EP0947614A2 - Spinning machine with a drawing frame comprising a suction roller - Google Patents

Abstract

The suction roller (12) is located above the sliver (9) and works with a lower roller (11) that has the normal diameter for the fiber being spun. The lower roller (11) has a metallic surface and the suction roller has an elastic coating (5) or vice versa. Optionally the transfer roller (10) can have an apron to assist sliver transfer from the last drafting roller to the suction roller.

Description

The invention relates to a spinning machine with a drafting system, that delivers at least one fiber sliver to a pair of output rollers and which has a rotating suction roller at its exit, which the at least one fiber sliver by sucking on a perforation track under suction is compressed, the Suction area by means of a arranged inside the suction roller Coverage is limited to a compression zone.

Under a perforation track in the sense of the invention is one the circumference of the suction roll line separated from each other To understand suction openings in the jacket of the suction roll, can have a round or non-circular contour.

It is known (DE 44 26 249 A1) by a drafting system Spun machine warped and delivered sliver by means of one designed as a lower roller, i.e. below the drawing field level arranged suction roll or screen drum over which the Fiber sliver is led to summarize and condense. The For this purpose, the suction roll has a circumferential one Perforation track on that in the area where the fiber fuse is guided over the suction drum, is under suction. By this suction will be a certain width from the Delivery roller pair of the fibers of the fiber sliver running out sucked into the narrow perforation track and thus combined and condensed. The compressed runs from the suction roller Fiber sliver under rotation to which the rotation mediating device. This is usually a ring spinning device with ring, rotor and spindle, but it can also be designed, for example, as a pot spinning device.

The suction roll has a larger diameter than the usual Straightening rollers, since it is hollow and not one inside co-rotating, the perforation track on part of the circumference the screen covering the suction roll must contain the suction limited to the area in which the fiber sliver passes over the suction roll is led.

Experience shows that it is for the entry of the rotation into the fiber sliver running from an exit roller, for hairiness of the yarn produced, for the number of occurring Thread breaks and for other quality parameters of the generated Yarn is particularly advantageous if the run of a fiber sliver to the zone in which she is given rotation from an exit roller with the usual diameter of stretching rollers he follows. For yarns made of fibers with a staple length of Cotton, i.e. from about 25 mm to about 40 mm, would correspond to this an output roller with about 25 mm to 35 mm. This can be done with not realize the known suction roller.

To achieve this, the invention proposes that Arrange suction roller above the draft level and her a lower roller assign that has a diameter as it is for the processed fibers are familiar and from which the fiber fuse the zone in which it is granted rotation.

To avoid contact of metal with metal, one of the two rollers, preferably the suction roller, with an elastic Topping.

The perforation can usually be achieved by simultaneous insertion their holes through the elastic covering and mostly made of metal jacket of the suction roll through become. In some cases, however, it is advantageous the suction openings in the elastic covering and in the metal jacket to manufacture separately. In this case, there is a need the suction openings in the elastic covering and in the jacket to subsequently cover the suction roll. To do this to avoid, it is provided in a further embodiment of the invention, either the perforation in the jacket of the suction roll in one groove on the outside in the circumference of the suction roller or the perforation in the elastic covering in one on the inside to let the groove open into the elastic covering. Of course, both in the coat and in elastic covering a groove may be provided. This measure has the further advantage that the pitches and the diameter of the suction openings of the perforations in the jacket and in the elastic The suction roller lining does not have to match.

To avoid that of the pair of output rollers of the drafting system The fiber structure running to the suction roller, for example when deliberately switching off or in the event of an unwanted collapse of the on the Suction roller acting suction train falls or when passing by a traveling blower is blown through its blowing stream, is provided in a further embodiment of the invention Suction roller to assign a further lower roller, by a Belt is wrapped around, which is known by means of Guide means such as a deflection rail close to the Clamping line of the pair of output rollers of the drafting system extends. The fiber bandage is carried by the strap supported and prevented from tearing off.

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 shown, that this beneficial effect of compression spinning through thread balloonless or thread balloon reduced spinning even further can be increased. Thread balloonless or thread balloon reduced Spinning reduces the thread tension in the thread piece between the output roller pair of the drafting system and the spindle tip and increases the twist density in this thread piece. Apparently support these effects by compressing the fiber sliver effect.

