EP0947617B2 - Procedure for making a yarn and its spinning machine - Google Patents

Description

The invention relates to a method of producing a yarn, wherein a Delivered by a drafting roving is first subjected to a compacting and then rotated by means of a ring-spinning device, and wound up as well as a spinning machine, by means of which such a method can be performed.

Compression devices in the form of provided with a perforation, rotating cylindrical rollers (DE 44 26 249 A1) or provided with a perforation, circulating, flexible straps (EP 0 635 590 A2) are known.

The compacting of a fiber ditch delivered by a drafting device has the advantage that the roving can be fed closely to the rotation zone in which it is solidified into a yarn. In this tightly packed roving, the rotation imparted to it by the rotation means jumps close to the nip line, i. the spinning triangle is very small. This has the consequence that the loss of splitting off edge fibers is minimal and that the yarn produced protrudes little. Having fibers, i. has low hairiness.

It has been shown that this advantageous effect of compaction spinning can be further increased by thread balloon-less or thread balloon-reduced spinning. Thread balloon-less or thread balloon reduced spinning has, inter alia, the effect that the yarn tension is reduced in the thread section between pair of output rollers of the drafting and spindle tip. Presumably it is this effect that effectively and beneficially supports the effect sought to compact the roving.

The method according to the invention accordingly starts from drawn, unconsolidated fiber slivers, compacts these fiber slits and rotates these compacted fiber slits thread-balloonless or yarn balloon-reduced by means of spindle attachments on spin spindles of ring spinning devices before they are wound up by means of these ring spinning devices.

A spinning machine according to the invention for carrying out this method has a drafting device, at the output of which is arranged under suction, the sliver conveying and compacting device is arranged, which has a perforation, so in the direction of movement of the roving line of small suction openings, to which the fibers of the roving zoom be sucked. The compacting device is arranged downstream of a ring spinning device, the spinning spindle is equipped with spindle mounts for thread balloon-less or Fadenballonreduzierten turning and winding of the yarn.

The compaction devices can be designed as rotating, rigid, hollow suction rolls, as suction rotors or as revolving, flexible suction straps, which are internally under induced draft. The spindle attachments can be designed as spinning fingers or as spinning crowns.

The inventive method is used in the manufacture of core yarn. Accordingly, the device according to the invention is equipped with devices for producing core yarn.

In a core yarn, the core thread should be embedded as completely as possible into the outer fibers defining the outer appearance. In normal core yarn spinning, this is done by supplying the core thread to the roving that has spread widely in the last, generally the main drafting zone, while laying the sheath fibers around the core thread by rotating the fiber structure between the pair of delivery rollers and the rotation-imparting member , so usually a ring spinning spindle. This embedding is often incomplete at some points along the yarn, which is a loss of quality of the produced Coregarnes.

The coalescing of the roving and the core filament embedded therein in the cladding fibers in addition to the compaction by the compression causes a more effective, less gapy and over the length of the yarn more uniform covering of the core thread by the sheath fibers.

The arrangement can be made so that each roving tapers a core thread or run several core filaments and it is formed by rotation of a Coregarn rotation. However, it is also possible, in particular, to allow two fiber slivers doped with at least one core yarn to converge prior to the provision of rotation, and then to produce a so-called false twist from two core yarns only by issuing a rotation.

A particularly effective embedding of the core thread is achieved if, according to the invention, it is fed as centrally as possible in front of the compression zone of the roving still lying there. This is especially true when the core thread is fed to the pair of output rollers of the drafting system on the inlet side.

In a modification of this embodiment, the core thread can also be fed directly to the compression zone. In a compacting device having a belt, the core thread may be fed to the drafting device from the side, from above or from below, on which the belt is arranged and routed around the deflection edge at the inlet side of the belt. In the other case, the strapping in the region of its inlet side is assigned a guide roller, around which the core thread is guided. When the compacting device has a suction roll, the core thread may also be supplied to the periphery of this suction roll.

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;

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

Fig. 1

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

Fig. 2

a variant of the embodiment of Figure 1 in illustration as in this figure, partly in section;

Fig. 3

a view of the compacting device of Figure 1 partially cut.

4 and 5

two further embodiments in illustration as in Figure 1, equipped for producing Coregarn.

Fig. 6

a variant of the drafting system;

Fig. 7

a further embodiments in illustration as in Fig. 1;

Fig. 8

the fragmentary plan view of the article of Fig. 7;

Fig. 9

an embodiment for producing Coregarn in front view;

The spinning machine according to the invention has a drafting 1 common design with an input roller pair 2, a middle roller pair 3 and a pair of output rollers 4. The bottom rollers 2 ', 3' and 4 'of the roller pairs are formed as steel rollers, which extend over the length of the drafting zone of the spinning machine and have ribbing on the area of work stations. The top rollers 2 ", 3" and 4 "are formed as twin top rollers, which are provided with elastic covering 5 and are mounted and spring-loaded by means of handlebars, not shown, on a support and loading arm 6 indicated in FIG. of the middle roller pair 2 are equipped with straps 7, which are each guided in not shown, also on the support and loading arm 6 and on the punch of the drafting mounted Riemchenkäfigen. This drafting system 1 delivers a fully stretched, but not yet solidified by rotation roving 8 from. It is understood that the invention can also be implemented in conjunction with drafting systems of other types.

