CN115595700A

CN115595700A - Warping device and method for producing partial warps in yarn sheet

Info

Publication number: CN115595700A
Application number: CN202110772225.9A
Authority: CN
Inventors: M·本德; A·凯勒
Original assignee: Carlmeyerstol R & D Co ltd
Current assignee: Carlmeyerstol R & D Co ltd
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2023-01-13
Also published as: EP4116473B1; EP4116473A1

Abstract

The invention relates to a warping device and a method for producing partial warps in yarn sections, in particular to a warping device with a warping drum, a yarn section supply path and a partial warp device (1), wherein the partial warp device (1) has a shed forming device in the yarn section supply path and a partial strand insertion device (8) with which partial strands (5, 10) can be inserted into sheds (4, 9) formed by separated yarn sections (2, 3). It is desirable to achieve high productivity of warping machines. For this purpose, a strand separation device (12, 13) is arranged laterally next to the thread sheet path.

Description

Warping device and method for producing partial warps in yarn sheet

Technical Field

The invention relates to a warping device with a warping drum, a thread supply path and a warp dividing device, comprising a shed forming device and a partial strand insertion device in the thread supply path, by means of which partial strands can be inserted into sheds formed by separated thread pieces.

The invention further relates to a method for producing a partial warp in a thread package, in which a first shed is formed by splitting the thread package, a partial strand is inserted into the first shed by a strand insertion device, a second shed is formed by splitting the thread package, the partial strand is inserted into the second shed by a strand insertion device, and the partial strands are connected to one another next to the thread package.

Background

In the case of warping of yarns to warp (sette), yarn sheets (fadensbear) are usually formed in that a defined number of yarns are simultaneously pulled off a reel, which is arranged in a creel (Gatter). These yarns are guided by a sectional reed (Geleseblatt) and, if possible, further reeds and are held there in a defined sequence. The yarns thus classified were wound up on warping drums (Sch 228rtrummel). At a predetermined pitch, typically about all 500 to 2000m of travel length of the yarn sheet, a fractional warp (Fadenkreuz) is brought into the yarn sheet. For this purpose, a first shed (Fach) is formed in such a way that every second thread, for example a thread piece, is lifted so that the threads lying alternately next to one another have a spacing in the direction perpendicular to the thread piece. A separator (Kreuzschnur) is inserted into the first shed. The second shed is then formed by lifting the previously non-lifted yarn while the previously lifted yarn remains in its non-lifted position. And the stranded wires are put into the second shed. The two partial strands are connected to one another in order to fix the threads in the sliver relative to one another.

In the case of a warp split, the warping drum must be stopped. The warping process must be interrupted. The time required for the generation of the partial warp is not used for the winding, i.e. the actual generation of the warp threads.

DE 42 23C or likewise DE 44 43 627 C2 discloses the use of a stranding device for stranding. However, there is still a need for an operator who is not always available, so that the warping process can only be continued after the intervention of the operator, which again can involve a loss of time.

Disclosure of Invention

The invention is based on the object of achieving a high productivity of a warping machine.

This object is achieved in a warping device of the type mentioned at the outset in that a partial strand splicing device is arranged laterally next to the thread path.

The connection of the partial strands can be automated after insertion by means of the partial strand splicing device, so that the entire generation of partial warp threads in the thread sheet can be automated. A part strand or several part strands are automatically introduced into the shed in the thread package and, after they have been guided through the thread package, are likewise automatically connected to one another. It is therefore no longer necessary for the operator who makes the connection to be available. The waiting time is accordingly dispensed with. Likewise, only slightly lower requirements are placed on the qualification of the operator.

In a preferred embodiment, it is provided that the strand splicing device is designed as a strand knotting device. The stranded wires can be knotted to each other by the stranded wire knotting device, so that a reliable connection can be produced between the stranded wires.

In a preferred embodiment, it is provided that the position of the partial strand splicing device in a direction perpendicular to the running direction of the thread pieces can be set in the thread piece path. The position of the splitting splicing device can thus be adapted to the width of the sliver. The material consumption for the split strand can be kept low. The split strands must be made only slightly longer than the width of the sliver.

