EP1004694B1 - Method and device for rewinding of yarn packages - Google Patents

Abstract

To rewind a yarn package, formed at a pot spinner where the spun yarn is laid by centrifugal forces at the inner wall of the spinning pot (4), the winding sleeve (10) has one end to catch the yarn with a surplus length (15) between that end of the sleeve (10) and the drawing unit (1). The surplus yarn length (15) is severed, and removed by suction. The surplus yarn length is severed by cutting, when the spun yarn is held at one end by the rollers of the drawing unit (1) and the other end is held at the yarn body or the sleeve (10) under tension. The cutter is controlled through the relative movement between the sleeve and the yarn guide tube (6), where a rotation axis lies on the theoretical center line on the common longitudinal axes of the sleeve (10) and yarn guide tube (6). The suction, to remove the cut yarn, uses the suction unit to remove lint and debris from the yarn. The cut yarn (15) also be extracted by the suction system (28) at the mobile doffer (26), which also carries the cutter (27). An Independent claim is included for an appts. with at least one cutter to sever the surplus yarn length (15) from the wound yarn body (9), together with a suction system (28) to extract the severed yarn (15). Preferred Features: Each spinning station can have a cutter and suction unit to sever the surplus yarn length (15) for extraction, using the suction unit to extract the lint and debris and/or the suction unit (28) at the mobile doffer (26). The cutter has at least one moving blade, moving in the axial direction of the sleeve (10), or rotating round the axis of a center line formed by the common longitudinal axes of the sleeve (10) and the yarn guide tube (6). The blade has a crown shape. The rotary movement is through a groove at least in a partial spiral, to carry a bolt at the cutting blade. Or the cutter is carried by the mobile doffer (26), which is also fitted with a suction unit (28) to extract the cut yarn waste (15).

Description

Method and device for wrapping a spun the package

The invention relates to a method for wrapping a Spun package according to the preamble of claim 1 and an apparatus for performing the method.

Pot spinning is usually carried out in the spinning centrifuge or the thread in the spin pot as a spin cake Completion of the actual spinning process on a previous one inserted sleeve wrapped so that a spinning cop is created. To do this, an empty sleeve is used, which during the actual Spinning process held ready on the thread guide tube and to Initiate the wrapping process on the Spinning centrifuge inner wall of deposited package over the Muzzle of the thread guide tube is lowered.

The edge of the sleeve detects that from the thread guide tube emerging rotating yarn legs, for example in an am lower end of the sleeve arranged slot, and prevents it by further rotation with the result that the at the The inner wall of the spinning centrifuge is deposited and continues with it rotating twine wraps around the core and thus on the empty tube is rewound.

The thread loosens due to the lack of further rotation from the drafting system if the drafting system continues to have material delivers, or, as is known from DE 43 24 039 A1, by a clamping and cutting device directly in the thread running direction cut off behind the drafting system. The remains on the sleeve However, thread attached, forms a drag thread or With the free end, e.g. one can be half a meter long, at the spinning station or at the further handling of the sleeve or the spinning cop disruptive Act.

The object of the invention is to identify sources of interference on a Eliminate pot spinning machine.

This object is achieved by a method with the Features of claim 1 or by a Device with the features of claim 8 solved.

Advantageous embodiments of the method are the subject of Subclaims 2 to 7. The features of subclaims 9 to 15 represent preferred developments of the device.

By cutting off near the point where the thread from the Sleeve foot has been detected is the free one remaining on the sleeve foot End of the filament so short that of it and from that through Aspirate completely removed separated Spider thread section no impairment or disturbance of the Functions of the pot spinning machine can run out more.

Because the separation is preferably carried out as a shear process, targeted, clean and safe separation is possible. The Thread does not break accidentally e.g. at a thin point under Leaving a still disturbing thread remnant or free End. The separation is preferably carried out when the thread is on one end of the drafting rollers and at the other end of Spool or the sleeve is held and tensioned, as in the Period between the start of the wrapping process and the Detachment of the thread from the drafting system is the case. The severing is therefore possible without additional clamping devices. The Thread is at both ends at the time of the shearing process sufficiently fixed and tense.

By advantageously by means of the relative movement between Sleeve and formed as part of a thread guide Thread guide tube controllable cutting device is ensured that the separation of the spun thread residue at Start of wrapping, i.e. when the remnant of spun thread arises, done automatically. An additional control can be omitted. Applying the remainder of the filament to the spinning centrifuge is excluded by cutting at the start of wrapping.

