EP0947616A2 - Spinning machine with a drawing frame comprising a suction rotor - Google Patents

Abstract

The axis of the suction rotor (11) is arranged so that the plane of the perforations on the rotor is tangential to the delivery rollers (4) of the drafting system in the plane of the nip. The suction rotor is fitted with a nip roller (24) at the end of the condensing zone. The thickness (H) of the rotor is kept as small as possible and the edges are chamfered (13).

Description

The invention relates to a spinning machine with drafting systems and with spindles and along the fiber path between the drafting systems and the spindles arranged on the circumference with a perforation provided, standing inside under suction, driven rotating suction rotors through which in a part of the circumference of the suction rotors limited compression zone fiber sliver be sucked in and compressed.

Such a spinning machine is known from EP 0 162 787 B1. The drafting units of this spinning machine are each one disc-shaped suction rotor downstream, over which those of the The draft lines delivered and run on them Fiber lunches are compressed. This compression takes place through Suction of the fibers forming the fiber sliver against a narrow one Trace of perforation penetrating the jacket of the suction rotor, in particular one running around the circumference of the suction rotor Line of intake openings. In the embodiment of the figures 10, 11 and 12 of this document is the axis of rotation of the Suction rotor horizontal and the level of its perforation parallel arranged to the drafting rollers of the drafting systems. On this suction rotor are two, of two lying side by side The fiber sliver delivered to the drafting units to form a core / sheath yarn united, then the wrong one with a false twist spindle Granted rotation and finally wound on a spool becomes.

Due to the position of the suction rotors, at least one of the fibers is forced, not solidified by rotation to run a certain distance. Subject in this area the fiber fuse of the risk of damage. So she can or at least their fibers, for example, by the air flow of a traveling blower to be swirled. This would at least make hairiness of the yarn produced undesirably increased or even its Uniformity can be adversely affected. Furthermore, the Ring spinning device on the fiber sliver lying on the suction rotor Pull out, which affects an optimal compression of the fiber sliver.

The object of the invention was accordingly the distance, via a fiber sliver without guidance to such a suction rotor runs to reduce and keep the thread of a downstream twisting and winding device away from the compression zone. It solves this task by the in the mark of the Main claim mentioned features.

The sliver emerges as a ribbon from the pair of exit rollers, whose width is a multiple of its thickness. As a result of that the perforation on the suction rotor in the direction of Width extension of the sliver moves and the sliver on takes up its scope, is advantageously already given a compaction effect, to which the suction effect in the Compression zone is added. The location of the plane of the perforation in which the output rollers tangent in their nip line Level also advantageously allows the sliver to be like usual to change.

If in a first implementation of the invention the suction rotor runs very narrow, the advantage is achieved that a Circumferential area of the suction rotor in the gusset between the lower roller and the top roller of the pair of output rollers are moved can, making it closer to the nip line of the exit roller pair lies. The distance between the clamping line of the Output roller pair on which the fiber sliver through the guide leaves the drafting system, and the circumference of the suction rotor on which the fiber sliver is again guided, significantly reduced.

Surprisingly, it turned out that in a second realization of the invention, in which the pulling off by jumping in the amount of twist produced of the suction rotor or the extent of a pressure roller assigned to it offset laterally to the axis of rotation of the suction rotor and oblique direction, the yarn over the peripheral surface of the suction rotor or the pressure roller. This will Yarn twist granted, which is wrong twist, but that Jump-in of the real rotation then advantageously supported, if the direction of rotation of the intended rotation and the direction of rotation of the wrong rotation on their expiring side. The direction of rotation of the wrong rotation granted can by choosing the direction of rotation of the suction rotor or the pressure roller, from which the yarn runs off, and its wrapping through the yarn to the meaning of the granted real Rotation. By supporting the jump in The real twist given to the yarn becomes thread breaks reduced and the incorporation of protruding fibers improved, which reduces the hairiness of the yarn produced.