Preferably, the split strand joining device is positionable by means of a sliver edge identification device. The positioning of the strand splicing device can thus also be automated. The setting operation can be carried out quickly and accurately in the first place.

Preferably, the strand inserting device comprises: a first gripper movable into the shed from a first side; and a second gripper movable into the shed from a second side opposite the first side. In this embodiment, it is not necessary for the partial strand insertion device to grip the entire width of the sliver.

Alternatively or additionally, it can be provided that the strand insertion device has an air blowing device and/or an air suction device. The split strands can then be transported through the shed by means of air.

Preferably, a partial strand holding device is arranged on at least one side of the sliver path, said partial strand holding device having two clamping devices on a carrier, which carrier can be rotated about an axis arranged between the clamping devices. The working of such a stranded conductor holding device can be described, for example, as follows: the split strands are pulled down by a reel and placed into two clamping devices. The section of the untwisting wire located between the two clamping devices is then loaded in order to insert the untwisting wire into the shed. In this case, in the first half of the movement, the clamping device adjacent to the reel is released. The other clamping device remains stationary. When the partial strands have reached the middle of the shed with respect to the width direction of the thread pieces, the clamping device arranged adjacent to the winding shaft is activated and then holds the partial strands securely, while the other clamping device is released, so that the free ends of the partial strands can be guided through the shed. Once the partial strands have been guided through the thread sheet, they are separated on the side of the clamping device facing away from the winding shaft. When the carrier is then rotated by 180 °, the initial position described above is established again. Likewise, the preparation of the stranded conductor can then be automated.

In this case, the position of the partial strand holder in a direction perpendicular to the running direction of the thread piece can preferably be set in the thread piece path. Likewise, the partial strand holder can then be adapted to the width of the sliver.

The strand tying device preferably has a yarn gripper which can be rotated about a sleeve and which acts on the end section of the strand to be tied, wherein the sleeve has a longitudinal slot and an air suction tube is arranged in the sleeve, which air suction tube generates a negative pressure in the region of the longitudinal slot and which air suction tube is movable. The yarn gripper guides the ends of the two partial strands to be knotted around the bushing. The suction tube draws these ends through the longitudinal slit and as the suction tube moves, it pulls these ends through the loop that has been formed around the liner. Whereby a knot appears.

The warping drum is preferably connected to a control device, which likewise controls the warp dividing device, wherein the control device stops the warping drum in different angular positions during the insertion of the different partial strands. This prevents the partial strands from collecting on the warping drum at winding angles which are multiples of 360 °. Such a build-up would for example lead to an increased imbalance and thus to an impairment of the winding speed. Also the productivity can be kept high.

The invention is also solved by a method of the type mentioned at the outset in that the partial strands are connected to one another by a partial strand splicing device.

The time required for generating the minutes can be kept small. It is no longer necessary to wait for the operator to make the connection of the split wires. It is also always ensured that the quality of the split is kept the same.

Preferably, a split-strand knotting device is used as the split-strand splicing device. The connection between the stranded wires can thus be realized as a knot. Knotting is a reliable connection.

Preferably, the position of the strand separation device is adapted to the width of the sliver. The material consumption for the twisted pair can be kept low, which is favorable for cost.

Preferably, the yarn sheet edge is acquired by the yarn sheet edge recognition device and the position of the split-strand wire jointing device is set according to the output signal of the yarn sheet edge recognition device. The adaptation of the strand splicing device to the respective width of the thread pieces can likewise be automated accordingly.

Preferably, the warping drum is stopped in different angular positions in order to generate a partial warp. Thus, it is avoided that the bunches of partial strands are located on the warping drum at integer multiples of 360 °.

Drawings

The invention is described below with reference to a preferred embodiment in conjunction with the accompanying drawings. Wherein:

figures 1a-1d show schematic diagrams of generating a meridian,

figure 2 shows the partial strand holding device in a top view,

figure 3 shows the stranded conductor holding device in a side view,

figure 4 shows a side view of the split strand implanting device,

figure 5 shows the strand insertion device in a plan view,

FIG. 6 shows a side view of the split strand knotting apparatus, and

fig. 7 shows a plan view of the knotting device directed towards the stranded conductor.

