JPH0841734A - Method for spinning and spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve good collection of fiber bundle in the area of a suction zone and to eliminate the problem of the control of air flow while reducing the labor of the operation of the apparatus. SOLUTION: A suction air supplied from an exterior source is guided to the circumference of a suction roll 25 in a passage part 15 for collection by a properly guided suction air 34 to compress a fiber bundle along the passage part 15 and generate a compact fiber strand 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliver or kneading machine having a small twist, such as a flyer frying roving of a roving bobbin, in order to obtain a total draft ratio required for a yarn count to be produced. The sliver is guided through a multi-stage drafting device, and after the fiber bundle thus obtained exits from the final nip gap of the drafting device, a predetermined path portion is formed on the circumferential surface of the suction roller without drafting. Through, to the anti-twist gap formed by the suction roller and the anti-twist counter roller,
A spinning method for allowing the fiber bundle to reach a spinning device from the twist-holding gap under twisting, in which at least the main portion of the path portion is circumferentially radially inward of the outer peripheral surface of the suction roller in the circumferential direction. To form a suction zone having a width slightly larger than the fiber bundle, and the final draft has already been made by the air flowing into the suction roller from the outside toward the inside along the path portion. However, the convergence of untwisted fiber bundles,
It relates to a process carried out so as to obtain compact fiber strands with a width of less than 1.5 mm, preferably less than 1 mm.

The invention further relates to a spinning machine for carrying out the method according to claim 1, which comprises at least one multi-stage drafting device in which the sliver is fed from a roving bobbin or a sliver can. , A suction roller is connected, in a predetermined path portion in the fiber bundle supply direction, a convergence stage for the fiber strands is provided on the circumferential surface of the suction roller, and at the convergence stage,
The converging of bundles of drafted but not yet twisted fibers results in compact fiber strands with a width of less than 1.5 mm, preferably less than 1 mm. Further, a spinning device provided subsequent to the twist stop gap is provided, and the spinning device applies a predetermined twist to the compact fiber strand exiting from the twist stop gap, and the spinning device is arranged in the circumferential direction. The present invention relates to a type in which a suction region having a width slightly wider than that of a fiber bundle is formed radially inside the outer peripheral surface of a suction roller along at least a main portion of the path portion.

[0003]

2. Description of the Related Art In the case of such a known ring spinning method or ring spinning machine [German Published Patent Application No. 3927936 and "textil praxis interna"
tional ", September 1993, pp. 684-686], one or two flyer frying slivers in parallel are fed to each half of the drafting unit of the ring spinning machine. This causes the sliver to be drafted in this drafting device at the usual draft value and then fed, without further drafting, to the aerodynamic fiber compaction provided on the perforated suction roller. That is, in the case of this known method, an aerodynamically compact compression of the fiber bundle is performed on the surface of the perforated suction roller or suction drum,
The separation of the fiber drafting and converging processes has a positive effect. For the purpose of compression, the drafted fiber bundle held on the surface of the suction drum by the suction air flow is displaced in the axial direction of the suction drum, so that the fibers are oriented parallel and drawn inside the fiber bundle. Moreover, the convergence is achieved by stacking the individual fibers on top of each other by lateral movement. The blown air flow assists the action introduced by the suction action by the impingement action on the surface, so that the individualized fibers are transported to the nip line for the twisting action during the operation of the respective acting air flows. It is located in a stable equilibrium state.

Hydrafting followed by aerodynamic compression of the fibers results in compact fiber strands having a width of about 1 mm or less. This width is at the same time the base of the spinning triangle (Spinndreieck) following the twist gap.
(Basis). This inevitably reduces the height of the spinning triangle. Therefore, the twisting of the fiber bundle can be influenced through the fact that the fibers are aerodynamically converged.

In the case of a general-purpose type, in a ring spinning machine, a three-cylinder type draft device (Drei-Zylinder-Strec
kwerk) is used. The middle pair of cylinders provided at the beginning of the high draft area is generally equipped with a double belt. These double belts reach close to the entry gap of the exit roller pair.

