8 is released. Cam 39 is released in particular by the rotary movement of the. Lever 32 to the second stop35, the size or the

The yarn splicing element 101 is substantially 15 in length from yarn ends to be pulled out of nozzles, i.e. H. the

The center point of the yarn splicing device 12 arranged length, with which the yarns overlap in the yarn splicing device and on opposite sides of the yarn splicing element, is determined. When the twisting movement of the yarn

mentes 101 are usual yarn end control plates 25, 26, a lever is set larger, takes the length of the

Yarn holding device 102, untwisting nozzles 103, 104, yarn ends to be pulled out, and thus the length or guide plates 27a, 27b and guide rods 28a, 28b, yarn cutting distance is reduced over which the yarn ends overlap one another.

Devices 106, 107 and fork guides 29, 30 are pre-lapped.

hen. The yarn movement lever 105 is on one side of the yarn splicing element 101 in FIGS

Yarn splicing device 101 arranged and has one to 13 shown. The yarn splicing element 101 is on (53)

Pin 31 and lever 32,33, which are rotatably screwed and mounted on the pin 31 a bracket 52 via a front plate 51. After the yarn ends YP, YB, due to 25, has a cylindrical yarn splice opening 54, which is attached to its center while detecting a thickening or the like of the yarn

Yll by the detector device 8 by cutting the also has a slot 55 formed therein, which in

Y11 yarns with a cutting device, not shown, extending in a tangential direction from or along the full length which separated by the action of the suction opening 10 and the yarn splice opening 54 in such a way

Transfer tube 11 in a position outside the yarn splicing 30 that the insertion of the yarns YP, YB from the outside into the solution device, the yarn ends YP, yarn splicing opening 54 is facilitated. The yarn

YB led to the yarn splicer 12. The splice element 101 also has air jet nozzle openings.

The range of the rotational movement of the yarn movement lever 105 is determined by openings 56, 57 which are produced by bores and are determined by a stop 34 which open between the fork guide and which open tangentially to the yarn splice opening 54.

tion 29 and the yarn clamping part 108 is arranged. 35 It should be noted that the yarn splice shown in Fig. 13

The stop 34 has a yarn splicing nozzle unit 58 for movement between two position elements 101.

arranged, and the position in which the yarn movement, which is detachably mounted there and in which is stopped at 105 by the stop 34, a fixed yarn splice opening 54 is formed. An execution

Position, the stop 34 then being used for the yarn movement shape of a yarn splicing nozzle in FIGS

lever 105 takes effect when a thread cutting operation from 40 to 16 is shown. In particular, the yarn splice nozzle

Yarn cutting device is executed. As shown in FIG. 9 for unit 58 essentially a cylindrical configuration and see, another stop 35 for adjusting the length has a cylindrical yarn splice opening 54 and two of the overlapping portions of the yarn ends. In particular, air jet nozzle openings 56, 57 which point tangentially to the latter, see FIG. 9, the first stop 34 open one at a yarn splice opening 54 and are arranged in this way,

End of a lever 37 arranged block 38, for a 45 that they open in such positions that from the

Rotary movement around a fixed pin 36 between two positions, air flowing in openings in the opposite direction of rotation

is provided. The stop 34 is guided by a rod 40 gene. The nozzle orifices 56, 57 open which is actuated, which is connected to a control cam 39 in such a way as to an air path 59 which is around the nozzle 58 so that it moves, as shown in FIG. is trained. In the state in which the nozzle 58 is fitted into a rest position and a further rest position in a yarn splicing element 101, the path has a certain angular distance in the direction of the arrow marking 59 with an outer wall side of a nozzle receiving opening

41 can be recorded from the operating situation. If one together that is formed in the yarn splicing element 101

Thread cutting operation from the thread cutting devices 106, det and the upper and lower flange parts 60 of the nozzle

107 has been performed, then the yarn is moved to form a closed path. The way 59

lever 105 in a position against a first stop 55 is partially connected to an air supply path 61, derin

34. is formed by the length or distance from a clamping point to the yarn splicing element 101. The two

to keep the extreme end of a yarn end constant. Meanwhile, separately arranged air jet nozzle openings 56, 57 correspond to

the second stop 35 is connected with an adjusting lever 43 to the points of application of the rotary flux C1, C2 in FIG.