Detailed Description

Figures 1a-1d schematically show a warp dividing apparatus 1 for producing a partial warp in a sliver. The yarn sheet has a first yarn 2 of the first group and a second yarn 3 of the second group. The first yarns 2 and the second yarns 3 are arranged alternately with each other. The

yarns

2,3 together form a yarn sheet. The yarns extend perpendicular to the plane of the drawing.

The

yarn

2,3 is pulled off a reel, arranged in a creel not represented, and wound up on a warping drum, which is likewise not represented. The warp let-off device 1 is located more closely at the warping tube between the creel and the warping tube, preferably than at the creel.

The

threads

2,3 are guided through a distributor reed, which is likewise referred to as a distributor reed, which is likewise not represented in greater detail. The reed can separate the

yarns

2,3 from each other so that the first yarn 2 is in the raised position and the yarn 3 is in the rest position or in the lowered position. This forms a shed 4 into which the partial strands 5 can be inserted.

Fig. 1a shows that the first yarn 2 and the second yarn 3 are separated from each other and form a shed 4.

The split strands 5 are pulled down by a reel 6 and held under a certain stress, if possible via a pretensioner 7 (fig. 2). The split thread 5 is introduced into the shed 4 by a split thread insertion device 8 (represented in fig. 4 and 5 for an example of this). Once the stranded conductor 5 has been guided through the shed 4 (fig. 1 b), the shed 4 is closed. The second shed 9 is created in such a way that the first yarn 2 and the second yarn 3 are separated from each other again, however in the opposite direction, so that the second yarn 3 is in the raised position and the first yarn 2 is in the lowered or rest position. The split thread 10 is then pulled off again by the other side by the reel 11 and guided through the shed 9. The two

partial strands

5,10 are then situated in the thread sheet in a short sequence in the direction of travel and can separate the first thread 2 from the second thread 3. Finally, the two

partial strands

5,10 must also be connected to one another. For this purpose, a first partial strand joining device 12 is arranged on one side of the

thread pieces

2,3 and a second partial strand joining device 13 is arranged on the opposite side.

Such partial passes are brought into the

thread sheets

2,3 at a predetermined distance, typically in the range of 500 to 2000m travel length.

The position of the split

strand splicing devices

12,13 can be set in the path of the sliver in a direction perpendicular to the travelling direction of the sliver. With respect to the views of fig. 1a-1d, the split-

strand splicing device

12,13 is movable to the left and right in order to match its position to the width of the piece of yarn formed by the

yarns

2, 3.

Furthermore, one or more sensors may be provided, which form a thread sheet edge identification device. The thread edge recognition device can determine where the edge of the thread formed by the

threads

2,3 extends and set the position of the

strand splicing device

12,13 accordingly.

The stranded conductor 5 is prepared by a stranded conductor holding device 14, which is described in more detail with reference to fig. 2 and 3. The stranded conductor 10 is prepared by a stranded conductor holding device 15, the structure of which corresponds to the stranded conductor holding device 14 and which is therefore not described in greater detail.

The stranded conductor holding device 14 has a first clamping device 16 and a second clamping device 17, which are arranged on a common carrier 18. The carrier 18 is rotatable about an axis 19, which is arranged between the clamping

devices

16, 17. The first clamping device 16 is associated with a first separating device 20. The second gripping device 17 is associated with a second separating device 21. Two separating

devices

20,21 are located between the two

clamping devices

16, 17.

The first clamping device 16 may be operated by a first actuator 22. The second gripping device 17 can be operated by means of a second actuator 23. The carrier 18 may be rotated by a rotary drive 24.

Only when a new split wire 5 is used, the split wire 5 needs to be inserted into the two

clamping devices

16, 17. The section 25 of the split thread between the two

clamping devices

16,17 is then ready for being loaded by the split thread insertion device 8 and moved through the first shed 4. In the first half of the movement, the first clamping device 16 is released, so that the stranded wire 5 can be pulled down by the reel 6. Once the split thread has reached the middle of the width of the piece of yarn formed by the

yarns

2,3, the first clamping device 16 activates and fixedly clamps the split thread 5, while the second clamping device 17 does not activate and releases the end of the split thread 5. The partial strands 5 can then be conveyed through the shed 4 over their entire free length. Depending on how much length of the stranded wire 5 is needed on the other side of the sliver in order to make a connection between the ends of the stranded wire, in particular the knots, the activation of the first clamping device 16 and the deactivation of the second clamping device 17 can also be effected slightly outside the middle of the width of the sliver, i.e. before or after the stranded wire 5 has passed the middle of the width of the sliver.