The draft ratio of the three-cylinder type draft device supplied with the flyer lifting roving is 25 depending on the yarn fineness.
~ 50 times. A higher draft ratio corresponds to a smaller yarn count. Between the ends of both belts in the main draft zone and the nip gap between the two exit side cylinders of the drafting device, mechanical condensers have already been used to focus the fiber bundle (German patent). Published application No. 4132919 and published German patent application No. 4141237). However, yarn quality is only improved to a certain extent by such measures. This is because the friction of the individual fibers in the guide elements of the condenser leads to irregularities in the yarn bundle. For this reason, the capacitors provided at the ends of the main draft zone are still not the optimum means for a significant improvement in yarn quality.

The blow-air flow required in the known ring spinning method and ring spinning machine increases the equipment effort required for the convergence of the fiber bundles in the suction zone and is also important for achieving the convergence. However, it becomes difficult to mutually adjust the strength and direction of the suction air flow and the strength and direction of the blow air flow.

[0008]

The object of the present invention is to improve the spinning method as described at the beginning, in particular, the ring spinning method,
The aim is to provide a spinning method which achieves good convergence of the fiber bundles in the region of the suction zone, reduces the effort on the device and eliminates the problems of air flow regulation.

A further object of the invention is to provide an advantageous spinning machine, in particular a ring spinning machine, for carrying out this method.

Yet another object of the invention is to reduce the required power output of the aerotechnical device associated with this method, ie to reduce the blow power and suction power, independently of the presence of blow air, or Without a blower, only the suction power would be reduced to improve the compression of the fiber bundle.

[0011]

In order to solve this problem, the method according to the present invention advantageously compresses the fiber bundles along the path section only by appropriately guided suction air, without additional blow air. So as to produce a compact fiber strand, in order to guide the suction air from the outside mainly having an axial component to the peripheral surface of the suction roller in the area of the path portion, in the area of the path portion for converging. I chose

In order to solve the above-mentioned problems, in the structure of the device according to the present invention, the fiber bundles along the path portion are appropriately guided with or without a device for supplying additional blow air. Suction air guide means are provided radially outside the circumferential surface of the suction roller in the region of the converging path so that a compact fiber strand is produced by being compressed by air. The guide means guides the suction air from the outside to the circumferential surface of the suction roller in the area of the route portion.

[0013]

The idea of the invention is that the suction air stream is guided outside the suction roller with or without blow air, in which case the fiber bundles originating from the multi-draft device are axially, It is based on the fact that it is converged with a strength such that a width of less than 1.5 mm and preferably less than 1 mm is obtained. By means of the air guiding means according to the invention, the sucked suction air stream is bent in a direction having at least one axial component before reaching the fiber bundle. Advantageously, two mutually facing partial air streams from opposite sides of the fiber bundle act on this fiber bundle. As a result, the fiber bundles are converged to give a narrow and compact fiber strand.
Shortly after the action of the partial air streams facing each other, these partial air streams are guided through the perforated peripheral area of the suction roller into the suction roller and from this location to the suction section. If a wall is provided on the other side of the suction zone, as in claim 7 or 8, then in some cases even a weak airflow, which is supplied mainly in the axial direction, is sufficient.

Advantageous configurations of the suction air guiding means according to the invention are obtained further from claims 3-6.

According to the measure of claim 6, the deflecting shield extends in the feed direction to the end of the path part, preferably from the beginning to the end of the path part. It is extended.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described with reference to the embodiments shown in the drawings.

As shown in FIGS. 1 and 2, from the roving bobbin 12 arranged above, the flyer lifting roving 11 is introduced into the three-cylinder type draft device 13 through the diverting element 28. To be done. This drafting device comprises a front drafting zone 23 having a pair of inlet rollers 37, 37 'and a main drafting zone 24. The roller pairs 29, 29 'provided at the end of the front draft zone 23, i.e. at the start of the main draft zone 24, are of known type and are provided with belts 30, 30' only shown schematically. These belts extend into the pull-in gap of the outlet roller pair (25, 26).

The lower roller of the outlet roller pair is formed as a perforated suction roller 25 having a significantly larger diameter than the remaining rollers. The rotary shaft 36 of the suction roller 25 forms the final nip gap 14 of the draft device 13 together with the counter roller 26 on the draft device outlet side.