that which is arranged for a rotary movement around a fixed pin 42 1, and the direction of rotation of a rotating air flow from the. As seen in Fig. 10, a pin 44 is fixed on the 60 nozzle opening 56 corresponds to the direction ZI, while the

The underside of the lever 43 is mounted and arranged in such a way that it can optionally engage in the direction of rotation of a rotating air flow from the other in the positioning bores 45a to 45n, the nozzle opening 57 corresponds to the direction X2, so that one of the along an arcuate line of the guide plate 24 Fig. 1st appropriate arrangement is maintained,

are arranged in order to selectively the position of the second connection. A yarn splicing nozzle shown in FIGS.

to be able to determine total 35. Sensor unit 62 is another embodiment of the invention

If a cam 46 is in the direction of the arrow marking and has nozzle openings 63, 64 which are in one with respect to one

47 is moved, there is a possibility that a rod 49 is inclined in the axis of the yarn splice opening 54

Direction of a further arrow marking 50 are formed by a Nok, so that a nozzle opening 63 to a

End surface 65 of one opening is inclined, while another nozzle opening 64 is inclined towards the other end surface 66 of the opening, the inclinations of both nozzle openings 63, 64 being equal to one another. The nozzle openings 63, 64 are arranged in a spatial separation such that it is sufficient to prevent air streams flowing in from there from interfering with one another. Furthermore, the distance 11 between the opening end surfaces 65, 66 and the points 67, 68 on the wall surfaces of the nozzle openings 63, 64, which are initially acted upon by the air streams injected from the nozzle openings 63, 64, must be greater than © and must necessarily be are of sufficient size so that sufficient rotating air flows can be ensured within the yarn splice opening, d. H. a sufficient amount of rotational movements of the air can be ensured to carry out the intended splicing of yarns. If the distance 11 is too short, then air streams injected from the nozzle openings 63, 64 will escape directly from the inside of the yarn splicing opening and make the intended splicing of the yarns impossible.

Due to the aforementioned inclination of the nozzle openings 63, 64 in the direction of the end face of the opening, the possibility of causing the rotating air streams to catch the end pieces of the yarn ends that lie outside the yarn splice opening is improved, and accordingly a rotational force can be exerted on the overlapping ends Ends of the yarn ends. As a result, a connection can be achieved uniformly over the entire length of the overlap of the yarn ends and it is possible to avoid the formation of so-called antennas that extend from the surface of a spliced connection

thus contributing to an improvement in yarn tenacity.

FIGS. 20 to 22 show a further embodiment of a yarn splicing nozzle, in which the distance 12 between air jet nozzle openings 70 and 71, which run in a respective inclined relationship in the direction of opposite ends of the yarn splicing opening 54, is substantially increased, so that the nozzle openings 70, 71, which are directly adjacent to one another, are formed in such a shape that they have an axial spacing of 12 in an inner circumferential surface of the yarn splicing opening 54 in order to prevent air flows flowing in from the nozzle openings 70, 71 from interfering with one another. Accordingly, air flowing in from the nozzle openings 70, 71 will actually form a rotational force for the splicing and thus contribute to promoting a yarn splicing effect and the formation of a spliced connection.

FIGS. 23 to 25 show a further embodiment of a yarn splicing nozzle, in which a nozzle opening 73 of a yarn splicing nozzle unit 72 is arranged at right angles to an axis of a yarn splicing opening 54, while another nozzle opening 74 is inclined to the axis of the yarn splicing opening 54 so that a rotating air flow generates can be directed towards an end face of the opening. The nozzle opening 73 has a smaller diameter than the other nozzle opening 74. In this case, a yarn splicing effect is mainly obtained from air streams from the nozzle opening 74, but since a turning force of a yarn end near the upper end of the opening becomes rather weak, air from the nozzle opening becomes additional 73 injected to promote the rotational effects of the upper yarn end around the other yarn. As a result, the spliced connection thus created has uniform rotations over the entire area of the connection and, accordingly, no relatively soft part.

However, it should be noted that all of the gusset splice nozzle units 58, 62, 69 and 72 are described in the above description 665 619

exercise have a pair of nozzle openings which, in tangential positions next to the slot for the insertion of the yarns, have openings which are opposite one another as seen from above: this is because, on the one hand, air currents flowing in from the nozzle openings 57, 64, 71 and 74 may possibly do not flow out of the slot 55, air streams flowing in from the other nozzle openings 56, 63, 70 and 73 may possibly flow out of the slot since the direction of these air streams coincides with the direction of the slot, and accordingly, thanks to an arrangement in which the inflowing air streams from the nozzle openings 56, 63, 70, 73 are initially guided linearly over the position of the slot, so that air streams rotating along the inner peripheral wall surface of the yarn splice opening can be interrupted by these linearly advancing air streams, so that air can escape reduced the slot as much as possible.

