CN1370869A - Spinning machine with many spinning spindle positions - Google Patents

Abstract

The spinning machine has a number of spinning positions, each of which has a drafting device and a subsequent collection area for collecting the drafted fiber sliver. Each assembly area has a revolving air-permeable conveyor belt, which is guided on a sliding surface with suction slots. The individual sliding surfaces are arranged on a suction pipe extending over several spinning positions and are each covered with a cover. The conveyor belt transports the sliver across a nip region delimiting a collection area to a separation point. Just after the separation point, the conveyor belt is guided unsupported over a groove. The groove extends respectively between the two spinning positions as an open channel for easy access to a mobile blower.

Description

Spinning machine with many spinning positions

technical field

The invention relates to a spinning machine having a plurality of spinning positions arranged next to each other and blown by a mobile blower, each of which has a drafting device with a front roller pair and a drafting The collection area where the drawn strands are assembled downstream of the stretching device, the collection area has a revolving air-permeable conveyor belt, which is guided on a sliding surface with a suction slot and arranged on a suction pipe Pass through, at the same time cover with a protective cover at the suction seam position, and transport the fiber strip across a jaw region delimiting this collection area to a separation point, and extend without support at a certain distance from this separation point. Passes over the grooves of the suction ducts on several spinning positions.

Background technique

The drafted sliver is then subjected to spinning twist on the drafting device of the spinning machine. If this spinning twist is present directly after drafting, then a so-called spinning triangle is possible at the front roller pair of the drafting device, which has side fibers that just don't Completely woven into the twisted yarn. In order to avoid this disadvantage, a so-called collection area has been arranged after the drafting device in recent years, in which the drawn but not yet twisted fiber strands are integrated by lateral merging of the individual fibers. Bundle or collection, so this unfavorable spinning triangle no longer exists after setting another nip position. If the assembled strands are then spun twisted, a yarn is formed that is less hairy, more uniform and more resistant to breakage than conventional yarns.

The spinning machine of the type mentioned at the beginning has explained its state of the art by DE 19922861 A1. For this spinning machine, the individual collection areas are each covered with a cover at the suction slot, so that a mobile blower moving along it on the spinning frame does not interfere with the fibers to be collected. strip. In particular, fiber deposits may form in the area between the inner side of the conveyor belt and the stationary sliding surface, which deposits should be avoided as much as possible. In addition to cleaning the outside of the conveyor belt there are also measures, for example the cross-sectional contour of the suction pipe should be cleaned and the inside of the conveyor belt should also be cleaned. The cleaning method of the outer side of the conveyor belt is to make the circularly rotating conveyor belt slightly touch a driven lower roller of the front roller pair of the drafting device. Since the conveyor belt and the lower roller run in opposite directions at this point, fiber fly can be removed from the outside of the conveyor belt in this way. The known suction tube has a groove at this contact point. However, this groove proves to be particularly dangerous because it lies directly before the conveyor belt enters the sliding surface. The fiber components scraped off by the cross-sectional shape of the suction tube on the inner side of the moving belt accumulate in the enumerated groove locations and stick there. The accumulation of fibers at this critical point can lead to adverse effects on the spinning process, in particular by reducing the effect of the accumulation action due to progressive blockage of the holes in the conveyor belt.

Contents of the invention

The object of the invention is to prevent, as far as possible at all, fiber accumulations from initially forming on the inner side of the conveyor belt.

The solution to this task is to provide a groove immediately after the separation point and to continue between the two spinning positions in each case as an open channel for easy access to the mobile blower.

The open channel in the spinning position is thus easy to reach the mobile blower from the operating side. The mobile fan can blow air flow into the groove between the spinning positions, which air flow is deflected axially and passes through the groove as far as below the conveyor belt, in particular as far as the groove mentioned. Thus, during the spinning process, the entire inner side of the conveyor belt can be cleaned in the region of the grooves after the conveyor belt has been released from the sliding surface. Blow off any fibrous particles that have collected there. In order to prevent these fiber particles from entering adjacent spinning positions, in the design scheme of the present invention, a boundary surface for blocking fiber fly can be provided in an open groove between two spinning positions respectively.

Suction ducts can be provided for the grooves, which extend over several spinning positions and have a corresponding projection with a profiled profile. The profiled projection then simultaneously forms a recess at each individual spinning position and an open groove between two spinning positions in each case.

In order to guide the conveyor belt through the grooves, the suction pipe can be equipped with two half-housing guides for the conveyor belt at the spinning positions, which are spaced apart from each other at the grooves. The distances described are used so that the inner sides of the conveyor belt are not supported in the region of the grooves. Another advantage of this design solution is that the suction duct can be arranged at a considerable distance from the front roller pair of the drafting unit, and that the two housing halves contain the sliding surfaces and bridge between the suction duct and the front roller pair. this spacing. In this way, the sliding surface extends in the desired manner until it abuts against each pair of front rollers, while between each two spinning positions the suction duct has a sufficiently large distance from the driven lower drum, Thus due to this spacing, the mobile blower can also clean this area.