For this it is advantageous if the suction rotor or the pressure roller, from which the yarn is running, not as narrow as is possible, but at least in the direction of rolling the yarn is elongated cylindrically. If it's the suction rotor is, which is to be extended, however, must be on the Advantage to be dispensed between the suction rotor in the gusset to be able to move the two rollers of the pair of output rollers. It but is easily possible, the pressure roller in the axial Extend direction, so in this case both the advantage tight positioning of the suction rotor on the clamping line of the Output roller pair of the drafting system as well as the advantage of Support of the rotation given by false twist is.

For a particularly effective unwinding of the yarn on the suction rotor or to reach on his pressure roller is the suction rotor or the relevant pressure roller in any case in the area in where the unrolling of the yarn takes place with a high covering Equipped with friction coefficient, for example with rubber or with a rubber-like material.

In addition to the production of simple yarn is also advantageous when manufacturing core yarn be used. Accordingly, the spinning machine can additionally also with the compression device according to the invention Equipment for the production of core yarn.

In a core yarn, the core thread should be as complete as possible the sheath fibers that determine the outer appearance of the yarn be embedded. Done in normal core yarn spinning this is because the core thread of the last, as a rule, that is, in the main warping area, the fiber sliver has spread widely apart is fed while laying the sheath fibers around the Core thread by rotating the fiber structure between the pair of output rollers and the organ giving the rotation, in all So usually a ring spinning spindle takes place. This embedding is done often incomplete in some places along the yarn, which represents a loss in quality of the core yarn produced.

Embedding the Core thread in the sheath fibers also supported for screwing creating a more effective, less gapy one and covering the length of the yarn more evenly Core thread through the sheath fibers.

Exemplary embodiments of the invention are shown in the figures of the drawing shown. The representation is largely schematic.

Fig. 1

den Querschnitt durch Streckwerk und Spindelreihe einer ersten Ausführungsform der Erfindung;

Fig. 2

die ausschnittsweise Draufsicht auf den Gegenstand der Fig. 1, teils geschnitten;

Fig. 3

eine Ausgestaltung des Gegenstandes der Fig. 1 zum Herstellen von Coregarn und zum Spinnen mit Spinnfinger;

Fig. 4

einen Längsschnitt durch den Saugrotor der Fig. 1 bis 3;

Fig. 5

eine zweite Ausführungsform der Erfindung in Darstellung wie in Fig. 1;

Fig. 6

die ausschnittsweise Draufsicht auf den Gegenstand der Fig. 5 in Darstellung wie in Fig. 2, teilweise geschnitten.

Show it

Fig. 1

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

Fig. 2

the partial plan view of the object of Figure 1, partially cut.

Fig. 3

an embodiment of the object of Figure 1 for the manufacture of core yarn and for spinning with spinning fingers.

Fig. 4

a longitudinal section through the suction rotor of Figures 1 to 3.

Fig. 5

a second embodiment of the invention in representation as in Fig. 1;

Fig. 6

the partial plan view of the object of FIG. 5 in representation as in Fig. 2, partially cut.

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 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 1 stored strappy cages are guided. This drafting system 1 delivers an unconsolidated fiber sliver warped to its final fineness 8 from. It is understood that the invention also in connection with Drafting systems of a different structure can be used.

The lower rollers 2 ', 3' and 4 'are common and therefore gear not shown here or via individual drives with each other in drive connection, which in Fig. 3 by lines of action 9 is indicated.

A compression device 10 is arranged downstream of this drafting device 1, which in the embodiment of FIGS. 1 to 4 as driven rotating, disc-shaped suction rotor 11 is formed which has only a small height H. To the narrow cylindrical one Circumferential surface 12 of this suction rotor 11 close bevels 13 on both sides. In this way, the suction rotor 11 be arranged so that it is in the outlet-side gusset protrudes between the rollers 4 ', 4' 'of the pair of output rollers 4 and the path that the unconsolidated emerging from the pair of exit rollers Fiber sliver 8 must travel freely, as short as possible is.