Once the split strands 5 have been conveyed through the shed 4, the first separating device 20 is actuated and the split strands 5 are cut off. When the carrier 18 is then rotated by 180 °, the two

clamping devices

16,17 exchange their positions, so that the open end of the split strand 5 is then held by the clamping device 16 and the split strand travels between the reel and the first clamping device 16 past the second clamping device 17.

Fig. 4 and 5 show possible embodiments of the partial strand insertion device 8. The second stranded conductor insertion device 8 is divided into a first section 26 and a second section 27. The first section 26 conveys the split strands 5 from the split strand holding device 14 into the shed 4. In this case, the first section 26 is driven by a drive 28. The first section 26 has a first gripper 29 which can be actuated by an actuator 30 arranged in the first section 26. The first gripper 29 is pulled back behind the front edge 31 of the first section 26 when the first section 26 is moved into the shed 4. The split wires 5 are carried by the front edge 31.

When the first section 26 has delivered the split line 5 into the delivery position, which, as mentioned above, is located approximately in the middle of the width of the

thread pieces

2,3, the second section 27 takes action. The second section 27 has been moved into the shed 4 by the drive 32. The second section 27 has a second gripper 33, which can be moved by a second actuator 34. The second gripper 33 now moves out of the second section 27 and can pick up the stranded wire 5. The partial strands 5 are then pulled together with the second section 27 through the shed 4, so that the free ends of the partial strands 5 can finally leave the shed 4.

When the second split line 10 is placed, the process proceeds in the opposite direction. The partial strands 10 are taken up through the front side 35 of the second section 27 and are conveyed into the shed 9. In the delivery position, the first gripper 29 can then take up the stranded conductor 9 and the stranded conductor 10 is then pulled completely through the shed 9.

The shape assumed by the stranded-wire insertion device 8 is merely exemplary. It is also possible to use an air flow for transporting the respective

partial strands

5,10 through the

respective shed

4,9 or to then move through a single section 26 of the entire shed 4 in order to insert the partial strands 5 into the shed 4. For inserting the partial strands, the respective partial strand insertion device 8 is moved after the formation of the shed 9 as far as the partial strands 10, which grip and then pull the partial strands 10 through the shed 9.

After the insertion of the two

partial strands

5,10, two free ends are present on both broad sides of the

thread pieces

2,3, which are knotted to one another by means of a partial

strand splicing device

12, 13. The

strand splicing devices

12,13 are preferably designed as strand knotting devices. Fig. 6 and 7 show a strand splicing device 12 configured as a knotting device. The strand splicing device 13 is constructed identically, so that an explanation of itself is saved.

The strand splicing device 12, which is designed as a knotting device, has a thread gripper 36, which can be moved around a sleeve 37. When the gripper 36 is guided around the sleeve 37, it places the ends of the

partial strands

5,10 around the sleeve 37. The bush 37 is of substantially cylindrical configuration and has a slightly conical shape at its ends, at which the

strands

5,10 are guided around its circumference.

The bushing 37 has a longitudinal slit 38. In the sleeve 37, a suction pipe 39 is arranged, which generates a negative pressure in the region of the longitudinal slot 38. As this is represented by the arrow 40, the suction duct 39 is movable.

When the thread gripper 36 is moved around the sleeve 37 and the

partial strands

5,10 are guided around the sleeve 37, the ends 41 of the

partial strands

5,10 are sucked into the longitudinal slot and (because the suction pipe 39 is moved out of the sleeve 37) are pulled through the already formed loop of the thread gripper 36 around the sleeve 37. Thereby forming a knot. The two

yarns

5,10 are thus automatically connected to each other.

As already mentioned above, the position of the splitting-splicing

device

12,13 can be changed relative to the

thread sheet

2,3, wherein the positioning can be automated when the thread sheet edge detection device detects the edge of the

thread sheet

2, 3. In the same way, it is also possible for the partial

strand holding devices

14,15 to be positionable relative to the

thread pieces

2,3, wherein this positioning can also be effected automatically. It is therefore possible to keep the material consumption for the stranded

conductor

5,10 low.