The separation is preferably carried out by the Rotational movement of a separating device, its axis of rotation on the common longitudinal axis of the sleeve and thread guide tube imaginary center line. This allows one Particularly reliable and targeted separation directly on the Slot of the sleeve. The preferably suction through the Match extraction takes place by using the at the spinning position existing suction a simple and effective Suction possibility.

In a further advantageous application of the method the remainder of the spider thread after the arrival of a traveling suitcase at the Spinning station using one carried by the hiking suitcase Separator disconnected, and removing the The remaining thread is removed by suction of the traveling doffer. This is the separation and suction of the remaining filament as a function of the hiking doffing with little effort feasible.

In a preferred embodiment, each spinning station has one Separating device for separating the remainder of the filament from Package and a suction device for removing the sun separated filament residue. So it is possible at Start of wrapping and thus when the remnant of spun thread arises to remove it immediately.

To avoid additional suction devices and the Keeping construction costs low at the spinning station is the Match extraction of the pot spinning machine also preferred as Suction device designed for the remainder of the spun thread.

In further embodiments, the separating device preferably at least one in the axial direction of the sleeve movable knife and preferably at least one by one Rotation axis rotatable knife, the rotation axis on which is the common longitudinal axis of the sleeve and thread guide tube imaginary center line. The knife is advantageously crown-shaped. With such Formations of the separation device according to the invention can be the remaining spider thread is particularly safe and targeted without Disconnect adverse evasion during the separation process. easy and space-saving structural solutions such as the arrangement of the Separator inside the sleeve, the other functions of the Pot spinning machine does not interfere with or hinder it possible.

In a particularly advantageous manner, the device for Pot spiders Means for converting the axial relative movement of Thread guide tube and sleeve in the knife movement, the Means in particular from an at least partially helical running groove and a movable bolt in the groove consist. With this version there is no need for an additional one Drive or an additional drive device.

In a further advantageous embodiment, at least one Separating device for separating the remainder of the filament on one Wanderdoffer arranged, and the Dofferabsaugung is also as Suction device designed for the remainder of the spun thread. Through the Arrangement of the separator on the hiking suitcase can Separating devices at each individual spinning station are eliminated, and the then much smaller number of separators on a pot spinning machine significantly reduces the effort.

Further details of the invention are given below the embodiments shown in the drawings.

Fig. 1

die schematische Darstellung einer Spinnstelle einer Topfspinnmaschine, teilweise im Schnitt,

Fig. 2

die vereinfachte Schnittdarstellung einer Hülse mit umgewickeltem Garnkörper,

Fig. 3

ein Fadenführerrohr in einer Führung in Spinnposition mit Halterung, Hülse und Trenneinrichtung, teilweise im Schnitt,

Fig. 4

eine vergrößerte Darstellung der Einzelheit X aus Fig. 3,

Fig. 5

eine Darstellung des unteren Teiles der Hülse entsprechend Fig. 4, jedoch in Umwickelposition,

Fig. 6

eine Schnittdarstellung von Führung und Fadenführerrohr in der Umwickelposition der Fig. 5,

Fig. 7

eine schematische Darstellung einer Spinnstelle einer Topfspinnmaschine und einem mit Trenneinrichtung und Absaugeinrichtung ausgerüsteten Doffer.

Show it:

Fig. 1

the schematic representation of a spinning position of a pot spinning machine, partly in section,

Fig. 2

the simplified sectional view of a sleeve with a wound package,

Fig. 3

a thread guide tube in a guide in the spinning position with holder, sleeve and separating device, partly in section,

Fig. 4

3 shows an enlarged illustration of the detail X from FIG. 3,

Fig. 5

a representation of the lower part of the sleeve corresponding to FIG. 4, but in the wrapping position,

Fig. 6

5 shows a sectional illustration of the guide and thread guide tube in the winding position of FIG. 5,

Fig. 7

a schematic representation of a spinning station of a pot spinning machine and a doffer equipped with a separating device and suction device.

