EP0947617B1 - Procedure for making a yarn and its spinning machine - Google Patents

Description

The invention relates to a method for producing a yarn, in which a fiber sliver delivered by a drafting system first subjected to compression and then by means of a ring spinning device is rotated and wound as well a spinning machine by means of which such a method is carried out can be.

Compaction devices in the form of with a perforation track provided, rotating, cylindrical rollers (DE 44 26 249 A1) or of circumferential, perforated Flexible straps (EP 0 635 590 A2) are known.

The compression of a fiber sliver delivered by a drafting system offers the advantage that the fiber sliver is summarized closely can be fed to the twist zone in which it becomes a yarn is solidified. Jumps into this tightly summarized fiber sliver the rotation given to it by the rotation device to close to the clamping line, i.e. the spinning triangle is very small. This has the consequence that the loss of splitting edge fibers is minimal and that the yarn produced has little protruding fibers has, i.e. has little hairiness.

It has been shown that this advantageous effect of compression spinning through threadless balloons or reduced thread balloons Spinning can be further increased. Yarn balloon lot or thread balloon reduced spinning has the effect, among other things, that the thread tension in the thread piece between the pair of output rollers the drafting systems and spindle tip are reduced. Presumably it is this effect that the one with the compression of the The fiber fiber effect is effective and advantageous supported.

The method according to the invention is accordingly based on stretched unconsolidated fiber sliver, compresses this fiber sliver and turns these compressed fiber lunches without a thread balloon or thread balloon reduced by means of spindle attachments on spinning spindles of ring spinning devices before using these ring spinning devices be wound up.

A spinning machine according to the invention for performing this method has a drafting system, at the exit of which a below Suction-suction device that conveys and compresses the sliver is arranged, which is a perforation track, i.e. one in Direction of the movement of the fiber sliver running row smaller Has suction openings to which the fibers of the fiber sliver are sucked become. The compression device is a ring spinning device downstream, whose spinning spindle with spindle attachments for thread balloonless or thread balloon reduced turning and winding of the yarn.

The compaction devices can be rotating, rigid, hollow suction rolls, as suction rotors or as rotating, flexible Suction straps should be formed inside with suction stand. The spindle attachments can be used as spinning fingers or as Spinning crowns are formed.

In addition to the production of simple yarn is also advantageous when manufacturing core yarn or / and from false twine. Accordingly can the device according to the invention also with devices for manufacturing by coregarn and / or false twine.

In a core yarn, the core thread should be as complete as possible the outer fibers that determine the external appearance are embedded become. In normal core yarn spinning, this is done by that the core thread of the last, usually in the Main area of warp fed wide spread fiber sliver while the sheath fibers are wrapped around the core thread by rotating the fiber structure between the pair of output rollers and the organ giving the rotation, as a rule that is, a ring spinning spindle. This embedding takes place on some places along the yarn often incomplete what represents a loss in quality of the core yarn produced.

The joint compression of the fiber sliver and the embedded in it Core thread in the sheath fibers in addition to screwing by compacting does a more effective, less Gaps and more uniform over the length of the yarn Covering the core thread with the sheath fibers.

The arrangement can be such that each fiber sliver is one Core thread comes in or several core threads come in and a core yarn is formed from it by twisting. It is however also possible, in particular two with at least one Core yarn doped fiber lunches run together before giving rotation and then only by giving rotation to produce a so-called false thread from two core yarns.

A false thread is a textile thread, at to which two untwisted fibers are given rotation together. Here, the two fibers are wrapped around each other and given the fiber structure thus formed rotation. Real thread this false twist differs in that the two Components do not have their own rotation, but only by the looping around by turning them together in the end product are kept similarly separate from one another real thread is the case.

A false thread appears the more similar to a real thread, ever the two components remain more clearly recognizable in the false twine. By compacting, the fibers that make up each of the consists of two fiber lunches, combined into a compact fiber structure, which when merging is far less condensed with the respective other fiber structure. The the two fiber associations therefore remain more clearly separated and the false thread appears more like a real thread.

A particularly effective embedding of the core thread is then achieved if this according to the invention before the compression zone fiber sliver still lying there is fed as centrally as possible becomes. This is particularly the case if the core thread is the Output roller pair of the drafting system fed on its inlet side becomes.

