EP0887448A2 - Method and apparatus for manufacturing a textile yarn - Google Patents

Abstract

A yarn is made from fibres that are produced from sliver (6) by an opening roller (4) and are then sucked on to a perforated collecting surface (12). The fibre bundle is deposited without twist on the continuously moving collecting surface (12) as a sliver (31) and is consolidated by twisting in a subsequent twisting zone (24). Also claimed is a recirculating collecting surface (12) with a narrow strip of perforations that run over and cover suction openings (21). The recirculating collecting surface (12) is followed by a twisting device (24).

Description

The invention relates to a method for producing a textile Yarn, in which by means of an opening roller from a Fibrous dressing sucked individual fibers onto a fiber collecting surface perforation associated with a suction source has and continuously a solidified and removed by turning Forms yarn from parallel and stretched fibers, and an apparatus for performing such a method suitable is.

It is known (US 5 497 609) for the manufacture of a textile Yarns separated fibers by means of a opening roller Feed fiber collection surface from a perforated gutter consists. The perforation of the gutter is connected to a pressure sink, so that the supplied fibers are sucked into the channel. The package formed in this way is more parallel Fibers are pulled out of the gutter while rotating. By offset Attach further fibers to the end of the thus formed Yarns when pulling off the fiber collection surface become a continuous one Spinning process reached.

In order to be able to pull off the fiber package sucked into the channel, it can be solidified by rotation. Both to give the needed Rotation as well as pulling is an aggregate of interacting, bound and counter-rotating straps intended. However, such straps are very subject high wear and tear, neither the rotation granted nor the pull-off speed can be determined exactly. In another embodiment the channel is separated by the gusset between two interacting axially parallel, perforated and by a suction acted upon, co-rotating rollers formed, between which the yarn is created.

When pulling the fiber package over the stationary or across The fiber collection surface moved in the pull-off direction must have the fibers over the holes of the perforation, into which they are partially are sucked in. There are two versions the risk of fibers being retained in the perforation thereby losing their parallel and stretched position and undesirably postpone and / or bend like a hairpin and / or corkscrew-like around the forming yarn lay.

The object of the invention was to remove the fiber bundle from the fiber collecting surface to improve. It solves them Task procedurally in that on the fiber collecting surface deposited fiber package without rotation as a fiber sliver from the Deposit area discharged and only in a subordinate Area of twist is solidified by twisting into a yarn.

The fact that the fiber package and the fiber sliver from the deposition area the advantage is achieved that the fiber sliver in this accumulation area to solidify it no rotation has to be granted, but that this Grant a rotation afterwards and outside the deposit area can be done. This separation of the deposit from fibers to a fiber package and a fiber sliver from giving the rotation and the discharge of the fiber sliver is affected at least the deposition of the fibers is very positive, since this is not disturbed by the simultaneous granting of rotation and the Do not pull parallel fibers in parallel is disturbed via a perforation. This way, a a ring spun yarn produced practically the same yarn.

Especially when producing coarse yarns with a large fiber mass in cross section, where a thick fiber package and a thick Fiber sliver is produced, it has proven to be advantageous to divide the fiber collecting surface into an upstream zone, in the fiber package and the fiber sliver from the sucked-in fibers are formed and in a subordinate zone in which the The cross-section of the fiber sliver is reduced.

In terms of device, the object of the invention is thereby achieved solved that the fiber collection surface as in the direction of movement the fiber sliver is formed around its surface Circumference has a narrow strip of perforation and the area of which the fibers gather over one with a Suction source connected suction channel that runs in its the rotating Area facing area with at least one opening is provided with the perforation of the circumferential Covering area and that the surrounding area is a device for Granting rotation is downstream.

By forming the fiber collecting surface all around, the Advantage achieved that the fiber package formed does not have a Surface to be deducted to which it adheres by suction. Rather, the fiber package is made up of the circumferential surface Deposition area carried out and the risk of adverse Confusion of the parallel fibers is avoided.

Through this discharge of the fiber package from the sliver formation zone there is also no need to consolidate the fiber package to give rotation on the fiber collecting surface. Rather, it can The fiber bundle can be removed without rotation as a fiber sliver and the twist can follow the yarn to be formed after leaving the Yarn formation zone. This can be advantageous through a proven and very common ring spindle device. Here, the rotation is given in the free running Yarn, which prevents the twist from jumping into the yarn is hindered by the yarn resting against the fiber collecting surface and turning is done evenly. Using a ring spindle for turning and winding supports the desired generation an almost ring-spun yarn.