The spinning station of a pot spinning machine shown in Fig. 1 lies in the fiber flow direction below one through the last Delivery roller pair indicated drafting system 1. The in Drafting device 1 warped sliver 2 is in the spinning triangle 3 under the effect of the rotating spinning centrifuge 4 into a thread 5 twisted together and by as part of a thread guide formed thread guide tube 6 into the spinning centrifuge 4 introduced. From the mouth 7 of the thread guide tube 6 emerging thread 5 lies under the action of the rotation the spinning centrifuge 4 to the inner wall 8 of the spinning centrifuge 4 and forms a package 9 there. The thread guide tube 6 leads one in the axial direction through the double arrow indicated oscillation movement with which the formation of the Package 9 is controlled. The position that the Thread guide tube 6 in Fig. 1 and during the traversing movement occupies is called the spinning position. During the The spinning process is via the thread guide tube 6 pushed sleeve 10 above the mouth 7 of Thread guide tube 6.

To initiate the wrapping process, the sleeve 10 is on the Mouth 7 of the thread guide tube 6 into the dashed drawn rewind position 11 lowered. The circulating Yarn leg 12 is a slot 13 at the foot of the sleeve 10th detected and fixed so that the package 9 automatically on the Sleeve 10 wrapped with spinning centrifuge 4 rotating further becomes. The wound sleeve 10 can then on a held ready below the spinning centrifuge 4 Transport plate 14 applied and together with the Transport plate 14 are removed for further processing.

It forms a wound with a package 30 Sleeve 10. Such a wound sleeve 10 shows the illustration of FIG. 2. By fixing the thread 5 in the slot 13 the thread 5 no longer gives rotation and the thread 5 thereby separated from the sliver 2 below the drafting device 1. Also a Cut off directly with a clamping and cutting device below the drafting device 1, as from DE 43 24 093 A1 known, can be done. The free end of the thread 5 forms then a spider thread residue 15, which is approximately half Meters long.

The end of the filament thread 15 remains on the sleeve 10 fixed and can with the other loose end at the spinning position, in the event of removal or further processing for faults to lead.

Fig. 3 shows a part of the thread guide tube 6, the the lower end protrudes into the spinning centrifuge 4. The Thread guide tube 6 is in a guide 17 in the axial direction kept slidable. The sleeve 10 is during the Spinning process by means of a bracket 16 detachable connection fixed in position. The tour 17 is arranged inside the sleeve 10 and in the holder 16 about the center line 18 coinciding with the longitudinal axis rotatably mounted. The guide 17 is in the axial direction not displaceable relative to the holder 16.

The mouth 7 of the thread guide tube 6 extends beyond the end of the Sleeve 10 addition, and the twine leg 12 can be freely rotate. Guide sleeve 10, sleeve holder 16 and guide 17 together with the thread guide tube 6, the changing up and down Downward movement during the spinning process without changing the position these parts changed to each other.

In the lower part of the sleeve 10 is fixed to the guide 17th connected knife 19 arranged. The knife 19 is in one in turn, its counterpart 20 firmly connected to the sleeve guided. The knife 19 is crown-shaped at its lower end trained and can with the prongs 21 of the crown-shaped part in the counterpart 20 a rotational movement around the Execute center axis 18. The detail X of FIG. 3 is in 4 is shown enlarged.

The thread guide tube 6 has one in the lower part parallel to the center line 18 extending groove 22 on the lower end of the thread guide tube 6 is too helical is trained. A firmly connected to the guide 17 Bolt 23 engages in the groove 22 and is in this displaceable.

The wrapping process is initiated in that the sleeve 10th lowered over the mouth 7 of the thread guide tube 6 becomes. If the lower edge of the sleeve 10 the circumferential Twine legs 12 reached, this is captured by the slot 13 and fixed. The wrapping process starts automatically through the further rotating spinning centrifuge 4.

The rewinding position 11 of the sleeve 10 is shown in FIG. 5. The sleeve 10 has its position in relation to the thread guide tube 6 together with the bracket 16 and the guide 17 together with the attached to the guide 17 knife 19 and the Sleeve 10 attached counterpart 20 in the axial direction changed. The bolt 23 also has its position around the Corresponding way down changed. Thread guide tube 6 and sleeve 10 are held so that both do not perform a rotational movement about the center line 18.

Further details in this position are from the 6 shows a sectional view. In the further Movement of the sleeve 10 downward reaches the bolt 23 helical part of the groove 22 and causes a Rotational movement of the guide 17 and thus the knife 19 around the central axis 18. The thread 5 which is between the drafting device 1 and the package 30 is held on the sleeve 10 and between two teeth 21 of the knife 19 and through a notch 24 of the counterpart 20 is due to the shear action of Knife 19 and counterpart 18 separated. The remaining thread 15 is acting as a suction device 25 Matched suction suction.