The fiber bundle running through the draft device 13 continues to the nip gap 14 on the outlet side, and along the curved path portion 15 to a twist-preventing counter roller 27 over a part of the peripheral surface of the suction roller 25. It is circulated.
This anti-twist counter roller, together with the suction roller 25, forms an anti-twist gap 16 for the fiber bundle.

As shown in FIG. 2, the suction roller 2
The perforations 35 of 5 extend all the way around, but only over a small width of the peripheral wall of the suction roller 25.
However, the size of the suction roller 25 is formed so that the fiber strand 22 is always in contact with the perforation 35 in consideration of the swaying motion that occurs depending on the case of the fiber strand 22.

Inside the suction roller 25, a concentric shield 32 interrupted in the region of the path portion 15 is arranged. In this case, the perforation 35 of the suction roller 25 is based on the fact that the negative pressure is maintained in the inner chamber of the shield 32.
An air flow is generated from the outer side to the inner side in the flow direction of the suction air 34, which is indicated by the arrow.

Following the anti-twist gap 16, the fiber bundle, while being twisted, reaches a conventional ring spinning device 17. The ring spinning device comprises a ring rail 18, a ring 19, a traveler 20, a spindle rail 38 and a spindle 21, and a ring spinning yarn 39 is produced from the compact fiber strands 22 generated from the twist gap 16.

The total draft ratio in the draft device 13 is advantageously 80 to 100 times. Front draft area 23
The draft ratio at 1.
It is only within the limit of 1 to 1.3 times.

As shown in FIGS. 1 to 3, a suction zone 33 provided inside the shield 32 as a penetrating portion.
Is not only limited to the length of the path portion 15 in the circumferential direction, but is also limited to the predetermined width d in the width direction. This width is of the same order as the width of the area of the perforations 35.

According to the present invention, as shown in FIGS. 1 to 3, a deflection shield 40 is provided outside the suction roller 25 in the radial direction and above the suction zone 33. When viewed in the circumferential direction, this deflecting shield has substantially the same structure as the rollers 2
6 and 27 over the path portion 15 between each other and, in the axial direction, they extend beyond the width d of the suction zone 33 on both sides. The distance A of the deflecting shield 40 from the outer surface of the suction roller 25 is substantially equal to the width d of the suction zone 33. This deflection shield 40 projects beyond the suction zone 33, preferably by a dimension D on both sides. The ratio of A: d is 0.8 to 1.2, while the ratio of D: A is preferably D: A> 1.

Due to the fact that the deflecting shield 40 extends laterally significantly beyond the suction zone 33 by the dimension D, the suction air 34 sucked in from the outside is forced from both sides. Flowing mainly axially towards the fiber strands 22 located approximately in the middle of the suction zone 33. At this location, the air flow strikes the fiber strands 22 entirely, mainly from both axial sides. This causes the fiber strands to be strongly compressed in the axial direction so that a very good fiber bundle is achieved, which results in a compact fiber strand 22 with a width significantly smaller than 1 mm.

Subsequent to the high drafting mainly performed in the main draft area 24, that is, between the nip gap 14 between the roller 26 and the suction roller 25, and the anti-twist gap 16 between the anti-twist counter roller 27 and the suction roller 25. In the fiber convergence area (path portion 15)
Thus, the fiber strands 22 are converged so that outstanding yarn quality is obtained behind the anti-twist gap 16 without being drafted and without being given a blow air flow. That is, the converging according to the invention not only eliminates the fiber bundle expanding effect in the main draft region, but also brings about a significant improvement in yarn quality beyond compensating this expanding effect.

3 (a) and 3 (b) show possible embodiments of the suction zones 33; 33 'in the embodiment shown in FIG.

In the case of the embodiment shown in FIG. 4, the deflecting shield 40 ', which is also arranged concentrically to the suction roller 25, has an opening 42 on only one side. Through this opening the suction air 34 can mainly flow axially towards the suction zone 33.
On the other side, the deflecting shield 40 is provided with a wall 31 protruding inward in the radial direction. This wall is substantially aligned with the lateral partition of the suction zone 33 located on this side of the deflection shield 40 '.