A possibility for thread balloonless or thread balloon reduced Spinning exists when using ring spinning devices for turning and winding the fiber sliver using Spindle attachments such as spinning fingers or spinning crowns.

Another possibility for threadless balloon spinning is through Rotating and winding the fiber sliver using a pot spinning device given. Pot spiders also reduce thread tension in the thread between the deposit point of the yarn in the spinning pot and the output roller pair of the drafting system in comparison with a ring spinning device.

The arrangement can be such that the individual Workplaces condensed fiber slivers each Rotation-imparting organ fed like a ring spinning spindle - single yarns are produced here. The arrangement can but also be such that there are always two condensed fibers and run together to an organ that gives the rotation - so-called false twine is created.

Fig. 1

den Querschnitt durch Streckwerk und Spindelreihe der Erfindung;

Fig. 2 und 3

andere Vorrichtungen zum Drehen und Aufwinden des erzeugten Garnes in Seitenansicht;

Fig. 4

eine Variante der Verdichtungsvorrichtung der Fig. 1 im Querschnitt;

Fig. 5

die Ansicht der Verdichtungsvorrichtung der Fig. 1 von vorn, teilweise geschnitten;

Fig. 6

die Einzelheit des Ausschnitts I aus Fig. 5;

Fig. 7

den Schnitt durch Fig. 6 in Ebene A-A dieser Figur;

Fig. 8

das Streckwerk mit Einrichtung zum Herstellen von Coregarn in Darstellung wie in Fig. 1;

Fig. 9

eine weitere Variante des Streckwerkes wie in Fig. 1;

Fig. 10

die Ausgestaltung des Gegenstandes der Erfindung 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

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

2 and 3

other devices for rotating and winding the yarn produced in side view;

Fig. 4

a variant of the compression device of Figure 1 in cross section.

Fig. 5

the view of the compression device of Figure 1 from the front, partially cut.

Fig. 6

the detail of section I of Fig. 5;

Fig. 7

the section through Fig. 6 in plane AA of this figure;

Fig. 8

the drafting device with means for producing core yarn in representation as in Fig. 1;

Fig. 9

another variant of the drafting system as in Fig. 1;

Fig. 10

the design of the object of the invention for the manufacture of false yarn 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 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.

The drafting device 1 is a compression device 8 for the Drafting system 1 delivered, stretched to the desired fineness, but not yet consolidated fiber sliver 9. For this compression device 8 there are a number of advantageous embodiments, some of which are shown in the figures shown in the drawing and are described below.

In the embodiment of FIGS. 1, 4 and 8 there is the compression device 8 from one on two lower rollers 10 and 11 resting suction roller 12, the lower rollers like that Bottom rollers 2 ', 3' and 4 'of the drafting device 1 over the length of the Extend the drafting system area of the spinning machine.

The top roller 12 is only assigned to the relevant job, it can be used as a single top roller or - as shown in Fig. 5 - designed as a twin top roller and over a common Axis 21 together with its twin roller on the support and loading arm 6 be stored. The top roller 12 is also as Compaction suction roll formed. It is hollow for this purpose and has on its periphery a perforation 13 in the form of a the circumference of the suction roll 12 extending row of suction openings 14 on. 4, the suction roll 12 is in the plane this perforation 13 cut. The inside of the suction roller 12 is under suction, that of one in Fig. 4 only schematically shown pressure sink 15 is generated. The pressure sink 15 includes a suction pump 17 driven by a motor 16, the Suction via a hose or pipe 18 to one inside arranged suction chamber 19 acts. This fixed Suction chamber 19 is through a screen 20 in the suction roller 12 separated and is designed so that it by means of Screen the perforation 13 on most of its course covers against the suction and only in a compression zone 22 on the perforation or through it to the outside lets work. This compression zone 22 lies between the clamping lines the lower rollers 10 and 11 with the suction roller 12.