In a first embodiment, the circumferential surface can be as endless, flexible straps should be formed, which at least a driven deflection roller runs and with the perforation is provided. In a second embodiment, the rotating Surface designed as a driven, hollow drum roller be that carries the perforation. The driven deflection roller or the drum roller forms a fiber sliver with a counter roller promotional pair of rollers. This achieves the advantage that the withdrawal speed of the fiber sliver is precisely defined and done very evenly and both the constant Cross-section as well as the constant rotation per unit length of the yarn formed is secured.

Compared to a drafting device, the opening device offers whose also with a correspondingly high delay Fibers could be delivered, the advantages of being a possibility for separating foreign bodies and that Inlet roller pair of such a drafting system is bypassed, the extremely slow rotation speed lead to inconsistent running can.

Units like the perforated one with a suction channel interacting, circumferential straps or those with perforation provided, interacting with a suction channel, rotating Drum rollers are known from so-called compaction spinning. Here, however, they only have the task of using a drafting system summarize broadly delivered fiber sliver so that the issued Twist can jump into the yarn more easily, sticking out Fibers are more easily spun in or do not drift off spun fibers is avoided.

In a further embodiment of the invention it is proposed that to give the surrounding area a wide perforation and the opening of the suction channel in a first zone in which the fibers are on the fiber collection surface are also carried out broadly and rejuvenate them in a subsequent second zone. This has the advantage that even with deposits of a dense fiber package, the fibers suction suction is maintained and the formed wide fiber package merged into a narrow fiber sliver becomes.

The opening of the suction channel can be a through opening or also designed as a perforation in the form of holes or slits be. Especially when it is designed as a perforation is, their density in the direction of the circumferential surface increase to preferential suction of the leading ends of the effect sucked fibers and thus a stretched as possible To achieve storage of the fibers in the fiber package.

Further advantageous embodiments of the invention are shown in the further subclaims.

Fig. 1

den Querschnitt durch eine erste Ausführungsform der Spinnvorrichtung mit umlaufender Fläche in Form eines Riemchens;

Fig. 2

die Draufsicht auf die Fasersammelfläche der Fig. 1;

Fig. 3

eine Variante der Ausführungsform der Fig. 1 und 2 im ausschnittweisen Querschnitt;

Fig. 4

den Querschnitt durch eine zweite Ausführungsform der Spinnvorrichtung mit umlaufender Fläche in Form einer rotierenden Trommel;

Fig. 5

die Draufsicht auf die Fasersammelfläche der Fig. 4.

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

Fig. 1

the cross section through a first embodiment of the spinning device with peripheral surface in the form of an apron;

Fig. 2

the top view of the fiber collecting surface of Fig. 1;

Fig. 3

a variant of the embodiment of Figures 1 and 2 in partial cross-section.

Fig. 4

the cross section through a second embodiment of the spinning device with a peripheral surface in the form of a rotating drum;

Fig. 5

the top view of the fiber collecting surface of FIG. 4th

The spinning device according to the invention has a device by means of which fibers are separated from a supplied sliver solved and dissipated. As can be seen from FIGS. 1 and 4, this device can be one of the type used in open-end spinning machines Dissolving device 1. This consists of an in a housing 2 rotating at high speed in the direction of the arrow, with a sawtooth set 3 opening roller 4 and one also driven in the direction of the arrow shown Feed roller 5, the sliver 6 over a feed trough 7 of the sawtooth set 3 of the opening roller 4 feeds. Out the wall of the housing 2 surrounding the opening roller 4 branches off Waste channel 8 from, through the foreign body 9, which when the Sliver 6 are free to be thrown off. In the direction of rotation the opening roller 4 is the waste channel 8 a fiber channel 10 downstream, through which the fibers 11, due to the high peripheral speed the opening roller 4 individually from the sliver 6 can be resolved, occasionally freely requested.

In the embodiment of FIGS. 1 to 3, this fiber channel opens 10 over an endless, flexible strap 12, which has two deflection rollers 13 and 14 is guided, of which at least one is driven is and allows the straps to circulate, but also alternatively, the pressure roller 22 can be driven and over direct contact by means of straps 12, the deflection rollers 13 and 14 drives. The strap 12 is centered around its circumference a perforation 15 in the form of arranged in at least one row, small, round holes 16. The perforation can but also a different shape, for example oval or approximately rectangular Holes.