According to this embodiment, mainly in the axial direction,
Suction air 34 acting partially radially on the fiber strands 22 causes the fiber bundles to simultaneously engage the wall 31 and the perforations 35.
As a result of the crimping of the fiber bundle, this fiber bundle is compressed between the suction air 34 and the wall 31 and is thus converged to give a very narrow and compact fiber strand of less than 1 mm.

FIG. 4 (a) shows a possible embodiment of the suction zone 33 "in the embodiment shown in FIG.

In the case of the ring spinning machine, the normal case is shown in FIG.
Since a large number of spinning points as shown in FIG. 4 are arranged side by side, the deflection shield 40 'may extend from the opening 42 to the adjacent suction zone. Further, in the adjoining suction zones, a wall that is a mirror image of the wall 31 is provided in alignment with the opposing partitions of the suction zones. In this case, however, a sufficiently large opening must be provided at the end of the diverting shield 40 ', either circumferentially or in the diverting shield 40' itself, for the entry of air from the outside. .

In the embodiment of the present invention as shown in FIGS. 3 and 4, in the region of the suction zone 33 or in the region of the path portion 15, the deflecting shields 40; Based on the idea that a partial annular gap 41 is formed between the suction roller 25 and the outer surface, into which air can flow mainly axially from only one side or from both sides. ing.

In the usual case, as described above, one ring spinning machine is provided with 400 to 500 spinning points arranged side by side. Generally, one drafting device arm corresponds to four side-by-side drafting zones. further,
Since one suction roller 25 can correspond to one drafting device arm, this suction roller 25 is effectively spaced from one another in four areas 3 of the perforation.
Have five. Each of these perforated areas is provided with a deflection shield 40, 40 'as shown in FIG. 3 or FIG.

[Brief description of drawings]

FIG. 1 is a side view schematically showing only one spinning point of a ring spinning machine according to the present invention.

2 is a front view of the spinning portion of FIG. 1. FIG.

FIG. 3 is an enlarged view schematically showing a first embodiment of the suction air guiding means according to the present invention along the line III-III in FIG. 1, and FIG. 3 (a) shows the first embodiment. It is a figure which shows one example of a suitable suction slit in the state seen in the radial direction, and FIG. 6B is a figure which shows another example of this suction slit in the state seen in the radial direction.

FIG. 4 is an enlarged view schematically showing a second embodiment of the suction air guiding means according to the present invention along the line III-III in FIG. 1, and FIG. FIG. 4 shows an advantageous embodiment of a suction slit for the purpose of looking in the radial direction.

[Explanation of symbols]

11 Flyer fried roving, 12 roving bobbin, 33
Draft device, 14 nip gap, 15 path part, 16 twist stop gap, 17 ring spinning device, 18 ring rail, 19 ring, 20
Traveler, 21 Spindle, 22 Fiber Strand, 23 Front Draft Area, 24 Main Draft Area, 2
5 Suction roller, 26 Exit side roller, 27
Anti-twist counter roller, 28 turning element, 2
9,29 'roller pair, 30,30' belt, 31
Wall, 32 shield, 33, 33 ', 33 "suction zone, 34 suction air, 35 perforation,
36 rotary shafts, 37, 37 'inlet side roller pair,
38 spindle stand, 39 ring spinning, 40,
40 'diverting shield, 41 partial annular gap,
42 opening

Front Page Continuation (72) Inventor Herbert Stahlder Kolbrunn Forderebenthalstraße 9 Switzerland

Claims (11)