This drafting 1 different compression devices 10 may be arranged downstream of the supplied from the drafting roving 8.

In the embodiment of FIGS. 1 to 3, the compression device 10 consists of a suction roller 11 located above the run of the fiber rove 8, ie above the drafting plane. The suction roller 11 shown in two different sectional planes in FIGS. 2 and 3 has a perforation 12 in the form a small round or transverse elongated suction openings 13 arranged in line around its circumference. It rests on two driven lower rollers 14 and 15 which, like the lower rollers of the drafting system 1, pass through the drafting area.

In order to avoid that the current from the pair of output rollers 4 of the drafting 1 to the suction roller 11 roving 8 falls about the intentional shutdown or accidental collapse of the suction roller acting on the suction or is blown about the passage of a traveling blower through the blowing stream, the lower roller 14th be wrapped by a transport belt 16, which extends by means of known guide means such as. A deflecting rail close to the nip line of the pair of output rollers 4 of the drafting system 1. By the transport belt 16, the sliver 8 is supported and supported and prevented from tearing.

As can be seen from Fig. 3, the suction roller 11 is cup-shaped and mounted by means of ball bearings 17 together with its twin roller on a salary Erten in the support and loading arm 6 axis 18. Through her open side protrudes through a shield 19, stationary suction chamber 20 into its interior. This suction chamber 20 is connected via a pipe or hose 21 with a motor 22 and a suction pump 23 comprehensive suction source 24. The suction chamber 20 limits the suction to a compression zone 25 in which it opens against the inner periphery of the suction roll 11. In this compression zone 25, the induced draft acts on the outside of the suction roll 11.

The shell of the hollow suction roll 11 may be made of steel. In order to avoid metallic contact between the suction roller 11 on the one hand and its lower rollers 14 and 15 on the other hand, elastic pads 5 must be provided. In the embodiment of Figs. 1 and 2, it is the suction roller 11 provided with the elastic pad 5, in Fig. 2 it is the bottom rollers.

Fig. 4 shows an embodiment in which the suction roll 26, which may be similar to the suction roll 11 described in connection with Fig. 1, arranged under the run of the roving 8 and designed as a driven lower roll. It is associated with it at least one top roller 27, which serves as a rotation stop for the issuing by the rotation device - here in the form of a ring spinning device - initiated rotation. At the beginning of the compression zone 25, a further top roller 28 may be arranged. The upper rollers 27, 28 are preferably formed as twin rollers and supported and loaded with the upper rollers 2 ", 3" and 4 "of the drafting system 1 in its support and loading arm 6. The suction roller 26 contains the suction chamber 20 separated by a shield 19, which supports the compaction zone 25 delimits.

In the embodiment of FIG. 5, the compression device 10 consists of a suction cup 29, which wraps around a top roller 30. This top roll 30 rests on a bottom roll 30 ', which also passes through the length of the stretch field area of the spinning machine and is driven. The suction apron 29 likewise has the already described perforation 12, which runs around its circumference in the form of small suction openings 13 arranged in line. Within the Saugriemchens 29, the suction chamber 20 is arranged here on its underside, which rests the the fiber rove 8 facing strand of Saugriemchens is open, so that the induced draft can act through the perforation 12 of the Saugriemchens on the roving.

In the embodiment of FIG. 6, a suction belt 31, which may correspond to the above-described suction belt 29 of FIG. 5, wraps around a lower roller 32. This lower roller 32 rests on a driven, further lower roller 33 which extends through the stretch field region of the spinning machine. The looped by Saugriemchen 31 lower roller 32 is associated with a top roller 34. The looped by Saugriemchen 31 lower roller 32 and its associated upper roller 34 are formed as twin rollers and held in a support and loading arm 6 and pressure loaded. The pressure-top roller 34 may have elastic coating 5 or - since it rests on the Saugriemchen 31 made of elastic plastic - also have a steel jacket. The suction apron 31 made of elastic plastic again has the perforation 12 in the form of arranged around its circumference suction openings 13 and also wraps around a connected to a suction suction chamber 20. The arrangement of a separate apron twin bottom roller 32 is selected to easily exchange the Saugriemchen 31 when worn to be able to.