There is a perforation in the peripheral surface 12 of this suction rotor 11 14 arranged in the form of a series of small suction openings 15. 2, the suction rotor 11 is in the plane the perforation 14 cut to the suction openings 15 recognizable close. In the suction rotor 11 by means of a screen 16 a suction chamber 17 recognizable in FIG. 2 is formed. The suction chamber 17 is in shape with a suction source 18 indicated in FIG. 1 a suction pump 20 driven by a motor 19 via a pipeline running through the bearing housing 21 of the suction rotor 11 22 in connection. The suction chamber 17 shields by means of its screen 16, the suction openings 15 of the perforation 14 to to a compression zone 23 (FIG. 6), which extends over a Fraction of the circumference of the suction rotor 11 extends against the Suction from. The induced draft therefore only works in this compression zone 23 on the outside of the suction rotor 11.

This compression zone delimited by the stationary suction chamber 17 23 is arranged so that it on the pair of output rollers 4 begins at the closest circumferential point of the suction rotor 11. At the A pressure roller 24 is arranged at the end of the compression zone 23, via a holding arm 25 on the bearing housing 21 of the suction rotor 11 is stored. It is attached to the bearing housing 21 and on the holding arm 25 acting tension spring 26 on the peripheral surface 12 of the suction rotor 11 pressed and driven by this. The pressure roller 24 has an elastic covering. The suction rotor 11 with the suction chamber 17 arranged in it and the pressure roller 24 form the compression device 10.

As can be seen from Fig. 4, the shaft 27 of the suction rotor 11 hollow. This shaft 27 is by means of ball bearings 28 in the bearing housing 21 rotatable, at its lower end is a Suction rotor 11 driving tangential belt 29 on it. A Pressure roller 29 ensures secure contact of the tangential belt to the shaft 27. The hollow shaft 27 extends through the stationary pipeline 22, which is in the suction rotor 11 to the suction chamber 17 expanded. The suction rotor 11 has a diameter of, for example, 50 mm and is closed with a removable cover 31. The peripheral speed of the suction rotor 11 corresponds the delivery speed of the output roller pair 4 of Drafting system or is slightly higher. The speed of the suction rotor 11 is accordingly low.

The compression device 10 is in the embodiment of FIG Fig. 1 to 3 for turning and winding the delivered yarn 32 a common and therefore not described here in detail Subordinate ring spinning device 33. It includes a spinning spindle 34, in a containing their drive and their storage Spindle bench 35 sits and a ring bench 36, in which a spinning ring 37 is arranged, on which a ring traveler 38 rotates. The Yarn 32 runs the ring spinning device 33 over a thread guide 39 to.

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 caused by the one acting in the suction rotor 11 Suction in the compression zone 23 on the perforation 14 am Scope of the suction rotor 11 sucked in and on the narrow line of Intake openings 15 of this perforation are combined and compressed. In this condensed state, it becomes a clamping line conveyed between the suction rotor 11 and the pressure roller 24. The suction area and the compression zone 23 end there Leaving the clamping line between the suction rotor 11 and the pressure roller 24 is the fiber sliver 8 by the ring spinning device 33 pulled thread pull down and solidified by winding and wound.

5 and 6, the suction rotor 11 ' cylindrical and much higher than the suction rotor 1 to 3, so that it is not in the gusset of the pair of output rollers 4 can intervene. It is also a pressure roller for him 24 assigned. In the variant shown a pot spinning device 40 is arranged after it, the a spinning pot 42 stored in a pot bank 41 and in the by means of an arm 43 fastened and moved up and down Thread guide tube 44 of spinning cake 45 is formed.

Suction rotor 11 'and pressure roller 24 are in relation to the thread guide 39 of a downstream ring spinning device 33 or the Inlet opening of the thread guide tube 44 of a pot spinning device 40 arranged so that the yarn 32 when pulling out of the Clamp line between the suction rotor and the pressure roller over the Circumference of the suction rotor is pulled. As can be seen from Fig. 6, rolls this yarn 32 over the outer surface of the Suction rotor 11 'and is - especially when rolling over its lower edge - rotated. This rotation is wrong rotation. The direction of rotation of this wrong rotation can, however, be chosen the direction of rotation of the suction rotor 11 'are chosen so that the penetration of the by the ring spinning device 33 or real rotation in given by the pot spinner 40 the yarn 32 supports. To grant wrong rotation too support, the circumference of the suction rotor 11 'at least in its lower area, on which the yarn 32 rolls, with a Pad 46 can be provided with a high coefficient of friction.