[Claims] 1. A sliver or kneading machine with a small twist, such as a flyer roving roving (11) of a roving bobbin (12), in order to obtain the total draft ratio required for the yarn counts produced. Multi-stage drafting device for sliver (13)
After passing through the fiber bundle thus obtained through the final nip gap (14) of the drafting device (13), a predetermined route portion is formed on the circumferential surface of the suction roller (25) without drafting. Via (15)
Suction roller (25) and anti-twist counter roller (2
7) is a spinning method in which the fiber bundle is supplied up to the twist-prevention gap (16) formed by and the fiber bundle is allowed to reach the spinning device (17) under twist in the circumferential direction. At least along the main part of the path portion (15), a suction zone (33) having a width slightly larger than the fiber bundle is formed inside the outer peripheral surface of the suction roller (25) in the radial direction. Part (1
Along the line 5), the air flowing from the outside to the inside into the suction roller (25) causes the convergence of the fiber bundles which have already been final drafted, but which have not yet been twisted. A method for obtaining a compact fiber strand (22) having a width of 5 mm or less, in which a compact bundle is obtained by compressing the fiber bundle along the path portion (15) with appropriately guided suction air (34). In the area of the path portion (15) for converging, suction air from the outside is applied to the circumferential surface of the suction roller (25) in the area of the path portion (15) so as to generate fiber strands (22). Spinning method characterized by guiding. 2. A spinning machine for carrying out the method according to claim 1, comprising at least one multistage drafting device (13) fed with sliver from a roving bobbin (12) or a sliver can. A suction roller (25) is connected to the draft device, and a convergence stage (25) for the fiber strands (22) is provided on the circumferential surface of the suction roller (25) at a predetermined path portion (15) in the fiber bundle supply direction. , 26, 27) are provided, and the drafted but not yet twisted fiber bundles are converged at the converging stage, so that compact fiber strands with a width of 1.5 mm or less ( 22), and the twist gap (1
6) is followed by a spinning device (17) for applying a predetermined twist to the compact fiber strand (22) emerging from the twist gap (16). And a suction region (33) having a width slightly wider than the fiber bundle is formed inside the outer circumferential surface of the suction roller (25) in the radial direction along at least the main part of the path portion (15) in the circumferential direction. Of the type described, the fiber bundles along said path portion (15) are compressed by a suitably guided suction air (34) with or without an additional blow air supply device. So that a compact fiber strand (22) is produced thereby in the region of the path portion (15) for converging, radially outside the circumferential surface of the suction roller (25). Suction air guiding means (40, 40 ') is provided on the side, and the suction air guiding means guides suction air (34) from the outside to the suction roller (25) in the area of the path portion (15). A spinning machine characterized by being guided to the peripheral surface. 3. A deflection shielding body, in which the suction air guiding means is arranged at a slight distance (A) from the outer surface of the suction roller (25) and is curved at least approximately corresponding to the suction roller (25). (40, 40 '), the suction air (34) is further provided with at least a major axial component of the deflecting shield (40, 4').
0 ') from one or both sides towards the suction zone (33) and one of the deflection shields so as to converge the fiber bundles to give a compact fiber strand (22). 3. The spinning machine according to claim 2, wherein one side or both sides terminate near the suction zone (33). 4. The radial distance (A) of the deflecting shield (40, 40 ') from the outer surface of the suction roller (25).
Is almost equal to the width (d) of the suction zone (33), and the deflecting shield (40) has a suction zone (33).
4. A dimension (D) laterally projecting beyond and the ratio of the radial distance (A) to the width (d) of the suction zone (33) is 0.8 to 1.2. The described spinning machine. 5. The spinning machine according to claim 3, wherein the deflecting shield (40, 40 ') extends at least substantially coaxially with the suction roller (25). 6. The diverting shield (40, 40 ′) according to any one of claims 2 to 5, wherein the diverting shield (40, 40 ′) extends to the end of the path portion (15) when viewed in the feed direction. Spinning machine. 7. A gap (41) between the suction roller (25) and the deflection shield (40 ') is provided on one side of the suction zone with the outer surface of the suction roller (25) and the deflection shield. A wall (3 that extends between the inner surface of (40 ') and
The spinning machine according to any one of claims 2 to 6, which is partitioned by 1). 8. The wall (31) has a suction roller (2).
8. The extension according to claim 5, which is perpendicular to the axis (36).
The described spinning machine. 9. The spinning machine according to claim 2, wherein the suction roller (25) forms the outlet side roller of the drafting device (13). 10. A twist stopper in which a suction roller (25) is arranged also on an opposing roller (26) on the exit side of a draft device at a predetermined angle offset by the amount of the path portion (15). Spinning machine according to any one of claims 2 to 9, which is also applied to the counter rollers (27). 11. A twist stop gap (16) between a suction roller (25) and a twist stop counter roller (27).
11. The method according to any one of claims 2 to 10, wherein
The spinning machine described in the item.