The upstream of the other lower roller 10 in the fiber run can as shown in Fig. 8, wrapped around a conveyor belt 23 be that also by a not shown Cage is guided such that its cantilever against the pair of output rollers 4 is directed. This conveyor belt 23 serves the unconsolidated delivered by the pair of output rollers 4 Fiber sliver 9 between the nip line of the pair of output rollers and the beginning of the compression zone 22 on the Top suction roller 12 to wear.

The drafting system designs of Figures 1, 4 and 8 each require five lower rollers 2 ', 3', 4 ', 10 and 11. In some cases can - as shown in Fig. 9 - dispensed with the lower roller 10 and their function is taken over by a conveyor belt 23 ' be, which wraps around the output lower roller 4 'and on Beginning of the compression zone 22 abuts the suction roller 12. It bridges the large distance between the nip line of the output roller pair 4 and the beginning of the compression zone 22 and bears the unconsolidated and vulnerable fiber sliver in this area 9. Since the output roller pair 4 is the output roller pair of the main drafting zone of the drafting unit 1, its effectiveness for the drafting of the drafting system from is of great importance, the output top roller 4 '' in this Trap be designed as a corrugated steel roller.

The downstream lower roller 11 from which the fiber sliver in the area in which she is given rotation has 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 suction roller 12 is usually made of steel. To metallic Contact between her coat and the usually also avoid steel lower rollers 10 and 11, which too Wear, noise, and glide would result in either Suction roll 12 or the lower rolls 10, 11 with elastic covering 5 Mistake. In the alternative shown in FIGS. 1, 5, 8 and 9 it is the suction roll 12 that with the elastic covering 5 is provided. In the alternative shown in FIG. 4 the lower roller 10, 11 are equipped with the elastic covering 5.

If the suction roller 12 has the elastic covering, must the suction openings 14 of the perforation 13 both through this elastic covering 5 as well as through the cylindrical jacket 24 of the suction roll. An alignment of these intake openings 14 in the elastic covering 5 and in the jacket 24 can of course by inserting, in particular drilling, the suction openings with elastic covering applied to the coat can be achieved. However, since the elastic covering 5 wears out and needs to be replaced occasionally, the problem is the suction openings 14 in the jacket 24 and in a newly drawn up to bring elastic covering 5 to cover.

This problem can - as shown in Figs. 6 and 7 - thereby be solved that the suction openings 14 in the jacket 24 of the suction roll 12 open into a groove 25 extending around its circumference. The suction train then acts via this groove 25 independently of the relative one Position of the suction openings 14 in the jacket 24 and in elastic covering 5 through to the outside of the suction roller 12. It goes without saying that the groove 25 also on the inside of the elastic covering 5 can be arranged or both the jacket 24 of the suction roll 12 and its elastic covering 5 a can have such a groove.

The lower rollers 2 ', 3', 4 'of the drafting device 1 and that of the compacting device 8 associated bottom rollers 10 and 11, as by the dash-dotted line of action drawn in FIG. 8 26 indicated, by means of a transmission, not shown or also by means of individual drives in coordinated, variable speed ratios driven.

The compression device 8 is in the embodiment of the Fig. 1 shows a common ring spinning device 27 with a spinning spindle 28, in a containing their drive and their storage Spindle bench 29 sits, and with a ring bench 30 Spinning ring 31 and ring traveler 32 downstream.

The spinning spindle can be used for balloonless or reduced balloon spinning 28 according to FIG. 2 at its tip with a spinning finger 33 be equipped. This spinning finger 33 catches the tapered Yarn 34 just below the thread guide 35, it loops around the tube 36 and passes it to the ring traveler 32 without a balloon.

According to FIG. 3, a common one can be used instead of the ring spinning device 27 and therefore also not described in detail here Pot spinning device 37 can be used. This Pot spinning device 37 comprises a spinning pot 38, which in a pot bank 39 containing its drive and its storage sits, and an up and down moving thread guide tube 40, the depositing yarn 34 in the spin pot to spin cake 41.