According to FIGS. 7 and 8, the compacting device 10 can also have a suction rotor 35 containing the perforation 12 on its peripheral surface. The suction rotor 35 is arranged so that the plane of its perforation 12 lies approximately in a plane tangent to the rollers 4 ', 4 "of the pair of delivery rollers 4. In Fig. 8, the suction rotor 35 is cut in the plane of its perforation 12. The The inside of the suction rotor 35 again contains a suction chamber 20 connected to the suction source 24, the suction line 21 runs through the hollow axis of the suction rotor, and at the periphery of the suction rotor 35 a pressure roller 36 is resiliently pressed by means of a tension spring 37 at the end of the compression zone 25. The suction rotor 35 may be driven by means of a voltage applied to its hollow shaft tangential 38.

The lower rollers 2 ', 3' and 4 'of the drafting system 1 and the driven lower rollers 14,15; 26, 30 'and 33 of the respective compression devices 11 are driven by a in Fig. 1 by dash-dotted lines of action 39 symbolized transmission in coordinated speed ratios. In the embodiments of FIGS. 1 to 3, 5, 6 and 9 and 10 15, 30 'and 31 have the lower rollers, one of which runs from the roving 8 in the area in which its rotation is given a diameter, as he has generally found in drafting systems for the processing of the respective staple fibers as appropriate. This diameter is, for example, in cotton 27 mm to 32 mm.

The respective compacting device 10 is a common ring spinning device 40 with spinning spindle 41, spindle spindle 42, ring rail 43, spider ring 44 and ring rotor 45 downstream. According to the invention, the spinning spindle 41 is equipped with a spindle attachment in the form of a spinning finger 46 or a spinning crown 47 (FIG. 7).

In operation, the drafting unit 1 from the pair of output rollers 4 delivers a roving 8, which has a certain width due to the diameter of the incoming roving and the drafting work. This roving 8 is supported in the embodiments of FIG. 1 by the transport belt 16 to the suction unit 11, 26, 29, 31 and 35, respectively. In the compression zone 25, the roving 8 is subject to the induced draft through the perforation 12 of these suction units. Due to the induced draft, the fibers lying laterally in the roving 8 are sucked to the narrow line of the perforation 12 and the roving is thereby compacted. In this compressed state, it is delivered to the ring spinning device 40 and solidified and twisted by it by rotation. In this case, the spindle attachment spinning fingers 46 and spinning crown 47 in cooperation with the yarn guide 48, the running of the compacting device 10 thread 49, it wraps around the sleeve 50 and directs him without thread balloon or with only a very small, reduced thread balloon the ring rotor 45.

The device according to the invention is connected to a coregear device 51 for producing coregarn. Coregarn is understood to mean a yarn in which a core thread, which preferably consists of an endless, synthetic thread, is present is covered by sheath fibers of finite length, usually cotton and / or wool fibers.

As can be seen from Figures 4, 5 and 9, the drafting 1 are assigned for this purpose two Abrollwalzen 52 on which a core thread 53 containing core thread bobbin 54 rests. Of one of the rolling rollers 52, the core thread 53 is guided in the embodiment of FIG. 5 on the inlet side of the upper roller 4 ° of the output roller pair 4 of the drafting system. The rolling rollers 52 are driven at a peripheral speed corresponding to the peripheral speed of the pair of output rollers 4 in order to allow the core thread 53 of the roving 8 to run at its withdrawal speed from the main drafting zone between the roller pairs 3 and 4 at a corresponding speed.

FIG. 4 illustrates the possibility of feeding the core thread 53 directly to the compression zone 25. Here, it is fed to the inlet side of a roller pair formed by the suction roller 26 and the upper roller 28 assigned to it. The view of a coregear device 51 of FIG. 9 relates to the embodiment of the compression device according to FIG. 2.

The ability of suction units 11, 26, 29, 31 and 35 containing the perforation 12 to suck the roving B or its fibers laterally is limited. The roving 8 is therefore not or only slightly varied. So that the core thread 53 of the rove B always tapers in the middle, a core thread guide 55 must be provided which on the one hand neutralizes the traversing movement of the core thread in the course of the core thread bobbin 54 and, on the other hand, the core thread to the fiber ditch 8, i. centered to roving inlet funnel 56 of the drafting 1. This position must be adjusted and maintained at a traversing the roving B. This can be done in that roving inlet funnel 56 and core thread yarn guide 55 are mechanically coupled, which is indicated in Fig. 5 by a dot-dash line of action 57. 7 and 8 can also summarize wide iridescent fiber rove 8 summarized, so that in his use both the roving by means of the common roving inlet funnel 56 at the inlet of the drafting 1 and the core yarn guide 55 synchronously with the roving Inlet hopper 56 can vary widely.

The Kemfaden 53 accordingly runs into the at the beginning of the compression zone 25 still wide-running roving 8 and is there dense and opaque encased by the under the action of the induced suction belt close together sheath fibers of the roving and the core yarn 58th

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

Carrying and loading arm

7

Strappy

8th

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 belt (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

Claims (2)

1. Method for the production of a core yarn, in which a core thread is supplied by a condenser, by means of which a fibre sliver delivered from a drawframe is first subjected to condensing by means of a suction draught 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 means (51) for the production of core yarn (58), 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 with at least one core thread 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.

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