Doffing can also be done in a random order done by a hiking suitcase 26. The principle representation 7 shows a hiking suitcase 26, the one Cutting device 27, a suction device 28 and a Gripping device 29 for pulling the wound sleeve 10 and for attaching a sleeve 10 held ready as an empty sleeve having. After the Wanderdoffer 26 reaches the spinning station has, the gripping device 29 grips the foot of the wound Sleeve 10, the suction device 28 sucks the spun thread residue 15, which is now detached from the sliver 2 at the spinning triangle 3 has, and the cutting device 27 separates the Spider thread residue 15 directly at the foot of the wound sleeve 10.

The subject of the invention is not based on that in the figures illustrated embodiments limited. Further Embodiments e.g. mounting and guidance are possible.

The knife 19 can also be in direct cooperation with the Slit 13 of the sleeve 10 shear off the remaining filament 15, wherein the slot 13 acts as a notch 24 of the counterpart 20.

Details of the drive and the not described here Holder for thread guide tube, sleeve, sleeve holder and Leadership can be according to the state of the art, as it is Example from DE 195 20 153 A1 or DE 43 24 039 A1 emerges, be executed.

Claims (15)

1. Method for winding the spun yarn package (9) deposited on the inner wall of the spinning centrifuge (4) of a pot spinning machine onto a tube (10), the tube (10) being inserted into the spinning centrifuge (4) for this purpose and the yarn (5) extending between the opening (7) and the inner wall (8) of the spinning centrifuge (4) being captured at the end of the tube (10) which reaches the opening (7) of a yarn guide tube (6) first, characterised in that at the end of the tube (10 where the yarn (5) is captured, the filament remnant (15) produced between a drafting device (1) and this tube end is separated from the yarn package (9) and the tube (10) and then suction filtered.
2. Method according to claim 1, characterised in that separation proceeds as a shearing process.
3. Method according to either of claims 1 or 2, characterised in that separation takes place when the yarn (5) is held or tensioned at one end by the rollers of the drafting device (1) and at the other end by the yarn package (9) or the tube (10).
4. Method according to any of claims 1 to 3, characterised in that a separating device which can be controlled by relative movement between the tube (10) and the yarn guide tube (6) brings about separation.
5. Method according to any of claims 1 to 4, characterised in that separation takes place owing to the rotary movement of a separating device, the axis of rotation of which is located on the imagined centre line (18) forming the common longitudinal axis of the tube (10) and the yarn guide tube (6).
6. Method according to any of claims 1 to 5, characterised in that suction filtering takes place owing to the slubbing suction filtering of the spinning position formed as a suction filtering device (25).
7. Method according to either of claims 1 or 2, characterised in that after the arrival of a travelling doffer (26) at the spinning position of the filament remnant (15), separation takes place by means of a separating device (27) entrained by the travelling doffer (26) and in that the filament remnant (15) is removed by the suction filtering device (28) of the travelling doffer (26).
8. Device for carrying out the method according to claim 1, characterised in that there is at least one a separating device for separating the filament remnant (15) from the yarn package (9) and a suction filtering device (25; 28) for removing the thus separated filament remnant (15).
9. Device according to claim 8, characterised in that each spinning positions comprises a separating device for separating the filament remnant (15) from the yarn package (9) and a suction filtering device (25) for removing the thus separated filament remnant (15).
10. Device according to either of claims 8 or 9, characterised in that slubbing suction filtering of the pot spinning machine is also formed as a suction filtering device (25) for the filament remnant (15).
11. Device according to any of claims 8 to 10, characterised in that the separating device comprises at least one knife (19) movable axially relative to the tube (10).
12. Device according to any of claims 9 to 11, characterised in that the separating device comprises at least one knife (19) rotatable about an axis of rotation, the axis of rotation being located on the imagined centre line (18) forming the common longitudinal axis of the tube (10) and the yarn guide tube (6).
13. Device according to claim 11 or 12, characterised in that the knife (19) has a crown-like shape.
14. Device according to either of claims 12 or 13, characterised in that the device for pot spinning comprises means for converting the axial relative movement of the yarn guide tube (6) and the tube (10) into movement of the knife, the means consisting, in particular, of an at least partially spiral groove (22) and a bolt (23) movable in the groove (22).
15. Device according to claim 8, characterised in that at least one separating device for separating the filament remnant (15) is arranged on a travelling doffer (26) and the suction filtering device of the travelling doffer is also constructed as a suction filtering device (28) for the filament remnant (15).

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