In a modification of this embodiment, the core thread can also be direct be fed to the compression zone. One strappy having compression device, the core thread Drafting system fed from that side - from above or from below on which the strappy is arranged and around the Deflection edge on the inlet side of the apron. In the other case, the apron is in the area of its inlet side assigned a guide roller around which the core thread is guided. If the compaction device has a suction roller, can the core thread can also be fed to the circumference of this suction roller.

Fig. 1

eine erste Ausführungsform der Erfindung im Querschnitt durch den Streckwerksbereich und durch die Spindelreihe;

Fig. 2

eine Variante der Ausführungsform der Fig.1 in Darstellung wie in dieser Figur, teils geschnitten;

Fig. 3

eine Ansicht der Verdichtungsvorrichtung der Fig. 1 teilweise geschnitten;

Fig. 4 und 5

zwei weitere Ausführungsformen in Darstellung wie in Fig. 1, ausgestattet zum Herstellen von Coregarn;

Fig. 6

eine Variante des Streckwerks;

Fig. 7

eine weitere Ausführungsformen in Darstellung wie in Fig. 1;

Fig. 8

die ausschnittsweise Draufsicht auf den Gegenstand der Fig. 7;

Fig. 9

eine Ausführungsvariante zum Herstellen von Coregarn in Ansicht von vorn;

Fig. 10

eine Ausführungsvariante zum Herstellen von Scheinzwirn in Ansicht von vorn.

Exemplary embodiments of the invention are shown schematically in the figures of the drawing.
Show it

Fig. 1

a first embodiment of the invention in cross section through the drafting system area and through the spindle row;

Fig. 2

a variant of the embodiment of Figure 1 in representation as in this figure, partially cut;

Fig. 3

a view of the compression device of Figure 1 partly in section;

4 and 5

two further embodiments shown as in FIG. 1, equipped for producing core yarn;

Fig. 6

a variant of the drafting system;

Fig. 7

a further embodiments in representation as in Fig. 1;

Fig. 8

the partial plan view of the subject of Fig. 7;

Fig. 9

a variant of the manufacture of core yarn in front view;

Fig. 10

a variant of the manufacture of false twine in front view.

The spinning machine according to the invention has a drafting system 1 which is more common Design with an input roller pair 2, a middle roller pair 3 and a pair of output rollers 4. The lower rollers 2 ', 3 'and 4' of these pairs of rollers are designed as steel rollers, which extend over the length of the drafting system area of the spinning machine extend and point in the area of work Corrugation on. The top rollers 2 ", 3" and 4 "are as twin top rollers trained who provided with elastic covering 5 and by means of a handlebar, not shown, on one indicated in FIG Carrying and loading arm 6 are mounted and spring-loaded. The rollers 2 'and 2 "of the middle roller pair 2 are with straps 7 equipped, each in not shown, also on Support and load arm 6 or on the punch of the drafting system stored strappy cages are guided. This drafting system 1 delivers a fully stretched but not yet twisted solidified fiber sliver 8. It is understood that the invention also realized in conjunction with other types of drafting systems can be.

This drafting system 1 can have different compaction devices 10 for the fiber sliver 8 delivered by the drafting system his.

In the embodiment of FIGS. 1 to 3 there is the compression device 10 from an over the run of the fiber sliver 8, So above the drafting machine level lying suction roll 11. Die 2 and 3 shown in two different sectional planes Suction roll 11 has a perforation 12 in the form of a Small round or transverse line arranged around its circumference elongated suction openings 13. It lies on two driven lower rollers 14 and 15, which like the lower rollers of drafting device 1 pass through the drafting device area.

To avoid that of the pair of output rollers 4 of the drafting system 1 fiber sliver 8 running to the suction roll 11, for example when desired Switch off or in the event of an unwanted collapse of the suction train acting on the suction roll falls down or about blown by a blowing blower as it passes the lower roller 14 can from a conveyor belt 16 can be entwined, using known guide means such as a deflection rail close to the clamping line of the Output roller pair 4 of the drafting device 1 extends. By the Conveyor strap 16, the sliver 8 is worn and supported and prevented from tearing off.

As can be seen from Fig. 3, the suction roller 11 is cup-shaped and by means of ball bearings 17 together with their twin roller an axle 18 mounted in the support and load arm 6. One protrudes through a shield 19 through its open side separated, fixed suction chamber 20 inside. This suction chamber 20 is connected via a pipe or hose 21 a suction source 24 including a motor 22 and a suction pump 23 connected. The suction chamber 20 limits the suction effect to one Compression zone 25 in which they are against the inner circumference the suction roller 11 opens. The acts in this compression zone 25 Suction on the outside of the suction roller 11.