Furthermore, it is also possible to arrange a pair of nozzle openings 56 and 57,63 and 64,70 and 71 or 73 and 74 on the same side with respect to a plane which contains the center of the yarn splice opening. In particular, as shown by means of a yarn splicing nozzle unit 75 according to FIGS. 26 to 28, the nozzle openings 76 and 77 are arranged on the same side. In this case, the installation of a supply line 78 for supplying compressed air to the nozzle openings 76, 77 becomes easier than in the cases described above. This is because after the nozzle openings are aligned in opposite directions to one another, there will then be a time delay between the fluid injections from the nozzle openings 76, 77,

for example, when the compressed air supply path 61 is formed in the manner shown in FIG. 13. It should be noted

that the cross sections of the supply path 61 and the air path 59 around the nozzle 58 according to FIG. 13 are identical.

In FIGS. 11 to 13, control plates 25, 26 are screwed on opposite sides of the yarn splicing element 101 with spacers 79, 80 arranged between them. The control plates 25, 26 are each arranged such that a certain side edge 25a or 26a crosses part of the opening of the yarn splicing opening 54. Of the control plates 25 and 26, the upper control plate 26 is equipped so that it can control a yarn YP which extends towards a package, while the lower control plate 25 is equipped to control a yarn YB running out of a bobbin. Accordingly, the control plate 26 is arranged on the side opposite the nozzle opening 56, while the other control plate 25 is arranged on the side opposite the other nozzle opening 57.

In particular, the control plates 25, 26 cooperate with the yarn pressing device 102, which will be described later, in order to bring two yarns inserted in the yarn splice opening 54 into a position in which they touch, so that the air flows in one Aligned in such a way that they ensure a first connection of the two yarn ends when air flows in, thereby preventing untwisting when both yarns are turned in different ways; and to control the amount of air flowing out of openings at opposite ends of the yarn splice opening 54, to further prevent the yarn ends from jumping out of the yarn splice opening 54, to control the rotational movement of the jammed original yarns, and to help ensure that the yarn end portions each be adequately wrapped around their counterparts. When the yarn ends YP, YB in particular are acted upon by inflowing air, a balloon is produced. If the rotational frequency of such a balloon increases, fibers near the neck of the balloon will become detached due to the yarn spinning action of the balloon, which increases the likelihood of yarn tears accordingly. Taking this into account

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Circumstances, control plates 25, 26 are provided to regulate the speed of rotation of a balloon, which is suitable for splicing yarns.

Furthermore, the yarn pressing device 102 is so arranged. that it extends along opposite sides of the yarn splicing element 101, see FIGS. 6, 8 and 11, provided in connection with the rotational movement of the yarn movement lever 102, as described above, for the yarn ends YP, YB, which were opened by the yarn end untwisting nozzles 103, 104, pull out of the end twist nozzles 103, 104 and bring the yarn ends YP, YB into a position within the yarn splice opening 54 of the yarn splice element 101 and further control the relative positions of the yarns YP, YB in cooperation with the control plates 25, 26. In addition, the yarn pressing device 102 has the function, in cooperation with guide rods 28a, 28b, which will be described in the following, to bend yarns between the clamping points thereof and the yarn splice opening in order to prevent the spreading of untwisting effects.

The yarn pressing device 102 has a pair of yarn holding plates 83a, 83b connected to a lever 82 which is mounted for rotation about a pin 81 mounted at a fixed location as shown in Fig. 6. Accordingly, when a rod 84 is operated by a control cam, not shown, as shown in Fig. 8, the yarn hold-down plates 83a, 83b are rotated. As further seen in Fig. 29, the yarn hold-down plates 83a, 83b are bifurcated toward their ends and accordingly have the same configuration. The yarn hold-down side edges 85a, 85b of the yarn hold-down plates 83a, 83b function in their upper positions above the front plate 51, which is connected to the yarn splicing element, so that the yarns cannot be jammed between the yarn hold-down plates 83a, 83b and the front plate 51.