It is assumed that S twist is given to the yarn produced is intended for what the spinning pot 42 in the in Fig. 6 with the arrow A specified direction of rotation is to be driven. So that on the suction rotor 11 'unwinding yarn is also granted S-twist, must the suction rotor 11 'with the opposite indicated by the arrow B. Rotate direction of rotation. It can be seen that for manufacturing of yarn with Z twist not only the directions of rotation of the Work units would be reversed, but also the compression zone 23 in the suction rotor 11 'and the pressure roller 24 to be shifted to the left side. The screen 16 of the suction chamber 17 can be rotated for this purpose for the pressure roller 24 can on the opposite side of the bearing housing 21 of the Suction rotor 11 'a further storage can be provided so that it can be easily implemented.

This beneficial effect of supporting the turning of the Yarns by giving wrong twist can also be related realized with the suction rotor 11 of the embodiment of FIGS. 1 to 3 become. Since the peripheral surface 12 of this suction rotor 11 is too low to have an effective rolling effect with false twist to ensure, it is provided here that Let yarn 32 roll on the pressure roller 24. The pressure roller 24 is for this purpose - as shown in Fig. 3 - over their contact area on the narrow peripheral surface 12 of the suction rotor 11 extended downwards. Elastic covering with higher coefficient of friction than steel, which supports rolling, has the pressure roller 24 anyway. Suction rotor 11 and Pinch roller 24 are in relation to the downstream thread guide 39 of a ring spinning device 33 arranged so that the end Yarn 32 is pulled over the unwind roller, unrolls on it and get wrong rotation. In this case, the Direction of rotation (arrow C) of the pressure roller 24 the direction of rotation Spinning spindle 34 (arrow A) must be opposite, the suction rotor 11 therefore rotate in the same direction of rotation (arrow B) as the spindle 34. As can be seen, the pressure roller 24 in Fig. 2 is on the opposite Side drawn as in Fig. 1st

In Fig. 3 it is also shown that the spinning spindle 34 for balloonless or reduced-balloon spiders with a spinning finger 47 can be equipped. This spinning finger 47 catches the tapered Yarn 56 directly below the thread guide 39, loops him around the sleeve 48 and leads him to the ring traveler 38 without a balloon to.

The device according to the invention can also be equipped with a core yarn device 49 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 also be seen from FIG. 3, the drafting system 1 assigned to this purpose two rolling rollers 50, one on which Core thread spool 52 containing core thread 51 rests. From one the unwinding roller 50 is the core thread 51 on the inlet side the top roller 4 '' of the output roller pair 4 of the drafting system. The unwinding rollers 50 are at a peripheral speed of the output roller pair 4 corresponding peripheral speed driven.

This ensures that the core thread 51 of the fiber sliver 8 with their withdrawal speed from the main delay field between the roller pairs 3 and 4 corresponding speed. The core thread 51 is turned into a roving inlet funnel 53 of the drafting system 1 adjusted and - by a thick, dash-dotted Line of action 54 indicated - together with this iridescent Core thread thread guide 55 directed. This will ensures that the core thread 51 of the fiber sliver 8 is always in the center is fed. He is therefore still running at this point broad fiber sliver 8 and is then in the subsequent Compression zone 23 by the effect of Suction pull of the close-together sheath fibers of the fiber fuse covered tightly and opaque and to core yarn 56.

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, Twist and winder 33 or 40 - and the optional - Like balloonless with spinning fingers 47 and core twine 49 - also in other than those described and shown Combinations can be realized.