In operation, the drafting system 1 delivers from the output roller pair 4 a fiber sliver 9, which due to the diameter of the incoming Roving and the warping has a certain width. This fiber sliver 9 is held by the conveyor belt 23 8, the conveyor belt 23 'of FIG. 9 or - without Transport slips - due to the conveying effect of the pair of rollers 10/12 supplied to the compression zone 22. In this up to Pinch line between the suction roller 12 and the lower roller 11 extending Compression zone 22 is subject to the fiber sliver 9 Suction through the perforation 13. Be through this suction the fibers lying laterally in the fiber sliver 9 to the close Line of perforation 13 sucked in and the fiber sliver thereby condensed. In this condensed state it is in the Clamp line between the lower roller 11 and the suction roller 12 the ring spinning device 27 or alternatively to the pot spinning device 37 delivered and from this by rotation solidified and wound up.

The device according to the invention can also be equipped with a core yarn device 42 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 FIG. 8, the drafting system 1 becomes this Purpose assigned two unwinding rollers 43, one on which the core thread 44 containing core thread spool 45 rests. From one of the Roll-off rollers 43 is the core thread 44 on the inlet side of the Output roller pair 4 of the drafting system 1 out. The unrolling rollers 43 are at a peripheral speed of the pair of output rollers 4 driven peripheral speed. It is thereby achieved that the core thread 44 of the fiber sliver 9 with their withdrawal speed from the main delay field between the roller pairs 3 and 4 corresponding speed approaches.

The suction roller 12 containing the perforation 13 does not oscillate in the axial direction of the drafting rollers. The ability of the compactor 8 to suck in the fiber sliver 9 laterally, is limited. The fiber sliver 9 is therefore used in the invention Device does not or only changes in a very small width. So that the core thread 44 of the fiber sliver 9 is always fed in the center if the fiber sliver is not changed, it will also not and if the fiber sliver is changed, synchronously with this changes. This is done by a core thread guide 46 reached, which is stationary or synchronized with that Fibrous thread 9 at the entrance of the drafting system 1, alternating roving thread guide 47 is moved. The synchronization of the movements this roving or thread guide is only through here a dash-dotted active connection 48 is indicated. Specifically can the roving or thread guides can be mechanically coupled. Thereby it is ensured that the core thread 44 in the middle of the this point still runs broad fiber sliver 9 and in the subsequent compression zone 22 by the under effect of the suction pull of the cladding fibers of the fiber sliver is covered tightly and opaque to core yarn 49.

As indicated in Fig. 8, the core thread 44 'of the fiber sliver 9 can also be supplied at the beginning of the compression zone 22. He can then run directly to the suction roller 12. The one required here too Core thread guide is not shown.

10 finally shows the possibility that Set up compression device 8 for the production of false twine. Here, the suction roll 12 has a perforation 13 in Form of two rows of suction openings lying next to each other at a distance 14, by means of which two at a job of the drafting unit 1 of two roving bobbins 50, drawn separately in the drafting system and by the pair of output rollers 4 fiber sliver 9, 9 'delivered side by side still separated be compressed. Only after this has condensed Fibrous webs from the lower roller 11 of the compacting device 8 the two fiber lunches 9, 9 'converge at the union point 51 and are by the ring spinning device 27 or by the pot spinning device 37 to form a false thread 52 turned and wound up.

So that when one of the two breaks, the components of the False twine 52 forming fiber lunches 9, 9 'the remaining The fiber sliver does not continue as a single thread is a storage device provided that when one of the two components breaks the other also leads to breakage. This parking facility 53 consists of a trap 54 with a pair of pins 55, between which the false thread 52 runs through. The trap 54 sits on a support 56 with a narrow stability range and is on this can be tilted about an axis 57. If one of the two components of the false thread 52 breaks, the remaining one shifts Component laterally so far that the trap 54 out its stability range is pivoted out and down tilts. The remaining component is around the pair of pins 55 looped and by preventing rotation propagation also led to breakage.

It goes without saying that the two united to make false thread 52 Components also produced with the device of FIG. 8 Coregarne 49 can be.