The twist end twist nozzles 103 and 104 arranged on opposite sides of the twine pressing device 102 have the same structure, and accordingly only one nozzle 103 will be described with reference to FIG. 30. In particular, a yarn end YP1 to be spliced is introduced on the yarn body side into a nozzle opening 86 with a circular cross section, which was formed in a bracket 52 in the form of the yarn splicing opening 54. This introduction of the yarn end YP1 into the nozzle opening 86 takes place through the suction effect of the already mentioned suction pipe 3, which is connected to it by a hose 87. After the yarn end YP1 is inserted into the nozzle opening 86, air is injected from an air nozzle opening 88 which opens obliquely to the nozzle opening 86 to untwist the yarn end YP1 and to bring the fibers of the yarn end into a parallel position. It should be noted that the air nozzle opening 88 is preferably drilled tangentially with respect to an inner circumferential surface of the nozzle opening 86, so that rotating air streams are generated in a direction opposite to the direction of rotation of the yarn end. Air is fed into the air nozzle opening 88 through a connecting bore 90 from a pipe 89 connected to the above-mentioned line 14.

It should be noted that the length of a yarn end to be opened depends in each case on the position of an opening of the air nozzle opening 88 to the nozzle or in other words on the distance of the opening from the opening surface at the tip of the nozzle. Accordingly, it is desirable that the position of the opening of an air nozzle opening can be adjusted depending on the various conditions, for example yarn types with fibers of larger or smaller average length, or otherwise so that the most favorable untwisted states of the overlapping parts of the yarn ends in the yarn splice opening of the yarn splice element can be achieved.

With this aim, a sleeve 91 is provided for the forward and backward movement.

Guide means connected to the front plate 51 are then described with reference to FIGS. 11, 31 and 32 5. The guide plates 27a, 27b lie on a center line of the yarn splice opening 54 and are attached upright to the front plate 51. As can be seen in FIG. 11, the guide plates 27a, 27b are arranged in such a way that a suction force of the end twist nozzles 103, 104 of parts Y 0, YB not to be sucked in cannot influence. Furthermore, the guide plates 27a, 27b each have a guide rod 28a or 28b, which is fixedly arranged on a side surface thereof at a certain distance from the upper surface of the front plate 51. The guide rods 28a, 28b extend to 15 opposite side edges of the front plate 51 in a parallel arrangement to the upper surface of the front plate 51 and are bent there in an L-shape and their ends are fixedly mounted on the front plate 51. Accordingly, the yarns YP, YB which are inserted into the yarn splice opening 54 by the yarn moving lever 105 take a path separate from the front plate 51 while being caught by the guide bars 28a as shown in Fig. 32. In particular, as described above, the guide rods 28a, 28b cooperate with the yarn pressing device 102 during a yarn splicing process to create a curved formation of yarn sections between the yarn splice opening 54 and the clamping devices 108, 109 and thus the spreading of an untwisting action of a rotating fluid flow to prevent within the yarn splice opening.

Reference is again made to FIGS. 5, 6 and 8. The thread cutters 106, 107 are disposed within the guide plates 29 and 30, respectively, and each have a fixed blade 92 and a movable blade 93. When a rod 27, as shown in FIG. 6, is acted upon by a control cam, not shown, a forked lever 95 is rotated in a clockwise or counterclockwise direction about a pin 96. After this rotation of the forked lever 95, a fork part 97 moves a support pin 98 at the opposite end of the movable blade 93, whereby the movable hinge 93 is rotated about a pin 99.

Furthermore, the fork guides 29, 30, which are arranged outside the yarn cutting device 106, 107, have guide grooves 29a and 29b, 30a and 30b, as can be seen in FIG. 45. In addition, the yarn movement lever 105 arranged on a side part of the yarn splicing element 101 is rotated in a clockwise direction - see FIGS. 6 and 8 - by a control cam (not shown) via a rod 31a around the pin 31 in order to insert the yarns YP, YB into the guide grooves 29a, 29b, so 30a and 30b and then through the slot from the inclined surface of the yarn splicing element into the yarn splicing opening 54.

A yarn splicing process in the yarn splicing device will now be described in detail.

55

(A) Preparation and yarn pinching step

1 is referred to. If the detector device 8 detects that a yarn breaks during rewinding or that the yarn on a bobbin has been used up, the drum 9 stops 60 and a single rotary coupling, not shown, acts to rotate a shaft. This actuates various control cams which are provided on or in connection with the shaft in order to carry out an intended yarn splicing.