The upper strand 17 of the mouth facing the fiber channel 10 Strappy 12 runs over the convexly curved surface 18 of one lying inside the apron between the deflection rollers 13, 14 Suction channel 19, which is connected to a pressure sink, not shown is. This surface 18 overrun by the strappy 12 of the suction channel 19 also has a perforation 20 which from a row lying transverse to the direction of movement of the strappy Slots 21 is made. The perforation 20 of the suction channel 19 is designed as elongated slots, even for lateral Offset between the perforations of the suction channel and the strap to ensure the operability of the device. The Length of the area in which the perforations 15 and 20 cover, corresponds approximately to the stack length of the processed Fibers.

The one at the outlet of the strap 12 from the perforated surface 18 of the suction channel 19 arranged deflection roller 13 is a pressure roller 22 assigned a pair of rollers 23 with the deflection roller forms. This pair of rollers 23 is one that is familiar from ring spinning machines, here shown on a smaller scale ring spindle 24 subordinate. This ring spindle has a driven spindle 25, by means of which a yarn 26 given by a rotor 28 rotating on a ring 27 and wound this yarn into the yarn winding 29 of a cop 30 becomes.

In operation of the device, those of the resolver 1 isolated fibers 11 by the suction of the pressure sink, the through the perforations 15 and 20 of the straps 12 and the Suction channel 19 in the fiber channel 10 acts on the perforation sucked the strappy. There they are stored in a fiber package 31 from that by the circulation of the straps 12 as a fiber fuse 32 carried out of the mouth region of the fiber channel 10 and is fed from the pair of rollers 23 to the ring spindle 24. By the constant feeding of fibers 11 and the simultaneous discharge of the fiber bundle 31 are formed, the fibers are stored roof tile-like to the endless fiber sliver 32 together. The ring spindle 24 issued by the pair of rollers 23 delivered without rotation Fiber sliver 32 twist and winds the yarn thus formed 26 on the cops 30.

In the embodiment of FIGS. 4 and 5, the fiber channel 10 opens above the surface of a drawn in the direction of the Arrow rotating, driven drum roller 33 around its Perimeter has a perforation 15 ', the axially parallel Slots 16 '.

The drum roller 33 is cup-shaped here, so that from a suction channel 34 protrude into its open side can. The suction channel 34 in this embodiment has the Inner wall of the drum roller 33 facing only one area opening 35 covering the perforation 15 'of the drum roller. The width of this opening 35 corresponds to a first area 36 approximately the length of the slots 16 'of the perforation 15' of Drum roller 33 and tapers in a subsequent area 37.

In a manner not shown, the suction can also from go out a suction channel arranged outside the drum roller and work through the roller. The drum roller is then on the inside of its peripheral surface with a non-rotating Mask covered only in the area of the suction channel and Functional openings in the area of the fiber collecting surface having.

The drum roller 33 is as in the embodiment of FIG. 1 to 3 a pressure roller 22 associated with the drum roller forms a pair of rollers 23 '. Also one downstream of the pair of rollers 23 ' Ring spindle 24 corresponds to that in connection with those Figures described.

When the device is operating, the resolution device 1 individual fibers 11 by the suction of the pressure sink, through the opening 35 of the suction channel 34 and the perforation 15 'of the drum roller 33 acts in the fiber channel 10 the perforation of the drum roller sucked. They camp there in the area 36 due to the slot shape of the perforation 15 'in a comparatively wide fiber package 31 '. If the Slots 16 'of the perforation 15' of the drum roller 33 through the Rotation come in the area 37 in which the width of the opening 35 decreases in the suction channel 34, the fiber bundle 31 'is increasing contracted to the width of the opening and narrow Fiber fuse 32 narrowed. This fiber sliver 32 is by the pair of rollers 23 'discharged from the sliver formation zone and then rotated and wound by the ring spindle 24.

In the embodiment of FIG. 4 and 5 accordingly from a first area 36 in which a wide Fiber package 31 'is formed and a subsequent area 37, in which the broad fiber package forms a narrow fiber sliver 32 is narrowed and narrowed. This division of the sliver formation zone into an accumulation area 36 and a compression area 37 is in particular with thick slivers of fiber many fibers in cross-section advantageous.

This division of the sliver formation zone into an area 36 for Forming the fiber package and an area 36 for summarizing the fiber sliver is also in the embodiment of FIGS. 1 to 3 possible. As can be seen from Fig. 3, the strap 12 'is extended, so that it extends over the two areas 36 and 37 can. Not in the cross-sectional representation of this figure recognizable, the perforation 15 of the straps 12 'in this Trap multiple, adjacent rows of holes 16 or but slots like the drum roller 33 of Figs. 4 and 5 on and the length of the slots 21 of the perforation 15 of the suction channel 10 in the direction of the strappy 12 gradually decreases to thus bringing together the fiber sliver 32 '.