The strand insertion device 8 described in connection with fig. 4 and 5 can also be used with an air flow generating device.

Furthermore, the strand inserting device 1 is synchronized with the warping drum. This synchronization can be carried out in such a way that the

partial strands

5,10 are arranged at different positions in the circumferential direction of the warping drum. It is naturally possible for two or more skeins or skein pairs to be positioned at the same circumferential position of the warping drum. On the other hand, the bunching of the

partial strands

5,10 at the peripheral position of the warping drum is avoided.

Claims

1. A warping device with a warping drum, a yarn sheet path and a warp dividing device (1) with a shed forming device in the yarn sheet path and a partial strand insertion device (8) with which partial strands (5, 10) can be inserted into a shed (4, 9) formed by separated yarn sheets (2, 3), characterized in that a partial strand joining device (12, 13) is arranged laterally next to the yarn sheet path.

2. Warping device according to claim 1, characterized in that the partial strand joining apparatus (12, 13) is configured as a partial strand knotting apparatus.

3. A beaming apparatus as claimed in claim 1 or 2, characterized in that the position of the partial strand engaging device (12, 13) is settable in the thread path in a direction perpendicular to the running direction of the thread.

4. Warping device according to claim 3, characterized in that the partial strand joining means (12, 13) are positionable by means of a thread piece edge recognition means.

5. The warping device according to any one of claims 1 to 4, wherein the partial strand insertion device (8) has: a first gripper (29) which is movable into the shed (4, 9) from a first side; and a second gripper (33) which is movable into the shed (4, 9) from a second side opposite the first side.

6. Warping device according to one of claims 1 to 5, characterized in that the partial strand insertion device (8) has an air blowing device and/or an air suction device.

7. Warping device according to one of the claims 1 to 6, characterized in that at least at one side of the yarn sheet path a partial yarn holding device (14, 15) is arranged, which has two clamping devices (16, 17) on a carrier (18), which carrier is rotatable about an axis (19) arranged between the clamping devices (16, 17).

8. Warping device according to claim 7, characterized in that the position of the fractional thread holding device (14, 15) is settable in the thread path in a direction perpendicular to the thread travel direction.

9. Warping device according to one of claims 2 to 8, characterized in that the partial strand knotting apparatus (12, 13) has a yarn gripper (36) which is rotatable about a sleeve (37) and acts on an end section (41) of the partial strand (5, 10) to be knotted, wherein the sleeve (37) has a longitudinal slot (38) and a suction pipe (40) is arranged in the sleeve (37), which suction pipe generates a negative pressure in the region of the longitudinal slot (38) and which suction pipe is movable.

10. Warping device according to one of claims 1 to 9, characterized in that the warping drum is connected to a control device which likewise controls the sectional warping device (1), wherein the control device causes the warping drum to stop at different angular positions during different sectional strand insertion processes.

11. A method for generating partial warps in yarn sheets (2, 3), in which a first shed (4) is formed by separating the yarn sheets (2, 3), a first partial strand (5) is inserted into the first shed (4) by a partial strand insertion device (8), a second shed (9) is formed by separating the yarn sheets (2, 3), a second partial strand (10) is inserted into the second shed (9) by the partial strand insertion device (8) and the partial strands (5, 10) are connected to one another next to the yarn sheets (2, 3), characterized in that the partial strands (5, 10) are connected to one another by a partial strand joining device (12, 13).

12. Method according to claim 11, characterized in that a split-strand knotting device is used as split-strand splicing device (12, 13).

13. Method according to claim 11 or 12, characterized in that the position of the partial strand knotting device (12, 13) is adapted to the width of the thread pieces (2, 3).

14. Method according to any of claims 11 to 13, characterized in that the yarn sheet edge is taken by a yarn sheet edge recognition device and the position of the fractional strand knotting device (12, 13) is set depending on the output signal of the yarn sheet edge recognition device.

15. Method according to any of claims 11 to 14, characterized in that the warping drum is stopped in different angular positions in order to generate a warp break.