65 First of all, the suction mouth 10 and the transfer pipe 11 are rotated by the respective phantom layers 10a, IIa of FIG. 1 with a sucked-in yarn end and run in this way over the yarn splicing device 12,

665 619

that the yarn YP on the side of the package P and the yarn YB on the side of the bobbin intersect and stop in a position outside the yarn splicer.

In particular, after the action of the suction mouth 10 and before the start of the transfer tube 11, the yarn clamping device 109 acts on the yarn body side in such a way that the yarn YP is clamped between the rotary lever 20 and the carrier block 21 and the yarn in guide grooves 19 of the fixed guide 16 and the rotatable guides 17, 18 next to the detector device, which then carries out the inspection of the game YP io. The rotatable guides 17, 18 are then rotated to the respective phantom positions 17-1, 18-1 around the pin 22 in order to remove the yarn YP from the detector device 8 and to receive it in relief grooves 17b, 18b thereof. 15

Then the transfer pipe 11 sucks in the yarn YB on the bobbin side B and is rotated to a position outside the splicing device 12. In this case, the yarn YB runs through the sections with hooks 17c, 18c of the rotatable guides 17, 18 and is clamped between the support plate 23a and the 2o support plate 23b of the yarn clamping device 108, as can be seen in FIG. 11.

25th

30th

(B) Yarn movement and cutting process step

After completing the yarn clamping process step, the inFig. 5 and 11, levers 32 and 33 of the yarn movement lever 105 are rotated about the pin 31 to separately guide the yarns YP and YB on opposite sides into the guide grooves 29a, 29b and 30a, 30b of the fork guides 29 and 30, respectively, and into the yarn splice opening 54 of the yarn splicing element 101 through the slot 55 provided there.

Then, the yarn cutters 106, 107 operate to cut the yarns YP2, YB2 at locations 35 a predetermined distance from the clamps 108, 109, as seen in Fig. 11. The location of the yarn at which it is cut depends on the length of a spliced connection to be obtained by the intended splicing and has an influence on the appearance and the 4Q strength of the spliced connection produced and also depends on the thread number. It's getting fig. 33 Referenced. The yarns YP, YB on opposite sides of the yarn splicing member 101 are jammed on the yarn clamp 108, the yarn moving lever 45 105 is operated, and the rod 31a shown in Fig. 8 is operated by a control cam (not shown) to move it in the direction of an arrow mark 31b to turn levers 32, 33 clockwise around pin 31. A thread cutting process is carried out in this position. It should be noted that after 5 () the actuation of the yarn movement lever 105 and the cutting device 106, 107, the yarn pressing device 102 is kept ready in the semicolon position 102a of FIG. 8a.

(C) Step of untwisting the yarn end 55 Then, at the same time or shortly before or shortly after the yarn ends YP 1, YB 1 are sucked into the yarn unwinding nozzles 103, 104, as shown in Fig. 34, the yarn moving lever 105 is moved in a direction R of is moved away from the yarns, and as a result, the yarn ends YP1, YB 1 are sucked into the inside of the yarn unwinding nozzles 103 and 104, respectively, after which air is admitted as described above to untwist the yarn ends YP1, YB1 so that they are in one prepared for the subsequent splicing of the same. 65

It should be noted that the process of sucking the yarn through the twist-off nozzles 103, 104 is preferably just before a yarn cutting process through the cutters

106,107 takes place. This is because, when the yarn is cut, a tensile force is applied to the yarn due to the suction effect of the suction mouth and the transfer pipe, and accordingly the yarn ends YP1, YB1, which are no longer held by the cutting, would be in certain positions in the Fly away near the openings of the opening nozzles 103, 104, which would lead to failure of the intended suction operations of the opening nozzles. It should be noted that the air can be brought up to the opening nozzles by reversing a valve by means of a solenoid (not shown).