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 8 and Twist and winder 27 or 37 - and the optional - Like balloonless by means of spinning fingers 33, core yarn device 42 and device for making false thread 52 - also in combinations other than those described and illustrated 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

Compaction device

9, 9 '

Fiber fuse

10, 11

Bottom rollers

12th

Top roller, suction roller

13

perforation

14

Suction openings

15

Pressure sink

16

engine

17th

Suction pump

18th

Hose, pipe

19th

Suction chamber

20th

umbrella

21

axis

22

Compression zone

23, 23 '

Transport straps

24th

Cylindrical jacket of the suction roll

25th

Groove

26

Lines of action

27

Ring spinning device

28

Spinning spindle

29

Spindle bench

30th

Ring bench

31

Spinning ring

32

Ring traveler

33

Spinning fingers

34

yarn

35

Thread guide

36

Sleeve

37

Pot spinning device

38

Spinning pot

39

Potted bench

40

Thread guide tube

41

Spider cake

42

Core yarn device

43

Unrolling rollers

44, 44 '

Core thread

45

Core spool

46

Core thread guide

47

Roving leader

48

Active connection

49

Core yarn

50

Roving bobbins

51

Unification point

52

False thread

53

Parking device

54

Cases

55

Pair of pins

56

In stock

57

axis

Claims (15)

Spinning machine with a drafting system that delivers at least one fiber sliver to a pair of output rollers and that has an all-round suction roller at its outlet, which compresses the at least one fiber sliver by suction onto a perforation track that is under suction, the suction area being opened by means of a screen arranged inside the suction roller a compression zone is limited,
characterized,
that the suction roll (12) is designed as a top roll lying above the drawing field plane and
that - viewed in the direction of travel - at the end of the compression zone (22) a lower roller (11) serving to drive it is assigned, which has the usual diameter for the processed fiber material and via which the fiber sliver (9, 9 ') of the device imparting the rotation (27, 37) approaches. Spinning machine according to claim 1,
characterized,
that the suction roller (12) is designed as a twin top roller. Spinning machine according to claim 2,
characterized,
that the lower rollers (10, 11) in the area acted upon by the suction roller (12) have a metal jacket surface and
that the suction roll is provided on its circumference lying on the lower rolls with an elastic covering (5). (Fig. 1, 5, 8, 9, 10) Spinning machine according to claim 3,
characterized,
that the suction openings (14) of the perforation (13) in the jacket (24) of the suction roller (12) and in their elastic covering (5) open into a circumferential groove (25) recessed in the outer surface of the jacket of the suction roller. (Fig. 6, 7) Spinning machine according to claim 3,
characterized,
that the suction openings (14) of the perforation (13) in the elastic covering (5) of the suction roller (12) open into a circumferential groove recessed in the inner surface of the elastic covering. Spinning machine according to claim 2,
characterized,
that the suction roller (12) has a metallic lateral surface (24) and that the lower rollers (10, 11) are provided with elastic covering (5) in the area acted upon by the suction roller. (Fig. 4) Spinning machine according to claim 2,
characterized,
that a conveyor belt (23, 23 ') is arranged between the pair of output rollers (4) and the suction roller (12). Spinning machine according to claim 7,
characterized,
that the conveyor belt (23) wraps around a lower roller (10) assigned to the suction roller (12). (Fig. 8) Spinning machine according to claim 7,
characterized,
that the conveyor belt (23 ') wraps around the output lower roller (4') of the drafting system (1). (Fig. 9) Spinning machine according to claim 9,
characterized,
that the corrugated twin lower roller (4 '') is associated with the output lower roller (4 ') wrapped around by the transport strap (23'). (Fig. 9) Spinning machine according to one or more of the preceding claims,
characterized,
that the drafting device (1) has a device (42) for producing core yarn (49) in addition to the compression device (8). Spinning machine according to one or more of the preceding claims,
characterized,
that the drafting device (1) has a device for balloonless or balloon-reduced spinning in addition to the compression device (8). Spinning machine according to one or more of the preceding claims,
characterized,
that the device for balloonless spinning is designed as a pot spinning device (37). Spinning machine according to one or more of the preceding claims,
characterized,
that the device for balloonless or balloon-reduced spinning is designed as a spindle attachment, in particular as a spinning finger (33) on the spinning spindle (28). Spinning machine according to one or more of the preceding claims,
characterized,
that the drafting device (1) is set up for producing false twine (52) and the compression device (8) is equipped with a perforation (13) having two parallel rows of suction openings (14) for processing two fiber slivers (9, 9 ') in parallel next to each other is.

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