It is of course also possible in the embodiment of the 4 and 5 to dispense with this division of the sliver formation zone and only one attachment area 36 to form the Provide fiber bundle and the fiber sliver.

In Fig. 3 it is also shown that the deflecting effect of the deflecting roller 14 of FIGS. 1 and 2 also by a rounded edge 38 of the suction channel 19 can be achieved. Likewise, from FIG. 3 recognizable that the density of the perforation 20 in the suction channel 19 increases, i.e. the mutual distance of the slots 21 in the direction the discharge of the fiber sliver 32 can decrease. Thereby acts in this area a higher suction, the higher Flow resistance of the increasingly denser towards the outlet Compensate fiber packs and approximately the same suction effect to ensure the fibers 11.

As not shown, the fiber package and the Fibrous sliver-forming organs can also be arranged so that the The fiber collecting surface is at the bottom and the fibers are attached to it from below be sucked in. This has the advantage of a casual break-in the sliver 6 and lower height.

List of reference numbers

1

Dissolver

2nd

casing

3rd

Sawtooth set

4th

Opening roller

5

Feed roller

6

Sliver

7

Food trough

8th

Waste channel

9

foreign body

10th

Fiber channel

1

1 fibers

12, 12 '

Strappy

13, 14

Deflection rollers

15, 15 '

perforation

16, 16 '

Holes, slots

17th

upper run

18th

surface

19th

Suction channel

20th

perforation

21

Slits

22

Pressure roller

23, 23 '

Pair of rollers

24th

Ring spindle

25th

spindle

26

yarn

27

ring

28

runner

29

Yarn winding

30th

Kops

31, 31 '

Fiber package

32

Fiber fuse

33

Drum roller

34

Suction channel

35

opening

36

Attachment area

37

Compression range

38

Edge

Claims (14)

Process for producing a textile yarn, in which individual fibers are sucked from a fiber assembly by means of a disintegration roller onto a fiber collecting surface which has perforations connected to a suction source and continuously forms a twisted and drawn yarn from fibers lying parallel and stretched,
characterized in that
the fiber bundle deposited on the fiber collecting surface is discharged without rotation as a fiber sliver from the deposition area and is only consolidated in a subsequent rotation area by turning it into a yarn. Method according to claim 1,
characterized in that
In a preceding zone of the fiber collecting surface, a fiber package is formed from the sucked-in fibers, and the cross section of the fiber package is reduced in a downstream zone of the fiber collecting surface. Device for producing a textile yarn, with a fiber separating opening roller and with a fiber collecting surface which has perforations connected to a suction source, to which the separated fibers are sucked in essentially parallel and stretched,
characterized in that
the fiber collecting surface is designed as a circumferential surface (12, 33) which has a narrow strip of perforation (15, 15 ') around its circumference and the fibers collecting area (36) of which runs over at least one suction opening (21, 35) , which coincides with the perforation of the circumferential surface and that the circumferential surface is followed by a device (24) for imparting rotation. Device according to claim 3,
characterized in that
the peripheral surface is designed as an endless, flexible strap (12) which runs over at least one driven deflecting roller (13, 14). Device according to claim 3,
characterized in that
the peripheral surface is designed as a driven, hollow drum roller (33). Device according to claim 4 or 5,
characterized in that
the deflecting roller (13) driving the apron (12) or the drum roller (33) with a counter roller (22) forms a pair of rollers (23, 23 '). Device according to claim 3,
characterized in that
a plurality of openings (21) of the suction channel (19) are designed as perforations (20) and slit-shaped. Device according to claim 7,
characterized in that
the density of the perforation (20) of the suction channel (19) increases in the running direction of the peripheral surface (12, 33). Device according to claim 7,
characterized in that
the slit-shaped openings (21) of the suction channel (19) are long in an attachment area (36) and become increasingly shorter in a compression area (37) adjoining the circumferential surface (12). Device according to claim 3,
characterized in that
one opening (35) of the suction channel (34) is wide in an attachment area (36) and narrows in a compression area (37) adjoining the running surface (33). Device according to claim 4,
characterized in that
the surface (18) of the suction channel (19) touched by the strap (12) and having the opening (21) is convexly curved. Device according to claim 4,
characterized in that
the strap (12) is guided over two deflecting rollers (13, 14). Device according to claim 4,
characterized in that
the strap (12) is guided around a deflection roller (13) and around a deflection rail. Device according to claim 13,
characterized in that
the suction channel (19) has a deflection edge (38) for the strap (12).

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