(D) Yarn splicing process step

After the yarn ends YP1, YB1 have been turned up into a state which is suitable for the subsequent splicing through the yarn end untwisting nozzles 103, 104, the operation of the untwisting nozzles 104, 103 and thus the suction effect via the hose 87 or the air nozzle opening 88 is stopped. Simultaneously or shortly before or shortly after such a stop, the yarn movement lever 105 is actuated again in order to feed the yarn ends YP1, YB1 in such a way that they are pulled out of the untwisting nozzles 103, 104 and that the yarn ends thus opened are in a specific position in the yarn splicing element, as in FIG Fig. 35, lie one on top of the other. Then one of the levers 32 and 33 of the lever 105 is brought into a position where it abuts the stop 35, and the yarn pressing device 102 is then operated to be rotated into a position as shown in Figs. 35 and 32, thereby cooperating with parts of the yarns YP, YB between the yarn splice opening 54 and the clamping devices 108, 109 or more precisely, between the yarn splice opening 54 and the yarn movement levers 32, 33 are given a curved configuration to the yarn hold-down plates 83a, 83b and the guide rods 28a, 28b. The yarn ends YP1, YB1, which were inserted into the nozzle openings of the untwisting nozzles 103, 104, are then guided through the yarn movement lever 105 and the yarn holding device 102 into the yarn splice opening 54 of the yarn splice element 101 and then by means of the control plates 25, 26 and the yarn pressing device 102, as in FIGS Figures 12 and 13 shown, brought into a position in which they touch.

After positioning the yarn ends, compressed air is injected from the air jet nozzle openings 56, 57 of FIG. 13 in order to carry out the yarn splicing with rotating air jets in accordance with the principle described with reference to FIG. 1. In particular, the yarn end YP is clamped in one position of a clamping point Kl, and the outermost end B1 is released while the other yarn end YB is clamped in a position corresponding to the clamping point K2, and an end piece AI is also left in a free state. In this position, the yarn ends YP, YB are acted upon at rotation application points of the rotating air streams which are directed in opposite directions to one another. In one case, as shown in Fig. 1, the particular twist of the yarn Y is a Z twist, and accordingly the rotating air flows must necessarily be in directions opposite to the arrow marks XI and Z2. However, if a yarn has to be spliced. where the typical rotation is an S rotation, the directions of the rotating air streams are of course reversed.

A spliced joint obtained in this way has an actual twist in the same direction (Z) as the direction of the particular twist of the yarn over its entire area, as can be seen in FIG. 2. and the fibers are intertwined to form a twisted single yarn.

665 619

10th

Results from experimental comparisons of spliced. Yarns obtained in this manner with related or similar yarns in terms of strength, elongation, number of twists, etc. are given below.

The test was carried out under the following test conditions: A cotton Ne 40 worsted yarn is used. A nozzle such as that shown in FIG. 13 and FIGS. 14 to 16 is used for the yarn splicing element; the air pressure from a jet nozzle is 5.5 105 Pa.

(c) Number of turns

Direction of rotation maximum (rotation / cm) minimum 10 average

Connection,

9.25

7.9

8.95

Related yarn

After examination unchanged

9.55 8.85 9.12

97.8%

(a) Yarn size

connection

Related yarn

After examination unchanged

Sample quantity

513

513

Maximum (g)

295

303

Minimum (g)

148

162

Average (g)

201.2

228.3

88.1%

Fluctuation (%)

10.2

98

(b) stretch

20th

connection

Related

After exam

Yarn unchanged

Sample quantity

513

513

maximum

(mm / 500mm)

26

27th

minimum

15

16

average

20.5

22.2

92.2%

fluctuation

9.3

7.65

It should be noted that even another experiment conducted under the same conditions except that a cotton Ne 7 worsted yarn was used has yielded results according to which the maintenance rate of the yarn tenacity 13, Is 1% and the maintenance rate of elongation is 81.8%. According to the method described above, a splicing of yarn is possible for a wide range of yarns from a thin yarn to a thick yarn.

According to the results of the tests, the spliced connections obtained have high maintenance percentages in strength, elongation, number of twists and twist direction with respect to related yarns, and accordingly have characteristics which are similar to those of individual yarns.

As can be seen from the above description, the ends of two yarns, which were inserted into a yarn splice opening in an opposite and mutually overlapping arrangement, are then released, and at least the above-mentioned overlapping parts of the yarn ends in the yarn splice opening are turned on two different points are acted upon by currents of fluid rotating in opposite directions. The spliced connections thus obtained accordingly have an actual twist in the same direction as the direction of the typical twist of the original yarn and have a structure very similar to that of the original yarn. 40 According to the invention, spliced connections can accordingly be obtained which do not deviate very much from their original yarns in terms of yarn strength, elongation, number of turns, etc.