Further advantages and features of the invention are found in the following description of an exemplary embodiment.

Description of drawings

The picture shows:

Fig. 1 is a partial cutaway side view of a collection area of a spinning spindle position;

Fig. 2 is the view on the assembly area on arrow II direction among Fig. 1, wherein some parts, especially pressure roller are removed;

Fig. 3 is a view on the assembly area in the direction of arrow III in Fig. 1, wherein some parts are also removed here.

Detailed ways

The spinning machine shown in FIGS. 1 to 3 is primarily a ring spinning machine. It usually has a number of spinning positions arranged next to each other in its longitudinal direction, of which three spinning positions 1 , 2 and 3 can be seen in FIG. 2 .

Each spinning position 1, 2, 3... also has a drafting device 4, only its end area is shown in Fig. The collection area 6 where the fiber strands 5 are bundled, follows the drafting device 4 . The other components of the spinning positions 1, 2, 3 are not shown in the figures. Each drafting device 4 also includes a front roller pair 7 and an apron pair arranged in front of it with a lower apron 8 and an upper apron 9 . The remaining roller pairs of the drafting device 4 are not shown together.

The initial roller pair 7 has a driven lower drum 11 that extends to a plurality of spinning positions 1, 2, 3... at which a roller is produced in a known manner Grooved part 12. In each spinning position 1, 2, 3..., the grooved area 12 corresponding to the lower drum 11 is provided in a known manner with a pressure roller 13, wherein in the same known manner, respectively, two phase rollers can be placed The press rolls 13 of adjacent spinning positions are combined into a so-called double press roll.

The front roller pair 7 defines the front nip line 14 at which the stretching zone of the drafting device 4 ends. The fibrous material 15 fed in the drafting device 4, for example a fiber sliver or a roving, is stretched in a known manner in the transport direction A to the desired count.

Following the drafting device 4 for the reasons described above is the collection zone 6, in which the fiber strand 5, which has not yet been spun twisted, is bundled or collected by the lateral merging of its individual fibers.

Each collection area 6 contains a revolving air-permeable conveyor belt 16 which transports the fiber strands 5 to be assembled through the collection area 6 . Conveyor belt 16 is essentially a thin, densely stitched fabric belt in which the same can be said for the air permeability itself. The conveyor belt 16 is guided over a sliding surface 17 formed by a suction duct 18 extending to a plurality of spinning positions 1 , 2 , 3 . . . The suction line 18 is connected via a vacuum connection 19 to a source of vacuum, not shown.

In the sliding plane of each spinning position 1, 2, 3... there is a suction slot 20, which is arranged slightly inclined relative to the direction of movement B of the conveyor belt 16 and is therefore provided with a lateral fold 21, to be The assembled fiber strip 5 just moves along this folding edge. At this folding edge 21, the fiber strip 5 is assembled due to the lateral merging of its individual fibers, and the fiber strip 5 is easily drawn in incidentally. Thus, the aggregation effect is also enhanced. At a certain distance from the suction slot 20 , the conveyor belt 16 is guided over a tensioning element 22 .

A pinch roller 23 is arranged at the end of the collection area 6, which drives the conveyor belt 16 and forms a nip portion 24 with the sliding surface 17, the suction slot 20 is approximately against this nip portion and this portion is relatively difficult for spinning. In terms of yarn twisting, it forms a stop twisting. Then the yarn 25 is formed next to the nip site 24 by making the yarn leave the sliding surface 17 at a separation point 36 and being delivered to a twisting mechanism not shown in the feed direction C, e.g. a ring. The clamping rollers 23 now prevent the spun twist formed on the yarn 25 from retreating into the collection zone 6 . What be used to drive pinch roller 23 is a toothed belt 26 that just represents with dotted line, the design of this belt should guarantee that the peripheral speed of pinch roller 23 will be slightly greater than the speed of pressure roller 13.

It has proven to be advantageous if the contact of the lower roller 11 with the conveyor belt 16 takes place in an unsupported position 29 , where the lower roller 11 and the conveyor belt 16 move in opposite directions in terms of the movement sequence. A mechanical cleaning of the outer side of the conveyor belt 16 is thereby additionally produced.

The fiber strip 5 is covered without contact in the area between the front roller pair 7 and the clamping roller 23 by a cover 30 which is supported on the sliding surface 17 in the vicinity of the side of the conveyor belt 16 . As can be seen in particular from FIGS. 2 and 3 , only the sliding surface 17 assigned to the collection area 6 is covered by the cover 30 . The region 28 of the suction pipe 18 between the spinning positions is not covered at all.

If the moving zone blower 31 shown in Fig. 2 travels along the spinning machine corresponding to the arrow directions D and E and frees the spinning machine from accumulated fiber fuzz, then the individual, corresponding to the spinning positions 1, 2 , 3... the protective cover 30 just can realize that interference fault does not take place in the spinning process.