The jacket of the hollow suction roll 11 can be made of steel. Around metallic contact between the suction roller 11 on the one hand and to avoid their lower rollers 14 and 15 on the other hand elastic coverings 5 may be provided. In the embodiment of the 1 and 2, it is the suction roll 11, which with the elastic Cover 5 is provided, in Fig. 2 it is the lower rollers 14 and 15th

Fig. 4 shows an embodiment in which the suction roller 26, the similar to the suction roller 11 described in connection with FIG. 1 can be arranged under the run of the sliver 8 and is designed as a driven lower roller. At least it is you an upper roller 27 assigned, which as a rotation stop for the device issuing the rotation - here in form a ring spinning device - initiated rotation. At the beginning A further top roller 28 can be arranged in the compression zone 25 his. The top rollers 27, 28 are preferably twin rollers trained and with the top rollers 2 ", 3" and 4 "of Drafting unit 1 held in its support and loading arm 6 and loaded. The suction roller 26 contains the by a shield 19th separate suction chamber 20 which delimits the compression zone 25.

5 is the compression device 10 from a suction strap 29, the one Top roller 30 wraps around. This top roller 30 lies on one Bottom roller 30 ', which also extends over the length of the stretching area the spinning machine runs and is driven. The Suction straps 29 also have the center described above Perforation 12 extending around its circumference in the form of a line small suction openings 13. Within the Suction straps 29, the suction chamber 20 is arranged here its underside, which the strand of fiber facing 8 Suction strap is open, so that the suction through the Perforation 12 of the suction strap onto the fiber sliver can act.

In the embodiment of FIG. 6, a suction strap wraps around 31, the suction strap 29 of FIG. 5 described above can correspond to a lower roller 32. This lower roller 32 is located on a continuous over the stretching field area of the spinning machine, driven, further lower roller 33. The from Suction strap 31 wrapped around the lower roller 32 is an upper roller 34 assigned. The lower roller wrapped by the suction strap 31 32 and the top roller 34 assigned to it are as twin rollers trained and held in a support and load arm 6 and pressure-loaded. The top pressure roller 34 can be elastic covering 5 have or - since they on the suction strap 31 made of elastic Plastic rests - also have a steel jacket. The Suction strap 31 made of elastic plastic again has the perforation 12 in the form of suction openings arranged around its circumference 13 and also wraps around a connected to a suction source Suction chamber 20. The arrangement of a separate strappy twin bottom roller 32 is selected to the suction strap 31st easier to replace when worn.

The compression device 10 can also according to FIGS. 7 and 8 a perforation 12 containing on its peripheral surface Have suction rotor 35. The suction rotor 35 is arranged so that the level of its perforation 12 approximately in one of the rollers 4 ', 4 "of the output roller pair 4 tangential in their nip line Level lies. 8, the suction rotor 35 is in the plane of its perforation 12 cut. Contains the inside of the suction rotor 35 again a suction chamber 20 connected to the suction source 24, the suction line 21 runs through the hollow axis of the suction rotor. At the periphery of the suction rotor 35 is at the end of the compression zone 25 a pressure roller 36 by means of a tension spring 37 pressed resiliently. The suction rotor 35 can by means of a its hollow shaft adjacent tangential belt 38 driven his.

The lower rollers 2 ', 3' and 4 'of the drafting unit 1 and the driven ones Bottom rolls 14, 15; 26, 30 'and 33 of the respective compression devices 11 are by a dash-dotted in Fig. 1 Lines of action 39 symbolized gear in one another coordinated speed ratios driven. In the Embodiments of FIGS. 1 to 3, 5, 6 and 9 and 10 have the lower rollers 15, 30 'and 31, from which the fiber sliver 8 in the area where she is given rotation, one Diameter on how it is generally used in drafting systems for the Processing of the respective staple fibers has proven to be expedient Has. For cotton, for example, this diameter is 27 mm to 32 mm.

The respective compression device 10 is a common one Ring spinning device 40 with spinning spindle 41, spindle bench 42, Ring bank 43, spinning ring 44 and ring traveler 45 arranged downstream. According to the invention is the spinning spindle 41 with a spindle attachment in Shape of a spinning finger 46 or a spinning crown 47 (FIG. 7) fitted.