M

8 sheets of drawings

Claims (12)

665 619 PATENT CLAIMS 1. A method for splicing spun yarns, in which the outermost ends of two yarn ends, which are inserted in an overlapping and oppositely directed arrangement in a yarn splicing opening, are spliced together by being pressurized by compressed air, characterized in that the said outermost ends of the two yarn ends are in a free state and that at least two sections of the said yarn ends, which are arranged in the spliced opening in such a way that they overlap, are individually acted upon by compressed air streams rotating in opposite directions in such a way that they are opened individually. 2. The method according to claim 1, characterized in that said extreme ends of two yarn ends are unscrewed and that each yarn is clamped at a predetermined fixed distance from the extreme yarn end. 3. The method according to claim 1 or 2, characterized in that the said directions of rotation are determined in accordance with the twist directions typical for the yarns to be spliced and that the direction of rotation is selected so that it corresponds to the direction in which between the clamped point of the yarn and the typical twist of the yarn section due to the rotation of the yarns is released or untwisted to the fulcrum. 4. Apparatus for carrying out the method according to claim 1, with a yarn splicing element (101) having a yarn splicing opening (54) into which an air jet nozzle opens; End twist nozzles (103, 104), which are arranged in the vicinity of both ends of the yarn splicing opening (54), for sucking in and untwisting the yarn ends on the side of the package or on the side of the package; a yarn movement lever (105) which is arranged on one side of the yarn splicing element and has a pin (31) and levers (32, 33) rotatably mounted on this pin; Yarn cutting devices (106, 107) which are arranged on the bobbin side and the yarn body side of the yarn splicing element (101); and with clamping devices (108, 109), which are each arranged outside the devices mentioned above and clamp the yarns on the side of the package or the spool, characterized in that said yarn splice element (101) has a cylindrical yarn splice opening (54) drilled through a structural part of the yarn splice part. , a slot (55) which is arranged along and communicates with the yarn splicing opening in order to introduce the yarns to be spliced and has two air jet nozzle openings (56,57) which open tangentially into the yarn splicing opening (54) and are arranged in this way, that they open at such points, that it is caused that compressed air flowing in from the air jet nozzle openings is guided in opposite directions of rotation. 5. The device according to claim 4, characterized in that said splicing element (101) has a structural part and a substantially cylindrical nozzle unit (62) which is removably attached there and in which said yarn splicing opening (54) is formed, and in that a flow path (59) is formed around the cylindrical nozzle unit, said flow path being connected to said air jet nozzle openings (56, 57) and a supply path (61) for compressed air formed in the nozzle body. 6. The device according to claim 4 or 5, characterized. that said air jet nozzle openings (56, 57) open at right angles to the axis of the yarn splicing opening (54). 7. The device according to claim 6, characterized in that said air jet nozzle openings (56,57) open into an outer wall of the splicing opening opposite the axis of the splicing opening (54). 8. The device according to claim 6, characterized in that said air jet nozzle openings (56,57) related 5 open onto the axis of the splice opening (54) on the same outer wall of the splice opening. 9. The device according to claim 4 or 5, characterized in that the air jet nozzle openings (70, 71) are arranged inclined with respect to the axis of the yarn splicing opening (54). io net and are formed at a distance that is sufficient to prevent the inflowing compressed air flows from interfering with each other. 10. The device according to claim 4 or 5, characterized in that a first air jet nozzle opening (56) with respect 15 of the axis of the yarn splice opening (73) is arranged in a vertical arrangement, while a second air jet nozzle opening (74) is inclined with respect to the axis of the yarn splice opening (54) and the first air jet nozzle opening has a smaller diameter than the second air jet 20 nozzle opening (74) . 11. The device according to claim 4 or 5, characterized in that yarn end control plates (25, 26) are screwed onto opposite sides of the yarn splicing element (101), spacers (79, 80) being arranged between them. 25 and in that one of the control plates is arranged on the side opposite the closer air jet nozzle, while the other control plate is arranged on the opposite side opposite the other air jet nozzle opening. 12. The device according to one of claims 4 to 11, characterized in that the said device additionally a A pair of guide means having a guide plate (27a, 27b) which is located near the end twist nozzle (103, 104) on a center line of the yarn splice opening (54) and is arranged upright on a front plate of the splice device so that a suction force the end twist nozzles cannot influence the parts of the yarn not to be sucked in, and further by a guide rod (28a, 28b) which is fixedly mounted 40 on a side surface of the guide plate (27a, 27b) from the upper surface of the front plate (51) and extends parallel to the top surface of the front panel toward the side end of the front panel. 45