List of reference numbers

1

Drafting system

2nd

Input roller pair

3rd

Middle roller pair

4th

Output roller pair

2 ', 3', 4 '

Bottom rollers

2 '', 3 '', 4 ''

Top rollers

5

Elastic covering

6

Low load and load

7

Strappy

8th

Sliver

9

Lines of action

10th

Compaction device

11, 11 '

Suction rotor

12th

Circumferential surface of the suction rotor

13

Chamfers

14

perforation

15

Suction openings

16

umbrella

17th

Suction chamber

18th

Suction source

19th

engine

20th

Suction pump

21

Bearing housing of the suction rotor

22

Pipeline

23

Compression zone

24th

Pressure roller

25th

Holding arm

26

Tension spring

27

Suction rotor shaft

28

ball-bearing

29

Tangential straps

30th

Pressure rollers

31

Cover of the suction rotor

32

yarn

33

Ring spinning device

34

Spinning spindle

35

Spindle bench

36

Ring bench

37

Spinning ring

38

Ring traveler

39

Thread guide

40

Pot spinning device

41

Potted bench

42

Spinning pot

43

poor

44

Thread guide tube

45

Spider cake

46

Rubber with a high coefficient of friction

47

Spinning fingers

48

Sleeve

49

Core yarn device

50

Unrolling rollers

51

Core thread

52

Core spool

53

Roving inlet funnels

54

Line of action

55

Core thread guide

56

Core yarn

A, B, C

Directions of rotation

H

height

Claims (12)

Spinning machine with drafting devices and with spindles and with rotating suction suction rotors arranged on the fiber path between the drafting devices and the spindles, provided with perforations on the circumference and internally under suction, by means of fiber lunches in a compression zone limited to part of the circumference of the suction rotors are sucked in and compressed,
characterized by that the axes of rotation of the suction rotors (11, 11 ') are arranged such that the plane of their perforation (14) coincides at least approximately with the plane which affects the two rollers of the pair of output rollers (4) of the drafting system in their clamping line and that the suction rotors are assigned axially parallel pressure rollers (24) which rest at the end of the compression zone (23) on the peripheral region of the suction rotors containing the perforation. Spinning machine according to claim 1,
characterized in that the height (H) of the suction rotors (11) is kept as low as possible. (Fig. 1 to 4) Spinning machine according to claim 2,
characterized by that the cylindrical peripheral surface (12) of the suction rotors (11) has bevels (13) on both sides. (Fig. 1 to 4) Spinning machine according to claim 2 or 3,
characterized by that the peripheral surface (12) of the suction rotors (11) protrudes into the gusset between the two rollers (4 ', 4'') of the pairs of output rollers (4). (Fig. 1 to 3) Spinning machine according to claim 1,
characterized by that the direction in which the yarn (32) or core yarn (56) produced is withdrawn from the circumference of the suction rotors (11, 11 ') or the pressure rollers (24) assigned to them, laterally offset from the axis of rotation of these suction rotors or pressure rollers and is skewed and the direction of rotation of the suction rotors or the pressure rollers and their loops through the drawn yarn or core yarn is selected such that the sense of the wrong rotation generated by a rolling of the yarns or core yarns produced from the jacket of these suction rotors or pressure rollers in the running yarn (32) or core yarn (56) coincides with the sense of real twist given to the yarn or core yarn by the devices (33, 40) producing the real twist. Spinning machine according to claim 5,
characterized by that the suction rotor (11 ') or the pressure roller (24), via which the yarn (32) or the core yarn (56) rolls, is extended in the direction of the roll of the yarn or core yarn. (Fig. 5) Spinning machine according to claim 6,
characterized by that the suction rotor (11 ') or the pressure roller (24) over which the yarn (32) or the core yarn (56) rolls, at least in the area in which the yarn or core yarn is unrolled, with a covering (46 ) is equipped with a high coefficient of friction. Spinning machine according to claim 1,
characterized by that the yarn (32) or core yarn (56) running off the suction rotor (11, 11 ') runs into a ring spinning device (33). (Fig. 1, 2; 3) Spinning machine according to claim 8,
characterized by that the spinning spindle (34) of the ring spinning device (33) is set up for spinning with a suppressed or reduced balloon. Spinning machine according to claim 9,
characterized by that the spinning spindle (34) of the ring spinning device (33) has a spinning finger (47). (Fig. 3) Spinning machine according to claim 8,
characterized by that the yarn (32) or corgarn (56) running off the suction rotor (11, 11 ') runs into a pot spinning device (40). (Fig. 5) Spinning machine according to claim 1,
characterized by that the drafting device (1) is assigned a device (49) for producing core yarn (56). (Fig. 3)

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