In operation, the drafting system 1 delivers from the output roller pair 4 a fiber sliver 8, which due to the diameter of the incoming Roving and the warping has a certain width. This fiber sliver 8 is used in the embodiments of FIG. 1 supports the suction unit by means of the transport strap 16 11, 26, 29, 31 and 35 respectively. In the compression zone 25 the fiber sliver 8 is subject to suction through the perforation 12 of these suction units. Through the suction, they are in the fiber sliver 8 lateral fibers on the narrow line of the perforation 12 sucked in and the fiber sliver thereby compressed. In this compacted state, it is sent to the ring spinning device 40 delivered and solidified by this by granting rotation and wound up. The spindle attachment catches spinning fingers 46 or spinning crown 47 in cooperation with the thread guide 48 den thread 49 coming in from the compression device 10, wraps it around the sleeve 50 and guides it without a thread balloon or with only a very small, reduced thread balloon to the ring traveler 45 to.

The device according to the invention can also be equipped with a core yarn device 51 can be connected to produce core yarn. Core yarn is a yarn in which one is preferred core thread consisting of an endless, synthetic thread due to sheath fibers of finite length, usually cotton or / and wool fibers, is covered.

As can be seen from Figures 4, 5 and 9, the drafting system 1 assigned to this purpose two rolling rollers 52 on which a core thread spool 54 containing a core thread 53 rests. One of the unwinding rollers 52 in the embodiment is the 5 the core thread 53 on the inlet side of the top roller 4 " of the output roller pair 4 of the drafting system. The unrolling rollers 52 are at a peripheral speed of the pair of output rollers 4 driven peripheral speed, around the core thread 53 of the fiber sliver 8 with its withdrawal speed from the main draft zone between the pairs of rollers 3 and 4 to run at the appropriate speed.

In Fig. 4 the possibility is shown, the core thread 53 directly to supply the compression zone 25. It is the entry side here one by the suction roller 26 and those assigned to it Upper roller 28 formed pair of rollers fed. The view a core yarn device 51 of FIG. 9 relates to the Embodiment of the compression device according to FIG. 2.

The ability of the suction units containing the perforation 12 11, 26, 29, 31 and 35, the fiber sliver 8 or its fibers laterally suction is limited. The fiber sliver 8 is therefore not or only changes to a small extent. So that the core thread 53 the fiber sliver 8 always runs in the center, a core thread guide 55 may be provided, on the one hand the traversing movement of the core thread neutralized during the run from the core thread spool 54 and on the other hand the core thread for fiber sliver 8, i.e. to the Roving inlet funnel 56 of the drafting device 1 centered. This Position must be adjusted and when the fiber sliver shifts 8 be maintained. This can be done by using roving inlet funnels 56 and core thread guide 55 mechanically are coupled, which in Fig. 5 by a dash-dot Action line 57 is indicated. Only the suction rotor 35 of FIG. 7 and 8 can also summarize broadly changing fiber sliver 8 compress, so that both the fiber sliver by means of its use of the common roving inlet funnel 56 at the inlet of the Drafting unit 1 and the core thread guide 55 synchronously can change widely with the roving inlet hopper 56.

The core thread 53 accordingly runs into that at the beginning of the compression zone 25 still broad fiber sliver 8 and is there due to the cladding fibers that close together under the effect of suction the fiber sliver is encased tightly and opaque and for Core yarn 58.

Finally, in FIG. 10 - using the compression device as an example 10 of Fig. 5 - still shown the possibility that Setting up drafting device 1 for the production of false twine. in this connection the suction strap 29 has a perforation 12 in the form of two rows of suction openings 13 spaced apart from one another on. By means of this double perforation, two on the respective Work the drafting system 1 of separate roving bobbins 59 incoming and stretched in the drafting system and through the Output roller pair 4 fiber sliver 8 delivered side by side, 8 'still compressed separately. After this has condensed Fiber slivers from the lower roller 30 'of the compactor 10 the two fiber lunches 8, 8 'run at the union point 60 together and are formed by the ring spinning device 40 of a false thread 61 turned and wound up.

So that when one of the two breaks the false twine 61 Sliver 8, 8 'the remaining sliver is not a single yarn a storage device can be provided, that if one of the two components breaks, the other to Break leads. This storage device 62 consists of a trap 63 with a pair of pins 64, between which the false thread 61 runs. The trap 63 sits on a support 65 with a narrow Stability range and is around this about an axis 66 tiltable. If one of the two components of the false twist 61 breaks, the remaining component moves laterally far that the trap 63 swung out of its stability range and tilts down. The remaining one Component wrapped around the pair of pins 64 and prevented rotation propagation also led to breakage.