As can be seen from FIG. 1, the inner side 32 and the sliding surface 17 of each conveyor belt 16 form a wedge-shaped triangular space 33, which is particularly prone to the accumulation of fiber fly. When the fiber strip 5 is transported through the collection area 6, there are always single fibers or the side enters below the conveyor belt 16, or passes through the holes on the conveyor belt 16 and enters on the inner side 32 of the conveyor belt, where they are on the conveyor belt. Under certain conditions, it is conveyed together with the belt and finally reaches the wedge-shaped triangular space 33, where it is then stuck and consolidated. Such wedge-shaped triangular spaces 33 are therefore particularly sensitive to fiber fly. This may lead to the fact that the fibers gathered in the wedge-shaped triangular space 33 suddenly break off in an uncontrollable manner and enter the fiber strip 5 to be assembled again in an undesired manner, or simply more and more block the transport. The holes in the belt 16 thus weaken the gathering effect and produce undesired hairiness of the yarn. The task of the invention is therefore to prevent the fibers from gathering at all at all at the wedge-shaped triangular table space 33 .

The measure for remedying said disadvantages consists in providing a profiled projection 34 at the suction pipe 18 with a recess 35 pointing towards the inner side 32 of the conveyor belt 16 . This groove 35 is located just after the separation point 36 of the aggregated sliver 5 from the conveyor belt 16 and continues between the spinning positions 1, 2, 3 . . . as an open channel 37 for easy access to the mobile blower 31 . If a mobile blower 31 movable along the spinning machine blows air into the split groove with compressed air, then this compressed air (see arrow L in FIG. 2 ) is deflected in the longitudinal direction of the groove 37 and thus from the side. Enter the groove 35 that is positioned at the back of conveyor belt 16, thereby just removed slightly the fiber aggregate that gathers up at once. In order to prevent the blown fiber fuzz from entering into the adjacent spinning position 1, 2, 3..., a block is provided between the two spinning positions 1, 2, 3... Boundary surface 38 of fiber fly.

The wedge-shaped triangular space 33 is out of reach of the suction pipe 18 which extends to the several spinning positions 1 , 2 , 3 . . . More precisely, for each spinning position 1, 2, 3 . Sliding surface 17 of air gap 20 . Both housing halves 39 , 40 are clamped on the suction pipe 18 for guiding the conveyor belt 16 from two opposite sides and are secured by at least one clamping screw 41 . The housing halves 39 , 40 bear on the profiled projection 34 of the suction pipe 18 and are spaced apart from each other on the groove 35 .

If the individual sliding surface 17 is arranged not directly on the suction pipe 18 but on the upper housing half 39 , the suction pipe 18 itself can be arranged at a distance from the front roller pair 7 . The housing half 39 comprising the sliding surface 17 and the suction slot 20 bridges the distance between the suction duct 18 and the front roller pair 7 . A relatively large gap 42 is thus formed between the two spinning positions 1 , 2 , 3 . This large gap 42 serves to keep the spinning machine clean between the two spinning positions 1 , 2 , 3 .

In the region of the individual spinning positions 1 , 2 , 3 . . . , the suction duct 18 has relatively wide suction openings 43 with relatively large outer dimension tolerances. The suction openings 43 are tightly covered by the respective upper casing half 39 during assembly and cooperate with the individual suction slots 20 .

Claims (4)

1. spinning machine, have many mutual adjacent layouts and by the spinning spindle position of a portable Hairdryer, these spinning spindle positions respectively have one to have a drafting system and the set district that follows the drafting system downstream closely, makes the fiber band set of process drawing-off that front roller is right, this set district includes the ventilative conveyer belt of a circulation rotation, that it is provided with suction slot at one and be arranged in the process that leads on the sliding surface on the suction tube, and cover by a protecting cover at the suction slot position; Conveyer belt is transported to a burble point with ribbon through the jaw position in a limiting set district always, and move through not having on supporting ground reaches a plurality of spinning spindle positions in stretching, extension the groove of suction tube with burble point a distance, it is characterized in that, groove (35) just is arranged on burble point (36) afterwards, and respectively at two spinning spindle positions (1,2,3) the open type groove (37) as sensible portable hair-dryer (31) between continues to extend.

2. by the described spinning machine of claim 1, it is characterized in that for groove (35), suction tube (18) disposes corresponding section ledge (34).

3. by claim 1 or 2 described spinning machines, it is characterized in that the open type groove (37) between two spinning spindle positions (1,2,3) has a retaining and falls the boundary face (38) that fiber flies hair respectively.

4. by any described spinning machine in the claim 1 to 3, it is characterized in that suction tube (18) is at spinning spindle position (1,2,3) locate to dispose two half outer covers (39,40) that conveyer belt (16) is led, they have a spacer segment distance mutually on groove (35).

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