It is understood that the variants described and shown the components of the spinning machine according to the invention such the indispensable - drafting device 1, compression device 10, Rotation and winder 40 - and the optional - like balloonless with spinning fingers 46 or spinning crown 47, core yarn device 51 and device for producing Scheinzwirn 61 - also in other than those described and shown Combinations can be realized.

LIST OF REFERENCE NUMBERS

1

drafting system

2

Pair of input rollers

3

Central roller pair

4

Ausgangswaizenpaar

2 ', 3', 4 '

bottom rollers

2 ", 3", 4 "

top rollers

5

Elastic cover

6

Low load and load

7

Strappy

8, 8 '

roving

10

compacting device

11

suction roll

12

perforation

13

suction

14, 15

bottom rollers

16

Transportriemchen

17

ball-bearing

18

axis

19

sign

20

suction chamber

21

Pipe or hose line

22

engine

23

suction pump

24

suction source

25

compression zone

26

Suction roll (Fig. 4)

27, 28

top rollers

29

Suction straps (Fig. 5)

30

top roll

31

Suction straps (Fig. 6)

32, 33

bottom roll

34

top roll

35

suction rotor

36

pressure roller

37

mainspring

38

tangential

39

lines of action

40

Ring spinning device

41

spinning spindle

42

spindle rail

43

ring rail

44

spinning ring

45

ring rotor

46

spin finger

47

spin crown

48

thread guides

49

thread

50

shell

51

Coregarneinrichtung

52

unrolling rollers

53

core thread

54

Core bobbin

55

Core thread thread guide

56

Roving inlet funnel

57

line of action

58

core yarn

59

roving

60

rallying point

61

false twist

62

shelf device

63

Cases

64

pair of pins

65

In stock

66

axis

Claims (14)

1. Method for the production of a yarn, in which a fibre sliver delivered from a drawframe is first subjected to condensing and is subsequently twisted without a thread balloon or with a reduced thread balloon by means of a ring-spinning device and is wound up.
2. Spinning machine with drawframes (1) which deliver at least one fibre sliver (8, 8') in each case at their pairs of withdrawal rollers (4) and which are equipped at their exits with condensing devices (10) for amalgamating the at least one fibre sliver and which have a perforation (12) which is under a suction draught, and with ring-spinning devices (40), by means of which the condensed fibre slivers are consolidated by twist being imparted to them, the ring-spinning devices being equipped with means (46, 47) for spinning without a thread balloon or with a reduced thread balloon.
3. Spinning machine according to Claim 2, characterized in that the condensing devices (10) are designed as suction rollers (11, 26) having the perforation (12).
4. Spinning machine according to Claim 2, characterized in that the suction roller (11) is arranged above the run of the fibre sliver (8) and lies on at least one driven lower roller (14, 15).
5. Spinning machine according to Claim 4, characterized in that a transport apron (16) is arranged between the pair of withdrawal rollers (4) of the drawframe (1) and the suction roller (11).
6. Spinning machine according to Claim 5, characterized in that the transport apron (16) loops around a lower roller (14) assigned to the suction roller (11).
7. Spinning machine according to Claim 2, characterized in that the condensing devices (10) are designed as suction aprons (29, 31) having the perforation (12).
8. Spinning machine according to Claim 2, characterized in that the suction aprons (29) loop around an upper roller (30) lying above the drawframe plane.
9. Spinning machine according to Claim 2, characterized in that the suction aprons (31) loop around a lower roller (32) which lies below the drawframe plane and lies on a driven lower roller (33) and to which an upper roller (34) is assigned.
10. Spinning machine according to Claim 2, characterized in that the condensing devices (10) are designed as suction rotors (35) having the perforation (12).
11. Spinning machine according to Claim 2, characterized in that the means for spinning without a thread balloon or with a reduced thread balloon on the ring-spinning devices (40) are designed as spinning fingers (46).
12. Spinning machine according to Claim 2, characterized in that the means for spinning without a thread balloon or with a reduced thread balloon on the ring-spinning devices (40) are designed as spinning crowns (47).
13. Spinning machine according to Claim 2, characterized in that it has a means (51) for the production of core yarn (58).
14. Spinning machine according to Claim 2, characterized in that it is set up for the production of false twist (61).

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